KR200265942Y1 - Bicycle having saddle elevating apparatus - Google Patents

Abstract

The present invention relates to a bicycle, and more particularly, by using the rotational force generated when the bicycle pedal is stepped up and down to move the saddle and saddle fixing pipe up and down so that the passenger sitting on the saddle feels like riding a horse and fun and exercise effect It relates to a bicycle equipped with a saddle lifting device that can promote at the same time.

Bicycle equipped with a saddle lift apparatus according to the present invention is a bicycle comprising a predetermined frame, a front wheel having a steering function, a rear wheel having a drive function and a power transmission means for driving the rear wheel, the pedal shaft of the bicycle An axial gear fixed to the; A rotary gear that meshes with the shaft gear to transmit rotational force; A slide plate formed with a guide groove connected to the inner surface of the rotary gear via a guide pin to convert the rotational movement into a vertical movement; It is characterized in that it comprises a slide rod fixed to the slide plate for vertically moving the saddle in which the occupant sits up and down.

Description

Bicycle with saddle elevating device {Bicycle having saddle elevating apparatus}

The present invention relates to a bicycle, and more particularly, by using the rotational force generated when the bicycle pedal is stepped up and down to move the saddle and the saddle fixed pipe up and down vertically so that the passenger sitting on the saddle feels like riding a horse. The present invention relates to a bicycle equipped with a saddle lift apparatus capable of simultaneously enhancing the effect.

In general, a bicycle is a two-wheeled vehicle that rotates the wheels by human force, which is one of the means of transporting the pedal to the rear wheel via the crank and the chain to move to a desired destination. These bicycles are equipped with a transmission that can change the speed ratio according to the driving conditions, so that it can run more easily and faster, and the function as a vehicle continues to develop.

In recent years, however, bicycles have not only functioned as transportation means but also as a kind of exercise means. In other words, as the means of transportation by the internal combustion engine is rapidly spreading, bicycles driven by manpower have tended to be used as exercise means for physical training rather than for transportation purposes. In particular, bicycles have a lot of oxygen consumption, which improves cardiopulmonary function and keeps them rhythmical, so they can continue their interests. It is said to be good for relieving stress by releasing tension in moderation.

As shown in FIG. 1, the bicycle 1 is equipped with a frame 3 and a handle 2 having a triangular structure and are provided with a front wheel 5 having a steering function, a rear wheel 7 having a driving function, and the rear wheel. (7) a power transmission means for driving the power transmission means, the pedal shaft 13 is provided in the center portion of the frame (3) and the large sprocket (15) provided on the pedal shaft 13 and the The chain is composed of a crank 12 and a pedal 11 installed on the pedal shaft 13 to drive the large sprocket 15 and transfers the rotating power generated in the pedal shaft 13 to the rear wheel 7. (17) and the like.

In this way, the conventional bicycle 1 is to transmit the rotational force generated in the pedal shaft 13 to the rear wheel 7 so that the rear wheel 7 is driven to efficiently achieve the function of the vehicle. However, such a conventional bicycle (1) has been insufficient to meet the function as an exercise equipment or amusement equipment. In other words, many bicycle enthusiasts use the bicycle as a kind of exercise rather than simply as a means of transportation, but the conventional bicycle is basically designed to move the maximum distance with minimum force, so it is more than necessary to obtain sufficient exercise effect. There was a problem that loses interest because it must travel long distance.

Therefore, the present invention adds a function as an exercise means and an entertainment means to a bicycle as a conventional means of transportation, so that it is possible to obtain a sufficient amount of exercise even when traveling relatively close and to make it feel like riding a horse. To induce.

The present invention has been made in consideration of the above-described points, and by rotating the rear wheel with the rotational force generated when the occupant presses the bicycle pedal, advancing the bicycle, and transmitting a part of the rotational force generated from the pedal shaft to the saddle lifting device, the saddle is moved up and down. It provides a bike that enhances the exercise effect by allowing the passenger to feel like riding a horse, thereby increasing the fun and by stepping on the pedal with greater force to move the saddle with the passenger's weight up and down. will be.

