Sitting body forward bending device

Abstract

The invention relates to the technical field of testing devices, in particular to a sitting body forward bending device which comprises a bottom plate and a pedal vertically arranged at one end of the bottom plate, a limiting assembly is arranged in the middle of the upper end face of the bottom plate and comprises two symmetrically-arranged limiting pieces, and a driving piece is arranged on the bottom plate. The driving part is used for controlling the two limiting parts to move oppositely or oppositely, racks are arranged on the bottom plate, the limiting parts comprise limiting plates, first rotating shafts are rotationally connected to the limiting plates, lower gears in meshing transmission with the racks are coaxially arranged on the first rotating shafts, and second rotating shafts in transmission with the first rotating shafts are arranged on the limiting plates. According to the invention, the two limiting pieces move oppositely to limit the thigh of a user from expanding outwards, the lower end of the rotating rod swings downwards to press the upper end of the thigh of the user, and the knee can be prevented from bending through the limiting assembly, so that the measurement precision is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of testing devices, and particularly to a sit-and-reach device. Background Art

[0002] For many years, the measurement of flexibility has generally been mainly based on the sit-and-reach measurement method. In the existing sit-and-reach tests, the legs are straightened, the feet are against the abutment board, the arms are stretched forward, and the point where the fingers are level with the soles of the feet is used as the base point.

[0003] For example, on October 22, 2024, a sit-and-reach device with a publication number of CN221865694U was disclosed. It includes a bottom plate, an adjustment component, and a storage component. A U-shaped plate is provided on the top of the bottom plate, and a hole is opened on the top of the bottom plate. The adjustment component is arranged on the bottom plate. The storage component includes a folding plate, and a folding plate is hinged and installed on one side of the bottom plate. The sit-and-reach device is convenient for testing the flexibility of users; however, the applicant found that when users perform sit-and-reach tests with their knees bent, the test data is not accurate enough and the measurement accuracy is limited. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a sit-and-reach device to solve the problem of limited measurement accuracy.

[0005] Based on the above purpose, the present invention provides a sit-and-reach device, which includes a bottom plate, a pedal vertically arranged at one end of the bottom plate, a guide bar installed at the upper end of the pedal, a guide rail arranged on the guide bar, a push plate slidably connected to the guide rail, a scale arranged on the guide bar parallel to the guide rail, a limiting component arranged in the middle of the upper end surface of the bottom plate. The limiting component includes two limiting members symmetrically arranged about the extension line of the guide bar. A driving member is arranged on the bottom plate, and the driving member is used to control the two limiting members to move towards each other or move in the opposite direction. A chute perpendicular to the guide bar is opened on the bottom plate, a rack is arranged in the chute. The limiting member includes a limiting plate slidably connected to the chute. A first rotating shaft is rotatably connected to the limiting plate. A lower gear meshing and drivingly connected to the rack is coaxially arranged on the first rotating shaft. A second rotating shaft drivingly connected to the first rotating shaft is rotatably connected to the upper part of the limiting plate. A rotating rod is fixed on the side wall of the second rotating shaft, and the rotating rod is arranged on one side where the two limiting plates face each other.

[0006] Optionally, a pressing plate is connected to the lower end of the rotating rod.

[0007] Optionally, at least two vertical rails are vertically arranged on the side wall of the limiting plate, and a slider connected to the end of the pressing plate is slidably connected in the vertical rails.

[0008] Optionally, a supporting plate is arranged at the upper end of the limiting plate.

[0009] Optionally, the first rotating shaft and the second rotating shaft are connected by a transmission belt.

[0010] Optionally, between the two limiting plates and on the opposite sides of the two limiting plates, a multi-section telescopic plate is provided between each end of the sliding groove. The multi-section telescopic plate is provided at the opening of the sliding groove.

[0011] Optionally, a receiving groove for receiving the lower gear is formed in the middle of the lower end surface of the limiting plate.

[0012] Optionally, the driving member includes two moving telescopic rods. The telescopic ends of the two moving telescopic rods are respectively connected to the two limiting plates. The two moving telescopic rods extend or contract to control the two limiting plates to move towards each other or move in opposite directions.

[0013] Optionally, the driving member includes a driving motor. The output end of the driving motor is connected to a driving rotating shaft. Two threaded sections with opposite thread directions are provided on the driving rotating shaft. A sliding sleeve block slidably matched with the sliding groove is provided on the threaded section. The two sliding sleeve blocks are respectively connected to the two limiting plates.

