CN107088443A - Junior middle school student's laboratory table - Google Patents
Junior middle school student's laboratory table Download PDFInfo
- Publication number
- CN107088443A CN107088443A CN201710272766.9A CN201710272766A CN107088443A CN 107088443 A CN107088443 A CN 107088443A CN 201710272766 A CN201710272766 A CN 201710272766A CN 107088443 A CN107088443 A CN 107088443A
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- experiment
- fixed
- experiment porch
- lifting
- support base
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L9/00—Supporting devices; Holding devices
- B01L9/02—Laboratory benches or tables; Fittings therefor
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- Health & Medical Sciences (AREA)
- Clinical Laboratory Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
Junior middle school student's laboratory table, for promoting grasp and study of the student to physical knowledge.It includes support base and supporting table, supporting leg is provided with the bottom of support base, lift assembly is provided between supporting leg and support base, lift assembly includes crane, the feed screw nut being fixed on crane, the leading screw coordinated with feed screw nut, the driven gear being fixed on leading screw, the driving gear coordinated with driven gear engagement, the lifting worm gear of setting coaxial with driving gear, the elevating endless screw engaged with lifting worm gear, the rocking handle being fixed on elevating endless screw being fixed on supporting leg；First, second experiment porch is provided with supporting table, the lifting mechanism moved up and down in supporting table provided with driving lifting frame；Switching mechanism of first, second experiment porch of driving in vertical rotation in surface is provided with lifting frame；Friction measurement assembly is provided with the first experiment porch, provided with the unit that tests the speed on the second experiment porch.The laboratory table can promote study of the student to physics.
Description
Technical field
The present invention relates to student's teaching aid technical field, specifically a kind of junior middle school student's laboratory table.
Background technology
Physics is an experimental very strong subject, and in the learning process of junior physicses course, frictional force is one non-
Normal abstract concept.Calculating and understanding such as on frictional force, are exactly relatively difficult to the knowledge point grasped.
The content of the invention
It is an object of the invention to provide a kind of junior middle school student's laboratory table, for promoting grasp of the student to physical knowledge
And study.
The technical scheme adopted by the invention to solve the technical problem is that：Junior middle school student's laboratory table, it includes support base
And supporting table, the supporting table is arranged on the top of support base, in the bottom of the support base provided with four supporting legs, its feature
It is that lift assembly is provided between the supporting leg and support base, the lift assembly includes being fixed on the liter at the top of each supporting leg
Drop frame, leading screw, the fixation for being fixed on crane and being slided up and down with support base the feed screw nut being connected and feed screw nut cooperation
Driven gear on leading screw, the installation axle between four leading screws, it is fixed on the mounting shaft and with four driven gears point
The driving gear of cooperation, the lifting worm gear of setting coaxial with driving gear are not engaged, engage the lifting snail of cooperation with lifting worm gear
Bar, the rocking handle being fixed on the worm shaft of elevating endless screw；
The first experiment porch and the second experiment porch are provided with the supporting table, first, second experiment porch turns respectively
Lifting mechanism that is dynamic to be arranged on a lifting frame, being moved up and down in supporting table provided with driving lifting frame；Set on lifting frame
There is switching mechanism of first, second experiment porch of driving in vertical rotation in surface；
Friction measurement assembly is provided with first experiment porch, the friction measurement assembly includes being arranged on the
Some first on one experiment porch test the degree of roughness of tracks, the mat being arranged on the first experiment track and each mat not
The first sliding shoe and the first sliding shoe of pulling identical, be arranged on along rectilinear movement on mat do the translation that uniform rectilinear moves
Mechanism, the translation mechanism mainly includes translation motor, is arranged on the first runner of translation motor output end, is arranged on first turn
Take turns the weight beam between the first sliding shoe, connection the first sliding shoe and weight beam and connecting spring dynamometer and
The connecting rope of first runner；
Provided with the unit that tests the speed on second experiment porch, the unit that tests the speed includes being arranged on the second experiment porch
Second experiment track, be arranged on along line activities on the second experiment track the second sliding shoe, be arranged on the second experiment track
The transmitting pedestal in left side, the expelling plate being movably arranged on the inside of transmitting pedestal, the hair being arranged between expelling plate and transmitting pedestal
Projectile spring, the cushion pad being arranged on the right side of the second experiment track, left and right be arranged on first sensor on the second experiment track and
Second sensor, the dial plate being arranged on the second experiment porch, the vertical pivot for being arranged on dial plate center, the finger being arranged on vertical pivot
Pin, the timing motor for driving vertical axis, the timing motor, first sensor and second sensor connect with controller signals
Connect.
