CN201565065U

CN201565065U - Table tennis bottom plate with improved handle part

Info

Publication number: CN201565065U
Application number: CN2009202796848U
Authority: CN
Inventors: 刘勇
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-11-08
Filing date: 2009-11-08
Publication date: 2010-09-01
Anticipated expiration: 2019-11-08

Abstract

The utility model discloses a table tennis bottom plate with an improved handle part, which comprises a bat beating plate 1, a bat holding handle 2, a finger hole 3 and a projected block 6. The utility model is characterized in that the vertical distance between a top point 8 of a groove formed at the combining part of the holding handle 2 and the projected block 6 and a vertical axle line 7 of a bat ball beating region is within 2cm above the top point 8 and within 2cm below the top point 8, three fingers can simultaneously pass through the finger hole 3 under the front lower part of the holding handle 2, in addition, three fingers are completely positioned at one side of the vertical axle line 7 of the bat ball beating region, and an included angle between the vertical axle line 7 of the bat ball beating region and a connecting line from the top point 8 of the groove formed at the combining part of the holding handle 2 and the projected block 6 to a center point 9 at the top of the finger hole 3 is between 10 and 60 degrees. The structure has the advantages that when the bat is held naturally, the vertical center axle line approaches to the extension line of the forearm, the force giving is smooth, the force is strong, the wrist is free without tightness during forehand and backhand large-angle bat pressing, the front end of the forefinger can also give attention to the control of each part of the bat, and the control effect on a small ball is good. Compared with the existing straight bats and horizontal bats, the utility model conforms to the physiological curve of human bodies, and beginners can easily adapt to the table tennis bottom plate.

Description

The improved base board of table tennis bat of a kind of shank

1, technical field

The utility model relates to a kind of base board of table tennis bat, particularly relates to the improved base board of table tennis bat of a kind of lever.

2, background technology

Technical background mainly comprises three aspects, and more improved innovation technology of technology, lever of straight plate transverse slat and table tennis technology are popularized beginner's specification requirement.

The technical problem that pen-hold grip and shake-hands grip exist, advantage is respectively arranged, unvanquishable shortcoming is also respectively arranged, this mainly is because the structure of holding bat causes, pen-hold grip makes pen-hold grip have good flexibility because the finger of control angle and strength all concentrates on the batting district longitudinal central axis line of racket, feel and low-angle face variation efficiently, clap the normal physiology curvature of angle wristlock but press before the wide-angle of the froehand-backhand position of pen-hold grip, operation easier is big, often needing finger to do significantly adjusts, return to occur to adjust inaccurate problem not in place if require to adjust fast again, it is little to add the finger strength of holding bat, particularly backhand strength is very little, this all needs a large amount of training to adapt to, and finger is also had and must injure, racket batting district is below the forearm extended line when also having it to hold bat naturally, and it is far apart from extended line, it is in alignment with forearm often will painstakingly upwards to kick up wrist in batting in order to have an effect smoothly, this has also strengthened the use difficulty, the stability of big strength performance and control is all bad, with regard to trend, select the new person of pen-hold grip fewer and feweri, still because the technology rising space of pen-hold grip is limited, mainly be 3 above-mentioned shortcomings: the froehand-backhand wide-angle is pressed bat distortion physiology curvature finger will do significantly and is adjusted, the finger mode of holding bat causes strength little and racket batting district is too far away apart from the forearm extended line when holding bat naturally.

