CN111775596A

CN111775596A - Arc drawing device for mathematical education

Info

Publication number: CN111775596A
Application number: CN202010626196.0A
Authority: CN
Inventors: 高秀侠
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-07-01
Filing date: 2020-07-01
Publication date: 2020-10-16

Abstract

The invention discloses an arc drawing device for mathematical education, which relates to the technical field of teaching and mainly solves the problem of inconvenience in drawing arcs or circles, and comprises a supporting leg, a rotating rod, a second correcting rod, a first connecting rod and a chalk fixing device, wherein the lower end of the supporting leg is provided with a supporting pad, the upper end of the supporting leg is rotatably connected with the left end of the rotating rod, a fixedly connected support is arranged above the left end of the rotating rod, a rotatably connected handle is arranged above the support, the top of the supporting leg is provided with a first scale area on the right side of the support, a sliding rail is arranged below the front side of the rotating rod, a first connecting rod is fixedly connected below a second sliding block, a first disc is in damping rotary connection with the chalk fixing device through the rotating rod arranged below the first disc, the arc drawing device can be well fixed on a blackboard surface, the fixing method is simple and reliable, the circle is convenient to draw, the radius is adjustable, and the arc lines with different radians are drawn simultaneously.

Description

Arc drawing device for mathematical education

Technical Field

The invention relates to the technical field of teaching, in particular to an arc line drawing device for mathematical teaching.

Background

Patent with application number "cn201720646857. x" and publication number "CN 207449473U" discloses an arc drawing device for mathematical education, which comprises a fixed main rod, a fixed hand-held ring, a plurality of blackboard suckers, a rotating sleeve, a drawing ruler, a scale mark, a plurality of chalk slots, an adjusting slider, an auxiliary chalk slot, a concave part, a sliding groove and a convex part; the chalk drawing ruler comprises a fixed main rod, a fixed handheld ring, a blackboard sucker, a drawing ruler, scale marks, a plurality of chalk slots and a plurality of rotating sleeves, wherein the fixed main rod is provided with a concave part; the sliding groove is formed in one side end face of the drawing ruler, the adjusting sliding block is embedded in the sliding groove in a matched mode and slides along the sliding groove, the auxiliary chalk inserting groove is connected with the adjusting sliding block, and the auxiliary chalk inserting groove is of a circular structure. The utility model discloses can assist and draw figures such as circular, pitch arc, the teaching of the mathematics of being convenient for, stability, accuracy are high, the simple operation.

However, this patent also has the following disadvantages:

1. the device is fixed by a plurality of suckers, and force is needed to remove the device, so that certain obstacles are brought to practical use;

2. an arc line of a certain angle cannot be drawn well.

Therefore, the arc drawing device for mathematical education is provided to solve the problems, and simultaneously, the drawing of circles or arcs is more convenient.

Disclosure of Invention

The invention aims to provide an arc drawing device for mathematical education, which aims to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme:

the utility model provides an arc drawing device for mathematical education, includes supporting leg, dwang, second correction rod, first connecting rod and chalk fixing device, the lower extreme of supporting leg is provided with the supporting pad, the upper end of supporting leg is rotated with the left end of dwang and is connected, the left end top of dwang is provided with fixed connection's support, and the top of support is provided with the handle of rotating the connection, the top of supporting leg is provided with first scale region in the right side of support, the front side below of dwang is provided with the slide rail, be provided with sliding connection's second slider on the slide rail, the below of second slider is provided with fixed connection's first connecting rod, first connecting rod and second connecting rod threaded connection, and second connecting rod below is provided with first disc, and first disc is connected through the dwang and the chalk fixing device damping rotation that the below is equipped with.