Further, the crane is " ┎ " shape structure, and reinforcement is provided with the inner side of crane.
Further, crossbeam is provided between the supporting leg, storage tank is provided with the crossbeam, on the storage tank
Provided with drawer.
Further, the lifting mechanism include be fixed in supporting table inner chamber cam motor, be fixed on cam motor
Cam on output shaft, the connecting rod being arranged between cam peak and lifting frame, are fixed with hollow in the bottom of lifting frame
Motion bar, provided with the fix bar being slidably connected with motion bar in the inner chamber of supporting table.
Further, the switching mechanism include be fixed on lifting frame upset motor, be fixed on upset motor output
The worm gear that worm screw and worm engaging on axle coordinate and be fixed on the first experiment porch or the second experiment porch.
Further, the translation mechanism also include be rotatably installed on the first experiment porch the second runner, be arranged on
Bridge between first runner and the second runner, the tension pulley support being arranged on the inside of bridge, be arranged on tension pulley support with across
The contacts-side-down of tensioning spring between beam, the tensioning wheel being rotatably installed on tension pulley support, connecting rope and tensioning wheel and with
The upper contact of second runner.
Further, SDeflector is equipped with the side of first, second sliding shoe, the SDeflector and first, second is in fact
Test the inwall contact of track.
Further, ball is provided with the outer wall of the expelling plate, the ball relative transmission plate does 360 and all rotated,
Chute is provided with the inwall of transmitting pedestal, a part for ball is placed in chute.
The beneficial effects of the invention are as follows：Junior middle school student's laboratory table that the present invention is provided, the setting of lift assembly can be real
Now to the lifting of supporting table；The setting of friction measurement assembly can realize the measurement to frictional force on first experiment porch, promote
Enter study of the student to frictional force；The setting of unit of being tested the speed on second experiment porch can realize the measurement to average speed, promote
Enter understanding of the student to average speed.
Brief description of the drawings
Fig. 1 is schematic diagram of the invention；
Fig. 2 is the schematic diagram of lift assembly；
Fig. 3 is the part-structure schematic diagram of lift assembly；
Fig. 4 is A in Fig. 1 to local direction view；
Fig. 5 is the schematic diagram of the first experiment porch；
Fig. 6 is the schematic diagram of friction measurement assembly；
Fig. 7 is the schematic diagram of the first experiment track；
Fig. 8 is partial enlarged drawing at the B in Fig. 6；
Fig. 9 is partial enlarged drawing at the C in Fig. 6；
Figure 10 is the position view of tensioning wheel；
Figure 11 is the schematic diagram of tension pulley support；
Figure 12 is the schematic diagram of lifting mechanism；
Figure 13 is partial enlarged drawing at the D in Figure 12；
Figure 14 is the schematic diagram of the second experiment porch；
Figure 15 is the schematic diagram of unit of testing the speed；
In figure：1 support base, 11 supporting legs, 12 supporting tables, 13 crossbeams, 14 storage tanks, 15 drawers, 16 installing plates；
2 cranes, 20 bearings, 21 feed screw nuts, 22 reinforcements, 23 leading screws, 24 driven gears, 25 lifting worm gears, 26 liters
Worm screw, 27 installation axles, 28 driving gears, 29 rocking handles drop；
3 first experiment porch, 30 rotating shafts, 31 first experiment tracks, 32 mats, 33 translation motors, 34 first runners, 341
Second runner, 35 first sliding shoes, 351 otic placodes, 352 Weight boxes, 353 SDeflectors, 36 tensioning wheels, 361 tension pulley supports, 37 across
Beam, 371 tensioning springs, 38 connecting ropes, 39 weight beams；
4 lifting frames, 41 reinforcements, 42 motion bars, 43 fix bars, 44 supporting plates, 441 supporting plate journal stirrups, 45 cams, 451 connecting rods,
46 cam motors, 461 motor support frames, 47 upset worm gears, 471 upset worm screws, 472 upset motors；
5 second experiment porch, 51 second experiment tracks, 52 transmitting pedestals, 521 transmitting springs, 522 expelling plates, 53 second
Sliding shoe, 541 first sensors, 542 second sensors, 55 cushion pads, 56 dial plates, 561 vertical pivots, 562 pointers.
