WO2015080369A1

WO2015080369A1 - Stem for bicycle, having handlebar of which position is changeable

Info

Publication number: WO2015080369A1
Application number: PCT/KR2014/008451
Authority: WO
Inventors: 이재용
Original assignee: 이재용
Priority date: 2013-11-26
Filing date: 2014-09-11
Publication date: 2015-06-04
Also published as: KR102154358B1; KR20150060426A; JP2016537263A; CN105764785B; JP6417423B2; CN105764785A

Abstract

The present invention relates to a stem for a bicycle which interconnects a fork tube equipped with a steering wheel and a handle bar configured to control the direction of the steering wheel, the stem for a bicycle having a handlebar of which the position is changeable, comprising: a first fixture connected to the upper part of the fork tube; a second fixture connected to the central part of the handlebar; and a connector provided between the first fixture and the second fixture, wherein the connector is spun to position the central axis of the second fixture so as to reduce the angle between the central axis of the first fixture, perpendicular to the ground, and the central axis of the second fixture, which are perpendicular to each other, thereby enabling the handlebar to be positioned adjacent to the fork tube when storing a bicycle.

Description

Bicycle stem for repositioning the handlebars

The present invention relates to a bicycle stem that can change the position of the handle bar, and more particularly, by keeping the handle bar side by side in the fork tube when storing the bicycle regardless of the type of the bicycle stem stably the convenience of storage A bicycle stem that can be repositioned to improve handlebar position.

With the social movement to use bicycles as a way to solve the environmental pollution problem caused by automobiles today, the demand for bicycles is increasing as the popularity of bicycles is rapidly rising as leisure sports.

By the way, although the space for storing the bicycle should be increased enough as the demand increases, the space for storing the bicycle is still small, and thus, a method of changing the structure of the bicycle at the time of storage is different from the structure of the bicycle at the time of driving. have.

In one of these ways, by changing the structure of the bicycle stem, which interconnects a fork tube equipped with steering wheels and a handle bar provided for adjusting the direction of the steering wheels, When storing bikes, the handlebars can be placed side by side with the steering wheel and the rolling wheel.

However, the method of changing the structure of the bicycle stem and placing the handlebars in parallel with the steering wheel and the rolling wheel has the following limitations due to the structure of the bicycle stem, which is practically the most convenient way to store the bicycle. It is not becoming.

That is, in the case of a conventional quill type bicycle stem as shown in FIG. 1, the handlebar can be placed side by side with the rolling wheel, but can never be placed side by side with the steering wheel which rotates with the handlebar. Therefore, the conventional quill type bicycle stem cannot use the above-described method itself.

In addition, in the case of a conventional threadless bicycle stem as shown in Figs. 2 and 3, the handle bar can be placed in parallel with the steering wheel and the rolling wheel by rotating the part connected to the fork tube. However, since the direction of rotating the part connected with the fork tube is the same as the direction in which the steering wheel is controlled, there is a high possibility of a safety accident unless the engagement is very tight after the part connected with the fork tube is rotated. The aforementioned method is not readily available.

The technical problem of the present invention is to solve the problems described above, regardless of whether the type of the bike stem is quill type or threadless type, stable by placing the handlebar side by side in the fork tube when storing the bicycle It is to provide a bicycle stem that can change the position of the handlebar to improve the convenience of storage.

The technical problem to be achieved by the present invention is not limited to the technical problem mentioned above, and other technical problems not mentioned above may be clearly understood by those skilled in the art from the following description. There will be.

The technical problem, according to the present invention, as a stem for a bicycle (stem) for interconnecting a steering wheel (fork tube) equipped with a steering wheel and a handle bar provided for adjusting the direction of the steering wheel, A first fixture connected to an upper end of the fork tube; A second fixture connected to a central portion of the handle bar; And a connector provided between the first fixture and the second fixture; wherein the connector is rotated so that a vertical angle between the center axis of the first fixture perpendicular to the ground and the center axis of the second fixture is By positioning the central axis of the second fastener to be reduced, it can be achieved by a reversible bicycle stem, characterized in that the handlebar can be placed adjacent to the fork tube when storing the bicycle. .

Here, the size of the reduced angle between the central axis of the first fastener and the central axis of the second fastener may be 70 to 90 degrees.

In addition, the connector includes a first extension portion extending from the side of the first fastener and formed in a cylindrical shape, and a second extension portion extending from the side of the second fastener and formed in a cylindrical shape, wherein the first extension portion and the One of the second extensions may be inserted into and connected to the other.

At this time, the connector, the first extension portion and the second extension portion in contact with the outside so as to prevent the second extension portion from rotating relative to the first extension portion irrespective of the user's intention The projections may be interlocked.

Herein, the plurality of protrusions may be separated from the protrusions facing each other when the connector is rotated to face the other protrusions, but may be repeated four times or less.

On the other hand, the stem for a bicycle that can change the position of the handle bar according to the present invention, the first extension portion to prevent the second extension portion from rotating relative to the first extension portion regardless of the user's intention And a locking unit for maintaining the second extension part and the interconnected state.

