CN206657539U - A kind of variable element circle fan annular demonstration and arc length area measuring device - Google Patents
A kind of variable element circle fan annular demonstration and arc length area measuring device Download PDFInfo
- Publication number
- CN206657539U CN206657539U CN201620963524.5U CN201620963524U CN206657539U CN 206657539 U CN206657539 U CN 206657539U CN 201620963524 U CN201620963524 U CN 201620963524U CN 206657539 U CN206657539 U CN 206657539U
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- bracket
- disk
- gate
- rectangular
- radial link
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Abstract
The utility model discloses a kind of variable element to justify the demonstration of fan annular and arc length area measuring device,Including disk bracket,Fan-shaped disk cover,Protect gate,Radial link,Elastic slat,Rectangular bracket and vernier ruler,The protection gate and radial link are respectively arranged on disk bracket,And protection gate and radial link are perpendicular,Elastic slat is placed on disk bracket in arc-shaped,And the both ends of elastic slat are connected with protection gate and radial link respectively,Fan-shaped disk cover is covered on elastic slat,Rectangular bracket is on disk bracket,And adjacent two right-angle sides of rectangular bracket mutually touch with protection gate and radial link respectively,Vernier ruler is on rectangular bracket,Radial link push-and-pull elastic slat carries out the conversion of circular arc and straight line between disk bracket and rectangular bracket,Then realize that circle fan annular arrives triangle or trapezoidal demonstration and area measurement.The utility model is simple to operate, and strong applicability, cost is cheap, easy to carry.
Description
Technical field：
It the utility model is related to a kind of variable element circle fan annular demonstration and arc length area measuring device.
Background technology：
The knowledge of the figures such as the circle that is made up of circular arc, sector, fan annular, arch, be that middle and primary schools must be learned by is important interior
One of hold, and figure most commonly used in all trades and professions and daily life, due to circular arc unlike straight line directly perceived, Jiao Shijiao
Lack suitable teaching aid class hour, more difficult such issues that performance, student is not readily understood in learning process, asks arc length and area
Formula memory gets up easily to obscure, and teacher is badly in need of some, and more the teaching aid of science or survey tool carry out aided education, and student also needs
The apparatus for wanting some to be easy to study, engineers and technicians need convenient survey tool.
In order to solve the above problems, also there is the device in terms of minority is related to circular sector, e.g., number of patent application in the nearly stage
To give " a kind of circle area demonstrator " in 201110273519.3 document, it is according to the sector introduced on Mathematics Teaching Material
Method is cut off, the big secter pat arc surface for having patch such as odd number is divided into and is adhered to up and down on two edge strips, forms one
The disk of completion, the sector of two semicircles is separated and corresponds to intersection, formed the approximate rectangular of curved side, pass through rectangular surfaces
The product representation area of a circle, round area formula is obtained, because the block number division of sector is less, the side of rectangle is not straight line, demonstration effect
Fruit is inaccurate, can not particularly solve the relevant issues of any fan annular；Number of patent application is 201510189586.5 document
In give " area of a circle size illusion demonstrator ", can clearly demonstrate and be advantageous to illusion resolution the area of a circle size illusion demonstration
Instrument, it is impossible to solve the problems such as arc length and graphics area being made up of circular arc.
Therefore, it is necessory to be improved to prior art to solve the deficiency of prior art.
The content of the invention：
The utility model is to provide a kind of variable element circle fan annular in order to solve the above-mentioned problems of the prior art and drill
Show and arc length area measuring device.
There is technical scheme used by the utility model：A kind of variable element circle fan annular demonstration and arc length area measurement dress
Put, including disk bracket, fan-shaped disk cover, protection gate, radial link, elastic slat, rectangular bracket and vernier ruler, it is described
Protection gate and radial link are respectively arranged on disk bracket, and protect gate and radial link perpendicular, and elastic slat is in circle
Arcuation is placed on disk bracket, and the both ends of elastic slat are connected with protection gate and radial link respectively, and fan-shaped disk cover lid is set
In on elastic slat, rectangular bracket on disk bracket, and adjacent two right-angle sides of rectangular bracket respectively with protection gate and
Radial link mutually touches, and vernier ruler is on rectangular bracket, and radial link push-and-pull elastic slat is in disk bracket and rectangle support
The conversion of circular arc and straight line is carried out between frame, then realizes that circle fan annular arrives triangle or trapezoidal demonstration and area measurement.
