WO2020122515A1 - Tennis practice device - Google Patents

Tennis practice device Download PDF

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Publication number
WO2020122515A1
WO2020122515A1 PCT/KR2019/017260 KR2019017260W WO2020122515A1 WO 2020122515 A1 WO2020122515 A1 WO 2020122515A1 KR 2019017260 W KR2019017260 W KR 2019017260W WO 2020122515 A1 WO2020122515 A1 WO 2020122515A1
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Prior art keywords
tennis
ball
string
tennis ball
handle
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PCT/KR2019/017260
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French (fr)
Korean (ko)
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문태현
문용훈
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문태현
문용훈
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Publication of WO2020122515A1 publication Critical patent/WO2020122515A1/en

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    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B43/00—Balls with special arrangements
    • A63B43/007—Arrangements on balls for connecting lines or cords
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B69/00—Training appliances or apparatus for special sports
    • A63B69/38—Training appliances or apparatus for special sports for tennis
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B2102/00—Application of clubs, bats, rackets or the like to the sporting activity ; particular sports involving the use of balls and clubs, bats, rackets, or the like
    • A63B2102/02—Tennis
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B2225/00—Miscellaneous features of sport apparatus, devices or equipment
    • A63B2225/09—Adjustable dimensions

Definitions

  • the present invention relates to a tennis practice apparatus, and more specifically, to a tennis practice apparatus having a simple configuration capable of producing an effect similar to hitting a real tennis ball in practicing swing practice of tennis.
  • Republic of Korea Patent Application No. 10-2012-0042332 is a collection unit provided to collect tennis balls that fell on the ground; And a shooting unit which is detachably coupled to the collection unit and is provided to launch the tennis ball collected from the collection unit.
  • the device is scaled and is not suitable for practicing anytime, anywhere.
  • Republic of Korea Utility Model Registration No. 10-2012-0078638 is also a court body that is hit by a tennis ball by the user's swing, and a rebounder that guides the ball hitting the court body as well as decelerates, and from the court body
  • a tennis exercise device consisting of a throwing device that flips the sent tennis ball and sends it to the user, it has the above problems.
  • the present invention has an object to provide a tennis practice mechanism that allows you to practice swing of tennis anytime, anywhere, alone or with a helper. More specifically, it is an object of the present invention to provide a tennis exercise apparatus that is simple in configuration, can be used non-electrically, and is portable, so that there are few restrictions on the practice place and various swing exercises can be performed.
  • the above purpose is, tennis ball; One end is connected to the tennis ball connection string; It is achieved by a tennis exercise device comprising a; handle installed on the other end of the connecting string.
  • the connecting strap may be partially or entirely made of an elastic member so as to be elastically stretched.
  • the connecting strap may be capable of adjusting the length.
  • the handle has a cylindrical shape; Furthermore, the connecting string may be rotatably installed around the axis.
  • the dome-shaped cover cap is fixed to the surface of the tennis ball by adhesion;
  • the end of the extension portion of the connecting string is extended in the form of a disc, and is covered by the cover cap;
  • the adhesive member may be provided with a boundary portion between the cover cap and the connection string.
  • the adhesive member may be a glue that can be applied by a glue gun.
  • the practitioner when the assistant holds the handle and throws the tennis ball toward the practitioner, the practitioner can practice swinging by accepting the ball.
  • the practitioner can perform a sub-practice by throwing a tennis ball with his hand without holding the racket.
  • FIG. 1 is a perspective view of a tennis exercise apparatus according to an embodiment of the present invention.
  • FIG. 2 is a cross-sectional view of a tennis ball and a connection string of a tennis exercise apparatus according to an embodiment of the present invention.
  • FIG 3 is a cross-sectional view of a tennis ball and a connection string of a tennis exercise apparatus according to another embodiment of the present invention.
  • Figure 4 is a cross-sectional view of the handle portion of the tennis exercise device according to an embodiment of the present invention.
  • the tennis exercise apparatus includes a tennis ball 10, a connection string 20 having one end connected to the tennis ball 10, and a handle 30 installed at the other end of the connection string 20.
  • the tennis ball 10 is the same as a general tennis ball. However, the air pressure can be slightly less than that of a tennis ball for competition, which is intended to reduce the reaction force somewhat for beginners.
  • the length of the connecting string 20 may be 50 to 200 cm. It is sufficient if it is possible to control the tennis ball 10 by holding the handle 30.
  • the connecting strap 20 may be configured to be adjustable in length.
  • the extension portion 21 of the connecting strap 20 may be partially or entirely made of an elastic member so as to stretch elastically.
  • the connecting string 20 may be provided with a material and thickness similar to a rope skipping rope, but in some cases, a wire or a fishing line may be used.
  • the handle 30 has a cylindrical shape with a diameter that is easy to hold by hand.
  • the handle 30 may have a protrusion for preventing slipping.
  • the handle 30 may have a structure as shown in FIG. 4 and be rotatably installed with the connection string 20 as an axial center.
  • connection string 20 is fixed by adjusting knots 26 in the inner space of the handle 30 after passing through the through hole 31 provided in the front plate of the handle 30.
  • the length of the connecting string 20 may be adjusted by changing the position of the knot by pulling out the end of the connecting string 20 through the open end of the handle 30.
  • the tennis ball 10 is composed of a rubber ball 11 having elasticity and a felt 12 in the form of a nonwoven fabric bonded to the surface of the rubber ball 11.
  • 2 is a configuration for connecting the connecting string 20 without making a hole in the tennis ball 10
  • Figure 3 shows a configuration for fitting a connecting string 20 to make a hole 13 in the tennis ball 10 .
  • the dome-shaped cover cap 23 is fixed to the surface of the rubber ball 11 of the tennis ball 10 by adhesion.
  • the end of the extension portion 21 of the connecting string 20 is extended in the form of a disc 22 like a head of a tack, and covered by a cover cap 23.
  • an adhesive member 24 such as a glue or a glue gun is provided with a boundary portion between the cover cap 23 and the connection string 20 to maintain stable coupling thereof. .
  • the end of the connecting string 20 can be fitted through the hole 13 provided in the rubber ball 11 of the tennis ball and then fixed with the finishing knot 25.
  • the hole 13 is drilled in the tennis ball, the connection string 20 is knotted, and the hole 13 is pressed into the hole 13 and fixed. It can be fixed by applying an adhesive to the hole 13 or by fixing the fixing cap with an adhesive.
  • the tennis ball 10 may use a general tennis ball, but the rubber ball 11 may be made of a material having better elasticity and a thicker thickness. This is to make the elasticity better and to keep the connection with the connection string stable. It is desirable to be able to select elasticity or string length according to the skill of the practitioner.

