| 摘要 |
PROBLEM TO BE SOLVED: To configure a valve opening/closing timing control device capable of quickly releasing a lock member.SOLUTION: A valve opening/closing timing control device includes a driving-side rotary body 10 having a receiving portion 12S receiving rotation of a crank shaft 1 of an engine E and a driven-side rotary body 20 which are coaxially relatively rotatable. A lock member 15 moving along a guide groove formed on the driving-side rotary body 10 is engageable with a recessed portion 27 of the driven-side rotary body 20. A communicating portion 41 for communicating a back space GH at a side opposite to the recessed portion 27 and an external space, of the guide groove is formed in a region including an inner face of a wall portion 13 at an opposite side of the receiving portion 12S. |
