CN214396155U

CN214396155U - Tool for drawing circle by mathematics

Info

Publication number: CN214396155U
Application number: CN202022755833.2U
Authority: CN
Inventors: 郭歌; 张卿汇
Original assignee: Henan Vocational College of Water Conservancy and Environment
Current assignee: Henan Vocational College of Water Conservancy and Environment
Priority date: 2020-11-25
Filing date: 2020-11-25
Publication date: 2021-10-15
Anticipated expiration: 2030-11-25

Abstract

The utility model discloses an instrument is used to mathematics circle of drawing, including the set casing, be provided with the adsorption equipment who fixes with the blackboard in the set casing, the upper end of set casing can be dismantled and be connected with the fixed plate, the last fixed surface of fixed plate has the sleeve, the sleeve internal rotation is connected with the pivot, the lateral surface of pivot is fixed with a solid fixed cylinder, be provided with telescopic activity section of thick bamboo in the solid fixed cylinder, the lateral surface of a solid fixed cylinder is provided with fixed scale, the lateral surface of an activity section of thick bamboo is provided with movable scale, the head downside of an activity section of thick bamboo is connected with the dead lever, the dead lever is connected with clamping device through the connection minor axis that sets up in its one side, this instrument is used to mathematics circle of drawing can be quick adjust out the required radius of drawing the circle, guarantee simultaneously and draw the stability of circle in-process, the operator's of being convenient for use.

Description

Tool for drawing circle by mathematics

Technical Field

The utility model relates to a teaching aid technical field specifically is a mathematics is painted and is used instrument.

Background

In the course of mathematical teaching, different geometric figures need to be slid out of the blackboard for drawing explanation, and common drawing tools include compasses, a set square, a straight ruler and the like.

The compasses are common tools for drawing circles, but in the practical drawing of a blackboard, the radius of the drawn circle needs to be determined on a measuring scale, the circle with the designated radius can be drawn through the compasses, the process is complicated, the operation is troublesome, and the fixed shaft of the compasses is easy to deviate when rotating, so that the circle drawing effect is influenced.

Disclosure of Invention

The to-be-solved technical problem of the utility model is to overcome current defect, provide a mathematics and draw instrument for circle, the required radius of drawing the circle of regulation that can be quick is guaranteed simultaneously and is drawn the stability of circle in-process, can effectively solve the problem in the background art.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a mathematics instrument of drawing a circle, includes the set casing, be provided with in the set casing with the fixed adsorption equipment of blackboard, the upper end of set casing can be dismantled and be connected with the fixed plate, the last fixed surface of fixed plate has the sleeve, the sleeve internal rotation is connected with the pivot, the lateral surface of pivot is fixed with fixed section of thick bamboo, be provided with telescopic activity section of thick bamboo in the fixed section of thick bamboo, the lateral surface of fixed section of thick bamboo is provided with fixed scale, the lateral surface of activity section of thick bamboo is provided with movable scale, the head downside of activity section of thick bamboo is connected with the dead lever, the dead lever is connected with clamping device through the connection minor axis that sets up in its one side.

As an optimized technical scheme of the utility model, the lower extreme of pivot is provided with the round platform, telescopic medial surface be provided with round platform matched with turn trough, the round platform rotates in the turn trough relatively.

As a preferred technical scheme of the utility model, two spouts have been seted up to the lateral surface symmetry of a fixed section of thick bamboo, and the one end outside face symmetry that the activity section of thick bamboo is located a fixed section of thick bamboo is provided with two first connecting blocks, and first connecting block passes the spout, and the lateral surface of pivot is provided with the second connecting block corresponding with first connecting block position, is provided with electric putter between first connecting block and the second connecting block.

As an optimized technical solution of the present invention, the sliding groove is a closed long circular sliding groove.

As an optimized technical solution of the present invention, the adsorption device is a magnet.

As an optimal technical scheme of the utility model, through locking bolt fixed connection between set casing and the fixed plate.

As a preferred technical scheme of the utility model, "0" end of activity scale is located the head of a movable section of thick bamboo.

As an optimized technical proposal of the utility model, the central axis of the clamping cylinder coincides with the head end surface line of the movable cylinder.

As an optimized technical scheme of the utility model, clamping device is for having elastic a pressing from both sides section of thick bamboo.

Compared with the prior art, the beneficial effects of the utility model are that: this instrument for circle is painted to mathematics compact structure, and reasonable design, occupation space is little during the use, the radius that the required circle is painted out in regulation that can be quick, normal running fit through sleeve and pivot, rotation when conveniently painting the circle, through setting up the telescopic activity section of thick bamboo, can be according to the corresponding size's of the size adjustment radius of the required circle of painting, be convenient for quick adjustment through setting up fixed scale and activity scale and paint the radius of circle, can carry out the centre gripping to dustless chalk or chalk through setting up clamping device and fix, adsorption equipment's setting can carry out the rigidity to this instrument, prevent to paint the deviation of circle in-process instrument, very big improvement convenience in use.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a front view of the present invention;

FIG. 3 is an enlarged schematic view at A in FIG. 2;

fig. 4 is a top view of the present invention.

