CN2173980Y - Junior middle school dynamics experiment box - Google Patents
Junior middle school dynamics experiment box Download PDFInfo
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- CN2173980Y CN2173980Y CN 93219347 CN93219347U CN2173980Y CN 2173980 Y CN2173980 Y CN 2173980Y CN 93219347 CN93219347 CN 93219347 CN 93219347 U CN93219347 U CN 93219347U CN 2173980 Y CN2173980 Y CN 2173980Y
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Abstract
The utility model relates to an experiment box for dynamics in junior middle schools. The utility model comprises a box body, a multifunctional end head, a trolley, a large barrel, a small barrel, a beam, a pulley wheel, a pulley yoke, weight blocks, a weight bracket, a weight beam, etc., wherein, a plurality of elements have multiple functions. When the utility model is used, various elements are combined together through the mode of inserting connection, etc. The experiment box for dynamics in junior middle schools can be used for finishing demonstration experiments of the dynamical section and partial students' experiments required in the teaching program of the junior physics of nine-year compulsory education.
Description
The utility model provides a kind of junior middle school's Experiments of Machanics box, and this experiment box belongs to instruments used for education,, can use for the individual of Faculty and Students with the hall experimental apparatus for a kind of.This experiment box can be finished mechanics part lecture experiment and the part student experimenting that requires in the nine-year compulsory education junior middle school physics teaching outline basically.
Observing, testing is the basic skills of research physics, junior middle school physics teaching will be based on observation experiment, it is to cultivating student's observation and experimental ability, realistic scientism, the student's interest that causes all have important effect, can make the student to the concrete clear and definite understanding of the true acquisition of physics by observing and testing, this understanding is to understand the necessary base of physical concept and rule.Lecture experiment and student experimenting are just providing observation of students and experimental conditions, but lecture experiment and student experimenting are subjected to the restriction of the time and space, because all multifactor influences such as demonstration instrument, classroom, personnel, can not each student can both clearly observe demonstrative process on the classroom, student experimenting is owing to funds, time relation, and the student also can not fully understand each experiment.
Demonstration of existing junior physics and experimental facilities can't be finished many experiments that junior school student institute should make because without specialized designs, many piece volumes, weight are all bigger, carry inconvenience, and function singleness, and the apparent that of its weak point is easily seen.
In order to remedy the deficiency of above two classes experiment, we have designed this cover junior middle school's Experiments of Machanics box, it will be as using for each student individual with the hall experiment, the teacher carries out lecture experiment in front, the student is observing the operation of taking action on one's own simultaneously, does not understand if do not finish on the class can experimentize after class and reach fully.Experiments of Machanics box in junior middle school's will play irreplaceable effect as the additional experimental apparatus of lecture experiment and student experimenting, and the condition that makes things convenient for of starting, beating one's brains is provided for the student.
The mechanics part that requires in the nine-year compulsory education junior middle school physics teaching outline has more than 20 experiment.Up to the present, these experiments are still demonstrated respectively with multiple element.Like this, generally speaking, desire to finish all these experiments, need still to find no the complete teaching aid that to finish all these experiments with a large amount of parts.
Experiments of Machanics box in junior middle school's has comprised the lecture experiment and the part student experimenting of mechanics in the full-time junior middle school physics teaching outline of nine-year compulsory education substantially.Because the experiment that comprises is many, for reducing cost, reduce number of elements, take the device of array configuration, under the prerequisite that does not influence experiment effect, using one more as far as possible.A whole set of instrument adopts the grafting array mode mostly, and each element has figure denote and packaging orientation, so that the student seeks, assembles, operates and arrangement.
