CN207302433U - The quick demonstrator of Archimedes' principle - Google Patents

Abstract

The quick demonstrator of Archimedes' principle, is related to teaching instrument and equipment technical field, it includes stent, spilling water cup, weight, the water receiving container of tubular structure, a spring with pointer and the label for mark pointer position；Stent includes upright bar, cross bar and the backing ring below cross bar, and cross bar and backing ring are connected to upright bar, adjustable above and below the height of backing ring；The upper end connection cross bar of spring, weight is arranged in water receiving container intracavity, weight and water receiving container are suspended to lower spring end, backing ring holds spilling water cup, notch is opened up on water receiving container bottom end closure and its housing sidewall, spilling water cup and backing ring can be put into the underface that weight is placed in water receiving container intracavity through notch.The quick demonstrator structure of the Archimedes' principle is compact and can intuitively disclose law of buoyancy, the step of experimental teaching can save numerical computations after demonstration operation is carried out with the quick demonstrator of the Archimedes' principle, so that whole experiment process is more brief quick, efficiency of teaching higher.

Description

The quick demonstrator of Archimedes' principle

Technical field

Teaching instrument and equipment technical field is the utility model is related to, more particularly to a kind of Archimedes' principle is quickly demonstrated Instrument.

Background technology

Archimedes' principle is a very important knowledge point in junior middle school physics teaching.At present, used in daily teaching Law of buoyancy apparatus for demonstrating it is mostly similar with the structure in document " CN205645042U ", be all the cross bar in two iron stands Upper hang respectively sets the first weight beam and second spring dynamometer, suspends a weight in midair in the lower section of the first weight beam, A water receiving container is suspended in midair in the lower section of second spring dynamometer, places one again on the lower section table top of weight with spillway hole Water container.

Teacher at least needs to lead student to complete following two big steps when carrying out Demonstrating with above device.

1st, demonstration operation：Before experiment starts, the initial value measured by two weight beams is first recorded, then by weight It is gradually immersed into the water of water container, by the buoyancy of water, the numerical value that the first weight beam measures in the process is gradual Diminish, the water that weight arranges is discharged from spillway hole and caught by water receiving container, and the numerical value that second spring dynamometer measures gradually becomes Greatly, when weight by water buoyancy in floating state and spillway hole anhydrous discharge when, presentation process terminates, and records two Weight beam numerical value measured at this moment（Final numerical value）.

2nd, numerical computations：The first weight beam and second spring dynamometer are calculated respectively starts and demonstrate knot in demonstration Two time points of beam measure the variable quantity of numerical value, the result of calculation of two values variable quantity are then contrasted, if above-mentioned two numerical value Variable quantity is very close（If two values variable quantity difference is larger, then it represents that the failure of an experiment, needs accent to start）, it is contemplated that experiment The presence of error, it is believed that the corresponding numerical value change amount of the first weight beam and the numerical value corresponding to second spring dynamometer Variable quantity is equal, i.e., buoyancy suffered by weight arranges the gravity of liquid equal to it.

As can be seen from the above description, current law of buoyancy apparatus for demonstrating has the following disadvantages：1st, overall structure is not tight enough Gather.2nd, principle discloses not directly perceived enough.3rd, demonstration operation is required for what two weight beams of record measured before and after Numerical value, it is also necessary to calculate according to the data measured, compare buoyancy and the gravity size that arranges liquid, step is complicated, take compared with It is long.

Utility model content

Technical problem to be solved in the utility model is to provide a kind of compact-sized, experimentation briefly and can intuitively take off Show the quick demonstrator of Archimedes' principle of law of buoyancy.

In order to solve the above-mentioned technical problem, the utility model adopts the following technical solution：A kind of Archimedes' principle is quick Demonstrator, including the water receiving container of stent, spilling water cup, weight, tubular structure, a spring with pointer and for marking State the label of pointer position；

The stent includes upright bar, cross bar and the backing ring below the cross bar, and the cross bar and backing ring are connected to Upright bar, it is adjustable above and below the height of the backing ring；

The upper end connection cross bar of the spring, the weight are arranged in water receiving container intracavity, weight and the water receiving container Lower spring end is suspended to, the backing ring is held spilling water cup, opened up on the water receiving container bottom end closure and its housing sidewall scarce Mouthful, the spilling water cup and backing ring can be put into the underface that weight is placed in water receiving container intracavity through notch.

