JPH0950689A - Chassis structure for magnetic recorder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent influence of distortion upon a part required for positioning accuracy on a chassis by forming a deformation absorbing part between a part required for a high positioning accuracy and a device fitting part and intercepting and absorbing transmission of fitting distortion assordingly. SOLUTION: A side plate part 11a in the chassis structure is directly coupled with a system side fitting part 14. Then, for instance, when a dimension between fitting positions 16b and 16d is larger than a dimension between fitting positions 16b and 16c, the side plate part 11a of a chassis main body 11 is deformed to expand to the outside upon receipt of external force in the direction of S1. However, this distortion is absorbed by deforming a flat surface part of the chassis main body 11 so as to expand lefthandedly a slit edge 17a out of two slit edges 17a and 17b of a slit provided in a position adjacent to a deforming part of the distortion.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chassis structure of a magnetic recording device, and more particularly to a chassis structure of a magnetic recording device which has a simple structure and can improve the positional accuracy of mounting parts.

[0002]

2. Description of the Related Art Conventionally, a chassis structure of a magnetic recording apparatus, particularly, a function of attaching a recording head of the magnetic recording apparatus or positioning a magnetic recording medium (floppy disk or the like) to be inserted into the magnetic recording is provided. Various proposals have been made for the existing chassis structure. 9 to 12 show a first example of such a conventional chassis structure. Of these, FIG. 9 is a plan view of the chassis structure. In this figure, reference numeral 1 is a chassis structure main body (hereinafter referred to as a chassis main body) including a portion requiring a high degree of positional accuracy.
Is formed into a box-shaped structure having a side plate portion 1a formed by bending both side portions by a constant width and having a substantially U-shaped cross section. Further, in the chassis body 1, a hole 1A for mounting a medium positioning shaft having a function as a magnetic recording medium positioning portion and a magnetic recording head mounting portion 1 are provided.
B is provided. Reference numeral 2 denotes an attachment angle for attaching and fixing the chassis body 1 to a system (or an apparatus), which is connected to the side plate portion 1a of the chassis body 1 with a screw or a screw 5 to form a chassis structure. When attaching the mounting angle 2 to the chassis body 1, a damper 3 made of rubber or another elastic material is interposed between the side plate 1a of the chassis body 1 and the mounting angle 2 to attach the mounting angle 2 to the chassis body 1 and the mounting angle. When an external force is applied to the chassis 2, the displacement caused by the external force is absorbed to prevent the chassis body 1 from being distorted. At a predetermined position near the center of the mounting angle 2,
A screw hole 5e for attaching and fixing the chassis body 1 to the system is formed. In FIG. 9, reference numeral 9
Is a gate opening for molding the chassis.

FIG. 10 is a plan view for explaining a method of system-installing the chassis structure shown in FIG. To attach this chassis structure to the system, mounting positions 6a, 6b, 6 made up of mounting screw holes are used.
The system side mounting portion 4 provided with c and 6d is aligned with the screw hole 6e provided in the mounting angle of the chassis structure, and both mounting members 2 and 4 are joined by the screw 6. Incidentally, instead of the screw hole 6e, this hole 6e may also be a hole through which a screw passes, and the chassis structure may be attached by tightening the screw 6 with a nut.
Figure 1 shows the chassis structure attached to the system.
As shown in FIG. 1, the chassis structure is coupled to the system side mounting portion 4 via the damper 3. Therefore, the mounting positions 6a, 6b, 6c, 6 of the system side mounting portion 4 are
Due to the dimensional accuracy of d, for example, the mounting positions 6b and 6c
When the dimension between the mounting positions 6a and 6d is larger than the dimension between them, the mounting angle 2 on the left side in FIG. 11 of the mounting angles 2 mounted on both sides of the chassis body 1 is deformed and bulges outward. However, this distortion is absorbed by the damper 3 mounted at a position corresponding to the deformed portion of the mounting angle 2 as shown in FIG. 12 by expanding and deforming from the state shown in FIG. It Therefore, the portion of the chassis body 1 that requires a high degree of positional accuracy, such as the hole 1A for mounting the positioning shaft of the recording medium and the magnetic recording head mounting portion 1B, is not affected by this distortion.

FIGS. 13 to 16 show a second example of the conventional chassis structure, and are illustrated in substantially the same order as in the case of FIGS. 9 to 12. In the second conventional example, the side plate portion 1a of the chassis body 1 has two screw holes 6f for attaching the chassis structure to the system body.
The chassis-side mounting portion 8 is provided by forming a slit 7 having a substantially U shape in the side plate portion 1a so as to surround each screw hole 6f. Therefore, the side plate portion 1a of the chassis body 1 can elastically bend and deform toward the inside and the outside of the side plate portion 1a when an external force is applied to the portion of the screw hole 6f. Inside the chassis body 1, a hole 1A for mounting a medium positioning shaft having a function as a magnetic recording medium positioning portion and a magnetic recording head mounting portion 1B are provided as in the first conventional example.

