CN109200560A - A kind of table tennis positioning mechanism on table tenning ball servicing machine - Google Patents
A kind of table tennis positioning mechanism on table tenning ball servicing machine Download PDFInfo
- Publication number
- CN109200560A CN109200560A CN201811422319.8A CN201811422319A CN109200560A CN 109200560 A CN109200560 A CN 109200560A CN 201811422319 A CN201811422319 A CN 201811422319A CN 109200560 A CN109200560 A CN 109200560A
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- Prior art keywords
- sliding sleeve
- table tennis
- launching tube
- hole
- discharge chamber
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- 230000007246 mechanism Effects 0.000 title claims abstract description 15
- 238000001179 sorption measurement Methods 0.000 claims abstract description 20
- 230000035939 shock Effects 0.000 claims description 8
- 238000000926 separation method Methods 0.000 description 9
- 239000000428 dust Substances 0.000 description 6
- 230000033001 locomotion Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000001360 synchronised effect Effects 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 230000002045 lasting effect Effects 0.000 description 2
- 239000010985 leather Substances 0.000 description 2
- 230000003313 weakening effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000004807 localization Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000004088 simulation 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 present invention provides the table tennis positioning mechanisms on a kind of table tenning ball servicing machine, belong to amusement equipment technical field.This table tenning ball servicing machine includes body, column and storage ball case, body is connected to the upper end of column, the top of body is arranged in storage ball case, and a launching tube is fixedly installed on body, has launch hole in launching tube, positioning mechanism includes a vacuum pump, vacuum pump connects a low pressure air suction pipe, is connected between discharge chamber and low pressure air suction pipe by an overflow pipe, several adsorption holes are offered on inner cylinder, each adsorption hole is communicated with discharge chamber, and adsorption hole can adsorb the table tennis in launch hole.The present invention has many advantages, such as that table tennis can be prevented accidentally to be detached from launch hole.
Description
Technical field
The invention belongs to amusement equipment technical field, a kind of be related on table tenning ball servicing machine table tennis positioning mechanism.
Background technique
Table tenning ball servicing machine is indispensable amusement and the training tool of many arenas and friend of sports fan family, can send out property various
It asks, not only may be used as entertainment body-building, but also be suitable for professional training.In use, it has been found that due to being stained on table tennis
Dust, the table tennis for being stained with dust enter service robot, make the precision of the table tennis transmitting device and serving mechanism in service robot by
To seriously affecting, table tenning ball servicing machine card ball will lead to when serious.It is stained in addition, the dust on table tennis will lead to racket surface
Dust accelerates set glue aging.
Furthermore situations such as structure is complicated for existing table tenning ball servicing machine, is easy to appear card ball, and reversed and service of serving a ball
It is highly single, the effect of simulation training can not be played well.
Summary of the invention
In view of the above problems existing in the prior art, the purpose of the present invention is to provide the table tennis on a kind of table tenning ball servicing machine
Pang ball positioning mechanism, the technical problem to be solved by the present invention is to how prevent table tennis to be detached from transmitting when not being knocked
Hole.
Object of the invention can be realized by the following technical scheme: the table tennis localization machine on a kind of table tenning ball servicing machine
Structure, which is characterized in that this table tenning ball servicing machine includes body, column and storage ball case, and the body is connected to the upper end of column, institute
The top that body is arranged in storage ball case is stated, a launching tube is fixedly installed on the body, there is launch hole in the launching tube,
Slidably connect a shock component in the launch hole, the shock component includes trip rod, inner sliding sleeve and outer sliding sleeve, it is described in
The outer end of sliding sleeve and outer sliding sleeve is fixedly linked, and a sliding slot is formed between the inner sliding sleeve and outer sliding sleeve, and the launching tube includes interior
Cylinder and outer cylinder, the launch hole are located within inner cylinder, and a discharge chamber, the outer sliding sleeve sliding are formed between the inner barrel and outer barrel
It is connected in discharge chamber, the trip rod is threaded within inner sliding sleeve, and the inner sliding sleeve is slidably connected in sliding slot, described
The reset spring that in sliding slot there is connection to hit component and launching tube；Table tennis in the storage ball case can be fallen into launching tube
It is interior；The positioning mechanism includes a vacuum pump, and the vacuum pump connects a low pressure air suction pipe, the discharge chamber and low pressure air suction pipe
Between be connected by an overflow pipe, several adsorption holes are offered on the inner cylinder, each adsorption hole is communicated with discharge chamber, the suction
Attached hole can adsorb the table tennis in launch hole.
