CN203666192U

CN203666192U - Parabola drawing tool

Info

Publication number: CN203666192U
Application number: CN201320869684.XU
Authority: CN
Inventors: 冉芳; 赵宗宁
Original assignee: Tieling normal college
Current assignee: Tieling normal college
Priority date: 2013-12-27
Filing date: 2013-12-27
Publication date: 2014-06-25
Anticipated expiration: 2023-12-27

Abstract

Provided is a parabola drawing tool. A first sliding block on a first channel is connected with a second channel perpendicular to the first channel, a drawing pen is arranged on the upper portion of the second sliding block on the second channel, a pen holder shaft is fixed to the axis of the inside of a cylinder of the drawing pen, a torsion spring is arranged on the pen holder shaft in a sleeved mode, the torsion spring is sleeved with a roller, one end of the torsion spring is connected with the pen holder shaft, the other end of the torsion spring is connected with the roller, two strands of multiple winding ropes are wound on the roller and extend out from a rope outlet hole in the cylindrical wall of a pen holder, the outer end of one strand of the ropes is connected with the first sliding block, the outer end of the other strand of the ropes is connected with a point fixing nail, the circumferential portion of the lower end of the pen holder cylinder is provided with a pen clamping cylinder, the axis of the pen clamping cylinder and the axis of the pen holder cylinder are parallel, and the axis of the pen clamping cylinder penetrates through the rope outlet hole. When the parabola drawing tool is used, a person holds the drawing pen with a hand to enable the first sliding block to slide along the first channel and the second sliding block to slide along the second channel, the two strands of the multiple winding ropes are pulled out by overcoming elasticity of the torsion spring, the lengths of the two strands of the multiple winding ropes are the same, and a parabola can be drawn on a drawing board or a blackboard during sliding.

Description

Parabola drawing tool

Technical field

The utility model relates to a kind of drafting or presentation tool of conic section, particularly a kind of parabolical drafting or presentation tool.

Background technology

Conic section has circle, ellipse, hyperbola and parabola.These conic sections have respectively its definition, according to different conic section definition, can produce the drawing tool of some conic sections, also can demonstrate the process of drawing conic section according to definition with drawing tool, the drawing tool of conic section also can be used as the presentation tool in teaching.As produced according to the definition of circle " the interior track that equals the point of fixed length to the distance of a fixed point of plane " instrument---the compasses of drawing or demonstrating circle; " in plane, equaling apart from sum the track of the point of definite value to two fixed points " according to oval definition can produce drafting or demonstrate oval instrument---the rope between two fixed points and two fixed points; Can produce and draw or demonstrate hyp instrument according to hyp definition " absolute value of the interior difference to two fixed points distances of plane equals the track of the point of definite value "---not isometric slide fastener between two fixed points and two fixed points.

In practical application and teaching, there are circle, oval and hyp drawing tool or presentation tool.Parabolical definition is " in plane to the distance of a fixed point with to the track of the equidistant point of a boning out ", in prior art, there is no parabolical drawing tool or presentation tool.

Summary of the invention

The purpose of this utility model is in order to overcome above-mentioned deficiency, proposes a kind of Parabola drawing tool.

The utility model is realized with the following method.

Parabola drawing tool has the first slideway, on the first slideway, there is the first slide block, the first slide block is connected with second slideway vertical with the first slideway, on the second slideway, there is the second slide block, there is drawing pen the top of the second slide block, drawing pen has cylindrical shape penholder, there is the penholder axle being fixed in cylinder at axis place in penholder cylinder, on penholder axle in penholder cylinder, cover has torsion spring, torsion spring outside cover in penholder cylinder has cylinder, one end of torsion spring is connected on penholder axle, the other end of torsion spring is connected on cylinder, on cylinder, be wound with bifilar and wiring, penholder cylindrical wall has rope hole, bifilar and wiring stretches out from the rope hole of penholder cylindrical wall, in bifilar and wiring, there is a strand outer end to be connected on the first slide block and vertical with the first slideway, the outer end of another strand is connected with fixed point nail, the pen clip cylinder that the circumference place of penholder cylinder lower end has axis to parallel with the axis of penholder cylinder, the axis of pen clip cylinder is by above-mentioned rope hole.

