KR101599638B1 - Saddle in health type bicycle for riding - Google Patents

Abstract

The present invention relates to a saddle of a health-type horse riding bicycle. The saddle of a health-type horse riding bicycle comprises: a bicycle frame to which front and rear wheels are coupled to be rotated; a pedal driving part which allows pedals coupled to the bicycle frame to rotate the rear wheel; a saddle which is arranged on the top of a module post of the bicycle frame; a variable extension module which is connected between the bicycle frame and the saddle, performs a two-stage vertical movement by selectively applying the resultant force of the elastic force of external and internal springs or the elastic force of the external spring to the saddle, and enables the replacement of the external and internal springs formed in a set; a lower mounting block which connects the variable extension module to a module post of the bicycle frame; and an upper mounting block which connects the variable extension module to a saddle rail of the saddle. Therefore, the present invention provides a user with a sense of rhythm in accordance with a horse riding motion.

Description

Saddle-in-Heath Type Bicycle for Riding

[0001] The present invention relates to a saddle of a fitness type riding bicycle, and more particularly, to a saddle of a fitness type riding bicycle capable of eliminating boredom and increasing exercise effect through whole body exercise when moving.

Generally, a horse-riding exercise device includes a horse-riding robot that implements the movement of a horse in a 3D virtual environment, a power-driven (e.g., electric motor) riding exercise machine that moves eight characters along the vertical direction, There is a riding bicycle that uses weight and weight shift of the user.

The devices using equestrian movements stimulate the unused muscles evenly to help the whole body exercise, and the calorie consumption per hour of riding is relatively higher than jogging and swimming, helps to maintain the posture and to enhance the sense of balance, Can be used for energy-intensive exercises, is effective in decreasing body fat and increasing muscle strength, promoting diet and spine health, and is said to be excellent for bowel movements and constipation.

However, the horse riding exercise machine of Patent Document 1 or the electric energy use riding exercise machine which is the background of the invention is very expensive and requires a complicated operation device for simulating actual horse movements, it's difficult.

The riding type saddle for bicycle of Patent Document 2 is a saddle which is applied to a bicycle or a bicycle for a health, in which the saddle moves up and down and moves forward and rearward in a sliding manner.

However, since the up-and-down and back-and-forth movement of Patent Document 2 uses a spring and a guide portion, it is generated irregularly due to the weight movement of the user and impact that may occur during bicycle travel, Because you have to continue to apply muscle strength while sitting on the saddle, muscle fatigue increases fatigue.

In addition, the upward and downward movement and the back and forth movement of Patent Document 2 may occur bodily when riding a bicycle, because the spring responds to the direction in which the user applies force only in a direction in which the spring exerts a repulsive force.

In addition, the riding type saddle for bicycle according to Patent Document 2 can not change the elastic force of the spring during the movement, stores the elastic force of the inner spring, repeatedly or repeatedly uses the stored elastic force of the inner spring in combination with the elastic force of the outer spring As there is no means for regular implementation, the saddle can move rapidly from below the user's hip to the upper side, or move up or down using a relatively weak elastic force (e.g., elastic force of the outer spring alone) It is not possible to regularly generate a two-step up and down movement using a strong elastic force (for example, an elastic force of an outer spring and an inner spring).

In addition, the riding type saddle for bicycle according to Patent Document 2 has a disadvantage in that it causes pain to the user's buttocks during prolonged use because the user's buttocks must be closely contacted to the saddle for riding exercise. The elastic force can not be changed on the way.

In addition, the bicycle having the riding action function disclosed in Patent Document 3 has a ride-up bar and a cam so that a riding-driving function and a general bicycle can be selected and enjoyed.

However, the cam and the ascending / descending bar in Patent Document 3 merely induce the upward or downward movement of the saddle, and can not use the stored elastic force at once because of storing the elastic force, and can not implement the two-step up and down movement regularly.

[Patent Literature]

(Patent Document 1) Korean Patent No. 10-1338734 (Dec. 2, 2013)

(Patent Document 2) Korean Patent No. 10-0678606 (Mar. 29, 2007)

(Patent Document 3) Korean Patent No. 10-0658946 (December 12, 2006)

SUMMARY OF THE INVENTION It is an object of the present invention to provide a vibration modulus expansion / contraction module between a cushion frame and a saddle, thereby providing a user with a rhythm sensation according to a horse-riding motion, and a plurality of shock absorbers shock absorber, it is possible to induce a user's upper body motion through a handle bar having a plurality of knob structures, and can be applied to a moving body exercising apparatus To provide a saddle for a health-style riding bicycle.

According to an aspect of the present invention, there is provided a bicycle comprising: a bicycle frame in which a front wheel and a rear wheel are rotatably coupled; A pedal driver for rotating the rear wheel with a pedal coupled to the bicycle frame; A saddle disposed on an upper side of a module post of the bicycle frame; A saddle which is connected between the bicycle frame and the saddle and selectively applies the combined force of the external spring and the internal spring or the elastic force of the external spring to the saddle so as to perform the two- A variable elasticity module capable of replacing the inner spring; A lower seating block connecting the module posts of the bicycle frame and the modulus expansion and contraction module to each other; And a top seating block connecting the voluntary telescopic module and the saddle rail of the saddle to each other.

Further, the bottom surface of the lower seating block is welded to the upper surface of the module post.

In addition, an upper insertion hole for vertically inserting the locking protrusions of the lower locking protrusion in a mutually mating manner is formed on the upper surface of the lower locking block in correspondence with the cross-sectional shape of the lower locking protrusion of the variable elastic expansion module, And a bolt hole is formed in a side surface of the lower seating block so as to pass through the upper insertion hole and the coupling hole of the fastening protrusion of the lower complex.

A lower insertion hole for inserting the locking projections of the upper locking protrusion in a mutually mating manner is formed in the upper and lower directions of the upper locking block in correspondence with the cross sectional shape of the upper locking groove of the upper and the lower locking blocks, And a bolt hole is formed in a side surface of the upper seating block so as to pass through the lower insertion hole and the coupling hole of the coupling protrusion of the upper peripheral wall.

The saddle further includes a saddle space formed along a longitudinal direction of the saddle in the middle of an upper surface of the saddle.

The bicycle frame includes a yoke rotatably coupled to a hinge of a down tube of the bicycle frame, a cantilever bent from the yoke and extending toward the seat stay of the bicycle frame, And a cushion frame having a post clamp coupled to the post mounting portion to fix the module post to be fitted to the post mounting portion in a detachable manner.