Since table tennis is light, during waiting to be launched, is acted on and blown out by external air flow there are table tennis, or
Launching tube, which is in table tennis under heeling condition, can not remain in the case where waiting trip rod to act on it in launching tube, for this purpose, setting
An overflow pipe is set, makes at adsorption hole that there are negative pressure, table tennis is adsorbed and is positioned.
In the table tennis positioning mechanism on a kind of above-mentioned table tenning ball servicing machine, the trip rod is in launch hole to hair
When the ball end out penetrated is mobile, the outer sliding sleeve can cover gas outlet of the overflow pipe in discharge chamber.
In order to avoid the negative pressure at adsorption hole causes the weakening of impact strength or changing for projected angle of impact to table tennis absorption
Become, when trip rod will contact table tennis, overflow pipe is closed, and negative pressure disappears at adsorption hole, makes table tennis at the moment
In natural placement status.
Due to using negative-pressure adsorption table tennis, vacuum cavitations piston etc., in launch hole, the dust in inflator and sundries can
It is removed, especially in launch hole locating for table tennis, light tiny impurity is likely to will cause table tennis breakage.
Detailed description of the invention
Fig. 1 is the overall structure diagram of this service robot.
Fig. 2 is the enlarged drawing of part A in Fig. 1.
Fig. 3 is the enlarged drawing of part B in Fig. 1.
Fig. 4 is the attachment structure schematic diagram between shaft and rack gear.
Fig. 5 is the schematic perspective view of piston.
In figure, 11, body；12, column；13, storage ball case；21, launching tube；22, launch hole；23, trip rod；24, interior cunning
Set；25, outer sliding sleeve；26, sliding slot；27, inner cylinder；28, outer cylinder；29, discharge chamber；31, reset spring；32, low pressure air suction pipe；41,
Piston；42, mandril；43, leather washer；44, overflow pipe；45, adsorption hole；46, inflator；51, the first valve block；52, the second valve block；
53, pin shaft；54, clockwork spring；55, turbine；56, valve opening one；57, valve opening two；58, stroke chamber；59, control chamber；61, bulb separation box；62,
Bulb separation block；63, shaft；64, accommodating cavity；65, gear；66, rack gear；71, high pressure air intake duct；72, valve rod；73, valve chamber；74, it lacks
Mouthful；75, air channel；76, connectivity slot；8, locking nut.
Specific embodiment
Following is a specific embodiment of the present invention in conjunction with the accompanying drawings, technical scheme of the present invention will be further described,
However, the present invention is not limited to these examples.
As shown in Figure 1, this table tennis automatic pitching machine includes body 11, column 12 and storage ball case 13, body 11 is connected to
The top of body 11 is arranged in the upper end of column 12, storage ball case 13, and a launching tube 21, launching tube 21 are fixedly installed on body 11
It is interior that there is launch hole 22, a shock component is slidably connected in launch hole 22, hitting component includes trip rod 23,24 and of inner sliding sleeve
The outer end of outer sliding sleeve 25, inner sliding sleeve 24 and outer sliding sleeve 25 is fixedly linked, and a sliding slot 26 is formed between inner sliding sleeve 24 and outer sliding sleeve 25,
Launching tube 21 includes inner cylinder 27 and outer cylinder 28, and launch hole 22 is located within inner cylinder 27, and shape is in a row between inner cylinder 27 and outer cylinder 28
Air cavity 29, outer sliding sleeve 25 are slidably connected in discharge chamber 29, and trip rod 23 is threaded within inner sliding sleeve 24, and inner sliding sleeve 24 is sliding
Reset spring 31 that is dynamic to be connected in sliding slot 26, in sliding slot 26 there is connection to hit component and launching tube 21；In storage ball case 13
Table tennis can be fallen into launching tube 21；Driving trip rod 23 is provided between body 11 and shock component in launching tube 21
Mobile driving mechanism.
