CN102764498B - Volleyball smash training equipment - Google Patents
Volleyball smash training equipment Download PDFInfo
- Publication number
- CN102764498B CN102764498B CN201210270550.6A CN201210270550A CN102764498B CN 102764498 B CN102764498 B CN 102764498B CN 201210270550 A CN201210270550 A CN 201210270550A CN 102764498 B CN102764498 B CN 102764498B
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- blocking arm
- circuit
- driver element
- control signal
- blocking
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Abstract
The invention discloses volleyball smash training equipment and relates to physical training equipment, in particular to volleyball training equipment. The invention provides the volleyball smash training equipment aiming at the volleyball smash training. A control device of the volleyball smash training equipment is used for sending a control signal to a traveling vehicle driving unit; the traveling vehicle driving unit is used for driving a traveling vehicle to take the one-dimensional reciprocating motion; a fixed seat is fixed on the traveling vehicle; a retaining arm fixing device is fixed on the fixed seat; a plurality of retaining arms which are arranged along the traveling direction of the traveling vehicle are fixed at the upper end of the retaining arm fixing device; the tail end of each retaining arm is of a palm shape; the tail ends of a plurality of retaining arms are positioned on the same plane; and a lifting driving unit for driving a lifting device to drive the retaining arms to take the lifting and descending motion can also be arranged in the retaining arm fixing device. According to the invention, a remote control circuit can also be adopted to send the control signal to the control device by a wireless signal sending mode. The volleyball smash training equipment is suitable to match with the smash training for use in the volleyball training process.
Description
Technical field
The present invention relates to a kind of athletic training equipment, be specifically related to volleyball training equipment.
Background technology
In the spiking training of existing volleyball training, the training tool adopting is without block button and has two kinds, block button, have the training of block button relatively to approach under battle conditions, but need other teammates to coordinate, and the teammate's who coordinates level also can have influence on by trainer's exercise level.
The special exercise equipment of also not training for volleyball smash at present.
Summary of the invention
The invention provides a kind of volleyball smash exercise equipment for volleyball smash training.
Volleyball smash exercise equipment of the present invention comprises control device, the moving trolley of one dimension walking, moving trolley driver element, blocking arm fixture, holder and many blocking arms, control device is used for transmitting control signal to moving trolley driver element, this moving trolley driver element is used for driving moving trolley to do one dimension reciprocating motion, described holder is fixed on moving trolley, blocking arm fixture is fixed on holder, the upper end of this blocking arm fixture is fixed with many blocking arms, described many blocking arms are arranged along the direction of travel of moving trolley, the end of every blocking arm is palmation, many blocking arm ends are positioned in same plane.
In above-mentioned blocking arm fixture, can also be provided with lowering or hoisting gear and lifting driver element, described control device sends elevating control signal to lifting driver element, and this lifting driver element is used for driving lowering or hoisting gear to drive blocking arm to do lifting action.
Above-mentioned blocking arm fixture can be made up of multiple blocking arm fixed cells, and each blocking arm fixed cell is used for fixing one or two blocking arms.
In above-mentioned every blocking arm fixed cell, all can be provided with lowering or hoisting gear and lifting driver element, described control device sends elevating control signal to lifting driver element, and this lifting driver element is used for driving lowering or hoisting gear to drive blocking arm to do lifting action.
In above-mentioned blocking arm fixture, can also be provided with angular adjustment apparatus and angle adjustment driver element for every blocking arm, control device sends angle adjustment signal to angle adjustment driver element, this angle adjustment driver element is for driving angular adjustment apparatus to adjust the angle of blocking arm along the direction of travel of moving trolley, the scope of described angle is ± 10 degree that described control device sends angle adjustment control signal to angular adjustment apparatus.
The present invention can also comprise wireless signal receiving circuit and remote control circuit, remote control circuit comprises that wireless signal transtation mission circuit and control signal produce circuit, described control signal produces circuit and produces control signal and send to wireless signal transtation mission circuit, this wireless signal transtation mission circuit sends to wireless signal receiving circuit by transmission of wireless signals mode by described control signal, and the control signal receiving is sent to control device by described wireless signal receiving circuit.
