CN217333522U

CN217333522U - Parallelogram rule verification demonstration device for high school physics experiments

Info

Publication number: CN217333522U
Application number: CN202220282576.1U
Authority: CN
Inventors: 李永; 杨泽伟
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-02-11
Filing date: 2022-02-11
Publication date: 2022-08-30
Anticipated expiration: 2032-02-11

Abstract

The utility model belongs to the technical field of mechanics experimental devices, in particular to a parallelogram rule verification demonstration device for high school physics experiments, which comprises a bottom plate, a top plate, white paper, a fixed column and a rubber rope, two stay cords, two dynamometers, two mountings and fixed establishment, there are a plurality of support columns at the bottom plate edge between bottom plate and the roof, install the plane light source on the bottom plate, it has clear glass to inlay on the roof, fixed column fixed mounting is on the bottom plate, rubber rope one end is installed on the fixed column, the other end and two stay cord fixed connection, the free end and the dynamometer fixed connection of stay cord, the mounting includes sucking disc and supporting seat, dynamometer and supporting seat fixed connection, vertical slidable mounting has the lifter on the supporting seat, sucking disc fixed mounting is at the lifter lower extreme, and be located the supporting seat inboard, fixed establishment is used for fixing the plain paper on clear glass. The purpose is as follows: the problem of the operation degree of difficulty that current presentation device structural defect leads to is higher, experimental precision is lower is solved.

Description

Parallelogram rule verification demonstration device for high school physics experiments

Technical Field

The utility model belongs to the technical field of mechanics experimental apparatus, concretely relates to parallelogram rule of force is verified demonstration device for high school physics experiments.

Background

Mechanics is an important component in physics, and the parallelogram law of force is an important basis of mechanics knowledge, the experiment is to use two forces forming an angle with each other and another force to generate the same effect, whether the resultant force obtained by using the parallelogram rule is equal to the force within the allowable range of experimental error is considered, and if the resultant force is equal within the allowable range of experimental error, the resultant parallelogram rule of force is verified.

The existing experimental device comprises a square wood board, white paper, a drawing pin, a rubber strip, a dynamometer (2), a thin line, a ruler and a set square;

the experimental procedure was as follows:

1. fixing the white paper on the wood board through drawing pins;

2. fixing one end of the rubber strip on the wood board by a drawing pin;

3. tying two strings at the other end of the rubber strip, and pulling the rubber strip at an angle by using two dynamometers through the strings to extend the rubber strip;

4. recording the positions of the nodes on the white paper, then drawing the directions of the two strings, and recording the readings of the two dynamometers;

5. drawing two forces F1 and F2 on paper in proportion, and obtaining a resultant force F by using a parallelogram rule;

6. only one dynamometer is used, the knot point on the rubber strip is pulled to the same position O point through the thin rope, the reading of the dynamometer and the direction of the thin rope are recorded, the graph of the force F 'is drawn according to the same proportion, the force F' is compared with the resultant force F obtained by using the parallelogram rule, and whether the magnitude of the resultant force is equal and the direction is the same or not is compared;

7. the angle and the size of the F1 and the F2 are changed, and the process is carried out twice.

In the experimentation, require when pulling the dynamometer, need guarantee pulling many times to the dynamometer, should keep at same horizontal plane, still need guarantee in addition that the orientation of mark and line to node position will be accurate, the operation degree of difficulty is higher to lead to the experiment precision lower.

SUMMERY OF THE UTILITY MODEL

The utility model aims at: the demonstration device is used for solving the problems that the operation difficulty is higher and the test precision is lower due to the structural defects of the existing demonstration device.

