JPS60182082A - Disk cartridge - Google Patents

Abstract

PURPOSE:To prevent such a serious error that top and bottom hard cases are assembled without any recording prevention piece by providing a moderation recess, where a protrusion of a recording prevention piece can be engaged with to either sliding guide of top and bottom hardcases. CONSTITUTION:A recording prevention piece 20 is slidably provided on two sets of guides 18 and 18' and 19 and 19', which are installed on a bottom hardcase 1 and a top hardcase 2, and opens/closes selectively a hole 21 provided on the slide guides 18' and 19. Said piece 10 is provided with an elastic leg 25 having a protrusion on the top of the leg 25, which can be engaged with a moderation recess 23 provided on the slide guides 18 and 19 at the side of the bottom hardcase 1. As a result, after the recording prevention piece 20 is provided on the slide guides 18 and 19, the top hardcase 2 is covered and assembly of a disk cartridge can be performed, and said piece 20 will not slip off at the time of assembly.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to the structure of a conventional floppy disk rotatably incorporating a disk-shaped recording medium such as a magnetic disk, and its problems. The introduction of disks has been remarkable, and recently, floppy disks that are protected and housed in cartridges in storage cases have become more popular, making them easier to use.

Hereinafter, the above-mentioned disk cartridge will be explained with reference to the drawings.

A conventional disk cartridge is shown in Figs. 1 to 4. In the figures, 1 is a lower note case, 2 is a hard case, and the lower note case 1 and the upper hard case 2 are Both ends of the front part of the inner sleeve 1 [are the sliding guide parts 3.3
' is provided. Below...-F case 1 and above...
- The sliding guide part 3 and the sliding guide part 3' are combined in the case 2 to form a pair. In addition, the sliding guide part 3 with
Four moderation portions 4 are provided on the side wall of.

Reference numeral 5 denotes a disk-shaped recording medium, and the hub 6a at the center of the disk-shaped recording medium 5 is placed inside a case consisting of a hard case 1 and a hard case 2. An exposed center window 6 is provided, and the head of the recording/reproducing device is connected to the disk-shaped recording medium 6.
A head window 7 is provided for contacting.

Reference numeral 8 denotes a recording prevention piece that is slidably disposed on the sliding guide parts 3, 3', and this recording prevention piece 8 has a small piece 1Q on the prevention piece main body 9.
The prevention piece main body 9 is provided with an elastic leg 12 having a protrusion 11 at its tip that can be fitted into the f5i JM- recess 4.

Reference numeral 13 denotes a recording prevention detection hole provided in the sliding guide portion 3'.
0 is selectively exposed to the outside. In FIG. 1, the center of the prevention piece body 9 of the recording prevention piece 8'
:<+'Insert the Ivc small piece 1o into the sliding guide part 3 of the lower node case 1 and the upper hard case 2.

Here, the disk-shaped recording medium 5 is rotatably housed inside a case formed by combining upper and lower hard cases 1 and 2, and a drive pin rotates the disk-shaped recording medium 5 through a center window 6. , drive. Then, the head window 7 causes the magnetic head to record and reproduce data onto the disk-shaped recording medium 5. At this time, in order to avoid erroneous recording on the disc-shaped recording medium 5, the disc cartridge is provided with a recording prevention mechanism. This depends on whether the optical signal passes through the recording prevention detection hole 13, or whether the optical signal passes through the hole 13 for recording prevention detection.
It is determined based on the surface position of No. 3.

FIG. 2 shows an enlarged view of the sliding guide part 3 and the recording prevention piece 8, where 14 is a force receiving part that receives the movement operation force applied to the recording prevention piece from the outside, and 15 is a force receiving part 14. This is an opening formed by opening the part facing the movable area.

FIG. 3 is a side sectional view of the sliding guide portion 3 and the recording prevention piece 8 in a stopped state. Here, the elastic legs 12 and the convex portions 11 provided on the recording prevention piece 8 do not protrude from the dividing surface 16 of the lower hard case 1 which is divided into two parts when the recording prevention piece 8 is attached to the sliding guide part 3.

Figures 4a and 4b are diagrams showing when the recording prevention detection hole 13 is in the open state (Figure 4a) and when it is in the closed state (Figure 4b). The movement operation force exerted on 8 is received by force receiving section 14 . 1T represents the movement operation force.

Note that FIGS. 4a and 4b are views seen from the direction of arrow A in FIG. 2.

Conventionally, one of the two recording prevention pieces 8 was attached to the sliding guide part 3 of the lower hard case 1, and the other recording prevention piece 8 was attached to the sliding guide part 3 of the second hard case 2. 9 Lower Hard Case 1.2 was being assembled. However, with this method, the recording prevention piece 8 attached to the upper hard case 2 during assembly tends to come off before assembly with the lower hard case 1.
A serious mistake occurs in assembling and undoing the upper and lower hard cases 1.2 without the recording prevention piece 8.

