JP7233822B2 - bicycle pedal - Google Patents

Description

The present invention relates to bicycle pedals.

Bicycle pedals, which are widely used today, are composed of a single rotating shaft.

In particular, some stand-up bicycles have pedals composed of two rotating shafts (see, for example, Patent Documents 1, 2, and 3).

Furthermore, a structure in which the length of the front crank is longer than the length of the rear crank has also been proposed (see, for example, Patent Documents 4, 5, and 6).

JP 2006-142921 US-A1-2012/0013097 US-A1-2014/0265218 Utility Model Registration No. 3170287 JP 2015-131575 CN-A-107551461

When a person walks or runs, the heel and toe of the foot are used for different purposes. The heel is mainly used to support the weight transfer using the thigh muscles, and the toes are mainly used to push the body forward by kicking the ground by extending the toes using the calf muscles. Bicycle pedals, which are widely used today, are composed of a single rotating shaft, and cannot effectively utilize the movements of the heel and the toe separately, unlike when a person walks or runs.

As in Patent Document 4, the pedal is composed of two rotating shafts, and the length of the front crank is longer than the length of the rear crank, so that the force of shifting weight with the heel and the force of kicking with the toe can be used separately. However, I would like to propose a configuration that can utilize that power more efficiently.

In order to solve the above problems, the product of the present invention is a bicycle in which the force of stepping on the pedal is used to rotate the drive shaft of the rear wheel through a chain or the like to move forward. The pedal rotation shafts are provided in two places, one behind the other, and the same number of teeth are provided separately from the chain wheel for rotating the rear wheel drive shaft so that the two rotation shafts rotate at the same number of rotations. A chain wheel is installed, and a chain is hung between the chain wheels with the same number of teeth so that the front crank is behind the rear crank in phase. A plate for pedals was installed at the tip .

The actions of the above problem-solving means are as follows. First, with the rear crank reaching the upper end, when the rear side of the pedal board is stepped on with the weight on the heel, the pedal starts to rotate.

Next, when the pedal plate is stepped on with the heel until the rear crank reaches the bottom end, the front crank does not reach the bottom end because the phase is delayed, so the front of the pedal plate is kicked down with the toe. Then, when the toe kicks down until the front crank reaches the bottom end, the rotational drive of one leg ends. In this state, the phase of the rotation axis of the rear pedal is advanced, so the tip of the rear crank of the pedal on the opposite foot is already rotated further forward from the upper end, and the opposite foot is You will start rowing from here.

As described above, the present invention features a pedal having two rotating shafts with different crank lengths that are out of phase, and can be used separately for rear heel pedaling and forward toe pedaling motions. At the same time, by shifting the phases of the two rotating shafts, it is possible to use the position of rotating the pedal in a range closer to 90 degrees forward than directly above the rotating shaft of the pedal, where it is easier to take out force than with conventional pedal structures. Therefore, it can be pedaled more efficiently than conventional pedals.

Side view of the first embodiment of the product of the present invention Same explanatory diagram Same explanatory diagram Same explanatory diagram Same explanatory diagram Side view of the second embodiment of the present invention Side view of the third embodiment of the present invention The side view of 4th Embodiment of this invention Side view of the fifth embodiment of the present invention Side view of the sixth embodiment of the present invention

Preferred embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a first embodiment of the invention.

The head pipe 2 is attached to the front end of the body frame 19 by welding or the like, and the drive shaft 14 of the rear wheel 15 is attached to the rear end by screws or the like. A handle 1 is rotatably attached to a head pipe 2. - 特許庁A bifurcated front fork 3 is attached below the handle 1 , and both ends of the rotating shaft of the front wheel 4 are attached to the lower end of the front fork 3 . The steering wheel 1 has two brake levers which are connected to the front wheels 4 and the rear wheels 15 via wires respectively. By pulling the brake levers, the brake device is operated to prevent the front wheels 4 and the rear wheels 15 from rotating. It is made to be able to brake.

The body frame 19 is provided with two front pedal rotating shafts 8 and a rear pedal rotating shaft 13 . A chain wheel 18 is installed on the rear pedal rotating shaft 13 , and a chain 17 is suspended between it and the rear wheel drive shaft chain wheel 16 . Separately from the chain wheel 18, the rear pedal rotating shaft 13 is provided with the rear chain wheel 10 and the front pedal rotating shaft 8 with the front chain wheel 5 having the same number of teeth in order to equalize the number of revolutions of the front and rear pedals. The chain 9 is suspended so that the phase of the front crank 6 lags behind the rear crank 12 by about 45 degrees.
The front cranks 6 mounted on the front pedal shaft 8 are longer than the rear cranks 12 mounted on the rear pedal shaft 13 . The rear end of the pedal plate 11 on which the foot rests is connected to the tip of the rear crank 12 so as to rotate freely. The front end of the pedal plate 11 is connected to the tip of the front crank 6 via an arm 7 whose both ends are freely rotatable .

