| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a power transmission device which can improve the operability of an armature by suppressing an increase in the number of parts. <P>SOLUTION: The power transmission device 1 comprises: an outside rotating member 3; an inside rotating member 5 which is arranged so as to be rotatable with respect to the outside rotating member 3; a first connecting and disconnecting part 7 which is arranged between the outside rotating member 3 and the inside rotating member 5, and connects and disconnects the outside rotating member 3 and the inside rotating member 5; a connecting and disconnecting operation part 11 having an annular pressing member 9 for pressing the first connecting and disconnecting part 7; a second connecting and disconnecting part 13 which is arranged between the outside rotating member 3 and the connecting and disconnecting operation part 11, and operates the pressing member 9; the annular armature 15 which is arranged between the pressing member 9 and the second connecting and disconnecting member 13, and connectedly and disconnectedly operates the second connecting and disconnecting part 13; and an electromagnet 17 which operates the armature 15. A gap formation part 19 for forming a prescribed gap between the pressing member 9 and the armature 15 is integrally formed at a portion opposing the inside diameter side more inner from the middle point of a magnetic flux transmission part of the armature 15 of the pressing member 9. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