In this case, the locking unit may include a tightening shaft crossing the first extension part and the second extension part along a central axis of the first extension part and the second extension part, and an adjustment screw mounted to one end of the tightening axis; And a direct tightening clamp including a tightening lever mounted on the other end of the tightening shaft, and when the tightening lever is operated, a portion of the first extension part positioned between the tightening lever and the adjusting screw on the tightening shaft; A portion of the second extension part may be in close contact with each other to maintain the first extension part and the second extension part connected to each other.

Further, the direct tightening clamp may be configured to prevent the state in which the first extension part and the second extension part are disconnected from each other as the tightening lever is operated regardless of the user's intention. It may further include a hook to secure the tightening lever to the first extension portion or the second extension portion to prevent operation.

The locking unit may further include a tightening shaft crossing the first extension part and the second extension part along a central axis of the first extension part and the second extension part, and a first screw part mounted at one end of the tightening axis; And a direct-tight biaxial screw including a second threaded portion mounted to the other end of the tightening shaft, wherein when one of the first threaded portion and the second threaded portion is tightened, it is positioned between the first threaded portion and the second threaded portion. A portion of the first extension portion and a portion of the second extension portion are in close contact with each other to maintain the first extension portion and the second extension portion.

In addition, the locking unit is composed of a wedge-shaped through screw penetrating across the side portion of the first extension portion and the side portion of the second extension portion and restraining the first extension portion and the second extension portion. The first extension part and the second extension part may be connected to each other by closely contacting the side part of the first extension part with the side part of the second extension part through a through screw.

In addition, the locking unit is composed of a fastening screw for connecting the first flange protruding on the side of the first extension portion and the second flange protruding on the side of the second extension portion, and through the fastening screw By adhering the second flange closely, the first extension part and the second extension part may be maintained in a mutually connected state.

The locking unit may further include: a tightening shaft intersecting the third and fourth flanges protruding in a pair from one side of the first extension portion and the second extension portion, which are not inserted at regular intervals; It is composed of an indirect tightening clamp including an adjustment screw mounted on one end of the tightening shaft and a tightening lever mounted on the other end of the tightening shaft. When the tightening lever is operated, the tightening lever and the adjustment on the tightening shaft are controlled. By contacting the third flange and the fourth flange positioned between the screws, the outer peripheral surface of any one of the first extension part and the second extension part, which is not inserted, is reduced to reduce the first extension part and the second extension part. Extensions can remain interconnected.

The locking unit may further include: a tightening shaft intersecting the third and fourth flanges protruding in a pair from one side of the first extension portion and the second extension portion, which are not inserted at regular intervals; Indirect fastening type biaxial screw comprising a first threaded portion mounted to one end of the tightening shaft and a second threaded portion mounted to the other end of the tightening shaft, and tightening any one of the first threaded portion and the second threaded portion, By contacting the third flange and the fourth flange positioned between the first threaded portion and the second threaded portion, the outer circumferential surface of any one of the first extended portion and the second extended portion not inserted is reduced, thereby The first extension part and the second extension part may be connected to each other.

On the other hand, the bicycle stem which can change the position of the handle bar according to the present invention, when the second extension is rotated relative to the first extension in accordance with the user's intention, the first extension and the second extension In order to reduce the frictional force generated between the parts, provided between the inner end of any one of the first extension and the second extension, which is not inserted, and the outer end of the other inserted opposite to the inner end. It may further include a spring.

In addition, in the stem for a bicycle that can change the position of the handle bar according to the invention, the locking unit is connected between the one side connected to the first extension and the other side connected to the second extension in a loop form, And a direct tightening unit including a wire on which an outer circumferential surface of the second fastener is disposed around an inner circumference of the loop, and a control lever mounted on the other side of the wire, and the length of the wire decreases when the control lever is operated. Accordingly, the loop between one side and the other side of the wire is shortened, so that the first extension part and the second extension part can be kept connected to each other.

According to the bicycle stem which can change the position of the handle bar according to the present invention as described above, regardless of whether the type of the bicycle stem is quill type or threadless type, when storing the bicycle handle bar side by side to the fork tube This allows you to reposition the handlebars to reliably improve the convenience of storage.

1 is a perspective view showing a conventional quill (Quill) type bicycle stem.

2 and 3 are perspective views showing a conventional threadless bicycle stem.

Figure 4 is a front view illustrating the principle of operation of one embodiment of a bicycle stem that can change the position of the handle bar according to the present invention.

Figure 5 is a cross-sectional view showing one embodiment of a bicycle stem that can change the position of the handle bar according to the present invention.

6 and 7 are cross-sectional views showing a modification of the embodiment shown in FIG.

8 is a cross-sectional view showing another embodiment of a bicycle stem that can change the position of the handle bar according to the present invention.

9 and 10 are cross-sectional views showing a modification of another embodiment shown in FIG. 8.

FIG. 11 is a partial cross-sectional perspective view of a modification of the configuration of the configuration illustrated in FIG. 10.