Further, the disk bracket includes disk, pulley bracket, fixed pulley, vertical shaft, spoke, footpath way roller, fixture
Support and spring clip, the pulley bracket are fixed on disk, and some fixed pulleys are rotationally connected with along the circumferencial direction of disk
On disk, and fixed pulley is located at the inner side of pulley bracket, and vertical shaft is placed at the center of disk, seven circumference sides of the spoke along disk
To between pulley bracket and vertical shaft, fixture mount is fixed on a spoke, and spring clip is fixed in fixture mount, and six
Root footpath way roller, which rotates, to be located at described in the other six roots of sensation on spoke；The protection gate and radial link are respectively placed in orthogonal
At two spoke, elastic slat is placed on tangential roller in arc-shaped is overlapping, and fan-shaped disk cover is covered in the top of elastic slat.
Further, the fan-shaped disk cover includes a transparent cover plate, and vertical shaft hole, transparency cover are provided with the center of transparent cover plate
Plate is provided with arc groove, is provided with circular arc scale along the inward flange of arc groove, two sides of transparent cover plate are provided with slide-rule dial.
Further, the protection gate includes rectangular base plate, door frame, the 3rd gate and door lock ditch, and the door frame is consolidated
Due in rectangular base plate, door frame is provided with rectangular-shaped door opening, and the 3rd gate slot is provided with above door frame and at face door opening, the
Three gates are provided with door lock ditch in the 3rd gate slot in rectangular base plate and immediately below the 3rd gate.
Further, the radial link includes rectangle connecting rod, gap gate, push rod, the 4th roller, handle and set
Ring, the rectangle connecting rod are provided with the 4th gate slot, and for gap gate in the 4th gate slot, push rod is fixedly connected on rectangle
On connecting rod, and the lower end of push rod is connected through rectangle connecting rod and with the 4th roller, and handle is fixed on the top of push rod, and the collar is fixed
In in the side wall of rectangle connecting rod.
Further, the elastic slat includes rectangular strip body, draw back plate, is oriented to leg, indicator lamp and goalpost, institute
Draw back plate, guiding leg, indicator lamp and goalpost is stated to be all connected on rectangular strip body.
Further, the rectangular bracket includes rectangular substrate, left slideway, right slideway, front vertical plate and back vertical plate, the left side
Slideway, right slideway, front vertical plate and back vertical plate are correspondingly arranged on four sides of rectangular substrate respectively, are set in rectangular substrate
There are some straight line grooves, passageway is provided with left slideway bottom, the 6th pin hole is provided with the edge of rectangular substrate.
Further, the vernier ruler includes ruler plate, vernier, left slider and right sliding block, left slider and right sliding block
It is respectively fixedly connected with the both sides of ruler plate, vernier is on ruler plate；T-shaped groove is equipped with left slider and right sliding block.
The utility model has the advantages that：
The utility model is simple to operate, as long as promoting handle just to complete demonstration and numerical measuring after being completed；It is applicable
Property is strong：Selection different radii and central angle can complete the functions such as the equivalance demonstration, arc length measurement and area letter calculation of a variety of figures；Into
This is cheap, easy to carry, can be placed in a writing case.
Brief description of the drawings：
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the structural representation of disk bracket in the utility model.
Fig. 3 is the structural representation of fan-shaped disk cover in the utility model.
Fig. 4 is the structural representation that gate is protected in the utility model.
Fig. 5 is the structural representation of radial link in the utility model.
Fig. 6 is the structural representation of elastic slat in the utility model.
Fig. 7 is the structural representation of rectangular bracket in the utility model.
Fig. 8 is the structural representation of vernier ruler in the utility model.
Embodiment：
The utility model is further described below in conjunction with the accompanying drawings.
Such as Fig. 1, a kind of variable element circle fan annular demonstration of the utility model and arc length area measuring device, including disk bracket
1st, fan-shaped disk cover 2, protection gate 3, radial link 4, elastic slat 5, rectangular bracket 6 and vernier ruler 7, protect the He of gate 3
Radial link 4 is respectively arranged on disk bracket 1, and protection gate 3 and radial link 4 are perpendicular, and elastic slat 5 is put in arc-shaped
In on disk bracket 1, and the both ends of elastic slat 5 are connected with protection gate 3 and radial link 4 respectively, and fan-shaped disk cover 2 is covered on
On elastic slat 5, rectangular bracket 6 is on the disk bracket 1, and adjacent two right-angle sides of rectangular bracket 6 are respectively with protecting gate 3
Mutually touched with radial link 4, two vernier rulers 7 are on rectangular bracket 6, and the push-and-pull elastic slat 5 of radial link 4 is in disk support
The conversion of circular arc and straight line is carried out between frame 1 and rectangular bracket 6, then realize circle fan annular to triangle or trapezoidal demonstration and
Area measurement.
