KR102490116B1 - Cushion plunger for archery - Google Patents

Abstract

The present invention relates to a cushion plunger for archery. According to the present invention, by changing a structure so that a plunger shaft in contact with a shaft penetrates the center of an elastic member, the plunger shaft stably holds the center of the elastic member, even if pressure is applied to the front and rear sides of the elastic member during tension adjustment so that the elastic member deformation can be fundamentally prevented. Through this, the tip of the plunger contacting the shaft always horizontally contacts the shaft to stably compensate for horizontal vibration, thereby inducing stable flight of an arrow and improving a hit rate of the arrow. The cushion plunger for archery includes a sleeve; a plunger shaft; an elastic member; a tension adjusting cylinder; and a tension adjusting housing.

Description

Cushion plunger for archery {CUSHION PLUNGER FOR ARCHERY}

The present invention relates to a cushion plunger for archery, and more particularly, by adjusting the strength of a pressure point to compensate for horizontal vibration generated in a shaft when an arrow is fired from a bow string and accelerated, thereby inducing correct flight of the arrow. It is about a cushion plunger.

In general, archery, a Western-style bow, is an auxiliary device that helps the arrow fired from the bowstring of the main body to fly properly in addition to the main body that shoots the arrow by hanging the arrow on the bowstring, such as a stabilizer and a cushion plunger. used

The double cushion plunger is a device that adjusts the strength of the pressure point. It compensates for the horizontal vibration that occurs in the shaft when an arrow is fired from the bow string and accelerates, creating a paradox in which the arrow leaves the bow string and flies left and right like a fish. ) phenomenon as much as possible to help the arrow fly correctly.

Various examples of such a cushion plunger include Korean Patent Publication No. 10-2017-0121592, Korean Patent Publication No. 10-2016-0063828, US Patent No. 4,697,323, US Patent No. 5,081,980, US Patent No. 5,359,984, It has been proposed in a number of prior documents, including US Patent No. 5,375,584 and Japanese Utility Model Registration No. 20-3175621.

The cushion plunger according to the prior art including the prior art compensates the horizontal vibration of the shaft by adjusting the tension and pressure of the spring provided inside the main body through a screw. In other words, by adjusting the tension of the plunger by rotating the screw in the tightening direction based on the housing to increase the tension of the spring or by rotating the screw in the loosening direction to decrease the spring tension, the arrow left the bowstring flies stably. make it possible

1 is a cross-sectional view schematically showing an example of a cushion plunger according to the prior art.

Referring to FIG. 1, the cushion plunger 10 according to the prior art is built into the sleeve 11 and the sleeve 11, and the tip 12a protrudes to buffer the lateral pressure of the arrow shaft 1 (see FIG. 2) A plunger 12 for doing, a spring 13 built into the sleeve 11 and applying pressure to the plunger 12, a tension adjusting bar 14 for adjusting the tension of the spring 13, and a tension adjusting bar It includes a tension adjusting housing 15 for adjusting the tension of the spring 13 by linearly moving the spring 14.

The operating characteristics of the cushion plunger 10 according to the prior art having such a structure will be described.

When the tension adjusting housing 15 is rotated around the sleeve 11, the tension adjusting bar 14 moves along the sleeve 11 in conjunction with this, and in the process, the tension of the spring 13 is adjusted to level the shaft. By compensating for the vibration, the arrow can fly stably.

However, the cushion plunger 10 according to the prior art has the following problems, which will be described in connection with FIG. 2 . 2 (a) is a normal state, (b) and (c) are views showing a state in which the spring is deformed up and down around the center line (CL).

