KR200475512Y1 - Tandem bicycle - Google Patents

Abstract

The present invention relates to a bicycle comprising a pair of driving sprockets and a driven sprocket, and the bicycle is arranged in a specific structure so that the driving and driven sprockets corresponding to each other are arranged at a predetermined slope, Length bicycle that can be reduced in length.
To this end, the bicycle according to the present invention is characterized in that the front and rear wheels are connected to each other via a main frame, and a handle is installed on the front end side, the central portion and the rear end side of the main frame, And a rear saddle mounting bar on which a rear saddle is mounted is formed in a vertical direction, the bicycle comprising: A seat tube is formed between the front saddle-setting bar and the rear saddle-setting bar so as to be parallel to each other; The first driven sprocket is disposed at the lower end of the front saddle mounting bar, the first driven / second driven sprocket is disposed at the upper portion of the seat tube, the second driven sprocket is disposed at the lower end of the rear saddle mounting bar, The first chain and the second chain are installed in a state in which the follower / second drive sprocket is disposed at a higher position than the first drive sprocket and the second follower sprocket and is arranged in a mutually triangular shape.

Description

      {TANDEM BICYCLE}

      More particularly, the present invention relates to a bicycle having a structure in which a plurality of drive sprockets and a driven sprocket are arranged in a specific structure so that the length of the bicycle can be increased to a length similar to that of a general bicycle, This is about the bicycle.

      As is well known, the bicycle is provided with a drive sprocket having a large diameter on the crankshaft, a follower sprocket having a diameter smaller than that of the drive sprocket on the rotation shaft of the rear wheel, and the drive sprocket and the driven sprocket As shown in FIG.

      In addition, the crankshaft may be rotatably mounted on both ends of the crankshaft so that the pedals are mutually 180 ° apart from each other in a state where one ends of the pair of crankshafts are fixedly coupled.

      On the other hand, recently, the use of Lee In-seong bicycle, which is able to travel with two people at the same time, is increasing in order to enjoy the leisure activity more interestingly in amusement park, amusement park,

      As shown in FIGS. 1 and 2, the conventional double-breasted bicycle is configured such that the distance between the front wheel 1 and the rear wheel 2 is long, The second drive sprocket 5 in which the pedal 6 of the rear occupant is installed and the driven sprocket 7 provided in the rotary shaft of the rear wheel 2 are arranged to be substantially horizontal The overall length of the bicycle is much longer than that of a single-person bicycle.

      As a result, conventional bicycle bicycles can not be mounted on an elevator or the like, and thus it is impossible to carry and store bicycles in an apartment house or a general household. In addition, even if the bicycle is implemented as a folding bicycle, An impossible problem has also arisen.

Korean Patent No. 10-1166511

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a driving bicycle comprising a pair of driving sprockets and a driven sprocket, the driving and driven sprockets corresponding to each other, And the length of the bicycle can be reduced to a length similar to that of a conventional bicycle.

     According to an aspect of the present invention, there is provided a two-wheeled bicycle comprising a front wheel and a rear wheel connected to each other via a main frame, a front end side and a central portion and a rear end side of the main frame, A front saddle mounting bar on which a front saddle is mounted and a rear saddle mounting bar on which a rear saddle is mounted are formed in a vertical direction, A seat tube is formed between the front saddle-setting bar and the rear saddle-setting bar so as to be parallel to each other; The first driven sprocket is disposed at the lower end of the front saddle mounting bar, the first driven / second driven sprocket is disposed at the upper portion of the seat tube, the second driven sprocket is disposed at the lower end of the rear saddle mounting bar, And a first chain and a second chain are installed in a state in which the follower / second drive sprocket is located at a position higher than the first drive sprocket and the second follower sprocket and form a mutually triangular shape .

      Preferably, a first chain connecting the first drive sprocket and the first driven sprocket, and a second chain connecting the second drive sprocket and the second driven sprocket are installed to have a slope of 30 ° to 60 °, respectively .

      More preferably, the first drive sprocket, the first driven sprocket, and the first chain are installed on one side of the main frame, and the second drive sprocket, the second driven sprocket and the second chain are installed on the other side of the main frame .

      In addition, it is preferable that the bottom bracket is integrally formed at a predetermined position of the seat tube, and the first driven / second driven sprocket is installed on the second crank shaft penetrating the bottom bracket.

According to the present invention as described above, since the chain is installed so as to have a predetermined inclination after locating the driven and driven sprockets positioned at the center in the bicycle including the pair of drive sprockets and driven sprockets, The length of the bicycle can be greatly reduced to a length comparable to that of an ordinary bicycle.