By setting inner sliding sleeve 24, outer sliding sleeve 25, inner cylinder 27 and outer cylinder 28, make to hit guiding essence between component and body 11
Degree is high, and completely isolated between 31 region of reset spring and launch hole 22, and the scrap for avoiding spring deformation from being formed enters
In launch hole 22.
Moreover, because being threadedly coupled between trip rod 23 and inner sliding sleeve 24, keep the radial position of trip rod 23 adjustable, to adjust
Intensity and range when section service.
Driving mechanism is hydraulic cylinder, and push rod and the trip rod 23 of hydraulic cylinder are fixedly linked, and the cylinder body of hydraulic cylinder is fixed on machine
On body 11.
As shown in Figure 1, Figure 2 and shown in Fig. 5, driving mechanism includes a vacuum pump, and vacuum pump connects a low pressure air suction pipe 32, low pressure
Air intake duct 32 connects an inflator 46, and a piston 41 is slidably connected in inflator 46, and the side of piston 41 connects a mandril 42, mandril
42 are fixedly linked with trip rod 23, have one to be provided with a control valve in inflator 46, the inner cavity of inflator 46 is divided by control valve
Stroke chamber 58 close to 41 side of piston and the control chamber 59 far from 41 side of piston, low pressure air suction pipe 32 are connected to control chamber 59；
41 outer ring of piston is provided with a leather washer 43, makes to seal when piston 41 is mobile to control chamber 59 with 46 inner wall of inflator, and piston 41
There is gap between 46 inner wall of inflator when mobile to 58 direction of stroke chamber.
Movement of the piston 41 in inflator 46, it is mobile synchronous in launch hole 22 with trip rod 23, it is opened by control valve
It opens, makes suction function on piston 41, piston 41 is synchronous with trip rod 23 to be moved to the right, and after hitting table tennis, control valve is closed
It closes, reset spring 31 drives piston 41 and trip rod 23 to reset.
It can be controlled by frequency, the unlatching duration etc. opened and closed to control valve, to realize service frequency
The control of rate and service dynamics.
It is connected between discharge chamber 29 and control chamber 59 by an overflow pipe 44, several adsorption holes is offered on inner cylinder 27
45, each adsorption hole 45 is communicated with discharge chamber 29, and adsorption hole 45 can adsorb the table tennis in launch hole 22.Due to table tennis
It is light, during waiting to be launched, is blown out there are table tennis by external air flow effect or launching tube 21 is in skewed
Table tennis can not remain in the case where waiting trip rod 23 to act on it in launching tube 21 under state, for this purpose, one overflow pipe 44 of setting,
Make at adsorption hole 45 that there are negative pressure, table tennis is adsorbed and is positioned.
When trip rod 23 is mobile to the ball end out of transmitting in launch hole 22, outer sliding sleeve 25 can cover overflow pipe 44 and arrange
Gas outlet in air cavity 29.In order to avoid the negative pressure at adsorption hole 45 causes the weakening of impact strength to table tennis absorption, or
The change of projected angle of impact, when trip rod 23 will contact table tennis, overflow pipe 44 is closed, and negative pressure disappears at adsorption hole 45,
Table tennis is set to be in nature placement status in the moment.
Due to using negative-pressure adsorption table tennis, vacuum cavitations piston 41 etc., in launch hole 22, the dust in inflator 46 and miscellaneous
Object can be removed, and especially in launch hole 22 locating for table tennis, light tiny impurity is likely to will cause table tennis broken
Damage.
