CN109200560B - Table tennis positioning mechanism on table tennis service robot - Google Patents
Table tennis positioning mechanism on table tennis service robot Download PDFInfo
- Publication number
- CN109200560B CN109200560B CN201811422319.8A CN201811422319A CN109200560B CN 109200560 B CN109200560 B CN 109200560B CN 201811422319 A CN201811422319 A CN 201811422319A CN 109200560 B CN109200560 B CN 109200560B
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- table tennis
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- ball
- sliding sleeve
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- 230000007246 mechanism Effects 0.000 title claims abstract description 15
- 238000001179 sorption measurement Methods 0.000 claims abstract description 22
- 230000005540 biological transmission Effects 0.000 claims 1
- 239000000428 dust Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 238000004891 communication Methods 0.000 description 4
- 238000004088 simulation Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000010304 firing Methods 0.000 description 3
- 230000009191 jumping Effects 0.000 description 3
- 238000009423 ventilation Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 230000003313 weakening effect Effects 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000010985 leather Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- 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
- A63B69/40—Stationarily-arranged devices for projecting balls or other bodies
- A63B69/409—Stationarily-arranged devices for projecting balls or other bodies with pneumatic ball- or body-propelling means
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B67/00—Sporting games or accessories therefor, not provided for in groups A63B1/00 - A63B65/00
- A63B67/04—Table games physically beneficial for the human body, modelled on outdoor sports, e.g. table tennis
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W90/00—Enabling technologies or technologies with a potential or indirect contribution to greenhouse gas [GHG] emissions mitigation
- Y02W90/10—Bio-packaging, e.g. packing containers made from renewable resources or bio-plastics
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- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Physical Education & Sports Medicine (AREA)
- Hooks, Suction Cups, And Attachment By Adhesive Means (AREA)
Abstract
The invention provides a table tennis positioning mechanism on a table tennis service robot, and belongs to the technical field of entertainment equipment. The table tennis ball serving machine comprises a machine body, a stand column and a ball storage box, wherein the machine body is connected to the upper end of the stand column, the ball storage box is arranged above the machine body, a transmitting cylinder is fixedly arranged on the machine body, a transmitting hole is formed in the transmitting cylinder, a positioning mechanism comprises a vacuum pump, the vacuum pump is connected with a low-pressure air suction pipe, an exhaust cavity is communicated with the low-pressure air suction pipe through an overflow pipe, a plurality of adsorption holes are formed in the inner cylinder, each adsorption hole is communicated with the exhaust cavity, and the adsorption holes can adsorb table tennis balls located in the transmitting holes. The invention has the advantages of preventing the ping-pong ball from being separated from the transmitting hole by mistake, etc.
Description
Technical Field
The invention belongs to the technical field of entertainment equipment, and relates to a table tennis positioning mechanism on a table tennis service robot.
Background
The table tennis service robot is a necessary entertainment and training tool for many ball houses and ball friends families, can serve various requirements, can be used for entertainment and body building, and is suitable for professional training. During the use, people find that the table tennis ball with dust is stuck on the table tennis ball, and the table tennis ball with dust enters the service robot, so that the precision of the table tennis ball conveying device and the service robot in the service robot is seriously affected, and the service robot can be blocked when serious. In addition, dust on the table tennis ball can cause dust to adhere to the surface of the racket, so that the rubber covering aging is accelerated.
Furthermore, the existing table tennis service robot is complex in structure, easy to catch balls and the like, and the service direction and the service height are single, so that the simulation training effect can not be well achieved.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provide a table tennis ball positioning mechanism on a table tennis ball serving machine, and the technical problem to be solved by the invention is how to prevent a table tennis ball from separating from a sending hole when the table tennis ball is not impacted.
