JPH0337172Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" The present invention relates to a shutter opening/closing mechanism for a floppy disk cassette with a shutter.

``Prior Art'' A slope that comes into contact with the floppy disk cassette and retreats when the floppy disk cassette is inserted, an engaging portion that closes the shutter when the cassette is ejected, and an engaging portion that closes the shutter after the shutter is closed. A shutter opening/closing mechanism for a floppy disk cassette having a slope for evacuation has already been disclosed. (Japanese Patent Application Laid-Open No. 59-217266).

``The problem that the invention aims to solve'' However, the structure of the conventional one was rather complicated.

"Means and Actions for Solving the Problems" The present invention aims to provide a shutter opening/closing mechanism for a floppy disk cassette with a simple structure, and includes a disk exposed portion, a shutter for opening and closing the disk exposed portion, and a shutter opening/closing mechanism for a floppy disk cassette. A floppy disk cassette having locking means for holding the shutter in a closed position, a case for storing the cassette, and a flexible engagement lever fixed to the case. In the cassette shutter opening/closing mechanism, when the cassette is inserted, the engaging protrusion of the engaging lever pushes down the locking lever of the locking means to release the lock, and pushes the shutter side end to move the shutter, When the cassette comes into contact with the shutter opening stopper, the engaging protrusion engages with the engaging hole of the shutter to keep the shutter open, and when the cassette is pulled out, the engaging lever engages the shutter to the disk exposed part. After the shutter contacts the shutter closing stopper of the cassette by sliding, the cassette is pulled out from the flexible case in a direction in which it is removed from the engagement hole, and the shutter is maintained locked in the closed position.

``Embodiment'' FIG. 1a is a schematic partial cross-sectional view of a case for housing a floppy disk cassette showing an embodiment of the present invention, FIG. 1b is a schematic partial cross-sectional view of this cassette, and FIG. 2 is a schematic diagram of a floppy disk cassette, FIG. 2a is a front view, FIG. 2b is a perspective view, and FIGS. 3 to 5 are schematic diagrams showing other embodiments of the engagement lever of the present invention. 6A to 6D are explanatory diagrams of the operating state.

In Fig. 2, 1 is a floppy disk cassette, 1a is a groove, 2 is a disk exposure hole provided in the cassette 1, 3 is a shutter slidably attached to the cassette 1, and 4 is a shutter 3 in the disk exposure hole. 5 is a shutter opening stopper that stops the shutter 3 when it comes to the open position; 6 is a shutter opening stopper that engages with the locking pawl 3a of the shutter 3 to move the shutter to the closed position. 7 is a center core, and 8 is a floppy disk cassette, which are constructed to have generally standardized dimensions. FIG. 1 shows the structure of the present invention, with a floppy disk cassette 1 installed and a shutter 3 kept open, and the same members as in FIG. 2 are indicated by the same symbols. In Figure 1a, 9 is a partial cross section of a case for storing a floppy disk cassette fixed inside an electronic still camera, etc.;
0 is an engagement lever fixed to the case 9, 10a is an engagement protrusion that engages with the engagement hole 3b of the shutter 3, and 10b is a flexible section. This engagement lever 10 is made of flexible reinforced plastics. And the engagement protrusion 10a of the engagement lever 10
is in a positional relationship that allows it to fit easily into the engagement hole 3b of the shutter 3. 3 to 5 show other embodiments of the engagement lever of the present invention. In FIG. 3, the engagement protrusion 10a is made of metal such as iron or stainless steel or ceramics, and is made of phosphor bronze plate or the like. It is fixed to the end of the flexible portion 10b made of a metal spring by adhesive, welding, or the like. The entire structure of FIG. 4a is made of glass-filled polycarbonate, ABS, or engineering plastic with high surface hardness and spring properties. Fig. 4b shows the engaging protrusion 10a.
It is molded, glued, or welded using metals such as iron and stainless steel, or ceramics.
In FIG. 5, the spring is made of a metal spring material such as a phosphor bronze plate, and the engaging protrusion 10a has a hemispherical embossment, but this may be omitted.

