CN2170261Y

CN2170261Y - Foldable bicycle

Info

Publication number: CN2170261Y
Application number: CN 93222519
Authority: CN
Inventors: 周登桂
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-09-06
Filing date: 1993-09-06
Publication date: 1994-06-29
Anticipated expiration: 2003-09-06

Abstract

The utility model relates to a folding type bicycle. The upper tube, the back upper fork set, the front fork, the handle and the pedals of the bicycle can be folded. The connecting points of the lower tube, the back lower fork set and the seat tube are provided with fixing plates which can be timely folded and unfolded. When all the components of the bicycle are folded, the fixing plate is unfolded, the front wheel and the back wheel can be folded side by side. So the utility model can not only reduce the occupied volume of the bicycle when folded, but also be supported by the matching of each component when unfolded, and can obtain a more stable and firmer structure.

Description

Foldable bicycle

The relevant a kind of bicycle of the utility model, be meant especially a kind of group cube just, folding fast speed folding cycle.

The folding cycle that drives for short range provides to people and can be folded into smaller volume at any time so that carry, carrying, or the convenience of launching at any time.Existing in the past a kind of folding cycle sees also shown in Figure 1ly, and described bicycle is to utilize six connecting rods (2) that vehicle frame (1) integral body is strutted and constitute firm structure.As shown in Figure 2, when folding, six connecting rods (2) are center of turn with pivoting point (3), and the connecting rod (2) of vehicle frame (1) can be stacked together mutually, the volume that takies with minimizing.

Though above-mentioned folding cycle can reach the purpose of folding bicycle frame, but, compare mutually by Fig. 1,2 expansion, folding scheme drawing, then among Fig. 2 the length of the front fork of folding of bicycle and handle, seat pipe and Chain stay all change, and just the length between front and rear wheel is dwindled into by original (L) (L '), not only the change of length is quite little, and handle, the shared width of two pedals still exist, and can't provide effects such as easy installation, carrying convenience effectively, and when packing and carrying, more can waste packing and carrying space.

Main purpose of the present utility model is to provide a kind of folding cycle, but members such as wherein said vehicle frame, front fork, handgrip, Seat stay group, Chain stay group and pedal are all made folding state, thereby not only but folding becomes the smaller size smaller shape and reduces packing and landed cost, and the structure of organizing after standing is quite solid.

Characteristics of the present utility model are: described adapter plate be by lower sheet space and upper sheet space wherein a side activity articulate and form, and described pipe down is to be connected with lower sheet space, described seat pipe then is connected with lower sheet space with the Chain stay group, front fork, handgrip group, on after the member folding such as pipe, Seat stay group, pedal, described upper sheet space and lower sheet space are that center of turn outwards launches about 180 degree with the side that articulates, just can make front-wheel, trailing wheel be shape side by side, and form the folding cycle of smaller size smaller.

According to folding cycle provided by the utility model mainly is to be provided with front fork and handgrip group at the vehicle frame front end, and the rear end is upper and lower fork group together support trailing wheel behind the mat then.Wherein said vehicle frame comprises pipe, down pipe, two auxiliary rods, seat pipe, group adapter plate, and upward members such as pipe, auxiliary rod, described group of adapter plate, Seat stay group, handgrip all can be amounted in good time or support and organize upright.By this, after each member can being amounted to one by one overall volume is dwindled, and convenient packing, collection or carrying, and then can save and take up room and reduce landed cost, and support group and can obtain solid firm bicycle structure again after upright, with the safety of guaranteeing to drive.

Below by most preferred embodiment and accompanying drawing the utility model is elaborated, in the accompanying drawing:

Fig. 1 is a folding cycle expansion scheme drawing in the past.

Fig. 2 is the folding scheme drawing of folding cycle in the past.

Fig. 3 is the exploded perspective view of the utility model one preferred embodiment.

Fig. 4 is the upright scheme drawing of the group of the above-mentioned preferred embodiment of the utility model.

Fig. 5 is an A portion enlarged drawing in the above-mentioned preferred embodiment of the utility model.

