CN1050307C

CN1050307C - Games racket

Info

Publication number: CN1050307C
Application number: CN92114632A
Authority: CN
Inventors: R·C·海因斯
Original assignee: Dunlop Ltd
Current assignee: Dunlop Ltd
Priority date: 1991-11-12
Filing date: 1992-11-12
Publication date: 2000-03-15
Anticipated expiration: 2007-11-12
Also published as: GB2261380A; EP0542461A3; AU668113B2; EP0542461A2; CN1076634A; CA2082257A1; GB2261380B; JPH05208054A; AU2814692A; GB9223060D0

Abstract

A games racket frame particularly for tennis has a novel stringing system in which individual holes are used for main- and cross-strings and the holes lie in one of two notional planes parallel to the plane of interlaced main- and cross-strings such that successive string ends enter holes positioned in different notional planes and for over two-thirds of the total number of main- and cross-strings both ends of each string go through holes in the same notional plane.

Description

Ball racket

The present invention relates to a kind of ball racket as tennis, squash or shuttlecock.Its improvement is a kind of new string system, and this new string system can make racket produce favourable balling effect.

Most of ball rackets comprise frame and handle, a plurality of hole and two groups of strings that run through frame are arranged on the frame, one group of string is essentially vertically (main string), and another group string is essentially laterally (horizontal string), and main string and horizontal string are intertwined to form basic striking surface for two dimension.The string that is made of main string and horizontal string can right angle intersection, or can be not with right angle intersection.When on frame, stretching tight string when string is passed aperture, obviously, string be arranged in the layout that depends on these holes to a great extent.The making of most of rackets is to make the axis in each hole be positioned at by main string that interweaves and the determined central plane of horizontal string, and the what is called string plane that interweaves will be described below.

Have found that, the hole of wearing string is not arranged in the plane of the string formation that interweaves, just can obtain favourable effect and make a kind of special arrangement.

According to the present invention, ball racket comprises a frame, this frame limits by what main string and horizontal string were woven into and basic is the two-dimensional plane group, string passes on the frame independently hole, above-mentioned hole is by in the plane in two imaginary planes of the plane parallel of main string that axially is arranged on and interweaves and horizontal string formation, and be positioned at and plane that the main string that interweaves and horizontal string form equally spaced, each side on the plane that is woven into by main string and horizontal string, the end of linking up of winner's string and horizontal string is entered stagger in the hole that is arranged in the different imaginary planes, the string number that the two ends of every string are through in the hole in the same imaginary plane reaches more than 2/3rds (66.67%) of main string and horizontal string sum.

Content according to a further aspect in the invention, a kind ofly be included in the hole that setting allows main string and horizontal string pass on the frame for the stretch tight method of string of frame of racket, these holes are located in two parallel imaginary planes, the end that winner's string and horizontal string are linked up enters in the hole that is located in the different imaginary planes with staggering, main string and horizontal string are paralleled between two imaginary planes, with two imaginary planes and equally spaced plane in be interweaved, the string number that the two ends of every string are passed in the hole in the same imaginary plane reaches more than 2/3rds (66.67%) of main string and horizontal string sum.

A kind of mode that realizes this layout provides odd number root master's string and the horizontal string of odd number root.

The potential batting advantage of the present invention be when ball near frame with clap when contact, the string that lacks half by the string than common fulcrum ball supports basically, has so just produced a kind of effect, promptly the striker thinks that the vibrations that pellet impact causes have reduced.So just can improve ball and hit the even sense of clapping when touching on the striking surface of the whole string that stretches tight.

Another advantage of this layout is that the tension force of adjacent string changes when string net (striking surface) is out of shape on string because of ball hits, and promptly wherein the tension force of a string increases and the tension force minimizing of another root string.Like this, the embedding string degree of depth of the embedding string depth ratio of sphere tradition racket sphere is darker on the string with high tension of being separated by, thereby can make the ball rotation more go through evil.Also can obtain the darker embedding string degree of depth for shuttlecock cork collet, and this embedding string degree of depth is good in badminton game.

Usually, if be positioned at the requirement that same imaginary plane endoporus is all passed at two ends that the main string of frame central area and horizontal string (even by two outermost horizontal strings and two corresponding main strings or by two outermost main strings and two central areas that rectangle or quadrangle surrounded that are connected on frame that corresponding horizontal string is determined) satisfy every string, major advantage of the present invention just reflects.The number of this class string accounts for more than 66.67% of total bat string number, is generally more than 75%.Certainly, the string number that satisfies these regulations also rises to 100%, makes whole string face scope can both reach desirable characteristic like this, and makes racket have optimum performance.