The aim of the invention can be achieved by the following technical scheme: the table tennis ball positioning mechanism on the table tennis ball serving machine is characterized in that the table tennis ball serving machine comprises a machine body, an upright post and a ball storage box, wherein the machine body is connected to the upper end of the upright post, the ball storage box is arranged above the machine body, a transmitting barrel is fixedly arranged on the machine body, a transmitting hole is formed in the transmitting barrel, a striking assembly is slidably connected in the transmitting hole, the striking assembly comprises a striking rod, an inner sliding sleeve and an outer sliding sleeve, the outer ends of the inner sliding sleeve and the outer sliding sleeve are fixedly connected, a sliding groove is formed between the inner sliding sleeve and the outer sliding sleeve, the transmitting barrel comprises an inner barrel and an outer barrel, the transmitting hole is positioned in the inner barrel, an air exhaust cavity is formed between the inner barrel and the outer barrel, the outer sliding sleeve is slidably connected in the air exhaust cavity, the striking rod is in threaded connection in the inner sliding sleeve, and a reset spring for connecting the striking assembly and the transmitting barrel is arranged in the sliding groove; the table tennis balls in the ball storage box can fall into the transmitting cylinder; the positioning mechanism comprises a vacuum pump, the vacuum pump is connected with a low-pressure air suction pipe, the exhaust cavity is communicated with the low-pressure air suction pipe through an overflow pipe, a plurality of adsorption holes are formed in the inner cylinder, each adsorption hole is communicated with the exhaust cavity, and the adsorption holes can adsorb table tennis balls positioned in the emission holes.
Because the table tennis ball is light, in the process of waiting for launching, there is the table tennis ball to fly out under the action of external air current, or the table tennis ball can't remain in the launching tube under the inclined state and wait for the condition of striking pole to act on it, for this reason, set up an overflow pipe, make adsorption hole department have the negative pressure, adsorb and fix a position the table tennis ball.
In the table tennis positioning mechanism on the table tennis service robot, when the striking rod moves towards the ball outlet end of the shot in the shot hole, the outer sliding sleeve can cover the air outlet of the overflow pipe in the air exhaust cavity.
In order to avoid the weakening of impact strength or the change of impact angle caused by the negative pressure at the adsorption hole to the adsorption of the table tennis, when the impact rod is in contact with the table tennis, the overflow pipe is closed, and the negative pressure at the adsorption hole disappears, so that the table tennis is in a natural placement state at the moment.
Because the negative pressure is adopted to adsorb the table tennis balls, the negative pressure control pistons and the like, dust and sundries in the transmitting holes and the inflator can be removed, and particularly in the transmitting holes where the table tennis balls are positioned, the table tennis balls can be damaged due to light and tiny impurities.
Drawings
Fig. 1 is a schematic view of the overall structure of the ball dispenser.
Fig. 2 is an enlarged view of a portion a in fig. 1.
Fig. 3 is an enlarged view of a portion B in fig. 1.
Fig. 4 is a schematic diagram of a connection structure between the rotating shaft and the rack.
Fig. 5 is a schematic perspective view of a piston.
In the figure, 11, a machine body; 12. a column; 13. a ball storage box; 21. a launch canister; 22. a transmitting hole; 23. a striker rod; 24. an inner sliding sleeve; 25. an outer sleeve; 26. a chute; 27. an inner cylinder; 28. an outer cylinder; 29. an exhaust chamber; 31. a return spring; 32. a low pressure suction pipe; 41. a piston; 42. a push rod; 43. a leather washer; 44. an overflow pipe; 45. adsorption holes; 46. an air cylinder; 51. a first valve plate; 52. a second valve plate; 53. a pin shaft; 54. a spring; 55. a turbine; 56. a valve hole I; 57. a valve hole II; 58. a travel cavity; 59. a control chamber; 61. ball separating box; 62. dividing the ball blocks; 63. a rotating shaft; 64. a receiving chamber; 65. a gear; 66. a rack; 71. a high pressure suction pipe; 72. a spool; 73. a valve cavity; 74. a notch; 75. a vent groove; 76. a communication groove; 8. and (5) locking the nut.
Detailed Description
The following are specific embodiments of the present invention and the technical solutions of the present invention will be further described with reference to the accompanying drawings, but the present invention is not limited to these embodiments.