In the figure: the locking mechanism comprises a fixed shell 1, a locking bolt 2, a sleeve 3, a rotating shaft 4, a circular truncated cone 5, a rotating groove 6, a fixed cylinder 7, a movable cylinder 8, a fixed scale 9, a movable scale 10, a sliding groove 11, a first connecting block 12, a second connecting block 13, an electric push rod 14, a fixed rod 15, a short connecting shaft 16, a clamping cylinder 17 and a fixing plate 18.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments (for convenience of description and understanding, the following description is made with the upper side of fig. 2 as the upper side). Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-4, the present invention provides a technical solution: a tool for drawing circles by mathematics comprises a fixed shell 1, an adsorption device fixed with a blackboard is arranged in the fixed shell 1, the adsorption device is a magnet, the fixed shell 1 is fixedly connected with a fixed plate 18 through a locking bolt 2, the fixed shell 1 and the fixed plate 18 are convenient to detach and mount, a sleeve 3 is fixed on the upper surface of the fixed plate 18, a rotating shaft 4 is rotatably connected with the sleeve 3, a round table 5 is arranged at the lower end of the rotating shaft 4, a rotating groove 6 matched with the round table 5 is formed in the inner side surface of the sleeve 3, the round table 5 rotates relatively in the rotating groove 6, through the rotating fit of the round table 5 and the rotating groove 6, the stability and the smoothness of the rotating process are improved, a fixed cylinder 7 is fixed on the outer side surface of the rotating shaft 4, two sliding grooves 11 are symmetrically formed in the outer side surface of the fixed cylinder 7, and two first connecting blocks 12 are symmetrically arranged on the outer side surface of one end, positioned in the fixed cylinder 7, of a movable cylinder 8, the first connecting block 12 passes through the sliding groove 11, the outer side surface of the rotating shaft 4 is provided with a second connecting block 13 corresponding to the first connecting block 12, an electric push rod 14 is arranged between the first connecting block 12 and the second connecting block 13, the sliding groove 11 is a closed long circular sliding groove, the movable cylinder 8 is prevented from sliding out of the fixed cylinder 7, the outer side surface of the fixed cylinder 7 is provided with a fixed scale 9, the outer side surface of the movable cylinder 8 is provided with a movable scale 10, the '0' end of the movable scale 10 is positioned at the head of the movable cylinder 8, the quick selection of the movable scale 10 is facilitated, the lower side of the head of the movable cylinder 8 is connected with a fixed rod 15, the fixed rod 15 is connected with a clamping device through a connecting short shaft 16 arranged at one side of the fixed rod, the clamping device is an elastic clamping cylinder 17, the central axis of the clamping cylinder 17 is coincident with the end face line of the head of the movable cylinder 8, the accuracy of circle drawing size is improved, and the tool for drawing circles is compact in structure, reasonable in design, occupation space is little during the use, and the radius that needs painted the circle is gone out in regulation that can be quick, prevents to paint the circular in-process instrument off tracking simultaneously, has improved the convenience in use greatly.

When in use: this instrument uses with the blackboard cooperation that has magnetic adsorption, fixes this device on the blackboard through the magnet adsorption earlier, carries out the centre gripping with dustless chalk or chalk through elastic clamp tube 17 and fixes, then through the flexible extension length of control electric putter 14 control movable tube 8 for movable scale 10 that movable tube 8 protrusion shows equals the radius that the circle was painted to the needs in addition fixed scale 9, and the circle is painted to manual rotation fixed tube 7 or movable tube 8 rotation completion at last.

The utility model can be operated conveniently, occupies little space when in use, and is convenient for operation and use; the radius that can quick regulation needs draw the circle has improved the convenience in use, prevents simultaneously to draw the deviation of circle in-process instrument, improves the stability of use.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a mathematics is painted instrument for circle, includes set casing (1), its characterized in that: be provided with the adsorption equipment who fixes with the blackboard in set casing (1), the upper end of set casing (1) can be dismantled and be connected with fixed plate (18), the last fixed surface of fixed plate (18) has sleeve (3), sleeve (3) internal rotation is connected with pivot (4), the lateral surface of pivot (4) is fixed with a fixed section of thick bamboo (7), be provided with telescopic activity section of thick bamboo (8) in the fixed section of thick bamboo (7), the lateral surface of a fixed section of thick bamboo (7) is provided with fixed scale (9), the lateral surface of an activity section of thick bamboo (8) is provided with activity scale (10), the head downside of an activity section of thick bamboo (8) is connected with dead lever (15), dead lever (15) are connected with clamping device through setting up connection minor axis (16) in its one side.

2. The tool for mathematically rounding as defined in claim 1, wherein: the lower end of the rotating shaft (4) is provided with a circular truncated cone (5), the inner side surface of the sleeve (3) is provided with a rotating groove (6) matched with the circular truncated cone (5), and the circular truncated cone (5) rotates in the rotating groove (6) relatively.

3. The tool for mathematically rounding as defined in claim 1, wherein: two sliding grooves (11) are symmetrically formed in the outer side face of the fixed cylinder (7), two first connecting blocks (12) are symmetrically arranged on the outer side face of one end, located in the fixed cylinder (7), of the movable cylinder (8), the first connecting blocks (12) penetrate through the sliding grooves (11), second connecting blocks (13) corresponding to the first connecting blocks (12) in position are arranged on the outer side face of the rotating shaft (4), and electric push rods (14) are arranged between the first connecting blocks (12) and the second connecting blocks (13).

4. A tool for mathematical circle-drawing as claimed in claim 3, wherein: the sliding groove (11) is a closed long circular sliding groove.

5. The tool for mathematically rounding as defined in claim 1, wherein: the adsorption device is a magnet.

6. The tool for mathematically rounding as defined in claim 1, wherein: the fixed shell (1) is fixedly connected with the fixed plate (18) through a locking bolt (2).

7. The tool for mathematically rounding as defined in claim 1, wherein: the '0' end of the movable scale (10) is positioned at the head of the movable cylinder (8).

8. The tool for mathematically rounding as defined in claim 1, wherein: the clamping device is an elastic clamping cylinder (17).

9. The tool for mathematically rounding as defined in claim 8, wherein: the central axis of the clamping cylinder (17) is superposed with the end face line of the head of the movable cylinder (8).