In a preferred embodiment of the present invention, the contiguous mutually place in the termination of each main string and horizontal string, the hole of wearing these strings all is located in the described imaginary plane, and in not only perpendicular to interweave face but also the plane perpendicular to this place frame tangent plane partly.And setover mutually in the hole outside adjacent place, the end of main string and horizontal string, rather than aim in the plane perpendicular to the interleaved planes of string.As a kind of remodeling to the embodiment of the invention, the adjacent end portion of main string and horizontal string also can be more than a pair of.In this case, two string holes of every pair of string not only are located in the different imaginary planes, and are located at perpendicular to interleaved planes and vertical frame in the plane of the tangential plane of these positions.

Also with reference to the accompanying drawings embodiments of the invention are described by means of an example now.

Fig. 1 is the part side view of new racquet frame;

Fig. 2 is the cross-sectional view of the frame part of Fig. 1;

Fig. 3 is the part front view of the new frame of racket part shown in Fig. 1 and Fig. 2.

With reference to figure 1 and Fig. 2, the hole of wearing on the frame 5 of horizontal string is positioned in two

imaginary planes

1,2, and each side on the plane that the string 3 that interweaves constitutes respectively has an imaginary plane, and they are parallel to each other and are equidistant with the face that is woven into.These Kong Congyi imaginary plane alternately is provided with to another imaginary plane, and in these planes and these interplanars setover mutually so that provide suitable interval to form string knitmesh.Although not shown, horizontal string number should be odd number.Though clearly do not draw, main string 4 arranges that also identical and its quantity is odd number.Fig. 2 has represented the string mode of wearing of close string termination, this mode be make the string end alternately from an imaginary plane to another imaginary plane, and the relative two ends of string are positioned at same imaginary plane.In Fig. 3, in the frame central area (promptly by two outermost horizontal strings and two corresponding main string (regional A ₁B ₁C ₁D ₁) or by two outermost main strings and two corresponding horizontal string (regional A ₂B ₂C ₂D ₂) determine in the rectangle or the quadrangle that are connected in the frame surround) in main string and the requirement of all passing the interior hole of same imaginary plane of the horizontal string two ends that will satisfy every string.Illustrated frame is a tennis racket frame, but for clarity sake, the quantity of main string and horizontal string has all reduced.Usually tennis racket has the string of many same models.

Obviously, when main string and horizontal string are interweaved, the main body of string will remain in the plane, and this plane is with to wear the occupied plane of string in the string racket be same plane traditional.Yet near frame, each string will be on this plane, causes these strings to pass and is arranged on the imaginary hole that lays respectively in the both sides, string plane that interweave, the plane that is separated from each other.

Claims

1. a ball racket comprises a frame part (5), this part has determined that one is the group on plane substantially by what main string and horizontal string were interwoven, these strings pass independently hole, above-mentioned hole axially is located at two imaginary planes (1 that are parallel to the plane (3) that main string and horizontal string be interwoven, 2) in the plane, above-mentioned imaginary plane is in the both sides on the plane (3) that main string and horizontal string be interwoven respectively, and it is equidistant with interleaved planes, causing the end of linking up of main string and horizontal string to enter is arranged alternately at different imaginary planes (1,2) in Nei the hole, it is characterized in that main string and horizontal string count the two ends of the string more than 2/3rds (66.67%) of summation and pass hole in the same imaginary plane (1 or 2).

2. racket according to claim 1 is characterized in that main string number is an odd number.

3. racket according to claim 1 and 2 is characterized in that horizontal string number is an odd number.

4. racket according to claim 1 is characterized in that described main string and horizontal string count the two ends of the string more than 75% of summation and pass hole in the same imaginary plane.

5. racket according to claim 1, the hole in the same imaginary plane is passed at the two ends that it is characterized in that being essentially 100% main string and horizontal string.

6. racket according to claim 1, it is characterized in that the place adjacent with horizontal string end in each main string end, the hole of wearing these strings all is located in the described imaginary plane, and is positioned at not only the plane that is interwoven perpendicular to main string and horizontal string but also perpendicular to the plane at the tangent plane of the frame at this place.

7. racket according to claim 6, the adjacent end portion that it is characterized in that main string and horizontal string is more than a pair of.

8. method that the frame of ball racket is partly worn string, this method may further comprise the steps: process the hole that is used to wear main string and horizontal string and is positioned at two parallel imaginary planes on the frame of racket; Main string and horizontal string are passed described hole, the end of linking up of winner's string and horizontal string is entered in the hole that alternately is located in the different imaginary planes, main string and horizontal string between two imaginary planes and with the plane of imaginary plane parallel equidistant in be interweaved, the two ends that it is characterized in that horizontal string more than 2/3rds (66.7%) and main string are passed in the hole in the same imaginary plane.