JP2600241Y2 - Front structure of magnetic recording 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 recording apparatus such as a floppy disk drive, and more particularly, to a front structure of a magnetic recording apparatus which is miniaturized.

[0002]

2. Description of the Related Art Generally, a conventional magnetic recording apparatus using a cartridge-type magnetic medium such as a floppy disk,
For example, the front part of a 3.5-inch floppy disk drive has a structure as shown in FIGS. That is, the front portion a ₁ of the main chassis A to be formed into a flat "U" shape, but the front frame Frame C made of resin formed a disc insertion hole B is fixed to the central portion,
The front frame Frame C engages the clip c ₁ which is molded integrally with the rear sides in the hook hole a ₄ of the side walls a _2, a ₃ of the main chassis A, and in front a ₁ of the main chassis A
Are fitted into both sides c ₂ , c ₃ and the lower side c ₄ of the front frame frame C, whereby the front frame frame C is firmly fixed to the main chassis A.

[0003] Then, the back sides of the upper side portion c ₅ of the front frame frame C, the shaft support c ₆ which can press-fitting the support pin d ₁ of the front door D for closing the disk insertion hole B is formed integrally, coaxially by a return spring E fitting the branch c ₆ front door D is held in the normally closed position, forced to have押開the same front door D in the floppy disk X, the disk holder F, which is located at the back of the disc insertion hole B The structure is such that the floppy disk X can be mounted. Also, the lower side c ₄ of the front frame C
So that the eject button H is penetrating buttonhole c ₆ of LED element G and the lower portion c ₄ displays the operating state of the drive device is disposed on.

[0004]

In the above-mentioned 3.5-inch floppy disk drive, since it is incorporated in a band-type word processor or a personal computer which is required to be small and light, it is necessary to reduce the size. It is being requested. In this case, what is problematic in downsizing the front portion of the drive device is the horizontal dimension W ₁ , the height dimension H _1, and the depth dimension L ₁ of the drive device. These dimensions W ₁ , H ₁ , of L _1, in order to reduce the depth dimension L ₁ has the following problems.

That is, in the conventional front door D,
Split large vertical dimension h ₁ of the front door D to the disk insertion hole B, thus the need to ensure the opening stroke of the front door D, the opening stroke of the depth direction of the reduction in depth dimension L ₁ of the drive unit Is an obstacle.

SUMMARY OF THE INVENTION An object of the present invention is to provide a structure capable of reducing the depth dimension of a magnetic recording device in view of the above-described problem of downsizing the conventional magnetic recording device.

[0007]

Means for Solving the Problems] To achieve this object, the present invention is to secure the front frame frame made of resin formed a disc insertion hole in the front of the main chassis, before
In the front structure of a magnetic recording apparatus of the openable front door that covers the disc insertion hole on the rear side is pivotally supported at an upper position of the serial front frame frame, both of the main chassis
A door mounting hole is formed at the top of the front end of the side wall,
A pair of fulcrum pins are integrated on both sides of the upper edge of the door body.
The front door body is elastically bent
The fulcrum pin into the door mounting hole
More, the front door is pivotally supported, substantially in correspondence of the vertical dimension of the front door on the rear side opening dimension of the disk insertion hole, integrally molded stopper protrusions at the bottom of the front door to the upper position, It is proposed that this stopper protrusion be abutted on the back surface of the front frame frame and either the disk holder or the cam plate.

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of an embodiment of the present invention; FIG. FIG. 1 shows a 3.5-inch floppy disk drive according to the present invention in which the horizontal dimension W ₂ , the height dimension H ₂ and the depth dimension L ₂ are both smaller than those of the conventional magnetic recording apparatus. ing.

1 to 3, a disk holder 2 which is moved up and down by a vertically moving mechanism (not shown) is accommodated in a main chassis 1 formed into a flat "U" shape by a metal plate. When the disk holder 2 receives the floppy disk X, the disk drive 3 rotates the floppy disk X. In the drive device of the illustrated embodiment, as shown in FIG. 3, the upper portion of the disk holder 2 is covered by a cam plate 4 fixed to the front portions of both side walls 1a and 1b of the main chassis 1 with mounting screws 4a.

