KR101674204B1

KR101674204B1 - Automatic starting apparatus using flywheel for small engin

Info

Publication number: KR101674204B1
Application number: KR1020150063204A
Authority: KR
Inventors: 박성영; 주원홍
Original assignee: 공주대학교 산학협력단
Priority date: 2015-05-06
Filing date: 2015-05-06
Publication date: 2016-11-08

Abstract

The present invention relates to a starting device using a flywheel, which stores a part of rotary force by a rope reel, and provides the rotary force for the rotary force again to uniformly rotate the rope reel and maintain the rotation of the rope reel, comprising: a housing fixed to a crank shaft in an adjacent state; the rope reel installed on the housing to be able to rotate to provide rotary force; a rope which is coupled to the rope reel in a wound state, and includes a handle grip to rotate the rope reel by pulling the handle grip; a ratchet which is coupled to the rope reel to rotate with the rope reel, and is locked by the crank shaft to transfer the rotary force of the rope reel to the crank shaft; a returner which is compressed by the rotary force of the rope reel to accumulate elastic force, and restores the rope reel and the rope to their original states; and a flywheel module which stores the rotary force of the rope reel in a state of being connected to the rope reel, and provides rotational inertia by the stored rotary force for the rope reel.

Description

TECHNICAL FIELD [0001] The present invention relates to a starter for a small engine using a flywheel,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a starter for a small engine, in which a part of rotational force by a rope reel is stored in a flywheel and is then provided to a rope reel to thereby enable uniform rotation of the rope reel, To a starting device.

Generally, small-sized engine-equipped devices such as docking type farm machinery of 50cc or less class, leisure sport equipment such as RC car and RC helicopter, and motor boat driving motor are usually equipped with a Recoil Starter There is a starter that is called.

Such a recoil starter starts the small engine through the rotational force generated on the rope reel, which is wound on the rope reel as is well known.

More specifically, the recoil starter is provided with a ratchet device for transmitting the rotational force of the rope reel to the crankshaft of the small engine, and is locked to the crankshaft through the ratchet device of the rope reel to rotate the crankshaft, After starting, it is unlocked in the crankshaft and then restored to its original state by reverse rotation of the rope reel.

Here, the recoil starter is provided with a restoring member for restoring the rope reel to its original state.

The restoring member restores the rope and the rope reel by rotating the rope reel reversely through the accumulated rotational force after starting the small engine after the rope reel accumulates the rotational force in accordance with the forward rotation of the small engine.

However, the conventional recoil starter has a problem that the rotation of the crankshaft is varied in accordance with the stroke cycle of the small engine while rotating the crankshaft, so that the rotation of the rope reel is uneven, and furthermore, the rotation of the rope reel can not be continued .

For example, a recoil starter proposed in Korean Patent No. 10-1217391 or Korean Patent Laid-Open Publication No. 10-2014-0009187 discloses a configuration in which the rotational force of a rope reel is transmitted to a drive pulley of an engine through a ratchet member, There is only a constitution in which the rope reel is uniformly rotated or the configuration for continuing the rotation of the rope reel is lacking.

In addition, in the conventional recoil starter, since the elastic member constituting the restoring member is directly connected to the rope reel, stress is directly applied to the fixing portion of the elastic member during rotation of the rope reel, If the fixed part is broken, the entire rope reel must be replaced.

Korean Patent No. 10-1217391 Korean Patent Publication No. 10-2014-0009187

SUMMARY OF THE INVENTION The present invention has been made in order to solve the problems of the conventional art as described above, and it is an object of the present invention to provide a rope reel in which a part of rotational force of a rope reel for rotating a crankshaft is stored, And it is an object of the present invention to provide a starter for a small engine that uses a flywheel capable of continuing rotation of a rope reel as well as rotation thereof.

More specifically, the present invention relates to a small-sized engine using a flywheel capable of continuously rotating and uniformly rotating the rope reel through rotational inertia by the centrifugal force of the flywheel, while retaining the rotational force of the rope reel via centrifugal force, It is an object to provide a starter.