As shown in (a) of FIG. 2, the arrowhead 1 should be in horizontal contact with the virtual center line CL at the tip of the plunger 12 so that stable flight is possible and the hit rate can be improved. However, in the cushion plunger 10 according to the prior art, a gap (g, see 'A' in FIG. 1) exists between the spring 13 and the sleeve 11 connecting the tension adjusting bar 14 and the plunger 12. ) caused a problem in that the spring 13 is twisted to one side around the center line CL, as shown in (b) and (c) of FIGS. 2 (b) and (c) in the process of adjusting the tension. As a result, the lateral pressure acting on the arrowhead 1 is distorted, making stable shooting difficult and lowering the hit rate of the arrow.

KR 10-2017-0121592 A, 2017. 11. 02. KR 10-2016-0063828 A, 2016. 06. 07. KR 10-2020-0113157 A, 2020. 10. 06. US5375584 B1, 1994. 12. 27

Therefore, the present invention proposes an object to solve the above-mentioned problems of the prior art.

An object of the present invention is to provide a cushion plunger for archery that can improve the hit rate of an arrow by stably compensating for horizontal vibration by always contacting the arrow shaft horizontally with the tip of the plunger contacting the shaft, and inducing stable flight of the arrow therethrough. is to do

In addition, the present invention is not limited to the foregoing purposes, and in addition, various purposes may be further provided through the techniques described through the embodiments and claims to be described later.

The present invention according to an embodiment for achieving the above object is a sleeve; A plunger shaft that buffers the lateral pressure of the shaft through a tip portion exposed to one end of the sleeve; an elastic member built into the sleeve, a front side of which is horizontally engaged with the plunger shaft in the direction of the shaft, and a center portion of which the plunger shaft is penetrated; a tension adjusting cylinder into which a rear portion of the plunger shaft is slidably inserted, and a rear surface of the elastic member is in contact with a front surface to be engaged in a horizontal direction; and tension adjusting the tension of the elastic member by being screwed to the outer surface of the sleeve, rotating the sleeve around an axis, and linearly moving the tension adjusting cylinder along the plunger shaft while linearly moving along the sleeve according to the direction of rotation. A cushion plunger for archery comprising an adjustable housing is provided.

In addition, a ball plunger that enters the hollow of the tension adjusting housing through a fastening hole formed in the tension adjusting housing and is vertically coupled to the tension adjusting groove formed in the rear portion of the sleeve inserted into the tension adjusting housing is further included. can do.

In addition, an alignment key groove may be formed on an outer surface of the sleeve in a horizontally cut surface structure so as to be horizontally parallel to a first tension adjusting groove among tension adjusting grooves formed in the sleeve.

In addition, the tension adjusting cylinder includes an outer ring; an inner ring inserted into the outer ring; And it may include a ball installed between the outer ring and the inner ring.

In addition, the plunger shaft includes a front portion having the tip portion; a rear portion connected to a rear end of the front portion and inserted into the tension adjusting cylinder; and a chin portion formed at a boundary between the front portion and the rear portion, protruding from outer surfaces of the front portion and the rear portion, and being hooked by being in contact with the front surface of the elastic member.

In addition, the sleeve may be formed with an anti-separation projection on the inside of the sleeve to which the chin portion of the plunger shaft supported by the front surface of the elastic member in the direction of the shaft is engaged.

In addition, a fixing nut screwed to an outer surface of the sleeve may be further included.

In addition, the tension adjusting housing may have a prismatic structure when viewed from the direction of the shaft.

In addition, the front and rear surfaces of the elastic member may be polished to have a surface step of 0.3 mm or less, respectively.

As described above, according to the cushion plunger for archery according to the present invention, the plunger shaft in contact with the shaft is changed in structure so that it penetrates the center of the elastic member so that the plunger shaft stably holds the center of the elastic member, thereby providing elasticity during tension adjustment. Even if pressure is applied to the front and rear sides of the member, deformation of the elastic member can be fundamentally prevented.