The bicycle according to the first embodiment of the present invention can be constructed as described above. By holding the handle 1 with both hands and pedaling the left and right pedal plates 11 with both feet, the rear wheel 15 can be rotated. The direction of travel can be changed by rotating the bicycle to make it run, and by operating the handle 1 to control the direction of the front wheel 4 .

2, 3, 4, and 5 are explanatory diagrams of a series of operations from the start of stepping on the pedal with the left foot to the end of stepping on the pedal in the first embodiment of the present invention. The black arrows in the figure represent the direction and magnitude of the forces acting on the two rotating shafts.

First, as shown in FIG. 2, when the rear crank 12 reaches the upper end and the heel of the left foot starts to step on the pedal plate 11, the rear wheel 15 is rotationally driven as described above, and the vehicle body moves forward, as shown in FIG. and change.

The left heel rolling action continues until FIG. 4 when the rear crank 12 reaches its lower end.

At this time, since the front crank 6 has not reached the lower end, the front crank 6 is rotated by stepping on the pedal plate 11 while extending the toe, and reaching the lower end as shown in FIG. The above is the action of rowing on one leg.

As described above, when the left foot has finished pedaling, the right foot on the opposite side starts pedaling. The rear crank 12 on the side is positioned forward in phase from the upper end. In other words, when one foot finishes pedaling, the other foot always starts pedaling from the position rotated forward from the upper end.

This is because in a structure in which a pedal positioned under the foot is rotationally driven by the foot, the moment of the rotational force increases as the position closer to 90 degrees forward than directly above the rotation axis increases. It has a structure that allows the position to be stepped on to be used in a range close to 90 degrees in front of the rotation axis, indicating that it is more efficient than conventional products.

FIG. 6 shows a second embodiment of the invention. In FIG. 1, the arms 7 are rotatably rigid at both ends, but as shown in FIG.

FIG. 7 shows a third embodiment of the invention. In FIG. 1, the rear wheel drive shaft 14, the front pedal rotation shaft 8, and the rear pedal rotation shaft 13 are driven by two chains 9 and 17, respectively. By installing the front chain wheel 5 with the same number of teeth as the front chain wheel 5 and installing the auxiliary chain wheel 21 for increasing the effective angle at which the chain 17 is suspended on the chain wheel 18, the chain 17 can be configured with one. .

FIG. 8 shows a fourth embodiment of the invention. Although the arm 7 is installed in front of the pedal plate 11 in FIG. 1, the arm 7 can be installed behind the pedal plate 11 as shown in FIG. In this case, the chain 17 can also be composed of one piece.

FIG. 9 shows a fifth embodiment of the invention. Although the arm 7 is installed in front of the pedal plate 11 in FIG. 1, it is also possible to attach a slide mechanism in front of the pedal plate 11 as shown in FIG. Alternatively, the slide mechanism may be attached to the rear of the pedal plate in the opposite manner to that shown in FIG.

FIG. 10 shows a sixth embodiment of the invention . By adding a saddle 20 to the frame 19, the present invention can be used for a seated pedaling bicycle.

1 Handle 2 Head Pipe 3 Front Fork 4 Front Wheel 5 Front Chain Wheel 6 Front Crank 7 Arm 8 Front Pedal Rotation 9 Chain 10 Rear Chain Wheel 11 Pedal Plate 12 Rear Crank 13 Rear Pedal Rotation 14 Rear Wheel Drive Axle 15 Rear wheel 16 Chain wheel 17 for rear drive shaft Chain 18 Chain wheel 19 Frame 20 Saddle

Claims (1)

In bicycles, where the force of stepping on the pedal is used to rotate the rear wheel drive shaft through a chain or the like to move forward, the body frame has two pedal rotation shafts, one at the front near the toe and the other at the rear near the heel. is provided, and chain wheels with the same number of teeth are installed separately from the chain wheel for rotating the drive shaft of the rear wheel so that the two rotation shafts rotate at the same number of rotations, and the chain with the same number of teeth Chains were hung between the wheels so that the front cranks were out of phase with the rear cranks, and the length of the front cranks was set longer than the rear cranks. Pedal mechanism for bicycles.

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