KR20100096555A - Compound bow - Google Patents

Abstract

PURPOSE: A compound bow for increasing propulsion for launching a bow and reducing power for drawing a bowstring is provided to reduce the noise and vibration of a main and secondary pulley by using a damping member. CONSTITUTION: A compound bow comprises a bow main body(100), a rotary shaft(101), a dual pulley, a balance cable(141), a stopper(160), a cable(143), a driven pulley(190) and a bow string(142). The rotary shaft is fixed to one side end of the bow main body. The dual pulley has a main part and secondary pulleys(110,120). The secondary pulley is installed at the rotary shaft to rotate. The both end of the balance cable is fixed to the main part and the secondary pulley. The balance cable is wound in the main part and the secondary pulley in the same direction. A cam cable has one end fixed to the main pulley and the other end fixed to the end part of the main body.

Description

Compound Bow {COMPOUND BOW}

The present invention relates to a compound bow, and more particularly, when the bowstring is pulled, the radial force is mainly applied to the auxiliary pulley having a large radius, thereby reducing the pulling force, and the radius when the bowstring is returned to its original state so that the arrow can be fired. This small main pulley is primarily concerned with compound bows that allow the force of the arrow to be improved by the application of force.

In general, compound bows use cam or wheel effects to make them easier to pull without pulling, and increase the force fired at launch. It can be used mainly for hunting.

In the conventional compound bow, as shown in FIGS. 1 and 2, a handle 10 made of aluminum is coupled to an upper wing 20 at an upper portion thereof, and a lower wing 26 is coupled to a lower portion thereof. Incisions 21 and 27 are formed at each end 22 and 28 of the upper blade 20 and the lower blade 26, and a cam is formed as an eccentric shaft 70 between the incisions 21 and 27. It is rotatably installed.

The cam is composed of an upper cam 30 and a lower cam 36, and a bowstring 50 is connected between the upper cam 30 and the end 28 of the lower wing 26 and the lower cams 30 and 36. do. The first cable 40 and the second cable 46 cross each other.

The cable guide 60 is installed in the transverse direction at one side of the central portion of the handle 10, and the glide 66 is movable on the cable guide 60 and the bow string 50 is inserted into the cable guide 60. Is installed.

The glide 66 is a device for pushing the first and second cables 40 and 46 in one direction. If the first and second cables 40 and 46 are not pushed in one direction, the first and second cables 40 and 46 may hit the first and second cables 40 and 46 when the bow is shot.

The compound bow of the conventional structure configured as described above winds the first and second cables 40 and 46 while the upper and lower cams 30 and 36 having the eccentric shaft 70 rotate when the bow string 50 is pulled. At the same time, the upper blade 20 and the lower blade 26 are bent, and the glide 66 is moved toward the end of the cable guide 60. At this time, the upper and lower cams 30 and 36 are distorted.

That is, as shown in Figure 2, the upper cam 30 is coupled to the end 22 of the upper blade 20 by the eccentric shaft 70, one end of the bow string 50, the upper cam 30 The first cable 40 is coupled to the small diameter groove 32 of the upper cam 30 and the end 28 of the sump blade 26, respectively, the lower cam ( 36 is coupled to the end 28 of the lower wing 26 by the eccentric shaft 70, the other end of the bowstring 50 is coupled to the large diameter groove 37 of the lower cam 36, the second The cable 46 is coupled to the small diameter groove 38 of the lower cam 36 and the end 22 of the upper blade 20.

Accordingly, when the bow string 50 is pulled, the upper and lower cams 30 and 36 rotate about the eccentric shaft 70, and the largest diameter portion is passed about the eccentric shaft 70 through the vertical state. When pulled and released, the arrow gains a strong thrust by the momentary strong elastic force.

However, the compound bow of the conventional structure as described above has the bowstring 50 when the sizes of the large diameter grooves 31 and 37 and the small diameter grooves 32 and 38 of the upper cam 30 and the lower cam 36 are determined. There is a limit to increase the propulsion force that the arrow is fired while reducing the force required to pull.

An object of the present invention devised in view of the above point is to provide a compound bow to reduce the force required to pull the bow string of the compound bow, and at the same time the propulsion force to shoot the arrow can be improved.

In addition, another object of the present invention is to provide a compound bow to reduce the vibration and noise generated from the main pulley and the auxiliary pulley while operating the compound bow by mounting the dust-proof member on the main pulley and the auxiliary pulley.

Compound bow for achieving the object of the present invention as described above is the user grip the hand with a bow body having an elastic force; A rotating shaft fixed to one end of the bow body; A dual pulley comprising a main pulley rotatably mounted to the rotating shaft and an auxiliary pulley rotatably mounted to the rotating shaft with a larger radius than the main pulley; A cam mounted to the main pulley; A stop pin mounted to the auxiliary pulley such that the auxiliary pulley is in contact with the bow body when the auxiliary pulley is rotated by a predetermined angle so that the auxiliary pulley is not rotated any more and only the main pulley is rotated; A balance cable fixed at both ends of the main pulley and the auxiliary pulley and wound in the same direction to the main pulley and the auxiliary pulley; A hook ring mounted at a position close to the main pulley side at an intermediate point of the balance cable; A stopper on which a pulley wound around the balance cable is formed on one side and the locking ring is temporarily fixed from the state in which the arrow is pulled to the moment of firing; A cam cable having one side fixed to the other end of the bow body and the other side fixed to the main pulley and wound in the same direction as the balance cable to the cam; A driven pulley rotatably fixed to the other end of the bow body; A bowstring, one end of which is connected to the stopper and wound on the driven pulley, the other end of which is wound on the cam pull in the opposite direction to the cam cable; .