In addition, according to the cushion plunger for archery according to the present invention, the front and rear surfaces of the elastic member installed between the plunger shaft and the tension adjusting cylinder are precisely polished to closely adhere to the contact surface of the plunger shaft and the tension adjusting cylinder without a surface step as a whole, , Through this, the pressing force applied from the tension adjusting cylinder to the elastic member and from the elastic member to the plunger shaft is transmitted horizontally and stably, so that the tip of the plunger shaft is always in horizontal contact with the shaft to stably compensate for horizontal vibration.

Therefore, through the cushion plunger for archery according to the present invention, the tip of the plunger in contact with the shaft always horizontally contacts the shaft to stably compensate for horizontal vibration, thereby inducing stable flight of the arrow, thereby improving the hit rate of the arrow. can

In addition, according to the cushion plunger for archery according to the present invention, the rear part of the plunger shaft penetrating the elastic member is inserted and coupled, and rotates in a dial manner to adjust the tension of the plunger shaft. By forming the bearing structure, the plunger shaft can be moved more smoothly and smoothly when the plunger shaft moves horizontally and linearly in a sliding manner inside the tension adjusting cylinder during tension adjustment.

In addition, according to the cushion plunger for archery according to the present invention, tension adjustment grooves are formed at regular intervals on the outer surface of the sleeve, the tension is adjusted by rotating the tension adjustment housing in a dial manner, and then the ball plunger is coupled to the tension adjustment housing. By fixing and locking the adjusted tension using , the tension adjustment operation can be performed more smoothly and smoothly.

1 is a cross-sectional view showing an example of a cushion plunger according to the prior art.
Fig. 2 is a view showing spring deformation of the cushion plunger having the structure of Fig. 1;
3 is an assembled perspective view showing a cushion plunger for archery according to an embodiment of the present invention.
4 is an exploded perspective view of the cushion plunger for archery shown in FIG. 3;
5 is an assembled cross-sectional view of the cushion plunger for archery shown in FIG. 3;
Figure 6 is a front view showing the elastic member shown in Figure 4;

Advantages and features of the present invention, and methods for achieving them, will become clear with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below and will be implemented in various different forms.

In this specification, this embodiment is provided to complete the disclosure of the present invention, and to completely inform those skilled in the art of the scope of the invention to which the present invention belongs. And the invention is only defined by the scope of the claims. Thus, in some embodiments, well-known components, well-known operations and well-known techniques have not been described in detail in order to avoid obscuring the interpretation of the present invention.

Also, like reference numerals designate like elements throughout the specification. In addition, the terms used (mentioned) in this specification are for describing the embodiments and are not intended to limit the present invention. In this specification, singular forms also include plural forms unless specifically stated otherwise in a phrase. Also, elements and operations referred to as 'include (or include)' do not exclude the presence or addition of one or more other elements and operations.

Unless otherwise defined, all terms (including technical and scientific terms) used in this specification may be used in a meaning commonly understood by those of ordinary skill in the art to which the present invention belongs. In addition, terms defined in commonly used dictionaries are not interpreted ideally or excessively unless they are defined.

Hereinafter, embodiments of the present invention will be described in detail using the accompanying drawings.

3 is an assembled perspective view schematically shown to explain a cushion plunger for archery according to an embodiment of the present invention, FIG. 4 is an exploded perspective view, and FIG. 5 is an assembled cross-sectional view.

3 to 5, in the archery cushion plunger 20 according to the embodiment of the present invention, the tip portion 221a of the plunger shaft 22 is not twisted around a virtual center line, and the arrow shaft 1 is always horizontally ), it is possible to provide the arrow to fly stably by always stably compensating for the horizontal vibration of the arrow shaft 1 by providing it in contact with.

As shown in (a) of FIG. 2, as a method for ensuring that the tip portion 221a of the plunger shaft 22 is always in horizontal contact with the shaft 1, in the cushion plunger 20 for archery according to the embodiment of the present invention, 2 suggest a way First, the plunger shaft 22 is through-coupled to the elastic member 23 . Second, contact surfaces of both ends of the elastic member 23 that directly contact the plunger shaft 22 and the tension adjusting cylinder 24 are precisely polished to improve surface flatness.

