TWM538014U - Folding bike - Google Patents

Description

foldable bicycle

The present invention relates to a folding bicycle, and more particularly to a folding bicycle structure suitable for carrying out movement after folding and folding.

The folding bicycle structure is known to provide a turning device at the main frame tube of the frame, and a folding device between the front fork and the handle tube, and after the bicycle is finished riding, the two can be loosened. The turning device folds the handle tube close to the front wheel, and folds the main frame tube to make the front wheel and the rear wheel juxtaposed, and then the front and rear wheels are positioned by a fastening tape, thereby reducing the frame volume for convenient collection. Place it together to reduce space usage. However, due to the folding of the folding bicycle, only the frame size can be reduced, and the weight of the whole vehicle remains unchanged before and after folding, so that lifting the frame by hand is quite laborious. To this end, the manufacturer thinks that a wheel is installed at the bottom end of the seat tube of the seat, and when the frame is unfolded and the seat tube is at a normal height, the wheel at the bottom end of the seat tube leaves the ground, leaving only the front wheel and the rear of the bicycle. The wheel travels against the ground in the front-rear direction, and when the frame is folded after the ride is completed, the seat tube can be moved downward to adjust the wheel at the bottom end of the seat tube to the ground, so that the folded frame Three wheels, such as the wheels of the front wheel, the rear wheel and the bottom end of the seat tube, contact the ground, and the user can carry out the movement of the folding bicycle, which is widely praised by the user upon launch.

However, although the conventional folding bicycle is equipped with wheels at the bottom end of the seat tube, the folding bicycle can be moved by hand after being folded, however, the wheel seat is fastened to the circumference of the bottom end of the seat tube by a belt. Therefore, the contour range formed by the wheel base and the wheel is larger than the contour range of the circumferential surface of the seat tube, so that the wheel seat and the wheel cannot be collected into the middle tube along with the seat tube, so that the height of the seat tube is adjusted upward. Limitation, for example, when the user wants to adjust the seat height upwards, the seat tube can only move up until the wheel is blocked by the bottom end of the middle tube and cannot move up again. Therefore, the conventional folding bicycle can not meet the needs of more users for adjusting the height of the seat. If the height of the seat must be adjusted upwards, the wheel at the bottom of the seat tube must be removed first, so that the wheel base and the wheel are not stuck in the middle. At the bottom end of the tube, the seat tube can be further raised. Therefore, when riding the bicycle, the user must first remove the wheel base and the wheel at the bottom end of the seat tube, and when the bicycle is ready to be folded, the bottom of the seat tube is used. The wheel base and the wheel are mounted so that the folding bicycle can have three wheels on the front wheel, the rear wheel and the wheel at the bottom end of the seat tube to move the folding bicycle, which causes considerable inconvenience to the user. Moreover, another problem with today's folding bicycles is that after the folding bicycle is folded, the seat tube must be moved downwards to make the wheels at the bottom end of the seat tube contact the ground, resulting in a lower height of the folding bicycle after folding, and thus some of the taller bodies are taller. The user must bend over and push the seat to push the frame, which makes it difficult for the user to walk the physical burden of the force. Therefore, the bottom end of the folding bicycle seat tube is equipped with wheels, which makes it easy to carry out the frame movement structure. However, it still has the shortcomings mentioned above and needs to be further improved.

The present invention provides a folding bicycle, comprising a frame, the frame comprising a main frame tube extending in a front-rear direction, the main end of the main tube having a longitudinal tube extending in a direction perpendicular to the front-rear direction and a middle tube a front fork is pivotally disposed on the head tube, a handle tube is disposed at a top end of the front fork, a first deflector is disposed between the front fork and the handle tube, and a front wheel is disposed on the front fork, and the front end of the front fork is disposed a first magnetic member, the main frame tube 12 is provided with a second deflector, the top edge of the middle tube is provided with a bundle member, and the outer surface of the middle tube has a rear fork extending backward in the front-rear direction, the rear fork a rear wheel is disposed, a second magnetic member is disposed at a bottom end of the rear fork, and the first magnetic member and the second magnetic member are disposed when the front wheel and the rear wheel are longitudinally disposed on a horizontal floor. The height position in the longitudinal direction is substantially equal. When the first folding device is fastened, the handle tube is fixed together with the front fork, and when the first folding device is loosened, the handle tube can be pivoted toward the ground when the When the second folding device is fastened, the main frame tube is maintained in the front-rear direction, when the second folding device is loose When the main frame tube is folded and folded, the front wheel is juxtaposed on the rear wheel side, and the first magnetic member and the second magnetic member are magnetically positioned, and includes a tube, the seat tube is disposed in the vehicle. The middle tube of the frame is tightly positioned by the bundle member, and the seat tube includes an upper end and a lower end spaced apart in the longitudinal direction, and the perforation is continuously penetrated through the upper end and the lower end to form a hole wall surface inside the seat tube. When the beam is loosened, the seat tube bundle is released, so that the seat tube can move up and down in the longitudinal direction of the middle tube, and includes a middle wheel set, the middle wheel set includes a fixing member and is combined with the fixing member a wheel seat and a wheel pivoted on a lower side of the wheel seat, the fixing member is fixed on a hole wall surface of the lower end of the seat tube, the wheel protrudes downwardly from the lower end of the seat tube, the contour of the wheel seat and the wheel The range does not exceed the range covered by the longitudinal projection of the seat tube surface. When the beam is loosened and the height is adjusted upward for the seat tube, the wheel seat and the wheel can further receive the middle tube with the lower end of the seat tube. And including a seat, the seat includes a seat frame, the seat frame is disposed at the The upper end of the tube, when the beam is elastic and adjusts the seat tube to move downward to the wheel of the middle wheel set to the ground, the first deflector is released to pivot the handle tube toward the ground, and the second turn is released The main frame tube is folded, so that the front wheel is opposite to the rear wheel side and the first magnetic member and the second magnetic member are magnetically positioned, so that the front wheel and the rear wheel are juxtaposed in the same direction, so that the vehicle The frame is folded, that is, it has three wheels on the ground and is suitable for stable movement on the ground.