A front frame 6 formed by resin molding with a disk insertion hole 5 formed in the center is fixed to the front portion 1c of the main chassis 1 described above. That is, the steps formed on the lower side 6a and the rear sides of the both side parts 6b, 6c of the front frame frame 6 include the bottom wall 1d of the main chassis 1 and the front part 1 of the side walls 1a, 1b.
c is fitted into each of the main chassis 1 and the clip claws 6 e integrally formed on the back surfaces of the side portions 6 b and 6 c.
By engaging the hook holes 7 of both side walls 1a, 1b of
The entire front frame 6 is securely fixed to the main chassis 1.

Also, both side walls 1a, 1 of the main chassis 1
In the upper part of the front end of b, small door mounting holes 1e, 1f into which the left and right fulcrum pins 8a, 8b of the flexible front door 8, which will be described in detail later, can be inserted, are formed. 1f, the main body 8c of the front door 8
The corresponding fulcrum pins 8a, 8b can be inserted in a state in which is elastically bent. As can be understood from FIG. 3, the front door 8 is made of resin similarly to the front frame 6.
The vertical dimension h of the main body 8c is set to minimize the opening stroke at the time of opening and closing and to reduce the weight.
2 is substantially the same as the opening size on the back side of the disk insertion hole 5 of the main chassis 1. A pair of fulcrum pins 8a,
8b is integrally formed, and a mounting pin 8d capable of fitting a return spring 9 which gives the front door 8 a return behavior in the closing direction is integrally formed at a portion closest to the left fulcrum pin 8a.

As shown in FIG. 2, a stopper projection 10 which can abut against the back surface of the lower side 6a of the front frame 6 is integrally formed at the lower center of the main body 8c of the front door 8. Thus, as also substantially the same dimensions as the disc insertion hole 5 a vertical dimension h ₂ of the main body portion 8c, ensuring the closed position of the front door 8 by abutment of the lower edge portion 6a of the stopper projection 10 and the front frame Frame 6 it can. In addition,
The open position of the front door 8 is determined by the abutment of the stopper projection 10 against the cam plate 4, as understood from FIG.

In order to reduce the height dimension H ₂ of the front frame 6, a recess 11 whose upper side is open is formed in a portion near one side of the upper side 6 d of the front frame 6. An eject button 13 fixed to the front end of an eject lever 12 is disposed at 11 so as to be movable in the front-rear direction. More specifically, in the case of the illustrated embodiment, the recess 11 is used.
Vertical depth d ₁ of, from being substantially equal to the vertical thickness d ₂ of the eject button 13, in the state in which the front frame Frame 6 assembled with eject button 13, the upper surface of the eject button 13 is a front It is at the same level as the upper surface of the upper side 6d of the frame 6.

On the other hand, in order to prevent destruction or deformation of the upper side portion 6d of the front frame frame 6 having a small cross-sectional area due to external force, as shown in FIG. A plurality of rear projections 14 are integrally formed on the rear surface of the front frame 6, and these rear projections 1 are formed.
A plurality of upper edge cutouts 15 for receiving these rear projections 14 are formed in the upper edge 8e of the front door 8 corresponding to the front door 4. However, the rear projection for the upper edge 8e of the main body portion 8c of the upper edge notches 15 and to reduce the height of H ₂ front frame Frame 6 utmost front door 8 14
The upper edge notch 15 is not necessarily required because the purpose is to make the engagement position of the upper edge accurate.

Since the drive apparatus according to the illustrated embodiment has the above-described structure, the height dimension H ₂ and the depth dimension L ₂ can be reduced for the following reasons to reduce the size of the entire drive apparatus. Can be planned. That is, the height dimension H2
In the drive device of the illustrated embodiment, a shaft support for the front door 8 is not provided on the upper side 6d of the front frame 6 and the front door 8 is attached to both side walls 1a of the main chassis 1. , 1b in the door mounting holes 1e, 1f, the mechanical rigidity of the upper side 6d is not required, and the height of the upper side 6d is reduced to reduce the height H _{2 of the} drive device. Can be reduced. Of course, this structure is only partial abolition of the shaft support of the front frame frame 6, since it reduced the depth L ₂ of the drive device, it is possible to contribute to the depth reduction of the drive device.

The eject button 13 integrated with the eject lever 12 is located in the recess 11 formed in the upper side 6d of the front frame frame 6, so that the eject button 13 is conventionally formed in the lower side 6a of the front frame frame 6. abolished the buttonhole that has been, by reducing the height dimension of the lower portion 6a, it can reduce the overall height dimension of H ₂ front frame frame 6. The relationship between the eject button 13 and the recess 11 is determined from above the front frame 6 assembled on the main chassis 1 in advance.
There is an advantage that an assembling method in which the eject button 13 is positioned in the recess 11 can be adopted. After the eject button is positioned behind the button hole of the front frame 6 assembled in the main chassis 1 as in the related art, The assembly process is much simpler than a structure in which the button and the eject lever are moved forward to insert the eject button into the button hole.