In addition, the volatility expansion and contraction module installed on the basis of the module post may include: a lower housing joined to a lower housing block at an upper portion of the module post; An upper abutment zone coupled to an upper abutment block at the bottom of the saddle; Said outer spring being disposed between said lower jar and said upper jar; A hollow tube-shaped module main body detachably coupled to a screw hole on the upper surface of the lower housing; Said inner spring seated on the bottom of said screw hole of said lower jar; A pusher supported by the inner spring within the module body; And a fixing hook fixed to an upper inner surface of the module main body, wherein a plurality of guide holes and a plurality of guide grooves extend in the longitudinal direction of the fixing hook, respectively, And the guide groove has a groove depth which is relatively smaller than a depth of the guide hole.

The variable expansion and contraction module may further include a variable shaft portion inserted inside the fixed hook and having a rod protruded to the outside of the module body, and the variable shaft portion is provided between the open bottom portion and the closed upper portion, And a rod extending upward from the closed top of the knob and protruding out of the module body and then screwed into a threaded hole in the bottom surface of the top shell, Wherein the knob has a plurality of guide protrusions formed on an outer circumferential surface of the knob so as to be slidably inserted into the guide hole and the guide groove; And a V-shaped guide surface formed in the bottom surface of the side wall of the knob in a number corresponding to the guide projection along the circumferential direction.

The fluctuating expansion / contraction module is disposed between the variable shaft portion and the pusher, and is movable upward or downward within the fixed hook, or is rotated at the outside of the fixed hook or stops at the stop jaw of the fixed hook. Wherein the change gear comprises: a gear shaft inserted into a space inside the side wall of the knob; a hollow rotary gear having a diameter larger than that of the gear shaft and opened at the bottom; A rib formed on an outer peripheral surface of the hollow rotary gear; And an inclined surface formed at the upper end of the rib and in contact with the guide surface.

The pusher may further comprise: a disc in contact with the inner spring; A spring insertion protrusion protruding downward from the bottom of the disk; A contact protrusion protruded upward from an upper portion of the disc and inserted into the inner space of the hollow rotary gear; And a plurality of wedge portions formed on an upper portion of the contact protrusion so as to be in point contact with the ceiling of the inner space of the hollow rotary gear.

According to an aspect of the present invention, there is provided an effect modifying and expanding module having a plurality of springs, thereby providing a user with a rhythmic feeling according to a horse-riding motion, thereby maximizing the exercise effect. In other words, it exerts a lot of exercise effect in comparison with a short time, and can contribute to the health of a modern person who lacks time.

Here, the spring of the modulus of elasticity expansion / contraction module may be an external spring or an internal spring, and may be provided in a plurality of or a set for each user's body weight. That is, the elastic force of the outer spring or the inner spring or the load applied to the spring can be determined at a predetermined ratio with respect to the weight per user, and the outer spring or inner spring can be selected from among the spring sets according to the weight of the user, .

In addition, the present invention can further include a variable shaft portion, a fixing hook, a change hook, and a pusher inside the module main body of the variable elasticity expansion module to selectively change the up / down motion of the saddle.

That is, each time the variable shaft expansion / contraction module supporting the saddle on the basis of the cushion frame presses the variable shaft portion of the modulus expansion / contraction module through the saddle with the user's buttocks, the elastic force acts between the external spring and the internal spring regularly, The cushioning feeling is small but the elastic repulsion force is made large or the elastic force acts of the external spring and the internal spring are separated from each other so that only the elastic force action of the external spring is used so that the cushioning feeling can be made larger instead of reducing the elastic repulsive force.

In addition, the modulus of elasticity expansion / contraction module of the present invention maintains the inner spring in a compressed state to store the elastic reaction force of the inner spring, It is possible to regularly implement a so-called fast-rising movement in which the saddle is closely contacted with the buttocks through the resultant force in a state where the rump and the saddle of the user are separated during actual riding.

According to the present invention, there is provided a cushion frame provided with a variable elasticity expansion module, wherein a plurality of shock absorbers are connected to the cushion frame rotatably coupled to the hinge of a down tube of a bicycle, By performing the motion, a seesaw motion (for example, a back and forth rotational motion) can be implemented in the present invention together with the up-down motion of the variability elasticity module.

In addition, the present invention can provide a cushioning and shock-absorbing function using the shock absorber, and a user can selectively grip the handlebar of the handle bar having a plurality of handle structures to conveniently change the user's upper- Can be made variously.

In addition, the present invention can be applied to a bicycle in which a user in a state in which a part (for example, one side load) of a user's body weight is applied to a pedal of a bicycle while moving on a bicycle, The other side load) is applied to or removed from the saddle and volatility expansion / contraction module, the upper and lower and seesaw motions similar to horse riding can be performed in an interesting and continuous manner.

That is, the present invention can exercise repetitively or regularly by using the weight while riding the rhythm while moving, and when the discomfort occurs due to excessive contact between the hip and the saddle, the saddle is pressed into the buttocks and the pushing force It is possible to induce the user to ride the bicycle while he or she is riding the bicycle, and it is possible to improve the comfort of the user, By exercising, it is possible to develop the muscles of the part which is not used well, and to induce the development and recovery of the internal organ of the user who exercised using the present invention.

As described above, the present invention is able to perform a whole body movement while moving, compared to a general bicycle which is focused on speed as a moving means and can only perform a lower body motion and does not become an upper body motion.

That is, the present invention can be used for a variety of purposes such as health and physical therapy effects and a movement mechanism for leisure through a volumetric stretching module and a handlebar. In particular, when a user has a lumbar disc stenosis, With the cushion and seesaw effect and the shock-absorbing function in the bending and spreading of the waist, it is possible to feel the coolness and the strength of the waist.

In addition, the present invention can repair / manufacture bicycle owned (abandoned) products, that is, collect waste bicycles, and repair / manufacture bicycle bicycles of the present invention and sell them, You can contribute.

Further, the present invention can be used in related industries for health and physical therapy function effects, leisure and movement mechanisms (e.g., bicycles, motorcycles) and the like.