Preferably, the stopper is a housing that is connected to the bowstring on one side, the pulley is rotatably mounted on the middle portion and the protrusion formed on the other side protruding by a predetermined length; A locking rod rotatably fixed to the protrusion and protruding so that the locking ring can be temporarily fixed, and a contact surface having a contact surface to which the locking ring contacts is formed so as to control a rotation with a ring portion formed of an inclined surface; A first torsion spring for urging the latch so that the hook portion can be rotated in a direction away from the hook; A detent rotatably mounted to the protruding portion and having a catching jaw for temporarily contacting with a catching portion of the catch and controlling a rotation of the catch and a handle pin protruding out of the housing; And a second torsion spring for pressing the detent in a direction in which the locking portion is supported on the locking jaw. .

Preferably, the handle pin of the detent further includes a release wire connected to the cam cable at one side so that the detent ring can be released as the detent is rotated by shooting the arrow.

Preferably, a guide groove is formed in the outer circumferential surface of the main pulley, the auxiliary pulley and the driven pulley so that the balance cable or the bow string can be wound, and the auxiliary pulley can prevent the cam cable from being separated. A separation prevention part protruding by a predetermined height along the guide groove is provided.

Preferably, the main pulley, the auxiliary pulley and the driven pulley further includes a dustproof member made of a rubber material to prevent noise or vibration generated during operation.

Preferably, the dustproof member is formed of an inner dustproof plate fitted in the through hole formed in the main pulley, the auxiliary pulley and the driven pulley.

Preferably, the anti-vibration member is mounted on the main pulley and the driven pulley outer circumferential surface and is attached to a portion where the balance cable or the bow string contact with the pulled bow string returned to its original state. It consists of an outer dustproof plate provided with a guide groove to be guided.

Preferably, the cam is formed of an arc-shaped arcuate portion and the end of the arcuate portion is formed of a steep inclination to form a steep slope so that the other end is closer to the rotation axis, the cam portion or the steep portion and the steep inclination portion A guide groove for guiding the bow string is provided.

Preferably, the stop pin is screwed to a predetermined portion of the stop pin long hole formed in the auxiliary pulley.

Preferably, the auxiliary pulley further includes an interference pin screwed to a predetermined portion of the interference pin long hole formed in the auxiliary pulley, the end of which is moved along the movement hole formed in the main pulley.

Preferably, the stop pin and the interference pin is covered with a dust cover to prevent noise and vibration.

Preferably, the main pulley and the auxiliary pulley are mounted eccentrically to the rotating shaft.

Compound bow is another preferred embodiment of the present invention, the user grips the hand with a bow body having an elastic force; Rotating shafts fixed to both ends of the bow body; Each dual pulley comprising a main pulley rotatably mounted to the rotating shaft and an auxiliary pulley rotatably mounted to the rotating shaft and having a radius greater than that of the main pulley; Each cam mounted to the main pulley; Respective stop pins mounted to the auxiliary pulley such that the auxiliary pulley is in contact with the bow body when the auxiliary pulley is rotated by a predetermined angle so that the auxiliary pulley is not rotated any more and only the main pulley is rotated; Each balance cable fixed to both ends of the main pulley and the auxiliary pulley and wound in the same direction; Respective hooks mounted at positions close to the main pulley at an intermediate point of the balance cable; A respective stopper having a pulley wound around the middle of the balance cable formed on one side and the locking ring temporarily fixed from the state in which the arrow is pulled to the moment of firing; A cam cable connected to one end of the bow main body and the other end fixed to the main pulley and wound on the cam in a direction opposite to the balance cable; And a bowstring having both ends connected to the stopper. .

Preferably, guide outer grooves are formed in the outer circumferential surfaces of the main pulley and the auxiliary pulley to allow the balance cable to be wound, and the auxiliary pulley is provided along the guide groove to prevent the cam cable from being separated. It is provided with a departure prevention portion extending by a height.

Preferably, the main pulley and the auxiliary pulley further includes a dustproof member made of rubber material to prevent noise or vibration generated during operation.

Preferably, the dustproof member is formed of an inner dustproof plate fitted in a through hole formed in the main pulley and the auxiliary pulley.

Preferably, the anti-vibration member is mounted on the outer circumferential surface of the main pulley and is mounted on a portion where the balance cable is in contact with the pulled bow string returned to its original state, and is provided as an outer anti-vibration plate provided with a guide groove for guiding the balance cable. Is done.