Wherein, the label to be matched with spring, for showing the dial of lower spring end value of thrust or graduated scale.

Alternatively, the label is a horizontally disposed straight-bar, the straight-bar is connected to vertical by a crossing grip holder Bar, it is adjustable above and below the height of the straight-bar.

Further, the spillway hole of the spilling water cup connects a flexible rubber hose, and the flexible rubber hose controls it by a clip Discharge pipe line break-make.

Alternatively, the spillway hole of the spilling water cup connects a flexible rubber hose, one is equipped with the drain port of the flexible rubber hose The plug that can be extracted.

Preferably, the upright bar tapping and a screw is connected, is arranged with a connector, the backing ring in the upright bar On be connected with a horizontally disposed strut, the strut is connected by connector with upright bar, and the screw is located under connector Side, the connector are equipped with dive key, offer the guide key groove to match with dive key in the upright bar vertically, revolve The dynamic screw can push connector and up move, so as to adjust the height of the backing ring.

Further, be also arranged with a plane bearing in the upright bar, the plane bearing be arranged on screw and connector it Between, the upper faced washer of the plane bearing abuts against connector, lower plane packing ring abuts against screw.

As a kind of preferred embodiment, the weight includes No. 1 mineral water bottle of a transparent plastics material, described Saline solution is loaded with No. 1 mineral water bottle and its bottleneck is sealed by headpin lid.

Wherein, the water receiving container is No. 2 mineral water bottles of transparent plastics material, the side of No. 2 mineral water bottles One piece is excavated on wall, so as to form the notch, the bottleneck of No. 2 mineral water bottles is covered by No. 2 bottle caps.

Further, the headpin lid is connected below No. 2 bottle caps and by the first rope yarn with No. 2 bottle caps, described No. 2 Bottle cap passes through the lower end of the second rope yarn connecting spring again.

The quick demonstrator of Archimedes' principle provided by the utility model can carry out demonstration operation in the following ways：It is first First in spilling water cup load water, make liquid level in spilling water cup concordant with spillway hole, then spilling water cup is held and by it from water receiving with backing ring The notch of container side wall is put into water receiving container intracavity, while ensures that spilling water cup is in the underface of weight, followed by mark The position that pointer is currently located under substance markers, then up moves backing ring and spilling water cup along upright bar（Heighten backing ring height）, make weight Thing, which is immersed in the water of spilling water cup, is in suspended state, and spring retraction, pointer up move at this time, at the same time, are arranged by weight Water gradually flowed out from spillway hole, and caught by water receiving container, since water receiving container and weight are suspended to lower spring end together, with The water caught in water receiving container gradually to increase, pointer gradually moves down, and after spillway hole draining, pointer returns to initially The position that label is marked during state（It should be noted that during aforesaid operations, weight, which is immersed in spilling water cup, arranges water Speed be preferably much larger than the speed that water is flowed out from spillway hole, the amplitude that otherwise pointer up moves is very limited, is not easy to learn Raw observation and understanding）.

Force analysis is carried out to above-mentioned presentation process again below：After weight is immersed in the water, pointer up moves, and illustrates this When pulling force down suffered by spring diminish, that is to say, that a power opposite with gravity direction is acted on weight（I.e. water is floating Power）, after spillway hole draining, all caught from the water of spillway hole outflow by water receiving container, pointer, which down returns to initial position, is Because the gravity indirectly-acting of water in water receiving container is caused by lower spring end, that is to say, that at this time in water receiving container water gravity and water To the buoyant equilibrium of weight, i.e., buoyancy direction suffered by water-immersed weight is opposite with its gravity direction（Buoyancy direction in other words Vertically upward）, gravity of the buoyancy size equal to its water arranged.

