CN103657040B - A kind of laser type shot core stable strength building and information feedback supervising device - Google Patents
A kind of laser type shot core stable strength building and information feedback supervising device Download PDFInfo
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- CN103657040B CN103657040B CN201310742966.8A CN201310742966A CN103657040B CN 103657040 B CN103657040 B CN 103657040B CN 201310742966 A CN201310742966 A CN 201310742966A CN 103657040 B CN103657040 B CN 103657040B
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- 238000012549 training Methods 0.000 claims abstract description 34
- 230000007246 mechanism Effects 0.000 claims abstract description 29
- 238000012544 monitoring process Methods 0.000 claims description 25
- 230000001133 acceleration Effects 0.000 claims description 20
- 229910000831 Steel Inorganic materials 0.000 claims description 12
- 238000004891 communication Methods 0.000 claims description 12
- 239000010959 steel Substances 0.000 claims description 12
- 230000003750 conditioning effect Effects 0.000 claims description 11
- 239000000203 mixture Substances 0.000 claims description 11
- 210000002683 foot Anatomy 0.000 claims description 8
- 230000003028 elevating effect Effects 0.000 claims description 7
- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000011002 quantification Methods 0.000 abstract description 4
- 238000012806 monitoring device Methods 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 3
- 210000001624 hip Anatomy 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 210000003205 muscle Anatomy 0.000 description 3
- 238000013459 approach Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 210000004394 hip joint Anatomy 0.000 description 2
- 210000003141 lower extremity Anatomy 0.000 description 2
- 210000004197 pelvis Anatomy 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 210000001015 abdomen Anatomy 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 230000000386 athletic effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 210000003414 extremity Anatomy 0.000 description 1
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- 230000002452 interceptive effect Effects 0.000 description 1
- 235000013372 meat Nutrition 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 210000001364 upper extremity Anatomy 0.000 description 1
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Abstract
A kind of laser type shot core stable strength building and information feedback supervising device, it relates to a kind of shot training and information feedback supervising device, is specifically related to a kind of laser type shot core stable strength building and information feedback supervising device. The present invention does not also have the problem in conjunction with core stable strength building and the quantification monitoring device of shot final force at present in order to solve. The present invention includes lifting assembly, dial, turning cylinder, slide rail, sliding sleeve, connector, shot, pressure sensor, laser velocimeter and the balance training mechanism with information feedback function, described lifting assembly is arranged in the described balance training mechanism with information feedback function, dial is arranged on the upper end of described lifting assembly by turning cylinder, slide rail is arranged on turning cylinder, sliding sleeve is sleeved on slide rail, shot is connected with sliding sleeve by connector, pressure sensor is arranged on shot, and laser velocimeter is fixedly mounted on the front end of slide rail. The present invention stablizes strength building for shot.
Description
Technical field
The present invention relates to a kind of shot training and information feedback supervising device, be specifically related to a kind of laser type shot core stable strength building and information feedback supervising device.
Background technology
The core position of human body is the entirety being formed by waist, pelvis, hip joint, is the intermediate link of human body. Core stability makes human body set up fulcrum by the having an effect of limb muscle that stabilize at core position at the volley, for the transmission of upper and lower extremities strength creates conditions, is the stable and mobile body gesture that strength is provided of center of gravity. The strength of formation or raising core stability is force at the core. What force at the core training and traditional waist abdomen strength building maximum were different is, force at the core is trained in a lot of situations and is carried out under instability condition, can make the particularly periarticular auxiliary flesh participation motion of more small muscle group, cultivate the ability that sportsman stablizes at the volley joint and controls center of gravity, the posture of core muscles training is determined by the action of regulation game. Modern high-level specific strength training is to use the strengthening exercise means that approach special action, utilize Athletes information to monitor player motion technical process, but, in conjunction with core stable strength building and the information feedback supervising device of shot final force, also do not occur both at home and abroad.
Summary of the invention
The present invention solves at present also not feed back the problem of supervising device in conjunction with core stable strength building and the information of shot final force, and then proposes a kind of laser type shot core stable strength building and information feedback supervising device.
