CN208145402U - A kind of tennis serve machine - Google Patents
A kind of tennis serve machine Download PDFInfo
- Publication number
- CN208145402U CN208145402U CN201820448823.4U CN201820448823U CN208145402U CN 208145402 U CN208145402 U CN 208145402U CN 201820448823 U CN201820448823 U CN 201820448823U CN 208145402 U CN208145402 U CN 208145402U
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- pedestal
- ball
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- clip
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Abstract
The utility model provides a kind of tennis serve machine, belongs to sports apparatus technical field.It solves the technical problems such as tennis course of action that existing tennis serve machine issues is less.This tennis serve machine includes pedestal and two clip wheels equipped with universal wheel, the front end of pedestal is equipped with tee mat, mounting base in the form of annular discs is equipped on tee mat vertically, mounting base can rotate with its center line as the axis, two clip wheels are rotatably connected in mounting base, service channel is formed between two clip wheels, ball-storing box is additionally provided on the rear portion of pedestal, the transfer device before and after capable of driving ball-storing box and moved up and down is equipped between ball-storing box and pedestal, ball-storing box is connected to a release pipe, and the ball mouth of release pipe can be aligned with service channel.The utility model has the advantages that the course of action that service robot can be made to issue more kinds of different paths.
Description
Technical field
The utility model belongs to sports apparatus technical field, is related to a kind of tennis serve machine.
Background technique
Tennis is the sports an of grace and fierceness, referred to as second-biggest-in-the-world ball game.Tennis is usually two
It is carried out between a singles sportsman or two pairs of combinations.Sportsman strikes tennis across net tennis racket on tennis court.With tennis
In the development of China, more and more people start to carry out tennis, and the skill of tennis needs a large amount of practice, instructs for tennis
Experienced service robot is trained important equipment.
Mostly costly, operation is also complex for the service machine equipment of current tennis training, is not suitable for the big of universities and colleges
Scale, significantly teaching uses, while the service of existing tennis serve machine is in the form of a single, can not provide the course of action of multiplicity, long
Time is unable to reach preferable training effect after.
Summary of the invention
The purpose of this utility model is the presence of the above problem in view of the prior art, proposes a kind of tennis serve machine, this
The technical issues of utility model solves is the course of action that service robot can be made to issue more kinds of different paths.
The purpose of this utility model can be realized by the following technical scheme：
The front end of a kind of tennis serve machine, pedestal and two clip wheels including being equipped with universal wheel, the pedestal is equipped with service
Seat, which is characterized in that be equipped with mounting base in the form of annular discs on the tee mat vertically, the mounting base can be using its center line as axis
Line rotation, two clip wheels are rotatably connected in mounting base, formation service channel between two clip wheels, after the pedestal
Ball-storing box is additionally provided in portion, the transfer dress for being equipped with before and after capable of driving ball-storing box and moving up and down between the ball-storing box and pedestal
It sets, the ball-storing box is connected to a release pipe, and the ball mouth of the release pipe can be aligned with service channel.
Mounting base can rotate on tee mat, therefore two be rotatably connected in mounting base clip wheel can turn with mounting base
It is dynamic, the direction in service channel is adjustable by the rotation of mounting base, while the channel that can when rotating 180 ° to serve a ball above and below
Position is flipped, and can change selling a little for ball, therefore can issue the course of action in more kinds of different paths, therefore serve a ball using this kind
Function reaches better practice effect；Ball-storing box adapts to the change of service channel position by mobile device, guarantees release pipe
Ball mouth can with service channel be aligned.
In above-mentioned tennis serve machine, the mounting base includes two pieces and is arranged in parallel and at interval mounting disc, two pieces of institutes
It states and is fixedly connected between mounting disc by several connecting rods, the outer side center of two pieces of mounting discs all has pivoted housing, axle sleeve
It is rotatably connected on tee mat, two clip wheels are rotatablely connected between two mounting discs.Two clip wheels are connected by shaft
Between two mounting discs, it ensure that two clip wheel rotational stabilities, to guarantee that the tennis course of action sent out is stablized.