Another object of the present invention is to provide a starter for a small engine using a flywheel capable of increasing the centrifugal force generated in the flywheel by biasing the weight of the flywheel to the outside as the flywheel rotates.

Another object of the present invention is to provide a starter for a small engine which can prevent breakage of a rope reel by connecting an elastic member for providing a restoring force to the rope reel through a connecting member without directly connecting the rope reel to the rope reel .

In order to accomplish the above object, according to the present invention, there is provided a starter for a small engine using a flywheel, the starter comprising: a housing fixed to the crankshaft in an adjacent state; A rope reel rotatably installed in the housing to provide a rotating force; A rope which is coupled to the rope reel in a state of being rolled and has a knob to rotate the rope reel by pulling the knob; A ratchet coupled to the rope reel to rotate together with the rope reel and to be locked to the crank shaft to transmit rotational force of the rope reel to the crankshaft; A retractor which is compressed by the rotational force of the rope reel to accumulate an elastic force and restores the rope reel and the rope to their original state through an accumulated elastic force; And a flywheel module that stores the rotational force of the rope reel in a state of being connected to the rope reel and provides the rotational inertia by the stored rotational force to the rope reel.

For example, the flywheel module may include a flywheel module rotatably installed in the housing, rotated by the rope reel, formed in a disk shape having a weight, to generate a centrifugal force through a rotational force of the rope reel, A flywheel provided on the rope reel; And a power transmitting member for transmitting rotational force of the rope reel to the flywheel while connecting the flywheel and the rope reel or transmitting rotational inertia of the flywheel to the rope reel.

Here, the power transmitting member is rotatably coupled to the housing, one side of the power transmitting member is engaged with a rotary shaft of the rope reel, the other side of the power transmitting member is engaged with a rotary shaft of the flywheel, And a gear train.

It is preferable that the gear train has a gear ratio that increases the number of revolutions of the rope reel relative to the number of revolutions of the flywheel while transmitting the rotational force of the flywheel to the rope reel.

Further, the flywheel module may further include a centrifugal force increasing unit provided in the flywheel, which increases the centrifugal force of the flywheel by biasing the weight of the flywheel to the outside according to the rotation of the flywheel.

For example, the centrifugal force increasing member may include a guide rail extending from the center of the flywheel toward the outer periphery of the flywheel to provide a moving space, the guide rail having a plurality of radial shapes; A weight slider movably coupled to the guide rail, the weight slider being made of a heavy body and moving to the outer periphery of the flywheel by rotation of the flywheel; And a slider spring provided on the guide rail and providing an elastic force by movement of the weight slider.

The above-mentioned retractor includes a spur gear provided on a rotary shaft of the rope reel, rotated together with the rope reel, and formed with a plurality of teeth along the periphery thereof; An elastic member which is fixed at the other end to the housing and is compressed by rotation of the spur gear to provide an elastic force while one end is connected to the spur gear; And a connecting member for fixing one end of the elastic member while forming an engagement portion of the elastic member in a state engaged with the spur gear and rotating the one end of the elastic member while rotating by the spur gear, A starter for a small engine using a flywheel.

For example, the connecting member may include an internal gear rotating shaft which is fixed to the housing while being adjacent to the spur gear, and which forms an engaging portion of the elastic member; A spur gear rotatably coupled to the internal gear rotating shaft and formed in a circular arc shape about the internal gear rotating shaft and rotatably receiving the spur gear, An internal gear rotated about the rotation axis of the internal gear by rotation of the spur gear; And a spring holder which is formed in a groove shape in the internal gear to accommodate one end portion of the elastic member while providing an engagement portion of the internal gear rotation shaft and rotates the one end portion of the elastic member by rotation of the internal gear Lt; / RTI >

According to the starter for a small engine using the flywheel according to the present invention, since the flywheel constituting the flywheel module transmits rotational inertia by the centrifugal force to the rope reel while the rotational force by the rope reel is stored by the centrifugal force, The rotation of the rope reel can be continued and the starting performance of the engine can be improved.