The present invention can also comprise infrared signal receiving circuit and remote control circuit, remote control circuit comprises that infrared signal transtation mission circuit and control signal produce circuit, described control signal produces circuit and produces control signal and send to infrared signal transtation mission circuit, this infrared signal transtation mission circuit sends to infrared signal receiving circuit by infrared signal transmission mode by described control signal, and the control signal receiving is sent to control device by described infrared signal receiving circuit.
The present invention can also comprise switching mat, and described switching mat transmit button signal is to control circuit.
On above-mentioned switching mat, can also be provided with wireless signal transtation mission circuit, in control device, be provided with wireless signal receiving circuit, described switching mat transmit button signal wireless signal sending circuit, this wireless signal transtation mission circuit sends to wireless signal receiving circuit by wireless mode by this switching signal, and the switching signal receiving is sent to control device by this wireless signal receiving circuit.
Volleyball smash exercise equipment of the present invention is being applied in volleyball smash training process, can simulate the athletic action of blocking of block, can also set as required some nonstandard actions of blocking, create the chance of slam-shot to slam-shot sportsman, train them in the situation that not running into nonstandard action of blocking, find slam-shot point and slam-shot opportunity, and then the athletic flexible ability of more effective training slam-shot.
The present invention is applicable in volleyball training process, and combined spike training is used.
Brief description of the drawings
Fig. 1 is the structural representation of volleyball smash exercise equipment of the present invention; Fig. 2 is the blocking arm of the volleyball smash exercise equipment shown in Fig. 1 schematic diagram in retracted state; Fig. 3 is the side view of Fig. 1; Fig. 4 to Fig. 6 is the structural representation of the volleyball smash exercise equipment described in detailed description of the invention five; Fig. 4 is each blocking arm view of stretching out after an angle that tilts; Fig. 5 is the position relationship schematic diagram of baffle plate 9 and blocking arm; Fig. 6 is the backsight perspective effect figure of Fig. 5; Fig. 7 be volleyball smash exercise equipment of the present invention before volleyball net, come and go motion view; The control principle schematic diagram of Fig. 8 volleyball smash exercise equipment of the present invention; Fig. 9 is the schematic diagram when the application state with the volleyball smash exercise equipment of switching mat 8; Figure 10 is the control principle schematic diagram with radio remote control circuit described in detailed description of the invention six.
Detailed description of the invention
Detailed description of the invention one: present embodiment is described referring to Fig. 1.Volleyball smash exercise equipment described in present embodiment comprises control device, the moving trolley 2 of one dimension walking, moving trolley driver element, blocking arm fixture 4, holder 3 and many blocking arms 5, control device is used for transmitting control signal to moving trolley driver element, this moving trolley driver element is used for driving moving trolley to do one dimension reciprocating motion, described holder 3 is fixed on moving trolley, blocking arm fixture 4 is fixed on holder 3, the upper end of this blocking arm fixture 4 is fixed with many blocking arms 5, described many blocking arms 5 are arranged along the direction of travel of moving trolley, the end 6 of every blocking arm 5 is palmation, many blocking arm 5 ends 6 are positioned in same plane.
In present embodiment, the bottom of the moving trolley 2 of one dimension walking is provided with one dimension road wheel 1, or adopts one dimension slideway all can.
In present embodiment, the height of blocking arm end can highly be adjusted by athletic block according to simulated block, and described blocking arm end 6 can be designed to palmation, for simulating the athletic palm of block.
Blocking arm in present embodiment can be set to two or four, simulates respectively the situation of one-man block or double close-up.
Described control device is used for controlling moving trolley simulation block sportsman and does the action that moves left and right of blocking while preparation, and then disturb and spiked by train athletes, reach training slam-shot sportsman select flexibly to spike ski-jump, take-off opportunity and control the adaptability to changes of slam-shot direction.
The mode that above-mentioned control device control moving trolley moves left and right can be STOCHASTIC CONTROL mode, produces at random control command that is:, drives moving trolley to move to the left or to the right.
The mode that above-mentioned control device control moving trolley coordinate moves can also move to the left or to the right according to the control moving trolley of fixed routine.
Volleyball smash exercise equipment described in present embodiment, in the time of practical application, is placed on before net, shown in Figure 7, the volleyball smash exercise equipment described in present embodiment net position, along with the net 7 parallel plane planes in place in move back and forth at one dimension.