The present invention addresses the above problem the technical scheme of taking to be: the present invention includes lifting assembly, dial, turning cylinder, slide rail, sliding sleeve, connector, shot, pressure sensor, laser velocimeter and with the balance training mechanism of information feedback function, described lifting assembly is arranged in the described balance training mechanism with information feedback function, dial is arranged on the upper end of described lifting assembly by turning cylinder, slide rail is arranged on turning cylinder, and slide rail can turning cylinder be axis rotation, sliding sleeve is sleeved on slide rail, shot is connected with sliding sleeve by connector, pressure sensor is arranged on shot, laser velocimeter is fixedly mounted on the front end of slide rail.
The invention has the beneficial effects as follows: when the present invention uses, sportsman overcomes labile state and keeps correct firmly posture, the meat fiber that need to coordinate transfer to raise activation more core position by waist, pelvis, hip joint and lower limb participates in stablizing having an effect of balance and action, the speed of laser velocimeter test exercise, pressure sensor shows rate curve firmly, to the effectively monitoring in real time of whole Motion Technology process, the present invention is effective laser type shot core stable strength building and information feedback device.
Brief description of the drawings
Fig. 1 is overall structure schematic diagram of the present invention, Fig. 2 is the top view with the balance training mechanism of information feedback function, Fig. 3 is the upward view of Fig. 2, Fig. 4 be in Fig. 5 B-B to cutaway view, Fig. 5 is the top view with the balance training mechanism of information feedback function in detailed description of the invention five, Fig. 6 is the upward view of Fig. 5, Fig. 7 is the balance training mechanism control principle drawing with information feedback function, Fig. 8 is in the time that the signal of acceleration transducer output is voltage signal, a kind of principle schematic of Monitoring and Controlling circuit.
Detailed description of the invention
Detailed description of the invention one: present embodiment is described in conjunction with Fig. 1, described in present embodiment, a kind of laser type shot core stable strength building and information feedback supervising device comprise lifting assembly, dial 1, turning cylinder 2, slide rail 3, sliding sleeve 4, connector 5, shot 6, pressure sensor 21, laser velocimeter 22 and with the balance training mechanism of information feedback function, described lifting assembly is arranged in the described balance training mechanism with information feedback function, dial 1 is arranged on the upper end of described lifting assembly by turning cylinder 2, slide rail 3 is arranged on turning cylinder 2, and slide rail 3 can turning cylinder 2 be axis rotation, sliding sleeve 4 is sleeved on slide rail 3, shot 6 is connected with sliding sleeve 4 by connector 5, pressure sensor 21 is arranged on shot 6, laser velocimeter 22 is fixedly mounted on the front end of slide rail 3.
The grip of pressure sensor 21 hand when measuring sportsman's final force in present embodiment, and convert it into quantitative information and show. The translational speed of the laser velocimeter 22 of present embodiment shot 6 when measuring sportsman's final force, and its quantification is shown.
Detailed description of the invention two: present embodiment is described in conjunction with Fig. 1, described in present embodiment, the lifting assembly of a kind of laser type shot core stable strength building and information feedback supervising device comprises cylindrical sleeves 7, elevating lever 8 and bolt 9, cylindrical sleeves 7 vertically arranges, the lower end of elevating lever 8 is inserted in the upper end of cylindrical sleeves 7, the upper end of elevating lever 8 is connected with turning cylinder 2, bolt 9 is inserted on the lateral wall of cylindrical sleeves 7, and the positioning end of bolt 9 contacts with the lateral wall of elevating lever 8 through the lateral wall of cylindrical sleeves 7. Other composition and annexation are identical with detailed description of the invention one.
Detailed description of the invention three: present embodiment is described in conjunction with Fig. 1, described in present embodiment, the lower end of the cylindrical sleeves 7 of a kind of laser type shot core stable strength building and information feedback supervising device is provided with vibrator 10, and vibrator 10 is connected with the signal output part of the described balance training mechanism with information feedback function. Other composition and annexation are identical with detailed description of the invention one or two.