Furthermore, because of the reduced height dimension H _2, the upper edge 8e of the front door 8 and the front frame Frame 6
The rear projection 14 of the upper side 6d also sufficiently contributes. That is, even if the front door 8 has a small thickness, the second moment of area in the vertical direction is considerably large, and the front door 8 is not easily deformed even when subjected to an external force in the vertical direction. When the portion 6d attempts to deform due to a bending moment due to an external force, the rear projection 14 of the upper side 6d abuts on the upper edge 8e of the front door 8, and the front door 8 prevents the upper side 6d from deforming. As a result, even in the case of the upper side portion 6d having a small cross-sectional area in which the height dimension of the upper side portion 6d is reduced, destruction or deformation due to external force can be prevented, and the height dimension H2 of the drive device if the front frame 6 is strong. Reduction and miniaturization are possible.

On the other hand, with respect to the depth dimension L ₂ of the drive device, the main body 8 of the short front door 8 having a vertical dimension h ₂ substantially equal to the rear opening dimension of the disc insertion hole 5.
c and the stopper projection 10 contribute. In other words, even if the main body 8c of the front door 8 is substantially the same as the opening size on the back side of the disc insertion hole 5, the closed position and the open position can be ensured by the presence of the stopper projection 10, so that the same inside the drive device. just to ensure a relief portion space for the stopper projection 10, it is not possible to reduce the depth dimension L ₂ of the drive device.

In the above description of the embodiment, when the front door 8 is opened, the stopper projection 10 of the front door 8 is brought into abutment with the cam plate 4, but this is shown in phantom lines in FIG. As described above, the front end upper wall 2a of the disc holder 2 may be extended toward the front frame 6, and the stopper projection 10 may be brought into contact with the upper wall 2a when the front door 8 is opened.

In the above embodiment, the present invention is applied to a 3.5-inch floppy disk drive, but the present invention can be applied to other magnetic recording devices until it is explained again. Nor.

[0021]

As is apparent from the above description, according to the present invention, a main body having a short vertical dimension approximately corresponding to the opening on the back side of the disk insertion hole formed in the front frame frame; Since the closed position and the open position of the front door are secured by the stopper projection integrally formed at the lower portion of the portion, the depth dimension of the magnetic recording device can be reduced, and the entire magnetic recording device can be downsized.

[Brief description of the drawings]

FIG. 1 is a perspective view of a 3.5-inch floppy disk drive according to the present invention.

FIG. 2 is an enlarged sectional view of a main part of the 3.5-inch floppy disk drive.

FIG. 3 is an enlarged exploded perspective view of a main part of the 3.5-inch floppy disk drive.

FIG. 4 is a perspective view of a conventional 3.5-inch floppy disk drive.

FIG. 5 is an enlarged sectional view of a main part of the 3.5-inch floppy disk drive.

[Explanation of symbols]

 X Floppy disk 1 Main chassis 1c Front 2 Disk holder 4 Cam plate 5 Disk insertion hole 6 Front frame 6d Upper side 8 Front door 8c Main body 10 Stopper protrusion

Continuation of the front page (56) References JP-A-2-128358 (JP, A) JP-A-63-135586 (JP, U) JP-A-56-162506 (JP, U) (58) Fields investigated (Int) .Cl. ⁶ , DB name) G11B 33/02 502 G11B 33/12 313

Claims (1)

(57) [Scope of request for utility model registration] 1. A resin front frame having a disc insertion hole formed therein is fixed to a front portion of a main chassis.
In the front structure of a magnetic recording apparatus of the openable front door that covers the disc insertion hole on the rear side is pivotally supported at an upper position of the serial front frame frame, both of the main chassis
A door mounting hole is formed at the top of the front end of the side wall,
A pair of fulcrum pins are integrated on both sides of the upper edge of the door body.
The front door body is elastically bent
The fulcrum pin into the door mounting hole
More, the front door is pivotally supported, substantially in correspondence of the vertical dimension of the front door on the rear side opening dimension of the disk insertion hole, integrally molded stopper protrusions at the bottom of the front door to the upper position, The front structure of the magnetic recording device, wherein the stopper projection is brought into contact with the rear surface of the front frame frame, either the disk holder or the cam plate.