Detailed description of the invention two: the difference of the volleyball smash exercise equipment described in present embodiment and detailed description of the invention one is, in blocking arm fixture 4 described in present embodiment, be also provided with lowering or hoisting gear and lifting driver element, described control device sends elevating control signal to lifting driver element, and this lifting driver element is used for driving lowering or hoisting gear to drive blocking arm to do lifting action.
In blocking arm fixture 4 in present embodiment, having increased lowering or hoisting gear, for driving the lifting of blocking arm, shown in Fig. 1 and Fig. 2, is the schematic diagram that blocking arm rises state shown in Fig. 1, is the schematic diagram that blocking arm is fallen state shown in Fig. 2.Increase this lowering or hoisting gear and can simulate the take-off action of block sportsman while blocking, made training process more close under battle conditions.
The mode of the control device control lifting driver element in the volleyball smash exercise equipment described in present embodiment, can adopt random mode, random rise or landing in the process moving left and right at moving trolley.
The mode of the control device control lifting driver element in the volleyball smash exercise equipment described in present embodiment, can adopt fixed program still, coordinates moving trolley rise in the process of walking or land according to the rule of setting.
Detailed description of the invention three: the difference of the volleyball smash exercise equipment described in present embodiment and detailed description of the invention one is, described blocking arm fixture 4 is multiple blocking arm fixed cells compositions, each blocking arm fixed cell is used for fixing one or two blocking arms 5.
Present embodiment has been done further restriction to blocking arm fixture 4, blocking arm fixture 4 in present embodiment adopts multiple blocking arm fixed cell compositions, that is: adopt cellular construction, can adopt a blocking arm fixed cell to fix a blocking arm 5, be convenient to installment and debugging; Can also adopt a blocking arm fixed cell to fix two blocking arms 5, for simulating athletic two the block arms of block, Collaborative Control.
Best mode in aforesaid way is to adopt each unit blocking arm fixed cell to fix two blocking arms, simulate an athletic a pair of arm of block, the height of every pair of arm can regulate according to actual needs, and then simulates the athletic action of blocking of block of different heights.
Detailed description of the invention four: the difference of the volleyball smash exercise equipment described in present embodiment and detailed description of the invention three is, in every blocking arm fixed cell, be provided with lowering or hoisting gear and lifting driver element, described control device sends elevating control signal to lifting driver element, and this lifting driver element is used for driving lowering or hoisting gear to drive blocking arm to do lifting action.
In blocking arm fixed cell in present embodiment, increased lowering or hoisting gear, for driving the lifting of blocking arm, and then the take-off action of simulation block sportsman while blocking, real training process is more close under battle conditions.
In the time being provided with a blocking arm 5 in every blocking arm fixed cell, the lowering or hoisting gear in two adjacent blocking arm fixed cells is controlled for interlock, that is: rise simultaneously or fall simultaneously, and then the action of an athletic a pair of arm of block of simulation.
In the time being provided with two blocking arms in each unit blocking arm fixed cell, the lowering or hoisting gear in this unit control simultaneously described two blocking arms simulate one block athletic a pair of arm action of blocking.
Described lowering or hoisting gear is for realizing the rise or the landing that drive blocking arm 5, and concrete structure can adopt existing techniques in realizing, for example: can adopt pneumatic element to realize, can also adopt Hydraulic Elements to realize, can also adopt motor-driven mechanism to realize etc.
Control device in volleyball smash exercise equipment described in present embodiment can be controlled every lifting driver element in blocking arm fixed cell simultaneously and move simultaneously; Can also control respectively, that is: allow the lifting of different blocking arm fixed cells have the time difference, and then two inconsistent situations of the athletic action of block of simulation, to train the athletic ability of adjusting to changed conditions of slam-shot.
Detailed description of the invention five: referring to present embodiment is described shown in Fig. 4 to 6.The difference of the volleyball smash exercise equipment described in present embodiment and detailed description of the invention one to four any one embodiment is, in described blocking arm fixture 4, be provided with angular adjustment apparatus and angle adjustment driver element for every blocking arm 5, control device sends angle adjustment signal to angle adjustment driver element, this angle adjustment driver element is for driving angular adjustment apparatus to adjust the angle of blocking arm along the direction of travel of moving trolley, the scope of described angle is ± 5 degree that described control device sends angle adjustment control signal to angular adjustment apparatus.