Abstract

The present invention relates to a tennis practice device which has a simple configuration and can provide an effect similar to that of hitting a real tennis ball when practicing tennis strokes. The tennis practice device is characterized by comprising: a tennis ball; a connecting string having one end connected to the tennis ball; and a handle attached to the other end of the connecting string.

Description

테니스 연습기구Tennis practice equipment
본 발명은 테니스 연습기구에 관한 것이며, 좀 더 구체적으로는 테니스의 스윙연습을 함에 있어서 실제 테니스공을 타격하는 것과 유사한 효과를 낼 수 있는 간단한 구성의 테니스 연습기구에 관한 것이다.The present invention relates to a tennis practice apparatus, and more specifically, to a tennis practice apparatus having a simple configuration capable of producing an effect similar to hitting a real tennis ball in practicing swing practice of tennis.
운동실력은 많은 연습량에 비례하여 증대된다. 테니스도 예외는 아닐 것이다. 그러나 테니스와 같은 스포츠는 상대방이 있는 운동기구로서 혼자서 연습하는 것은 한계가 있다. 그리고 테니스라켓의 스윙연습을 실제 공을 이용하여 하는 경우에는 더 좋은 효과를 볼 수 있다. 그러나 실제 공을 이용하여 스윙연습을 하는 것은 쉽지 안하. 개인 지도자가 있는 경우에도 많은 공을 사용해야 하므로 부담스러운 것이 사실이며 연습장소에도 제한이 따른다. 그래서 실제 공을 이용하여 서브, 스매싱 등의 스윙연습을 제대로 수행하기는 어려워진다. 이러한 문제에 대하여 테니스 연습장치가 제공된 바 있다.Exercise skills increase in proportion to many exercises. Tennis is no exception. However, sports such as tennis are limited exercise equipment with their opponents. And if you practice the practice of tennis racket using a real ball, you can see a better effect. However, it is not easy to practice swing using an actual ball. Even if there is an individual leader, it is a burden because many balls have to be used. Therefore, it is difficult to perform swing exercises such as serve and smashing properly using an actual ball. A tennis exercise device has been provided for this problem.
대한민국 특허출원 제10-2012-0042332호는 지면에 떨어진 테니스공이 수거되도록 마련된 수거부; 및 수거부에 착탈 가능하게 결합되어 상기 수거부에서 수거된 테니스공이 발사되도록 마련된 슈팅부를 포함하는 테니스 연습장치를 제안한다. 그러나 본 장치는 규모가 있으며 언제 어디서든 연습하기에 적당하지는 않다.Republic of Korea Patent Application No. 10-2012-0042332 is a collection unit provided to collect tennis balls that fell on the ground; And a shooting unit which is detachably coupled to the collection unit and is provided to launch the tennis ball collected from the collection unit. However, the device is scaled and is not suitable for practicing anytime, anywhere.
대한민국 실용신안등록출원 제10-2012-0078638호 역시 사용자의 스윙에 의해 테니스 볼의 타격을 받는 코트 바디와, 상기 코트 바디를 타격한 볼을 감속시킴과 아울러 안내하는 리바운더와, 상기 코트 바디로부터 보내진 상기 테니스 볼을 튀겨 상기 사용자 측으로 보내는 송구장치로 이루어지는 테니스 연습장치로서, 위와 같은 문제를 가진다.Republic of Korea Utility Model Registration No. 10-2012-0078638 is also a court body that is hit by a tennis ball by the user's swing, and a rebounder that guides the ball hitting the court body as well as decelerates, and from the court body As a tennis exercise device consisting of a throwing device that flips the sent tennis ball and sends it to the user, it has the above problems.
위와 같은 문제에 대하여 본 발명은 혼자서 또는 도우미와 함께 언제 어디서나 테니스의 스윙 연습을 할 수 있도록 하는 테니스 연습기구를 제공하는 것에 목적이 있다. 좀 더 구체적으로는 구성이 간단하고 비전기식으로 사용할 수 있으며 휴대가 가능하여 연습장소에 대한 제한이 적으며 다양한 스윙연습을 수행할 수 있도록 하는 테니스 연습기구를 제공하는 것에 본 발명의 목적이 있다.With respect to the above problems, the present invention has an object to provide a tennis practice mechanism that allows you to practice swing of tennis anytime, anywhere, alone or with a helper. More specifically, it is an object of the present invention to provide a tennis exercise apparatus that is simple in configuration, can be used non-electrically, and is portable, so that there are few restrictions on the practice place and various swing exercises can be performed.
