CN215577248U

CN215577248U - Free fall presentation device for high school physics

Info

Publication number: CN215577248U
Application number: CN202122056755.1U
Authority: CN
Inventors: 玉英; 冯广东
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-08-29
Filing date: 2021-08-29
Publication date: 2022-01-18
Anticipated expiration: 2031-08-29

Abstract

The utility model discloses a free falling body demonstration device for high school physics, and relates to the technical field of high school physics experimental equipment. The movable clamping device comprises a vertically placed frame body, wherein a mounting frame is mounted at the top of the frame body, fixed clamping plates are symmetrically and fixedly arranged on one side of the mounting frame, two parallel sliding rods are horizontally and slidably mounted on the mounting frame, a linkage piece is mounted on the mounting frame, the two sliding rods are driven to move in opposite directions through the linkage piece, movable clamping plates are horizontally and movably mounted on the two sliding rods, and adjusting components for adjusting the movement of the movable clamping plates are mounted on the sliding rods. Compared with the prior art, the device ensures that the two demonstration objects are positioned on the same plane through the limiting plate, and then the two objects to be tested with different sizes can be clamped and synchronously put down through the cooperation of the linkage assembly and the adjusting assembly, so that the precision is higher.

Description

Free fall presentation device for high school physics

Technical Field

The utility model relates to the technical field of high school physics experimental equipment, in particular to a free fall demonstration device for high school physics.

Background

The free-fall motion is a course of physics and mathematics in high school, and the free-fall motion refers to the motion of a conventional object with zero initial speed only under the action of gravity and is called free-fall motion. Free fall motion is a physical model in an ideal situation. The acceleration is that any object generates an inertia track under the action of gravity, at least initially, only the gravity is the only force condition, and the acceleration is uniform with the initial speed of 0. For convenience of teaching, a free-fall demonstration device is usually used for demonstration, but the initial heights of two objects are not easy to keep consistent when the two objects with different masses or different sizes are subjected to free-fall comparison in the conventional high school physics free-fall demonstration, so that the experimental result is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims to: in order to solve the problems in the background, the utility model provides a free fall demonstration device for high school physics.

The utility model specifically adopts the following technical scheme for realizing the purpose:

a free fall demonstration device for high school physics comprises a vertically placed frame body, wherein the top of the frame body is provided with an installation frame, one side of the mounting rack is symmetrically and fixedly provided with fixed clamping plates, the mounting rack is horizontally and slidably provided with two parallel slide bars, the mounting rack is provided with a linkage piece, the two slide bars are driven by the linkage piece to move in opposite directions, the two slide bars are horizontally and movably provided with movable clamping plates, the slide bars are provided with adjusting components for adjusting the movable clamping plates to move, so that one side of the movable clamping plate and one side of the fixed clamping plate far away from the other fixed clamping plate clamp the demonstration object, the movable clamping plate is movably inserted into the mounting frame, the limiting plate is attached to the bottoms of the movable clamping plate and the fixed clamping plate, and the frame body is provided with a placing groove used for receiving a fallen demonstration object.

Furthermore, the linkage piece comprises a gear which is rotatably arranged between the two slide bars through a rotating shaft, and racks which are meshed with the gear are arranged on the opposite sides of the two slide bars.

Further, one end of the rotating shaft is located outside the mounting frame and is provided with a knob.

Further, the two sides of the back of the slide bar are respectively and fixedly provided with a straight bar, one end of each straight bar is fixedly provided with a T-shaped block, and a T-shaped groove matched with the T-shaped blocks is formed in the mounting rack.

Furthermore, the adjusting part is including installing connecting plate on the slide bar, the last rotation of connecting plate installs the threaded rod, movable clamp plate thread bush is established on the threaded rod.

Furthermore, the sliding grooves are formed in the two sides of the sliding rod, which are opposite to each other, along the length direction of the sliding rod, and the movable clamping plate is symmetrically and fixedly provided with limiting blocks matched with the sliding grooves.

Further, a graduated scale is vertically arranged on the frame body.

Further, a cushion pad is arranged at the bottom of the placing groove.

The utility model has the following beneficial effects:

1. compared with the prior art, the device ensures that the two demonstration objects are positioned on the same plane through the limiting plate, preferably, the object to be tested can be a sphere, the accuracy is higher, then the two objects to be tested with different sizes can be clamped and synchronously put down through the cooperation of the linkage assembly and the adjusting assembly, and the accuracy is higher.

