CN102805917B - Tennis racket bounce angle tester - Google Patents
Tennis racket bounce angle tester Download PDFInfo
- Publication number
- CN102805917B CN102805917B CN201210283658.9A CN201210283658A CN102805917B CN 102805917 B CN102805917 B CN 102805917B CN 201210283658 A CN201210283658 A CN 201210283658A CN 102805917 B CN102805917 B CN 102805917B
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- China
- Prior art keywords
- tennis racket
- jump bit
- striker
- angle
- minute hand
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Abstract
The invention provides a tennis racket bounce angle tester, and relates to the field of testing for sports instruments. The tennis racket bounce angle tester comprises a base, a left clamping plate, a right clamping plate, a hand wheel, a vertical post, a sleeve, a handle, a protractor, a pointer, a T-shaped striker and an impact hammer. By the tennis racket bounce angle tester, the important index, namely the tennis racket bounce angle value, which is used for evaluating motor functionality of tennis rackets, can be acquired visually and accurately, the actual problem that tested data of tennis racket bounce angles are inaccurate due to absence of special instruments at present is solved, and the process of testing a tennis racket bounce angle according to standards of Tennis Racket QB/T2769-2006 is optimized. The tennis racket bounce angle tester is high in structural stability, easy and convenient to operate and accurate in test results.
Description
Technical field
The present invention relates to sports equipment detecting instrument, relate in particular to a kind of can be intuitively, the instrument of Measurement accuracy tennis racket angle of rebound value.
Background technology
When detecting tennis racket angle of rebound according to QB/T 2769-2006 < < tennis racket > >, inspector was fixed on tennis racket on support according to schematic diagram in standard conventionally in the past, with the pellet impact of swinging one's arm, clap string face, by the swing one's arm angle of rebound of ball of observation, obtain this index.It is different at the judgement maximum angle of rebound of ball of swinging one's arm that this process shortcoming is different inspector, thereby cause testing result dispersiveness larger, and angle of rebound is difficult to accurate acquisition.Tennis racket angle of rebound value is one of important indicator of evaluating tennis racket quality, and its large young pathbreaker directly affects the sporting functionality of tennis racket.Therefore, the uncertain factor while reduce detecting tennis racket angle of rebound value, become assessment tennis racket functional one important and urgent task is particularly important according to actual detection case design specialized instrument.
Summary of the invention
The present invention is directed to the problem existing while in the past detecting tennis racket angle of rebound according to QB/T 2769-2006 < < tennis racket > >, provide a kind of can be intuitively, the instrument of accurate recording tennis racket angle of rebound value, solved the inaccurate shortcoming of data while in the past measuring tennis racket angle of rebound value without special equipment.
In order to solve problem in prior art, the invention provides a kind of tennis racket angle of rebound tester, it comprises protractor, striker, jump bit, column, base, column is vertically set on base, base is provided with tennis racket clamping plate, jump bit, striker and protractor are successively set on column by vertical order, and protractor place plane is parallel with column;
Jump bit comprises jump bit cantilever, described jump bit cantilever is parallel with column when freedom is sagging, and jump bit cantilever is vertical with protractor base, and protractor is fixed on sleeve, striker and jump bit are set in rotating shaft, and striker and jump bit can be around its sheathed rotating shaft rotations;
Jump bit cantilever is provided with wedge shape projection near a side of striker, and the acute angle of wedge shape projection direction when with the free bottom of jump bit is identical;
Striker comprises the second minute hand for reading, also comprises that described the second minute hand is vertical with described the 3rd minute hand for driving the 3rd minute hand of striker rotation; When jump bit freedom is sagging, its wedge shape projection is less than the needle point of the 3rd minute hand to the distance of the sheathed rotating shaft of jump bit to the distance of the sheathed rotating shaft of jump bit.
As a further improvement on the present invention, described striker also comprises the first minute hand, and described the first minute hand and the second minute hand, on same straight line, arrange in opposite direction.
As a further improvement on the present invention, described the first minute hand is identical with the second minute hand shape, size and material.
As a further improvement on the present invention, also comprise pointer, described pointer is fixedly installed on the top of jump bit cantilever, with jump bit cantilever at an angle of 90.