위와 같은 목적은, 테니스공; 일단이 상기 테니스공에 연결되는 연결끈; 상기 연결끈의 타단에 설치되는 손잡이;를 포함하는 것을 특징으로 하는 테니스 연습기구에 의해 달성된다.The above purpose is, tennis ball; One end is connected to the tennis ball connection string; It is achieved by a tennis exercise device comprising a; handle installed on the other end of the connecting string.
본 발명의 특징에 의하면, 상기 연결끈은 탄성적으로 늘어날 수 있도록 부분적으로 또는 전체적으로 탄성부재로 되어 있을 수 있다.According to a feature of the present invention, the connecting strap may be partially or entirely made of an elastic member so as to be elastically stretched.
본 발명의 또 다른 특징에 의하면, 상기 연결끈은 길이 조정이 가능하게 되어 있을 수 있다.According to another feature of the invention, the connecting strap may be capable of adjusting the length.
본 발명의 또 다른 특징에 의하면, 상기 손잡이는 원통형상으로 되어 있으며; 나아가 상기 연결끈을 축중심으로 하여 회전 가능하게 설치될 수 있다.According to another feature of the invention, the handle has a cylindrical shape; Furthermore, the connecting string may be rotatably installed around the axis.
본 발명의 또 다른 특징에 의하면, 상기 테니스공의 표면에 돔형태의 커버캡이 접착으로 고정되어 있으며; 상기 연결끈의 연장부 끝은 원판 형태로 확장되어 있으며, 상기 커버캡에 의해 덮여 있고; 접착부재가 상기 커버캡과 연결끈의 경계부위가 설치되어 있을 수 있다. 여기서 접착부재는 글루건에 의해 적용시킬 수 있는 아교일 수 있다.According to another feature of the invention, the dome-shaped cover cap is fixed to the surface of the tennis ball by adhesion; The end of the extension portion of the connecting string is extended in the form of a disc, and is covered by the cover cap; The adhesive member may be provided with a boundary portion between the cover cap and the connection string. Here, the adhesive member may be a glue that can be applied by a glue gun.
본 발명의 특징에 의하면, 도우미가 손잡이를 잡고서 테니스공을 연습자를 향해 뿌리듯 던지면 연습자는 이 공을 받아침으로써 스윙연습을 할 수 있게 된다. 연습자는 혼자서도 라켓을 잡지 않은 손으로 테니스공을 던짐으로써 서브 연습을 할 수 있다.According to a feature of the present invention, when the assistant holds the handle and throws the tennis ball toward the practitioner, the practitioner can practice swinging by accepting the ball. The practitioner can perform a sub-practice by throwing a tennis ball with his hand without holding the racket.
이와 같이 매우 간단한 구성의 기구를 이용하여 효과적으로 테니스 연습을 수행할 수 있게 된다. 부피가 작으므로 휴대가 가능하여 언제 어디서나 테니스 연습을 할 수 있게 된다.It is possible to effectively perform tennis practice using such a very simple configuration. The small volume makes it portable and allows you to practice tennis anytime, anywhere.
도 1은 본 발명의 실시예에 의한 테니스 연습기구의 사시도이다.1 is a perspective view of a tennis exercise apparatus according to an embodiment of the present invention.
도 2는 본 발명의 실시예에 의한 테니스 연습기구의 테니스공과 연결끈의 단면도이다.2 is a cross-sectional view of a tennis ball and a connection string of a tennis exercise apparatus according to an embodiment of the present invention.
도 3은 본 발명의 다른 실시예에 의한 테니스 연습기구의 테니스공과 연결끈의 단면도이다.3 is a cross-sectional view of a tennis ball and a connection string of a tennis exercise apparatus according to another embodiment of the present invention.
