Force analysis device
By designing a force analysis device to simulate arm movement and perform force analysis, the problem of the lack of comprehensive analysis in existing human arm experimental devices in teaching has been solved. This has enabled the scientific simulation of arm movement and force measurement, enhancing students' understanding of biological and physical applications.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-16
- Publication Date
- 2026-04-28
AI Technical Summary
Current teaching lacks experimental devices that allow for comprehensive analysis of the human arm from both biological and physical perspectives. As a result, students struggle to understand the relationships between the effort, resistance, effort arm, and resistance arm when levers are in operation, and are unable to simulate arm movements and perform force analysis.
A force analysis device was designed, including a first rod, a second rod, a support, a force sensor, a traction line, and a fixed pulley. The orientation of the traction line is adjusted by rotating the connection and the fixed pulley. Combined with an angle sensor and a movable component, the device simulates arm movement and displays the muscle exertion effect in real time.
It enables scientific simulation and force analysis of arm movements, accurately measures the forces acting on the arm, helps students understand the lever principle, and enhances their perception of biological and physical applications.
Smart Images
Figure CN224177036U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of experimental analysis, and more particularly to a force analysis device. Background Technology
[0002] In secondary school curriculum, the human arm is generally categorized under human movement within biology, primarily focusing on the composition and connections of muscles and bones. However, with the increasing emphasis on mechanics in physics, current teaching methods rarely integrate the human arm into a comprehensive analysis from both biological and physical perspectives. Students struggle to understand the relationships between effort, resistance, effort arm, and resistance arm in lever operation through scientific inquiry activities, to recognize "effort-saving levers" and "distance-saving levers" in everyday life, and to use these insights to study the joints, bones, and skeletal muscles of humans or animals, analyzing their functions from a lever perspective. Therefore, whether to deepen students' thinking from a pedagogical standpoint or to allow them to experience the applications of biology and physics in real-life situations, an experimental device is needed that can simulate arm movement, perform force analysis, and provide real-time visualization of the force generated during muscle contraction using specialized software. Utility Model Content
[0003] To overcome at least one of the problems of the prior art, this application proposes a force analysis device that can simulate arm movement and provide data for students to perform force analysis.
[0004] In a first aspect, this disclosure provides a force analysis device, including a first rod, a second rod, a support member, a force sensor, a traction line, and a fixed pulley. The second rod, the fixed pulley, and the force sensor are respectively mounted on the support member. The first rod and the second rod are rotatably connected. One end of the traction line is connected to the first rod, and the other end of the traction line is connected to the force sensor. The traction line passes through the fixed pulley to adjust its orientation.
[0005] In some embodiments, the traction line passes through the fixed pulley to adjust its orientation so that the orientation of the portion of the traction line from the fixed pulley to the force sensor is the same as the force measuring direction of the force sensor; or the traction line passes through the fixed pulley to adjust its orientation so that the orientation of the portion of the traction line from the fixed pulley to the force sensor extends from bottom to top.
[0006] In some embodiments, the second rod is provided with an angle sensor or a first probe of the angle sensor to measure the angle of the second rod.
[0007] In some embodiments, the first rod is provided with an angle disc; and / or
[0008] The first rod is equipped with an angle sensor or a second probe of the angle sensor for measuring the angle of the first rod, wherein the second probe and the first probe share an angle sensor.
[0009] In some embodiments, an adapter plate is further included, wherein the second rod and the fixed pulley are respectively mounted on the adapter plate, and the adapter plate is mounted on the support member.
[0010] In some embodiments, the connection point of one end of the traction line to the first rod is 0-20 mm away from the connection point between the first rod and the second rod.
[0011] In some embodiments, the first rod includes a first end and a second end, the first end of the first rod is rotatably connected to the second rod, and the second end of the first rod is provided with a first hook.
[0012] In some embodiments, the force sensor is movable relative to the support.
[0013] In some embodiments, a movable component is further included. The support includes a bracket, the force sensor is disposed on the movable component, the bracket is provided with a rack, and the movable component is provided with a gear. The relative movement of the movable component and the bracket is driven by the meshing of the gear and the rack.
[0014] In some embodiments, the movable element further includes a knob and / or a motor for driving the gear to move along the rack.
[0015] This invention uses a rotating first rod and a second rod to simulate the forearm and upper arm respectively. By setting up a force sensor, traction line and fixed pulley, it ensures that the force sensor can accurately measure the force on the first rod, so as to make the experimental demonstration of the simulated arm force more rigorous and scientific and meet the needs of teaching. Attached Figure Description
[0016] Figure 1 This is a force analysis device in one embodiment of the present disclosure.
