A horizontal bar with an adjustment mechanism for students' physical fitness test

Abstract

The present invention relates to the field of physical fitness testing technology, specifically a horizontal bar with an adjustment mechanism for student physical fitness testing, comprising a base; a support frame, the support frame is installed around the top of the base; a lever, the lever is arranged above the base; a switch, the switch is installed on the outside of one group of the support frames; an adjustment component, the adjustment component is arranged between the support frame and the connecting plate. The present invention can simultaneously drive the screws on both sides to rotate synchronously through the arrangement of the transmission gear and the pulley transmission assembly, so that the lever can move up and down stably, thereby greatly improving the ease of use and applicability. At the same time, the lever is driven to perform an adjustment operation through the up and down movement of the connecting block, so that students with different heights can smoothly participate in the test, avoiding damage to students and unfair things.

Description

Technical Field

[0001] The invention relates to the technical field of physical fitness testing, in particular to a horizontal bar with an adjusting mechanism for physical fitness testing of students. Background Art

[0002] The physical fitness test for students is a training method to encourage students to actively participate in physical exercise, develop the habit of regular physical exercise, and improve their self-care ability and physical health level. The physical fitness test for students includes 50-meter run for boys and girls, sit-ups, standing long jump, pull-ups for boys, sit-ups for girls, 1000-meter run for boys and 800-meter run for girls. When doing the pull-up test, a horizontal bar is needed to assist students in operating training.

[0003] The existing horizontal bar has a fixed height. Due to the different heights of students, some shorter students have difficulty in doing the bar, and a slight deviation may cause the bar to collide with their fingers, causing physical injuries. At the same time, when taller students are tested, their feet can often touch the ground, which creates an unfair situation for some students taking the test.

[0004] Secondly, when performing pull-ups accurately, the palms of the hands should be facing forward or backward to grip the bar, with the hands shoulder-width apart or slightly wider than the shoulders. The legs should be kept hanging naturally without bending or stretching. The body should be pulled upward using the strength of the upper limbs, waist, abdomen, and back. The lower jaw should be above the bar of the horizontal bar. After staying for 2 to 5 seconds, return to the hanging state. However, when students are taking physical fitness tests, it is difficult for most of them to perform the exercises in a standard manner. During the test, the students' muscles are likely to be damaged, and their grades are also likely to be affected. Therefore, a new type of horizontal bar with an adjustment mechanism for student physical fitness tests is urgently needed to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to provide a horizontal bar with an adjustment mechanism for physical fitness testing of students, so as to solve the problem raised in the above-mentioned background technology that due to the different heights of students, some shorter students have difficulty in doing the horizontal bar, and the horizontal bar may collide with their fingers and cause damage, while the feet of taller students can often touch the ground, which creates an unfair situation for some students taking the test, and is likely to cause damage to students' muscles during the test, which is also likely to affect students' grades.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a horizontal bar with an adjustment mechanism for physical fitness testing of students, comprising a base; a support frame, the support frame is installed around the top of the base; a connecting plate, the connecting plate is arranged on the side close to the support frame; a lever, the lever is arranged above the base; a switch, the switch is installed on the outside of one group of the support frames; an infrared transceiver assembly, the infrared transceiver assembly is installed on the side close to the connecting plate; and an adjustment assembly, the adjustment assembly is arranged between the support frame and the connecting plate, so that the height of the lever can be adjusted through the adjustment assembly to meet the needs of students of different heights.

[0007] Furthermore, the infrared transceiver assembly is composed of an infrared transmitter and an infrared receiver, the infrared transmitter is installed on one group of the connecting plates, and the infrared receiver is installed on another group of the connecting plates, and the positions of the infrared transceiver assembly are aligned with each other.

[0008] Furthermore, the adjusting component includes a screw rod, and the screw rods are provided with four groups, one end of each group of the screw rods is movably connected to the inside of the support frame through a bearing, and the other end of the screw rod passes through the support frame and is connected to the base bearing, the outer side of the screw rod is threadedly connected with a screw sleeve, and connecting blocks are installed between the screw sleeves, and the side of the connecting blocks close to each other is connected to the connecting plate, and transmission gears are provided all around the inside of the base, and the transmission gears are installed on the outside of the screw rod, and each two groups of the transmission gears are meshedly connected, and one of each two groups of the screw rods is transmission-connected through a pulley transmission assembly, and a motor is installed inside the base, and one end of one group of the screw rods is connected to the output shaft of the motor.