Fig. 6 be the above-mentioned preferred embodiment of the utility model wherein handgrip and seat cushion fold scheme drawing.

Fig. 7 is the scheme drawing that folds that pipe and auxiliary rod are wherein gone up in the above-mentioned preferred embodiment of the utility model.

Fig. 8 be the above-mentioned preferred embodiment of the utility model wherein the Seat stay group fold scheme drawing.

Fig. 9 is that scheme drawing is finished in the above-mentioned preferred embodiment folding of the utility model.

Figure 10,11 and 12 be the above-mentioned preferred embodiment of the utility model wherein handgrip group and front fork amount to the action scheme drawing.

Figure 13 and 14 be the above-mentioned preferred embodiment of the utility model wherein seat cushion amount to and adjust the action scheme drawing.

Figure 15 be the above-mentioned preferred embodiment of the utility model wherein go up pipe amount to the action scheme drawing.

Figure 16 and 17 be wherein said group of adapter plate of the above-mentioned preferred embodiment of the utility model amount to the action scheme drawing.

Figure 18 and 19 be the above-mentioned preferred embodiment of the utility model wherein pedal amount to the action scheme drawing.

Figure 20 is the pivot joint scheme drawing of wherein said group of adapter plate of the above-mentioned preferred embodiment of the utility model.

Please cooperate and consult Fig. 3, the utility model folding cycle includes one group of adapter plate (10), seat pipe (20), seat cushion montant (30), saddle locating device (40), goes up pipe (50), following pipe (60), two auxiliary rods (70), front fork (80), joint seat (90), group handgrip (100), positioning seat (110), two clamping blocks (120), group fastener (130), Seat stay group (140), Chain stay group (150), two cranks members such as (160).

Described adapter plate (10) is made up of the upper sheet space (11) and the lower sheet space (12) of rectangle, the symmetrical side of described upper and lower plate (11) (12) respectively is provided with pivot ear (117) (127), mat pivot pin (171) runs through described pivot ear (117) (127), can described upper and lower plate (11) (12) is overlapping, one side is articulated be integral, another side then can be raised at any time or be closed.Please cooperate shown in Figure 16, described upper sheet space (11) is provided with predetermined number with respect to another side of pivot ear (117), with the bolt is the lock member (118) of example, the cramp (13) of making Qian shape can be located on the described lock member (118), the both sides of the described cramp of mat (13) can be buckled upper and lower plate (11) (12) and be formulated the position, are locked in described lock member (118) with nut (137) again and go up and described cramp (13) packing is located.In addition, be installed with sleeve pipe (14) on the top of described upper sheet space (11), arbor assembly (147) is arranged on sleeve pipe (14) inside, the other end then forms junction surface (15), both sides, described junction surface (15) respectively are provided with a fastening part (157), the appropriate position inboard in described junction surface (15) is provided with two positioning tabs (16), is equipped with pivot pin (172) on described two positioning tabs (16).Described lower sheet space (12) also is provided with a pivot portion (18) with respect to the end that upper sheet space (11) is provided with sleeve pipe (14).

Described seat pipe (20), please cooperate consult shown in Figure 13, its bottom is provided with two fork arms (21), can be articulated in the pivot pin (172) on described upper sheet space (11) top rotationally in good time, inside, top is provided with hole (22), in the position near the top is the protruding seat (23) that is installed with hollow cylindrical, the inner set seat hole (231) of described protruding seat (23) connects with described hole (22), and form shrouding (232) in described protruding seat (23) outer end, described shrouding (232) central authorities are provided with the perforation (233) than minor diameter, be installed with one group of auricle (24) in described protruding seat (23) bottom, be equipped with a pivot pin (173) on the described auricle (24).

Described seat cushion montant (30), please cooperate and consult shown in Figure 13 and 14, be plugged in described seat pipe (20) inside, be symmetrical in a wherein side of described protruding seat (23), be provided with a row along long axis direction and have the snap portion (31) that predetermined number is the helical teeth shape, the end face bevel (311) of described snap portion (31), plane (312) is then made in the bottom surface, respectively is formed with a draw-in groove (32) between two snap portions (31).