Further, since the power transmitting member for connecting the flywheel and the rope reel is constituted by a gear train and is constituted by a gear ratio for increasing the number of revolutions of the rope reel relative to the number of revolutions of the flywheel, the rotational inertia of the flywheel is more smoothly transmitted to the rope reel As shown in FIG.

Further, since the weight slider is coupled to the guide rail constituting the centrifugal force increasing member and moved to the outer periphery by rotation of the flywheel, the centrifugal force of the flywheel increases as the weight is concentrated on the outer periphery of the flywheel, .

Further, according to the present invention, as the one end of the elastic member constituting the retainer is not directly compressed by the rope reel but is compressed by the connecting member, the stress caused by the elastic member is not directly applied to the rope reel, In particular, since the spring holder is formed on the internal gear of the connecting member to fix the one end of the elastic member, it is possible to replace the internal gear so that the replacement of the entire rope reel is not necessary, The cost can be reduced.

1 is a perspective view showing a starter for a small engine according to the present invention;
2 is an exploded perspective view showing a starter for a small engine according to the present invention.
3 is a side view showing the rope reel of the present invention.
4 is a configuration diagram showing a rope reel and a flywheel module according to the present invention;
5 is a configuration diagram showing a centrifugal force increasing member according to the present invention;
6 is an enlarged view showing an internal gear of the present invention.
7 is a front view showing the retiner of the present invention.
8 is a front view showing an operating state of the retractor shown in Fig. 7; Fig.

Hereinafter, embodiments of the present invention will be described in more detail with reference to the accompanying drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted.

Embodiments in accordance with the concepts of the present invention can make various changes and have various forms, so that specific embodiments are illustrated in the drawings and described in detail in this specification or application. It is to be understood, however, that it is not intended to limit the embodiments according to the concepts of the present invention to the particular forms of disclosure, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between. Other expressions that describe the relationship between components, such as "between" and "between" or "neighboring to" and "directly adjacent to" should be interpreted as well.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, the terms "comprises ", or" having ", or the like, specify that there is a stated feature, number, step, operation, , Steps, operations, components, parts, or combinations thereof, as a matter of principle.

The starting device for a small engine according to the present invention includes a housing 100, a rope reel 200, a rope 300, a ratchet 400, a retractor 500, and a flywheel module 600 ). &Lt; / RTI >

The housing 100 is a member for accommodating a component to be described later, which is formed in a body, and is formed in a state of being adjacent to a crankshaft of a small engine, not shown,

2, the housing 100 accommodates a rope reel 200, a ratchet 400 and a retractor 500, which will be described later, and a flywheel module 600, which will be described later, is accommodated in the housing 100 .

The housing 100 faces the crankshaft of the small engine through the opening while being fixed to a small agricultural machine, a leisure mechanism or the like.

In addition, the housing 100 is formed with a draw-out hole 110 through which a rope 300 to be described later is drawn out.

2, the housing 100 includes a shaft hole 150 to which a rotary shaft of a rope reel 200 is coupled, an internal gear rotation shaft 531 to which an internal gear 532 to be described later is rotatably engaged, A housing protrusion 533a to which the other end 523 of the elastic member 520 is fixed and a wheel rotation shaft 611a to which a flywheel 610 described later is coupled.

1 and 2, the housing 100 may be formed as a long elongated shape to accommodate a flywheel 610 described later. The housing 100 may be formed in a circular shape as shown in FIG. 1 and FIG. 2 and may include a flywheel 610 It may be rotatably received.

2, the rope reel 200 is rotatably installed in the shaft hole 150 of the housing 100 to form a rope 300, The crank shaft is rotated through the ratchet 400 described later to start the engine.

The rope reel 200 receives a rotational inertia force of the flywheel 610 while storing part of the rotational force in the flywheel 610, which will be described later, while accumulating a part of the rotational force through the retractor 500 described later.

