CN211918206U

CN211918206U - Junior high school mathematics drawing board

Info

Publication number: CN211918206U
Application number: CN201922322772.8U
Authority: CN
Inventors: 王玉芹
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-12-23
Filing date: 2019-12-23
Publication date: 2020-11-13
Anticipated expiration: 2029-12-23

Abstract

The utility model relates to a learning tools field. The utility model discloses a junior middle school mathematics drawing board, including main scale, vice chi and connecting axle, terminal surface afterbody intermediate position is equipped with the mounting hole under the main scale, vice chi up end afterbody intermediate position is equipped with the shoulder hole, the terminal surface is equipped with a slip face under the main scale, the connecting axle passes the shoulder hole will vice chi is installed among the mounting hole, the main scale with vice chi constitutes to rotate to be connected just vice chi up end with the slip face contact, terminal surface and the coincidence of vice chi lower extreme face under the main scale. The utility model provides a pair of junior high school mathematics drawing board can make junior high school student can more swift accurate completion most simple and easy curvilinear drawing, has both saved the time, has improved the precision again, has saved the preparation time of solving the mathematics subject by a wide margin, has improved learning efficiency.

Description

Junior high school mathematics drawing board

Technical Field

The utility model relates to a learning tools field more specifically relates to a junior middle school mathematics drawing board.

Background

At present, in the process of junior middle school mathematics learning, the requirement on drawing capacity is strict, besides necessary ruler drawing, polygons and internal and external circles thereof, quadratic function curves and inverse proportion function curves are involved, most students select rough manual drawing due to time reasons in ordinary training without using auxiliary appliances such as rulers, protractors and the like, but visual errors can be caused due to weak drawing capacity of junior middle school students and the fact that the drawn simple curves are not standard enough; but if the standard drawing is too time-consuming, the learning efficiency is reduced; the useless function of common multi-functional mathematics drawing board on the market is too much to cause occupation space too big, has reduced space utilization.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a junior middle school mathematics drawing board aims at solving at least and has the technical problem of drawing function curve difficulty fast among the prior art.

In order to realize the above-mentioned purpose, the utility model discloses an aspect's technical scheme provides a junior high school mathematics drawing board, including main scale, vice chi and connecting axle, terminal surface afterbody intermediate position is equipped with the mounting hole under the main scale, vice chi up end afterbody intermediate position is equipped with the shoulder hole, terminal surface is equipped with a spigot under the main scale, the connecting axle passes the shoulder hole will vice chi is installed among the mounting hole, the main scale with vice chi constitutes to rotate to be connected just vice chi up end with spigot contact, the main scale down the terminal surface with terminal surface coincidence under the vice chi.

The junior middle school mathematics drawing provided by the technical scheme of the utility model is specially designed for junior middle school students, can rapidly and accurately draw the most common function curves and common polygon curves in junior middle school mathematics, and also has the functions of a ruler and a protractor, all the functions can be frequently used for junior middle school students, and the space utilization rate is high; meanwhile, the adoption of the rotary shrinkage mode can also reduce the occupation of space when the drawing machine is not used, accelerate the drawing speed and improve the learning efficiency.

Additionally, the utility model discloses above-mentioned technical scheme provides a junior middle school mathematics is drawn and is still had following technical characteristic:

as a preferred scheme of the utility model, vice chi up end afterbody is equipped with an arc boss, main scale down end afterbody the mounting hole both sides are equipped with a fixed orifices respectively, vice chi passes through arc boss and arbitrary one the fixed orifices is fixed on the main scale.

As another preferred scheme of the utility model, main scale up end head is equipped with an inclined plane one up end is equipped with scale one.

As another preferred embodiment of the present invention, the main scale is provided with a triangular curve, a regular pentagon curve, and a regular hexagon curve, the regular triangle curve includes a regular triangle, a 345 right triangle and their inner and outer circles, the regular pentagon curve includes a regular pentagon and its inner and outer circles, the regular hexagon curve includes a regular hexagon and its inner and outer circles, the triangular curve the regular pentagon curve the regular hexagon curve is all set in the form of a through hole at the middle position of the main scale.

As a further preferred aspect of the present invention, the auxiliary scale is provided with a ruler portion, a protractor portion and a function curve portion, the ruler portion is provided on the head of the upper end face of the auxiliary scale, the protractor portion is provided on the left of the upper end face of the auxiliary scale, and the function curve portion is provided on the right of the upper end face of the auxiliary scale.

As another preferable scheme of the utility model, the ruler part comprises an inclined plane and a second graduated scale, and the second graduated scale is positioned on the upper end surface of the inclined plane; the protractor part comprises a protractor and a semicircular hole, and the semicircular hole and the circle center of the protractor are located at the same position.

