KR200470337Y1 - Tennis Serve Trainning Device for Beginner - Google Patents

Tennis Serve Trainning Device for Beginner Download PDF

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Publication number
KR200470337Y1
KR200470337Y1 KR2020130008358U KR20130008358U KR200470337Y1 KR 200470337 Y1 KR200470337 Y1 KR 200470337Y1 KR 2020130008358 U KR2020130008358 U KR 2020130008358U KR 20130008358 U KR20130008358 U KR 20130008358U KR 200470337 Y1 KR200470337 Y1 KR 200470337Y1
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South Korea
Prior art keywords
ball
tennis
unit
sub
dropping
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KR2020130008358U
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Korean (ko)
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구한주
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구한주
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Priority to KR2020130008358U priority Critical patent/KR200470337Y1/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
    • A63B69/00—Training appliances or apparatus for special sports
    • A63B69/38—Training appliances or apparatus for special sports for tennis
    • A63B69/385—Training appliances or apparatus for special sports for tennis for practising the serve
    • 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

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Rehabilitation Tools (AREA)

Abstract

The tennis sub exerciser for beginners of the present invention serves to allow the tennis ball to fall freely at a higher position than when the racket is lifted, and to serve the tennis. A ball storage unit which stores a ball and serves as a passage for lowering the stored tennis ball to a lower side during a sub-practice; A ball lifter unit for holding the tennis ball to the ball storage unit; A ball dropping unit installed at a lower end of the ball storage unit and dropping the tennis ball one by one whenever there is a signal; A support part to which the ball storage device part, the ball elevating device part and the ball dropping device part are fixed and installed; And a foot switch operating by the foot and sending an operation signal to the ball dropping unit, and comprising a control unit for driving and controlling the ball elevating unit and the ball dropping unit.
According to the tennis sub exerciser for beginners of the present invention, it is possible to adjust the time when the tennis ball falls after pressing the foot switch, so that you can take the time to switch to the sub-practice posture, and to practice the sub hitting by hitting the free-falling tennis ball. And, if you put the ball into the ball inlet in the lower portion is convenient to raise the tennis ball to the ball storage unit to the ball lift unit.

Description

Tennis Serve Training Device for Beginner

The present invention relates to a tennis sub exerciser for beginners for hitting the hitting the tennis ball falling to the bottom without throwing the tennis ball directly to the upper by itself, more specifically, to store the tennis ball necessary for the sub-execution, A ball storage unit serving as a passage to lower the tennis ball to the lower part during the practice; A ball lifter unit for holding the tennis ball to the ball storage unit; A ball dropping unit installed at a lower end of the ball storage unit and dropping the tennis ball one by one whenever there is a signal; A support part to which the ball storage device part, the ball elevating device part and the ball dropping device part are fixed and installed; It relates to a tennis sub exerciser for beginners comprising a foot switch which is operated by the foot and sends an operation signal to the ball dropping unit, and comprising a control unit for driving and controlling the ball lifting unit and the ball dropping unit.

 When you first learn tennis, you learn forehand, backhand, and volley, but the most difficult thing for beginners is the sub.

To put the serve, throw your ball with your left hand, shake your whole body, stretch it out, hit the ball falling into the racket, and the ball goes forward.

At this time, various physical activities such as RBI of the ball and the rotation of the wrist of the racket surface at the moment of the ball are operated.

However, when a player throws a ball with his left hand, beginners forget everything and can not adjust the ball precisely.

Also, the ball does not fall in the desired direction and the posture is disturbed. This allows the practitioner to substitute for throwing the ball so that they can learn the exact striking posture.

The sub machine posted as Utility Model Room 1982-0001373 rotates a main body with a compressor loaded inside, a pressure chamber with a tennis ball inlet and a pressure supply port, and a supply cylinder with an insertion hole drilled into the upper surface of the main body. Place the inserted storage box and attach it to the angle control plate with the adjustment pin at the tip of the control panel connected to the fixed plate and the connection on the upper surface so that the right and left firing angles of the tennis ball can be arbitrarily rotated, and the ejection hole at the tip of the pressure chamber It is a device for putting a structure or a sub which is made by inserting a spout formed with a groove, not a device for practicing the sub.