Preferably, the cam is formed of an arc-shaped curved portion formed around the axis of rotation and a steep inclined portion that is steeply inclined so that the end is close to the rotary shaft, the curvature and the steep slope is A guide groove for guiding the cam cable is provided.

Preferably, the stop pin is screwed to a predetermined portion of the stop pin long hole formed in the auxiliary pulley.

Preferably, the auxiliary pulley is screwed to a predetermined portion of the interference pin long hole formed in the auxiliary pulley, the end of which is in contact with the interference jaw formed in the main pulley.

Preferably, the stop pin and the interference pin is covered with a dust cover to prevent noise and vibration.

Preferably, the main pulley and the auxiliary pulley are mounted eccentrically to the rotating shaft.

As described above, the compound bow according to the present invention has the effect of reducing the force required when pulling the bow string and improving the performance of the compound bow by improving the driving force when the arrow is fired.

In addition, by mounting the anti-vibration member to the main pulley, auxiliary pulley and driven pulley there is an effect to reduce the vibration and noise generated when the arrow is fired.

Hereinafter, with reference to the accompanying drawings a preferred embodiment of the present invention in more detail as follows.

Figure 3 is a perspective view showing a compound bow as a first embodiment of the present invention, Figures 4 and 5 is an exploded perspective view showing an exploded view of the main pulley, the auxiliary pulley and the cam shown in Figure 3, Figure 6 3 is an exploded perspective view illustrating the disassembled stopper shown in FIG. 3, and FIGS. 7 to 9 are schematic views showing a state in which a compound bow is operated, and FIG. 7 is a schematic view showing a state before the bowstring is pulled. 8 is a state diagram showing a state in which the bow string is pulled by a predetermined length, Figure 9 is a state diagram showing a state in which the bow string is pulled completely.

As shown, the compound bow, which is a first preferred embodiment of the present invention, has a handle portion 102 gripped by a user and a wing 103 formed at both ends of the handle portion 102 and cut off along a central portion thereof. Rotatable body 100 consisting of, and both ends of the bow body 100, that is, the rotating shaft 101 is mounted on the end of the wing, and the rotating shaft 101 is mounted on one end of the bow body 100 is rotatable Dual pulley consisting of a main pulley 110 and a secondary pulley 120 having a larger radius than the main pulley 110 and rotatably mounted on the rotating shaft 101, the main pulley 110 and the auxiliary pulley ( The cam 130 interposed between the 120 and mounted to the main pulley 110, and the stop pin 182 contacting the wing 103 of the bow body 100 when the auxiliary pulley 120 is rotated by a predetermined angle. Both ends are fixed to the main pulley 110 and the auxiliary pulley 120 and the same room as the main pulley 110 and the auxiliary pulley 120. Balance cable 141 is wound around, the hook 151 is mounted at a position close to the main pulley 110 in the middle of the balance cable 141, and is located in the middle of the balance cable 141 Lee 151 is temporarily fixed to the stopper 160, one side is fixed to the end of the wing 103 located on the other side of the bow body, the other side is fixed to the main pulley 110 and the balance cable (cam 130) ( 141, a cam cable 143 wound in the same direction, and a driven pulley 190 rotatably mounted to the rotating shaft 101 mounted at the end of the wing 103 formed on the other side of the bow body 100, One end is connected to the stopper 160 and wound on the driven pulley 190 and the other end is wound on the cam 130 in the opposite direction to the cam cable 143 in a state fixed to the main pulley 110 (bow string ( 142).

The stopper 160 has a connecting portion 162a to which the bow string 142 is connected at one side thereof, and a rotating pin 161a for rotatably supporting the pulley 161 at the middle portion thereof and a predetermined length at the other side thereof. The housing 162 with the protruding protrusion 162b formed therein, the catch 163 rotatably mounted to the rotation pin 163d fixed to the end of the protrusion 162b, and the catch 163 rotate in one direction. The first torsion spring 163c pressurized to be able to press, the detent 164 rotatably mounted to the rotation pin 164d fixed in the middle of the protrusion 162b, and the detent 164 rotate in one direction. It consists of a second torsion spring 164c to pressurize.

The catch 163 is formed in a circular ring shape and is bent so that the hook 151 is temporarily fixed to the hook portion 163a is formed. On the other side of the latch 163 is formed a locking portion 163b protruding to control the rotation. The first torsion spring 163c presses in a direction in which the hook portion 163a is separated from the hook ring 151.

The detent 164 has a circular ring shape in which one side is cut so that the locking jaw 164a on which the locking portion 163b is temporarily supported can be formed on one side. The other side of the detent 164 is formed with a handle pin 164b protruding to the outside of the housing 162. The second torsion spring 164c presses the detent 164 in the direction of maintaining the state in which the locking portion 163b spans the locking jaw 164a.

In addition, the handle pin 164b is automatically connected to the end of the handle pin 164b with the release wire 164c of the cam cable 143 in addition to the user's manual operation, and the bow string 142 is automatically returned to its original state. It can also be configured to operate the handle pin (164b). At this time, the position of the cam cable 143 to which the release wire 164c is connected is fixed between the position in contact with the stopper 160 and the position fixed to the cam 130.