OBJECTS OF THE INVENTION The present invention solves these conventional drawbacks, and aims to enable a recording prevention detection mechanism to be assembled more easily and with stable assembly.

Structure of the Invention In order to achieve this object, the present invention provides an upper hard case and a lower hard case that constitute a case in which a disk-shaped recording medium is rotatably housed, and an upper hard case and a lower bird case, respectively. and a silk sliding guide part provided with a hole for recording prevention detection, and a recording prevention piece slidably disposed on the sliding guide part and for selectively opening and closing the hole. , the recording prevention piece is provided with an elastic leg having a convex portion at its tip, and the convex portion of the recording prevention piece can be secured to a sliding guide portion of one of the upper hard case and the lower hard case. It has been established.

DESCRIPTION OF EMBODIMENTS FIGS. 6 to 7 show a disk cartridge according to an embodiment of the present invention. In FIGS.
Components that are the same as those of the conventional device shown in FIGS.

In the figure, on both ends of the lower hard case 1 and upper hard case 2, there are two sets of sliding guide parts IE+ and 18' that form a pair by combining the lower hard case 1 and the upper hard case 2. , 19.19' are provided. A recording prevention piece 20 is slidably disposed on these two sets of sliding guide parts 18, 18' and 19, 19'.
The holes 21 provided in 8' and 19 are selectively opened and closed. As shown in FIG. 6, this recording prevention valve 2o is provided with a through hole 22 to prevent sink marks on the surface due to molding, and a sliding guide portion 18 on the lower case 1 side. An elastic leg 25 is provided which has a convex portion 24 at its tip that can be held in a moderation recess 23 provided at 19. 26
Reference numeral 27 indicates a force-receiving portion that receives the movement operation force applied from the outside to the recording prevention piece 2o, and 27 indicates an opening portion that faces the movable region of the force-receiving portion 26.

According to the disc cartridge of this embodiment,
The disk cartridge can be assembled by placing the recording prevention piece 2o on the sliding guide part 18. This can be done with two recording prevention pieces 20 placed on the hard case 1 side.
This prevents the recording prevention piece 20 from coming off during assembly.

According to the disk cartridge of the present invention, as described above, the effects of the invention are as follows.
The recording prevention piece does not come off when the upper and lower hard cases are assembled, and it is thereby possible to eliminate the possibility of assembling the upper and lower hard cases without the recording prevention piece.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view showing a conventional disk cartridge, Fig. 2 is an exploded perspective view showing an enlarged main part of the cartridge, Fig. 3 is a top view of the main part, Fig. 4 a, Fig. 5 is an exploded perspective view showing a disk cartridge according to an embodiment of the present invention, and Fig. 6 is an exploded perspective view showing the main parts of the cartridge in an enlarged manner. figure,
FIG. 7 is a side view of the main parts. 1...lower heart case, 2...--1-hard case, 5...disk-shaped recording medium, 18.18
', 19゜19'...Sliding guide part, 20...Recording prevention piece, 21...One hole, 23...Concave part for moderation, 24...Protrusion part, 25...Elastic legs. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 3'13 2nd IA' (Figure 5 Figure 18 Figure 6 Figure 7 0 Procedural amendment 6 May 10, 1985 2 Name of the invention Disk cartridge 3 Person making the amendment L1 Patent filing Personnel Address: 1006 Kadoma, Kadoma City, Osaka Prefecture Name (582) Representative of Matsushita Electric Industrial Co., Ltd. and Toshihiko Yamashita 4 Agent Address: 1006 Kadoma, Kadoma City, Osaka Prefecture 571 Address: 1006 Kadoma, Kadoma City, Osaka Prefecture Address: Matsushita Electric Industrial Co., Ltd. Contents of amendments to the detailed description of the invention in the specification (1) Amend "open state" to "closed state" from page 4, line 20 to page 5, line 1 of the specification. (2) Correct the "closed state" in the first line of page 5 to "1 open state" and remove it. (3) Change the "recording prevention valve 20" in the sixth line of page 7 to "recording". The prevention piece is corrected to 20" and cut out.

Claims (1)

[Claims] An upper hard case and a lower node case constituting a case in which a disk-shaped recording medium is rotatably housed, and two sets each having a hole for recording prevention detection provided in each of the upper hard case and the lower hard case. and a recording prevention piece that is slidably disposed on the sliding guide part and that selectively opens and closes the hole, and the recording prevention piece has a convex portion 7i^1 at the tip. Provided with an elastic leg having a section, the upper...
- A disc cartridge in which a moderation recess is provided in a sliding guide portion of either the hard case or the lower hard case, with which the projection of the recording prevention piece can engage.