CN206921350U

CN206921350U - The parallelogram rule confirmatory experiment exhibiting device of power

Info

Publication number: CN206921350U
Application number: CN201720590058.5U
Authority: CN
Inventors: 郭腾璐
Original assignee: Individual
Current assignee: Individual
Priority date: 2017-05-24
Filing date: 2017-05-24
Publication date: 2018-01-23
Anticipated expiration: 2027-05-24

Abstract

The utility model discloses the parallelogram rule confirmatory experiment exhibiting device of power, physics facility field is related generally to.Including Graphic Panel, the Graphic Panel includes the rectangular portion on top and the half-round of bottom, mark has the corresponding O points in the center of circle of half-round on the Graphic Panel, the week side of boss of the Graphic Panel is provided with slideway, control box is slidably connected in the slideway, the top of the rectangular portion it is placed in the middle be provided with stretch cord, the upper end of the stretch cord is fixedly connected with rectangular portion, the lower end of the stretch cord is provided with annulus, the annulus is provided with can be along the first dynamometer and the second dynamometer of its circle swing, drawstring is connected on first dynamometer and the second dynamometer, the drawstring is in control box and can pass through control box folding and unfolding.The beneficial effects of the utility model are：It facilitates and simplifies the operation of the parallelogram rule confirmatory experiment of power, and has good bandwagon effect.

Description

The parallelogram rule confirmatory experiment exhibiting device of power

Technical field

It the utility model is related to the parallelogram rule confirmatory experiment displaying dress in physics facility field, specifically power Put.

Background technology

In Physics Classroom Teaching, even if experiment link helps the key component of students knowledge, and the weight of examination Want link.Wherein, in the Classic Experiments on mechanics, the parallelogram rule confirmatory experiment of power is that force resolution is learnt Indispensable experiment.

In this experiment, there is very big difficulty in displaying and explanation of the teacher to experiment, cause student to be difficult to observation clear Chu, influence to learn.It is more trifling mainly due to existing experiment apparatus to trace it to its cause, and experimental procedure is very troublesome, labor It is as follows：

In order to complete the parallelogram rule confirmatory experiment of power, it is necessary to prepare to include plank, blank sheet of paper, drawing pin, rubber band, thin The teaching aids such as rope, spring scale, graduated scale, not only the miscellaneous quantity of species is more for these teaching aids, and also certain danger (such as scheme Nail), made troubles to being put to good use on the careful preparation and class of teacher.Simultaneously in concrete operations, teacher to be not only laid out one by one and Above-mentioned equipment is operated, and in experiment link, not only pulls two springs to make the more difficult control of operation of rubber band lower end arrival O points, And after reaching O points, it is also necessary to which teacher marks out the direction of two springs while two springs are fixed, and these operations rely on Both hands are difficult to smoothly complete, and very big trouble is brought to teacher, often interrupt and repeat, and not only extend the time of operation, and And hand motion blocks experimentation again and again during teacher's operation, influences observation of students.Make to demonstrate on classroom this experiment effect, Efficiency is all poor.

Utility model content

The purpose of this utility model is the parallelogram rule confirmatory experiment exhibiting device for providing power, its convenient and letter The operation of the parallelogram rule confirmatory experiment of power is changed, and there is good bandwagon effect.

The utility model to achieve the above object, is achieved through the following technical solutions：

The parallelogram rule confirmatory experiment exhibiting device of power, including Graphic Panel, the Graphic Panel include the square on top Shape portion and the half-round of bottom, mark has the corresponding O points in the center of circle of half-round, the week of the Graphic Panel on the Graphic Panel Side is provided with slideway, slidably connects control box in the slideway, the top of the rectangular portion it is placed in the middle be provided with stretch cord, the bullet The upper end of power rope is fixedly connected with rectangular portion, and the lower end of the stretch cord is provided with annulus, and the annulus is provided with can be along its circle The first dynamometer and the second dynamometer that week swings, drawstring are connected on first dynamometer and the second dynamometer, institute Drawstring is stated in control box and can be by control box folding and unfolding.