[0009] Furthermore, a slideway matching the screw sleeve is provided on one side of each two groups of the support frames where they are close to each other, and the slideway and the screw sleeve are slidably connected. The pulley transmission assembly is composed of a wheel and a belt. The wheels are respectively installed on the outside of two groups of the screw rods. The wheels are connected by belt transmission. The belt sleeve is arranged on the outside of the two groups of the wheels. The connecting plate and the lever are connected by an adjustment assembly.

[0010] Furthermore, the adjustment assembly includes a movable plate, and the movable plate is movably connected to the inside of the connecting plate, the side of the movable plate close to the lever is connected to the lever, both sides of the movable plate are meshed with a first gear, and the side of the first gear away from the movable plate is meshed with a second gear, the side of the second gear away from the first gear is meshed with a third gear, and the other side of the third gear is meshed with the rack plate, and the rack plate is mounted on the outer wall of the support frame.

[0011] Furthermore, the first gear, the second gear and the third gear are all movably connected to the inside of the connecting plate through bearings, the diameters of the second gear and the third gear are smaller than the diameter of the first gear, and grooves matching the third gear are provided on both sides of the connecting plate.

[0012] Furthermore, a sliding sleeve is installed on the side away from the movable plate, and a sliding rod is slidably connected inside the sliding sleeve, one end of the sliding rod is connected to the connecting block, and an auxiliary marking component is also arranged between the connecting plate and the lever.

[0013] Furthermore, the auxiliary marking assembly includes a ring, and the ring is movably connected to both sides of the outside of the lever, a support rod is arranged between the connecting plate and the ring, and both ends of the support rod are movably connected to the connecting plate and the ring through a rotating shaft.

[0014] Furthermore, sliders are installed on both sides of the inner part of the collar, and sliding grooves are provided on both sides of the outer part of the lever, and the sliding grooves and the sliders are slidably connected.

[0015] Furthermore, a rubber sleeve is glued to the outer side of the ring to increase the friction of the student's hand through the rubber sleeve.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. By providing an adjustment component, two sets of support frames and two sets of screw rods are provided on both sides of the top of the base, so that the support frame can stably support the lever and the screw rod, reducing the force applied to the screw rod during pull-ups. At the same time, through the action of the screw rod, the screw sleeve can be stably raised, and the wear between the screw rod and the screw sleeve is reduced, so that the screw sleeves on both sides are evenly stressed, greatly increasing the service life. Secondly, through the setting of the transmission gear and the pulley transmission component, the screw rods on both sides can be driven to rotate synchronously at the same time, so that the lever can be stably moved up and down, thereby greatly improving the ease of use and applicability. At the same time, the lever is driven to adjust by the up and down movement of the connecting block, so that students with different heights can smoothly participate in the test, avoiding injuries to students and unfair things.

[0018] 2. By providing an adjustment component, through the action of two sets of second gears and third gears for deceleration, and the action of the first gear for driving the moving plate to move, when the connecting plate is lowered, the moving plate can be driven to move under the action of the meshing connection between the third gear and the rack plate, so as to adjust the height between the infrared receiving and transmitting component and the lever to adapt to the height of the arms raised by students of different heights, so as to ensure that the feet of the students can be completely off the ground when doing pull-ups, and by fine-tuning the distance between the lever and the infrared receiving and transmitting component, the arm length of students of different heights can be adapted;

[0019] 3. By providing an auxiliary marking component and a supporting rod, the ring can be driven to push on the outside of the lever while fine-tuning between the lever and the infrared transmitting and receiving component, so as to adapt to the arm extension distance of students of different heights, and provide students with standard pull-ups prompts, thereby avoiding injuries to students during the test. In addition, the rubber sleeve on the outside of the ring is provided to increase friction and improve hand comfort. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention viewed from the left side;

[0022] Figure 2 It is a schematic diagram of the three-dimensional structure of the back of the present invention when viewed from above;

[0023] Figure 3 It is a schematic diagram of the side cross-sectional structure of the present invention;

[0024] Figure 4 It is a schematic diagram of a partial top view cross-sectional structure of the present invention;

[0025] Figure 5 It is a schematic diagram of the three-dimensional structure of the adjustment component of the present invention;

[0026] Figure 6 It is a three-dimensional structural schematic diagram of the adjustment component and the auxiliary marking component of the present invention;

[0027] Figure 7 For the present invention Figure 6 Schematic diagram of the three-dimensional structure of the part;

[0028] Figure 8It is a schematic diagram of a partial cross-section three-dimensional structure of the adjustment component of the present invention.