Tennis practice machine published in Utility Model 195-0010322 is a pair of pitching rollers condensed so that a launching hole is formed on the front of the main body and can be thrown through the launching hole, forming guide balls on both sides of the main body and DC pitching. The support plate, which is pitched roller driven by the motor, is installed to be rotatably installed in the guide hole by fasteners. The main body is pivotally rotatable around the rotating shaft on the support plate on which the support roller is installed on the upper surface, and the driving rod is condensed on the rotating motor to connect the connecting rod and the connecting rod connected to the driving rod. Bolted

And insert the operation rod between the adjusting pieces, and fix the installation plate on the top of the input tray with the input plate formed with the input hole, and fasten the guide plate with many insertion holes to the motor shaft so as to be located on the top of the input plate, And the blockage plate is fixedly installed so that the blocking plate is located at the top of the input hole, and the foot switch is connected to the DC sorting motor and is not a structure or a sub exerciser.

Strike exerciser of the ball game is published as a registered utility model 20-0454299 spaced apart from each other, the support is provided with a pair of adjustable frame; And plywood, and any one of hard vinyl and a net, and one side and the other side of each of the upper portions of the pair of frames are rotatably coupled in an acute angle range back and forth when hit by the ball about the frame. It includes; The support portion is detachably coupled to the container for accommodating the ball hit the striking portion in the lower portion of the pair of frames, The holder is buffered by the impact when the ball falls It is not for the structure or sub-practice that the sponge is accommodated so as not to bounce out of the box, but for the stroke practice of a sport such as tennis, which is different from the present invention.

Multi-purpose sports swing training device published as Patent 10-2007-0051323 is a multi-purpose sports training device for improving and teaching hitting and throwing techniques, having a first end and a second end, the first end Adjustable waist belt with connecting means arranged on said first and second ends for connecting said second end with said resilient connector having a distal end and a proximal end, and a clamp upon wearing said waist belt At least one clamp attached to the waistbelt and operatively capturing and retaining the proximal end of the resilient connector to be positioned adjacent to an iliac crest of the user's leading hip, Attachment means disposed on the distal end of the resilient connector and number of sporting goods / hand connections for attaching to the attachment means It is not a device or sub exerciser characterized by including a stage.

The present invention for solving the above problems can be practiced to hit the sub by freely falling the tennis ball after a certain time elapses each time the foot switch is pressed, and the tennis ball to the ball storage device to the ball storage unit It's about providing a tennis serve exerciser for beginners.

The tennis sub exerciser for beginners of the present invention serves to allow the tennis ball to fall freely at a higher position than when the racket is lifted, and to serve the tennis. A ball storage unit which stores a ball and serves as a passage for lowering the stored tennis ball to a lower side during a sub-practice; A ball lifter unit for holding the tennis ball to the ball storage unit; A ball dropping unit installed at a lower end of the ball storage unit and dropping the tennis ball one by one whenever there is a signal; A support part to which the ball storage device part, the ball elevating device part and the ball dropping device part are fixed and installed; And a foot switch operating by the foot and sending an operation signal to the ball dropping unit, and comprising a control unit for driving and controlling the ball elevating unit and the ball dropping unit.

The ball drop device unit and a pusher for pushing the tennis ball; A cylinder portion having a piston coupled to the pusher and pushing and pulling the pusher; The hydraulic unit is composed of a hydraulic unit for sending hydraulic pressure to the hydraulic line.

The ball lift unit is a bucket elevator type to lift the tennis ball to the top to the ball storage unit, the bucket lifting device, a plurality of buckets to raise the tennis ball to the ball storage unit in the upper portion; A belt or chain on which the bucket is installed; A geared motor rotating the belt or the chain and including a reduction gear for reducing the rotational speed of the motor; Rotating drum or sprocket wheel is installed on the top and bottom of the belt or chain to transfer the rotational force of the geared motor to the belt or chain; The rotating drum or the sprocket wheel is installed and fixed inside, the bucket and the belt or chain is installed inside, the geared motor is composed of a casing is installed outside.

The casing and the bucket are made of plastic or FRP material to reduce the weight of the ball lift unit.

