KR101562779B1

KR101562779B1 - Compact compound slingbow

Info

Publication number: KR101562779B1
Application number: KR1020130153861A
Authority: KR
Inventors: 박경신
Original assignee: 박경신
Priority date: 2013-12-11
Filing date: 2013-12-11
Publication date: 2015-10-28
Also published as: KR20150068082A

Abstract

A compact compound sling bow is initiated. A compact compound sling bow according to the present invention includes: a bow main body having a curved portion formed on a front surface thereof and a vertical portion formed on one side of the curved portion; An upper pulley and a lower pulley rotatably coupled to the upper and lower portions of the curved portion; A guide pulley rotatably coupled to an upper portion of one side of the curved portion so as to be disposed at a lower portion of the upper pulley; A differential cam rotatably coupled to a lower portion of the vertical portion; A ramp whose one end is fixed to the large-leaf sheave of the differential cam and whose other end is fixed to the large-leaf sheave of the differential cam via the guide pulley, the upper pulley and the lower pulley; An elastic connecting rod having one end fixed to the lobe cam of the differential cam and the other end connected to the elastic body; And an elastic body having one end fixed to the vertical part and the other end fixed to the elastic connection line to provide a constant elastic force.

Description

COMPACT COMPOUND SLINGBOW

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a compact compound sling bow, and more particularly, to a small-sized compact compound sling bow having an elastic body such as a rubber band or a spring as an energy storage medium and a single differential cam.

Generally, compound sling bow uses rubber band as energy storage medium and accumulates energy efficiently by using cam, so the arrow speed is fast when the arrow is fired.

The cam used in Compound Sling Bow has evolved from the Compound Bow. It is common to use two limbs as an energy storage medium in a compound bow, but in a compound slingsbow, only one elastic body such as a rubber band or a spring may be used.

Therefore, the cam used in compound sling bow is developing accordingly.

For example, referring to the video of the Internet site, the following description will be given.

1) http://www.youtube.com/watch?v=pODCYp8C-0Q: Energy storage is a spring so you can fire very light projectiles such as dry fire and iron balls at very high speed, It is also possible to launch, and the overall size is so small that it is easy to carry. Using only a single spring eliminates the need for additional devices for synchronization. However, it is a problem to use a deformed large cam to reduce the overall size.

2) http://shoottech.com/technology: Because energy storage is elastic, it is possible to fire very light projectile such as dry fire and iron ball at very high speed as well as arrow shooting.

In other words, seeing http://www.youtube.com/watch?v=vtp8NIEJAu8, the compound sling bow is firing iron beads without damage.

However, since the upper and lower ribs are symmetrical, the upper and lower rubber strips must be stretched in the same amount. Therefore, there is a problem that a synchronizing device (Bus-Cable) must be installed and a large size inconvenient to carry.

3) http://www.libertyarchery.com/index.html: Known as the smallest compound spring available in mass production, the overall size is very small and light, making it easy to carry.

However, the upper and lower sides are symmetrical, and a synchronization cable (bus cable) must be installed, and a deformed cam is a problem to reduce the overall size. In addition, since it is a compound bow using a rope, there is a disadvantage that a compound bow is broken when dry fire or a marbling is performed.

4) Korean Registered Patent No. 10-1253209 (Registered on Apr. 04, 2013): Small cam is used, rubber band is used as energy storage means, and was filed by the present applicant as a small compound sling bow which is easy to carry.

This includes an intrinsic riser RP, an outer riser RO whose one end is coupled to the outer end of the intrinsic riser RP, differential cams CL and CS disposed in the middle of the outer riser RO, (R) connected to the differential cam by an end portion of the cable (C) and an end portion of the idler pulley (P) And the other end includes an auxiliary riser (RS) coupled to the outer riser (RO).

According to this configuration, when the slip S is pulled to fire the arrow, the energy is stored in the differential cams CL and CS which are rotated in the pulling direction of the slip S with respect to the outer riser RO, You can.

However, the conventional compound sling bow has the advantage of increasing the accuracy of the arrow by reducing the phase shift of the idler pulley in the idler pulley when the arrow is fired. However, in the conventional compound sling bow, two upper and lower cams are used There is a problem in the synchronization of the cam in actual use, and a device such as a bus cable for a separate synchronization is required. In addition, since there are two differential cams, there is a problem in that efficiency is lowered when the stored energy is used due to the weight of the differential cams.

Therefore, the energy storage medium is used only as an elastic body such as a rubber band or a spring, and since only one differential cam is used, the lengths of the upper and lower pulleys lead to the same lengths, Research on the development of compound sling bow which can be used without the need of cable has been demanded.

1. Korean Patent No. 10-1253209 2. US registered patent US 6,698,413 B1 3. U.S. Published U.S. Pat. No. 5,054,463

The technical object of the present invention is to provide a compact compound sling bow capable of realizing a small and light arrow shooting device while using the advantages of an eccentric cam capable of storing a lot of energy like an existing compound bow and emitting arrows .