The auxiliary pulley 120 has a plate shape close to an oval shape, and an eccentric through hole 121 is formed in the central area. The outer circumferential surface of the auxiliary pulley 120 is formed with a guide groove 122 recessed to a predetermined depth so that the balance cable 141 can be wound. On one side of the guide groove 122 is protruded by a predetermined height extending along the guide groove 122, the separation preventing portion 127 is formed to prevent the separation of the cam cable 141. In addition, a through hole 123 is formed therein so that the inner dustproof plate 171 to be described later is fitted. And the stop pin long hole 124 and the interference pin long hole 125 forming an arc shape centering on the through hole 121 is formed. The stop pin long hole 124 is screwed with a stop pin 182 is projected to a predetermined height to temporarily contact the wing 103. An interference pin 181 protruding toward the main pulley 110 is screwed into the interference pin long hole 125. The stop pin 182 and the interference pin 181 is made of a screw coupled structure it is possible to adjust the position according to the user's preference. In addition, a fixing protrusion 126 is formed at the end of the guide groove 122 to fix the balance cable 141 wound around the guide groove 122.

The main pulley 110 has a plate shape close to a circular shape and a through hole 112 into which the rotation shaft 101 is fitted is formed at the center thereof. The through hole 112 may be formed eccentrically. The outer peripheral surface of the main pulley 110 is formed with a guide groove 111 recessed to a predetermined depth so that the balance cable 141 can be wound. In addition, a through hole 113 is formed in the inner side so that the inner side dustproof plate 171 to be described later is fitted. In addition, a through hole 116 is formed to control a section in which the interference pin 181 is moved. In addition, a fixing protrusion 117 is formed at the end of the guide groove 111 to fix the balance cable 141 wound around the guide groove 111.

The cam 130 interposed between the main pulley 110 and the auxiliary pulley 120 is fixed to the main pulley 110. The cam 130 has a curvature shape as a whole, and one side is formed with a curved portion 131 forming a curved arc shape, and the other side includes a steep slope portion 132 which forms a steep slope so as to be close to the rotation shaft 101. The curved portion 131 and the steep slope 132 is formed with a guide groove 133 is wound around the balance cable 141 and the bow string 142. In addition, a fixing protrusion 115 protruding from the main pulley 110 to a predetermined height is formed at the end side of the curved portion 131 so that the cam cable 143 may be fixed, and a bow string (at the end side of the steep slope 132). A fixing protrusion 114 protruding from the main pulley 110 to a predetermined height is formed so that the 142 may be fixed.

The driven pulley 190 has a circular plate shape and a guide groove 191 recessed to a predetermined depth is formed on the outer circumferential surface thereof.

In addition, the main pulley 110, the auxiliary pulley 120 and the driven pulley 190 is preferably equipped with a dustproof member made of a rubber material to prevent noise and vibration.

The anti-vibration member includes an inner dustproof plate 171 and a main pulley 110 fitted into the through holes 113 and 123 formed in the main pulley 110 and the auxiliary pulley 120 and the through holes formed in the driven pulley 190. ) And an outer dustproof plate 172 mounted on the outer circumferential surface of the driven pulley 190. The outer dustproof plate 172 may be mounted at a position where the balance cable 141 and the bow string 142 are in contact with each other, and the balance cable 141 or the bow string 142 is not pulled out. The guide groove 172a is formed at the surface where) is contacted. The guide groove 172a preferably has a narrower width than the guide groove 111 formed in the main pulley 110 and the guide groove formed in the driven pulley 190.

Another anti-vibration member is composed of the anti-vibration cover (181a, 182a) is covered on the interference pin 181 and the stop pin (182).

The hook 151 is formed on one side of the fixing plate 150, the fixing plate 150 is inserted into the balance cable 141 in the coupling hole 152 penetrated in the longitudinal direction is fixed.

A process of operating the compound bow as the first preferred embodiment of the present invention configured as described above is as follows.

As shown in FIG. 7, before pulling the bow string 142, the grip pin 164b of the stopper 160 is pressed to release the latching state of the catching portion 163b that extends over the catching jaw 164a to release the catch 164. The stopper 160 and the locking ring 151 are separated from each other while the hook part 163a, which is inserted into the locking ring 151, is rotated while rotating.

When the bow string 142 is pulled by a predetermined length in this state, as shown in FIG. 8, the bow body 100 is bent inward and the balance cable 141 connects the main pulley 110 and the auxiliary pulley 120. Pulled. At this time, since the pulley length of the balance cable 141 wound around the auxiliary pulley 120 having a large radius is longer than the pulley length of the balance cable 141 wound on the main pulley 110, the pulley 161 is actuated. Correct the length difference. In other words, the balance cable 141 moves through the pulley 161 toward the main pulley 110. As the balance cable 141 is moved toward the main pulley 110 as described above, the distance between the stopper 160 and the hook 151 is farther away. In addition, up to this state, the interference pin 181 is maintained in a state in which one side of the moving hole 116 is supported.