The beneficial effects of the utility model are：First, in the quick demonstrator of Archimedes' principle involved by the utility model In, weight, backing ring and spilling water cup are placed in the inner cavity of water receiving container, and it only uses a stent, a spring（It is existing Technology uses two weight beams）, therefore its more existing law of buoyancy apparatus for demonstrating is more compact in structure, overall volume Smaller.Secondly, during experimental demonstration operation is carried out with the utility model, same pointer first moves down up, again Process can more intuitively disclose the principle of buoyancy generation, and without by calculating, that student can be allowed to know clearly is floating Force direction is vertically upward and its size is equal with the gravity for arranging water.In addition, can when the utility model is used for classroom instruction The step of to save numerical computations after demonstration operation so that whole experiment process is more brief quick, efficiency of teaching higher.

Brief description of the drawings

Fig. 1 is to carry out experimental demonstration operation with the quick demonstrator of the Archimedes' principle in embodiment 1, in the starting stage When, the view of the quick demonstrator of the Archimedes' principle；

Fig. 2 is to carry out experimental demonstration operation with the quick demonstrator of the Archimedes' principle in embodiment 1, in the interstage When, the view of the quick demonstrator of the Archimedes' principle；

Fig. 3 is to carry out experimental demonstration operation with the quick demonstrator of the Archimedes' principle in embodiment 1, in ending phase When, the view of the quick demonstrator of the Archimedes' principle；

Fig. 4 is with the quick demonstrator of the Archimedes' principle in embodiment 2 carries out experimental demonstration operation, in a period of time in stage, The view of the quick demonstrator of the Archimedes' principle；

Fig. 5 is to carry out experimental demonstration operation with the quick demonstrator of the Archimedes' principle in embodiment 2, in stage two, The view of the quick demonstrator of the Archimedes' principle；

Fig. 6 is to carry out experimental demonstration operation with the quick demonstrator of the Archimedes' principle in embodiment 2, in stage three, The view of the quick demonstrator of the Archimedes' principle；

Fig. 7 is to carry out experimental demonstration operation with the quick demonstrator of the Archimedes' principle in embodiment 2, in stage four, The view of the quick demonstrator of the Archimedes' principle；

Fig. 8 is to carry out experimental demonstration operation with the quick demonstrator of the Archimedes' principle in embodiment 2, in stage five, The view of the quick demonstrator of the Archimedes' principle；

Fig. 9 is the partial enlarged view at A positions in Fig. 1；

Figure 10 is the partial enlarged view at A positions in Fig. 2；

Figure 11 is the partial enlarged view at A positions in Fig. 3；

Figure 12 is the partial enlarged view at A positions in Fig. 4；

Figure 13 is the partial enlarged view at A positions in Fig. 5；

Figure 14 is the partial enlarged view at A positions in Fig. 6；

Figure 15 is the partial enlarged view at A positions in Fig. 7；

Figure 16 is the partial enlarged view at A positions in Fig. 8；

In figure：

1 --- stent 2 --- spilling water cup 3 --- weight

4 --- water receiving container 5 --- spring 6 --- labels

7 --- connector 8 --- plane bearing 9 --- headpin lids

10 --- No. 2 bottle caps 11 --- the first rope yarn 12 --- second rope yarns

13 --- screw 1a --- upright bar 1b --- cross bars

1c --- backing ring 2a --- flexible rubber hose 4a --- notches

1a1 --- guide key groove 1c1 --- strut.

Embodiment

In the description of the utility model, it is to be understood that term " on ", " under ", " vertical ", " level ", " top ", The orientation or position relationship of the instruction such as " bottom ", " interior ", " outer " are based on orientation shown in the drawings or position relationship, merely to just In description the utility model and simplified description, rather than indicate or imply that signified device or element must be with specifically square Position, with specific azimuth configuration and operation, therefore it is not intended that limitation to the utility model.

For the ease of the understanding of those skilled in the art, the utility model is made with reference to embodiment and attached drawing further Explanation, the content that embodiment refers to not is restriction to the utility model.