As shown in (b) and (c) of FIG. 2, in the prior art having a structure in which the spring 13 connects between the plunger 12 and the tension adjusting bar 14, in order to adjust the tension due to the nature of the spring 13 When force is applied from the tension adjusting bar 14 in the direction of the plunger 12, a contraction action occurs in the spring 13, and in this process, twisting deformation occurs beyond the center line CL.

To solve this problem, in the cushion plunger 20 for archery according to an embodiment of the present invention, as shown in FIG. 5, the rear part 222 of the plunger shaft 22 is an elastic member 23 made of a compression spring (coil spring). It penetrates and is inserted into and coupled to the tension adjusting cylinder 24.

In the structure in which the plunger shaft 22 is penetrated and coupled to the elastic member 23 as described above, the plunger shaft 22 plays a role in catching the deformation of the elastic member 23 . That is, when pressure is applied to the elastic member 23 between the plunger shaft 22 and the tension adjusting cylinder 24 and the elastic member 23 is about to be deformed by the pressing force, the plunger shaft 22 is the elastic member ( 23) is prevented from being twisted and deformed by holding the center so that the elastic member 23 is not deformed.

On the other hand, in the prior art, since the spring 13 does not have a central axis as shown in FIG. 1, when pressure is applied to the spring 13 between the plunger 12 and the tension adjusting bar 14, the spring 13 is applied Although distortion deformation may occur in the space formed due to the separation (g) by the pressing force, such deformation does not occur in the embodiment of the present invention.

On the other hand, in the present invention, to maintain the plunger shaft 22 horizontally, the sleeve 21 and the tension adjusting cylinder 24 are assembled and installed in a horizontally aligned state. That is, the front part 221 of the plunger shaft 22 is tightly coupled to the inside of the sleeve 21, and the rear part 222 is closely inserted into the tension adjusting cylinder 24. At this time, as the sleeve 21 and the tension adjusting cylinder 24 are assembled and installed in a horizontally aligned state, the plunger shaft 22 may be maintained horizontally between the sleeve 21 and the tension adjusting cylinder 24.

Figure 6 is a front view schematically showing the elastic member shown in Figure 4;

5 and 6, the elastic member 23 according to the present invention is a compression spring, and is installed between the jaw 223 of the plunger shaft 22 and the front face 24a of the tension adjusting cylinder 24.

The front surface 23a of the elastic member 23 closely contacts the rear surface of the jaw 223 of the plunger shaft 22, and the rear surface 23b closely contacts the front surface 24a of the tension adjusting cylinder 24. . At this time, when the elastic member 23 is pressed, the entire surface of the front surface 23a uniformly comes into close contact with the jaw 223a of the plunger shaft 22, and the entire surface of the rear surface 23b uniformly adjusts the tension as a whole. It should be in close contact with the front surface 24a of the cylinder 24.

To this end, the elastic member 23 is precisely polished so that the front surface 23a is in close horizontal contact with the jaw 223 of the plunger shaft 22, and the rear surface 23b is also the front surface of the tension adjusting cylinder 24 ( 24a) is precisely polished so that it does not distort when in close contact.

The front surface 23a and the rear surface 23b of the elastic member 23 may be polished to have a surface step of 0.3 mm or less, preferably 0.2 mm or less, and more preferably 0.1 mm or less.

As shown in FIG. 4 , the plunger shaft 22 according to an example of the present invention increases the degree of adhesion between the sleeve 21 and the elastic member 23 to prevent shaking during horizontal (left and right) linear reciprocating motion.

The plunger shaft 22 may be made of stainless steel that is resistant to corrosion and oxidation. The plunger shaft 22 includes a front part 221 and a rear part 222 formed of, for example, a round bar. And, at the boundary between the front part 221 and the rear part 222, a jaw part 223 formed in a circular ring shape protrudes from the outer surfaces of the front part 221 and the rear part 222.