As described above, when the initial bow string 142 is pulled, the pulling force is divided into the main pulley 110 and the auxiliary pulley 120, and thus, the bow string 142 with a small force by the large auxiliary pulley 120. ) Will be able to draw.

In addition, the auxiliary pulley 120 that rotates together with the main pulley 110 may not rotate any more after the stop pin 182 mounted on the auxiliary pulley 120 contacts the wing 103.

If the bowstring 142 continues to be pulled, the cam 130 rotated together is in a let off state. That is, as the bow string 142 wound on the cam 130 is positioned on the steep slope 132 through the curved portion 131, the pulling force is rapidly decreased. In addition, since the auxiliary pulley 120 can no longer be rotated in the state in which the stop pin 182 is in contact with the wing 103, only the main pulley 110 is rotated. As only the rotation of the main pulley 110 proceeds, the interference pin 181 supported on one side of the moving hole 116 is also released, and the hook 151 is gradually closer to the stopper 160.

When the bow string 142 is pulled as far as it is to reach the state of FIG. 9, the hook ring 151 is temporarily bound while being in contact with the hook portion 163a. At this time, the contact surface of the hook portion 163a to which the hook ring 151 contacts is formed of an inclined surface so that the hook ring 151 can be easily fitted to the hook portion 163a.

When the bow string 142 is released in the state in which the bow string 142 is maximally pulled, the bow string 142 is returned to its original state by the elastic force of the bow body 100, and the arrow is fired.

When the bow ring 142 is placed in the state where the hook 151 is engaged with the hook portion 163a as described above, the power is concentrated on the main pulley 110 while pulling the balance cable 141 with a large force. The cable 141 is to be wound only to the main pulley 110 side.

At this time, since the force is not applied to the auxiliary pulley 120, the balance cable 141 wound on the side of the auxiliary pulley 120 becomes relatively loose and the balance cable 141 is guided by the departure prevention part 127. ) Is not to escape.

As the interference pin 181 is in contact with one side of the movement hole 116 formed in the main pulley 120 that was rotated as described above, the auxiliary pulley 120 is also main until the bow string 142 returns to its original state. Will rotate with the pulley 120. At this time, the balance cable 141 that was wound around the auxiliary pulley 120 maintains a loose state.

When the bow string 142 is returned to its original state, the arrow is fired and the hook 151 remains still constrained by the hook portion 163a.

If the user presses the handle pin 164a to release the hook 151 that is restrained by the hook part 163a before the next bow shooting, the balance cable 141 is moved along the pulley 161 and the auxiliary pulley ( The force is also applied to the balance cable 141 that is wound around 120.

As described above, the compound bow according to the first embodiment of the present invention is pulled because the force is divided by the main pulley 110 and the auxiliary pulley 120 having a larger radius than the main pulley 110 when the bow string 142 is pulled. The power required to save is saved.

In addition, when the bow string 142 starts to return to its original state while being pulled as far as possible, the hook 151 is engaged with the hook portion 163a of the stopper 160, so that a force acts on the main pulley 110 to cause the bow. Since the string 142 is wound with a large force, the driving force of the arrow is improved.

Likewise, a compound bow as a second preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

10 is a perspective view showing a compound bow as a second preferred embodiment of the present invention, and FIGS. 11 and 12 are exploded perspective views showing the main pulley, the auxiliary pulley and the cam shown in FIG. 10 in an exploded perspective view. 15 is a state diagram schematically showing a state in which a compound bow is operated, FIG. 13 is a state diagram showing a state before the bow string is pulled, and FIG. 14 is a state diagram showing a state in which the bow string is pulled by a predetermined length. 15 is a state diagram showing a state in which the bow string is completely pulled out.

As shown, a compound bow, which is a second preferred embodiment of the present invention, is a bow consisting of a handle portion 102 held by hand and a wing 103 formed at both ends of the handle portion 102 and having an incision cut along the center portion. The main body 100, the rotary shaft 101 fixed to both ends of the bow body 100, that is, the tip of the wing 103, and the main pulley 210 and the main pulley rotatably mounted to the rotary shaft 101 A dual pulley having a radius larger than 210 and rotatably mounted to the rotating shaft 101 and mounted to the rotating shaft 101 at both ends, and the main pulley 210 and the auxiliary pulley ( A cam 230 interposed between the 220 and mounted on the main pulley 210, a stop pin 282 mounted on the auxiliary pulley 120 to protrude toward the wing 103, and the main pulley 210 and the auxiliary pulley 210. Both ends are fixed to the pulley 220 and each balun wound in the same direction to the main pulley 210 and the auxiliary pulley 220 Cable 241, each of the hook 151 is mounted at a position close to the main pulley 210 in the middle of the balance cable 241, and a hook 151 located in the middle of the balance cable 241 ) Is temporarily fixed to each stopper 160, one side is fixed to the end of the wing 103 of the ring body 100, the other side is fixed to the main pulley 210 located in the opposite direction and to the cam 230 Each cam cable 243 wound in a direction opposite to the balance cable 241 and a bowstring 242 connected to both ends of each stopper 160.