Experiments of Machanics box in junior middle school's can be finished more than 20 experiments of mechanics part in the nine-year compulsory education junior middle school physics teaching outline.The higher element of designed several utilization rates is as follows:
1. dolly (Fig. 1)
What this dolly designed is the top plane that is, can make frictional experiment when like this dolly being turned over, and upturned dolly railway carriage is used to embed the counterweight piece, and all available dolly of many experiments is finished; As: use the object energy work done of the bead collision dolly demonstration motion of swing; Drawing the moving of car demonstration to lift high object with weight through fixed pulley can do work; Demonstrate that elastically-deformable object can do work etc. with the spring leaf bullet dolly of bending.
2. use termination (Fig. 2) more
How having three inserted terminals with the termination, it can finish a lot of experiments with pole cooperation.Its short-and-medium end is used to put the balance crossbeam, being positioned at two ends on the straight line plugs fixed pulley and can do the balance between two forces experiment, and wherein arbitrary end can be made the fulcrum of lever, hang up suspension ring and can be used for hanging fixed pulley, travelling block, pulley blocks, hangers such as single pendulum, the little pole of also can pegging graft on the pole is hung debugging to increase.How can closely cooperate with anti-rotation with termination and pole or ramuscule bar.
3. drum and keg (Fig. 3)
The drum purposes is more, and many experiments can both be finished by it.Drum bucket wall one side has a macropore, and opposite side has two apertures up and down, and bucket like this, when with the aperture jam-pack, is enclosed within film on the macropore mouth along having the spilling water smallmouth, and filled with water can be demonstrated the pressure of liquid to wall in the bucket; And during with the macropore jam-pack, increase apart from the increase with the degree of depth of the pressure of demonstration liquid internal by the water spray of two apertures.Fill a piece of paper sheet on the water cover in the keg, through the existence of operation demonstration atmospheric pressure.Drum, keg, weight and weight beam are in conjunction with demonstrating the condition of drifting along that the object that immerses in the liquid is subjected to buoyancy, Archimedes principle, object.
4. crossbeam (Fig. 4)
(1) crossbeam can be used as the balance crossbeam and does the balance experiment, and leveling nut and rider are arranged on it, and the hole that hangs pallet is arranged, and rider can be in the middle part of crossbeam move left and right.
(2) crossbeam can be made lever usefulness, the equilibrium condition of research lever.
5. pulley and pulley yoke (Fig. 5)
Pulley and pulley yoke be installed together be plugged into manyly, can finish the experiment of balance between two forces with on the termination; Travelling block is finished in pulley and pulley yoke and other elements combination decapacitation, and fixed pulley and pulley blocks experiment also can be finished the experiment of Maxwell's rolling pendulum.
6. counterweight piece and counterweight holder (Fig. 6)
The counterweight piece is made by iron and aluminium respectively, the counterweight piece is except that can be used as the counterweight use like this, can also not wait by the quality of relatively knowing from experience the equal volume different material of quality and profile, the volume of equal in quality different material do not wait, the quality and the volume of material of the same race are directly proportional.Counterweight piece and counterweight holder combination can be used as weight and use.
7. weight beam (Fig. 7)
Weight beam adopts the transparent cylinder shell, and the student can know and sees that inner structure can grasp using method by operation again.There is scale experiment box outside, and along scale direction level pulling dolly, the cognition level spurs the object acting with weight beam.When the experiment box is holded up,, know from experience vertically pulling object acting according to scale and weight beam registration with the vertical pull-up weight of weight beam.Can finish the synthetic and synthetic experiment of two power in the other direction of equidirectional two power on the same straight line in addition with two weight beams and rubber band.
8. pole and little pole (Fig. 8)
Pole as main element with how to cooperate with the termination, can constitute balance, this moment its lower end groove cooperate with balance scale.Thereby little pole with finish test of various pulleys and single pendulum test pole cooperation.
9. base (Fig. 9)
Thereby having, the surface of base finish an aperture and pole cooperation a day gentle pulley test.There is a scale its side, thereby finishes experiments such as merit.
10. other (Figure 10,11,12)
Other element comprises pallet, S type hook, rolling pendulum accessory, weight, weight, big or small plug, rider, inserted link, scale, teapoy, bead, sponge block, spring leaf, pointer etc.
