Force measuring device

Abstract

The utility model discloses a force measuring device. The force measuring device comprises an installation main body, a first-stage force measuring assembly, a second-stage force measuring assembly and a holding part. The first-stage force measuring assembly comprises a first-stage force measuring arm and a force measuring driving device, one end of the first-stage force measuring arm is rotatably installed on the front side face of the installation body around the axis extending in the front-back direction, and an included angle is formed between the extending direction of the first-stage force measuring arm and the front side face of the installation body. The primary force measurement arm has an initial position where the primary force measurement arm rotates to the other end and extends upwards and a final position where the other end extends horizontally, and the force measurement driving device drives the primary force measurement arm to rotate between the final position and the initial position for force measurement; the second-stage force measuring assembly comprises a torsion sensor, one end of the torsion sensor is rotatably mounted to the other end of the first-stage force measuring arm, so that the other end of the torsion sensor has a moving stroke close to or away from the front side surface of the mounting main body; the holding part is installed at the other end of the torsion sensor and used for being held by a user.

Description

Technical Field

[0001] This utility model relates to the field of fitness equipment technology, and in particular to a force measuring device. Background Technology

[0002] With the development of people's lives and entertainment, more and more people are paying attention to the development of their physical fitness and are starting to use more fitness equipment to assist in exercise. Among them, arm wrestling has been a long-standing and popular form of strength training. However, simply arm wrestling cannot allow people to accurately judge their wrist strength, and lifting with dumbbells and other methods cannot accurately reflect the strength in the process of arm wrestling.

[0003] In existing technologies, force is typically measured using a force gauge by rotating its handle. However, force gauges often only provide simple damping, preventing testers from exerting their full strength in such combat tests. This results in only a rough measurement of force, failing to accurately reflect the maximum wrist force available during arm wrestling. In conclusion, existing technologies are insufficient for accurately measuring wrist strength. Utility Model Content

[0004] The main purpose of this invention is to provide a force measuring device that solves the problem that existing technologies cannot accurately measure wrist strength.

[0005] To achieve the above objectives, this utility model provides a force measuring device, comprising:

[0006] Installation main body;

[0007] A primary force measuring component includes a primary force measuring arm and a force measuring drive device. One end of the primary force measuring arm is rotatably mounted to the front side of the mounting body about a front-to-back extending axis. The extension direction of the primary force measuring arm is set at an angle with the front side of the mounting body. The primary force measuring arm has an initial position where it rotates to an upward extending position at the other end and an end position where it extends horizontally at the other end. The force measuring drive device drives the primary force measuring arm to rotate between the end position and the initial position to measure force.

[0008] The secondary force measuring component includes a torque sensor, one end of which is rotatably mounted to the other end of the primary force measuring arm, such that the other end of the torque sensor has a travel distance that moves towards or away from the front side of the mounting body.

[0009] A grip portion, mounted to the other end of the torque sensor, is provided for the user to hold; and,

[0010] A control device, electrically connected to the force measuring drive device, is used to control the force measuring drive device to drive the first-stage force measuring arm to rotate according to a preset mode.

[0011] In one embodiment, a plurality of limiting ribs are formed on the outer side wall of the torque sensor, extending along the axial direction of the torque sensor, and the plurality of limiting ribs are spaced apart along the circumferential direction of the torque sensor.

[0012] The gripping part has a mounting hole, and a plurality of mating ribs are formed on the inner sidewall of the mounting hole. The mounting hole is sleeved onto the torque sensor from the other end of the torque sensor, and the plurality of mating ribs are limited between the plurality of limiting ribs.

[0013] In one embodiment, a limiting groove is formed on the outer side wall of the torque sensor, and a threaded hole is formed on the outer side wall of the gripping part corresponding to the limiting groove;

[0014] The force measuring device also includes a mounting pin, which passes through the threaded hole and extends into the limiting groove.

