EP2195100B1 - Force sensor for racquet handle - Google Patents
Force sensor for racquet handle Download PDFInfo
- 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.)
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- 238000011156 evaluation Methods 0.000 claims description 21
- 238000005259 measurement Methods 0.000 claims description 13
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- 235000020354 squash Nutrition 0.000 claims description 6
- 230000003287 optical effect Effects 0.000 claims description 3
- 230000001939 inductive effect Effects 0.000 claims description 2
- 210000003811 finger Anatomy 0.000 description 15
- 238000012549 training Methods 0.000 description 6
- 229920001971 elastomer Polymers 0.000 description 4
- 239000002033 PVDF binder Substances 0.000 description 3
- 239000011888 foil Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 210000003205 muscle Anatomy 0.000 description 3
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 3
- 201000011275 Epicondylitis Diseases 0.000 description 2
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- 208000037976 chronic inflammation Diseases 0.000 description 1
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- 239000000806 elastomer Substances 0.000 description 1
- 230000001976 improved effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
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Images
Classifications
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- 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)
Description
Die Erfindung bezieht sich auf einen Griff für ein Sportgerät, insbesondere für einen Tennis-, Squash-, Raquet-, Paddletennis-, Badminton- oder Golfschläger, mit einer daran angebrachten Kraftmesseinrichtung.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.
Beim Tennis sowie bei ähnlichen Ballsportarten, beispielsweise Golf, Badminton oder Squash, besteht die Aufgabe eines Spielers darin, mit der Hand seines Schlagarms einen Schläger zu umfassen und diesen mit der Schlagfläche gegen einen anfliegenden oder ruhenden Ball zu schlagen. Dieser soll dabei optimal auf die Schlagfläche des Schlägers auftreffen, um den Schlagimpuls von dem Schläger auf den Ball zu übertragen. Bei einem optimalen Schlag sollte die Schlagfläche dabei derart geführt werden, dass der Ball etwa im Bereich der Längsachse des Schlägers auftrifft. Gelangt der Ball dagegen in den Außenbereich der Schlagfläche oder möglicherweise sogar auf den Rahmen des Schlägers, so führt dies zu deutlich erhöhten Drehmomenten, die am Griff des Schlägers von der Hand des Benutzers aufzunehmen sind.In tennis and similar ball sports, such as golf, badminton or squash, 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.
Diesen zusätzlichen Kräften muss der Spieler dadurch entgegenwirken, dass die Muskeln der Hand seines Schlagarms stärker anzuspannen sind, um die Haltekraft, mit der seine Hand den Griff umschließt, zu erhöhen. Eine solche gesteigerte Haltekraft kann zu einer Fehlbelastung der Armmuskulatur des Schlagarms führen, wodurch Verspannungen oder Epicondylitis, bis hin zu chronischen Entzündungen der Armmuskulatur, die auch als Tennisarm oder Epicondylitis bezeichnet werden, als Folge eintreten können.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.
Im Rahmen einer Schulung zur Verbesserung der Schlagtechnik besteht daher ein wichtiges Lernziel darin, dass ein Übender erlernt, den Ball innerhalb einer geeigneten Schlagfläche zu treffen und dabei den Schläger beziehungsweise dessen Griff mit einer geeigneten Haltekraft zu umschließen, die individuell von der Konstitution des Spielers abhängt. Insbesondere die den Ballsport erlernenden Spieler umgreifen den Schläger zu fest; diesen soll die optimale Haltekraft zur Fixierung des Schlägers antrainiert werden.In the context of a training to improve the striking technique, 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 . In particular, the players who learned ball sports gripped the racket too tightly; the optimal holding force for fixing the racket should be trained.
Aus der
Aus der
Nachteilig ist dabei jedoch, dass der Einbau der Kraftmesseinrichtung in den Griff des bekannten Tennisschlägers eine spezielle und aufwändige Bearbeitung erfordert. So ist je nach Ausführung der Kraftmesseinrichtung eine Spaltung des Griffes in zwei erneut zusammenfügbare Teile sowie eine nachfolgende mechanische Austarierung eines labilen Systems, das aus mehreren Spannfedern aufgebaut ist, erforderlich.The disadvantage here, however, 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.
