Sit-and-reach testing device

Abstract

A seat body forward bending testing device comprises a bottom plate and a back plate, the back plate is hinged to one side of the bottom plate, a locking mechanism is arranged between the back plate and the bottom plate, the locking mechanism comprises a lock hole formed in the back plate, a rotary knob and a spring bolt, the rotary knob and the spring bolt are arranged on the bottom plate, and a transmission mechanism is arranged between the rotary knob and the spring bolt. When the back plate is overturned to be perpendicular to the bottom plate, the lock tongue can extend into the lock hole to fix the back plate on the bottom plate by rotating the knob in the forward direction, and the lock tongue can retreat from the lock hole to overturn and fold the back plate on the bottom plate by rotating the knob in the reverse direction. The sit-and-reach testing device can be conveniently and quickly assembled and stored.

Description

Technical Field

[0001] This utility model relates to the field of sports training equipment technology, specifically to a sit-and-reach test device. Background Technology

[0002] The sit-and-reach test is a physical fitness test item for primary, secondary, and tertiary schools. Its purpose is to measure the range of motion that the trunk, waist, hip, and other joints can achieve in a static state. It mainly reflects the extensibility and elasticity of the joints, ligaments, and muscles in these areas, as well as the development level of the body's flexibility.

[0003] Existing seated forward flexion testing devices generally include a base plate, a back plate, a measuring ruler, and a test slide. The back plate is vertically fixed to one side of the base plate by a locking component. The measuring ruler is detachably mounted on the back plate, and the test slide slides on the measuring ruler for the user to push.

[0004] However, existing sit-and-reach testing devices have the following technical problems: such as Figure 1 As shown, the locking components of the back plate 1a and the bottom plate 2a are generally screws 3a, and multiple screws 3a are required to secure them, making assembly and storage very inconvenient. Summary of the Invention

[0005] The technical problem to be solved by this utility model is to provide a seated forward bend testing device that can be easily and quickly assembled and stored.

[0006] The technical solution of this utility model is: a seated forward flexion testing device, including a base plate and a back plate. The back plate is hinged to one side of the base plate and a locking mechanism is provided between the two. The locking mechanism includes a lock hole provided on the back plate and a knob and a locking tongue provided on the base plate. A transmission mechanism is provided between the knob and the locking tongue. When the back plate is flipped so that it is perpendicular to the base plate, rotating the knob in the forward direction can cause the locking tongue to extend into the lock hole and fix the back plate on the base plate, while rotating the knob in the reverse direction can cause the locking tongue to exit the lock hole and flip the back plate over and fold it on the base plate.

[0007] With the above structure, this utility model has the following advantages:

[0008] This utility model of a seated forward flexion testing device hinges a backplate to a base plate. When the backplate is flipped to be perpendicular to the base plate, the latch on the base plate aligns with the lock hole on the backplate. At this point, simply rotating the knob allows the latch on the base plate to extend into the lock hole on the backplate, thus fixing the backplate vertically to the base plate. The entire assembly process of the backplate and base plate only requires flipping the backplate and rotating the knob, which is obviously much more convenient and faster than tightening multiple screws. In addition, when storing, simply rotating the knob in the opposite direction allows the latch on the base plate to disengage from the lock hole on the backplate, unlocking the backplate from the base plate and allowing it to be flipped and folded onto the base plate. Storage is very convenient and quick, and it occupies little space after storage.

[0009] Preferably, the transmission mechanism includes a gear that rotates synchronously with the knob and a rack that extends and retracts synchronously with the locking tongue, the gear and rack meshing together. This gear and rack transmission mechanism is simple in structure and can reliably remain in both the locked and unlocked positions.

[0010] Preferably, the knob is mounted on the top of the base plate, while the transmission mechanism and locking tongue are mounted on the bottom of the base plate. This layout is reasonable; mounting the knob on the top of the base plate facilitates its operation, while mounting the transmission mechanism and locking tongue on the bottom of the base plate allows them to be concealed, resulting in a simpler overall structure.

[0011] Preferably, a first guide structure is provided between the bolt and the bottom of the base plate to guide the bolt to align with the direction of the keyhole. This arrangement can position the bolt and the keyhole, enabling reliable locking and unlocking.