As shown in fig. 1, the automatic table tennis ball serving machine comprises a machine body 11, a stand column 12 and a ball storage box 13, wherein the machine body 11 is connected to the upper end of the stand column 12, the ball storage box 13 is arranged above the machine body 11, a transmitting cylinder 21 is fixedly arranged on the machine body 11, a transmitting hole 22 is formed in the transmitting cylinder 21, a striking assembly is connected in a sliding manner in the transmitting hole 22 and comprises a striking rod 23, an inner sliding sleeve 24 and an outer sliding sleeve 25, the inner sliding sleeve 24 is fixedly connected with the outer end of the outer sliding sleeve 25, a sliding groove 26 is formed between the inner sliding sleeve 24 and the outer sliding sleeve 25, the transmitting cylinder 21 comprises an inner cylinder 27 and an outer cylinder 28, the transmitting hole 22 is positioned in the inner cylinder 27, an air exhaust cavity 29 is formed between the inner cylinder 27 and the outer cylinder 28, the outer sliding sleeve 25 is connected in the air exhaust cavity 29 in a sliding manner, the striking rod 23 is connected in the inner sliding sleeve 24 in a sliding manner, and a reset spring 31 for connecting the striking assembly and the transmitting cylinder 21 is arranged in the sliding groove 26. The table tennis balls in the ball storage box 13 can fall into the transmitting cylinder 21; a drive mechanism is provided between the body 11 and the striking assembly to drive the striking rod 23 to move within the firing barrel 21.
By arranging the inner sliding sleeve 24, the outer sliding sleeve 25, the inner barrel 27 and the outer barrel 28, the guide precision between the impact assembly and the machine body 11 is high, and the region where the return spring 31 is located is completely isolated from the transmitting hole 22, so that scraps formed by spring deformation are prevented from entering the transmitting hole 22.
Moreover, due to the threaded connection between the striking rod 23 and the inner sleeve 24, the radial position of the striking rod 23 is adjustable to adjust the intensity and range at the time of service.
The driving mechanism is a hydraulic cylinder, a push rod of the hydraulic cylinder is fixedly connected with the impact rod 23, and a cylinder body of the hydraulic cylinder is fixed on the machine body 11.
As shown in fig. 1, 2 and 5, the driving mechanism comprises a vacuum pump, the vacuum pump is connected with a low-pressure air suction pipe 32, the low-pressure air suction pipe 32 is connected with an air cylinder 46, a piston 41 is connected in the air cylinder 46 in a sliding way, one side of the piston 41 is connected with a push rod 42, the push rod 42 is fixedly connected with the impact rod 23, a control valve is arranged in the air cylinder 46, the control valve divides the inner cavity of the air cylinder 46 into a travel cavity 58 close to one side of the piston 41 and a control cavity 59 far away from one side of the piston 41, and the low-pressure air suction pipe 32 is communicated with the control cavity 59; the outer ring of the piston 41 is provided with a rubber gasket 43 to seal the piston 41 against the inner wall of the cylinder 46 when moving towards the control chamber 59, and a gap is provided between the piston 41 and the inner wall of the cylinder 46 when moving towards the stroke chamber 58.
The piston 41 moves in the air cylinder 46, and in synchronization with the movement of the striking rod 23 in the emission hole 22, the control valve is opened, so that negative pressure acts on the piston 41, the piston 41 moves rightward in synchronization with the striking rod 23, and after striking the table tennis ball, the control valve is closed, and the return spring 31 drives the piston 41 and the striking rod 23 to return.
The frequency, duration and the like of opening and closing of the control valve can be controlled to control the ball serving frequency and the ball serving force.