Ein Nachrüsten handelsüblicher Schläger mit der Haltekraftmesseinrichtung nach dem Stand der Technik ist daher zumindest äußerst zeitintensiv und daher kostenaufwendig. Die bisher bekannte Lösung kann üblicherweise dann Verwendung finden, wenn ein vorab speziell hergestellter Trainings-Tennisschläger eingesetzt werden soll. Die Haltekraftmesseinrichtung kann in den Schläger nicht beliebig ein- und ausgebaut werden, um diesen mit oder ohne der Kraftmesseinrichtung zu verwenden, denn die Montage ist technisch kompliziert.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.
Da das akustische Signal lediglich zum Zeitpunkt des jeweiligen Schlages entsteht, kann der Spieler eine langfristige Veränderung der aufgewandten Haltekraft nicht feststellen, wenn nämlich das Signal lediglich beim Überschreiten eines Grenzwertes ausgelöst wird.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.
Der konstruktive Aufbau der Haltekraftmesseinrichtung nach dem Stand der Technik besteht aus einer Vielzahl von Bauteilen, insbesondere aus Federn, und Messgebern, die elektrisch miteinander verbunden sind. Die Montage solcher Bauteile ist schwierig und kann ausschließlich aufgrund besonderer Fachkenntnisse vorgenommen werden.The structural design of the holding force measuring device according to the prior art 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.
Es ist daher eine Aufgabe der Erfindung, einen verbesserten Griff für ein Sportgerät bereitzustellen, durch den während des Spielens mit dem Sportgerät die Schlagtechnik optimierbar ist.It is therefore an object of the invention to provide an improved grip for sports equipment To provide, through which the striking technique can be optimized while playing with the sports equipment.
Diese Aufgabe wird erfindungsgemäß durch die Merkmale der Ansprüche gelöst.According to the invention, this object is achieved by the features of the claims.
Die vorliegende Erfindung stellt einen Griff für ein Sportgerät, insbesondere für einen Tennis-, Squash-, Raquet-, Paddletennis-, Badminton- oder Golfschläger, bereit. Der Griff weist eine an diesem angebrachte Kraftmesseinrichtung auf, die dazu geeignet ist, eine auf den Griff einwirkende Kraft zu messen, die von einer den Griff umschließenden Hand eines Spielers aufgebracht wird, wobei die von einzelnen Fingern der Spielerhand übertragenen Kräfte jeweils unabhängig voneinander gemessen werden können. Ferner weist der Griff eine elektronische Auswerteeinheit auf, die elektrisch mit der Kraftmesseinrichtung verbunden ist. Dabei weist die Kraftmesseinrichtung mehrere flach ausgebildete Kraftsensoren bzw. Messsensoren auf, die derart platziert sind, dass die entsprechenden Finger der Spielerhand bei einem normalen Greifen des Sportgeräts auf die einzelnen Sensoren zu liegen kommen, und die am Griff derart angebracht sind, dass die von der Spielerhand übertragene Kraft von den Kraftsensoren gemessen werden kann, wobei der Griff ferner eine Griffschale aufweist und die Kraftsensoren unter der Griffschale angeordnet sind.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. Furthermore, 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.
Gemäß einer bevorzugten Ausführungsform sind die flach ausgebildeten Kraft- bzw. Messsensoren derart am Griff angebracht, dass die vom dritten, vierten und fünften Finger der Spielerhand übertragene Kraft von den Kraftsensoren gemessen werden kann. Dabei ist es besonders bevorzugt, dass die von den einzelnen Fingern, insbesondere vom dritten, vierten und fünften Finger, der Spielerhand übertragenen Kräfte jeweils unabhängig voneinander gemessen werden können. Dies ist beispielsweise dadurch möglich, dass die Kraftmesseinrichtung mehrere Kraftsensoren, z. B. drei Kraftsensoren, aufweist, die derart platziert sind, dass die entsprechenden Finger der Spielerhand bei einem normalen Greifen des Sportgerätes auf die einzelnen Sensoren zu liegen kommen.According to a preferred embodiment, 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.
