Tennis racket grip strength testing device

Abstract

The utility model discloses a tennis racket grip strength testing device, which relates to the field of testing devices and comprises a tennis racket, terminal equipment, a digital conversion module, a wireless transmission module, a wireless receiving module, a flexible sensor, a lithium battery and a battery fixing component. The digital conversion module and the wireless transmission module are arranged on the inner side of a racket throat of the tennis racket, the lithium battery is fixedly installed in the racket throat of the tennis racket through the battery fixing assembly, a racket handle of the tennis racket is of an octagonal prism structure, and the flexible sensors are arranged on the side faces of the racket handle of the tennis racket respectively. The wireless receiving module is electrically connected with the terminal device, the flexible sensor is electrically connected with the digital conversion module, the lithium battery is electrically connected with the digital conversion module and the wireless transmission module, the digital conversion module is electrically connected with the wireless transmission module, and the wireless transmission module is in communication connection with the wireless receiving module. The grip strength testing device can solve the problem that a traditional grip strength testing device is poor in user experience in the actual movement process.

Description

Technical Field

[0001] The utility model relates to the field of testing devices, in particular to a tennis racket grip testing device. Background Art

[0002] At present, most tennis rackets are of one-piece structure. The strings of some tennis rackets are too tight, and beginners are often injured by the recoil of the high-speed moving tennis ball when using them. In sports competitions and teaching, real-time identification of athletes' grip posture can help coaches understand the students' exercise status.

[0003] Traditional grip recognition methods mainly rely on the experience of coaches, or use bracelets based on electromyography sensors for measurement and recognition; in official competitions, high-speed cameras are often used for judgment. However, the accuracy of judgment based on the experience of coaches is not high, and the cost of high-speed cameras is too high. Bracelets based on electromyography sensors will affect the user's operating experience during use, thereby affecting the results of the grip test.

[0004] Therefore, it is necessary to study a low-cost tennis racket grip testing device with a good user operating experience. Utility Model Content

[0005] The utility model provides a tennis racket grip testing device to solve the problem in the prior art that the user's operating feeling is poor due to the accompanying sports equipment during the actual sports process.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A tennis racket grip testing device, comprising: a tennis racket, a terminal device, a digital conversion module, a wireless transmission module, a wireless receiving module, a flexible sensor, a lithium battery and a battery fixing assembly;

[0008] The digital conversion module and the wireless transmission module are arranged on the inner side of the throat of the tennis racket, the lithium battery is fixedly installed inside the throat of the tennis racket through a battery fixing assembly, the handle of the tennis racket is an octagonal prism structure, the flexible sensors are respectively arranged on each side of the handle of the tennis racket, the wireless receiving module is electrically connected to the terminal device, the flexible sensor is electrically connected to the digital conversion module, the lithium battery is electrically connected to the digital conversion module and the wireless transmission module, the digital conversion module is electrically connected to the wireless transmission module, and the wireless transmission module is communicatively connected to the wireless receiving module.

[0009] In some embodiments, a sponge block is disposed between the digital conversion module and the inner side of the throat of the tennis racket, and a sponge block is disposed between the wireless transmission module and the inner side of the throat of the tennis racket.

[0010] In some embodiments, the digital conversion module is a multi-channel pressure converter.

[0011] In some embodiments, the multi-channel pressure transducer is an eight-channel pressure transducer, or two stacked four-channel pressure transducers.

[0012] In some embodiments, the wireless transmission module is a Bluetooth transmitter.

[0013] In some embodiments, the wireless receiving module includes a Bluetooth receiver and a USB to serial port board, the Bluetooth receiver is communicatively connected to the Bluetooth transmitter, the serial port end of the USB to serial port board is connected to the Bluetooth receiver, and the USB interface end of the USB to serial port board is connected to the terminal device.

[0014] In some embodiments, the flexible sensor is in the shape of a long strip, the length of the flexible sensor is less than or equal to the length of the handle of the tennis racket, and the width of the flexible sensor is less than the width of a single side of the handle of the tennis racket.

[0015] In some embodiments, the wireless transmission module and the digital conversion module are respectively disposed on the inner sides of two opposite side structures in the triangular area formed by the throat of the tennis racket.

[0016] In some embodiments, the battery fixing assembly is disposed inside the upper side structure in the triangular area formed by the throat of the tennis racket.

