EP2195100B1 - Capteur de force pour une poignée de raquette - Google Patents

Capteur de force pour une poignée de raquette Download PDF

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Publication number
EP2195100B1
EP2195100B1 EP08835433.7A EP08835433A EP2195100B1 EP 2195100 B1 EP2195100 B1 EP 2195100B1 EP 08835433 A EP08835433 A EP 08835433A EP 2195100 B1 EP2195100 B1 EP 2195100B1
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EP
European Patent Office
Prior art keywords
handle
force
sensors
racket
player
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP08835433.7A
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German (de)
English (en)
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EP2195100A1 (fr
Inventor
Frank Exner
Ralf Schwenger
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Head Technology GmbH
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Head Technology GmbH
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Filing date
Publication date
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Publication of EP2195100A1 publication Critical patent/EP2195100A1/fr
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Classifications

    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B49/00—Stringed rackets, e.g. for tennis
    • A63B49/02—Frames
    • A63B49/08—Frames with special construction of the handle
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B53/00—Golf clubs
    • A63B53/14—Handles
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B60/00—Details or accessories of golf clubs, bats, rackets or the like
    • A63B60/06—Handles
    • A63B60/16—Caps; Ferrules
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B60/00—Details or accessories of golf clubs, bats, rackets or the like
    • A63B60/46—Measurement devices associated with golf clubs, bats, rackets or the like for measuring physical parameters relating to sporting activity, e.g. baseball bats with impact indicators or bracelets for measuring the golf swing
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B60/00—Details or accessories of golf clubs, bats, rackets or the like
    • A63B60/46—Measurement devices associated with golf clubs, bats, rackets or the like for measuring physical parameters relating to sporting activity, e.g. baseball bats with impact indicators or bracelets for measuring the golf swing
    • A63B2060/464—Means for indicating or measuring the pressure on the grip
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B71/00—Games or sports accessories not covered in groups A63B1/00 - A63B69/00
    • A63B71/06—Indicating or scoring devices for games or players, or for other sports activities
    • A63B71/0619—Displays, user interfaces and indicating devices, specially adapted for sport equipment, e.g. display mounted on treadmills
    • A63B71/0622—Visual, audio or audio-visual systems for entertaining, instructing or motivating the user
    • A63B2071/0625—Emitting sound, noise or music
    • A63B2071/0627—Emitting sound, noise or music when used improperly, e.g. by giving a warning
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B2220/00—Measuring of physical parameters relating to sporting activity
    • A63B2220/50—Force related parameters
    • A63B2220/51—Force
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B2220/00—Measuring of physical parameters relating to sporting activity
    • A63B2220/50—Force related parameters
    • A63B2220/56—Pressure
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B60/00—Details or accessories of golf clubs, bats, rackets or the like
    • A63B60/06—Handles
    • A63B60/14—Coverings specially adapted for handles, e.g. sleeves or ribbons