Detailed description of the invention four: present embodiment is described in conjunction with Fig. 1, Fig. 2, Fig. 3, Fig. 6 and Fig. 7, described in present embodiment, the balance training mechanism with information feedback function of a kind of laser type shot core stable strength building and information feedback supervising device comprises training station and Monitoring and Controlling circuit 19, and described training station comprises frame-type base, balancer 17, acceleration transducer 18 and four supporting mechanisms; Described frame-type base is made up of two pairs of strip steel plates 12 and four feets 11, described two pairs of orthogonal frame structures of strip steel plate 12, below four angles of described rectangular frame structure, be respectively arranged with a feet 11, the outside at four angles of described rectangular frame structure is provided with a supporting mechanism; Each supporting mechanism is made up of a U-shaped spring bracing 14 and a spring, and a sidewall of described U-shaped spring bracing is fixedly connected with rectangular frame, and the inner side of another sidewall 15 of described U-shaped spring bracing is fixedly connected with one end of spring 16; The shape of balancer 17 is identical with the shape of rectangular frame structure, the outside at balancer 17 each angles all arranges a fixed block 13, four fixed blocks 13 of described balancer 17 are fixedly connected with the other end of the spring 16 of four supporting mechanisms respectively, make balancer 17 be suspended in frame-type base directly over; Acceleration transducer 18 is fixed on the center of balancer 17 bottom surfaces; Monitoring and Controlling circuit 19 comprises signal conditioning circuit 92 and voltage driving display 93, the signal output part of acceleration transducer 18 connects the signal input part of signal conditioning circuit 92, and the signal output part of signal conditioning circuit 92 connects the signal input part of voltage driving display 93; The spring 16 center that is positioned at two supporting mechanisms at balancer 17 diagonal angles connects and the 17 diagonal coincidences of corresponding balancer. Other composition and annexation are identical with detailed description of the invention three.
Detailed description of the invention five: present embodiment is described in conjunction with Fig. 1, Fig. 4, Fig. 5, Fig. 6 and Fig. 7, described in present embodiment, the balance training mechanism with information feedback function of a kind of laser type shot core stable strength building and information feedback supervising device comprises training station and Monitoring and Controlling circuit 19, and described training station comprises frame-type base, balancer 17, acceleration transducer 18 and four pairs of supporting mechanisms; Described frame-type base is made up of two pairs of channel-section steels and four feets 11, described two pairs of channel-section steels composition rectangular frame structure, below four angles of described rectangular frame structure, be respectively arranged with a feet, the two ends of every channel-section steel are provided with a U-shaped spring bracing 14, and the opening that is positioned at two U-shaped spring bracings at same channel-section steel two ends is oppositely arranged, the downside of each U-shaped spring bracing upper beam is all fixed with a spring 16; The shape of balancer is identical with the shape of rectangular frame structure, the both sides at the each right angle of balancer arrange respectively a fixed block 13, described two fixed blocks 13 vertical setting mutually, the bottom of each spring 16 is all fixedly connected with a fixed block 13, make balancer 17 be suspended in frame-type base above; Acceleration transducer 18 is fixed on the center of balancer 17 bottom surfaces; Monitoring and Controlling circuit 19 comprises signal conditioning circuit 92 and voltage driving display 93, the signal output part of acceleration transducer 18 connects the signal input part of signal conditioning circuit 92, and the signal output part of signal conditioning circuit 92 connects the signal input part of voltage driving display 93.
Detailed description of the invention six: in conjunction with Fig. 1, Fig. 6 and Fig. 7, present embodiment is described, the signal that the acceleration transducer 18 of a kind of laser type shot core stable strength building and information feedback supervising device is exported described in present embodiment is voltage signal. Other composition and annexation are identical with detailed description of the invention four or five.
Detailed description of the invention seven: in conjunction with Fig. 1, Fig. 6 or Fig. 7, present embodiment is described, the frequency of the acceleration transducer 18 of a kind of laser type shot core stable strength building and information feedback supervising device is 0.5-5Hz described in present embodiment. Other composition and annexation are identical with detailed description of the invention four or five.