The ball storage unit and the ball storage unit for storing the tennis ball; The ball storage unit is coupled to the lower portion of the ball storage unit which is lowered from the ball storage unit to the lower portion so that the tennis ball from the ball dropping device unit to the outside, the lower portion of the ball storage unit is the tennis ball The ball storage port is discharged is formed, the ball storage portion is a structure in which the side wall is gathered to the storage ball discharge port and the tennis ball is collected to the bottom, the ball storage outlet is installed at the bottom of the ball storage unit and the tennis ball It is a size that can pass only one, the ball drop portion is composed of a drop chute that the tennis ball falls, the ball waiting portion which is coupled to the lower portion of the drop chute waiting for the tennis ball to fall to the outside and The ball waiting unit has a ball external discharge port through which the tennis ball is discharged to the outside, and a pusher of the ball dropping device unit. The pusher waiting portion is formed, and the lower portion of the outer ball outlet to the tennis ball is not pushed to the pusher, the lifting slope to prevent the ball from falling to the outside arbitrarily, when the pusher pushed the lifting slope After passing, a downhill slope is formed to be discharged to the outside by gravity, and a piston passage hole through which the piston passes is formed in the vertical wall of the ball standby portion.

In order to have a time for the user to switch to the sub-practice posture when operating the foot switch, the operation delay time of the ball dropping device should be set by the controller at 0.5 second intervals between 1 and 5 seconds.

The support portion includes a main support vertically formed; A lift unit bracket coupled to a lower portion of the main support to hold the ball lift unit; A storage bracket coupled to an upper portion of the main support and coupled to the ball storage; A dropping device part bracket coupled to an intermediate part of the main support and installed with the ball dropping device part; A casing support for supporting the casing of the ball elevating unit; Is coupled to the lower portion of the main support structure of the base to enable the tennis sub-practice self-reliance.

The above-described tennis sub exerciser of the present invention can solve the problem to be solved of the present invention.

According to the tennis sub exerciser of the present invention, it is possible to adjust the time when the tennis ball falls after pressing the foot switch, so that the time can be switched to the sub-practice posture, and the sub-ball practice can be performed by hitting the free-falling tennis ball. If you put the ball into the ball inlet in the lower portion of the ball lift device can raise the tennis ball to the ball storage unit is convenient.

1 is an overall view according to the tennis sub exerciser for beginners of the present invention
Figure 2 is a schematic view of the ball storage unit according to the tennis sub exerciser for beginners of the present invention
3 is a conceptual view of the tennis ball falls from the ball storage unit and the ball dropping unit according to the tennis sub exerciser for beginners of the present invention
Figure 4 is a schematic view of the ball dropping device according to the tennis sub exerciser for beginners of the present invention
Figure 5 is a schematic view of the ball lifting device according to the tennis sub exerciser for beginners of the present invention
Figure 6 is a schematic view of the support portion according to the tennis sub exerciser for beginners of the present invention

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Before describing the present invention in detail, a detailed description of known techniques or configurations related to the present invention will be omitted if it is determined that the gist of the present invention may be unnecessarily obscured.

In addition, the terms to be described below are terms defined in consideration of functions in the present invention, which may vary according to a user's or operator's intention or custom, and the definition thereof describes "a tennis sub exerciser for beginners" according to the present invention. It should be made based on the contents throughout the specification.

Hereinafter, a preferred embodiment of the "tennis tennis exerciser for beginners" according to the present invention will be described in detail with reference to the drawings. The following examples are merely illustrative of the present invention and are not intended to limit the scope of the present invention.

1 is an overall view according to the tennis sub exerciser for beginners of the present invention, Figure 2 is a schematic view of the ball storage unit according to the tennis sub exerciser for beginners of the present invention, Figure 3 is a tennis sub for beginners of the present invention A conceptual view showing a tennis ball falling from a ball storage device and a ball dropping device unit according to a practice device, FIG. 4 is a schematic view of a ball dropping device unit according to a tennis sub exerciser for a beginner of the present invention, and FIG. It is a schematic diagram of the ball lift device according to the tennis sub exerciser, Figure 6 is a schematic view of the support portion according to the tennis sub exerciser for beginners of the present invention.

As shown in FIG. 1, the tennis sub exerciser of the present invention allows the tennis ball to be freely dropped at a higher position than when the racket is lifted so that it can be used to practice the tennis ball. 6) and a ball storage unit (1) which stores a passage for lowering the tennis ball 6 stored in the lower part during the sub-practice; A ball elevating unit unit (2) for holding the tennis ball (6) up to the ball storage unit (1); A ball dropping device unit 3 installed at a lower end of the ball storage device 1 to drop the tennis balls 6 one by one whenever there is a signal; A support part 4 to which the ball storage device part 1, the ball elevating device part 2, and the ball dropping device part 3 are fixed and installed; A foot switch 51 which is operated by the foot and sends an operation signal to the ball dropping unit 3, and as a control unit 5 for driving and controlling the ball elevating unit 2 and the ball dropping unit 3; It is composed.