A points and B points are also marked with the Graphic Panel, the A points are fixed on the upper extreme point in rectangular portion, institute for stretch cord It is lower extreme point of the stretch cord under natural length to state B points, the A points, B points and O points be arranged at from top to bottom one it is vertical straight On line.

The control box is provided with upper plenum and lower cavity from top to bottom, vertical in the control box to be provided with and its company of rotation The axis connect, the axis run through upper plenum and lower cavity, and the top of the axis exposed to outside and is provided with knob, the rotation Button bottom surface is provided with the sleeve pipe for being secured to connection, and described sleeve pipe runs through the top of upper plenum, and the bottom side of described sleeve pipe is fixed The lower tooth disk of annular is connected with, the top of the upper plenum is provided with the upper fluted disc of annular, and the upper fluted disc is arranged at lower tooth disk Top, the bottom surface of the upper fluted disc and the top surface of lower tooth disk are provided with the tooth being meshed, and the first spring is additionally provided with the upper plenum, For first spring housing on axis, the inner side surface of the control box is provided with the lacing hole being connected with lower cavity, described Drawstring enters lower cavity through lacing hole, and the drawstring, on axis, the bottom surface of the lower cavity is provided with and axis Adaptable slot.

The bottom surface of the control box is provided with cavity, is provided with second spring and the decorative pearl on top of an official cap in the cavity, the decorative pearl on top of an official cap it is interior End is connected with second spring, and the outer end of the decorative pearl on top of an official cap is exposed to outside the bottom surface of control box from the stretching of cavity, the bottom of the slideway Face is provided with the spherical neck with decorative pearl on top of an official cap activity clamping, and the neck is distributed along slideway.

The annulus swings the peg being connected with it provided with two, and one end of the peg is enclosed on annulus and and annulus Connected along its circumferential slippage, the one end of the peg away from annulus is connected with the first dynamometer or the second dynamometer.

The top of the Graphic Panel is provided with horizontal storage trough.

The surface of the Graphic Panel is provided with blank.

The slideway includes the linear ramp for being arranged at rectangular portion both sides, and is arranged at the camber line slideway of half-round side, The bottom of the linear ramp is corresponding with the top of homonymy camber line slideway respectively and connects, the neck edge being arranged in camber line slideway The week side of boss annular array of half-round, it is corresponding with the horizontal level where B points to be arranged at the neck in linear ramp.

Prior art is contrasted, the beneficial effects of the utility model are：

1st, the application method of the present apparatus is：Graphic Panel is fixed on dais or blackboard, promote two control box make its from Slideway slides down to the downside of half-round and is fixed on two appropriate locations, operational control box retracting drawstring, respectively to connecting Connect the first dynamometer and the second dynamometer produces pulling force, and then the annulus of stretch cord bottom is located at O points, you can mark.

Apparatus required for experiment link is integrated together by the present apparatus, and teacher does not have to individually prepare again, avoids trouble, And without the equipment of the dangerous factors such as drawing pin, facilitate using and managing for apparatus.Meanwhile whole operation only needs operation periphery Control box, experimentation will not be blocked, facilitate observation of students, improve bandwagon effect.And by fixed control box come The angle of the first dynamometer and the second dynamometer is determined, and pulling force size is controlled by furling drawstring instead of the pulling of hand, is controlled System is more convenient and accurate.

2nd, by the A points, B points and O points that set, and make A, B relative with the top bottom position of stretch cord nature Should, so as to save the time on class, the preamble preparation process of no technology content is simplified, teacher is absorbed in these The explanation of point.

3rd, the operating method of the control box retracting drawstring is：Pressure knob is pressed downwards, separates fluted disc and lower tooth disk, rotation Button can be rotated so as to furl or decontrol drawstring, to suitable dynamics after unclamp knob, upper fluted disc and lower tooth disk occlusion, you can lock Only, drawstring is fixed, pulling force and fixed pulling force is controlled without relying upon the hand of people, substantially increase the convenience and precisely of operation Property, facilitate teacher side easily to control, side explanation course.

