CN2093101U - Three-purpose ellipsograph for teaching - Google Patents
Three-purpose ellipsograph for teaching Download PDFInfo
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- CN2093101U CN2093101U CN 91202643 CN91202643U CN2093101U CN 2093101 U CN2093101 U CN 2093101U CN 91202643 CN91202643 CN 91202643 CN 91202643 U CN91202643 U CN 91202643U CN 2093101 U CN2093101 U CN 2093101U
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- ellipsograph
- folding arm
- teaching
- plug
- sleeve
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Abstract
The utility model relates to a three-purpose ellipsograph for teaching, mainly comprising an ellipsograph body, a focal-point slide block, two alpha strings, a rubber vacuum sucking-disc, a rotary pen-holder with a telescopic sleeve, a plug and a folding arm. The center of the ellipsograph is provided with the rotary pen-holder with a telescopic sleeve, and the folding arm can be inserted at both ends of the compass body. Adopting a draw pen which is connected with the compass body and is telescopic, and by rotating for a round, the ellipsograph can draw a complete and exact ellipse or a complete circle. Capable of being used along and being used for drawing hyperbolas by being combined with the accessories, the utility model is provided for the teachers to draw or demonstrate on the blackboard.
Description
The utility model is a kind of drawing instrument, belongs to teaching aid, can for the teacher on blackboard, draw oval, just justify, hyperbola or demonstrate used.
Ellipsograph is used in existing teaching, generally according to oval conceptual design, promptly ties up to 2 fixing fine rules last, that length equals 2a with one of chalk tensioning, and chalk is taken advantage of a situation around these 2 rotations, and ellipse draws.Such as B43L11/04892082780, X, classroom instruction is exactly this type with ellipsograph (5-48).
The deficiency of this ellipsograph and shortcoming are to use inconvenient and draw inaccurate.
The teaching ellipsograph needs ellipsograph to be fixed on the blackboard temporarily.The 2a line can't pass through fixing point under the rule body, about need dividing like this twice, and the ellipse that at every turn draws half, and also two semiellipses are difficult to accurate linking, the formation closed curve.If the 2a line on the rule body, when chalk passes through rule body extension line, 2a line kink phenomenon certainly will occur so.The thinnest chalk diameter is pressed 8mm and is calculated, because the kink of 2a line, will cause the nearly 5mm error of drawn oval Origin And Destination can not be closed.
In a word, existing teaching ellipsograph when the oval notion of explanation, is used for ocular demonstration, and oval essential attribute is described, can play great role.But be used for drawing, use trouble, it is inaccurate to draw.One speech to be covering one, the practicality deficiency, and illustrative is had a surplus.
The purpose of this utility model is to provide a kind of practical and convenient three to use ellipsograph for the teacher.Remedy the inconvenient weak point of existing ellipsograph use, make it as drawing circle with compasses, the complete ellipse figure that once draws overcomes the inaccurate and single shortcoming of purposes of existing ellipsograph picture, is equipped with annex, can use more.Melting practicality and illustrative is one.
Ellipsograph is used in the said teaching three of the utility model, it is characterized in that by the ellipsograph that can draw ellipse and just justify shown in the accompanying drawing 2, be equipped with by plug, folding arm, the folding arm rotating shaft annex that fixed screw, butterfly nut, tensioning spring constituted of holding concurrently, be combined into a kind of ellipse, just circle, hyp drawing instrument drawn.
The said ellipsograph of the utility model is made of rule body, focus sliding tray, focus sliding shoe, the stake of cucurbit shape anchor line (string), 8 font snap rings, 2a line, 2a ply-yarn drill, vacuum rubber sucker, the flexible commentaries on classics of sleeve penholder, chalk socket, it is characterized in that having an end in rule body center links with the rule body, and can be around the flexible penholder that changes of the sleeve that the rule body freely rotates, the flexible other end that changes penholder of sleeve has two identical chalk sockets up and down.
Being coupled to each other and the position relation between this teaching three usefulness ellipsographs structures, each parts, and each parts effect and using method are as follows:
Accompanying drawing 1 is the structural representation of an embodiment of teaching three usefulness ellipsographs.
Accompanying drawing 2 is structural representations of ellipsograph.
Accompanying drawing 3 is structural representations of annex.
Accompanying drawing 4 is each parts decomposition and combination figure of teaching three usefulness ellipsographs.