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are not intended to limit the invention to the precise form disclosed. There will be.

According to an aspect of the present invention, there is provided a bow main body having a curved portion formed on the front surface and a vertical portion formed on one side of the curved portion, An upper pulley and a lower pulley rotatably coupled to the upper and lower portions of the curved portion; A guide pulley rotatably coupled to an upper portion of one side of the curved portion so as to be disposed at a lower portion of the upper pulley; A differential cam rotatably coupled to a lower portion of the vertical portion; A ramp whose one end is fixed to the large-leaf sheave of the differential cam and whose other end is fixed to the large-leaf sheave of the differential cam via the guide pulley, the upper pulley and the lower pulley; An elastic connecting rod having one end fixed to the lobe cam of the differential cam and the other end connected to the elastic body; And an elastic body having one end fixed to the vertical part and the other end fixed to the elastic connection line to provide a constant elastic force.

Wherein the differential cam comprises: a bobbin sheave rotatably coupled to the vertical portion and adapted to wind the bobbin; And a lobed cam which is formed on one side of the large leaf sheath so that the elastic connection line is wound.

And the differential cam is coupled to the vertical portion so as to be disposed in a direction parallel to the slip passing through the upper pulley and the lower pulley.

The guide pulley is characterized by guiding the straight line to be held when the slope is pulled in the direction toward the upper pulley.

And the elastic connection rib is fixed to a portion where the diameter of the lid cam is the largest at one end so as to transmit energy to the differential cam.

The elastic body is characterized by being formed of rubber strands or springs.

According to the present invention, by providing a compact compound sling bow having a single differential cam composed of a single leaf sheave and a single leaf cam, the differential cam is lighter than the conventional compound sling bow, can do.

1 is a schematic view of a side view of a compact compound sling bow according to the present invention before drawing a stripe.
FIG. 2 is a schematic view of the compact compound sling bow shown in FIG. 1, as viewed from the rear, prior to drawing a stripe. FIG.
Fig. 3 is an enlarged view of the differential cam of the compact compound sling bow shown in Fig. 1 before drawing the strike line as seen from the side of the large-leaf sheave.
Fig. 4 is an enlarged view of the differential cam of the compact compound sling bow shown in Fig. 3 as viewed from the side. Fig.
5 is a schematic view of a side view of a compact compound sling bow according to the present invention when fully drawn.
FIG. 6 is a schematic view of the compact compound sling bow shown in FIG. 5, viewed from the rear after full drawing. FIG.
Fig. 7 is an enlarged view of the differential cam of the compact compound sling bow shown in Fig. 5 viewed from the side of the large leaf sheave.
Fig. 8 is an enlarged view of the differential cam after full drawing of the compact compound sling bow shown in Fig. 7 as viewed from the side. Fig.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, the well-known functions or constructions will not be described in order to simplify the gist of the present invention.

1 is a schematic view of a side view of a compact compound sling bow according to the present invention before drawing a stem, and Fig. 2 is a schematic view of a compact compound sling bow before drawing a stem of the compact compound sling bow shown in Fig. Fig. 3 is an enlarged view of the differential compound sling bow of the compact compound sling bow shown in Fig. 1 before drawing the stripe, as viewed from the side of the large leaf sheave, and Fig. 4 is an enlarged view FIG. 5 is a schematic view of a side view of a compact compound sling bow according to the present invention when it is full drawn, and FIG. 6 is a cross- FIG. 7 is a schematic view of the compact compound sling bow shown in FIG. 5 after full drawing of the compact compound sling bow shown in FIG. 5, And the enlarged view of the fact that the differential cam compound bow sling daeyeop side pulley, Figure 8 is a close-up view showing a differential cam after the full drawing (full drawing) of the compact sling compound bow shown in Fig side side.

1 to 4, a compact compound sling bow according to the present invention includes a bow body 10 having a curved portion 12 and a vertical portion 14, a curved portion 12 of the bow body 10, An upper pulley 20 and a lower pulley 22 that are rotatably coupled to the upper and lower portions of the vertical portion 14 so as to be rotatable and rotatably coupled to the lower portion of the vertical portion 14, The differential cam 40 is coupled to the differential cam 40 via the guide pulley 30, the upper pulley 20 and the lower pulley 22 with one end fixed to the bifurcated pulley 42 of the differential cam 40 And an elastic connecting line (not shown) which is fixed at one end to the lid cam 44 of the differential cam 40 and whose other end is fixed to the elastic body 62 60).

Here, one end of the elastic body 62 is fixed to the elastic connecting line 60, and the other end thereof is fixed to the vertical portion 14.

