JPS6320792A - Opening/closing device for cassette cover - Google Patents

Abstract

PURPOSE:To surely open a cassette cover by pressing forcibly the cover in its opening direction in an abnormal time when the cover is locked. CONSTITUTION:A clock member 6 is turned counterclockwise in interlocking with the action of an ejection member 9 and a lock state is released. Thus a cassette cover 1 is usually opened by the force of a tension spring 4 before a folded part 9b touches a hinge part 1c. However the part 9b touches the part 1c and pushes up forcibly the cover 1 in its opening direction in such an abnormal time when large external power or frictional force is applied to a tape cassette loaded on the cover 1 and this cover 1 is locked. Thus the cover 1 is slightly pushed up and its locked state is released. Thus the cover 1 is opened by the force of the spring 4. In such a way, the cover 1 is surely opened.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an opening/closing device for a cassette lid provided in a cassette storage chamber of a recording/reproducing apparatus.

[Conventional technology]

Conventionally, a cassette lid that can be opened and closed is biased in the opening direction f using a toggle spring or the like.
It is shown in Japanese Patent No. 191965. Generally, in Kangaru pocket type cassette lids, the opening angle of the lid is regulated using a stopper to prevent the tape cassette from popping out due to inertia in the opening direction of the cassette lid, and to make it easier to insert the tape cassette. There is.

By the way, if the force of the spring i + is sufficient to ensure the opening of the cassette lid, the cassette lid will come into contact with the stopper forcefully at the time of opening, causing an unpleasant sound and causing the cassette lid to bounce. occurs.

In order to solve this problem, attempts have been made to reduce the force of the spring.

[Problem that the invention seeks to solve]

In the prior art, when the force of the spring is reduced in order to eliminate bounce of the cassette lid and unpleasant noise, the opening operation of the cassette lid becomes uncertain due to external force and frictional force applied to the tape cassette.

On the other hand, even if the spring strength is sufficient, if a large external force or palm rubbing force is applied to the tape cassette, the cassette lid will become locked, making it impossible to open the cassette lid by ejecting. .

This invention was made by focusing on the above problems (
To provide a cassette lid opening/closing device capable of surely opening a cassette lid in the event of an abnormality in which the cassette lid is in a locked state.

[Means and operations for solving the problem] The present invention provides an ejector member that locks the cassette lid, which is biased in the opening direction by an elastic member, in the closed state, and drives the ejector member. The cassette lid is pressed in the opening direction in accordance with the necessity.

〔Example〕

Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

FIGS. 1 and 2 show an example in which the present invention is applied to a cassette storage chamber of a recording/reproducing device. In FIG. lb is set up. The cassette lid 1 is biased in the opening direction by an elastic member such as a tension spring 4, and when opened at a predetermined angle as shown by the two-dot chain line in FIG. The hinge portion 1c of the cassette lid l comes into contact with the stopper 51 to restrict rotation.

Further, the cassette lid 1 is opened by the locking member 6 in the closed state. The lock member 6 is rotatably mounted on a shaft 7, biased clockwise by a toggle spring (not shown), and maintained at the position shown by a stopper 8. This lock member 6
By sliding the eject member 9 downward,
The protrusion 9a of the eject member 9 engages with the protrusion 6a of the ejection member 6 and is biased to rotate counterclockwise, thereby releasing the ejection.

The eject member 9 is biased by a tension spring 10 so as to return to the position shown by the solid line in the figure. It is located behind the. In this case, the bent portion 9b is inserted into the hinge portion 1c of the cassette lid l when the lock member 6 is unlocked by the eject operation.
It is preset to be slightly away from the

Now, when the locking member 6 is rotated counterclockwise in conjunction with the ejecting member to release the lock, the bent portion 9 normally
The cassette lid 1 is opened by the spring force of the tension spring 4 before b contacts the hinge portion 1c. However, in an abnormal situation where a large external force or frictional force is applied to the tape cassette loaded in the cassette lid 1 and the cassette lid 1 becomes locked, the bent portion 9b comes into contact with the hinge portion 1cl and the cassette lid 1
is forcibly pushed up in the opening direction. Then, the skein.

When the cassette lid 1 is pushed up a little and the closed state is released, the spring force of the tension spring 4 closes the cassette lid.

1 is released.

Therefore, with such a configuration, in the event of an abnormality in which a large external force or frictional force is applied to the tape cassette loaded in the cassette lid 1 and the cassette lid is locked, the cassette lid 1 cannot be forcibly pushed up. Therefore, the cassette lid 1 can be opened reliably. In addition, if the force of the tension spring 4 is reduced, it becomes more likely to fall into a locked state, but since the bending portion 9b operates effectively, the cassette lid 1 can be opened freely, and It is also possible to prevent impact noise and bounce when the cassette lid 1 contacts the stopper 5.

In the second embodiment described above, the eject member is bent into an L shape, and in the event of an abnormality, the bent portion is brought into contact with the hinge portion of the cassette lid to forcibly open the cassette lid. As shown in FIG. 3, one end of the eject member and the C plate 2
A wire 11 is installed on the back surface of the cassette lid 1, and the cassette lid 1 can be pressed in the direction of opening in conjunction with the eject member in the event of an abnormality. In FIG. 3, parts that are the same as those in the first embodiment are given the same reference numerals and their explanations will be omitted.

Such configuration I can also provide the same effects as described above.

It should be noted that the present invention is not limited to the above-mentioned embodiments, and can be implemented with various modifications without changing the gist.

〔Effect of the invention〕

According to this invention, the cassette lid can be reliably opened by forcibly pressing the cassette lid in the opening direction in the event of an abnormality in which the cassette lid is in a locked state.

[Brief explanation of drawings]

FIG. 1 is a plan view showing a schematic configuration of one embodiment of the present invention, and FIG. 2 is a plan view showing a schematic configuration of another embodiment of the present invention. FIG. 3 is a plan view showing the configuration.

Claims (1)

[Claims] A cassette lid that can be opened and closed, an elastic member that biases the cassette lid in an opening direction, a locking member that locks the cassette lid in a closed state, and an ejector that drives the locking member. and a means for pressing the cassette lid in an opening direction as necessary in conjunction with the eject member.