1 is a side view of a fitness type riding bicycle according to a first embodiment of the present invention;
2 is a perspective view of the handlebar shown in Fig.
3 is a front view of the handlebar shown in Fig.
4 is an exploded perspective view of the volumetric expansion and contraction module shown in Fig.
5 is a cross-sectional view of line AA shown in Fig.
6 is a cross-sectional view of line BB shown in Fig.
7 is a cross-sectional view of line CC shown in Fig.
Fig. 8 and Fig. 9 are engagement sectional views of the variational stretch shrink module shown in Fig. 4;
10 is a side view for explaining a method of replacing the external spring and the internal spring in the variable elasticity module shown in FIG.
FIG. 11 is a view for explaining the coupling relationship of the saddle shown in FIG. 1; FIG.
12 to 14 are schematic cross-sectional views for explaining the operation principle of the variational stretch module shown in Fig.
15 is a side view of a fitness type riding bicycle according to a second embodiment of the present invention.
16 is a perspective view of the handlebar shown in Fig. 15;

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, well-known functions or constructions are not described in detail since they may obscure the subject matter of the present invention.

In addition, the present invention generally refers to a device having a general bicycle structure that is driven by wheels, or a structure of a fitness device that performs a bicycle movement in a fixed state without wheels, and is a general component provided in each device , A gear transmission, a pedal, a gear shift set, a brake, or a spindle are not shown in the drawings, but can be understood as being commonly included in the present invention.

First Embodiment

1 is a side view of a fitness type riding bicycle according to a first embodiment of the present invention.

Referring to FIG. 1, the first embodiment may include a bicycle frame 100, a pedal driving unit 200, a volumetric stretching module 300, a handlebar 400, and a saddle 500.

The variability elasticity module 300 and the saddle 500 constitute one set and can be detachably attached to the existing bicycle.

The front wheel 101 and the rear wheel 102 are rotatably coupled to the bicycle frame 100.

The pedal drive unit 200 serves to rotate the rear wheel 102 with the pedal 201 coupled to the bicycle frame 100. To this end, the pedal 201 transmits the pedal driving force of the user to the chainring via the crank arm, and the pedal driving force is transmitted to the sprocket of the rear wheel 102 through the chain of the chainring. The sprocket is connected to the rear wheel 102. Accordingly, the rear wheel 102 rotates by the pedal driving force, so that the present invention can be advanced like a general bicycle.

The variability elasticity module 300 is connected between the bicycle frame 100 and the saddle 500 and selectively outputs the resultant force of the elastic force of the outer spring 310 and the inner spring or the elastic force of the outer spring 310, 500) so that regular two-step vertical motion can be performed. That is, the variability elasticity module 300 can exhibit the equestrian effect. Herein, the horse-riding effect may mean that the saddle is hammered at a stable and constant interval by changing the expansion or contraction of the outer spring 310 or the inner spring 320 to regular exercise.

The handle bar 400 has four knobs in combination with the numbers "2" and "5 ". The user's hand is able to move up and down like the four knobs and by changing the position of the user's upper body by changing the position to hold, it is possible to move the upper body arm, shoulder, It plays a role.

The saddle 500 is a device connected or detachably coupled to the modulus expansion and contraction module 300 located below the saddle 500. The saddle 500 induces a horse-riding effect through a function of moving up and down in two stages. The saddle 500 is manufactured to have a horse-like shape, and has a longitudinal length 1.5 times longer than that of a saddle of a general bicycle.

10, the outer spring 310 or the inner spring 320 may be provided in the spring set S1 or S2 so as to have different elastic moduli according to the weight of the user, . The module main body 330 may be detachably coupled to the lower housing core 340 of the variable elasticity expansion module 300 in order to replace the outer spring 310 or the inner spring 320. [

1, the bicycle frame 100 includes a head tube 103 to which the front wheel 101 is rotatably coupled and a down tube 105 (hereinafter referred to as a " front ") 105 which is inclined from the head tube 103 to the pedal shaft hub 104 And a chain stay 106 which extends horizontally rearward from the pedal shaft hub 104 and to which the rear wheel 102 is rotatably coupled.

The bicycle frame 100 includes an end of a chain stay 106 to which the rotational axis of the rear wheel 102 is coupled and a seat stay 107 which is connected to the outer circumferential surface of the pedal shaft hub 104 to form a triangle.

A joint portion 104a is further provided between the down tube 105 and the pedal shaft hub 104 to allow the turning of the chain stay 106 seat stay 107. Here, the joint portion 104a may be made in the form of a pivot or a joint. For example, the joint portion 104a includes a joint body that is connected at the pedal shaft hub 104 and protrudes forward, a yoke structure formed at the end of the joint body, and a joint pin coupled at the yoke structure. The lower end of the down tube 105 is inserted into the yoke structure of the joint portion 104a and is rotatably coupled about the joint pin.

In addition, the bicycle frame 100 includes a cushion frame 110 seesawing based on the down tube 105. The cushion frame 110 includes a yoke 111 yoke rotatably coupled to the hinge 108 of the down tube 105 and a yoke 111 yoke 111 bent toward the seat stay 107 A post mount 113 provided at an end of the cantilever 112 and a module post 114 to be fitted to the post mount 113 are detachably attached to the post mounting part 113, And a post clamp 115 coupled to the post 113. Here, the post clamp 115 can be used for adjusting the height of the module post 114, such as a hollow shaft member fitted in the post mount 113. [

That is, when the user releases the post clamp 115, the post mounting portion 113 is loosened, and the module post 114 can be moved upward or downward. Conversely, when the post clamp 115 is locked, the post mounting portion 113 is brought into close contact with the module post 114, and the module post 114 can be held in a fixed state.

In addition, the bicycle frame 100 includes a plurality of shock absorbers 120, 130, and 140 connected in the vertical direction (Z-axis direction) or the front-rear direction (X-axis direction). The connection points of the respective rings of the shock absorbers 120, 130 and 140 in the following can be connected by bolts and nuts. At this time, using a suitable tool (such as a socket wrench), the nut can be detached or fastened from the bolt.

The cushion shock absorber 120 connects one side ring to the upper bracket of the pedal shaft hub 104 and connects the other side ring to the bottom bracket of the cantilever 112 of the cushion frame 110. The cushion shock absorber 120 can exhibit the cushioning effect, the comfort and the seesaw effect.

The front cushion shock absorber 130 connects one side ring to the rear bracket of the down tube 105 provided at the upper side of the hinge 108 and has a cushion frame 110 provided at the bent portion of the yoke 111 and the cantilever 112 And the other side is connected to the front bracket.

The rear shock absorbing shock absorber 140 connects one side of the rear bracket of the post mounting portion 113 and the other side of the seat stay 107 to the upper bracket.