The creation feature can be magnetically positioned by the first magnetic member and the second magnetic member, so that the front wheel and the rear wheel can be stably aligned in the same direction when the frame is folded. And by the arrangement of the wheel set in the lower end of the seat tube, the seat tube is lowered when the frame is folded, and the wheel of the middle wheel set and the front wheel and the rear wheel form three wheels to support the ground, thereby making the user convenient and stable. The implementation of the frame moves around. Moreover, the contour of the wheel seat and the wheel does not exceed the range covered by the longitudinal projection of the circumferential surface of the seat tube, so that when the seat tube height is adjusted, the wheel base and the wheel can be further collected into the middle tube, and the seat tube adjustment is added. The height range and the user do not need to disassemble the middle wheel set before and after riding the bicycle, so that the user can conveniently operate the folding bicycle. Moreover, a turning device is arranged between the seat and the seat tube, and the frame extending from the seat frame is provided with a rearward extending extending frame, so that the seat can be turned upwards, and the extending frame is turned toward the longitudinal direction, thereby increasing the hand. Holding the height of the frame, it is more convenient for the user to hold the frame of the extension frame by hand.

The creation of the present invention will be more clearly understood by the detailed description of the illustrative embodiments of the present invention.

As shown in FIG. 1 , FIG. 2 and FIG. 3 , the present folding bicycle 10 includes a frame 11 including a main frame tube 12 extending in a front-rear direction, and the main frame tube 12 has two ends. Each has a head tube 14 and a middle tube 16 extending longitudinally in a direction perpendicular to the front-rear direction. The frame 11 has a front fork 20 pivotally disposed on the head tube 14. A handle tube 18 is disposed at a top end of the front fork 20, and a first twister 15 is disposed between the front fork 20 and the handle tube 18. The front fork 20 is disposed. A front wheel 24 is pivoted, and a first magnetic member 30 is disposed at a bottom end of the front fork 20. As shown in FIG. 2, the first magnetic member 30 includes a post 32. The post 32 has a fixing seat 34 at one end, a magnet 36 is disposed in the fixing base 34, and a bottom end is provided at the bottom end of the front fork 20. a positioning frame 28 having a through hole 29 therein, the post 32 is disposed with a spring 38 and a through hole 29 of the positioning frame 28, and a gasket 42 is disposed thereon, and is screwed to the screw 40 The first magnetic member 30 is fixed to the positioning frame 28 by the post 32.

As shown in FIG. 1 , FIG. 2 and FIG. 3 , the main frame tube 12 is provided with a second folding device 17 . The top edge of the middle tube 16 is provided with a bundle of knots 19 , and the outer surface of the middle tube 16 has a rear surface. a fork 22, the rear fork 22 is pivotally disposed with a rear wheel 26, and a rear end of the rear fork 22 is provided with a second magnetic member 44. When the front wheel 24 and the rear wheel 26 are longitudinally disposed on a horizontal floor, the first The height positions of the magnetic member 30 and the second magnetic member 44 in the longitudinal direction are substantially equal. As shown in FIG. 3, the second magnetic member 44 includes a screw 48 having a magnetic disk 46 at one end thereof, and a fixing hole 137 at the bottom end of the rear fork 22, and a nut is screwed on the screw 48. 50 and a gasket 52, and the screw 48 is inserted through the fixing hole 137 and a gasket 52 is screwed to the screw 50 by a nut 50, and the second magnetic member 44 is fixed. It is disposed at the bottom end of the rear fork 22. When the front wheel 24 and the rear wheel 26 stand on the ground, the heights of the first magnetic member 30 and the second magnetic member 44 from the ground are substantially equal. When the first deflector 15 is fastened, the handle tube 18 is fixed together with the front fork 20, so that the handle tube 18 can be held by hand to operate the front fork 20 to control the steering of the front wheel 24 when the first reverser 15 is released. The handle tube 18 can be pivoted towards the ground. When the second folding device 17 is fastened, the main frame tube 12 is maintained in the front-rear direction, and when the second folding device 17 is released, the main frame tube 12 can be folded and folded, and the front wheel 24 is turned to the rear wheel. The 26 sides are juxtaposed in the same orientation, and the first magnetic member 30 and the second magnetic member 44 having substantially the same height are adsorbed and positioned, thereby ensuring that the front wheel 24 and the rear wheel 26 can be stably consolidated after being juxtaposed. The same orientation.