The hold of shake-hand grip is that palm is held bat, horizontal strength of holding is very big, batting is strong, but no matter be at forehand and backhand lifting the ball or square stance, in order to have an effect more smoothly and control is had an effect, we often need to force down wrist, racket head is avaled, just can get high-quality attacking driving and loop drive, study carefully its be ready since its when holding bat naturally racket batting district above the forearm extended line, and distance is far, the best position of having an effect smoothly should be on the forearm extended line, in order to reach this effect, we just form the posture that is referred to as heavy wrist, but we can see in the amateurish competitor who was not subjected to professional training, many people racket head in use kick up, a lot of people are unwilling to depress wrist, because that violates the physiology curvature of nature, can make the carpal ligaments anxiety, what need also that a large amount of training could control is good, in addition under the situation of pressing wrist, the wrist ligament is in extended state, wrist is dumb, can influence robustness and the speed that the froehand-backhand of clapping the angle is pressed bat significantly, this still needs a large amount of training to adapt to, handle structure also causes in the finger finger the most flexibly in this---and its front end of forefinger is far away apart from bat sweet district and center line of racket, feel is fuzzy relatively, bead control is also bad, this also is the main cause why interior technology of shake-hands grip platform is not so good as pen-hold grip, is that the heavy wrist of shake-hands grip is to the distortion of wrist under summing up, the dumb bat angle difficulty of pressing significantly of wrist is big under the heavy wrist situation, the forefinger front end feel far away apart from the sweet district of batting blured, and bead control is poor, and it is dumb that the forefinger leading portion is clapped shape apart from the low-angle fine setting far away of racket longitudinal central axis line.

For a long time, people also are to feel puzzled deeply for the problem of directly holding shake-hand grip, so there are a lot of innovations to occur, wherein noticeable is that a class is to the improvement of batting face with respect to the arm position, this improved purpose it is apparent that in order to solve the nature problem of wristlock physiology curvature in order to adjust this position that face batting district under the state run in the pen-hold grip below the forearm extended line and the shake-hands grip above the forearm extended line of holding bat, for example: zl200420047683.8 zl98205697.4, all the position of batting face is adjusted on the forearm extended line, but in practicality, but can't well use, its reason has 3 points, at first, though pen-hold grip and shake-hands grip all have the shortcoming of self, do not have can not be by the have an effect defective of principle of the violation that training overcomes but can both accomplish substantially to use, but part is improved the racket of lever, a lot of basic principles of control and originating party have but been violated, can't remedy by training in causing using, most critical is in these problems: the Control Shaft that the angle is clapped in application of force axle that racket is main and adjustment departs from racket batting district longitudinal central axis line greatly, cause having an effect wandering off and lose control during racket brandished, next position of holding bat can not make to be pointed forefinger particularly and takes into account equilibrium control to each position of racket face, bad to the longitudinal central axis line lower position control of racket batting district often, and this part is the main region that impacts bead, moreover the sweet district center of major control racket finger distance batting is far away, also cause feel bad, in addition, also have some basic design errors, such as, lever is too greatly too thick, a lot of single finger-holes are set, card too extremely adjusts bat angle inconvenience etc. when holding, causing in use slipping up much is difficult to again overcome by training, and finally can't popularize.