The operation in such a configuration will be explained next.
First, when the cassette 1 is inserted into the case 9, the engagement protrusion 10a of the engagement lever 10 is lightly fitted into the engagement hole 3b of the shutter 3 of the cassette 1, as shown in FIG. Yes, the shutter 3 is in the open state.

Next, when pulling out the cassette 1 from the case 9, pull the cassette 1 to the right in FIG. Slide the shutter to the left in the illustration until the left end of the shutter is in cassette 1.
The shutter 3 comes into contact with the shutter closing stopper 4 and reaches the closed position, and at this time the locking pawl 3a of the shutter 3
engages with the locking portion 6a of the locking lever 6 of the cassette 1 to hold the shutter 3 in the closed state. When the cassette 1 is further pulled to the right, the engaging portion 10a of the engaging lever 10 of the case 9 slides against the left edge of the engaging hole 3b of the shutter 3 and is pushed up, disengaging and removing the cassette 1. Figure 6A].

Next, when inserting the cassette 1, the engagement lever 10
The engaging part 10a slides along the groove 1a of the cassette, and the locking lever 6 is pushed down near where it touches the left edge of the shutter, thereby separating the engaging part 6a and the locking pawl 3a.
Release the lock [Fig. 6B] and release the shutter 3.
Push the left edge of the shutter 3 to slide it to the right (Fig. 6C), and at the position where the shutter 3 contacts the shutter opening stopper 5, the engagement protrusion 10a rides on the upper surface of the shutter 3, and the shutter 3 is further moved. The engagement protrusion 10a moves forward by sliding on the upper surface [Fig. 6D], and when the engagement protrusion 10a reaches the position of the engagement hole 3b, the engagement protrusion 10a
and the engagement hole 3b, and here the loading of the cassette 1 is completed and the shutter 3 remains open and enters its initial state (FIG. 1).

``Effects of the Invention'' As explained above, according to the present invention, the shutter of the floppy disk cassette can be opened and closed with a simple structure, and furthermore, by using the mechanical element made of the material shown in the present invention, the engagement lever can be moved from the edge of the shutter. Also, there is no wear due to friction with the edges of the engagement hole.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing an embodiment of the present invention, FIG. 2 is a schematic diagram of a floppy disk cassette, FIGS. 3 to 5 are schematic diagrams showing other embodiments of the engagement lever of the present invention, and FIG. A to D are explanatory diagrams of operating states. 1...cassette, 2...disk exposure hole, 3...
...Shutter, 3a...Latching claw, 3b...Engagement hole,
4... Shutter closing stopper, 5... Shutter opening stopper, 6... Locking lever, 6a... Locking portion, 9
...Case, 10...Engagement lever, 10a...Engagement protrusion, 10b...Flexible part.

Claims (1)

[Scope of Claim for Utility Model Registration] A floppy disk cassette having a disk exposing portion, a shutter for opening and closing the disk exposing portion, and a locking means for holding the shutter in the closed position, and a floppy disk cassette for storing the cassette. In a shutter opening/closing mechanism for a floppy disk cassette that includes a case and a flexible engagement lever fixed to the case, the engagement protrusion of the engagement lever engages the locking means when the cassette is inserted. Push down the stop lever to release the lock, push the shutter side end to move the shutter, and when it comes into contact with the shutter opening stopper of the cassette, the engagement protrusion engages with the engagement hole of the shutter, and the shutter is opened. When the cassette is pulled out, the engagement lever engages and slides the shutter toward the disk exposed portion, and after the shutter contacts the shutter closing stopper of the cassette, it is deflected in the direction in which it is removed from the engagement hole and released from the case. A shutter opening/closing mechanism for a floppy disk cassette, characterized in that the shutter is retained in a closed position when the cassette is removed.