KR101286225B1 - Multi-transformation folding bicycle - Google Patents

Abstract

The present invention relates to a multifunctional foldable bicycle, and more particularly, to a multifunctional foldable bicycle which includes a handlebar to which a handlebar to which a handlebar cover is coupled is mounted at one end and a front wheel is attached to the other end; A lower frame disposed obliquely at both ends of the rear wheel and the handle frame; And a saddle frame, one end of which is coupled to the lower frame so as to selectively rotate axially and the saddle is provided at the other end, and the lower frame is mounted at one end to the handle frame, A first lower frame on which the first lower frame is formed; A second lower frame mounted with a first length adjusting member or a second length adjusting member to which the first lower frame is inserted and slidably engaged with the length adjusting groove; And a third lower frame installed at one end of the second lower frame for axial rotation and having a rear wheel mounted at the other end of the bicycle, A sliding method in which the length of the lower frame is reduced or a method in which the distance between the front wheel and the rear wheel is reduced by rotating the rear wheel side frame.

Description

Multi-transformation folding bicycle

The present invention relates to a folding bicycle, in which the length and height are adjusted in accordance with the physical condition of the user, and the folding type is related to two or more multiformile folding bicycles.

In general, bicycles are a useful tool for locomotion as well as a role for fitness in modern life. However, in order to ride bicycles on modern roads, bicycles can be safely ridden on bicycle roads or go to parks.

To this end, folding bicycles are being produced to carry bicycles in cars. Such conventional folding bicycles are manufactured in various structures and systems including Korean Patent Registration No. 0854018, Korean Patent Laid-Open No. 2010-0077550, and Japanese Patent Laid-Open No. 2005-14895.

Hereinafter, these folding bicycles will be described in more detail.

1A and 1B, the portable bicycle disclosed in Korean Patent Registration No. 0854018 is a folding type in which a saddle and a rear wheel portion are moved toward a front wheel and a handlebar portion side. The handlebar folding device 10, A control device 11 is included. Here, the steering wheel folding device 10 collapses the handle, and the length of the bicycle is adjusted by the vehicle body length adjusting device 11.

However, as shown in FIG. 1B, a plurality of gears, idle gear pins, and the like are used as the handlebar folding device 10, and such a complicated structure has a problem in that the manufacturing complexity and the unit cost increase. In addition, the front and rear length of the bicycle was shortened.

As shown in Figs. 2A and 2B, the length-adjustable bicycle disclosed in Korean Patent Publication No. 2010-0077550 includes a handle bar 20, a first length member 22 disposed between the front and rear wheels, And a saddle frame 24 equipped with a saddle. Here, as shown in FIG. 2B, the length of the handle bar 20 is adjusted by the second operation lever 21, the length of the first length member 22 is adjusted by the first operation lever 23 , And the saddle frame (24) was adjusted in length by the third operation lever (25). Further, the handlebar 20 and the front wheel are folded together once more.

However, there was a disadvantage that the front and rear lengths were shortened so that the front wheel was axially rotated and the folded bicycle was inevitably moved by the user.

As shown in Figs. 3A and 3B, the bicycle structure capable of shortening the length of the body frame shown in Japanese Patent Application Laid-Open No. 2005-14895 includes a handle tube 30, a saddle tube 35 equipped with a saddle 35 at one end A lower tube 33 in which the saddle tube 34 is inserted, a lower tube 33 in which the saddle tube 34 is inserted, And a parent sleeve 32 connected to the saddle tube 33 and having one end thereof inserted into the saddle tube 34 side. 3B, the handle tube 30 is folded downward by the folding hinge 37 and the fingersubstrate 32 is moved to the end of the self-tube 31 on the side of the handle tube 30, (34) was completely inserted into the lower-end base tube (33), thereby being folded. As another example, the saddle tube 34 is detached from the lower base tube 33 and then inserted and fixed in the insertion tube 36 mounted on the lower base tube 33, whereby the saddle tube 34 is fixed in the longitudinal direction of the bicycle .

In order to fix the length adjustment of the handle tube 30, the self-tube 31, and the saddle tube 34, however, a number of locking members operated by a grip force are used. It was inconvenient.

The present invention has been made to solve the above-mentioned problems and disadvantages. It is an object of the present invention to provide a bicycle trunk which can be rolled by using a wheel while the volume of the bicycle is reduced by reducing the distance between the front wheel and the rear wheel, The purpose of the folding bicycle is to provide.

In addition, the present invention provides a multifunctional folding bicycle in which the length of the bicycle is reduced by the sliding method, and the distance between the front wheel and the rear wheel is reduced according to the convenience of the rotation of the frame on the rear wheel side, have.

According to an aspect of the present invention, there is provided a folding bicycle comprising: a handle frame having a handlebar to which a handlebar cover is coupled, the handlebar being mounted at one end and the front wheel being mounted at the other end; A lower frame disposed obliquely at both ends of the rear wheel and the handle frame; And a saddle frame, one end of which is coupled to the lower frame so as to selectively rotate axially and the saddle is provided at the other end, and the lower frame is mounted at one end to the handle frame, A first lower frame on which the first lower frame is formed; A second lower frame mounted with a first length adjusting member or a second length adjusting member to which the first lower frame is inserted and slidably engaged with the length adjusting groove; And a third lower frame installed at one end for axial rotation from the second lower frame and a rear wheel mounted at the other end.

Here, the first length adjusting member is divided into a small-diameter portion and a large-diameter portion, and a first stopping protrusion protruding inward from a boundary portion between the small-diameter portion and the large-diameter portion is formed, and a large diameter portion is seated on the second lower frame, A length-regulating body cut into the interior of the second lower frame; A length adjusting head portion inserted into the large diameter portion so as to be coupled with the length adjusting groove while being reciprocated by an elastic force in a direction perpendicular to the longitudinal direction of the second lower frame; A length adjusting bar having a length adjusting head coupled to the one end of the length adjusting head and a length adjusting knob attached to the other end of the length adjusting head, the length adjusting bar being spaced apart from the length adjusting knob by a predetermined distance; And a length adjusting elastic body mounted between the flange and the first stopping jaw.

The second length adjusting member may include a plurality of lever coupling grooves formed at predetermined intervals in the first or second extension of the first lower frame; A pair of lever engaging protrusions protruded to face each other on the upper surface of the second lower frame; A lever having a curved surface portion interposed between the lever engaging projections to be seated to move in a seesaw motion, a bent portion bent through one end of the curved surface portion and passing through the through hole formed in the second lower frame to selectively fit into the lever engaging groove; And a lever elastic body disposed and fixed between the curved surface portion and the second lower frame so that the seesaw motion of the lever is restored to the original position.

The first lower frame includes a first body having a length inserted into the second lower frame while one end is coupled to the handle frame; Further comprising a first extension extending from the outer circumferential surface of the first body toward the first length adjustment member and extending in the longitudinal direction and having a plurality of length adjusting grooves formed in the longitudinal direction thereof, A first insertion hole formed so as to insert a first body formed with an extension part and communicating with the large diameter part; A saddle frame engaging part formed at one end of the saddle frame so as to be rotatable about an axis thereof; A second shock absorber coupling part installed to rotate axially with the other end of the second shock absorber installed at one end of the saddle frame; And a first shaft coupling protrusion formed on the lower surface of the third lower frame so as to be axially coupled with the third lower frame, A second shaft coupling protrusion formed on the first shaft; And a pedal shaft through hole formed such that the other end of the pedal shaft is pierced by the pedal engagement part and the pedal is installed at one end thereof to mount the power transmission device.

The first lower frame includes a second body having a length inserted into the second lower frame while one end of the second body is coupled to the handle frame; And a second extension portion spaced apart from the second body and formed to have a length inserted into the second lower frame while being coupled to the handle frame at one end thereof and having a plurality of length adjusting grooves formed in a longitudinal direction thereof on one side thereof, 2 the lower frame comprises: a second insertion hole formed to insert a second body of the first lower frame; An extension portion insertion hole into which the second extension portion of the first lower frame is inserted and which communicates with the large-diameter portion of the first length adjustment member; A saddle frame engaging part formed at one end of the saddle frame so as to be rotatable about an axis thereof; A second shock absorber coupling part installed to rotate axially with the other end of the second shock absorber installed at one end of the saddle frame; And a first shaft coupling protrusion formed on the lower surface of the third lower frame so as to be axially coupled with the third lower frame, A second shaft coupling protrusion formed on the first shaft; And a pedal shaft through hole formed such that the other end of the pedal shaft is attached to the power transmission unit through a pedal shaft having the pedal mounted at one end thereof by the pedal engagement portion.

