JPH02230576A - Shutter releasing mechanism - Google Patents

Abstract

PURPOSE:To easily release and hold a shutter by setting a mechanism loadably/ unloadably freely on a disk cartridge providing with the shutter to open/closing an aperture part for recording and reproduction, and holding the shutter at a released state by cancelling the mechanism to lock the closed state of the shutter. CONSTITUTION:Another shutter release fixing member 8 is mounted in such a way that it can be loaded/unloaded freely on an end face on which the slider 4 of a cartridge main body is provided. When the member 8 is inserted to the inside as pressing the projecting part 6c of a stopper by using a projecting part 8d, the engagement of the hook part of the slider 4 with the notched part 6b of the stopper 6 is released, and a locked state is cancelled, and next, the member 8 is moved in a direction of arrow head B, then, the shutter 3 is released. Since the rib of the main body is moved by sliding with an elastic part 8c, it is fixed in a direction of arrow head C elastically, and a fixing terminal 8e is fitted in the notched part of the main body by further movement, and movement in the direction of arrow head B can be regulated, thereby, the shutter can be held at the released state. In such a way, the shutter 3 can be released by a manual operation and the releasing of the shutter can be fixed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a shutter opening mechanism used in a disk cartridge such as an optical disk or a magnetic disk.

[Prior Art] Conventionally, a disk cartridge such as an optical disk or a magnetic disk has an opening that exposes a part of the recording surface of a disk-shaped recording medium housed inside and into which a recording/reproducing head is inserted. ing. This opening is provided with a shutter that closes the opening in order to protect the internal recording medium from the external environment except during recording and reproduction. Furthermore, this shutter is provided with a spring that biases the shutter in the closing direction and a shutter lock mechanism that prevents the shutter from being opened accidentally except during recording and playback.

[Problems to be Solved by the Invention] However, in conventional disk cartridges, when fingerprints, dust, oil, or other stains adhere to the internal recording medium due to a misoperation or an accident, and it becomes necessary to open the shutter,
It is extremely difficult to release the above-mentioned shutter lock mechanism and to fix the shutter, which is biased in the closing direction by the spring, in the open state.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a shutter opening mechanism that eliminates the above-mentioned drawbacks and can easily open and hold the shutter.

[Means for Solving the Problems] In order to achieve the above object, a shutter opening mechanism according to the present invention is provided with a shutter opening mechanism that is removable from a disk cartridge having a shutter for opening and closing a recording/reproducing opening. Closing t1. The present invention is characterized in that the shutter is held in an open state by releasing a mechanism that locks the state.

[Operation] The shutter release mechanism having the above configuration can release the locking mechanism of the shutter and hold the shutter in an open state.

[Example] The invention will be described in detail based on illustrated embodiments.

FIG. 1 is a plan view of the disk cartridge, showing the state in which the shutter is open. The thin box-shaped curl/ridge wooden body 1 houses a disc-shaped recording medium D inside, and the recording surface side of the disc-shaped recording medium D of the car 1/ridge wooden body 1 has a substantially rectangular shape. An opening 2 is provided.

Further, a thin plate-like shutter 3 having a substantially rectangular shape is similarly provided in the aperture 2 so as to be slidable in the direction of the arrow rllJA together with a slider 4. This slider 4 is adapted to slide along one end surface of the cartridge body, and is supported by a spring 5.
The shutter 3 is normally biased in the direction of closing, and the left end of the slider 4 is provided with a hook portion 4a. Also, the slider 4 moves and the hook portion 4a
A stopper 6 is rotatably attached to the position where the leaf spring 7 contacts, and a stopper 6 is rotatably mounted around a support shaft 6a at the left end.
is urged upward by. A notch 6b that engages with the hook 4a of the slider 4 is provided at the right end of the stopper 6.

A shutter opening fixing member 8 separate from the cartridge body 1 is removably attached to the end face of the car 1/ridge wooden body 1 where the slider 4 is provided. As shown in FIG. 2, this shutter release fixing member 8 is composed of a thin plate-like handle part 8a and a fitting part 8b for the cartridge wooden body 1 having a U-shaped cross section. A protruding elastic portion 8C is provided on the inside of the car 1 and the ridge wooden body 1 and fits into the tab 9.

Further, in FIG. 1, a convex portion 3d protruding diagonally downward is provided on the right side of the fitting portion 8b, and a convex fixed end 8e is provided on the left side.

FIG. 3 is a plan view of the disk force-1 ridge with the shutter 3 closed. When the shutter 3 is closed in this manner, the hook portion 4a of the slider 4 engages with the cutout portion 6b of the slippere 6, and the leaf spring 7 further pushes the springer 6 upward. Due to this, the shutter 6 is locked and it is impossible to open the shutter 3 in this state.

FIG. 4 shows a case where the shutter release fixing member 8 is used to release the shutter lock mechanism and open the shutter 3. When the shutter release fixing member 8 is inserted inside while pressing the protrusion 6c of the stopper 6 using the protrusion 8d,
The engagement between the hook portion 4a of the slider 4 and the notch portion 6b of the stopper 6 is released, and the opening and closing portion are released. Next, the shutter opening fixing member 8 is moved in the direction of arrow B to open the shutter shutter 3.

At this time, as shown in FIG. 2, the shutter release fixing member 8 moves while sliding on the rib 9 of the cartridge wooden body 1 and the elastic portion 8C, so that it moves elastically in the direction of arrow C in FIG. Fixed. Furthermore, by moving it in the direction of arrow C as well as in the direction of arrow B, the state shown in FIG. 1 is reached, and the convex fixed end 8e fits into the notch of the disk cartridge main body 1 (not shown). As a result, the movement in the direction of arrow B is regulated, thereby making it possible to keep the shutter 3 open.

When cleaning the disk D is completed and the shutter 4 is to be closed again, first, the convex fixing end of the shutter opening fixing member 8 that is fitted into the notch of the disk force-1/ridge wooden body 1 (not shown) is pressed. 8e manually and remove the shutter opening fixing member 8.
Remove from rib 9. Then, the force of the spring 5 pushes the shutter 5 in the closing direction, automatically closing the opening.

[Effects of the Invention] As explained above, the shutter opening mechanism according to the present invention has the following effects:
It is now possible to manually open and lock the shutter so that even if the disc-shaped recording medium inside the disc cartridge becomes dirty, the shutter can be kept open and this can be easily dealt with by cleaning, etc. .

[Brief explanation of the drawing]

The drawings show an embodiment of the shutter opening mechanism according to the present invention,
Fig. 1 is a plan view when the shutter is open, Fig. 2 is a sectional view of the shutter opening fixing member, Fig. 3 is a plan view when the shutter is closed, and Fig. 4 is a plan view when the shutter opening fixing member is inserted. . 1 is a cartridge body, 2 is an opening, 3 is a shutter, 4 is a slider, 5 is a spring, 7 is a leaf spring, 6 is a stopper, 8 is a shutter release fixing member, 9 is a rib, and D is a disk-shaped recording medium. be. Patent applicant Canon Inc. Figure 3 Figure 4

Claims (1)

[Claims] 1. Shutter opening, which is removable from a disc cartridge having a shutter for opening and closing a recording/reproduction opening, and is characterized by releasing a mechanism that locks the shutter in a closed state to hold the shutter in an open state. mechanism.