TWM521035U - Bicycle frame structure featuring both extensibility and foldability - Google Patents

Description

Bicycle frame structure capable of both telescopic and folding (2)

The present invention relates to a bicycle frame, in particular to a bicycle frame structure which can be both telescopic and folded, which can be folded and adjusted in size, has a reduced volume, is convenient to carry, and is suitable for users of different sizes such as adults or children. The advantages.

Under the concept of promoting health and environmental protection, cycling has become one of the most popular sports for modern people. Under this ethos, bicycle-related industries are also booming. Due to the improvement of the material living standards of modern society, the function of bicycles is no longer based on transportation. In order to better meet the needs of modern consumers and strive for market share, bicycle manufacturers are constantly improving the design of bicycles, depending on the type of bicycles used. Can be divided into two categories of sports and leisure.

In addition to riding bicycles for sports purposes, many modern people living in the city have switched to bicycles as a daily means of transportation, on the other hand, due to the universal setting of bicycle-specific roads and the two-week holiday. In practice, many people also carry bicycles as one of the leisure tools when driving to the outside world; therefore, in order to be able to carry and store bicycles more conveniently, the manufacturer has proposed a foldable bicycle so that the user can easily and conveniently Carry and store bicycles.

The Taiwan invention patent "Foldable Bicycle" of the No. 453962, which discloses a foldable bicycle comprising a front skeleton and a rear skeleton, the front and rear skeletons being in a non-overlapping manner Bonded together, except in the seat branch In addition to the folding and tying points on or near the side, the orientation of the front and rear skeletons is designed such that the dashed line between them can protrude forward or backward without touching any of the skeletons except the front and rear skeletons. Being articulated and secured together allows the bicycle to be in a riding state.

Although the aforementioned announced foldable bicycle can be folded together, the distance between the front axle and the rear axle cannot be adjusted. In other words, the aforementioned foldable bicycle can be reduced in size by folding to achieve convenient carrying, but The size of the bicycle cannot be arbitrarily adjusted to suit users of different sizes.

The purpose of the present invention is to solve the above problems of the conventional bicycle, and to provide a bicycle that can be rotated and folded to reduce the volume and at the same time adjust the size of the bicycle for users of different bodies such as adults or children to ride and retract the bicycle. Frame structure (2).

In order to achieve the above object, an embodiment of the bicycle frame structure (2) capable of both telescopic and folding includes: a front frame and a rear frame, wherein the front frame includes a first frame portion, and a front frame a second frame portion and a holder, the first frame portion and the second frame portion are combined in a relatively slidable relationship, so that the front frame can be extended and shortened to adjust the frame length; the rear frame includes a rear upper fork, a rear lower fork and a riser, wherein the rear end of the rear upper fork and the rear end of the rear lower fork are connected to each other for assembly of the rear wheel set, and the front end of the rear upper fork is first The connector is detachably connected to the position of the riser near the upper end, and the front end of the lower fork is rotatably connected to the position of the riser near the lower end, so that the rear frame can be rotated from a use position to a folded position.

In an embodiment of the present invention, a bicycle frame structure (2) capable of both telescopic and folding, wherein the second frame portion is a hollow pipe body, and the first frame portion is along the second frame portion. A pipe member that slides in the axial direction of the pipe body.

In an embodiment of the bicycle frame structure (2) which can be both telescopic and folded, the first connector is a quick release structure.

In an embodiment of the bicycle frame structure (2) which can be both telescopic and folded, an embodiment of the holder is a quick release structure, and the holder passes through the first frame portion and the second frame portion. In the cross section, the retainer can tighten the side wall of the first frame portion toward the second frame portion for tightly clamping the first frame portion and the second frame portion together.

Therefore, it can be understood from the above technical content that the bicycle frame structure which can be both telescopic and folded can be easily folded and resized, has a reduced volume, is convenient to carry, and is suitable for users of different sizes to ride. The advantages.

The specific embodiments and other advantages and effects of the present invention will be described below in conjunction with the drawings.

