JPH0516115B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a disk cartridge in which a case main body is formed by combining two upper and lower cases.

Generally, in this type of cartridge, it is necessary to perform a magnetic disk dropout detection test in a substantially completed state. In response to this, conventionally, the upper case and the lower case are completely bonded together using ultrasonic welding means or the like, and then subjected to the above-mentioned dropout detection test.

However, since the upper case and lower case of those that are judged to have failed the above test are completely bonded together, they have no choice but to be disposed of together with the defective magnetic disk and both cases, thus saving resources. Not only is this going against the grain, but manufacturing costs are also forced to rise.

Therefore, in the present invention, the upper and lower cases are temporarily joined together, a dropout detection test is performed, and then both the upper and lower cases are completely joined together.
It is an object of the present invention to provide a method for manufacturing a disk cartridge that can contribute to improved productivity.

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows an example of a disk cartridge of the present invention.

In the figure, 1 is a case body made of synthetic resin, and this case body 1 is divided into two upper case 2.
and lower case 3. These upper and lower cases 2 and 3 are joined together by, for example, ultrasonic welding means, with their peripheral walls 4 and 5 abutted against each other. Reference numerals 6 and 7 indicate a plurality of welded parts for joining provided on the peripheral walls 4 and 5 of the upper and lower cases 2 and 3. For example, the welded part 7 of the lower case 3 is composed of pin-shaped projections, and The corresponding fused portion 6 of the upper case 2 is constituted by a recessed portion.

Near the front of the case body 1, through holes 9, 9 are formed in the upper and lower cases 2, 3 so as not to prevent the entry of a drive shaft (not shown) of a recording/reproducing device (not shown). 10 is a sheet-shaped magnetic disk located concentrically with the through hole 9 and housed in the case body 1; 11 and 12 are a pair of upper and lower hubs made of synthetic resin, which are joined to each other to generate the magnetic disk; disk 1
0, and is rotatably fitted into the through hole 9. 13 is a drive shaft insertion hole formed in the lower hub 12.

Reference numerals 14 and 15 are magnetic head insertion windows located on the front side of the case body 1 (right side in FIG. 1) and formed in the disk setting area, and are located in the radial direction of the disk 10 (direction of arrow a in FIG. 1). It is composed of a long hole that does not impede the movement of the magnetic head H. 16 and 17 are annular walls formed concentrically with each drive shaft penetration hole 9 in the upper and lower cases 2 and 3;
Shutter members 8 and 19 open and close the magnetic head insertion windows 14 and 15 in the upper and lower cases 2 and 3, respectively. These shutter members 18,1
9 is designed to be externally operated via a slider (not shown).

On the front sides of the upper and lower cases 2 and 3, first and second rings are press-fitted to each other as shown in FIG. Concave and convex portions 20 and 21 constituting positioning means 2 are respectively formed.

22 and 23 are on the rear side of the case body 1,
These are third positioning recesses and protrusions formed on the upper and lower cases 2 and 3 and press-fitted to each other.

Next, a method of manufacturing the disk cartridge having the above structure will be explained.

First, the shutter members 18, 19 are fitted into the annular walls 16, 17 of both the upper and lower cases 2, 3 to prevent them from coming off.
and a slider for moving and operating the shutter member from the outside.

On the other hand, the magnetic disk 10 is connected to a pair of upper and lower hubs 1.
1 and 12, and then fit and install this hub block into the inner edge of the through hole of the lower case 3.

Next, the first and second positioning concave and convex portions 20 (20) and 21 (21) are press-fitted, and the third concave and convex portions 22 and 23 are press-fitted to form both the upper and lower positions. Position cases 2 and 3 relative to each other. Furthermore, as shown in FIG.
Attach a U-shaped clip 40 to 1 and 42,
That is, the opposing piece 40 of the clip 40 is attached to the inner wall surface 41a in the front-rear direction (arrow a direction) and the inner wall surface 41b in the left-right direction (arrow b direction) of the recesses 41 and 42.
0,401 each front edge 40a and side edge 40b
Temporarily connect both the upper and lower cases by attaching them so that they butt against each other. Next, a dropout detection test is performed on the magnetic disk 10 in this state.

Those that are determined to pass the dropout detection test are directly sent to the case merging process. In other words, in the merging process, both upper and lower cases 2,
Upper case 2
While pressing the lower case 3, ultrasonic waves are applied, thereby welding the welded parts 6 and 7 together. Of course, the merging means is not limited to the fusion means.

On the other hand, if the dropout detection test is judged to have failed, release the temporary connection between the upper and lower cases 2 and 3, replace only the magnetic disk 10, and submit to the test again. The case is sent to the case merging process described above. In other words, by performing the dropout detection test with both the upper and lower cases 2 and 3 temporarily connected, there is no need to immediately discard the entire case even if it is determined that the case has failed, thereby increasing productivity.

In this case, the U-shaped clip 40 attached to both the upper and lower cases is not necessarily attached to the rear part of both the upper and lower cases.
It does not need to be attached to the label attachment recesses 41 and 42 in b, and may be attached to the front parts of both the upper and lower cases, and there is no need for it to be a recess. However, when a U-shaped clip is attached to the recess, it is preferable because the U-shaped clip does not protrude much from the outer surface of the case, and loading into the dropout detection device becomes smooth.

Furthermore, the disks stored in the disk cartridge are not limited to the magnetic disks described in the above embodiments, but may be optical disks.

As described above, in this invention, there are two
In the manufacturing method of a disk cartridge, in which a case body is formed by combining divided cases and a disk is rotatably housed in this case, the disk is rotatably housed in one of the upper and lower halves of the case. Next, the upper and lower cases were positioned relative to each other, and a U-shaped clip was attached to the outer surface of the case to temporarily connect them.The upper and lower cases were then completely connected and integrated, so that both the upper and lower cases could be connected with the clip attached. The case can be reliably positioned in the front-back direction, and a dropout detection test can be performed appropriately.

Furthermore, before completely bonding both the upper and lower cases, we performed a dropout detection test after temporarily bonding the upper and lower cases, and even if the cases passed, we were able to completely bond only the upper and lower cases, so there was no need to discard defective disks together with the case. This makes it possible to save resources and improve productivity.

[Brief explanation of drawings]

FIG. 1 is a longitudinal cross-sectional view showing an example of the disk cartridge of the present invention, FIGS. 2A and B are cross-sectional views showing positioning recesses and protrusions, respectively, before and after press-fitting, and FIG. FIG. 3 is an exploded perspective view showing how the upper and lower cases are temporarily connected. DESCRIPTION OF SYMBOLS 1...Case body, 2...Upper case, 3...Lower case, 10...Magnetic disk, 40...U-shaped clip, 41, 42...Recess.

Claims (1)

[Claims] 1. A method for manufacturing a disk cartridge, in which a case body is formed by combining two upper and lower case parts, and a disk is rotatably housed in the case, in which a case is divided into two upper and lower parts. The disk was rotatably stored in one side of the case, the upper and lower cases were then positioned relative to each other, and a U-shaped clip was attached to the outer surface of the case to temporarily connect them, and then the upper and lower cases were completely connected and combined. Disk cartridge manufacturing method. 2. Claim 1, in which a U-shaped clip is attached to a recess formed on the outer surface of the case to temporarily connect the case.
2. Method for manufacturing the disk cartridge described in Section 1.