Gemäß einer weiteren bevorzugten Ausführungsform ist die elektronische Auswerteeinheit dazu geeignet, ein optisches und/oder akustisches Signal auszulösen. Dies kann beispielsweise immer dann ausgelöst werden, wenn eine bestimmte vordefinierte Kraft überschritten wird, oder wenn die Kraftübertragung der einzelnen Finger auf den Griff ungleichmäßig erfolgt.According to a further preferred embodiment, 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.
Es ist ferner bevorzugt, dass die Mess- bzw. Kraftsensoren aus jeweils zwei Schichten bestehen, die räumlich voneinander, z. B. durch ein Zwischenelement, getrennt sind. Dabei kann die eine Schicht der Kraftsensoren mit einer Oberfläche des Griffes fest verbunden sein und das Zwischenelement durch eine auf die zweite Schicht ausgeübte Druckkraft auseinanderdrückbar sein, so dass sich bei Überschreiten eines bestimmten voreinstellbaren Schwellwertes mit der ersten Schicht ein Schaltkontakt bildet. Dieses Zwischenelement kann wahlweise auswechselbar sein und einen bestimmten vorgegebenen Grenzwert aufweisen, durch den festlegbar ist, bei welchem Schwellwert die erste Schicht mit der zweiten Schicht desselben Kraftsensors den Schaltkontakt bildet.It is further preferred that 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.
Gemäß einer weiteren bevorzugten Ausführungsform ist die Auswerteeinheit dazu geeignet, ein Signal in Form einer Kraftanzeige des gemessenen Druckwertes zu generieren. So kann beispielsweise jeweils die für den letzten Schlag aufgebrachte Kraft angezeigt werden. Alternativ oder zusätzlich kann die Auswerteeinheit eine Speichereinrichtung aufweisen, mittels derer die von den Kraftsensoren ermittelten Kraftwerte zeitweise oder permanent abgespeichert werden können und von der diese Messdaten visuell abrufbar sind. So lässt sich etwa nach einer Trainingseinheit der gesamte Verlauf der gemessenen Kraft während der Einheit nachvollziehen. Dadurch können beispielsweise auch im Nachgang zu einer Vielzahl von Schlägern die jeweils aufgebrachten Kräfte nachvollzogen werden, um den Trainingsfortschritt beurteilen zu können. Dies wird weiter erleichtert, wenn der Signalgeber eine optische Anzeigeeinheit aufweist, beispielsweise ein numerisches Display oder eine Leuchtpunkt- oder Balkenskala, durch die der jeweilige Wert der Haltekraft graphisch wiedergegeben wird.According to a further preferred embodiment, the evaluation unit is suitable for generating a signal in the form of a force display of the measured pressure value. For example, the force applied for the last stroke can be displayed. Alternatively or additionally, 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. After a training session, for example, the entire course of the measured force can be tracked during the session. As a result, 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.
Die Kraftsensoren können bevorzugt auf einer Griffseite angeordnet sein, die parallel zu der Schlagfläche des Schlägers verläuft, da die Finger der Hand üblicherweise auf einer zur Ebene der Schlagfläche parallelen Seite des Griffes anliegen. Dadurch ist es auf einfache Weise möglich, die durch die Finger der Hand aufgebrachte Haltekraft unmittelbar zu erfassen und somit auch wesentliche Informationen hinsichtlich der ausgeübten Kraft für den jeweiligen ausgeführten Schlag abzuleiten. Dies erlaubt hinreichende Rückschlüsse, ob der zu schlagende Ball in der Mitte der Schlagfläche oder außerhalb der optimalen Trefferfläche aufgetroffen ist. Dies kann aber von Sportgerät zu Sportgerät variieren und hängt im Wesentlichen davon ab, wie der jeweilige Griff üblicherweise von der Hand des Spielers umschlossen wird.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. As a result, it is possible in a simple manner to directly record the holding force applied by the fingers of the hand and thus also to derive essential information regarding the force exerted for the respective blow performed. 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. However, 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.