A‧‧‧ front frame

B‧‧‧ rear frame

W2‧‧‧ rear wheel set

10‧‧‧First connector

21‧‧‧First lever

211‧‧‧End

22‧‧‧First cam lever

221‧‧‧First Cam

222‧‧‧first pole

23‧‧‧ pivoting seat

24‧‧‧ pivoting ears

241‧‧ ‧ gap

25‧‧‧ first nut

30‧‧‧First Frame Department

31‧‧‧Long and narrow perforations

32‧‧‧ head tube

33‧‧‧ front fork

34‧‧‧Handle tube

40‧‧‧Second Frame Department

50‧‧‧fixer

51‧‧‧Third rod

52‧‧‧third cam lever

511‧‧‧ third nut

521‧‧‧ Third Cam

60A‧‧‧After fork

60B‧‧‧ rear fork

70‧‧‧Riser

72‧‧‧ seat tube

73‧‧‧Strengthened rod

74‧‧‧ Large toothed seat

80‧‧‧Second connector

81‧‧‧ shaft seat

82‧‧‧ shaft

83‧‧‧ bushings

90‧‧‧Connector

91‧‧‧First wing

The first gap of 911‧‧

912‧‧‧Rotary axis

92‧‧‧second wing

921‧‧‧ second gap

93‧‧‧ pivot

94‧‧‧Second drawbar

941‧‧‧ bolt

95‧‧‧Second cam lever

951‧‧‧second cam

952‧‧‧second lever

Fig. 1 is a structural view showing an embodiment of a bicycle frame structure (2) which can be both telescopic and folded, and shows a case where the first frame slides to the first position.

Fig. 2 is a structural view showing an embodiment of a bicycle frame structure (2) capable of both telescopic and folding, showing a case where the first frame slides to the second position.

Fig. 3A is a sectional structural view of the first figure at the position III-III, showing the state in which the holder is in the pressing position.

FIG. 3B is another schematic diagram of the operation of FIG. 3A, showing the state in which the holder is in the release position.

Fig. 4 is a partial structural view of the bicycle frame structure (2) which can be both telescopic and folded, and shows the structure of the second connector.

Figure 5A is a partial structural view of the first figure at the V-V position, showing the first connector in the locked position.

FIG. 5B is another schematic diagram of the operation of FIG. 5A, showing the first connector in the unlocked position.

Fig. 6 is a schematic view showing the use of an embodiment of the present invention, showing the situation in which the rear frame is folded and folded.

Figure 7A is a configuration diagram of an embodiment of the pivotal connector showing the state of the pivotal connector in the locked position.

Figure 7B is a structural view of an embodiment of the pivotal connector showing the pivotal position of the pivotal connector.

First, please refer to FIG. 1 , which is a structural view of an embodiment of a bicycle frame structure of the present bicycle. The frame structure of the disclosed bicycle includes a front frame A and a rear frame B.

In an embodiment of the present invention, the rear frame B includes: a rear upper fork 60A, a rear lower fork 60B, and a riser 70; wherein the riser 70 is used to support a tube 72, and in the riser 70 A large toothed disc holder 74 is fixed near the bottom end for assembling the bottom bracket, the large toothed disc and the crank set of the bicycle, wherein the lower ends of the rear upper fork 60A and the rear lower fork 60B are connected to each other. For the rear wheel set W2, the front end of the rear upper fork 60A is connected to the upper end of the riser 70 by a first connector 10, and the front end of the rear lower fork 60B is rotatably supported by a second connector 80. Connected to the position where the riser 70 is near the lower end, the riser 70, the rear upper fork 60A, and the rear lower fork 60B constitute a triangular structure.

Referring to FIG. 4, an embodiment of the second connector 80 includes a shaft seat 81, a rotating shaft 82 and a sleeve 83. The shaft seat 81 is fixedly disposed at a position near the lower end of the riser 70, and the sleeve 83 is fixedly disposed at The front fork 60B can be pivotally connected to the shaft base 81 by a rotating shaft 82 passing through the axis of the sleeve 83. In an embodiment shown in FIG. 4, The shaft seat 81 and the large toothed seat 74 are respectively located at symmetrical positions in the radial direction of the riser 70. In a preferred embodiment, the shaft seat 81 is positioned at the axis of the large spur base 74 and the axis of the rear wheel set W2. a point on the line, therefore, when the rear wheel set W2, the rear upper fork 60A and the rear lower fork 60B are rotated to a folding position with the second connector 80 as a center of rotation (see Fig. 6), it will not be because The bicycle's drive chain (not shown) is affected.