The exhaust cavity 29 is communicated with the control cavity 59 through an overflow pipe 44, a plurality of adsorption holes 45 are formed in the inner barrel 27, each adsorption hole 45 is communicated with the exhaust cavity 29, and the adsorption holes 45 can adsorb table tennis balls positioned in the transmitting holes 22. Because the table tennis ball is light, in the process of waiting for launching, there is the condition that the table tennis ball is floated out under the action of external air flow, or the table tennis ball can not stay in the launching tube 21 in an inclined state and wait for the impact rod 23 to act on the table tennis ball, therefore, an overflow pipe 44 is arranged, negative pressure exists at the adsorption hole 45, and the table tennis ball is adsorbed and positioned.
The outer slide sleeve 25 can conceal the outlet of the overflow tube 44 in the exhaust chamber 29 when the strike bar 23 moves within the firing aperture 22 towards the firing ball outlet. In order to avoid the weakening of impact strength or the change of impact angle caused by the negative pressure at the adsorption hole 45 to the table tennis adsorption, when the impact rod 23 is in contact with the table tennis, the overflow pipe 44 is closed, and the negative pressure at the adsorption hole 45 disappears, so that the table tennis is in a natural placing state at the moment.
Because of the negative pressure adsorption of the table tennis balls, the negative pressure control piston 41 and the like, dust and sundries in the transmitting holes 22 and the inflator 46 can be removed, and particularly, the light and tiny impurities in the transmitting holes 22 where the table tennis balls are positioned can possibly cause the table tennis balls to be damaged.
As shown in fig. 1 and 2, the control valve comprises a first valve plate 51 and a second valve plate 52, a pin shaft 53 is fixedly arranged on the first valve plate 51, the second valve plate 52 is sleeved on the pin shaft 53, the second valve plate 52 is connected with the pin shaft 53 through a spring 54, a turbine 55 is fixedly arranged on the pin shaft 53, the turbine 55 is positioned in a control cavity 59, an outlet of the low-pressure air suction pipe 32 is opposite to an inlet of the overflow pipe 44, and the turbine 55 is positioned on a connecting line between the outlet of the low-pressure air suction pipe 32 and the inlet of the overflow pipe 44; the first valve plate 51 is provided with a first valve hole 56, the second valve plate 52 is provided with a second valve hole 57 which can be communicated with the first valve hole 56 in a pair and is communicated with a control cavity 59 and a stroke cavity 58, and the first valve hole 56 and the second valve hole 57 are in a dislocation state under the natural state of the spring 54.
In performing table tennis exercises, it is desirable to have a constant shot of the table tennis, which is obviously not ideal if the control valve is controlled manually.
The negative pressure continuously acts to form strong air flow between the overflow pipe 44 and the low-pressure air suction pipe 32, the air flow acts on the turbine 55 to enable the pin shaft 53 to rotate, so that the first valve plate 51 and the second valve plate 52 are twisted, the negative pressure in the stroke cavity 58 is increased, the piston 41 and the impact rod 23 move to finish impact emission of the table tennis, when the impact rod 23 moves, the outer sliding sleeve 25 closes the air outlet end of the overflow pipe 44, the restoring force of the spring 54 enables the first valve plate 51 and the second valve plate 52 to restore to the initial position, the negative pressure of the piston 41 disappears, the piston 41 and the impact rod 23 are restored under the restoring force of the spring, and the overflow pipe 44 is reopened, so that the continuous emission of the table tennis can be realized by repeating.
As shown in fig. 1 and 4, a cylindrical ball separating box 61 is connected between the ball storing box 13 and the transmitting hole 22, a ball separating block 62 is arranged in the ball separating box 61, the ball separating block 62 is connected with the ball separating box 61 through a rotating shaft 63, a containing cavity 64 is arranged on the ball separating block 62, a gear 65 is fixedly arranged on the rotating shaft 63, a rack 66 capable of engaging the gear 65 is fixedly arranged on the striking rod 23, and an opening of the containing cavity 64 can be communicated with the transmitting hole 22 or the ball storing box 13.