[0029] In the figure: 1. base; 2. support frame; 3. connecting plate; 4. lever; 5. switch; 6. infrared receiving and sending assembly; 7. adjustment assembly; 71. screw rod; 72. screw sleeve; 73. connecting block; 74. transmission gear; 75. pulley transmission assembly; 76. motor; 8. adjustment assembly; 81. moving plate; 82. first gear; 83. second gear; 84. third gear; 85. rack plate; 86. sliding sleeve; 87. sliding rod; 9. auxiliary marking assembly; 91. collar; 92. slider; 93. slide groove; 94. support rod. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0031] See also Figure 1-8 , an embodiment provided by the present invention: a horizontal bar with an adjustment mechanism for physical fitness test of students, comprising a base 1, a support frame 2, a connecting plate 3, a lever 4, a switch 5 and an infrared transceiver assembly 6, the support frame 2 is installed around the top of the base 1, and the side of the support frame 2 close to each other is connected to the connecting plate 3 through an adjustment assembly 7, and the side of the connecting plate 3 close to each other is connected to the lever 4 through an adjustment assembly 8, a switch 5 is installed on one side of the outer wall of one group of support frames 2, and the side of the connecting plate 3 close to each other is installed with an infrared transceiver assembly 6, and the infrared transceiver assembly 6 is composed of an infrared transmitter and an infrared receiver, the infrared transmitter is installed on one group of connecting plates 3, and the infrared receiver is installed on another group of connecting plates 3, and the positions of the infrared transceiver assemblies 6 are aligned with each other, and the motor 76 is controlled to be turned off through the setting of the infrared transceiver assembly 6 to complete the automatic adjustment operation;

[0032] The adjusting assembly 7 includes a screw rod 71, and four groups of screw rods 71 ​​are provided. One end of each group of screw rods 71 ​​is movably connected to the inside of the support frame 2 through a bearing, and the other end of the screw rod 71 passes through the support frame 2 and is connected to the bearing of the base 1. The outer side of the screw rod 71 is threadedly connected with a screw sleeve 72, and a connecting block 73 is installed between the screw sleeves 72. A slideway that cooperates with the screw sleeve 72 is provided on the side where each two groups of support frames 2 are close to each other, and the slideway and the screw sleeve 72 are slidably connected. The setting of the sliding connection between the slideway and the screw sleeve 72 facilitates the movement of the connecting block 73, and the lever 4 can be driven to move and adjust under the action of the screw sleeve 72. The side where the connecting block 73 is close to each other is connected to the connecting plate 3. Transmission gears 74 are provided all around the inside of the base 1, and the transmission gears 74 are installed on the outer side of the screw rod 71. There is a Meshing connection, one of the two groups of screw rods 71 ​​is connected through a pulley transmission assembly 75, the pulley transmission assembly 75 is composed of a wheel and a belt, the wheel discs are respectively installed on the outer sides of two groups of screw rods 71, the wheel discs are connected through a belt transmission, and the belt sleeve is arranged on the outer sides of the two groups of wheel discs. A motor 76 is installed inside the base 1, one end of one group of screw rods 71 ​​is connected to the output shaft of the motor 76, and the screw rods 71 ​​are driven to rotate synchronously through the rotation of the motor 76. The screw rods 71 ​​on both sides of the top of the support frame 2 are meshed and rotated through the meshing setting of the transmission gear 74, so that the screw sleeve 72 is driven to move through the effect of the threaded connection, and then the four groups of screw rods 71 ​​are driven and connected through the effect of the pulley transmission assembly 75, so that the four groups of screw rods 71 ​​are rotated synchronously, thereby driving the connecting plate 3 to move smoothly and stably;