The second lower frame may include a first insertion hole formed to receive a first body and a first extension or a second extension of the first lower frame, the first insertion hole being formed to allow a large diameter portion of the first length adjustment member to pass therethrough; A saddle frame engaging part formed at one end of the saddle frame so as to be rotatable about an axis thereof; A second shock absorber coupling part installed to rotate axially with the other end of the second shock absorber installed at one end of the saddle frame; And a mounting hole formed at a lower end of the third lower frame, wherein the third lower frame is mounted on the power transmitting device through the other end of the pedal shaft having the pedal mounted at one end thereof by the pedal connecting portion A pedal shaft through-hole formed so as to be capable of rotating; And a mounting hole formed to be axially coupled to the mounting hole through a mounting member.

The first and second extension portions of the first lower frame further include a release preventing member protruding at a predetermined height from the second lower frame side end portion.

The rotation angle restricting means may further include rotation angle restricting means for restricting a rotation angle of the second lower frame and the third lower frame to rotate with respect to each other, A first protrusion formed of a pair of protrusions protruding downward from the first lower frame to the third lower frame and having a first protrusion protruding from each other; A second protrusion formed of a pair of protrusions protruding downward toward the third lower frame side in the longitudinal direction central portion of the second lower frame and having a second locking protrusion so as to face each other; A first latching groove formed on both sides of one side end of the third lower frame to be engaged with the first latching protrusion of the first projection; And a second engaging groove formed on both sides of one side end of the third lower frame to engage with the second engaging projection of the second projection.

Further, it is preferable that the rotation angle restricting means further comprises a rotation angle restricting means for restricting the rotation angle of the second lower frame and the third lower frame to each other, A third protrusion formed of a pair of protruding portions protruding upward toward the frame side and having third locking protrusions formed to face each other; A fourth protrusion formed of a pair of protrusions protruding in the longitudinal direction at a lower portion of one end of the third lower frame on the side of the second lower frame and having a fourth engaging protrusion so as to face each other; A third latching groove formed on both sides of one side end of the second lower frame to engage with the third latching projection of the third projection; And a fourth engaging groove formed on both lower sides of the second lower frame to engage with the fourth engaging projection of the fourth projection.

The rotation angle restricting means may further include rotation angle restricting means for restricting a rotation angle of the second lower frame and the third lower frame to each other, A plurality of angle adjusting holes formed on one side of the first lower frame to protrude from the first lower frame and to be coupled with the length adjusting head portion along the axial curvature of the third lower frame on one side, An angle adjusting member including an angle adjusting slot formed so as to penetrate the length adjusting bar along the guide groove; A pair of insertion holes formed at one end of the third lower frame side of the third lower frame so that the pair of angle adjusting members are respectively inserted; And a third length adjusting member having a length adjusting head disposed to be selectively coupled to the angle adjusting hole so that the length adjusting bar passes through the angle adjusting slot. The third length adjusting member is divided into a small diameter portion and a large diameter portion A length adjusting body having a first stopping protrusion protruding inwardly from a boundary between a small diameter portion and a large diameter portion and having a top portion cut so that the length adjusting head portion located at the large diameter portion is fastened to the angle adjusting hole; A length adjusting bar having a length adjusting head coupled to the one end of the length adjusting head and a length adjusting knob attached to the other end of the length adjusting head, the length adjusting bar being spaced apart from the length adjusting knob by a predetermined distance; And a length adjusting elastic body mounted between the flange and the first stopping jaw.

On the other hand, the saddle frame includes: a first saddle frame fastened to the second lower frame such that one end of the saddle frame is axially rotated, and one end of the second cushioning device is detachably fastened to an intermediate portion; And a second saddle frame slidably inserted into the upper part of the first saddle frame through the saddle clamping part and having a saddle mounted at an upper end thereof.

The saddle is narrower in width than the rear portion of the hind paw, and the front portion and the rear portion are formed into a forward split hole and a rear split hole, respectively, and divided into two.

Here, the handle frame may include: a first handle frame, one end of the first lower frame coupled to a portion of the first handle frame, and a front wheel disposed below the first handle frame; A second handle frame inserted into the first handle frame and connected to the front wheel, the second handle frame installed to rotate axially to the lower frame side through the first handle clamping unit; And a third handle frame installed to be slidable with respect to the second handle frame through the second handle clamping part and having a handlebar mounted at one end thereof.

The handle bar may further include: a first handlebar mounted on the handle frame; A pair of guide slots which are respectively fastened to both end portions of the first handle bar and which are formed on opposite ends of the fastening portion so as to be mutually opposed to each other in the longitudinal direction, A second handle bar including a member and a second handlebar engagement hole formed at an end of the guide slot side; A pair of handle bar elastic members inserted into the second handle bars, respectively; A grip portion formed at both side ends of the sliding body so as to slide outwardly so as to be protruded outwardly from the guide slot; A pair of sliding members including a first handlebar groove formed in a shape of which one side is longer than the other side; And a first handlebar engaging hole formed in a part of the second handlebar engaging with the second handlebar engaging hole so as to urge the sliding member, and a second handlebar engaging hole formed at one side of the engaging member to engage with the engaging member when the shaft barrel is folded or unfolded A handle cover which is engaged with the first handle bar groove and which is formed in a shape corresponding to the first handle bar groove at the end portion of the third handle bar so as to be aligned with the first handle bar groove; And a pair of third handle bars including two handle bar grooves.

The side surfaces of the first and second handlebar grooves are long in the first and second folding preventing surfaces to prevent rotation and folding of the third handle bar when the first and second handlebar grooves are aligned with each other.

The pedal engagement portion includes a fixing protrusion formed integrally with the coupling body insertion hole formed at one end of the pedal shaft and fixed to the outer peripheral surface of the pedal shaft opposite the end portion on the opposite side of the pedal shaft, A fastening body including a base; A shaft rotating head portion having a fastening body fitted and fastened to the shaft and having a second step locking protrusion formed so as to be engaged with the first step locking protrusion so as to limit the shaft rotation opening angle, And the shaft rotating head is formed with a fastening body groove in which the fastening body is inserted, and a bottom surface of the fastening body groove is fastened to the fastening body when the shaft rotating head is rotated about its axis Interference with the end of the body on the side of the shaft rotating head is prevented and the curved surface is formed so as to interfere with the fixing protrusion when the shaft rotation is completed.

A branch bar mounted at one end to the third lower frame and branched at the other end to the rear wheel side; And a pair of auxiliary wheels installed to allow the bicycle to stand when the third lower frame is vertically rotated on the branch bar.

As described above, according to the present invention, even if the bicycle is folded to reduce the volume, the bicycle can be moved by using the wheels.

In addition, there is an effect that the bicycle can be folded according to convenience, such as a method in which the length of the bicycle is reduced by a sliding method and a method in which the distance between the front wheel and the rear wheel is reduced by rotating the rear wheel side frame.

In addition, since the rear wheel side frame is axially rotated, the distance between the front wheel and the rear wheel can be selectively reduced, so that the length of the bicycle can be adjusted without adjusting the distance between the handle and the saddle, .

Further, since the pedal frame, the handle frame, and the saddle frame are folded, the volume of the bicycle in the folded state can be further reduced, which is convenient for transportation and storage.

Further, according to the user's body shape, the distance between the saddle and the handle is reduced to a sliding manner, thereby providing an optimum driving mode.

In addition, since the lower frame is disposed so as to be inclined downward to the left, there is an effect that when the frame is reduced by the sliding method, the saddle increases.

In addition, the rear wheel is equipped with a secondary wheel, even when the bike is folded, you can raise the bike.

In addition, since the folded state is maintained when the bicycle is folded, a separate fixing device is not necessary, and convenience is improved.

In addition, it can be separated into a handlebar, a front wheel, a saddle and a rear wheel, so that it is convenient to store and move.