Need to illustrate in advance, 2 embodiments of the utility model are all based on following base case, the base case Structure may be referred to any one width in Fig. 1-8, in Fig. 1-8, the quick demonstrator of Archimedes' principle involved by the utility model Include stent 1, spilling water cup 2, weight 3,4, springs 5 with pointer of water receiving container of tubular structure and refer to for marking The label 6 of pin position, offers spillway hole on the side wall of spilling water cup 2；

Stent 1 includes upright bar 1a, cross bar 1b and the backing ring 1c below cross bar 1b, cross bar 1b and backing ring 1c is connected to Upright bar 1a, it is adjustable above and below the height of backing ring 1c；

The upper end connection cross bar 1b of spring 5, weight 3 are arranged in 4 inner cavity of water receiving container, and weight 3 and water receiving container 4 suspend in midair In 5 lower end of spring, backing ring 1c holds spilling water cup 2, and notch 4a, spilling water are opened up in 4 bottom end closure of water receiving container and its housing sidewall 2 and backing ring 1c of cup can be put into the underface that weight 3 is placed in 4 inner cavity of water receiving container through notch 4a.

Embodiment 1

Shown in structural reference Fig. 1-3 of the quick demonstrator of Archimedes' principle involved by the present embodiment, stated to simplify, this reality Apply content identical with base case in example to omit, repeat no more.

The difference of the present embodiment and base case mainly includes：Label 6 employs a horizontally disposed straight-bar, The straight-bar is connected to upright bar 1a by a crossing grip holder, adjustable above and below the height of straight-bar.For need to only verify buoyancy direction with The experiment that gravity direction is opposite and its size is equal with arranging liquid gravity（It need not know the occurrence of buoyancy）, label 6 adopts With the straight-bar that can be adjusted up and down, the structure of label 6 is so farthest simplified, while student views of being also more convenient for Examine.

In the present embodiment, tapping and a screw 13 is connected with upright bar 1a, a connection is also arranged with upright bar 1a A horizontally disposed strut 1c1 is connected with first 7, backing ring 1c, strut 1c1 is connected by connector 7 with upright bar 1a, screw 13 Positioned at the lower section of connector 7, connector 7 is equipped with dive key, offers what is matched with dive key vertically on upright bar 1a Guide key groove 1a1, turn screw 13 can push connector 7 and up move, so as to fulfill the height of adjustment backing ring 1c.Pass through turn Screw 13 pushes connector 7 and up moves, and then is up moved with backing ring 1c and its spilling water cup 2 held, such design Can allowing backing ring 1c and spilling water cup 2, up moving process is more steady, avoids the water in spilling water cup 2 from spilling because moving process shakes Situation.

Further, a plane bearing 8 is also arranged with upright bar 1a, plane bearing 8 is arranged on screw 13 and connector 7 Between, the upper faced washer of plane bearing 8 abuts against connector 7, lower plane packing ring abuts against screw 13.In screw 13 with being connected The purpose of plane bearing 8 is set to be to reduce the frictional force between screw 13 and connector 7 between first 7 so that screw 13 rotates It is more smooth.

It should be noted that being stated to simplify, tapping structure, screw 13 and the plane bearing 8 on foregoing upright bar 1a are not Show in figs 1-3, the concrete structure of above-mentioned component and its mutual position connection relation may be referred in embodiment 2 Attached drawing 4-8 shown in.

As a kind of preferred embodiment, foregoing weight 3 includes No. 1 mineral water bottle of transparent plastics material, and 1 Saline solution is loaded with number mineral water bottle and its bottleneck is sealed by headpin lid 9.Water receiving container 4 is a transparent plastics material No. 2 mineral water bottles, one piece is excavated on the side wall of No. 2 mineral water bottles, so as to form notch 4a, the bottleneck of No. 2 mineral water bottles Covered by No. 2 bottle caps 10.Headpin lid 9 is positioned at No. 2 lower sections of bottle cap 10 and is connected by the first rope yarn 11 with No. 2 bottle caps 10,2 Number bottle cap 10 passes through the lower end of 12 connecting spring 5 of the second rope yarn again.In the preferred solution, weight 3 contains saline solution to be internal No. 1 mineral water bottle, No. 2 mineral water bottles that water receiving container 4 is transparent plastics material, the benefit so designed has：1st, saline solution It is readily available.2nd, it is more slightly higher than clear water to contain No. 1 mineral water bottle averag density of saline solution, can so allow No. 1 mineral water bottle to soak The displacement of volume entered in water is larger, can allow pointer up mobile range bigger, is more convenient for observing.3rd, transparent mineral water bottle is easy to Obtain, and its material is transparent, No. 1 mineral water bottle can be allowed to immerse in spilling water cup 2, the process of 2 draining of spilling water cup all intuitively may be used See.