Die Kraftsensoren sind bevorzugt in einer oder mehreren Ausnehmungen im Griff untergebracht. Der Griff weist ferner bevorzugt ein Griffband auf und die Kraftsensoren sind unter diesem Griffband angeordnet. Dadurch sind die Sensoren zum einen durch das Griffband geschützt, welches andererseits flexibel genug ist, dass die zu messende Kraft auf den Sensor übertragen werden kann. Bevorzugt sind die Kraftsensoren durch das Griffband abgedeckt und an den Griff fixiert.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. As a result, 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.
Erfindungsgemäß weist der Griff ferner eine Griffschale auf, unter der die Kraftsensoren angeordnet sind. Besonders bevorzugt weist der Griff alternativ zwei Griff-Halbschalen auf, unter denen die Kraftsensoren angeordnet sind. Dabei sind die beiden Griff-Halbschalen voneinander beabstandet und können durch die von der Hand des Spielers aufgebrachte Kraft aneinander gedrückt werden. Die beiden Halbschalen werden durch eine Kraft mittels einer Einrichtung, wie z. B. einer Feder, auseinandergedrückt und treten nur in Kontakt miteinander, wenn die vom Spieler übertragene Kraft ausreichend groß ist. Die hierfür nötige Kraft ist vorzugsweise kleiner als 40 N und liegt besonders bevorzugt in einem Bereich zwischen 5 N und 20 N.According to the invention, the handle also has a handle shell, under which the force sensors are arranged. Alternatively, 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.
Die Auswerteeinheit ist bevorzugt mit einer Stromquelle elektrisch verbunden und die Auswerteeinheit und die Stromquelle in einem gemeinsamen Gehäuse angeordnet, das an oder in dem Griff angebracht ist.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.
Die Kraftsensoren sind bevorzugt als Dehnungsmessstreifen oder als kapazitive oder induktive Näherungssensoren oder als piezoelektrische Sensoren ausgebildet. Ein bevorzugtes Beispiel für einen piezoelektrischen Sensor ist Polyvinylidenfluorid (PVDF). Es können aber auch andere Kraftsensoren zum Einsatz kommen.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). However, other force sensors can also be used.
Die vorliegende Anmeldung bezieht sich ferner auf ein Sportgerät, insbesondere einen Tennis-, Squash-, Raquet-, Paddletennis-, Badminton- oder Golfschläger, mit einem Griff wie oben beschrieben.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.
Anhand der Figuren sollen bevorzugte Ausführungsformen der Erfindung nachfolgend näher erläutert werden. Im Einzelnen zeigen:
-
Fig. 1 einen Tennis-Schläger mit einer an dessen Griff angebrachten Kraftmesseinrichtung, die aus vier Messsensoren besteht, durch die die am Griff einwirkende Haltekraft ermittelbar ist, in Draufsicht, -
Fig. 2 eine vergrößerte Darstellung des Griffes gemäßFig. 1 , -
Fig. 3 den Griff gemäßFig. 2 entlang der Schnittlinie III-III, -
Fig. 4 eine vergrößerte Darstellung des Griffes mit einem an diesem abgestützten Messsensor in einer andersartigen Ausführungsvariante, -
Fig. 5a eine bevorzugte Ausführungsform des erfindungsgemäßen Griffes in perspektivischer Einzelteilansicht, und -
Fig. 5b eine Variante der Ausführungsform ausFig. 5a in perspektivischer Ansicht.
-
Fig. 1 a top view of a tennis racket with a force measuring device attached to its handle, which consists of four measuring sensors, by means of which the holding force acting on the handle can be determined, -
Fig. 2 an enlarged view of the handle accordingFig. 1 , -
Fig. 3 the handle according toFig. 2 along the section line III-III, -
Fig. 4 3 shows an enlarged representation of the handle with a measuring sensor supported on it in a different embodiment, -
Fig. 5a a preferred embodiment of the handle according to the invention in perspective view of individual parts, and -
Fig. 5b a variant of the embodimentFig. 5a in perspective view.