As depicted in figs. 1 and 2, control valve includes the first valve block 51 and the second valve block 52, is fixedly installed on the first valve block 51
There is a pin shaft 53, the second valve block 52 is set on pin shaft 53, is connected between the second valve block 52 and pin shaft 53 by a clockwork spring 54, is sold
A turbine 55 is further fixedly arranged on axis 53, turbine 55 is located in control chamber 59, the outlet of low pressure air suction pipe 32 and overflow pipe 44
Entrance face, turbine 55 is located on the line between the outlet of low pressure air suction pipe 32 and the entrance of overflow pipe 44；First valve block
There is valve opening 1, having on the second valve block 52 can be logical and be connected to control chamber 59 and stroke chamber 58 with one 56 pairs of valve opening on 51
Valve opening 2 57, valve opening 1 and valve opening 2 57 are in misaligned state in clockwork spring 54 in its natural state.
When carrying out table tennis practice, it is desirable to the lasting transmitting of table tennis, if control valve is by artificially controlling, it is clear that be not
It is highly desirable.
Negative pressure continuous action makes to form air blast between overflow pipe 44 and low pressure air suction pipe 32, and airflow function is in turbine 55
On, pin shaft 53 is rotated, so that the first valve block 51 and the second valve block 52 is made to twist, valve hole 1 and valve opening 2 57,
To make negative pressure in stroke chamber 58 increase, piston 41 and trip rod 23 are mobile, complete the shock to table tennis and emit, work as trip rod
When 23 movement, outer sliding sleeve 25 closes the outlet side of overflow pipe 44, and the restoring force of clockwork spring 54 makes the first valve block 51 and the second valve block 52
Restore initial position, the negative pressure of piston 41 disappears, and in spring-return power, piston 41 and trip rod 23 reset, and overflow pipe 44 is weighed
It is new to open, repeatedly, the lasting transmitting of table tennis may be implemented.
As shown in Figure 1 and Figure 4, a cylindric bulb separation box 61, bulb separation box are connected between storage ball case 13 and launch hole 22
A bulb separation block 62 is provided in 61, bulb separation block 62 is connected by a shaft 63 with bulb separation box 61, has an accommodating on bulb separation block 62
Chamber 64 is fixedly installed a gear 65 in shaft 63, the rack gear 66 for capableing of meshing gear 65 is fixedly installed on trip rod 23, holds
The opening for setting chamber 64 can be communicated with launch hole 22 or storage ball case 13.
During trip rod 23 hits table tennis, rack gear 66 is mobile, so that shaft 63 is rotated 180 °, storage ball case 13
Interior table tennis can select one and enter in accommodating cavity 64, and when trip rod 23 resets, rack gear 66 resets, and shaft 63 rotates, and make to accommodate
The opening direction of chamber 64, communicates with launch hole 22, and the table tennis in accommodating cavity 64 enters in launch hole 22.
By this structure, it is synchronous with service that bulb separation not only may be implemented, but also can ensure and only be assigned to one every time
Table tennis, thus the generation for the problems such as avoiding card ball.
As shown in figures 1 and 3, vacuum pump is also connected with a high pressure air intake duct 71, and the upper end of column 12 is fixedly installed a valve
Column 72 has a valve chamber 73 on body 11, and 72 longitudinal sliding motion of valve rod is connected in valve chamber 73, and valve chamber 73 is divided into position by valve rod 72
Pressure-releasing chamber above valve rod 72 and the negative pressure cavity positioned at 72 lower section of valve rod, high pressure air intake duct 71 are provided under valve chamber 73 by one
Notch 74 on the inner wall at end is connected to negative pressure cavity, and the middle part of valve rod 72 has the air channel 75 of an annular, 75 top of air channel
72 outside wall surface of valve rod on offer the connectivity slot 76 of genesis analysis；When body 11 is moved up with respect to valve rod 72, notch 74, air channel
75 and connectivity slot 76 can intercommunication, and communicate negative pressure cavity with pressure-releasing chamber.
When carrying out table tennis training, it is desirable to which the angle served a ball every time is different, to improve the fidelity of training.