As shown in Figures 1, 4, and 5, the inventive folding bicycle 10 further includes a tube 54 including an upper end 55 and a lower end 56 spaced apart along a longitudinal direction through which the perforations 57 are continuous. The upper end 55 and the lower end 56 form a hole wall surface 58 in the seat tube 54. The circumferential surface of the seat tube 54 is axially surrounded along the center of the seat tube 54. The central axis of the seat tube 54 is perpendicular to the longitudinal direction. The system is in a parallel relationship. And an adjusting sleeve 311 is sleeved adjacent to the upper end 55 of the seat tube 54. The adjusting sleeve 311 is adjacent to the upper end 55 of the seat tube 54. The seat tube 54 is downwardly protruded from the top end of the middle tube 16 by the top end 56. The middle tube 16 is located at a suitable height, that is, the bundle member 19 is tightly positioned, and the lower end 56 of the seat tube 54 is spaced apart from the ground, and the adjustment sleeve 311 is located in the middle tube 16 Above. When the bundle member 19 is released, the bundle of the seat tube 54 is released, so that the seat tube 54 can be moved up and down in the longitudinal direction of the intermediate tube 16 to adjust the height.

As shown in FIG. 1, the present folding bicycle 10 further includes a seat 111. The seat 111 includes a seat frame 113 disposed at an upper end 55 of the seat tube 54. The end of the seat frame 113 has an extending frame 115 disposed behind the front-rear direction, and the end of the extending frame 115 forms a turning portion 117 extending in the longitudinal direction. An inverting device 131 is mounted between the chair frame 113 and the upper end 55 of the seat tube 54. The turning device 131 includes a positioning seat 133 and a latching seat 151. The chair frame 113 of the seat 111 is disposed on the latching device. The seat 151 is mounted on the upper end 55 of the seat tube 54. The front end of the engaging seat 151 is pivoted on the front end of the positioning seat 133 by a pivoting rod 135. Moreover, the engaging seat 151 has a hook lever 153 for holding the positioning seat 133. When the hook lever 153 is pulled upward to disengage the hook lever 153 from the positioning position of the positioning seat 133, the engaging seat 151 and the seat 111 can be rotated upward by 90 degrees, so that the extension frame 115 is rotated. To face the longitudinal direction, the turning portion 117 is turned toward the front-rear direction.

As shown in FIG. 4 and FIG. 5, the lower end of the seat tube 54 is provided with a middle wheel set 60. The middle wheel set 60 includes a fixing member 61 and a bearing 90 and a wheel seat 94 coupled with the fixing member 61. The wheel base 94 has a top portion 96. The top portion 96 defines a fixing hole 96. A wheel 98 is pivoted at the bottom end of the wheel base 94. The fixing member 61 is formed by the lower end 56 of the seat tube 54 extending into the through hole 57, and the wheel holder 94, the bearing 90 and the fixing member 61 are pierced by a positioning member 92, and the wheel holder 94 is provided. Provided on the lower side of the fixing member 61, the wheel 98 protrudes from the lower end 56 of the seat tube 54, and the contour of the wheel housing 94 and the wheel 98 does not exceed the range covered by the longitudinal projection of the circumferential surface of the seat tube 54. (as shown in Figure 5).