In order to have a time for the user to switch to the sub-practice posture when operating the foot switch 51, the operation delay time of the ball dropping device unit 3 is 0.5 to 5 seconds between 1 to 5 seconds. It is a structure having an adjustable height that can be adjusted in, it is preferable to install the knocker 112 on the side wall of the ball storage unit 1 in preparation for the ball does not come down well in the ball storage unit (1).

The control unit 5 has an on and off switch for starting and stopping the ball elevating unit 2 so as to operate the ball elevating unit 2 to bring the tennis ball 6 to the ball storage unit 1. Only run when raised.

The height of the ball outlet (1221) of the ball storage unit 1 should be 50 ~ 80cm higher than when the athlete lifts the tennis racket.

According to the tennis sub exerciser of the present invention, after pressing the foot switch 51, the tennis ball 6 can adjust the falling time, so that it can have a time to switch to the sub-practice posture, by hitting a free-falling tennis ball. The sub hitting practice, it is convenient to put the ball into the ball inlet 251 in the lower can raise the tennis ball to the ball storage unit (1) by the ball lifting unit (2).

As shown in FIG. 2, the ball storage unit 1 stores a ball for storing the tennis ball 6 with a capacity for storing at least 20 balls so that a plurality of exercises can be continued without interruption during sub exercises. A storage unit 11; Ball dropping portion which is coupled to the lower portion of the ball storage portion 11 is lowered from the ball storage portion 11 to the lower portion so that the tennis ball (6) fall from the ball dropping device portion 3 to the outside It consists of 12 pieces.

The ball storage unit 11 has a structure in which sidewalls are gathered to the storage ball outlet 111 to collect the tennis ball 6 downward.

The lower part of the ball storage unit 11 is formed with a storage ball outlet 111 for discharging the tennis ball 6, the side wall so that the tennis ball 6 is well discharged to the ball dropping portion 12 A knocker 112 may be installed that may impact.

The knocker 112 is preferably an electric knocker because the air knocker requires air.

The storage ball discharge port 111 is installed at the lower end of the ball storage unit 11 and is sized to pass through only one of the tennis balls 6 without resistance, so large that the taste ball 6 should not be tangled.

When the tennis ball 6 does not come down well to the ball dropping part 12, the knocker 112 is operated to knock it down, and the knocker 112 is knocked down. The knocker 112 is controlled by the controller 5. It is desirable to be able to control the operation at regular intervals, preferably both manual operation and automatic operation.

The ball dropping unit 12 is coupled to the drop chute 121 to drop the tennis ball 6, the drop chute 121 is to wait for the tennis ball 6 to fall to the outside It is comprised of the ball | bowl waiting part 122 which is a place.

The ball waiting unit 122 is a ball outside air outlet 1221 for discharging the tennis ball 6 to the outside and the pusher waiting unit 1222 which is a place where the pusher 31 of the ball dropping device unit 3 waits. ) Is formed.

In the lower portion of the outer ball outlet 1221, the inclined portion (12211) and the pusher (31) to prevent the ball from falling arbitrarily when the tennis ball 6 is not pushed to the pusher (31) When it is pushed, after passing through the raising slope portion 12211, a downward slope portion 12212 is formed to be discharged to the outside by gravity.

The piston passage hole 12221 through which the piston 321 passes is formed in the vertical wall of the ball waiting portion 122.

There is the raising slope 12211, and the tennis ball 6 waiting to come down to the ball waiting portion 122 is not discharged to the outside arbitrarily, the signal to the pusher 31 by the pusher 31 by a signal ( When 6) is pushed, only the upper portion of the inclined portion 12211 is pushed up, and the gravity is activated by the lowered portion 12212 to automatically fall to the lower portion.