1A and 1B are a side view and a perspective view showing an example of a conventional folding bicycle.
2A and 2B are side views showing another example of a conventional folding bicycle.
3A and 3B are perspective views showing still another example of a conventional folding bicycle.
4 is a side view schematically illustrating a multi-modified folding bicycle according to a preferred embodiment of the present invention.
5 is a perspective view showing the separated first, second, and third lower frames shown in FIG.
Fig. 6 is a side view showing the separated state of the first length adjusting member shown in Fig. 5;
7 is a perspective view showing a separated state of the second length adjusting member which is another embodiment of the first length adjusting member shown in FIG.
8 is a plan view of the saddle shown in Fig.
Figs. 9A and 9B are a perspective view showing the separated state of the handle frame shown in Fig. 5 and a perspective view showing the combined state.
FIG. 10 is a perspective view showing a separated state of a pedal engagement portion provided on the pedal shaft shown in FIG. 4. FIG.
11 is an exploded perspective view illustrating another embodiment of the first, second, and third lower frames shown in FIG.
12A is an exploded perspective view illustrating still another embodiment of the first, second, and third lower frames shown in FIG.
12B is a side cross-sectional view showing the third length adjusting member shown in Fig.
Figs. 13A and 13B are side views showing the first method of folding the bicycle shown in Fig. 4; Fig.
Figs. 14A and 14B are side views showing a second manner of folding the bicycle shown in Fig. 4. Fig.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a multivariable folding bicycle according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

<Configuration>

FIG. 4 is a side view schematically showing a multifarious foldable bicycle according to a preferred embodiment of the present invention, FIG. 5 is a perspective view showing a separated state of the first, second and third lower frames shown in FIG. 6 is a side view showing a separated state of the first length adjusting member shown in Fig. 5, Fig. 7 is a side view showing a state where the separated state of the second length adjusting member, which is another embodiment of the first length adjusting member shown in Fig. 6, Fig. 8 is a plan view of the saddle shown in Fig. 4, Figs. 9A and 9B are a perspective view showing the separated state of the handle frame shown in Fig. 5 and a perspective view showing the combined state, 10 is a perspective view showing a separated state of the pedal engagement portion provided on the pedal shaft shown in FIG.

4, the front wheel 110, the rear wheel 120, the front wheel 110, and the first shock absorber 130 are mounted on the lower end of the handle bar (not shown) A handle frame 500 attached to an upper end of the lower frame 200 and a lower frame 200 connected to the rear wheel 120 and the handle frame 500 to adjust the lengths of the lower frame 200 and the lower frame 200 equipped with the power transmission devices 150, A saddle frame 400 having a saddle 430 fastened to the other end of the saddle frame 400 while being rotatably mounted at one end of the saddle frame 400 on the lower frame 200, And a pedal shaft 600 to which the pedal 620 is mounted by the pedal engagement portion 610 while the transmission devices 150 and 160 are installed. Here, the power transmission apparatuses 150 and 160 may be applied not only to the chain system but also to various systems.

5, the lower frame 200 includes first, second, and third lower frames 210, 220, and 230.

The first lower frame 210 includes a first body 211, a first extending portion 212, and a separation preventing member 213. Also, the length of the first lower frame 210 is made long enough to allow one end to protrude outward when the second lower frame 220 is fully inserted into the second lower frame 220.

The first body 211 has a length such that one end of the first body 211 is connected to the handle frame 500, specifically, the first handle frame 510 to be described later, and inserted into the second lower frame 220 to protrude to the opposite side. In addition, the first body 211 is preferably formed in the shape of a cylinder of hollow metal or nonmetal, but it may be any shape other than a cylinder.

The first extension portion 212 is formed integrally with the upper surface of the first body 211 so as to protrude upward. On the upper surface of the first extended portion 212, a plurality of length adjusting grooves 212a are formed in the longitudinal direction. Of course, the length of the first extension 212 is the same as the length of the first body 211. Also, the first extension 212 may be separately manufactured and welded to the first body 211. The length adjusting groove 212a may be formed directly on the outer surface of the first body 211 in a state where the first extending portion 212 is removed.

The release preventing member 213 is a member that prevents the first body 211, that is, the first lower frame 210 from being separated from the second lower frame 220 while being inserted. To prevent this, the release preventing member 213 is formed to have a degree of engagement with the length adjusting head portion 320 of the first length adjusting member 300, which will be described later, in order to prevent the first lower frame 210 from being moved in the reverse direction, Respectively. Further, the release preventing member 213 is fastened to the opposite end of the first handle frame 510 at the first extending portion 212. At this time, it is preferable that the release preventing member 213 is detachably mounted and a screw fastening method is used. In addition, the release preventing member 213 may be installed in a structure in which the first lower frame 210 is upwardly and downwardly resiliently moved so as to be protruded when the second lower frame 210 is inserted into the second lower frame 220, Or may be installed in a structure in which rotation of the shaft is prevented.

The second lower frame 220 includes a first insertion hole 221, a saddle frame coupling portion 222, a second shock absorber coupling portion 223, a first shaft coupling projection 224, a first projection 225 And a second projecting portion 226, as shown in Fig.

The first insertion hole 221 is longitudinally formed in the second lower frame 220 so that the first body 211 integrally formed with the first extended portion 212 is inserted.

The saddle frame engaging portion 222 is a member that is coupled to the saddle frame 400, specifically, the lower end of the first saddle frame 410, which will be described later, As shown in Fig.

The second shock absorber coupling portion 223 is a member coupled to the lower end of the second shock absorber 140 so as to rotate axially and is coupled to the upper surface of the third lower frame 230 side end portion of the second lower frame 220 in a pair Upwardly protruding.

The first shaft coupling protrusion 224 is coupled with the second shaft coupling protrusion 231 mounted on the third lower frame 230 so that the third lower frame 230 can be rotated from the second lower frame 220 And is formed to protrude downward on the lower surface of the second lower frame 220.

The first protrusions 225 are formed as a pair extending downward from the third lower frame 230 side end of the second lower frame 220. When the second lower frame 220 and the third lower frame 230 are horizontal, the first protrusions 225 (not shown) are coupled to the first locking grooves 232 formed in the third lower frame 230 to assist the horizontal movement, Are provided with a first locking protrusion 225a, respectively.

The second protrusions 226 are formed as a pair extending downward from the longitudinal center of the second lower frame 220. When the third lower frame 230 is rotated about the second lower frame 220 to be perpendicular to the second lower frame 220, And second protrusions 226a are formed on opposite inner surfaces of the two protrusions 226, respectively. Here, the second latching protrusion 226a is indicated by a dotted line in the drawing, indicating that it is formed on the inner surface. The first and second locking grooves 232 and 233 and the first and second locking projections 225a and 226a may be disposed to correspond to each other.

The third lower frame 230 includes a second shaft coupling protrusion 231, a first locking groove 232, a second locking groove 233, and a pedal shaft through hole 234.

The second shaft coupling protrusion 231 is a member which is engaged with the first shaft coupling protrusion 224 of the second lower frame so that the third lower frame 230 is axially rotated with respect to the second lower frame 220, And protrudes from one end of the lower frame 230.

The first latching groove 232 is a member coupled with the first latching protrusion 225a to assist the parallel state of the second lower frame 220 and the third lower frame 230, ) On one side of the upper end.

The second locking groove 233 is formed in the second locking protrusion 226a formed on the second lower frame 220 to assist the third lower frame 230 in a vertical position with respect to the second lower frame 220 And is formed on the lower both sides of the end of the third lower frame 230 on the side of the second lower frame 220 side.

The pedal shaft through hole 234 is formed to penetrate the pedal shaft 600 so that the power transmission devices 150 and 160 connected to the pedal shaft 600 can be mounted.

The first shaft coupling protrusion 224, the first projection 225 and the second projection 226 formed on the second lower frame 220 and the second shaft coupling protrusion 224 formed on the third lower frame 230 The first engaging groove 231, the first engaging groove 232, and the second engaging groove 233 are examples of the rotation angle restricting means. The rotation angle restricting means is a means for restricting the rotation angle of the axes of the third lower frames 230, 230 ', 230' 'with respect to the second lower frames 220, 220', 220 " As in Figs. 11 and 12A, and of course, two members can of course be replaced in various ways to limit the shaft rotation angle to shaft rotation.

6, the first length adjusting member 300 includes a length adjusting body 310, a length adjusting head 320, a length adjusting bar 330, a length adjusting elastic body 340, . The dotted line shows a state in which the length adjusting head 320 and the flange 360 are moved as the length adjusting bar 330 moves.

The length adjusting body 310 has a large diameter portion 311 in which the length adjusting head 320 is inserted and reciprocated and a small diameter portion 312 in which the length adjusting bar 330 is inserted and reciprocated. A first stopping protrusion 311a protruding inward from a boundary between the large-diameter portion 311 and the small-diameter portion 312 is formed so that the length-adjusting elastic body 340 contacts the small-diameter portion 312. The large-diameter portion 311 is seated on the second lower frame 220 and partially buried. At this time, the buried portion of the large diameter portion 311 is formed so as to be selectively engaged with the length adjusting groove 212a of the second lower frame 220 by the second length adjusting head portion 320 built in the large diameter portion 311, And is formed so as to communicate with the first insertion hole 221 of the lower frame 220.