The experiment that Experiments of Machanics box in junior middle school's of the present utility model can be finished is as follows:
1. the structure of balance and use
2. the quality of equal volume different material does not wait
The volume of equal in quality different material does not wait
The quality and the volume of material of the same race are directly proportional
To the pushing away of object, draw, carry, effect such as pressure, the motion state power that power changes object causes object deformation
4. plumb line
5. the structure of weight beam and using method
6. the application point difference of power, the effect difference
The directivity of power
7. synthesizing of equidirectional two power
Two power is synthetic in the other direction
8. the condition of balance between two forces
9. force of sliding friction heel pressure and surface appearance have relation
Rolling friction is littler than sliding friction
The method that increases and reduce to rub
10. the inertia of object
11. the pressure of solid is relevant with lifting surface area
12. liquid to device at the bottom of and the pressure of wall
The pressure of liquid internal increases with the increase of the degree of depth
13. linker
14. the existence of atmospheric pressure
15. the object in the immersion liquid is subjected to buoyancy
16. Archimedes principle
17. the condition of drifting along of object
18. vertically mention the object acting
The acting of level pulling object
19. the equilibrium condition of lever
20. fixed pulley, travelling block, pulley blocks
21. the work done of moving object energy, high object, the elastically-deformable object of act can do work
22. single pendulum, Maxwell's rolling pendulum
Fig. 1 to Figure 12 shows the element of Experiments of Machanics box in junior middle school's of the present utility model.
Figure 13 shows the structure and the using method of balance.
Figure 14 shows the structure and the using method of weight beam.
Figure 15 shows the application point difference of power, effect difference; The direction difference of power, effect are also different.
Figure 16 shows the synthetic of equidirectional two power.
Figure 17 shows synthesizing of two power in the other direction.
Figure 18 shows the condition of balance between two forces.
It is relevant with surface appearance that Figure 19 shows the force of sliding friction heel pressure.
Figure 20 show liquid to device at the bottom of and the pressure of wall and pressure increase with the increase of the degree of depth.
Figure 21 shows Communicating device.
Figure 22 shows the existence of atmospheric pressure.
Figure 23 shows the object that immerses in the liquid and is subjected to buoyancy.
Figure 24 shows Archimedes principle.
Figure 25 shows the condition of drifting along of object.
Figure 26 shows the acting of level pulling object.
Figure 27 shows and vertically mentions the object acting.
Figure 28 shows the equilibrium condition of lever.
Figure 29 shows fixed pulley.
Figure 30 shows travelling block.
Figure 31 shows pulley blocks.
The object that Figure 32 shows motion can do work.
Figure 33 shows the high object of act and can do work.
Figure 34 shows elastically-deformable object and can do work.
Figure 35 shows single pendulum.
Figure 36 shows Maxwell's rolling pendulum.
In each accompanying drawing, 1 is dolly, and 2 is to use the termination more, and 3 is pole, 4 is little pole, and 5 is scale, and 6 is weight beam, 7 is crossbeam (band leveling nut and screw mandrel), and 8 is rider, and 9 is pallet, 10 is drum, and 11 is large rubber plug, and 12 is little plug, 13 is film, and 14 is keg, and 15 is weight, 16 is plastic tube, and 17 is the counterweight piece, and 18 is the counterweight holder, 19 is pulley, and 20 is pulley yoke, and 21 is the rolling pendulum accessory, 22 is coarse cloth, and 23 are S type hook, and 24 is bead and the long fine rule of buckle, 25 is rubber band, and 26 is sponge block, and 27 is weight and line, 28 is pointer, and 29 is spring leaf, 30 cords for two ends band hook, 31 is inserted link, and 32 is base (porose on the susceptor surface cooperate with pole, and the one side has rule), 33 is the scraps of paper, and 34 is rule, and 35 is teapoy.