Fig. 1-3 and Fig. 9-11 is shown carries out demonstration operation with the quick demonstrator of the Archimedes' principle in the present embodiment Process, for ease of statement, is divided into starting stage, interstage and ending phase, separately below to above-mentioned by demonstration operation process Three phases are described specifically.

Starting stage：The quick demonstrator of Archimedes' principle the starting stage state as shown in Figure 1, in the starting stage, Spilling water cup 2 is in the lower section of weight 3, and the water level face in spilling water cup 2 is concordant with spillway hole, from fig. 9, it can be seen that at this time at pointer With straight-bar（Label 6）Concordant position.

Interstage：As shown in Figure 2, turn screw 13 pushes spilling water cup 2 and up moves so that weight 3 immerses spilling water cup 2 Water in, liquid level raises in spilling water cup 2, and the water that weight 3 arranges and is held from the spillway hole outflow on 2 side wall of spilling water cup by water receiving Device 4 is caught, and spring retraction, pointer up moves, from fig. 10 it can be seen that pointer has been moved into the top of straight-bar at this time.

Ending phase：With continuing for spillway hole draining, the water that weight 3 arranges all flow to water receiving container 4 from spillway hole In, as water increases in water receiving container 4, the pulling force suffered by spring 5 down becomes larger, and spring 5 extends, and pointer moves down.Ginseng See Fig. 3, after draining, liquid level is concordant with spillway hole once again in spilling water cup 2, with reference to Figure 11 as can be seen that pointer is once again at this time Return to the position concordant with straight-bar.

The stressing conditions for analyzing above three stage weight 3 are understood：After weight 3 is immersed in the water, pointer up moves, and says Pulling force suffered by bright spring at this time 5 down diminishes, that is to say, that a power opposite with gravity direction is acted on weight 3（I.e. The buoyancy of water）, after spillway hole draining, all caught from the water of spillway hole outflow by water receiving container 4, pointer down returns to initially Position is the gravity indirectly-acting because of water in water receiving container 4 caused by 5 lower end of spring, that is to say, that water in water receiving container 4 at this time Gravity and water to the buoyant equilibrium of weight 3, i.e., buoyancy direction suffered by water-immersed weight 3 is opposite with its gravity direction（Or Person says buoyancy direction vertically upward）, gravity of the buoyancy size equal to its water arranged.

In conclusion in the quick demonstrator of Archimedes' principle of the present embodiment, weight 3, backing ring 1c and spilling water cup 2 are equal It is positioned in the inner cavity of water receiving container 4, and it only uses 1, spring 5 of a stent（The prior art uses two springs Dynamometer）, therefore its more existing law of buoyancy apparatus for demonstrating is more compact in structure, overall volume also smaller.More importantly it is, During the quick demonstrator of the Archimedes' principle involved by the present embodiment carries out experimental demonstration operation, same pointer is first past Upper, process that is moving down again can more intuitively disclose the principle of buoyancy generation, and without that can allow by calculating Life knows clearly buoyancy direction vertically upward and its size is equal with the gravity for arranging water.In addition, by above-mentioned Archimedes The quick demonstrator of law is used to can saving the step of numerical computations after demonstration operation during classroom instruction, so that whole experiment Process is more brief quick, efficiency of teaching higher.

Embodiment 2

Referring to Fig. 4-8, embodiment 2 and the difference of embodiment 1 essentially consist in：1st, label 6 is to match, be used for spring 5 The dial or graduated scale of 5 lower end value of thrust of spring are shown（Stated to simplify, the dial or scale are not showed that in Fig. 4-8 Ruler, but label 6 is represented with a straight-bar as Fig. 1-3, it will be appreciated by those skilled in the art that, when using dial or After graduated scale is as label 6, straight-bar avoids the need for）.2nd, a flexible rubber hose 2a is connected at the spillway hole of spilling water cup 2, it is soft Sebific duct 2a passes through a clip（The clip is not shown in the accompanying drawings）Control its discharge pipe line break-make, or the row in flexible rubber hose 2a A plug that can be extracted is equipped with water end (W.E.) mouth.