In an embodiment of the present invention, the first connector 10 is a quick release structure, and an embodiment of the quick release structure, such as FIGS. 5A and 5B, includes a first pull rod 21, a first cam lever 22, A pivoting seat 23 and a pivoting lug 24; wherein the pivoting seat 23 is fixedly disposed at a position near the upper end of the riser 70, the pivoting lug 24 is fixedly disposed at the front end of the rear upper fork 60A, and the pivoting lug 24 has a notch 241 The first pull rod 21 extends transversely through the pivoting seat 23, the tail end 211 of the first pull rod 21 extends through the notch 241, and a first nut that is rotatable is screwed to the tail end 211 of the first pull rod 21 25, the first nut 25 is located outside the pivoting lug 24, the front end of the first pull rod 21 passes through the notch 241 and extends to the other side of the pivoting lug 24, and the first cam lever 22 includes a first cam 221 and a connection In a first lever 222 of the first cam 221, an eccentric shaft of the first cam 221 is pivotally disposed at a front end of the first rod 21, as shown in FIG. 5A, when the first rod 21 is laterally pivoted in a loose fit manner. After the seat 23, the first nut 25 is first screwed to the tail end 211 of the first pull rod 21 and the first nut 25 is brought into contact with the pivoting lug 24 The outer surface of the first cam lever 22 is pivoted to the locking position shown in FIG. 5A, and the first cam 221 and the first nut 25 of the first cam lever 22 are pivotally connected. The ear 24 is pressed toward the pivoting seat 23, and the front end of the rear upper fork 60A is connected to the position of the riser 70 near the upper end; otherwise, when the frame of the bicycle is to be folded, the first cam lever 22 is first dialed. Moving to the unlocked position shown in FIG. 5B, the first cam 221 and the first nut 25 of the first cam lever 22 are not forced to the outer surface of the pivoting lug 24, and the second connector 80 is Rotating center rotation, upper fork 60A and rear The lower fork 60B, so that the front end and the tail end of the first pull rod 21 are withdrawn from the notch 241 of the pivoting lug 24, the rear wheel set W2, the rear upper fork 60A and the rear lower fork 60B can be rotated together to a folding position (see Figure 6).

In particular, the foregoing embodiment configurations of the first connector 10 and the second connector 80 are only one of many possible embodiment configurations, and are not intended to limit the implementation of the aforementioned first connector 10 and second connector 80. In a manner, for example, the first connector 10 can use the first pull rod 21 and the first cam lever 22 to connect the pivoting lug 24 to the pivoting seat 23 by using a combination of a bolt and a nut; therefore, familiar with the technology. Those having ordinary knowledge in the field should be able to easily convert to other equivalent structures after understanding the technical contents of the first connector 10 and the second connector 80, but such a simple transformation should still be regarded as Technical category.

Referring to FIG. 1 , in an embodiment of the present invention, the front frame A includes a first frame portion 30 , a second frame portion 40 and a holder 50 , and one end and the rear of the second frame portion 40 . The riser 70 of the frame B is connected, and the first frame portion 30 and the second frame portion 40 are combined in a relatively slidable relationship so that the first frame portion 30 can be aligned with respect to the second frame portion 40. The first position and the second position are slid, and the holder 50 can fix the first frame portion 30 and the second frame portion 40 in a relatively fixed fixed position and release from the fixed position. In an embodiment of the present invention, when the first frame portion 30 is slid to the first position, the distance between the first frame portion 30 and the second frame portion 40 is the closest, and the frame length of the bicycle is shortened to the shortest. Position (see Fig. 1). Conversely, when the first frame portion 30 is slid to the second position, the distance between the first frame portion 30 and the second frame portion 40 is the farthest, and the frame length of the bicycle can be Stretch to the longest position (see Figure 2). Therefore, users of different sizes can freely adjust the length of the bicycle frame to obtain a comfortable and better riding posture.

In an embodiment of the present invention, a front end of the first frame portion 30 is provided with a head tube 32, and the front fork 33 of the bicycle is rotatably pivoted to the head tube 32, and a top end of the front fork 33 is connected The handle 34 is attached to the handle tube 34. In a preferred embodiment, the handle tube 34 is coupled to the top end of the front fork 33 by a pivotal connector 90. The handle and handle tube 34 of the bicycle can be The pivoting device 90 is folded for the rotation point, further reducing the volume of the bicycle frame after folding or occupying space, and is also more convenient to carry and store.