As a further improvement on the present invention, tennis racket clamping plate comprise right clamping plate and left clamping plate, and the distance between right clamping plate and left clamping plate is adjusted by handwheel.
As a further improvement on the present invention, also comprise sleeve and hand lever, sleeve is arranged on column, and the upper-lower position of sleeve on column adjusted by hand lever, and protractor is fixed on sleeve, and rotating shaft and sleeve that striker and jump bit are sheathed are fixed.
As a further improvement on the present invention, the spherical diameter of jump bit is 50mm, quality 640g, and the distance of the symmetric points of the sphere axle center distance measurements hornwork of jump bit is 400mm.
As a further improvement on the present invention, four jiaos of base have four screws, by expansion bolt, base are fixed on to ground.
As a further improvement on the present invention, column lower end and base are fixed by bolt.
As a further improvement on the present invention, three of striker minute hands are formed by a good stalloy cutting of elasticity.
The present invention can intuitively, accurately obtain the important indicator of this evaluation tennis racket sporting functionality of tennis racket angle of rebound value.
The invention solves the inaccurate practical problem of data while in the past measuring tennis racket angle of rebound without special equipment, optimized the measuring process that detects tennis racket angle of rebound according to QB/T 2769-2006 < < tennis racket > >.Structural stability of the present invention is good, easy and simple to handle, and test result is accurate.
Owing to having adopted said structure, the present invention has following distinguishing feature and advantage:
(1) field trial shows, can record intuitively, exactly the angle of rebound value of tennis racket;
(2) angle of rebound measurement category: 0 ° ~ 90 °, precision ± 1 °;
(3) structural stability is good, easy and simple to handle, uses the process of testing product of the present invention to meet relevant criterion requirement.
Accompanying drawing explanation
Fig. 1 is tennis racket angle of rebound tester structural representation of the present invention;
Fig. 2 is tennis racket angle of rebound tester part-structure enlarged drawing of the present invention;
Fig. 3 is tennis racket angle of rebound tester jump bit cantilever of the present invention place's side view (from the right side of Fig. 2);
Fig. 4 is tennis racket angle of rebound tester jump bit cantilever of the present invention place top view;
Fig. 5 is the T-shaped striker structure schematic diagram of tennis racket angle of rebound tester of the present invention.
In figure, each component names is as follows:
Protractor 1, T-shaped striker 2, pointer 3, jump bit 4, column 5, handwheel 6, right clamping plate 7, left clamping plate 8, base 9, sleeve 10, hand lever 11, connecting hole 12, wedge shape projection 13, jump bit cantilever 14, T-shaped striker the first minute hand 100, T-shaped striker the second minute hand 200, T-shaped striker the 3rd minute hand 300.
The specific embodiment
Below in conjunction with the drawings and the specific embodiments, the present invention will be further described.
As shown in Figure 1, tennis racket angle of rebound tester comprises with lower member: protractor 1, T-shaped striker 2, pointer 3, jump bit 4, column 5, handwheel 6, right clamping plate 7, left clamping plate 8, base 9, sleeve 10 and hand lever 11.According to QB/T 2769-2006 < < tennis racket > > requirement, the spherical diameter of jump bit 4 is 50mm, quality 640g, and the distance of the symmetric points of the sphere axle center distance measurements hornwork 1 of jump bit 4 is 400mm.Four jiaos of base 9 have four screws, by expansion bolt, the present invention are fixed on to ground, make it have good stability.Column 5 lower ends and base 9 are fixed by bolt.Pointer 3, jump bit 4, T-shaped striker 2 and protractor 1 are bolted successively in sleeve 10.Sleeve 10 can slide up and down along column 5, can fixed muffle 10 positions by adjusting hand lever 11.
Tennis racket to be measured is inserted in to the hole of 8, right clamping plate 7 and left clamping plate, according to the height of length adjustment jump bit 4 of tennis racket and the clip position of tennis racket, make jump bit 4 freely vertical its sphere centre and tennis face center superposition when sagging, then lock the position of hand lever 11 fixed punch hammers 4, rotation hand wheel 6 is fixed tennis racket in handle place.According to relevant criterion requirement, jump bit 4 is risen to and makes it freely swing after specified altitude and clash into tennis face central authorities.During jump bit 4 bounce-back, will draw T-shaped striker 2, pointer 3 with jump bit 4 cantilever cooperative motions to maximum angle, throughput hornwork 1 and T-shaped striker 2 can record the angle of rebound value of tennis racket.