The structure of the stopper 160 and the hook 151 is the same as the first preferred embodiment of the present invention, the detailed description thereof refers to the first preferred embodiment of the present invention.

The auxiliary pulley 220 has a plate shape close to an oval shape, and an eccentric through hole 221 is formed in the central region. The outer circumferential surface of the auxiliary pulley 220 is formed with a guide groove 222 recessed to a predetermined depth so that the balance cable 241 can be wound. On one side of the guide groove 222 is extended to protrude along the guide groove 222 by a predetermined height is formed a departure prevention portion 227 to prevent the separation of the cam cable 241 is formed. A stop pin long hole 224 and an interference pin long hole 225 having an arc shape are formed around the through hole 221. The stop pin long hole 224 is screwed with a stop pin 282 protruding to a predetermined height to temporarily contact the wing 103. An interference pin 281 protruding toward the main pulley 210 is screwed into the interference pin long hole 225. The stop pin 282 and the interference pin 281 is composed of a screw coupled structure it is possible to adjust the position according to the user's preference. In addition, the end of the guide groove 222 is formed with a fixing projection 226 for fixing the balance cable 241 wound in the guide groove 222.

The main pulley 210 has a plate shape close to a circle, and a through hole 212 into which the rotation shaft 101 is fitted is formed at the center thereof. The through hole 212 may be formed eccentrically. The outer circumferential surface of the main pulley 210 is formed with a guide groove 211 recessed to a predetermined depth so that the balance cable 241 can be wound. In addition, at a portion of the outer circumferential surface, an interference protrusion 216 is formed so that the interference pin 281 may be temporarily contacted. And at the end of the guide groove 211 is formed a fixing projection 217 for fixing the balance cable 241 wound in the guide groove 211.

The cam 230 interposed between the main pulley 210 and the auxiliary pulley 220 is fixed to the main pulley 210. The cam 230 is formed in a plate shape close to the fan shape. The cam 230 is connected to the arcuate portion 231 and the arcuate portion 231 end formed in an arc shape and is made of a steep inclined portion 232 to form a steep slope so that the other end is close to the rotary shaft 101. The curved portion 231 and the steep slope 232 is formed with a guide groove 233 recessed to a predetermined depth to guide the cam cable 243. As shown, another structure having the same shape as the curved portion 231 is preferably extended to one side of the main pulley 210. A fixing protrusion 214 protruding from the main pulley 210 to a predetermined height is formed at the end side of the curved portion 231 or the extended curved portion so that the cam cable 243 wound on the cam 230 can be fixed. .

In addition, although not shown, it is preferable that the dustproof member is mounted to the main pulley 210 and the auxiliary pulley 220 as in the first preferred embodiment of the present invention. The dustproof member includes an inner dustproof plate 171 and an outer dustproof plate 172.

Another anti-vibration member consists of anti-vibration covers 281a and 282a which are covered by the interference pins 281 and the stop pins 282.

A process of operating the compound bow as a second preferred embodiment of the present invention configured as described above is as follows.

As shown in FIG. 13, before pulling the bow string 242, the hook pin 164b of the stopper 160 is pressed to release the hook portion 163a which is fitted to the hook 151, thereby engaging with the stopper 160. The ring 151 is switched to the separated state. Each stopper 160 formed at both ends of the bowstring 242 should be separated from the catch ring 151.

When the bow string 242 is pulled by a predetermined length in this state, the bow body 100 is bent as shown in FIG. 14, and the balance cable 241 pulls the main pulley 210 and the auxiliary pulley 220. . At this time, as the pulley 161 is operated, the difference in the unwinding length of the balance cable 243 released from the main pulley 210 and the auxiliary pulley 220 is corrected. That is, as the balance cable 241 is moved toward the main pulley 210, the distance between the stopper 160 and the hook 151 is farther away. In addition, up to this state, the interference pin 281 is maintained in the state supported by the interference jaw 216.

When the initial bow string 242 is pulled as described above, the pulling force acts by being divided into the main pulley 210 and the auxiliary pulley 220, so that the bow string 242 with a small force by the large auxiliary pulley 220 is used. Will be able to pull.

The auxiliary pulley 220 that rotates together with the main pulley 210 is no longer rotated after the stop pin 282 mounted to the auxiliary pulley 220 contacts the wing 103.

When the bow string 242 continues to be pulled, the cam 230 rotated together is in a let off state. That is, as the cam cable 243 wound on the cam 230 is positioned on the steep slope 232 after passing through the curved portion 231, the pulling force is rapidly decreased. In addition, since the auxiliary pulley 220 can no longer be rotated in the state in which the stop pin 282 is in contact with the wing 103, only the main pulley 210 is rotated. As only the rotation of the main pulley 210 proceeds, the interference pin 281, which has been in contact with the interference jaw 216, is also released from the support state, and the hook 151 is gradually closer to the stopper 160.

When the bow string 242 is pulled as far as possible to reach the state shown in FIG. 15, the hook rings 151 are temporarily caught by the hook portions 163a.