Definitions

  • the invention relates to a handle for a sports device, in particular for a tennis, squash, racquet, paddle tennis, badminton or golf racket, with a force measuring device attached to it.
  • the task of a player is to grasp a racket with the hand of his striking arm and to strike the striking face with a striking or resting ball. This should hit the club face optimally in order to transmit the impulse from the club to the ball. With an optimal shot, the striking surface should be guided in such a way that the ball strikes approximately in the area of the longitudinal axis of the racket. If, on the other hand, the ball gets into the outer area of the striking surface or possibly even onto the frame of the racket, this leads to significantly increased torques which have to be absorbed by the user's hand on the racket's handle.
  • the player has to counteract these additional forces by tightening the muscles of the hand of his striking arm in order to increase the holding force with which his hand encloses the handle.
  • Such an increased holding force can lead to incorrect loading of the arm muscles of the striking arm, which can result in tension or epicondylitis, up to chronic inflammation of the arm muscles, which are also known as tennis elbow or epicondylitis.
  • an important learning objective is that a practitioner learns to hit the ball within a suitable striking surface and to enclose the stick or its grip with a suitable holding force that depends on the constitution of the player .
  • the players who learned ball sports gripped the racket too tightly; the optimal holding force for fixing the racket should be trained.
  • a hand pressure sensor warning device which can be used in sports equipment.
  • This device is a relatively thin patch designed to be attached to the outside of handles.
  • the device consists of an electrical membrane switch, an electrical display with an alarm device and a housing.
  • a tennis racket is known in which a holding force measuring device is installed in the cavity of the handle, by means of which the holding force enclosing the handle can be determined. If the set limit of the holding force is exceeded, an acoustically perceptible signal is generated.
  • the disadvantage here is that the installation of the force measuring device in the handle of the known tennis racket requires special and complex processing. Depending on the design of the force measuring device, a split of the handle into two parts that can be put together again and a subsequent mechanical balancing of an unstable system, which is constructed from several tension springs, are required.
  • Retrofitting commercial rackets with the holding force measuring device according to the prior art is therefore at least extremely time-consuming and therefore costly.
  • the previously known solution can usually be used when a specially manufactured training tennis racket is to be used.
  • the holding force measuring device cannot be arbitrarily installed and removed in the racket in order to use it with or without the force measuring device, because the assembly is technically complicated.
  • the player Since the acoustic signal only arises at the time of the respective stroke, the player cannot determine a long-term change in the holding force applied, namely if the signal is only triggered when a limit value is exceeded.
  • the structural design of the holding force measuring device consists of a large number of components, in particular springs, and measuring sensors which are electrically connected to one another.
  • the assembly of such components is difficult and can only be carried out based on special expertise.
  • the present invention provides a handle for a sports device, in particular for a tennis, squash, racquet, paddle tennis, badminton or golf racket.
  • the handle has a force measuring device attached to it, which is suitable for measuring a force acting on the handle, which is applied by a player's hand enclosing the handle, the forces transmitted by individual fingers of the player hand being measured independently of one another can.
  • the handle has an electronic evaluation unit which is electrically connected to the force measuring device.
  • the force measuring device has a plurality of flat-shaped force sensors or measuring sensors which are placed in such a way that the corresponding fingers of the player's hand come to rest on the individual sensors when the sports device is gripped normally, and which are attached to the handle in such a way that those of the Force transmitted by the player's hand can be measured by the force sensors, the handle also having a grip shell and the force sensors being arranged under the grip shell.
  • the flat force or measurement sensors are attached to the handle in such a way that the force transmitted from the third, fourth and fifth fingers of the player's hand can be measured by the force sensors. It is particularly preferred that the forces transmitted by the individual fingers, in particular the third, fourth and fifth fingers, of the player's hand can each be measured independently of one another. This is possible, for example, by the force measuring device having a plurality of force sensors, e.g. B. three force sensors, which are placed such that the corresponding fingers of the player's hand come to rest during normal gripping of the sports equipment on the individual sensors.
  • the electronic evaluation unit is suitable for triggering an optical and / or acoustic signal. This can be triggered, for example, whenever a certain predefined force is exceeded, or if the force transmission of the individual fingers to the handle is uneven.
  • the measuring or force sensors each consist of two layers that are spatially separated from one another, for example by B. are separated by an intermediate element.
  • the one layer of the force sensors can be firmly connected to a surface of the handle and the intermediate element can be pressed apart by a pressure force exerted on the second layer, so that a switching contact is formed with the first layer when a certain preset threshold value is exceeded.