Described saddle locating device (40), please cooperate and consult shown in Figure 13 and 14, include clamping block (41), elastic element (42) and control handle (43), described clamping block (41) penetrates and is installed in the seat hole (231) of described protruding seat (23) from the hole (22) of described seat pipe (20), wherein an end has the pipe link (411) than minor diameter, and passes and protruding described protruding seat (23) outside that is exposed at from described perforation (233); The other end then cooperates snap portion (31) the helical teeth shape of described seat cushion montant (30), make end and be the embedding system portion (412) of tip-angled shape, described elastic element (42), present embodiment is to be example with the compression spring, be installed in described protruding seat (23) inside, and be positioned between described shrouding (232) medial surface and clamping block (41), can hold described clamping block (41) and move, and the described embedding system portion (412) and snap portion (31) buckle of described seat cushion montant (30) are located towards seat cushion montant (30) snap portion (31).Described control handle (43) is made＜type, manage on the pivot pin (173) of (20) side at described seat near the rotatable earth's axis pivot in the turnover position (431) of central authorities, and make described control handle (43) the wherein slotted hole (433) that is provided with of the pull handle of an end (432) end and terminal movable pivot joint of the pipe link (411) of described clamping block (41), the other end then is provided with lever (434).

The described pipe (50) of going up, please cooperate and consult Figure 15, make two parallel breeches pipe shapes, and go up pipe (51) before blocking and go up pipe (52) with the back, go up pipe (51) before described and offer transverse concave groove (511) with respect to an end of going up pipe (52) after described, and the end that pipe (52) is gone up in described back is the appropriate position of directly managing (20) at described seat, and be pivoted with Jiong type clasp (521) and moving plate (522) with the described preceding symmetrical end of pipe (51) groove (511) of going up, the described clasp of mat (521) is buckle or break away from described groove (511) in good time, can make described before, combination of pipe (51) (52) or separation on the back.

Described (60) one ends of pipe down are to be articulated in the axle pivot portion (18) of described lower sheet space (12) with pivot pin (174).

Described two auxiliary rods (70) end is articulated in the described appropriate position of going up pipe (50) and managing (60) down respectively, a relative end axle pivot is rotatable state, and the nearly articulated section of the auxiliary rod (70) that is positioned at the below is provided with catch (71) and can conflicts with another auxiliary rod, and two auxiliary rods (70) can only unidirectionally be amounted to.

Described front fork (80), please cooperate and consult Figure 10, the side on nearly top articulates with a following end of managing (60) with supplying the described preceding pipe (51) of going up, and one side is provided with a pivot portion (81) on the top, opposite side then is provided with Ka Gou (82), and its bottom articulates front-wheel (181).

Described joint seat (90), please cooperate and consult Figure 10, comprise the main body (91) that forms by vertical cylinder, and being fixedly arranged on the hollow form faucet pipe (92) of its both sides respectively, described main body (91) bottom one side is provided with pivot ear (911) pivot pin (175) with respect to the axle pivot portion (81) of described front fork and passes described axle pivot portion (81) and described pivot ear (911) and make described joint seat (90) appropriateness be located at described front fork (80) top rotationally.Extend outward the locating rack (912) of long plate shape approximately with respect to the position of described Ka Gou (82) in another side central authorities, described locating rack (912) is terminal and respectively be provided with a pivot pin (176) (177) than inner side.The inner opening seat hole (921) up that respectively is provided with of described two faucet pipes (92).

Described group of handgrip (100), please cooperate and consult Figure 10, be that cylinder (101) with two inverted L shapes is constituted, the seat inside, hole (921) of described faucet pipe (92) is just stretched in the bottom of described two cylinders (101), and the flat segments on top is grip part (102).