In above-mentioned tennis serve machine, ring gear, the company of rotation on the tee mat are cased in one of them described mounting disc
It is connected to gear one, the gear one and ring gear engagement, the motor one of the rotation of energy band moving gear one is fixed on the tee mat.It is logical
Above structure is crossed to be able to achieve the rotation of mounting base and position after mounting base being rotate in place.
In above-mentioned tennis serve machine, one of clip wheel is rotatably connected on the center of mounting disc, another described folder
Opposite mounting disc eccentric setting is taken turns, the shaft of centrally located clip wheel passes through the axle sleeve of two mounting discs and passes through bearing relative axle
Set is rotatablely connected, and motor two is fixed in the mounting disc, the motor shaft and centrally located clip wheel of the motor two are wherein
It is connected between a piece shaft by belt, the shaft of the clip wheel of eccentric setting is in two mounting discs, the mounting disc
It is fixed with motor three, passes through belt between a wherein shaft for the clip wheel of the motor shaft and eccentric setting of the motor three
Connection.The revolving speed for controlling two clip wheels respectively by motor two and motor three is able to achieve the control of the revolving speed and angle that issue tennis
System, motor two and motor three can positive and negative rotations.
In above-mentioned tennis serve machine, the front end of the pedestal is provided with turning groove, and the tee mat includes in disk
The turntable of shape and two fixed links being fixed on turntable vertically, the mounting base are rotatably connected between two fixed links, institute
It states turntable to be located in turning groove, the raised column spinner in the lower end of the turntable, be provided on the pedestal and turning groove
The rotating hole of connection, the column spinner pass through rotating hole, and the lower end surface of the turntable is fixedly arranged at the front end with sector close to pedestal
It takes turns, gear two is also rotatably connected in the turning groove, the gear two and sector gear engage, solid in the turning groove
Surely there is motor four, connected between the motor four and gear two by belt.By motor four with moving gear two come back rotation, from
And drive tee mat come back rotation, final realization service channel swing in the horizontal direction, to adjust hair by sector gear
The drop point of tennis different location is realized in the direction of ball.
In above-mentioned tennis serve machine, the transfer device includes translator slider, elevator and push sliding block, the bottom
Front-rear direction on seat along pedestal is provided with two guide rails, and the translator slider is slidably connected on two guide rails, the lifting
Block is located at the surface of translator slider, and the ball-storing box is fixed on elevator, is vertically fixed in the translator slider several
Root guide rod, be fixed on the elevator with the one-to-one guide sleeve of guide rod, the guide rod passes through guide sleeve, described
Lifting groove is offered in the middle part of the lower end of elevator, the lifting groove has inclined lifting inclined-plane one, and the push sliding block is located at
In translator slider and it is located in lifting groove, the push sliding block has the lifting inclined-plane two that can be bonded with lifting inclined-plane one, in institute
Stating elevator when push sliding block is slided along the front-rear direction of pedestal can slide up and down along lifting inclined-plane two.Translator slider
Can be moved forward and backward, elevator can move up and down, be able to achieve to above and below release pipe and the adjusting of front-rear position, can make release pipe with
The alignment of service channel；Elevator is pushed to move up and down by bevel structure, structure is simple and durable, and cost is relatively low.
In above-mentioned tennis serve machine, the upper side of the translator slider offers sliding slot along the front-rear direction of pedestal
One, the sliding slot one is oppositely arranged with lifting groove, and the lower end of the push sliding block has the link block one for protruding into sliding slot one, described
Screw rod one is rotatably connected in sliding slot one, one end of the screw rod one is pierced by sliding slot and screw rod one is pierced by one end of sliding slot and is fixed with
Handle, the middle part of the screw rod one pass through link block and are threadedly coupled together with link block one.It can be driven by rotary screw rod two flat
It moves sliding block to slide along the front-rear direction of pedestal, to realize that translator slider pushes elevator to move up and down and position, thus real
Now to release pipe vertical position adjusting.
In above-mentioned tennis serve machine, the middle part of the translator slider is downwardly convex a link block two, on the pedestal
Screw rod two is rotatably connected between two guide rails, one end of the screw rod two is fixed with handle, the middle part of the screw rod two
It is threadedly coupled across link block two and with link block two.Translator slider can be driven along guide rail by rotary screw rod two to move back
It is dynamic, to realize the adjusting to release pipe in horizontal position.