As shown in FIG. 4, FIG. 5, FIG. 6 and FIG. 7, the fixing member 61 of the middle wheel set 60 includes a first jacket 74, a second jacket 80, and the first jacket. 74 and screwing a screw 86 of the second jacket 80. The surface of the screw 86 is externally threaded, and the screw 86 has an inner screw hole 88 extending in the longitudinal direction. The fixing member 61 further includes a plurality of expansion plates 62. As shown in FIG. 4, there are four expansion plates 62. Each of the expansion plates 62 extends in the longitudinal direction to form an arc shape, and each of the expansion plates 62 has a spaced outer surface 66. And an inner concave surface 64, the outer side surface 66 of each of the expansion plates 62 has a groove 68, and the two sides of each of the expansion plates 62 are adjacent to each other, and the groove 68 is bundled by an elastic ring 72, and thus the plurality of expansion plates 62 The bundle is formed in a substantially cylindrical shape, and the outer diameter of the plurality of expansion plates 62 is smaller than the inner diameter of the through hole 57 of the seat tube 54, and the two ends of each of the expansion plates 62 have a first space spaced apart in the longitudinal direction. The inclined surface 69 and the second inclined surface 70, each of the first inclined surface 69 and each of the second inclined surfaces 70 extend obliquely from the end of the outer side surface 66 toward the inner concave surface 64. The first jacket 74 has a through hole 76 extending in the longitudinal direction. The first jacket 74 has a tapered portion 78 which abuts against the first inclined surface 69 of each of the expansion plates 62. The second jacket 80 has a threaded hole 82 extending in the longitudinal direction, the second jacket 80 has a tapered portion 84 that abuts against the second inclined surface 70 of each of the expansion plates 62, and the screw holes 82 of the second jacket 80 are aligned in the longitudinal direction. The through hole 76 of the first jacket 74. The plurality of expansion plates 62 are sandwiched by the first jacket 74 and the second jacket 80, and the screw 86 penetrates the bearing 90 and the through hole 76 of the first jacket 74 in the longitudinal direction. The screw 86 is screwed into the screw hole 82 of the second jacket 80. The fixing member 61 is placed in the through hole 57 by the lower end 56 of the seat tube 54. When the screw 86 rotates to drive the second jacket 80 to be displaced toward the first jacket 74, the tapered portion 78 of the first jacket 74 slides on the first slope 69 to open one end of each of the expansion plates 62. The second jacket 80 The tapered portion 84 slides on the second inclined surface 70 to open the other end of each of the expansion plates 62, so that the outer side surface 66 of each of the expansion plates 62 is pressed against the hole wall surface 58 of the seat tube 54, so that the fixing member 61 is fixed and positioned. The through hole 57 of the lower end 56 of the seat tube 54 is as shown in Figs. 5 and 6. The positioning member 92 has an external thread on the surface of the positioning member 92. The positioning member 92 penetrates the fixing hole 96 of the wheel housing 94 and the screw hole 88 of the screw 86. The wheel housing 94 is coupled to the fixing member 61. The lower side, and the top portion 95 of the wheel mount 94 abuts against the bearing 90, so that the wheel mount 94 can be rotated below the central axis of the fixture 61, thereby allowing the wheel 98 to rotate 360 degrees on the ground. And because the contour range of the wheel seat 94 and the wheel 98 does not exceed the range covered by the longitudinal projection of the circumferential surface of the seat tube 54, when the seat tube 54 is adjusted upwardly, the wheel seat 94 and the wheel 98 can follow The seat tube 54 is received in the middle tube 16 of the frame 11 (as shown in Fig. 7). When the beam member 19 is tightened and the seat tube 54 is adjusted to move downward until the adjustment sleeve 311 abuts against the top end of the middle tube 16, the wheel 98 at the lower end 56 of the seat tube 54 contacts the ground.

Referring to FIG. 8 , FIG. 9 and FIG. 10 , the creation operation is performed by adjusting the seat tube 54 when the folding bicycle 10 is ready to be folded and moved. The wheel 98 moving downward to the middle wheel set 60 is positioned against the ground, and the first deflector 15 is released to turn the handle tube 18 toward the ground adjacent to the front wheel 24 side, and the second deflector 17 is released to make the main frame The tube 12 is folded to allow the front wheel 24 to abut the rear wheel 26, and the handle tube 18 is folded between the front wheel 24 and the rear wheel 26, and the first magnetic member 30 and the second magnetic body have substantially the same height. The suction member 44 is magnetically positioned (as shown in FIG. 9), so that the front wheel 24 and the rear wheel 26 are stably juxtaposed together and in the same orientation, and the front wheel 24 and the rear wheel 26 are juxtaposed together, and the middle wheel set is matched The wheel 98 of the 60 is located in front of the front wheel 24 and the rear wheel 26, so that the folded frame 11 has three wheels stably supported on the ground, whereby the frame 11 can be pushed by the hand holding the seat 111. The entire movable folding bicycle 10 (as shown in FIG. 8). If the grip height is to be adjusted in accordance with the user's body and arm length, the hook lever 153 can be further pushed upward to disengage the hook lever 153 from the positioning seat 133, and can be upward. The rotation of the seat 111 causes the extension frame 115 to be turned toward the longitudinal direction, and the turning portion 117 of the extension frame 115 is turned toward the front-rear direction, as shown in Fig. 10, thereby raising the height of the frame 11 for use. The holder can hold the extension frame 115 by hand, and the turning portion 117 pushes the frame 11 to move the entire folding bicycle 10.

As shown in Figures 1 to 10, the first form of the present folding bicycle 10, as shown in Figures 11 and 12, is further in addition to the structure of the first form. An extension tube 171 is mounted between the lower end 56 of the tube 54 and the fixture 61 to form a second form of folding bicycle. That is, the structure of the second embodiment is based on the first form, and the folding bicycle 10 includes a frame 11, a tube 54 and a middle wheel set 60, and further includes an extension tube 171, the frame 11 and the seat tube The structural features of 54 and the middle wheel set 60 have been set forth in Figures 1 through 10 and the above detailed description, and will not be further described herein. In the second embodiment, the inner wall portion 58 of the lower end 56 of the seat tube 54 is further provided with an internal thread segment 59, and the extension tube 171 has a first end 173 and a longitudinal direction. The second end 175, the outer surface of the extension tube 171 has an external thread 177 extending along the first end 173 to the second end 175. A middle hole 179 extends through the first end 173 and the second end 175. A tube inner wall 191 is formed inside the 171, and the extension tube 171 is screwed to the internal thread segment 59 of the seat tube 54 by the external thread 177 of the first end 173. The positioning nut 193 is screwed on the external thread 177 of the extension tube 171, and the outer contour of the positioning nut 193 does not exceed the range covered by the longitudinal projection of the circumferential surface of the seat tube 54. When the positioning nut 193 is rotated at the external thread 177 to abut the lower end 56 of the seat tube 54, the extension tube 171 screwed into the seat tube 54 is positioned by the positioning nut 193. When the positioning nut 193 does not abut the lower end 56 of the seat tube 54 at the external thread 177, the extension tube 171 can be rotated up and down to adjust the length of the extension tube 171 protruding from the lower end 56 of the seat tube 54. The rotary lifting operation of the extension tube 171 is performed, and the wheel 92 of the middle wheel set 60 can be further fine-tuned to be positioned at a longitudinal height, thereby enabling the user to perform fine adjustment operations for various needs.