As shown in FIG. 3, the rope reel 200 includes a rope track 210 having a spiral groove shape along the outer circumferential surface thereof to provide a winding portion of the rope 300.

The rope 300 is a component for applying a rotational force to the rope reel 200. The rope reel 200 is wound around the rope track 210 of the rope reel 200 with one end thereof fixed to the rope reel 200, The other end is drawn out by the hole 110 and the rope reel 200 is rotated as the handle 310 provided at the other end is pulled.

The rope 300 may be made of, for example, cotton, hemp, or synthetic fiber, and may be formed of a wire formed by twisting a steel wire with a core to increase the strength.

Here, the rope track 210 of the rope reel 200 may be formed so that the outer diameter gradually decreases from the side of the handle 310 of the rope 300 toward the end side, unlike the illustrated example. That is, since the outer diameter of the rope track 210 on the side of the handle 310 is the largest, a large rotational force can be obtained even with a small force, and since the outer diameter of the end side of the rope 300 is the smallest, A large number of revolutions can be obtained.

Therefore, when the outer diameter of the rope reel 200 becomes narrower, the rope reel 200 smoothly rotates by the pulling of the rope 300, even with a small force at the beginning of the starting operation, The small engine can be easily started.

The ratchet 400 is a component that is coupled to the rope reel 200 and transfers the rotational force of the rope reel 200 to the unshown crankshaft or is separated from the crankshaft after starting.

Specifically, the ratchet 400 is coupled to the front of the rope reel 200 as shown in FIGS. 1 and 2, and is locked with the crankshaft while rotating in parallel with the rope reel 200 to start the small engine, Locked with the rope reel 200 after being unlocked in the crankshaft.

Such a ratchet 400 may be applied to a configuration applied to a conventional recoil starter.

For example, the ratchet 400 may include a pair of extension protrusions 410 coupled to the rope reel 200 as shown in FIG. 2, and the extension protrusion 410 may be rotated by the rotation of the rope reel 200, Respectively, so as to be locked while being caught by the crankshaft.

Alternatively, the ratchet 400 may be configured to have a slider structure that protrudes forward of the rope reel 200 by rotation of the rope reel 200, and is locked while being caught by the crank shaft through the protrusion of the slider.

Here, the detailed configuration of the ratchet 400 is well known in the art to which the present invention belongs, and therefore, detailed description thereof will be omitted.

The retractor 500 is a component for restoring the rope reel 200 and the rope 300 after the start of the engine by restoring the elastic force through the rotational force of the rope reel 200.

For example, the retractor 500 may include a spur gear 510, an elastic member 520, and a connecting member 530 as shown in FIG.

2, the spur gear 510 is formed on the rotating shaft of the rope reel 200 while forming a spur gear through a plurality of teeth formed along the periphery thereof. The spur gear 510 is fixed to the housing 100 Is coupled with the rope reel (200) to rotate with the rope reel (200).

The elastic member 520 accumulates the elastic force while being compressed by the rotation of the spur gear 510 rotating together with the rope reel 200 and rotates the spur gear 510 in the reverse direction through the elastic force after starting the engine, 200 and the rope 300 to their original state.

The other end portion 523 of the elastic member 520 is fixed to the housing 100 with one end portion 522 connected to the spur gear 510 through a connecting member 530 to be described later, And one end portion 522 is moved by the rotation of the spur gear 510 to elastically compress and accumulate the rotational force of the rope reel 200.

The elastic member 520 may be constituted by, for example, a torsion spring as shown in Fig.

The torsion spring has a circular shape and is engaged with the internal gear rotating shaft 531 through the winding rotating shaft 521 so that the one end 522 is fixed to the spring holder 533 to be described later to constitute the free end, 523 are fixed to the housing protrusion 533a protruding from the housing 100 and are compressed by the rotation of the internal gear 532 and the spring holder 533 to be described later.

The connecting member 530 connects the spur gear 510 and the elastic member 520 while connecting the elastic member 520. The spur gear 510 is engaged with the spur gear 510, And one end portion 522 of the elastic member 520 is rotated to elastically compress the elastic member.

