JPH05277B2 - - Google Patents

Description

[Detailed description of the invention] (b) Industrial application fields The present invention relates to a bicycle generator.

(b) Conventional technology Conventional bicycle generators, for example,
As described in Publication No. 56-21666, a spring is wound around a mounting shaft with a small gap, and one end is locked to the mounting shaft and the other end is locked to a U-shaped mounting bracket. Therefore, the degree of engagement between this spring and the mounting shaft is weak, and as a result, this mounting shaft tends to wobble when the dynamo is in use. There was a drawback that rattling occurred between the mounting bracket and the insertion hole, resulting in resonance noise.

(c) Problems to be Solved by the Invention Therefore, the present invention is designed to prevent resonance noise from occurring between the mounting shaft and the dynamo holder even if vibrations from the wheels transmitted to the dynamo reach the mounting shaft. The purpose is to

(d) Means for Solving the Problems The present invention provides a method for inserting the arm shaft of a dynamo, which can be raised and lowered so as to approach and separate from the wheel, into a pair of through holes formed in a dynamo holder provided on the bicycle body. The dynamo is pressed against the axle by the biasing force of a spiral spring that is supported, wound around the arm shaft, and that has one end locked to the arm ring and the other end locked to the dynamo holder, wherein the spiral spring The spiral part is characterized by a structure in which the inner diameter is smaller than that of the other spiral parts so that both ends of the spiral part are pressed against the outer circumferential surface of the arm shaft.

(e) Effect Because of this configuration, the dynamo is used in pressure contact with the wheel, and the arm shaft of the dynamo is held in the dynamo holder via a spiral spring, so vibrations are transmitted to the arm shaft. Also, there is no resonance sound generated between the arm shaft and the through hole of the dynamo holder.

(F) Embodiment 1 is a dynamo holder fixed to a bicycle body, and mounting pieces 2, 2 facing each other are formed by bending at the upper part. A through hole 3 is bored in the mounting pieces 2, 2. Reference numeral 4 denotes a dynamo that can be raised and lowered so as to approach and separate from the wheels, and has an arm shaft 5 protruding from its side surface that is inserted into the through holes 3 and 3 so as to be rotatable. Reference numeral 6 denotes a spiral spring wound around the arm shaft 5, one end of which is secured to a locking pin 8 which is fixed through the arm shaft 5, and the other end is secured to the inner wall of the mounting piece 2, so that the arm is always The shaft 5 is urged to rotate so that the dynamo 4 is brought into pressure contact with the wheel. Reference numeral 9 denotes a working lever that rotates around the rotating shaft 10, which normally stops the rotation of the arm shaft 5, and when pressed downward, the dynamo 4 is attached to the wheel by the spiral spring 6 as shown by the broken line in FIG. Force.

One end of the spiral spring 6 is locked to the locking pin 8 as described above, and its tip 6a is in contact with the inner wall of the mounting piece 2. The length B of the spiral spring 6 shown in FIG. 1 is made longer than the distance A between the mounting pieces 2, 2 facing each other. The spiral spring 6 is made up of a plurality of spiral parts 10, and the spiral parts 10a and 10b at both ends are made smaller in inner diameter than the other spiral parts 10, and are pressed against the outer peripheral surface of the arm shaft 5. I'm doing it like that. Incidentally, in the conventional spiral spring, a gap was formed with respect to the arm shaft so that the arm shaft could be easily rotated.

According to such a configuration, even if the dynamo 4 vibrates when used in pressure contact with the wheel, the arm shaft 5 and the mounting piece 2 are strongly held through the spiral spring 6. The arm shaft 5 does not vibrate and generate resonance noise between the through holes 3, 3. This corresponds to the spiral portions 1 on both sides of the spiral spring 6.
This is because the arms 0a and 10b are tightly wound around the arm shaft 5, and the ends are stretched so as to spread over the inner walls of the mounting pieces 2, 2.

(G) Effects of the Invention Since the present invention has such a configuration, the arm shaft and the mounting piece are firmly held on both sides of the spiral spring during use, and the vibrations from the dynamo do not cause resonance noise. This can eliminate the situation where noise is generated.

[Brief explanation of the drawing]

Figure 1 is a perspective view of the dynamo holder and spiral spring used in the generator of the present invention, Figure 2 is a front view of the generator, Figure 3 is an explanatory diagram of the operation, Figure 4 is a front view of the spiral spring, and Figure 5 is a front view of the spiral spring. The figure is a right side view of the same, and FIG. 6 is a left side view. 1...Dynamo holder, 3...Through hole, 5...
Arm axis, 6... spiral spring.

Claims (1)

[Claims] 1. A dynamo arm shaft, which can be raised and lowered so as to approach and separate from the wheel, is inserted and supported through a pair of through holes drilled in a dynamo holder provided on the bicycle body,
The dynamo is pressed against the wheel by the biasing force of a spiral spring that is wound around the arm shaft and has one end locked to the arm shaft and the other end locked to the dynamo holder, wherein the spiral portion of the spiral spring A bicycle generator characterized in that the inner diameter of the spiral portion is smaller than that of the other spiral portions so that both ends of the spiral portion are crimped onto the outer circumferential surface of the arm shaft.