Angle regulator in present embodiment can adopt gear transmission structure to realize, every pair of blocking arm correspondence arranges an angle regulator, for example, referring to shown in Fig. 5 and Fig. 6, Fig. 5 is the rearview of Fig. 6, this angle regulator comprises two pairs of postive stop baffles 9, a pair of wobble gear 10, driven wheel 12 and drive unit, described drive unit is used for driving described driven wheel 12 to rotate, this driven wheel 12 engages with two wobble gears 10 simultaneously, each wobble gear 10 is corresponding with a blocking arm 5, and the diameter of this wobble gear 10 is greater than the transverse width of described blocking arm, two baffle plates 9 of postive stop baffle of partnering lay respectively at the both sides of same blocking arm 5, for limiting the direction of its rise, described two baffle plates 9 are fixed on the wobble gear corresponding with this blocking arm 10.In the time that drive unit drives driven wheel 12 to rotate, driven wheel 12 drives two wobble gears 10 that engage with it to rotate simultaneously, each wobble gear 10 drives a pair of baffle plate being fixedly connected with it to swing certain angle, and then realizes and limit the rise direction that is arranged in this blocking arm to baffle plate.
Above-mentioned drive unit can adopt motor to realize, that is: driven by motor driven wheel 12 rotates.
Control device in volleyball smash exercise equipment described in present embodiment can control simultaneously all blocking arms to stretch out angle consistent, can also control every blocking arm 5 to stretch out angle inconsistent, that is: the different attitudes of simulation block sportsman in the time of block, comprise nonstandard attitude, and then create neutral, the chance of creating slam-shot to slam-shot sportsman, to train the athletic slam-shot flexibility of slam-shot.
Detailed description of the invention six: present embodiment is described referring to Figure 10.The difference of the volleyball smash exercise equipment described in present embodiment and detailed description of the invention one to five is, this equipment also comprises wireless signal receiving circuit and remote control circuit, remote control circuit comprises that wireless signal transtation mission circuit and control signal produce circuit, described control signal produces circuit and produces control signal and send to wireless signal transtation mission circuit, this wireless signal transtation mission circuit sends to wireless signal receiving circuit by transmission of wireless signals mode by described control signal, and the control signal receiving is sent to control device by described wireless signal receiving circuit.
Present embodiment has increased wireless signal receiving circuit and remote control circuit, in actual use, coach can transmit control signal to control device according to the actual conditions of train athletes by remote control circuit, adjust the lifting angle of blocking arm for controlling lifting opportunity of direction of travel, speed, lowering or hoisting gear of moving trolley or angular adjustment apparatus, what provide to coach arranges the technological means of training method flexibly for different training objects.
Described control signal produces circuit and can adopt the circuit taking single-chip microcomputer as core to realize, and also can adopt existing various Digiplex to realize.
Detailed description of the invention seven: the difference of the volleyball smash exercise equipment described in present embodiment and detailed description of the invention one to five is, this equipment also comprises infrared signal receiving circuit and remote control circuit, remote control circuit comprises that infrared signal transtation mission circuit and control signal produce circuit, described control signal produces circuit and produces control signal and send to infrared signal transtation mission circuit, this infrared signal transtation mission circuit sends to infrared signal receiving circuit by infrared signal transmission mode by described control signal, the control signal receiving is sent to control device by described infrared signal receiving circuit.
Present embodiment has increased infrared signal receiving circuit and remote control circuit, in actual use, coach can transmit control signal to control device according to the actual conditions of train athletes by remote control circuit, adjust the lifting angle of blocking arm for controlling lifting opportunity of direction of travel, speed, lowering or hoisting gear of moving trolley or angular adjustment apparatus, what provide to coach arranges the technological means of training method flexibly for different training objects.
Described control signal produces circuit and can adopt the circuit taking single-chip microcomputer as core to realize, and also can adopt existing various IR remote controller to realize.
Detailed description of the invention eight: the difference of the volleyball smash exercise equipment described in present embodiment and detailed description of the invention one to five is, the switching mat 8 that present embodiment has increased, described switching mat 8 transmit button signals are to control device.
