CN207579406U

CN207579406U - A kind of angle drawing device

Info

Publication number: CN207579406U
Application number: CN201720757544.1U
Authority: CN
Inventors: 梁泰山
Original assignee: Individual
Current assignee: Individual
Priority date: 2017-06-27
Filing date: 2017-06-27
Publication date: 2018-07-06
Anticipated expiration: 2027-06-27

Abstract

The utility model discloses a kind of angle drawing device, including：First in ruler, second ruler, terminal pad and opposite side ruler；Described first in ruler and second top of ruler be fixed in terminal pad, the two intersection forms vertex, first in ruler and second ruler can be formed in plane in terminal pad and rotate around vertex；First side ruler is equipped with the first fixing card at its inner side edge, and second side ruler is equipped with the second fixing card at its inner side edge, described first fix snap into the distance on vertex snapped into the second fixation vertex distance it is equal；The opposite side ruler can be fixed on first in ruler and second on ruler, and length of the opposite side ruler between first fixing card and the second fixing card is adjustable through the first fixing card and the second fixing card；Described first in ruler, second ruler, be equipped with graduation mark on opposite side ruler.

Description

A kind of angle drawing device

Technical field

The utility model is related to a kind of angle drawing devices.

Background technology

Existing protractor is the structure of a halfround bar slice, and angle line is carved on semi arch.When drawing angle, one is first drawn directly Line using the center of circle of halfround bar slice as a fixed point of straight line, another fixed point is then taken on semi arch, finally uses ruler as required Son connects two fixed points, needs several steps.In addition, existing protractor can only be by drawing after known angle value The angle, and in practical application, it is that trigonometric function value is only provided in many cases, i.e., if using existing protractor and drawing angle Method needs to find out angle value according to the trigonometric function value first, draws angle according still further to aforementioned step later, on the one hand searches Angle value be unfavorable in time obtain as a result, on the other hand draw angle step it is various, cause it is existing picture angle when it is very inconvenient.

Utility model content

The purpose of this utility model is to provide a kind of angle drawing devices.

To achieve the above object, the utility model uses the following contents：

A kind of angle drawing device, including：First in ruler, second ruler, terminal pad and opposite side ruler；Described first in ruler and second One top of ruler is fixed in terminal pad, the two intersection formed vertex, first in ruler and second ruler can connection dish type It is rotated on into plane around vertex；First side ruler is equipped with the first fixing card at its inner side edge, and second side ruler is in it Side edge is equipped with the second fixing card, described first fix snap into the distance on vertex snapped into the second fixation vertex distance it is equal； The opposite side ruler can be fixed on first in ruler and second on ruler through the first fixing card and the second fixing card, and opposite side ruler this Length between one fixing card and the second fixing card is adjustable；Described first in ruler, second ruler, be equipped with scale on opposite side ruler Line, and the graduation mark of the opposite side ruler is to fix to snap into the distance length on vertex and grow to index as total scale using first.

Further, described first in ruler and/or second spirit bubble is provided on ruler.

Further, the angle drawing device further includes：Be arranged on first in ruler and/or second upper and lower ends of ruler magnet Stone.Magnetite setting is adsorbed for stablizing the angle drawing device when drawing angle in gusset to be painted.

Further, the angle drawing device further includes：The half-round compasses being arranged at terminal pad.

Further, described first in ruler, second material of ruler, terminal pad and opposite side ruler be wear-resistant material.

Further, it is additionally provided with vernier part on the opposite side ruler.

The utility model has the following advantages：

1st, the utility model is put forward for the first time using trigonometric function value as according to through simple conversion and obtains to the length of side, according to the length of side To draw angle.

2nd, the angle drawing device of the utility model can play function served as bridge between angle and trigonometric function value, can it is convenient, fast, It simply records, draw angle；The angle drawing device can quickly reflect the size of angle of departure, while be known that the trigonometric function value at angle； It can also reflect the half at the supplementary angle at an angle；Have the advantages that precision is high, size is small, strong applicability, widely used.

Description of the drawings

Specific embodiment of the present utility model is described in further detail below in conjunction with the accompanying drawings.

Fig. 1 is the structure diagram of the angle drawing device of the utility model.

Fig. 2 is the graduation mark distribution schematic diagram of the opposite side ruler of the angle drawing device of the utility model.

Specific embodiment

In order to illustrate more clearly of the utility model, the utility model is done further with reference to preferred embodiment It is bright.It will be appreciated by those skilled in the art that specifically described content is illustrative and be not restrictive below, it should not be with this Limit the scope of protection of the utility model.

Embodiment

When two angle sides at an angle are that 1 unit is long, the size at the angle and ratio (this to the length of side and angle side LTS θ, 0≤LTS θ≤2 are expressed as in text) it corresponds, it is possible to reflect the size at the angle to the length of side.As Fig. 1 gets the bid Go out, vertex O, the fixation stuck point on the first side ruler is A, and the fixation stuck point on the second side ruler is B.