4th, the operating method of the control box adjustment position is：Control box is directly dragged to default position, led to Cross neck and the decorative pearl on top of an official cap can voluntarily be realized spacing, release the convenient direction to power of both hands and be marked.With reference to above-mentioned drawstring Pulling method, make in an experiment, the control of adjustment and pulling force to the first dynamometer and the angle of the second dynamometer passes through dragging Control box and turning knob can be completed, and the fixation of end-state can be fixed automatically by the present apparatus, and operation is easy and convenient, Clearer, calm displaying whole experiment process.

5th, the storage trough conveniently places the stationery such as ruler, set square, writing on blackboard.

6th, the setting of the blank, the drawing after experiment is facilitated.Directly the direction of power is marked, drawn, It is very convenient.

7th, the neck is two rows, and fixed limit effect is preferable.The neck is densely distributed on camber line slideway, Neng Gouti The high accuracy controlled the first dynamometer and the second dynamometer angle.Neck in the linear ramp is corresponding with B points, experiment After demonstration is partially completed, two control box are individually fixed in herein, the first dynamometer and the second dynamometer can be made horizontal solid The middle and upper part of rectangular portion is scheduled on, concedes enough spaces, the convenient white space for utilizing lower section is drawn.Stretch cord can be allowed to put simultaneously Pine keeps effective elastic force, increases the service life.

Brief description of the drawings

Accompanying drawing 1 is structural representation of the present utility model.

Accompanying drawing 2 is the positive fragmentary sectional view of the utility model.

Accompanying drawing 3 is the profile of the utility model control box.

Accompanying drawing 4 is the A portions enlarged drawing of the utility model accompanying drawing 1.

Label shown in accompanying drawing：

1st, rectangular portion；2nd, half-round；3rd, slideway；4th, control box；5th, stretch cord；6th, annulus；7th, the first dynamometer；8th, second Dynamometer；9th, drawstring；10th, upper plenum；11st, lower cavity；12nd, axis；13rd, knob；14th, sleeve pipe；15th, lower tooth disk；16th, upper tooth Disk；17th, the first spring；18th, slot；19th, second spring；20th, the decorative pearl on top of an official cap；21st, neck；22nd, peg；23rd, storage trough.

Embodiment

With reference to specific embodiment, the utility model is expanded on further.It should be understood that these embodiments are merely to illustrate this Utility model rather than limitation the scope of the utility model.In addition, it is to be understood that reading the content of the utility model instruction Afterwards, those skilled in the art can make various changes or modifications to the utility model, and these equivalent form of values equally fall within this Shen Please limited range.

The parallelogram rule confirmatory experiment exhibiting device of the power of being described in the utility model, agent structure include displaying Apparatus required for experiment link is incorporated on Graphic Panel by plate, the present apparatus, and teacher does not have to individually prepare again, avoids trouble, And without the equipment of the dangerous factors such as drawing pin, facilitate using and managing for apparatus.The Graphic Panel includes the rectangular portion 1 on top With the half-round 2 of bottom, mark has the corresponding O points in the center of circle of half-round 2, the week side of boss of the Graphic Panel on the Graphic Panel Provided with slideway 3, control box 4 is slidably connected in the slideway 3, promotes two control box 4 it is slid down to half from slideway 3 The downside in circle portion 2 is simultaneously fixed on two appropriate locations so that the first dynamometer 7 and the relative O points of the second dynamometer 8 formed it is default Angle.The top of the rectangular portion 1 it is placed in the middle be provided with stretch cord 5, the upper end of the stretch cord 5 is fixedly connected with rectangular portion 1, The lower end of the stretch cord 5 is provided with annulus 6, and the annulus 6 is provided with can be along the first dynamometer 7 and second of its circle swing Dynamometer 8, drawstring 9 is connected on the dynamometer 8 of the first dynamometer 7 and second, the drawstring 9 is wound on control box 4 It is interior and the folding and unfolding of control box 4 can be passed through.Operational control box 4 furls drawstring 9, is surveyed respectively to connecting the first dynamometer 7 and second Power meter 8 produces pulling force, and then the annulus 6 of the bottom of stretch cord 5 is located at O points, you can mark.Hand is replaced by furling drawstring 9 Pull to control pulling force size, it is more convenient and accurate to control.Whole operation only needs the control box 4 of operation periphery, will not be right Experimentation is blocked, and facilitates observation of students.