12 is a partial cross-sectional perspective view illustrating the hook for preventing the tightening lever of the direct tightening clamp of FIG. 11 from being released.

13 to 17 are cross-sectional views showing another embodiment of the stem for a bicycle that can change the position of the handle bar according to the present invention.

FIG. 18 is a cross-sectional view illustrating a modification example of still another embodiment illustrated in FIG. 17.

19 to 21 is an operational state diagram for explaining the operation of one embodiment of a stem for a bicycle that can change the position of the handle bar according to the present invention.

1: fork tube

2: handlebar

3: accessory holder

10a: conventional quill type bicycle stem

10b: conventional threadless bicycle stem

100: first fastener

200: second fixture

300: connector

310: first extension part 320: second extension part

330: multiple projections

400: locking unit

410: direct tightening clamp 420: direct tightening double shaft screw

430: through screw 440: tightening screw

450: indirect tightening clamp 460: indirect tightening double shaft screw

500: spring

600: Direct Fastening Unit

610: wire 620: wire connector

630: wire control 640: adjustment lever

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, in the following description of the present invention, a description of a known function or configuration will be omitted to clarify the gist of the present invention.

In addition, terms indicating the direction, such as forward, rear or upper side and lower side in describing the present invention indicate relative directions as those described in order for those skilled in the art to clearly understand the present invention, and thus the scope of the right is limited. It will not be.

First, with reference to FIG. 4, the basic configuration and operating principle of embodiments of the bicycle stem that can change the position of the handle bar according to the present invention will be described.

4 is a front view illustrating the principle of operation of embodiments of the stem for a bicycle that can change the position of the handle bar according to the present invention.

As shown in Figure 4, one embodiment of the stem for a bicycle that can change the position of the handle bar according to the invention comprises a first fastener 100, a second fastener 200, a connector 300 do.

The first fixture 100 is a component connected to the upper end of the fork tube (1) equipped with a steering wheel (front wheel), as shown in the figure along the outer peripheral surface of the upper end of the fork tube (1) It may be connected to the upper end of the fork tube 1 in a fitted manner, or may be connected to the upper end of the fork tube 1 in a manner that covers the entire upper end of the fork tube 1 although not shown in the drawing. That is, the first fixture 100 may vary in shape and structure, including a connection method, provided that the first fixture 100 is connected only to the upper end of the fork tube 1.

On the other hand, the second fastener 200 is a component connected to the central portion of the handle bar 2, which is also connected to the central portion of the handle bar 2 like the first fastener 100, including a connection method. There is no restriction on the shape and structure.

On the other hand, the connector 300 is provided between the first fastener 100 and the second fastener 200 as a component for rotatably connecting the first fastener 100 and the second fastener 200, the first fastener As long as the 100 and the second fixture 200 are rotatably connected to each other, shapes and structures thereof may also be varied.

However, since the connector 300 occupies an important part in explaining the operation principle of the present invention, for example, for more detailed description, the connector 300 extends from the side of the first fixture 100 and is cylindrical. It may be configured to include a first extension portion 310 and a second extension portion 320 formed in a cylindrical shape extending from the side of the second fastener 200, wherein, the first extension portion 310 and Any one of the second extensions 320 may be inserted into any other and rotatably interconnected.

Embodiments of the bicycle stem that can change the position of the handle bar 2 according to the present invention configured as described above, as the connector 300 is rotated about the central axis (B), the first perpendicular to the ground The central axis of the second fastener is positioned with the vertical angle between the central axis A of the fastener 100 and the central axis of the second fastener 200 reduced, so that the handlebar 2 when storing the bicycle. Can be placed adjacent to the fork tube 1.

That is, in the case of a conventional bicycle stem, as described in the background art of the present invention, the handle bar 2 is to be rotated based on the central axis A of the first fastener 100. The bicycle stem was not capable of rotating the handlebar itself, and the threadless bicycle stem was unstable even when the handlebar 2 was rotated.

However, the second fixture 200 connected to the second extension part 320 rotates by rotating the second extension part 320 with respect to the first extension part 310 based on the central axis B. Accordingly, the handle bar 2 connected to the second fixture 200 may be positioned adjacent to the fork tube 1.

At this time, the handle bar (2) and the fork tube (1) will be said to be ideal if it is located side by side, but in some cases the end of the handle bar (2) due to the angle, length, width, etc. If the steering wheel is caught, it may occur. In some cases, the handle bar 2 and the fork tube 1 may not be located side by side.

As described above, even if the handle bar 2 and the fork tube 1 are not positioned side by side, it is possible that the handle bar 2 protrudes 150 mm or more with respect to the fork tube 1 without departing from the spirit of the present invention. Will see.

Therefore, if the width of the handle bar 2, which is generally used, is 620 mm, the length of the handle bar 2 is 310 mm, and when the handle bar 2 is turned, the width of the handle bar 2 protruding from the fork tube 1 is within 150 mm. An angle of about 70 degrees is appropriate to achieve this. Thus, the angle at which the handle stem is fixed, that is, the reduced angle between the central axis of the first fixture 100 and the central axis of the second fixture 200, is advantageously 70 to 90 degrees.

