Dynamic information storage or retrieval – Dynamic mechanism subsystem – Specific detail of storage medium support or motion production
Reexamination Certificate
1998-11-25
2001-03-13
Korzuch, William R. (Department: 2757)
Dynamic information storage or retrieval
Dynamic mechanism subsystem
Specific detail of storage medium support or motion production
Reexamination Certificate
active
06201782
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to a disc loading apparatus for a disc player, in which an imperfectly inserted disc is not clamped between a turntable and a clamper.
2. Description of the Prior Art
In a usual disc loading apparatus for a disc player, in response to the sending of a disc from the outside, a clamper is automatically caused to approach a turntable, thus holding the disc on the turntable with the clamper to be ready for playing the disc.
In such an apparatus, sometimes the user may intend in fluster to pull out a disc which is being inserted. In such a case, the disc may not be completely pulled out but be held on the turntable by the clamper automatically caused to approach the turntable. If it is intended to pull out the disc irrationally in such a case, it is possible to cause damage to the disc and also to the internal mechanism.
SUMMARY OF THE INVENTION
The present invention seeks to solve the above problem, and its specific object is to provide a disc loading apparatus for a disc player in which, in response to the sensing of insertion of a disc, a clamper is caused to approach a turntable and hold the disc on the turntable, and pulling out the disc after the start of approach of the turntable by the clamper, brings about an operation of preventing the clamper from approaching the turntable, thus preventing otherwise possible damage to the disc and the internal mechanism of the disc player.
Another object of the invention is to prohibit, when a disc is held on the turntable, double insertion of other disc by mistake, thus preventing otherwise possible damage to the discs and the internal mechanism.
According to the invention, the clamper is carried by a clamper supporting member having an engagement portion, and a stopper is disposed on the line of movement of the engagement portion. The stopper is normally at a preventing position of being in contact with the engagement portion to prevent the clamper from approaching the turntable. When a disc has been inserted up to a position that it can be held on the turntable, the stopper is pushed by the disc to an approach allowable position to allow the clamper to approach the turntable. When the clamper approaches the turntable, the stopper is pushed by the engagement portion from the approach allowable position to a retreated position, at which the stopper is out of contact with the disc.
Thus, when a disc being inserted is pulled out in fluster, the stopper prevents the clamper from approaching the turntable, thus preventing damage to the disc and the internal mechanism. When the disc is normally inserted, it pushes the stopper to the approach allowable position, thus permitting normal operation of the clamper. Besides, since the stopper is separated from the disc by the engagement portion while the clamper approaches the turntable, the disc can be turned without possibility of being obstructed by the stopper.
With this arrangement, since the stopper is separated from the disc with sliding of the engagement portion along a sliding contact portion which is provided on the stopper, the stopper can be separated form the disc with a simple construction.
The same effects are also obtainable with a converse arrangement that the sliding contact portion is provided on the engagement portion and caused to slide along the stopper.
Furthermore, a double insertion prohibiting member may be provided, which is interlocked to the stopper such that it is normally out of the passage of the disc and, when stopper is pushed by the engagement portion of the clamper supporting member to the retreated position, it appears on the passage of the disc and prohibits the insertion of the disc. With this arrangement, the double insertion of disc can be prohibited with a simple construction.
REFERENCES:
patent: 4669076 (1987-05-01), Broom et al.
patent: 4730296 (1988-03-01), Urata et al.
patent: 4730300 (1988-03-01), Kamoshita et al.
patent: 5058094 (1991-10-01), Suzuki
patent: 5084854 (1992-01-01), Ikedo et al.
patent: 5084855 (1992-01-01), Kobayashi et al.
patent: 5825746 (1998-10-01), Lee
patent: 5831948 (1998-11-01), Suzuki
Akatani Shigeru
Kido Kunio
Shitamichi Akeshi
Tanaka Shinsaku
Yamanaka Takashi
Dickinson Wright PLLC
Fields Kenneth W
Korzuch William R.
Tenashin Denki Co., Ltd
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