JPH0810906Y2 - Recording / playback device mounting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a mounting device for a recording / reproducing device, which is optimal for mounting a floppy disk device to an OA equipment or the like.

[Outline of device]

The present invention, when installing a recording / reproducing device such as a floppy disk device to a mounting frame of an OA device or the like, a shield cover having a substantially U-shape is screwed to a chassis that is also U-shape with the upper side opened. By covering the upper part of the chassis and screwing the mounting frame to the shield cover, the chassis can be prevented from being deformed due to these mountings, and the structure can be simplified. .

[Conventional technology]

Conventionally, when mounting a floppy disk device to an OA equipment mounting frame, the chassis of the floppy disk device was screwed directly to the mounting frame, so the chassis is distorted or twisted due to the tightening force when screwing. It was easy.

If the chassis is deformed, the head and turntable of the floppy disk device, which are positioned with high accuracy, may be misaligned or tilted, causing misalignment of these heads, causing problems such as head off-track and offset. If it occurs, the compatibility will be adversely affected, for example, high-density recording and reproduction cannot be performed.

Therefore, the applicant of the present invention has a prior application example in which the chassis of the floppy disk device is screwed to an intermediate frame, which is a dedicated member for mounting, and the intermediate frame is screwed to the mounting frame of the OA equipment. No. 61-152372) was filed first.

[Problems to be solved by the device]

According to this prior application example, since the tightening force at the time of screwing can be absorbed by the intermediate frame, it is possible to prevent deformation such as distortion and twist of the chassis.

However, since the intermediate frame is used as a member exclusively for mounting, the number of parts and the number of assembling steps are large, and the large space for the intermediate frame requires a large mounting space for OA equipment. was there.

It is an object of the present invention to provide a mounting device for a recording / reproducing device, which can prevent deformation such as distortion and twist of the chassis without using a dedicated mounting member.

[Means for solving the problem]

In order to achieve the above-mentioned object, the mounting device of the recording / reproducing apparatus of the present invention has an open upper part so that at least the recording / reproducing unit of the recording medium can be mounted on the upper part of the recording / reproducing unit by screws from above. A recording / reproducing apparatus chassis, a shield cover having a U-shaped cross section with an open bottom, and a mounting frame, and a first screwing portion screwed to the lower portion of the chassis, A second screw fastening portion screwed to the mounting frame is integrally provided on the pair of side plates of the shield cover, and the first screw fastening portion of the shield cover is screwed to the lower portion of the chassis from below to record the data. The reproducing unit is covered with the shield cover, and the second screw fastening portion of the shield cover is screwed to the mounting frame.

[Action]

In the mounting device configured as described above, the shield cover that shields the external magnetic field also serves as the intermediate frame of the prior application example, and it is not necessary to use a dedicated mounting member.
Further, since the chassis is screwed to the mounting frame via the shield cover, the shield cover can absorb the distortion, twist, etc. at the time of screwing, and the chassis is not distorted or twisted. Moreover, at the bottom of the chassis where the recording / playback unit of the recording medium is screwed to the top,
Since the first screw fastening portion of the shield cover is configured to be screwed from below, it is possible to achieve the unification of the tapping surfaces of the many female screw holes to be machined in the chassis.

Further, in the mounting device configured as described above, the work of mounting the recording / reproducing unit of the recording medium on the upper part of the chassis becomes extremely easy, the cost of parts can be reduced, and the maintenance becomes easy.

〔Example〕

An embodiment of a device for attaching a floppy disk device to an OA device to which the present invention is applied will be described below with reference to the drawings.

First, a chassis 2 of a floppy disk device 1, which is an example of a recording / reproducing device, is made of aluminum die-cast, sheet metal or the like, and its upper part is open and has a U-shaped cross section. A front panel 4 formed of synthetic resin or the like and provided with a cartridge insertion port 3 is fixed to the front end of the chassis 2. And the upper surface 2a of the chassis 2
On the upper side, a spindle 5, a turntable 6, a head assembly 8 having a pair of upper and lower magnetic heads 7, a stepping motor 9 for reciprocally driving the head assembly 8 and a motor block 11 to which a lead screw 10 is attached,
A guide shaft 12 for guiding the head assembly 8 and the like are attached. In addition, below the lower surface 2b of the chassis 2, a spindle motor 13, a stepping motor 9, and a spindle motor 13 that rotate and drive the spindle 5 and the turntable 6.
The printed circuit board 14 and the like on which the drive control circuit and the like are mounted are attached.

The motor block 11, the guide shaft 12, the printed circuit board 14 and the like are provided above and below the chassis 2 by a plurality of screws 18, 19 and 20, respectively, in a plurality of female screw holes 15, 16 and 17 provided in the chassis 2. It is screwed from. The head assembly 8 is mounted on the upper surface 2a of the chassis 2 by the motor block 11 and the guide shaft 12 screwed on the upper surface 2a of the chassis 2 in this way, and the recording / reproducing unit 21 is constituted by these.