The length adjusting head 320 is inserted into the large diameter portion 311 and is fastened to the length adjusting bar 330 to be moved in accordance with reciprocating movement of the length adjusting bar 330. The length adjusting head portion 320 is located inside the large diameter portion 311 at the fastening position with the length adjusting groove 212a and protrudes outside the large diameter portion 311 at the releasing position with respect to the length adjusting groove 212a .

The length adjusting bar 330 has a length adjusting head 320 at one end and a length adjusting knob 350 at the other end of the length adjusting bar 330. The length adjusting knob 350 is spaced apart from the length adjusting knob 350 by a predetermined distance, .

The length adjusting elastic body 340 is interposed between the flange 360 and the first stopping step 311a so that the length adjusting head 320 can be adjusted in length to be fastened to the length adjusting groove 212a in the large diameter portion 311 Thereby providing an elastic force for returning the head portion 320 to the fastening position. The length adjusting elastic member 340 protrudes outside the large diameter portion 311 when the length adjusting knob 350 is pressed and compressed by an external force and the length adjusting knob 350 protrudes outside the large diameter adjusting portion 350. [ The length adjusting head 320 is positioned inside the large diameter portion 311 to provide an elastic force to return to the fastening position. The length adjusting knob 350 and the flange 360 may be formed to be detachable from the length adjusting bar 330 or may be integrally formed. When the length adjusting knob 350 and the flange 360 are integrally formed, (320) may be formed by screwing them together.

7, the second length adjusting member 300 ', which is another embodiment of the first length adjusting member 300, includes a lever engaging groove 310', a lever engaging projection 320 ', a lever 330 ', And a lever elastic body 340'. Needless to say, the second length adjusting member 300 'can be substituted for the first length adjusting member 300 in other embodiments of the lower frame 200 in FIGS. 11 and 12A.

The lever engagement grooves 310 'are formed in the first extension part 212 of the first lower frame 210 in a longitudinal direction at regular intervals.

The lever engaging protrusions 320 'are formed as a pair protruding from the upper surface of the second lower frame 220 so as to face each other.

The lever 330 'is interposed between the lever engaging projections 320' and is axially coupled to seesaw motion. The lever 330 'includes a curved surface portion 331' interposed between the lever engaging projections 320 'for seesaw movement and a curved portion 331' bent at one end of the curved surface portion 331 ' And a bent portion 332 'that selectively passes through the through hole 321' formed in the lever coupling groove 310 'and the through hole 321' formed in the lever coupling groove 310 '.

The lever elastic body 340 'is disposed and fixed between the curved surface portion 331' and the second lower frame 220 to restore the seesaw motion of the lever 330 'to the original position.

4, the saddle frame 400 includes a first saddle frame 410 and a second saddle frame 420.

The lower end of the first saddle frame 410 is coupled to the saddle frame engaging portion 222 of the second lower frame 220 so as to rotate in an axial direction and one end of the second shock absorber 140 is detachably coupled. The first saddle frame 410 and the second cushioning device 140 are fastened to each other by a hook fixing member 411 formed on the first saddle frame 410 and a hooking bar 411 formed on the second cushioning device 140. [ (Not shown). At this time, the engagement of the hook fixing member 411 with the hook catching bar is performed by hooking the hooking catch to the hook fixing member 411 by the hook lever 412.

The second saddle frame 420 is slidably mounted on the upper part of the first saddle frame 410 and the saddle 430 is mounted on the upper end. 8, the saddle 430 has a shape in which the width of the hindlimb-side rear portion 433 of the user is wider than the width of the thigh-side front portion 431 of the user. The front portion 431 is formed with a front split hole 431a having an open top and a bottom at the center portion 432 side and the rear portion 433 is also divided into a rear split hole 431, (433a) is formed and divided into two portions. The second saddle frame 420 is mounted to be inserted into the upper part of the first saddle frame 410 through the saddle clamping part 440. The saddle clamping unit 440 is a member used in a conventional folding bicycle. When the lever is turned, the second saddle frame 420 is unfastened and the second saddle frame 420 can be slid.

The handle frame 500 includes a first handle frame 510, a second handle frame 520, and a third handle frame 530, as shown in FIG.

The first handle frame 510 includes a front wheel 110 and a first shock absorber 130 at a lower end thereof and an end portion of the first body 211 at an intermediate portion thereof.

The second handle frame 520 is inserted into the first handle frame 510 and connected to the front wheel 110. The second handle frame 520 is coupled to the rear wheel 120 through the first handle clamping unit 540 at the lower end, And the third handle frame 530 is slidably inserted into the upper portion. The first handle clamping unit 540 is a member used in a conventional folding bike. The first handle clamping unit 540 is a member used in a conventional folding bicycle. The first handle clamping unit 540 includes a second handle frame 520 inserted into the first handle frame 510, ) Are released, and they are bent so as to rotate with respect to each other.

The third handle frame 530 is mounted such that the handlebar 700 is mounted on the upper end and the lower portion is inserted into the upper portion of the second handle frame 520 through the second handle clamping portion 550. The second handle clamping part 550 is a member used in a conventional folding bicycle. When the lever is turned, the third handle frame 530 is released and the third handle frame 530 can be slid.

9A and 9B, the handle bar 700 includes a first handle bar 710, a second handle bar 720, a handle bar elastic body 740, a sliding member 750, 3 handle bar 730 are included. Here, the handle bars 700 are disposed on both sides of the handle frame 500, respectively. The handle bar 700 will be described with reference to only one side for convenience.

The first handle bar 710 is horizontally fixed to the upper end of the third handle frame 530. At this time, the central portion of the first handle bar 710 is fixed to the third handle frame 530.

One end of the first handle bar 710 is inserted and fastened to the second handle bar 720. In this case, the second handle bar 720 may be integrally formed with the first handle bar 710. The second handle bar 720 is provided with a pair of guide slots 721 formed in the longitudinal direction while being opposed to each other at the opposite end of the first handlebar 710, A second handlebar engaging hole 722 formed to pivotally engage the guide slot 730 and an engaging member 723 mounted vertically through the horizontal guide slot 721.

The handle bar elastic body 740 is inserted at the end of the guide slot 721 side and embedded in the second handle bar 720. At this time, the side surface of one end of the first handle bar 710 inserted into the second handle bar 720 serves as a support surface for elastic compression of the handle bar elastic body 740.

The sliding member 750 has a substantially arrowhead shape including a sliding body 751 and a handle portion 752.

The sliding body 751 is substantially cylindrical in shape to be inserted into the hollow second handle bar 720 so as to be inserted into the second handle bar 720 at the end of the guide slot 721 side.

The grip portion 752 is formed to protrude from both side ends of the sliding body 751 so as to be slid outwardly in the guiding slot 721. The grip portion 752 is formed integrally with the sliding body 751 or separately manufactured and fastened. A first handle bar groove 753 having a substantially "J" shape is formed at the pointed end of the handle portion 752 on the side of the third handlebar 730 side, that is, the tip of the arrowhead. And the long side is the first folding preventing surface 753a.

A handle cover 731 is coupled to one end of the third handle bar 730. The third handle bar 730 includes a first handlebar engaging hole 732 formed at the opposite end of the handle cover 731 and inserted into the guide slot 721 at a second end thereof to be rotatably engaged with the second handlebar engaging hole 722, Shaped second handlebar groove 733 formed so as to correspond to the first handlebar groove 753 of the handle 752 and a release engagement groove 734 formed on one side of the handle 752 side, And a folding engagement groove 735 are formed.

The long side of the second handlebar groove 733 is a second folding prevention surface 733a that is in surface contact with the first folding prevention surface 753a of the first handlebar groove 753. [

The opened engaging groove 734 and the folding engaging groove 735 engage with the second handle bar 720 in the axial rotation direction of the third handle bar 730 which rotates about the first and second handlebar engaging holes 732, And is disposed so as to engage with the engaging member 723 of the second handle bar 720 to restrict the angle.

10, an upper end portion of the pedal shaft 600 is mounted to the power transmission devices 150 and 160, and a pedal 620 is coupled to the lower end portion of the pedal shaft 600 through the pedal engagement portion 610. [ A coupling body insertion hole 601 is formed at the lower end of the pedal shaft 600 and a fitting projection 602 protruding inward from the coupling body insertion hole 601 is formed.

The pedal engagement portion 610 includes a fastening body 611 and a pedal rotation shaft 612.