The process that demonstration operation is carried out with the quick demonstrator of the Archimedes' principle in the present embodiment is described below, for convenience Statement, is divided into 5 stages to illustrate by demonstration operation process.

Stage one：As shown in Figure 4, spilling water cup 2 is in the lower section of weight 3, and the water level face in spilling water cup 2 is put down with spillway hole Together, it can be recognized from fig. 12 that pointer is in " 0 " graduation position.In fact, in fig. 12, pointer is in the position concordant with straight-bar Put, but for ease of understanding as, straight-bar is regarded to " 0 " scale position of dial or graduated scale in being described of the present embodiment Put.

Stage two：As shown in Figure 5, turn screw 13 pushes spilling water cup 2 and up moves so that weight 3 is gradually immersed into spilling water In the water of cup 2, liquid level is increased to above spillway hole in spilling water cup 2, and spring retraction, pointer up moves, as can be seen from Figure 13, Pointer has been moved into the top of " 0 " scale at this time.

Stage three：As shown in Figure 6, continuation turn screw 13 pushes spilling water cup 2 and up moves so that weight 3 continues to immerse In water and suspended state is in, liquid level raises again on the basis of the stage two in spilling water cup 2 at this time, reaches whole presentation process Peak, spring retraction, pointer is up moved to the peak of whole presentation process, it is seen from figure 14 that this stage refers to Needle gage is compared farther during stage two with a distance from " 0 " scale.The scale value of current pointer meaning is buoyancy value of the water to weight.

Stage four：The plug at the clip for clamping flexible rubber hose 2a, or the drain port of extraction flexible rubber hose 2a is unclamped, sees figure Shown in 7, the water that weight 3 arranges starts to be expelled in water receiving container 4 from flexible rubber hose 2a, and liquid level is gradually reduced, according to Figure 15, As liquid level declines, spring 5 is gradually stretched, and pointer moves down.

Stage five：With continuing for drainage procedure, the water that weight 3 arranges all is flow in water receiving container 4 from flexible rubber hose 2a, As water increases in water receiving container 4, the pulling force suffered by spring 5 down becomes larger, and spring 5 constantly extends, and pointer moves down.Ginseng See Fig. 8, after draining, liquid level is concordant with spillway hole once again in spilling water cup 2, with reference to Figure 16 as can be seen that pointer is once again at this time Return to and the position of " 0 " scale.

In above-mentioned five stages, the stressing conditions of weight 3 are similar to Example 1, repeat no more, it is emphasized that, In the present embodiment, by by the straight-bar in embodiment 1（Label 6）Dial or graduated scale are replaced with, while in spillway hole Go out connection a piece flexible rubber hose 2a, and set control flexible rubber hose 2a drainings clip or plug after, which quickly drills Show that instrument can directly read the size of buoyancy in experimentation（Embodiment 1 can only know that buoyancy size arranges water equal to weight 3 Gravity, it is impossible to definite obtains the concrete numerical value of buoyancy）, without going the concrete numerical value of calculating buoyancy again.

Finally, it is emphasized that, in the utility model, label 6 is not limited to use in above-mentioned two embodiment Structure, such as it can also be and be suspended in plummet below cross bar 1b by a rope, can also with the lowermost end of plummet Mark the position of pointer.It will be appreciated by those skilled in the art that as long as it can realize purpose of utility model, during practical application It can be made choice completely according to specific experiment condition.

Above-described embodiment is the preferable implementation of the utility model, and in addition, the utility model can be with other sides Formula is realized, any on the premise of the technical program design is not departed from obviously to replace in the protection model of the utility model Within enclosing.

In order to allow those of ordinary skill in the art more easily understand the utility model relative to the prior art improvement it Place, some attached drawings of the utility model and description have been simplified, and for the sake of clarity, present specification is omitted one A little other elements, those of ordinary skill in the art should be aware that these elements omitted also may make up the interior of the utility model Hold.