Described positioning seat (110), please cooperate and consult Figure 10, make microscler plate, dual-side respectively is provided with a projection (111), the central authorities of described projection (111) respectively are provided with a perforation (112) again, can pass for the cylinder (101) of described handgrip (100), and the bottom face at described projection (111) is provided with wavy embedding part (113) along its anchor ring, and at the middle position of described positioning seat (110) the rear side locking plate (114) that stretches out, described locking plate (114) end is pivoted with the plate (115) of suitable length.In addition, side at described locking plate (114) is provided with extension spring (116), impel the end of described extension spring (116) can be hooked on the symmetrical position of described joint seat (90) locating rack (912) side, make described positioning seat (110) and described joint seat (90) connect.

Described two clamping blocks (120), please cooperate and consult Figure 10, make hollow cylindrical, be to follow described positioning seat (110) afterwards and sheathed and be welded on described handgrip (100) cylinder (101) positon of near bottom, its top end face cooperates the embedding part (113) of described projection (111), also be provided with wavy embedding system portion (121), make described embedding part (113) and embedding system portion (121) engagement in good time.

Described fastener (130), please cooperate and consult Figure 10, comprise fixed hook (131), pull bar (132) and connecting rod (133), be installed in described joint seat (90) one sides, wherein, described fixed hook (131) is made inverted L shape, contiguous turning point is connected on described locating rack (912) and is positioned on the inboard pivot pin (177), the bottom then forms button hook (1311), in time buckle is in the Ka Gou (82) of described front fork (80), and terminal reaching respectively is equipped with a pivot pin (178) (179) again than the inner side place on its top, and an end of described plate (115) is hubbed on the described pivot pin (179).The top system of described pull bar (132) is provided with the spacer (1321) of an expansion shape, described spacer (1321) can appropriateness be hubbed on the terminal pivot pin (176) of described joint seat (90) locating rack (912) rotationally, can be and be arranged with along the rectangular block (1322) of pull bar (132) longitudinal sliding motion near the place, bottom, between described spacer (1321) and rectangular block (132b), be arranged with a compression spring (1323), and then be installed with lever (1324) at described pull bar (132) extreme end place.Described connecting rod (133) is the L type, and the top activity is articulated on the terminal pivot pin (178) of described fixed hook (131), and end then is locked in the side of described rectangular block (1322) with screw (1331).

Described Seat stay group (140) is arranged on two fork arms (21) of described seat pipe (20), and formed with two poles (141) (142) pivot joint, and wherein a pole (141) top is hubbed on described two fork arms (21) rear, and be provided with resistance sheet (1411) in nearly articulated section, can conflict with another pole (142), and another pole (142) end is to be hubbed on the wheel hub of described trailing wheel (182), and impels two poles (141) (142) can only do unidirectional amounting to.

Described Chain stay group (150) is located at the both sides of described trailing wheel (182), wherein an end is articulated on the wheel hub of described trailing wheel (182), please cooperate consult shown in Figure 20, the other end then is provided with plectane (151), described plectane periphery appropriate position is provided with card (152), and described plectane (151) can be articulated on the junction surface (15) of described upper sheet space (11) in good time rotationally, and described card (152) is located with (157) blocking of described fastening part.

Described two cranks (160), please cooperate and consult shown in Figure 18 and 19, the top is the main shaft two ends that are installed in described arbor assembly (147), the bottom then is provided with vertical with crank (160) and parallel with adapter plate (10) fix shaft (161), described fix shaft (161) side is provided with stop section (1611), and the side of pedal (162) also the axle pivot pivot joint block (163) is arranged, also be provided with limiting section (1631) on the described pivot joint block (163), the described limiting section of mat (1631) cooperates with stop section (1611), makes described pedal (162) and crank (160) can only do unidirectional amounting to.

The above be the utility model folding cycle its each assembly dependency structure and the general introduction of position.