[0015] In one embodiment, the force measuring device further includes a display device, which is electrically connected to the force measuring drive device, the torque sensor, and the control device to display the detection results of the force measuring drive device and the torque sensor.

[0016] In one embodiment, the force measuring drive device includes a servo drive motor and a transmission shaft that is driven and connected to the output shaft of the servo drive motor, wherein the servo drive motor is mounted on the front side of the mounting body;

[0017] A snap-fit ​​structure is formed between the end face of one end of the first-stage force-measuring arm and the end face of the free end of the transmission shaft, including a snap-fit ​​protrusion and a snap-fit ​​groove that cooperate with each other. The snap-fit ​​protrusion is snapped into the snap-fit ​​groove. One of the snap-fit ​​protrusion and the snap-fit ​​groove is located on the end face of one end of the first-stage force-measuring arm, and the other is located on the end face of the free end of the transmission shaft.

[0018] In one embodiment, the force-measuring drive device is movably mounted on the front side of the mounting body in the vertical direction, so that the first-stage force-measuring arm is movably set in the vertical direction.

[0019] In one embodiment, the force measuring device further includes a support platform, and the mounting body is disposed on one side of the upper end face of the support platform, the support platform being used to support the user's arm.

[0020] In one embodiment, a support pad is provided on the upper surface of the support platform; and / or,

[0021] The upper surface of the support platform is provided with a handle.

[0022] In one embodiment, the force measuring device further includes a coin-operated linkage device, which is located on the front end of the support platform. The control device is electrically connected to the coin-operated linkage device. After the coin-operated linkage device acquires a coin, the control device controls the force measuring drive device to drive the first-stage force measuring arm to rotate according to a preset mode.

[0023] This utility model also provides a control method for the force measuring device according to any one of the above claims, the control method comprising the following steps:

[0024] Determine the user's preset mode;

[0025] After the test begins, the real-time arm force of the user rotating the first-stage force-measuring arm is acquired at preset time intervals.

[0026] The machine driving force of the force measuring and driving device is determined according to the preset mode and the real-time arm force.

[0027] The machine drives the primary force-measuring arm to rotate, and the user's arm force is determined based on the rotation of the primary force-measuring arm.

[0028] In one embodiment, the preset modes include a measurement mode, a specified force mode, a confrontation mode, a training mode, an online mode, and a strategy mode;

[0029] In the measurement mode, the step of determining the machine driving force of the force measuring drive device according to the preset mode and the real-time arm force includes: using the preset driving force as the machine driving force.

[0030] In the case of the specified force mode, the step of determining the machine driving force of the force measuring drive device according to the preset mode and the real-time arm force includes: taking the input driving force as the machine driving force;

[0031] In the confrontation mode, the step of determining the machine driving force of the force measuring drive device according to the preset mode and the real-time arm force includes: determining the real-time driving force of the force measuring drive device according to the real-time arm force, and using the real-time driving force as the machine driving force.

[0032] In the training mode, the step of determining the machine driving force of the force measuring drive device according to the preset mode and the real-time arm force includes: taking the initial driving force as the machine driving force, and changing the initial driving force stepwise according to the preset time interval.

[0033] In the online mode, the step of determining the machine driving force of the force measuring drive device according to the preset mode and the real-time arm force includes: obtaining the user's real-time arm force in another force measuring device as the machine driving force.

[0034] In one embodiment, the step of driving the first-stage force-measuring arm to rotate includes:

[0035] When the real-time arm force is greater than the machine driving force, the force measuring drive device drives the first-stage force measuring arm to rotate in the direction of the user's force application;

[0036] When the real-time arm force is less than or equal to the machine driving force, the force measuring drive device drives the first-stage force measuring arm to rotate in the opposite direction of the user's force application.

[0037] In one embodiment, the force-measuring drive device is a servo drive motor;

[0038] When the servo drive motor drives the first-stage force-measuring arm to rotate in the direction of the user's force application, the following relationship is satisfied:

[0039] F×5.236+33==D

[0040] When the force-measuring drive device drives the first-stage force-measuring arm to rotate in the opposite direction of the user's force application, the following relationship is satisfied:

[0041] F×10.01+35==D

[0042] Where F is the machine driving force and D is the motor duty cycle.