The connecting member 530 may include an internal gear rotating shaft 531, an internal gear 532, and a spring holder 533, for example, as shown in FIG.

The internal gear rotating shaft 531 constitutes a coupling portion between the internal gear 532 and the elastic member 520 to be described later and is in a state adjacent to the shaft hole 150 to which the spur gear 510 is coupled And is protruded from the housing 100.

The internal gear 532 is rotatably coupled to the internal gear rotating shaft 531 as shown in FIG. 6 and FIG. 7 so as to be engaged with the spur gear 510 in an inscribed state so as to rotate the internal gear 532 in accordance with the rotation of the spur gear 510, And rotates around the rotating shaft 531. [

6 and 7, the internal gear 532 is formed with an arc-shaped slot 532a passing through the internal gear rotating shaft 531 and rotatably receiving the spur gear 510 And the spur gear 510 is engaged with the spur gear 510 in an inscribed state through the teeth formed along the slot 532a and is rotated about the internal gear rotating shaft 531 by the rotation of the spur gear 510.

7, the internal gear 532 is guided by the rotation shaft of the rope reel 200, and the guide rail 532b is formed through the slot 532a to guide the rotation of the guide rail 532b.

6, the spring holder 533 is formed as an identical groove in a part of the internal gear 532 to receive the internal gear rotating shaft 531 and a part of the elastic member 520, as shown in Fig. 6 and Fig. 7 Is an element for rotating and compressing the one end portion 522 of the elastic member 520 by the rotation of the internal gear 532 as shown in Fig.

Specifically, the spring holder 533 is formed as a groove for receiving the winding rotation axis 521 and the one end portion 522 of the torsion spring constituting the elastic member 520, and provides a joint portion of the internal gear rotation axis 531 , And rotates the one end portion 522 of the elastic member 520 when the internal gear 532 rotates as shown in Fig.

7, the one end portion 522 is fixed to the spring holder 533 of the internal gear 532 without being fixed directly to the rope reel 200, 523 are fixed to the housing protrusion 533a and elastically compressed while being pressed through a spring holder 533 rotating together with the internal gear 532 by the rotation of the rope reel 200 and the spur gear 510, The internal gear 532 is rotated in the reverse direction through the elastic force accumulated after the start of the engine to return the rope reel 200.

The elastic member 520 may be a plate spring bent in a V shape, unlike the one shown in the drawing, and the other end may be fixed to the housing protrusion 533a while one end of the elastic member 520 is received in the spring holder 533.

The elastic member 520 is formed of a spiral wound spring and one end of the outer frame is fixed to the spring holder 533 to form a free end and the other end of the center is fixed to the internal gear rotation shaft 531, And one end of the internal gear 532 may rotate together with the spring holder 533 and be compressed while being tightened as the internal gear 532 rotates.

The flywheel module 600 provides a rotational inertia to the rope reel 200 by a stored rotational force while storing part of the rotational force of the rope reel 200 to uniformly rotate the rope reel 200, Is a component that makes it more sustainable.

This flywheel module 600 may be configured to include a flywheel 610 and a power transmitting member 620 as shown in FIG.

2, the flywheel 610 is rotatably installed on the wheel rotating shaft 611a of the housing 100 and is connected to the rope reel 620 via a power transmission member 620, The centrifugal force is generated while rotating by the rotational force of the rotor 200, and the rotational inertia due to the centrifugal force is transmitted to the rope reel 200 again.

That is, the flywheel 610 is a component that temporarily keeps the rotational energy as it is applied to an ordinary automobile and then discharges it again, while continuing the rotation while maintaining a uniform rotation of the crankshaft.

Unlike the flywheel 610, the outer periphery of the flywheel 610 may be thickened to more smoothly generate centrifugal force.

The power transmitting member 620 transmits the rotating force of the rope reel 200 to the flywheel 610 while the flywheel 610 and the rope reel 200 are connected to each other, To the reel (200).

