JPH08950U - Folding structure of front wheel fork for folding bicycle - Google Patents

Abstract

(57) [Summary] [Purpose] I would like to easily fold a front wheel fork. [Structure] A bottom blade 26 and an upper blade 28 are fixed above and below an inner pipe inserted into a head pipe 10. The front wheel fork 20 is fixed by these blades 26, 28, and a shoulder piece 32 is fixed to the upper blade 28. The stem 18 is fixed and the latching assembly 30 allows the stem 18 to be fixed and folded between the upper blade 28 and the shoulder piece 32. [Effect] Since the stem 18 can be folded at the portion of the head pipe 10, the stem 18 can be downsized when folded, and can be easily folded and assembled using the latching assembly 30.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a folding structure for a front wheel fork for a folding bicycle.

[0002]

[Prior art]

 It is often desirable to have a foldable wheel that is portable, easy to carry, and retractable. These types of bicycles usually fold along a frame near the seat, which inevitably folds the bicycle in half. Some of them also fold at the stem to make the bike more compact.

[0003]

[Problems to be solved by the device]

 However, in the above known example, the disadvantage of the model of folding the stem is that the stem folds directly over the main pipe of the bicycle, so that the bicycle is not optimally compact. Another drawback is that the structure of the headpipe and front wheel fork is weakened by the addition of collapsible devices.

An object of the present invention is to provide a folding structure of a front wheel fork for alleviating the above-mentioned drawbacks of a collapsible bicycle.

[0005]

[Means for Solving the Problems]

 The folding structure of the folding bicycle front wheel fork according to the present invention is as follows.

1. The bottom brace and the upper brace are attached above and below the inner pipe rotatably inserted in the head pipe, and the front side of the bottom brace is fixed from the rear between the blades of the front wheel fork, and the upper brace is the upper end of the front wheel fork. The stem is extended downward from the handle, and the lower end of the stem is attached to the upper brace via the shoulder piece so that it can be folded only rearward. In addition, the latching assembly for maintaining this state is constructed between the upper brace and the stem. The folding structure of the front wheel fork for a folding bicycle.

2. A front fork consisting of an inner pipe rotatably received therein by way of bearings, a main pipe fixed to the head pipe, two blades and a fork head piece fixed over the upper part of the blades. A blade, and a bottom brace fixedly attached to the inner pipe at its bottom, a first part attached to the fork headpiece, fixed around it by a nut arranged around the inner pipe A brace having a through hole formed therein and a second portion, and fixed to the bottom of the stem and to the second portion of the brace so that the stem is associated with the head pipe. Since it is fixed to the stem and releasably fixed to the above-mentioned upper brace, it can be pivotally rotated so that it can be rotated. And a stem with a handlebar attached to it, whereby the stem is in firm alignment with the head pipe when the latching means is in the fixed position and the latching means is The folding structure for the front wheel fork of the folding bicycle, which is configured so that the stem can be pivoted by the pivoting means described above when in the unlocked position.

[0008]

[Action]

 When riding a bicycle, raise the stem and secure it with the latching assembly. As a result, when the stem rotates by the handle, the inner pipe rotates within the head pipe, and this rotation causes the bottom brace and the upper brace to rotate together, which in turn causes the front wheel fork to rotate. When folding, releasing the latching assembly will cause the stem to fall rearward to a level near horizontal.

[0009]

【Example】

 1 and 2 show an embodiment of the present invention.

The head pipe 10 includes an inner pipe therein, which rotates in a manner of at least a ball bearing (not shown), and the head pipe 10 includes a head pipe 10 in a generally vertical manner. A head fixing ring 16 screwed onto an upper portion of the main pipe 14 and the inner pipe 12 attached to the stem 18, and a stem 18 including a pair of handle bars (not shown) attached to the upper portion thereof, (5) A front wheel fork 20 equipped with an accelerator (not shown) is assembled.

Specifically, a front fork assembly consisting of a pair of blades 22 and a fork headpiece 24 mounted over the upper portions of the blades 22, a bottom brace 26, an upper brace 28, and a latching assembly. It consists of 30. Bottom braces 26 are secured between the blades 22 as well as to the bottom of the inner pipe 12, thereby isolating the blades 22 from the head pipe 10 for a period of time. The upper brace 28 is fixedly attached by its first portion to the upper portion of the fork headpiece 24 and has a through hole (not labeled) formed therein, which the head retaining ring 16 has. Fixed around the upper bottom brace 26, it is received around the top of the inner pipe 12. The bottom brace 26 also overhangs the underside of the head pipe 10 and comprises a second portion to which a shoulder piece 32 mounted to the bottom of the stem 18 is pivotally mounted.

Still referring to FIG. 3, the latching assembly 30 is shown in a fixed position and is fixedly attached to the stem 18 and / or the shoulder piece 32 in a spatial relationship to each other. A pair of side portions 34, a handle 36 pivotally mounted to the side portions 34 and receivable therebetween, and a pivotally mounted handle 36, with hooked ends and threaded ends. It essentially consists of a catch 38 with parts.

As shown in FIG. 3, the upper brace 28 has a lip portion 40 formed thereon for holding the hooked end of the catch 38. The tension of the catch 38 retained by the lip 40 is controlled by a dowel 42 pivotally mounted to the handle 38 and a nut 44 threaded onto the threaded end of the catch 38. . The threaded end of the catch 38 passes through the dowell 42 where it is retained by the nut 44. As the nut 44 is screwed further onto the threaded end, the catch 38 is pulled upwards, thereby increasing its tension. A threaded stay 46 may be located below the dowell 42 on the threaded end of the catch 38 to delay unnecessary movement of the catch when the latching assembly 30 is in the unfixed position.

