CN205058985U - Geometric construction instrument - Google Patents
Geometric construction instrument Download PDFInfo
- Publication number
- CN205058985U CN205058985U CN201520822608.2U CN201520822608U CN205058985U CN 205058985 U CN205058985 U CN 205058985U CN 201520822608 U CN201520822608 U CN 201520822608U CN 205058985 U CN205058985 U CN 205058985U
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- CN
- China
- Prior art keywords
- leg
- axle
- sliding shoe
- supporting leg
- sliding
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model discloses a geometric construction instrument, its characterized in that: including axle a leg, landing leg, chalk participate in, first sliding block, the second sliding shoe and snakelike chi, the upper end of landing leg is articulated with the upper end of axle leg, offers the landing leg groove that is used for holding the landing leg, landing leg trench in one side of axle leg on the axle leg to after making landing leg and axle leg folding relatively, the landing leg can be hidden into the landing leg inslot completely, thereby saves the volume, portable, slip track groove has been seted up to the opposite side of axle leg, and slip track inslot slides and is provided with first sliding block and the second sliding shoe, and the both ends of snakelike chi are fixed respectively on first sliding block and the second sliding shoe, not only can realize the function of compasses, can also draw complicated curve structure through snakelike chi.
Description
Technical field
The utility model relates to a kind of geometric construction instrument.
Background technology
Geometry is exactly a subject of research space structure and character.It is one of research contents the most basic in mathematics, and with the status analyzed, algebraically etc. has no less important, and relation is very close.This word of geometry comes from Greek the earliest, the measurement in former finger soil, i.e. geodetic art." geometry " in Chinese word, is when Ming Dynasty's M. Ricci, Xu Guangqi close and translate " euclid's elements " the earliest, is created by Xu Guangqi.Do not provide at that time according to basis, think that geometry may be the transliteration of the Greek GEO of Latinize on the one hand later age more, utilize geometric ways to set forth the content of number theory owing to also having in " euclid's elements " on the other hand, also may be the free translation of magnitude (how much), thus it is generally acknowledged that geometry is the sound of geometria, meaning translating.Do not passing through at that time about the translation of geometry in " euclid's elements " that 1607 publish, contemporaryly also there is another kind of translated name---shape is learned, as Mateer, Calvin Wilson, Zou Liwen, Liu Yongxi compiling " shape learns standby purport ", also having a certain impact at that time.Be apt to orchid Lee in 1857, pegmatite-type rare metal deposit continue " euclid's elements " translated afterwards 9 roll out version after, although the name of geometry obtains certain attention, but until just there has been obvious replacement shape to learn the trend of a word when 20 beginning of the century, turns over edition Xu Shu merit as 1910 " shape learns standby purport " the 11st printing Chengdu and be just renamed as " continuous geometry ".Until mid-term in 20th century, the use of " shape " word is rarely had to occur.
Geometry is the basic subject of exploitation students' learning ability, Developing Students ' thinking ability.Relate to the drafting of the figures such as a large amount of straight lines, angle, curve in geometry teaching process, thus pass through figure intuitively by these and strengthen the impression of student for pertinent definition, theorem, axiom and interdependent reasoning from logic process.In existing plane geometry drawing course, because the pattern class related to is many, often need just can carry out drawing performance in conjunction with multiple drawing instrument, improve the work burden of teacher, improve the purchase cost of equipment.
Utility model content
The purpose of this utility model is to overcome above shortcomings in prior art, and provides a kind of reasonable in design, the geometric construction instrument of diverse in function.
The technical scheme in the invention for solving the above technical problem is:
A kind of geometric construction instrument, it is characterized in that: comprise axle leg, supporting leg, chalk pin, first sliding shoe, the second sliding shoe and snakelike chi, the upper end of supporting leg and the upper end thereof of axle leg, axle leg offers the supporting leg groove for holding supporting leg, supporting leg slot is in the side of axle leg, thus make supporting leg relative with axle leg folding after, supporting leg can be hidden in supporting leg groove completely, thus saving volume, be easy to carry, the opposite side of described axle leg offers sliding rail groove, slide in sliding rail groove and be provided with the first sliding shoe and the second sliding shoe, the two ends of snakelike chi are separately fixed on the first sliding shoe and the second sliding shoe, the length of snakelike chi and the length of sliding rail groove adapt, thus when making the first sliding shoe and the second sliding shoe lay respectively at the two ends of sliding rail groove, snakelike chi is pullled linear state, thus make snakelike chi can abut against the opposite side of axle leg, thus saving volume, be easy to carry.Adopt this structure, not only can realize the function of compasses, complicated curvilinear structures can also be drawn by snakelike chi, and the snakelike chi that relative market is arranged separately, the utility model is because the two ends of snakelike chi are by the first sliding shoe and the second sliding shoe, realize, with the connection of axle leg, comparatively stable modeling effect can being kept, thus obtain better drawing effect.