In order to realize the technical purpose, the utility model discloses a technical scheme as follows:

a parallelogram rule verification demonstration device for high school physics experiments comprises a bottom plate, a top plate, white paper, a fixed column, a rubber rope, two pull ropes, two dynamometers, two fixing pieces and a fixing mechanism, a plurality of supporting columns are arranged between the bottom plate and the top plate at the edge of the bottom plate, a plane light source is arranged on the bottom plate, transparent glass is embedded on the top plate, the fixed column is fixedly arranged on the bottom plate, one end of the rubber rope is fixedly arranged on the fixed column, the other end of the rubber rope is fixedly connected with two pull ropes, the free end of the pull rope is fixedly connected with the dynamometer, the fixing piece comprises a sucker and a supporting seat, the dynamometer is fixedly connected with the supporting seat, a lifting rod is vertically and slidably arranged on the supporting seat, the sucking disc fixed mounting just is located the supporting seat inboard at the lifter lower extreme, fixed establishment is used for fixing the white paper on transparent glass.

Further prescribe that, the upper end fixed mounting of lifter has the dog, the lifter overlaps between dog and supporting seat and is equipped with compression spring. Due to the structural design, in the moving process of the fixing piece, namely when the rubber rope is pulled through the dynamometer, the supporting seat is contacted with the bottom plate, and at the moment, the compression spring drives the sucker to move upwards, so that the problem that the fixing piece is not smoothly moved due to the fact that the sucker is contacted with the bottom plate is solved; when needs fix the mounting on the bottom plate, press down the lifter for the sucking disc adsorbs on the bottom plate, accomplishes the fixed to the dynamometer, and at this moment, compression spring extrudees the supporting seat downwards, makes the lower terminal surface of supporting seat keep with the contact of bottom plate, avoids the supporting seat under the effect of the reverse tension of stay cord, and the skew problem that leads to, and the practicality is stronger.

Further inject, the rubber rope is kept away from fixed column one end and is fixed and be equipped with first pull ring, first convex lens is transversely installed at first pull ring middle part, first couple is installed to stay cord one end, the third pull ring is installed to the other end, the dynamometer includes the second couple, first couple is hung and is established on first pull ring, the second couple is hung and is established on the third pull ring, it has the second pull ring still to go back horizontal installation on the stay cord, transversely install the second convex lens on the second pull ring. Such structural design focuses on the light that sends on the plane light source through first convex lens and second convex lens for the light that the plane light source sent pierces through behind first convex lens and the second convex lens, and the focus is little facula on the white paper, and luminance is higher, and the recognition is easier, also reduces the error when marking simultaneously, and the practicality is stronger.

Further limiting, a rectangular through groove is formed in the top plate, and supporting edges for supporting the transparent glass are integrally formed at the edge of the rectangular through groove in the top plate. Such structural design, transparent glass is located the rectangle and leads to the inslot to support by supporting the arris, accomplish transparent glass and inlay the purpose on the roof, simple structure, simple to operate.

Further inject, fixed establishment includes four fixed blocks, the fixed iron plate that is equipped with on the fixed block, the corner rigidity of support arris is equipped with the arc piece, it places the blind hole to have seted up on the arc piece, it has magnet to inlay in the blind hole to place, transparent glass's up end is less than the up end of roof on the level. Such structural design when fixing white paper through fixed establishment, can place white paper on transparent glass earlier, places the fixed block again, utilizes the iron plate on the fixed block and the mutual absorption of the magnet on the arc piece, accomplishes the fixed to white paper, convenient to use.

Further limiting, and a convex column is fixedly arranged on the fixing block. Such structural design, accessible projection take the fixed block, and it is more convenient to operate.

Adopt above-mentioned technical scheme's utility model, have following advantage:

1. the dynamometer is supported by the fixing piece, so that the dynamometer is pulled for multiple times and is kept on the same horizontal plane, and the operation difficulty is reduced;

2. the dynamometer is fixed by the sucker, so that the dynamometer does not need to be continuously pulled manually when the white paper is marked with points and drawn mutually, and the use is more convenient;

3. the nodes are projected on the white paper on the transparent glass through the plane light source, so that the marking of the positions of the nodes and the direction of the line are more accurate, and the precision of the experiment is improved;