The present invention is characterized in that the first magnetic member 30 and the second magnetic member 44 are magnetically positioned, so that the front wheel 24 and the rear wheel 26 can be stably aligned in the same direction when the frame 11 is folded. And by the arrangement of the wheel set 60 in the lower end 56 of the seat tube 54, the seat tube 54 is lowered when the frame 11 is folded, and the wheel 98 of the middle wheel set 60 and the front wheel 24 and the rear wheel 26 form three wheel supports. The ground can be used to conveniently and stably push the frame 11 to move. Moreover, since the outer contour of the wheel base 94 and the wheel 98 does not exceed the range covered by the longitudinal projection of the circumferential surface of the seat tube 54, the user can make the wheel base even if the seat tube 54 is further adjusted upward. 94 and wheels 98 are received in the tube 16 of the frame 11, thereby increasing the adjustable height range of the seat 111. And, a turning device 131 is disposed between the seat 111 and the seat tube 54, and the extending frame 115 extending rearward is disposed on the seat frame 113 of the seat 111, so that the seat 111 can be turned up and the extension frame 115 can be rotated. In order to face the longitudinal direction, the height of the hand holding frame 111 is increased by the hand, and the taller user is facilitated to carry out the folding frame 11.

The basic teachings of this creation have been described in the preceding paragraphs, and many extensions and variations will be apparent to those having ordinary skill in the art. For example, the plurality of expansion plates 62 of the fasteners 61 may also be three. The chip structure or the two-piece structure, the arc shape of the three-piece expansion plate 62 and the two-piece expansion plate 62 can be approximated by the annular ring 72 and can be subjected to the first jacket. 74 and the second jacket 80 are relatively moved to push the plurality of expansion plates 62 to expand outwardly against the inner wall surface 58 of the through hole 57 of the seat tube 54 or to the middle hole 179 of the extension tube 171 of another embodiment. The inner wall 191 of the tube is a combination of variations that can be understood by those skilled in the art.

The present invention disclosed in the specification is to be considered as illustrative and not restrictive. The scope of the present invention is defined by the scope of the appended claims, and is not intended to be limited by the scope of the invention.

10‧‧‧Folding bicycle 11‧‧‧Frame 12‧‧‧Main frame 14‧‧‧ head tube 15‧‧‧ First twister 16‧‧‧ Middle tube 17‧‧‧ Second twister 18‧ ‧Handle tube 19‧‧‧Bundle 20‧‧‧ Fork 22‧‧‧Back fork 24‧‧‧ Front wheel 26‧‧‧ Rear wheel 28‧‧‧ Positioning frame 29‧‧‧Perforation 30‧‧‧ first Magnetics 32‧‧‧ Posts 34‧‧‧ Fixings 36‧‧‧ Magnets 38‧‧ Springs 40‧‧‧ Screws 42‧‧‧Gaps 44‧‧‧Second magnetic parts 46‧‧‧ Disks 48‧‧‧ screw 50‧‧ ‧ nut 52‧‧ ‧ gasket 54 ‧ ‧ seat tube 55 ‧ ‧ upper end 56 ‧ ‧ lower end 57 ‧ ‧ through hole 58 ‧ ‧ hole wall 59 ‧ ‧ Screw section 60‧‧‧ Middle wheel set 61‧‧‧Fixed parts 62‧‧‧Expanding plate 64‧‧‧Inside side 66‧‧‧Outer side 68‧‧‧ Groove 69‧‧‧First bevel 70‧‧‧ Second bevel 72‧‧‧elastic ring 74‧‧ First Jacket 76‧‧‧ Through Hole 78‧‧‧ Cone 80‧‧‧Second Jacket 82‧‧‧ Screw Hole 84‧‧‧ Cone 86‧‧‧ Screw 88‧‧‧ Bolt Hole 90‧ ‧ ‧ Bearings 92‧‧‧ Positioning parts 94‧‧ Wheels 95‧‧‧Top 96‧‧‧Fixed holes 98‧‧‧ Wheels 99‧‧‧Pivot 111‧‧‧Seat 113‧‧‧ Chair frame 115 ‧‧‧Extension 117‧‧‧ Turning section 131‧‧‧Flip device 133‧‧‧ Positioning seat 135‧‧‧Pivot rod 137‧‧‧Fixed hole 151‧‧‧Clock seat 153‧‧‧ Rod 171‧‧‧ Extension tube 173‧‧‧ First end 175‧‧‧ Second end 177‧‧‧ External thread 179‧‧‧Medium hole 191‧‧‧ Inside wall 193‧‧ Positioning nut 311‧‧ ‧Adjustment set

The first picture shows the overall appearance of the creation of the folding bicycle.