[0043] This utility model provides a force measuring device. The mounting body is equipped with a primary force measuring arm, and a torque sensor is installed on the primary force measuring arm. Typically, the torque sensor has a gripping part. During use, the user grips the gripping part in an arm-wrestling posture and rotates the primary force measuring arm. Simultaneously, the force measuring drive device drives the primary force measuring arm to rotate, providing resistance. The force measuring drive device measures the user's arm force during the arm-wrestling process, and the torque sensor measures the user's wrist torque. The device measures both the user's arm force and wrist force in a single test. It has a simple structure, is convenient to use, and is easy to operate. Attached Figure Description

[0044] Figure 1 This is a three-dimensional structural schematic diagram of the force measuring device provided in the embodiment of this utility model;

[0045] Figure 2 yes Figure 1 A three-dimensional structural diagram of the force measuring device (without the main installation part) from another perspective;

[0046] Figure 3 yes Figure 2 Schematic diagram of the structure of the torque sensor;

[0047] Figure 4 yes Figure 2 A three-dimensional structural diagram of the force measuring device;

[0048] Figure 5 This is a three-dimensional structural schematic diagram of another embodiment of the force measuring device provided by this utility model.

[0049] Explanation of icon numbers:

[0050] 100. Force measuring device; 1. Mounting body; 2. Primary force measuring component; 21. Primary force measuring arm; 211. Snap-on slot; 22. Force measuring drive device; 221. Snap-on protrusion; 3. Secondary force measuring component; 31. Torque sensor; 311. Limiting rib; 312. Limiting groove; 4. Grip part; 5. Supporting platform; 51. Supporting pad; 52. Handle; 6. Coin-operated linkage device; 7. Display device.

[0051] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0052] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0053] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0054] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0055] Please see Figures 1 to 2 This utility model provides a force measuring device 100, including a mounting body 1, a primary force measuring component 2, a secondary force measuring component 3, a gripping part 4, and a control device; the primary force measuring component 2 includes a primary force measuring arm 21 and a force measuring drive device 22. One end of the primary force measuring arm 21 is rotatably mounted to the front side of the mounting body 1 about a front-rear axis, and the extension direction of the other end is set at an angle with the front side of the mounting body 1. The primary force measuring arm 21 has an initial position where it rotates to the upward extension of the other end and an end position where it extends horizontally. The force-measuring drive device 22 drives the first-stage force-measuring arm 21 to rotate from the end position to the initial position to measure force; the second-stage force-measuring assembly 3 includes a torque sensor 31, one end of which is rotatably mounted to the other end of the first-stage force-measuring arm 21 around a left-right axis; the grip part 4 is mounted to the other end of the torque sensor 31 for the user to hold; the control device is electrically connected to the force-measuring drive device 22 and is used to control the force-measuring drive device 22 to drive the first-stage force-measuring arm to rotate according to a preset mode.

[0056] In the force measuring device 100 provided by this utility model, a primary force measuring arm 21 is provided on the mounting body 1, and a torque sensor 31 is provided on the primary force measuring arm 21. Typically, a gripping part 4 is provided on the torque sensor 31. During use, the user grips the gripping part 4 in an arm-wrestling posture and rotates the primary force measuring arm 21. At the same time, the force measuring drive device 22 drives the primary force measuring arm 21 to rotate and provide resistance. The force measuring drive device 22 measures the magnitude of the user's arm force during the arm-wrestling process, and the torque sensor 31 measures the magnitude of the user's wrist torque. The user's arm force and wrist force are measured simultaneously in one test. The structure is simple, convenient and easy to use.

[0057] It should be noted that the structure of the first-level force-measuring arm 31 is a human upper arm-shaped structure, the structure of the torque sensor 31 is a human forearm-shaped structure, and the grip part 4 is a human hand-shaped structure.