The bow main body 10 forms a main frame of a compound sling bow, and a curved portion 12 is formed on the front surface thereof. A vertical portion 14 is formed on one side of the curved portion 12 so as to be connected. That is, the vertical part 14 is for connecting the free ends formed on one side of the curved part 12 so as to rotatably couple the differential cam 40 while reinforcing the vertical part 14.

The upper pulley 20 and the lower pulley 22 are rotatably coupled to one side and the lower side of the vertical portion 12 constituting the bow body 10. The upper pulley 20 and the lower pulley 22 serve to prevent the right and left movement of the slide bar 50 drawn out from the differential cam 40 when the arrow is fired.

That is, the elevation line 50 is pulled out in a state of being wound in approximately four or two lines on the large sheave pulley 42 of the differential cam 40. Therefore, the elevation line 50 is drawn out while slightly moving left and right. 20 and the lower pulley 22, respectively.

The guide pulley 30 is rotatably coupled to an upper portion of one side of the curved portion 14 and serves to guide the runway 50 in the direction of the upper pulley 20. At this time, the guide pulley 30 is coupled to the curved portion 14 immediately below the upper pulley 20 so that the guide pulley 30 can maintain a vertical state when the slip 50 is pulled in the direction of the upper pulley 20 .

The differential cam 40 is provided in the vertical portion 14 and the large-diameter sheave 42 is rotatably coupled to the lower portion of the vertical portion 14. On the large-leaf sheave 42, the slip lines 50U and 50L are wound up to four layers. At this time, the large-leaf sheave 42 is formed in a general pulley shape.

Wherein the differential cam 40 is coupled to the vertical portion 14 so as to be disposed in parallel with the ramp 50 passing through the upper pulley 20 and the lower pulley 22. [

In addition, although the bobbin pulley 42 of this embodiment is formed in a pulley shape, the bobbin pulley 42 may be provided in a cam shape as another embodiment of the present invention.

A lobe cam (44) is provided at one side of the large-leaf sheave (42) so as to wind the elastic connecting rods (60). At this time, the lobule cam 44 has a spiral groove having a different radius at one side of the large-leaf sheave 42, and the amount of rotation of the spiral is set to about 450 degrees. The helical groove is formed such that the elastic connecting line (60) is fixed to the portion having the largest radius, and the portion having the smallest radius is disposed to pass through the portion having the smallest radius when the radius is decreased, The straight section is formed, and the groove ends.

The differential cam 40 effectively stores energy during drawing of the ramp through the large-leaf sheave 42 and the small-leaf cam 44, thereby maximizing the driving force of the arrow.

The sloping line 50 is guided by the guide pulley 30, the upper pulley 20 and the lower pulley 22 in the state where the one end is fixed to the lobed pulley 42 and is again connected to the lobed pulley 42 of the differential cam 40 And the other end is fixed.

The sloping line 50 includes 1) a portion 50L extending from the fixed portion of the large leaf shear 42 to the lower sheave 22 including the portion wound on the large sheave pulley 42 and 2) A portion 50U extending from the fixed portion to the guide pulley 30 including a portion wrapped around the large sheave pulley 42 and a portion 50U extending from the upper portion to the lower pulley 22, .

At this time, since the portion 50L which is drawn into the lower pulley 22 from the large-leaf sheave 42 is pulled in the vertical state from the groove of the large-leaf sheave 42 to the lower groove of the lower pulley 22, The portion of the portion of the upper pulley 30 that is drawn into the upper pulley 20 from the larger pulley 42 through the guiding pulley 30 is maintained in a diagonal line with the groove of the upper pulley 20 when the guiding pulley 30 is not present Friction occurs between the upper pulley 20 and the ramp 50U. The slope 50U is vertically held by the guide pulley 30 in a section between the upper pulley 20 and the guide pulley 30 and is pulled into the upper pulley 20, 50U.

The angle of the inclined line formed by the inclined stem 50 and the upper sheave 20 is reduced when the inter-axis distance Ax of the compound slings of the present embodiment is long. Thus, even if the guide sheave 30 is not provided, The friction between the extension bars 50 is reduced and may be removed.

These elevators 50L and 50U are wound around the large sheave pulley 42 and are naturally released from the large sheave pulley 42 while drawing the elevation line 50. [

Here, the glider 50 is allowed to overlap three lines in the grooves of the foliage pulley 42. That is, if the differential cam 40 is made to rotate by about 450 degrees, each of the tendons 50L and 50U not exceeding 360 degrees from the tendency line fixing portion is one each, but if exceeding 360 degrees, 3 rows, depending on the position of the stem of the stem can be 4 layers. Thus, the length of the slip that can be released can be sufficiently made, so that the size of the large-leaf sheave 42 of the differential cam 40 can be made small.

One end of the elastic linkage 60 is fixed to the lid cam 44 and the other end is fixed to the elastic body 62. [ At this time, one end of the elastic connection line 60 is fixed to a portion having the largest radius among the spiral grooves having different radii of the lid cams 44.