Aus
Die nachfolgenden Ausführungen beziehen sich zwar auf einen Tennis-Schläger 2. Jede andere Ausgestaltung eines Schlägers 2 für eine bestimmte Ballsportart kann mit der erfindungsgemäßen Vorrichtung 1 bzw. dem erfindungsgemäßen Griff ebenso ausgestattet sein.The following explanations relate to a
Der Schläger 2 besteht aus einem Rahmen 3, an dessen einen Stirnseite ein Griff 4 angebracht ist, der einen Hohlraum 5 aufweist und dessen andere Stirnseite als Ellipse ausgestaltet ist. Im Bereich der Ellipse ist zwischen dem Rahmen 3 eine Bespannung 6 vorgesehen, die insgesamt als Trefferfläche dient. Die sich entlang der Längsachse 10 erstreckende schraffierte Fläche der Bespannung 6 stellt den optimale Trefferbereich 7 dar, auf den vorzugsweise der Ball auftreffen soll, um den vom Schläger 2 erzeugten SchlagImpuls optimal auf den Ball zu übertragen, ohne dass die aufzuwendende Haltekraft unnötig erhöht ist.The
Wenn der Ball außerhalb des optimalen Trefferbereichs 7 auf die Bespannung 6 oder gar den Rahmen 3 auftrifft, entsteht ein zusätzliches Drehmoment, das von dem Spieler mittels einer zusätzlich aufzubringenden Haltekraft, die auf den Griff 4 einwirkt, abzustützen ist. Um diese zusätzliche Haltekraft zu ermitteln, ist die erfindungsgemäße Vorrichtung 1 vorgesehen, die aus einer Kraftmesseinrichtung 11 und einer Auswerteeinheit 16 besteht. Die Kraftmesseinrichtung 11 umfasst dabei im gezeigten Ausführungsbeispiel insgesamt vier Kraft- bzw. Messsensoren 12, die gemäß den
Die Messsensoren 12 verlaufen demnach parallel zu der Längsachse 10 des Schlägers 2 und sind folglich zu der von der Bespannung 6 gebildeten Schlag-Ebene parallel verlaufend angeordnet. Der Spieler umgreift nämlich den Griff 4 derart, dass der dritte, vierte und fünfte Finger seiner Hand den Griff 4 abstützt; der Daumen und der Zeigefinger der Hand dienen zur Führung bzw. als Widerlager zu der von dem dritten, vierten und fünften Finger aufgewandten Haltekraft.The
Die Haltekraft wird folglich unmittelbar durch den dritten, vierten und fünften Finger der Hand auf den Griff 4 übertragen. Um diese Krafteinleitung auf den Griff 4 optimal ermitteln zu können, sind die Messsensoren 12 exakt den Positionen des dritten, vierten und fünften Fingers zugeordnet, und zwar derart, dass der Schläger 2 wie üblich verwendbar ist. Jede von diesen drei Fingern aufgewandte Druckkraft wird somit durch den in dieser Position angeordneten Messsensor 12 erfasst. Die ermittelten Kraftwerte werden über eine elektrische Verbindung zwischen dem Messsensor 12 und der Auswerteeinheit 16 an diese weitergeleitet.The holding force is consequently transmitted directly to the
Der Auswerteeinheit 16 kann eine Speichereinheit zugeordnet werden, durch die die derart ermittelten Kraftmesswerte während einer Vielzahl von auszuführenden Schlägen gesammelt und gespeichert werden. Nach Abschluss des Trainingsspieles können die Messwerte auf einem Display 18 in Form von Zahlenwerten oder mittels Balkendarstellungen visualisiert werden. Der Spieler erhält somit eine Vergleichsmöglichkeit zwischen den einzelnen Schlägen und den dazu aufgewandten Haltekräften des Schlägers 2.A memory unit can be assigned to the
Des Weiteren kann die Auswerteeinheit 16 mit einer Leuchtdiode 19 und/oder einem akustischen Signalgeber, z. B. einer Hupe 20, verbunden sein. Wenn nämlich gewünscht wird, dass bei Überschreiten eines bestimmten voreingestellten Grenzwertes der Haltekraft ein Signal in visueller und/oder akustischer Form vorliegen soll, wird die Leuchtdiode 19 oder die Hupe 20 durch die Auswerteeinheit 16 aktiviert, so dass der Spieler unmittelbar nach Ausführen des jeweiligen Schlages eine Kontrollmöglichkeit für die eingesetzte Schlagkraft.besitzt.Furthermore, the