In order to facilitate explanation, classroom efficiency is improved, is also marked with A points and B points on the Graphic Panel, the A points are elastic force Rope 5 is fixed on upper extreme points in rectangular portion 1, and the B points are lower extreme point of the stretch cord 5 under natural length, the A points, B points and O points are arranged on a vertical straight line from top to bottom.By the A points, B points and O points set, and make A, B and stretch cord 5 certainly The top bottom position of right state is corresponding, and so as to save the time on class, the preamble for simplifying no technology content prepares step Suddenly, teacher is enable to be absorbed in the explanation to these points.

In order to facilitate control drawstring 9, the control box 4 is provided with upper plenum 10 and lower cavity 11 from top to bottom, wherein, overhead Chamber 10 is used for controlling blocking or unclamping for folding and unfolding drawstring 9, vertical provided with the axis being rotatablely connected with it in the control box 4 12, the axis 12 runs through upper plenum 10 and lower cavity 11, and the top of the axis 12 exposed to outside and is provided with knob 13, revolved Button 13 is the folding and unfolding for controlling rope, and the bottom surface of knob 13 is provided with the sleeve pipe 14 for being secured to connection, described sleeve pipe 14 run through the top of upper plenum 10, and the bottom side of described sleeve pipe 14 is fixedly connected with the lower tooth disk 15 of annular, the upper plenum 10 Top be provided with the upper fluted disc 16 of annular, the upper fluted disc 16 is arranged at the top of lower tooth disk 15, the bottom surface of the upper fluted disc 16 And the top surface of lower tooth disk 15 is provided with the tooth being meshed, and the first spring 17, first spring 17 are additionally provided with the upper plenum 10 Be enclosed on axis 12, press pressure knob 13 downwards, separate fluted disc 16 and lower tooth disk 15, knob 13 can be rotated so as to furling or Decontrol drawstring 9, to suitable dynamics after unclamp knob 13, upper fluted disc 16 and lower tooth disk 15 are engaged, you can locking, drawstring 9 is fixed, Hand control pulling force and fixed pulling force without relying upon people, substantially increase the convenience and accuracy of operation, facilitate teacher side Easily control, side explanation course.The inner side surface of the control box 4 is provided with the lacing hole being connected with lower cavity 11, institute State drawstring 9 and enter lower cavity 11 through lacing hole, and the drawstring 9 is on axis 12, on the bottom surface of the lower cavity 11 Provided with the slot 18 being adapted with axis 12.(the first spring 17 is in nature for distance of the bottom surface of slot 18 apart from the bottom of axis 12 Under state) more than the distance that fluted disc 16 and lower tooth disk 15 are totally released can be made, so as to provide downward stroke for axis 12 Space.

In order to facilitate fixed control box 4, and accurately control predetermined angle.The bottom surface of the control box 4 is provided with cavity, institute State and second spring 19 and the decorative pearl on top of an official cap 20 are provided with cavity, the inner of the decorative pearl on top of an official cap 20 is connected with second spring 19, the decorative pearl on top of an official cap 20 Outer end is exposed to outside the bottom surface of control box 4 from the stretching of cavity, and the bottom surface of the slideway 3 is provided with and the activity clamping of the decorative pearl on top of an official cap 20 Spherical neck 21, the neck 21 are distributed along slideway 3.Control box 4 is directly dragged to default position, passes through card Groove 21 and the decorative pearl on top of an official cap 20 can voluntarily be realized spacing, release the convenient direction to power of both hands and are marked.With reference to above-mentioned drawstring 9 Pulling method, make in an experiment, the control of adjustment and pulling force to the first dynamometer 7 and the angle of the second dynamometer 8 is by dragging Dynamic control box 4 and turning knob 13 can be completed, and the fixation of end-state can be fixed automatically by the present apparatus, and operation is light Convenient, clearer, calm displaying whole experiment process.