High pressure air intake duct 71 provides the negative pressure of larger intensity, and in its natural state, body 11 is located at valve chamber by weight, valve rod 72
73 top, i.e. pressure-releasing chamber volume are zero, and negative pressure cavity volume is maximum, when suction function is in negative pressure cavity, by suction function, are born
Pressure chamber volume is gradually reduced, and body 11 is moved up with respect to valve rod 72, due to the fine gap between 73 inner wall of valve rod 72 and valve chamber, machine
Body 11 can move up, when moving to certain altitude on body 11, specifically when the height of 1~5cm, and notch 74, air channel
75 and 76 intercommunication of connectivity slot, the negative pressure of high pressure air intake duct 71 acts on negative pressure cavity and pressure-releasing chamber simultaneously, so that body 11 is by under again
It moves, in folding process, negative pressure cavity and pressure-releasing chamber are separated again, and repeatedly, body 11 is in longitudinal bounce with respect to valve rod 72
State improves simulated effect to realize the randomness and uncertainty of service.
It is threadedly coupled between the inner wall of valve chamber 73 and the outer wall of valve rod 72；The longitudinally reciprocating motion in valve chamber 73 of valve rod 72
When, the hard-over that body 11 is rotated relative to column 12 is between 5~20 °.During body 11 moves up and down, due to valve
It is threadedly coupled between 73 inner wall of chamber and valve rod 72, also in the shape of rotary reciprocating motion during making body 11 longitudinally beat
State further increases simulated effect and randomness.
A locking nut 77 is threaded on trip rod 23.After adjusting 23 position of trip rod, pass through locking nut 77
It is locked.
Specific embodiment described herein is only an example for the spirit of the invention.The neck of technology belonging to the present invention
The technical staff in domain can make various modifications or additions to the described embodiments or replace by a similar method
In generation, however, it does not deviate from the spirit of the invention or beyond the scope of the appended claims.
Claims (2)
1. the table tennis positioning mechanism on a kind of table tenning ball servicing machine, which is characterized in that this table tenning ball servicing machine includes body
(11), column (12) and storage ball case (13), the body (11) are connected to the upper end of column (12), storage ball case (13) setting
It is fixedly installed a launching tube (21) on the top of body (11), the body (11), there is hair in the launching tube (21)
Perforation (22), the launch hole (22) is interior to slidably connect a shock component, and the shock component includes trip rod (23), interior cunning
Cover (24) and outer sliding sleeve (25), the outer end of the inner sliding sleeve (24) and outer sliding sleeve (25) is fixedly linked, the inner sliding sleeve (24) and
It is formed between outer sliding sleeve (25) sliding slot (26), the launching tube (21) includes inner cylinder (27) and outer cylinder (28), the launch hole
(22) it is located within inner cylinder (27), forms a discharge chamber (29), the outer sliding sleeve between the inner cylinder (27) and outer cylinder (28)
(25) it is slidably connected in discharge chamber (29), the trip rod (23) is threaded within inner sliding sleeve (24), the inner sliding sleeve
(24) it is slidably connected in sliding slot (26), the reset spring that in the sliding slot (26) there is connection to hit component and launching tube (21)
(31)；Table tennis in the storage ball case (13) can be fallen into launching tube (21)；The positioning mechanism includes a vacuum pump,
The vacuum pump connects a low pressure air suction pipe (32), passes through an overflow pipe between the discharge chamber (29) and low pressure air suction pipe (32)
(44) it is connected, is offered several adsorption holes (45) on the inner cylinder (27), each adsorption hole (45) communicates with discharge chamber (29), institute
The table tennis in launch hole (22) can be adsorbed by stating adsorption hole (45).
2. the table tennis positioning mechanism on a kind of table tenning ball servicing machine according to claim 1, which is characterized in that the shock
When bar (23) is mobile to the ball end out of transmitting in launch hole (22), the outer sliding sleeve (25) can cover overflow pipe (44) and arrange
Gas outlet in air cavity (29).
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 true CN109200560A (en) | 2019-01-15 |
| CN109200560B 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 |
Country Status (1)
| Country | Link |
|---|---|
| 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 |
|---|---|
| CN109200560B (en) | 2023-10-27 |
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