JP6151839B1 - Bicycle crank that can move up and down - Google Patents

Abstract

Conventionally, there has been no bicycle crank that can move up and down. A pair of cranks constituting an upwardly movable bicycle crank on the inner side of an upper member is attached to upper and lower ends of a hydraulic damper 3 on the upper member 2 of a pair of cranks 9 and 9A. The upper hole 9 is attached to the convex portion 11 provided in the upper member 4 of the member 2, and the other 9A hole is provided inside the opening of the member 2A and outside the member 4A. Provided is a vertically movable bicycle clan that is configured to be movable up and down by the action of the hydraulic damper 3 by inserting and attaching a cylindrical pin 10 from a hole 4C. [Selection] Figure 8

Description

The present invention relates to a bicycle crank that can move up and down.

Previously, there was no bicycle crank that could move up and down.

In the case of a conventional bicycle crank, the only way to reduce the burden on the knee was to raise the saddle position upward.

As a result of this, safety can be ensured when the toes or soles touch the ground at the time of temporary stop and stop.

As described above, unlike the conventional bicycle crank, the present invention reduces the burden on the knee while riding a bicycle and allows the toes or soles to touch the ground during temporary stops and stops. As a solution that can ensure safety, an attempt is made to solve the problem by using a bicycle crank that can move up and down.

In order to solve the above-mentioned problems, the bicycle crank according to the present invention that can move up and down will be described.

A pair of members 2C and a member 2B composed of the members 2 and 2A, and the member 2C is provided inside the member 2B, and the member 2C is configured to be movable up and down. In the bicycle crank 1, the member 2C has a rectangular vertical cross section in the longitudinal direction, an opening 4B for attaching the pedal 6 to the lower portion, and an opening 4C on the inside of the rectangle and the member 2 The stopper 11 is provided with a protrusion 11B for preventing the drop off, the tip of the hydraulic damper 3 is inserted into the opening 4C, and the tension hydraulic pressure is provided on both lateral sides of the longitudinal rectangular shape. A hole 9B for mounting the damper 3 is provided.

The member 2 constituting the member 2B has a vertical U-shaped vertical cross section capable of moving the member 2C up and down, and an opening 4 for attaching the crankshaft 5 to the upper portion, A convex portion 11 for attaching the tension hydraulic damper 3 to the inner upper portion of the U-shape, a guide course 8 provided by inserting the member 2A on the left and right upper surfaces of the U-shaped longitudinal direction, When the member 2C is inserted and provided, the member 2C has a convex portion 11A for the stopper 7 for preventing the member 2C from dropping off, and an opening 4 for attaching the crankshaft 5 to the upper portion. The member 2A provided with the opening 4A for attaching the upper crankshaft 5 to the guide course 8 of the member 2 is formed so that the opening 4 of the member 2 and the opening 4A of the member 2A are integrated. Inserted into the guide lecture 8 from above the opening 4 It is configured to function.

And attached to the convex hole 11 of the member 2 in the upper hole 9 of the tension hydraulic damper 3, and further to the lower hole 9A of the hydraulic damper 3 on the inner side of the member 2C, on both outer side surfaces of the member 2C. It is a bicycle crank that can move up and down, characterized in that a pair of cranks 1 that can be moved up and down are constructed by inserting cylindrical pins into holes 9B provided in the shaft 9B.

Further, the pedal 6 and the pedal 6A are attached to the left and right cranks 1 in the opening 4C provided in the lower part of the member 2C of the crank 1 capable of moving up and down, and the openings of the member 2 and the member 2A are further provided. 4 and the opening 4A are attached to the crankshaft 5, and when the bicycle is applied with a load of a certain level or more, it is attached to the convex portion 11 on the upper part of the member 2 and the member 2C. 2. The vertically movable bicycle crank according to claim 1, wherein the member 2 </ b> C is configured in a pair so that the member 2 </ b> C can move up and down by the action of the tensile hydraulic damper 3 of the member. .

When a trouble occurs in the pair of vertically movable clans 1 described above, the above described vertically movable crank 1 is removed from the crankshaft 5 and inserted into the guide course 5 of the member 2. The member 2A is removed from the member 2 configured to be removable from the guide lecture 8 of the member 2, and the upper protrusion 11 of the member 2 to which the hydraulic damper 3 is attached and The bicycle crank according to claim 1 or 2, wherein an insertion pin of the member 2A is removed and the tension hydraulic damper 3 is replaceable.

Regarding the effect of using the above-described bicycle crank that can move up and down, of course, the effect and expectation value are based on the assumption that the greatest common divisor considering the growth of individual differences and body weight, motor function, etc. It is stated below.

As an example, of course, the ratio of the foot length to the height is naturally different depending on the person, but on the precondition that the average value of a person with a height of around 170 centimeters is assumed, the position of the saddle during running is about 15 from the low position of the saddle. The following description is based on the precondition that one or both of the left and right feet are on the ground at the time of temporary stop and stop when fixed to the upper part of the centimeter.

