JP3402337B2 - Magnetic head protection structure for magnetic recording / reproducing device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic head protection structure for a magnetic recording / reproducing apparatus including a carrier unit having a magnetic head for recording / reproducing a magnetic disk.

[0002]

2. Description of the Related Art As shown in FIG. 3, a conventional magnetic recording / reproducing apparatus for recording / reproducing a magnetic disk opens / closes a shutter 41 provided in a magnetic disk body 40 having a magnetic disk housed in a resin case. It includes a shutter drive mechanism and an ejector mechanism for ejecting the magnetic disk body 40. The eject lever 50 serves both as an element of a shutter drive mechanism for opening and closing the shutter 41 and an element of an ejector mechanism for ejecting the magnetic disk body 40.

The ejector mechanism is provided in the receiving portion (not lost) of the magnetic disk body 40 in the magnetic recording / reproducing apparatus. The shutter 41 is the magnetic disk main body 40.
3 can be slid along the edge of FIG. The eject lever 50 is rotatable about a rotary shaft 51 that is supported by a frame unit (not shown). The state shown in FIG. 3 is a state before the magnetic disk body 40 is completely stored in the receiving portion. A magnetic head 60 is provided in the receiving portion, and the magnetic head 60 is provided in the carrier unit 61.

Now, when the magnetic disk body 40 is pushed in the direction of the arrow in FIG. 3, the tip of the eject lever 50 engages with the upper end of the right edge of the shutter 41, and the magnetic disk body 40
The eject lever 50 rotates clockwise in accordance with the movement. Along with this, the shutter 41 is driven leftward in the drawing by the tip of the eject lever 50. The eject lever 50 is biased counterclockwise by a spring mechanism.

FIG. 4 shows a state in which the magnetic disk body 40 is completely stored in the receiving portion, and the magnetic disk body 40 is held in the receiving portion in this state by a lock mechanism (not shown). In this state, the shutter 41
The window 42 (also provided at the opposite position on the lower surface side) of the access area (magnetic disk) 44 exposed from the window 43 provided in the resin case of the magnetic disk main body 40. Located on top. Similarly, on the lower surface side of the magnetic disk body 40, the window 42 provided in the shutter 41 is located directly below the access area 44 exposed from the window 43 of the case of the magnetic disk body 40. Moreover, on the lower surface side of the magnetic disk body 40, the magnetic head 60 is in a state of being accessible just below the access area 44. Note that the shutter 41 is biased by a spring member so as to be in the position of FIG. 3 in the normal state.

A notch 45 is formed at the upper end of the magnetic disk body 40, and in the normal state shown in FIG.
A recessed portion is formed at a position adjacent to the upper end of the right side edge of the shutter 41 so that the protrusion 52 of the eject lever 50 can enter.

By the way, in the state shown in FIG. 4, as is well known, the magnetic disk body 40 itself is locked by the lock mechanism, and the magnetic disk body 40 does not pop out from the receiving portion. When the lock mechanism is unlocked in this state, the magnetic disk body 40 is ejected by a biasing mechanism (not shown) so that a part of the magnetic disk body 40 protrudes from the receiving section, and the magnetic disk body 40 is ejected from the receiving section. You can withdraw.

Since the eject lever 50 is biased counterclockwise by the spring mechanism, the shutter 41 closes the window 43 of the case body in parallel with the ejection of the magnetic disk 40 from the receiving portion.

In the magnetic recording / reproducing apparatus, the carrier unit 61 is held by a frame unit (not shown), and the carrier unit 61 is housed between the frame unit and a cover body (not shown). . That is, the frame unit is provided with components that configure the eject mechanism, components that hold the magnetic disk body 40, and a carrier unit 61 that holds the magnetic head 60. These parts are covered with a cover body to assemble the magnetic recording / reproducing apparatus.

[0010]

However, in the magnetic recording / reproducing apparatus, since the carrier unit 61 is held in the frame unit and the carrier unit 61 is held in the receiving portion, the cover body is bent inward by an external force. In this case, there is a problem that the carrier unit 61 is pressed and the magnetic head 60 is eventually damaged.

Therefore, an object of the present invention is to protect the head body from damage when the eject bar held by the frame unit hits the cover body earlier than the carrier unit when the cover body is flexed by being applied with a load by some external force. It is to provide a magnetic head protection structure for a magnetic recording / reproducing apparatus.