Embodiments of the stem for a bicycle that can change the position of the handle bar according to the present invention having the configuration and operation principle as described above are described in the connection relationship between the first extension part 310 and the second extension part 320. The only difference between the locking unit 400 and the spring 500, and the shape and structure of the spring 500, and the like, the operation and the principle of operation as described above will be said to be substantially the same.

5 to 18, the configuration of various embodiments of the stem for a bicycle that can change the position of the handlebar according to the present invention having the basic configuration and operation principle as described above will be described next.

5 is a cross-sectional view showing an embodiment of a stem for a bicycle that can change the position of the handle bar according to the present invention, Figure 6 and Figure 7 is a cross-sectional view showing a modification of the embodiment shown in FIG. to be. On the other hand, Figure 8 is a cross-sectional view showing another embodiment of a bicycle stem that can change the position of the handle bar according to the present invention, Figures 9 and 10 show a modification of another embodiment shown in FIG. One cross section. On the other hand, Figures 13 to 17 is a cross-sectional view showing another embodiment of a stem for a bicycle that can change the position of the handle bar according to the invention, Figure 18 is a modification of another embodiment shown in FIG. It is a cross-sectional view.

First, one embodiment of a bicycle stem that can change the position of the handle bar according to the present invention is as shown in Figs.

That is, one embodiment of the bicycle stem that can change the position of the handle bar according to the present invention is different from the other embodiments, which will be described later, the locking unit 400 and the spring 500 is not included Basic embodiment.

However, compared to the configuration of the embodiment of the stem for a bicycle that can change the position of the handle bar according to the present invention a plurality of projections 330 is further included-Of course, the projection 330 is also shown in Figure 4, Not mentioned above. And with respect to the positional relationship of the first extension 310 and the second extension 320.

That is, in one embodiment of the stem for a bicycle that can change the position of the handle bar according to the present invention a plurality of protrusions 330 in the portion where the first extension portion 310 and the second extension portion 320 in contact with the outside The plurality of protrusions 330 are provided to be engaged with each other.

As described above, the plurality of protrusions 330 may be engaged with each other to prevent the second extension 320 from rotating based on the first extension 310 regardless of the user's intention.

To describe the opposite situation for a more detailed description, when the second extension 320 is to be rotated based on the first extension 310 according to the user's intention, the first extension 310 inserted is inserted. ) Or the second extension part 320 to be pulled to prevent the plurality of protrusions 330 from engaging with each other.

Based on the above description, the case in which the second extension 320 rotates based on the first extension 310 will be described in more detail. When the second extension 320 rotates, a plurality of protrusions 330 will be described. The projections that faced each other in) are separated from each other and face each other.

However, if the number of the protrusions 330 is too large, the size of each of the protrusions 330 decreases, so that the fastening force may be reduced, and the protrusions 330 may be damaged, and the handle bar 2 may be moved at an angle desired by the user. It will be difficult to fix it by turning it correctly.

Therefore, when the handle bar 2 is to be fixed in the state of returning to the range of 70 degrees to 90 degrees as described above, it is advantageous that the number of the protrusions 330 turns to be 4 or less. In other words, the plurality of protrusions 330 are separated from the protrusions facing each other when the connector 300 rotates to face the other protrusions, which is advantageously repeated four times or less.

In addition, as described above, while the number of the protrusions 330 is four or less, the optimum number of protrusions for maintaining the fastening force and strength of the protrusions 330 as described above can be confirmed in Table 1 below. 5, 9, 10, 11, 13, 14, 15, 16, 17, 18, 19, 20 as will be appropriate, these experimental results may vary slightly depending on the experimental conditions the scope of the present invention Of course, this is not a limitation.

Table 1

Number of protrusions (pcs)	Number of turnings around ()	Handlebar Fixed Angle (degrees)
5	One	72
9	2	80
10	2	72
13	3	83
14	3	77.1
15	3	72
17	4	84.7
18	4	80
19	4	75.8
20	4	72

In addition, in one embodiment of the bicycle stem that can change the position of the handle bar according to the invention, as shown in Figure 5 so that the second extension portion 320 is inserted into the first extension portion 310, Although it may be configured, bicycle-related accessories as shown in FIG. 7-today, smartphones also replace bicycle-related accessories. 6, the first extension part 310 is inserted into the second extension part 320 as shown in FIGS. 6 and 7 so that the accessory holder 3 provided to be attached to the accessory holder 3 can be easily changed according to the type of accessory. It is advantageous to be configured as such.

Next, another embodiment of a bicycle stem that can change the position of the handle bar according to the present invention is as shown in Figs.

That is, another embodiment of the bicycle stem that can change the position of the handle bar according to the present invention, unlike the embodiment as described above is a locking unit 400 as a direct tightening clamp 410 and the spring 500 There are additional technical features in that it is further included.

Here, the locking unit 400 may prevent the second extension 320 from rotating based on the first extension 310 regardless of the user's intention, so that the first extension 310 and the second extension unit 310 may be rotated. Extension 320 is a component that maintains the interconnected state.