As shown in FIG. 3, when the tennis ball 6 is waiting for the ball waiting unit 122 and an athlete steps on the foot switch 51, a signal is transmitted to the control unit 5 so that the control unit ( In 5), a signal for pushing the pusher 31 to the ball dropping device part 3 is transmitted, and the piston 321 of the cylinder part 32 moves forward by hydraulic pressure, so that the pusher 31 pushes with a predetermined force. When passing through the inclination portion 12211, the tennis ball 6 is discharged along the down inclination portion 12212 by gravity to fall freely.

In order to have a time for the user to switch to the sub-practice posture when operating the foot switch 51, the operation delay time of the ball dropping device unit 3 is 0.5 to 5 seconds between 1 to 5 seconds. You should be able to set it at.

When the tennis ball 6 does not come down well to the ball dropping part 12, the knocker 112 is operated to knock it down, and the knocker 112 is knocked down. The knocker 112 is controlled by the controller 5. It is desirable to be able to control the operation at regular intervals, preferably both manual operation and automatic operation.

As shown in FIG. 4, the ball dropping unit 3 is installed at the lower end of the ball storage unit 1 and serves to drop the tennis ball 6 downward one by one whenever there is a signal. A pusher 31 attached to the front end of the piston 321 to push the tennis ball 6; A cylinder portion 32 having a piston 321 coupled to the pusher 31 and pushing and pulling the pusher 31; It is composed of a hydraulic unit 33 for generating the hydraulic pressure to send the hydraulic pressure to the hydraulic line 34 to the cylinder portion (32).

The operation and control of the ball dropping device section 3 is carried out in the control section 5.

As shown in FIG. 5, the ball elevating unit 2 is the tennis ball 6 as the ball storage unit 1 capable of storing 20 or more balls so that a plurality of exercises can be continued without interruption during sub exercises. It is a bucket elevator type to serve to store and raise, the tennis ball (6) to the top to the bucket 21 to send to the ball storage unit (1).

The ball lifting unit (2) comprises a plurality of buckets (21) for raising the tennis ball (6) to the ball storage unit (1) at the top; A belt or chain 22 on which the bucket 21 is installed; A geared motor (23) including a reduction gear for rotating the belt or chain (22) and reducing the rotational speed of the motor; A rotating drum or sprocket wheel 24 installed at the top and bottom of the belt or chain 23 to transmit the rotational force of the motor 23 to the belt or chain 22; The rotating drum or sprocket wheel 24 is installed and fixed inside, the bucket 21 and the belt or chain 22 is installed therein, the motor 23 to the casing 25 is installed outside It is composed.

When the belt is rotated from the ball elevator unit 2 to the inside, that is, when the bucket 21 is installed, the rotating drum is used, and when the chain is rotated in the ball elevator unit 2, that is, the bucket ( If the chain is installed 21), the sprocket wheel is used.

The casing 25 is separated into three places to install the belt or chain 22 and the rotating drum or sprocket wheel 24 therein, and is assembled by an assembly flange 255.

The casing 25 has a ball inlet 251 into which the tennis ball 6 is inserted, a ball outlet 252 through which the tennis ball 6 is discharged, and a lifting unit bracket 42 of the support part 4. A bracket coupling portion 253 coupled to the support portion and a support coupling portion 254 coupled with the casing support 45 of the support portion 4 are formed.

Power transmission from the geared motor (3) to the rotating drum or the sprocket wheel (24) is carried out by a power transmission chain (232), the motor sprocket wheel for power transmission is inserted into the end of the rotation shaft of the geared motor (3). To transmit rotational force to the power transmission chain 232 and to transmit power from the power transmission chain 232 back to the rotating drum or sprocket wheel 24, and to the belt or to the rotating drum or sprocket wheel 24. Power is transmitted to the chain 22 to move the belt or chain 22, the bucket attached to the belt or chain 22 moves, and the tennis ball loaded in the bucket moves outward when the bucket is turned upside down. The ball is separated and stored in the ball storage unit 11 through the ball outlet 252.

The casing 25 and the bucket 21 are made of plastic or FRP material to reduce the weight of the ball lift unit 2.

As shown in FIG. 6, the support part 4 has the ball storage device 1, the ball elevating device part 2, and the ball dropping device part 3 fixed and installed thereon, and the main support 41 formed vertically. )Wow; Lifting unit bracket 42 is coupled to the lower portion of the main support 41, the ball lifting unit 2 is placed; A storage bracket 43 coupled to an upper portion of the main support 41 and coupled to the ball storage 11; A dropping device portion bracket 44 coupled to the middle portion of the main support 41 to which the ball dropping device portion 3 is installed; A casing support 45 for supporting the casing 25 of the ball elevating unit 2; The structure is composed of a base 46 is coupled to the lower portion of the main support 41 to enable the tennis sub exerciser to stand on its own.

