Dynamic magnetic information storage or retrieval – Record transport with head moving during transducing – Tape record
Reexamination Certificate
1999-12-08
2002-09-10
Cao, Allen (Department: 2652)
Dynamic magnetic information storage or retrieval
Record transport with head moving during transducing
Tape record
Reexamination Certificate
active
06449118
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a magnetic recording/reproducing apparatus and, more particularly, to a magnetic recording/reproducing apparatus in which power is selectively transferred to a running system or a loading system using only capstan motor.
2. Description of the Prior Art
Generally, almost all the magnetic recording/reproducing apparatus which is supplied for domestic use employs a ½ inch tape cassette.
The magnetic recording/reproducing apparatus comprises a cassette holder in which a tape cassette is mounted, driving members which pulls the cassette holder into a main body and mounts the cassette holder on a main deck, a loading/unloading device for loading or unloading a magnetic tape received in the tape cassette into/from a side of a rotary head drum, a tape guiding member for guiding the magnetic tape so that the magnetic tape is running along a predetermined passage.
If the tape cassette is inserted into a cassette entrance of the magnetic recording/reproducing apparatus, the tape cassette is accommodated in the cassette holder and the cassette holder is simultaneously mounted on the main deck. The magnetic tape is loaded to the side of the head drum rotating at a high speed by a supply and winding side pole base which is comprised in the tape loading/unloading device. And then, a signal is recorded on the magnetic tape or the recorded signal is reproduced.
Recently, a potable tape recorder with a video camera in which the above magnetic recording/reproducing apparatus is applied has been widely spread. In such magnetic recording/reproducing apparatus, there has been devoted an effort to reduce a size and weight of the apparatus in order to promote the convenience of a user.
Typically, the size of the deck is known as one of the main problems which exert an influence on the reducing of the size and weight of the magnetic recording/reproducing apparatus. Therefore, since it is a measure of technical level of a manufacturer to reduce the size and weight of the apparatus, various methods has been studied.
As one of the results of such research and development, there is proposed a Korean Patent Application No. 93-5016 by the applicant of this invention, entitled “Magnetic recording/reproducing apparatus and mode controlling method thereof”.
In the magnetic recording/reproducing apparatus of the above application, a rotary drum is adapted to be accommodated in an inner space of a tape cassette when completing the loading operation of the tape cassette, thereby miniaturizing the size of a chassis. In addition, the apparatus is characterized that the loading and running operation of the magnetic tape is facilely achieved by a single driving source and each mode controlling operation is also facilitated without any separate device, thereby reducing a number of component parts thereof.
However, in the magnetic recording/reproducing apparatus as described above, a cam gear having a big size is mounted at both sides of a main chassis. There is also provided each member for respectively transferring power of a capstan motor to a running system and to a loading system. Further, the each member is provided with a plurality of gears. Therefore, there is a limit in reducing the size of the deck.
SUMMARY OF THE INVENTION
It is, therefore, an object of the present invention to provide a magnetic recording/reproducing apparatus of which the size of a deck mechanism is reduced almost as much as that of the tape cassette, thereby reducing the whole size of the apparatus and simplifying the construction thereof.
In accordance with the present invention, there is provided a magnetic recording/reproducing apparatus, comprising: a driving source; a main chassis on which the driving source is mounted; a sub chassis which is disposed to the main chassis so as to be slid in a front and rear direction, and which is provided with various tape running elements; a head drum device which is mounted on the main chassis; a loading system provided with a supply side pole base driving device and a winding side pole base driving device which loads a tape depending on the moving operation of the sub chassis in the front and rear direction; a running system which runs the tape in a desired direction at a desired speed; a main power transmitting means which selectively transmits a power of the power source to the loading system or the running system; a cam gear which is rotated by the main power transmitting means and transmits the power to each mode; a slider which is disposed between the main chassis and the sub chassis so as to be slid in a left and right direction and interlocked with the cam gear; a mode detecting means which detects each mode according to the tape running; a tape tension regulating means which applies a proper tension to the tape; an automatic separating means which automatically blocks a power transmission to the loading system in a particular mode; a connecting means which permits the power transmission to the loading system in a particular mode; and a connection maintaining means which maintains the power transmission at the time of loading/unloading the tape or in the early re-connection which transmits again the power to the loading system.
Preferably, the automatic separating means comprises a power transmitting means which transmits the power of the driving source to the cam gear, a rod moving lever which is rotatably coupled to one side of the main chassis and interlocked with the power transmission means, an elastic means which elastically supports the rod moving lever so that an elastic force is always exerted in one direction, a shift rotating member which is rotatably mounted on the other side of the main chassis and interlocks the rod moving lever depending on the rotation of the cam gear, and an elastic means which elastically supports the shift rotating member so that an elastic force is always exerted in one direction.
Preferably, the power transmitting means comprises a plurality of power transmission gears which are mounted between a central gear pulley and the cam gear, and a operational lever which supports a part of the power transmission gears and is connected to the rod moving lever.
Preferably, the power transmitting means comprises a third power transmission gear which is rotatably mounted on the main chassis and connected with the cam gear, a second power transmission gear which is engaged with the third power transmission gear, and a first power transmission gear which is coupled to an end of the operational lever rotatably coupled to a rotational center shaft of the second power transmission gear and which is selectively engaged with a central gear pulley.
Preferably, the rod moving lever is provided with a slot at one end thereof, a latching pin which is inserted into the slot of the rod moving lever is formed on an end of the operational lever so that the rod moving lever is interlocked by a rotating operation of the operational lever.
Preferably, the connecting means comprises a solenoid which is mounted on the rod moving lever, and a trans-latch which is rotatably mounted on the rod moving lever and interlocked with the shift rotating member and which is provided with an attachment portion magnetically attached to the solenoid.
Preferably, the shift rotating member comprises a first protrusion which is guided by a cam projection formed on an outer circumference of an upper face of the cam gear, a second protrusion which operates a latching portion of the trans-latch, a third protrusion which is guided by an operational pin formed in the outer circumference of the cam gear.
Preferably, the connection maintaining means comprises a guiding slot which is formed at the shift rotating member, and a latching portion which is formed at the rod moving lever and which is inserted into the guiding slot of the shift rotating member.
Preferably, the attachment portion is separately formed from the trans-latch, a supporting portion is formed on an end of a trans-latch, an upper guiding portion is
Baik Chung-Hum
Cho Young-Ho
Choi Do-Young
Choi Hyeong-Seok
Hong Sung-Hee
Bushnell , Esq. Robert E.
Cao Allen
Samsung Electronics Co,. Ltd.
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