332 results about "Racketball" patented technology

The invention relates to a squash racquet handle grip comprising at least an external surface and an internal surface, wherein said external surface includes raised surface ridges, wherein said raised surfaces ridges define (a) a forefinger receiving recess for receiving an index finger of a user's hand, (b) a first position site for receiving a thumb of a user's hand, and (c) a second position site for receiving a middle finger of a user's hand; wherein said forefinger receiving recess is disposed on said external surface at an angle relative to both said first position site and said second position site; and wherein said grip is attachable to a squash racket handle.

The invention is an improved sports racket comprising streamlined transversal strings and streamlined longitudinal strings with surface indentations that permit the strings to lock into each other at the string crossings so the strings do not move with respect to each other and also stay oriented so as to minimize wind resistance during the swinging motion of the sports racket before and after ball contact. The invention includes fixing means for assembly of the strings in the sports racket, said fixing means incorporating a flexible body between the string and the racket frame for the absorption and restitution of part of the ball's kinetic energy during impact with the string to beneficially alter the feel of the strings.

The present invention relates to a system for executing a table tennis game, and a method for displaying a table tennis game score using the same and, more specifically, to a system for executing a table tennis game, and a method for displaying a table tennis game score using the same, the system comprising a score calculation terminal which receives a sensing signal of a collision with a table tennis ball from impact sensors installed in a racket and in respective zones of a table tennis table, and calculates and displays the table tennis game score according to the input pattern of the received sensing signal.

A device adapted to be emplaced in a self-securing manner between adjacent strings of a tennis racquet for dampening vibrations caused by impact with a tennis ball produces beneficial sensory effects such as a whistling sound and flashing light.

The inventive fiber manufacturing process is particularly adapted for demanding applications such as sports racquets, including tennis racquets, badminton racquets and other sports applications. Because of the improved strength to weight ratio of components formed using the inventive method, a wide range of flexibility is achieved, allowing use of the inventive process to manufacture, for example, a fiber reinforced (for example, graphite) modular sports racquet, optionally provided with user- selectable weights and / or handle replacements. From the standpoint of the player, this allows a racquet frame featuring self customization. From the standpoint of a retailer, the benefit provided is reduction of inventory.; The inventive fiber, for example graphite fiber) racquet frame is filled with a plastic foam and is formed using, for example, microencapsulation technology to time, generate and apply the pressure used to form the graphite composite material of which the racquet is comprised. This compares to the standard industry technique of air injection. The racquet is thus not hollow like conventional graphite racquets, and the walls therefore can be made thinner than those of existing graphite racquets still being of the same strength or being stronger, which gives the racquet exceptional performance. In addition, the overall dimensions of, for example the cross-section, of the racquet can also be reduced while still maintaining performance characteristics.

A cord controlling device is used in conjunction with a game racket and is composed essentially of a housing formed of a base and an upper cover. The base is provided with a fastening portion by which the device is fastened with the head frame network of the game racket. The base is provided at the center of the upper side thereof with a shaft on which a rotary seat is rotatably mounted. The rotary seat is provided with a receiving chamber in which a volute spring is located such that the volute spring is fastened at one end thereof with the rotary, seat, and at other end thereof with the shaft of the base. A cord reel is mounted on the rotary seat for winding up or letting out a cord which is wound on the cord reel such that the cord is fastened at one end thereof with the cord reel, and that other end of the cord is let out via a cord outlet of the housing for fastening with a ball.

An accessory for rackets comprises means (1) for stable connection to a handle (M) of a racket (R) and contact means (2) for a user's hand (H), designed to identify the correct position of the hand (H) when gripping the racket (R) to perform strokes of a predetermined type, it being rigidly connectible the connecting means (1) and the contact means (2) to one another.

Rackets and a process that allows up to the entire length of a racket handle to receive various weight carriers enabling for selective control of overall weight, distribution of weight, balance point, swing weight, racket customization, and equalization between rackets are disclosed.

This invention discloses a system and device to rack pool balls more expeditiously and accurately. This is accomplished by supplying the triangular rack with a detachable bottom plate to form an enclosure to contain the balls. After the balls are contained in the enclosure, and said filled enclosure is on the pool table, the racker places the base of said filled triangular rack against the foot rail, then turns hand knobs located on top of said triangular rack which unlocks the bottom plate from said triangular rack; then proceeds to push said triangular rack with the contained balls forward with a rolling motion to the racking spot and off the bottom plate which is still abutted against the foot rail; then backs up said filled triangular rack against the front of said bottom plate for consistent, measured accuracy of the racking of pool balls.