[0012]

According to the present invention, there is provided a frame unit and a cover member attached to the frame unit, and a magnetic disk receiving portion surrounded by the frame unit and the cover member. The receiving unit includes a carrier unit including a magnetic head that faces an access area of the magnetic disk when the magnetic disk is housed in the receiving unit, and an eject lever for ejecting the magnetic disk from the receiving unit. in the magnetic recording and reproducing apparatus provided in the carrier unit and the eject lever, the is held in a frame unit, the eject lever has a projection which extends so as to face the cover member, the protrusion
On the relative surface between the frame unit and the cover body.
Extend to near one surface of the cover so that they face each other.
Ri, distance between the tip and the cover member of the protrusions,
A magnetic head protection structure for a magnetic recording / reproducing apparatus is obtained, which is positioned at a distance smaller than a clearance between at least the cover body and the carrier unit .

Further, according to the present invention, the eject lever has a shaft portion rotatably supported by the frame unit and an arm portion extending from the shaft portion, and the protrusion portion is the arm. Integrated with the arm at the free end
Magnetic head protective structure of the magnetic recording and reproducing apparatus according to claim 1, characterized in that it is formed is obtained.

[0014]

[Function] When the cover body is subjected to a load by some external force and is bent inward (toward the receiving portion), the protrusion of the eject bar held by the frame unit hits the cover body before the carrier unit and the carrier unit To prevent damage to the magnetic head provided in the.

[0015]

1 and 2 show an embodiment of a magnetic head protection structure of a magnetic recording / reproducing apparatus of the present invention. In this embodiment, a magnetic disk body 40 similar to the magnetic disk body 40 shown in FIG. 3 will be described below.

Referring to the magnetic disk body shown in FIGS. 1, 2 and 3, the magnetic recording / reproducing apparatus has a plate-shaped frame unit 1 and a thin plate-shaped cover body 2 for covering the frame unit 1. is doing. The frame unit 1 and the cover body 2 are combined with each other to form a hollow receiving portion 3 surrounded by them. Reception part 3
The magnetic disk main body 40 is received in and the magnetic recording / reproduction of the access area (magnetic disk) 44 of the magnetic disk main body 40 is performed.

A front bezel 4 for guiding the magnetic disk body 40 to the receiving portion 3 in a correct posture is attached to the front portion of the receiving portion 3. The front bezel 4 is formed with a receiving port 4a. An eject plate 7 for positioning the magnetic disk body 40 inserted through the receiving port 4a so that its one surface faces the receiving portion 3.
A disk holder unit 8 that faces the surface opposite to the one surface of the magnetic disk body 40 and holds the magnetic disk body 40 at a predetermined position is provided.

Further, the receiving unit 3 is provided with the magnetic head 15 which faces the window 43 of the magnetic disk body 40 in which the shutter 41 is opened when the disc body 40 is positioned at a predetermined position. When,
The eject lever 10 is provided. The eject lever 10 includes a rotary shaft (shaft portion) 10a pivotally supported by the frame unit 1, an arm portion 10b extending from the rotary shaft 10a to one side, and a protrusion portion provided at a free end portion of the arm portion 10b. 10c and.

The eject lever 10 rotates about a rotary shaft 10a parallel to the surface of the frame knit 1. Also, the protrusion 10c is the frame unit 1.
And the cover body 2 extend so as to face each other.
The protrusion 10c extends to the vicinity of one surface of the cover body 2 and is set to have a smaller gap than the gap between the carrier unit 9 and the cover body 2. That is, the gap between the tip of the protrusion 10c and the cover body 2 is positioned at least smaller than the gap between the cover body 2 and the carrier unit 9.

Examples of the component to be held in the frame unit 1, as shown in FIG. 1, the eject lever 10 and cab
In addition to the rear unit 9, a disk table 19 provided with a magnet for rotating the magnetic disk 40,
Guide bar 1 for moving the carrier unit 9 back and forth
3. A guide bar clamp 11 for clamping the guide bar 13 and the like are attached. On the back surface of the frame unit 1, as a component of the magnetic recording / reproducing apparatus,
An index magnet (not shown), a rotor, a printed circuit board, etc. are provided.

The eject plate 7 is the front bezel 4
When the eject button 12 projecting on the outer surface of is pushed into the receiving portion 3, the eject lever 10 is moved a little rearward to rotate the eject lever 10.

The magnetic disk body 40 itself housed in the receiving portion 3 is locked by a lock mechanism (not shown) so that the magnetic disk body 40 does not pop out of the receiving portion 3. When the lock mechanism is unlocked in this state, the magnetic disk body 40 is moved from the receiving portion 3 to the receiving opening 4a of the front bezel 4 by the eject lever spring 13 which is a spring mechanism for urging the eject lever 10. It is ejected so that a part of it jumps out. The eject plate 7 is provided with eject springs 14a and 14b as a spring mechanism, and when the ejection button 12 is released, the eject plate 7 is returned to its original position by the spring mechanism. In this way, the magnetic disk body 40 can be pulled out from the receiving portion 3.