An end of the fastening body 611 having a diameter smaller than that of the other portion to be inserted into the pedal shaft 600 is formed with a fitting groove 611a on the upper surface thereof to be fitted with the fitting projection 602 of the fastening body insertion hole 601 . A first stepped protrusion 611b is formed at the other end of the fastening body 611 that is not inserted into the pedal shaft 600 and a fixing protrusion 611c is formed at the upper end of the end of the pedal shaft 600 opposite to the pedal shaft 600 .

The pedal rotation shaft 612 includes an axis rotation head portion 612a and an axis rotation bar 612c.

The shaft rotating head portion 612a is formed with a fastening body groove 612d so that one end of the fastening body 611 is inserted and axially rotated. The bottom surface 612e of the fastening body groove 612d which is close to the longitudinal end face of the fastening body 611 in a state where the fastening body 611 is inserted is rotated about the fastening body 611 with respect to the fastening body 611 And is curved so as to interfere with the fixing protrusion 611c when folded. The shaft rotating head portion 612a is engaged with the shaft rotating head portion 612a with respect to the rotating body 611 so that the shaft rotating head portion 612a is engaged with the first step locking protrusion 611b The second step blocking protrusion 612b is formed. Here, the shaft rotating head portion 612a is fastened by a fastening body 611, a bolt and a connecting nut so as to rotate in an axial direction.

The shaft rotating bar 612c extends from the shaft rotating head portion 612a and is engaged with the pedal 620 so as to be rotatable while passing through the pedal 620. [

14A and 14B, the folding bicycle 100 further includes a pair of auxiliary wheels 900 on the rear wheel 120 side.

The auxiliary wheel 900 is coupled to the third lower frame 230 at one end thereof and is connected to a rear wheel 910 supported at the other end by a support bar 920 mounted on the rear wheel 120 To the branch bar 930 extended to the left. At this time, when the third lower frame 230 rotates and the rear wheel 120 is folded, the auxiliary wheel 900 is brought into contact with the ground along with the rear wheel 120 so that the bicycle 100 is installed do. Further, a rear reflector 940 for safety is provided on a part of the branch bar 930. [

<First Modification>

11 is an exploded perspective view illustrating another embodiment of the first, second, and third lower frames shown in FIG. Here, in order to explain the first, second, and third subframes of the other embodiments in FIG. 11, other elements are given the same reference numerals to facilitate understanding. In addition, based on the first, second, and third lower frame of Fig. 5, the first modification of the first, second, and third subframes of Fig. 11 will be described with a focus on differences, The description of the configuration is omitted or reduced.

The first lower frame 210 'includes a second body 211', a second extended portion 212 ', and a separation preventing member 213. In addition, the first lower frame 210 'has a length such that one end inserted into the second lower frame 220' can protrude outward. Here, the release preventing member 213 is the same as the release preventing member 213 of FIG. 5, and a description thereof will be omitted.

The second body 211 'has a substantially hollow cylindrical shape and is disposed such that one end thereof is coupled to the first handle frame 510 and inserted into the second lower frame 220'.

Unlike the embodiment of FIG. 5, the second extended portion 212 'is formed separately from the second body 211', and the first extended portion 212 'is coupled to the first handle frame 510 at one end thereof to form the first lower frame 220' As shown in Fig. Here, the length of the second extension part 212 'is preferably the same as that of the first lower frame 210'. Of course, it is a matter of course that a length adjusting groove 212a is formed on the upper surface of the second extending portion 212 'so as to be engaged with the first length adjusting member 300.

The second lower frame 220 'includes a second insertion hole 221', an extension portion insertion hole 221 '', a saddle frame coupling portion 222, a second buffer coupling portion 223, An axial engaging projection 224, a third engaging groove 225 ', and a fourth engaging groove 226'. Here, the saddle frame engaging portion 222, the second shock absorber engaging portion 223, and the first shaft engaging protrusion 224 are the same as those in the embodiment of FIG.

The second insertion hole 221 'is longitudinally formed in the second lower frame 220' to insert the second body 211 '.

The extension portion insertion hole 221 '' is formed in the second lower frame 220 'separately from the second insertion hole 221' so that the second extension portion 212 'provided separately from the second body 211' Are formed in the longitudinal direction.

When the second lower frame 220 'and the third lower frame 230' are horizontal, the third hooking groove 225 'is formed in the third lower frame 230' 3 side of the end of the second lower frame 220 'on the side of the third lower frame 230' to be engaged with the third locking protrusion 232a '.

When the third lower frame 230 'is rotated about the second lower frame 220' with respect to the second lower frame 220 ', the fourth hooking groove 226' is formed in the third lower frame 230 ' Is formed on both lower sides of the lower end of the third lower frame 230 'side end portion of the second lower frame 220' to be engaged with the fourth locking projection 233a 'to be described later.

The third lower frame 230 'includes a second shaft coupling protrusion 231, a third protrusion 232', a fourth protrusion 233 ', and a pedal shaft through hole 234 . Here, the second shaft coupling protrusion 231 and the pedal shaft through-hole 234 are the same as those in the embodiment of FIG. 2, and a description thereof will be omitted. The second shaft coupling protrusion 231 has a slightly different size from that of FIG. 5, but the functions thereof are the same. Of course, the distance between the pair of first shaft coupling protrusions 224 may be adjusted to match the size of the second shaft coupling protrusion 231, or the width of the second lower frame 220 'may be adjusted.

The third projection 232 'is formed as a pair extending upward from the end of the third lower frame 230' on the side of the second lower frame 220 '. When the second lower frame 220 'and the third lower frame 230' are leveled, the second lower frame 220 'and the third lower frame 230' The third protrusions 232a 'are formed on the opposite inner surfaces of the protrusions 232'.

The fourth protrusion 233 'is formed as a pair protruding in the longitudinal direction from the end of the third lower frame 230' on the side of the second lower frame 220 '. When the third lower frame 230 'is perpendicular to the second lower frame 220' with respect to the second lower frame 220 ', a fourth engagement groove 226' formed in the second lower frame 220 ' The fourth protrusion 233a 'is formed on each of the opposite inner surfaces of the fourth protrusion 233' so as to be coupled with the fourth protrusion 233 '. Here, the fourth engaging protrusion 233a 'is indicated by a dotted line in the figure and is formed on the inner surface. The third and fourth latching grooves 225 'and 226' and the third and fourth latching protrusions 232a 'and 233a' may be disposed so as to correspond to each other.

Here, the third hooking groove 225 'and the fourth hooking groove 226' of the second lower frame 220 ', the third projecting portion 232' of the third lower frame 230 ' The second protrusion 232a ', the fourth protrusion 233', and the fourth locking protrusion 233a 'are examples of the rotation angle restricting means. This rotation angle restricting means is a modification of the embodiment of FIG. 5 as means for restricting the rotation angle of the axes of the third lower frames 230, 230 ', 230''with respect to the second lower frames 220, 220', 220 " , Typically two members can be substituted in various ways to limit the shaft rotation angle to shaft rotation.

&Lt; Second Modified Example &

12A is an exploded perspective view showing another embodiment of the first, second and third lower frames shown in FIG. 5, and FIG. 12B is a side sectional view showing the third length adjusting member shown in FIG. 12A. Herein, in describing the second and third subframes, which are still another embodiment, other elements that are not modified will be given the same reference numerals for easy understanding.

As shown in FIGS. 12A and 12B, the third lower frame 230 '' is rotatably supported by the second and third lower frames 220 '' and 230 '', The angle adjusting member 800 and the third length adjusting member 300 '' as the first and second lower frames 220 '' and 230 '', respectively, are installed. Of course, the first lower frame 210 and the second lower frame 220 &quot; are fastened to be inserted and slid by the length adjusting members 300 and 300 'in the same manner as in the embodiment of Figs. 6 and 7 .

In the second lower frame 220 '', a pair of angle adjusting members 800, which are approximately semicircular in shape, are protrudingly formed on the lower surface of the end portion of the second lower frame 220 '' on the side of the third lower frame 230 ' .

The angle adjusting member 800 includes a mounting hole 810 formed to rotate with the third lower frame 230 '', an angle adjusting hole 820 formed to have an approximately dumbbell shape along the curvature of the rim, And an angle adjusting slot 830 formed to have a constant width along the curvature. The angle adjusting hole 820 and the angle adjusting slot 830 are formed on one side and the other side of the angle adjusting member 800, respectively. Although the angle adjusting hole 820 and the angle adjusting slot 830 are formed in accordance with the axial rotational curvatures of the second lower frame 220 '' and the third lower frame 230 '', The shape may be other than a semicircular shape.