The invention relates to a method for manufacturing a badminton racket, belonging to the technical field of manufacturing of the badminton racket. The method comprises a first step of making different foaming materials into foaming prefabricated bodies respectively, a second step of cutting each foaming prefabricated body into a filling core respectively and combining the filling cores according to a preset sequence, a third step of rolling the filling cores after the combination into a carbon fiber prepreg to prepare a prefabricated long strip, a fourth step of connecting the prefabricated long strip with a T-shaped joint which is connected to a middle pipe, and putting the prefabricated long strip and the T-shaped joint into a mold, heating and preserving heat to enable the prefabricated long strip to be solidified and molded into the badminton racket, and butting adjacent heated and foaming filling cores in the prefabricated long strip without a gap in the solidifying and molding process, and a final step of preparing the badminton racket. With the combination of the research of an applicant, the whole performance of the badminton racket is improved obviously as the segmental filling and foaming technology is adopted, different foaming materials are filled at different parts of the badminton racket, and collocation of partial performances of the badminton racket is optimized rationally; and the whole method is simple and easy.

The invention relates to a training badminton racket, belonging to the technical field of the application of the sensor IOT (Internet of Things). A lithium ion battery and an axis acceleration sensor are arranged in a hole in the bottom of a racket handle, and the lithium ion battery supplies power to the axis acceleration sensor via an electric lead. During badminton training, along with the movement of the training badminton racket, the axis acceleration sensor converts sensed movement information into an electric signal and transmits the electric signal via a transmitting antenna, and an information processor receives the information via a receiving antenna, processes the information according to a set program, stores processed information, and inputs the processed information into a display. Thus specific data about applied force and a racket angle when a player strikes a shuttlecock can be displayed on the display. The player can know the specific data about the applied force and the racket angle in the whole striking process, and can adjust the applied force and control the racket angle well while striking the shuttlecock more easily according to the specific data.

The invention provides a method for judging a serving violation in a badminton serving process by using a computer open-source vision library (OpenCV) as an identification means, and relates to the fields of image processing, artificial intelligence and the like, aiming at the problems of excessive subjectivity judgment of serving hands and waist violations in the badminton serving process in a badminton court. The method comprises the following steps: acquiring a video image frame sequence of an athlete during serving, and performing motion detection preprocessing to achieve the purpose of improving the system efficiency; The method comprises the following steps: establishing a badminton image data set, extracting LBP digital image features, carrying out classifier training, and determining the position of a badminton during serving; Calculating the positive and negative of the relative angle of the racket during serving by using OpenCV to judge whether serving is passed or not; And establishing a relation equation between the badminton top image point and the vertical foot image point, and calculating the terrain clearance of the serving point to judge whether the serving is over-waisted or not. The image processing technology is mainly applied to the badminton court, and the method has the advantages of being simple in detection and practical.

A central tube for the badminton racket with high rigidity, elasticity and directional stability is made up of carbon yarn and aeronautic Ti wire mesh through making basic tube with carbon yarns and uniformly sticking said aeronautic Ti wire mesh on the surface of said basic tube.

In a sports racquet, anchor points for a string are marked with indicia to assist a stringer in stringing from one anchor point to a next anchor point. In a preferred embodiment, one of the anchor points is a bearing assembly located within a hollow cavity in the racquet stem. Colored tubes are placed in the stem that lead to and from the bearing assembly, and the colors of the tubes match respective colored indicia associated with string holes in the frame head.

An automatic badminton launching device for physical education training is disclosed and comprises a mounting frame, the top of the mounting frame is arranged on a roof, a first cylinder is arranged below the mounting frame, a first telescopic rod is arranged in the first cylinder, a first pressure sensor is arranged on the first telescopic rod, a vibration mechanism is arranged on the ground, a second cylinder is arranged on the vibration mechanism, and a hopper is arranged on the second cylinder. A third cylinder is arranged in the second cylinder, a fourth sliding rail is arranged on the left of the vibration mechanism, a fourth sliding block is arranged in the fourth sliding rail, a supporting rod is arranged on the fourth sliding block, a connecting rod is arranged on the supporting rod, an angle swing mechanism is arranged on the connecting rod, a servo motor is arranged on the angle swing mechanism, a mounting rod is arranged on the servo motor, a first racket is arranged on themounting rod,according to the device, automatic control is achieved through the controller, an operator needs to control the strength, the shuttlecock is rebounded into the third cylinder through thefirst racket, the accuracy and strength of hitting the shuttlecock by the operator can be exercised, meanwhile, the shuttlecock picking frequency is reduced, the shuttlecock picking time is shortened, and shuttlecocks can be automatically loaded into the first cylinder.