Principle of work and using method:
1. the structure of balance and using method
Element: pole 3, bar chi 5, use termination 6, crossbeam 7,8,2 pallets 9 of rider, pointer 28, counterweight piece 17, base 32 more.
Using method: said elements is found out, assembled, regulate the leveling nut on both sides by shown in Figure 13, make the balance balance, put weight in the on the left side pallet then, pallet adds an amount of counterweight piece on the right, and the adjusting rider makes balance balance again, the quality of reading weight thus.Use the sky at ordinary times, note knowing from experience the effect of leveling nut and rider.
2. the quality of equal volume different material does not wait
The volume of equal in quality different material does not wait
The quality and the volume of material of the same race are directly proportional
Element: counterweight piece 17
Method: the counterweight piece is made by two kinds of materials, examines the size and the quality of counterweight piece, knows from experience above-mentioned conclusion.
To the pushing away of object, draw, carry, effect such as pressure
Motion state, power that power changes object cause object deformation
Element: dolly 1, sponge block 26, rubber band 25, spring leaf 29.
Method: as Figure 15, push away moving of car, draw moving of car, mention dolly, use hand sponge block etc., comprehension is the effect of an object to another object; Make its motion with the static dolly of hand push, stop that with hand the dolly of motion makes cognition power such as it stops change the motion state of object; With the hand sponge block, draw cognition power such as rubber band, flexural spring sheet to cause object deformation.
4. plumb line
Element: the weight 27 of band line.
Method: hand takes rope one end to observe the weight direction, knows from experience the plumb line effect, and checks with this weight whether table leg is vertical.
5. the structure of weight beam and using method
Element: weight beam 2, weight 15.
Method: as Figure 14, examine weight beam, see what it all be made of, when pulling weight beam, with the indicating value of power size and weight beam what relation is arranged, what if did not pointer point to zero point when weight beam did not have dynamometry? (regulate the zeroing screw, make pointer point to zero point.）
6. the application point difference of power, the effect difference;
The directivity of power
Element: dolly 1.
Method: dolly is vertically erected, with the different parts (as Figure 15) of hand push vehicle body
How observe dolly moves; With different directions try hard to recommend dolly the time, observe the moving of car situation.
7.(1) equidirectional two power synthetic
(2) opposite direction two power is synthetic
Element: 2 weight beams 2, rubber band 25.
Method: (1) is as Figure 16, rubber band is enclosed within a fixed point of box, with two equidirectional A places, a certain position that simultaneously rubber band elongated of weight beam, write down the indicating value F1 and the F2 of two weight beams this moment, with a dynamometer rubber band is stretched to A place, position more then, write down the indicating value F3 of this dynamometer, relatively the relation between F3 and F1 and the F2.
(2) as Figure 17, with a dynamometer rubber band is stretched to C place, position, the drag hook with another dynamometer hangs on the drag hook of previous dynamometer then, and draws dynamometer with opposite direction, this moment, rubber band was stretched to B place, position, write down the indicating value F of two dynamometers
1And F
2, with a dynamometer rubber band being stretched to B place, position more then, this moment, the dynamometer indicating value was F
3, compare F
3With F
1And F
2Between relation.
8. the condition of balance between two forces
Element: use 19,2 pulley yokes 20 of 6,2 pulleys in termination, 17, two counterweight holders 18 of counterweight piece, the cord 30 of two ends band hook, pole 3, base 32 more.
Method: in Figure 18, how to be inserted into the pole upper end with the termination, pulley and pulley yoke are fitted together, straight-bar with pulley yoke is inserted into many with in two stomidiums of termination on same straight line respectively then, the cord two ends hang up the counterweight holder on pulley, observe phenomena when identical and different counterweight piece is put at two ends.