Drawings

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is a schematic perspective view of the present invention;

FIG. 3 is a front view of the present invention;

FIG. 4 is a sectional view taken along line A-A of FIG. 3 in accordance with the present invention;

reference numerals: 1. a frame body; 2. a mounting frame; 3. fixing the clamping plate; 4. a slide bar; 5. a linkage member; 501. a gear; 502. a rack; 6. a movable splint; 7. an adjustment assembly; 701. a connecting plate; 702. a threaded rod; 8. a chute; 9. a limiting block; 10. a limiting plate; 11. a graduated scale; 12. a placement groove; 13. a cushion pad; 14. a straight rod.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

In the description of the embodiments of the present invention, it should be noted that the terms "inside", "outside", "upper", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships conventionally arranged when the products of the present invention are used, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements indicated must have specific orientations, be constructed in specific orientations, and operated, and thus, should not be construed as limiting the present invention.

As shown in fig. 1, 2 and 3, a free fall demonstration apparatus for high school physics comprises a vertically placed frame body 1, a mounting frame 2 is installed on the top of the frame body 1, fixed splints 3 are symmetrically and fixedly arranged on one side of the mounting frame 2, two parallel slide bars 4 are horizontally and slidably installed on the mounting frame 2, a linkage member 5 is installed on the mounting frame 2, the two slide bars 4 are driven to move in opposite directions by the linkage member 5, movable splints 6 are horizontally and movably installed on the two slide bars 4, an adjusting component 7 for adjusting the movement of the movable splints 6 is installed on the slide bars 4, so that one side of the movable splints 6 and one side of the fixed splints 3 far away from the other fixed splint 3 clamp a demonstration object, a limiting plate 10 attached to the bottoms of the movable splints 6 and the fixed splints 3 is movably inserted on the mounting frame 2, a placing groove 12 is formed on the frame body 1 and used for receiving the demonstration object after being taken off, in use, firstly, a demonstration object is placed on the top of the limiting plate 10, so that two demonstration objects are on the same plane, then the linkage 5 is adjusted to move the two sliding rods 4, because the moving directions of the two sliding rods 4 are opposite, the two sliding rods 4 can make the two movable clamping plates 6 approach to each other or separate from each other when moving, the movable clamping plates 6 can make one of the larger demonstration objects clamped because the two demonstration objects are different in size, at the time, the demonstration object which is not clamped can adjust the adjusting component 7 on the corresponding sliding rod 4, so that the corresponding movable clamping plate 6 moves, so that the other smaller demonstration object is clamped, at the time, the limiting plate 10 can be drawn out, then the linkage 5 is adjusted to make the two sliding rods 4 move in opposite directions (separate from each other), so that the two movable clamping plates 6 separate from each other, thereby loosen the demonstration thing simultaneously, and then make two demonstration things descend in step, realized two demonstration things descend in step under same height, compare with current, the device ensures that two demonstration things are in the coplanar through limiting plate 10, and is preferred, and the determinand can be the spheroid, and the accuracy is higher, then can put down the determinand centre gripping of two equidimensions not and in step through the cooperation of interlock subassembly and adjusting part 7, and the accuracy is higher.

As shown in fig. 1, 2 and 3, in some embodiments, the linkage 5 includes a gear 501 rotatably mounted between the two sliding bars 4 through a rotating shaft, racks 502 engaged with the gear 501 are mounted on opposite sides of the two sliding bars 4, and the gear 501 is rotated to make the two sliding bars 4 approach or move away from each other, so as to make the two movable jaws 6 approach or move away from each other.

As shown in fig. 2 and 4, in some embodiments, one end of the shaft is located outside the mounting frame 2 and is mounted with a knob, which is designed to facilitate rotation of the gear 501.

As shown in fig. 1 and 4, in some embodiments, the two opposite sides of the sliding rod 4 are both fixedly provided with a straight rod 14, one end of the straight rod 14 is fixedly provided with a T-shaped block, the mounting frame 2 is provided with a T-shaped groove adapted to the T-shaped block, and the T-shaped block and the T-shaped groove serve the purpose of guiding and limiting.