Referring to FIG. 7A, an embodiment of the pivotal connector 90 is constructed; wherein the pivotal connector 90 includes a first wing 91 fixed to the top end of the front fork 33 and a second wing fixed to the bottom end of the handle tube 34. 92. One ends of the first wing 91 and the second wing 92 are rotatably pivoted together by a pivot shaft 93. Therefore, the handle and the handle tube 34 of the bicycle can be folded in one direction with the pivoting point of the pivotal connector 90. The collapsed state and expanded to a use state (see Figure 1). The pivotal connector 90 includes a quick release structure including a second pull rod 94 and a second cam lever 95 having a first end at the other end of the first flap 91 and the second flap 92, respectively. a notch 911 and a second notch 921, the opening of the first notch 911 extends to the edge of the first wing 91, the opening of the second notch 921 extends to the edge of the second wing 92, and the second tie rod 94 is loosely fitted The relationship is through the first notch 911 of the first wing 91 and the second notch 921 of the second wing 92. The tail end 941 of the second rod 94 passes out of the outer side of the first wing 91, and the tail end of the second rod 94 Rotatingly disposed on the outer side of the first wing 91, for example, a bolt 941 is disposed at the end of the second rod 94, and the bolt 941 is screwed to a rotating shaft 912 on the outer side of the first wing 91. The second rod 94 is slidably coupled to the outer side of the first wing 91. The front end of the first flap 91 is disposed, and the second cam lever 95 includes a second cam 951 and a second lever 952 connected to the second cam 951. The eccentric shaft of the second cam 951 is pivoted. The front end of the two tie rods 94, see Fig. 1, when the handle and the handle tube 34 of the bicycle are unfolded by the pivot 93 of the pivotal connector 90 to In a state, the first flap 91 and the second flap 92 can abut each other, and then the second cam lever 95 is toggled to the locking position shown in FIG. 7A, and the second cam lever 95 can be used. The second cam 951 urges the first wing 91 toward the second wing 92 to avoid the hinge 90 The first flap 91 and the second flap 92 are separated to maintain the handle of the bicycle and the handle tube 34 in the use state; otherwise, when the handle of the bicycle and the handle tube 34 are to be folded, the second cam is dialed first. The lever 95 is turned to the unlocked position shown in FIG. 7B, so that the second cam 951 of the second cam lever 95 is separated from the surface of the first flap 91, and then rotated by the tail end 941 of the second lever 94 as a center of rotation. The second cam lever 95 allows the second cam lever 95 to leave the first notch 911 of the first wing 91 and the second notch 921 of the second wing 92 to pivotally connect the handle of the bicycle and the handle tube 34 The pivot 93 of the 90 is folded in a folded state to a folded state.

In an embodiment of the present invention, the second frame portion 40 of the front frame A is a hollow tubular body, and the first frame portion 30 is slidable along the axial direction of the tubular body of the second frame portion 40. In one embodiment, the first frame portion 30 projects into the second frame portion 40 in a slidable relationship, and the front end of the first frame portion 30 has a head tube. One embodiment of the retainer 50 is a quick release configuration that may be similar to the quick release configuration of the pivotal connector 90 described above. Referring to FIGS. 1 and 3A, the first frame portion 30 has an elongated perforation 31, and the third tie rod 51 of the holder 50 passes through the cross section of the second frame portion 40 and the first frame portion. The front end of the third pull rod 51 passes through the outer side of the second frame portion 40, and a third cam lever 52 is pivotally disposed at the front end of the third pull rod 51, and the rear end of the third pull rod 51 passes through the second On the outer side of the frame portion 40, a third nut 511 that is rotatable is provided at the rear end of the third rod 51, and the user moves the bicycle through the first frame portion 30 and the second frame portion 40. After the frame length is adjusted to a suitable length, the third cam lever 52 is toggled to the pressing position (see FIG. 3A), and the third cam 521 of the third cam lever 52 abuts the second frame. The outer surface of the portion 40, while the third nut 511 that pulls the trailing end of the third pull rod 51 abuts against the other opposite outer surface of the second frame portion 40, the side wall of the second frame portion 40 can be directed toward the first vehicle. The direction of the frame portion 30 is tightened for the first frame portion 30 and the second frame portion 40 Tightly clamped together to maintain the length of the bicycle frame in the adjusted length; conversely, when the user of different body needs to re-adjust the length of the bicycle frame, the third cam lever 52 can be moved to The release position shown in FIG. 3B causes the third cam 521 and the third nut 511 of the third cam lever 52 to respectively move away from the outer surface of the second frame portion 40, so that the user can easily slide the first car again. The frame portion 30 and the second frame portion 40 adjust the length of the bicycle frame to a suitable length, and then re-fix the first frame portion 30 and the second frame portion 40 in a relatively fixed fixed position by using the holder 50. The length of the bicycle frame is maintained at the adjusted length.

As shown in FIG. 1, in a preferred embodiment, the second frame portion 40 includes a reinforcing rod 73. The bottom end of the reinforcing rod 73 is fixedly connected to the position of the riser 70 near the lower end, and the top end of the reinforcing rod 73 is fixedly connected. On the lower side of the second frame portion 40, a triangular structure is formed by the riser 70, the second frame portion 40, and the reinforcing rod 73, so that the front frame A can obtain better structural strength.