According to the tennis sub exerciser of the present invention, after the foot switch 51 is pressed, the time when the tennis ball 6 falls can be adjusted through an adjustment height (omitted in the drawing) provided in the controller 5 to the sub-practice posture. Can have a time to switch, can hit the free-falling tennis ball to practice the sub-hit, and when the ball is inserted into the ball inlet 251 in the lower portion of the tennis ball to the ball lift unit 2 It can be raised to the storage unit (1) is convenient.

1: ball storage unit 11: ball storage unit
111: storage ball outlet 112: knocker
12: ball dropping part
121: drop suit 122: ball standby
1221: ball external outlet 12211: lifting slope
12212: descending slope 1222: pusher waiting
12221: Piston Passing Hole
2 ball lifting device 21 bucket
22: belt or chain 23: geared motor
231: motor sprocket wheel 232: power transmission chain
24: rotating drum or sprocket wheel 25: casing
251: ball inlet 252: ball outlet
253: bracket coupling portion 254: support coupling portion
255: assembly flange
3: ball dropping unit 31: pusher
32: cylinder part 321: piston
33: Hydraulic Unit 34 Hydraulic Line
4: support part 41: main support
42: lifting unit bracket 43: storage bracket
44: dropping device bracket 45: casing support
46: base 5: control unit
51: foot switch 52: control and power line
6: tennis ball

Claims (1)