Secondly, the effect statement that again the utility model folding cycle can be reached as after, please cooperate reference graphic:

At first, see also shown in Fig. 4 and 5, when folding cycle group of the present utility model immediately, described vehicle frame partly is subjected to described adapter plate (10), goes up pipe (50), down the support of pipe (60), two auxiliary rods (70), seat pipe (20), Seat stay group (140) and Chain stay group (150) member of etc.ing quite solid with firmly, and described front fork (80) and described group of handgrip (100) also are subjected to the effect of joint seat (90), positioning seat (110), clamping block (120) and fastener (130) and stably are located at the front end of car body.As for described seat cushion montant (30), because described clamping block (41) is subjected to the elastic-restoring force effect of described elastic element (42), be can be by elastic element (42) hold and stretch out towards hole (22) direction of described seat pipe (20), and because of described hole (22) the sheathed described seat cushion montant in inside (30), so the embedding system portion (412) of clamping block (40) but in the draw-in groove (32) of buckle between described seat cushion montant (30) two snap portions (31), and the end face of described embedding system portion (412) just holds the bottom, plane (312) in described snap portion (31), the inclined-plane of bottom is also smooth with its inclined-plane (311), and described seat cushion montant (30) can supportedly be located.

The bicycle desire carrying of finishing when combinations thereof, packing, collection and need fold to dwindle when taking volume, comply with following operational motion and just can finish:

(1) sees also Fig. 6 and shown in Figure 11, earlier with outwards pulling of described pull bar (132), the restoring force of the described compression spring of mat (1323), as long as bestowing less strength just can pull it, and after described connecting rod (133) is pulled, its top is the top of described fixed hook (131) pushing tow a little upwards, impels described button hook (1311) to break away from buckle to described Ka Gou (82).Simultaneously, described plate (115) also moves partially along with described fixed hook (131) top and makes described positioning seat (110) eliminate the press power of described clamping block (120).At this moment, member more than the described front fork (80) is ［ as joint seat (90), handgrip (100) ... Deng, with described axle pivot portion (81) is center of turn and forward end is rotated, simultaneously, see also shown in Figure 12ly,, spend so described two cylinders (101) all inwardly can be rotated 90 because described embedding part (113) separates with embedding system portion (121), make described grip part (102) all be positioned at the both sides of described front-wheel (181), reach and dwindle the purpose that takes up room.

When above-mentioned folding state, described extension spring (116) can prevent that described group of handgrip (100) breaks away from the seat hole (921) of described faucet pipe (92) when bending.

(2) please consult Fig. 6 and shown in Figure 14 again, when desiring to make the height decline of described seat cushion montant (30), one end that described control handle (43) need only be had lever (434) is suppressed towards seat pipe (20) direction, position (431) meeting of then transferring be that center of turn rotates a little with described pivot pin (173), make the pull handle (432) of the other end outwards moving partially, in case and pull handle (432) produces moving partially, the pipe link (411) that just can spur described clamping block (41) outwards moves ［ described elastic element (42) confined state and store back the ability of releasing ］, described embedding system portion (412) also can break away from described draw-in groove (32) simultaneously, can remove the restriction that described seat cushion montant (30) is subjected to buckle this moment, landing downwards along described hole (22) and automatically, when arriving extreme lower position, as long as loosen compacting to described control handle (43), the restoring force effect of the described elastic element of mat work (42), described embedding system portion (412) is pushed back and with draw-in groove (32) engagement of described seat cushion montant (30).Therefore, turn down seat cushion montant of the present utility model (30) position, must be with hand tool, so quite convenient and quick in operation.

(3) then, see also Fig. 7 and shown in Figure 15, when desiring the folding bicycle frame part, earlier that described moving plate (522) is upwards cocked, then described clasp (521) is linked, can break away from the described preceding buckle of going up the groove (511) of pipe (51), and can pipe (51) compacting downwards will be gone up before described, then described two auxiliary rods (70) are in case after being suppressed, articulated section that can middle position is a center of turn and amounting to towards specific direction, goes up pipe (51) before making and levels off to described pipe (60) down.