The annulus 6 swings the peg 22 being connected with it provided with two, one end of the peg 22 be enclosed on annulus 6 and It is connected with annulus 6 along its circumferential slippage, the one end of the peg 22 away from annulus 6 connects with the first dynamometer 7 or the second dynamometer 8 Connect.

The top of the Graphic Panel is provided with horizontal storage trough 23.It is convenient to place the stationery such as ruler, set square, writing on blackboard.

The surface of the Graphic Panel is provided with blank.Directly the direction of power is marked, drawn, it is very convenient.

The slideway 3 includes the linear ramp 3 for being arranged at the both sides of rectangular portion 1, and is arranged at the camber line cunning of the side of half-round 2 Road 3, the bottom of the linear ramp 3 is corresponding with the top of homonymy camber line slideway 3 respectively and connects, and is arranged in camber line slideway 3 The week side of boss annular array of the neck 21 along half-round 2, the neck 21 is densely distributed on camber line slideway 3, it is possible to increase to One dynamometer 7 and the accuracy of the angle of the second dynamometer 8 control.It is arranged at the neck 21 in linear ramp 3 and the water where B points Prosposition is put corresponding.After experimental demonstration is partially completed, two control box 4 are individually fixed in herein, the first dynamometer 7 can be made The middle and upper part of rectangular portion 1 is horizontally fixed on the second dynamometer 8, concedes enough spaces, the convenient white space for utilizing lower section Draw.Stretch cord 5 can be allowed to loosen simultaneously and keep effective elastic force, increased the service life.

Embodiment：The parallelogram rule confirmatory experiment exhibiting device of power, including Graphic Panel, the surface of the Graphic Panel Provided with the blank for writing.The rectangular portion 1 of the Graphic Panel including top and the half-round 2 of bottom, the half-round 2 it is straight Footpath is corresponding with the width of rectangular portion 1, and the upside of the half-round 2 is connected and is integrally formed with the downside of rectangular portion 1, and described half The downside side in circle portion 2 is semicircle, and being marked on the Graphic Panel has the corresponding O points in the center of circle of half-round 2, the displaying The week side of boss of plate is provided with slideway 3, and control box 4 is slidably connected in the slideway 3, and avris of the slideway 3 along Graphic Panel is set, Include the linear ramp 3 on top and the camber line slideway 3 of bottom, the linear ramp 3 is arranged at the both sides of rectangular portion 1, described Camber line slideway 3 is arranged at the avris of half-round 2, the lower end of the linear ramp 3 connected with the top of the homonymy of camber line slideway 3 and Corresponding, the slideway 3 is made up of interior retaining wall and outer retaining wall, and the top of the interior retaining wall and outer retaining wall is equipped with card article, the card Bar it is relative be arranged at inboard, be respectively equipped with the inboard side wall and outside side wall of the control box 4 with card article be adapted cunning Groove, the chute is slidably connected with card article, and card article is arranged in chute, control box 4 can either be formed it is spacing, by control box 4 are confined to run in slideway 3, convenient installation again.The bottom surface of the control box 4 is provided with cavity, and second is provided with the cavity Spring 19 and the decorative pearl on top of an official cap 20, the inner of the decorative pearl on top of an official cap 20 are connected with second spring 19, the stretching of the outer end of the decorative pearl on top of an official cap 20 from cavity Outside the bottom surface of control box 4, the cavity from-inner-to-outer is provided with two rows, so that stretching out two rows on the bottom surface of control box 4 The decorative pearl on top of an official cap 20 of energy elastic telescoping, the bottom surface of the slideway 3 are provided with the spherical neck 21 with the activity clamping of the decorative pearl on top of an official cap 20, pass through card The clamping of groove 21 and the decorative pearl on top of an official cap 20 can be enforced control box 4, can just release spacing by control box 4 in certain dynamics upper limit. The neck 21 is distributed along slideway 3, and distribution situation is：The neck 21 is double, is uniformly distributed on camber line slideway 3, Be each provided with a pair of necks 21 on the top of the linear ramp 3 of both sides, these two pair be arranged at the neck 21 on the top of linear ramp 3 with The position of B points is corresponding.So as to realize following effect：That is, control box 4 can be provided with neck 21 in camber line slideway 3 Position is spacing, because the setting of neck 21 is more intensive, therefore the differential seat angle of the position of the stop of control box 4 can be made very small.Side Just experiment is completed, when being charted, two control box 4 are respectively clamped into the neck 21 on the top of linear ramp 3, so as to such as Fig. 2 It is shown, stretch cord 5 is loosened and is recovered, while it is vacant go out Graphic Panel below most of space, it is convenient to draw.The square The top in shape portion 1 it is placed in the middle be provided with stretch cord 5, the upper end of the stretch cord 5 is fixedly connected with rectangular portion 1, on the Graphic Panel A points and B points are also marked with, the A points are the upper extreme point that stretch cord 5 is fixed in rectangular portion 1, and the B points are stretch cord 5 certainly Lower extreme point under right length, the A points, B points and O points are arranged on a vertical straight line from top to bottom.The stretch cord 5 Lower end is provided with annulus 6, and the annulus 6 swings the peg 22 being connected with it provided with two, and one end of the peg 22, which is provided with, to be led to Hole, the annulus 6 are slidably connected through through hole and with through hole, i.e., described peg 22 is enclosed on annulus 6 by through hole, the peg 22 one end away from annulus 6 is connected with the first dynamometer 7 or the second dynamometer 8.The dynamometer 8 of first dynamometer 7 and second Outer end be connected with drawstring 9, the drawstring 9 is in control box 4 and can pass through the folding and unfolding of control box 4.