[0017] Figure 2 This is a partial enlarged view of the force analysis device in one embodiment of this disclosure.
[0018] Figure 3 This is another partially enlarged view of the force analysis device in one embodiment of the present disclosure.
[0019] Figure 4 This is an exploded view of a portion of the structure of the force analysis device in one embodiment of this disclosure.
[0020] The diagram shows the following labels: 100, first rod; 110, first end of the first rod; 120, second end of the first rod; 130, first hook; 131, weight; 140, second hook; 200, second rod; 210, first end of the second rod; 220, second end of the second rod; 300, support component; 310, adapter plate; 400, force sensor; 500, traction line; 600, fixed pulley; 700, angle sensor; 710, first probe; 720, second probe; 810, angle disc; 910, moving part; 920, motor; 930, rack; 940, gear; 950, knob; 960, bracket. Detailed Implementation
[0021] It should be understood that the exemplary embodiments described herein should be considered descriptive only and not for limiting purposes. The description of features or aspects in each exemplary embodiment should generally be considered applicable to similar features or aspects in other exemplary embodiments.
[0022] The description provided with reference to the accompanying drawings is intended to aid in a full understanding of the various embodiments of the present invention as defined by the claims. It contains various specific details to aid this understanding, but these details should be considered merely exemplary. Accordingly, those skilled in the art will recognize that variations and modifications can be made to the various embodiments described herein without departing from the scope of the present invention as defined by the appended claims. Furthermore, descriptions of well-known functions and constructions may be omitted for clarity and brevity.
[0023] The terms and words used in the following description and claims are not limited to their literal meaning, but are used by the inventor only to allow for a clear and consistent understanding of the present invention. Accordingly, it will be apparent to those skilled in the art that the following description of various embodiments of the present invention is for illustrative purposes only and not to limit the present invention as defined by the appended claims.
[0024] Throughout the description and claims of this application, the words “comprising” and “containing”, as well as variations thereof such as “including” and “comprising”, mean “including but not limited to”, and are not intended to exclude other components, wholes or steps.
[0025] It should be understood that the singular forms “one,” “a,” and “the” include plural references unless the context explicitly specifies otherwise.
[0026] This disclosure provides a force analysis device, including a first rod 100, a second rod 200, a support member 300, a force sensor 400, a traction wire 500, and a fixed pulley 600. The second rod 200, the fixed pulley 600, and the force sensor 400 are respectively mounted on the support member 300. The first rod 100 and the second rod 200 are rotatably connected. One end of the traction wire 500 is connected to the first rod 100, and the other end of the traction wire 500 is connected to the force sensor 400. The traction wire 500 passes through the fixed pulley 600 to adjust its orientation. The support member 300 includes a bracket 960, the bottom of which is provided with a base for standing upright on a platform or similar structure.
[0027] It should be noted that the first lever 100 simulates the forearm, and the second lever 200 simulates the upper arm. One end of the traction cable 500 is connected to the first lever 100, and the other end is connected to the force sensor 400, allowing the traction cable 500 to transmit the force on the forearm to the force sensor 400. Furthermore, due to the action of the fixed pulley 600, the direction of the force changes, but the magnitude remains approximately the same. Therefore, the force on the forearm can be more accurately "transmitted" to the force sensor 400 through the traction cable 500.
[0028] It should be noted that the fixed pulley 600 refers to a pulley whose axle is fixed to the bracket 960 or other structure, and which can only change the direction of the force but not the magnitude of the force.
[0029] Specifically, in some embodiments, the traction line 500 passes through a fixed pulley 600 to adjust its orientation so that the orientation of the portion of the traction line 500 from the fixed pulley 600 to the force sensor 400 is the same as the force measurement direction of the force sensor 400. More specifically, the force sensor 400 has a measuring hook that hangs downwards, and the other side of the traction line 500 is hung on the measuring hook. After passing through the fixed pulley 600, the traction line 500's orientation changes to extend from bottom to top, that is, the orientation of the portion of the traction line 500 from the fixed pulley 600 to the force sensor 400 extends from bottom to top.
[0030] To facilitate understanding, the applicant will describe the force sensor 400 in some embodiments. First, some force sensors 400 include a sensing element, which is a component capable of sensing external forces and converting them into measurable signals. The sensing element may be, for example, a structure made of aluminum alloy, alloy steel, or stainless steel, or an elastic body (such as a spring). These sensing elements have a specific measurement direction, which should be the force measurement direction of the force sensor 400. If the applied force deviates from the force measurement direction of the force sensor 400, then the force acting on the force sensor 400 may not be accurately measured, resulting in a deviation.