Present embodiment has increased switching mat 8, and the signal of this switching mat 8 is exported to control device.
In the time that reality is used, this switching mat 8 is placed on to the slam-shot ski-jump position in slam-shot place, sportsman place, court, shown in Figure 9, in the time that spiking take-off, sportsman steps on this switching mat, these switching mat 8 transmit button signals are to control circuit, control circuit according to this signal enabling moving trolley, lowering or hoisting gear or angular adjustment apparatus, that is:, on sportsman steps on switching mat time, is controlled volleyball smash exercise equipment and is started the action of blocking.
Detailed description of the invention nine: the difference of the volleyball smash exercise equipment described in present embodiment and detailed description of the invention eight is, on described switching mat 8, be provided with wireless signal transtation mission circuit, in control device, be provided with wireless signal receiving circuit, described switching mat 8 transmit button signal wireless signal sending circuits, this wireless signal transtation mission circuit sends to wireless signal receiving circuit by wireless mode by this switching signal, and the switching signal receiving is sent to control device by this wireless signal receiving circuit.
In present embodiment, the communication mode between switching mat 8 and control device adopts wireless signal load mode to realize, and can not affect the motion of one dimension moving trolley.
Claims (8)
1. volleyball smash exercise equipment, it is characterized in that it comprises control device, the moving trolley (2) of one dimension walking, moving trolley driver element, blocking arm fixture (4), holder (3) and many blocking arms (5), control device is used for transmitting control signal to moving trolley driver element, this moving trolley driver element is used for driving moving trolley to do one dimension reciprocating motion, described holder (3) is fixed on moving trolley, blocking arm fixture (4) is fixed on holder (3), the upper end of this blocking arm fixture (4) is fixed with many blocking arms (5), described many blocking arms (5) are arranged along the direction of travel of moving trolley, the end (6) of every blocking arm (5) is palmation, many blocking arms (5) ends (6) are positioned in same plane,
In described blocking arm fixture (4), be provided with angular adjustment apparatus and angle adjustment driver element for every blocking arm (5), control device sends angle adjustment signal to angle adjustment driver element, this angle adjustment driver element is for driving angular adjustment apparatus to adjust the angle of blocking arm along the direction of travel of moving trolley, the scope of described angle is ± 5 degree that described control device sends angle adjustment control signal to angular adjustment apparatus;
Angle regulator adopts gear transmission structure to realize, every pair of blocking arm correspondence arranges an angle regulator, this angle regulator comprises two pairs of postive stop baffles (9), a pair of wobble gear (10), a driven wheel (12) and drive unit, described drive unit is used for driving described driven wheel (12) to rotate, this driven wheel (12) engages with two wobble gears (10) simultaneously, each wobble gear (10) is corresponding with a blocking arm (5), and the diameter of this wobble gear (10) is greater than the transverse width of described blocking arm, two baffle plates (9) of postive stop baffle of partnering lay respectively at the both sides of same blocking arm (5), for limiting the direction of its rise, described two baffle plates (9) are fixed on the wobble gear corresponding with this blocking arm (10), in the time that drive unit drives driven wheel (12) to rotate, driven wheel (12) drives two wobble gears (10) that engage with it to rotate simultaneously, each wobble gear (10) drives a pair of baffle plate being fixedly connected with it to swing certain angle, and then realize and limit the rise direction that is arranged in this blocking arm to baffle plate.
2. volleyball smash exercise equipment according to claim 1, is characterized in that, the number of described blocking arm (5) is two or four.
3. volleyball smash exercise equipment according to claim 1, it is characterized in that, in described blocking arm fixture (4), be also provided with lowering or hoisting gear and lifting driver element, described control device sends elevating control signal to lifting driver element, and this lifting driver element is used for driving lowering or hoisting gear to drive blocking arm to do lifting action.
4. volleyball smash exercise equipment according to claim 1, is characterized in that, described blocking arm fixture (4) is multiple blocking arm fixed cell compositions, and each blocking arm fixed cell is used for fixing one or two blocking arms (5).
5. volleyball smash exercise equipment according to claim 4, it is characterized in that, in every blocking arm fixed cell, be provided with lowering or hoisting gear and lifting driver element, described control device sends elevating control signal to lifting driver element, and this lifting driver element is used for driving lowering or hoisting gear to drive blocking arm to do lifting action.