A mounting hole 810 formed in the angle adjusting member 800 and a mounting member 851 formed in the third lower frame 230 ' And a third length adjusting member 300 &quot;. Here, the third length adjusting member 300 '' is similar to the first length adjusting member 300 shown in FIG. 6, and only when the length adjusting head 320 reciprocates, the angle adjusting hole 820 is selectively And the length adjusting bar 330 is installed so as to pass through the angle adjusting slot 830. In addition, the third length adjusting member 300 '' is formed such that the incision portion of the large-diameter portion 311 in the length adjusting body 310 'is inserted into the incision opening hole 820 so that the length- There is a difference in shape. The incision shape is formed such that the entire or a part of the outer circumferential surface of the length adjustment head 320 is inserted into the angle adjustment hole 820.

<First way to fold a bicycle>

Figs. 13A and 13B are side views showing the first method of folding the bicycle shown in Fig. 4; Fig.

The first method of folding the folding bicycle 100 according to the present invention is a method of folding the folding bicycle 100 according to the first embodiment of the present invention, The first lower frame 210 is inserted into the second lower frame 220 as deeply as possible and the length adjusting bar 330 is moved so that the length adjusting head 320 and the length adjusting grooves 212a ) Is engaged.

Next, as shown in FIG. 13B, the second saddle frame 420 is slidably inserted into the first saddle frame 410 through the saddle clamping unit 440 and fixed.

The second buffer unit 140 is disengaged from the first saddle frame 410 through the hook fixing member 411 and the hook lever 412 and the upper surface of the second lower frame 220 When the shock absorber 140 is rotated and seated, the saddle frame 410 rotates toward the rear wheel 120 side.

Next, the third handle frame 530 is inserted and fixed to the second handle frame 520 through the second handle clamping unit 550. [

Next, the sliding member 750 mounted on the handle bar 700 is pressed toward the handle bar elastic body 740, and then the third handle bar is rotated. At this time, the folding engagement groove 735 of the third handle bar 730 is engaged with the engagement member 723 mounted on the second handle bar 720, so that the rotation angle of the folding axis of the third handle bar 730 is limited do.

The second handle frame 520 inserted in the first handle frame 510 and the second handle frame 520 exposed in the upper part are inserted through the first handle clamping part 540 provided in the second handle frame 520, The second handle frame 520 is folded toward the rear wheel 120 side. At this time, the second handle frame 520 is fitted and fixed to the front split hole 413a of the saddle 430.

Thereby, the folding bicycle 100 is folded.

<First Method of Bicycling>

13B, when the bicycle 100 is folded, the second handle frame 520 exposed on the upper portion of the first handle frame 510 is rotated, and the first handle clamping unit 540 rotates the second handle frame 520, The second handle frame 520 inserted in the frame 510 is linearly coupled to each other and the third handle frame 530 is drawn out from the second handle frame 520 by the second handle clamping unit 550, do.

Next, as shown in FIG. 13A, when the third handle bar 730 is rotated, it is fixed in parallel with the second handle bar 720. At this time, the unfolding angle of the third handle bar 730 is limited by the engagement of the release latch groove 734 formed in the third handle bar 730 with the latch member 723 of the second handle bar 720. The second handle bar groove 733 formed on the third handle bar 730 is aligned with the first handle bar groove 753 formed on the second handle bar 720 and the first and second folding preventing surfaces 753a and 733a Are prevented from being arbitrarily folded by the third handle bar 730 being in close contact with each other. At this time, the sliding member 750 is naturally returned to the engagement position by the restoring force of the handle bar elastic body 740. In addition, when the third handle bar 730 is folded and mutually contacts, the curved longitudinal sides of the second and third handle bars 700 are mutually slid as the third handle bar 730 is unfolded, The matching of the bar grooves 753 and 733 is naturally accomplished.

The first saddle frame 410 is pivoted and lifted so that the second cushioning device 140 is pivoted by the shaft and is rotated by the hook fixing member 411 and the hook lever 412 to the first saddle frame 410 Respectively.

Next, the second saddle frame 420 is pulled out from the first saddle frame 410 by the saddle clamping part 440 and fixed.

Next, the first lower frame 210 is fixed at the adjusted length through the first length adjusting member 300 while being pulled out from the second lower frame 220. At this time, when the length adjusting bar 330 is moved in one direction so that the engagement between the length adjusting head 320 and the length adjusting groove 212a is released, the first lower frame 210 is drawn out from the second lower frame, The length adjusting bar 330 is moved to the original position and the coupling between the length adjusting head 320 and the length adjusting groove 212a is again engaged.

Thus, the folded bicycle 100 is unfolded.

<Second way to fold the bike>

Figs. 14A and 14B are side views showing a second manner of folding the bicycle shown in Fig. 4. Fig.

The second method of folding the folding bicycle 100 according to the present invention is as follows. As shown in FIG. 14A, when the length adjusting bar 330 is unidirectionally moved, the length adjusting head 320 and the length adjusting groove 212a The first lower frame 210 is inserted into the second lower frame 220 as deeply as possible and the length adjusting bar 330 is moved so that the length adjusting head 320 and the length adjusting grooves 212a ) Is engaged.

Next, the third lower frame 230 is rotated through the first and second shaft coupling projections 224 and 231 to move the rear wheel 120 to the front wheel 110 side. At this time, the third lower frame 230 is rotated by the external force to release the engagement between the first locking protrusion 225a and the first locking groove 232, and the third lower frame 230 is rotated about the axis When the second locking protrusion 226a and the second locking groove 233 are engaged with each other, the rotation of the third lower frame 230 is completed.

Next, the second saddle frame 420 is slidably inserted into and fixed to the first saddle frame 410 through the first saddle clamping unit 440.

Next, the third handle frame 530 is inserted and fixed to the second handle frame 520 through the second handle clamping unit 550. [

Next, as shown in FIG. 14B, the sliding member 750 mounted on the handle bar 700 is pressed toward the handle bar elastic body 740, and then the third handle bar 730 is rotated. At this time, the folding engagement groove 735 of the third handle bar 730 is engaged with the engagement member 723 mounted on the second handle bar 720, so that the rotation angle of the folding axis of the third handle bar 730 is limited do.

Next, the second buffer device 140 is released from the first saddle frame 410 through the hook fixing member 411 and the hook lever 412, and the upper surface of the second lower frame 220, When the shock absorber 140 is rotated and seated, the saddle frame 410 is pivoted to the rear wheel 120 side.

Next, the second saddle frame 420 is inserted and fixed to the first saddle frame 410 through the saddle clamping unit 440.

The second handle frame 520 inserted in the first handle frame 510 and the second handle frame 520 exposed in the upper part are inserted through the first handle clamping part 540 provided in the second handle frame 520, The second handle frame 520 is folded toward the rear wheel 120 side. At this time, the second handle frame 520 is fitted into the front split hole 431a of the saddle 430. [

Thereby, the folding bicycle 100 is folded.

<Second way to bike>

14B, when the bicycle 100 is folded, the second handle frame 520 exposed on the upper portion of the first handle frame 510 is rotated while the first handle clamping portion 540 is rotated by the first handle clamping portion 540, The third handle frame 530 is pulled out of the second handle frame 520 by the second handle clamping unit 550 when the second handle frame 520 inserted in the handle frame 510 is aligned with each other .

Next, as shown in FIG. 14A, when the third handle bar 730 is rotated, it is fixed in parallel with the second handle bar 720. At this time, the unfolding angle of the third handle bar 730 is limited by the engagement of the release latch groove 734 formed in the third handle bar 730 with the latch member 723 of the second handle bar 720. The second handle bar groove 733 formed on the third handle bar 730 is aligned with the first handle bar groove 753 formed on the second handle bar 720 and the first and second folding preventing surfaces 753a and 733a Are prevented from being arbitrarily folded by the third handle bar 730 being in close contact with each other. At this time, the sliding member 750 is naturally returned to the engagement position by the restoring force of the handle bar elastic body 740. In addition, when the third handle bar 730 is folded and the longitudinal sides having the curved lines of the second and third handle bars 620 and 630 are mutually sliding, the third handle bar 730 is unfolded, The matching of the bar grooves 653a and 633a is achieved naturally.

Next, the first saddle frame 410 is pivoted and raised, and the second saddle rim 140 is also rotated by the pivot so that the first saddle frame 410 ).

Next, the second saddle frame 410 is pulled out from the first saddle frame 410 by the saddle clamping part 440 and fixed.