[0031] In some embodiments, the second rod 200 is provided with a first probe 710 of an angle sensor 700 for measuring the angle of the second rod 200. It should be noted that, to avoid placing too much weight on the second rod 200, in some embodiments, only the first probe 710 of the angle sensor 700 may be placed on the second rod 200, while other parts of the angle sensor 700 (e.g., measurement circuitry, conversion elements, etc.) are placed on a desktop or platform. The first probe 710 can be electrically connected to the other parts of the angle sensor 700 via a wiring harness.
[0032] In some embodiments, the angle sensor 700 may be integrally mounted on the second rod 200.
[0033] To facilitate users in understanding the angle between the first rod 100 and the second rod 200, in some embodiments, an angle disc 810 is provided on the first rod 100. Furthermore, an angle sensor or a second probe 720 of the angle sensor 700 may be provided on the first rod 100 for measuring the angle of the first rod 100, wherein the second probe 720 shares a single angle sensor 700 with the first probe 710. This solution avoids placing the heavy angle sensor 700 on both the first rod 100 and the second rod 200, allowing the first rod 100 and the second rod 200 to respectively bear the weight of the first probe 710 and the second probe 720, thus reducing the load on the first rod 100 and the second rod 200. In addition, the second probe 720 can be electrically connected to other parts of the angle sensor 700 via a wiring harness.
[0034] In some embodiments, the force analysis device further includes an adapter plate 310, through which the second rod 200 and the fixed pulley 600 are respectively mounted on the bracket 960 of the support member 300. Specifically, the first rod 100 includes a first end 110 and a second end 120, the first end 110 of the first rod 100 is rotatably connected to the second rod 200, and the second end 120 of the first rod 100 is provided with a first hook 130. Since the second end 120 of the first rod 100 is provided with the first hook 130, the user can place heavy objects on the first hook 130 to simulate the load-bearing state of the forearm. In some embodiments, the weight 131 can be used as a load, and when in use, the weight 131 is hooked onto the first hook 130 of the second end 120 of the first rod to simulate the state of a person holding a heavy object.
[0035] In addition, since an angle sensor 700 and an angle disk 810 are provided near the first end 110 of the first rod (near the connection between the first rod 100 and the second rod 200), the angle data of the first rod 100 can be read and recorded intuitively.
[0036] In some embodiments, the connection point between one end of the traction line 500 and the first rod 100 is 0-20mm away from the connection point between the first rod 100 and the second rod 200. Specifically, the first rod 100 includes a first end 110 and a second end 120, the first end 110 of the first rod 100 is rotatably connected to the second rod 200, and the second end 120 of the first rod 100 is provided with a first hook 130. Furthermore, the second rod 200 includes a first end 210 and a second end 220, the first end 210 of the second rod is mounted on the adapter plate 310, and the second end 220 of the second rod is rotatably connected to the first end 110 of the first rod. The first rod 100 is provided with a second hook 140 0-20mm away from the first end 110 of the first rod, and one end of the traction line 500 is disposed on the second hook 140, thereby ensuring that the connection point between one end of the traction line 500 and the first rod 100 is 0-20mm away from the connection point between the first rod 100 and the second rod 200.
[0037] In some embodiments, such as Figure 4 As shown, the force sensor 400 is movable relative to the support member 300. Specifically, the force analysis device includes a movable member 910, the support member 300 includes a bracket 960, the force sensor 400 is disposed on the movable member 910, the bracket 960 is provided with a rack 930, and the movable member 910 is provided with a gear 940. The relative movement of the movable member 910 and the bracket 960 is driven by the meshing of the gear 940 and the rack 930. The movable member 910 also includes a knob 950 and / or a motor 920 for driving the gear 940 to move along the rack 930. The motor 920 is a stepper motor 920, and the gear 940 is a helical gear 940.
[0038] In some embodiments, the top of the bracket 960 is provided with a groove to receive the rack 930. An adapter plate is disposed in the middle of the bracket 960.
[0039] In use, the user can rotate the gear 940 via the knob 950 or the motor 920, thereby causing the gear 940 and the movable part 910 to move relative to the rack 930 and the bracket 960, ultimately allowing the force sensor 400 located on the movable part 910 to move relative to the support 300. Furthermore, in some embodiments, the output shaft of the stepper motor 920 can be controlled by software to rotate, thereby rotating the gear 940 and replacing manual operation of the knob 950 to move the movable part 910 up and down.