[0033] The adjustment assembly 8 includes a moving plate 81, and the moving plate 81 is movably connected to the inside of the connecting plate 3, the side of the moving plate 81 close to the lever 4 is connected, both sides of the moving plate 81 are meshed with the first gear 82, and the side of the first gear 82 away from the moving plate 81 is meshed with the second gear 83, the side of the second gear 83 away from the first gear 82 is meshed with the third gear 84, and the other side of the third gear 84 is meshed with the rack plate 85, the rack plate 85 is installed on the outer wall of the support frame 2, the first gear 82, the second gear 83 and the third gear 84 are all movably connected to the inside of the connecting plate 3 through bearings, the diameters of the second gear 83 and the third gear 84 are smaller than the diameter of the first gear 82, and both sides of the connecting plate 3 are provided with a third gear 8 4, a sliding sleeve 86 is installed on the side of the moving plate 81 away from it, and a sliding rod 87 is slidably connected inside the sliding sleeve 86, and one end of the sliding rod 87 is connected to the connecting block 73. Under the action of the meshing connection between the third gear 84 and the rack plate 85, the first gear 82 drives the moving plate 81 to move, so as to adjust the height between the infrared receiving and transmitting component 6 and the lever 4 to adapt to the height of the arms raised by students of different heights, so as to ensure that the feet of the students can be completely off the ground when doing pull-ups, so as to ensure that each student can perform standard pull-ups, thereby improving ease of use and applicability, and by adjusting the position of the lever 4 by the moving plate 81, it can be equally adapted to the arm length of students of different heights;

[0034] The auxiliary marking component 9 includes a ring 91, and the ring 91 is movably connected to both sides of the outside of the lever 4, sliders 92 are installed on both sides of the inside of the ring 91, and grooves 93 are provided on both sides of the outside of the lever 4, and the grooves 93 and the sliders 92 are slidably connected. A support rod 94 is provided between the connecting plate 3 and the ring 91, and both ends of the support rod 94 are movably connected to the connecting plate 3 and the ring 91 through a rotating shaft. Through the setting of the support rod 94, it is convenient to adjust the position of the ring 91 while the lever 4 moves downward and upward, thereby improving convenience. A rubber sleeve is glued to the outside of the ring 91. Through the setting of the rubber sleeve, it is convenient for students to grab when doing pull-ups, thereby improving stability.

[0035] Working principle: When the student is doing the pull-up test, the student presses the switch 5 and stands on the upper surface of the base 1, and then the switch 5 drives the motor 76 to operate, which drives the screw 71 to rotate synchronously through the rotation of the motor 76, and the screws 71 on both sides of the top of the support frame 2 are meshed and rotated through the meshing setting of the transmission gear 74, thereby driving the screw sleeve 72 to move through the effect of the threaded connection, and then through the effect of the transmission connection of the pulley transmission assembly 75, the four groups of screws 71 rotate synchronously, thereby driving the connecting plate 3 to move smoothly and stably;

[0036] While moving downward, the third gear 84 and the rack plate 85 are meshed and connected, thereby driving the second gear 83 to rotate, so that the first gear 82 rotates. Since the diameters of the second gear 83 and the third gear 84 are smaller than the diameter of the first gear 82, the first gear 82 rotates smoothly here to drive the moving plate 81 to slowly descend. While the connecting plate 3 drives the lever 4 to descend, the moving plate 81 descends smoothly under the rotation of the first gear 82. At this time, the lever 4 moves downward. Under the action of the shaft connection, the ring 91 slides on the outside of the lever 4, so as to drive the ring 91 to move while the moving plate 81 is fine-tuned, and the spacing between the rings 91 is adjusted to adapt to the arm opening distance of students of different heights.

[0037] When the infrared ray receiving and transmitting assembly 6 descends to the student's head, the signal between the infrared ray receiving and transmitting assembly 6 is interrupted due to the obstruction of the head, thereby controlling the motor 76 to stop rotating. At this time, the infrared ray receiving and transmitting assembly 6 is no longer working, and the adjustment operation is completed;

[0038] When the next student does pull-ups, if he is the same height as the previous student, no adjustment is needed. When adjustments are needed, only the switch 5 needs to be pressed to reset the lever 4, and the operation ends here.