Further, the latching assembly 30 includes a corresponding groove 48 formed in the side portion 34 and a corresponding slot 50 formed in the handle 30 therein. The nail 52 is slidably received in the groove 48 and the slot 50. When the nail 52 is received by both the groove 48 and the slot 50 at the same time, ie, locked as shown in FIGS. 1 and 3, the handle is restrained from movement. When the nail 52 is moved out of the slot 52, ie unlocked as shown in FIG. 2, it becomes pivotable.

As shown in FIG. 1, when the latching assembly 30 is in the fixed position, the stem 18 is firmly held upright and aligned with the head pipe 10. From FIG. 2, the stem 18 is pivotable with respect to the bicycle when the latching assembly 30 is in the unlocked position. The second position of the brace 28, in the preferred embodiment, is positioned at an angle with respect to its first portion, i.e., about 45 degrees. This angle allows the stem 18 to pivot with respect to a position below the height of the main pipe 14, more so than if the stem 18 were to be pivoted directly in alignment with the main pipe 14. It can be folded up.

[0016]

[Effect of device]

 The effects of the present invention are as follows.

A. The inner pipe is inserted into the head pipe, the bottom brace and the upper brace are attached above and below this, and the upper part of the front wheel fork is fixed by this brace, so it is strong.

B. Since the shoulder piece was fixed to the lower part of the stem and this shoulder piece was attached to the upper brace so that it could be folded only backward, the stem could be folded backward at the head pipe portion. Therefore, when the bicycle is folded, the outer shape becomes smaller, which makes it easier to carry and store.

C. The latching assembly allows the stem to be fixed and released easily, which is convenient when folding and assembling.

D. Since the structure is simple, it can be provided at low cost.

[Brief description of drawings]

FIG. 1 is a perspective view of a front wheel fork and a foldable stem device.

FIG. 2 is a perspective view of a state in which the stem is folded.

FIG. 3 is a partial cross-sectional view showing a latching assembly.

[Explanation of symbols]

 18 Stem 20 Front Wheel Fork 22 Blade 26 Bottom Brace 28 Top Brace 30 Latching Assembly 32 Shoulder Piece

Claims (7)

[Scope of utility model registration request] 1. A bottom brace and an upper brace are attached to the upper and lower sides of an inner pipe rotatably inserted in a head pipe, and the front side of the bottom brace is fixed from the rear between the blades of a front wheel fork, and the upper brace is the front wheel. It is fixed to the upper end of the fork, the lower end of the stem extending downward from the handle is foldably attached only rearward to the upper brace via the shoulder piece, and the stem is set up In this case, the folding structure of the front wheel fork for a folding bicycle is characterized in that the latching assembly for maintaining this state is formed between the upper brace and the stem. 2. An inner pipe rotatably received therein by means of a bearing, a main pipe fixed to a head pipe, two blades and a fork headpiece fixed over the tops of the blades. A front fork consisting of: the blade, and a bottom brace fixedly attached to the inner pipe at its bottom, a first portion attached to the fork headpiece, a nut arranged around the inner pipe and A through hole that is fixed on and is formed there, and a second
Fixed to the bottom of the stem and to the second portion of the brace to allow the stem to pivot with respect to the head pipe, and to the stem. A latching means releasably affixable to the upper brace of the stem and a stem with a handlebar attached to it, whereby when the latching means is in the fixed position, the stem is a head pipe. When tightly aligned and the above latching means are in the unlocked position,
A folding structure for a front wheel fork for a folding bicycle, wherein the stem is configured to be pivotable by the pivoting means. 3. The pivoting means as described above is arranged at an acute angle with respect to the main pipe, whereby the stem is pivotable below the height of the main pipe when the stem is pivotally supported. A folding structure for a front wheel fork for a folding bicycle according to claim 2. 4. A pair of side portions fixed to the stem in a spaced relationship to each other, and the latching means pivotally mounted to the side portions. A handle placed between them,
It consists of a catch pivotally mounted on the handle, with a hooked end, and a lip formed on the upper brace, whereby the latching means is in the fixed position. In some cases, the hooked end is retained by the lip, the handle is received between the side portions, and further, when the latching means is in the unlocked position, the handle is The folding structure for a front wheel fork according to claim 2, further comprising a stem pivoted outwardly from the stem, and the hooked end is free from the lip. 5. The hooking end according to claim 5, wherein the latching means further comprises a dowell pivotally mounted to the handle, the catch being able to pass through the dowell. With a threaded end on the opposite side of the section, the nut is screwed onto the threaded end so that when the nut is tightened, the catch is tightened against the lip. The folding structure for a front wheel fork for a folding bicycle according to claim 4, wherein 6. The latching means herein further comprises a locking means therein, whereby the latching means is in the locked position when the locking means is locked. The folding structure for a front wheel fork according to claim 4, wherein the latching means can be put into the unlocked position when held and unlocked when the fixing means is unlocked. 7. The fixing means, wherein the fixing means includes a pair of corresponding grooves formed in the side surface portion.
A pair of corresponding slots formed in the handle, and a groove and a nail slidably received in the slot, whereby the nail includes the groove and the slot. 7. The foldable bicycle according to claim 6, wherein the fixing means is locked when both of them are received at the same time, and the fixing means is unlocked when the nail is received only by the groove. Front wheel fork folding structure.