[0014] Advantages of the present invention: A sit-and-reach device provided by the present invention. The user sits on the bottom plate with the legs straight and the feet against the pedal. After the user sits well and before performing the sit-and-reach, the driving member is activated to control the two limiting members to move towards each other until the opposite sides of the two limiting members abut against the outer sides of the user's thighs. In addition, when the limiting member moves, since the lower gear on the limiting plate is in meshing transmission connection with the rack in the sliding groove, the lower gear and the first rotating shaft are driven to rotate, driving the second rotating shaft to rotate and the rotating rod to swing. The lower end of the rotating rod swings downward to press the upper end of the user's thigh, fixing the user's thigh. Then the user can stretch the arms forward and push the push plate for testing. The knee can be prevented from bending through the limiting component, thereby ensuring the subsequent measurement accuracy. Description of the Drawings

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only the embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0016] Figure 1 It is a schematic structural diagram of the present invention; Figure 2 It is a top view structural diagram of the present invention; Figure 3Schematic diagram of the limiting component of the present invention.

[0017] In the figure: 1, bottom plate; 2, pedal; 3, reinforcement plate; 4, guide bar; 5, scale; 6, push plate; 7, limiting plate; 8, driving member; 9, chute; 10, lower gear; 11, rack; 12, first rotating shaft; 13, second rotating shaft; 14, transmission belt; 15, pressing plate; 16, rotating rod; 17, supporting plate. Specific embodiments

[0018] In order to make the objectives, technical solutions and advantages of the present invention more clear and understandable, the present invention will be further described in detail below with reference to specific embodiments and the accompanying drawings.

[0019] It should be noted that unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present invention should be the ordinary meanings understood by those of ordinary skill in the field to which the present invention belongs. The "first", "second" and similar terms used in the present invention do not denote any order, quantity or importance, but are only used to distinguish different components. The terms such as "comprising" or "including" mean that the elements or objects appearing before this word cover the elements or objects listed after this word and their equivalents, without excluding other elements or objects. The terms such as "connected" or "coupled" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The terms such as "upper", "lower", "left", "right" are only used to represent relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0020] As Figures 1 to 3As shown, a sitting forward bending device comprises a base plate 1, a pedal 2 is vertically arranged on one end of the base plate 1, both side walls of the pedal 2 are connected to the base plate 1 through a reinforcing plate 3, a guide bar 4 is installed on the upper end of the pedal 2, a guide rail is arranged on the guide bar 4, a push plate 6 is slidably connected to the guide rail, the guide bar 4 is provided with a scale 5 arranged parallel to the guide rail, a limiting component is arranged in the middle of the upper end surface of the base plate 1, the limiting component comprises two limiting members symmetrically arranged about the extension line of the guide bar 4, a driving member 8 is arranged on the base plate 1, and the driving member 8 is used to control the two limiting members to move toward or in the opposite direction, and the base plate 1 is opened A slide groove 9 is provided which is vertically arranged with the guide bar 4, a rack 11 is arranged in the slide groove 9, the limiting member includes a limiting plate 7 which is slidably connected with the slide groove 9, a first rotating shaft 12 is rotatably connected with the limiting plate 7, a lower gear 10 which is meshing and transmission-connected with the rack 11 is coaxially arranged with the first rotating shaft 12, a second rotating shaft 13 which is transmission-connected with the first rotating shaft 12 is rotatably connected with the upper part of the limiting plate 7, the first rotating shaft 12 and the second rotating shaft 13 are transmission-connected by a transmission belt 14, the rotating rod 16 is fixed on the side wall of the second rotating shaft 13, and the rotating rod 16 is arranged on the side where the two limiting plates 7 are arranged facing each other.

[0021] The user sits on the base plate 1 with legs straight and feet against the pedals 2. After the user is seated, before doing sit-up forward flexion, the driving member 8 is started to control the two limiting members to move toward each other until the opposite sides of the two limiting members are against the outer side of the user's thigh. In addition, when the limiting members move, the lower gear 10 on the limiting plate 7 is meshed with the rack 11 in the slide groove 9, which drives the lower gear 10 and the first rotating shaft 12 to rotate, drives the second rotating shaft 13 to rotate and the rotating rod 16 to swing. The lower end of the rotating rod 16 swings downward to press the upper end of the user's thigh. After fixing the user's thigh, the user can stretch his arms forward and push the push plate 6 for testing. The limiting component can prevent the knees from bending, thereby ensuring the accuracy of subsequent measurements.

[0022] The lower end of the rotating rod 16 is slidably connected to a pressure plate 15, and the upper end of the pressure plate 15 is provided with a sliding groove, in which a sliding block rotatably connected to the rotating rod 16 is slidably provided, and a buffer pad is provided on the lower end surface of the pressure plate 15 and the side facing the two limiting plates 7, and the buffer pad is filled with sponge, so that the pressure plate 15 can elastically press the user's thigh downward, and the side facing the two limiting plates 7 can elastically press the outer side of the user's thigh.

[0023] At least two vertical rails are vertically arranged on the side wall of the limiting plate 7, and a slider connected to the end of the pressing plate 15 is slidably connected in the vertical rail, so as to drive the pressing plate 15 to move vertically downward when the rotating rod 16 swings downward.