[0017] In some embodiments, the battery fixing assembly includes a first card slot and a second card slot, and the first card slot and the second card slot are respectively arranged relative to the inner surface of the upper side structure. When in use, the two sides of the lithium battery are respectively fixed in the first card slot and the second card slot.

[0018] Compared with the prior art, the utility model has the following beneficial effects:

[0019] The utility model provides a tennis racket grip testing device, wherein a digital conversion module and a wireless transmission module are arranged on the inner side of the throat of the tennis racket, a lithium battery is fixedly installed inside the throat of the tennis racket through a battery fixing assembly, the handle of the tennis racket is an octagonal prism structure, flexible sensors are respectively arranged on each side of the handle of the tennis racket, a wireless receiving module is electrically connected to the terminal device, the flexible sensor is electrically connected to the digital conversion module, the lithium battery is electrically connected to the digital conversion module and the wireless transmission module, the digital conversion module is electrically connected to the wireless transmission module, and the wireless transmission module is communicatively connected to the wireless receiving module. The digital conversion module and the wireless transmission module are arranged on the inner side of the throat of the racket, and the flexible sensors are arranged on the sides of the handle. The flexible sensors are electrically connected to the digital conversion module. Therefore, in actual use, when the user holds the handle, the force of the palm and the handle will be collected by the flexible sensor. The flexible sensor contacts the palm on the surface of the handle and does not affect the user's gripping posture, thereby improving the user experience. In addition, the utility model integrates a lithium battery, a digital conversion module and a wireless transmission module into a tennis racket. In actual use, the user's gripping posture will not deviate due to too many attached equipment, thereby causing a deviation in the grip strength test.

[0020] Furthermore, the utility model arranges a sponge block between the digital conversion module, the wireless transmission module and the throat, which can prevent collision during movement and cause damage to the digital conversion module and the wireless transmission module.

[0021] Furthermore, the digital conversion module of the utility model adopts a multi-channel pressure converter, the wireless transmission module adopts a Bluetooth transmitter, and the wireless receiving module adopts a Bluetooth receiver and a USB to serial port board, which can reduce costs compared to the high-speed camera and electromyography sensor used in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram of the structure of a tennis racket grip strength testing device provided by an embodiment of the utility model;

[0023] Figure 2 A schematic diagram of the structure of the throat of a tennis racket grip strength testing device provided by an embodiment of the utility model;

[0024] Figure 3 A schematic diagram of the structure of a wireless receiving module provided in an embodiment of the utility model;

[0025] Figure 4 A schematic diagram of the structure of the handle of a tennis racket grip strength testing device provided by an embodiment of the utility model;

[0026] Figure 5 A schematic diagram of the working principle structure of a tennis racket grip strength testing device provided by an embodiment of the utility model;

[0027] In the figure, 1. lithium battery; 2. digital conversion module; 3. wireless transmission module; 4. Bluetooth receiver; 5. flexible sensor; 5-1. first flexible sensor; 5-2. second flexible sensor; 5-3. third flexible sensor; 5-4. fourth flexible sensor; 5-5. fifth flexible sensor; 5-6. sixth flexible sensor; 5-7. seventh flexible sensor; 5-8. eighth flexible sensor; 6. sponge block; 7. battery fixing assembly; 8. USB to serial port board; 9. USB interface terminal. DETAILED DESCRIPTION

[0028] In the following, only some exemplary embodiments are briefly described, and the described embodiments can be modified in various different ways without departing from the spirit or scope of the present invention. Therefore, the drawings and descriptions are considered to be illustrative rather than restrictive in nature.

[0029] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed or operate in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0030] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0031] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connected", "fixed" and the like should be understood in a broad sense, for example, fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection, indirect connection through an intermediate medium, internal connection between two elements, or interaction between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] The embodiments of the present utility model are described in detail below with reference to the accompanying drawings.