The front cushion shock absorber 130 and the rear cushion shock absorber 140 can exhibit the shock-absorbing effect.

The bicycle frame 100 is mounted on the lower bracket provided on the seat stay 107 so as to be spaced apart from the upper bracket of the seat stay 107 along the seat stay 107 by the length of the rear shock absorber 140 109).

Specifically, the rear shock absorber 140 rotates about the connecting point of the upper bracket of the seat stay 107 as the center of rotation after releasing the bolt or nut to separate the one side ring from the rear bracket of the post mount 113, (For example, bolts and nuts are reunited) on the lower bracket 109 of the seat stay 107. [

 In this case, the variability of the seesaw motion of the cushion frame 110 can be relatively increased.

In other words, the cushion frame 110 can have a greater fluctuation width in a more rhythmic manner.

Since the rear shock absorber 140 can be stored between the upper bracket 109 and the lower bracket 109 of the seat stay 107 without being completely removed from the bicycle frame 100, Non-use can be determined.

The plurality of shock absorbers 120, 130, and 140 together with the variability elasticity module 300 can be used to move the saddle 500 up and down in a cushion and shock relieving manner, (A seesaw motion in which the seat 500 moves forward or backward).

At this time, the operation of the saddle 500 by the volatility expansion / contraction module 300 is not limited to the operation of moving the saddle 500 from the lower side to the upper side of the user's sweater quickly or by using a relatively weak elastic force (e.g., elastic force of the outer spring 310 alone) It is possible to regularly generate two-stage up-and-down motions using up-down motions or relatively strong resilient forces [e.g., the sum of the elastic forces of the outer springs 310 and inner springs]. The two-stage vertical motion is described in detail below.

For example, the plurality of shock absorbers 120, 130, and 140 have a general spring damper configuration, and exhibit an irregular expansion / contraction action of the spring.

On the other hand, the variability elasticity module 300 further includes internal components to be described below so as to cause a regular riding operation similar to a user riding a horse.

2 is a perspective view of the handlebar shown in FIG. 1, and FIG. 3 is a front view of the handlebar shown in FIG. 2. FIG.

Referring to FIGS. 1 to 3, as described above, the bicycle frame 100 has a handle bar 400 formed of a combination of two-letter and five-letter shapes.

The handle bar 400 includes a stem 401 coupled to an upper portion of the head tube 103 of the bicycle frame 100, a first stage handle 410 extending horizontally on both sides of the stem 401, Stage handles 420 extending upwardly from both sides of the stem 410 and the front ends of the two ends of the handle 410, And a three-stage handle 430.

In particular, the left and right two-stage knobs 420 are bent at a first angle G1 of 15 to 20 degrees so that the Z-axis is inclined in the Y-axis direction on the YZ plane as shown in FIG. As shown in FIG. 1, bending is performed at a second angle G2 of 25 to 30 degrees such that the Z axis is inclined in the X axis direction on the XZ plane, that is, toward the front (e.g., leftward in FIG. 1) .

The values of the angles G1 and G2 are values for maximizing the upper body movement and comfort of the user. If the user holds the second-stage handle 420 at an above or below the numerical range, the wrist may be excessively bent, It has a critical meaning because it can fall.

In addition, the handlebar 400 further includes a lower handle 440 extending downward from the lower ends of both ends of the first-stage handle 410 rearwardly. The lower handle 440 may have a curved shape similar to or similar to the handle bar for a cycle bike.

In addition, although not shown in the lower stage handle 440 or the first stage handle 410, a brake adjusting device or a gear shifting type shifter may be further provided.

Further, rubber grip portions may be further coupled to outer surfaces of the first-stage knob 410, the second-stage knob 420, the third-stage knob 430, and the lower-stage knob 440.

FIG. 4 is an exploded perspective view of the variable elasticity expansion module shown in FIG. 1. FIG.

Referring to FIG. 4, the two-stage vertical movement of the above-described VLC module 300 includes an outer spring 310, an inner spring 320, a module body 330, a lower housing 340, Can be implemented through the stationary hanger 350, the variator shaft 360, the hanger spool 370, the pusher 380, and the top ring 390. That is, the two-step up and down movement may mean that the expansion and contraction is performed regularly in comparison with the irregular movement of the outer spring 310 or the inner spring 320.

Particularly, since the spring type of the outer spring 310 and the inner spring 320 selectively uses a spring load (e.g., elastic modulus) according to the user's weight, . ≪ / RTI >

The external spring 310 and the internal spring 320 of the variability elasticity module 300 can be distinguished by weight strength or spring load (kgf).

For example, the spring load of the basic external spring 310 is 20 kgf, which is 40% of the body weight, and the spring load of the basic internal spring 320 is 10 kgf, which is 20% of the body weight. Here, 1 kgf can mean the magnitude of the standard gravity acting on an object with a mass of 1 kg.

At this time, a load of 60% of the weight of the user can be applied to the outer spring 310 and the inner spring 320 through the saddle, and a load of 40% of the remaining weight can be applied to the pedal of the riding bicycle have. The user can enjoy the effects of up and down, back and forth movement and equestrian by repeating the load dispersion movement with respect to the pedal side or the saddle side.

The handle bar has a four-step handle structure such as a one-stage to three-stage handle and a bottom handle. By changing the position where the user holds the handle and changing the shape of the user's upper body, , The whole body movement can be performed in parallel with the up and down movement.

In addition, the weight strength (spring load) of the outer spring 310 and the inner spring 320 can be changed according to the user's taste.

Fig. 11 is a view for explaining the coupling relationship of the saddle shown in Fig. 1. Fig.

4 and 11, the lower jig 340 of the variability elasticity module 300 may be coupled to the lower seating block 150 at the upper portion of the module post 114.

For this purpose, a fastening protrusion 341, which can be formed in the upper insertion hole 151 of the lower seating block 150, is formed at a lower portion of the lower housing complex 340. Here, the fastening protrusion 341 is a circular shaft member having planes on both sides, and the fastening protrusion 341 is inserted into the upper insertion hole 151 and then rotated through a combination of the circumferential surface and the plane of the circular shaft member Can be avoided.

In addition, a circular body 342 having a relatively larger planar area than the fastening protrusions 341 is formed on the upper portion of the lower housing core 340. A threaded hole 343 is formed on the upper surface of the round body 342 of the lower arm protrusion 340 so as to be screwed into the male threaded portion 331 of the module body 330.