Table tennis bat is developed by tennis, racket head reduces, handle shortens, netted face becomes the rubber face, this all is in order to adapt to the characteristics of table tennis, be in order better to impact control, but we still face the obstacle in the very big equipment use at present, played the motion of multiple sport balls the people cognition is all arranged, crossing the threshold of table tennis wants difficult relatively, if the both sides of object for appreciation ball can play a plurality of bouts to ball and not slip up, at least to practise under the amateurish situation more than half a year to one year, and shuttlecock or some other ball, only need carry out being familiar with and being poised for battle once week even several days, this material that comes from present use on the one hand not enough outside the advanced person important reasons be our pen-hold grip of using and its face control of hold of shake-hands grip at present, it all is the action of non-physiology nature, need do a large amount of acclimatization trainings, it seems from pen-hold grip, face was below the forearm extended line when it was held bat naturally, to well have an effect will adjust wrist realize batting face and forearm extended line near or overlap, its finger is held on the axis of bat, main sticking point is also on the axis, so strength is concentrated, control also fine, but also be since its mode of holding bat to cause pressing when clapping wrist to do big angle adjustment in forehand wide-angle and backhand wide-angle very hard, need come the inclination angle of wide-angle adjustment bat with finger, this adjusted hold bat very unsane, strength is also little, if run into obvious especially that the quick transfer problem of froehand-backhand wide-angle just shows, also has backhand, even if after the new technology that occurs reversing penhold backhand, this mode of being held bat by several fingers does not still change the little and limited fundamental drawback of angle of backhanding attack of its strength; Face was above the forearm extended line when shake-hands grip was held bat naturally, whole palm is held handle, the grip foot, moment is long, strength is big, but because, the position in the sweet district of the relative batting with thumb of control finger forefinger the most flexibly is far away, the longitudinal central axis linear distance in the relative racket batting with thumb of forefinger district is also far away, angle variation control to racket is bad relatively, feel is also good inadequately, face is above the forearm extended line, often have an effect very smoothly or choose and beat all and will avale racket head come in order to realize, make that ball batting face and arm are in alignment, this additional move meeting causes the reaction time slow, the anxiety of wrist portion ligament is elongated the accuracy that also influences racket control, mostly be to overcome about directly holding horizontal bad difficult of angle control and feel of holding by a large amount of acclimatization trainings, prolong the adaptation difficulty virtually and increased the amusement cost, the China of highly-specialised is arranged just because of there is powerful training system to cause us not enough easily for table tennis to the attention of equipment detailed problem, this is exactly the threshold of a grasp for the amateur, why relatively this also be table tennis other one of reasons of more difficult grasp of moving, and do not have one of reason that is difficult to develop under the powerful national traditional system support especially abroad.

3, summary of the invention

In order to overcome existing straight plate, the problem that transverse slat handle structure physiology is limited, the beginner can not very fast adaptation table tennis and influence the problem of masses' development and the improvement of complying with the physiology curvature of base board of table tennis bat---and the face batting was distinguished near the forearm extended line when batting face was adjusted to nature and held bat, and still can keep the good problem of having an effect and controlling, it is a kind of that the utility model provides, and under the prerequisite of the physiology curvature nature grasping that can realize coincideing good control can also be arranged, strength, wide-angle is pressed to clap and is regulated the base board of table tennis bat of being learned to use by the beginner easily easy and that do not need too many acclimatization training relatively.