The locking unit 400 may vary in shape and structure if it can prevent the second extension 320 from rotating based on the first extension 310 regardless of the user's intention. Naturally, the scope of rights is not limited.

According to the locking unit 400 as described below, the embodiment of the bicycle stem that can change the position of the handle bar according to the present invention may vary, which will be described in detail later, and the handle bar of the present invention In another embodiment of a bicycle stem that can be repositioned, the clamping clamp 410 directly as the locking unit 400 will be described in detail.

As a locking unit 400, the direct clamping clamp 410 directly connects the first extension part 310 and the second extension part 320 along the central axis of the first extension part 310 and the second extension part 320. Tightening shaft 412 across, the adjustment screw 414 is mounted to one end of the tightening shaft 412, and the tightening lever 416 is mounted to the other end of the tightening shaft 412.

At this time, depending on where the region of the first extension portion 310 and the second extension portion 320 that the tightening shaft 412 traverses, and where the tightening lever 416 is located, It is determined whether another embodiment of a bicycle stem that can be repositioned has been modified.

That is, as shown in FIG. 8, the tightening shaft 412 crosses the entirety of the second fastener 200 and the connector 300, and the tightening lever 416 is located at the side of the second fastener 200. If another embodiment of the bicycle stem that can change the position of the handle bar according to the invention, as shown in Figure 9 tightening shaft 412 across the first fixture 100 and the connector 300 as a whole When the tightening lever 416 is located on the side of the first fastener 100 and as shown in FIGS. 10 and 11, the tightening shaft 412 traverses the entirety of the second fastener 200 and the tightening lever 416. When each is located on the side of the second fastener 200 may be referred to as a modification.

According to the direct tightening clamp 410 interconnecting the first extension 310 and the second extension 320 with various structures, the user may extend the first extension 310 and the second extension 320. In the case of maintaining the interconnection state (for example, when driving by bicycle), the user operates the tightening lever 416 to adjust the tightening lever 416 on the tightening shaft 412. A portion of the first extension portion 310 and a portion of the second extension portion 320 positioned between the screws 414 are brought into close contact with each other, such that the first extension portion 310 and the second extension portion 320 are connected to each other. State is maintained.

More specifically, the first extension is more robust as compared to the indirectly fastened clamp 450, which will be described later in another embodiment of a bicycle stem that can change the position of the handlebar according to the present invention. It is advantageous in that the portion 310 and the second extension portion 320 may be maintained in the interconnected state.

That is, compared to the indirect tightening clamp 450 to be described later, according to the direct tightening clamp 410, the interval between the first extension 310 and the second extension 320 is 2 to 3 times shorter, The greater the adhesion will be.

In particular, when the plurality of protrusions 330 as described above are provided, the distance between the first extension part 310 and the second extension part 320 should be greater than or equal to the height of the protrusion 330. In consideration of the direct clamping clamp 410 is advantageous than the indirect tightening clamp 450 to be described later.

On the other hand, the direct tightening clamp 410 is released, the state in which the first extension 310 and the second extension 320 are mutually released as the tightening lever 416 is operated irrespective of the user's intention. In order to prevent this, a hook 418 may be further included to secure the tightening lever 416 to the first extension 310 or the second extension 320 so that the tightening lever 416 cannot be manipulated.

At this time, the hook 418 is limited to its shape and structure as long as the fastening lever 416 is fixed to the first extension part 310 or the second extension part 320 so that the tightening lever 416 cannot be operated. There is no

However, referring to FIG. 12 for a more detailed description, the hook 418 may be formed in a ring shape having elasticity on the side of the tightening lever 416, and the hook 418 formed as described above may be tightened. When tightening the lever 416 is caught while passing over the locking jaw provided in the second extension portion 320 by elasticity, and also when the tightening lever 416 is released, the hook provided in the second extension portion 320 by elasticity The chin goes over and comes out.

Although the hook 418 is described in connection with the direct tightening clamp 410 for convenience of description, it is not necessarily limited thereto, and may be applied to the indirect tightening clamp 450 in some cases.

On the other hand, as an additional technical feature compared to one embodiment of the bicycle stem that can change the position of the handle bar according to the present invention, another embodiment may further include a spring (500).

Here, the spring 500 is between the first extension 310 and the second extension 320 when the second extension 320 is rotated based on the first extension 310 according to the user's intention. It is a component for reducing the friction force generated in the.

That is, the spring 500 is provided between the inner end of any one of the first extension 310 and the second extension 320 which is not inserted and the outer end of the other which is inserted opposite to the first extension. The friction force generated between the 310 and the second extension 320 is reduced.

In other words, referring to FIGS. 8 to 10 as an example of another embodiment of a bicycle stem capable of changing the position of the handle bar according to the present invention, the spring 500 is the outer side of the first extension 310. It is provided between the end portion and the inner end portion of the second extension portion 320 opposite thereto, and the fastening clamp 410 is directly connected to the first extension portion 310 and the second extension portion 320 as the locking unit 400. When releasing the maintenance, the frictional force generated between the first extension part 310 and the second extension part 320 may be reduced so that the rotation of the second extension part 320 may be smoothed.