In the tennis serve exerciser, which allows the tennis ball 6 to fall freely at a higher position than when the racket is lifted up so that the practice can be performed.
The tennis sub exerciser includes: a ball storage unit (1) for storing the tennis ball (6) necessary for sub practice and serving as a passage for lowering the stored tennis ball (6) to the lower part during sub practice;
A ball elevating unit unit (2) for holding the tennis ball (6) up to the ball storage unit (1);
A ball dropping device unit 3 installed at a lower end of the ball storage device 1 to drop the tennis balls 6 one by one whenever there is a signal;
A support part 4 to which the ball storage device part 1, the ball elevating device part 2, and the ball dropping device part 3 are fixed and installed;
A foot switch 51 which is operated by the foot and sends an operation signal to the ball dropping unit 3, and as a control unit 5 for driving and controlling the ball elevating unit 2 and the ball dropping unit 3; Is composed,
The ball dropping unit 3 includes a pusher 31 for pushing the tennis ball 6;
A cylinder portion 32 having a piston 321 coupled to the pusher 31 and pushing and pulling the pusher 31;
Is composed of a hydraulic unit 33 for sending hydraulic pressure to the hydraulic line 34 to the cylinder portion 32,
The ball lifting unit 2 is a bucket elevator type to lift the tennis ball 6 to the bucket 21 to the upper portion to send to the ball storage unit 1,
The ball lifting unit (2) comprises a plurality of buckets (21) for raising the tennis ball (6) to the ball storage unit (1) at the top;
A belt 22 on which the bucket 21 is installed;
A geared motor 23 including a reduction gear for rotating the belt 22 and reducing the rotational speed of the motor;
Rotating drum 24 is installed on the upper and lower portions of the belt 22 to transmit the rotational force of the geared motor 23 to the belt 22;
The rotating drum 24 is installed inside and fixed, the bucket 21 and the belt 22 is installed therein, the geared motor 23 is composed of a casing 25 is installed outside,
The casing 25 and the bucket 21 are made of plastic or FRP material to reduce the weight of the ball lifting unit 2,
The ball storage unit (1) includes a ball storage unit (11) for storing the tennis ball (6);
Ball dropping portion which is coupled to the lower portion of the ball storage portion 11 is lowered from the ball storage portion 11 to the lower portion so that the tennis ball (6) fall from the ball dropping device portion 3 to the outside Consisting of 12,
The ball storage unit 11 has a structure in which the side wall is gathered to the storage ball discharge port 111, the tennis ball 6 is gathered to the bottom,
The lower portion of the ball storage portion 11 is formed with a storage ball discharge port 111 through which the tennis ball 6 is discharged, and a knocker that can impact the side wall so as to be well discharged to the ball dropping portion 12 ( Knocker) is installed,
The storage ball discharge port 111 is installed at the lower end of the ball storage unit 11 is a size that can pass only one tennis ball (6),
The ball dropping unit 12 is coupled to the drop chute 121 to drop the tennis ball 6, the drop chute 121 is to wait for the tennis ball 6 to fall to the outside It is composed of a ball waiting portion 122,
The ball waiting unit 122 is a ball outside air outlet 1221 for discharging the tennis ball 6 to the outside and the pusher waiting unit 1222 which is a place where the pusher 31 of the ball dropping device unit 3 waits. ) Is formed,
In the lower portion of the outer ball outlet 1221, the inclined portion (12211) and the pusher (31) to prevent the ball from falling arbitrarily when the tennis ball 6 is not pushed to the pusher (31) When it is pushed down after passing through the lifting slope (12211) is formed a downward slope (12212) to be discharged to the outside by gravity,
A piston passage hole 12221 through which the piston 321 passes is formed in a vertical wall of the ball waiting portion 122.
In order to have a time for the user to switch to the sub-practice posture when operating the foot switch 51, the operation delay time of the ball dropping device unit 3 is 0.5 to 5 seconds between 1 to 5 seconds. It has a structure that can be adjusted at
The support portion 4 and the main support (41) formed vertically;
Lifting unit bracket 42 is coupled to the lower portion of the main support 41, the ball lifting unit 2 is placed;
A storage bracket 43 coupled to an upper portion of the main support 41 and coupled to the ball storage 11;
A dropping device portion bracket 44 coupled to the middle portion of the main support 41 to which the ball dropping device portion 3 is installed;
A casing support 45 for supporting the casing 25 of the ball elevating unit 2;
Tennis sub exerciser for beginners is composed of a base 46 is coupled to the lower portion of the main support 41 to enable the tennis sub exerciser to stand on its own
KR2020130008358U 2013-10-11 2013-10-11 Tennis Serve Trainning Device for Beginner KR200470337Y1 (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109045656A (en) * 2018-10-17 2018-12-21 张家林 A kind of tennis service device
KR20190049167A (en) * 2017-11-01 2019-05-09 주식회사 리얼야구존 A ball transfer device capable of discharging a ball dropped in the main body
KR20190058093A (en) * 2017-11-21 2019-05-29 주식회사 리얼야구존 A ball transporting apparatus including a plurality of sensor units and method of controlling the same
KR20220055046A (en) 2020-10-26 2022-05-03 삼육대학교산학협력단 Serve practice apparatus in tennis
KR102639793B1 (en) * 2023-10-24 2024-02-22 주식회사 라이프스포츠 automatic tennis ball launcher

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR820001373Y1 (en) * 1980-07-08 1982-07-03 임석규 A machine for serving tennis ball
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KR820001373Y1 (en) * 1980-07-08 1982-07-03 임석규 A machine for serving tennis ball
KR830002586Y1 (en) * 1981-12-31 1983-12-07 민부기 Throwing equipment
JPS61232877A (en) * 1985-04-03 1986-10-17 ゲイリー・ギヤツチエル Automatic ball serve apparatus

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Publication number Priority date Publication date Assignee Title
KR20190049167A (en) * 2017-11-01 2019-05-09 주식회사 리얼야구존 A ball transfer device capable of discharging a ball dropped in the main body
KR102016695B1 (en) * 2017-11-01 2019-09-02 주식회사 리얼야구존 A ball transfer device capable of discharging a ball dropped in the main body
KR20190058093A (en) * 2017-11-21 2019-05-29 주식회사 리얼야구존 A ball transporting apparatus including a plurality of sensor units and method of controlling the same
KR102025395B1 (en) * 2017-11-21 2019-11-04 주식회사 리얼야구존 A ball transporting apparatus including a plurality of sensor units and method of controlling the same
CN109045656A (en) * 2018-10-17 2018-12-21 张家林 A kind of tennis service device
KR20220055046A (en) 2020-10-26 2022-05-03 삼육대학교산학협력단 Serve practice apparatus in tennis
KR102639793B1 (en) * 2023-10-24 2024-02-22 주식회사 라이프스포츠 automatic tennis ball launcher

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