In order to mount the chassis structure having such a structure on the system body, as shown in FIG. 14, the mounting angle 2 of the chassis structure is mounted and fixed to the system side mounting portion 4 with screws 6. At this time, the system side mounting part 4
When the dimension between the mounting positions 6a and 6d is larger than the dimension between the mounting positions 6b and 6c due to the dimensional accuracy of the mounting positions 6a, 6b, 6c and 6d, the both side plate portions of the chassis body 1 are The side plate portion 1a on the left side in FIG. 15 of 1a tends to be deformed by the outward pulling action. However, this strain is absorbed by the chassis side mounting portion 8 including the screw hole 6f at the lower left of FIG. 15 being deformed and flexed outward as shown in FIG. Therefore, the chassis body 1
The portion in which a high degree of positional accuracy is required, for example, the hole 1A in which the positioning shaft of the recording medium is mounted and the magnetic recording head mounting portion 1B are not affected by this distortion.

[0006]

However, in such a conventional magnetic recording device chassis structure, the damper 3 must be used in the first conventional example, and the number of parts is increased. There is a risk. Further, since the mounting angle 2 is fixed to the system side mounting portion 4 via the damper 3 which is easily deformed, there is a problem that the positional accuracy of the mounting portion itself cannot be set strictly.

In the second conventional example, since the mounting portion 8 provided on the chassis side is weakened by the slit 7, this portion is affected by an external force such as an impact applied in a state of being attached to the system. However, there is a problem that the position of the mounting portion 8 is displaced due to deformation, or the mounting portion 8 hits another component. Also, when the chassis structure of the second conventional example is made with a molded product such as die casting or resin,
There is also a problem that the bag-shaped slit 7 hinders the flow of the material and easily causes defective molding.

The present invention has been made in view of the above problems. A first object of the present invention is that the number of parts is small, the positional accuracy of the mounting portion can be maintained at a high level, and deformation due to impact or the like can be prevented. It is an object of the present invention to provide a chassis structure of a magnetic recording device that is hard to do.

A second object of the present invention is to integrate a chassis with a mounting portion without causing molding problems or mounting problems even if the model is a chassis using a molded product such as die casting or resin. It is an object of the present invention to provide a chassis structure of a magnetic recording device that can be realized.

[0010]

In order to solve the above-mentioned problems, the chassis structure of the magnetic recording apparatus of the present invention is modified between a portion in the chassis body which requires a high degree of positional accuracy and an apparatus mounting portion. The gist of the present invention is to form an absorbing portion so as to cut off and absorb the transmission of the mounting strain generated in the device mounting portion to a portion requiring high positional accuracy. As the deformation absorbing portion, there are a plurality of slits provided on the flat surface portion of the chassis, or a plurality of accordion structure deformation absorbing portions provided on the same portion. Further, by arranging the slits in the direction of the gate opening, it is possible to prevent defects around the hot water during molding.

[0011]

Therefore, according to the chassis structure of the magnetic recording apparatus of the present invention, the distortion generated in the chassis when the system is mounted is absorbed by the deformation of the slit or the accordion portion itself provided between the chassis and the chassis. It is possible to prevent the influence of the distortion on the portion requiring the positional accuracy of. Further, in the present invention, since the slit can be arranged in the direction of the gate opening, it is possible to prevent a defective hot water supply.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A chassis structure of a magnetic recording device according to an embodiment of the present invention will be described below with reference to the drawings. FIG.
4 to FIG. 4 are views showing the first embodiment of the chassis structure of the magnetic recording apparatus used in the present invention. Of these drawings, FIG. 1A is a plan view of the chassis structure of this embodiment, and FIG. 1B is a side view of the chassis structure of this embodiment.

In FIG. 1, reference numeral 11 is a chassis structure main body (hereinafter referred to as a chassis main body) including a portion which requires a high degree of positional accuracy. Both sides of the chassis main body 11 are bent by a certain width. Side plate part 11
It is formed in a box-shaped structure having a substantially U-shaped cross section having a.
Further, in the plane portion of the chassis main body 11, there are provided a hole 11A for mounting a positioning shaft for a medium having a function as a positioning portion for the magnetic recording medium and a magnetic recording head mounting portion 11B. Further, the hole 11A and the magnetic recording head mounting portion 11B of this flat surface portion
A plurality of slits 17 serving as deformation absorbing portions are formed around the circumference of. Each of the slits 17 is arranged on the chassis body 11 so as to extend substantially in the direction of the gate opening 19 (later described). Further, in the first embodiment, the side plate portion 11a of the chassis body 11 has screw holes 1 for attaching the chassis structure to the system body.
Two 6e each are provided to serve as a chassis side mounting portion for mounting the chassis structure to the system. In FIG. 1, reference numeral 19 is a gate opening for molding the chassis.