Compared with prior art, this tennis serve machine has the course of action that service robot can be made to issue more kinds of different paths
Advantage.
Detailed description of the invention
Fig. 1 is schematic cross-sectional view when service channel is located below in this tennis serve machine.
Fig. 2 is schematic cross-sectional view when service channel is located above in this tennis serve machine.
Fig. 3 is the side structure schematic view of clip wheel.
Fig. 4 is the enlarged structure schematic diagram in the portion A in Fig. 1.
In figure, 1, pedestal；11, universal wheel；12, turning groove；13, gear two；14, motor four；2, tee mat；21, tooth
Wheel one；22, turntable；221, column spinner；222, sector gear；223, it is oriented to groove；23, fixed link；24, positioning sleeve；241, bullet
Spring；242, steel ball；243, gap；244, steel ball seat；245, rolling groove；246, positioning groove；25, thrust ball bearing；3, pacify
Fill seat；31, mounting disc；311, connecting rod；32, ring gear；33, clip wheel；331, service channel；332, clip slot；333, salient point；34,
Motor two；35, motor three；4, ball-storing box；41, release pipe；5, translator slider；501, guide rod；502, guide rail；503, sliding slot
One；504, link block two；505, screw rod two；51, elevator；511, lifting groove；512, inclined-plane one is gone up and down；513, guide sleeve；
514, release channel；52, sliding block is pushed；521, inclined-plane two is gone up and down；522, link block one；523, screw rod one.
Specific embodiment
It is specific embodiment of the utility model and in conjunction with attached drawing below, the technical solution of the utility model is made further
Description, but the utility model is not limited to these examples.
As shown in Figures 1 to 4, tennis serve machine includes the pedestal 1 and two clip wheels 33 that universal wheel 11 is housed, pedestal 1
Front end is equipped with tee mat 2, is equipped with mounting base 3 in the form of annular discs vertically on tee mat 2, mounting base 3 can be with its center line as the axis
Rotation, two clip wheels 33 are rotatably connected in mounting base 3, formation service channel 331 between two clip wheels 33, after pedestal 1
It is additionally provided with ball-storing box 4 in portion, the transfer that can be driven 4 front and back of ball-storing box and move up and down is equipped between ball-storing box 4 and pedestal 1
Device, ball-storing box 4 are connected to a release pipe 41, and the ball mouth of release pipe 41 can be aligned with service channel 331.
Mounting base 3 includes two pieces and is arranged in parallel and at interval mounting disc 31, passes through several companies between two pieces of mounting discs 31
Extension bar 311 is fixedly connected, and the outer side center of two pieces of mounting discs 31 all has pivoted housing, and axle sleeve is rotatably connected on tee mat 2, and two
Clip wheel 33 is rotatablely connected between two mounting discs 31.Two clip wheels 33 are connected between two mounting discs 31 by shaft, are protected
Two 33 rotational stabilities of clip wheel are demonstrate,proved, to guarantee that the tennis course of action sent out is stablized.It is cased in one of mounting disc 31
Ring gear 32 is rotatably connected to gear 1 on tee mat 2, and gear 1 and ring gear 32 engage, and is fixed with energy band on tee mat 2
The motor one that moving gear 1 rotates.The rotation of mounting base 3 is able to achieve by above structure and mounting base 3 can be made to rotate in place
After position.One of clip wheel 33 is rotatably connected on the center of mounting disc 31, another clip wheel 33 is set with respect to 31 bias of mounting disc
It sets, the shaft of centrally located clip wheel 33 passes through the axle sleeve of two mounting discs 31 and is rotatablely connected by bearing with respect to axle sleeve, peace
It is fixed with motor 2 34 in sabot 31, leads between the motor shaft of motor 2 34 and a wherein shaft for centrally located clip wheel 33
Belt connection is crossed, the shaft of the clip wheel 33 of eccentric setting passes through two mounting discs 31, is fixed with motor 3 35 in mounting disc 31,
It is connected between a wherein shaft for the clip wheel 33 of the motor shaft and eccentric setting of motor 3 35 by belt.Pass through motor two
34 and motor 3 35 control the revolving speeds of two clip wheels 33 respectively, be able to achieve the control of the revolving speed and angle that issue tennis, motor two
34 and motor 3 35 can positive and negative rotation；When mounting base 3 rotates and adjusts service 331 upper and lower position of channel, since tee mat 2 stops,
It is installed again after needing to remove belt.The middle part of clip wheel 33 has the clip slot 332 of indent, and the cell wall of clip slot 332 is inclined-plane, clip slot
Several salient points 333 are all had on 332 two sides cell wall, several salient points 333 on the cell wall of the same side clip slot 332 are circumferentially
Array distribution, 333 relative misalignment of salient point on the two sides cell wall of clip slot 332.By salient point 333 can guarantee clip wheel 33 and tennis it
Between contact, so as to the drop point of more stable control tennis.