Then, the disk cartridge 23 is inserted into the upper part of the chassis 2 from the cartridge insertion slot 3, and the floppy disk 24 which is a recording medium rotatably housed therein is horizontally mounted on the spindle 5 and the turntable 6. This floppy disk 24 is a spindle motor
It is driven to rotate at high speed by 13. Then, the head assembly 8 is reciprocally driven along the guide shaft 12 in the direction of arrow a by the stepping motor 9 and the lead screw 10 which are the recording / reproducing unit 21, and the floppy disk 24 is scanned in the radial direction by the pair of upper and lower magnetic heads 7. The floppy disk 24 is configured to be recorded and reproduced.

The shield cover 27 that is attached to the chassis 2 so as to cover the upper portion of the floppy disk device 1 and shields the external magnetic field is formed by pressing a metal plate such as an aluminum plate.
27 has a top plate 28, a pair of left and right side plates 29, 30 formed into a substantially U-shaped cross section, and further has a back plate 31 and the like integrally.

The mounting device for mounting the floppy disk device 1 on the mounting frame 34 of an OA device (not shown) or the like is such that the side plates 28 and 29 of the shield cover 27 are screwed to the chassis 2 of the floppy disk device 1 at a total of three places. The shield cover 27 is configured to be screwed to the mounting frame 34 at a plurality of places. At this time, the mounting frame 34
Two types are used, one with a pair of left and right side plates 35, 36 and one with only the bottom plate 37. Both side plates 35, 36 are shielded.
Two methods are selectively used: a side fixing method in which both side plates 29 and 30 of 27 are laterally screwed, and a bottom fixing method in which the bottom plate 37 is screwed to both side plates 29 and 30 from below.

 Next, details of each screw fastening portion will be described.

First, the first screw-fastening portions 40 are provided at a total of three places, that is, two places on the lower end side of one side plate 29 of the shield cover 27, and one place on the lower end side of the other side plate 30 in the approximately central portion in the front-rear direction. ing. Each of these screw fastening portions 40 is provided with a screw insertion hole 42 penetrating in the vertical direction in a protruding piece 41 that is cut and raised horizontally inside both side plates 29 and 30. Further, the second screw-fastening portions 43 are provided at a total of four locations on the both side plates 29 and 30 of the shield cover 27, which are two locations before and after the three first screw-fastening portions 40.
Is provided. These second screw fastening portions 43 are provided on both side plates.
Four female screw holes 45 vertically penetrated by four projecting pieces 44 horizontally bent inward from the lower edges of 29 and 30, and four horizontally penetrated lower edges of both side plates 29 and 30. And two female screw holes 46.

Next, the shield cover 27 is attached to the floppy disk device 1
1 is slidably fitted to the outside of the chassis 2 in the direction of arrow b in FIG.
Chassis 2 in the space surrounded by 29, 30 and three protrusions 41
To be inserted relatively. And the three first screw fastening parts
Three screws vertically inserted from below into the screw insertion holes 42 of 40
The shield cover 27 is screwed to the chassis 2 at three points by screwing 47 into the three female screw holes 48 provided in the chassis 2 from below. The shield cover 27 is screwed to the chassis 2 so that the top plate 28 of the shield cover 2,
Both side plates of the chassis 2 by the both side plates 29, 30 and the back plate 31
2c is fixed by being pushed in from above, both left and right sides and rear.

Next, in the case of the bottom fixing method, as shown by a solid line, four screws 50 vertically inserted from below into four screw insertion holes 49 provided at four corners of the bottom plate 37 of the mounting frame 34 are shielded. 27 are screwed from below into the four female screw holes 45 of the four second screw fastening portions 43.

Further, in the case of the side surface fixing method, as shown by the alternate long and short dash line, a total of 4 provided on both side plates 35 and 36 of the mounting frame 34
The four screws 52 horizontally inserted from the one screw insertion hole 51 are screwed into the four female screw holes 46 of the four second screw fastening portions 43 of the shield cover 27.

As described above, according to this mounting device, since the chassis 2 is screwed to the mounting frame 34 via the shield cover 27, the shield cover 27 can absorb distortion, twist, and the like when screwing. The chassis 2 is not distorted or twisted. Moreover, in particular, 3 of the shield cover 27
Since the three-point support method in which the points are screwed to the chassis 2 with three screws 47 is adopted, when the shield cover 27 is screwed to the chassis 2 with the screw 47 and the shield cover 27 is screwed to the mounting frame 34 with the screw 50 or 52. Even if the shield cover 27 is distorted or twisted when screwed with, the chassis 2
Therefore, the chassis 2 is not distorted or twisted. Therefore, the alignment of the spindle 5, the turntable 6, the magnetic head 7, etc. of the floppy disk device 1 will not be misaligned at all, and the off-track and offset of the magnetic head 7 can be prevented in advance.
High-density recording and playback of the floppy disk 24 can be performed.