[0039] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A horizontal bar with an adjustment mechanism for student physical fitness testing, characterized in that: include: Base (1); A support frame (2), the support frame (2) being installed around the top of the base (1); A connecting plate (3), the connecting plate (3) being arranged on a side close to the supporting frame (2); A lever (4), wherein the lever (4) is arranged above the base (1); A switch (5), the switch (5) being installed on the outside of one group of the support frames (2); An infrared ray receiving and transmitting component (6), the infrared ray receiving and transmitting component (6) being installed on a side close to the connecting plate (3); an adjustment component (7), the adjustment component (7) being arranged between the support frame (2) and the connecting plate (3), so as to adjust the height of the lever (4) through the adjustment component (7) to meet the needs of students of different heights; The infrared transceiver assembly (6) is composed of an infrared transmitter and an infrared receiver. The infrared transmitter is mounted on one group of the connecting plates (3), and the infrared receiver is mounted on another group of the connecting plates (3). The positions of the infrared transceiver assembly (6) are aligned with each other. The adjustment assembly (7) includes a screw rod (71), and the screw rod (71) is provided in four groups. One end of each group of the screw rods (71) is movably connected to the inside of the support frame (2) through a bearing, and the other end of the screw rod (71) passes through the support frame (2) and is connected to the bearing of the base (1). The outer thread of the screw rod (71) A screw sleeve (72) is connected, and a connecting block (73) is installed between the screw sleeves (72), and the adjacent side of the connecting block (73) is connected to the connecting plate (3), and transmission gears (74) are arranged around the inside of the base (1), and the transmission gears (74) are installed on the outside of the screw rod (71), and each two groups of the transmission gears (74) are meshedly connected, and one group of each two groups of the screw rods (71) is connected to each other through a pulley transmission assembly (75), and a motor (76) is installed inside the base (1), and one end of one group of the screw rods (71) is connected to the output shaft of the motor (76); A slideway matched with the screw sleeve (72) is provided on one side of each two groups of the support frames (2) that are close to each other, and the slideway and the screw sleeve (72) are slidably connected. The pulley transmission assembly (75) is composed of a wheel disc and a belt. The wheel discs are respectively installed on the outside of two groups of the screw rods (71). The wheel discs are connected by a belt transmission. The belt sleeves are installed on the outside of the two groups of the wheel discs. The connecting plate (3) and the lever (4) are connected by an adjustment assembly (8). The adjustment assembly (8) comprises a movable plate (81), and the movable plate (81) is movably connected to the inside of the connecting plate (3), the side of the movable plate (81) close to the lever (4) is connected, both sides of the movable plate (81) are meshedly connected with a first gear (82), and the side of the first gear (82) away from the movable plate (81) is meshedly connected with a second gear (83), the side of the second gear (83) away from the first gear (82) is meshedly connected with a third gear (84), and the other side of the third gear (84) is meshed with a rack plate (85), and the rack plate (85) is mounted on the outer wall of the support frame (2); An auxiliary marking component (9) is also provided between the connecting plate (3) and the lever (4), the auxiliary marking component (9) comprising a collar (91), and the collar (91) is movably connected to two sides of the outside of the lever (4), a support rod (94) is provided between the connecting plate (3) and the collar (91), and two ends of the support rod (94) are movably connected to the connecting plate (3) and the collar (91) via a rotating shaft.

2. A horizontal bar with an adjustment mechanism for students' physical fitness test according to claim 1, characterized in that: The first gear (82), the second gear (83) and the third gear (84) are all movably connected to the interior of the connecting plate (3) via bearings; the diameters of the second gear (83) and the third gear (84) are smaller than the diameter of the first gear (82); and notches matching the third gear (84) are provided on both sides of the connecting plate (3).

3. A horizontal bar with an adjustment mechanism for students' physical fitness test according to claim 1, characterized in that: A sliding sleeve (86) is installed on the side of the movable plate (81) that is away from the movable plate, and a sliding rod (87) is slidably connected inside the sliding sleeve (86), and one end of the sliding rod (87) is connected to the connecting block (73).

4. A horizontal bar with an adjustment mechanism for students' physical fitness test according to claim 1, characterized in that: Slide blocks (92) are installed on both sides of the inner part of the collar (91), and slide grooves (93) are provided on both sides of the outer part of the lever (4), and the slide grooves (93) and the slide blocks (92) are slidably connected.

5. The horizontal bar with an adjustment mechanism for students' physical fitness test according to claim 1, characterized in that: A rubber sleeve is glued to the outer side of the sleeve ring (91) so as to increase the friction force of the student's hand through the rubber sleeve.

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