  • This intermediate element can optionally be exchangeable and have a certain predetermined limit value, by means of which it can be determined at which threshold value the first layer forms the switching contact with the second layer of the same force sensor.
  • the evaluation unit is suitable for generating a signal in the form of a force display of the measured pressure value.
  • the force applied for the last stroke can be displayed.
  • the evaluation unit can have a storage device, by means of which the force values determined by the force sensors can be temporarily or permanently stored and from which these measurement data can be called up visually.
  • the entire course of the measured force can be tracked during the session.
  • the forces applied in each case can also be tracked after a large number of clubs in order to be able to assess the progress of the training. This is further facilitated if the signal transmitter has an optical display unit, for example a numerical display or a red dot or bar scale, by means of which the respective value of the holding force is represented graphically.
  • the force sensors can preferably be arranged on a handle side that runs parallel to the striking surface of the racket, since the fingers of the hand usually rest on a side of the handle that is parallel to the plane of the striking surface.
  • This allows sufficient conclusions to be drawn as to whether the the ball to be struck has hit the center of the striking surface or outside the optimal target surface.
  • this can vary from sports equipment to sports equipment and essentially depends on how the respective grip is usually enclosed by the hand of the player.
  • the force sensors are preferably accommodated in one or more recesses in the handle.
  • the handle also preferably has a grip tape and the force sensors are arranged under this grip tape.
  • the sensors are protected on the one hand by the grip tape, which on the other hand is flexible enough that the force to be measured can be transmitted to the sensor.
  • the force sensors are preferably covered by the grip tape and fixed to the handle.
  • the handle also has a handle shell, under which the force sensors are arranged.
  • the handle particularly preferably has two handle half-shells, below which the force sensors are arranged.
  • the two handle half-shells are spaced apart and can be pressed together by the force exerted by the player's hand.
  • the two half-shells are by a force by means of a device such. B. a spring, pushed apart and only come into contact with each other when the force transmitted by the player is sufficiently large.
  • the force required for this is preferably less than 40 N and is particularly preferably in a range between 5 N and 20 N.
  • the evaluation unit is preferably electrically connected to a current source and the evaluation unit and the current source are arranged in a common housing which is attached to or in the handle.
  • the force sensors are preferably designed as strain gauges or as capacitive or inductive proximity sensors or as piezoelectric sensors.
  • a preferred example of a piezoelectric sensor is polyvinylidene fluoride (PVDF).
  • PVDF polyvinylidene fluoride
  • other force sensors can also be used.
  • the present application also relates to a sports device, in particular a tennis, squash, racquet, paddle tennis, badminton or golf racket with a handle as described above.
  • a device 1 can be removed by means of which the striking technique can be optimized for the use of a tennis racket 2.
  • the striking technique can be optimized for the use of a tennis racket 2.
  • it is of considerable importance to hit the approaching or resting ball in a certain optimal hit area 7 with the racket 2 in order to optimally transmit the impulse to be transmitted from the racket 2 to the Transfer the ball and move it in a certain direction. If the ball is hit outside the target area 7, then an additional torque arises, depending on the distance between the point of impact and the longitudinal axis 10 of the racket 2.
  • the racket 2 consists of a frame 3, on one end of which a handle 4 is attached, which has a cavity 5 and the other end of which is designed as an ellipse.
  • a covering 6 is provided between the frame 3, which serves as an overall hit area.
  • the hatched area of the covering 6, which extends along the longitudinal axis 10, represents the optimal target area 7, on which the ball should preferably strike, in order to optimally transmit the impact impulse generated by the striker 2 to the ball without the holding force to be used being unnecessary is increased.
  • the device 1 which consists of a force measuring device 11 and an evaluation unit 16.
  • the force measuring device 11 comprises a total of four force or measuring sensors 12, which according to FIGS 2 and 3 are mounted opposite one another on the surface 8 of the handle 4.
  • the measurement sensors 12 accordingly run parallel to the longitudinal axis 10 of the racket 2 and are consequently arranged to run parallel to the impact plane formed by the covering 6.
  • the player namely grips the handle 4 in such a way that the third, fourth and fifth fingers of his hand support the handle 4; the thumb and the index finger of the hand serve as a guide or as an abutment to the holding force exerted by the third, fourth and fifth fingers.
  • the holding force is consequently transmitted directly to the handle 4 by the third, fourth and fifth fingers of the hand.
  • the measurement sensors 12 are assigned exactly to the positions of the third, fourth and fifth fingers, in such a way that the racket 2 can be used as usual. Each pressure force exerted by these three fingers is thus detected by the measuring sensor 12 arranged in this position.
  • the determined force values are forwarded to the measuring unit 12 and the evaluation unit 16 via an electrical connection.