The utility model is achieved by the following technical solution: comprise striking plate, the racket lever, the projection of finger-hole and racket back upper place is formed, its structure is: lever forms groove in conjunction with the place with projection summit with the vertical range of the longitudinal central axis line in racket batting district in the axis upwards 2 centimetres to the axis within downward 2 centimetres, finger-hole can pass three fingers simultaneously, be located at the front lower place of lever, and be in longitudinal central axis line one side in racket batting district fully, and lever is spent between 60 degree 10 with the angle of the longitudinal central axis line in racket batting district in conjunction with the line that the place forms the top center point of the summit of groove and finger-hole with projection; The structure of this lever makes goes smoothly when grasping tiger near racket batting district longitudinal central axis line, forefinger root and thumb also can nature be fitted near batting district's longitudinal central axis line, clamp racket longitudinal central axis line, middle finger, the third finger and little finger of toe pass finger-hole and hold lever, the batting district of racket just is positioned near the forearm extended line, and and palm be in almost same plane, hand to the perception of face position, angle and vibration and control all more freely; The wide-angle of froehand-backhand and nearly body position attacking driving, lifting the ball and face inclination angle can both easily be realized adjusting on a large scale by the rotation wrist and the fine setting of forefinger thumb of nature, and wrist is not tight, also can be as the froehand-backhand wide-angle of getting a penhold grip be regulated face difficulty owing to be that whole palm is held to be greater than on the handle strength and got a penhold grip; Yet can not realize batting face and forearm straight line and twist physiology and make wrist tight dumb for the smooth and easy wrist of having an effect of will forcing down as shake-hand grip; In bead control, because forefinger and thumb closely are attached near the longitudinal central axis line in racket batting district, the strength of forefinger thumb can be delivered to the sweet district of batting very smoothly, the reliable forefinger thumb of the application of force of little strength is finished, and this point is compared forefinger and had a clear superiority in bead control away from the shake-hand grip of racket longitudinal central axis line; Forefinger and thumb are nearer than shake-hand grip apart from the sweet district of batting, and this has also produced good ball-handling feel; Its natural grasping more meets the Human Physiology curvature than existing pen-hold grip and shake-hands grip, and the beginner need not take much time and do adaptation training; The key finger that control was clapped when more crucial was grasping the utility model structure lever---thumb just is fitted on the longitudinal central axis line in racket batting district, forefinger refers to that root also pastes thereon, reach out below and be fitted in longitudinal central axis line below, racket batting district nearby of the finger tip of forefinger, the regional feel control of the main face zone that this point is handled bead---racket longitudinal central axis line below is fine and can take into account control to the zone on the racket longitudinal central axis line, because we are in bead control, major requirement control be the zone of the longitudinal central axis line below of racket, attacking driving and on revolve at a stalemate in major requirement be control to longitudinal central axis line and upper section; But this part is less demanding for the control precision, and the forefinger leading portion just can be realized good control to this part near being in center line; Finger is had an effect and is directly delivered to the sweet district of batting by the longitudinal central axis line, and is smooth and easy naturally, and also feasible bat angle adjustment energy among a small circle of while is convenient and swift to be the small rotation realization of axle with racket batting district longitudinal central axis line by forefinger and thumb; It is the most key in the structure that to be lever spend between 60 degree 10 with the angle of the longitudinal central axis line in racket batting district in conjunction with the line that the place forms the top center point of the summit of groove and finger-hole with projection, this make the forefinger front end below racket batting district longitudinal central axis line nearby, only this position could solve in the past the forefinger thumb that runs in some innovations on the forearm extended line of batting district excessively depart from racket batting district's longitudinal central axis line or forefinger thumb be in racket longitudinal central axis line above and having an effect of causing transmit have some setbacks and can't to below the racket longitudinal central axis line have at the racket zone of control bead specially better controlled between topic, because handling bead is mainly to be this zone, the structure function demand of this point and shake-hand grip has approximate part, to control here bad will cause the very poor error of control feel of bead a lot, can't play, the utility model makes forefinger balanced to the feel and the control ratio at position, longitudinal central axis line both sides, racket batting district, forefinger is in racket longitudinal central axis line below nearby naturally, the froehand-backhand bead is controlled good hand touch freely, finger is fine-tuning to racket longitudinal central axis line during forehand arcing circle, the feel of the ball is good, draw hit all very strong, can not attend to one thing and lose sight of another, perception and the control to batting all is better than in the past to the improved similar invention of lever on the whole; More than these improve and all to have realized architecture advances not only advanced but also that do not lose contact with reality and use.

Such scheme can also be done further improvement by following measure:

Lever is flat and its width is the narrowest is between 3 centimetres to 4 centimetres, and width the widest part is between 3.5 centimetres to 5.5 centimetres.This size further defines the lever dimension scale, this has the perception at perception, the horizontal elevation angle of face at the vertical elevation angle of tangible face and also more clear simple to the finger adjustment at the racket elevation angle when having guaranteed the grasped racket, the shape that also can be fit to palm makes applying tight naturally.

Lever is spent between 90 degree 70 with the angle of the axis of lever in conjunction with the line that the place forms the top center point of the summit of groove and finger-hole with projection.The lower edge that middle finger and tiger can easily be withstood finger-hole upper edge and projection simultaneously under can the prerequisite of holding lever of nature when making grasping in this angular range, it is stronger to bat, and it is also more sane to control.

Lever is spent between 85 degree 75 with the angle of the axis of lever in conjunction with the line that the place forms the top center point of the summit of groove and finger-hole with projection.Make that in this angular range middle finger and tiger can more accurate applying lever and rackets.