[0058] For further details, please refer to Figure 3 The torque sensor 31 has multiple limiting ribs 311 formed on its outer sidewall, and these ribs are spaced apart circumferentially along the torque sensor. The grip portion 4 has a mounting hole, and multiple mating ribs are formed on the inner sidewall of the mounting hole. The mounting hole is fitted onto the torque sensor from the other end, and the mating ribs are positioned between the multiple limiting ribs 311. In this embodiment, the grip portion 4 is mounted onto the torque sensor 31 using the mating ribs and the limiting ribs 311, preventing the grip portion 4 from rotating relative to the torque sensor 31 and facilitating user gripping and use.

[0059] Furthermore, a limiting groove 312 is formed on the outer side wall of the torque sensor 31, and a threaded hole is formed on the outer side wall of the gripping part 4 corresponding to the limiting groove 312; the force measuring device 100 also includes a mounting pin, which is threaded through the threaded hole and extends into the limiting groove 312, so as to fix the mounting hole on the torque sensor 31.

[0060] Furthermore, the limiting groove is arranged in a ring shape so that the gripping part 4 can still be fixed on the torque sensor 31 after the angle of the gripping part 4 is adjusted.

[0061] In addition, the force measuring device 100 also includes a display device 7, which is electrically connected to the force measuring drive device 22, the torque sensor 31 and the control device, and is used to display the detection results of the force measuring drive device and the torque sensor.

[0062] On the other hand, please see Figure 4 The force-measuring drive device 22 includes a servo drive motor and a transmission shaft driven by the output shaft of the servo drive motor. The servo drive motor is mounted on the front side of the mounting body. A snap-fit ​​structure is formed between the end face of one end of the primary force-measuring arm 21 and the end face of the free end of the transmission shaft, including a snap-fit ​​protrusion 221 and a snap-fit ​​groove 211 that cooperate with each other. The snap-fit ​​protrusion 221 is snapped into the snap-fit ​​groove 211. One of the snap-fit ​​protrusion 221 and the snap-fit ​​groove 211 is located on the end face of one end of the primary force-measuring arm 21, and the other is located on the end face of the free end of the transmission shaft. This facilitates the connection between the primary force-measuring arm 21 and the transmission shaft.

[0063] Furthermore, the force-measuring drive device is movably mounted vertically to the front side of the mounting body to facilitate adjustment of the position of the first-stage force-measuring arm 21.

[0064] There are various ways to implement the force measuring drive device to be movably installed on the front side of the mounting body in the vertical direction. For example, it can be installed by a guide rail or driven by a motor to achieve vertical movement. No specific limitation is made here.

[0065] On the other hand, please see Figure 5 The force measuring device 100 also includes a support platform 5, and the mounting body is located on one side of the upper end face of the support platform. The support platform 5 is used to support the user's arm.

[0066] Furthermore, a support pad 51 is provided on the upper surface of the support platform 5 to facilitate the user's arm rest.

[0067] Similarly, a handle 52 is provided on the upper surface of the support platform 5 to facilitate the user's grip and exert force.

[0068] It should be noted that in this embodiment, the support pad 51 and the grip 52 can be either one or both, and no specific restriction is made here.

[0069] In addition, the force measuring device 100 also includes a coin-operated linkage device 6, which is located on the front end of the bearing platform 5. The control device is electrically connected to the coin-operated linkage device. After the coin-operated linkage device 6 acquires a coin, the control device controls the force measuring drive device to drive the first-stage force measuring arm to rotate according to a preset mode.

[0070] Based on the force measuring device 100 described above, this utility model also provides a control method for the force measuring device, the control method comprising the following steps:

[0071] S10. Determine the user's preset mode;

[0072] S20. After the test starts, the real-time arm force of the user rotating the first-stage force-measuring arm is obtained in real time according to the preset time interval.