The present invention relates to a method for manufacturing at least a portion of a sports racquet frame that comprises a step a) of providing a moldable tube structure containing a first inflatable bladder and a second inflatable bladder. The first and second inflatable bladders are positioned on opposite first and second regions of the moldable tube structure. At an intermediate region, the tube structure comprises one or more cross channels, which pass through the moldable tube structure. The method according to the present invention comprises also a further step b) of inserting said tube structure inside a mold forming a mold cavity of a desired shape. Mold members are inserted into the cross channels of the tube structure, so that the outer surface of the mold member faces the inner surface of the corresponding cross channel. The mold members have position and orientation that correspond to the position and orientation, along the string bed plane, of the string port holes, which are to be formed on said frame portion. The method, according to the present invention, comprises also a step c) of pressurizing the first and second bladders, so that the tube structure conforms to the shape of the mold, and heating the mold, so that the tube structure cures. The method, according to the present invention, comprises a further step d) of removing the cured tube structure from the mold cavity and removing the mold members from the cross channels.

The invention relates to linear high-energy plastic and a preparation method thereof. The linear high-energy plastic is prepared by immersing a linear supporting material into a heat-expandable composite resin material, wherein the heat-expandable composite resin material accounts for 10-70% of the total weight of the moulded linear high-energy plastic; the heat-expandable composite resin material comprises a hot-melt heat-expandable composite resin material and a solvent-based heat-expandable composite resin material. The linear high-energy plastic is applicable to moulding of a badminton racket, especially moulding of a middle tube of the badminton racket, the obtained badminton racket is plump in appearance and free of air bubbles therein, and the flexibility and the torque of the racket are taken into account; the preparation method is simple, low in cost and convenient in industrial application.

The invention provides a method and device for obtaining impact point spatio-temporal information. A low-cost and low-consumption sensor technology is utilized and combines an existing algorithm to obtain a space trajectory of racket actions, then an impact point moment and a corresponding space position are judged by calculating acceleration and angular acceleration change degree in a short time window, the hardware cost is not increased. The method is simple to achieve, and the technical problem that the space trajectory of a racket can be obtained by adopting a sensor-based identification technology and no means is provided to accurately determine a ball hitting point is surely solved.

According to one embodiment of the invention, a method for stringing a racket comprises inserting an end of a first string through a first grommet located along a frame of the racket, and re-inserting the end of the string through a second grommet. The second grommet is non-adjacent to the first grommet.

The invention relates to an intelligent table tennis bat which comprises a handle as well as a left base plate and a right base plate which are oppositely arranged on two sides of the handle, wherein a gap is formed between the left base plate and the right base plate; a circuit board is arranged inside the gap; a plurality of piezoelectric film sensors are uniformly adhered to the inner surfaces on one side, facing to the circuit board, of the left base plate and the right base plate; a main control MCU (Microprogrammed Control Unit), a signal conditioning circuit, a memory and a communication interface circuit are welded on the circuit board; the output ends of the piezoelectric film sensors are connected with the input end of the signal conditioning circuit; the output end of the signal conditioning circuit is connected with the input end of the main control MCU; the input end and output end of the main control MCU communicate with a host computer through the communication interface circuit. By adopting the intelligent table tennis bat, useful data information in a table tennis training process can be obtained, an objective data source is provided for improving the training quality in future, acquisition on force position, frequency and the like in hitting a ping-pong is achieved, and the intelligent table tennis bat has the characteristic of intelligence, and is low in power consumption and compact in structure.

The invention relates to a badminton racket. The badminton racket comprises a racket head and a racket rod, wherein the racket head comprises a racket frame and racket lines penetrating in the racket frame, the bottom of the racket frame is connected with the top of the racket rod through a connection part, the bottom of the racket rod is connected with a racket handle, and a plurality of air guiding grooves are formed at two sides of a position, close to the connection part, of the bottom of the racket frame along the longitudinal axis central line. The plurality of air guiding grooves do not affect the strength of the racket, are capable of effectively lowering the gravity center position of the badminton racket, and lowers the difficulty of swinging of the racket. Viridescent fluorescent powder is arranged on the racket lines of the badminton racket, is capable of indicating the position of the racket lines at night, and assists in accurate batting to improve the accuracy of batting. The badminton racket is made of special aluminum alloy, is good in batting feeling, good in vibration absorption, shuttlecock control and safety, and is suitable for being used by amateurs.

