13results about "Non-circular curve drawing instruments" patented technology

The utility model discloses a multifunctional geometric drawing ruler which comprises a ruler body, and the ruler body is provided with a first circle drawing mechanism, a second circle drawing mechanism, a stereogram drawing mechanism, an angle measuring mechanism and a plurality of graph hollow-out areas. According to the multifunctional ruler, the first circle drawing mechanism, the second circle drawing mechanism, the stereogram drawing mechanism, the angle measuring mechanism and the graph hollowed-out areas in various shapes are arranged on the ruler body, so that straight lines and curves can be drawn, various angles can be read and drawn, and various sectors, arcs, polygons and stereoscopic graphs can be drawn; the circle drawing device further comprises another circle drawing mechanism with a pressing type circle center positioning button as a core, the sharp bottom of the pressing type circle center positioning button can be positioned on paper so as to play a role of a circle center, then a limiting block is adjusted to a proper position, a fastening bolt is screwed to fix the limiting block, and the circle drawing mechanism is used for drawing circles or concentric circles with different sizes. Therefore, radius adjustment is completed, and a larger circle can be drawn by rotating the ruler body with the pressing type circle center positioning button as the circle center.

The utility model discloses a multifunctional junior high school geometry tool, and relates to the technical field of drawing tools. The device comprises a square plate, an inscribed circle is formed in the square plate, a circular plate is fixedly arranged in the inscribed circle, a special-shaped groove is formed in the circular plate, a first triangular block and a second triangular block are fixedly arranged in the special-shaped groove, and one side of the first triangular block is fixedly connected with one side of the second triangular block; a plurality of first holes are formed in the circular plate; through cooperation of the square plate and the ruler, a rectangular coordinate system can be accurately drawn, two geometric circles with different diameters are drawn through the inscribed circle and the circular plate, and an equilateral triangle and a special isosceles triangle are respectively drawn through the first triangular block and the second triangular block, so that the convenience of geometric figure drawing is improved; the convenience of mathematics teaching is improved; by arranging the magnet block, the geometric tool can be attracted and fixed to the blackboard through the magnet block, and operation is convenient and fast in the geometric figure drawing process.

The utility model provides a horizontal plotting scale for drawing, which comprises a base, a three-edged ruler is arranged at the top of the base, a protractor is integrally arranged at the central position of one side of the base, a movable point ruler is rotatably connected to the central position of the protractor, an adjusting groove is formed in the movable point ruler, a movable part is movably connected to the interior of the adjusting groove, and the movable part is movably connected to the top of the base. Sliding grooves are formed in the positions, on the two sides of the movable point ruler, of the base, and positioning pieces are arranged in the sliding grooves. Compared with the prior art, the multifunctional drawing ruler has the following beneficial effects that the multifunctional drawing ruler integrates the traditional functions of a three-edged scale, a protractor, circle drawing, parallel line drawing and ellipse drawing, also has the functions of fixing drawings and conveniently moving, meets various drawing requirements of straight line drawing, angle measurement, ellipse drawing and the like, does not need to carry various tools, and is convenient to use. And the drawing efficiency is effectively improved.

The utility model relates to the field of mathematics teaching tools, and discloses a mathematics curve drawing device which comprises a fixed ruler, a rotating ruler is rotatably connected to the inner wall of the bottom end of the fixed ruler, a pull rod is connected to the top end of the fixed ruler through a connecting assembly, and a suction cup is fixedly connected to the upper side of the rear end of the fixed ruler. The lead screw is rotationally connected to the inner wall of the rotating ruler, the right end of the lead screw is fixedly connected with a rotating rod, the top end of the lead screw is connected with a supporting seat through a splicing assembly, and the top end of the supporting seat is connected with a sliding seat through a threaded assembly. The connecting assembly comprises an inserting rod connected to the top end of the fixed ruler in a sliding mode, and the bottom end of the pull rod is fixedly connected to the top end of the inserting rod. According to the drawing device, the rotating ruler can be rapidly and stably folded in the fixed ruler, carrying and storage are convenient, chalk can be clamped and fixed, the curve drawing precision and quality are improved, the chalk can be moved on the rotating ruler, and the drawing device can draw more curve shapes.

The invention provides an ellipse ruler for drawing ellipses through stepless adjustment of a semi-automatic take-up device, and relates to the technical field of drawing tools, the ellipse ruler comprises a length-adjustable main ruler assembly used for providing a focal length stepless adjustment frame, and the main ruler assembly is provided with a scale adjustment device; the auxiliary ruler assembly is movably connected with the main ruler assembly through a rotary connecting device and can rotate around the central point of the main ruler assembly; the take-up pen assembly is movably connected with the auxiliary ruler assembly through a sliding connecting device and connected to the main ruler assembly through a rope loop, and the take-up pen assembly is provided with a length adjusting device used for adjusting the length of the rope loop in a stepless mode so as to draw ellipses with different parameters. The problem of large errors is solved by adopting stepless adjustment; all the components can be flexibly adjusted, the length of the rope loop is adjusted through the semi-automatic take-up device to adapt to different ellipse parameters, use is convenient, and precision is high.