Next, another embodiment of a bicycle stem that can change the position of the handle bar according to the present invention is as shown in Figures 13 to 18.

That is, another embodiment of the bicycle stem which can change the position of the handle bar according to the present invention is different from one embodiment as described above and another embodiment as the locking unit 400 is replaced with other components There are differences in this respect, but no other technical features are added. Therefore, hereinafter, the locking unit 400 will be described with which other components are replaced for each drawing.

First, according to another embodiment shown in FIG. 13, the locking unit 400 consists of a direct tightening biaxial screw 420.

In this case, the direct tightening biaxial screw 420 is a tightening shaft crossing the first extension part 310 and the second extension part 320 along the central axis of the first extension part 310 and the second extension part 320. 422, a first screw portion 424 attached to one end of the tightening shaft 422, and a second screw portion 426 attached to the other end of the tightening shaft 422.

According to the direct tightening type biaxial screw 420 as the locking unit 400 configured as described above, when any one of the first screw portion 424 and the second screw portion 426 is tightened, the first screw portion 424 and the second screw portion A portion of the first extension portion 310 and a portion of the second extension portion 320 positioned between the 426 may be in close contact with each other, such that the first extension portion 310 and the second extension portion 320 are connected to each other. Will be maintained.

On the other hand, according to another embodiment shown in Figure 14, the locking unit 400 is composed of a through screw 430.

In this case, the through screw 430 penetrates through the side of the first extension part 310 and the side of the second extension part 320 to restrain the first extension part 310 and the second extension part 320. It is a wedge shaped component.

According to the through screw 430, the side portion of the first extension portion 310 and the side portion of the second extension portion 320 are brought into close contact with each other by tightening the through screw 430, whereby the first extension portion 310 and the first extension portion 310 are formed. The two extensions 320 remain connected to each other.

On the other hand, according to another embodiment shown in Figure 15, the locking unit 400 is composed of a tightening screw 440.

At this time, the tightening screw 440 is a type of connecting the first flange 312 protruding to the side of the first extension portion 310 and the second flange 322 protruding to the side of the second extension 320. Component.

According to the tightening screw 440, the first flange 312 and the second flange 322 are in close contact with each other by tightening the tightening screw 440, and thus, the first extension part 310 connected to the first flange 312. And the second extension 320 connected to the second flange 322 are maintained in the interconnected state.

Meanwhile, according to another embodiment illustrated in FIG. 16, the locking unit 400 may be configured as a direct fastening unit 600 including a wire 610 and an adjustment lever 630.

At this time, the wire 610 is connected between the one side connected to the first extension portion 310 and the other side connected to the second extension portion 320 in a loop shape, the outer peripheral surface of the second fastener 200 is disposed around the inner loop The flexible material is a string-shaped component, the adjustment lever 630 is mounted on the other side of the wire 610 is a component for adjusting the length of the wire.

According to the direct fastening type unit 600 configured as described above, when the control lever 630 is operated, the loop between one side and the other side of the wire 610 is shortened as the length of the wire 610 is reduced, so that the first The extension part 100 and the second extension part 200 are kept connected to each other.

In this way, when the locking unit 400 is configured like the fastening unit 600, the handle bar 2 may not be penetrated by including the second fastener 200. Advantageous, of course, if the material of the wire 610 is selected well, it is advantageous in that it may also serve as the above-described spring 500 in some cases.

On the other hand, since relatively large force acts on one side and the other side of the wire 610 connected to the first extension part 100 and the second extension part 200, it is necessary to further strengthen the connection point Bar, the wire 610 is provided on one side of the wire connector 620, the other side of the wire 610 is provided with a wire control port 630, the force acting on one side and the other side of the wire 610 may be dispersed Of course, such a wire connector 620, the wire control 630 is not a component that limits the scope of the present invention.

On the other hand, according to another embodiment shown in Figures 17 and 18, the locking unit 400 is composed of an indirect tightening clamp 450 and a variant of the indirect tightening biaxial screw 460, which is described above Unlike the various locking units 400 shown in another embodiment as described above, the first extension part 310 and the second extension part 320 are connected to each other by indirect tightening instead of direct tightening.

Here, the indirect tightening clamp 450, as shown in Figure 17, any one of the first extension portion 310 and the second extension portion 320 is not inserted (second extension portion 320 in the drawing) Side) of the tightening shaft 452 across the third flange 324 and the fourth flange 326 formed in a pair spaced apart at regular intervals, and an adjustment screw mounted to one end of the tightening shaft 452 ( 454 and a lever 456 attached to the other end of the tightening shaft 452.

According to the indirect tightening clamp 450 configured as described above, the lever 456 is operated according to the user's intention, thereby being located between the lever 456 and the adjustment screw 454 on the tightening shaft 452. As the third flange 324 and the fourth flange 326 are in close contact, any one of the first extension part 310 and the second extension part 320 that is not inserted (not corresponding to the second extension part 320 in the drawing). By reducing the outer circumferential surface of the first extension portion 310 and the second extension portion 320 to maintain a state connected to each other.