[0073] S30. Determine the machine driving force of the force measuring and driving device according to the preset mode and the real-time arm force.

[0074] S40. Drive the first-stage force-measuring arm to rotate according to the machine driving force, and determine the user's arm force based on the rotation of the first-stage force-measuring arm.

[0075] In this embodiment, depending on the mode selected by the user, different resistance forces are selected according to the user's force after the test begins, realizing a more interesting force measurement method and facilitating the use of the force measurement device.

[0076] The preset modes include measurement mode, specified force mode, confrontation mode, training mode, online mode, and strategy mode;

[0077] In the measurement mode, the step of determining the machine driving force of the force measuring drive device according to the preset mode and the real-time arm force includes: using the preset driving force as the machine driving force.

[0078] In the measurement mode, the force-measuring drive device is driven by a preset driving force, so that the user resists a fixed force. During the resistance, the user's arm strength can be detected by the magnitude of the resistance received by the torque sensor and the force-measuring drive device.

[0079] In the case of the specified force mode, the step of determining the machine driving force of the force measuring drive device according to the preset mode and the real-time arm force includes: taking the input driving force as the machine driving force;

[0080] In the specified strength mode, users can input the amount of strength they need to complete challenges of different strengths.

[0081] In the confrontation mode, the step of determining the machine driving force of the force measuring drive device according to the preset mode and the real-time arm force includes: determining the real-time driving force of the force measuring drive device according to the real-time arm force, and using the real-time driving force as the machine driving force.

[0082] In the confrontation mode, the force measuring and driving device will adjust the driving force in real time according to the force exerted by the user, so as to realize real-time confrontation without the need for manual adjustment of the force.

[0083] In the training mode, the step of determining the machine driving force of the force measuring drive device according to the preset mode and the real-time arm force includes: taking the initial driving force as the machine driving force, and changing the initial driving force stepwise according to the preset time interval.

[0084] In training mode, the machine's driving force changes stepwise to facilitate periodic training.

[0085] In the online mode, the step of determining the machine driving force of the force measuring drive device according to the preset mode and the real-time arm force includes: obtaining the user's real-time arm force in another force measuring device as the machine driving force.

[0086] In the online mode, the arm force input of users between two machines can be used as the driving force of the machines to compete against each other, so that users in different regions can compete against each other.

[0087] In addition, the step of driving the first-stage force-measuring arm to rotate includes:

[0088] When the real-time arm force is greater than the machine driving force, the force measuring drive device drives the first-stage force measuring arm to rotate in the direction of the user's force application;

[0089] In this embodiment, when the real-time arm force is greater than the machine driving force, it indicates that the user has defeated the force measuring device 100. At this time, the force measuring drive device drives the first-stage force measuring arm to rotate in the direction of the user's force, so that the first-stage force measuring arm can recover in the direction of the force, avoiding excessive confrontation with the user and damaging the machine. At the same time, it can simulate the actual combat environment, making it easier for the user to intuitively discover the victory.

[0090] When the real-time arm force is less than or equal to the machine driving force, the force measuring drive device drives the first-stage force measuring arm to rotate in the opposite direction of the user's force application.

[0091] In this embodiment, when the real-time arm force is less than or equal to the machine's driving force, it indicates that the user is still fighting against the machine. In this case, the machine rotates in the opposite direction of the user's force to achieve the fight.

[0092] Specifically, the force-measuring drive device is a servo drive motor;

[0093] When the servo drive motor drives the first-stage force-measuring arm to rotate in the direction of the user's force application, the following relationship is satisfied:

[0094] F×5.236+33==D

[0095] When the force-measuring drive device drives the first-stage force-measuring arm to rotate in the opposite direction of the user's force application, the following relationship is satisfied:

[0096] F×10.01+35==D

[0097] Where F is the machine driving force, and D is the motor duty cycle used to obtain the rotational force of the first-stage force-measuring arm.