Such as Fig. 2, the disk bracket 1 in the utility model includes disk 11, and upper in disk 11 is provided with pulley bracket 12,
The inner side of pulley bracket 12 is equipped with fixed pulley 13, cylinder vertical shaft 14 is provided with the center of disk 11, in vertical shaft 14 and pulley bracket 12
Between be provided with seven spokes 15, fix a fixture mount 19 outside a spoke 15, in fixture mount 19 be provided with it is multiple
Spring clip 110.To be fixed with the spoke 15 of fixture mount 19 as first spoke, then in the direction of the clock remaining second
Tangential roller 16 is equipped with to the 7th spoke 15.Lower facade 17 is provided with below the outer edge of disk 11, the of disk
The first pin of pin 18 is provided with one quadrant, second in disk is provided with the first fixing hole 111 to fourth quadrant edge.Protect gate
3 are respectively placed at first on disk bracket 1, seven spoke 15 with radial link 4, and elastic slat 5 is placed in arc-shaped is overlapping
On tangential roller 16, fan-shaped disk cover 2 is covered in the top of elastic slat 5, rectangular bracket 6 be fixed on disk bracket 1 first as
It is at limit and adjacent with radial link 4 with protection gate 3.Vernier ruler 7 is placed on rectangular bracket 6.The push-and-pull elastic plate of radial link 4
Bar 5 can carry out the conversion of circular arc and straight line between disk bracket 1 and rectangular bracket 6, be achieved in circle fan annular and arrive triangle
Or trapezoidal demonstration and area measurement function.
Such as Fig. 3, fan-shaped disk cover 2 includes transparent cover plate 21 and alien invasion 22, is provided with the center of arc of transparent cover plate 21 vertical
Axis hole 24, arc groove 23 is provided with the arc edge of transparent cover plate 21, circular arc scale 25 is provided with along the inward flange of arc groove 23,
Slide-rule dial 26 is equipped with two straight flanges of transparent cover plate 21, the second fixing hole 27 is provided with the outward flange of arc groove 23.It is fan-shaped
Disk cover 2 by the vertical shaft hole 24 on transparent cover plate 21 and the 27 corresponding vertical shaft 14 being fixed on disk bracket 1 of the second fixing hole and
At first fixing hole 111, and alien invasion 22 is wrapped outside lower facade 17.
Such as Fig. 4, protection gate 3 includes rectangular base plate 31, the gate 35 of door frame 32 and the 3rd, and door frame 32 is fixed on rectangular base plate
Above 31, the rectangle door opening 33 of depression is left in the front end of door frame 32, and the 3rd lock is being provided with face door opening 33 above door frame 32
Gate slot 34, in the 3rd gate slot 34 built with the 3rd gate 35, in rectangular base plate 31 and positioned at the underface of the 3rd gate 35
Door lock ditch 36 is provided with, screw hole 37 is provided with the both ends of rectangular base plate 31.Protection gate 3 is fixed on disk support by screw hole 37
At 7th spoke 15 of frame 1.
Such as Fig. 5, radial link 4 includes rectangle connecting rod 41, gap gate 44, the roller 46 of push rod 45 and the 4th, connects in rectangle
Gate hole 42 is provided with before bar 41, the 4th gate slot 43 is provided with above gate hole 42, the 4th gate slot 43 built with
Gap gate 44, rectangle connecting rod 41 are provided with push rod 45, and the lower end of push rod 45 is equipped with the 4th roller 46, and the upper end of push rod 45 is connected with
Handle 47, rectangle connecting rod 41 are provided with the collar 48.Radial link 4 is enclosed on the vertical shaft 14 of disk bracket 1 by the collar 48.
Such as Fig. 6, elastic slat 5 includes rectangular strip body 51, draw back plate 52, is oriented to leg 53, indicator lamp 58 and goalpost
510, it is preceding facade 54, rear facade 55, upper section 56, lower section 57, the and of left facade 59 respectively that the surface of rectangular strip body 51, which is,
Right facade 511, forward and backward facade is smooth, indeformable during into circular arc, and draw back plate 52, right-hand member are provided with the left end of upper section 56
Provided with indicator lamp 58.It is provided with the right-hand member of lower section 57 and is oriented to leg 53, goalpost 510 is provided with left facade 59.Elastic slat 5
Lower section 57 be placed on footpath way roller 16, draw back plate 52 is placed in the gate hole 42 of radial link 4, be oriented to leg 53 be placed in guarantor
Protect in the door opening 33 of gate 3.