A pendulum decorating apparatus 10 comprises a base 12; a tray 14 supported by the base; an arm 18 extending upward above the tray; a tether 20 coupled to a portion of the arm above the tray; and a po

To provide a quadratic curve plotter capable of freely plotting graphs of quadratic functions (quadratic curves) with different rates of change by changing fixed positions of members constituting a device with simple operations.SOLUTION: A quadratic curve plotter comprises a frame, a guide member, a cross-shaped rotating member and a quasi-line moving member. The frame consists of a first frame and a second frame, graduated at predetermined intervals and arranged in parallel, the guide member consists of a central guide section, a focal point guide section and a quasi-line guide section, and the cross-shaped rotating member is configured to maintain verticality by a quadratic curve following section and an arm section.SELECTED DRAWING: Figure 1

According to the quadratic curve gauge, the problem of wire twisting in the ellipse drawing process is ingeniously solved in a one-high-one-low wiring mode through a cylinder on a paintbrush; the drawing principle or the measuring tape principle is utilized to solve the problem that two sides stretch out and draw back simultaneously in hyperbolic curve drawing. A traditional blackboard drawing method of a circle is innovated; the circle center and the radius are flexibly and accurately changed; the drawing problem that the distance from a parabola definition midpoint to a fixed straight line and the distance from a point to a fixed point are equal everywhere is creatively solved through the telescopic rod principle. The instrument is a teaching tool used for manually drawing circles, ellipses, hyperbolic curves and parabolas, is simple in design, scientific, standard and convenient to use, and can intuitively reflect the definition of each quadratic curve, improve the teaching efficiency, enhance the learning interest and creative ability of students, intuitively display the definition and formation of each quadratic curve and enhance the practical application ability.

The parabola drawing instrument integrates novelty, creativity and practicability and is suitable for teaching activities of mathematics and physics in junior high schools. 2, the parabola plotter can be used for plotting the parabola by only one stroke, and the gauge trace of the moving point on the parabola is vividly and vividly displayed; and compared with a point drawing method, the lines are smooth and attractive. 3, according to the design principle, the distance between a point on the parabola and the focus is equal to the distance between the point on the parabola and the directrix, and the characteristic is the basis of the design of the parabola plotter; 4, a parabola is drawn firstly, then a rectangular coordinate system is established, and compared with a traditional drawing method that the rectangular coordinate system is determined firstly and then the parabola is drawn, the drawing method is novel, ingenious in technology, simple, convenient and easy to implement.

The utility model discloses a double-headed water color pen, including pen body and pen cap portion, the pen cap portion is formed by a cover body 1 and a cover body 2 through hinge rotation connection, the cover body 1 and the cover body 2 both sides are fixedly connected through a lock catch mechanism, the pen body includes pen shell, the pen shell is internally provided with ink core and refill, the pen shell is provided with the ink core and the refill, and the ink core and the refill are fixedly connected through the lock catch mechanism. A pen point is fixedly arranged at one end of the pen shell, a pen tail is fixedly arranged at the other end of the pen shell, the pen refill penetrates through the pen point and extends to the outside, pen grooves are formed in the ends, away from each other, of the first cover body and the second cover body, first clamping rings are arranged in the pen grooves, and second clamping rings connected with the first clamping rings in a clamped mode are arranged on the pen point. The utility model relates to a double-head water color pen capable of adjusting the angle of a pen cap to realize multifunctional drawing.

The utility model relates to multifunctional compasses which comprise a compasses connecting seat, a first compasses supporting leg and a second compasses supporting leg, wherein the first compasses supporting leg and the second compasses supporting leg are rotationally connected with the compasses connecting seat. The vernier caliper assembly comprises a vernier scale, the vernier scale is movably arranged on the first compass supporting leg in a sleeving mode, at least one first measuring clamping jaw is arranged at the end, close to the compass connecting base, of the first compass supporting leg, and at least one second measuring clamping jaw is arranged at the end, close to the compass connecting base, of the vernier scale. The number of the second measuring clamping jaws is the same as that of the first measuring clamping jaws, the second measuring clamping jaws are matched with the first measuring clamping jaws in a one-to-one correspondence mode, first length scale marks are arranged on the first compass supporting leg, and vernier scale marks matched with the first length scale marks are arranged on the vernier scale. The multifunctional compasses not only realize the functions of compasses, but also can realize the functions of the vernier caliper and the magnifying glass, so that the multifunctional compasses have multiple functions, and are convenient to store and carry about for use.