JP2598896Y2 - Floppy disk drive - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floppy disk drive, and more particularly to a carriage base of a magnetic head carriage.

[0002]

2. Description of the Related Art Conventionally, a lower support arm of a magnetic head carriage in a floppy disk drive of this type is fixed to a carriage base of the magnetic head carriage. On the other hand, the upper support arm of the magnetic head carriage is connected to the carriage base with a leaf spring interposed therebetween, and is formed so as to be vertically movable. The upper support arm is urged by a carriage base so as to always rotate downward via a coil spring.

When the floppy disk is not inserted, the upper support arm rises against the coil spring by the pressing force of the carrier plate or the like by the head expanding mechanism, and a state in which the upper support arm has a certain distance from the lower support arm. I keep it. Here, when the floppy disk is inserted, the floppy disk is inserted between the upper support arm and the lower support arm. Further, with the lowering of the carrier plate or the like due to the release of the head expanding mechanism, the upper support arm rotates downward by the bias of the coil spring, and the magnetic head of the upper support arm moves the magnetic recording surface of the floppy disk. Press against

Thus, the magnetic recording surface of the floppy disk is sandwiched from both upper and lower surfaces by the magnetic head of the upper support arm and the magnetic head of the lower support arm described above.
It becomes readable and writable.

[0005]

In the magnetic head carriage of the conventional floppy disk drive, the operation of holding and opening the floppy disk by the upper and lower magnetic heads upon insertion and ejection of the floppy disk is performed by the magnetic head carriage. This is performed by moving the upper support arm up and down.

When the floppy disk is inserted, as described above, the upper support arm released from the pressing by the carrier plate or the like rotates downward by the bias of the coil spring. At this time, the coil spring sandwiches the floppy disk between the upper and lower magnetic heads, and the leaf spring contacts the surface of the floppy disk properly without tilting the magnetic head so that the data read / write operation is smoothly performed. Appropriate elastic deformation is required.

When an unexpected impact is applied to the upper support arm of the conventional magnetic head carriage (especially during assembling work), the leaf spring supporting the upper support arm often undergoes plastic deformation. As a result, the floppy disk may not be properly held between the upper and lower magnetic heads, and the read / write operation of the floppy disk may be disabled.

Therefore, even if an unexpected impact is applied to the upper support arm, there arises a technical problem to be solved in order for the upper support arm to operate properly. The purpose is to solve the problem.

[0009]

SUMMARY OF THE INVENTION The present invention has been proposed to achieve the above-mentioned object, and is a floppy disk drive device equipped with a magnetic head carriage, wherein the magnetic head carriage has a carriage base. And an upper support arm and a lower support arm.
The carriage base and the upper support arm are connected by a leaf spring, and a coil spring is interposed between the carriage base and the upper support arm to urge the upper support arm downward. In the floppy disk drive device, the lower surface of the leaf spring and the plate
The upper surface of the carriage base and the step
It is an object of the present invention to provide a floppy disk drive device in which a projecting portion having a difference is projected from a front surface of the carriage base portion so that the projecting portion can restrict downward bending of the leaf spring.

[0010]

When a shock is applied to the upper support arm supported on the carriage base of the magnetic head carriage from above, a bending force acts on a leaf spring connecting the upper support arm and the carriage base. However, since the leaf spring comes into contact with the protrusion protruding from the carriage base in the vicinity of the lower surface of the leaf spring, downward bending is restricted. Therefore, the leaf spring does not undergo plastic deformation, and the displacement of the upper magnetic head is prevented.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to FIGS. Reference numeral 1 denotes a floppy disk drive, and a front panel 3 is provided at the front of a chassis 2.
An opening 5 for a floppy disk 4 is formed in the center of the front panel 3 and an eject button 6 is provided on one side of the front panel 3. A magnetic head carriage 7 is mounted at the rear center of the chassis 2, and a cover 8 is covered on the upper surface of the chassis 2.

A slide guide rod 9 is provided on the side of the magnetic head carriage 7, and the magnetic head carriage 7
The slide guide rod 9 penetrates a guide bracket 10 projecting from one side of the slide bracket. Therefore, the slide guide rod 9 serves as a guide when the magnetic head carriage 7 moves back and forth. A guide pin 12 protrudes from one side of the carriage base 11 of the magnetic head carriage 7, and the lead screw shaft 14 of the stepping motor 13 and the guide pin 12 are engaged. Therefore,
In conjunction with the rotation direction of the lead screw shaft 14, the magnetic head carriage 7 moves forward or backward along the slide guide rod 9.