As a further scheme of the invention: the supporting pad is four prismatic table shapes, and inside is hollow structure, the supporting pad is made for the elasticity material, the inside of supporting leg is provided with the carriage release lever, and the carriage release lever runs through the bottom of supporting pad and extends to the inside of supporting pad, and the carriage release lever is provided with the block rubber in the inside below of supporting pad, and the block rubber can compress, the upper end of carriage release lever is provided with the horizontal pole, the left side of horizontal pole run through the supporting leg on be provided with the recess and with first slider fixed connection, in advance with the block rubber extrusion on the plane, the first slider of manual rebound drives the carriage release lever rebound to drive the block rubber rebound, thereby make the inside formation vacuum of supporting pad, because of the reason of the pressure differential, make the block rubber be fixed in on the plane, easy operation, it.

As a further scheme of the invention: the right side of slide rail is provided with the stopper, prevents that the second slider from droing.

As a further scheme of the invention: the upper and lower symmetry of second slider is provided with first correction stick and second correction stick, and first correction stick and second correction stick cooperate and correspond with the regional concrete scale of first scale.

As a further scheme of the invention: the inside of first connecting rod is provided with the internal thread chamber, and first connecting rod passes through the internal thread chamber and coincide with the upper end of second connecting rod, can adjust the length of first connecting rod and second connecting rod combination through rotating the second connecting rod, and the below of second connecting rod is fixed and is provided with first disc, and first disc passes through the dwang and is connected with chalk fixing device damping rotation.

As a further scheme of the invention: the chalk fixing device is cylindrical, the periphery of the bottom of the chalk fixing device is provided with the cylinders in threaded connection, the length of the cylinders entering the interior of the chalk fixing device in a spiral mode can be adjusted by rotating the cylinders, the cylinders are internally hollow, chalk is arranged inside the cylinders, and through rotating the cylinders, certain cylinders are made to be close to the blackboard surface compared with other cylinders, so that circular or arc lines can be drawn conveniently.

As a further scheme of the invention: still include hinge bar, protractor, second scale region, sleeve and recess, the one end of hinge bar is articulated with the support, the other end of hinge bar is articulated with the one end of protractor, is provided with the second scale region on the protractor, conveniently measures the angle, and the protractor runs through the sleeve and can slide relative to the sleeve, and the sleeve sets up on the dwang and can slide relative to the dwang, through adjusting the protractor to cooperate with hinge bar, sleeve, can realize drawing the pitch arc of certain angle.

Compared with the prior art, the invention has the beneficial effects that: the invention can be well fixed on the blackboard surface, has simple and reliable fixing method, convenient taking-off, convenient circle drawing, high precision and adjustable radius, and can draw arcs with different radians.

The first slide block is manually moved upwards to drive the movable rod to move upwards so as to drive the rubber block to move upwards, thereby forming vacuum in the supporting pad, fixing the rubber block on the plane due to pressure difference, having simple operation and reliable fixation, only moving the first slide block again to make the rubber block move downwards when the device needs to be taken down, the device can be taken down, the length of the cylinder which enters the chalk fixing device in a spiral mode can be adjusted by rotating the cylinder, the cylinder is of a hollow structure, the chalk is arranged in the cylinder, by rotating the cylinders, one of the cylinders is closer to the blackboard surface than the other cylinders, so that a circle or an arc line can be conveniently drawn, the protractor penetrates through the sleeve and can slide relative to the sleeve, the sleeve is arranged on the rotating rod and can slide relative to the rotating rod, by adjusting the protractor and matching with the hinged rod and the sleeve, the arc line with a certain angle can be drawn.

Drawings

Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention.

FIG. 2 is a schematic perspective view of a support leg and a groove of the present invention.

FIG. 3 is a schematic structural diagram of embodiment 2 of the present invention.

Fig. 4 is a schematic top view of the structure of embodiment 2.