Furthermore, the recording / reproducing unit 21 of the floppy disk 24 which is a recording medium is screwed onto the upper surface 2a,
Since the first screwing portion 40 of the shield cover 27 is screwed from below to the lower surface 2b of the chassis 2 in which 14 is screwed to the lower surface 2b, the recording / reproducing unit 21, Printed circuit board 14 and shield cover 27
A large number of female screws 15, 16, 17 and 48 for screwing each of them with the respective screws 18, 19, 20 and 47 may be processed only in one direction which is the vertical direction. Accordingly, the tapping surfaces (tap surfaces) of the large number of female screw holes 15, 16, 17 and 48 to be machined in the chassis 2 can be unified, and thus the large number of female screw holes 15, 16, 17 and 48 can be formed. Can be easily processed into the chassis 2 at the same time, and the processing cost of the chassis 2 can be significantly reduced.

Also, when attaching the shield cover 27 to the chassis 2,
Since the shield cover 27 can be easily slid and fitted to the chassis 2 from the direction of the arrow b in FIG. 1, the both side plates 29 and 30 of the shield cover 27 are forced to open to the left and right sides against the elasticity. Without doing so, the shield cover 27 can be easily attached to the chassis 2 and the workability is very good.

Further, when the shield cover 27 is screwed to the chassis 2, the left and right side plates 2c of the chassis 2 are moved upward by the top plate 28, the side plates 29, 30 and the rear plate 31 of the shield cover 27,
Since it can be pressed and fixed from both left and right sides and from the rear, the characteristics against vibration and shock can be improved.

The embodiments of the present invention have been described above, but the present invention is not limited to the above embodiments, and various effective modifications can be made based on the technical idea of the present invention.

Further, the present invention is not limited to the mounting device of the floppy disk device, but can be applied to the mounting device of various recording / reproducing devices.

[Effects of the Invention] Since the present invention is configured as described above, the following effects can be obtained.

Since the shield cover also serves as the intermediate frame of the previous application and it is not necessary to use a member dedicated to mounting, the number of parts and the number of assembling steps are small, and the structure can be simplified and the cost can be reduced.

Since a member dedicated to mounting such as the intermediate frame of the prior application is not used, the mounting space can be reduced and the space can be saved.

By screwing the chassis to the mounting frame via the shield cover, the shield cover absorbs the distortion and twist when screwing, so that the chassis is not distorted or twisted. Alignment of the head, turntable, etc. of the reproducing device does not occur, head off-track, offset, etc. can be prevented in advance, high-density recording and reproducing can be performed, and compatibility is improved.

Still, the first part of the shield cover is attached to the lower part of the chassis where the recording / reproducing unit of the recording medium is screwed to the upper part.
Since the screwing part is configured to be screwed from below, and a large number of female screw holes to be machined in the chassis have been made into a single threaded surface, it is possible to easily machine a large number of female screw holes at the same time. Therefore, the processing cost of the chassis can be significantly reduced.

Further, in the present invention, the chassis having an open upper side and a U-shaped cross section is directly attached to the shield cover, and the recording / reproducing unit and the like attached to the upper part of the chassis are covered with the shield cover. Therefore, the work of attaching / detaching the recording / reproducing unit and the like can be performed simply by removing the shield cover. Moreover, since the upper part of the chassis is open, the above work can be performed very easily. Therefore, the present invention
It greatly contributes to the reduction of chassis component costs and the improvement of ease of maintenance.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention, FIG. 1 is an exploded perspective view of the whole, and FIG.
FIG. 3 is a plan view taken along the line III-III in FIG. In the reference numerals used in the drawings, 1 ... Floppy disk device (recording / playback device) 2 ... Chassis 2a ... Top (upper) 2b ... Bottom (lower) 18 ... Screw 19 ... Screw 21 ... Recording / playback Unit 24 …… Floppy disk (recording medium) 27 …… Shield cover 28 …… Top plate 29 …… Side plate 30 …… Side plate 34 …… Mounting frame 40 …… First screw stop 43 …… Second screw stop 47 …… Screw 50 …… Screw 51 …… Screw.

Claims (1)

[Scope of utility model registration request] 1. A chassis of a recording / reproducing apparatus having a U-shaped cross section and an opening below the recording / reproducing unit of a recording medium so that the recording / reproducing unit can be attached to the upper portion of the recording / reproducing unit from above by screws. A shield cover having a U-shaped cross section and a mounting frame, and a first screwing portion screwed to the lower portion of the chassis and a second screwing portion screwed to the mounting frame. The shield cover is integrally provided on a pair of side plates, and the first screw fastening portion of the shield cover is screwed to the lower portion of the chassis from below to cover the recording / reproducing unit with the shield cover. A mounting device for a recording / reproducing device, in which the second screw-fastening part of is fixed to the mounting frame.