CN203697786U - Rectangular frame ellipse major axis, minor axis, original point and focus point determining instrument - Google Patents
Rectangular frame ellipse major axis, minor axis, original point and focus point determining instrument Download PDFInfo
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- CN203697786U CN203697786U CN201420014671.9U CN201420014671U CN203697786U CN 203697786 U CN203697786 U CN 203697786U CN 201420014671 U CN201420014671 U CN 201420014671U CN 203697786 U CN203697786 U CN 203697786U
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- movable frame
- fixed block
- focus
- frame
- major axis
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Abstract
The utility model relates to a rectangular frame ellipse major axis, minor axis, original point and focus point determining instrument which comprises a movable frame a (10) and a movable frame b (20), wherein a sliding way a (101) on the lower surface of the movable frame a (10) is connected with a sliding way d (202) on the upper surface of the movable frame b (20) through an embedded movable sliding block a (203), a sliding way b (102) on the lower surface of the movable frame a (10) is connected with a sliding way c (201) on the upper surface of the movable frame b (20) through an embedded movable sliding block b (204), a sliding groove (103) is formed in the upper surface of the movable frame a (10), and a cylinder (104) is clamped in the sliding groove (103) and movably connected with a telescopic rod (105). The rectangular frame ellipse major axis, minor axis, original point and focus point determining instrument is simple in structure and convenient to use, and the major axis, minor axis, original point and focus point of an ellipse can be rapidly found, can be conveniently drawn by teachers and can also be conveniently understood by students.
Description
Technical field:
The utility model relates to a kind of instruments used for education, determines instrument more specifically to a kind of rectangular frame ellipse long and short shaft, initial point and focus.
Background technology:
Ellipse is that in plane, the distance sum to two fixed points is the track of the point of normal value, also may be defined as fixed point apart from to the ratio of boning out spacing be a track that is less than the point of 1 normal value.It is the one of conic section, i.e. the transversal of circular cone and plane.Ellipse can be written as normal formula x^2/a^2+y^2/b^2=1 on equation, and it also has some other expression-form, as parametric equation represents etc.Ellipse moves in three laws and has played the part of key player at Kepler's planet, and planetary orbit is oval, take fixed star as focus.Major axis=2a, minor axis=2b, between focus, distance is exactly focal length=2c, a
2-b
2=c
2, in oval teaching, if teacher does not have a kind of instrument of demonstration to be just difficult to show oval principle in face of student, determine that instrument is very useful so design a kind of rectangular frame ellipse long and short shaft, initial point and focus.
Utility model content:
The purpose of this utility model is exactly for the deficiencies in the prior art, and provides a kind of rectangular frame ellipse long and short shaft, initial point and focus to determine instrument.The utlity model has simple in structure, easy to use, by movable frame a and movable frame b frame at oval outer surface, centre in movable frame a and movable frame b is leaned against on oval four summits, connect two summits of subtend, can determine major and minor axis and initial point, sliding cylinder, make it to lean against short the tip of the axis, pull-out expansion link equals the distance of major axis half, rotates expansion link, and the intersection point of expansion link and major axis is exactly focus, be convenient to teacher and draw oval major and minor axis, initial point and focus, be also convenient to the advantage that student understands.
Technology solution of the present utility model is as follows:
A kind of rectangular frame ellipse long and short shaft, initial point and focus are determined instrument, comprise movable frame a and movable frame b, between the slideway d of the slideway a of described movable frame a lower surface and movable frame b upper surface, be connected by the movable slider a inlaying, between the slideway c of the slideway b of movable frame a lower surface and movable frame b upper surface, be connected by the movable slider b inlaying, movable frame a upper surface has a chute, in chute, card has a cylinder, is connected with an expansion link on cylinder.
In technique scheme, on described movable frame a, be carved with horizontal scale.
In technique scheme, on described movable frame b, be carved with longitudinal scale.
In technique scheme, on described movable frame a, be fixed with a fixed block a and fixed block b, on movable frame b, be fixed with a fixed block c and fixed block d, between fixed block a and fixed block d, interconnection has Cowhells a, and between fixed block b and fixed block c, interconnection has Cowhells b.
The beneficial effects of the utility model are:
The utility model is simple in structure, easy to use, by movable frame a and movable frame b frame at oval outer surface, centre in movable frame a and movable frame b is leaned against on oval four summits, connect two summits of subtend, can determine major and minor axis and initial point, sliding cylinder, make it to lean against short the tip of the axis, pull-out expansion link equals the distance of major axis half, rotates expansion link, and the intersection point of expansion link and major axis is exactly focus, be convenient to teacher and draw oval major and minor axis, initial point and focus, be also convenient to student and understand.
Accompanying drawing explanation:
Fig. 1 is the utility model structural representation.
In figure: 10, movable frame a; 101, slideway a; 102, slideway b; 103, chute; 104, cylinder; 105, expansion link; 106, horizontal scale; 107, fixed block a; 1071, Cowhells a; 108, fixed block b; 20, movable frame b; 201, slideway c; 202, slideway d; 203, movable slider a; 204, movable slider b; 205, longitudinal scale; 206, fixed block c; 2061, Cowhells b; 207, fixed block d.
The specific embodiment:
The following stated is only preferred embodiment of the present utility model, not scope of the present utility model is limited.