[0012] Preferably, the lock hole is located on the hinge side of the back plate. The first guide structure includes a guide hole located on the hinge side of the base plate. One end of the latch slides left and right within the guide hole, and the other end meshes with a gear via a rack. This first guide structure is simple and has a reasonable and compact layout with the transmission mechanism, providing a good and reliable fit. This allows the rotational motion of the gear to be reliably and stably converted into the extension and retraction motion of the latch.

[0013] Preferably, two lock tongues, two lock holes, and two guide holes are provided. This arrangement makes the locking between the back plate and the base plate more secure.

[0014] Preferably, the system also includes a connecting plate that connects the two latches. The connecting plate has a U-shaped clearance groove for accommodating the gear, and the rack is formed on one side of the U-shaped clearance groove. This arrangement uses the connecting plate to connect the latches so that they can extend and retract synchronously. Moreover, the U-shaped clearance groove on the connecting plate not only facilitates the installation of the gear using the space within the U-shaped clearance groove, but also facilitates the machining of the rack on the U-shaped groove. The overall layout is reasonable and compact, and it is convenient for the installation of each component.

[0015] Preferably, a second guide structure is provided between the bottom of the connecting plate and the bottom of the base plate. This arrangement allows the second guide structure to assist the first guide structure, making the bolt more accurately aligned with the keyhole.

[0016] Preferably, the second guide structure includes a guide post disposed on one of the connecting plate and the base plate, and a guide groove disposed on the other. When the latch slides left and right in the guide hole, the guide post slides left and right in the guide groove. This second guide structure is simple and very convenient to install and process.

[0017] Preferably, three guide posts are provided, and the three guide posts are not collinear. The number and position of the guide grooves are matched with the guide posts. Utilizing the principle that three points determine a plane, the fit between the guide posts and guide grooves is made more stable. Attached Figure Description

[0018] Figure 1 A schematic diagram of an existing sit-and-reach testing device;

[0019] Figure 2 This is a schematic diagram of the assembled seated forward flexion testing device of this utility model;

[0020] Figure 3 This is a schematic diagram of the seated forward flexion testing device of this utility model in its stored state;

[0021] Figure 4 This mainly shows a schematic diagram of the structure of the base plate and the back plate of this utility model;

[0022] Figure 5 This is an exploded view of the base plate and back plate of this utility model;

[0023] In the existing technical drawings: 1a - back plate, 2a - bottom plate, 3a - screw;

[0024] In the figures of this utility model: 1-base plate, 2-back plate, 3-lock hole, 4-knob, 5-lock tongue, 6-gear, 7-rack, 8-guide hole, 9-connecting plate, 10-U-shaped clearance groove, 11-guide post, 12-guide groove, 13-first rotating shaft, 14-first mounting base, 15-second mounting base, 16-second rotating shaft, 17-first groove, 18-second groove, 19-measuring ruler, 20-detection slide plate. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments. Example

[0026] like Figure 2-5 As shown, a seated forward flexion testing device includes a base plate 1 and a back plate 2. The back plate 2 is hinged to one side of the base plate 1 and a locking mechanism is provided between the two. The locking mechanism includes a lock hole 3 provided on the back plate 2, and a knob 4 and a locking tongue 5 provided on the base plate 1. A transmission mechanism is provided between the knob 4 and the locking tongue 5. When the back plate 2 is flipped so that it is perpendicular to the base plate 1, rotating the knob 4 in the forward direction can cause the locking tongue 5 to extend into the lock hole 3 and fix the back plate 2 on the base plate 1. Rotating the knob 4 in the reverse direction can cause the locking tongue 5 to exit the lock hole 3 and flip the back plate 2 onto the base plate 1. The device also includes a measuring ruler 19 detachably installed on the back plate 2 and a detection slide plate 20 that slides on the measuring ruler 19 and can be pushed by a person.

[0027] The transmission mechanism includes a gear 6 that rotates synchronously with the knob 4 and a rack 7 that extends and retracts synchronously with the locking tongue 5. The gear 6 and rack 7 mesh with each other. The transmission mechanism using gear 6 and rack 7 has a simple structure and can reliably stay in the locked and unlocked positions.