Next, the third lower frame 230 is pivoted from the second lower frame 220 through the first and second shaft coupling protrusions 224 and 231, and the rear wheel 120 is moved rearward. At this time, due to the external force, the engagement of the second locking protrusion 226a and the second locking groove 233 is released, the third lower frame 230 is rotated, and the second lower frame 230 of the third lower frame 230, When the first locking protrusion 225a and the first locking groove 232 are engaged with each other, the rotation of the third lower frame 230 is completed.

Next, the adjusted length of the first lower frame 210 is fixed through the first length adjusting member 300 while being pulled out of the second lower frame 220. At this time, when the length adjusting bar 330 is moved in one direction so that the engagement between the length adjusting head 320 and the length adjusting groove 212a is released, the first lower frame 210 is drawn out from the second lower frame, The length adjusting bar 330 is moved to the original position and the coupling between the length adjusting head 320 and the length adjusting groove 212a is again engaged.

Thus, the folded bicycle 100 is unfolded.

As described above, those skilled in the art will understand that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. It is therefore to be understood that the above-described embodiments are to be considered in all respects as illustrative and not restrictive. The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included within the scope of the present invention.

100 ... Folding bicycle 200 ... Lower frame,
210 ... first lower frame 220 ... second lower frame,
230 ... third lower frame 300 ... first length adjusting member,
310 ... length adjusting body 320 ... length adjusting head
330 ... length adjusting bar 340 ... length adjusting elastic body,
400 ... saddle frame, 410 ... first saddle frame,
420 ... second saddle frame 430 ... saddle,
500 ... handle frame 510 ... first handle frame,
520 ... second handle frame 530 ... third handle frame,
540 ... first handle clamping part 550 ... second handle clamping part,
600 ... pedal shaft 610 ... pedal coupling part,
611 ... fastening body 612 ... pedal rotating shaft,
620 ... pedal 700 ... handlebar,
710 ... first handle bar 720 ... second handle bar,
721 ... guide slot 730 ... third handlebar,
740 ... handle bar elastic body 750 ... sliding member,
751 ... sliding body 752 ... handle,
800 ... Angle adjusting member 810 ... mounting ball,
820 ... Angle adjustment hole 830 ... Angle adjustment slot,
840 ... insertion hole 850 ... mounting hole,
900 ... auxiliary wheels 910 ... rear bar,
920 ... support bar 930 ... branch bar,
940 ... reflector.

Claims (17)