Design can be recorded the parts of jump bit angle of rebound---and pointer, T-shaped striker, protractor and the wedge shape being welded on cantilever are protruding.3 minute hands of T-shaped striker form (see figure 5) by a good stalloy cutting of elasticity, free to rotate when T-shaped striker is subject to External Force Acting.In the face of operator, pointer, jump bit cantilever, T-shaped striker and protractor successively front and back pass through bolts assemblies (see figure 1).Pointer is fixed on the top of jump bit cantilever by 2 Screws, and pointer and jump bit cantilever angle in 90 °.Before impact, make the second minute hand 200 of T-shaped striker point to 0 °, now straight down, the acute angle of wedge shape projection is the identical (see figure 4) of direction when with the free bottom of jump bit for the 3rd minute hand 300.Rotate jump bit cantilever and make pointer tip when 90 ° of positions of protractor, freely discharge jump bit, this process is " naturally the falling from horizontal level " described in QB/T 2769-2006 < < tennis racket > >.In the free bottom of jump bit, when the sharp edge of wedge shape projection bumps against the 3rd minute hand 300 of T-shaped striker, under effect of inertia, the 3rd minute hand 300(is shown in Fig. 5) slight perk is stuck in high spot from wedge shape projection sharp edge along convex surfaces fast slide is crossed obtuse angle edge, and then the 3rd minute hand 300 recovers initial straight shape at once.After jump bit clashes into tennis face, rebound, now wedge shape projection obtuse angle edge is identical with jump bit bounce-back direction.Because being stuck in wedge shape high spot, the 3rd minute hand 300 forms the state that striker and jump bit cantilever are synchronized with the movement, i.e. now T-shaped striker and jump bit cantilever cooperative motion.When jump bit and T-shaped striker are synchronized with the movement to maximum angle of rebound, throughput hornwork, the second minute hand 200 record the angle of rebound value of tennis racket.
For the tennis racket of different length, design parts---left clamping plate, right clamping plate, handwheel, hand lever and the sleeve of adjustable jump bit height and tennis racket clamping height, its sphere centre and tennis face center superposition while having guaranteed that jump bit is freely sagging.
Above content is in conjunction with concrete preferred embodiment further description made for the present invention, can not assert that specific embodiment of the invention is confined to these explanations.For general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.
Claims (10)
1. a tennis racket angle of rebound tester, it is characterized in that: it comprises protractor (1), striker, jump bit (4), column (5), base (9), column (5) is vertically set on base (9), base (9) is provided with tennis racket clamping plate, it is upper that jump bit (4), striker and protractor (1) are successively set on column (5) by vertical order, and protractor (1) place plane is parallel with column (5);
Jump bit (4) comprises jump bit cantilever (14), described jump bit cantilever (14) is parallel with column (5) when freedom is sagging, jump bit cantilever (14) is vertical with protractor (1) base, protractor (1) is fixing, striker and jump bit (4) are set in rotating shaft, and striker and jump bit (4) can be around its sheathed rotating shaft rotations;
Jump bit cantilever (14) is provided with wedge shape projection near a side of striker, and the acute angle of wedge shape projection direction when with the free bottom of jump bit is identical;
Striker comprises the second minute hand for reading, also comprises that described the second minute hand is vertical with described the 3rd minute hand for driving the 3rd minute hand of striker rotation; When jump bit freedom is sagging, its wedge shape projection is less than the needle point of the 3rd minute hand to the distance of the sheathed rotating shaft of jump bit to the distance of the sheathed rotating shaft of jump bit.
2. tennis racket angle of rebound tester according to claim 1, is characterized in that: described striker also comprises the first minute hand, and described the first minute hand and the second minute hand, on same straight line, arrange in opposite direction.
3. tennis racket angle of rebound tester according to claim 2, is characterized in that: described the first minute hand is identical with the second minute hand shape, size and material.