Detailed description of the invention eight: present embodiment is described in conjunction with Fig. 1, Fig. 6 or Fig. 7, described in present embodiment, the Monitoring and Controlling circuit 19 of a kind of laser type shot core stable strength building and information feedback supervising device also comprises zeroing circuit 91, and the signal output part of described zeroing circuit 91 connects the zeroing signal input part of signal conditioning circuit 92. Other composition and annexation are identical with detailed description of the invention four or five.
Detailed description of the invention nine: present embodiment is described in conjunction with Fig. 1, Fig. 6 or Fig. 7, described in present embodiment, the Monitoring and Controlling circuit 19 of a kind of laser type shot core stable strength building and information feedback supervising device also comprises AD converter 95 and communication drive circuit 94, the input end of analog signal of AD converter 95 connects the signal output part of signal conditioning circuit 95, and the digital signal output end of this AD converter 95 connects the signal input part of communication drive circuit 94. Other composition and annexation and detailed description of the invention four or identical.
Detailed description of the invention ten: in conjunction with Fig. 1, Fig. 6 or Fig. 7, present embodiment is described, the communication drive circuit 94 of a kind of laser type shot core stable strength building and information feedback supervising device is wire communication circuit or radio communication circuit described in present embodiment. Other composition and annexation are identical with detailed description of the invention nine.
Operation principle
While carrying out laser type shot core stable strength building and information feedback monitoring exercise, in the balance training mechanism with information feedback function under sportsman stands in and plays pendulum, and in conjunction with the vibrator 10 that approaches shot specific strength feature through optimal design, grasp shot 6, carry out final force training, the speed of laser velocimeter test exercise, now balance training mechanism starts working with the device of information feedback function, measure balanced controls amplitude of fluctuation all around, the quantification treatment of the information of carrying out, and convert to accordingly the signal of telecommunication be connected with vibrator 10 produce interactive (along with the raising of sportsman's balanced capacity, balanced controls tend to be steady in the time that sportsman practises, now balanced controls send signal of telecommunication Vibration on Start-up device 10, vibrator 10 is produced to be swung, to increase new exercise difficulty). the athletic stable state of balance training mechanism quantification monitoring, pressure sensor shows rate curve firmly, and then to the effectively monitoring in real time of whole Motion Technology process.
Claims (9)
1. laser type shot core stable strength building and an information feedback supervising device, described a kind of laser type shot coreStablize strength building and information feedback supervising device comprise lifting assembly, dial (1), turning cylinder (2), slide rail (3),Sliding sleeve (4), connector (5), shot (6), pressure sensor (21), laser velocimeter (22) and feed back with informationThe balance training mechanism of function, described lifting assembly is arranged in the described balance training mechanism with information feedback function, carvesScale (1) is arranged on the upper end of described lifting assembly by turning cylinder (2), it is upper that slide rail (3) is arranged on turning cylinder (2),And slide rail (3) can turning cylinder (2) be axis rotation, and it is upper that sliding sleeve (4) is sleeved on slide rail (3), and shot (6) passes throughConnector (5) is connected with sliding sleeve (4), and it is upper that pressure sensor (21) is arranged on shot (6), laser velocimeter (22)Be fixedly mounted on the front end of slide rail (3), described lifting assembly comprises cylindrical sleeves (7), elevating lever (8) and bolt(9), cylindrical sleeves (7) vertically arranges, and the lower end of elevating lever (8) is inserted in the upper end of cylindrical sleeves (7), liftingThe upper end of bar (8) is connected with turning cylinder (2), and bolt (9) is inserted on the lateral wall of cylindrical sleeves (7), andThe positioning end of bolt (9) contacts with the lateral wall of elevating lever (8) through the lateral wall of cylindrical sleeves (7).
2. a kind of laser type shot core stable strength building and information are fed back supervising device, its spy according to claim 1Levy and be: the lower end of cylindrical sleeves (7) is provided with vibrator (10), vibrator (10) is with described with information feedback functionBalance training mechanism signal output part connect.