In the figure: 1-supporting leg, 2-moving rod, 3-supporting pad, 4-rubber block, 5-first sliding block, 6-transverse rod, 7-support, 8-handle, 9-rotating rod, 10-first scale area, 11-sliding rail, 12-first correcting rod, 13-sliding block, 14-limiting block, 15-second correcting rod, 16-first connecting rod, 17-second connecting rod, 18-first disk, 19-chalk fixing device, 20-cylinder, 21-chalk, 22-rotating rod, 23-hinged rod, 24-protractor, 25-second scale area, 26-sleeve and 27-groove.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

Referring to fig. 1-2, in the embodiment of the present invention, an arc drawing device for mathematical education includes a support leg 1, a rotation rod 9, a second correction rod 15, a first connection rod 16 and a chalk fixing device 19, wherein a support pad 3 is disposed at a lower end of the support leg 1, the support pad 3 is in a quadrangular frustum shape, an inner portion of the support pad is a hollow structure, the support pad 3 is made of an elastic material, a moving rod 2 is disposed inside the support leg 1, the moving rod 2 penetrates through a bottom of the support pad 3 and extends into the support pad 3, a rubber block 4 is disposed below the inner portion of the support pad 3, the rubber block 4 can be compressed, a cross rod 6 is disposed at an upper end of the moving rod 2, a left side of the cross rod 6 penetrates through a groove 27 disposed on the support leg 1 and is fixedly connected with a first sliding block 5, the rubber block 4 is pressed on a plane in advance, the first, the movable rod 2 is driven to move upwards, so that the rubber block 4 is driven to move upwards, the vacuum is formed inside the supporting pad 3, the rubber block 4 is fixed on a plane due to the pressure difference, the operation is simple, the fixing is reliable, and the device can be taken down as long as the first sliding block 5 is moved again when the device needs to be taken down.

Furthermore, the upper end of the supporting leg 1 is rotatably connected with the left end of the rotating rod 9, a support 7 which is fixedly connected is arranged above the left end of the rotating rod 9, a handle 8 which is rotatably connected is arranged above the support 7, the article is conveniently taken up through the handle 8, the top of the supporting leg 1 is provided with a first scale area 10 at the right side of the support seat 7, the first scale area 10 is used for drawing the radius of a circle or an arc line, a slide rail 11 is arranged below the front side of the rotating rod 9, a limit block 14 is arranged on the right side of the slide rail 11 to prevent the second slide block 13 from falling off, the slide rail 11 is provided with a second slide block 13 in sliding connection, the second slide block 13 is provided with a first correcting rod 12 and a second correcting rod 15 in up-down symmetry, and the first correcting rod 12 and the second correcting rod 15 are matched with the specific scale of the first scale area 10 to determine the corresponding radius.

Further, a first connecting rod 16 fixedly connected is arranged below the second sliding block 13, an internal thread cavity is formed in the first connecting rod 16, the first connecting rod 16 is matched with the upper end of a second connecting rod 17 through the internal thread cavity, the length of the combination of the first connecting rod 16 and the second connecting rod 17 can be adjusted by rotating the second connecting rod 17, a first disc 18 is fixedly arranged below the second connecting rod 17, and the first disc 18 is in damping rotation connection with a chalk fixing device 19 through a rotating rod 22.

Furthermore, the chalk fixing device 19 is cylindrical, a plurality of cylinders 20 in threaded connection are arranged on the periphery of the bottom of the chalk fixing device 19, the length of the cylinders 20 entering the chalk fixing device 19 in a spiral mode can be adjusted by rotating the cylinders 20, the cylinders 20 are hollow, chalk 21 is arranged inside the cylinders 20, and one of the cylinders 20 is made to be close to a blackboard surface compared with the other cylinders 20 by rotating the cylinders 20, so that a circle or an arc line can be drawn conveniently.

Example 2

Referring to fig. 3 to 4, embodiment 2 differs from embodiment 1 in that the angle measuring device further includes a hinge rod 23, a protractor 24, a second scale area 25, a sleeve 26, and a groove 27, one end of the hinge rod 23 is hinged to the support 7, the other end of the hinge rod 23 is hinged to one end of the protractor 24, the protractor 24 is provided with the second scale area 25, so as to facilitate angle measurement, the protractor 24 penetrates through the sleeve 26 and can slide relative to the sleeve 26, the sleeve 26 is disposed on the rotation rod 9 and can slide relative to the rotation rod 9, and by adjusting the protractor 24 and matching the hinge rod 23 and the sleeve 26, an arc line with a certain angle can be drawn.

