CN204820801U

CN204820801U - Instrument is drawn to helix

Info

Publication number: CN204820801U
Application number: CN201520581498.5U
Authority: CN
Inventors: 刘金黎; 张泽柏; 宋一整
Original assignee: Individual
Current assignee: Tian Keyi
Priority date: 2015-08-05
Filing date: 2015-08-05
Publication date: 2015-12-02
Anticipated expiration: 2025-08-05

Abstract

The utility model provides an instrument is drawn to helix, includes setting -out dish and dead lever, is equipped with the through -hole at the middle part of setting -out dish, the setting -out dish passes through this through -hole swing joint and on the dead lever, is equipped with a breach on the direction of radius of setting -out dish be equipped with the notch in the dead lever, and breach and notch are corresponding, still include solidus post and cotton thread, the one end fixed connection of cotton thread has an activity ring at the other one end fixed connection of cotton thread on the solidus post, have a detail pen at activity intra -annular swing joint, the activity of solidus post straight line is in the notch, the utility model provides an instrument of drawing helix that can be very convenient.

Description

A kind of helix drawing tool

Technical field

The utility model relates to a kind of teaching aid, particularly a kind of helix drawing tool.

Background technology

It is utilize compasses to draw that general teacher draws spiral of Archimedes on blackboard, and this method utilizing compasses to draw, constantly must adjust the radius of compasses, and to obtain the circular arc of different radii, this method for drafting is cumbersome.

Summary of the invention

The technical problems to be solved in the utility model is to provide a kind of instrument can drawing helix very easily.

In order to solve the problem, the technical solution of the utility model is: a kind of helix drawing tool, comprise tosecan and fixed bar, through hole is provided with at the middle part of tosecan, described tosecan is movably connected on fixed bar by this through hole, the radial direction of tosecan is provided with a breach, in described fixed bar, be provided with notch, and breach is corresponding with notch; Also comprise solidus post, cotton thread and loose collar, the two ends of described cotton thread are fixedly connected on solidus post and loose collar respectively, in loose collar, be mounted with detail pen, and the line activities of described solidus post is in notch.

The cross section of described fixed bar is square, is connected with magnet at the end winding support of fixed bar.

Described tosecan is provided with multiple setting-out groove.

Described detail pen being provided with multiple groove for preventing loose collar from sliding up and down, in one end of detail pen, being provided with chalk hole.

Technique effect of the present utility model is: utilize the magnet bottom setting-out bar can be fixed on blackboard by tosecan, when needing picture helix, only needs hand-held detail pen; While by cotton thread around in setting-out groove, while with detail pen setting-out on blackboard, due in the process of coiling, cotton thread is in continuous shortening, so the line drawn is helix, and then also can draw out helix very easily without the need to using compasses.The effect that tosecan is provided with multiple setting-out groove is to draw the helix varied in size.

Accompanying drawing explanation

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

Fig. 1 is front view of the present utility model,

Fig. 2 is the front view of the utility model tosecan,

Fig. 3 is the side view of the utility model tosecan,

Fig. 4 is the front view of the utility model fixed bar,

Fig. 5 is the top view of the utility model fixed bar,

Fig. 6 is the front view of the utility model detail pen,

Fig. 7 is the partial enlarged drawing of the utility model detail pen after loading onto chalk,

Fig. 8 is the perspective view of the utility model solidus post, cotton thread and loose collar.

Fig. 9 is the utility model perspective view in use.

Detailed description of the invention

As shown in Fig. 1 to 8, a kind of helix drawing tool, comprise tosecan 2 and fixed bar 1, through hole 22 is provided with at the middle part of tosecan 2, described tosecan 2 is movably connected on fixed bar 1 by this through hole 22, the radial direction of tosecan 2 is provided with a breach 21, described fixed bar 1 is provided with notch 11, and breach 21 and notch 11 corresponding; Also comprise solidus post 8, cotton thread 3 and loose collar 7, one end of described cotton thread 3 is fixedly connected in solidus post 8, is fixedly connected with on loose collar 7, is mounted with detail pen 4 in loose collar 7 in other one end of cotton thread 3, and the line activities of described solidus post 8 is in notch 11.

As shown in Figures 4 and 5, the cross section of described fixed bar 1 is square, is connected with magnet 6 at the end winding support of fixed bar 1.

As shown in Figures 2 and 3, described tosecan 2 is provided with multiple setting-out groove 23, conveniently draws the helix of different-diameter, the diameter of each setting-out groove 23 can be set to different sizes.

As shown in Figures 6 and 7, described detail pen 4 being provided with multiple groove 42 for preventing loose collar 7 from sliding up and down, in one end of detail pen 4, being provided with chalk hole 41.

In preferred version, as shown in figs. 1 and 8, in order in the process of setting-out, pen can be more stable, so two tosecans 2, solidus post 8, cotton thread 3 and loose collar 7 can be installed on fixed bar 1, when needing picture helix, two loose collars 7 can be enclosed within a detail pen 4 and draw helix, like this can draw helix time detail pen 4 more reliable.

Using method, as shown in Figure 9, magnet 6 is utilized first to inhale on blackboard by fixed bar 1, then tosecan 2 is loaded onto, and in the process of assembling, ensure that on breach 21 and fixed bar 1, notch 11 is corresponding on tosecan 2, then in notch 11, solidus post 8 is loaded onto, loose collar 7 being enclosed within the groove 42 on detail pen 4, chalk 9 is inserted in chalk hole 41 simultaneously on detail pen 4, after ready, fixed bar 1 is pinned with left hand, the right hand takes detail pen 4, and by stretching for cotton thread 3, according to the size of helix, select corresponding setting-out groove 23, coiling on tosecan 2 backmost, while with chalk 9 setting-out, the line finally drawn has been exactly helix.

Claims

1. a helix drawing tool, it is characterized in that: comprise tosecan (2) and fixed bar (1), through hole (22) is provided with at the middle part of tosecan (2), described tosecan (2) is movably connected on fixed bar (1) by this through hole (22), the radial direction of tosecan (2) is provided with a breach (21), in described fixed bar (1), be provided with notch (11), described breach (21) and notch (11) corresponding; Also comprise solidus post (8), cotton thread (3) and loose collar (7), the two ends of described cotton thread (3) are fixedly connected on solidus post (8) and loose collar (7) respectively, in loose collar (7), be mounted with detail pen (4), the line activities of described solidus post (8) is in notch (11).

2. a kind of helix drawing tool according to claim 1, is characterized in that: the cross section of described fixed bar (1) is square, is connected with magnet (6) at the end winding support of fixed bar (1).

3. a kind of helix drawing tool according to claim 1, is characterized in that: on described tosecan (2), be provided with multiple setting-out groove (23).

4. a kind of helix drawing tool according to claim 1, is characterized in that: on described detail pen (4), being provided with multiple groove (42) for preventing loose collar (7) from sliding up and down, being provided with chalk hole (41) in one end of detail pen (4).