in the description of the present invention , parts having the same construction as conventional ones shall be indicated with the same reference numerals . fig4 is a perspective view of a loading gear assembly , showing a construction of an essential part of the present invention , in which on a peripheral surface of a loading gear 25 is formed a teethless portion 25a in a predetermined angle , and on one side of the lower surface of the bottom thereof is mounted saliently a projection 25b , and in the middle area is formed a shaft hole 25c . to the lower side of the loading gear 25 is rotatably coupled an annular rotating body 26 , ion the central upper surface of which is formed a hollow shaft 26a which is rotatably fitted in the shaft hole 25c . on the external edge of the upper surface of the rotating body 26 is formed a pair of locking jaws 26b , 26b &# 39 ; having a predetermined spaced apart relatively in the direction of the shaft 26a so that the projection 25b mounted saliently on the lower surface of the loading gear 25 is located between the locking jaws 26b , 26b &# 39 ;. in the center of the lower surface of the rotating body 26 is mounted an annular projecting part 26c extended in the downward direction and provided with an annular groove ( not shown ) in which one end of a bushing 24 is rotatably inserted . the other end of the bushing 24 is coupled with the loading arm 23 . since a connecting pin 26d is mounted downwardly and saliently on one side of the lower surface of the bottom of the rotating body 26 , and fitted in the cut - out part 23b formed in a predetermined angle on a peripheral edge of the loading arm 23 , when the loading arm 23 is coupled with the lower side of the rotating body 26 , it plays a role in transmitting the rotational force of the loading gear 25 to the rotating body 26 through the projection 25b and the locking jaws 26b , 26b &# 39 ;. the operating conditions and effects of the present invention will now be described . the present invention is characterized in that the position of one slant post assembly 20 &# 39 ; in the ff / rew mode for high - speed search is different from that of the conventional one . that is to say , according to the present invention , the tape t is wrapped around an audio control head 6 at the time of the ff / rew mode for high - speed search at a predetermined angle in the half - loading state as shown in fig6 . the purpose for this is to carry out the function to record specific signals on the tape t and to search for them on the tape t only with the single audio control head 6 , in contrast to the conventional system . according to the present invention , the projection 25b on the lower surface of the left loading gear 25 is positioned to contact the locking jaw 26b of the rotating body 26 in a stop state . in case it continues to proceed in the ff / rew mode for making a high - speed search in such a state , the power of the driving motor 12 is transmitted to the left loading gear 25 through the same channel as the conventional one , but since the projection 25b on the lower surface of the loading gear 25 is in contact with the locking jaw 26b of the rotating body 26 , the loading gear 25 does not transmit the force of rotation to the rotating body 26 until the projection 25b contacts the other locking jaw 26b &# 39 ;. however , when the projection 25b of the left loading gear 25 is rotated from the locking jaw 26b of the rotating body 26 until it contacts a second locking jaw 26b &# 39 ;, the force of rotation is transmitted to the right loading gear 19 &# 39 ; with which it is engaged and the loading gear 19 &# 39 ; is thereby rotated . accordingly the slant post assembly 20 &# 39 ; connected to the loading arm 23 &# 39 ; on the lower side thereof through the lever 22 &# 39 ; advances in the half - loading state as shown in fig6 and the tape t is wrapped around the audio control head 6 . therefore , it is possible to search out signals recorded on the tape t using the audio control head 6 in the high - speed running mode in such a half - loading state . on the other hand , when the tape t is loaded from such a state to a complete loading state for reproducing it , and the loading gear 25 continues to rotate , the rotational force of the rotating body 26 is transmitted to the rotating body 26 , and thereby the slant post assembly 20 is advanced . in this situation the projection 25b on the lower surface of the loading gear is in contact with the locking jaw 26b &# 39 ; of the rotating body 26 . at this moment , the teethless part 25a of the loading gear 25 meets with the other loading gear 19 &# 39 ;, which results in an idle running of the loading gear 19 &# 39 ; as long as the circumference of the teethless part 25a , and the left slant post assembly 20 is advanced until it is positioned on the same line as the right slant post assembly 20 &# 39 ; which has already advanced . in this way , at the moment both slant post assemblies 20 , 20 &# 39 ; are aligned , the left loading gear 25 is engaged with the right loading gear 19 &# 39 ; and they are able to advance at the same time toward the stoppers 21 , 21 &# 39 ;. the present invention as described hereinbefore has the effect that it is possible to perform the recording and searching for of signals for searching a picture with the same head , using a simple structural modification of the conventional deck mechanism , and thus it is possible to carry out any desired function without making the general structure unduly complex .