CN204894891U

CN204894891U - Compasses set square

Info

Publication number: CN204894891U
Application number: CN201520632921.XU
Authority: CN
Inventors: 褚凯旦
Original assignee: Jiaxing Vocational and Technical College
Current assignee: Jiaxing Vocational and Technical College
Priority date: 2015-08-21
Filing date: 2015-08-21
Publication date: 2015-12-23
Anticipated expiration: 2025-08-21

Abstract

The utility model provides a compasses set square, it draws the accurate characteristics of circle to have simple structure, it is including set square (1) that has size scale (7), movable block (2), and chalk clip (3) of establishing on movable block (2), the right angle department of set square (1) is equipped with one through -hole (11), pilot pin (8) have been cup jointed in deep hole (11) activity, pilot pin (8) are equipped with spring bowling pin stopper (10), set square (1) is equipped with hole (9) that are used for pilot pin (8) location, a right -angle side movable sleeve of set square (1) is equipped with movable block (2), be equipped with on movable block (2) and observe hole (4) and locking bolt (6).

Description

A kind of triangular ruler of bow compasses

Technical field

The utility model relates to teaching aid field, is specifically a kind of triangular ruler of bow compasses.

Background technology

Math teacher explains figure for classmates on classroom of being everlasting, and is a teacher when drawing on blackboard, uses multiple types of tools, after often using compasses, then change set square, complete a figure and often will repeatedly replace repeatedly, very inconvenient.

The existing set square with calipers function at present, comprise a set square with length scale, an angle of set square arranges handle, the one side of the set square that handle is right is provided with right angle flange, the end winding support of flange arranges a pilot pin, this pilot pin is perpendicular to described flange, flange is also offered an elongated hole type slideway, an embedding slide block on slideway, slide block is fixedly installed a mobile picture pin, this moves picture pin perpendicular to described flange, although improve to some extent, but complex structure, easily distract the attention of the students, and weight increases a lot, carry inconvenience, therefore a kind of structure is designed simple, easy to manufacture, be easy to carry, draw the accurate triangular ruler of bow compasses of circle, considerable practicality is had for teaching aid field.

Utility model content

Technical problem to be solved in the utility model is, overcomes the defect of prior art, provide a kind of structure simple, be convenient for carrying, draw round accurate compasses set square.

For solving the problems of the technologies described above, the utility model proposes a kind of triangular ruler of bow compasses, it comprises with chalk clamp set on the set square of size scale, movable block and movable block, the right angle of set square is provided with a through hole, through hole movable sleeve is connected to pilot pin, and pilot pin is provided with spring ball plunger, and set square is provided with and coordinates with the hole of locating pilot pin with spring ball plunger, a right-angle side of set square is movably installed with movable block, and movable block is provided with peep hole and clamping screw.

After adopting said structure, compared with prior art, the utility model has the following advantages: can draw circle, can use again as set square, when teacher maps on blackboard, release pilot pin, be the center of circle with pilot pin, choose radius and fix portable plate, map with chalk, save the time exchanging drawing tools, and more accurate, this new structure has been simple, easy to manufacture, be easy to carry, draw circle accurately.

As improvement, pilot pin is L shape, and like this, pilot pin has a handles, more quick during use.

As improvement, the axis at pilot pin needle point place is 0 bit line of size scale, like this, directly can measure half price dimensionally and draw circle, makes picture circle more convenient.

As improvement, in peep hole, be provided with the transparent protective shield preventing impurity from entering, like this, avoid impurity and entered between set square and portable plate by peep hole, thus avoid wearing and tearing.

As improvement, size scale is depression scale, like this, decreases the wearing and tearing in actual use procedure, the practicality of increase.

Accompanying drawing explanation

Fig. 1 is the structural representation of a kind of triangular ruler of bow compasses of the utility model.

Fig. 2 is the structural representation of a kind of triangular ruler of bow compasses portable plate of the utility model.

Fig. 3 is the structural representation of a kind of triangular ruler of bow compasses pilot pin of the utility model

Shown in figure, 1, set square, 2, portable plate, 3, chalk clamp, 4, peep hole, 5, transparent protective shield, 6, tight a bolt, 7, size scale, 8, pilot pin, 9, locating hole, 10, spring ball plunger, 11, through hole.

Detailed description of the invention

Below the utility model is described in further detail:

The utility model it comprise with chalk clamp 3 set on the set square 1 of size scale 7, movable block 2 and movable block 2, the right angle of set square 1 is provided with a through hole 11, deep hole 11 movable sleeve is connected to pilot pin 8, pilot pin 8 is provided with spring ball plunger 10, set square 1 is provided with and coordinates with the hole 9 of locating pilot pin 8 with spring ball plunger 10, a right-angle side of set square 1 is movably installed with movable block 2, and movable block 2 is provided with peep hole 4 and clamping screw 6.

Pilot pin 8 set by right angle is L-shaped, end stretches out from through hole 11, be provided with the hole 9 that arranges, set square 1 surface with the use of spring ball plunger 10, locate faster, person easy to use, 0 line position of the axis position size scale 7 at the needle point place of pilot pin 8, directly can pass through size scale 7, measuring radius carries out picture circle, makes picture circle more convenient, save the time that teacher exchanges drawing tools for, improve efficiency of teaching.

Be provided with the transparent protective shield 5 preventing impurity from entering in peep hole 4, avoid impurity to enter movable block 2, avoid wearing and tearing, size scale 7, to lower recess, can reduce the wearing and tearing to size scale 7 in the middle of reality uses like this.

During use, spring ball plunger 10 is pressed downwards, with finger, pilot pin 8 afterbody is stretched out the part of set square 1 toward extrapolation, spring ball plunger 10 is made to advance to outside hole 9 from original hole 9, with this, pilot pin 8 is stretched out from through hole 11, be circular according to required picture radius of a circle size with pilot pin 8, by peep hole 4 from measuring radius size scale 7, to use on portable plate 2 tight a bolt and 6 to be fixed by portable plate 2, 3 clamping chalks in chalk clamp, can map, after using, with contrary direction, pilot pin 8 is return in through hole 11, the utility model, structure is simple, be convenient to assembling, be easy to carry, draw circle accurately.

The above is only better embodiment of the present utility model, therefore all equivalences done according to structure, feature and the principle described in present patent application scope change or modify, and are included in the utility model patent claim.

Claims

1. a triangular ruler of bow compasses, it comprises the set square (1) with size scale (7), movable block (2), and the upper set chalk clamp (3) of movable block (2), it is characterized in that, the right angle of set square (1) is provided with a through hole (11), through hole (11) movable sleeve is connected to pilot pin (8), pilot pin (8) is provided with spring ball plunger (10), set square (1) is provided with the hole (9) coordinated with spring ball plunger (10) to locate pilot pin (8), a right-angle side of set square (1) is movably installed with movable block (2), movable block (2) is provided with peep hole (4) and clamping screw (6).

2. a kind of triangular ruler of bow compasses (1) according to claim 1, is characterized in that, pilot pin (8) is L shape.

3. a kind of triangular ruler of bow compasses (1) according to claim 1, is characterized in that, the axis at the needle point place of pilot pin (8) is 0 bit line of size scale (7).

4. a kind of triangular ruler of bow compasses (1) according to claim 1, is characterized in that, is provided with the transparent protective shield (5) preventing impurity from entering in peep hole (4).

5. a kind of triangular ruler of bow compasses (1) according to claim 1, is characterized in that, size scale (7) is depression scale.