Driving tool

1. A driving tool which is configured to drive a fastener supplied to a nose by using a striking mechanism, the driving tool comprising:

a trigger that is configured to receive a manipulation which operates the striking mechanism;

a contact arm that is configured to reciprocate and that is configured to receive another manipulation which operates the striking mechanism;

a contact lever that is configured to operate according to operations of the trigger and the contact arm and that is configured to switch operating states of the striking mechanism; and

a regulator that is configured to regulate a movement of the contact lever in a range from an operable position where the striking mechanism is operable by the contact lever to an operation standby position where the contact lever is operable by the contact arm, according to a reciprocating movement of the contact arm, and that is configured to switch operating states of the contact lever according to the contact arm, wherein the regulator includes:

a regulation member that is configured to regulate the movement of the contact lever by moving to a return regulated position where the regulation member regulates a location of the contact lever at the operation standby position;

a moving member that is configured to operate the regulation member; and

a controller that is configured to control moving time of the moving member when the moving member moves from a time measurement starting position to an initial position.

2. The driving tool according to claim 1 , wherein

the controller controls a velocity of the moving member according to a load.

3. The driving tool according to claim 2 , wherein

the load includes at least one of a sliding load and a load according to fluid viscosity.

4. The driving tool according to claim 1 , wherein

the regulator is pressed by the contact arm which moves from an initial position to an operating position where the contact lever is operable, via an operation in which the contact arm is pressed by a driven member, the moving member moves from the initial position to the time measurement starting position where a measurement of time for regulating the movement of the contact lever starts, and the regulation member regulates the contact lever at the operation standby position by moving to the return regulated position, and

when the contact arm moves from the operating position to the initial position, a pressed state of the moving member is released, and the moving member moves from the time measurement starting position to the initial position with a velocity controlled by the controller, to release a restricted state of the contact lever by the regulation member.

5. The driving tool according to claim 4 , wherein

in a case where the trigger is at an operating position in a state of being pulled and the contact arm is pressed by a driven member again after the contact arm moves from the operating position to the initial position and while the moving member moves from the time measurement starting position to the initial position, the contact arm moves from the initial position to the operating position again to lock with the contact lever, and

the contact lever locked with the contact arm moves from the operation standby position to the operable position to actuate the striking mechanism.

6. The driving tool according to claim 4 , wherein

in a case where the trigger is at an operating position in a state of being pulled and the contact arm is pressed by a driven member again after the contact arm moves from the operating position to the initial position and after the moving member reaches the initial position from the time measurement starting position, the regulation member moves from the return regulated position to an initial position, and

the contact lever moves from the operation standby position to an initial position not to actuate the striking mechanism.

7. The driving tool according to claim 1 , further comprising:

a feed member that is configured to supply a fastener to the nose, wherein

the regulation member moves to the return regulated position by a feeding operation of the feed member to regulate the contact lever at the operation standby position, and

the moving member moves from the time measurement starting position to the initial position with a velocity controlled by the controller, to release a restricted state of the contact lever by the regulation member.

8. The driving tool according to claim 1 , wherein

the operation standby position is a lockable position where the contact lever is locked by the contact arm.

9. The driving tool according to claim 1 ,

wherein, while the moving member moves to the initial position from the time measurement starting position where a measurement of time for regulating the movement of the contact lever starts, a lock portion of the contact lever is on a movement path of a pressing portion of the contact arm.

10. The driving tool according to claim 1 ,

wherein the contact lever is rotatably supported by the trigger.

11. The driving tool according to claim 1 ,

wherein the regulator includes a damper that maintains a state in which the contact lever is located at a lockable position where the contact lever is locked by the contact arm, for a predetermined time period.