4. in the moving process of the fixing piece, namely when the rubber rope is pulled through the dynamometer, the supporting seat is contacted with the bottom plate, at the moment, the compression spring drives the sucker to move upwards, and the problem that the fixing piece cannot move smoothly due to the fact that the sucker is contacted with the bottom plate is avoided; when the fixing piece needs to be fixed on the bottom plate, the lifting rod is pressed downwards, so that the sucker is adsorbed on the bottom plate, the dynamometer is fixed, at the moment, the compression spring extrudes the supporting seat downwards, the lower end face of the supporting seat keeps contact with the bottom plate, the problem of deflection caused by the fact that the supporting seat is under the action of reverse tension of the stay cord is avoided, and the practicability is high;

5. light that sends on the plane light source is focused through first convex lens and second convex lens for after the light that the plane light source sent pierces through first convex lens and second convex lens, the focus is little facula on the plain paper, and luminance is higher, and the recognition is easier, also reduces the error when marking simultaneously, and the practicality is stronger.

Drawings

The present invention can be further illustrated by the non-limiting examples given in the accompanying drawings;

fig. 1 is a schematic structural diagram of an embodiment of the parallelogram rule verification demonstration device for high school physics experiments of the present invention;

fig. 2 is a schematic diagram of an explosion structure of an embodiment of the parallelogram rule verification demonstration device for high school physics experiments of the present invention;

FIG. 3 is an enlarged schematic view of the structure at A in FIG. 2;

fig. 4 is a schematic cross-sectional structural view of an embodiment of the parallelogram rule verification demonstration apparatus for high school physics experiments of the present invention;

FIG. 5 is an enlarged view of the structure at B in FIG. 4;

fig. 6 is a first schematic structural diagram of the parallelogram rule verification demonstration apparatus for high school physics experiments according to the present invention, in which the top plate is removed;

fig. 7 is a schematic structural diagram ii of the parallelogram rule verification demonstration apparatus for high school physics experiments according to the present invention after the top plate is removed;

the main component symbols are as follows:

a bottom plate 1, a support column 10, a plane light source 11,

A top plate 2, white paper 20, transparent glass 21,

A rectangular through groove 22, a supporting edge 23, an arc block 24, a magnet 240, a fixed block 25, a convex column 250,

A fixed column 3, a rubber rope 31, a pull rope 32,

Dynamometer 4, a first hook 41, a second hook 42,

A fixing piece 5, a suction cup 51, a support seat 52, a lifting rod 53, a stopper 54, a compression spring 55,

A first pull ring 61, a first convex lens 610, a second pull ring 62, a second convex lens 620 and a third pull ring 63.

Detailed Description

The present invention will be described in detail with reference to the drawings and specific embodiments, wherein like reference numerals are used for similar or identical parts in the drawings or the description, and implementations not shown or described in the drawings are known to those of ordinary skill in the art. In addition, directional terms such as "upper", "lower", "top", "bottom", "left", "right", "front", "back", etc. mentioned in the embodiments are only directions referring to the drawings, and are not intended to limit the scope of the present invention.

As shown in fig. 1 to 7, the utility model discloses a parallelogram rule verification demonstration device for high school physics experiments, which comprises a bottom plate 1, a top plate 2, white paper 20, a fixed column 3, a rubber rope 31, two pull ropes 32, two dynamometers 4, two fixing parts 5 and a fixing mechanism, a plurality of support columns 10 are installed at the edge of the bottom plate 1 between the bottom plate 1 and the top plate 2, a plane light source 11 is installed on the bottom plate 1, the plane light source 11 is specific and can adopt an LED lamp panel, a transparent glass 21 is embedded on the top plate 2, the fixed column 3 is fixedly installed on the bottom plate 1, one end of the rubber rope 31 is fixedly installed on the fixed column 3, the other end is fixedly connected with the two pull ropes 32, the free end of the pull rope 32 is fixedly connected with the dynamometer 4, the fixing part 5 comprises a suction cup 51 and a supporting seat 52, the dynamometer 4 is fixedly connected with the supporting seat 52, a lifting rod 53 is vertically slidably installed on the supporting seat 52, the suction cup 51 is fixedly installed at the lower end of the lifting rod 53 and is positioned inside the supporting seat 52, and the fixing mechanism is used for fixing the white paper 20 on the transparent glass 21.