The power transmitting member 620 may be configured as a gear train having a gear ratio set as shown in Figs.

Specifically, the gear train is engaged with the rotation shaft of the rope reel 200, that is, the spur gear 510 described above, and is engaged with the rotation shaft 611 of the flywheel 610 while being rotatably coupled to the housing 100 And transmits rotational force to each other while interlocking.

The gear train may be configured to have a set gear ratio. For example, the gear train may be configured to transmit the rotational force of the flywheel 610 to the rope reel 200 while increasing the gear ratio of the rope reel 200 to the rotational speed of the flywheel 610 .

Meanwhile, the flywheel module 600 of the present invention may further include a centrifugal force increasing member 630 as shown in FIG.

The centrifugal force increasing member 630 is a component that increases the centrifugal force of the flywheel 610 by biasing the weight of the flywheel 610 outward.

The centrifugal force increasing member 630 may include a guide rail 631, a weight slider 632, and a slider spring 633 as shown in FIG.

5, the guide rail 631 extends from the center of the flywheel 610 to the outer periphery of the flywheel 610 and forms a groove, as shown in FIG. 5. The guide rail 631 guides the weight slider 632, And forms a plurality of weight sliders 632 in a radial direction.

The weight slider 632 is composed of a weight and is movably coupled to each of the guide rails 631 and moves toward the outer side of the guide rail 631 by the rotation of the flywheel 610.

That is, since the weight slider 632 moves to the outer periphery of the guide rail 631 by rotation of the flywheel 610, the weight of the weight slider 632 is concentrated to the outer periphery, and the centrifugal force increases.

5, each of the slider springs 633 is fixed to the center of the flywheel 610, and the other end is fixed to the weight slider 632, The weight slider 632 is returned to its original position after rotation of the flywheel 610 while providing an elastic force by the movement of the slider 632. [

The operation and operation of the present invention including the above-described components will be described.

At start-up of the small engine, the user pulls the handle 310 of the rope 300 to rotate the rope reel 200.

At this time, the flywheel 610 rotates by the rotational force of the rope reel 200 transmitted through the gear train constituting the power transmitting member 620 to generate centrifugal force, and the rotational inertial force by centrifugal force is transmitted to the rope reel 200 .

Here, the flywheel 610 transmits the increased centrifugal force to the rope reel 200 as the weight slider 632 moves to the outer periphery of the guide rail 631 in the process of rotating, and the gear ratio of the gear train is transmitted to the rope reel 200 So that the rotation of the rope reel 200 is smoothly accelerated.

As the rope reel 200 rotates, the ratchet 400 rotates the crank shaft through the rotational force of the rope reel 200 to start the engine while being locked to the crankshaft of the engine, and is separated from the crankshaft after the start of the engine.

At this time, the crankshaft starts the engine while uniformly rotating as the rotational force of the flywheel 610 is continuously transmitted to the rope reel 200 while performing a starting stroke of the engine.

The spur gear 510 constituting the retractor 500 rotates the internal gear 532 and the spring holder 533 while rotating together with the rope reel 200 on the other side of the ratchet 400, The one end portion 522 is compressed while rotating by the spring holder 533 to accumulate the elastic force.

Then, after starting the engine, the elastic member 520 reversely rotates the spring holder 533 and the internal gear 532 through the elastic force.

Thus, the rope reel 200 is returned together with the rope 300 while being reversely rotated by the internal gear 532 and the spur gear 510.

As described above, in the starter for a small engine using the flywheel according to the present invention, when the flywheel 610 constituting the flywheel module 600 stores the rotational force of the rope reel 200 by the centrifugal force, As the inertia is transmitted to the rope reel 200, the rope reel 200 can be rotated uniformly, and the rotation of the rope reel 200 can be continued for a longer time, thereby improving the starting performance of the engine.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It will be apparent to those skilled in the art that various changes, substitutions, and alterations can be made therein without departing from the spirit of the invention.