In den
Des Weiteren ist vorgesehen, dass die Auswerteeinheit 16 zusammen mit einer Stromversorgungseinheit, z. B. einem Akkumulator 17, in einem Gehäuse 21 untergebracht ist. Die geometrischen Abmessungen des Gehäuses 21 sind derart ausgestaltet, dass dieses in den Hohlraum 5 des Griffes 4 eingesteckt und in diesem arretiert ist. Das Gehäuse 21 kann demnach ohne weiteres auf einfache Art und Weise von dem Schläger 2 entfernt werden, so dass der Schläger 2 gleichzeitig für Turnier- und Trainingszwecke einsetzbar ist.Furthermore, it is provided that the
In
Die erste Schicht 13 ist unmittelbar auf der Oberfläche 8 des Griffes 4 aufgesetzt; eine zusätzliche handwerkliche Maßnahme zur Befestigung des Messsensors 11 ist für diese Ausführungsvariante nicht notwendig, wodurch die Montage und Demontage erheblich vereinfacht ist.The
Die Auswerteeinheit 12 und die Stromquelle 17 können zusammen mit dem diese abstützenden Gehäuseschale 21 auch zwischen der Schlagfläche 6 und dem Griff 4 in dem V-förmig ausgestalteten Rahmen 6 angeordnet sein, wie dies
In
Gemäß einer bevorzugten Ausführungsform weist die Sensorfolie 12 Polyvinylidenfluorid auf. Grundsätzlich kommen aber für die Sensorfolie 12 sämtliche bekannte Materialien in Betracht, die für eine Kraftmessung geeignet sind.According to a preferred embodiment, the
Es kann nur eine Sensorfolie 12 zwischen dem Griffkern 4c und der oberen Griff-Halbschale 4b vorgesehen sein. Bevorzugt weist der Griff 4 allerdings zwei Sensorfolien 12 auf, wobei eine Sensorfolie zwischen dem Griffkern 4c und der oberen Griff-Halbschale 4b und eine weitere Sensorfolie zwischen dem Griffkern 4c und der unteren Griff-Halbschale 4a angebracht ist. Auch wenn die Sensorfolie 12 in
Dabei sind im fertig montierten Griff 4 die beiden Griff-Halbschalen 4a und 4b vorzugsweise voneinander beabstandet und können durch die vom Spieler übertragene Kraft aneinander- bzw. aufeinandergedrückt werden.In the
Es ist ferner bevorzugt, dass zwischen den beiden Griff-Halbschalen ein Federelement angebracht ist. Eine solche bevorzugte Variante der Ausführungsform aus
Das Material der Gummilage bzw. des Elastomers zwischen den Griff-Halbschalen ist dabei vorzugsweise so gewählt, dass eine vorbestimmte Kraft nötig ist, um die Griffschalen hinreichend weit zusammenzupressen, dass die Sensorfolie(n) eine Kraft registriert. Die vorbestimmte Kraft ist dabei vorzugsweise kleiner als 40 N, bevorzugt zwischen 5 und 20 N.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.
Claims (13)
- Handle (4) for a sports equipment (2), comprising
a force measurement device (11) which is attached to the handle (4) and which is suitable for measuring a force acting on the handle (4) which is applied by a hand of a player enclosing the handle (4), wherein the forces transmitted by individual fingers of the hand of the player can each be measured independently of one another; and
an electronic evaluation unit (16) which is electrically connected to the force measurement device (11);
wherein the force measurement device (11) comprises multiple force sensors (12) of flat configuration which are positioned in such a way that the respective fingers of the hand of the player come to lie on the individual sensors when the sports equipment is gripped normally, and which are attached to the handle (4) in such a way that the force transmitted by the hand of the player can be measured by the force sensors (12), wherein the handle further comprises a handle shell (4a, 4b) and the force sensors (12) are arranged below the handle shell (4a, 4b). - Handle according to claim 1, wherein the electronic evaluation unit (16) is suitable for triggering an optical and/or acoustic signal.