도 4는 본 발명의 실시예에 의한 테니스 연습기구의 손잡이 부위의 단면도이다.Figure 4 is a cross-sectional view of the handle portion of the tennis exercise device according to an embodiment of the present invention.
이하, 명세서에 첨부된 도면을 참조하여 본 발명의 실시예를 상세하게 설명한다. 우선 도 1 내지 도 2를 참조하여 본 발명의 일실시예를 설명한다. 이후 다른 도면을 인용하면서 다른 실시예를 설명한다.Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. First, an embodiment of the present invention will be described with reference to FIGS. 1 to 2. Hereinafter, other embodiments will be described with reference to other drawings.
본 고안에 의한 테니스 연습기구는 테니스공(10), 일단이 상기 테니스공(10)에 연결되는 연결끈(20), 및 연결끈(20)의 타단에 설치되는 손잡이(30)를 포함한다.The tennis exercise apparatus according to the present invention includes a tennis ball 10, a connection string 20 having one end connected to the tennis ball 10, and a handle 30 installed at the other end of the connection string 20.
테니스공(10)은 일반적인 테니스공과 같은 것이 이용된다. 다만 공기압은 경기용 테니스공보다 조금 적게 할 수 있는데, 이는 초보자를 위하여 반발력을 다소 줄이기 위한 것이다.The tennis ball 10 is the same as a general tennis ball. However, the air pressure can be slightly less than that of a tennis ball for competition, which is intended to reduce the reaction force somewhat for beginners.
연결끈(20)의 길이는 50 ~ 200cm가 될 수 있다. 손잡이(30)를 잡고서 테니스공(10)을 콘트롤할 수 있는 정도면 족하다. 연결끈(20)은 길이 조정이 가능하게 구성될 수 있다.The length of the connecting string 20 may be 50 to 200 cm. It is sufficient if it is possible to control the tennis ball 10 by holding the handle 30. The connecting strap 20 may be configured to be adjustable in length.
본 발명의 특징에 의하면, 상기 연결끈(20)의 연장부(21)는 탄성적으로 늘어날 수 있도록 부분적으로 또는 전체적으로 탄성부재로 되어 있을 수 있다. 연결끈(20)은 줄넘기끈과 유사한 소재와 두께로 제공될 수도 있으나, 경우에 따라서는 와이어 또는 낚시줄이 사용될 수 있다.According to a feature of the present invention, the extension portion 21 of the connecting strap 20 may be partially or entirely made of an elastic member so as to stretch elastically. The connecting string 20 may be provided with a material and thickness similar to a rope skipping rope, but in some cases, a wire or a fishing line may be used.
손잡이(30)는 손으로 쥐기 편한 직경을 갖는 원통형상으로 되어 있다. 손잡이(30)는 미끄럼 방지를 위한 돌기를 가질 수 있다. 나아가 손잡이(30)는 도 4에 도시된 바와 같은 구조를 가짐으로써 연결끈(20)을 축중심으로 하여 회전 가능하게 설치될 수 있다.The handle 30 has a cylindrical shape with a diameter that is easy to hold by hand. The handle 30 may have a protrusion for preventing slipping. Furthermore, the handle 30 may have a structure as shown in FIG. 4 and be rotatably installed with the connection string 20 as an axial center.
도시된 바에 의하면 연결끈(20)은 손잡이(30)의 전방판에 마련된 통과공(31)을 관통한 다음 손잡이(30) 내부 공간에서 조정매듭(26)으로써 고정된다. 또 이러한 구성에 의하면, 손잡이(30)의 개방된 단부를 통해 연결끈(20)의 끝을 빼내어 매듭의 위치를 변경함으로써 연결끈(20)의 길이를 조정할 수 있을 것이다.According to the illustrated connection string 20 is fixed by adjusting knots 26 in the inner space of the handle 30 after passing through the through hole 31 provided in the front plate of the handle 30. In addition, according to this configuration, the length of the connecting string 20 may be adjusted by changing the position of the knot by pulling out the end of the connecting string 20 through the open end of the handle 30.
