CN2133330Y - Racket handle form conversation - Google Patents

Abstract

The utility model relates to a racket handle form conversation. In order to improve the disadvantage that when the handle is held, the side peak of the end of the octagon column handle of the traditional tennis racket acts the salient function on the muscle of hypothenar of the palm to cause the inner cocoon (negative substance hardening) to be easily generated, the side peak of the end of the handle is combined into a new polyhedron similar to the cut surface of the diamond by utilizing the mutual conversion of two nonsimilar symmetrical convex polygons of the transverse section of the handle of the racket to be converted into a wedge slope to avoid the salient function of the side peak and provide a space position which makes the muscles of the palmar surface more comfortable and appressed.

Description

Racket handle form conversation

The utility model is the shape conversion with a kind of racket lever, side summit for improvement tennis racket octagon column lever end, when lever, the palm muscle of hypothenar is produced sharp protruding effect, easily produce the shortcoming of meat cocoon (cutin sclerosis), and,, change into an inclined-plane in the mode of similar diamond cut surface with the sharp concave vertex at this position, avoid the generation of meat cocoon, and provide motion facies palmaris muscle properer comfortable locus.

The lever of general traditional racket is an octagon column, and its cross section is a symmetrical octagon, and the end portion of racket lever expands outwardly, and its cross section area is greater than the cross section of leading portion octagon column, but the two is to be similar octagon; As shown in Figure 1, known traditional tennis racket is in gripping square stance, and the side summit of this racket lever end produces the sharp protruding effect of replacing for the palm muscle of hypothenar, makes application of force inconvenience and easily produces meat cocoon shortcomings such as (cutin sclerosis).

Main purpose of the present utility model provides a kind of shape conversion of racket lever, mode with similar diamond cut surface, side summit with racket lever end, transform into an inclined-plane, avoid the palm muscle of hypothenar to produce sharp protruding effect, and can provide motion facies palmaris muscle properer comfortable locus.

Figure 1 shows that existing racket lever, to the schematic diagram of facies palmaris sharp protruding effect that muscle of hypothenar produces.

Fig. 1-A is that palm grips the racket schematic diagram.

Fig. 1-B is subjected to the schematic diagram of the protruding effect of side summit point of racket lever end for the palm muscle of hypothenar.

Fig. 1-C is the terminal cross section of a racket schematic diagram.

Figure 2 shows that terminal cross section of existing racket and racket wire side, the position view on plane coordinates.

Figure 3 shows that the existing racket lever of using, the position view on air coordinates.

Figure 4 shows that the terminal cross section of the utility model racket lever, this side summit transforms the enforcement view of displacement.

Figure 5 shows that the terminal cross section of the utility model racket lever, this side summit transforms another embodiment schematic diagram of displacement.

Figure 6 shows that the terminal cross section of the utility model racket lever, this side summit transforms the another embodiment schematic diagram of displacement.

Figure 7 shows that the utility model racket lever is combined into new polyhedral enforcement view by two kinds of non-similar symmetrical convex polygons conversions.

Figure 8 shows that the utility model racket lever is combined into new polyhedral enforcement view by other two kinds of non-similar symmetrical convex polygons conversions.

Figure 9 shows that the utility model racket lever is combined into new polyhedral enforcement view by other two kinds of non-similar symmetrical convex polygons conversions.

Figure 10 shows that the terminal cross section of the utility model racket lever, but the new polygon that the external circular arc of its two sides mat isosceles trapezoid is transformed.

Figure 10-A is depicted as the terminal cross section of the utility model racket lever, but its two sides mat isosceles trapezoid inscribe circular arc, the new polygon that is transformed.

See also shown in Fig. 2,3, the racket lever of this tradition octagon column, its cross section is on plane coordinates, and the position of racket wire side and racket lever concerns as shown in Figure 2; Moreover, the central shaft of racket is for passing through axle (TRANSVERSALAXIS), Z axle on air coordinates, passing through a center axis point by racket lever terminal surface is initial point O, become vertical axle to be transverse axis (X) with the wire side of tennis racket by initial point O, straight line vertical with transverse axis and by initial point O is the longitudinal axis (Y), and by above-mentioned bc shown in Figure 2, b ' c ' is a longitudinal axis parallel edges; Aa ', bb ' are the transverse axis limit; Ab, cd, a ' b ', c ' d ' are hypotenuse.