The working principle of the invention is as follows:

can adjust the inside length of drum 20 spiral entering chalk fixing device 19 through rotatory drum 20, the inside hollow structure that is of drum 20, the inside chalk 21 that is provided with of drum 20, through rotatory drum 20, make one of them drum 20 compare other drum 20 and be close to the blackboard face, conveniently draw circular or pitch arc, protractor 24 runs through sleeve 26 and can slide relative to sleeve 26, sleeve 26 sets up on dwang 9 and can slide relative to dwang 9, through adjusting protractor 24, and cooperate with hinge bar 23, sleeve 26, can realize drawing the pitch arc of certain angle.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. An arc drawing device for mathematical education comprises a supporting leg (1), a rotating rod (9), a second correcting rod (15), a first connecting rod (16) and a chalk fixing device (19), wherein a supporting pad (3) is arranged at the lower end of the supporting leg (1), the upper end of the supporting leg (1) is rotatably connected with the left end of the rotating rod (9), a support (7) in fixed connection is arranged above the left end of the rotating rod (9), a handle (8) in rotatable connection is arranged above the support (7), the arc drawing device is characterized in that a first scale area (10) is arranged at the top of the supporting leg (1) on the right side of the support (7), a sliding rail (11) is arranged below the front side of the rotating rod (9), a second sliding block (13) in sliding connection is arranged on the sliding rail (11), and a first connecting rod (16) in fixed connection is arranged below the second sliding block (13), the first connecting rod (16) is in threaded connection with the second connecting rod (17), a first disc (18) is arranged below the second connecting rod (17), and the first disc (18) is in damping rotary connection with the chalk fixing device (19) through a rotary rod (22) arranged below the first disc.

2. The arc drawing device for mathematical education as claimed in claim 1, wherein the supporting pad (3) is square frustum-shaped, the inside is hollow structure, the supporting pad (3) is made of elastic material, the inside of the supporting leg (1) is provided with the moving rod (2), the moving rod (2) penetrates through the bottom of the supporting pad (3) and extends to the inside of the supporting pad (3), the moving rod (2) is provided with a rubber block (4) below the inside of the supporting pad (3), the upper end of the moving rod (2) is provided with a cross rod (6), and the left side of the cross rod (6) penetrates through a groove (27) formed in the supporting leg (1) and is fixedly connected with the first sliding block (5).

3. An arc line drawing device for mathematics according to claim 2, characterized in that the right side of said slide rail (11) is provided with a stopper (14).

4. An arc line drawing device for mathematics as claimed in claim 3, wherein the second slider (13) is provided with a first correcting rod (12) and a second correcting rod (15) in upper and lower symmetry.

5. An arc line drawing device for mathematics teaching as claimed in claim 4, wherein the first connecting rod (16) is internally provided with an internal threaded cavity, the first connecting rod (16) is matched with the upper end of the second connecting rod (17) through the internal threaded cavity, when the second connecting rod (17) is rotated, the length of the combination of the first connecting rod (16) and the second connecting rod (17) is adjusted, and the first disk (18) is fixedly arranged below the second connecting rod (17).

6. The arc drawing device for mathematics teaching as claimed in claim 5, wherein said chalk holding means (19) is cylindrical, a plurality of cylinders (20) are screwed on the bottom periphery of the chalk holding means (19), the length of the cylinder (20) screwed into the chalk holding means (19) is adjusted when the cylinder (20) is rotated, the cylinder (20) is hollow, and the chalk (21) is placed inside the cylinder (20).

7. The arc drawing device for mathematical education as claimed in claim 6, further comprising a hinge rod (23), a protractor (24), a second scale region (25), a sleeve (26) and a groove (27), wherein one end of the hinge rod (23) is hinged to the support (7), the other end of the hinge rod (23) is hinged to one end of the protractor (24), the second scale region (25) is arranged on the protractor (24), the protractor (24) penetrates through the sleeve (26) which can slide relatively, and the sleeve (26) is arranged on the rotating rod (9) which can slide relatively.