Embodiment
As shown in Fig. 1 to Figure 15, the invention mainly comprises support base 1, lift assembly, supporting table 12, the first experiment porch,
Friction measurement assembly, the second experiment porch and the unit that tests the speed, each several part is described in detail below in conjunction with the accompanying drawings.
As shown in figure 1, support base 1 is the support member of cuboid, and it is hollow structure, for installing other parts.
In the bottom of support base provided with four supporting legs 11, supporting leg is used to realize the support to support base.It is whole real by the setting of supporting leg
That tests that platform can consolidate is placed in indoor environment.To realize the lifting to support base, provided with liter between support base and supporting leg
Assembly drops.
As shown in Fig. 2 lift assembly mainly includes crane 2, feed screw nut 21, leading screw 23, driven gear 24, lifting snail
Wheel 25, elevating endless screw 26, installation axle 27, driving gear 28 and rocking handle 29, are fixed with crane 2 at the top of each supporting leg, rise
Drop frame is " ┎ " shape structure, and the bottom of crane is fixed on the top of supporting leg, be fixed with the top of crane with support base
The feed screw nut 21 of lower slider connection, four leading screws 23, four silks are rotatablely equipped with the inner chamber of support base by bearing 20
Thick stick is located on four square summits respectively.Leading screw is engaged with corresponding feed screw nut to be coordinated, as shown in figure 3, in each leading screw
On be fixed with driven gear 24, some leading screws surround space center be provided with installation axle 27, installation axle is rotated also by bearing
In support base.Driving gear 28 is fixed with the mounting shaft, and driving gear engages cooperation respectively with four driven gears.
For the rotation of drive installation axle, the lifting worm gear 25 below driving gear is fixed with the mounting shaft, lifting worm gear is with turning
The dynamic elevating endless screw 26 in support base engages.It is fixed with the worm shaft of elevating endless screw and is placed in shaking on the outside of support base
Handle 29, shakes rocking handle, to drive the rotation of elevating endless screw, and then drives rotation, the rotation of driving gear of lifting worm gear, then
Rotation, the rotation of leading screw of driven gear are driven, moving up and down for feed screw nut is finally realized.Because supporting leg is placed on ground
On, when supporting leg relative support seat is moved up, support base confronting legs are moved down；When supporting leg relative support seat is moved down,
Support base confronting legs are moved up.For ease of the installation to installation axle, leading screw, installing plate is provided with the inner chamber of support base
16, bearing is set on a mounting board, and the bottom of installation axle and leading screw is each attached in the inner ring of bearing.To ensure the knot of crane
Structure intensity, reinforcement 22 is provided with the inner side of crane.
To realize function of containing articles, between the legs provided with crossbeam 13, provided with two storage tanks 14 on crossbeam, in storage tank
It is provided with drawer 15.
Supporting table 12 is provided with the top of support base, the first experiment porch 3 and the second experiment porch are provided with supporting table
5.As shown in figure 4, being provided with friction measurement assembly on the first experiment porch.
Friction measurement assembly：
As shown in Figure 5, Figure 6, friction measurement assembly includes the first experiment track 31, mat 32, translation motor 33, first
Runner 34, the second runner 341, the first sliding shoe 35, Weight box 352, tensioning wheel 36, bridge 37 and connecting rope 38, such as Fig. 7 institutes
Show, the first experiment track 31 is multigroup at the top of the first experiment porch to be arranged on, every group includes two track plates be arrangeding in parallel,
The mat surface roughness being provided between two track plates in mat 32, the experiment track of each group first is different.In the first experiment
The first sliding shoe 35 is provided with track, the bottom of the first sliding shoe is contacted with mat, as shown in figure 8, the two of the first sliding shoe
Side is respectively equipped with SDeflector 353, and the major part of SDeflector is placed in the first sliding shoe and can do 360 degree with respect to the first sliding shoe
Rotate, SDeflector and the first experiment rail contact, the setting of SDeflector can ensure the first sliding shoe in the first experiment track
Move along a straight line.Otic placode 351 is provided with the top of the first sliding shoe, multiple Weight boxes are additionally provided with the top of the first sliding shoe
352.The right side of track is tested at each group first provided with a translation motor 33, as shown in figure 9, in the output end of translation motor
The first runner 34 is fixed with, as shown in Figure 10, the second runner 341 is rotatablely equipped with the first experiment porch, first, second
Inverted U-shaped bridge 37 is provided between runner, provided with the tension pulley support 361 being slidably connected with bridge on the inside of bridge, such as Figure 11
Shown, tension pulley support is inverted U-shaped.Tensioning wheel 36, tensioning wheel and first, second are rotatablely equipped with tension pulley support
Runner on three summits of triangle, is provided with tensioning spring 371 between tension pulley support and bridge respectively.Otic placode with
Connecting rope 38 is provided between first runner, one end of connecting rope is tied up on otic placode, and the other end of connecting rope is fixed on the first runner
Outer wall on, and connecting rope and tensioning wheel and the second runner wall contacts.Connecting rope is straightened in the presence of tensioning spring.