According to the cosine law：

1、OA=OB；

2、

Correspondingly, any trigonometric function value at an angle can be converted into LTS θ, then directly with the utility model Angle drawing device can reflect the angle, and then draw the angle.

In the present embodiment, the method for the picture angle is the cosine value of the known angle θ to be painted, is included the following steps：

First, the length for setting two angle sides at the angle is that 1 unit is long,

Secondly, with known cosine value according to formula 1) LTS θ are calculated, further in accordance with LTS θ according to formula 2) calculate To the length to the length of side；Wherein, when LTS θ assume that the apex angle that the angle is waist for the isosceles triangle of 1 unit length to the length of side Length and waist length ratio：

1、

2、

Finally, the length according to two angle sides, the length to the length of side, draw the angle.

As shown in Figure 1, being the structure diagram of the angle drawing device of the utility model, which includes：First side ruler 1, Two side rulers 2, terminal pad 3, the first fixing card 4, the second fixing card 5, opposite side ruler 6, magnetite 7, spirit bubble 8 and half-round compasses 9.First At ruler 1 and second, a top of ruler 2 is fixed in terminal pad 3, and the two intersection forms vertex O, the first side ruler 1 and second Side ruler 2 can be formed in terminal pad 3 in plane to be rotated around vertex.First is equipped with graduation mark, vertex O at ruler 1 and second on ruler 2 For graduation mark scale initiating terminal 0.First side ruler 1 is equipped with the first fixing card 4 at its inner side edge, and the second side ruler 2 is in its inner side edge Place is equipped with the second fixing card 5.The center of circle of first fixing card 4 is A points, and the distance to vertex O is OA.The center of circle of second fixing card 5 For B points, the distance to vertex O is OB.OA is equal with OB.One side of opposite side ruler 6 passes through the first fixing card 4 and the second fixing card 5 The center of circle be fixed on first at ruler 1 and second between ruler 2, and opposite side ruler 6 is between the first fixing card 4 and the second fixing card 5 The i.e. AB of distance is adjustable.Graduation mark also is provided on opposite side ruler 6, as shown in Figure 2, the graduation mark of opposite side ruler 6 is with the first fixing card Length to the distance OA on vertex is grown for total scale come according to being indexed (can be 10 parts, 100 parts or more), scale Line initiating terminal 0 is center of circle A.Generally, first in ruler 1, second graduation mark of ruler 2 total length be 500mm or 1000mm.Opposite side Vernier part 10 is equipped with referring also to existing vernier caliper structure on ruler 6, for pin-point reading.First in ruler 1 and second while The upper and lower ends of ruler 2 are respectively arranged with magnetite 7, to fix the angle drawing device.Spirit bubble 8 is used for adjusting level.Half-round compasses 9 is set It puts at terminal pad 3, is Demountable.

Must be long as 1 unit using a certain length using each angle drawing device that aforementioned picture angle method designs, picture angle each in this way The number of degrees of device can be general.

The angle drawing device of the utility model can play function served as bridge between angle and trigonometric function value, can be convenient, fast, simple It singly records, draw angle.

Obviously, above-described embodiment of the utility model is only intended to clearly illustrate the utility model example, and It is not the restriction to the embodiment of the utility model, for those of ordinary skill in the art, in above description On the basis of can also make other variations or changes in different ways, all embodiments can not be exhaustive here, It is every to belong to obvious changes or variations that the technical solution of the utility model is extended out still in the utility model The row of protection domain.

Claims

1. a kind of angle drawing device, which is characterized in that including：First in ruler, second ruler, terminal pad and opposite side ruler；First side One top of ruler and the second side ruler is fixed in terminal pad, and the two intersection forms vertex, and first in ruler and second, ruler can It is formed in plane in terminal pad and is rotated around vertex；First side ruler at its inner side edge be equipped with the first fixing card, described second Side ruler is equipped with the second fixing card at its inner side edge, and first fixation snaps into the distance on vertex and the second fixation snaps into vertex Apart from equal；The opposite side ruler can be fixed on first in ruler and second on ruler, and right through the first fixing card and the second fixing card Length of the side ruler between first fixing card and the second fixing card is adjustable；Described first in ruler, second ruler, on opposite side ruler Equipped with graduation mark.

2. a kind of angle drawing device according to claim 1, which is characterized in that the graduation mark of the opposite side ruler is fixed with first The distance length for snapping into vertex is grown to index for total scale.

3. a kind of angle drawing device according to claim 1, which is characterized in that described first sets in ruler and/or second on ruler It is equipped with spirit bubble.

4. a kind of angle drawing device according to claim 1, which is characterized in that the angle drawing device further includes：It is arranged on the first side The magnetite of the upper and lower ends of ruler and/or the second side ruler.

5. a kind of angle drawing device according to claim 1, which is characterized in that the angle drawing device further includes：It is arranged on terminal pad The half-round compasses at place.

6. a kind of angle drawing device according to claim 1, which is characterized in that described first in ruler, second ruler, terminal pad and The material of opposite side ruler is wear-resistant material.

7. a kind of angle drawing device according to claim 1, which is characterized in that be additionally provided with vernier part on the opposite side ruler.