A stopper 54 is fixedly mounted on the upper end of the lifting rod 53, and a compression spring 55 is sleeved on the lifting rod 53 between the stopper 54 and the support seat 52. In the moving process of the fixing piece 5, namely when the dynamometer 4 pulls the rubber rope 31, the supporting seat 52 is in contact with the bottom plate 1, at the moment, the compression spring 55 drives the suction cup 51 to move upwards, so that the problem that the fixing piece 5 cannot move smoothly due to the fact that the suction cup 51 is in contact with the bottom plate 1 is solved; when needs fix mounting 5 on bottom plate 1, press down lifter 53 for sucking disc 51 adsorbs on bottom plate 1, accomplishes the fixed to dynamometer 4, and at this moment, compression spring 55 extrudes supporting seat 52 downwards, makes the lower terminal surface of supporting seat 52 keep with bottom plate 1's contact, avoids supporting seat 52 under the effect of the reverse tension of stay cord 32, and the skew problem that leads to, and the practicality is stronger.

Rubber rope 31 is kept away from fixed first pull ring 61 that is equipped with of fixed column 3 one end, first convex lens 610 is transversely installed in first pull ring 61 middle part, first couple 41 is installed to stay cord 32 one end, the third pull ring 63 is installed to the other end, dynamometer 4 includes second couple 42, first couple 41 is hung and is established on first pull ring 61, second couple 42 is hung and is established on third pull ring 63, it has second pull ring 62 to go back horizontal installation on stay cord 32, transversely install second convex lens 620 on the second pull ring 62. Light emitted from the plane light source 11 is focused through the first convex lens 610 and the second convex lens 620, so that after the light emitted from the plane light source 11 penetrates through the first convex lens 610 and the second convex lens 620, the light is focused on the white paper 20 to form a small light spot, the brightness is higher, the light can be recognized more easily, errors in marking can be reduced, and the practicability is high.

The top plate 2 is provided with a rectangular through groove 22, and a supporting edge 23 for supporting the transparent glass 21 is integrally formed at the edge of the rectangular through groove 22 of the top plate 2. The transparent glass 21 is positioned in the rectangular through groove 22 and supported by the supporting ribs 23, so that the purpose that the transparent glass 21 is embedded on the top plate 2 is achieved, and the transparent glass light-emitting device is simple in structure and convenient to install.

The fixing mechanism comprises four fixing blocks 25, iron blocks are fixedly arranged on the fixing blocks 25, arc-shaped blocks 24 are fixedly arranged at the corners of the supporting edges 23, blind holes for placement are formed in the arc-shaped blocks 24, magnets 240 are embedded in the blind holes for placement, and the upper end face of the transparent glass 21 is lower than the upper end face of the top plate 2 in the horizontal height. When fixing white paper 20 through fixed establishment, can place white paper 20 on clear glass 21 earlier, place fixed block 25 again, utilize the iron plate on the fixed block 25 and the mutual absorption of magnet 240 on the arc piece 24, accomplish the fixed of white paper 20, convenient to use.

The fixing block 25 is fixedly provided with a convex column 250. The fixing block 25 can be taken by the convex column 250, so that the operation is more convenient.

In this example, the experimental procedure was as follows:

1. taking down the fixing mechanism, placing the white paper 20 on the transparent glass 21, and fixing the white paper 20 by using the fixing mechanism;

2. fixing one end of a rubber rope 31 on the fixing column 3, and opening the plane light source 11;

3. the first hooks 41 on the two pull ropes 32 are hung on the first pull ring 61, the second hooks 42 on the two dynamometers 4 are hung on the two third pull rings 63 respectively, and under the condition that the lower end face of the support seat 52 is contacted with the bottom plate 1, the rubber rope 31 is pulled by utilizing the two dynamometers 4 which form an angle with each other, so that the rubber rope 31 is extended, and in the process, the first convex lens 610 and the second convex lens 620 are in a horizontal state;

4. pressing the lifting rod 53 to make the sucker 51 be adsorbed on the bottom plate 1;

5. the plane light source 11 forms three light spots on the white paper through a first convex lens 610 and two second convex lenses 620, and records the positions of the light spots on the white paper, wherein the light spot formed on the white paper by the first convex lens 610 is marked as an O point, then a line is connected between the light spots formed by the first convex lens 610 and the two second convex lenses 620, and the readings of the two dynamometer 4 are carried out;