1 is a side view showing a typical bicycle,

Figure 2 is a side view showing a saddle lift apparatus is installed in accordance with the present invention,

Figure 3 is a side cross-sectional view for showing the structure of the saddle lifting apparatus according to the present invention,

Figure 4 is an exploded perspective view for showing the structure of the saddle lifting apparatus according to the present invention,

Figure 5 is a front cross-sectional view of the saddle lifting apparatus according to the present invention from the front wheel side,

Figure 6 is a partially cut perspective view showing an example of a device for selectively transmitting the vertical movement of the slide rod according to the present invention;

7 is a conceptual diagram for explaining the operation of the saddle lifting apparatus according to the present invention,

8 is a cross-sectional view showing an embodiment of the present invention in which the light emitting means is installed on the flywheel;

9 is a sectional front view showing another embodiment of the saddle lifting apparatus according to the present invention,

Figure 10 is a side cross-sectional view showing an embodiment in which the saddle elevating device according to the present invention is installed on the top of the pedal shaft,

Figure 11 is a perspective view showing a fitness bicycle with a saddle lifting apparatus according to the present invention.

* Explanation of symbols for the main parts of the drawings

1: bicycle 3: frame

10: saddle lifting device 11: pedal

13: pedal shaft 15: large sprocket

21: shaft gear 23: saddle fixed pipe

26: support frame 33: rotating gear

34: guide pin 35: slide plate

36: guide groove 38: guide rail

40: case 43, 44: support rib

47: support protrusion 54: face gear

56 flywheel 58 support plate

73: rotation axis 75: helical gear

77: fixing nut 90: small generator

97: LED 100: fitness bike

The above object is a bicycle comprising a predetermined frame, a front wheel having a steering function, a rear wheel having a driving function, and a power transmission means for driving the rear wheel, comprising: an axle gear fixed to a pedal shaft of the bicycle; A rotary gear that meshes with the shaft gear to transmit rotational force; A slide plate formed with a guide groove connected to the inner surface of the rotary gear via a guide pin to convert the rotational movement into a vertical movement; Fixed by the slide plate is achieved by a bicycle with a saddle lift device characterized in that it comprises a slide rod for vertically moving the saddle the occupant sits up and down.

In the present invention, the slide plate is a plate-like body having a width similar to the rotary gear, the front is formed with a guide groove into which the guide pin is inserted, the rear is fixed a slide rod for vertically moving the saddle, Each side is characterized in that the guide rails are formed to limit the movement in the left and right directions.

In addition, the guide groove is stepped to the upper end and the lower end, characterized in that a predetermined inclined portion is formed between the upper end and the lower end.

In addition, the present invention is spaced apart from the shaft gear and the face gear fixed to the bicycle pedal shaft; A helical gear disposed at right angles to the face gear to transmit rotational force; A hollow rotating shaft integrally formed with the helical gear and slidably penetrating the slide rod; Further characterized in that it further comprises a flywheel integrally coupled to the upper end of the rotating shaft.

And a small generator consisting of a stator and a rotor is installed on the upper end of the rotating shaft, characterized in that a plurality of LEDs electrically connected to the generator is installed in the body of the flywheel.

In addition, the present invention and the saddle fixing frame that is selectively in contact with the tip of the slide rod; A support frame through which the saddle fixing frame is slidably supported by the bicycle frame; A hook ring installed at the top of the saddle fixing frame to selectively pass the catching rod protruding from the upper portion of the slide rod; A guide channel formed at an upper end of the support frame to guide the locking rods; It is fixed to the lower end of the saddle fixing pipe is configured to include a stopper that the tip of the slide rod is in contact.