이하에서는 테니스공(10)과 연결끈(20)의 연결방식에 대한 실시예를 도 2와 도 3을 차례로 참조하며 설명한다. 주지하는 바와 같이 테니스공(10)은 탄력을 가지는 고무공(11)과 고무공(11)의 표면에 접착되어 있는 부직포 형태의 펠트(12)로 구성된다. 도 2는 테니스공(10)에 구멍을 내지 않고서 연결끈(20)을 연결하는 구성이며, 도 3은 테니스공(10)에 구멍(13)을 내고 연결끈(20)을 끼우는 구성을 제시한다.Hereinafter, an embodiment of the connection method of the tennis ball 10 and the connection string 20 will be described with reference to FIGS. 2 and 3 in turn. As is well known, the tennis ball 10 is composed of a rubber ball 11 having elasticity and a felt 12 in the form of a nonwoven fabric bonded to the surface of the rubber ball 11. 2 is a configuration for connecting the connecting string 20 without making a hole in the tennis ball 10, Figure 3 shows a configuration for fitting a connecting string 20 to make a hole 13 in the tennis ball 10 .
도 2에 도시된 바에 의하면, 테니스공(10)의 고무공(11) 표면에 돔형태의 커버캡(23)이 접착으로 고정되어 있다. 연결끈(20)의 연장부(21) 끝은 압정의 머리처럼 원판(22) 형태로 확장되어 있으며, 커버캡(23)에 의해 덮여있다. 커버캡(23)의 구멍이 벌어지는 것을 방지하기 위하여 아교, 글루건과 같은 접착부재(24)가 커버캡(23)과 연결끈(20)의 경계부위가 설치되어 이들의 안정적인 결합을 유지하도록 하고 있다.2, the dome-shaped cover cap 23 is fixed to the surface of the rubber ball 11 of the tennis ball 10 by adhesion. The end of the extension portion 21 of the connecting string 20 is extended in the form of a disc 22 like a head of a tack, and covered by a cover cap 23. In order to prevent the holes of the cover cap 23 from opening, an adhesive member 24 such as a glue or a glue gun is provided with a boundary portion between the cover cap 23 and the connection string 20 to maintain stable coupling thereof. .
도 3에 도시된 바에 의하면, 연결끈(20)의 단부가 테니스공의 고무공(11)에 마련한 구멍(13)을 관통하여 끼워진 다음 마감매듭(25)으로 고정될 수 있다. 테니스공에 구멍(13)을 천공하고, 연결끈(20)을 매듭진 다음 그 구멍(13)에 압입하여 밀어넣고 고정시킨다. 구멍(13) 부위에 접착제를 바르거나 또는 고정캡을 접착제로써 접착함으로써 고정시킬 수 있다.As shown in FIG. 3, the end of the connecting string 20 can be fitted through the hole 13 provided in the rubber ball 11 of the tennis ball and then fixed with the finishing knot 25. The hole 13 is drilled in the tennis ball, the connection string 20 is knotted, and the hole 13 is pressed into the hole 13 and fixed. It can be fixed by applying an adhesive to the hole 13 or by fixing the fixing cap with an adhesive.
테니스공(10)은 일반 테니스공을 이용할 수도 있지만, 고무공(11)이 탄성이 더 좋고 두께가 더 두꺼운 소재로 된 것을 이용할 수도 있다. 탄력을 더 좋게 하고 연결끈과의 안정적은 연결을 유지할 수 있도록 하기 위함이다. 연습자의 숙련도에 따라서 탄성이나 끈길이를 선택할 수 있도록 하면 바람직하다.The tennis ball 10 may use a general tennis ball, but the rubber ball 11 may be made of a material having better elasticity and a thicker thickness. This is to make the elasticity better and to keep the connection with the connection string stable. It is desirable to be able to select elasticity or string length according to the skill of the practitioner.
이상에서 설명된 것들은 본 발명의 기술적 사상에 의거한 몇가지 예시에 불과하다. 당업자는 청구범위를 통해 표현되는 본 발명의 기술적 사상의 범위를 넘지 않는 선에서 예시된 바를 활용하여 다양한 변형실시를 할 수 있을 것이다. 예를 들어 위에 설명된 모든 실시예들은 당업자에 의해 자유롭게 조합되어 실시될 수 있으며 어떠한 조합이든지 본 발명의 권리범위에 포함된다고 해석되어야 한다.What has been described above is only a few examples based on the technical idea of the present invention. Those skilled in the art will be able to carry out various modifications by utilizing the exemplified in a line not exceeding the scope of the technical idea of the present invention expressed through the claims. For example, all the embodiments described above can be freely combined and implemented by those skilled in the art, and any combination should be interpreted as being included in the scope of the present invention.