The control box 4 is provided with upper plenum 10 and lower cavity 11 from top to bottom, in the control box 4 it is vertical be provided with and its The axis 12 of rotation connection, the axis 12 run through upper plenum 10 and lower cavity 11, and the top of the axis 12 is exposed to outside And knob 13 is provided with, the bottom surface of knob 13 is provided with the sleeve pipe 14 for being secured to connection, and described sleeve pipe 14 runs through upper plenum 10 Top, and the bottom of sleeve pipe 14 is arranged in upper plenum 10, and the bottom side of described sleeve pipe 14 is fixedly connected with the lower tooth disk of annular 15, the top of the upper plenum 10 is provided with the upper fluted disc 16 of annular, and the upper fluted disc 16 is arranged at the top of lower tooth disk 15, described The bottom surface of upper fluted disc 16 and the top surface of lower tooth disk 15 are provided with the tooth being meshed, and the first spring 17 is additionally provided with the upper plenum 10, First spring 17 is enclosed on axis 12, and the top of first spring 17 is arranged in sleeve pipe 14, and the first spring 17 Top is in contact with knob 13, and the bottom of first spring 17 falls on the bottom surface of upper plenum 10.The inner side of the control box 4 Side is provided with the lacing hole being connected with lower cavity 11, and the drawstring 9 enters lower cavity 11, and the drawstring through lacing hole 9 on axis 12, and the bottom surface of the lower cavity 11 is provided with the slot 18 being adapted with axis 12.When the first spring 17 is During free state, the bottom of the axis 12 is located at the lower section of slot 18, and the bottom of the axis 12 is apart from the bottom surface of slot 18 There is the distance that fluted disc 16 can be made to be sufficiently separated with lower tooth disk 15.

Claims

1. the parallelogram rule confirmatory experiment exhibiting device of power, it is characterised in that：Including Graphic Panel, the Graphic Panel includes The rectangular portion (1) on top and the half-round (2) of bottom, mark has the corresponding O in the center of circle of half-round (2) on the Graphic Panel Point, the week side of boss of the Graphic Panel are provided with slideway (3), control box (4), the rectangular portion (1) are slidably connected in the slideway (3) Top it is placed in the middle be provided with stretch cord (5), the upper end of the stretch cord (5) is fixedly connected with rectangular portion (1), the stretch cord (5) lower end is provided with annulus (6), and the annulus (6), which is provided with, to be surveyed along the first dynamometer (7) of its circle swing and second Power meter (8), is connected to drawstring (9) on first dynamometer (7) and the second dynamometer (8), the drawstring (9) wound on Control box (4) is interior and can pass through control box (4) folding and unfolding.