Translation motor, the first runner, the second runner, tensioning wheel and connecting rope constitute translation mechanism, in connecting rope also
Provided with weight beam 39.Translation mechanism can pull the first sliding shoe at the uniform velocity to move right when working, and can now read bullet
Reading on spring dynamometer, the reading is the frictional force between the first sliding shoe and mat.According to the calculation formula f=of frictional force
μ N, can add counterweight, the normal pressure between the first sliding shoe of increase and mat, to verify the size of frictional force in Weight box
It is relevant with normal pressure.The degree of roughness of different mats is different, and then the friction factor μ of different mats is different, and then can draw
The frictional force conclusion relevant with friction factor μ.Same first experiment track in, keep the first sliding shoe on counterweight quantity not
Become, it is also possible that translation motor exports different rotating speeds, the reading watched again on weight beam, and then study frictional force
Whether relation is had with the speed of object.Often carry out once testing, be by the left side of the first experiment track by the first sliding shoe
Can.
When without using the experimental bench, the first experiment porch can be reversed 180 degree.As shown in figure 12, support base with
Lifting mechanism is provided between first experiment porch.Lifting mechanism includes lifting frame 4, motion bar 42, fix bar 43, supporting plate 44, convex
Wheel 45, connecting rod 451, cam motor 46, upset worm gear 47, upset worm screw 471 and upset motor 472, lifting frame is U-shaped structure,
Rotating shaft 30 is respectively equipped with the two ends of the first experiment porch, axis of rotation is arranged on lifting frame.Provided with reinforcement on lifting frame
Muscle 41, hollow motion bar 42 is fixed with the bottom of lifting frame, and fix bar 43 is provided with the inner chamber of support base, fix bar
Top is placed in the inner chamber of motion bar and both are slidably connected.Supporting plate 44 is fixed with the bottom of lifting frame, in support base
Motor support frame 461 is fixed with chamber, cam motor 46 is fixed with motor support frame, is fixed in the output end of cam motor
There is cam 45, supporting plate journal stirrup 441 is fixed with the bottom of supporting plate, connecting rod 451 is provided between supporting plate journal stirrup and cam.Cam electricity
When machine works, lifting frame moving up and down together with the first experiment porch can be driven.As shown in figure 13, wherein in a rotating shaft
Upset worm gear 47 is fixed with, upset motor 472 is fixed with lifting frame, upset worm screw is fixed with the output end of upset motor
471, upset worm screw engages with upset worm gear, and upset motor, upset worm screw and upset worm gear constitute switching mechanism, switching mechanism
The first experiment porch can be driven during work in vertical rotation in surface, and switching mechanism often acts the first experiment porch upset
180 degree.After the upper table of first experiment porch is face-down, friction measurement assembly is just hidden in support base inner chamber.Need to hide
During the upper surface of the first experiment porch, driving cam motor action first so that lifting frame is moved down, when lifting frame be displaced downwardly to it is minimum
After point, driving upset motor action so that the first experiment porch overturns 180 degree, finally drives lifting frame to reset.
The second experiment porch, the square hole that the second experiment porch is placed at the top of supporting table are provided with the front side of the first experiment porch
In.Provided with the unit that tests the speed on the second experiment porch.
Test the speed unit：
As shown in figure 14, the unit that tests the speed includes the second experiment track 51, transmitting pedestal 52, transmitting spring 521, second and slided
Block 53, first sensor 541, second sensor 542, dial plate 56, vertical pivot 561 and pointer 562, the second experiment track include parallel
Two track plates set, the second sliding shoe 53 is provided between two track plates, as shown in figure 15, is set in the both sides of the second sliding shoe
There is the SDeflector contacted with track plates, the second sliding shoe edge rectilinear movement on the second experiment track in the presence of SDeflector.