[0040] In practical use, users can manually turn the knob 950 to move the moving part 910 and the force sensor 400 up and down, and under the action of the traction line 500, the first rod 100 can be rotated to simulate the movement of a human arm (e.g., flexion and extension).
[0041] In some embodiments, the adapter plate is provided with a rotation axis (e.g., a fastener) for the second rod, allowing the second rod to rotate about the rotation axis.
[0042] The second rod 200 is adjustable within a range of 0° to 90°. It can be rotated to the desired angle and then tightened with fasteners (e.g., bolts, or a combination of bolts and nuts) to ensure it remains fixed. Specifically, the second rod 200 is mounted on the adapter plate 310 using bolts and nuts. Under normal conditions, the bolts and nuts do not press against the adapter plate 310, allowing the second rod 200 to rotate relative to the bolts. However, the user can tighten the bolts, causing the bolts and nuts to press firmly against the second rod 200 and the adapter plate 310, thus locking the second rod 200 onto the adapter plate 310 and maintaining its fixed position. Furthermore, in some embodiments, the adapter plate 310 is threaded for bolt tightening, eliminating the need for an additional nut. Additionally, the second end 220 of the second rod (i.e., the connection point between the second rod 200 and the first rod 100) can also be fixed with fasteners (such as bolts or a combination of bolts and nuts), and the bolts can be used as a rotation axis to rotate relative to the first rod.
[0043] During the up-and-down movement, the first hook 130 of the second end 120 of the first rod can hook a weight. Software can measure and display in real time the angle changes of the first rod 100, the force on the first rod 100, and the muscle changes of the second rod 200. Specifically, devices such as the force sensor 400 and angle sensor 700 can be connected to a computer signal and send the acquired data to the computer. The computer software uses this data to display the angle changes and force on the first rod 100 (which the software can simulate as a forearm) during the movement. The software can also record the up-and-down movement trajectory of the lifting assembly through the angle sensor 700, and control the stepper motor 920 to reproduce the recorded trajectory, thus presenting the muscle changes of the second rod 200 (which the software can simulate as an upper arm).
[0044] The above embodiments are only used to illustrate the technical solutions of this disclosure, and are not intended to limit it. Although this disclosure has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.
Claims
1. A force analysis device, characterized in that, The device includes a first rod, a second rod, a support member, a force sensor, a traction line, and a fixed pulley. The second rod, the fixed pulley, and the force sensor are respectively mounted on the support member. The first rod and the second rod are rotatably connected. One end of the traction line is connected to the first rod, and the other end of the traction line is connected to the force sensor. The traction line passes through the fixed pulley to adjust its orientation.
2. The force analysis device according to claim 1, characterized in that, The traction line passes through the fixed pulley to adjust its orientation so that the orientation of the portion of the traction line from the fixed pulley to the force sensor is the same as the force measuring direction of the force sensor; or the traction line passes through the fixed pulley to adjust its orientation so that the orientation of the portion of the traction line from the fixed pulley to the force sensor extends from bottom to top, and the measuring hook of the force sensor is set downwards.
3. The force analysis device according to claim 1, characterized in that, The second rod is equipped with an angle sensor or a first probe of the angle sensor for measuring the angle of the second rod.
4. The force analysis device according to claim 3, characterized in that, The first rod is equipped with an angle disc; and / or The first rod is equipped with an angle sensor or a second probe of the angle sensor for measuring the angle of the first rod, wherein the second probe and the first probe share an angle sensor.
5. The force analysis device according to claim 1, characterized in that, It also includes an adapter plate, on which the second rod and the fixed pulley are respectively mounted, and the adapter plate is mounted on the support member.
6. The force analysis device according to claim 1, characterized in that, The distance between the connection point of one end of the traction line and the first rod is 0-20mm from the connection point between the first rod and the second rod.
7. The force analysis device according to claim 1, characterized in that, The first rod includes a first end and a second end, the first end of the first rod is rotatably connected to the second rod, and the second end of the first rod is provided with a first hook.
8. The force analysis device according to claim 1, characterized in that, The force sensor is movable relative to the support member.
9. The force analysis device according to claim 8, characterized in that, It also includes a movable component, the support component includes a bracket, the force sensor is disposed on the movable component, the bracket is provided with a rack, and the movable component is provided with a gear, the relative movement of the movable component and the bracket is driven by the meshing of the gear and the rack.
10. The force analysis apparatus according to claim 9, characterized in that, The movable component also includes a knob and / or a motor for driving the gear to move along the rack.