A positioning projection 344 that can be inserted into the inner spring 320 is formed on the bottom surface of the screw hole 343 to prevent the position of the inner spring 320 in the horizontal direction from being changed during the expansion and contraction .

8) of a shock absorbing rubber material or an elastic material may be further coupled to the upper portion of the positioning protrusion 344 and may be in contact with the spring insertion protrusion 382 of the pusher 380 The impact can be attenuated.

The upper surface of the circular body 342 of the lower housing core 340 except for the screw hole 343 may be a supporting surface for contacting the lower end of the outer spring 310.

The upper region 390 of the variability stretch module 300 may be coupled to the upper seating block 160 at the bottom of the saddle 500.

To this end, a fastening protrusion 391, which can be formed in the lower insertion hole 161 of the upper seating block 160, is formed at an upper portion of the upper wall 390. Here, the fastening protrusion 391 is a circular shaft member having planes on both sides, and the fastening protrusion 391 is inserted into the lower insertion hole 161 and then rotated through a combination of the circumferential surface and the plane of the circular shaft member Can be avoided.

A circular plate member 392 having a relatively larger planar area than the fastening protrusions 391 is formed in the lower portion of the upper phase zone 390. A screw hole 393 which can be screwed with the upper end of the variable shaft portion 360 (for example, the upper male screw portion of the rod 361) is formed on the bottom surface of the circular plate body 392 of the upper stage zone 390 .

The bottom surface of the circular plate body 392 of the upper circumferential wall 390 excluding the screw hole 393 may be a supporting surface for contacting the upper end of the outer spring 310.

The outer spring 310 is disposed between the lower housing core 340 and the upper housing core 390 at the completion of the assembling of the modulus expansion and contraction module 300.

The module main body 330 is screwed into the lower housing core 340 through the male screw portion 331 and is located inside the outer spring 310. [

The module main body 330 is a cylindrical part in which a male screw portion 331 is formed on the outer peripheral surface of the lower portion and a rod hole 332 is formed on the upper portion.

The module main body 330 is detachably screwed to the screw hole 343 on the upper surface of the lower housing core 340 for replacement of the outer spring 310 or the inner spring 320. [

The inner spring 320 is seated on the bottom of the screw hole 343 of the lower jar 340. At this time, the positioning protrusion 344 is inserted into the bottom space of the inner spring 320.

The pusher 380 is supported by the inner spring 320 inside the module main body 330 and serves to transmit the elastic force of the inner spring 320 to the changing hook 370.

To this end, the pusher 380 has a disk 381 sized to contact the inner spring 320 and to be inserted into the interior of the module body 330.

The pusher 380 has a spring insertion protrusion 382 protruding downward from the bottom of the disc 381 and a spring insertion protrusion 382 protruding upward from the top of the disc 381, A contact protrusion 383 inserted into the inner space and a plurality of wedge portions 384 formed on the contact protrusion 383 so as to be in point contact with the ceiling of the inner space of the hollow rotary gear 372 .

The spring insertion protrusion 382 of the pusher 380 functions to stop the downward movement of the pusher 380 by contacting the buffer pad 346 on the positioning projection 344 of the lower jig 340, It is possible to prevent the internal spring 320 from being damaged and prevent the internal spring 320 from being excessively compressed and to prevent the internal spring 320 from being damaged during the contact between the spring insertion protrusion 382 and the cushioning pad 346 on the positioning protrusion 344 The impact noise can be reduced.

The locking hook 350 can be fixed by welding after being inserted into the opposite position of the pusher 380, that is, the upper inner side of the module body 330. [ For example, a welding bead may be formed through welding at a point where the surface of the fixing hook 350 contacts the surface of the module main body 330, or a boundary line portion corresponding to the surface contact.

The retaining hook 350 may be a hollow tube component that can be airtightly inserted into the inner upper space of the module body 330.

The fixed hook 350 has a plurality of guide holes 351 and a plurality of guide grooves 352 each having a long and elongated shape extending in the longitudinal direction of the fixing hook 350.

5 is a cross-sectional view taken along the line A-A shown in Fig.

5, a plurality of guide holes 351 and a plurality of guide grooves 352 are alternately arranged along the circumferential direction of the retainer 350 in the retainer 350.

The guide groove 352 has a groove depth that is relatively smaller than the depth of the guide hole 351 and is formed on the inner circumferential surface of the tube of the fixture 350.

Referring back to FIG. 4, the fixed hook 350 plays a role in inducing the two-stage up-down movement of the variable shaft portion 360.

For this purpose, the fixing hook 350 is formed by cutting the lower end of the fixing hook 350, and includes a plurality of stopping jaws 353 and protruding holding surfaces 354 and 355 having a shape similar to that of a sawtooth shape.

Each of the stoppers 353 can be formed at a position where the guide groove 352 ends along the circumferential direction at the bottom end of the fixture 350 and the protrusion retention faces 354 and 355 can be formed at the positions corresponding to the amounts of the stoppers 353 A first protruding retention surface 354 formed between the guide hole 351 and the guide groove 352 and a second protruding retention surface 355 formed between the guide groove 352 and the other guide hole ).

The guide hole 351 can be formed at a position where the guide hole 351 ends.

The modulus expansion and contraction module 300 includes a variable shaft portion 360 that is inserted inside the fixing hook 350 and projects the rod 361 to the outside of the module body 330.

The variable axis portion 360 includes a knob 362 that forms a cylindrical sidewall between the open bottom and the closed top and an upwardly extending portion 364 that extends upwardly from the closed top of the knob 362, And includes a rod 361 which is projected outside the module body 330 through the rod hole 332 of the main body 330 and then screwed into the screw hole 393 on the bottom surface of the upper circumferential wall 390 do.

6 is a cross-sectional view taken along the line B-B shown in Fig.

6, the knob 362 includes a plurality of guide protrusions 363 formed on the outer circumferential surface of the knob 362 so as to be slidably inserted into the guide hole 351 and the guide groove 352.

5 and 6, each of the guide protrusions 363 has a protrusion height of a size large enough to be inserted and slidable corresponding to the groove depth of the guide groove 352. [ Therefore, each guide projection 363 can be inserted and slid in the guide hole 351 as well.

Referring back to FIG. 4, the length H1 of the guide protrusion 363 in the up and down direction corresponds to the length of the knob 362 in the vertical direction. That is, the guide protrusion 363 contacts with the guide groove 352 and the guide hole 351 of the fixing hook 350 in proportion to the size of the surface area of the up-and-down extension length H1 of the guide protrusion 363, And as a result, the variable shaft portion 360 can be firmly supported so as not to be excessively shaken in the horizontal direction.