(4) then, as shown in Figure 8, described adapter plate (10) is cocked up, make the axle pivot portion (18) at its two ends and junction surface (15) produces turnover respectively with following pipe (60) and Chain stay group (150) effect, and then before making, distance between trailing wheel (181) (182) is dwindled, and described seat pipe (20) recedes, and two poles (141) (142) of described Seat stay group (140) also are center of turn with the articulated section, amount to towards the opposite sense that described resistance sheet (1411) is provided with, with dwindle seat pipe (20) and Chain stay group (150) between distance.Simultaneously, see also shown in Figure 18 and 19, described pedal (162) upwards can be pulled, and be fitted in the side of described crank (160), with pedal (162) folding.

(5) see also shown in Fig. 9 and Figure 16 and 17, unscrew described nut (137), make described cramp (13) break away from constraint to upper and lower plate (11) (12), the pivot ear (117) (127) of described upper sheet space (11) and lower sheet space (12) can be a center of turn and outwards launching with pivot pin (171), make and be 180 degree between upper and lower plate (11) (12) approximately, simultaneously, described front and rear wheel (181) (182) forms the folding cycle of smaller size smaller side by side.

Therefore, folding operation of the present utility model is quite simple, action is quick, and the volume after folding is quite little, and can reduce occupation space when carrying, reduce Packing Fee, and cost-cutting.

What deserves to be mentioned is, please cooperate consult shown in Figure 13, when the utility model bicycle at the upright state of group and desire when adjusting described seat cushion montant (30) and having higher height, can directly described seat cushion montant (30) be pulled upwardly, and when described seat cushion depression bar (30) is pulled, partly can produce the effect of guiding with the inclined-plane (311) of described clamping block (41) embedding system portion (412) buckle, and can with described embedding system portion (412) gradually thruster outwardly move, described elastic element this moment (42) is in confined state, and described control handle (43) is subjected to the drive that clamping block (41) moves, can be that center of turn is done moderately rotation also with described pivot pin (173), wedge angle end up to described embedding system portion (412) is crossed the increment of described snap portion (31), be subjected to the elastic recovery effect of described elastic element (42), make the embedding system portion (412) of described clamping block (41) be pushed into embedding in another draw-in groove (32) again, and till when obtaining the blocking locating effect, and when operation, can produce the sound of " answering ".Therefore, in the time the height of seat cushion montant (30) will being raise, described seat cushion montant (30) directly upwards need only be pulled out and get final product, not need to operate described control handle (43), also not need to operate other assembly.If in the time of will turning down seat cushion montant (30), suppress described control handle (43) again and just can reach.So in operation quite simple and save time, laborsaving.

In sum, the disclosed structure of this case utility model embodiment, simple structure, manufacturing are assembled easily, and can reach the effect of folding reduced volume.

Claims

1, a kind of folding cycle, its vehicle frame comprise seat pipe, go up pipe, pipe, front fork, Seat stay group and Chain stay group down; It is characterized in that: described vehicle frame also comprises:

Make suitable length and be arranged on one group of adapter plate between described down pipe and Chain stay group, by upper sheet space and lower sheet space wherein a side articulate and folding mutually formation, in a side of upper and lower plate closure by Qian shape cramp with upper and lower plate button system, lock member passes described cramp and with nut locking packing; In addition, described upper sheet space wherein an end set firmly a sleeve pipe, arbor assembly is arranged on described inside pipe casing, the other end then forms the junction surface, bottom, described junction surface is provided with fastening part;

Described seat pipe bottom can be articulated on the described upper sheet space in good time rotationally;

Described going up gone up upward pipe of Guan Yuhou before pipe blocks, go up Guan Yiduan before described and be hubbed on rotationally on the front fork of bicycle, and manage joining place on forward and backward, and a side is pivoted with a clasp therein described, opposite side then offers a groove, but described clasp buckle or break away from described groove;

A described pipe down wherein end is articulated on the described front fork, and the other end also is articulated on the described adapter plate;

Described front fork and handgrip are separable, and wherein a side articulates with pivot pin, and another side then one group of fastener of mat is fixed described group of handgrip bottom and front fork buckle;