The lower support arm 15 of the magnetic head carriage 7 is fixed to the carriage base 11. on the other hand,
The upper support arm 16 of the magnetic head carriage 7 includes:
Leaf spring 1 having one end fixed to the upper surface of carriage base 11
7 is connected to the carriage base 11 so as to be fixed to the other end of the upper arm 7, so that the upper support arm 16 is formed so as to freely move up and down. Further, a coil spring 18 is interposed between the upper surface of the carriage base 11 and the upper surface of the upper support arm 16 to urge the upper support arm 16 to always rotate downward. Further, an upper magnetic head 19 and a lower magnetic head 20 are mounted on the inside of the respective tip portions 16a and 15a of the upper support arm 16 and the lower support arm 15 via a gimbal (not shown). Then, a projection 21 having a step difference from the upper surface of the carriage base 11 on the lower surface of the leaf spring 17 and close to the leaf spring 17 is provided on the carriage base 11.

When the floppy disk 4 is not inserted, the locking piece 22 protruding from the side of the tip portion 16a of the upper support arm 16 is pressed upward by the carrier plate 23. The upper support arm 16 is expanded at a certain distance from the lower support arm 15 against the bias, and this state is always maintained.

When the floppy disk 4 is inserted through the insertion slot 5 of the front panel 3, the floppy disk 4 is inserted between the upper support arm 16 and the lower support arm 15 of the magnetic head carriage 7. The carrier plate 23 pivots downward, and the upper support arm 16 is released from the upward pressing force by the carrier plate 23 and pivots downward by the urging of the coil spring 18. Thus, the upper magnetic head 19 and the lower magnetic head 2
0 contacts the magnetic recording surface in such a manner as to sandwich the floppy disk 4 from both upper and lower sides, and the floppy disk 4 is set in a readable / writable state. In this state, the leaf spring 1
7 does not come into contact with the protruding portion 21, so that the characteristics such as the bending characteristics and moment of the leaf spring do not change at all.
The magnetic head can be brought into good contact with the surface of the floppy disk.

When an impact is applied to the upper support arm 16 from above, the downward bending of the leaf spring 17 is restricted by the projection 21 projecting from the carriage base 11. Therefore, plastic deformation does not occur in the leaf spring 17, and various adverse effects such as data read / write failure caused by the displacement of the upper magnetic head 19 can be eliminated.

The present invention can be variously modified without departing from the spirit of the present invention, and it is natural that the present invention extends to the modified one.

[0018]

According to the present invention, as described in detail in the above-mentioned embodiment , the carriage base is provided on the lower surface of the leaf spring supporting the upper support arm and in the vicinity of the leaf spring. The carriage base portion is provided with a projection having a step with the upper surface of the portion.
Since the projecting front leaf spring also accidental impact or the like to the upper support arm is applied is brought bent by shock, bending by the projection portion is restricted within a predetermined range. Depending, the leaf spring is that of without causing any deformation. In this way, the upper and lower magnetic heads properly hold the floppy disk, and reading and writing to the floppy disk are correctly performed.

[Brief description of the drawings]

FIG. 1 is a partially cutaway plan view of a floppy disk drive device.

FIG. 2 is an essential part side view of the magnetic head carriage showing a state where an upper support arm and a lower support arm are expanded.

FIG. 3 is a side view of a main part of the magnetic head carriage in a state where an upper support arm and a lower support arm are closed.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Floppy disk drive device 7 Magnetic head carriage 11 Carriage base part 15 Lower support arm 16 Upper support arm 17 Leaf spring 18 Coil spring 21 Projection

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) G11B 17/32 G11B 21/12

Claims (1)

(57) [Scope of request for utility model registration] 1. A floppy disk drive device equipped with a magnetic head carriage, the magnetic head carriage comprising a carriage base, an upper support arm and a lower support arm, and further comprising the carriage base and an upper support. A floppy disk drive device which is connected to the arm by a leaf spring, and in which a coil spring is interposed between the carriage base and the upper support arm to urge the upper support arm downward; In the lower surface of the leaf spring , and at a portion close to the leaf spring,
A protrusion having a step with the upper surface of the carriage base protrudes from the front surface of the carriage base , so that the protrusion can restrict downward bending of the leaf spring. Floppy disk drive device.