Compared with the prior art, the beneficial effects of the utility model reside in that:

according to the device, the device can be rotated and folded when not in use, so that the storage space is saved; the drawing of the simple function that the mathematics is commonly used in junior high school except that the ruler drawing is accomplished, has reduced the drawing time, and it is more accurate to compare manual drawing, makes the student can solve some problems on the function curve of standard, has the profile curve of polygon and inside and outside circle commonly used especially, has greatly reduced the preparation time before the solution problem, has improved learning efficiency.

Drawings

FIG. 1 is a rear view showing the connection of the present invention;

FIG. 2 is a side view of the present invention showing a slide surface;

FIG. 3 is a front view of the present invention;

FIG. 4 is an enlarged cross-sectional view of a portion of the connection;

FIG. 5 is a cross-sectional view of the main scale attachment portion;

FIG. 6 is a cross-sectional view of the attachment portion of the secondary rule;

fig. 7 is an isometric view of the secondary connection portion and the arcuate boss shown.

Wherein, the correspondence between the reference numbers and the part names in fig. 1 to 6 is:

the measuring tool comprises a main scale 1, a first graduated scale 11, a triangular curve 12, a regular pentagonal curve 13, a regular hexagonal curve 14, a first inclined plane 15, a mounting hole 16, a fixing hole 17, a second auxiliary scale 2, a stepped hole 21, an arc-shaped boss 22, a straight scale portion 23, a second inclined plane 231, a second graduated scale 232, a protractor portion 24, a protractor 241, a semicircular hole 242, a function portion 25, a quadratic equation curve 251, a third graduated scale 252, a sinusoidal curve 253, an inverse proportion function curve 254 and a connecting shaft 3.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more clearly understood, the present invention will be described in further detail with reference to the accompanying drawings and detailed description. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

A junior middle school mathematics drawing board according to some embodiments of the present invention is described below with reference to fig. 1 to 6.

As shown in fig. 1-3, according to some embodiments of the present invention, a drawing board for mathematics in junior middle school is provided, which includes a main ruler 1, an auxiliary ruler 2 and a connecting shaft 3.

Wherein, the middle position of the tail part of the lower end surface of the main ruler 1 is provided with a mounting hole 16, the middle position of the tail part of the upper end surface of the auxiliary ruler 2 is provided with a stepped hole 21, and the lower end surface of the main ruler 1 is provided with a sliding surface 18.

Furthermore, the connecting shaft 3 passes through the stepped hole 21 to install the auxiliary ruler 2 in the mounting hole 16, the main ruler 1 and the auxiliary ruler 2 form a rotating connection, the upper end face of the auxiliary ruler 2 is in contact with the sliding surface 18, the lower end face of the auxiliary ruler 2 is overlapped with the lower end face of the main ruler 1, the sliding surface 18 is matched with the two inclined surfaces 231 to provide a buffer effect for the mutual rotation between the main ruler 1 and the auxiliary ruler 2, the main ruler 1 and the rotating shaft 3 are small in moving strength and low in material requirement, the most common polyvinyl chloride (PVC) materials can be used, the auxiliary ruler 2 needs to rotate back and forth, and the elastic deformation is slight in the rotation process, so that a material with good toughness and wear resistance, such as a polycarbonate material (PC), is selected.

As shown in fig. 5-7, the tail of the upper end surface of the auxiliary ruler 2 is provided with an arc-shaped boss 22, two sides of the mounting hole 16 of the tail of the lower end surface of the main ruler 1 are respectively provided with a fixing hole 17, and the auxiliary ruler 2 is fixed on the main ruler 1 through the arc-shaped boss 22 and any one of the fixing holes 17. No matter be in closed condition or opening condition, main scale 1 and vice chi 2 can all be stable fixed together, even the live time overlength leads to connecting axle 3 not hard up, also can through fixed orifices 17 with arc boss 22 is fixed, and this setting can make the utility model discloses main scale 1 can not rotate easily with vice chi 2 in the use, has increased the stability of device.

As shown in fig. 3, the head of the upper end face of the main scale 1 is provided with a first inclined plane 15, and the upper end face of the first inclined plane 15 is provided with a first graduated scale 11; the main scale 1 is provided with a triangular curve 12, a regular pentagon curve 13 and a regular hexagon curve 14, the triangular curve 12 comprises a regular triangle, 345 a right triangle and inner and outer circles thereof, the regular pentagon curve 13 comprises a regular pentagon and inner and outer circles thereof, the regular hexagon curve 14 comprises a regular hexagon and inner and outer circles thereof, and the triangular curve 12, the regular pentagon curve 13 and the regular hexagon curve 14 are arranged in the middle of the main scale 1 in a through hole mode. The first inclined plane 15 reduces the refraction of light rays, so that the scales can be more accurate; the simple curve can be drawn quickly and accurately by the arrangement of the polygonal curve, the drawing of compasses and a ruler by students is not needed, the waste of time is reduced, and the learning efficiency is improved.