The front end of pedestal 1 is provided with turning groove 12, and tee mat 2 includes turntable 22 in the form of annular discs and is fixed on turntable vertically
Two fixed links 23 on 22, mounting base 3 are rotatably connected between two fixed links 23, and turntable 22 is located in turning groove 12,
The raised column spinner 221 in the lower end of turntable 22 is provided with the rotating hole being connected to turning groove 12, column spinner on pedestal 1
221 pass through rotating hole, and the lower end surface of turntable 22 is fixedly arranged at the front end with sector gear 222 close to pedestal 1, goes back in turning groove 12
It is rotatably connected to gear 2 13, gear 2 13 and sector gear 222 engage, and are fixed with motor 4 14, motor in turning groove 12
It is connected between 4 14 and gear 2 13 by belt.By 4 14 band moving gear 2 13 of motor come back rotation, to pass through sector
Gear 222 drives tee mat 2 to carry out back rotation, final to realize the service swing in the horizontal direction of channel 331, to adjust service
Direction, realize tennis different location drop point.It is recessed that the lower end surface of turntable 22 close to the rear end of pedestal 1 is provided with arc-shaped guiding
Slot 223, turning groove 12 is interior to be equipped with several groups Buffer Unit, and Buffer Unit is arc-shaped to be distributed and be respectively positioned on guiding groove 223
Underface, Buffer Unit include positioning sleeve 24, spring 241 and steel ball 242, and positioning sleeve 24 is fixed on vertically on pedestal 1, spring
241 are located in positioning sleeve 24, and the upper end of spring 241 is pierced by positioning sleeve 24, and the upper end of spring 241 is cased with steel ball seat 244, steel ball seat
There is gap 243, steel ball 242 is rotatably connected in steel ball seat 244 and the upper end of steel ball 242 is embedding between 244 and positioning sleeve 24
Enter to be oriented in groove 223.Recoil can be generated in service, the kick generated when serving a ball can be eliminated, be protected by spring 241
Demonstrate,prove the stabilization of tee mat 2；It can guarantee that turntable 22 keeps smooth when carrying out back rotation by steel ball 242.The upper end of steel ball seat 244
With the rolling groove 245 being arc-shaped, the lower end of steel ball 242 is embedded in rolling groove 245, and the lower end of steel ball seat 244 has
The upper end of positioning groove 246, spring 241 is embedded in positioning groove 246.Pass through thrust ball bearing 25 between column spinner 221 and pedestal 1
Connection.Stabilization and smooth, guarantee tennis drop point when can guarantee that tee mat 2 rotates by column spinner 221 and thrust ball bearing 25
It is accurate.
Transfer device includes translator slider 5, elevator 51 and push sliding block 52, along the front-rear direction of pedestal 1 on pedestal 1
Two guide rails 502 are provided with, translator slider 5 is slidably connected on two guide rails 502, and elevator 51 is being located at translator slider 5 just
Top, ball-storing box 4 are fixed on elevator 51, are vertically fixed several guide rods 501 in translator slider 5, on elevator 51
Be fixed with the one-to-one guide sleeve 513 of guide rod 501, guide rod 501 passes through guide sleeve 513, in the lower end of elevator 51
Portion offers lifting groove 511, and lifting groove 511 has inclined lifting inclined-plane 1, and push sliding block 52 is located in translator slider 5
And be located in lifting groove 511, push sliding block 52 has the lifting inclined-plane 2 521 that can be bonded with lifting inclined-plane 1, goes up and down inclined-plane
2 521 tilt angle be 45 °~50 °, preferably, in the present embodiment go up and down inclined-plane 2 521 tilt angle be 45 ° or
47 ° or 50 ° of person, when pushing sliding block 52 and sliding along the front-rear direction of pedestal 1, elevator 51 can be along lifting inclined-plane 2 521
It slides up and down.Translator slider 5 can be moved forward and backward, and elevator 51 can move up and down, and be able to achieve to about 41 release pipe and anteroposterior position
The adjusting set can make release pipe 41 be aligned with service channel 331；Elevator 51 is pushed to move up and down by bevel structure,
Structure is simple and durable, and cost is relatively low.
