Apparatus for quick starting tape in video cassette recorders

Abstract

An apparatus for quick starting of tape forwardly-and-rewinding operation for video cassette recorders, wherein fast-forwarding or rewinding operation of a video tape can be quickly started, because loading plates, which are locked in loading holes as during the recording or reproducing operation, keep the tape being loaded on a head drum, while the tape can be wound by only the driving force to rotate one of the reel discs, because two guide grooves in different shapes are provided on upper and lower surfaces of a cam gear and so a tension pole and a pinch roller come off the tape and the tape gets out of touch with various fixed posts in its travelling route, before the fast-forwarding or rewinding operation is started.

What is claimed as new and desired to be secured by Letters Patent of the United States is: 
     
       1. An apparatus for quick starting of tape forwarding-and-rewinding operations for a video cassette recorder, said apparatus comprising: (a) a cam gear (2) which is mounted under the recorder main deck (1), rotates through a connecting gear (5) by a loading motor (4), and has guide grooves (3, 3') at its bottom and top surfaces;   (b) a sector gear (6) which is rotatable by means of a guide pin (6') captured in the said guide grooves (3') and in turn rotates ring gears (8, 8') through transmission gears (7, 7');   (c) loading plates (9, 9') having loading rollers (10, 10') and loading poles (11, 11') which are elastically connected to the said ring gears (8, 8') by tension springs (14, 14') and also additionally by supporting plates (12, 12') and connecting pins (13') inserted in openings (13) formed in the said ring gears (8, 8'), the said loading rollers (10, 10') and loading poles (11, 11') being exposed above the recorder main deck (1) through loading holes (34, 34') formed in the recorder main deck (1);   (d) an operating rod (15) which has a guide pin (15') captured in the guide groove (3) and is connected to a slide plate (16) above the recorder main deck (1) by a connecting pin (17), the front end of the slide plate (16) being connected to the tension rod (21) through a connecting rod (22);   (e) a pinch arm (20) which is formed with a pinch roller (18) and a guide roller (19) on each end of it and operated by the said tension rod (21); and   (f) a guide pin (16') which is installed on the front end of the operating rod (15) and protrudes above the recorder main deck (1) through a guide hole (23), the said guide pin (16') serving to guide a tension arm (25) with a tension pole (24). .Iadd.2. The apparatus of claim 1, wherein said guide grooves (3,3') are arranged so that as said cam gear rotates from a starting position to a first position, said loading rollers and loading poles are locked against ends of said loading holes (34, 34') via said tension springs (14, 14'), said connecting pins 13' and said openings 13, and as said cam gear rotates from said first position to a second position there is no effect on said loading rollers and loading poles. .Iaddend. .Iadd.3. The apparatus of claim 1 or 2, wherein said guide grooves (3, 3') are arranged so that as said cam gear rotates from a starting position to a first position, said pinch roller (18), said guide roller (19) and said tension pole (24) are moved to first tensioning positions in which fast forward and reverse operations of said apparatus are carried out, and as said cam gear rotates from said first position to a second position, said pinch roller (18), said guide roller (19) and said tension pole (24) are moved to second tensioning positions in which normal recording and playback operations are carried out; said pinch roller, said guide roller and said tension pole exerting greater tension on said tape in said second tensioning position than in said first tensioning position. .Iaddend.