Two auxiliary rod ends are articulated in respectively describedly goes up pipe and down on the pipe, at a relative end axle pivot and rotatable, and wherein the nearly articulated section of an auxiliary rod is provided with and can conflicts with another auxiliary rod, and the catch that two auxiliary rods can only unidirectionally be amounted to;

Respectively there are two poles that articulate the both sides of described Seat stay group, and wherein the nearly articulated section of a pole is provided with and can conflicts for another pole, and the resistance sheet that two poles can only unidirectionally be amounted to;

Described Chain stay group one end is articulated in the two ends of described adapter;

The top is installed in two cranks at the main shaft two ends of described arbor assembly, two crank bottoms are provided with and are set as vertical with crank and are parallel fix shaft with adapter plate, described fix shaft side is provided with the stop section, and the side of pedal also the axle pivot pivot joint block is arranged, also be provided with limiting section on the described pivot joint block, described limiting section cooperates with the stop section, and described pedal and crank can only unidirectionally be amounted to.

2, folding cycle as claimed in claim 1 is characterized in that: be provided with joint seat, two clamping blocks, positioning seat between described front fork and handgrip in regular turn, and described group of fastener comprise fixed hook, pull bar and connecting rod, and be installed in described joint seat one side; Wherein:

Described front fork top one side is provided with the fastener of outside protrusion; Described joint seat also includes the faucet pipe that main body and both sides thereof respectively are provided with a hollow cylindrical; Described main body bottom is articulated in described front fork top, and described joint seat can appropriateness be located on the described standpipe of front fork rotationally; Another side with respect to described fastener on and reach out to a locating rack; Described fixed hook is made inverted L shape, and contiguous turning point is articulated on the described locating rack with pivot pin, but the bottom forms the button hook of a buckle on the fastener of described front fork; Described pull bar top is hubbed on the locating rack end of described joint seat rotationally, is arranged with a compression spring on it; Described connecting rod is the L type, and the top is articulated in the end, top of described fixed hook versatilely, and end then is set on the described pull bar, and is subjected to the pushing tow of described compression spring; Described handgrip bottom is provided with two cylinders, stretches into the faucet pipe inside of described joint seat; Described positioning seat dual-side respectively is provided with a perforation on the cylinder that is set in described handgrip in advance, and the periphery of described perforation bottom surface is formed with embedding part; And the central position of described positioning seat extends outward a pin sheet, and described locking plate end is pivoted with plate, and described plate end is articulated in described fixed hook top again, and is equiped with extension spring between described pin sheet and locating rack; Described two clamping blocks are made hollow cylindrical, and its top end face cooperates the embedding part of described positioning seat, also are provided with the embedding system portion of symmetrical shape, and described embedding system portion is fixed on described two cylinders, and is located at the bottom of described positioning seat.

3, folding cycle as claimed in claim 1, it is characterized in that: described seat pipe top is arranged with the seat cushion montant, and described seat cushion montant mat saddle locating device location and adjustment, wherein, a described seat pipe top wherein side is provided with the protruding seat of hollow form, and the open end of described protruding seat is provided with the perforation of smaller aperture due; Described seat cushion montant be plugged in described in pipe inner, be symmetrical in the wherein side of described protruding seat, be provided with snap portion along y direction, described snap portion is that end face is inclined-plane and the bottom surface is the helical teeth on plane; Described saddle locating device is made of slipper, elastic element and control handle, and described slipper is installed in the described protruding seat, wherein an end has less diameter, pass and stretch that to be located at described protruding seat outside from described perforation, and the other end cooperates the shape of described snap portion and the embedding system of being provided with portion, and tip-angled shape is made with respect to described snap portion by described embedding system portion; It is inner that described elastic element is installed in described protruding seat, and can hold described clamping block, makes the embedding system portion of described slipper and the snap portion fit location of described seat pipe; Described control handle has the turnover position, and the turnover position is articulated in protruding seat bottom, and wherein an end and described slipper one end articulate.