[0024] A handrail 17 is provided at the upper end of the limiting plate 7. The provision of the handrail 17 facilitates the user to stand up or sit down using the handrail 17.

[0025] Multi - joint expansion plates are provided between the two limiting plates 7 and between the two opposite sides of the two limiting plates 7 and both ends of the sliding groove 9 respectively. The multi - joint expansion plates are arranged at the opening of the sliding groove 9. When the limiting plate 7 moves, sundries in the environment will not fall into the sliding groove 9, reducing the possibility of affecting the movement of the limiting plate 7.

[0026] A receiving groove for receiving the lower gear 10 is formed in the middle of the lower end face of the limiting plate 7.

[0027] In order to facilitate controlling the two limiting plates 7 to move towards each other to restrict the user's thighs, the driving member 8 may include two movable telescopic rods. The telescopic ends of the two movable telescopic rods are respectively connected to the two limiting plates 7. The two movable telescopic rods extend or contract to control the two limiting plates 7 to move towards each other or in opposite directions.

[0028] The above - mentioned driving member 8 is replaceable. The driving member 8 may also be a driving motor. The output end of the driving motor is connected to a driving rotating shaft. Two threaded sections with opposite thread directions are provided on the driving rotating shaft. Sliding sleeve blocks that are slidably matched with the sliding groove 9 are provided on the threaded sections. The two sliding sleeve blocks are respectively connected to the two limiting plates 7.

[0029] Those of ordinary skill in the art should understand that: the discussion of any of the above embodiments is only exemplary and is not intended to imply that the scope of the present invention is limited to these examples. The present invention is not limited to the above - mentioned embodiments, that is, it does not mean that the present invention must rely on the above - mentioned methods and structures to be implemented; under the concept of the present invention, the technical features in the above - mentioned embodiments or different embodiments can also be combined, and the steps can be implemented in any order, and there are many other variations in different aspects of the present invention as described above. For the sake of brevity, they are not provided in detail.

[0030] The embodiments of the present invention are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A sitting forward bending device, comprising a base plate, a pedal vertically arranged on one end of the base plate, characterized in that: The top end of the pedal is installed with a guide bar, and the guide bar is provided with a push plate, and the guide bar is provided with a ruler arranged parallel to the guide rail, and a limiting component is provided in the middle of the upper end surface of the bottom plate, and the limiting component includes two limiting members symmetrically arranged about the extension line of the guide bar, and the bottom plate is provided with a driving member for controlling the two limiting members to move towards or oppositely. The bottom plate is provided with a slide groove which is perpendicular to the guide bar, and a rack is provided in the slide groove, and the limiting member includes a limiting plate which is slidably connected to the slide groove, and the limiting plate is rotatably connected to the first rotating shaft, and the first rotating shaft is coaxially provided with a lower gear which is meshed with the rack for transmission connection, and the upper part of the limiting plate is rotatably connected to the second rotating shaft which is transmission-connected to the first rotating shaft, and the rotating rod is fixed on the side wall of the second rotating shaft, and the rotating rod is arranged on one side of the two limiting plates which are arranged facing each other.

2. A sitting forward flexion device according to claim 1, characterized in that: The lower end of the rotating rod is connected with a pressing plate.

3. A sitting forward flexion device according to claim 2, characterized in that: At least two vertical rails are vertically arranged on the side wall of the limiting plate, and a sliding block connected to the end of the pressing plate is slidably connected in the vertical rail.

4. A sitting forward flexion device according to claim 1, characterized in that: A supporting plate is arranged on the upper end of the limiting plate.

5. The sitting forward flexion device according to claim 1, characterized in that: The first rotating shaft is connected to the second rotating shaft via a transmission belt.

6. The sitting forward flexion device according to claim 1, characterized in that: A multi-section telescopic plate is arranged between the two limiting plates and between the opposite sides of the two limiting plates and the two ends of the slide groove, and the multi-section telescopic plate is arranged at the opening of the slide groove.

7. The sitting forward flexion device according to claim 1, characterized in that: A receiving groove for receiving the lower gear is provided in the middle of the lower end surface of the limiting plate.

8. The sitting forward flexion device according to claim 1, characterized in that: The driving member comprises two movable telescopic rods, the telescopic ends of the two movable telescopic rods are respectively connected to the two limiting plates, and the extension or contraction of the two movable telescopic rods is used to control the two limiting plates to move towards or in the opposite direction.

9. The sitting forward flexion device according to claim 1, characterized in that: The driving member includes a driving motor, the output end of the driving motor is connected to a driving shaft, the driving shaft is provided with two threaded sections with opposite thread directions, the threaded sections are provided with sliding sleeves that slide with the sliding grooves, and the two sliding sleeves are respectively connected to the two limiting plates.

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