The upper side of translator slider 5 offers sliding slot 1, sliding slot 1 and lifting groove along the front-rear direction of pedestal 1
511 are oppositely arranged, and the lower end of push sliding block 52 has the link block 1 for protruding into sliding slot 1, and rotation connects in sliding slot 1
It is connected to screw rod 1, one end of screw rod 1 is pierced by sliding slot and screw rod 1 is pierced by one end of sliding slot and is fixed with handle, screw rod
One 523 middle part passes through link block 1 and is threadedly coupled with link block 1.Translation can be driven by rotary screw rod 2 505
Sliding block 5 is slided along the front-rear direction of pedestal 1, thus realize that translator slider 5 pushes elevator 51 to move up and down and position, thus
Realize to release pipe 41 vertical position adjusting.The middle part of translator slider 5 is downwardly convex link block 2 504, and pedestal 1 is upper
It is rotatably connected to screw rod 2 505 between two guide rails 502, one end of screw rod 2 505 is fixed with handle, in screw rod 2 505
Portion passes through link block 2 504 and is threadedly coupled with link block 2 504.By rotary screw rod 2 505 can drive translator slider 5 along
Guide rail 502 moves back and forth, to realize the adjusting to release pipe 41 in horizontal position.Release channel is offered on elevator 51
514, release channel 514 has the vertical section opened up vertically and the tilting section opened up diagonally downward, and vertical section goes out with ball-storing box 4
The connection of ball mouth, the lower port of tilting section are connected to release pipe 41.
Mounting base 3 can rotate on tee mat 2, therefore two be rotatably connected in mounting base 3 clip wheel 33 can be with peace
It fills seat 3 to rotate, the direction in service channel 331 is adjustable by the rotation of mounting base 3, while can to serve a ball when rotating 180 °
The upper and lower position in channel 331 is flipped, and can change selling a little for ball, therefore can issue the course of action in more kinds of different paths, because
This reaches better practice effect using this kind service function；Ball-storing box 4 adapts to service 331 position of channel by mobile device
Change, guarantee release pipe 41 ball mouth can with service channel 331 be aligned.
The specific embodiments described herein are merely examples of the spirit of the present invention.The utility model institute
Belonging to those skilled in the art can make various modifications or additions to the described embodiments or using similar
Mode substitute, but without departing from the spirit of the present application or beyond the scope of the appended claims.
Claims (8)
1. the front end of a kind of tennis serve machine, pedestal and two clip wheels including being equipped with universal wheel, the pedestal is equipped with tee mat,
It is characterized in that, being equipped with mounting base in the form of annular discs on the tee mat vertically, the mounting base can be with its center line as the axis
Rotation, two clip wheels are rotatably connected in mounting base, and service channel, the rear portion of the pedestal are formed between two clip wheels
On be additionally provided with ball-storing box, the transfer dress before and after ball-storing box and moved up and down can be driven by being equipped between the ball-storing box and pedestal
It sets, the ball-storing box is connected to a release pipe, and the ball mouth of the release pipe can be aligned with service channel.
2. tennis serve machine according to claim 1, which is characterized in that the mounting base includes that two pieces parallel and interval is set
The mounting disc set is fixedly connected between two pieces of mounting discs, in the outside of two pieces of mounting discs by several connecting rods
The heart all has pivoted housing, and axle sleeve is rotatably connected on tee mat, and two clip wheels are rotatablely connected between two mounting discs.