3. a kind of laser type shot core stable strength building and information are fed back supervising device, its spy according to claim 2Levy and be: the described balance training mechanism with information feedback function comprises training station, display (20) and detects and control electricityRoad (19), described training station comprises frame-type base, balancer (17), acceleration transducer (18) and four support machinesStructure; Described frame-type base is made up of two pairs of strip steel plates (12) and four feets (11), described two pairs of stripsThe orthogonal frame structure of steel plate (12), is respectively arranged with a feet (11) below four angles of described rectangular frame structure,The outside at four angles of described rectangular frame structure is provided with a supporting mechanism; Each supporting mechanism is by a U-shaped springBracing frame (14) and a spring composition, a sidewall of described U-shaped spring bracing is fixedly connected with rectangular frame, instituteThe inner side of stating another sidewall (15) of U-shaped spring bracing is fixedly connected with one end of spring (16); Balancer (17)Shape identical with the shape of rectangular frame structure, the outside at the each angle of balancer (17) all arranges a fixed block (13),Four fixed blocks (13) of described balancer (17) respectively with fixing company of the other end of the spring (16) of four supporting mechanismsConnect, make balancer (17) be suspended in frame-type base directly over; Acceleration transducer (18) is fixed on balancer (17)The center of bottom surface; The signal output part of acceleration transducer (18) connects the swinging signal of Monitoring and Controlling circuit (19)Input, the display output of described Monitoring and Controlling circuit (19) connects the display input of display (20);In described Monitoring and Controlling circuit (19), embed and have monitoring module, described monitoring module to comprise as lower unit:
Be used for the unit of the signal that gathers acceleration transducer (18) transmission;
For showing data according to gathering the signal acquisition obtaining, then send these demonstration data driving display (20) aobviousShow unit; Be positioned at the line of centres and corresponding balancer of the spring (16) of two supporting mechanisms at balancer (17) diagonal angle(17) diagonal overlaps.
4. a kind of laser type shot core stable strength building and information are fed back supervising device, its spy according to claim 2Levy and be: the described balance training mechanism with information feedback function comprises training station, display (20) and Monitoring and Controlling electricityRoad (19), described training station comprises frame-type base, balancer (17), acceleration transducer (18) and four pairs of support machinesStructure; Described frame-type base is made up of two pairs of channel-section steels and four feets (11), described two pairs of channel-section steels composition rectangular frame knotStructure, is respectively arranged with a feet below four angles of described rectangular frame structure, and the two ends of every channel-section steel are provided withA U-shaped spring bracing (14), and be positioned at the phase of opening of two U-shaped spring bracings at same channel-section steel two endsTo arranging, the downside of each U-shaped spring bracing upper beam is all fixed with a spring (16); The shape of balancer withThe shape of rectangular frame structure is identical, and the both sides at the each right angle of balancer arrange respectively a fixed block (13), consolidates for described twoDetermine piece (13) vertical setting mutually, a bottom homogeneous fixed block (13) of each spring (16) is fixedly connected with, and makes to put downHeng Tai (17) be suspended in frame-type base above; Acceleration transducer (18) be fixed on balancer (17) bottom surface inHeart position; The signal output part of acceleration transducer (18) connects the swinging signal input of Monitoring and Controlling circuit (19),The display output of described Monitoring and Controlling circuit (19) connects the display input of display (20); Described prisonSurvey in control circuit (19) and embed and have monitoring module, described monitoring module to comprise as lower unit:
Be used for the unit of the signal that gathers acceleration transducer (18) transmission;
For showing data according to gathering the signal acquisition obtaining, then send these demonstration data driving display (20) aobviousThe unit showing.
5. feed back supervising device according to a kind of laser type shot core stable strength building described in claim 3 or 4 and information,It is characterized in that: the signal of described acceleration transducer (18) output is voltage signal, described Monitoring and Controlling circuit (19)Comprise modulate circuit (92), A/D converter (93) and single chip circuit (94), the signal of acceleration transducer (18)Output connects the signal input part of signal conditioning circuit (92), and the signal output part of signal conditioning circuit (92) connects A/DThe input end of analog signal of converter (93), the digital signal output end of this A/D converter (93) connects single chip circuit(94) signal input part, the display output of described single chip circuit (94) connects the demonstration of display (20)Signal input part.
