| 摘要 |
1,173,216. Steering mechanisms. I. TSUNODA. 13 Dec., 1966 [14 Dec., 1965], No. 55662/66. Heading A6S. The steering mechanism of an electrically driven toy is actuated by a flywheel threaded on a threaded carrier spindle which is rotated by an electric motor; the flywheel is caused to move along the spindle between two limiting positions when the speed of rotation of the spindle is altered and this movement of the flywheel is connected to the steering mechanism by a linkage means. As shown in Fig. 2, when the motor 2 is switched on the flywheel 5, because of its inertia, moves along the spindle 4 to the abutment 6 and power is transmitted from the motor to the left wheel 17a. When the switch 33 is opened the motor slows abruptly and the flywheel moves to the abutment 6a and when the switch is closed moves back to the abutment 6; these movements of the flywheel cause the pawl 22 to advance the ratchet 23 by one tooth. The cam 25, fixed on the same shaft 26 as the ratchet, is rotated and one of its arms B 1 moves from the position shown in full to position B<SP>1</SP>, and the lever 27 moves the clutch shaft 14 in the direction E to engage the pinion 12 with the drive gear 18 whilst maintaining the engagement between the pinion 12a and the gear 18a so that both wheels 17a and 17 are driven by the motor. When the switch 33 is again opened and closed the ratchet 23 is advanced by another tooth and the cam 25 is moved to the position B<SP>11</SP>, whereby the arm B 1 and the lever 27 cause the clutch shaft 14 to disengage the pinion 12a from the gear 18a whilst maintaining the pinion 12 and the gear 18 in engagement; thus drive is provided to the right wheel. During the next off/on operation of the switch 33 the ratchet 23 is advanced to cause the arm B 1 to be disengaged from the lever 27 which is returned by the spring 29 to abut the arm B 3 . The switch 33 may be replaced by a remotely operated switch, operated in response to sound or electromagnetic signals. The drive to the wheels can be provided by a motor separate from the one operating the steering mechanism and a clam coupling or a gear transmission may be provided between the motor 2 and the spindle 4. Fig. 12 illustrates and combined steering and propelling system for a toy boat in which a cam disc 55 attached to the ratchet 23 moves a connecting rod 58 and the tiller of a rudder 59 whilst a propeller 54 is driven by the same motor. InFigs. 13 and 14 (not shown) the steering mechanism of the boat is operated by a rocker 60 and a spring 61 instead of a ratchet. |