Lever forms groove in conjunction with the place with projection summit with the vertical range of the longitudinal central axis line in racket batting district its upwards 1 centimetre to it within downward 1 centimetre.In this zone, make tiger more approaching with the distance of axis, be fit to the comprehensive control of medium sized palm to the upper, middle and lower portion in racket batting district more, the position of forefinger makes its mobile adjusting by among a small circle just can take into account perception and the control to each position of racket.Help not having the blind area of control in the batting control.

Lever is spent between 45 degree 10 with the angle of the longitudinal central axis line in racket batting district in conjunction with the line that the place forms the top center point of the summit of groove and finger-hole with projection, makes the front end of forefinger more guaranteedly to be in and can take into account the position that all there is good control racket longitudinal central axis line both sides.

Lever is spent between 35 degree 15 with the angle of the longitudinal central axis line in racket batting district in conjunction with the line that the place forms the top center point of the summit of groove and finger-hole with projection, makes the front end of forefinger accurate being in can take into account the position that all there is good control racket longitudinal central axis line both sides.

The angle of the lower edge of lever back edge and projection is spent between 85 degree 60.In this angular range, meet the thickness Angular Dimension of tiger, the applying of energy degree of tightness degree of having is lived, and helps the control and the application of force to plate body, also can easily movablely regulate the position of holding bat, and deacclimatizes the variation of holding bat of froehand-backhand.

The top center point of finger-hole with the longitudinal central axis line vertical range in racket batting district greater than 1 centimetre.This can guarantee that forefinger root and thumb can be fitted on the racket longitudinal central axis line when holding bat, help control.

The length of the lower edge of projection is greater than 3.5 centimetres, and this quality that has guaranteed longitudinal central axis line both sides, racket batting district is more near balance, and face stable equilibrium when helping swinging the bat is to the tightr easier fixing bat shape of the applying on tiger top.

The utility model is compared with prior art following advantage: because the longitudinal central axis line in racket batting district is close with the forearm extended line, have an effect finger forefinger and thumb all is fitted near the longitudinal central axis line in racket batting district, the forefinger front end is near the racket longitudinal central axis line below, and the sweet district of distance batting is very near, and middle finger, the design feature that nameless and little finger of toe can both be held handle naturally like a cork causes: with respect at present general getting a penhold grip and shake-hand grip of use, the batting district of clapping under its situation of holding bat naturally is positioned near the forearm extended line, the strength transmission loss is little, the smoothness of having an effect, and swing the bat without the physiology curvature of wristlock, no matter bat in the still middle road of forehand backhand, can both armrest wrist easy adjustment put in place for the adjusting of clapping the position, this point is that pen-hold grip and shake-hands grip are not available, and action is all smaller and quick reliable, the fine setting of finger is also clear convenient, forefinger root and thumb fit tightly on racket longitudinal central axis line, finger is accurate to the perception of bat angle, because more meet the physilogical characteristics of human body, prolongation as palm, to cause its speed fast like this, control is sane, have an effect strong and move hidden diverse technical characterstic, with respect to improved invention in the past to the position of holding bat, it does not violate the principle that the point of application of having an effect can not too depart from racket batting district longitudinal central axis line, and the finger of major control racket apart from the sweet offset of batting from closely, feel control for racket is all fine, the forefinger front end is positioned at racket longitudinal central axis line below nearby, the various piece of having only the control racket batting district that this position can general equilibrium has significantly reduced the blind area in the control and has helped reducing and dub; For the beginner, the prolongation of nature of holding bat as palm, control is got up just relatively easy a lot, there is not the code requirement of many especially technical movements and wristlock, upward quick-moving and the ABC of easy yet, froehand-backhand does not have obvious leak, increased the interest of table tennis motion, helped the fan and select with universal widely.Pai Ban improvement does not have complicated structure not have obvious variation with the production cost and the technology of existing product in addition, the production conversion cost of carrying out new product is little, also can continue to use for the auxiliary facility of having the final say, rubber, packing etc., need not independent adjustment, reduce production cost to greatest extent.

4, description of drawings:

Fig. 1 is the preceding diagrammatic sketch of the utility model embodiment, and Fig. 2 is the right view of the utility model embodiment.