The knob 362 includes a V-shaped guide surface 364 formed on the bottom surface of the side wall of the knob 362 in a corresponding number of the guide protrusions 363 along the circumferential direction.

The variability stretch and shrink module 300 is disposed between the variable axis portion 360 and the pusher 380 and moves upward or downward in the fixing hook 350 or rotates or holds the fixing hook 350 The stop 370 is stopped at the stopping stop 353 of the stopper 353.

The gear 370 includes a gear shaft 371 inserted into a space inside the side wall of the knob 362 of the variable shaft portion 360 and a gear shaft 371 integrally formed on the bottom of the gear shaft 371, 371 having a diameter larger than that of the hollow rotary gear 372 and having a bottom open.

The variable springs 370 include ribs 373 formed on the outer circumferential surface of the hollow rotary gear 372.

7 is a cross-sectional view taken along the line C-C shown in Fig.

5 and 7, the rib 373 is larger than the groove depth of the guide groove 352 and protrudes corresponding to the depth of the guide hole 351. Therefore, although the rib 373 can be moved up and down along the guide hole 351, the stop vertical movement can be stopped from the outside of the guide groove 352 corresponding to the stopping jaw 353.

4, the up and down extension length H2 of the rib 373 of the variation hook 370 is formed to be slightly longer than the vertical length of the hollow rotary gear 372. As shown in Fig. The rib 373 can be moved up and down while being in contact with the guide hole 351 of the fixing hook 350 in proportion to the size of the surface area of the upper and lower extension length H2 of the rib 373, So that the support member 370 can be firmly supported so as not to be excessively shaken in the horizontal direction.

An inclined surface 374 is formed at the upper end of each of the ribs 373 of the fluctuation hook 370 so as to be in contact with the guiding surface 364 of the knob 362 of the fluctuation shaft portion 360.

The inclined surface 374 is vertically moved along the guide hole 351 of the fixed hook 350 in a state of being in contact with the guide surface 364 in a slippery relationship with the guiding surface of the guide hook 351. At this time, The changing hook 370 itself is only moved up and down, and is not rotated in the circumferential direction.

On the other hand, when the guide hole 351 is moved out of the guide hole 351 during the vertical movement, it is possible to generate a rotational force capable of rotating the change hook 370 by the slip treatment relationship.

FIGS. 8 and 9 are combined cross-sectional views of the variational stretch module shown in FIG.

8 shows a state in which the rib 373 of the variation hook 370 and the guide projection 363 of the variation shaft 360 are arranged in the guide hole 351 of the fixing hook 350. [

9 shows a result of an external force (for example, a force transmitted through the buttocks or a saddle in a vertical direction) acting on the variable shaft portion 360, and the variable shaft portion 360 is rotated by the external force, Due to the sliding relationship between the inclined surface 374 and the guiding surface 364 during the lifting of the inclined surface 374 and the rising of the inclined surface 374 when the external force is weakened or removed, And only the variable shaft portion 360 is raised.

At this time, the variable shaft portion 360 is elastically supported by the outer spring 310. In addition, the inner spring 320 can remain compressed through the pusher 380. The compressed state may be a state where elastic force is stored in the inner spring 320.

9, in the case where an external force in the up-and-down direction further acts on the variable shaft portion 360, the variable shaft portion 360 and the variable spring 370 are returned to the state shown in Fig. 8 again in accordance with the following operation principle . The detailed operation description of Fig. 8 or Fig. 9 can be explained with reference to Figs. 12 to 14. Fig.

On the other hand, when an up / down external force further acts on the variable shaft portion 360 in the state of FIG. 9, the variable shaft portion 360 and the variable hook 370 return to the state shown in FIG. 8 again in accordance with the following operation principle .

That is, the two-stage up-and-down motions may occur regularly in response to the action of the external force.

In the two-step up and down movement, the variable shaft portion 360 moves up and down along the guide groove 352 and the guide hole 351 of the fixed hook 250, and the variable hook 370 is also pressed by the pusher 380 and the inner spring 320 The swing hanger 370 is stopped once at the top and once at the bottom while the swing hanger 370 is stopped during the up and down movements, As a result, the horse riding effect can be exhibited.

Since the wedge portion 384 of the contact projection portion 383 of the pusher 380 is in point contact with the ceiling of the inner space of the hollow rotary gear 372 of the variation hook 370, The impact noise can be reduced.

10 is a side view for explaining a method of replacing the external spring and the internal spring in the variable elasticity expansion module shown in FIG.

Referring to Figure 10, the spring set S1, S2, which can be replaced with respect to the variability elasticity module 300, includes a basic outer spring 310 and a basic inner spring 320, And may be provided to have different elastic moduli for different loads.

If the variability is accelerated, the user selects and uses another external spring 310a having a relatively small elastic modulus as compared with the basic external spring 310 in the corresponding spring set S1, The inner spring 320a having a relatively large elastic modulus is selected from the spring set S2 and used for replacement.

On the contrary, when the variability is to be slow, the user selects and uses another external spring 310b having a relatively greater elastic modulus than the basic external spring 310 in the corresponding spring set S1, Another inner spring 320b having a relatively small elastic modulus as compared with the inner spring 320 is selected and used in the spring set S2.

At this time, in order to replace the outer springs 310, 310a, 310b or the inner springs 320, 320a, 320b, the lower housing core 340 corresponding to the assembled cover is disassembled from the module body 300 using an appropriate tool, Can be reassembled.

Referring to FIG. 1, the saddle 500 is disposed on the upper side of the module post 114.

Referring to FIG. 11, the saddle 500 is formed so that its front side is narrower than the rear side.

The saddle 500 further includes a saddle space portion 540 formed along the longitudinal direction of the saddle 500 in the middle of the upper surface of the saddle 500 for preventing slippage.

In addition, the saddle 500 is manufactured in a bilaterally symmetrical shape with respect to the saddle space part 540, and can be made of a soft material for a cushion feeling or a comfortable feeling.

The present invention includes a lower seating block 150 connecting the modulus expansion and contraction module 300 and the module posts 114 of the bicycle frame to each other.

Also, the present invention includes an upper seating block 160 connecting the modulus expansion and contraction module 300 and the saddle rail 510 of the saddle 500 together.

The bottom surface of the lower seating block 160 is welded to the upper surface of the module post 114 and the upper surface of the upper seating block 160 is welded to the saddle 500 The saddle rail 510 of FIG.