[0033] like Figure 1 As shown, this embodiment provides a tennis racket grip testing device, including a tennis racket, a flexible sensor 5, a terminal device, a digital conversion module 2, a wireless transmission module 3, a wireless receiving module, a lithium battery 1 and a battery fixing assembly 7;

[0034] Specifically, the digital conversion module 2 and the wireless transmission module 3 are arranged on the inner side of the throat of the tennis racket, the lithium battery 1 is fixedly installed inside the throat of the tennis racket through the battery fixing assembly 7, the handle of the tennis racket is an octagonal prism structure, the flexible sensor 5 is respectively arranged on each side of the handle of the tennis racket, the wireless receiving module is electrically connected to the terminal device, the flexible sensor 5 is electrically connected to the digital conversion module 2, the lithium battery 1 is electrically connected to the digital conversion module 2 and the wireless transmission module 3, the lithium battery 1 provides power for the digital conversion module 2 and the wireless transmission module 3, the digital conversion module 2 is electrically connected to the wireless transmission module 3, and the wireless transmission module 3 is communicatively connected to the wireless receiving module, such as Figure 3 As shown, the wireless receiving module includes a Bluetooth receiver 4 (model D29) and a USB to serial port board 8. Figure 2 As shown, the wireless transmission module 3 and the digital conversion module 2 are respectively arranged on the inner sides of the two opposite side structures in the triangular area formed by the throat of the tennis racket. The battery fixing assembly 7 is arranged inside the upper side structure in the triangular area formed by the throat of the tennis racket.

[0035] Preferably, a sponge block 6 is arranged between the digital conversion module 2 and the inner side of the throat of the tennis racket, and a sponge block 6 is arranged between the wireless transmission module 3 and the inner side of the throat of the tennis racket. The sponge block 6 can prevent the digital conversion module 2 and the wireless transmission module 3 from being damaged by impact during the test.

[0036] Preferably, the battery fixing assembly 7 includes a first card slot and a second card slot, and the first card slot and the second card slot are respectively arranged closely to the inner surface of the upper side structure and relatively to each other. When in use, both sides of the lithium battery 1 are respectively fixed in the first card slot and the second card slot.

[0037] The digital conversion module 2 is a single eight-channel pressure converter MY2901, and the wireless transmission module 3 is a Bluetooth transmitter JDY-31. The flexible sensor 5 is a long flexible film pressure sensor RP-S40-LT, the length of the flexible sensor 5 is less than or equal to the length of the handle of the tennis racket, and the width of the flexible sensor 5 is less than the width of a single side of the handle of the tennis racket. The Bluetooth receiver 4D29 is connected to the Bluetooth transmitter JDY-31 for communication, the serial port end of the USB to serial port board 8 is connected to the Bluetooth receiver 4D29, and the USB interface end 9 of the USB to serial port board 8 is connected to the terminal device, and the terminal device is a computer.

[0038] Among them, the flexible sensor 5 uses a total of 8 pieces (including a first flexible sensor 5-1, a second flexible sensor 5-2, a third flexible sensor 5-3, a fourth flexible sensor 5-4, a fifth flexible sensor 5-5, a sixth flexible sensor 5-6, a seventh flexible sensor 5-7 and an eighth flexible sensor 5-8), and the installation positions are as follows: Figure 4 As shown in the figure, flexible film pressure sensors RP-S40-LT are used, each of which is connected to an eight-channel pressure converter MY2901, which is connected in series with a Bluetooth transmitter JDY-31. Eight flexible film pressure sensors RP-S40-LT are attached to the eight surfaces of the handle of a tennis racket. Figure 5 As shown, in the test process of this embodiment, the user holds the handle of the tennis racket, and the eight flexible film pressure sensors RP-S40-LT on the handle can test the pressure value of the current corresponding position and transmit the pressure value information to the eight-channel pressure converter MY2901. The eight-channel pressure converter MY2901 converts the received pressure value information and transmits it to the Bluetooth transmitter JDY-31. Then the Bluetooth transmitter JDY-31 sends the received information to the Bluetooth receiver 4D29 via Bluetooth. After receiving the information, the Bluetooth receiver 4D29 transmits the information to the computer via the USB to serial port board 8. The computer will sort and analyze the received information to obtain the grip test results.

[0039] The flexible film pressure sensor RP-S40-LT measures the interaction force between the palm and the handle of the tennis racket when it touches the ball. The grip test result is obtained based on the interaction force to determine whether the tension of the racket strings is suitable for the user at this time.

[0040] Specifically, since the pressure on each surface of different grips (such as continental grip, eastern grip, semi-western grip, western grip, etc.) is regular, the grip method can be judged by measuring the results and comparing the rules; secondly, when the flexible sensor 5 measures the dynamic changes in the interaction force between the palm at the racket face and the eight surfaces of the handle when the tennis racket touches the ball, the state of the return ball (flat shot, topspin, backspin, etc.) can be judged according to the changes in each surface.