100: housing 110:
200: rope reel 210: rope track
300: Rope 310: Handle
400: ratchet 410: extension projection
500: Retainer 510: Spur gear
520: elastic member
521: coil part 522: one end part
523: the other end portion 524:
530:
531: Internal gear rotating shaft 532: Internal gear
532a: Slot 533: Spring holder
533a: housing projection
600: Flywheel module 610: Flywheel
620: power transmitting member 630: centrifugal force increasing member
631: Guide rail 632: Weight slider
633: Slider spring

Claims

A starting device for starting a small engine by rotating a crankshaft of a small engine,
A housing fixed adjacent to the crankshaft;
A rope reel rotatably installed in the housing to provide a rotating force;
A rope which is coupled to the rope reel in a state of being rolled and has a knob to rotate the rope reel by pulling the knob;
A ratchet coupled to the rope reel to rotate together with the rope reel and to be locked to the crank shaft to transmit rotational force of the rope reel to the crankshaft;
A retractor which is compressed by the rotational force of the rope reel to accumulate an elastic force and restores the rope reel and the rope to their original state through an accumulated elastic force; And
And a flywheel module that stores the rotational force of the rope reel in a state of being connected to the rope reel and provides rotation inertia to the rope reel by the stored rotational force,
The retractor includes:
A spur gear provided on a rotary shaft of the rope reel, rotated together with the rope reel, and having a plurality of teeth formed along the periphery thereof;
An elastic member which is fixed at the other end to the housing and is compressed by rotation of the spur gear to provide an elastic force while one end is connected to the spur gear; And
And a connecting member for fixing one end of the elastic member while forming an engagement portion of the elastic member while being engaged with the spur gear and rotating the one end of the elastic member while rotating by the spur gear,
The connecting member includes:
An internal gear rotating shaft fixed to the housing while being in a state adjacent to the spur gear and forming an engagement portion of the elastic member;
A spur gear rotatably coupled to the internal gear rotating shaft and formed in a circular arc shape about the internal gear rotating shaft and rotatably receiving the spur gear, An internal gear rotated about the rotation axis of the internal gear by rotation of the spur gear; And
And a spring holder which is formed in a groove shape in the internal gear to accommodate one end portion of the elastic member while providing an engagement portion of the internal gear rotation shaft and rotates the one end portion of the elastic member by rotation of the internal gear A starter for a small engine using a flywheel.

The method according to claim 1,
Wherein the flywheel module comprises:
A flywheel which is rotatably installed in the housing and rotates by the rope reel and is formed in the shape of a disk having a weight so as to generate a centrifugal force through a rotational force of the rope reel and to provide rotary inertia by centrifugal force to the rope reel; And
And a power transmitting member for transmitting rotational force of the rope reel to the flywheel while transmitting the flywheel to the rope reel or transmitting rotational inertia of the flywheel to the rope reel.

The method of claim 2,
The power transmitting member includes:
And a gear train having one side engaged with the rotation shaft of the rope reel while being rotatably coupled to the housing and the other side engaged with the rotation shaft of the flywheel to transmit rotational force between the rope reel and the flywheel, A starter for a small engine using a flywheel.

The method of claim 3,
The gear train includes:
And a gear ratio that increases the number of revolutions of the rope reel relative to the number of revolutions of the flywheel while transmitting the rotational force of the flywheel to the rope reel.

The method of claim 2,
Wherein the flywheel module comprises:
Further comprising a centrifugal force increasing unit provided in the flywheel for increasing the centrifugal force of the flywheel by biasing the weight of the flywheel to the outside in accordance with rotation of the flywheel.

The method of claim 5,
The centrifugal force increasing member
A guide rail extending from the center of the flywheel toward the outer periphery of the flywheel to provide a moving space and having a plurality of radial shapes;
A weight slider movably coupled to the guide rail, the weight slider being made of a heavy body and moving to the outer periphery of the flywheel by rotation of the flywheel; And
And a slider spring provided on the guide rail for providing an elastic force by movement of the weight slider.

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