4. tennis racket angle of rebound tester according to claim 3, is characterized in that: also comprise pointer (3), described pointer (3) is fixedly installed on the top of jump bit cantilever (14), with jump bit cantilever (14) at an angle of 90.
5. tennis racket angle of rebound tester according to claim 3, is characterized in that: tennis racket clamping plate comprise right clamping plate (7) and left clamping plate (8), and the distance between right clamping plate (7) and left clamping plate (8) is adjusted by handwheel (6).
6. tennis racket angle of rebound tester according to claim 3, it is characterized in that: also comprise sleeve (10) and hand lever (11), sleeve (10) is arranged on column (5), the position of sleeve (10) on column (5) adjusted by hand lever (11), protractor (1) is fixed on sleeve (10), and the rotating shaft that striker and jump bit (4) are sheathed and sleeve (10) are fixing.
7. tennis racket angle of rebound tester according to claim 3, is characterized in that: the spherical diameter of jump bit (4) is 50mm, quality 640g, and the distance of the symmetric points of the sphere axle center distance measurements hornwork (1) of jump bit (4) is 400mm.
8. tennis racket angle of rebound tester according to claim 3, is characterized in that: four jiaos of base (9) have four screws, by expansion bolt, base (9) are fixed on to ground.
9. tennis racket angle of rebound tester according to claim 3, is characterized in that: column (5) lower end and base (9) are fixed by bolt.
10. tennis racket angle of rebound tester according to claim 3, is characterized in that: three minute hands of striker are formed by a good stalloy cutting of elasticity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210283658.9A CN102805917B (en) | 2012-08-10 | 2012-08-10 | Tennis racket bounce angle tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210283658.9A CN102805917B (en) | 2012-08-10 | 2012-08-10 | Tennis racket bounce angle tester |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102805917A CN102805917A (en) | 2012-12-05 |
| CN102805917B true CN102805917B (en) | 2014-09-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210283658.9A Expired - Fee Related CN102805917B (en) | 2012-08-10 | 2012-08-10 | Tennis racket bounce angle tester |
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| Country | Link |
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| CN (1) | CN102805917B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105536217A (en) * | 2016-02-01 | 2016-05-04 | 山东建筑大学 | Tennis racket string elastic force measuring device and method |
| CN105536218B (en) * | 2016-02-25 | 2018-02-27 | 江苏祺洋航碳纤科技有限公司 | The antifatigue slap machine of carbon badminton racket |
| CN107121052A (en) * | 2017-06-23 | 2017-09-01 | 中国大唐集团科学技术研究院有限公司华东分公司 | A kind of measurement apparatus of suspension bracket boom angle |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2916735A1 (en) * | 1979-04-25 | 1980-11-06 | Richard Hahn | Accurate tennis racquet string tension tester - has pressure plate on parallel guide with sliding weight force adjustment |
| US5390534A (en) * | 1993-05-07 | 1995-02-21 | Lisco, Inc. | Impact testing device |
| CN202221365U (en) * | 2011-07-15 | 2012-05-16 | 燕山大学 | Tester for testing elasticity of table tennis balls and table tennis rackets |
| CN202724583U (en) * | 2012-08-10 | 2013-02-13 | 深圳市计量质量检测研究院 | Rebound angle tester of tennis racket |
-
2012
- 2012-08-10 CN CN201210283658.9A patent/CN102805917B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2916735A1 (en) * | 1979-04-25 | 1980-11-06 | Richard Hahn | Accurate tennis racquet string tension tester - has pressure plate on parallel guide with sliding weight force adjustment |
| US5390534A (en) * | 1993-05-07 | 1995-02-21 | Lisco, Inc. | Impact testing device |
| CN202221365U (en) * | 2011-07-15 | 2012-05-16 | 燕山大学 | Tester for testing elasticity of table tennis balls and table tennis rackets |
| CN202724583U (en) * | 2012-08-10 | 2013-02-13 | 深圳市计量质量检测研究院 | Rebound angle tester of tennis racket |
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| Publication number | Publication date |
|---|---|
| CN102805917A (en) | 2012-12-05 |
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Granted publication date: 20140917 Termination date: 20160810 |
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| CF01 | Termination of patent right due to non-payment of annual fee |