Here, the stationary bracket 520 is on the saddle rail 510. Then, the coupling bolt 530 passes through the bolt hole of the stationary bracket 520 and is fastened to the bolt hole on the upper surface of the upper seating block 160. As a result, when the coupling bolt 530 is tightened, the bottom surface of the saddle rail 510 of the saddle 500 and the top surface of the upper seating block 160 can be brought into close contact with and fixed to each other.

The upper surface of the lower seating block 150 is provided with a fixing protrusion 341 of the lower housing complex 340 corresponding to the cross sectional shape of the lower housing complex 340 of the variational elasticity module 300, An upper insertion hole 151 is formed in the upper and lower direction of the lower seating block 150 for mutually interlocking insertion.

At this time, a bolt hole 152 is formed in a side surface of the lower seating block 150 so as to be connected to the upper insertion hole 151 and the connection hole 345 of the fastening protrusion 341 of the lower housing complex 340 Respectively.

The bolt and nut may be coupled to the connection hole 345 and the bolt hole 152 and the variable elastic expansion module 300 may be detached or installed from the lower seating block 150 through disassembly or reassembly of the bolt and nut have.

The bottom surface of the upper seating block 160 is formed with a sectional shape of the upper circumference 390 of the upper limit of the upper circumference 390 of the modulus of elasticity expansion module 300, A lower insertion hole 161 for inserting the fastening protrusions 391 of the upper mounting block 160 in the upper and lower directions of the upper mounting block 160 is formed.

A bolt hole 162 is formed in the side surface of the upper seating block 160 so as to pass through the lower insertion hole 161 and the coupling hole 394 of the fastener protrusion 391 . The bolt and nut may be coupled to the connection hole 394 and the bolt hole 162 and the variable elasticity expansion module 300 may be detached or separated from the upper seating block 160 through disassembly or reassembly of the bolt and nut. Can be installed.

Hereinafter, the operation principle of the variability elasticity module 300 will be described.

Figs. 12 to 14 are schematic cross-sectional views for explaining the operation principle of the variably stretchable and contractible module shown in Fig.

12, the modulus of elasticity expansion / contraction module 300 utilizes the elastic force of the outer spring 310 and the inner spring 320.

The left side of FIG. 12 is a state before the external force F in the up-and-down direction is applied, and may correspond to the sectional view shown in FIG. The right side of FIG. 12 shows a state in which an external force F is applied.

12, the inner spring 320 is configured to transmit the elastic force of the inner spring 320 to the rib 373 of the changing hook through the pusher 380 that performs the push function and the weight moving body function .

That is, in the left state of Fig. 12, the variable shaft portion 360 elastically deforms the saddle and the buttocks of the user using the resultant force of the elastic force of the outer spring 310 and the inner spring 320 until the right state of Fig. Can support.

The outer spring 310 is configured to transmit an elastic force to the guide protrusion 363 of the variable shaft portion 360.

The guide projections 363 of the variable shaft portion 360 and the ribs 373 of the variable hooks are slidable in the guide holes 351 of the fixed hooks 350. At this time, 364 are in contact with the inclined surfaces 374 of the ribs 373 and can be kept in contact with each other by the elastic force of the outer spring 310 and the inner spring 320.

12, when the external force F moves the variable shaft portion 360 downward, the guide protrusion 363 of the variable shaft portion 360 and the rib 373 of the change hook are engaged with the fixing hook 350 And moves downward along the guide hole 351.

In this process, the rib 373 of the changing hook exits the guide hole 351 of the fixing hook 350, but the guide protrusion 363 of the changing shaft portion 360 may remain in the guide hole 351 .

The rib 373 and the inclined surface 374 of the variable hinge 360 are not moved along the guide surface 364 of the variable shaft portion 360 while the variable shaft portion 360 is not rotated by the guide protrusion 363 under the elastic force. It is slidably raised and rotated. As a result, the inclined surface 374 of the rotated rib 373 is placed on the first projecting retention surface 354 of the retaining hook 350.

Referring to the left side of FIG. 13, as the user moves the body weight toward the pedal, the hip portion of the user pressing the saddle is moved upward so that the external force F becomes weaker than the elastic force of the external spring 310 .

The guide projection 363 of the variable shaft portion 360 is also engaged with the guide hole 351 of the fixing hook 350 so that the guide projection 363 of the variable shaft portion 360 is inserted into the guide hole 351 of the fixing hook 350, As shown in FIG.

On the other hand, the rib 373 and the inclined surface 374 of the variable hook, which are subjected to the elastic force of the inner spring 320 through the pusher 380, are slid along the first projecting retention surface 354 of the retaining hook 350 Up and rotate. As a result, the inclined surface 374 of the rotated rib 373 remains stationary at a lower position, such as the stopping jaw 353 of the fastening hook 350. Such a state can correspond to the sectional view shown in Fig.

In this state, even if the external force F is applied to the variable shaft portion 360 again, only the elastic force of the external spring 310 can be used to repel the external force F. [

That is, in the right side of Fig. 13, the variable shaft portion 360 can elastically support the saddle and the buttocks of the user using only the elastic force of the external spring 310. [

The internal spring 320 is in a compressed state and is moved up and down by the variable shaft portion 360 until the guide surface 364a of the variable shaft portion 360 comes into contact with the inclined surface 374 of the rib 373 of the variable spring. The elastic force of the inner spring 320 can not be transmitted. Here, the compressed state may mean that the elastic force of the inner spring 320 is stored.

On the other hand, the stopper 353 of the fixing hook 350 is positioned at the end of the guide groove 352.

At this time, the guide protrusion 363a of the variable shaft portion 350 is disposed in the guide groove 352 of the fixing hook 350, and the guide surface 364a is positioned below the guide protrusion 363a.

Further, the external force F can be applied to the variation shaft portion 360 more greatly than the elastic force of the external spring 310. [

In this case, the variable shaft portion 360 is moved downward again.

The guide protrusion 363a of the variable shaft portion 360 also moves downward along the guide groove 352 of the fixing hook 350 to be as shown in Fig.

14, after the guide surface 364a of the variable shaft portion 360 comes into contact with the inclined surface 374 of the rib 373 of the change hook, the elastic force of the outer spring 310 and the elastic force of the inner spring 320 And the resultant force of the stored elastic force can be used to repel the external force F. [

Then, when the variable shaft portion 360 is moved downward continuously after the guide surface 364a contacts the inclined surface 374, the rib 373 of the varying hook is removed from the guide groove 352 of the fixed hook 350 And then passes over the stop jaw 353.