Since the eject lever 10 is biased counterclockwise by the spring mechanism, the magnetic disk body 40
The shutter 41 closes the window 43 in parallel with the discharge from the receiving section 3.

The magnetic recording / reproducing apparatus includes a carrier unit 9
Is held in the frame unit 1, and the carrier unit 9 is housed in the receiving portion 3 between the frame unit 1 and the cover body 2. That is, the frame unit 1 includes a component that constitutes an eject mechanism, a component that holds the magnetic disk body 40, and a carrier unit 9 that holds the magnetic head 15 provided on the carrier unit 9.
Etc. are attached. These parts are the cover body 2
The magnetic recording / reproducing apparatus is assembled by being covered with.

By the way, in the magnetic recording / reproducing apparatus, the carrier is
Holding the A unit 9 to the frame unit 1, the carrier
Since the unit 9 is housed in the receiving portion 3 between the frame unit 1 and the cover body 2, the cover body 2 may be bent inward by an external force (shown by a chain double-dashed line A in FIG. 2). Since the carrier unit 9 which is movable in the direction approaching the access area 44 of the magnetic disk 40 is pressed, the magnetic head 15 may be damaged. Therefore, the protrusion is provided at the free end of the arm portion 10b of the eject lever 10 is held in the frame unit 1 when the cover 2 is deflected takes weighted by an external force of several like 1
0c hits the cover member 2 before the carrier unit 9 prevents the cover member 2 hits the carrier unit 9.

[0026]

As described above, according to the magnetic head protection structure of the magnetic recording / reproducing apparatus of the present invention, the eject which is held by the frame unit when the cover body is bent by being applied with a load by some external force. Since the bar hits the cover body before the carrier unit, damage to the magnetic head can be prevented.

Further, since the protrusion of the eject lever can be formed integrally with the arm and the deflection of the cover body is received by the protrusion, it is not necessary to incorporate the deflection of the cover body as a separate component, and the number of components can be increased. There is an advantage that there is no.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an embodiment of a magnetic recording / reproducing apparatus of the present invention.

FIG. 2 is a schematic cross-sectional view showing the structure after assembly of FIG.

FIG. 3 is a magnetic disk body of a conventional magnetic recording / reproducing apparatus,
FIG. 6 is a plan view showing a positional relationship between an eject lever and a magnetic head.

FIG. 4 is a plan view showing a state in which the magnetic disk body of FIG. 3 is housed in a position where recording and reproduction are possible.

[Explanation of symbols]

1 frame unit 2 cover body 3 receiving section 4 front bezel 4a Receptacle 7 Eject plate 8 Disk holder unit 9,61 Carrier unit 10,50 eject lever 10a, 51 rotating shaft (shaft part) 10b arm part 10c, 52 protrusion 11 Guide bar clamp 12 eject button 13 Guide bar 14a, 14b eject spring 15,60 magnetic head 19 disk table 40 Magnetic disk body 41 shutter 42,43 windows 44 Access area (magnetic disk) 45 cutout

─────────────────────────────────────────────────── ─── Continuation of the front page (56) References: Kaihei 3-102142 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) G11B 17/04 411

Claims (2)

(57) [Claims] 1. A receiving unit for a magnetic disk, which includes a frame unit and a cover body attached to the frame unit, is surrounded by the frame unit and the cover body, and the magnetic disk is housed in the receiving unit. A magnetic recording / reproducing apparatus having a receiving unit provided with a carrier unit sometimes comprising a magnetic head facing the access area of the magnetic disk, and an eject lever for ejecting the magnetic disk from the receiving section, carrier unit and the eject lever, the is held in a frame unit, the eject lever has a projection which extends so as to face the cover member, said protrusion, said mosquito and the frame unit
One surface of the cover body so as to face the surface facing the bar body
The distance between the tip of the protruding portion and the cover body extends at least in the vicinity, and at least the distance between the cover body and the cover body is large.
A magnetic head protection structure for a magnetic recording / reproducing apparatus, characterized in that the magnetic head protection structure is positioned at a distance smaller than that of the rear unit . 2. The eject lever comprises a shaft portion rotatably supported by the frame unit, and a stretchable portion extending from the shaft portion.
And it has an arm portion, wherein the projection is a magnetic head protective structure of the magnetic recording and reproducing apparatus according to claim 1, characterized by being formed integrally with the arm portion at the free end of the arm portion .