A mechanical sit-and-reach test device capable of regulating posture

Abstract

The present invention relates to the technical field of physical education teaching equipment, and discloses a mechanical sit-and-reach test device that can standardize posture. It has been observed that the main manifestation of the test subject's irregular posture is that the legs appear bent during the test. The present invention can achieve the purpose of limiting the push plate and preventing it from being pushed when the test subject's legs are bent, and can better standardize the test subject's posture. The device includes a base, a scoreboard, a push plate, a lever with adjustable length, a pressure plate, a motion control module, and a limit plate. The motion control module includes a constraint block, a support plate, a rotating plate, a connecting rod, and a spring. The present invention adjusts the lever length so that the pressure plate is located below the test subject's popliteal fossa. When the test subject straightens his legs, the pressure plate is pressed downward, and the limit plate is controlled by the motion control module to move away from the push plate. At this time, the push plate can slide on the scoreboard. When the test subject's legs are bent, the limit plate will limit the movement of the push plate, making it impossible to push the push plate.

Description

Technical Field

[0001] The invention relates to the technical field of sports teaching equipment, in particular to a mechanical sit-and-reach test device capable of regulating posture. Technical Background

[0002] The sit-and-reach exercise is a widely used fitness test at all levels of learning. Standardized movement is a fundamental prerequisite for this exercise. During the actual test, teachers typically observe students to ensure their posture is correct. However, some students' posture is not standardized, rendering the sit-and-reach exercise meaningless. This incorrect posture is primarily manifested by the legs appearing bent during the test. Summary of the Invention

[0003] The present invention adopts the lever principle, uses the tester's legs straightening to drive the pressure plate to move downward as power input, and controls the limit plate to unlock the push plate through the motion control module, so that the results can only be recorded when the tester's legs are in a straight state during the test.

[0004] The present invention is implemented by the following technical solution: a mechanical sit-and-reach test device with standardized posture, whose structure includes: a base, a scoring board, a push plate, a motion control module, a limit plate, a lever, a constraint block, and a pressure plate, characterized in that: the score plate is fixedly mounted on the base; the push plate can slide on the score plate; a rectangular through hole is provided on the score plate; the limit plate is mounted on the motion control module and can rotate around its own center hole and is provided with a row of tooth-shaped protrusions on one side; the rectangular through hole of the score plate can accommodate the up and down movement of the tooth-shaped protrusions of the limit plate; the motion control module is fixed on the base; one end of the lever passes through the motion control module, and the other end is connected to the pressure plate, and the lever is formed with the constraint block as a fulcrum; the constraint block is fixed to the base by bolts.

[0005] Furthermore, the motion control module includes a support plate, a rotating block, a spring, and a connecting rod; the support plate is connected to the base by screws; the limit plate and the rotating block rotate around the center hole on the support plate; the connecting rod is hinged to the rotating block and the limit plate; one end of the lever passes through the hole on one side of the rotating block, and the hole diameter is slightly larger than the lever diameter; the two ends of the spring are respectively connected to the rotating block and the support plate.

[0006] Furthermore, a guide groove is provided on the scoreboard, and a plurality of protrusions are provided under the push plate to facilitate the installation of the push plate.

[0007] Furthermore, the scoreboard is provided with a scale for recording scores.

[0008] Furthermore, the length of the lever is adjustable, and the length can be adjusted according to the tester's needs before use, and is suitable for all age groups.

[0009] Furthermore, the pressure plate is provided with a cavity groove, which makes connection and disassembly with the lever more convenient.

[0010] Furthermore, a foot plate is provided on the base.

[0011] When the present invention is in use, the soles of the tester's feet fit against the footrest plate, and the length of the lever is adjusted according to their own needs so that the pressure plate is below the popliteal fossa. Straightening the legs will drive the pressure plate to move downward, and the movement is transmitted to the motion control module through the lever. The motion control module controls the limit plate to rotate clockwise, and the toothed protrusion of the limit plate is away from the protrusion below the push plate. At this time, the push plate can slide along the scoreboard under the push of the tester and record the score. If the tester's legs are bent, under the action of the spring force, the motion control module will control the limit plate to rotate counterclockwise, and the toothed protrusion of the limit plate will be stuck with the protrusion below the push plate. At this time, the push plate will be limited and cannot slide on the scoreboard.

[0012] The present invention has the following beneficial effects: when used, the tester can be tested and scores recorded normally with their legs straight; however, scores cannot be recorded when the tester's legs are bent, effectively standardizing the test posture. The present invention is implemented purely mechanically, is energy-efficient and environmentally friendly, and does not rely on electricity. The lever length is adjustable, making it suitable for testers of all ages and has a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall assembly of the present invention.

[0014] Figure 2 This is a schematic diagram of the lever and pressure plate assembly.

[0015] Figure 3 Schematic diagram of the limiting plate structure.

[0016] Figure 4 It is a partial schematic diagram of the push plate in the limited state.

[0017] Figure 5 This is a partial schematic diagram of the push plate when it is unlocked.