Hereinafter, with reference to the accompanying drawings will be described a preferred embodiment of the present invention. First, Figure 2 is a side view showing a bicycle with a saddle lifting device 10 according to the present invention, the bicycle 1 according to the present invention as shown in the figure is a separate saddle lifting device 10 to the pedal shaft (13) By installing the saddle (9) seated occupants to move up and down. That is, the saddle elevating device 10 converts the rotational force of the pedal shaft 13 into a vertical reciprocating motion to move the saddle fixing pipe 23 up and down so that the occupant feels riding while riding the bicycle. . At this time, the saddle elevating device 10 may be installed in the upper or lower portion of the pedal shaft 13, Figure 2 is an example of installing the saddle elevating device 10 according to the present invention in the lower portion of the pedal shaft (13) As shown, the bicycle lower frame 4 is integrally fixed to the fixing member 6 on the outer surface of the saddle elevating device 10. In addition, if necessary, an auxiliary frame 24 may be further installed between the upper frame 8 and the lower frame 4.

3 and 4 are side cross-sectional views and an exploded perspective view showing an example of the saddle elevating device 10 according to the present invention, the shaft gear 21 is fixed to the pedal shaft 13 the rotational force by the drive of the pedal shaft 13 ) Shows a motion switching device that converts rotational motion into vertical reciprocating motion by using a rotary gear as a prime mover and a home cam as a follower. That is, the shaft gear 21 installed on the pedal shaft 13 is engaged with the rotary gear 33 which is the driving body to transmit the rotational force, and the rotary gear 33 is a home cam through the guide pin 34 formed on one side. It is connected to the slide plate 35 to linearly reciprocate the slide plate 35 up and down. At this time, the slide plate 35 is formed with a slide groove 36 consisting of an upper end portion, an inclined portion and a lower end portion on the inner surface thereof, and a slide rod 63 contacting the lower end of the saddle fixing pipe 23 is fixed to the rear surface thereof. . In addition, guide rails 38 that restrict movement in the left and right directions of the slide plate 35 are integrally formed in the case 40 on the left and right side surfaces of the slide plate 35.

Meanwhile, the helical gear 75 is installed on the pedal shaft 13 so as to be spaced apart from the shaft gear 21, and the face gear 54 having a relatively large diameter is fixed to arrange the rotational force of the pedal shaft 13 at a right angle. To pass on. And the helical gear 75 is to rotate the rotating shaft 73 of the hollow formed integrally at the top. At this time, the pedal shaft 13 and the helical gear 75 of the face gear 54 disposed in a right angle direction do not cross each other, and the slide rod 63 is provided inside the hollow rotating shaft 73. And a flywheel 56 having a relatively large diameter is installed on the upper end of the rotary shaft 73, because the flywheel 56 accumulates the rotational force by its rotational inertia 13 Even when the) is not driven, the rotary gear 33 rotates to average the rotation speed.

Therefore, the flywheel 56 is composed of a cylindrical body 57 having a relatively large diameter and a support plate 58 formed integrally with the lower portion of the cylindrical body 57, and the weight body 59, if necessary, the body ( It is installed on the lower part of 57) to improve rotational inertia. And the fly wheel 56 is fastened by fixing the nut 77 to the upper end of the rotating shaft 73 protruding therethrough through the through hole of the support plate 58, and a bearing ( 78) and the metal plate 79 is installed to smooth the rotation. That is, by forming an annular spacer 45 having a predetermined height on the upper surface of the case 40 to maintain a predetermined distance between the flywheel 57 and the upper surface of the case 40 and the annular spacer ( 45) Inside the bearing 78 is to facilitate the rotation of the flywheel 56. On the other hand, reference numeral 6 is a fixing member which is installed on the outer surface of the case 40, the lower frame 4 of the bicycle is fixed by welding or the like method.

Next, the structure of the saddle elevating device 10 according to the present invention will be described in more detail with reference to the exploded perspective view of FIG. 4. The crank 12 and the large sprocket 15 are fixed to the pedal shaft 13. And the shaft gear 21 according to the present invention is installed on the opposite side to be spaced apart from the large sprocket (15).