Fig. 2 is an exploded perspective view showing the first magnetic member of the front wheel portion of the creation.

Fig. 3 is an exploded perspective view showing the second magnetic member of the rear wheel portion of the creation.

Fig. 4 is an exploded perspective view showing the arrangement of the middle wheel assembly at the bottom end of the seat tube of the bicycle frame.

Fig. 5 is a sectional view taken along line 5-5 of Fig. 1 as a sectional view showing that the center wheel assembly is disposed at the bottom end of the seat tube.

Fig. 6 is a sectional view taken along line 6-6 of Fig. 5.

Fig. 7 is a schematic view showing that the circumference of the wheel of the middle wheel assembly is smaller than the inner diameter of the middle tube of the bicycle frame, so that the middle wheel assembly can be collected into the middle tube as the seat tube is adjusted.

Figure 8 is a side view of the creation folding bicycle folding handle and the main frame tube, the front wheel and the rear wheel are juxtaposed, and the seat tube is lowered to make the wheel of the middle wheel assembly and the parallel front and rear wheels abut against the ground.

Figure 9 is a top view showing the front and rear wheels juxtaposed, and the magnetic attraction of the first magnetic member and the second magnetic member.

Figure 10 shows the hook of the flipping device after the folding bike is folded, so that the seat can be rotated by 90 degrees, so that the user can hold the extension by hand, so that the folding bicycle can be easily moved. .

Figure 11 is a cross-sectional exploded view showing another tube form and an extension tube installed at the lower end of the tube, and the middle wheel assembly is disposed at the bottom end of the extension tube.

Figure 12 is a cross-sectional view showing another tube form and an extension tube installed at the lower end of the tube, and the middle wheel assembly is disposed at the bottom end of the extension tube.

All of the drawings are merely illustrative of the basic teachings of the present invention, and the extension of the number, position, relationship, and size of the components constituting the preferred embodiment will be explained in the drawings. Post-related changes are implemented in industry skills. In addition, the changes in the exact dimensions and size ratios associated with specific strengths, weights, strengths and similar requirements are also within the skill of the industry after reading and understanding the teachings of this creation.

In the different drawings, the same reference numerals are used to designate the same or similar elements. In addition, please refer to the text such as "first", "second", "before", "after", "upper", "medium", "lower" , "end", and the like, are merely for the convenience of the viewer in the reference figure and are only used to help describe the creation.

10‧‧‧Folding bicycle

11‧‧‧ frame

12‧‧‧Main frame tube

14‧‧‧ head tube

15‧‧‧First twister

16‧‧‧中管

17‧‧‧Second twister

18‧‧‧Hand tube

19‧‧‧Bundle pieces

20‧‧‧ Front fork

22‧‧‧ rear fork

24‧‧‧ front wheel

26‧‧‧ Rear wheel

28‧‧‧ Positioning frame

30‧‧‧First magnetic parts

36‧‧‧ Magnet

44‧‧‧Second magnetic parts

46‧‧‧Disk

54‧‧‧ seat tube

55‧‧‧Upper

56‧‧‧Bottom

60‧‧‧ middle wheel set

94‧‧·wheel seat

98‧‧‧ Wheels

111‧‧‧ seats

113‧‧‧ Chair frame

115‧‧‧Extension

117‧‧‧ turning section

131‧‧‧Flipping device

133‧‧‧ Positioning Block

135‧‧‧ pivot rod

151‧‧‧Clock seat

153‧‧‧ hook lever

311‧‧‧Adjustment set

Claims (6)