9.(1) the force of sliding friction heel pressure is relevant with surface appearance
(2) rolling friction is littler than sliding friction
Element: dolly 1, weight beam 2, coarse cloth 22, counterweight piece 17, rubber band 25
Method: (1) is as Figure 19, dolly is turned over, weight beam is hooked in dolly one end, when the counterweight piece of in railway carriage, putting different quality, the pulling dolly reads the indicating value of weight beam, coarse cloth is wrapped on the plane of railway carriage to be locked with rubber band, repeats above-mentioned experiment, read the indicating value of weight beam, the comparative experiments result.
(2) as Figure 19, the dolly wheel below the time, when the counterweight piece of putting equal in quality draws dolly, reads the indicating value of weight beam with dolly railway carriage plane below, relatively the size of rolling friction and sliding friction.
10. the inertia of object
Element: counterweight piece 17, dolly 1, the scraps of paper 33
Method: the scraps of paper are pressed in fold between several counterweight pieces together, when taking out the scraps of paper rapidly, observe phenomena; The counterweight piece is put on the dolly motion conditions of when pushing away moving of car rapidly and living the railway carriage of motion, observing the counterweight piece with stick shift.
11. the pressure of solid is relevant with lifting surface area
Element: sponge block 26, teapoy 35
Method: teapoy is stood on the sponge block, put several counterweight pieces on the desktop and teapoy is turned over, put same counterweight piece and observe experimental phenomena twice.
12.(1) liquid to device at the bottom of and the pressure of wall
(2) pressure of liquid internal increases with the increase of the degree of depth
Element: drum 10, large rubber plug 11, two little plugs 12, film 13, rubber band 25
Method: as Figure 20, two apertures on (1) drum put little plug, then film cover is locked with rubber band on macropore, and when in the drum during fills with water, observe phenomena; With macropore large rubber plug jam-pack, film cover is locked with rubber band on drum, then bucket is turned around, pull out the little plug on the top aperture, observe phenomena.In addition with the macropore of drum to be locked on the film cover and with rubber band, aperture is covered fills with water in the bucket, observe phenomena with plug.
(2) with the large rubber plug jam-pack of the macropore on the drum.When in the bucket during fills with water, observe the distance of ejection water from two apertures.
13. linker
Element: plastic tube 16, drum 10, large rubber plug 11, two little plugs 12.
Method: as Figure 21, with macropore on the drum and top aperture plug jam-pack, on thin plastic pipe one end cover aperture below, and up with the another port, after injecting water in the bucket, move up and down the upper port of plastic tube, observe the relation of plastic tube water level and bucket middle water level; With the plug jam-pack of the aperture in the drum, an end of thick plastic tube is enclosed within repeats said process, observe phenomena on the macropore.
14. the existence of atmospheric pressure
Element: keg 14, the scraps of paper 33
Method: as Figure 22, fills with water in the keg covers the scraps of paper 33, lives with hand, and bucket is turned around, unclamp hand after, observe phenomena.
15. the object in the immersion liquid is subjected to buoyancy
Element: drum 10, large rubber plug 11, two little plugs 12, weight 15, weight beam 2
Method: the stopple in the drum is tight as Figure 23 with large and small plug, inject suitable quantity of water, weight beam hangs up weight, reads indicating value W1, and weight is immersed in the water, reads indicating value W2 again, relatively W1 and W2.
16. Archimedes principle
Element: drum 10, large rubber plug 11, little plug 12, keg 14, weight 15, weight beam 2
Method: as Figure 24, big aperture with big or small plug jam-pack drum, fills with water, keg are placed under the gap, measure the suffered power W1 of weight with weight beam, then weight is immersed in the water, read the indicating value W2 of weight beam this moment, measure the gravity W3 of keg and water again with weight beam, and the gravity W4 that outwells keg behind the water, relatively W1-W2 and W3-W4 sum up rule.
17. the condition of drifting along of object
Element: drum 10, keg 14, large rubber plug 11, little plug 12, weight.