The rotary gear 33 is rotatably installed around the central shaft 32 so as to be engaged with the shaft gear 21 at a lower portion of the shaft gear 21, and the central shaft 32 is a case. It is rotatably built up in 40. In addition, a guide pin 34 of a predetermined length protrudes from an inner surface edge of the rotary gear 33.

On the other hand, a guide groove 36 in which the guide pin 34 is guided is formed on a front surface of the slide plate 35 that is rectangular in shape and has a width similar to that of the rotary gear 33, and on the rear side thereof, a slide rod ( 63) is fixed integrally. Accordingly, when the guide pin 34 rotates together with the rotary gear 33, the guide pin 34 slides left and right along the guide groove 36 and at the same time slides up and down 35. It moves up and down by pushing). At this time, the slide plate 34 is limited in the left and right movement by the guide rail 38 and the movement force in the left and right directions of the guide pin 34 is lost by the sliding movement of the guide groove 36 The rotational movement of the guide pin 34 is converted to the vertical movement of the slide plate 34.

That is, when the guide pin 34 rotates together with the rotary gear 33, the guide pin 34 reciprocates from side to side along the guide groove 36 and simultaneously slides the slide plate 36 up and down. Reciprocated. Accordingly, the slide rod 63 fixed to the slide plate 35 also vertically reciprocates. For example, when the rotary gear 33 is rotated about one time, the slide rod 63 also reciprocates once.

Meanwhile, the face gear 54 fixed to the pedal shaft 13 is rotated at the same speed as the shaft gear 21 to transmit the rotational force to the helical gear 75. Subsequently, the helical gear 75 rotates the rotation shaft 73 integrally formed at the upper end thereof, thereby rotating the flywheel 56 fixed to the upper end of the rotation shaft 73. At this time, since the helical gear 75 is much smaller than the face gear 54, when the pedal shaft 13 rotates once, the helical gear 75 and the flywheel 56 connected to the helical gear 75 are It will rotate several times. For example, when the pedal shaft 13 is rotated once, the flywheel 56 is rotated four times. Therefore, when the pedal shaft 13 is rotated, the slide rod 63 is vertically reciprocated vertically by the action of the cam device, and the flywheel 56 has a high speed around the slide rod 63 which is reciprocated. Will rotate. Accordingly, the flywheel 56 drives the pedal shaft 13 with the rotation force accumulated by the rotational inertia to assist the reciprocating motion of the slide rod 63. Accordingly, the reciprocating motion of the slide rod 63 is naturally made without breaking.

8 is a side sectional view showing an embodiment in which a generator 90 including a rotor 93 and a stator 95 is installed on an upper end of the rotation shaft 73. When a plurality of LEDs (LEDs) 97 electrically connected to the generator 90 are installed in the main body 57, bright light is emitted as the rotating shaft 73 rotates. In particular, since the flywheel 56 installed with the LED 97 rotates at a high speed, various shapes and effects can be achieved according to the arrangement method of the LED 97. In addition, according to the present invention, the flywheel 56 rotating at a high speed may obtain various sound effects by installing various types of resonators (a whistle).

5 is a sectional view of the saddle elevating device 10 according to the present invention as seen from the front wheel side, referring to this case, the rotary gear 33 according to the present invention is rotatable about a central axis 32. It is arranged on one side of the, and the inner surface of the case 40 is provided with an annular support rib 43 so that the rotary gear 33 can rotate smoothly. In addition, the case 40 is integrally formed with a guide rail 38 for preventing the slide plate 35 from moving left and right and a support protrusion 47 rotatably supporting the lower end of the rotation shaft 73. . In addition, support ribs 44 are integrally formed on the other inner surface of the case 40 to smoothly rotate the face gear 54.