As shown in FIG. 00, in the case of a light vehicle or a bicycle that is said to be a popular name mamachari, in the crank that can be moved up and down according to the present invention, the crank position at the time of stepping is used in a normal position. Even if it is a case, even if the position of the saddle is lowered by 5 to 6 cm from the conventional 15 cm or so, the burden on the knee does not change because it is at the bottom at a maximum of 5 cm or more. In addition, it is a possible crank that contributes to the improvement of safety on rough roads on unpaved roads, rainy days, heavy rain, etc., by the soles of both feet coming to the ground when stopped.

Further, the crank of the present invention is provided with only one tension hydraulic damper, but the number used is not limited, and an appropriate number may be provided.
Further, the left and right shapes of the member 2C having a longitudinal vertical cross section provided in a rectangular shape may be provided in a curved shape in the outer direction, and the left and right shapes provided in a U-shape are not limited. The member 2C is not limited to be provided in the same shape, and both of them may have an appropriate shape.

Furthermore, although it has the guide lecture 8 for inserting and providing the member 2A in the right and left upper part of the member 2 which comprises the member 2B, as a means to provide the member 2A in the member 2, other means, For example, there is no limitation to using means for providing uneven portions on the left and right surfaces of the member, and providing similar uneven portions on the member 2A and attaching them.

Unlike conventional cranks, the knee angle when the pedal is stepped on while riding a bicycle is increased, thereby reducing the burden on the knees.
Further, even in the case of a bicycle in use, the bicycle crank can be moved up and down, and the crank can be easily replaced.

Even when the position of the saddle of the bicycle currently in use is not changed, the burden on the knee can be reduced because the position of the pedal that is stepped on during traveling is lower than in the past.

Also, especially when a child is on board, it is preferable that one or both feet or soles touch the ground for safety during suspension and stopping, and this is possible with a bicycle crank that can move up and down. It becomes.

As described above, the bicycle crank can be moved up and down to reduce the burden on the knee and ensure safety.

An embodiment of a vertically movable bicycle crank according to the present invention will be described below with reference to FIGS.

FIG. 1 is a front view showing a bicycle crank 1 in which a member 2C is provided inside the member 2B and can be moved up and down by the action of a tension hydraulic damper 3. 2B is a member 2 made up of members 2 and 2A, 2C is a vertically movable member provided inside the member 2B, and 4C is an opening for attaching the pedal 6.

FIG. 2 is a side view showing the A-A ′ direction of FIG. 1. The member 2A shown in FIG. 4 is inserted into the guide course 8 provided on the upper surface of the member 2 in the longitudinal direction U-shaped, and the member 2B is configured. Is a member that moves up and down inside 2B, 4 and 4A are openings attached to the crankshaft 5, 4B is an opening for attaching the pedal 6,

FIG. 3 is an inner plan view showing a state in which a longitudinal vertical section in which an opening 2 for attaching a crankshaft 5 is provided on the upper part of the member 2 in the BB ′ direction in FIG. 2 is provided in a U-shape. It is. Then, a hole 9 at the top end of the tension hydraulic damper is attached to the inner upper part, and a hole 9A at the lower part of the tension hydraulic damper 3 is provided inside the opening 4C of the member 2C. 9B provided on both sides is fixed to the member 2C with a cylindrical pin, and the hole 9 above the tension hydraulic damper 3 is attached to the convex portion 11 of the member 2. The tension hydraulic damper 3 provided inside the member 2 is indicated by a broken line. 4 is an opening for attaching the crankshaft 5, 11 is a convex portion of a stopper for dropping off when moving up and down, and 8 is a guide course for inserting the convex portion 11 of 2A constituting the member 2B. is there.

FIG. 4 is a diagram illustrating a C-C ′ direction in FIG. 2. It is the top view which provided the convex part 11 for insertion in the right and left of the member 2A which inserts in the guide lecture 8 provided in the member 2 from the upper direction, and comprises the member 2B. 4A is an opening for attaching the crankshaft 5,

FIG. 5 shows an opening 4 and 4A of 2 and 2A constituting 2B of the vertically movable bicycle crank 1 shown in FIG. 1 attached to the crankshaft 5 and provided inside the member 2B. When the pedal 6 is attached to the opening 4B of the portion 2C, and a certain load is applied to the pedal 6, the member 2C moves up and down by the action of the tension hydraulic damper 3. is there.

FIG. 6 is a side view showing the direction D-D ′ in FIG. 5. 1 is a member composed of a crank, 2Bha, members 2 and 2A, and 4 and 4A are openings for attaching the crankshaft 5. Reference numeral 2C denotes a member that attaches a pedal 6 to the opening 4B and moves up and down inside the member 2B by the action of the tension hydraulic damper 3 inside the 2B.

FIG. 7 is a side view of the crank 1 attached to the crankshaft 5 of the bicycle. The pedal 6A is moved downward when the pedal 6A is subjected to a load of a certain level or more by the action of the tension hydraulic damper 3 provided in the crank. Indicates a state in which the load is released.