Claims (5)

  1. 테니스공; Tennis ball;
    일단이 상기 테니스공에 연결되는 연결끈; One end is connected to the tennis ball connection string;
    상기 연결끈의 타단에 설치되는 손잡이;A handle installed at the other end of the connection string;
    를 포함하는 것을 특징으로 하는 테니스 연습기구.Tennis practice equipment comprising a.
  2. 제1항에 있어서, 상기 연결끈은 탄성적으로 늘어날 수 있도록 부분적으로 또는 전체적으로 탄성부재로 되어 있는 것을 특징으로 하는 테니스 연습기구.The tennis exercise apparatus according to claim 1, wherein the connecting string is formed of an elastic member partially or entirely so as to be elastically stretched.
  3. 제1항에 있어서, 상기 연결끈은 길이 조정이 가능하게 되어 있는 것을 특징으로 하는 테니스 연습기구.The method of claim 1, wherein the connecting string is a tennis exercise device, characterized in that the length can be adjusted.
  4. 제1항에 있어서, 상기 손잡이는 원통형상으로 되어 있으며; The handle according to claim 1, wherein the handle has a cylindrical shape;
    나아가 상기 연결끈을 축중심으로 하여 회전 가능하게 설치되는 것을 특징으로 하는 테니스 연습기구.Furthermore, a tennis exercise apparatus characterized in that the connection string is rotatably installed around an axis.
  5. 제1항에 있어서, According to claim 1,
    상기 테니스공의 표면에 돔형태의 커버캡(23)이 접착으로 고정되어 있으며;A dome-shaped cover cap 23 is fixed to the surface of the tennis ball by adhesion;
    상기 연결끈의 연장부 끝은 원판(22) 형태로 확장되어 있으며, 상기 커버캡(23)에 의해 덮여있고;The end of the extension portion of the connecting string is extended in the form of a disk 22 and is covered by the cover cap 23;
    접착부재(24)가 상기 커버캡(23)과 연결끈의 경계부위가 설치되어 있는 것을 특징으로 하는 테니스 연습기구.Tennis member, characterized in that the adhesive member 24 is provided with a boundary portion of the cover cap 23 and the connection string.
PCT/KR2019/017260 2018-12-10 2019-12-09 Tennis practice device WO2020122515A1 (en)

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