6. feed back supervising device according to a kind of laser type shot core stable strength building described in claim 3 or 4 and information,It is characterized in that: the frequency of described acceleration transducer (18) is 0.5-5Hz.
7. feed back supervising device according to a kind of laser type shot core stable strength building described in claim 3 or 4 and information,It is characterized in that: described Monitoring and Controlling circuit (19) also comprises zeroing circuit (91) signal of described zeroing circuit (91)Output connects the zeroing signal input part of signal conditioning circuit (92).
8. feed back supervising device according to a kind of laser type shot core stable strength building described in claim 3 or 4 and information,It is characterized in that: described Monitoring and Controlling circuit (19) also comprises communication drive circuit (95) string of single chip circuit (94)Serial Communication FPDP is connected with the serial data port of communication drive circuit (95), and described control module is embedded in single-chip microcomputerIn circuit (94), described monitoring module also comprises: will show that data send to the unit of communication drive circuit (95).
9. a kind of laser type shot core stable strength building and information are fed back supervising device, its spy according to claim 8Levy and be: described communication drive circuit (95) is wire communication circuit or radio communication circuit.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310742966.8A CN103657040B (en) | 2013-12-30 | 2013-12-30 | A kind of laser type shot core stable strength building and information feedback supervising device |
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| CN201310742966.8A CN103657040B (en) | 2013-12-30 | 2013-12-30 | A kind of laser type shot core stable strength building and information feedback supervising device |
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| CN103657040A CN103657040A (en) | 2014-03-26 |
| CN103657040B true CN103657040B (en) | 2016-05-25 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104492046B (en) * | 2014-12-30 | 2017-02-22 | 哈尔滨商业大学 | Laser type super-equal-length shot instrument vibration training and information storage monitoring device |
| CN104492048B (en) * | 2014-12-30 | 2017-02-01 | 哈尔滨商业大学 | Laser type shot instrument vibration training and information storage monitoring device |
| CN104606864B (en) * | 2014-12-30 | 2017-01-25 | 哈尔滨商业大学 | Laser type weight throw instrument vibration core strength training and information feedback training device |
| CN109331438B (en) * | 2018-12-03 | 2024-04-26 | 南京安锐普信息科技有限公司 | Shot in-situ throwing technology simulator |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DD233305A1 (en) * | 1984-12-28 | 1986-02-26 | Koerperkultur Sport Forsch | TRAINING AND TEST UNIT FOR CYCLING AND SHOOTING MOVEMENTS |
| CN201643612U (en) * | 2010-03-22 | 2010-11-24 | 武继国 | Shot simulation training device |
| CN201906443U (en) * | 2010-12-27 | 2011-07-27 | 哈尔滨师范大学 | Vibratory equilong multi-angle shot put specialized strength training and monitoring device |
| CN203303610U (en) * | 2013-06-27 | 2013-11-27 | 哈尔滨师范大学 | Vibrating super-equal-length shot put special-strength trainer |
| CN203315704U (en) * | 2013-06-27 | 2013-12-04 | 哈尔滨师范大学 | Photoelectric vibrating shot trainer |
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2013
- 2013-12-30 CN CN201310742966.8A patent/CN103657040B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DD233305A1 (en) * | 1984-12-28 | 1986-02-26 | Koerperkultur Sport Forsch | TRAINING AND TEST UNIT FOR CYCLING AND SHOOTING MOVEMENTS |
| CN201643612U (en) * | 2010-03-22 | 2010-11-24 | 武继国 | Shot simulation training device |
| CN201906443U (en) * | 2010-12-27 | 2011-07-27 | 哈尔滨师范大学 | Vibratory equilong multi-angle shot put specialized strength training and monitoring device |
| CN203303610U (en) * | 2013-06-27 | 2013-11-27 | 哈尔滨师范大学 | Vibrating super-equal-length shot put special-strength trainer |
| CN203315704U (en) * | 2013-06-27 | 2013-12-04 | 哈尔滨师范大学 | Photoelectric vibrating shot trainer |
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