Method: as Figure 25, with the hole of plug jam-pack drum, annotate an amount of water, keg is placed on the water surface, observe phenomena is placed on weight in the keg observe phenomena then
18.(1) vertically mention the object acting, (2) level pulling object does work
Element: weight beam 2, dolly 1, counterweight piece 17, weight 15, base 32
Method: (1) is as Figure 26, to a side of rule 34 be arranged on the base over against the operator, dolly is placed with several counterweight pieces, draw moving of car with weight beam along rule direction level, the indicating value of record moving of car distance and weight beam, calculate the size of acting, change the quality of counterweight piece on the dolly and the distance of moving of car and repeat above-mentioned experiment.
(2) as Figure 27, base is vertically erected, make rule one side over against the operator, weight is vertically mentioned along the scale dimensional directions with weight beam, the indicating value of record weight beam and mention height is calculated the size of acting, changes different weights and change and mentions and highly repeat above-mentioned experiment.
19. the equilibrium condition of lever
Element: pole 3, use termination 6, crossbeam 7,17,2 counterweight holders 18 of counterweight piece, weight beam 2, base 32 more.
Method: as Figure 28, pole is inserted on the base in the hole, the termination point casings of using on strut ends more, circular hole in the middle of the crossbeam is through many with on the short end in termination, regulating the leveling nut makes crossbeam in the horizontal level balance, hang up the counterweight holder of different counterweight pieces on the crossbeam both sides, regulate the counterweight piece, make crossbeam at horizontal level balance again, measure and write down length L 1 and the L2 of the hanging position of counterweight holder to the crossbeam center with ruler, measure the whole gravity W1 and the W2 of two counterweight holders and counterweight piece thereof respectively with weight beam, relatively W1 * L1 and W2 * L2.
20. fixed pulley, travelling block, pulley blocks
Element: pole 3, ramuscule bar 4, how with cord 30, the base 32 of termination 6, weight beam 2,31,2 pulleys of inserted link 19, two pulley yokes 20, weight 15, two ends band hook.
Method: (1) fixed pulley
As Figure 29, inserted link is inserted many ends with the termination, and pulley and pulley yoke fit together, being hooked on the inserted link of pulley yoke, with cord on pulley, the end of restricting hangs up weight, and the other end hangs up weight beam, observes the direction of weight beam stay cord, and the indicating value F of record weight beam, use weight beam then, directly measure the gravity W of weight, relatively F and W.
(2) travelling block
As Figure 30, an end of rope is hung on the inserted link, the other end hung up weight beam after rope was walked around pulley, weight on the hook below the pulley, the reading F of record weight beam directly measures the gravity W of weight, relatively F and W then with weight beam.
(3) pulley blocks
After Figure 31 assembling, read the indicating value of weight beam, directly measure the gravity of weight then with weight beam, relatively twice reading.
21.(1) moving object can do work
(2) lifting high object, elastically-deformable object can do work
Element: the long fine rule 24 of dolly 1, bead and buckle, pulley 19, pulley yoke 20, pole 3, ramuscule bar 4, use termination 6, inserted link 31, counterweight piece 17, counterweight holder 18, spring leaf 29, base 32 more.
Method: (1) is as Figure 32, with the bead collision dolly of swing, observe phenomena
(2) as Figure 33, the buckle cord strides across fixed pulley one end and draws dolly, and the other end is hung the counterweight system, is pressed in A with pencil simultaneously and sentences anti-dolly and sling, and when the counterweight system falls, spurs moving of car.
As Figure 34, flick dolly with crooked spring leaf, the moving of car acting.
22.(1) single pendulum
Element: the long fine rule 24 of bead and buckle, pole 3, ramuscule bar 4, use termination 6, inserted link 31, base 32 more.
Method: as Figure 35, long line one end is tied up on the inserted link, observe the swing of bead
(2) Maxwell's rolling pendulum
Element: pulley 19, rolling pendulum accessory 21
Method: after Figure 36 assembling, carry line one end, unclamp the rolling pendulum of coiling, observe phenomena with hand.