- Handle according to any one of the preceding claims, wherein the evaluation unit (16) is suitable for generating a signal in the form of a force indicator of the measured pressure value.
- Handle according to any one of the preceding claims, wherein the force sensors (12) are arranged on a side of the handle that extends parallel to the striking surface (6) of the racket (2).
- Handle according to any one of the preceding claims, wherein the handle (4) comprises one or multiple recesses (22) in which the respective force sensor (12) can be inserted.
- Handle according to claim 5, wherein the evaluation unit (16) is electrically connected with a power source (17), and the evaluation unit (16) and the power source (17) are arranged in a common housing (21) which is attached on or in the handle (4).
- Handle according to any one of the preceding claims, wherein the evaluation unit (16) comprises a storage device by means of which the force values determined by the force sensors (12) can be stored temporarily or permanently, and from which this measurement data can be retrieved visually.
- Handle according to any one of the preceding claims, wherein the force sensors (12) are configured as strain gauges or as capacitive or inductive proximity sensors.
- Handle according to any one of the preceding claims, wherein the handle comprises two handle half-shells, and a force sensor (12) is arranged below each of the handle half-shells.
- Handle according to claim 9, wherein the two handle half-shells are spaced from one another and can be pressed against each other by the force applied by the hand of the player.
- Handle according to any one of the preceding claims, wherein the force measurement device (11) is suitable for measuring the forces transmitted by the third, fourth and fifth finger of the hand of the player in each case independently of one another.
- Handle according to any one of the preceding claims, wherein the force measurement device (11) comprises three sensors.
- Sports equipment, in particular tennis racket, squash racket, racquetball racket, padel racket, badminton racket or golf club, having a handle according to any one of claims 1 to 12.
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PCT/EP2008/008231 WO2009043558A1 (en) | 2007-09-28 | 2008-09-26 | Force sensor for racquet handle |
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DE202023101325U1 (en) | 2023-03-16 | 2023-04-06 | Uwe Pfeiffer | Racquet for ball games with flexible weight adjustment |
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DE3929459C1 (en) * | 1989-09-05 | 1991-01-24 | Wolfgang 4800 Bielefeld De Suttner | |
US5377541A (en) * | 1992-11-18 | 1995-01-03 | Patten; Richard L. | Golf club grip training assembly |
US5681993A (en) * | 1994-04-18 | 1997-10-28 | Heitman; Lynn Byron | Method and apparatus for measuring grip force |
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US6033370A (en) * | 1992-07-01 | 2000-03-07 | Preventive Medical Technologies, Inc. | Capacitative sensor |
AU2003257447A1 (en) * | 2002-07-10 | 2004-02-02 | Ab Beheer B.V. | Hand pressure sensor warning device |
-
2007
- 2007-09-28 DE DE202007013632U patent/DE202007013632U1/en not_active Expired - Lifetime
-
2008
- 2008-09-26 EP EP08835433.7A patent/EP2195100B1/en active Active
- 2008-09-26 WO PCT/EP2008/008231 patent/WO2009043558A1/en active Application Filing
- 2008-09-26 ES ES08835433T patent/ES2790592T3/en active Active
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3929459C1 (en) * | 1989-09-05 | 1991-01-24 | Wolfgang 4800 Bielefeld De Suttner | |
US5377541A (en) * | 1992-11-18 | 1995-01-03 | Patten; Richard L. | Golf club grip training assembly |
US5681993A (en) * | 1994-04-18 | 1997-10-28 | Heitman; Lynn Byron | Method and apparatus for measuring grip force |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE202023101325U1 (en) | 2023-03-16 | 2023-04-06 | Uwe Pfeiffer | Racquet for ball games with flexible weight adjustment |
Also Published As
Publication number | Publication date |
---|---|
WO2009043558A1 (en) | 2009-04-09 |
DE202007013632U1 (en) | 2007-12-06 |
EP2195100A1 (en) | 2010-06-16 |
ES2790592T3 (en) | 2020-10-28 |
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