For folding bikes,
A handle frame 500 having a handle bar 700 to which a handle cover 731 is coupled and a front wheel 110 mounted to the other end;
A lower frame (200) having a rear wheel (120) and a handle frame (500), both ends of which are respectively installed to be inclined; And
A saddle frame 400 coupled to the lower frame 200 so as to selectively rotate axially at one end thereof and having a saddle 430 at the other end thereof,
The lower frame (200)
A first lower frame (210, 210 ') having one end mounted on the handle frame (500) and a plurality of length adjusting grooves (212a) formed on a part of its outer circumferential surface in the longitudinal direction;
The first lower frame 210 and the second lower frame 300 'on which the first length adjusting member 300 or the second length adjusting member 300' are mounted are slidably inserted into the length adjusting groove 212a, (220, 220 ', 220''); And
And a third lower frame 230, 230 ', 230'', one end of which is axially rotated from the second lower frame 220, 220', 220 '' and the rear wheel 120 is mounted at the other end,
The first lower frame (210)
A first body 211 having a length inserted into the second lower frame 220 at one end thereof coupled to the handle frame 500; And
A first extension 212 protruding from the outer circumferential surface of the first body 211 toward the first length adjustment member 300 and extending in the longitudinal direction and having a plurality of length adjustment grooves 212a in the longitudinal direction; And further comprising:
The second lower frame (220)
A first insertion hole 221 formed to insert the first body 211 formed with the first extension portion 212 and communicating with the large diameter portion 311;
A saddle frame engaging part 222 which is formed such that one end of the saddle frame 400 is coupled to rotate;
A second shock absorber coupling part (223) installed to rotate with the other end of the second shock absorber (140) installed at one end of the saddle frame (400); And
And a first shaft coupling protrusion (224) protruding from the bottom surface of the third lower frame (230)
The third lower frame (230)
A second shaft coupling protrusion 231 formed at an end of the third lower frame 230 on the second lower frame 220 side to be engaged with the first shaft coupling protrusion 224; And
A pedal shaft through hole 234 formed at the other end of the pedal shaft 600 in which the pedal 620 is mounted by the pedal coupling portion 610 and the power transmission devices 150 and 160 are mounted Wherein the bicycle is a bicycle. The method according to claim 1,
The first length adjusting member 300 may be formed of,
A first engagement protrusion 311a protruding inward from a boundary between the small diameter portion 312 and the large diameter portion 311 is formed by a small diameter portion 312 and a large diameter portion 311, 311 are seated in the second lower frames 220, 220 ', 220''and partially buried therein, the portions embedded in the second lower frames 220, 220', 220 "(310);
A length adjusting head portion (212) which is inserted into the large diameter portion (311) so as to be coupled with the length adjusting groove (212a) while being reciprocated by an elastic force in a direction perpendicular to the longitudinal direction of the second lower frames (220, 220 '320);
A length adjusting knob 350 is fastened to the other end of the length adjusting head 320 while being spaced a predetermined distance from the length adjusting knob 350 toward the length adjusting head 320, A length adjusting bar 330 formed with a plurality of slits 360; And
And a length adjusting elastic body (340) mounted between the flange (360) and the first stopping step (311a). The method according to claim 1,
The second length adjusting member 300 '
A plurality of lever engagement grooves 310 'formed at predetermined intervals in the first extension portion 212 or the second extension portion 212' of the first lower frames 210 and 210 ';
A pair of lever engaging protrusions 320 'protruding from the upper surfaces of the second lower frames 220, 220', and 220 '' so as to face each other;
A curved surface portion 331 'interposed between the lever engaging projections 320' to seesaw motion; a second curved surface portion 331 'bent at one end of the curved surface portion 331' A lever 330 'provided with a bent portion 332' which passes through the through hole 321 'formed in the lever engagement groove 310' and is selectively fitted into the lever engagement groove 310 '; And
And a lever elastic body 340 'disposed and fixed between the curved surface portion 331' and the second lower frames 220, 220 ', and 220''to restore the seesaw motion of the lever 330' Wherein the bicycle is a bicycle. delete The method according to claim 1,
The first lower frame 210 '
A second body 211 'having a length inserted into the second lower frame 220' at one end thereof coupled to the handle frame 500; And
The second frame 220 'is spaced apart from the second body 211' so as to be inserted into the second lower frame 220 'while being coupled to the handle frame 500 at one end thereof. And a second extending portion 212 'having a groove 212a formed therein,
The second lower frame 220 '
A second insertion hole 221 'through which the second body 211' of the first lower frame 210 'is inserted;
An extension portion insertion hole 221 '' into which the second extension portion 212 'of the first lower frame 210' is inserted and which communicates with the large diameter portion 311 of the first length adjustment member 300, ;
A saddle frame engaging part 222 which is formed such that one end of the saddle frame 400 is coupled to rotate;
A second shock absorber coupling part (223) installed to rotate with the other end of the second shock absorber (140) installed at one end of the saddle frame (400); And
And a first shaft coupling protrusion 224 protruding from the bottom surface of the third lower frame 230 '
The third lower frame 230 '
A second shaft coupling protrusion 231 formed at an end of the third lower frame 230 on the second lower frame 220 side to be engaged with the first shaft coupling protrusion 224; And
And a pedal shaft through hole 234 formed at the other end of the pedal shaft 600 having the pedal 620 mounted at one end thereof by the pedal engagement portion 610 to be mounted on the power transmission devices 150 and 160 Wherein the folded bicycle is a foldable bicycle. The method according to claim 1,
The second lower frame 220 &quot;
The first body 211 and the first extension 212 or the second extension 212 'of the first lower frame 210 and 210' are formed to be inserted therein. A first insertion hole 221 formed to allow the large-diameter portion 311 to pass therethrough;
A saddle frame engaging part 222 which is formed such that one end of the saddle frame 400 is coupled to rotate;
A second shock absorber coupling part (223) installed to rotate with the other end of the second shock absorber (140) installed at one end of the saddle frame (400); And
And a mounting hole 810 formed at the lower end of the third lower frame 230 '',
The third lower frame 230 &quot;
A pedal shaft through hole 234 through which the other end of the pedal shaft 600 mounted at one end of the pedal 620 is connected by the pedal coupling portion 610 to be mounted to the power transmission devices 150 and 160; And
And a mounting hole (850) formed to be axially coupled to the mounting hole (810) through a mounting member (851). 7. The method according to any one of claims 1, 5 and 6,
The first and second extension portions 212 and 212 'of the first and second lower frames 210 and 210' are formed at the ends of the second lower frames 220, 220 ', and 220' And a separation preventing member (213) mounted on the bicycle. The method according to claim 1,
Further comprising rotation angle restricting means for restricting a rotation angle of the second lower frames (220, 220 ', 220 ") and the third lower frames (230, 230', 230"
The rotation angle restricting means,
A pair of lower projecting portions projecting downward from the one end of the second lower frames 220, 220 ', 220''toward the third lower frames 230, 230', 230 " A first protrusion 225 having a first protrusion 225a formed to face each other;
And a pair of lower projections protruding downward toward the third lower frames 230, 230 ', and 230 "at the longitudinal center portions of the second lower frames 220, 220', 220" A second protrusion 226 formed with a second protrusion 226a;
A first latching groove 232 formed on both sides of one end of the third lower frame 230, 230 ', 230''to be engaged with the first latching protrusion 225a of the first protrusion 225; And
And second latching grooves 233 formed on both sides of one side end of the third lower frame 230, 230 ', 230''to be engaged with the second latching protrusion 226a of the second latching protrusion 226 A folding bicycle that is multifarious. The method according to claim 1,
Further comprising rotation angle restricting means for restricting a rotation angle of the second lower frames (220, 220 ', 220 ") and the third lower frames (230, 230', 230"
The rotation angle restricting means,
A pair of upper protrusions protruding upward from the one end of the third lower frames 230, 230 ', 230''toward the second lower frames 220, 220', 220 " A third protrusion 232 'formed with a second protrusion 232a'.
And a pair of second lower frames 220, 220 ', and 220 "projecting from the third lower frames 230, 230', 230" in the longitudinal direction at the lower ends of the first lower frames 220, 220 ' A fourth protrusion 233 'formed with a locking protrusion 233a';
A third engagement groove 225 'formed on both sides of one end of the second lower frame 220, 220', or 220 '' to be engaged with the third engagement protrusion 232a 'of the third projection 232'; And
And fourth engagement grooves 226 'formed on both lower sides of the second lower frames 220, 220', 220 '' to engage with the fourth engagement protrusions 233a 'of the fourth projections 233' Wherein the bicycle is a bicycle. The method according to claim 6,
Further comprising rotation angle restricting means for restricting a rotation angle of the second lower frame (220 '') and the third lower frame (230 '')
The rotation angle restricting means,
Is formed on the lower surface of the second lower frame 220 '' so as to form the mounting holes 810, and is formed as a pair of one side and the other side facing each other, and the third lower frame 230 ''. A plurality of angle adjusting holes 820 formed to be coupled with the length adjusting head 320 in accordance with the axial rotation curvature of the angle adjusting hole 820 and a length adjusting bar 330 passing through the angle adjusting hole 820 along the curvature of the angle adjusting hole 820 An angle adjusting member 800 including an angle adjusting slot 830 formed therein;
A pair of insertion holes 840 formed at one end of the third lower frame 230 '' on the side of the second lower frame 220 '' so that the pair of angle adjusting members 800 are respectively inserted;
A third length adjusting member 300 'installed in the angle adjusting slot 830 so as to extend through the length adjusting bar 330 while the length adjusting head 320 is disposed to be selectively coupled to the angle adjusting hole 820''); And,
The third length adjusting member 300 &quot;
A first engaging protrusion 311a protruding inward from a boundary between the small diameter portion 312 and the large diameter portion 311 is formed in the large diameter portion 312 and the large diameter portion 311, A length adjusting body 310 'formed by cutting a part of the length adjusting head 320 to be fastened to the angle adjusting hole 820;
A length adjusting knob 350 is fastened to the other end of the length adjusting head 320 while being spaced a predetermined distance from the length adjusting knob 350 toward the length adjusting head 320, A length adjusting bar 330 formed with a plurality of slits 360; And
And a length adjusting elastic body (340) mounted between the flange (360) and the first stopping step (311a). The method according to claim 1,
The saddle frame (400)
A first saddle frame 410 fastened to the second lower frames 220, 220 ', 220''so that one end is axially rotated and one end of the second cushioning device 140 is detachably fastened to an intermediate portion; And
And a second saddle frame 420 slidably inserted into the upper portion of the first saddle frame 410 through a saddle clamping unit 440 and having a saddle 430 mounted on an upper end thereof. A multi-folded folding bike. The method according to claim 1,
The saddle 430 is narrower in width than the buttock-side rear portion 433 of the saddle-side front portion 431 and the front portion 431 and the rear portion 433 are connected to the center portion 432 side, (431a) and a rear split hole (433a) are formed and are divided into two parts. The method according to claim 1,
The handle frame (500)
A first handle frame (510) having one end of the first lower frame (210, 210 ') coupled to a portion thereof and the front wheel (110) disposed at a lower portion thereof;
A second handle frame 520 inserted into the first handle frame 510 and connected to the front wheel 110 so as to rotate axially toward the lower frame 200 through a first handle clamping unit 540; And
And a third handle frame 530 installed to be slidable with respect to the second handle frame 520 through the second handle clamping unit 550 and having the handlebar 700 mounted on one end thereof A folding bicycle that is multifarious. 13. The method according to claim 1 or 12,
The handle bar (700)
A first handle bar 710 mounted on the handle frame 500;
A pair of guide slots 721 each of which is coupled to both ends of the first handle bar 710 and which are longitudinally opposite to each other at opposite ends of the coupling portion, A second handle bar 720 including an engaging member 723 vertically penetrating through the guide slot 721 and a second handlebar engaging hole 722 formed at an end of the guide slot 721 side;
A pair of handle bar elastic bodies 740 inserted into the second handle bar 720, respectively;
A sliding body 751 to be inserted into the second handle bar 720 to receive an elastic force from the handlebar elastic body 740 and a sliding body 751 to be inserted into both ends of the sliding body 751 A handle portion 752 formed at an end portion and a first handlebar groove 753 having a length longer than the length of the other side of the first handlebar groove 753, A pair of sliding members 750; And
A first handle bar engaging hole 732 formed in a part of the second handle bar 720 to press the sliding member 750 to be pivotally coupled with the second handle bar engaging hole 722, A folding engagement groove 734 and a folding engagement groove 735 formed on one side of the handle 723 so as to be engaged with the engagement member 723 when the handlebar 723 is folded or unfolded by rotation, A cover 731 and a second handle bar groove 733 formed at a terminating end of the third handle bar 730 in a shape corresponding to the first handle bar groove 753 to be aligned with the first handle bar groove 753 And a third handle bar (730) including a pair of third handle bars (730). 14. The method of claim 13,
The first and second handlebar grooves 753 and 733 have a longer side surface, and the first and second handlebar grooves 753 and 733 are aligned with each other. When the first and second handlebar grooves 753 and 733 are aligned with each other, Preventing surfaces (753a, 733a). 7. The method according to any one of claims 1, 5 and 6,
The pedal engaging portion 610,
A fixing protrusion 611c partially inserted into the coupling body insertion hole 601 formed at one end of the pedal shaft 600 and fixedly coupled to the outer circumferential surface of the pedal shaft 600 on the opposite side of the pedal shaft 600, A first stepped locking protrusion 611b protruding from an outer circumferential surface not inserted into the first stepped locking protrusion 611b; And
The shaft rotating head portion 612a (612a) having the second step locking protrusion 612b formed to engage with the first step locking protrusion 611b to limit the shaft rotation opening angle, And a shaft rotating bar 612c extending from the shaft rotating head 612a and passing through the pedal 620 so that the pedal 620 is rotatable, Included,
The shaft rotating head portion 612a is formed with a fastening body groove 612d into which the fastening body 611 is fitted,
The bottom surface 612e of the fastening body groove 612d is prevented from interfering with the end of the fastening body 611 on the shaft rotating head 612a side when the shaft rotating head 612a is rotated, Is formed so as to interfere with the fixing protrusion (611c) at the time of completion of the folding operation. The method of claim 1, wherein
A branch bar 930 having one end mounted on the third lower frame 230, 230 ', 230''and branched from the other end toward the rear wheel 120; And
And a pair of auxiliary wheels 900 installed on the branch bar 930 so as to raise the bicycle when the third lower frames 230, 230 ', and 230''are vertically rotated. Multivariable folding bike.

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