2. the parallelogram rule confirmatory experiment exhibiting device of power according to claim 1, it is characterised in that：The displaying A points and B points are also marked with plate, the A points are the upper extreme point that stretch cord (5) is fixed in rectangular portion (1), and the B points are bullet Lower extreme point of the power rope (5) under natural length, the A points, B points and O points are arranged on a vertical straight line from top to bottom.

3. the parallelogram rule confirmatory experiment exhibiting device of power according to claim 1, it is characterised in that：The control Box (4) is provided with upper plenum (10) and lower cavity (11) from top to bottom, in the control box (4) vertical being provided be rotatablely connected with it Axis (12), the axis (12) runs through upper plenum (10) and lower cavity (11), and the top of the axis (12) is exposed to outer Portion and knob (13) is provided with, knob (13) bottom surface is provided with the sleeve pipe (14) for being secured to connection, and described sleeve pipe (14) is passed through The top of cavity (10) is put on, and the bottom side of described sleeve pipe (14) is fixedly connected with the lower tooth disk (15) of annular, the upper plenum (10) top is provided with the upper fluted disc (16) of annular, and the upper fluted disc (16) is arranged at the top of lower tooth disk (15), the upper tooth The bottom surface of disk (16) and the top surface of lower tooth disk (15) are provided with the tooth being meshed, and the first spring is additionally provided with the upper plenum (10) (17), first spring (17) is enclosed on axis (12), and the inner side surface of the control box (4) is provided with and lower cavity (11) The lacing hole being connected, the drawstring (9) enters lower cavity (11) through lacing hole, and the drawstring (9) is wound on axis (12) on, the bottom surface of the lower cavity (11) is provided with the slot (18) being adapted with axis (12).

4. the parallelogram rule confirmatory experiment exhibiting device of power according to claim 3, it is characterised in that：The control The bottom surface of box (4) is provided with cavity, and second spring (19) and the decorative pearl on top of an official cap (20), the inner of the decorative pearl on top of an official cap (20) are provided with the cavity It is connected with second spring (19), the outer end of the decorative pearl on top of an official cap (20) is exposed to outside the bottom surface of control box (4) from the stretching of cavity, described The bottom surface of slideway (3) is provided with spherical neck (21) with the decorative pearl on top of an official cap (20) activity clamping, and the neck (21) is along slideway (3) Distribution.

5. the parallelogram rule confirmatory experiment exhibiting device of power according to claim 1, it is characterised in that：The annulus (6) peg (22) being connected is swung with it provided with two, one end of the peg (22) is enclosed on annulus (6) and and annulus (6) connected along its circumferential slippage, the one end of the peg (22) away from annulus (6) and the first dynamometer (7) or the second dynamometer (8) connect.

6. the parallelogram rule confirmatory experiment exhibiting device of power according to claim 1, it is characterised in that：The displaying The top of plate is provided with horizontal storage trough (23).

7. the parallelogram rule confirmatory experiment exhibiting device of power according to claim 1, it is characterised in that：The displaying The surface of plate is provided with blank.

8. the parallelogram rule confirmatory experiment exhibiting device of power according to claim 1, it is characterised in that：The slideway (3) include the linear ramp (3) for being arranged at rectangular portion (1) both sides, and be arranged at the camber line slideway (3) of half-round (2) side, institute It is corresponding with the top of homonymy camber line slideway (3) respectively and connect to state the bottom of linear ramp (3), is arranged in camber line slideway (3) The week side of boss annular array of the neck (21) along half-round (2), be arranged at the neck (21) in linear ramp (3) with where B points Horizontal level is corresponding.