The transmitting pedestal 52 of U-shaped is provided with the left side of the second experiment track, launches the opening end and the second experiment rail contact of pedestal,
Launch and expelling plate 522 is provided with the inside of pedestal, provided with transmitting spring 521, it is necessary to which second is slided between expelling plate and transmitting pedestal
When motion block is released, the second sliding shoe is contacted with expelling plate and compressed transmissions spring, then unclamp the second sliding shoe.For reality
Now to the tachometric survey of the second sliding shoe, first sensor 541 and second sensor 542 are provided with the second experiment track, the
The distance between one sensor and second sensor are L, and L values are constant.Cushion pad 55 is provided with the end of the second experiment track,
To prevent the second sliding shoe from going out the second experiment track.Cushion pad can be the rubber parts full of gas, or sponge member.
Dial plate 56 is additionally provided with second experiment porch, time scale line is provided with dial plate, vertical pivot 561 is provided with the center of dial plate,
Pointer 562 is fixed with vertical pivot, the timing motor provided with driving vertical axis on the second experiment porch, timing motor is with controlling
Device signal is connected, and controller is connected with first, second sensor signal, when the second sliding shoe passes through first sensor, and first passes
Sensor sends signal to controller, and controller control timing motor is acted, and now vertical axis, starts timing；The second sliding shoe
During by second sensor, second sensor sends signal to controller, and controller control timing motor stopping action now being erected
Axle stops operating, and timing terminates.Now the time on dial plate shown in pointer is that the second sliding shoe passes through first, second sensor
Time t, just can now measure the average speed V of the second sliding shoe.The decrement for launching spring is bigger, the second sliding shoe
Initial velocity is bigger, and the average speed value V now measured is bigger.It can also show that the deformation of spring is bigger herein, spring
Elastic force just it is smaller.
When without using the experimental bench, the second experiment porch can also be reversed 180 degree.Second experiment porch and supporting table
Between also be provided with lifting mechanism, it is lifting mechanism structure between the lifting mechanism and the first experiment porch and supporting table, worked
Journey is identical.
Claims (8)
1. junior middle school student's laboratory table, it includes support base and supporting table, and the supporting table is arranged on the top of support base, in institute
The bottom of support base is stated provided with four supporting legs, it is characterized in that, lift assembly, the liter are provided between the supporting leg and support base
Drop assembly includes being fixed on crane at the top of each supporting leg, is fixed on crane and is slided up and down with support base the silk being connected
Leading screw that thick stick nut and feed screw nut coordinate, the driven gear being fixed on leading screw, the installation axle between four leading screws,
It is fixed on the mounting shaft and with four driven gears engage respectively the driving gear of cooperation, setting coaxial with driving gear lifting
Worm gear, the elevating endless screw for engaging cooperation with lifting worm gear, the rocking handle being fixed on the worm shaft of elevating endless screw；
The first experiment porch and the second experiment porch are provided with the supporting table, first, second experiment porch rotates peace respectively
On a lifting frame, the lifting mechanism moved up and down in supporting table provided with driving lifting frame；Provided with drive on lifting frame
Switching mechanism of dynamic first, second experiment porch in vertical rotation in surface；
Friction measurement assembly is provided with first experiment porch, the friction measurement assembly includes being arranged on first in fact
The degree of roughness of some first experiments tracks tested on platform, the mat that is arranged on the first experiment track and each mat not phase
The first sliding shoe and the first sliding shoe of pulling same, be arranged on along rectilinear movement on mat make the translation machine that uniform rectilinear moves
Structure, the translation mechanism mainly includes translation motor, is arranged on the first runner of translation motor output end, is arranged on the first runner
Weight beam between the first sliding shoe, it is connected the first sliding shoe and weight beam and connecting spring dynamometer and
The connecting rope of one runner；
Provided with testing the speed unit on second experiment porch, the unit that tests the speed includes being arranged on the on the second experiment porch
Two experiment tracks, the second sliding shoe being arranged on along line activities on the second experiment track, it is arranged on the left of the second experiment track
Transmitting pedestal, be movably arranged on transmitting pedestal on the inside of expelling plate, be arranged on expelling plate and transmitting pedestal between transmitting bullet
Spring, the cushion pad being arranged on the right side of the second experiment track, left and right are arranged on first sensor and second on the second experiment track
Sensor, the dial plate being arranged on the second experiment porch, the vertical pivot for being arranged on dial plate center, the pointer being arranged on vertical pivot, drive
The timing motor of dynamic vertical axis, the timing motor, first sensor and second sensor are connected with controller signals.
2. junior middle school student's laboratory table according to claim 1, it is characterized in that, the crane is " ┎ " shape structure,
The inner side of crane is provided with reinforcement.