The racket lever that is characterised in that traditional octagon column of the present utility model, the terminal cross section side of this racket lever summit is to the palm muscle of hypothenar, produce sharp protruding effect, the shortcoming of cocoon (cutin sclerosis) in easily producing, and with the sharp concave vertex at this position, change into the inclined-plane, and provide motion facies palmaris muscle properer comfortable locus.The wherein conversion on side summit, the terminal cross section of racket lever, as shown in Figure 4, tradition octagon column racket cross section abcdd ' c ' b ' a ' octagon, this side summit b, because of dwindling of bc levels off to zero, be converted into the p point, produce the b point and disappear, form the ap hypotenuse, and reach the purpose of this utility model; In like manner as can be known, b ', c ' and c point also can change into hypotenuse.

As shown in Figure 5, aa ' and dd ' all expand outwardly into ee ' and ff ', and bc dwindles and levels off to zero, be converted into the p point, side summit b point then disappears, form the ep hypotenuse, also can reach above-mentioned purpose shown in Figure 4; In like manner as can be known, b ', c ' and c point also can change into hypotenuse as shown in Figure 5.

As shown in Figure 6, by traditional octagon column racket lever cross section abcdd ' c ' b ' a ' octagon, wherein transverse axis limit a ' a, d ' d and longitudinal axis parallel edges bc, b ' c ' all can dwindle length or it is to forming little arc chord angle, and make eight end points a, b, c, d, d ', c ', b ' and a ' of script all can transform disappearance, and form four new hypotenuses.

The utility model racket lever is to utilize forward and backward different and non-similar convex polygon more than two, and mutually combining to transform forms a new protruding gengon, and can reach the side summit of eliminating racket lever end, and a comfortable smooth wedge inclined-plane can be provided.And aforementioned its primary condition of so-called similar figures is that (1) corresponding angles palpus is equal.(2) each corresponding sides is in equal proportions.Hence one can see that, and two polygons of different edge number are non-similar figures, or hypotenuse is greater than the polygon of longitudinal axis parallel edges, is non-similar figures with the cross section hypotenuse of traditional racket lever less than the octagon of longitudinal axis parallel edges also even be all octagon.

Hypotenuse that the utility model is referred to as is meant in the cross section plane coordinates of racket lever, as shown in Figure 2, in same quadrant, the also crooked line segment or the broken line person continuously of not parallel transverse axis of parallel longitudinal axes neither.Its crooked direction is at first quartile: line segment tilts to transverse axis by being docile and obedient clockwise near the end points of the longitudinal axis.At second quadrant: line segment is by the end points near the longitudinal axis, counterclockwise transverse axis is tilted.At third quadrant: line segment is by the end points near transverse axis, with counterclockwise to vertical axis tilt.At four-quadrant: line segment is by the end points near transverse axis, in a clockwise direction to vertical axis tilt.

As shown in Figure 7, racket lever of the present utility model, be to combine with two non-similar symmetrical convex polygons to change into a new polyhedron, by being among Fig. 7 by traditional octagon column racket lever, its cross section is the octagon of abcdd ' c ' b ' a ', with terminal cross section be efgg ' f ' e ' hexagon, combine and produce new polyhedron as the diamond cut surface.If by the terminal cross section of racket lever, by doing orthographic projection view on the initial point, the considerable same divinatory symbol that go out on air coordinates resemble in (OCTANT), and the hypotenuse relation of the two non-plane of similaritys that combine has parallel or uneven two kinds of situations.If under parallel condition, the two non-similar figures that combine have following seven kinds of parallel relation: (1) two limit is parallel: parallel as the cross section octagon of triangle and traditional octagon column (below analogize) (2) three limits: as triangle, pentagon.(3) four limits are parallel: as rhombus.(4) five limits are parallel: as pentagon.(5) hexagon is parallel: as hexagon.(6) seven limits are parallel: as heptagon.(7) eight limits are parallel: as octagon, decagon etc.The polygon that parallel edges relation wherein can be arranged with octagon, have unlimited many, but to meet the practicality of racket lever below the decagon.In other words, if neither when parallel, then have only four limits can produce parallel relation at most in octagon and other the symmetrical polygons at hypotenuse; On initial point, make its parallel line segment of orthographic projection, then spatially be parallel lines, two parallel segments are totally one plane, if make the uneven line segment of orthographic projection on the initial point, can not form a plane at three of conllinear, because above-mentioned two line segments are coplane not, then four of two line segments end points are capable of being combined becomes two leg-of-mutton folding faces, therefore the symmetrical polygonal combination of two different edge numbers, produce the binding of several triangle folding faces, new polyhedron as shown in Figure 7, this polyhedron is formed looks like driving fit mutually as the wedge shape, just like the cut surface of diamond.