When use, in pen clip cylinder, clamp pencil or chalk, the first slideway and fixed point nail are fixed on drawing board or blackboard for education, hand-held drawing pen, allow the first slide block slide along the first slideway, allow the second slide block slide along the second slideway simultaneously, in cylindrical shape penholder due to drawing pen, there is the cylinder that is wound with bifilar and wiring, between cylinder and drum shaft, be connected with torsion spring, in the time of the first slide block and the slip of the second slide block, hand-held drawing pen, overcome the bifilar and wiring of elastic force pull-out of torsion spring, the strand being connected on the first slide block remains vertical with the first slideway, another strand is connected in fixed point and nails on, bifilar and wiring is the state of tightening, now bifilar and wiring is equal in length, in slip, can on drawing board or blackboard, draw out " to the distance of a fixed point with to the track of the equidistant point of straight line ", the track of this point is parabola.After drafting finishes, the elastic force that torsion spring resets can be wound into bifilar and wiring on cylinder again.

Below in conjunction with accompanying drawing, the utility model is further described.

Brief description of the drawings

Fig. 1 cuts open schematic diagram according to the master of a kind of Parabola drawing tool of scheme of the invention proposition of the present utility model depending on office;

The schematic top plan view of Fig. 2 Fig. 1;

Fig. 3 is that the master of drawing pen cuts open enlarged diagram depending on office;

Fig. 4 is that schematic diagram cuts open in the office of overlooking of Fig. 3.

Detailed description of the invention

In Fig. 1 ~ Fig. 4, Parabola drawing tool has the first slideway 1, on the first slideway, there is the first slide block 2, the first slide block is connected with second slideway 3 vertical with the first slideway, on the second slideway, there is the second slide block 4, there is drawing pen 5 top of the second slide block, drawing pen has cylindrical shape penholder 6, there is the penholder axle 7 being fixed in cylinder at axis place in penholder cylinder, on penholder axle in penholder cylinder, cover has torsion spring 8, torsion spring outside cover in penholder cylinder has cylinder 9, one end of torsion spring is connected on penholder axle, the other end of torsion spring is connected on cylinder, on cylinder, be wound with bifilar and

wiring

10, 11, penholder cylindrical wall has rope hole 12, bifilar and wiring stretches out from the rope hole of penholder cylindrical wall, in bifilar and wiring, there are strand 10 outer ends to be connected on the first slide block and vertical with the first slideway, the outer end of another strand 11 is connected with fixed point nail 13, the pen clip cylinder 14 that the circumference place of penholder cylinder lower end has axis to parallel with the axis of penholder cylinder, the axis of pen clip cylinder is by above-mentioned rope hole.

Claims

1. a Parabola drawing tool, it is characterized in that: have the first slideway, on the first slideway, there is the first slide block, the first slide block is connected with second slideway vertical with the first slideway, on the second slideway, there is the second slide block, there is drawing pen the top of the second slide block, drawing pen has cylindrical shape penholder, there is the penholder axle being fixed in cylinder at axis place in penholder cylinder, on penholder axle in penholder cylinder, cover has torsion spring, torsion spring outside cover in penholder cylinder has cylinder, one end of torsion spring is connected on penholder axle, the other end of torsion spring is connected on cylinder, on cylinder, be wound with bifilar and wiring, penholder cylindrical wall has rope hole, bifilar and wiring stretches out from the rope hole of penholder cylindrical wall, in bifilar and wiring, there is a strand outer end to be connected on the first slide block and vertical with the first slideway, the outer end of another strand is connected with fixed point nail, the pen clip cylinder that the circumference place of penholder cylinder lower end has axis to parallel with the axis of penholder cylinder, the axis of pen clip cylinder is by above-mentioned rope hole.