[0018] In the figure: base 1, foot plate 1-1, scoring plate 2, guide groove 2-1, rectangular through hole 2-2, push plate 3, push plate protrusion 3-1, support plate 4, rotating block 5, spring, limit plate 7, toothed protrusion 7-1, connecting rod 8, lever 9, constraint block 10, pressure plate 11, cavity groove 11-1. DETAILED DESCRIPTION

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] See also Figures 1 to 5 The present invention provides a technical solution for a mechanical sit-and-reach test device with standardized posture, comprising: a base 1, a scoring board 2, a push plate 3, a motion control module, a limit plate 7, a lever 9, a constraint block 10, and a pressure plate 11, characterized in that: the scoring board 2 is fixedly mounted on the base 1; the push plate 3 can slide on the scoring board 2; a rectangular through hole 2-2 is provided on the scoring board 2; the limit plate 7 is mounted on the motion control module and can rotate around its own center hole, and is provided with a row of tooth-shaped protrusions 7-1 on one side; the rectangular through hole 2-2 of the scoring plate can accommodate the up and down movement of the toothed protrusions 7-1 of the limit plate; the motion control module is fixed on the base 1; one end of the lever 9 passes through the motion control module, and the other end is connected to the pressure plate 11, and a lever is formed with the constraint block 10 as a fulcrum; the constraint block 10 is fixed to the base 1 by bolts.

[0021] The motion control module includes a support plate 4, a rotating block 5, a spring, and a connecting rod 8; the support plate 4 is connected to the base 1 by screws; the limit plate 7 and the rotating block 5 rotate around the center hole on the support plate 4; the connecting rod 8 is hinged to the rotating block 5 and the limit plate 7; one end of the lever 9 passes through the hole on one side of the rotating block 5, and the hole diameter is slightly larger than the lever diameter; the two ends of the spring are respectively connected to the rotating block 5 and the support plate 4.

[0022] The scoring board 2 is provided with a guide groove 2 - 1 , and a plurality of push plate protrusions 3 - 1 are provided below the push plate 3 to facilitate the installation of the push plate 3 .

[0023] The scoreboard 2 is provided with a scale for recording the tester's score.

[0024] The length of the lever 9 is adjustable and can be adjusted according to the tester's needs before use. It is suitable for all age groups.

[0025] like Figure 2 As shown, the pressing plate 11 is provided with a cavity groove 11 - 1 , which makes connection with and removal from the lever 9 more convenient.

[0026] A foot support plate 1-1 is provided on the base.

[0027] When the present invention is in use, the sole of the tester fits against the footrest plate 1-1, and the length of the lever 9 is adjusted according to one's own needs so that the pressure plate 11 is below the popliteal fossa. Under the action of the spring force, the lever 9 is in a horizontal position, and the limit plate 7 clamps the push plate 3 and cannot slide on the scoreboard 2. When the tester's legs are straightened, the pressure plate 11 will be driven to move downward, and the movement is transmitted to the motion control module through the lever 9. The motion control module controls the limit plate 7 to rotate clockwise, and the toothed protrusion 7-1 of the limit plate 7 is away from the protrusion 3-1 below the push plate. At this time, the push plate 3 can slide along the scoreboard 2 under the push of the tester and record the score. If the tester's legs are bent, under the action of the spring, the motion control module will control the limit plate 7 to rotate counterclockwise, and the toothed protrusion 7-1 of the limit plate will clamp the protrusion 3-1 below the push plate. At this time, the push plate 3 will be limited and cannot slide on the scoreboard 2.

[0028] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A mechanical sit-and-reach test device capable of regulating posture, comprising: A base (1), a scoring plate (2), a push plate (3), a motion control module, a limit plate (7), a lever (9), a constraint block (10), and a pressure plate (11), characterized in that: the scoring plate (2) is fixedly mounted on the base (1); the push plate (3) can slide on the scoring plate (2); the scoring plate (2) is provided with a rectangular through hole (2-2); the limit plate (7) is mounted on the motion control module and can rotate around its own center hole, and is provided with a row of tooth-shaped protrusions (7-1) on one side; the rectangular through hole (2-2) of the scoring plate can accommodate the limit plate tooth-shaped protrusions (7-1) to move up and down; the motion control module is fixed on the base (1); one end of the lever (9) passes through the motion control module, and the other end is connected to the pressure plate (11), and a lever is formed with the constraint block (10) as a fulcrum; the constraint block (10) is fixed to the base (1) by bolts.

2. The mechanical sit-and-reach test device capable of regulating posture according to claim 1, characterized in that: The motion control module comprises a support plate (4), a rotating block (5), a spring, and a connecting rod (8); the support plate (4) is connected to the base (1) by screws; the limit plate (7) and the rotating block (5) rotate around the center hole on the support plate (4); the connecting rod (8) is hinged to the rotating block (5) and the limit plate (7); one end of the lever (9) passes through a hole on one side of the rotating block (5), and the hole diameter is slightly larger than the lever diameter; and the two ends of the spring are respectively connected to the rotating block (5) and the support plate (4).

3. The mechanical sit-and-reach test device capable of regulating posture according to claim 1, characterized in that: A guide groove (2-1) is provided on the scoring board (2), and a plurality of push plate protrusions (3-1) are provided below the push plate (3) to facilitate installation of the push plate (3).

4. The mechanical sit-and-reach test device capable of regulating posture according to claim 1, characterized in that: The scoreboard (2) is provided with a scale.

5. The mechanical sit-and-reach test device capable of standardizing posture according to claim 1, characterized in that: The lever (9) is adjustable in length and can be adjusted according to the tester's needs before use, and is suitable for all age groups.

6. The mechanical sit-and-reach test device capable of regulating posture according to claim 1, characterized in that: The pressing plate (11) is provided with a cavity groove (11-1), which makes connection with and disassembly of the lever (9) more convenient.

7. The mechanical sit-and-reach test device capable of regulating posture according to claim 1, characterized in that: A foot plate (1-1) is provided on the base.

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