Although the present invention has been disclosed above by the above embodiments, it is not intended to limit the present invention, and any skilled person skilled in the art can make some modifications and retouchings without departing from the spirit and scope of the present invention. The scope of patent protection is subject to the terms of the claims attached to this specification.

A‧‧‧ front frame

B‧‧‧ rear frame

W2‧‧‧ rear wheel set

10‧‧‧First connector

30‧‧‧First Frame Department

32‧‧‧ head tube

33‧‧‧ front fork

34‧‧‧Handle tube

40‧‧‧Second Frame Department

50‧‧‧fixer

60A‧‧‧After fork

60B‧‧‧ rear fork

70‧‧‧Riser

72‧‧‧ seat tube

73‧‧‧Strengthened rod

74‧‧‧ Large toothed seat

80‧‧‧Second connector

90‧‧‧Connector

Claims (7)

A bicycle frame structure (2) capable of both telescopic and folding, comprising: a front frame and a rear frame, the front frame including a first frame portion, a second frame portion and a holder The first frame portion and the second frame portion are combined in a relatively slidable relationship such that the first frame portion can be in a first position and a second position relative to the second frame portion. Sliding, wherein the holder can fix the first frame portion and the second frame portion in a relatively fixed fixed position and release from the fixed position; the rear frame includes a rear upper fork and a rear lower fork And a riser, one end of the second frame portion is connected to the riser, wherein a rear end of the rear upper fork and a rear end of the rear lower fork are connected to each other for assembly of a rear wheel set, the rear fork The front end is removably coupled to the riser near the upper end by a first connector, and the front end of the rear fork is rotatably coupled to the position of the riser near the lower end. The bicycle frame structure (2) which can be both telescopic and folded as claimed in claim 1, wherein the second frame portion is a hollow pipe body, and the first frame portion is along the second frame A pipe member that slides in the axial direction of the pipe body. The bicycle frame structure (2) which can be both telescopic and folded as claimed in claim 1, wherein the holder is a quick release structure, and the holder passes through the first frame portion and the second frame portion. In a cross section, the holder can press the side wall of the first frame portion toward the second frame portion for tightly clamping the first frame portion and the second frame portion together. The bicycle frame structure (2) which can be both telescopic and folded as claimed in claim 3, wherein the first frame portion has an elongated perforation, and the holder comprises a third lever and a third cam lever The third pull rod of the fixture passes through a cross section of the second frame portion and the elongated through hole of the first frame portion, and a front end of the third pull rod passes through the second frame portion Outside, in the first The front end of the three tie rods is pivotally disposed with the third cam lever, the tail end of the third pull rod passes out of the outer side of the second frame portion, and a third nut that is rotatable is provided at the tail end of the third rod The third cam lever includes a third cam and a third cam lever connected to the third cam, and an eccentric shaft of the third cam is pivotally disposed at a front end of the third lever. The bicycle frame structure (2) which can be both telescopic and folded as claimed in claim 1, wherein the first connector comprises a first pull rod, a first cam lever, a pivot joint and a pivoting ear; The pivoting seat is fixedly disposed at a position near the upper end of the riser, the pivoting ear is fixedly disposed at a front end of the rear upper fork, and the first pull rod laterally penetrates the pivoting ear and the pivoting seat in a loose fit manner The first end of the first pull rod is screwed with a first nut that is rotatable. The first nut is located outside the pivoting lug, and the front end of the first rod passes through the other side of the pivoting lug. The first cam lever includes a first cam and a first lever connected to the first cam, and an eccentric shaft of the first cam is pivotally disposed at a front end of the first lever, the first cam lever can be dialed Moving to a locking position, the first cam and the first nut tightening the pivoting ear toward the pivoting seat, the first cam lever can be moved to an unlocking position, so that The first cam and the first nut do not tighten the pivoting ear. The bicycle frame structure (2) which can be both telescopic and folded as claimed in claim 1, wherein a position of the riser near the lower end is fixedly provided with a shaft seat, and a sleeve is fixedly disposed at a front end of the rear fork. The shaft is provided with a rotating shaft, and the sleeve is rotatably pivoted to the shaft seat by the rotating shaft. The bicycle frame structure (2), which can be both telescopic and folded, as claimed in claim 1, wherein the second frame portion includes a reinforcing rod, and the bottom end of the reinforcing rod is fixedly connected to the lower end of the riser. The top end of the reinforcing rod is fixedly coupled to the lower side of the second frame portion, and the riser, the second frame portion and the reinforcing rod form a triangular structure.