JP6151842B1 - Bicycle crank that can move up and down. - Google Patents

Abstract

Conventionally, there has been no bicycle crank that can move up and down. [MEANS FOR SOLVING PROBLEMS] A pedal shaft (7) and a pedal shaft (5) are connected to an opening (4B) on a lower left and right sides of a member (3C) provided with a compression hydraulic damper (5) inside a crank (1) provided with a member (3C) inside a member (3B). When traveling on an attached bicycle, when a certain load is applied to the pedals 12 and 12A, the member 3C can be moved up and down inside the member 3B by the action of the compression hydraulic damper 5. It is possible to provide a crank 1 that can be moved up and down for a bicycle. [Selection] FIG.

Description

This name 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, the present invention, unlike the conventional bicycle crank, reduces the burden on the knee even at the conventional saddle position by lowering the position of the pedal that is stepped on during bicycle travel, At the time of temporary stop and stop, an attempt is made to solve the problem by using a bicycle crank that can move up and down as a solution that can ensure safety when the toes or soles touch the ground.

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.

The member 3B includes the member 3 and the member 3A, and the member 3C. The member 3C is provided inside the member 3B, and the member 3C moves up and down inside the member 3B. In the pair of bicycle cranks 1 that can be configured, the member 3C is formed in a rectangular shape having a space 8 inside, and an opening 5B for attaching a pedal shaft 11 having a pedal 15 attached to the lower part. And further, an opening 5D for inserting the insertion plate 14 is formed on both sides of the upper and lower surfaces of the rectangular shape, and the member 3B is composed of the member 3 and the member 3A. The member 3B has a rectangular vertical cross section in the longitudinal direction, and the member 3B has a U-shaped vertical cross section.

A mounting portion 6 provided with a rectangular opening 5C in which the compression hydraulic damper 2 can be moved up and down is integrated inside the member 3 inside the U-shape. Further, the upper part of the member 3 is provided with an opening 5 for attaching the crankshaft 4 and the left and right ends of the U-shape are protruded on both left and right sides of the member 3A. And a guide course 12 provided with a recess 14 for inserting a guide 9 provided with a portion 10, and the mounting portion for mounting the compression hydraulic damper 2 provided integrally with the inside of the member 3. The compression hydraulic damper 2 is attached to the opening 5C of the cylinder 6 so as to be movable up and down, and the compression hydraulic damper 2 provided integrally with the member 3 is attached from the lower part of the member 3. The mounting part 6 is connected to the part An opening provided on both sides of the upper and lower surfaces of the member 3C so as to be inserted above the space 8 provided in 3C and further above the upper portion of the compression hydraulic damper 2. The insertion plate 14 is inserted into the part 5D, and the guide 9 of the member 3A is inserted into the guide course 12 of the member 3 from above the opening 5 of the member 3. And a vertically movable bicycle, wherein the pedal shaft 11 to which the pedal 15 is attached is attached to the opening 5B provided at the lower portion of the member 3C. It is a crank.

In the vertically movable crank 1, the opening portions 5 and 5A of the member 3B are attached to the crankshaft 7, and the pedal shafts 11 and 11A are attached to the opening portion 5B of the lower portion of the member 3C. The member 3C provided on the inner side of the member 3B when a pressure exceeding a certain level is applied to the pedals 15 and 15A attached to the left and right of the crank 1 during cycling. A bicycle crank that can be moved up and down by the action of the compression hydraulic damper 2.

When trouble occurs in the compression hydraulic damper 2 in the pair of vertically movable clans 1 described above, the crank 1 is removed from the crankshaft 4 and inserted through the upper opening 5 of the member 3. For the bicycle that can move up and down, the compression hydraulic damper 2 is configured to be replaceable by removing the member 3A and then removing the insertion plate 9 at the top of the member 3C inserted into the member 3B. It is a crank.

The effect of using the above-described vertically movable bicycle crank will be described. Even if it is in the position of the conventional saddle, the knee bends because the position of the pedal that is stepped on when riding the bicycle is lower than the conventional position. The angle increases and the burden is reduced.

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.

Even when used in a normal position, the pedal position to be stepped on is at least 5 cm at the bottom, reducing the burden on the knee, and the soles for both pause and stop By reaching the ground, it is safe on unpaved rough roads, rainy days, heavy rains, and so on.

Further, the crank of the present invention is provided with only one compression hydraulic damper, but the number is not limited.

And, from both left and right side surfaces in the longitudinal direction of the crank constituted by a pair of members 3B and 3E, insertion hydraulic pins are attached by inserting insertion pins. A mechanism for attaching the compression hydraulic damper in the same manner with an insertion pin is also possible and is not limited.

In addition, the bicycle crank can be moved up and down, and can be easily replaced even when trouble occurs in the compression hydraulic damper used.

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 vertically. It becomes.

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

Hereinafter, an embodiment of a vertically movable bicycle crank according to the present invention will be described with reference to FIGS.