During the process of striking the table tennis ball by the striking rod 23, the rack 66 moves to enable the rotating shaft 63 to rotate 180 degrees, the table tennis ball in the ball storage box 13 can alternatively enter the accommodating cavity 64, when the striking rod 23 is reset, the rack 66 is reset, the rotating shaft 63 rotates to enable the opening of the accommodating cavity 64 to face to be communicated with the transmitting hole 22, and the table tennis ball in the accommodating cavity 64 enters the transmitting hole 22.
Through the structure, not only can the ball separation and the ball serving synchronization be realized, but also only one table tennis ball can be separated each time, thereby avoiding the occurrence of the problems of ball clamping and the like.
As shown in fig. 1 and 3, the vacuum pump is further connected with a high-pressure air suction pipe 71, a valve column 72 is fixedly arranged at the upper end of the upright post 12, a valve cavity 73 is arranged on the machine body 11, the valve column 72 is longitudinally and slidably connected in the valve cavity 73, the valve cavity 73 is divided by the valve column 72 into a pressure release cavity positioned above the valve column 72 and a negative pressure cavity positioned below the valve column 72, the high-pressure air suction pipe 71 is communicated with the negative pressure cavity through a notch 74 formed in the inner wall of the lower end of the valve cavity 73, an annular ventilation groove 75 is formed in the middle of the valve column 72, and longitudinally distributed communication grooves 76 are formed in the outer wall surface of the valve column 72 above the ventilation groove 75; when the body 11 moves upward relative to the spool 72, the notch 74, the vent groove 75 and the communication groove 76 can communicate with each other, and the negative pressure chamber communicates with the pressure release chamber.
In table tennis training, it is desirable to increase the simulation of the training by varying the angle of each serving.
The high-pressure air suction pipe 71 provides a negative pressure with larger intensity, in a natural state, the machine body 11 is stressed, the valve column 72 is positioned at the top of the valve cavity 73, namely, the volume of the pressure relief cavity is zero, the volume of the pressure relief cavity is maximum, when negative pressure acts on the pressure relief cavity, the volume of the pressure relief cavity is gradually reduced, the machine body 11 moves upwards relative to the valve column 72, the machine body 11 can move upwards due to a small gap between the valve column 72 and the inner wall of the valve cavity 73, when the machine body 11 moves upwards to a certain height, particularly to a height of 1-5 cm, the notch 74, the ventilation groove 75 and the communication groove 76 are communicated, the negative pressure of the high-pressure air suction pipe 71 acts on the pressure relief cavity and the negative pressure relief cavity at the same time, so that the machine body 11 is stressed downwards, the pressure relief cavity and the pressure relief cavity are separated again in the downward moving process, and the machine body 11 is in a longitudinal jumping state relative to the valve column 72 repeatedly, so that the randomness and uncertainty of the ball-sending are realized, and the simulation effect is improved.
The inner wall of the valve cavity 73 is in threaded connection with the outer wall of the valve column 72; when the spool 72 longitudinally reciprocates in the valve cavity 73, the maximum rotation angle of the machine body 11 relative to the upright post 12 is 5-20 degrees. In the process of the up-and-down jumping of the machine body 11, the inner wall of the valve cavity 73 is in threaded connection with the valve column 72, so that the machine body 11 is in a rotary reciprocating motion state in the process of the longitudinal jumping, and the simulation effect and the randomness are further improved.
The striker rod 23 is screwed with a lock nut 8. After adjusting the position of the striker rod 23, it is locked by means of the lock nut 8.
The specific embodiments described herein are offered by way of example only to illustrate the spirit of the invention. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.