One end of the elastic body 62 is connected to the elastic body connecting line 60 and the other end is fixed to the upper part of the vertical part 14. At this time, the elastic body 62 may be provided with a rubber band or a spring that provides a high elastic force.

Here, the force for pulling the tension line 50 is transmitted to the elastic body 62 through the differential cam 40 and the elastic connecting line 60, so that the elastic body 62 is stretched to store energy.

In the present embodiment, the elastic body 62 is formed of a rubber band or a spring. However, as another embodiment of the present invention, the elastic body 62 may use at least one barb (not shown) mounted on the bow body 10 .

Hereinafter, the operation of the compound sling bow according to an embodiment of the present invention will be described with reference to FIGS. 5 to 8. FIG.

5 to 8, when the arrow 50 is drawn in the direction of the arrow to fire the arrow, the arrow 50U is directed in the direction of the upper pulley 20, The differential cam 40 is rotated so that the lines 50L and 50U wound on the large sheave pulley 42 are loosened and at the same time the elastic connecting line 60 is elastically deformed by the elastic member 62 And begins to be wound on the leaf cam 44 as it is stretched.

At this time, the elastic connecting line 60 is fixed to the largest radius of the lobule cam 44, and the elastic member 62 is initially stretched much in accordance with the unit distance of the pulling line 50, After that, it grows very little and efficiently stores the energy that can fire the arrow. Even if the differential cam 40 is rotated by about 450 degrees, the grooves of the leaf cams 44 have a spiral structure, so that there is no overlapping of the elastic connecting rods 60. [

When the slide bar 50 is fully drawn, the slide bar 50 is maximally moved in the pulling direction with respect to the bow main body 10 and at the same time the elastic body 62 is extended to the maximum, (62) is wound on the leaf cam (44) by the stretched length. At this time, the elastic connection line 60 passes through a straight line section including a portion having the smallest radius.

The elastic body 62 is rapidly contracted so that the elastic body connecting line 60 wrapped around the lyocell cams 44 is pulled in the direction of the elastic body 62 as the elastic body 62 is rapidly contracted to release the arrow 50 in the full drawing state So that the differential cam 40 rotates in the direction opposite to the drawing direction. At the same time, the elevation lines 50L and 50U are rewound on the large leaf shear 42 and the elevation line 50 is returned to the pre-drawing state, so that the arrows can be fired.

As described above, the compound slingsbow of the present embodiment includes the large-leaf shear 42 of the differential cam 40 rotatably coupled to the vertical portion 14 of the bow body 10, The energy that can be fired can be efficiently stored in the elastic body 62, and when the arrow is fired, much energy is transmitted to the arrow, thereby maximizing the driving force of the arrow.

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 embodiments, but, on the contrary, It is obvious to those who have. Accordingly, such modifications or variations should not be individually understood from the technical spirit and viewpoint of the present invention, and modified embodiments should be included in the claims of the present invention.

10: Bow main body 12:
14: vertical portion 20: upper pulley
22: lower pulley 30: guide pulley
40: Differential cam 42:
44: lobule cam 50, 50U, 50L:
60: Elastic body connecting line 62: Elastic body

Claims

A bow body having a curved portion formed on the front surface and a vertical portion formed on one side of the curved portion;
An upper pulley and a lower pulley rotatably coupled to the upper and lower portions of the curved portion;
A guide pulley rotatably coupled to an upper portion of one side of the curved portion so as to be disposed at a lower portion of the upper pulley;
A differential cam rotatably coupled to a lower portion of the vertical portion;
A ramp whose one end is fixed to the large-leaf sheave of the differential cam and whose other end is fixed to the large-leaf sheave of the differential cam via the guide pulley, the upper pulley and the lower pulley;
An elastic connecting rod having one end fixed to the lobe cam of the differential cam and the other end connected to the elastic body; And
And an elastic body having one end fixed to the vertical portion and the other end fixed to the elastic connection line to provide a predetermined elastic force,
Wherein the guide pulley is guided to remain vertical in the section of the guide pulley and the upper pulley when the ramp is pulled in the direction toward the upper pulley.

The method according to claim 1,
The differential cam
A large-diameter sheave rotatably coupled to the vertical portion and adapted to wind the elevation; And
And a lobed cam formed on one side of the bibulous sheath so that the elastic connection line is wound.

3. The method of claim 2,
Wherein the differential cam is coupled to the vertical portion such that the differential cam is disposed parallel to the ramp past the upper pulley and the lower pulley.

delete

The method according to claim 1,
The elastic connection string may include:
And one end thereof is fixed to a portion having the largest diameter of the lobed cam so as to transmit energy to the differential cam.

6. The method of claim 5,
Wherein the elastic body is formed of a rubber band or a spring.