As described above, the case 40 has a pedal shaft 13 and the rotary gear 33 is arranged, the fixing member 6 is fixed to the lower frame 4 is coupled, and various support ribs 43, 44 ), Since the support protrusion 47 and the guide rail 38 are integrally formed, it is preferable that the support protrusion 47 and the guide rail 38 are made of an alloy material that is durable and lightweight, such as an aluminum alloy.

On the other hand, in order to exercise the saddle (9) up and down so that the occupant feels riding, the saddle (9) should be installed at the tip of the slide rod (63) vertically up and down. In this case, when the saddle 9 is directly installed on the slide rod 63, the saddle 9 always moves up and down while the bicycle moves forward. However, in some cases, the vertical motion of the saddle 9 may be unnecessary or difficult, so it is preferable to selectively separate the saddle 9 from the slide rod 63.

Accordingly, Figure 6 is a partially cut perspective view showing an embodiment for selectively connecting the saddle fixing pipe 23 to the tip of the slide rod 63 vertically moving according to the present invention. As shown in the figure, the saddle fixing pipe 23 having the saddle 9 fixed at the top thereof is slidably installed inside the support frame 26 fixed to the upper frame 8 of the bicycle, and at the bottom thereof The stopper 27 which comes into contact with the tip of the slide rod 63 is provided. At the tip of the slide rod 63, a locking protrusion 29 is inserted into the locking groove 28 of the saddle fixing pipe 23. And the upper part of the saddle fixing pipe 23 is provided with a ring-shaped locking ring 65 formed with a cut groove 66 on one side, and the cut groove 66 and the support frame on the saddle fixed pipe 23. A locking bar 67 that can pass through the guide channel 25 formed to a predetermined length is fixed to the upper end of the 26.

Therefore, in the state where the notch groove 66 of the catching ring 65 and the guide channel 25 of the support frame 26 do not coincide with each other, the catching rod 67 is fixed to the top of the catching ring 65 to fix the saddle. Since the bottom of the saddle fixing pipe 23 and the top of the slide rod 63 are separated because the pipe 23 does not descend downward, the vertical movement of the slide rod 63 is not transmitted to the saddle fixing pipe 23. Do not. On the other hand, when the locking ring 65 is rotated to match the notch groove 66 and the guide channel 25, the locking bar 67 formed in the saddle fixing pipe 23 is released to release the saddle fixing pipe 23. It comes down. Then, the tip of the slide rod 63 and the stopper 27 of the saddle fixing pipe 23 are brought into contact with each other so that the saddle fixing pipe 23 vertically moves together with the slide rod 63. Therefore, the occupant sitting on the saddle 9 fixed to the saddle fixing pipe 23 can feel the riding horse. At this time, the stopper 27 is preferably provided with a shock absorbing member that can cushion the impact.

And when the occupant wants to stop the riding function, when the saddle fixing pipe 23 is raised by rotating the hook ring 65 so that the hook rod 66 is caught by the hook 65, the slide rod 63 The contact with) is broken and no longer vertical movement.

Looking at the operation of the saddle elevating device 10 according to the present invention with reference to Figure 7, when the rotary gear 33 is engaged with the shaft gear 21 by the drive of the pedal shaft 13, the rotation Guide pins 34 installed on the inner surface of the gear 33 are circular motions along the rotary gear 33, drawing a trajectory (A). Accordingly, a force for circular motion is also applied to the slide plate 35 connected by the guide groove 36 into which the guide pin 34 is inserted. However, since the guide pin 34 is slid left and right along the guide groove 36, the force in the lateral direction is lost by the sliding movement and only the force in the vertical direction is applied to the slide plate 35. In addition, since the guide rail 38 is installed to the left and right of the slide plate 35 to restrict movement in the left and right direction, the slide plate 35 only vertically moves up and down.