Such as Fig. 7, rectangular bracket 6 includes rectangular substrate 61, straight line groove 62, left slideway 63, right slideway 64, the and of front vertical plate 65
Back vertical plate 66, is provided with a plurality of parallel straight line groove 62 in the upper surface of rectangular substrate 61, left slideway 63, right slideway 64, preceding vertical
Plate 65, back vertical plate 66 are vertically fixed on the four edges of rectangular substrate 61 successively, passageway 67 are provided with the left bottom of slideway 63, in square
The edge of shape substrate 61 is provided with the 6th pin hole 68.Rectangular bracket 6 is fixed on disk bracket 1 by the 6th pin hole 68
One pin hole 18, passageway 67 is with protecting the door opening 33 of gate 3 to connect.
Such as Fig. 8, vernier ruler 7 includes ruler plate 71, vernier 73, left slider 74 and right sliding block 75, and ruler plate 71 is one
Straight hardboard, there is length scale 72 above, vernier 73 is stuck on ruler plate 71, and the left and right ends of ruler plate 71 are separately fixed at left cunning
The right sliding block 7 of block 74）On, the groove 76 of "T"-shaped shape is designed with below left slider 74 and right sliding block 75, vernier ruler 7 is by a left side
Groove 76 on the right sliding block 75 of sliding block 74 is connected on the right slideway 64 of left slideway 63 of rectangular bracket 6.
Operation principle of the present utility model is, is all constant according to circular arc and straight curvature of a curve, what is rotated around the center of circle
Circular arc is converted into the isometric tangent line that certain is put on circular arc, and the circular sector homalographic covered from the circular arc of continuous radius is changed into straightway and covered
The right angled triangle of lid.
The utility model, which has, demonstrates and measures function, can demonstrate circular arc change and the circular sector area change of different parameters
Relation simultaneously calculates its value, and operating procedure is：
1）Assembling：The one side that disk bracket is had into pulley bracket upward, fixes protection gate at the 7th spoke, carried
Playing the 3rd gate makes door opening be opening state, and the draw back plate of elastic slat is passed through protection gate, inverse time from door opening right upward
Pin direction promotes elastic slat to be moved along fixed pulley, goalpost is stuck in the spring clip of disk bracket, is oriented to leg and stays in the 3rd
The 3rd gate is pressed when in gate, all elastic lath is pressed into length order arrangement form circular sector from outside to inside.Radially connecting
The collar of bar is enclosed on the king of disk bracket, and the draw back plate of elastic slat is pressed on rectangle connecting rod, by sector disk
Cover the push rod through radial link and be covered in above disk bracket and fix it, the straight line groove of rectangular bracket is aligned
It is fixed after the guiding leg of elastic slat in 3rd gate.The sliding block of two vernier rulers be stuck in rectangular bracket a left side,
On right slideway.
2）Original state adjusts：The two-end-point for adjusting all elastic lath is on straight line, and radial link is in sector
At 0 degree on disk cover, to demonstration（Or measurement）The arc radius of figure isCentral angle is（For radian）
When, press and be in radial linkIn the range of those gap gates, and gap is stuck in goalpost, lift and be inThose gap gates, protection gate at find calibration points, press and be inThose the 3rd gates,
LiftIn the range of those the 3rd gates, and open the indicator lamp on elastic slat, adjust a vernier on rectangular bracket
Ruler withThe circle tangent line at place is consistent, and vernier is slided into 0 scale.
3）Demonstration：Catch measurement apparatus main body motionless on the other hand, the other hand catches push rod handle, clockwise slowly push-jump radial direction
Connecting rod, it is inIn the range of elastic slat indicator lamp along rectangular bracket straight line groove straight line expansion,Place
Elastic slat front end promotes vernier to advance, in radial link angle of arrivalStop push-jump during place, vernier is parked in ruler
Place,The reading at place is exactly that radius isCentral angle isCircular arc length, it is parked in rectangle support
The upper section of the elastic slat part of frame lines up a right angled triangle（For disc centre point）, indicator lamp exists entirely
On, right angled triangleAreaIt is exactly that radius isCentral angle isCircular sector
Area；
4）Terminate：Push-jump radial link counterclockwise is returned at 0 radian, is pressed and is inThose the 3rd gates, adjustment
Vernier ruler on rectangular bracket presses close to frame.