  • a memory unit can be assigned to the evaluation unit 16, by means of which the force measurement values determined in this way are collected and stored during a large number of blows to be carried out. After completing the training game, the measured values can be visualized on a display 18 in the form of numerical values or by means of bar displays. The player thus has a possibility of comparing the individual shots and the holding forces of the racket 2 that are used for this purpose.
  • the evaluation unit 16 can be equipped with a light emitting diode 19 and / or an acoustic signal transmitter, e.g. B. a horn 20, may be connected. If it is namely desired that a signal in visual and / or acoustic form should be present when a certain preset limit value of the holding force is exceeded, the light-emitting diode 19 or the horn 20 is activated by the evaluation unit 16, so that the player immediately after executing the respective stroke has a control option for the impact force.
  • a light emitting diode 19 and / or an acoustic signal transmitter e.g. B. a horn 20
  • the measuring sensor 12 consists of a plate integrated in the handle 4, which is inserted in a recess 22 machined in the handle, and of an upper plate movable in the direction of the lower plate of the measuring sensor 11. As soon as, for example, the upper plate of the measuring sensor 12 comes into contact with the lower plate against the force of a spring, a switching signal is produced which is stored or evaluated by the evaluation unit 16. At the same time, the distance between the two plates can also be detected by the evaluation unit 16.
  • the respective distances between the two plates of the measuring sensor 12 relate to the holding force acting on the handle 4. The closer the plates are pressed together by the holding force of the player, the greater the holding force that is applied.
  • the outer plate of the measuring sensor 12 is fixed on the handle 4 by means of a grip tape 9. Since the grip tape 9 is usually designed to be elastic, the holding forces acting on it are transmitted directly to the measuring sensor 12.
  • the evaluation unit 16 together with a power supply unit, for. B. an accumulator 17 is housed in a housing 21.
  • the geometric dimensions of the housing 21 are designed such that it is inserted into the cavity 5 of the handle 4 and locked in it. The housing 21 can therefore be easily removed from the racket 2, so that the racket 2 can be used for tournament and training purposes at the same time.
  • the measurement sensors 12 each consist of a first layer 13 and a second layer 14, which are arranged one above the other in alignment.
  • the first layer 13 is, for example attached to the surface 8 of the handle 4 by means of an adhesive.
  • the outwardly facing surface of the first layer 13 is designed in a wave shape.
  • An intermediate element 15 is provided between the first and second layers 13 and 14. These can be, for example, individual liquid drops enclosed in separate shells, which are pressed apart by the holding force acting on the second layer 14, so that a switching contact in the form of a contact is formed in some areas between the first and the second layer 13, 14.
  • the intermediate element 15 can be replaced and has different densities of liquid drops, by means of which the degree of hardness of the intermediate element 15 can accordingly be changed. Depending on how many drops of liquid are present, which form the intermediate element 15, a greater compressive force, which acts on the second layer 14, is necessary in order to push the drops of the intermediate element 15 apart and consequently to effect the switching contact with the first layer 13 .
  • the first layer 13 is placed directly on the surface 8 of the handle 4; An additional manual measure for fastening the measuring sensor 11 is not necessary for this embodiment variant, as a result of which the assembly and disassembly is considerably simplified.
  • the evaluation unit 12 and the current source 17, together with the housing shell 21 supporting them, can also be arranged between the striking surface 6 and the handle 4 in the V-shaped frame 6, as is the case here Fig. 1 can be removed.
  • the handle 4 consists of two handle half-shells 4a and 4b and an inner handle shaft or handle core 4c.
  • the two handle half-shells 4a and 4b enclose the handle core 4c, whereby they preferably contact it in a force-locking manner.
  • a sensor film which serves as a force sensor 12, is attached between the handle half-shells 4a, 4b and the handle core 4c and preferably on the handle core 4c.
  • the sensor film 12 has polyvinylidene fluoride on. Basically, however, all known materials that are suitable for force measurement can be considered for the sensor film 12.
  • the handle 4 preferably has two sensor foils 12, one sensor foil being attached between the handle core 4c and the upper handle half-shell 4b and a further sensor foil between the handle core 4c and the lower handle half-shell 4a. Even if the sensor film 12 in Fig. 5a is attached to the handle core 4c, it can alternatively be attached to the handle half-shells 4a and 4b.
  • the two handle half-shells 4a and 4b are preferably spaced apart from one another and can be pressed together or pressed together by the force transmitted by the player.
  • a spring element is attached between the two handle half-shells.
  • Fig. 5a is in Fig. 5b shown.
  • Fig. 5b are the individual parts of the Fig. 5a to see put together.
  • an intermediate space or gap 30 is created between the half-shells of the handle.
  • a spring element for example a rubber layer, is preferably introduced into this. In this way, the handle half-shells 4a and 4b can be pressed against one another against the elastic restoring force of the rubber layer, a force being exerted on the sensor film (s) 12.
  • the material of the rubber layer or of the elastomer between the half-shells of the handle is preferably selected such that a predetermined force is required to compress the grip shells sufficiently that the sensor film (s) registers a force.
  • the predetermined force is preferably less than 40 N, preferably between 5 and 20 N.