At this time, the guide grooves 36 into which the guide pins 34 are inserted are made of grooves having the same size as the diameter of the guide pins 34 and are inclined toward one side, so that the sliding motion is smoothly performed. Therefore, when the slide plate 35 is located at the lowest point and the highest point as the rotary gear 33 rotates, the guide pin 34 is positioned at the inclined portion of the guide groove 36 and the slide plate 35 is intermediate. If the position is located at the end of the upper end and the lower end.

That is, when the slide plate 35 at the lowest point rises as the rotary gear 33 rotates, the guide pin 34 moves from the inclined portion of the guide groove 36 toward the upper end thereof, The slide plate 35 is moved upward because the upper surface is pushed to the upper side. On the other hand, when the slide plate 35 at the highest point descends according to the rotation of the rotary gear 33, the guide pin 34 moves downward from the inclined portion to the lower portion and presses and pulls down the lower surface of the guide groove 36. Since the slide plate 35 is moved downward. In this way, when the slide plate 35 is located at the highest point and the lowest point to change the direction, the direction change is made smoothly because the guide pin 34 is located at the inclined portion.

Accordingly, the slide plate 35 vertically reciprocates by a length H corresponding to the diameter of the movement trajectory A of the guide pin 34. Accordingly, the slide rod 63 integrally fixed to the slide plate 35 and the saddle fixing pipe 23 and the saddle 9 selectively connected to the slide rod 63 also move up and down by the same length. . As such, the saddle elevating device 10 is driven by a rotational force generated by the passenger to step on the pedal 11, so much more force must be applied than the conventional bicycle. In addition, since the force varies depending on the weight the occupant applies to the saddle 9, the weight of the saddle can be properly adjusted so that the amount of exercise can be properly adjusted.

Next, Figure 9 is a front view showing another embodiment of the saddle elevating device 10 according to the present invention, as shown in the present embodiment, two shaft gears which are spaced apart from each other on the bicycle pedal shaft 13 ( 21 and two rotary gears 33 rotatably engaged with the shaft gear 21. And between the rotary gear 33, the slide plate 35 is fixed to the slide rod 63 is integrally installed to move up and down. At this time, the guide pin 34 formed on the inner surface of the rotary gear 33 is inserted into the guide groove 36 formed to correspond to both sides of the slide plate 35 to move the slide plate 35 up and down. Thus, in this embodiment, since the rotary gear 33 is installed on both left and right sides, it is possible to prevent the slice plate 35 from being pulled to one side or excessive load.

On the other hand, Figure 10 is a side view showing another embodiment of the saddle lifting device 10 according to the present invention, the saddle lifting device 10 is the upper frame 8, the lower frame 4 and the supporting frame 26 It shows the case where it is installed on the pedal bearings welded to each other. That is, in the present embodiment, when the shaft gear 21 provided on the pedal shaft 13 is engaged with the rotary gear 33 installed on the upper portion thereof to transmit rotational force, the rotary gear 33 is connected to the guide pin 34. By moving the slide plate 35 up and down to move the slide rod 63 coupled to the rear of the slide plate 35 up and down. As such, the saddle riding device 10 according to the present embodiment is similar to the above-described embodiment except that the saddle riding device 10 is located above the pedal bearing.

As such, the present invention installs a saddle elevating device that can convert the rotational motion into a vertical motion through the cam device on the pedal shaft of the bicycle so that the occupant can drive the saddle on which his weight is carried by his own power to feel riding. At the same time to increase the exercise effect. Therefore, the saddle elevating device 10 according to the present invention, as shown in Figure 11, it is also possible to apply as it is to the fitness bicycle 100 having only an exercise function. That is, the fitness bicycle 100 converts the rotational force of the pedal shaft into a vertical reciprocating motion so that the saddle on which the occupant sits moves up and down, not only to feel riding, but also to increase the saddle on which his weight is loaded. The exercise effect is increased because it has to be added.

As such, the saddle elevating device according to the present invention can be modified in various forms by those skilled in the art within the scope of the rights described in the claims of the present invention, but this is the vertical motion of the pedal shaft rotational movement It can be seen that it belongs to the technical idea of the present invention to feel the riding feeling by moving the saddle up and down by converting to.