The utility model, which can demonstrate the circle fan annulus area variation relation of different parameters and measure, calculates area value quickly, operation step
Suddenly it is：
a）Assembling：With above-mentioned steps 1）It is identical；
b）Original state adjusts：Demonstrate or measure radius byArriveCentral angle is（For arc
Degree）Fan annular, press and be in radial linkIn the range of those gap gates, and gap is stuck in goalpost
On, lift and be inThose gap gates, protection gate at find calibration points,, press
Under be inThose the 3rd gates, liftIn the range of those the 3rd gates, and open elasticity
Indicator lamp on lath, adjust rectangular bracket on two vernier rulers respectively with、The circle tangent line at place is consistent, and
Vernier is all slided into 0 scale；
c）Demonstration：Catch measurement apparatus main body motionless on the other hand, the other hand catches push rod handle, clockwise slowly push-jump radial direction
Connecting rod, it is inIn the range of elastic slat indicator lamp along rectangular bracket straight line groove straight line expansion,,The elastic slat front end at place promotes vernier I, vernier II to advance（For convenience of the vernier distinguished in two vernier rulers 7, therefore
Vernier in two vernier rulers 7 is entered with vernier I, vernier II to distinguish respectively）, in radial link angle of arrivalDuring place
Stop push-jump, vernier I is in vernier rulerPlace, vernier II are parked inPlace, be parked in rectangular bracket elastic slat part it is upper
Section forms a right angle isosceles trapezoid,AreaIt is exactly circle fan ring
The area of shape。
d）Terminate：With above-mentioned steps 4）It is identical.
Described above is only preferred embodiment of the present utility model, it is noted that for the common skill of the art
For art personnel, some improvement can also be made on the premise of the utility model principle is not departed from, these improvement also should be regarded as
The scope of protection of the utility model.
Claims (8)
1. a kind of variable element circle fan annular demonstration and arc length area measuring device, it is characterised in that：Including disk bracket（1）, fan
Shape disk cover（2）, protection gate（3）, radial link（4）, elastic slat（5）, rectangular bracket（6）And vernier ruler（7）, it is described
Protect gate（3）And radial link（4）It is respectively arranged on disk bracket（1）On, and protect gate（3）With radial link（4）Mutually hang down
Directly, elastic slat（5）Disk bracket is placed in arc-shaped（1）On, and elastic slat（5）Both ends respectively with protect gate（3）
And radial link（4）It is connected, fan-shaped disk cover（2）It is covered on elastic slat（5）On, rectangular bracket（6）Located at disk bracket（1）
On, and rectangular bracket（6）Two adjacent right-angle sides are respectively with protecting gate（3）And radial link（4）Mutually touch, vernier ruler
（7）Located at rectangular bracket（6）On, radial link（4）Push-and-pull elastic slat（5）In disk bracket（1）With rectangular bracket（6）Between
The conversion of circular arc and straight line is carried out, then realizes that circle fan annular arrives triangle or trapezoidal demonstration and area measurement.
2. variable element circle fan annular demonstration as claimed in claim 1 and arc length area measuring device, it is characterised in that:The circle
Disc holder（1）Including disk（11）, pulley bracket（12）, fixed pulley（13）, vertical shaft（14）, spoke（15）, footpath way roller（16）、
Fixture mount（19）And spring clip（110）, the pulley bracket（12）It is fixed on disk（11）On, some fixed pulleys（13）Edge
Disk（11）Circumferencial direction be rotationally connected with disk（11）On, and fixed pulley（13）Positioned at pulley bracket（12）Inner side, stand
Axle（14）It is placed in disk（11）Center at, seven spokes（15）Along disk（11）Circumferencial direction be located at pulley bracket（12）With
Vertical shaft（14）Between, fixture mount（19）It is fixed on a spoke（15）On, spring clip（110）It is fixed on fixture mount（19）
On, six roots of sensation footpath way roller（16）Rotation is located at spoke described in the other six roots of sensation（15）On；The protection gate（3）And radial link
（4）It is respectively placed in orthogonal two spoke（15）Place, elastic slat（5）Tangential roller is placed in arc-shaped is overlapping（16）
On, fan-shaped disk cover（2）Cover in elastic slat（5）Top.