The rib 373 and the inclined surface 374 of the fluctuating hook slide up and rotate along the guiding surface 364a of the variable shaft portion 360 so that the inclined surface 374 of the rib 373 is fixed And is placed on the second projection retention surface 355 of the hook 350.

In addition, when the external force F is removed from the saddle, the saddle and the variable shaft portion 360 are moved upward as they pop up through the resultant force of the elastic force to return to the original upper position.

The rib 373 and the inclined surface 374 of the changing hook are slidably raised and rotated along the second projection retention surface 355 of the fixing hook 350 by using the stored elastic force of the inner spring 320 And reaches the guide hole 351a.

As a result, since the inclined surface 374 of the rib 373 of the change hook receives the resultant force of the elastic force, it moves upward along the guide hole 351a, and then returns to the original upper position.

12 to 14 are repeated so that only the elastic force of the external spring 310 or the external spring 310 is used while the two-step vertical movement, i.e., the floating hook is located at the upper position or the lower position of the fixed hook 350, The movement of elastically supporting the variable shaft portion can be regularly performed by using the resultant force of the elastic force of the inner spring 310 and the inner spring 320.

Second Embodiment

The fitness riding bicycle of the present invention described in this embodiment can be the same as or very similar to the first embodiment except that the joint portion and the lower handle are removed. Therefore, the same or corresponding components in FIGS. 1 to 16 will be given the same or similar reference numerals, and a description thereof will be omitted here.

FIG. 15 is a side view of a fitness type riding bicycle according to a second embodiment of the present invention, and FIG. 16 is a perspective view of the handlebar shown in FIG.

Referring to FIG. 15, the bicycle frame 100 is provided with a down tube 105 in which a joint portion similar to that of the first embodiment is removed, and an end of the down tube 105 is directly connected to the pedal shaft hub 104.

In addition, since the end of the down tube 105 is directly connected to the pedal shaft hub 104, even if the fitness type riding bicycle falls from a high position, Can be secured.

The rear shock absorbing shock absorber 140 is detached from the post mounting portion 113 and is positioned on the seat stay 107 side using the lower bracket 109 of the seat stay 107.

In this case, the seesaw motion in which the cushion frame 110 can rotate relatively more freely in the hinge 108 of the down tube 105 than in the first embodiment can be realized.

Referring to FIG. 16, the handle bar 400 is different from the first embodiment in that a lower handle is provided. That is, the handle bar 400 of the second embodiment includes a first-stage handle 410 horizontally extended on both sides of the stem 401, and a second handle 405 extending upwardly from both sides of the first- Stage handle 420 and a three-stage handle 430 extending outwardly in the lateral direction of the two-stage handle 420. The three-stage handle 430 may be a two-stage handle.

Here, the lower handle may induce the user's body to be excessively tilted forward, and in this case, the user such as the elderly person or the infant may feel inconvenience in exercising.

Therefore, in the second embodiment, the inconvenience of using the handlebar 400 for a specific user can be solved.

100: Bicycle frame 200: Pedal driving part
300: Variability elasticity module 310, 310a, 310b: outer spring
320, 320a, 320b: inner spring 330:
340: Lower Junction District 350: Fixing Hook
360: Variable Axis 370: Variable Axis
380: Pusher 390: Upper district
400: handlebar 500: saddle

Claims (10)

A bicycle frame rotatably coupled to the front wheel and the rear wheel;
A pedal driver for rotating the rear wheel with a pedal coupled to the bicycle frame;
A saddle disposed on an upper side of a module post of the bicycle frame;
A saddle which is connected between the bicycle frame and the saddle and selectively applies the combined force of the external spring and the internal spring or the elastic force of the external spring to the saddle so as to perform the two- A variable elasticity module capable of replacing the inner spring;
A lower seating block connecting the module posts of the bicycle frame and the modulus expansion and contraction module to each other; And
And a top seating block connecting the sway rails of the saddle to each other,
The volatility extensible /
A lower jig coupled to a lower seating block at an upper portion of the module post;
An upper abutment zone coupled to an upper abutment block at the bottom of the saddle;
Said outer spring being disposed between said lower jar and said upper jar;
A hollow tube-shaped module main body detachably coupled to a screw hole on the upper surface of the lower housing;
Said inner spring seated on the bottom of said screw hole of said lower jar;
A pusher supported by the inner spring within the module body; And
And a fixing hook fixed to an inner surface of the module main body.
delete delete delete delete delete The method according to claim 1,
In the fixed hook of the modulus of elasticity expansion / contraction module,
The plurality of guide holes and the plurality of guide grooves extend in the longitudinal direction of the fixing hooks, respectively, and are arranged alternately along the circumferential direction of the fixing hooks,
Wherein the guide groove has a groove depth that is relatively smaller than a depth of the guide hole.
8. The method of claim 7,
The volatility extensible /
Further comprising a variable shaft portion inserted inside the fixed hook and having a rod protruded to the outside of the module body,
The variable-
A knob defining a cylindrical sidewall between the open bottom and the closed top,
The rod extending upward from the closed top of the knob and protruding out of the module body and threaded into a threaded hole in the bottom surface of the top shell,
The knob
A plurality of guide protrusions formed on an outer circumferential surface of the knob to be slidably inserted into the guide hole and the guide groove; And
And a V-shaped guide surface formed on the bottom surface of the side wall of the knob in a number corresponding to the guide protrusion along the circumferential direction.
9. The method of claim 8,
The volatility extensible /
Further comprising a change spurt disposed between the variable shaft portion and the pusher and moving up and down in the fixed spigot or rotating outside the fixed spigot or stopped at a stop of the fixed spigot,
The change gear
A gear shaft inserted into a space inside the side wall of the knob,
A hollow rotary gear having a diameter larger than that of the gear shaft and having a bottom open;
A rib formed on an outer peripheral surface of the hollow rotary gear; And
And an inclined surface formed on an upper end of the rib and contacting the guide surface. 10. The method of claim 9,
The pusher
A disk in contact with the inner spring;
A spring insertion protrusion protruding downward from the bottom of the disk;
A contact protrusion protruded upward from an upper portion of the disc and inserted into the inner space of the hollow rotary gear; And
And a plurality of wedge portions formed on an upper portion of the contact protrusion so as to be in point contact with the ceiling of the inner space of the hollow rotary gear.

Images