5, the specific embodiment:

Below in conjunction with accompanying drawing the utility model is described further

The utility model embodiment as illustrated in fig. 1 and 2, comprise striking plate 1 and racket lever 2, finger-hole 3 and projection 6 are formed, wherein 4 is back edges of lever 2, the 5th, the lower edge of projection 6, the 7th, the longitudinal central axis line in racket batting district, the 8th, the summit of lever 2 and projection 6 formed grooves, the 9th, the central point at the edge, top of finger-hole 3, the 10th, the axis of lever 2, in this structure, finger-hole 3 can pass three fingers simultaneously, be in the front lower place of lever 2, and be in longitudinal central axis line 7 one sides in racket batting district fully, lever 2 forms groove in conjunction with the place with projection 6 summit 8 with the vertical range of the longitudinal central axis line 7 in racket batting district its upwards 2 centimetres to it within downward 2 centimetres, and lever 2 is spent between 60 degree 10 with the angle of the longitudinal central axis line 7 in racket batting district in conjunction with the line that the place forms the top center point 9 of the summit 8 of groove and finger-hole 3 with projection 6.In this angular range, make the hand of lever be in the control that helps forefinger and thumb and take into account top the batting district, the plate body optimum position of middle part and bottom, formation does not have the technology of obvious leak to implement, simultaneously hand when grasping tiger near racket batting district longitudinal central axis line 7, forefinger root and thumb also can nature be fitted on batting district's longitudinal central axis line 7, middle finger, nameless and little finger of toe passes finger-hole 3 and holds lever 2, the batting district of racket just is positioned near the forearm extended line, racket is as the prolongation of palm, and and palm be in almost same plane, hand is controlled all more freely the perception of face position angle, the batting of swinging the bat can directly start the position that need not to adjust bat and forearm, the attacking driving of froehand-backhand, the face inclination angle can both easily rotate by wrist and realize the bat of wide-angle pressure during lifting the ball, and wrist can be not tight, more meet the Human Physiology curvature than existing pen-hold grip and shake-hands grip, the beginner need not take much time and deacclimatize training; This appearance of holding, the key finger that control is clapped---forefinger root and thumb can both be fitted near the racket batting district longitudinal central axis line, realized pointing having an effect and be delivered to the sweet district of batting and very near apart from the sweet district of batting with the control finger by the longitudinal central axis line, no matter these are to controlling the angle of racket, it is smooth and easy that square stance is had an effect, still control the sweet district of batting of racket, promptly the perception of ball and control all are better than in the past the improved invention of lever, have realized technological improvement not only advanced but also that do not lose contact with reality and use.Lever is flat and its width is the narrowest is between 3 centimetres to 4 centimetres, and width the widest part is between 3.5 centimetres to 5.5 centimetres.This size further defines the lever dimension scale, this has the perception at perception, the horizontal elevation angle of face at the vertical elevation angle of tangible face and also more clear simple to the finger adjustment at the racket elevation angle when having guaranteed the grasped racket, the shape that also can be fit to palm makes applying tight naturally.Lever 2 is spent between 85 degree 75 with the angle of the axis 10 of lever in conjunction with the line that the place forms the top center point 9 of the summit 8 of groove and finger-hole 3 with projection 6.Make that in this angular range middle finger and tiger can more accurate applying lever and rackets.Lever 2 with protruding 6 agllutinations close summit 8 that the place forms groove with the vertical range of the longitudinal central axis line 7 in racket batting district its upwards 1 centimetre to it within downward 1 centimetre.In this zone, make lever more approaching with the distance of axis, be fit to of the comprehensive control of medium sized palm more to the upper, middle and lower portion in racket batting district, the position of forefinger makes its mobile adjusting by among a small circle just can take into account perception and the control to each position of racket, help batting control, do not have the obviously blind area of control.Lever 2 closes the line that the place forms the top center point 9 of the summit 8 of groove and finger-hole 3 with protruding 6 agllutinations and spends between 35 degree 15 with the angle of the longitudinal central axis line 7 in racket batting district, makes the front end of forefinger accurate being in can take into account the position that all there is good control racket longitudinal central axis line both sides.The angle of the lower edge 5 of lever 2 back edges 4 and projection 6 is spent between 85 degree 60.In this angular range, meet the thickness Angular Dimension of tiger, the applying of energy degree of tightness degree of having lives to clap, and helps the control and the application of force to plate body, also can easily movablely regulate the position of holding bat, and deacclimatizes the variation of holding bat of froehand-backhand.The top center point 9 of finger-hole 3 with longitudinal central axis line 7 vertical ranges in racket batting district greater than 1 centimetre.This can guarantee that forefinger root and thumb can be fitted on the racket longitudinal central axis line when holding bat, help control.The length of the lower edge 5 of projection 6 is greater than 3.5 centimetres, and this quality that has guaranteed longitudinal central axis line 7 both sides, racket batting district is more near balance, face stable equilibrium and fixing to tiger when helping swinging the bat.