Claims (10)

1. the quick demonstrator of Archimedes' principle, including stent（1）, spilling water cup（2）, weight（3）, tubular structure water receiving container （4）, the spring with pointer（5）And for marking the label of the pointer position（6）, the spilling water cup（2）Side Spillway hole is offered on wall；

The stent（1）Including upright bar（1a）, cross bar（1b）And arranged on the cross bar（1b）The backing ring of lower section（1c）, the horizontal stroke Bar（1b）And backing ring（1c）It is connected to upright bar（1a）, the backing ring（1c）Height above and below it is adjustable；

The spring（5）Upper end connection cross bar（1b）, the weight（3）Arranged on water receiving container（4）In inner cavity, the weight （3）With water receiving container（4）It is suspended to spring（5）Lower end, the backing ring（1c）Hold spilling water cup（2）, the water receiving container（4） Notch is opened up in bottom end closure and its housing sidewall（4a）, the spilling water cup（2）And backing ring（1c）Can be through notch（4a）It is put into and connects Water container（4）Weight is placed in inner cavity（3）Underface.

2. the quick demonstrator of Archimedes' principle according to claim 1, it is characterised in that：The label（6）For with Spring（5）Matching, for showing spring（5）The dial or graduated scale of lower end value of thrust.

3. the quick demonstrator of Archimedes' principle according to claim 1, it is characterised in that：The label（6）For one The horizontally disposed straight-bar of root, the straight-bar are connected to upright bar by a crossing grip holder（1a）, the height of the straight-bar up and down can Adjust.

4. the quick demonstrator of Archimedes' principle according to claim 2, it is characterised in that：The spilling water cup（2）Overflow Water hole connects a flexible rubber hose（2a）, the flexible rubber hose（2a）Its discharge pipe line break-make is controlled by a clip.

5. the quick demonstrator of Archimedes' principle according to claim 2, it is characterised in that：The spilling water cup（2）Overflow Water hole connects a flexible rubber hose（2a）, the flexible rubber hose（2a）Drain port at be equipped with a plug that can be extracted.

6. the quick demonstrator of Archimedes' principle according to any one in claim 1-5, it is characterised in that：It is described vertical Bar（1a）Tapping simultaneously connects a screw（13）, the upright bar（1a）On be arranged with a connector（7）, the backing ring（1c）On It is connected with a horizontally disposed strut（1c1）, the strut（1c1）Pass through connector（7）With upright bar（1a）Connection, the silk It is female（13）Positioned at connector（7）Lower section, the connector（7）It is equipped with dive key, the upright bar（1a）On offer vertically The guide key groove to match with dive key（1a1）, screw described in turn（13）Connector can be push（7）Up move, so that Adjust the backing ring（1c）Height.

7. the quick demonstrator of Archimedes' principle according to claim 6, it is characterised in that：The upright bar（1a）On also cover Equipped with a plane bearing（8）, the plane bearing（8）Arranged on screw（13）With connector（7）Between, the plane bearing （8）Upper faced washer abut against connector（7）, lower plane packing ring abut against screw（13）.

8. the quick demonstrator of Archimedes' principle according to any one in claim 1-5, it is characterised in that：It is described heavy Thing（3）No. 1 mineral water bottle including a transparent plastics material, is loaded with saline solution and its bottleneck in No. 1 mineral water bottle Pass through headpin lid（9）Sealing.

9. the quick demonstrator of Archimedes' principle according to claim 8, it is characterised in that：The water receiving container（4）For No. 2 mineral water bottles of one transparent plastics material, are excavated one piece on the side wall of No. 2 mineral water bottles, so as to be formed described Notch（4a）, the bottleneck of No. 2 mineral water bottles passes through No. 2 bottle caps（10）Cover.

10. the quick demonstrator of Archimedes' principle according to claim 9, it is characterised in that：The headpin lid（9）Position In No. 2 bottle caps（10）Lower section simultaneously passes through the first rope yarn（11）With No. 2 bottle caps（10）Connection, No. 2 bottle caps（10）Pass through again Two rope yarns（12）Connecting spring（5）Lower end.