FIG. 8 is a front view of the crank 1 attached to the crankshaft 5 of the bicycle. As in FIG. 7, the pedal 6 </ b> A shows a state where a certain load is applied to the pedal 6 </ b> A by the action of the tension hydraulic damper 3 provided in the crank 1, and the pedal 6 shows a state where the load is released. ing.

11 excludes the member 2A of the crank 1 in which the opening 4 is attached to the right crankshaft 5 shown in FIG. 9, and a member 4C is provided inside the U-shaped opening 4 of the member 2. And the hole 9 of the upper part of the tension hydraulic damper 3 is attached to the convex part 11 provided in the said member 2 inner upper part in the inner upper part of the member 2, and also the said tensile hydraulic damper 3 inside the member 2C is attached. The lower hole 9A is provided by being inserted into the hole 9 at the tip of the tension hydraulic damper 3 from the hole 9B provided on both sides of the member 2C, and the bicycle described in FIG. It is the schematic which shows the state at the time of the pedal 6A moving to the uppermost part by the effect | action of the said tension | pulling hydraulic damper 3 until the pedal 6 at the time of driving | running | working comes to the uppermost position.

Unlike the commonly used crank, it is a vertically movable bicycle crank that can be greatly expected to develop a new type of bicycle.

The front view of the crank 1 which provided the member 2C inside the member 2B. The side view which shows the AA 'direction of FIG. The top view which shows the BB 'direction of FIG. FIG. 3 is a plan view showing a direction C-C ′ in FIG. 2. The front view which shows the state in which the load was added to the pedals 6 and 6A. The side view which shows the DD 'direction of a figure. The side view which shows the state which attached the crank 1 to the crankshaft 5. FIG. The front view which shows the state which attached the crank 1 to the crankshaft 5. FIG.

Crank 1
Member: 2, 2A, 2B, 2C
Tensile hydraulic damper 3
Openings: 4, 4A, 4B, 4C
Crankshaft: 5
Pedals: 6, 6A
Stopper 7, 7A
Guide lecture 8
Hole 9, 9A, 9B
Cylindrical pin 10
Convex 11, 11A, 11B, 11C
Direction AA ′, BB ′, CC ′, DD ′, EE ′, FF ′, GG ′.

Claims (3)

A pair of members 2C and a member 2B composed of the members 2 and 2A, and the member 2C is provided inside the member 2B, and the member 2C is configured to be movable up and down. In the bicycle crank 1, the member 2C has a rectangular shape in the longitudinal direction, and is provided with an opening 4B for attaching the pedal 6 at the bottom, and an opening 4C at the inside. The tip end portion of the tension hydraulic damper 3 is inserted into the opening 4C, and holes 9B for attaching the tension hydraulic damper 3 are provided on both outer side surfaces of the member 2C. The member 2B is also configured. Since the member 2 is provided so that the member 2C can move up and down, the vertical cross section in the longitudinal direction is U-shaped, and the opening 4 for attaching the crankshaft 5 and the member 2C are inserted into the upper part. Above when provided It has a stopper 11 for preventing the member 2C from falling off during dynamic movement, and further has guide grooves 8 provided by inserting the member 2A at the left and right ends of the U-shaped member 2, The member 2A having an opening 4A for attaching the crankshaft 5 to the guide groove 8 of the member 2 is integrated with the opening 4 of the member 2 and the opening 4A of the member 2A. The member 2 is configured to be inserted from above, and the stopper 11 of the member 2 is attached to the upper hole 9 of the tensile hydraulic damper 3, and further, the lower part of the hydraulic damper 3 located inside the member 2C. A vertically movable bicycle crank, characterized in that a pair of cranks 1 that can move up and down are configured by inserting cylindrical pins into holes 9B provided on both sides of the outside of the member 2C. The pedal 6 is attached to the opening 4C provided in the lower part of the member 2C of the vertically movable crank 1, and the opening 4 and the opening 4A of the member 2 and the member 2A are connected to the crankshaft 5. When a fixed load is applied to the pedal during traveling on the attached bicycle, the stopper 11 on the upper part of the member 2 constituting the member 2B and the tension hydraulic pressure attached to the inside of the opening 4C of the member 2C. 2. The vertically movable bicycle crank according to claim 1, wherein the member 2 </ b> C is configured in a pair so that the member 2 </ b> C can move up and down by the action of the damper 3. When trouble occurs in the pair of vertically movable cranks 1 described above, the vertically movable crank 1 described above is removed from the crankshaft 5 and inserted into the guide groove 8 of the member 2. The member 2A is removed from the member 2 configured to be detachable from the guide groove 8 of the member 2, and the cylinder inserted into the stopper 11 and the member 2C above the member 2 from the tensile hydraulic damper 3 The bicycle crank according to claim 1 or 2, wherein a pin is removed and the tension hydraulic damper (3) is replaceable.

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