[0028] The knob 4 is mounted on the top of the base plate 1, while the transmission mechanism and locking tongue 5 are mounted on the bottom of the base plate 1. This layout is reasonable. Mounting the knob 4 on the top of the base plate 1 makes it easy to operate, while mounting the transmission mechanism and locking tongue 5 on the bottom of the base plate 1 allows them to be hidden, resulting in a simpler overall structure.

[0029] A first guide structure is also provided between the bolt 5 and the bottom of the base plate 1 to guide the bolt 5 to align with the lock hole 3. This setting can position the bolt 5 and the lock hole 3, so that they can be reliably locked and unlocked.

[0030] The lock hole 3 is located on the hinge side of the back plate 2. The first guide structure includes a guide hole 8 located on the hinge side of the base plate 1. One end of the lock tongue 5 slides left and right within the guide hole 8, and the other end meshes with the gear 6 via the rack 7. This first guide structure is simple and has a reasonable and compact layout with the transmission mechanism, and a good and reliable fit, so that the rotational motion of the gear 6 can be stably and reliably converted into the extension and retraction motion of the lock tongue 5.

[0031] Two lock tongues (5), two lock holes (3), and two guide holes (8) are provided. This arrangement makes the locking between the back plate (2) and the base plate (1) more secure.

[0032] It also includes a connecting plate 9 that connects the two locking tongues 5. The connecting plate 9 has a U-shaped clearance groove 10 for accommodating the gear 6, and a rack 7 is formed on one side of the U-shaped clearance groove 10. This arrangement uses the connecting plate 9 to connect the locking tongues 5 so that they can extend and retract synchronously. Moreover, the U-shaped clearance groove 10 on the connecting plate 9 not only facilitates the installation of the gear 6 using the space within the U-shaped clearance groove 10, but also facilitates the machining of the rack 7 on the U-shaped groove. The overall layout is reasonable and compact, and it is convenient for the installation of each component.

[0033] A second guide structure is also provided between the bottom of the connecting plate 9 and the bottom of the base plate 1. This arrangement allows the second guide structure to assist the first guide structure, making the bolt 5 more accurately aligned with the lock hole 3.

[0034] The second guide structure includes a guide post 11 disposed on one of the connecting plate 9 and the base plate 1, and a guide groove 12 disposed on the other. When the locking tongue 5 slides left and right in the guide hole 8, the guide post 11 slides left and right in the guide groove 12. This second guide structure is simple and very convenient to install and process.

[0035] Three guide posts 11 are provided, and the three guide posts 11 are not collinear. The number and position of the guide grooves 12 are matched with the guide posts 11. By utilizing the principle that three points determine a plane, the fit between the guide posts 11 and the guide grooves 12 is made more stable.

[0036] It also includes a first rotating shaft 13 that is vertically and rotatably mounted on the base plate 1, with a knob 4 mounted on the upper end of the first rotating shaft 13 and a gear 6 mounted on the lower end of the first rotating shaft 13. This arrangement facilitates the synchronous rotation of the knob 4 and the gear 6.

[0037] A first mounting base 14 and a second mounting base 15 are provided at intervals on the hinge side of the base plate 1. A second rotating shaft 16 is provided between the first mounting base 14 and the second mounting base 15, and the back plate 2 is rotatably mounted on the second rotating shaft 16. This hinge structure is simple and easy to implement.

[0038] The back plate 2 is provided with a first groove 17 for accommodating the knob 4, so that the knob 4 can be embedded in the first groove 17 when the back plate 2 is flipped and folded on top of the base plate 1. This arrangement allows the back plate 2 to fit tightly together after being folded to the base plate 1.

[0039] The bottom of the base plate 1 is provided with a second groove 18 for mounting the latch 5 and the transmission mechanism. This arrangement creates mounting space for the latch 5 and the transmission mechanism at the bottom of the base plate 1, resulting in better concealment.