6. drawing two forces F1 and F2 on the white paper 20 in proportion, and obtaining a resultant force F by using a parallelogram rule;

7. only one dynamometer 4 is used, a light spot formed by the first convex lens 610 on the rubber rope 31 is pulled to the same position O point through the dynamometer 4, the lifting rod 53 is pressed, the dynamometer 4 is fixed, the reading of the dynamometer 4 and the direction of the pull rope 32 are recorded, the drawing of the force F 'is made according to the same proportion, the force F' is compared with the resultant force F obtained by the parallelogram rule, and whether the magnitude of the resultant force is equal and the direction is the same is compared;

It is right above the utility model provides a pair of parallelogram rule of high school physics experiment power verifies presentation device and has introduced in detail. The description of the specific embodiments is only intended to facilitate an understanding of the method of the invention and its core ideas. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.

Claims

1. The utility model provides a parallelogram rule of high school physics experiment power verifies presentation device which characterized in that: the device comprises a bottom plate (1), a top plate (2), white paper (20), a fixing column (3), a rubber rope (31), two pull ropes (32), two dynamometers (4), two fixing pieces (5) and a fixing mechanism, wherein a plurality of support columns (10) are arranged at the edge of the bottom plate (1) between the bottom plate (1) and the top plate (2), a plane light source (11) is arranged on the bottom plate (1), transparent glass (21) is embedded on the top plate (2), the fixing column (3) is fixedly arranged on the bottom plate (1), one end of the rubber rope (31) is fixedly arranged on the fixing column (3), the other end of the rubber rope (31) is fixedly connected with the two pull ropes (32), the free end of each pull rope (32) is fixedly connected with the corresponding dynamometer (4), each fixing piece (5) comprises a suction disc (51) and a supporting seat (52), and each dynamometer (4) is fixedly connected with the corresponding supporting seat (52), the paper cutting machine is characterized in that a lifting rod (53) is vertically and slidably mounted on the supporting seat (52), the sucker (51) is fixedly mounted at the lower end of the lifting rod (53) and located on the inner side of the supporting seat (52), and the fixing mechanism is used for fixing the white paper (20) on the transparent glass (21).

2. The parallelogram rule verification demonstration device for high school physics experiments according to claim 1, characterized in that: a stop block (54) is fixedly mounted at the upper end of the lifting rod (53), and a compression spring (55) is sleeved between the stop block (54) and the supporting seat (52) of the lifting rod (53).

3. The parallelogram rule verification demonstration device for high school physics experiments according to claim 1, characterized in that: rubber rope (31) is kept away from fixed column (3) one end and is fixed and be equipped with first pull ring (61), first convex lens (610) are transversely installed at first pull ring (61) middle part, first couple (41), third pull ring (63) are installed to the other end are installed to stay cord (32) one end, dynamometer (4) are including second couple (42), first couple (41) are hung and are established on first pull ring (61), second couple (42) are hung and are established on third pull ring (63), it has second pull ring (62) to go back horizontal installation on stay cord (32), transversely install second convex lens (620) on second pull ring (62).

4. The parallelogram rule verification demonstration device for high school physics experiments according to claim 1, characterized in that: a rectangular through groove (22) is formed in the top plate (2), and a supporting edge (23) used for supporting the transparent glass (21) is integrally formed at the edge of the rectangular through groove (22) of the top plate (2).

5. The parallelogram rule verification demonstration device for high school physics experiments according to claim 4, characterized in that: fixed establishment includes four fixed blocks (25), the fixed iron plate that is equipped with on fixed block (25), the corner rigidity that supports arris (23) is equipped with arc piece (24), seted up on arc piece (24) and placed the blind hole, it has magnet (240) to place to inlay in the blind hole, the up end of transparent glass (21) is less than the up end of roof (2) on the level.

6. The parallelogram rule verification demonstration device for high school physics experiments according to claim 5, characterized in that: the fixed block (25) is fixedly provided with a convex column (250).