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Force Measurement Appropriate To Specific Purposes (AREA)
  • Golf Clubs (AREA)

Claims (13)

  1. Poignée (4) pour un instrument de sport (2) avec
    un dispositif de mesure de force (11) apposé sur la poignée (4) qui est approprié pour mesurer une force appliquée sur la poignée (4) qui est apportée par une main d'un joueur enserrant la poignée (4), dans laquelle les forces transmises par les doigts individuels de la main du joueur peuvent être respectivement mesurées indépendamment les unes des autres ; et
    une unité d'analyse (16) électronique qui est électriquement reliée au dispositif de mesure de force (11) ;
    dans laquelle le dispositif de mesure de force (11) présente plusieurs capteurs de force (12) plats qui sont placés de telle sorte que les doigts correspondants de la main du joueur en viennent à reposer sur les capteurs individuels lors d'une préhension normale de l'instrument de sport, et qui sont apposés de telle sorte sur la poignée (4) que la force transmise par la main du joueur peut être mesurée par les capteurs de force (12), dans laquelle la poignée présente en outre une coque de poignée (4a, 4b) et les capteurs de force (12) sont agencés sous la coque de poignée (4a, 4b).
  2. Poignée selon la revendication 1, dans laquelle l'unité d'analyse (16) électronique est appropriée pour déclencher un signal optique et/ou acoustique.
  3. Poignée selon l'une des revendications précédentes, dans laquelle l'unité d'analyse (16) est appropriée pour produire un signal sous la forme d'un indicateur de force de la valeur de pression mesurée.
  4. Poignée selon l'une des revendications précédentes, dans laquelle les capteurs de force (12) sont agencés sur un côté de poignée qui se déroule parallèlement à la surface de frappe (6) de la raquette (2).
  5. Poignée selon l'une des revendications précédentes, dans laquelle la poignée (4) présente un ou plusieurs évidements (22) dans lequel ou lesquels le capteur de force (12) respectif peut être inséré.
  6. Poignée selon la revendication 5, dans laquelle l'unité d'analyse (16) est électriquement reliée à une source de courant (17), et l'unité d'analyse (16) et la source de courant (17) sont agencées dans un logement (21) commun qui est apposé sur ou dans la poignée (4).
  7. Poignée selon l'une des revendications précédentes, dans laquelle l'unité d'analyse (16) présente un dispositif de mémoire au moyen duquel les valeurs de force saisies par les capteurs de force (12) peuvent être mémorisées temporairement ou en permanence et depuis lequel ces données de mesure peuvent être visuellement consultées.
  8. Poignée selon l'une des revendications précédentes, dans laquelle les capteurs de force (12) sont conçus en tant que jauges de contrainte ou en tant que capteurs de proximité capacitifs ou inductifs.
  9. Poignée selon l'une des revendications précédentes, dans laquelle la poignée présente deux demi-coques de poignée et un capteur de force (12) est agencé sous chacune des demi-coques de poignée.
  10. Poignée selon la revendication 9, dans laquelle les deux demi-coques de poignée sont espacées l'une de l'autre et peuvent être pressées l'une contre l'autre par la force apportée par la main du joueur.
  11. Poignée selon l'une des revendications précédentes, dans laquelle le dispositif de mesure de force (11) est approprié pour mesurer respectivement indépendamment les unes des autres les forces transmises par le troisième, quatrième et cinquième doigt de la main du joueur.
  12. Poignée selon l'une des revendications précédentes, dans laquelle le dispositif de mesure de force (11) présente trois capteurs.
  13. Instrument de sport, en particulier raquette de tennis, de squash, de raquette, de paddle-tennis, de badminton ou club de golf, avec une poignée selon l'une des revendications 1 à 12.
EP08835433.7A 2007-09-28 2008-09-26 Capteur de force pour une poignée de raquette Active EP2195100B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE202007013632U DE202007013632U1 (de) 2007-09-28 2007-09-28 Vorrichtung zur Optimierung der Schlagtechnik für Ballspiele
PCT/EP2008/008231 WO2009043558A1 (fr) 2007-09-28 2008-09-26 Capteur de force pour manche de raquette

Publications (2)

Publication Number Publication Date
EP2195100A1 EP2195100A1 (fr) 2010-06-16
EP2195100B1 true EP2195100B1 (fr) 2020-04-01

Family

ID=38806493

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08835433.7A Active EP2195100B1 (fr) 2007-09-28 2008-09-26 Capteur de force pour une poignée de raquette

Country Status (4)

Country Link
EP (1) EP2195100B1 (fr)
DE (1) DE202007013632U1 (fr)
ES (1) ES2790592T3 (fr)
WO (1) WO2009043558A1 (fr)

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DE202023101325U1 (de) 2023-03-16 2023-04-06 Uwe Pfeiffer Schläger für Ballspielsportarten mit flexibler Gewichtseinstellung

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EP2195100A1 (fr) 2010-06-16
ES2790592T3 (es) 2020-10-28

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