6. according to the volleyball smash exercise equipment described in claim 1 to 5 any one claim, it is characterized in that, this equipment also comprises wireless signal receiving circuit and remote control circuit, remote control circuit comprises that wireless signal transtation mission circuit and control signal produce circuit, described control signal produces circuit and produces control signal and send to wireless signal transtation mission circuit, this wireless signal transtation mission circuit sends to wireless signal receiving circuit by transmission of wireless signals mode by described control signal, and the control signal receiving is sent to control device by described wireless signal receiving circuit.
7. according to the volleyball smash exercise equipment described in claim 1 to 5 any one claim, it is characterized in that, this equipment also comprises infrared signal receiving circuit and remote control circuit, remote control circuit comprises that infrared signal transtation mission circuit and control signal produce circuit, described control signal produces circuit and produces control signal and send to infrared signal transtation mission circuit, this infrared signal transtation mission circuit sends to infrared signal receiving circuit by infrared signal transmission mode by described control signal, and the control signal receiving is sent to control device by described infrared signal receiving circuit.
8. according to the volleyball smash exercise equipment described in claim 1 to 5 any one claim, it is characterized in that, described equipment also comprises switching mat (8), and described switching mat (8) transmit button signal is to control device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210270550.6A CN102764498B (en) | 2012-07-31 | 2012-07-31 | Volleyball smash training equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210270550.6A CN102764498B (en) | 2012-07-31 | 2012-07-31 | Volleyball smash training equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102764498A CN102764498A (en) | 2012-11-07 |
| CN102764498B true CN102764498B (en) | 2014-12-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210270550.6A Expired - Fee Related CN102764498B (en) | 2012-07-31 | 2012-07-31 | Volleyball smash training equipment |
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| CN (1) | CN102764498B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103585746B (en) * | 2013-11-12 | 2015-09-30 | 哈尔滨工程大学 | Trainer is detected in removable vollyball pick-up point |
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| US5692978A (en) * | 1996-08-05 | 1997-12-02 | Hummel; Larry | Volleyball block back device |
| CN2455299Y (en) * | 2000-12-06 | 2001-10-24 | 马宗利 | Simple station wall for football training |
| CN2930799Y (en) * | 2007-01-12 | 2007-08-08 | 西安体育学院 | Electrodynamical analogy dynamic football human-wall training device |
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| CN201701712U (en) * | 2010-03-23 | 2011-01-12 | 葛涛 | Volleyball spiking technique assisting trainer |
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| CN102512971A (en) * | 2011-12-09 | 2012-06-27 | 苏州有色金属研究院有限公司 | Method for preparing composite flat ultrafiltration membrane |
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| CN202802692U (en) * | 2012-07-31 | 2013-03-20 | 哈尔滨师范大学 | Volleyball smash training equipment |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57131463A (en) * | 1981-02-06 | 1982-08-14 | Yoshida Kogyo Kk | Volleyball exercising tool |
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2012
- 2012-07-31 CN CN201210270550.6A patent/CN102764498B/en not_active Expired - Fee Related
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|---|---|---|---|---|
| US5692978A (en) * | 1996-08-05 | 1997-12-02 | Hummel; Larry | Volleyball block back device |
| CN2455299Y (en) * | 2000-12-06 | 2001-10-24 | 马宗利 | Simple station wall for football training |
| CN2930799Y (en) * | 2007-01-12 | 2007-08-08 | 西安体育学院 | Electrodynamical analogy dynamic football human-wall training device |
| WO2010016814A1 (en) * | 2008-08-04 | 2010-02-11 | Crook Robert E Ii | The ultimate defender |
| CN201701712U (en) * | 2010-03-23 | 2011-01-12 | 葛涛 | Volleyball spiking technique assisting trainer |
| CN102008810A (en) * | 2010-12-03 | 2011-04-13 | 哈尔滨师范大学 | Movable volleyball training table |
| CN202336194U (en) * | 2011-10-08 | 2012-07-18 | 李维纶 | Automatic intelligent badminton training system device |
| CN102512971A (en) * | 2011-12-09 | 2012-06-27 | 苏州有色金属研究院有限公司 | Method for preparing composite flat ultrafiltration membrane |
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