3. tennis serve machine according to claim 2, which is characterized in that it is cased with ring gear in one of them described mounting disc,
It is rotatably connected to gear one, the gear one and ring gear engagement on the tee mat, is fixed with energy band movable tooth on the tee mat
The motor one of one rotation of wheel.
4. tennis serve machine according to claim 2, which is characterized in that one of clip wheel is rotatably connected on mounting disc
Center, for another described clip wheel with respect to mounting disc eccentric setting, the shaft of centrally located clip wheel passes through the axis of two mounting discs
It covers and passes through bearing and be rotatablely connected with respect to axle sleeve, be fixed with motor two, the motor shaft of the motor two and position in the mounting disc
It is connected between a wherein shaft for the clip wheel at center by belt, the shaft of the clip wheel of eccentric setting passes through two peaces
Sabot, is fixed with motor three in the mounting disc, and wherein the one of the clip wheel of the motor shaft and eccentric setting of the motor three
It is connected between root shaft by belt.
5. tennis serve machine according to claim 1, which is characterized in that the front end of the pedestal is provided with turning groove, institute
Stating tee mat includes turntable in the form of annular discs and two fixed links being fixed on turntable vertically, and the mounting base is rotatably connected on
Between two fixed links, the turntable is located in turning groove, the raised column spinner in the lower end of the turntable, the pedestal
On be provided with the rotating hole being connected to turning groove, the column spinner passes through rotating hole, and the lower end surface of the turntable is close to pedestal
It is fixedly arranged at the front end with sector gear, gear two, the gear two and sector gear engagement are also rotatably connected in the turning groove,
It is fixed with motor four in the turning groove, is connected between the motor four and gear two by belt.
6. tennis serve machine according to claim 1, which is characterized in that the transfer device includes translator slider, lifting
Block and push sliding block, the front-rear direction on the pedestal along pedestal are provided with two guide rails, and the translator slider is slidably connected at
On two guide rails, the elevator is located at the surface of translator slider, and the ball-storing box is fixed on elevator, and the translation is slided
Several guide rods are vertically fixed on block, be fixed on the elevator with the one-to-one guide sleeve of guide rod, it is described to lead
Guide sleeve is passed through to bar, lifting groove is offered in the middle part of the lower end of the elevator, the lifting groove has inclined lifting inclined-plane
One, the push sliding block is located in translator slider and is located in lifting groove, and the push sliding block has and can paste with lifting inclined-plane one
The lifting inclined-plane two of conjunction, when the push sliding block is slided along the front-rear direction of pedestal, the elevator can be along lifting inclined-plane
Two slide up and down.
7. tennis serve machine according to claim 6, which is characterized in that the upper side of the translator slider is before pedestal
Rear direction offers sliding slot one, and the sliding slot one is oppositely arranged with lifting groove, and the lower end of the push sliding block, which has, protrudes into sliding slot
One link block one is rotatably connected to screw rod one in the sliding slot one, and one end of the screw rod one is pierced by sliding slot and screw rod one is worn
One end of sliding slot is fixed with handle out, and the middle part of the screw rod one passes through link block and is threadedly coupled together with link block one.
8. tennis serve machine according to claim 6, which is characterized in that the middle part of the translator slider is downwardly convex company
Block two is connect, is rotatably connected to screw rod two between two guide rails on the pedestal, one end of the screw rod two is fixed with handle,
The middle part of the screw rod two passes through link block two and is threadedly coupled with link block two.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820448823.4U CN208145402U (en) | 2018-03-31 | 2018-03-31 | A kind of tennis serve machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820448823.4U CN208145402U (en) | 2018-03-31 | 2018-03-31 | A kind of tennis serve machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208145402U true CN208145402U (en) | 2018-11-27 |
Family
ID=64380037
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820448823.4U Expired - Fee Related CN208145402U (en) | 2018-03-31 | 2018-03-31 | A kind of tennis serve machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208145402U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108392806A (en) * | 2018-03-31 | 2018-08-14 | 平湖市酷风文体用品有限公司 | A kind of tennis serve machine |
-
2018
- 2018-03-31 CN CN201820448823.4U patent/CN208145402U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108392806A (en) * | 2018-03-31 | 2018-08-14 | 平湖市酷风文体用品有限公司 | A kind of tennis serve machine |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181127 Termination date: 20190331 |