As a result, it is possible to easily mount the bicycle in the elevator, thereby greatly improving the convenience in transportation and storage. In addition, when the bicycle is constructed of a folding bicycle, the bicycle can be easily mounted on the trunk of the vehicle .

In addition, the bicycle can be easily rotated when the bicycle is traveling through a shorter length than the conventional bicycle, thereby enhancing the safety and convenience of the passenger.

1 is a side view showing the appearance of a conventional bicycle,
FIG. 2 is a side view showing a configuration of a driving means of a conventional double-
3 is a perspective view showing the outer appearance of a bicycle according to the present invention,
FIG. 4 is a side view showing the outer appearance of a double-
Fig. 5 is a perspective view showing a configuration of a driving means of a double-
6 is a side view showing the configuration of a driving means of a double-breasted bicycle according to the present invention.

Hereinafter, the present invention constructed as described above will be described in detail with reference to the accompanying drawings.

FIG. 3 is a perspective view showing the appearance of a bicycle according to the present invention, FIG. 4 is a side view showing the appearance of bicycle with bicycle according to the present invention, and FIG. 5 is a perspective view showing the configuration of a driving means of bicycle 6 is a side view showing a configuration of a driving means of the double-breasted bicycle according to the present invention.

First, the bicycle according to the present invention includes a pair of drive sprockets and a driven sprocket provided on a bicycle, a pair of chains having a certain inclination after arranging them in a specific structure, and a bicycle So that the length of the optical fiber can be greatly reduced.

      The front wheel 10 and the rear wheel 20 of the bicycle according to the present invention are configured such that the front wheel 10 and the rear wheel 20 are arranged on the same line, and the front wheel 10 and the rear wheel 20 have a bar- A handlebar 40 is mounted on the front end of the main frame 30 and a front saddle mounting bar 44 is mounted on an intermediate portion of the main frame 30, And a rear saddle setting bar 48 is formed in a substantially vertical state on the rear end side.

      A handle 42 for adjusting the direction of the bicycle is provided on the upper end of the handlebar 40. Two persons are seated on the upper end of the front saddle-setting bar 44 and the upper side of the rear saddle- The front saddle 46 and the rear saddle 49 are installed and configured so as to be able to perform the operation.

      At this time, the handle 42, the front saddle 46 and the rear saddle 49 are configured to be adjustable in height according to the physique of the occupant, and the back saddle 49 is provided with a backrest Respectively.

      Reference numeral 32 denotes an upper frame 32 provided on the upper side of the main frame 30 in a state where the handlebars 40 are connected to the front saddle-setting bar 44 and the rear saddle- And reference numeral 34 denotes a reinforcing member whose both ends are connected to the main frame 30 and the front saddle-setting bar 44 to serve as a reinforcing member.

      A seat tube 50 having a substantially bar shape is provided between the front saddle-setting bar 44 and the rear saddle-setting bar 48 to guide the front saddle-setting bar 44 and the rear saddle- The upper and lower ends of the seat tube 50 are in contact with the upper frame 32 and the main frame 30, respectively.

      A first crank shaft 60 is provided at the lower end of the front saddle mounting bar 44 in contact with the main frame 30 and a bottom bracket 52 is provided at a point having a predetermined height of the seat tube 50. [ A second crankshaft 70 is provided via the bottom brackets 52 and the pair of crank arms 68 and 78 and the pedals 69 and 69 are connected to the crankshafts 60 and 70 through the crankshafts 60 and 70, 79 are installed.

      The first drive sprocket 62 is installed on the first crankshaft 60 at the lower end of the front saddle mounting bar 44 and the first driven sprocket 64 and the second drive sprocket 72 are disposed on the second crankshaft 60. [ And the second driven sprocket 74 is installed on the rotary shaft of the rear wheel 20 on the lower end side of the rear saddle mounting bar 48. [

      The first driven sprocket 64 and the second driven sprocket 72 are installed on the bottom brackets 52 provided on the seat tube 50 so that the first and second drive sprockets 62, And is positioned at a position higher than the driven sprocket 74 and is arranged to form a mutually triangular shape.

      A first chain 66 is connected through the first drive sprocket 62 and the first driven sprocket 64 and a second chain 66 is connected through the second drive sprocket 72 and the second driven sprocket 74. [ The chain (76) is connected, and the first and second chains (66, 76) are installed to have a slope of about 30 to 60 degrees, respectively.

      As described above, by arranging the plurality of sprockets in a substantially triangular shape and installing the first and second chains 66 and 76 having a predetermined inclination, the length of the bicycle for a bicycle can be greatly reduced to have a length similar to that of a general bicycle So that it can be designed.

      At this time, the first drive sprocket 62, the first driven sprocket 64 and the first chain 66 are installed on one side of the main frame 30, and the second drive sprocket 72 and the second driven sprocket The sprocket 74 and the second chain 76 are provided on the other side of the main frame 30.