FIG. 1 is a front view of a crank 1 configured by inserting a member 3C inside a member 3B composed of members 3 and 3A, and 5 is the member 3 for attaching the member 3B to the crankshaft 7. 4B is an opening 5B for attaching the pedal shaft 11 of the member 3C, and AA 'indicates the direction of the side view of FIG.

2 shows that the member 3C provided with an opening 5B for attaching the pedal shaft 11 to the lower part of the member 3C is inserted into the member 3B inside the member 3B constituted by the members 3 and 3A of FIG. It is a side view which shows the AA 'direction of the crank of FIG. 1 which shows a state, 5 and 5A have shown the opening part for the crankshaft 7 attachment of the said member 3B.

3 shows an opening 5 for attaching the crankshaft 7 to the upper part of the member 3 in the BB ′ direction in FIG. 2 and a DD ′ direction in FIG. It is a top view inside the member 3 which shows the state provided in the character shape. And the opening 5C rectangle of the mounting part 6 for attaching the compression tension hydraulic damper 2 to the inside of the member 3 is provided, and further, the left and right ends of the member 3A of FIG. The projection 9 for the guide 9 is provided with a recess 13 for the guide course 12 for inserting the projection 10 of the member 3A from above the opening 5 of the member 3.

4 is inserted into the opening 5A for attaching the crankshaft 7 to the upper part of the member 3A in FIG. 2, and the recess 13 for the guide course 12 provided at the two left and right ends of the member 3 in FIG. It is a top view which shows CC 'direction which has provided the convex part 10 for guides 9 in two right-and-left front-end | tip parts.

FIG. 5 is a front view showing the member 3C which is inserted from the lower direction of the member 3 shown in FIG. 7 and is provided inside the member 3B. The opening 5B for attaching the pedal shaft 11 to which the 15 is attached and the space 8 provided by inserting the mounting portion 6 with the compression hydraulic damper 2 provided inside the member 3 into the inside are provided. Furthermore, the insertion plate 14 is provided on the upper part of the compression hydraulic damper 2 in which the compression hydraulic damper 2 is mounted on the rectangular mounting portion 6, and a pressure of a certain level or more is applied to the pedal 15 of the member 3C. Is a front view of the member 3C having an opening 5C for inserting the insertion plate 9 into the opening 5D of the member 3C so that it can move up and down simultaneously with the member 3C inside the member 3B. It is.

FIG. 6 shows the compression hydraulic pressure in the inner opening 5C of the mounting portion 6 in which the mounting portion 6 for mounting the compression hydraulic damper 2 to the member 3 shown in FIG. FIG. 5 is a plan view showing a state in which the damper 2 is mounted, 5 is an opening for attaching the crank 7, and 12 and 13 are two left and right portions of the sectional view of the member 3 shown in FIG. 12. They are a guide course 12 provided at the tip and a recess 13 of the guide course 12.

7 shows that the member 3A shown in FIG. 5 is attached to the member 3 in which the compression hydraulic damper 2 is attached to the member 3 of FIG. FIG. 5 is a plan view showing an insertion state provided by insertion, wherein 1 is a crank, 5 is an opening for attaching 3 to the crankshaft 7, and 5B is a pedal shaft to which the pedal 15 of the member 3A is attached. 11 is an opening for attachment, and 12 and 13 are concave portions 13 of a guide course 12 for inserting the convex portion 10 for the guide 9 of the member 3A provided at the upper left and right portions of the member 3, and , 8 is a space portion of the member 3C, and 5C is an opening portion of a rectangular mounting portion 6 to be mounted inside the member 3.

FIG. 8 is a plan view showing a state in which a member 3C provided by being inserted inside the member 3 shown in FIG. 7 is inserted, 5 is an opening for attaching the member 3 to the crank 7, 5B is an opening for attaching the pedal shaft 11 with the pedal 15 attached to the lower part of the member 3C, and 5D is an insertion plate on the upper part of the compression hydraulic damper shown in FIG. 9 is an opening 5D into which 9 is inserted.

FIG. 9 is an enlarged perspective view of the insertion plate 14 to be inserted into the opening 5D provided on both front and back side surfaces of the upper part of the member 3A shown in FIGS.

10, the member 3C is inserted into the inside of the member 3 of FIG. 8 from the lower part, and is provided on the left and right side surfaces of the member 3A shown in FIG. 4 from the upper opening 5 of the member 3. The upper opening 5 is provided with the guide 9 provided with the convex portion 10 and the 11 guide courses 12 provided with the concave portions 13 provided at two positions of the U-shaped left and right end portions of the member 3. 5A is a plan view showing a state of further insertion, 5A is the opening for attaching the crankshaft 7 of the member 3A, and 5B is the opening for attaching the pedal shaft 11 to which the pedal 15 is attached. is there.