[0098] The above are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A force measuring device, characterized in that, include: Installation main body; A primary force measuring component includes a primary force measuring arm and a force measuring drive device. One end of the primary force measuring arm is rotatably mounted to the front side of the mounting body about a front-to-back extending axis. The extension direction of the primary force measuring arm is set at an angle with the front side of the mounting body. The primary force measuring arm has an initial position where it rotates to an upward extending position at the other end and an end position where it extends horizontally at the other end. The force measuring drive device drives the primary force measuring arm to rotate between the end position and the initial position to measure force. The secondary force measuring component includes a torque sensor, one end of which is rotatably mounted to the other end of the primary force measuring arm, such that the other end of the torque sensor has a travel distance that moves towards or away from the front side of the mounting body. A grip portion is attached to the other end of the torque sensor for the user to hold. as well as, A control device, electrically connected to the force measuring drive device, is used to control the force measuring drive device to drive the first-stage force measuring arm to rotate according to a preset mode.

2. The force measuring device according to claim 1, characterized in that, Multiple limiting ribs are formed on the outer side wall of the torque sensor, extending along the axial direction of the torque sensor, and the multiple limiting ribs are spaced apart along the circumferential direction of the torque sensor. The gripping part has a mounting hole, and a plurality of mating ribs are formed on the inner sidewall of the mounting hole. The mounting hole is sleeved onto the torque sensor from the other end of the torque sensor, and the plurality of mating ribs are limited between the plurality of limiting ribs.

3. The force measuring device according to claim 2, characterized in that, A limiting groove is formed on the outer side wall of the torque sensor, and a threaded hole is formed on the outer side wall of the gripping part corresponding to the limiting groove. The force measuring device also includes a mounting pin, which is threaded through the threaded hole and extends into the limiting groove.

4. The force measuring device according to claim 1, characterized in that, The force measuring device also includes a display device, which is electrically connected to the force measuring drive device, the torque sensor and the control device, and is used to display the detection results of the force measuring drive device and the torque sensor.

5. The force measuring device according to claim 1, characterized in that, The force measuring drive device includes a servo drive motor and a transmission shaft that is driven and connected to the output shaft of the servo drive motor. The servo drive motor is mounted on the front side of the mounting body. A snap-fit ​​structure is formed between the end face of one end of the first-stage force-measuring arm and the end face of the free end of the transmission shaft, including a snap-fit ​​protrusion and a snap-fit ​​groove that cooperate with each other. The snap-fit ​​protrusion is snapped into the snap-fit ​​groove. One of the snap-fit ​​protrusion and the snap-fit ​​groove is located on the end face of one end of the first-stage force-measuring arm, and the other is located on the end face of the free end of the transmission shaft.

6. The force measuring device according to claim 5, characterized in that, The force measuring drive device is movably mounted on the front side of the mounting body in the vertical direction, so that the first-stage force measuring arm is movably set in the vertical direction.

7. The force measuring device according to claim 1, characterized in that, The force measuring device also includes a support platform, and the mounting body is located on one side of the upper surface of the support platform, which is used to support the user's arm.

8. The force measuring device according to claim 7, characterized in that, The upper surface of the support platform is provided with a support pad; and / or, The upper surface of the support platform is provided with a handle.

9. The force measuring device according to claim 7, characterized in that, The force measuring device also includes a coin-operated linkage device, which is located on the front end of the support platform. The control device is electrically connected to the coin-operated linkage device. After the coin-operated linkage device acquires a coin, the control device controls the force measuring drive device to drive the first-stage force measuring arm to rotate according to a preset mode.

10. The force measuring device according to claim 1, characterized in that, The force-measuring drive device is a servo drive motor; When the servo drive motor drives the first-stage force-measuring arm to rotate in the direction of the user's force application, the following relationship is satisfied: F×5.236+33==D When the force-measuring drive device drives the first-stage force-measuring arm to rotate in the opposite direction of the user's force application, the following relationship is satisfied: F×10.01+35==D Where F is the machine driving force and D is the motor duty cycle.

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