A folding bicycle comprising: a frame comprising a main frame tube extending in a front-rear direction, the main end of the main tube having a head tube and a middle tube extending perpendicularly to the front-rear direction, a front fork a first tube is disposed between the front fork and the handle tube, the front fork is provided with a front wheel, and the front end of the front fork is provided with a first magnetic attraction. The main frame tube is provided with a second deflector, the top edge of the middle tube is provided with a bundle of knots, the outer surface of the middle tube has a rear fork extending rearward in the front-rear direction, and the rear fork is pivotally provided with a rear wheel. a second magnetic member is disposed at a bottom end of the rear fork. When the front wheel and the rear wheel are longitudinally disposed on a horizontal floor, a height position of the first magnetic member and the second magnetic member in the longitudinal direction is Substantially equal, when the first deflector is fastened, the handle tube is fixed together with the front fork, and when the first deflector is released, the handle tube can be pivoted toward the ground when the second twister is fastened When the main frame tube is maintained in the front-rear direction, when the second folding device is loosened, the main frame tube The folding folding causes the front wheel to be juxtaposed on the rear wheel side, and the first magnetic member and the second magnetic member are magnetically positioned; a tube is inserted into the middle tube of the frame and received by the binding member The sleeve tube includes an upper end and a lower end spaced apart in the longitudinal direction, and a perforated through the upper end and the lower end to form a hole wall surface inside the seat tube, and when the bundle member is loosened, the seat is released a tube bundle so that the seat tube can move up and down in the longitudinal direction of the middle tube; a middle wheel set including a fixing member and a wheel seat coupled with the fixing member and a wheel pivoted on a lower side of the wheel housing, The fixing member is fixed on the hole wall surface of the lower end of the seat tube, and the wheel protrudes downwardly from the lower end of the seat tube, and the contour of the wheel seat and the wheel does not exceed the range covered by the longitudinal projection of the circumferential surface of the seat tube. When the beam is loosened and the height is adjusted upward for the seat tube, the wheel seat and the wheel may further receive the middle tube with the lower end of the seat tube; and a seat includes a seat frame, the seat frame is disposed on the The upper end of the seat tube; adjust the bundle when the bundle is tight When the seat tube moves down to the position of the wheel of the middle wheel set to the ground, the first deflector is released to make the handle tube turn toward the ground, and the second deflector is released to fold the main frame tube, so that the front wheel is turned toward The rear wheel side and the first magnetic member and the second magnetic member are magnetically positioned such that the front wheel and the rear wheel are juxtaposed in the same direction, so that after the frame is folded, three wheels are grounded. It is suitable for stable movement on the ground. The folding bicycle according to claim 1, wherein the seat comprises a seat frame having an extension extending rearward in the front-rear direction, the end of the extension forming a turning portion extending in the longitudinal direction Between the chair frame and the upper end of the seat tube, there is a turning device, the turning device includes a positioning seat and a snap seat pivotally mounted on the positioning seat, the seat frame of the seat is disposed on the engaging seat The positioning seat is fixed to the upper end of the seat tube, and the engaging seat has a hook lever for holding the positioning seat. When the hook lever is pushed upward, the hook lever is disengaged from the positioning seat. The buckle seat and the seat can be turned up 90 degrees, so that the extension frame is turned to the longitudinal direction and the turning portion is turned to the front and rear direction, so that the user can hold the extension frame by hand and push the folded frame. Move freely. The folding bicycle of claim 1, wherein the fixing component of the middle wheel set comprises a first jacket, a second jacket, and the first jacket is threaded and the second jacket is screwed a screw, the surface of the screw is formed with an external thread, the screw has an inner screw hole extending in the longitudinal direction, and the plurality of expansion plates are sandwiched by the first jacket and the second jacket, and the expansion plates are formed to extend in the longitudinal direction. In the shape of an arc, each of the expansion plates has a spaced outer surface and a concave surface, and the outer surface of each of the expansion plates has a groove, and the two sides of each of the expansion plates are adjacent to each other, and the concave portion is bundled with an elastic ring. a groove, such that the plurality of expanded plate bundles are formed as a cylinder having an outer diameter smaller than an inner diameter of the through hole of the seat tube, and each of the expanded plates has a first inclined surface and a second inclined surface spaced apart in the longitudinal direction, each The first inclined surface and each of the second inclined surfaces extend obliquely from the adjacent outer side end toward the inner concave surface, the first jacket has a through hole extending in the longitudinal direction, the first jacket has a tapered portion, and the tapered portion abuts each expansion a first bevel of the plate, the second jacket having a screw hole extending in a longitudinal direction, the The two jackets have a tapered portion that abuts against the second inclined surface of each of the expansion plates, and the screw holes of the second jacket are longitudinally aligned with the through holes of the first jacket, and the screw is longitudinally disposed with a bearing And penetrating into the through hole of the first jacket, and the screw is screwed into the screw hole of the second jacket, the fixing member is placed into the through hole by the lower end of the seat tube, and when the screw rotates, the second jacket faces the second When a jacket is displaced, the tapered portion of the first jacket slides on the first inclined surface to open one end of each of the expansion plates, and the tapered portion of the second jacket slides on the second inclined surface to open the other end of each expansion plate, thereby The outer side surface of each of the expansion plates is pressed against the wall surface of the seat tube, so that the fixing member is fixedly positioned on the surface, and a positioning member penetrates the wheel base and the screw hole of the screw in the longitudinal direction, so that the wheel The seat is coupled to the underside of the fixture. A folding bicycle comprising: a frame comprising a main frame tube extending in a front-rear direction, the main end of the main tube having a head tube and a middle tube extending perpendicularly to the front-rear direction, a front fork a first tube is disposed between the front fork and the handle tube, the front fork is provided with a front wheel, and the front end of the front fork is provided with a first magnetic attraction. The main frame tube is provided with a second deflector, the top edge of the middle tube is provided with a bundle of knots, the outer surface of the middle tube has a rear fork extending rearward in the front-rear direction, and