FIG. 2 is a plan view illustrating a method of attaching the chassis structure shown in FIG. 1 to a system. In order to mount this chassis structure on the system, mounting positions 16a, 16b, which are constituted by screw holes for mounting,
A method is adopted in which a screw hole 16e, which is a chassis-side mounting portion, is aligned with the system-side mounting portion 14 provided with 16c and 16d, and both mounting portions are connected by a screw 16. In place of the screw hole 16e, this hole 16e may also be a hole through which a screw passes, and the chassis structure may be attached by tightening the screw 16 with a nut.

The state in which the chassis structure is attached to the system is as shown in FIG. 3, and the side plate portion 11a of the chassis structure is directly connected to the system side attaching portion 14. Therefore, due to the dimensional accuracy of the mounting positions 16a, 16b, 16c, 16d of the system side mounting portion 14,
For example, when the dimension between the mounting positions 16a and 16d is larger than the dimension between the mounting positions 16b and 16c,
The side plate portion 11a on the left side in FIG. 3 of the chassis body 11 receives an external force in the direction of S1 in the figure, is deformed, and bulges outward. However, this distortion is caused by the two slit edges 17 of the slits provided at the position close to this deformed portion as shown in FIGS. 3 and 4.
Of the a and 17b, the slit edge 17a is absorbed by being deformed by the flat surface portion of the chassis body 11 so as to bulge to the left. Therefore, the chassis body 1
This distortion does not affect a portion of the magnetic recording head 1 where high positional accuracy is required, for example, the hole 11A where the positioning shaft of the recording medium is attached and the magnetic recording head attaching portion 11B.

FIGS. 5 to 8 are views showing a second embodiment of the chassis structure of the magnetic recording apparatus used in the present invention. Of these, FIG. 5A is a plan view of the chassis structure of the second embodiment, and FIG. 5B is a side view of the chassis structure of the present embodiment. In these drawings, the basic structure of the chassis body 11a is the same as that of the chassis body in the first embodiment. And this chassis body 11
Outside the hole 11A and the magnetic recording head mounting portion 11B in which the positioning shaft of the medium having a function as the positioning portion of the magnetic recording medium is mounted in the plane portion of
That is, the accordion portion 20 as a deformation absorbing portion is formed between the hole 11A and the mounting portion 11B and both side edges of the chassis body 11. As shown in FIG. 8 (a), these accordion parts 20 have a substantially mountain-shaped (or inverted V-shaped) cross-sectional structure, and when an external force in the lateral direction is applied to the lower end of this mountain, the legs are easily legged. Has a structure that opens and deforms. Further, these accordion portions 20 are arranged on the chassis body 11 so as to extend substantially from one end to the other end in the direction of the gate opening 19. Further, also in the second embodiment, the side plate portion 11a of the chassis body 11 is similar to the first embodiment.
In addition, two screw holes 16e for attaching the chassis structure to the system body are provided, respectively, to provide a chassis side attachment portion for attaching the chassis structure to the system.

FIG. 6 is a plan view for explaining a method for mounting the chassis structure shown in FIG. 5 on the system. The procedure for attaching this chassis structure to the system is the same as that in the first embodiment, and the attachment positions 16a, 16b, 16c, 16d formed by the screw holes for attachment are formed.
The system side mounting portion 14 provided with is aligned with the screw hole 16e which is the chassis side mounting portion, and both mounting portions are coupled by the screw 16. The state in which the chassis structure is attached to the system is as shown in FIG. 3, and the chassis structure is
The side plate portion 11a is directly coupled to the system side mounting portion 14. Therefore, due to the dimensional accuracy of the mounting positions 16a, 16b, 16c, 16d of the system side mounting portion 14, for example, when the dimension between the mounting positions 16a, 16d is larger than the dimension between the mounting positions 16b, 16c. The side plate portion 11a on the left side in FIG. 7 of the chassis body 11 receives an external force in the direction of S2 in the figure, is deformed, and is displaced outward.
However, this distortion is caused by the two legs 2 of the accordion portion 20 (that is, the accordion portion on the left side in FIG. 7) provided at a position close to the deformed portion as shown in FIGS. 7 and 8.
Of 0a and 20b, the leg 20a spreads and deforms leftward and is absorbed. Therefore, a portion of the chassis body 11 that requires a high degree of positional accuracy, such as the hole 11 to which the positioning shaft of the recording medium is attached
A and the magnetic recording head mounting portion 11B are not affected by this distortion.