The front part 221 and the rear part 222 may be integrally formed as a round bar. The jaw portion 223 may be formed by fastening separately manufactured circular rings to the front portion 221 and the rear portion 222 . And, the front part 221 may be formed to have a larger outer diameter than the rear part 222 .

4 and 5, in the tension adjusting cylinder 24 according to one embodiment of the present invention, the front surface 24a to which the rear surface 23b of the elastic member 23 is in close contact has a uniform flatness without a surface step. It is made of a flat surface having an elastic member 23 in close contact with the rear surface 23b without a step, so that the elastic member 23 can be stretched horizontally without twisting.

As shown in FIG. 5 , the rear portion 222 of the plunger shaft 22 is inserted into the tension adjusting cylinder 24 so as to be slidably movable in the longitudinal direction of the tension adjusting cylinder 24 . In this way, the plunger shaft 22 can move in a straight line horizontally through the tension adjusting cylinder 24 without shaking as the rear portion 222 is inserted into and coupled to the tension adjusting cylinder 24 .

The tension adjusting cylinder 24 may be formed of, for example, a ball bearing including an outer race 241, an inner race 242, and a ball 243 installed between the outer race 241 and the inner race 242. At this time, the contact surfaces of the outer race 241 and the inner race 242 in contact with the rear surface 23b of the elastic member 23 are formed flat without a surface step to prevent twisting of the elastic member 23 as described above.

In addition, the outer ring 241 may be formed of stainless steel that is resistant to corrosion and oxidation, and the inner ring 242 may be formed of a synthetic resin material that is resistant to corrosion. Through this, it is possible to provide a supporting force and provide a smooth movement during the sliding movement of the plunger shaft 22 .

Meanwhile, as the tension adjusting cylinder 24, a ball bearing having a structure in which a part of the ball penetrates the inner ring and protrudes into the hollow of the tension adjusting cylinder 24 may be used. In this case, when the plunger shaft 22 slidingly inserted into the hollow of the tension adjusting cylinder 24 slides along the hollow of the tension adjusting cylinder 24, it directly contacts the ball protruding through the inner ring, thereby contributing to the rolling motion of the ball. Due to this, it can move more smoothly and smoothly.

As shown in FIG. 3 , the sleeve 21 according to an example of the present invention is a screw-type sleeve having a thread formed on the outer surface, and includes a front portion 211 and a rear portion 212 having different outer diameters.

As shown in FIG. 4, threads are formed on the outer surfaces of the front part 211 and the rear part 212, respectively. In addition, an alignment key groove 212a formed of a horizontal cut surface may be formed on one side of the outer surface of the rear portion 212 to easily check the tension adjustment position of the cushion plunger 20 for archery.

A screw thread into which the tension adjusting housing 25 is screwed is formed on the outer surface of the rear portion 212 of the sleeve 21 . And, when tension is adjusted in the dial method through the tension adjusting housing 25 on the rear part 212, tension is applied at regular intervals orthogonal to the direction of rotation of the thread formed on the rear part 212 in order to uniformly adjust the tension adjustment value. An adjustment groove 212b is formed.

A plurality of tension adjusting grooves 212b are formed at regular intervals in the direction of rotation of the sleeve 21 . The tension of the elastic member 23 may be determined based on the position of the tension adjusting groove 212b to which the ball 26a of the ball plunger 26 is coupled, and thus the strength of the presser point of the arrow may be finely adjusted.

Meanwhile, the first tension adjusting groove among the tension adjusting grooves 212b may be formed parallel to the alignment key groove 212a of the sleeve 21 so that the archer can easily recognize the size of the adjusted tension. Alternatively, a zero point (scale) may be displayed corresponding to the first tension adjusting groove. Based on this, the archer can easily recognize the strength of the presser point of the arrow currently being adjusted corresponding to the tension adjusting groove located in the clockwise or counterclockwise direction.