By shown in Figure 7, can learn: the sharp convex portion of the octagonal side of (1) former tradition summit b has changed into face, (2) octagon and hexagon two racket lever cross sections are non-similar figures, and produce new polyhedron, (3) formed of this polyhedron is with driving fit mutually as the wedge shape, cut surface just like diamond, (4) do orthographic projection by the terminal cross section of racket lever with initial point, there is the corresponding line segment of two couples on transverse axis limit parallel, and four hypotenuses are neither parallel, (5) hypotenuse of hexagon is greater than longitudinal axis parallel edges, and longitudinal axis parallel edges equals zero.

As shown in Figure 8, be another embodiment state, combine with hexagonal mutual conversion by four side columns, as shown in Figure 7, can obtain lozenges equally, and the cd hypotenuse reaches elimination side summit and comfortable smooth veneer △ acd etc. is provided greater than longitudinal axis parallel edges.

As shown in Figure 9, be that the symmetrical convex polygon that racket lever two combines is octagon, and each limit all parallels, but the two is under the enforcement state of non-similar figures, it transforms the situation of combination, the outward appearance that expands outwardly with general traditional racket lever end is more approximate, only is that hypotenuse is greater than longitudinal axis parallel edges.

Learn by above-mentioned, the non-similar symmetrical convex polygon of racket lever cross section two mutual combinations is changed and the face number of the new polyhedron that produces, promptly the wherein arbitrary polygon of summation deduction is counted on the two polygonal limits that combine corresponding parallel limit number, gained poor is new polyhedral the quantity that conversion process produces.As shown in Figure 7, hexagon has two limits parallel with octagonal transverse axis limit, and (then 8+6-2=12) is that new polyhedron is 12.As shown in Figure 9, octagon has eight limits parallel with another octagonal limit, and (then 8+8-8=8) is that new polyhedron is an octahedral.

Shown in Figure 10, Figure 10-A, when the cross section octagon of racket lever, two line segments that link the transverse axis limit make pars intermedia be divided into then all the other two parts formation isosceles trapezoids of a rectangle add ' a ', the external circular arc and the inscribe circular arc that can get by isosceles trapezoid, then on the set circular arc in both sides, can get a suitable polygon, also can polygonal thus conversion, produce the new polyhedron on the racket lever.

Claims (9)

1, a kind of shape of racket lever is changed, and it is characterized in that the cross section of this racket lever, wherein has two kinds of convex polygons at least, and is non-similar figures each other; By the conversion of two kinds of convex polygons combination with the racket lever with the combining closely of several wedge inclined-planes, the racket lever is transformed produces a new polyhedron, and make the cross section side of racket end summit change into a hypotenuse.

2, the shape of racket lever as claimed in claim 1 conversion, it is characterized in that hypotenuse be same quadrant in, both not parallel transverse axis, the also formed limit of crooked line segment of the not parallel longitudinal axis.

3, the shape of racket lever as claimed in claim 2 conversion, it is characterized in that transverse axis is the cross section central point of racket lever, is initial point with the central point, makes this cross section polygon plane coordinate, being defined as of coordinate transverse axis is vertical with the extended planar of racket wire side, and the straight line by initial point.

4, the shape of racket lever as claimed in claim 2 conversion, it is characterized in that the longitudinal axis be with racket lever cross section by doing projection on the initial point, the straight line overlapping, and by initial point and perpendicular to the straight line of transverse axis with the racket wire side.

5, as the conversion of the shape of claim 3,4 described racket levers, it is characterized in that initial point be meant with whole racket lever to pass through axle be center line, this center line is the cross section central point of racket lever.

6, the shape of racket lever as claimed in claim 1 conversion is characterized in that cross section convex polygon is symmetrical convex polygon.

7, the shape of racket lever as claimed in claim 6 conversion, the hypotenuse of symmetrical convex polygon that it is characterized in that the racket latter end is greater than the parallel limit of racket wire side, and the parallel limit of racket wire side, and I equals zero or is not present in this symmetry convex polygon.

8, the shape of racket lever as claimed in claim 1 conversion is characterized in that its cross section of new polyhedron forms new polygonal limit number and meets two convex polygon limits and count summation and deduct the limit number that wherein arbitrary polygon has corresponding parallel edges.

9, the shape of racket lever as claimed in claim 1 conversion is characterized in that convex polygon, but mat disc or cambered surface change into the racket lever that convex polygon mutually combines.

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