Claims (2)
1. The table tennis ball positioning mechanism on a table tennis ball serving machine is characterized in that the table tennis ball serving machine comprises a machine body (11), a stand column (12) and a ball storage box (13), wherein the machine body (11) is connected to the upper end of the stand column (12), the ball storage box (13) is arranged above the machine body (11), a transmitting cylinder (21) is fixedly arranged on the machine body (11), a transmitting hole (22) is formed in the transmitting cylinder (21), an impact assembly is connected in the transmitting hole (22) in a sliding manner, the impact assembly comprises an impact rod (23), an inner sliding sleeve (24) and an outer sliding sleeve (25), the outer ends of the inner sliding sleeve (24) and the outer sliding sleeve (25) are fixedly connected, a sliding groove (26) is formed between the inner sliding sleeve (24) and the outer sliding sleeve (25), the transmitting cylinder (21) comprises an inner cylinder (27) and an outer cylinder (28), a row of transmitting holes (22) are formed between the inner cylinder (27) and the outer cylinder (28), the inner cylinder (27) is connected in a sliding manner in an inner sliding cavity (24) in the sliding manner, the sliding sleeve (24) is connected in a sliding manner in the sliding cavity (29), a return spring (31) which is connected with the impact assembly and the launching cylinder (21) is arranged in the chute (26);
the striking rod (23) is connected with a locking nut (8) in a threaded manner;
the table tennis balls in the ball storage box (13) can fall into the transmitting cylinder (21); the positioning mechanism comprises a vacuum pump, the vacuum pump is connected with a low-pressure air suction pipe (32), the exhaust cavity (29) is communicated with the low-pressure air suction pipe (32) through an overflow pipe (44), a plurality of adsorption holes (45) are formed in the inner cylinder (27), each adsorption hole (45) is communicated with the exhaust cavity (29), and the adsorption holes (45) can adsorb table tennis balls positioned in the transmission holes (22).
2. A table tennis positioning mechanism on a table tennis service robot according to claim 1, wherein the outer sliding sleeve (25) is adapted to conceal the air outlet of the overflow tube (44) in the air outlet chamber (29) when the striking rod (23) moves towards the ball outlet end of the launch in the launch hole (22).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811422319.8A CN109200560B (en) | 2018-11-27 | 2018-11-27 | Table tennis positioning mechanism on table tennis service robot |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811422319.8A CN109200560B (en) | 2018-11-27 | 2018-11-27 | Table tennis positioning mechanism on table tennis service robot |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109200560A CN109200560A (en) | 2019-01-15 |
| CN109200560B true CN109200560B (en) | 2023-10-27 |
Family
ID=64994630
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811422319.8A Active CN109200560B (en) | 2018-11-27 | 2018-11-27 | Table tennis positioning mechanism on table tennis service robot |
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| Country | Link |
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| CN (1) | CN109200560B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1243018A (en) * | 1992-10-09 | 2000-02-02 | 约瑟夫·E·纽格登 | Combined cheep robot ball-serving device in front of net |
| JP2007259901A (en) * | 2006-03-27 | 2007-10-11 | Meng-Fu Chen | Table tennis ball shooting apparatus |
| CN202700023U (en) * | 2012-07-20 | 2013-01-30 | 苏州大学 | Impact device of table tennis ball sending machine |
| CN208031828U (en) * | 2018-04-09 | 2018-11-02 | 漯河医学高等专科学校 | A kind of adjustable for height table tenning ball servicing machine |
| CN209137918U (en) * | 2018-11-27 | 2019-07-23 | 湖北科技学院 | A kind of table tennis positioning mechanism on table tenning ball servicing machine |
-
2018
- 2018-11-27 CN CN201811422319.8A patent/CN109200560B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1243018A (en) * | 1992-10-09 | 2000-02-02 | 约瑟夫·E·纽格登 | Combined cheep robot ball-serving device in front of net |
| JP2007259901A (en) * | 2006-03-27 | 2007-10-11 | Meng-Fu Chen | Table tennis ball shooting apparatus |
| CN202700023U (en) * | 2012-07-20 | 2013-01-30 | 苏州大学 | Impact device of table tennis ball sending machine |
| CN208031828U (en) * | 2018-04-09 | 2018-11-02 | 漯河医学高等专科学校 | A kind of adjustable for height table tenning ball servicing machine |
| CN209137918U (en) * | 2018-11-27 | 2019-07-23 | 湖北科技学院 | A kind of table tennis positioning mechanism on table tenning ball servicing machine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109200560A (en) | 2019-01-15 |
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