Embodiment: as shown in Figure 1, a kind of rectangular frame ellipse long and short shaft, initial point and focus are determined instrument, comprise movable frame a10 and movable frame b20, between the slideway d202 of the slideway a101 of described movable frame a10 lower surface and movable frame b20 upper surface, be connected by the movable slider a203 inlaying, between the slideway c201 of the slideway b102 of movable frame a10 lower surface and movable frame b20 upper surface, be connected by the movable slider b204 inlaying, movable frame a10 upper surface has a chute 103, the interior card of chute 103 has a cylinder 104, on cylinder 104, be connected with an expansion link 105.
On described movable frame a10, be carved with horizontal scale 106.
On described movable frame b20, be carved with longitudinal scale 205.
On described movable frame a10, be fixed with a fixed block a107 and fixed block b108, on movable frame b20, be fixed with a fixed block c206 and fixed block d207, between fixed block a107 and fixed block d207, interconnection has Cowhells a1071, and between fixed block b108 and fixed block c206, interconnection has Cowhells b2061.
Operation principle:
A kind of rectangular frame ellipse long and short shaft, initial point and focus are determined instrument, between the slideway d202 of the slideway a101 of movable frame a10 lower surface and movable frame b20 upper surface, be connected by the movable slider a203 inlaying, between the slideway c201 of the slideway b102 of movable frame a10 lower surface and movable frame b20 upper surface, be connected by the movable slider b204 inlaying, movable frame a10 upper surface has a chute 103, the interior card of chute 103 has a cylinder 104, on cylinder 104, be connected with an expansion link 105, on movable frame a10, be carved with horizontal scale 106, on movable frame b20, be carved with longitudinal scale 205, on movable frame a10, be fixed with a fixed block a107 and fixed block b108, on movable frame b20, be fixed with a fixed block c206 and fixed block d207, between fixed block a107 and fixed block d207, interconnection has Cowhells a1071, between fixed block b108 and fixed block c206, interconnection has Cowhells b2061, by movable frame a10 and movable frame b20 frame at oval outer surface, the intermediate point of movable frame a10 and movable frame b20 inner ring is leaned against on oval four summits, connect two summits of subtend, can determine major and minor axis and initial point, the intersection point of Cowhells a1071 is the mid point of oval major axis, the intersection point of Cowhells b2061 is the mid point of oval minor axis, sliding cylinder 104, make it to lean against short the tip of the axis, pull-out expansion link 105 equals the distance of major axis half, rotate expansion link 105, make the end of expansion link 105 crossing with major axis, because major axis=2a, minor axis=2b, between focus, distance is exactly focal length=2c, a
2-b
2=c
2so the intersection point of expansion link and major axis is exactly focus.
Claims (4)
1. a rectangular frame ellipse long and short shaft, initial point and focus are determined instrument, comprise movable frame a(10) and movable frame b(20), it is characterized in that: described movable frame a(10) the slideway a(101 of lower surface) and movable frame b(20) the slideway d(202 of upper surface) between by the movable slider a(203 inlaying) be connected, movable frame a(10) the slideway b(102 of lower surface) and movable frame b(20) the slideway c(201 of upper surface) between by the movable slider b(204 inlaying) be connected, movable frame a(10) upper surface has a chute (103), in chute (103), card has a cylinder (104), on cylinder (104), be connected with an expansion link (105).
2. a kind of rectangular frame ellipse long and short shaft according to claim 1, initial point and focus are determined instrument, it is characterized in that: described movable frame a(10) on be carved with horizontal scale (106).
3. a kind of rectangular frame ellipse long and short shaft according to claim 1, initial point and focus are determined instrument, it is characterized in that: described movable frame b(20) on be carved with longitudinal scale (205).
4. a kind of rectangular frame ellipse long and short shaft according to claim 1, initial point and focus are determined instrument, it is characterized in that: described movable frame a(10) on be fixed with a fixed block a(107) with fixed block b(108), movable frame b(20) on be fixed with a fixed block c(206) with fixed block d(207), fixed block a(107) and fixed block d(207) between interconnection have Cowhells a(1071), fixed block b(108) and fixed block c(206) between interconnection have Cowhells b(2061).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420014671.9U CN203697786U (en) | 2014-01-10 | 2014-01-10 | Rectangular frame ellipse major axis, minor axis, original point and focus point determining instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420014671.9U CN203697786U (en) | 2014-01-10 | 2014-01-10 | Rectangular frame ellipse major axis, minor axis, original point and focus point determining instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203697786U true CN203697786U (en) | 2014-07-09 |
Family
ID=51048276
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420014671.9U Expired - Fee Related CN203697786U (en) | 2014-01-10 | 2014-01-10 | Rectangular frame ellipse major axis, minor axis, original point and focus point determining instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203697786U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104708961A (en) * | 2015-03-15 | 2015-06-17 | 田元元 | Rectangle drawing tool |
| CN106994856A (en) * | 2016-01-25 | 2017-08-01 | 翁金环 | A kind of electronics ellipsograph |
-
2014
- 2014-01-10 CN CN201420014671.9U patent/CN203697786U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104708961A (en) * | 2015-03-15 | 2015-06-17 | 田元元 | Rectangle drawing tool |
| CN106994856A (en) * | 2016-01-25 | 2017-08-01 | 翁金环 | A kind of electronics ellipsograph |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140709 Termination date: 20150110 |
|
| EXPY | Termination of patent right or utility model |