At this time, any one of the first extension portion 310 and the second extension portion 320 which is not inserted (corresponding to the second extension portion 320 in the drawing) is not fully cylindrical in view of the material side length. It is advantageous when the outer circumferential surface is reduced to be composed of a partially open cylinder along the direction.

Meanwhile, as shown in FIG. 18, the indirect tightening type biaxial screw 460 includes a tightening shaft 462 crossing the third flange 324 and the fourth flange 326 as described above with reference to FIG. 17. And a first screw portion 464 attached to one end of the tightening shaft 462, and a second screw portion 466 attached to the other end of the tightening shaft 462.

According to the indirectly tightened biaxial screw 460 configured as described above, when one of the first screw portion 464 and the second screw portion 426 is tightened according to the user's intention, the first screw portion 464 and the second screw portion As the third flange 324 and the fourth flange 326 positioned between 426 are in close contact with each other, any one of the first extension part 310 and the second extension part 320 that is not inserted (not shown in FIG. 2) the outer circumferential surface of the second extension part 320 is reduced, so that the first extension part 310 and the second extension part 320 remain connected to each other.

In this case, as described above, any one of the first extension portion 310 and the second extension portion 320 that is not inserted (corresponding to the second extension portion 320 in the drawing) may have a portion along the longitudinal direction. The construction of an open cylinder is advantageous when the outer circumferential surface is reduced.

Finally, with reference to Figures 19 to 21, the operation and effect of one embodiment of a stem for a bicycle that can change the position of the handle bar according to the present invention will be described in detail.

At this time, there are various embodiments as described above with respect to the bicycle stem that can change the position of the handle bar according to the present invention, but the embodiment as shown in Figs. Explain by reference. However, based on the specific embodiments described above, it will be obvious that the scope of the present invention is not limited thereto.

First, when driving using a bicycle, as shown in Figure 19, the first extension portion 310 and the second included in the embodiment of the bicycle stem that can change the position of the handle bar according to the present invention The extension part 320 is in close contact with the plurality of protrusions 330 and remains in an engaged state, and the handle bar 2 is in a state perpendicular to the fork tube 1.

However, when storing the bicycle without using it anymore, as shown in Fig. 20, the direct tightening clamp 410 included in the embodiment of the bicycle stem which can change the position of the handlebar according to the present invention. Pulling the tightening lever 416 of the to extend the gap between the first extension portion 310 and the second extension portion 320 on the tightening shaft 412.

As such, when the distance between the first extension part 310 and the second extension part 320 increases, the second extension part 320 rotates with respect to the first extension part 310 according to a user's intention. This causes the handle bar 2 to rotate relative to the fork tube 1.

When the handle bar 2 is rotated in this way and placed side by side with the fork tube 1 as shown in FIG. 21, the tightening shaft 412 is brought into position by directly returning the tightening lever 416 of the clamping clamp 410. The gap between the first extension 310 and the second extension 320 is narrowed.

As such, when the distance between the first extension part 310 and the second extension part narrows, the second extension part 320 does not rotate relative to the first extension part 310 regardless of the user's intention. The bike can be stored stably.

According to the embodiment of the bicycle stem that can change the position of the handle bar according to the present invention acting as described above, the problem that the present invention was to solve, that is, regardless of whether the type of the stem for the bicycle is quill type or threadless type For example, when storing a bicycle, the handlebars can be placed side-by-side on the fork tube to improve the stability of storage.

While specific embodiments of the present invention have been described and illustrated, it is to be understood that the present invention is not limited to the described embodiments, and that various modifications and changes can be made without departing from the spirit and scope of the present invention. It is obvious to those who have Therefore, such modifications or variations are not to be understood individually from the technical spirit or point of view of the present invention, the modified embodiments will belong to the claims of the present invention.

Claims

A stem for a bicycle interconnecting a fork tube equipped with steering wheels and a handle bar provided for adjusting the direction of the steering wheels,

A first fixture connected to an upper end of the fork tube; A second fixture connected to a central portion of the handle bar; And a connector provided between the first fixture and the second fixture.