[0018]

As described above, according to the present invention,
In the chassis structure of the magnetic recording device, a deformation absorbing part is formed between the part of the chassis body that requires a high degree of positional accuracy and the device mounting part, and a high degree of positional accuracy of the mounting distortion generated in the device mounting part Since the transmission to the required part is blocked and absorbed, the strain generated in the chassis when the system is installed will be absorbed by the deformation of the slit or the accordion part itself provided on the chassis. It is possible to prevent the influence of the distortion on the portion requiring the positional accuracy of. Further, in the present invention, since the slit can be arranged in the direction of the gate opening, it is possible to prevent a defective hot water supply.

[Brief description of drawings]

FIG. 1A is a plan view of a chassis structure according to a first embodiment of the present invention. FIG. 1B is a side view of a chassis structure according to a first embodiment of the present invention.

FIG. 2 is a plan view illustrating a method of mounting the chassis structure shown in FIG. 1 in a system.

FIG. 3 is a plan view showing a state in which the chassis structure is system mounted in the embodiment.

FIG. 4 is a partially enlarged plan view of a portion C in FIG. 3 for explaining absorption of strain when deformation occurs due to dimensional accuracy when the chassis structure is attached to the system in the embodiment.

5A is a plan view of a chassis structure according to a second embodiment of the present invention, and FIG. 5B is a side view of a chassis structure according to a second embodiment of the present invention.

FIG. 6 is a plan view illustrating a method for mounting the chassis structure shown in FIG. 5 in a system.

FIG. 7 is a plan view showing a state in which the chassis structure is system-attached in the second embodiment.

8A is a partial cross-sectional view taken along the line DD in FIG. 7 showing the structure (before deformation) of the accordion portion used in the second embodiment. FIG. 8B is the accordion used in the second embodiment. 7 is a partial cross-sectional view taken along line DD in FIG. 7 showing the structure (after deformation) of the portion.

9A is a plan view of a chassis structure of a first conventional example, and FIG. 9B is a side view of a chassis structure of a first conventional example.

FIG. 10 is a plan view illustrating a method for mounting the chassis structure shown in FIG. 9 in a system.

FIG. 11 is a plan view showing a state in which the chassis structure is system-attached in the first conventional example.

FIG. 12 (a) is an enlarged sectional view of a portion A in FIG. 11 showing a structure (before deformation) of a damper used in the first conventional example. (B) Structure of a damper used in the first conventional example. FIG. 11 is an enlarged cross-sectional view of a portion A in FIG. 11 (after deformation).

13A is a plan view of a chassis structure of a second conventional example, and FIG. 13B is a side view of a chassis structure of a second conventional example.

14 is a plan view illustrating a method for mounting the chassis structure shown in FIG. 13 in a system.

FIG. 15 is a plan view showing a state in which the chassis structure is system-attached in the second conventional example.

FIG. 16 is an enlarged perspective view of a portion B in FIG. 15 showing a deformed state of the chassis side mounting portion used in the second conventional example.

[Explanation of symbols]

11 chassis body 11a side plate portion 11A mounting hole 11B magnetic recording head mounting portion 14 system side mounting portion 16 screw 16a, 16b, 16c, 16d chassis structure / system mounting position 17 slit (deformation absorbing portion) 19 gate opening 20 accordion portion (Deformation absorption part)

Claims (4)

[Claims] 1. A magnetic recording device having a chassis main body, a magnetic recording medium positioning part, a magnetic recording head mounting part, and the like, which are required to have high positional accuracy, and the magnetic recording device itself is mounted to an external system. And a device mounting portion is provided for this purpose, and a deformation absorbing portion is formed between the device mounting portion and a portion of the chassis body that requires a high degree of positional accuracy. A magnetic recording device chassis structure characterized by blocking and absorbing transmission to a portion requiring high positional accuracy. 2. The magnetic device according to claim 1, wherein the deformation absorbing portion is a slit that blocks and absorbs the transmission of the mounting strain generated in the device mounting portion to a portion requiring a high degree of positional accuracy. Recording device chassis structure. 3. The chassis structure of a magnetic recording apparatus according to claim 2, wherein the slit is arranged on the chassis body so as to extend substantially in the direction of the gate opening. 4. A deformation absorbing part having an accordion structure is provided in place of the slit in order to cut off and absorb the transmission of the mounting strain generated in the device mounting part to a portion requiring high positional accuracy. The chassis structure of the magnetic recording apparatus according to claim 1.