The invention provides a badminton spiking training device, which comprises a supporting frame, a badminton storage barrel, a batting racket, a rotating mechanism, a fan-shaped block, a pushing mechanism and a clamping mechanism, wherein the batting racket comprises a racket body and a racket rod, a shell is arranged between the racket rod and the racket body, and the shell is fixed to one end ofthe racket rod; the rotating mechanism is arranged in the shell, the output end of the rotating mechanism is connected with the racket body, and the rotating mechanism is used for driving the racket body to rotate around the racket rod; the fan-shaped block is fixed on the side wall of the supporting frame; the racket rod penetrates through the end part of a slot and is arranged on the supportingrod in a sleeving manner; the fan-shaped block is fixed on the supporting rod; the pushing mechanism is arranged on one side of the racket rod and used for pushing the racket rod to rotate around thesupporting rod; and the clamping mechanism is arranged on the supporting frame, located between the badminton storage barrel and the batting racket and used for clamping the badminton sliding out of abadminton outlet. The badminton spiking training device provided by the invention is suitable for being used in independent training, can simulate a real batting scene, and can also simulate a real racket swinging angle and a real racket swinging speed at the same time.

The invention discloses a tennis racket and badminton racket automatic string drawing machine. A racket frame is fixedly arranged on a fixed linear sliding table, the two sides of a racket are both provided with two sets of string drawing mechanisms, and the string drawing mechanisms are fixed on a first cross sliding table, a second cross sliding table, a third cross sliding table and a fourth cross sliding table respectively; the first cross sliding table and the second cross sliding table are arranged on the same racket face in parallel in the axial direction, and the third cross sliding table and the fourth cross sliding table are arranged on the same racket surface in parallel in the axial direction; the first cross sliding table, the second cross sliding table, the third cross sliding table and the fourth cross sliding table are each internally provided with a shaft perpendicular to the racket surface; the second cross sliding table and the third cross sliding table are parallel to the axis of the racket surface and are perpendicular to each other; the axes of the first cross sliding table, the second cross sliding table, the third cross sliding table and the fourth cross sliding table are parallel to or perpendicular to racket strings. According to the machine, the string drawing positions are selected on grids in the racket frame, the separation degree of the strings and the separation degree of the strings and the frame are large, the string selection efficiency is high, and the reliability is good.

A racket frame 10 of the present invention includes fiber reinforced resinous layers. At least one of the fiber reinforced resinous layers is a layer (L1) in which a rubber component is blended. A matrix of the layer (L1) contains a rubber component. When a total weight of a matrix contained in the racket frame 10 is defined as Wm (g) and a total weight of the rubber component contained in the frame 10 is defined as Wg (g), a rate Rg (%) of the total weight Wg to the total weight Wm is 2.5(%) or greater and 17.5(%) or less. In this frame 10, a ratio [Rh / Rs] of plane rigidity Rh to throat rigidity Rs is 0.05 or greater and 0.2 or less. Preferably, the plane rigidity Rh is 30 (kgf / cm) or greater and 70 (kgf / cm) or less. Preferably, the throat rigidity Rs is 250 (kgf / cm) or greater and 800 (kgf / cm) or less.

The invention discloses a return trajectory prediction method based on binocular vision perception of racket swinging and ball hitting actions. According to the method, the track of the racket beforebatting is used as an important basis for predicting the track of the shuttlecock, and the predicted time point is lifted from the time after the racket leaves the shuttlecock to the time before the racket touches the shuttlecock, so that more time is gained, and the quick response capability, batting point optimization capability, batting initiative and competitive level of the shuttlecock robotare improved. The method specifically comprises the following steps: 1, processing; first, a binocular camera is calibrated, denoising and distortion correction are carried out on the collected batting binocular image; identifying a motion area through a frame difference method; the shuttlecock and the racket are detected by using contour shape and area characteristics; eXTRACTING CORRESPONDING FEATURE POINTS, the method comprises the steps of matching binocular images according to an epipolar constraint principle, calculating parallax and depth of feature points, solving coordinates of the feature points, screening out off-site invalid moving targets according to boundary lines, calculating effective target motion parameters, taking the effective target motion parameters as neural networkinput for learning or prediction, and finally performing prediction calculation on medium and long term trajectories of return balls by utilizing Kalman filtering.

This core (2) for a racket string, in particular for a tennis racket string, comprises a thermoplastic matrix (24) in which filaments (22) are embedded, at least one of these filaments being of natural origin and the thermoplastic matrix (24) being made of a material which, at a temperature lower than a threshold temperature, at which the filaments (22) are not substantially damaged, has a viscosity making it suitable for an extrusion process. The matrix (24) comprises a plurality of strands that are helically twisted in a first direction, each of the strands comprising a plurality of filaments (22) of natural origin that are helically twisted in a second direction, which is or is not opposite to the first direction.

The invention discloses a finger and palmar metacarpal operating table tennis bat or same specie hand knocking bat, which is characterized by the following: comprising handle part and bat part; setting the bat part as knocking ball part and hold connecting part; setting the knocking part as face side and reverse side; setting the handle part as palm arc device; forming an angle with the palm arc device and bat knocking side; tilt-connecting with the hand hold connecting part; arranging on the side of reverse hand surface completely.