Patent ID: 9744949
Date: 2017-08-29
CPC Classifications: A61H,B60T,B62B,F16D

Claim:
1. A vehicle speed control device for a vehicle whose vehicle body moves due to a wheel rotatably attached to the vehicle body rotating as a result of a person manually pushing the vehicle body and is capable of controlling a speed of the vehicle, comprising: a brake drum that has a tubular portion and is configured to be fixed to the vehicle body; a brake shoe that rotates around a rotary shaft of the wheel and reduces a rotation speed of the wheel with friction by coming into contact with an inner circumferential side face of the brake drum; an elastic member for preventing contact between the brake drum and the brake shoe when the rotation speed of the wheel is lower than or equal to a braking speed, and permitting contact between the brake drum and the brake shoe when the rotation speed of the wheel exceeds the braking speed; a position change mechanism that is installed within the brake drum and changes a position of an end of the elastic member on one end side, wherein the change of the position of the end of the elastic member changes the braking speed; and a transmission mechanism for transmitting a force that is input by an external operation to the position change mechanism and driving the position change mechanism, wherein the position change mechanism has an elastic member position holding portion that holds the end of the elastic member on the one end side, and a drive portion for driving the elastic member position holding portion so as to change the position of the elastic member position holding portion that holds the end of the elastic member, with the force that is input from an outside and transmitted by the transmission mechanism, and the position change mechanism has at least one of a rack-and-pinion mechanism, a link mechanism which comprises a link member rotatably connected to another link member or the elastic member position holding portion at an end of the link member, and a wedge-shaped mechanism with which the elastic member position holding portion is displaced as a result of opposed tapered faces sliding relative to each other.