When the bow string 242 is released in the state in which the bow string 142 is maximally pulled, the bow string 242 returns to its original state by the elastic force of the bow body 100, and the arrow is fired.

When the bow ring 242 is placed in the state where the hook 151 is engaged with the hook portion 163a as described above, the balance is concentrated on the main pulley 210 while pulling the balance cable 241 with great force. The cable 141 is to be wound only to the main pulley 210 side.

At this time, since the force is not applied to the auxiliary pulley 220, the balance cable 241 wound on the side of the auxiliary pulley 220 becomes relatively loose and the balance cable 241 is guided by the departure prevention part 227. 222).

The auxiliary pulley 220 is also the main pulley 210 until the interference string 216 formed on the main pulley 220 rotated as described above is in contact with the interference pin 281 and the bowstring 242 returns to its original state. Will rotate). At this time, the balance cable 241 wound on the auxiliary pulley 220 continues to be loose.

As described above, the compound bow as the second preferred embodiment according to the present invention is pulled because the force is divided into the main pulley 210 and the auxiliary pulley 220 when the bow string 242 is pulled as in the first preferred embodiment of the present invention. The power required to save is saved.

In addition, when the bowstring 242 starts to return to its original state, the force acts only on the main pulley 210, so that the bowstring 242 is wound with a large force. That is, the pulling force of the bow string 242 is increased, and the driving force of the arrow is improved.

The present invention is not limited to the above-described specific preferred embodiments, and various modifications can be made by any person having ordinary skill in the art without departing from the gist of the present invention claimed in the claims. Of course, such changes will fall within the scope of the claims.

1 is a perspective view showing a compound bow of a conventional structure,

FIG. 2 is a perspective view partially showing the cam mount shown in FIG. 1; FIG.

3 is a perspective view showing a compound bow as a first preferred embodiment of the present invention;

4 and 5 are exploded perspective views showing the main pulley, the auxiliary pulley and the cam shown in FIG.

6 is an exploded perspective view showing an exploded stopper shown in FIG. 3;

7 to 9 is a state diagram schematically showing a state in which the compound bow is operated,

7 is a state diagram showing a state before the bow string is pulled,

8 is a state diagram showing a state in which the bow string is pulled by a predetermined length,

9 is a view showing a state in which the bow string is pulled completely;

10 is a perspective view showing a compound bow as a second preferred embodiment of the present invention;

11 and 12 are exploded perspective views showing the main pulley, the auxiliary pulley and the cam shown in FIG.

13 to 15 is a state diagram schematically showing a state in which the compound bow is operated,

13 is a state diagram showing a state before the bow string is pulled,

14 is a state diagram showing a state in which the bow string is pulled by a predetermined length,

Fig. 15 is a diagram illustrating a state in which the bow string is completely pulled out.

** Description of the symbols for the main parts of the drawings **

100: bow body

101: axis of rotation

110, 210: main pulley

120, 210: auxiliary pulley

130, 230: Cam

141, 241: balanced cable

142, 242: bowstring

143,243: Cam Cable

151: hook

160: stopper

190: driven pulley

Claims (24)