3. junior middle school student's laboratory table according to claim 1, it is characterized in that, crossbeam is provided between the supporting leg,
The crossbeam is provided with storage tank, and drawer is provided with the storage tank.
4. junior middle school student's laboratory table according to claim 1, it is characterized in that, the lifting mechanism includes being fixed on support
Cam motor in platform inner chamber, the cam being fixed on cam motor output shaft, it is arranged between cam peak and lifting frame
Connecting rod, hollow motion bar is fixed with the bottom of lifting frame, provided with being slidably connected with motion bar in the inner chamber of supporting table
Fix bar.
5. junior middle school student's laboratory table according to claim 1, it is characterized in that, the switching mechanism includes being fixed on lifting
Upset motor on frame, the worm screw being fixed on upset motor output shaft, coordinate with worm engaging and be fixed on the first experiment and put down
Worm gear on platform or the second experiment porch.
6. junior middle school student's laboratory table according to claim 1, it is characterized in that, the translation mechanism also includes rotational installation
The second runner on the first experiment porch, the bridge being arranged between the first runner and the second runner, it is arranged on the inside of bridge
Tension pulley support, be arranged between tension pulley support and bridge tensioning spring, be rotatably installed on tension pulley support
The contacts-side-down of bearing up pulley, connecting rope and tensioning wheel and with the upper contact of the second runner.
7. junior middle school student's laboratory table according to claim 1, it is characterized in that, it is equal in the side of first, second sliding shoe
Provided with SDeflector, the SDeflector is contacted with the inwall of first, second experiment track.
8. junior middle school student's laboratory table according to claim 1, it is characterized in that, provided with rolling on the outer wall of the expelling plate
Pearl, the ball relative transmission plate does 360 and all rotated, and chute is provided with the inwall of transmitting pedestal, and a part for ball is put
In chute.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710272766.9A CN107088443A (en) | 2017-04-24 | 2017-04-24 | Junior middle school student's laboratory table |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710272766.9A CN107088443A (en) | 2017-04-24 | 2017-04-24 | Junior middle school student's laboratory table |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107088443A true CN107088443A (en) | 2017-08-25 |
Family
ID=59638291
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710272766.9A Pending CN107088443A (en) | 2017-04-24 | 2017-04-24 | Junior middle school student's laboratory table |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107088443A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109718889A (en) * | 2019-01-21 | 2019-05-07 | 山东交通学院 | A kind of electrical engineering and automotization comprehensive experimental device |
| CN112570056A (en) * | 2020-11-17 | 2021-03-30 | 衡阳师范学院 | Lifting platform for college physics experiments |
| CN112956799A (en) * | 2021-02-24 | 2021-06-15 | 亳州学院 | Device for preventing student from network addiction |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201377004Y (en) * | 2009-03-10 | 2010-01-06 | 睿明科技股份有限公司 | Fetching mechanism for hard substrates |
| CN204926621U (en) * | 2015-08-08 | 2015-12-30 | 傅小蕥 | Even presentation device that tests speed that changes speed of object |
| CN205541571U (en) * | 2016-01-28 | 2016-08-31 | 任新年 | Intelligence frictional force demonstration ware |
| CN205570379U (en) * | 2016-01-18 | 2016-09-14 | 冯福林 | Instrument elevating gear is used in chemistry experiment teaching |
-
2017
- 2017-04-24 CN CN201710272766.9A patent/CN107088443A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201377004Y (en) * | 2009-03-10 | 2010-01-06 | 睿明科技股份有限公司 | Fetching mechanism for hard substrates |
| CN204926621U (en) * | 2015-08-08 | 2015-12-30 | 傅小蕥 | Even presentation device that tests speed that changes speed of object |
| CN205570379U (en) * | 2016-01-18 | 2016-09-14 | 冯福林 | Instrument elevating gear is used in chemistry experiment teaching |
| CN205541571U (en) * | 2016-01-28 | 2016-08-31 | 任新年 | Intelligence frictional force demonstration ware |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109718889A (en) * | 2019-01-21 | 2019-05-07 | 山东交通学院 | A kind of electrical engineering and automotization comprehensive experimental device |
| CN112570056A (en) * | 2020-11-17 | 2021-03-30 | 衡阳师范学院 | Lifting platform for college physics experiments |
| CN112956799A (en) * | 2021-02-24 | 2021-06-15 | 亳州学院 | Device for preventing student from network addiction |
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Application publication date: 20170825 |