[0040] The working principle of the sit-and-reach test device in this embodiment is as follows:

[0041] When the back plate 2 is flipped to be perpendicular to the base plate 1, the latch 5 on the base plate 1 aligns with the lock hole 3 on the back plate 2. At this time, rotating the knob 4 forward causes the gear 6 to rotate, which in turn drives the meshing rack 7 to move. Under the guidance of the first and second guide structures, the rotational motion of the gear 6 is converted into the extension and retraction motion of the latch 5. The latch 5 on the base plate 1 extends into the lock hole 3 of the back plate 2, allowing the back plate 2 to be vertically fixed to the base plate 1. Figure 4 As shown, the entire assembly process of the back plate 2 and the base plate 1 only requires flipping the back plate 2 and rotating the knob 4, which is obviously much more convenient and faster than tightening multiple screws. After installing the back plate 2 and the base plate 1, install the measuring ruler 19 on the back plate 2, and then install the detection slide plate 20 on the measuring ruler 19, as shown. Figure 2 As shown; when storage is required, remove the measuring ruler 19 and the testing slide plate 20, then simply rotate the knob 4 in the opposite direction to disengage the locking tongue 5 on the base plate 1 from the locking hole 3 of the back plate 2, thus unlocking the back plate 2 from the base plate 1. Then, flip and fold the back plate 2 over onto the top of the base plate 1, with the knob 4 embedded in the first groove 17 of the back plate 2, allowing the back plate 2 to fit tightly against the base plate 1. Figure 3 As shown, storage is also very convenient and quick, and it takes up little space after storage.

Claims

1. A sit-and-reach test device, comprising a base plate (1) and a back plate (2), characterized in that: The back plate (2) is hinged to one side of the base plate (1) and a locking mechanism is provided between the two. The locking mechanism includes a lock hole (3) on the back plate (2) and a knob (4) and a latch (5) on the base plate (1). A transmission mechanism is provided between the knob (4) and the latch (5). When the back plate (2) is flipped so that it is perpendicular to the base plate (1), rotating the knob (4) in the forward direction can cause the latch (5) to extend into the lock hole (3) and fix the back plate (2) on the base plate (1). Rotating the knob (4) in the reverse direction can cause the latch (5) to exit the lock hole (3) and flip the back plate (2) onto the base plate (1).

2. The sit-and-reach test device according to claim 1, characterized in that: The transmission mechanism includes a gear (6) that rotates synchronously with the knob (4) and a rack (7) that extends and retracts synchronously with the locking tongue (5), wherein the gear (6) and the rack (7) mesh.

3. The sit-and-reach test device according to claim 2, characterized in that: The knob (4) is mounted on the top of the base plate (1) and the transmission mechanism and the locking tongue (5) are mounted on the bottom of the base plate (1).

4. The sit-and-reach test device according to claim 3, characterized in that: A first guide structure is also provided between the latch (5) and the bottom of the base plate (1) to guide the latch (5) to align with the direction of the lock hole (3).

5. The sit-and-reach test device according to claim 4, characterized in that: The lock hole (3) is located on the side of the hinge side of the back plate (2). The first guide structure includes a guide hole (8) located on the hinge side of the base plate (1). One end of the lock tongue (5) slides left and right in the guide hole (8) and the other end meshes with the gear (6) through the rack (7).

6. The sit-and-reach test device according to claim 5, characterized in that: Two lock tongues (5), two lock holes (3), and two guide holes (8) are provided.

7. A seated forward flexion testing device according to claim 6, characterized in that: It also includes a connecting plate (9) connecting the two locking tongues (5), the connecting plate (9) having a U-shaped clearance groove (10) for accommodating the gear (6), and the rack (7) being formed on one side of the U-shaped clearance groove (10).

8. The sit-and-reach test device according to claim 7, characterized in that: A second guide structure is also provided between the bottom of the connecting plate (9) and the bottom of the base plate (1).

9. A seated forward flexion testing device according to claim 8, characterized in that: The second guide structure includes a guide post (11) disposed on one of the connecting plate (9) and the base plate (1) and a guide groove (12) disposed on the other. When the locking tongue (5) slides left and right in the guide hole (8), the guide post (11) slides left and right in the guide groove (12).

10. A seated forward flexion testing device according to claim 9, characterized in that: The guide posts (11) are provided in three parts and the three guide posts (11) are not collinear. The number and position of the guide grooves (12) are matched with the guide posts (11).

Images