As preferably, the upper end of supporting leg is fixed with connecting axle, and connecting axle is rotatably installed in the upper end of axle leg, and the upper end of axle leg is fixed with disk, disk is provided with angle index line, the end winding support of described connecting axle has and is used to indicate the pointer that supporting leg and axle leg relatively rotate angle.Adopt this structure, angle can be drawn by supporting leg and connecting axle.
As preferably, supporting leg is provided with size scale line.Adopt this structure, can straight line be drawn.
As preferably, described chalk pin is made up of a tubular working of plastics, and the lower ending opening of tubular working of plastics is up-small and down-big structure.
As preferably, the line segment of axle leg has been screwed rubber antiskid head, pivot when rubber antiskid head uses as compasses.Adopt this structure, not only good antiskid effect, and to blackboard fanout free region.
As preferably, described first sliding shoe and the second sliding shoe are provided with for by the first sliding shoe and the fixing set bolt of the second sliding shoe relative sliding track groove, described set bolt is rotatably installed on the first sliding shoe and the second sliding shoe, set bolt is connected with the clamp nut for being pressed on axle leg by threaded engagement, thus be pressed on axle leg by clamp nut, keep the first sliding shoe, the second sliding shoe relative sliding track groove fixes.
The utility model compared with prior art, have the following advantages and effect: the function that not only can realize compasses, complicated curvilinear structures can also be drawn by snakelike chi, and the snakelike chi that relative market is arranged separately, the utility model is because the two ends of snakelike chi are by the first sliding shoe and the second sliding shoe, realize, with the connection of axle leg, comparatively stable modeling effect can being kept, thus obtain better drawing effect.
Accompanying drawing explanation
Structural representation when Fig. 1 is the utility model embodiment geometric construction instrument folding.
Fig. 2 be the utility model embodiment geometric construction instrument as view during compasses.
Fig. 3 is the using state schematic diagram of the snakelike chi of the utility model embodiment.
Detailed description of the invention
Below in conjunction with accompanying drawing, also by embodiment, the utility model is described in further detail, and following examples are that the utility model is not limited to following examples to explanation of the present utility model.
See Fig. 1-Fig. 3, the present embodiment geometric construction instrument, comprise axle leg 1, supporting leg 2, chalk pin 3, first sliding shoe 41, the second sliding shoe 42 and snakelike chi 43, the upper end of supporting leg 2 and the upper end thereof of axle leg 1, axle leg 1 offers the supporting leg groove 51 for holding supporting leg 2, supporting leg groove 51 is positioned at the side of axle leg 1, thus make supporting leg 2 relative with axle leg 1 folding after, supporting leg 2 can be hidden in supporting leg groove 51 completely, thus saving volume, be easy to carry, the opposite side of described axle leg 1 offers sliding rail groove 52, slide in sliding rail groove 52 and be provided with the first sliding shoe 41 and the second sliding shoe 42, the two ends of snakelike chi 43 are separately fixed on the first sliding shoe 41 and the second sliding shoe 42, the length of snakelike chi 43 and the length of sliding rail groove 52 adapt, thus when making the first sliding shoe 41 and the second sliding shoe 42 lay respectively at the two ends of sliding rail groove 52, snakelike chi 43 is pullled linear state, thus make snakelike chi 43 can abut against the opposite side of axle leg 1, thus saving volume, be easy to carry.Snake chi, also known as snakelike chi 43, curve template, one of drawing instrument, for adding the software chi that flexible metal core bar is made in the middle of a kind of material very strong in plasticity (being generally soft rubber), two-sided blade, a little as the tape measure, the tape that thicken, can freely be put into various arc shape, and can fix.Snake chi is gained the name as snake because of softness, can curvature quite high, be generally used for drafting not rounded free curve.When trace, first make the point of sufficient amount on it, by the distortion of snake chi, make its series winding diverse location point, tightly by after just can draw curve with pen sleekly along snake chi.Snake chi indicates scale at curved edge in addition, also can be used for measuring arc length.Said structure, not only can realize the function of compasses, complicated curvilinear structures can also be drawn by snakelike chi 43, and the snakelike chi 43 that relative market is arranged separately, the utility model is because the two ends of snakelike chi 43 are by the first sliding shoe 41 and the second sliding shoe 42, realize, with the connection of axle leg 1, comparatively stable modeling effect can being kept, thus obtain better drawing effect.