Claims

1. improved base board of table tennis bat of shank, comprise striking plate (1), racket lever (2), finger-hole (3) and projection (6) are formed, it is characterized in that: the same projection of lever (2) (6) forms groove in conjunction with the place summit (8) with the vertical range of the longitudinal central axis line (7) in racket batting district its upwards 2 centimetres to it within downward 2 centimetres, finger-hole (3) can pass three fingers simultaneously, be positioned at the front lower place of lever (2), and be in longitudinal central axis line (7) one sides in racket batting district fully, and the same projection of lever (2) (6) form in conjunction with the place summit (8) of groove and finger-hole (3) top center point (9) line with the angle of the longitudinal central axis line (7) in racket batting district 10 spend spend to 60 between.

2. base board of table tennis bat according to claim 1 is characterized in that: lever (2) is flat and its width is the narrowest is between 3 centimetres to 4 centimetres, and width the widest part is between 3.5 centimetres to 5.3 centimetres.

3. base board of table tennis bat according to claim 1 is characterized in that: the same projection of lever (2) (6) form in conjunction with the place summit (8) of groove and finger-hole (3) top center point (9) the same lever of line (2) axis (10) angle 70 spend spend to 90 between.

4. according to claim 1,2 or 3 described base board of table tennis bat, it is characterized in that: the same projection of lever (2) (6) form in conjunction with the place summit (8) of groove and finger-hole (3) top center point (9) the same lever of line (2) axis (10) angle 75 spend spend to 85 between.

5. according to claim 1,2 or 3 described base board of table tennis bat, it is characterized in that: the same projection of lever (2) (6) forms groove in conjunction with the place summit (8) with the vertical range of the longitudinal central axis line (7) in racket batting district its upwards 1 centimetre to it within downward 1 centimetre.

6. according to claim 1,2 or 3 described base board of table tennis bat, it is characterized in that: the same projection of lever (2) (6) form in conjunction with the place summit (8) of groove and finger-hole (3) top center point (9) line with the angle of the longitudinal central axis line (7) in racket batting district 10 spend spend to 45 between.

7. according to claim 1,2 or 3 described base board of table tennis bat, it is characterized in that: the same projection of lever (2) (6) form in conjunction with the place summit (8) of groove and finger-hole (3) top center point (9) line with the angle of the longitudinal central axis line (7) in racket batting district 15 spend spend to 35 between.

8. according to claim 1,2 or 3 described base board of table tennis bat, it is characterized in that: the angle of the lower edge (5) of lever (2) back edge (4) and projection (6) is spent between 85 degree 60.

9. according to claim 1,2 or 3 described base board of table tennis bat, it is characterized in that: the top center point (9) of finger-hole (3) with longitudinal central axis line (7) vertical range in racket batting district greater than 1 centimetre.

10. according to claim 1,2 or 3 described base board of table tennis bat, it is characterized in that: the length of the lower edge (5) of projection (6) is greater than 3.5 centimetres.