In the accompanying drawing 1, rule bodies (1) are the carriers of each parts, and metal tube is made.On the rule bodies (1), have two focus sliding trays (2), be left-right symmetry, the other scale that indicates of groove.In rule bodies (1), the length range of limit focus sliding tray (2), focus slide block (3) can horizontally slip, and is used to adjust the focal position.Cucurbit shape anchor line (string) stake (4), on focus slide block (3), thread connection is used in focus slide block (3) and cucurbit shape anchor line (string) stake (4).Between the waist of cucurbit shape anchor line (string) stake (4), card has 8 font snap rings (5), and 8 font snap rings (5) can take off from cucurbit shape anchor line (string) stake (4) at any time, also can be stuck at any time in the cucurbit shape anchor line (string) stake (4), 8 font snap rings (5) can be gone up in cucurbit shape anchor line (string) stake (4) and freely rotate.2a line (6) is the fine rule of an inductility, the 2a line (6) of different length, and different ellipses can draw.One end of 2a line (6) ties up on the 8 font snap rings (5), and 8 font snap rings (5) are stuck in the cucurbit shape anchor line (string) stake (4).The other end of 2a line (6) passes from being 2a ply-yarn drill cylindraceous (7) the tube heart, one end of 2a ply-yarn drill (7) is welded with link hook (8), link hook (8) can hang on the 8 font snap rings (5), the centre of 2a ply-yarn drill (7) has jackscrew (9), screw jackscrew (9), 2a ply-yarn drill (7) may be stuck on any position of 2a line (6), be used to adjust the length of 2a line (6), by means of 8 font snap rings (5) and 2a ply-yarn drill (7), the other end of 2a line (6) is connected in another cucurbit shape anchor line (string) stake (4).Vacuum rubber sucker (10) is below focus slide block (3), vacuum rubber sucker (10) is used thread connection with focus slide block (3), screw screw thread, can be fixed on focus slide block (3) and vacuum rubber sucker (10) on the required scale position of rule bodies (1) simultaneously, vacuum rubber sucker (10) can be fixed on rule bodies (1) on the blackboard (sees the A in the accompanying drawing 4).
Sleeve is flexible, and to change penholder (11) be to be nested together with the metal tube that an internal diameter equals another external diameter, and two ends are pressed into flat, grind off wedge angle, and are drilled with circular hole at flat part.Inner sleeve can freely rotate in outer sleeve and stretch, and inner sleeve is marked with scale.Screw the flexible penholder fixed screw (12) that changes of sleeve, the flexible penholder (11) that changes of sleeve can not freely be stretched.
The flexible penholder (11) that changes of sleeve indicates (13) to connect with rule bodies (1) by the middle font axle center of holding concurrently, the middle font axle center of holding concurrently indicates (13) to be positioned at the center of rule bodies (1), the middle font axle center of holding concurrently indicates (13) and rule bodies (1) to use thread connection, (13) tip portion below rule bodies (1) is indicated at the middle font axle center of holding concurrently, be the elliptical center indication, the font axle was held concurrently center indication (13) at the upper part of advising bodies (1) during the flexible end that changes penholder (11) of sleeve was enclosed within, the middle font axle center of holding concurrently indicates (13) top to have anticreep nut (14), prevent that the flexible penholder (11) that changes of sleeve from coming off, the flexible penholder (11) that changes of sleeve can indicate (13) freely to rotate (seeing B in the accompanying drawing 4) around the middle font axle center of holding concurrently.
Chalk socket (15) is positioned at the flexible other end that changes penholder (11) of sleeve, two identical chalk sockets (15) connect mutually with screw thread up and down, the flexible penholder (11) that changes of sleeve is pressed in the centre, and chalk (16) is inserted in chalk socket (15) lining (seeing the C in the accompanying drawing 4).
The flexible effect of changeing penholder (11) of sleeve is that chalk (16) and rule bodies (1) are combined as a whole, the kink (seeing using method) of 2a line (6) in the time of can preventing to draw again simultaneously.Screw the flexible penholder fixed screw (12) that changes of sleeve in addition, utilize the flexible penholder (11) that changes of sleeve can draw just round.
The main effect of annex is tensioning (hyperbolic) 2a line, it constitutes as shown in Figure 3, plug (17) and folding arm (18) connect with the folding arm rotating shaft fixed screw (19) of holding concurrently, and the folding arm rotating shaft fixed screw (19) of holding concurrently has butterfly nut (20) (seeing D in the accompanying drawing 4).Folding arm (18) is gone up around the folding arm rotating shaft fixed screw (19) of holding concurrently and can be rotated up and down at plug (17), screw butterfly nut (20), can be fixed on folding arm (18) on the appropriate location of plug (17), by tensioning spring (21), tensioning (hyperbolic) 2a line (6).Plug (17) can be inserted in the two ends of rule bodies (1), with annex fixed screw (22) plug (17) is fixed on the rule bodies (1).Ellipsograph is equipped with annex can draw hyperbola.
Using method:
Draw oval
According to the elliptical shape that will draw, suitably adjust the position of focus slide block (3), utilize the flexible scale that changes on the penholder (11) of sleeve to adjust the length of 2a line (6), utilize vacuum rubber sucker (10) that ellipsograph is fixed on and be fit to the position on the blackboard.2a line (6) is walked around chalk socket (15), hand-held chalk socket (15), by flexible penholder (11) the tensioning 2a line (6) that changes of sleeve, take advantage of a situation and rotate chalk socket (15) when the extended line place that goes to rule bodies (1), when 2a line (6) will be twisted together, chalk socket (15) immediately overturn, make below top being turned to, can prevent the intersection kink of 2a line (6) like this, rotate a circle that complete ellipse once accurately draws.