3 and 4, the tension adjusting housing 25 has a hollow 25a to which the sleeve 21 is coupled. Further, a screw thread is formed on the inner circumferential surface of the hollow 25a to be screwed with the screw thread formed on the rear portion 212 of the sleeve 21 . Thus, the tension adjusting housing 25 can linearly reciprocate along the sleeve 21 according to the rotational direction through screwing with the sleeve 21 . For example, when rotated in the tightening direction, the sleeve 21 moves leftward in FIG. 5 , and when rotated in the loosening direction, the sleeve 21 moves rightward in FIG. 5 .

As shown in FIG. 5 , the rear end of the tension adjusting housing 25 may be sealed. This is to prevent foreign matter or the like from being introduced into the tension adjusting housing 25 . In addition, the tension adjusting cylinder 24 inserted into the hollow 25a of the tension adjusting housing 25 is supported on the inner surface of the closed rear end of the rear end 24b of the tension adjusting housing 25 in the right direction in FIG. Accordingly, as the tension adjusting housing 25 moves, the tension adjusting cylinder 24 inserted therein also moves in the horizontal direction in conjunction with the movement of the tension adjusting housing 25 .

As shown in FIG. 4 , a fastening hole 25b into which a ball plunger 26 fixing the tension adjusting housing 25 to the sleeve 21 is inserted and fastened is formed at an upper portion of the tension adjusting housing 25 .

The ball plunger 26 may be fastened and fixed to the fastening hole 25b through the nut N and the washer W.

As shown in FIG. 5 , the fastening hole 25b is formed to communicate with the hollow 25a of the tension adjusting housing 25 . A ball 26a is installed at the lower end of the ball plunger 26 coupled to the fastening hole 25b so that when the ball 26a is caught in the tension adjusting groove 212b, it is caught more smoothly during tension adjustment.

Meanwhile, as shown in FIG. 3 , a fixing nut 27 for mounting the cushion plunger 20 to the bow may be installed in the sleeve 21 . The fixing nut 27 can be formed, for example, through aluminum anodizing, and as shown in FIGS. 4 and 5, a screw thread is formed on the inner circumferential surface of the hollow 27a to be screwed into the screw thread formed on the outer surface of the sleeve 21 and moves left and right along the sleeve 21 according to the direction of rotation. In addition, a fastening hole 27b into which a locking screw (not shown) is fastened is formed at the upper part to be fixed to the sleeve 21 at a predetermined position.

The tension adjusting housing 25 may have a prismatic (eg, triangular) structure when viewed from the tip portion 221a of the plunger shaft 22 so as not to slip while improving the grip of the finger when adjusting the tension. The fixing nut 27 may also be made of a triangular structure in consideration of grip and the like.

Hereinafter, operating characteristics of the cushion plunger 20 for archery according to an embodiment of the present invention will be described.

As shown in FIG. 5, in order to adjust the strength of the presser point of the arrow, when the tension adjusting housing 25 is rotated in the tightening direction (clockwise) around the sleeve 21, the tension adjusting housing 25 rotates the sleeve ( 21) to the left. The tension adjusting cylinder 24 moves in conjunction with the tension adjusting housing 25 and is guided by the tension adjusting housing 25, and the rear side of the elastic member 23 is pressed according to the movement of the tension adjusting cylinder 24 to increase tension. This increases, and the strength of the presser point of the arrow increases in response to the increase in the tension of the elastic member 23.

Conversely, when the tension adjusting housing 25 is rotated in the loosening direction (counterclockwise direction), the tension adjusting housing 25 moves rightward. In conjunction with this, the tension adjusting cylinder 24 is pushed to the right by the elastic restoring force of the elastic member 23 . Accordingly, the pressing force applied to the elastic member 23 is reduced or eliminated, and thus the tension is reduced. Corresponding to the decrease in the tension of the elastic member 23, the strength of the presser point of the arrow is reduced.