Certainly, during practical application, related junior middle school's Experiments of Machanics box also can include only some main elements, and does not comprise the parts that some are available anywhere.These can make the volume and weight of described experiment box littler, make the experiment box more practical.
For ease of carrying, the part in these Experiments of Machanics box can be located in the box of packing into, thereby constitutes the Experiments of Machanics box.
Claims (4)
1, a kind of junior middle school's Experiments of Machanics box, it is characterized in that comprising dolly (1), many with termination (2), drum (10), keg (14), crossbeam (7), pulley (19), pulley yoke (20), counterweight piece (17), counterweight holder (18) and weight beam (6), and its element location is loaded in the portable box.
2, a kind of Experiments of Machanics box in junior middle school's as claimed in claim 1 is characterized in that how comprising two long ends in alignment and porose with vertical with the above-mentioned straight line short end of port with the termination; Have macropore, aperture and spilling water mouth on the drum simultaneously; Be useful on the groove that freely picks and places rider in the middle of the crossbeam; Pulley yoke one end is a hook, and the other end is a straight-bar; The counterweight piece is made with different materials respectively; Binding post or wing nut are adopted in the combination of the combination of pulley and pulley yoke, pulley and rolling pendulum accessory.
3, a kind of Experiments of Machanics box in junior middle school's as claimed in claim 1 is characterized in that also comprising dolly (1), uses termination (2) more, 6 poles (3), little pole (4), scale (5), weight beam (6) has the crossbeam (7) of leveling nut and screw mandrel, rider (8), pallet (9), drum (10), large rubber plug (11), little plug (12), film (13), keg (14), weight (15), plastic tube (16), counterweight piece (17), counterweight holder (18), pulley (19), pulley yoke (20), rolling pendulum accessory (21), coarse cloth (22), S type hook (23), bead (24), the long fine rule of buckle (24), rubber band (25), sponge block (26), weight and line (27), pointer (28), spring leaf (29), the cord (30) of two ends band hook, inserted link (31), base (32), the scraps of paper (33), rule (34), teapoy (35).
4, a kind of Experiments of Machanics box in junior middle school's as claimed in claim 1 or 2 is characterized in that each has corresponding label above the element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93219347 CN2173980Y (en) | 1993-07-24 | 1993-07-24 | Junior middle school dynamics experiment box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93219347 CN2173980Y (en) | 1993-07-24 | 1993-07-24 | Junior middle school dynamics experiment box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2173980Y true CN2173980Y (en) | 1994-08-10 |
Family
ID=33798755
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93219347 Expired - Fee Related CN2173980Y (en) | 1993-07-24 | 1993-07-24 | Junior middle school dynamics experiment box |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2173980Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102620805A (en) * | 2012-03-28 | 2012-08-01 | 吉林大学 | Anti-falling weight and weight support plate suitable for weight |
| CN107749219A (en) * | 2017-11-18 | 2018-03-02 | 容县容州镇中心学校 | A kind of easy-to-mount pulley experimental provision |
| CN108615441A (en) * | 2018-07-17 | 2018-10-02 | 陈忠煜 | A kind of physical and mechanical experiment integration instrument |
| CN109658785A (en) * | 2019-02-22 | 2019-04-19 | 鲁逸凡 | A kind of physics experiment mechanics apparatus for demonstrating |
-
1993
- 1993-07-24 CN CN 93219347 patent/CN2173980Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102620805A (en) * | 2012-03-28 | 2012-08-01 | 吉林大学 | Anti-falling weight and weight support plate suitable for weight |
| CN107749219A (en) * | 2017-11-18 | 2018-03-02 | 容县容州镇中心学校 | A kind of easy-to-mount pulley experimental provision |
| CN108615441A (en) * | 2018-07-17 | 2018-10-02 | 陈忠煜 | A kind of physical and mechanical experiment integration instrument |
| CN109658785A (en) * | 2019-02-22 | 2019-04-19 | 鲁逸凡 | A kind of physics experiment mechanics apparatus for demonstrating |
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