A bow body held by the user by the hand and having an elastic force; A rotating shaft fixed to one end of the bow body; A dual pulley comprising a main pulley rotatably mounted to the rotating shaft and an auxiliary pulley rotatably mounted to the rotating shaft with a larger radius than the main pulley; A cam mounted to the main pulley; A balance cable fixed at both ends of the main pulley and the auxiliary pulley and wound in the same direction to the main pulley and the auxiliary pulley; A stopper for forming a pulley wound around the middle of the balance cable on one side and temporarily fixing the balance cable from the state in which the arrow is pulled to the moment of firing; A cam cable having one side fixed to the other end of the bow body and the other side fixed to the main pulley and wound in the same direction as the balance cable to the cam; A driven pulley rotatably fixed to the other end of the bow body; And A bowstring, one end of which is connected to the stopper and wound on the driven pulley, the other end of which is wound on the cam pull in the opposite direction to the cam cable; Compound bow comprising a. The method of claim 1, Guide grooves are formed on the outer circumferential surfaces of the main pulley, the auxiliary pulley, and the driven pulley to allow the balance cable or the bow string to be wound, and the auxiliary pulley has the guide groove to prevent separation of the cam cable. Compound bows, characterized in that provided with a separation prevention portion protruding to extend by a predetermined height. 3. The method of claim 2, The main pulley, the auxiliary pulley and the driven pulley compound bow characterized in that it further comprises a dustproof member made of a rubber material to prevent noise or vibration generated during operation. The method of claim 3, wherein The anti-vibration member is a compound bow, characterized in that the inner vibration plate is fitted to the through-hole formed in the main pulley, the auxiliary pulley and the driven pulley. The method according to claim 3 or 4, The dustproof member is mounted to the main pulley and the driven pulley outer circumferential surface and is mounted to a portion where the balance cable or the bow string contact with the pulled bow string returned to its original state, and the balance cable or the bow string is guided. Compound bows, characterized in that consisting of an outer dustproof plate provided. The method of claim 1, wherein the cam It consists of an arc-shaped arcuate portion and the end of the arcuate portion is formed of a steep inclined portion to form a steep slope so that the other end is close to the rotation axis, the guide portion for guiding the cam cable or the bow string to the arcuate portion and the steep slope portion Compound bow characterized in that it is provided. The auxiliary pulley according to claim 1, wherein the auxiliary pulley includes a stop pin mounted to the auxiliary pulley such that the auxiliary pulley is rotated by a predetermined angle so that the auxiliary pulley is not rotated any more and only the main pulley is rotated. Compound bow further comprising a. The method of claim 7, wherein The stopper is a compound bow, characterized in that screwed to a predetermined portion of the stopper pin hole formed in the auxiliary pulley. The method of claim 1, The auxiliary pulley is a compound bow, characterized in that it further comprises an interference pin screwed to a predetermined portion of the interference pin long hole formed in the auxiliary pulley, the end of which is moved along the movement hole formed in the main pulley. The method according to claim 8 or 9, Compound stopper, characterized in that the stop pin and the interference pin is covered with a dust cover to prevent noise and vibration. The compound bow of claim 1, wherein the main pulley and the auxiliary pulley are mounted eccentrically on the rotating shaft. A bow body held by the user by the hand and having an elastic force; Rotating shafts fixed to both ends of the bow body; Each dual pulley comprising a main pulley rotatably mounted to the rotating shaft and an auxiliary pulley rotatably mounted to the rotating shaft and having a radius greater than that of the main pulley; Each cam mounted to the main pulley; Each balance cable fixed to both ends of the main pulley and the auxiliary pulley and wound in the same direction; A respective stopper formed on one side of a pulley wound around the middle of the balance cable and temporarily fixing the balance cable from the time the arrow is pulled to the moment of firing; One cam is connected to one end of the bow body and the other is fixed to the main pulley and wound on the cam in the opposite direction to the balance cable; And Bow strings, both ends of which are connected to the stopper; Compound bow comprising a. The method according to claim 1 or 12, The stopper is A housing in which the bowstring is connected to one side, and the pulley is rotatably mounted on an intermediate portion and a protrusion protruding by a predetermined length on the other side; A hook portion rotatably fixed to the protruding portion, the hook portion protruding from the intermediate point of the balance cable so as to be temporarily fixed to a position close to the main pulley side, and a hook protruding to control the rotation. An additionally formed latch; A first torsion spring for urging the latch so that the hook portion can be rotated in a direction away from the hook; A detent rotatably mounted to the protruding portion and having a catching jaw for temporarily contacting with a catching portion of the catch and controlling a rotation of the catch and a handle pin protruding out of the housing; And A second torsion spring for pressing the detent in a direction in which the locking portion is supported on the locking jaw; Compound bow comprising a. The method of claim 13, On the handle pin of the detent Shooting an arrow is a compound bow, characterized in that the release wire is further connected to one side of the cam cable so that the locking ring which is caught on the locking portion while the detent is rotated. The method of claim 12, Guide grooves are formed on the outer circumferential surfaces of the main pulley and the auxiliary pulley to allow the balance cable to be wound, and the auxiliary pulley protrudes by a predetermined height along the guide groove to prevent separation of the cam cable. Compound bow, characterized in that provided with a departure prevention portion. The method of claim 12, Compound bows, characterized in that the main pulley and the auxiliary pulley further comprises a dustproof member made of a rubber material to prevent noise or vibration generated during operation. The method of claim 16, The anti-vibration member is a compound bow, characterized in that the inner vibration plate is fitted into the through-hole formed in the main pulley and the auxiliary pulley. The method according to claim 16 or 17, The dustproof member is mounted on an outer circumferential surface of the main pulley and is mounted to a portion where the balance cable is in contact with the pulled bowstring to its original state, and comprises an outer dustproof plate provided with a guide groove for guiding the balance cable. Compound bow. The method of claim 12, The cam is Comprising an arc shape around the axis of rotation and the end of the elongated portion is formed with a steep inclination to form a steep slope so that the end is closer to the rotation axis, the elongated portion and the steep guide to guide the cam cable Compound bow characterized in that the groove is provided. The auxiliary pulley of claim 12, wherein the auxiliary pulley includes a stop pin mounted to the auxiliary pulley such that the auxiliary pulley is rotated by a predetermined angle so that the auxiliary pulley is not rotated any more and only the main pulley is rotated. Compound bow further comprising a. The method of claim 12, The stop pin is a compound bow, characterized in that screwed to a predetermined portion of the stop pin long hole formed in the auxiliary pulley. The method of claim 12, The auxiliary pulley is screwed to a predetermined portion of the interference pin long hole formed in the auxiliary pulley, the end of the compound bow, characterized in that the contact with the interference jaw formed in the main pulley. The method of claim 21 or 22, Compound stopper, characterized in that the stop pin and the interference pin is covered with a dust cover to prevent noise and vibration. 13. The compound bow of claim 12, wherein the main pulley and the auxiliary pulley are mounted eccentrically on the rotating shaft.

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