JPH0266393U - - Google Patents

Description

[Brief explanation of drawings]

FIG. 1 is a side view showing a first embodiment of the biasing structure for a brake lever according to the present invention, FIG. 2 is a rear view thereof, FIG. 3 is a schematic diagram showing the action of a spring in the first embodiment, and FIG. The figure shows a modification of the first embodiment in which a spring is built into the brake lever, FIG. 5 is a side view of the second embodiment of the invention, and FIG. 6 is a schematic diagram showing the action of the spring. , FIG. 7 is a side view showing the third embodiment of the present invention, FIG. 8 is a schematic diagram showing the action of the spring, and FIG. 9 is a side view when the spring of the first embodiment is used in a drop lever. Fig. 10 is a side view when the spring of the second embodiment is used for the drop lever, Fig. 11 is a side view when the spring of the third embodiment is used for the drop lever, and Fig. 12 is a side view showing the conventional configuration. It is. 1...brake lever, 2...fixing member, 3...
...Operation lever, 5...Roller, 6...Cam surface, 7...
... Operating member, 8... Follower piece, 10... Coil spring, 20... Brake means, 30... Brake wire, H... Handle.

Claims (1)

[Claims for Utility Model Registration] (1) A brake means for braking a braked member such as a wheel by being biased in the return direction by rotation of an operating lever pivotally connected to a fixed member fixed to a handle. In a brake lever biasing structure that includes a spring in the brake lever that applies braking against the biasing force in the return direction of the means and biases the rotation of the operating lever, one point of action of the spring biased in the approach direction is fixed. The fixed member and the other point of action are connected to the operating lever, and the pivot points of the fixed member and the operating lever are lined up on a straight line that connects the acting points on both sides of the spring at a midway position in the rotation locus of the operating lever. A brake lever biasing structure characterized in that the spring has a neutral position in which the biasing force of the spring does not act on the operating lever, and that each spring is biased in the rotational direction of the operating lever from the neutral position. (2) The spring is made of a coil spring,
A coil spring biased in the contraction direction is stretched between the fixed member and the operating lever, and when the operating lever is rotated from a neutral position in the middle of the rotation stroke of the operating lever in the tightening direction or return direction, the coil spring is 2. The brake lever biasing structure according to claim 1, wherein at least one connection point is displaced in the rotational direction of the operating lever to bias the operating lever in the rotational direction. (3) A roller is interposed between the coil spring and the connection between the fixed member or the operating lever, and the roller slides along a cam surface formed on the fixed member to increase the amount of displacement of the spring. Claim 1
The biasing structure of the brake lever described. (4) When the coil spring rotates the operating lever from the neutral position in the tightening direction or the returning direction, both points of action of the coil spring are displaced in the rotational direction of the operating lever and bias the operating lever in the rotational direction. A brake lever biasing structure according to claim 2, characterized in that: (5) One end of the coil spring is interlocked with the operating lever and connected to the outer end of the actuating piece which is pivotally connected at the pivot point of the fixed member and the operating lever, and the other end of the coil spring is interlocked with the outer end of the actuating piece which is pivotally connected to the fixed member and the operating lever at the pivot point. 5. The brake lever biasing structure according to claim 4, wherein the driven piece is pivotally connected to the inner end and has a middle portion connected to the tip of the driven piece which is pivotally connected to the fixed member. (6) The brake lever biasing structure according to claim 1, wherein the coil spring is built into the hollow of the fixing member and the operating lever.