      As is well known, the pedals 69 and 79, which are provided on the side of the first drive sprocket 62 and the second drive sprocket 72, respectively, are rotated 180 degrees with respect to each other through the crank arms 68 and 69 So that two passengers respectively aboard the front saddle 46 and the rear saddle 49 operate the pedals 69 and 79 so that the two pedals 69 and 79 are operated on the side of the rear wheel 20 .

Reference numeral 80 denotes a derailleur for gear shifting of a bicycle, which is a well-known technique in the related art, and therefore a detailed description thereof will be omitted.

It should be noted that the bicycle according to the present invention may be implemented as a folding bicycle by simply changing the positions and shapes of the main frame 30 and the upper frame 32.

Next, the operation of the present invention as described above will be described in detail with reference to the drawings.

      First, according to the present invention, in the structure of the driving means provided in the bicycle for the human being, the first driving sprocket 62 is provided at the lower end of the front saddle-setting bar 44 with the first driven / 72 are provided on the upper portion of the seat tube 50 and the second driven sprocket 74 is provided on the lower end of the rear saddle mounting bar 48 so that the first and second driven sprockets 64, 72 are arranged at positions higher than the first drive sprocket 62 and the second driven sprocket 74 so as to form a mutually triangular shape, the length of the bicycle can be made to be similar to that of a general bicycle .

      When the pedals 69 and 79 provided under the respective passengers are operated to rotate in the state that the occupant is on the front saddle 46 and the rear saddle 49 of the bicycle constructed as described above, The power according to the operation of the pedal 69 of the occupant aboard the crankshaft 46 is transmitted through the first drive sprocket 62 provided on the first crankshaft 60 and the first chain 66 and the first driven sprocket 64 The power transmitted to the second crankshaft 70 by the operation of the pedal 79 of the occupant aboard the rear saddle 49 is transmitted to the front saddle 46 transmitted to the second crankshaft 70, Is transmitted to the rotary shaft of the rear wheel (20) through the second drive sprocket (72), the second chain (76) and the second driven sprocket (74) together with the power from the occupant, The vehicle can be driven.

      In this case, the bicycle according to the present invention is configured to have a length similar to that of a general bicycle through a drive means having a specific structure, so that it is possible to rotate more easily even when the bicycle is traveling while the bicycle is on the bicycle. The safety of the passenger can be ensured.

In addition, when the bicycle is transported or stored, the bicycle can be easily carried in the elevator and can be conveniently transported or efficiently stored in a certain place.

While the present invention has been described in connection with certain exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

10: front wheel, 20: rear wheel,
30: main frame, 32: upper frame,
34: reinforcement member, 40: handle bar,
42: handle, 44: front saddle mounting bar,
46: front saddle, 48: rear saddle mounting bar,
49: rear saddle, 50: seat tube,
52: bottom bracket, 60: first crankshaft,
62: first drive sprocket, 64: first driven sprocket,
66: first chain, 68, 78: crank arm,
69, 69: pedal, 70: second crankshaft,
72: second drive sprocket, 74: second driven sprocket,
76: second chain, 80: the derailleur.

Claims (4)

A front saddle mounting bar in which a front saddle is installed and a rear saddle mounted thereon; and a rear saddle mounted on the rear saddle, wherein the front and rear wheels are connected to each other via a main frame, And a rear saddle mounting bar formed in a vertical direction;
A seat tube is formed between the front saddle-setting bar and the rear saddle-setting bar so as to be parallel to each other;
The first driven sprocket is provided at the lower end of the front saddle mounting bar, the first driven sprocket and the second driven sprocket are provided at the upper portion of the seat tube, the second driven sprocket is provided at the lower end of the rear saddle mounting bar, And a first chain and a second chain are installed in a state where the first driven sprocket and the second driven sprocket are disposed at positions higher than the first driven sprocket and the second driven sprocket and are arranged in a mutually triangular shape This bicycle is made by. The method according to claim 1,
A first chain for connecting the first drive sprocket and the first driven sprocket and a second chain for connecting the second drive sprocket and the second driven sprocket are respectively installed to have a slope of 30 to 60 from the horizontal plane This bicycle is a feature. 3. The method according to claim 1 or 2,
The first drive sprocket, the first driven sprocket and the first chain are installed on one side of the main frame, and the second drive sprocket, the second driven sprocket and the second chain are installed on the other side of the main frame This bicycle is made by. The method according to claim 1,
Wherein the bottom bracket is integrally formed at a predetermined position of the seat tube and the first driven sprocket and the second driving sprocket are installed on a second crank shaft penetrating through the bottom bracket.

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