As above, although preferred embodiments of the present invention have been described and illustrated using specific terms, such terms are only intended to clarify the present invention. And, it is obvious that various changes and changes can be made to the embodiments of the present invention and the described terms without departing from the technical spirit and scope of the following claims. Such modified embodiments should not be individually understood from the spirit and scope of the present invention, and should be said to fall within the scope of the claims of the present invention.

1: arrow shaft 10, 20: cushion plunger
11: sleeve 12: plunger
13: spring 14: tension adjustment bar
15: tension adjustment housing 21: sleeve
21a: departure prevention bump 22: plunger shaft
23: elastic member 22a: tip part
23a: front 23b: rear
24: tension adjusting cylinder 24a: front
24b: rear 25: tension adjustment housing
25a, 27a: hollow 25b, 27b: fastening hole
26: ball plunger 26a: ball
27a: hollow 27b: fastening hole
211, 221: front part 221a: tip part
212, 222: rear part 212a: alignment keyway
212b: tension adjustment groove 223: jaw
241: outer ring 242: inner ring
243: ball

Claims (9)

sleeve;
A plunger shaft that buffers the lateral pressure of the shaft through a tip portion exposed to one end of the sleeve;
an elastic member built into the sleeve, the front surface of which is horizontally engaged with the plunger shaft in the direction of the shaft, and coupled to the plunger shaft so that the plunger shaft passes from one side to the other;
a tension adjusting cylinder into which a rear portion of the plunger shaft is slidably inserted, and a rear surface of the elastic member is in contact with a front surface to be engaged in a horizontal direction; and
Tension adjustment that adjusts the tension of the elastic member by screwing to the outer surface of the sleeve, rotating the sleeve around an axis, and linearly moving the tension adjusting cylinder along the plunger shaft while linearly moving along the sleeve according to the direction of rotation. housing; including,
The plunger shaft,
a front portion having the tip portion;
a rear portion connected to a rear end of the front portion, coupled to the elastic member so as to pass through the center from one side to the other side of the elastic member, and inserted into the tension adjusting cylinder; and
a jaw portion formed at a boundary between the front portion and the rear portion, protruding from outer surfaces of the front portion and the rear portion, and holding the front surface of the elastic member; including,
The elastic member is located between the jaw of the plunger shaft and the front of the tension adjusting cylinder in a state in which the rear portion of the plunger shaft is through-coupled.
Cushion plunger for archery.
According to claim 1,
For archery further comprising a ball plunger that enters the hollow of the tension adjusting housing through the fastening hole formed in the tension adjusting housing and is vertically coupled to the tension adjusting groove formed on the rear side of the sleeve inserted into the tension adjusting housing. cushion plunger.
According to claim 2,
The sleeve is a cushion plunger for archery in which an alignment keyway is formed on an outer surface of the sleeve in a horizontal cut surface structure so as to be horizontally parallel to the first tension adjusting groove among the tension adjusting grooves formed in the sleeve.
According to claim 1,
The tension adjusting cylinder,
paddle;
an inner ring inserted into the outer ring;
a ball installed between the outer race and the inner race;
A cushion plunger for archery comprising a.
delete According to claim 1,
The sleeve is a cushion plunger for archery formed with an anti-separation jaw on the inside of which the jaw portion of the plunger shaft in which the front surface of the elastic member is supported in the direction of the arrow shaft is engaged.
According to claim 1,
Cushion plunger for archery further comprising a fixing nut screwed to the outer surface of the sleeve.
According to claim 1,
The tension adjusting housing is a cushion plunger for archery made of a prismatic structure when viewed from the arrow shaft direction.
According to claim 1,
The cushion plunger for archery wherein the front and rear surfaces of the elastic member are polished to have a surface step of 0.3 mm or less, respectively.

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