FIG. 11 shows a pedal 15 when riding a bicycle by attaching the pedal shaft 11 with the pedal 15 attached to the opening 5B below the member 3C provided to be inserted inside the member 3 in FIG. When a pressure exceeding a certain level is applied to the crank 1, the member 3 C inserted and provided inside the member 3 B is moved downward by the action of the compression hydraulic damper 2. 5 and 5A are side views, which are openings for attaching the crankshaft 7. FIG.

FIG. 12 is an enlarged cross-sectional view showing the direction DD ′ of FIG. 3C is a cross-sectional view showing the lecture 12, 3C is the member provided with the space portion 8, 14 is the insertion plate, and the broken line portion is the compression hydraulic damper below the insertion plate 14. 5C is the opening of the rectangular compression hydraulic damper 2 mounting portion 6 provided integrally with the member 3.

FIG. 13 shows that the crank 1 shown in FIG. 11 is attached to the left and right crankshafts 7 and 7A of the bicycle, and when a certain pressure is applied to the pedals 15 and 15A, the bicycle is inserted into the member 3B. 3C is a front view showing a state in which the member 3C is moved up and down by the action of the compression hydraulic damper 2. FIG.

Unlike conventional cranks, this is a vertically movable bicycle crank that enables the development of bicycles using a new type of crank.

1 is a front view of a crank 1. FIG. The side view which shows the A-A 'direction of the crank 1 of FIG. The top view which shows the B-B 'direction of the member 3A of FIG. The top view which shows the C-C 'direction of the member 3 of FIG. The front view which shows the member 3C provided inside the member 3B. The front view which shows the compression hydraulic damper 2 inside FIG. The front view which inserts member 3C from the lower part of FIG. The front view of the crank 1 which completed the insertion state of FIG. The perspective view of the insertion board inserted in the opening part 4C of FIG. The front view which shows the insertion state of member 3A in the front view of FIG. The side view which shows the state which the pedal 6 moved to the lower part. Sectional drawing which shows the D-D 'direction of FIG. The front view which shows the pedal 12 movement of the pedals 12 and 12A.

Crank 1
Compression hydraulic damper 2
Member 3, 3A, 3B, 3C
Crankshaft 4
Opening 5, 5A, 5B, 5C, 5D
Mounting part 6
Crankshaft 7
Space 8
Guide 9
Convex part 10
Pedal shaft 11, 11A
Guide course 12
Recess 13
Insertion plate 14
Pedal 15, 15A
Direction AA ', BB'C-C'D-D'

Claims (3)

The member 3B includes the member 3 and the member 3A, and the member 3C. The member 3C is provided inside the member 3B, and the member 3C moves up and down inside the member 3B. In the pair of bicycle cranks 1 that can be configured, the member 3C is formed in a rectangular shape having a space 8 inside, and an opening for attaching a pedal shaft 11 having a pedal 15 attached to the lower part. 5B, and further, an opening 5D for inserting the insertion plate 14 on both upper and lower side surfaces of the member 3C, and the member 3B has a rectangular shape in the longitudinal direction, and The vertical cross section in the longitudinal direction of the member 3 is provided in a U-shape, and a rectangular opening 5C in which the compression hydraulic damper 2 can be moved up and down is provided inside the member 3. Is provided A landing portion 6 is provided integrally, and an opening 5 for attaching the crankshaft 4 is provided at an upper portion of the member 3, and left and right sides of the U-shaped member 3 are provided. Both end portions are provided with guide grooves 12 for inserting guides 9 provided on both left and right side surfaces of the member 3A, and the mounting portion 6 provided integrally with the inside of the member 3. The compression hydraulic damper 2 is attached to the opening 5C so as to be movable up and down, and the compression hydraulic damper 2 provided integrally with the member 3 is attached from below the member 3. The mounting portion 6 is inserted inside the space portion 8 provided in the member 3C, and is provided on both upper and lower sides of the member 3C so as to contact the upper surface of the compression hydraulic damper 2. Inserted into the opening 5D 14 is inserted, and the guide 9 of the member 3A is inserted into the guide groove 12 of the member 3 from above the member 3, and is provided below the member 3C. A bicycle crank capable of moving up and down, wherein the pedal shaft 11 having the pedal 15 attached is attached to the opening 5B. When a certain pressure is applied to the pedals 15 attached to the left and right of the crank 1, the member 3 </ b> C provided inside the member 3 </ b> B moves up and down by the action of the compression hydraulic damper 2. The bicycle crank according to claim 1, wherein the bicycle crank is vertically movable. When trouble occurs in the compression hydraulic damper 2 in the pair of vertically movable cranks 1 described above, the crank 1 is removed from the crankshaft 4 and the member inserted from above the member 3 3. The compression hydraulic damper 2 is configured to be replaceable by removing 3A and further removing an insertion plate 14 inserted in the member 3C provided inside the member 3B. Bicycle crank that can move up and down as described.

Images