Draw just round
It is the center of circle that the most advanced and sophisticated indication of (13) is indicated at the middle font axle center of holding concurrently, screw the flexible penholder fixed screw (12) that changes of sleeve, and make chalk socket (15) vertical with the drawing plane, at this moment the flexible length of changeing penholder (11) of sleeve is radius, around the middle font axle flexible penholder (11) that changes of center indication (13) turnbarrel of holding concurrently, the radius that can draw is greater than half just round of the length of rule bodies (1).
Draw hyperbola
Plug (17) is inserted an end of advising bodies (1), screw annex fixed screw (22), plug (17) is fixed on the rule bodies (1).If only draw hyperbola, do not need the picture ellipse for the moment, can unload the flexible penholder (11) that changes of lower sleeve temporarily.According to drawing hyp shape, suitably adjust the position of focus slide block (3) and the length of (hyperbolic) 2a line (6).Utilize vacuum rubber sucker (10) that three usefulness ellipsographs are fixed on the blackboard, (hyperbolic) 2a line (6) is bound on the tensioning spring (21), adjusts folding arm (18) and the angle of advising bodies (1), makes (hyperbolic) 2a line (6) be in tensioning state.Near intersection (hyperbolic) 2a line (6) tensioning spring (21), and be inserted in chalk or powder arm socket (15), (chalk socket (15) can be unloaded down at any time, more flexible with the motion of chalk socket (15) picture), take advantage of a situation motion chalk or chalk socket (15), to advising near the body (1), half of one of the hyperbola of drawing.Below folding arm (18) is turned to, use with quadrat method and draw second half.Plug (17) is fixed in the other end of rule bodies (1), exchanges 8 font snap rings (5) in the cucurbit shape anchor line (string) stake (4), can draw equally hyp another.
Adopt originally in the teaching and three use ellipsograph, drawn figure is clear, standard, save time, laborsaving, draw oval as drawing circle with compasses, remove the hardship of free-hand drawing in the teachers ' teaching, draw two graphics calculations by every class, can save one fen time, rule to be used, easy to use, be teacher's serviceable tools.
To oval, hyperbola concept teaching, this teaching aid has the ocular demonstration effect, is convenient to the profound understanding of student to relevant notion, improves teaching condition, helps the raising of quality of instruction.
Claims (4)
1, ellipsograph is used in a kind of teaching three, form by flexible the hold concurrently fixed screw (19), butterfly nut (20), annex fixed screw (22) of penholder (11), chalk socket (15), plug (17), folding arm (18), folding arm rotating shaft that change of rule body (1), focus sliding tray (2), focus slide block (3), cucurbit shape anchor line (string) stake (4), 2a line (6), vacuum rubber sucker (10), sleeve, it is characterized in that having the flexible penholder (11) that changes of sleeve in rule body (1) center, folding arm (18) can be inserted in the two ends of rule bodies (1) by plug (17).
2, ellipsograph is used in teaching three according to claim 1, it is characterized in that flexible penholder (11) one ends that change of sleeve connect with rule body (1) center, and the other end has identical two chalk sockets (15) up and down.
3, ellipsograph is used in teaching three according to claim 1, it is characterized in that folding arm (18) is gone up around the folding arm rotating shaft fixed screw (19) of holding concurrently at plug (17) rotates, screw butterfly nut (20), folding arm (18) is fixed on the desired location of plug (17).
4, ellipsograph is used in teaching three according to claim 1, it is characterized in that plug (17) with annex fixed screw (22), is fixed on the rule bodies (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91202643 CN2093101U (en) | 1991-02-09 | 1991-02-09 | Three-purpose ellipsograph for teaching |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91202643 CN2093101U (en) | 1991-02-09 | 1991-02-09 | Three-purpose ellipsograph for teaching |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2093101U true CN2093101U (en) | 1992-01-15 |
Family
ID=4913149
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91202643 Pending CN2093101U (en) | 1991-02-09 | 1991-02-09 | Three-purpose ellipsograph for teaching |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2093101U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1070123C (en) * | 1998-09-30 | 2001-08-29 | 周路定 | Method and device for setting focus curve instrument |
| CN111497502A (en) * | 2020-04-28 | 2020-08-07 | 西安工程大学 | Mathematical ellipse drawing tool |
| CN112895774A (en) * | 2019-12-03 | 2021-06-04 | 南京科技职业学院 | Method for manufacturing ellipse diagraph teaching aid for blackboard |
-
1991
- 1991-02-09 CN CN 91202643 patent/CN2093101U/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1070123C (en) * | 1998-09-30 | 2001-08-29 | 周路定 | Method and device for setting focus curve instrument |
| CN112895774A (en) * | 2019-12-03 | 2021-06-04 | 南京科技职业学院 | Method for manufacturing ellipse diagraph teaching aid for blackboard |
| CN111497502A (en) * | 2020-04-28 | 2020-08-07 | 西安工程大学 | Mathematical ellipse drawing tool |
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| C06 | Publication | ||
| PB01 | Publication | ||
| AD01 | Patent right deemed abandoned |