As described above, the present invention causes the saddle to move up and down by the rotational force of the pedal axis when driving in a bicycle, causing the passenger to feel riding, thereby inducing the interest of riding a bicycle and increasing the amount of exercise of the occupant. By increasing the has the effect that can contribute to national health through bicycles.

The present invention is to vertically exercise the saddle on which the occupant himself sits with his own power, so not only does it increase the amount of exercise compared to the conventional bicycle, but also adjusts the weight applied to the saddle according to the physical condition of the occupant, so that There is an effect that can be achieved in time.

Claims (8)

In a bicycle comprising a predetermined frame, a front wheel having a steering function, a rear wheel having a driving function and a power transmission means for driving the rear wheel, A shaft gear fixed to the pedal shaft of the bicycle; A rotary gear that meshes with the shaft gear to transmit rotational force; A slide plate having a guide groove connected to the rotary gear via a guide pin to convert the rotational movement into a vertical movement; The bicycle having a saddle lift device, characterized in that it comprises a slide rod fixed to the slide plate to vertically move the saddle in which the occupant sits up and down. The method of claim 1, The slide plate is a plate-like body having a width similar to that of the rotary gear, a guide groove into which the guide pin is inserted is formed at the front side thereof, and a slide rod for vertically moving the saddle is fixed at the rear side thereof, and on both sides thereof in a left-right direction. Bicycle provided with a saddle lifting device, characterized in that each guide rail is formed to limit the movement of. The method according to claim 1 or 2, The guide groove is stepped to the upper end and the lower end, the bicycle with a saddle lifting device characterized in that a predetermined inclination is formed between the upper end and the lower end. The method of claim 1, A face gear spaced apart from the shaft gear and fixed to the bicycle pedal shaft; A helical gear disposed at right angles to the face gear to transmit rotational force; A hollow rotating shaft integrally formed with the helical gear and slidably penetrating the slide rod; Bicycle with a saddle lifting device characterized in that it comprises a flywheel integrally coupled to the top of the rotary shaft. The method of claim 4, wherein A small generator installed on the top of the rotating shaft and composed of a stator and a rotor; Bicycle equipped with a saddle lifting device characterized in that it comprises a plurality of LED (LED) installed in the body of the flywheel to be electrically connected to the generator. The method of claim 1, A saddle fixing frame selectively contacting the tip of the slide rod; A support frame through which the saddle fixing frame is slidably supported by the bicycle frame; A hook ring installed at the top of the saddle fixing frame to selectively pass the catching rod protruding from the upper portion of the slide rod; A guide channel formed at an upper end of the support frame to guide the locking rods; The saddle lifting device having a saddle lifting device, characterized in that it comprises a stopper fixed to the lower end of the saddle fixing pipe is in contact with the tip of the slide rod. In a bicycle comprising a predetermined frame, a front wheel having a steering function, a rear wheel having a driving function and a power transmission means for driving the rear wheel, Two shaft gears fixed to the pedal shaft of the bicycle; Two rotary gears engaged with the two shaft gears to transmit rotational force; A slide plate having two guide grooves connected to each other by a guide pin protruding from the rotary gear to convert the rotational motion into a vertical motion; The bicycle having a saddle lift device, characterized in that it comprises a slide rod fixed to the slide plate to vertically move the saddle in which the occupant sits up and down. In a bicycle comprising a predetermined frame, a rotating disk and a power transmission means for driving the rotating disk, A shaft gear fixed to the pedal shaft of the bicycle; A rotary gear that meshes with the shaft gear to transmit rotational force; A slide plate having a guide groove connected to the rotary gear via a guide pin to convert the rotational movement into a vertical movement; The bicycle having a saddle lift device, characterized in that it comprises a slide rod fixed to the slide plate to vertically move the saddle in which the occupant sits up and down.