the rear fork is pivotally provided with a rear wheel. a second magnetic member is disposed at a bottom end of the rear fork. When the front wheel and the rear wheel are longitudinally disposed on a horizontal floor, a height position of the first magnetic member and the second magnetic member in the longitudinal direction is Substantially equal, when the first deflector is fastened, the handle tube is fixed together with the front fork, and when the first deflector is released, the handle tube can be pivoted toward the ground when the second twister is fastened When the main frame tube is maintained in the front-rear direction, when the second folding device is loosened, the main frame tube The folding folding causes the front wheel to be juxtaposed on the rear wheel side, and the first magnetic member and the second magnetic member are magnetically positioned; a tube is inserted into the middle tube of the frame and received by the binding member The sleeve tube includes an upper end and a lower end spaced apart from each other in the longitudinal direction, and a through hole is formed through the upper end and the lower end to form a hole wall surface inside the seat tube, and the hole wall mask at the lower end of the seat tube has a hole a threaded section, when the beam is loosened, the beam is released from the seat tube, so that the seat tube can move up and down in the longitudinal direction of the tube; an extension tube is screwed into the inner thread of the seat tube, the extension The tube has a first end and a second end spaced apart in the longitudinal direction, the outer surface of the extension tube has an external thread extending along the first end to the second end, a middle hole penetrating the first end and the second end Forming a tube inner wall in the extension tube, the extension tube is screwed with the external thread of the first end to the internal thread segment of the seat tube, and a positioning nut is screwed on the external thread of the extension tube, the positioning screw The contour of the cap does not exceed the range covered by the longitudinal projection of the seat tube When the positioning nut is rotated at the external thread against the lower end of the seat tube, the extension tube screwed into the seat tube is positioned by the positioning nut, when the positioning nut is not at the external thread When the lower end of the seat tube is abutted, the extension tube can be rotated up and down to adjust the length of the extension tube protruding from the lower end of the seat tube; a middle wheel set includes a fixing member and a wheel seat coupled with the fixing member and a wheel pivotally disposed on a lower side of the wheel base, the fixing member being fixed to the inner wall of the pipe at the second end of the extension pipe, the wheel protruding from the second end of the extension pipe, the wheel seat and the contour range of the wheel The range covered by the longitudinal projection of the seat tube is not exceeded, and when the beam is loosened and the height is adjusted upward for the seat tube, the extension tube, the wheel base and the wheel may further follow the lower end of the seat tube Revenue in the middle tube; and a seat, including a chair frame, the chair frame is disposed at an upper end of the seat tube; when the beam is loosened, the seat tube is adjusted to move downward to the wheel of the middle wheel set to the ground Release the first deflector to turn the handle tube toward the ground Folding and releasing the second folding device to fold the main frame tube, so that the front wheel is opposite to the rear wheel side and the first magnetic member and the second magnetic member are magnetically positioned, so that the front wheel and the rear wheel are The same orientations are juxtaposed together, so that after the frame is folded, there are three wheels on the ground suitable for pushing on the ground. The folding bicycle according to claim 4, wherein the seat comprises a seat frame, the end of the frame has an extension extending rearward in the front-rear direction, and the end of the extension forms a turning portion extending in the longitudinal direction. Between the chair frame and the upper end of the seat tube, there is a turning device, the turning device includes a positioning seat and a snap seat pivotally mounted on the positioning seat, the seat frame of the seat is disposed on the engaging seat The positioning seat is fixed to the upper end of the seat tube, and the engaging seat has a hook lever for holding the positioning seat. When the hook lever is pushed upward, the hook lever is disengaged from the positioning seat. The buckle seat and the seat can be turned up 90 degrees, so that the extension frame is turned to the longitudinal direction and the turning portion is turned to the front and rear direction, so that the user can hold the extension frame by hand and push the folded frame. Move freely. The folding bicycle according to claim 4, wherein the fixing member of the middle wheel set comprises a first jacket, a second jacket, and the first jacket is threaded and the second jacket is screwed a screw, the surface of the screw is formed with an external thread, the screw has an inner screw hole extending in the longitudinal direction, and the plurality of expansion plates are sandwiched by the first jacket and the second jacket, and the expansion plates are formed to extend in the longitudinal direction. In the shape of an arc, each of the expansion plates has a spaced outer surface and a concave surface, and the outer surface of each of the expansion plates has a groove, and the two sides of each of the expansion plates are adjacent to each other, and the concave portion is bundled with an elastic ring. a groove, and thus the plurality of expanded sheets are formed in a cylindrical shape, the outer diameter of the cylinder being smaller than the inner diameter of the middle hole of the extension tube, and the two ends of each of the expansion plates have a first inclined surface and a second inclined surface spaced apart in the longitudinal direction, respectively The first inclined surface and each of the second inclined surfaces extend obliquely from the adjacent outer side end toward the inner concave surface, the first jacket has a through hole extending in the longitudinal direction, the first jacket has a tapered portion, and the tapered portion abuts each expansion a first bevel of the plate, the second jacket having a screw hole extending in a longitudinal direction, the The two jackets have a tapered portion that abuts against the second inclined surface of each of the expansion plates, and the screw holes of the second jacket are longitudinally aligned with the through holes of the first jacket, and the screw is longitudinally disposed with a bearing And a through hole penetrating the first jacket, and the screw is screwed into the screw hole of the second jacket, the fixing member is inserted into the middle hole by the second end of the extension tube, and the second clamp is driven by the rotation of the screw When the sleeve is displaced toward the first jacket, the tapered portion of the first jacket slides on the first slope to open one end of each of the expansion plates, and the tapered portion of the second jacket slides on the second slope to open the expansion plates One end, and thus the outer side of each of the expansion plates is pressed against the inner wall of the tube of the extension tube, so that the fixing member is fixed in the extension tube, and a positioning member penetrates the wheel seat in the longitudinal direction and the screw hole is screwed into the screw Therefore, the wheel base is coupled to the underside of the fixing member.