The upper end of supporting leg 2 is fixed with connecting axle 61, connecting axle 61 is rotatably installed in the upper end of axle leg 1, the upper end of axle leg 1 is fixed with disk 62, disk 62 is provided with angle index line, the end winding support of described connecting axle 61 has and is used to indicate the pointer 63 that supporting leg 2 and axle leg 1 relatively rotate angle, thus can draw angle by supporting leg 2 and connecting axle 61.As preferably, supporting leg 2 is provided with size scale line, thus straight line can be drawn by supporting leg 2.Described chalk pin 3 is made up of a tubular working of plastics, and the lower ending opening of tubular working of plastics is up-small and down-big structure.The line segment of axle leg 1 has been screwed rubber antiskid head 7, pivot when rubber antiskid head 7 uses as compasses, not only good antiskid effect, and to blackboard fanout free region.Described first sliding shoe 41 and the second sliding shoe 42 are provided with for by the first sliding shoe 41 and the fixing set bolt 81 of the second sliding shoe 42 relative sliding track groove 52, described set bolt 81 is rotatably installed on the first sliding shoe 41 and the second sliding shoe 42, set bolt 81 is connected with the clamp nut 82 for being pressed on axle leg 1 by threaded engagement, thus be pressed on axle leg 1 by clamp nut 82, keep the first sliding shoe 41, the second sliding shoe 42 relative sliding track groove 52 fixing.
Above content described in this description is only to the explanation of the utility model example.The utility model person of ordinary skill in the field can make various amendment or supplements or adopt similar mode to substitute to described specific embodiment; only otherwise depart from the content of the utility model description or surmount this scope as defined in the claims, protection domain of the present utility model all should be belonged to.
Claims (6)
1. a geometric construction instrument, it is characterized in that: comprise axle leg, supporting leg, chalk pin, first sliding shoe, the second sliding shoe and snakelike chi, the upper end of supporting leg and the upper end thereof of axle leg, axle leg offers the supporting leg groove for holding supporting leg, supporting leg slot is in the side of axle leg, thus make supporting leg relative with axle leg folding after, supporting leg can be hidden in supporting leg groove completely, the opposite side of described axle leg offers sliding rail groove, slide in sliding rail groove and be provided with the first sliding shoe and the second sliding shoe, the two ends of snakelike chi are separately fixed on the first sliding shoe and the second sliding shoe, the length of snakelike chi and the length of sliding rail groove adapt, thus when making the first sliding shoe and the second sliding shoe lay respectively at the two ends of sliding rail groove, snakelike chi is pullled linear state, thus make snakelike chi can abut against the opposite side of axle leg.
2. geometric construction instrument according to claim 1, it is characterized in that: the upper end of supporting leg is fixed with connecting axle, connecting axle is rotatably installed in the upper end of axle leg, the upper end of axle leg is fixed with disk, disk is provided with angle index line, the end winding support of described connecting axle has and is used to indicate the pointer that supporting leg and axle leg relatively rotate angle.
3. geometric construction instrument according to claim 1, is characterized in that: supporting leg is provided with size scale line.
4. geometric construction instrument according to claim 1, is characterized in that: described chalk pin is made up of a tubular working of plastics, and the lower ending opening of tubular working of plastics is up-small and down-big structure.
5. geometric construction instrument according to claim 1, is characterized in that: the line segment of axle leg has been screwed rubber antiskid head.
6. geometric construction instrument according to claim 1, it is characterized in that: described first sliding shoe and the second sliding shoe are provided with for by the first sliding shoe and the fixing set bolt of the second sliding shoe relative sliding track groove, described set bolt is rotatably installed on the first sliding shoe and the second sliding shoe, and set bolt is connected with the clamp nut for being pressed on axle leg by threaded engagement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520822608.2U CN205058985U (en) | 2015-10-22 | 2015-10-22 | Geometric construction instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520822608.2U CN205058985U (en) | 2015-10-22 | 2015-10-22 | Geometric construction instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205058985U true CN205058985U (en) | 2016-03-02 |
Family
ID=55385582
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520822608.2U Expired - Fee Related CN205058985U (en) | 2015-10-22 | 2015-10-22 | Geometric construction instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205058985U (en) |
-
2015
- 2015-10-22 CN CN201520822608.2U patent/CN205058985U/en not_active Expired - Fee Related
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160302 Termination date: 20161022 |