3. variable element circle fan annular demonstration as claimed in claim 1 and arc length area measuring device, it is characterised in that:The fan
Shape disk cover（2）Including a transparent cover plate（21）, in transparent cover plate（21）Center be provided with vertical shaft hole（24）, transparent cover plate（21）On
Provided with arc groove（23）, along arc groove（23）Inward flange be provided with circular arc scale（25）, transparent cover plate（21）Two sides on set
There is slide-rule dial（26）.
4. variable element circle fan annular demonstration as claimed in claim 1 and arc length area measuring device, it is characterised in that:The guarantor
Protect gate（3）Including rectangular base plate（31）, door frame（32）, the 3rd gate（35）And door lock ditch（36）, the door frame（32）Gu
Due to rectangular base plate（31）On, door frame（32）It is provided with rectangular-shaped door opening（33）, in door frame（32）Top and face door opening
（33）Place is provided with the 3rd gate slot（34）, the 3rd gate（35）Located at the 3rd gate slot（34）It is interior, in rectangular base plate（31）On
And it is located at the 3rd gate（35）Underface be provided with door lock ditch（36）.
5. variable element circle fan annular demonstration as claimed in claim 1 and arc length area measuring device, it is characterised in that:The footpath
To connecting rod（4）Including rectangle connecting rod（41）, gap gate（44）, push rod（45）, the 4th roller（46）, handle（47）And the collar
（48）, the rectangle connecting rod（41）It is provided with the 4th gate slot（43）, gap gate（44）Located at the 4th gate slot（43）It is interior,
Push rod（45）It is fixedly connected on rectangle connecting rod（41）On, and push rod（45）Lower end pass through rectangle connecting rod（41）And with the 4th roller
（46）It is connected, handle（47）It is fixed on push rod（45）Top, the collar（48）It is fixed on rectangle connecting rod（41）Side wall on.
6. variable element circle fan annular demonstration as claimed in claim 1 and arc length area measuring device, it is characterised in that:The bullet
Property lath（5）Including rectangular strip body（51）, draw back plate（52）, be oriented to leg（53）, indicator lamp（58）And goalpost（510）,
The draw back plate（52）, be oriented to leg（53）, indicator lamp（58）And goalpost（510）It is all connected to rectangular strip body（51）On.
7. variable element circle fan annular demonstration as claimed in claim 1 and arc length area measuring device, it is characterised in that:The square
Shape bracket（6）Including rectangular substrate（61）, left slideway (63), right slideway（64）, front vertical plate（65）With back vertical plate (66), the left side
Slideway (63), right slideway（64）, front vertical plate（65）Rectangular substrate is correspondingly arranged at respectively with back vertical plate (66)（61）Four sides
Bian Shang, in rectangular substrate（61）Be provided with some straight line grooves（62）, passageway (67) is provided with left slideway (63) bottom, in square
Shape substrate（61）Edge be provided with the 6th pin hole（68）.
8. variable element circle fan annular demonstration as claimed in claim 1 and arc length area measuring device, it is characterised in that:The trip
Mark ruler（7）Including ruler plate（71）, vernier（73）, left slider (74) and right sliding block（75）, left slider (74) and right sliding block
（75）It is respectively fixedly connected with ruler plate（71）Both sides, vernier（73）Located at ruler plate（71）On；In left slider (74) and the right side
Sliding block（75）On be equipped with T-shaped groove (76).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620963524.5U CN206657539U (en) | 2016-08-29 | 2016-08-29 | A kind of variable element circle fan annular demonstration and arc length area measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620963524.5U CN206657539U (en) | 2016-08-29 | 2016-08-29 | A kind of variable element circle fan annular demonstration and arc length area measuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206657539U true CN206657539U (en) | 2017-11-21 |
Family
ID=60313230
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620963524.5U Expired - Fee Related CN206657539U (en) | 2016-08-29 | 2016-08-29 | A kind of variable element circle fan annular demonstration and arc length area measuring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206657539U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106128232A (en) * | 2016-08-29 | 2016-11-16 | 南京工业职业技术学院 | A kind of variable element circle fan annular demonstration and arc length area measuring device |
-
2016
- 2016-08-29 CN CN201620963524.5U patent/CN206657539U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106128232A (en) * | 2016-08-29 | 2016-11-16 | 南京工业职业技术学院 | A kind of variable element circle fan annular demonstration and arc length area measuring device |
| CN106128232B (en) * | 2016-08-29 | 2022-04-01 | 南京工业职业技术学院 | Variable parameter circular fan annular demonstration and arc length area measurement device |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
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Granted publication date: 20171121 Termination date: 20200829 |