As shown in fig. 1, 2 and 4, in some embodiments, the adjusting assembly 7 includes a connecting plate 701 mounted on the sliding rod 4, a threaded rod 702 is rotatably mounted on the connecting plate 701, the movable clamp 6 is threadedly sleeved on the threaded rod 702, one hand rotates the knob to move the two sliding rods 4, so that the two movable clamps 6 approach each other, at this time, a larger demonstration object can be clamped, the unclamped demonstration object can rotate the corresponding threaded rod 702 with the other hand to move the movable clamp 6, so that a smaller demonstration object can be clamped, at this time, because the positions of the two movable clamps 6 are adjusted, the two demonstration objects with different sizes can be clamped by rotating the knob (as shown in fig. 1 and 4), and then the limiting plate 10 is removed to perform a free-fall demonstration.

As shown in fig. 2 and 4, in some embodiments, sliding grooves 8 are formed in two opposite sides of the sliding rod 4 along the length direction of the sliding rod, limiting blocks 9 matched with the sliding grooves 8 are symmetrically and fixedly arranged on the movable clamping plate 6, and the sliding grooves 8 and the limiting grooves are designed to achieve guiding and limiting functions, so that the movable clamping plate 6 is more smooth when moving.

As shown in fig. 1, in some embodiments, a graduated scale 11 is vertically installed on the frame body 1, and the design of the graduated scale 11, in cooperation with a high-speed camera, can visually check the acceleration process of the demonstration object during the free falling.

As shown in fig. 3 and 4, in some embodiments, a cushioning pad 13 is provided at the bottom of the standing groove 12, and the cushioning pad 13 is designed to reduce a cushioning force after the demo falls, prevent the demo from being ejected from the standing groove 12, and serve the purpose of protecting the mounting frame 2.

Claims

1. The utility model provides a high school physics is with presentation device that freely falls, its characterized in that, includes vertical support body (1) of placing, mounting bracket (2) are installed at support body (1) top, mounting bracket (2) one side symmetry has set firmly solid fixed splint (3), horizontal slidable mounting has two slide bars (4) that are parallel to each other on mounting bracket (2), install interlock (5) on mounting bracket (2), through two slide bars (4) of interlock (5) drive move with opposite direction, two slide bars (4) are improved level movable mounting has movable clamp plate (6), install on slide bar (4) and be used for adjusting regulating part (7) that movable clamp plate (6) removed to make movable clamp plate (6) one side with solid fixed splint (3) keep away from another one side of solid fixed splint (3) will demonstrate the object centre gripping, the demonstration device is characterized in that a limiting plate (10) which is attached to the bottoms of the movable clamping plate (6) and the fixed clamping plate (3) is movably inserted into the mounting frame (2), a placing groove (12) is formed in the frame body (1), and the placing groove is used for receiving a fallen demonstration object.

2. The high school physics free fall demonstration device according to claim 1 wherein said linkage (5) comprises a gear (501) rotatably mounted between two said slide bars (4) through a rotating shaft, and a rack (502) engaged with said gear (501) is mounted on opposite sides of two said slide bars (4).

3. A high school physics free fall demonstration device according to claim 2 wherein one end of the rotation shaft is located outside the mounting frame (2) and a knob is mounted.

4. The high school physics free fall demonstration device according to claim 1 wherein the opposite sides of the sliding rod (4) are fixedly provided with straight rods (14), one end of each straight rod (14) is fixedly provided with a T-shaped block, and the mounting frame (2) is provided with a T-shaped groove matched with the T-shaped block.

5. The high school physics free fall demonstration device according to claim 1 wherein said adjusting component (7) comprises a connecting plate (701) mounted on said sliding rod (4), said connecting plate (701) is rotatably mounted with a threaded rod (702), said movable clamp plate (6) is threaded on said threaded rod (702).

6. The high school physics free fall demonstration device according to claim 1 wherein the opposing sides of the sliding bar (4) are provided with sliding grooves (8) along the length direction thereof, and the movable clamp plate (6) is symmetrically and fixedly provided with limiting blocks (9) adapted to the sliding grooves (8).

7. A high school physics free fall demonstration device according to claim 1 wherein the frame (1) has a scale (11) mounted vertically thereon.

8. A high school physics free-fall demonstration apparatus according to claim 1 wherein said standing groove (12) is provided with a cushion (13) at the bottom.