[0041] The structure of this embodiment is novel, and the electronic components used are low-cost and easy to purchase. Since this embodiment integrates the grip strength test related components into the tennis racket, it will not affect the user's grip posture, so that the user has a good operating experience. In addition, this embodiment uses a sponge block to reduce the force generated by the collision, so that the tennis racket grip strength test device is not easily damaged during use, can be reused continuously, and is more economical and environmentally friendly.

[0042] Embodiment 2

[0043] The difference from the first embodiment is that the digital conversion module 2 uses two superimposed four-channel pressure converters. In this case, the pressure converter MY2901 can be used, and its four-channel mode is used to superimpose two pressure converters MY2901.

[0044] It is known from common technical knowledge that the present invention can be implemented by other embodiments that do not deviate from its spirit or essential features. Therefore, the embodiments disclosed above are only examples in all respects, not the only ones, and all changes within the scope of the present invention or equivalent to the scope of the present invention are included in the present invention.

Claims

1. A tennis racket grip strength testing device, characterized in that: include: A tennis racket, a terminal device, a digital conversion module (2), a wireless transmission module (3), a wireless receiving module, a flexible sensor (5), a lithium battery (1) and a battery fixing assembly (7); The digital conversion module (2) and the wireless transmission module (3) are arranged on the inner side of the throat of the tennis racket, the lithium battery (1) is fixedly installed inside the throat of the tennis racket via a battery fixing assembly (7), the handle of the tennis racket is an octagonal prism structure, the flexible sensors (5) are respectively arranged on the side surfaces of the handle of the tennis racket, the wireless receiving module is electrically connected to the terminal device, the flexible sensor (5) is electrically connected to the digital conversion module (2), the lithium battery (1) is electrically connected to the digital conversion module (2) and the wireless transmission module (3), the digital conversion module (2) is electrically connected to the wireless transmission module (3), and the wireless transmission module (3) is communicatively connected to the wireless receiving module.

2. A tennis racket grip strength testing device according to claim 1, characterized in that: A sponge block (6) is arranged between the digital conversion module (2) and the inner side of the throat of the tennis racket, and a sponge block (6) is arranged between the wireless transmission module (3) and the inner side of the throat of the tennis racket.

3. A tennis racket grip strength testing device according to claim 1, characterized in that: The digital conversion module (2) is a multi-channel pressure converter.

4. A tennis racket grip strength testing device according to claim 3, characterized in that: The multi-channel pressure converter is an eight-channel pressure converter, or two superimposed four-channel pressure converters.

5. A tennis racket grip strength testing device according to claim 1, characterized in that: The wireless transmission module (3) is a Bluetooth transmitter.

6. A tennis racket grip strength testing device according to claim 5, characterized in that: The wireless receiving module comprises a Bluetooth receiver (4) and a USB to serial port board (8), wherein the Bluetooth receiver (4) is communicatively connected to the Bluetooth transmitter, the serial port end of the USB to serial port board (8) is connected to the Bluetooth receiver (4), and the USB interface end (9) of the USB to serial port board (8) is connected to the terminal device.

7. A tennis racket grip strength testing device according to claim 1, characterized in that: The flexible sensor (5) is in the shape of a long strip, the length of the flexible sensor (5) is less than or equal to the length of the handle of the tennis racket, and the width of the flexible sensor (5) is less than the width of a single side of the handle of the tennis racket.

8. A tennis racket grip strength testing device according to claim 1, characterized in that: The wireless transmission module (3) and the digital conversion module (2) are respectively arranged on the inner sides of the two opposite side structures in the triangular area formed by the throat of the tennis racket.

9. A tennis racket grip strength testing device according to claim 1, characterized in that: The battery fixing assembly (7) is arranged inside the upper side structure in the triangular area formed by the throat of the tennis racket.

10. A tennis racket grip strength testing device according to claim 9, characterized in that: The battery fixing assembly (7) comprises a first card slot and a second card slot, wherein the first card slot and the second card slot are respectively arranged in close contact with the inner surface of the upper side structure and opposite to each other, and when in use, the two sides of the lithium battery (1) are respectively fixed in the first card slot and the second card slot.

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