Rotate the connector to position the central axis of the second fastener so that the vertical angle between the central axis of the first fastener perpendicular to the ground and the central axis of the second fastener is reduced, thereby restoring the handlebars when storing the bicycle. A reversible bicycle stem, which can be placed adjacent to a fork tube.
The method of claim 1,

And the magnitude of the decreasing angle between the central axis of the first fastener and the central axis of the second fastener is between 70 degrees and 90 degrees.
The method of claim 1,

The connector,

A first extension extending from the side of the first fixture and formed in a cylindrical shape, and a second extension extending from the side of the second fixture and formed in a cylindrical shape,

The stem of claim 1, wherein any one of the first extension and the second extension is inserted into and interconnected with the other.
The method of claim 3,

The connector,

In order to prevent the second extension from rotating about the first extension, regardless of the user's intention, the portion where the first extension and the second extension are in contact with the outside may have a plurality of protrusions engaged with each other. The stem for the bicycle which can change the position of the steering wheel characterized by the feature.
The method of claim 4, wherein

The plurality of protrusions,

When the connector is rotated is separated from the projections facing each other is repeated to face the other projections, characterized in that the number of repetitions is less than four times, the stem for the bicycle can change the position of the handle bar.
The method of claim 4, wherein

A locking unit for keeping the first extension and the second extension connected to each other so as to prevent the second extension from rotating based on the first extension regardless of a user's intention. A bicycle stem that can change the position of the handle bar, further comprising.
The method of claim 6,

The locking unit,

A tightening shaft intersecting the first extension part and the second extension part along a central axis of the first extension part and the second extension part, an adjustment screw mounted to one end of the tightening axis, and a second end of the tightening axis; Consists of a direct clamping clamp that includes a tightening lever,

When the tightening lever is operated, a portion of the first extension portion and a portion of the second extension portion that are positioned between the tightening lever and the adjustment screw on the tightening shaft are brought into close contact with each other, thereby providing the first extension portion and the second extension portion. A bicycle stem that can be repositioned to handlebars, characterized by maintaining an interconnected state.
The method of claim 7, wherein

The direct tightening clamp,

In order to prevent release of the state in which the first extension part and the second extension part are interconnected as the tightening lever is operated irrespective of a user's intention, the tightening lever is prevented from being operated. And a hook for securing the first extension or the second extension to the handlebar.
The method of claim 6,

The locking unit,

A tightening shaft crossing the first extension part and the second extension part along a central axis of the first extension part and the second extension part, a first screw part mounted at one end of the tightening axis part, and the other end of the tightening axis part; Consists of a direct tightening biaxial screw comprising a second threaded portion,

When one of the first screw portion and the second screw portion is tightened, a portion of the first extension portion and a portion of the second extension portion that are located between the first screw portion and the second screw portion are in close contact with each other, thereby providing the first extension portion. And the second extension to keep the interconnection in position.
The method of claim 6,

The locking unit,

It consists of a wedge-shaped through screw penetrating across the side of the first extension and the side of the second extension to restrain the first extension and the second extension,

By contacting the side of the first extension portion and the side of the second extension portion through the through screw, the position of the handle bar, characterized in that the first extension portion and the second extension portion to maintain the interconnected state Bicycle stem.
The method of claim 6,

The locking unit,

Consists of a fastening screw connecting the first flange protruding to the side of the first extension and the second flange protruding to the side of the second extension,

By contacting the first flange and the second flange through the tightening screw, the first extension portion and the second extension portion to maintain the interconnected state, characterized in that for changing the position of the handle bar Stem.
The method of claim 6,

The locking unit,

A tightening shaft intersecting a third flange and a fourth flange protruding in a pair from one side of the first extension part and the second extension part which are not inserted at regular intervals, and mounted to one end of the tightening shaft Consists of an indirect tightening clamp including an adjustment screw that is, and a tightening lever mounted to the other end of the tightening shaft,

When the tightening lever is operated, the third flange and the fourth flange positioned between the tightening lever and the adjustment screw are brought into close contact with each other on the tightening shaft, thereby preventing insertion of the first and second extensions. Reducing any one of the outer peripheral surface, the first extension portion and the second extension portion to maintain the interconnected state, characterized in that the position of the handle bar can be changed.
The method of claim 6,

The locking unit,

A tightening shaft intersecting a third flange and a fourth flange protruding in a pair from one side of the first extension part and the second extension part which are not inserted at regular intervals, and mounted to one end of the tightening shaft Indirect fastening type biaxial screw comprising a first threaded portion and a second threaded portion attached to the other end of the tightening shaft,

When one of the first screw portion and the second screw portion is tightened, the third flange and the fourth flange positioned between the first screw portion and the second screw portion are brought into close contact with each other, so that the first extension portion and the second flange portion are in close contact with each other. A stem for a bicycle that can be repositioned, characterized in that for reducing the outer circumferential surface of any one of the extensions, the first and second extensions remain connected to each other.
The method according to claim 4 or 6,

In order to reduce frictional force generated between the first extension and the second extension when the second extension rotates with respect to the first extension according to the user's intention, the first extension and the first extension And a spring provided between an inner end of any one of the two extensions, which is not inserted, and an outer end of the other that is inserted opposite the inner end, wherein the handlebar can be repositioned. Stem.
The method of claim 6,

The locking unit,

A wire connected between one side connected to the first extension part and the other side connected to the second extension part in a loop shape, a wire having an outer circumferential surface of the second fastener disposed on an inner circumference of the loop, and an adjustment lever mounted to the other side of the wire Consists of a direct fastening unit comprising a,

When the control lever is operated, the loop between one side and the other side of the wire is shortened as the length of the wire decreases, so that the first extension part and the second extension part are kept connected to each other. Bicycle stem with repositionable handlebars.