As shown in fig. 3, the sub ruler 2 is provided with a straight edge portion 23, a protractor portion 24, and a function curve portion 25, the straight edge portion 23 being provided at the head of the upper end face of the sub ruler 2, the protractor portion 24 being provided on the left side of the upper end face of the sub ruler 2, and the function curve portion 25 being provided on the right side of the upper end face of the sub ruler 2. The straight part 23 comprises a second inclined plane 231 and a second graduated scale 232, and the second graduated scale 232 is positioned on the upper end surface of the second inclined plane 231; the protractor section 24 includes a protractor 241 and a semi-circular hole 242, and the semi-circular hole 242 is located at the same position as the center of the protractor 241. Protractor 241 establishes together with the ruler can be more convenient the measurement or the drawing of completion angle, need not to prepare the protractor alone, semicircle orifice 242 not only can use more conveniently, can also reduce the material consumption of advanced material, and scale two 232 can use with the cooperation of other functions of using vice chi 2, need not to make a round trip to change main scale 1 and vice chi 2, can also not influence the use of device under the unexpected circumstances of damaging of scale one 11 of main scale 1. The function curve part 25 comprises a quadratic curve 251, a sine curve 253 and an inverse proportion function curve 254, wherein the inner layer of the quadratic curve 251 is y-x²Curve, outer layer is y ═ (x/2)²A third graduated scale 252 in the vertical direction is arranged on the inner side of the quadratic equation curve 251; the sine curve 253 is a function curve with y being sinx, the inverse proportion function curve 254 is a function curve with y being 1/x, and the quadratic equation curve 251, the sine function curve 253 and the inverse proportion function curve 254 are arranged on the right side of the upper end face of the secondary scale 2 in the form of through holes. The auxiliary ruler 2 is provided with a plurality of junior middle school mathematics common function curves, so that students can draw a standard curve at any time, a large amount of time can not be consumed like a standard drawing method, the curve is not too rough like a simple drawing method, the learning efficiency is further improved, the relation between x and y can be more accurately determined by the third graduated scale 252, the distance between the inner side curve origin and the outer side curve origin of the quadratic equation curve 251 is a fixed value, the starting point of the third graduated scale 252 is the origin of the inner side curve, and the scale of the starting point is the distance between the inner side curve origin and the outer side curve origin.

The utility model provides a device application method: if only a straight line needs to be drawn during use, the auxiliary scale 2 does not need to be separated from the main scale 1 in a rotating mode, only the first graduated scale 11 needs to be used, and if the first graduated scale 11 is damaged or the scales are unclear due to long use time, the second graduated scale 232 in the auxiliary scale 2 can be used for standby; if the drawing of the regular polygon and the inner and outer circles of the regular polygon needs to be completed, the auxiliary ruler 2 and the main ruler 1 are rotated and separated, the arc-shaped boss 22 is rotated to another fixing hole 17 from the current fixing hole 17, the upper end face of the main ruler 1 is contacted with paper, and the drawing is completed on the lower end face; if a common function curve or a measurement angle is needed, the head and the tail of the device can be interchanged, and the auxiliary ruler 2 is used for drawing the curve or measuring the angle.

In the present application, the terms "first", "second", "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance: the term "plurality" means two or more unless expressly limited otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

In the present invention, the terms "upper", "lower", "left", "right", "middle", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the designated device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting.

Claims

1. The utility model provides a junior middle school mathematics drawing board which characterized in that: including main scale (1), vice chi (2) and connecting axle (3), terminal surface afterbody intermediate position is equipped with mounting hole (16) under main scale (1), vice chi (2) up end afterbody intermediate position is equipped with shoulder hole (21), the terminal surface is equipped with a slip face (18) under main scale (1), connecting axle (3) are passed shoulder hole (21) will vice chi (2) are installed among mounting hole (16), main scale (1) with vice chi (2) constitute rotate connect just vice chi (2) up end with slip face (18) contact, terminal surface and the coincidence of vice chi (2) lower terminal surface under main scale (1).

2. A junior middle school mathematics drawing board as claimed in claim 1, wherein: the auxiliary ruler is characterized in that an arc-shaped boss (22) is arranged at the tail of the upper end face of the auxiliary ruler (2), a fixing hole (17) is formed in each of two sides of the mounting hole (16) at the tail of the lower end face of the main ruler (1), and the auxiliary ruler (2) is fixed to the lower end face of the main ruler (1) through the arc-shaped boss (22) and any one of the fixing holes (17).

3. A junior middle school mathematics drawing board as claimed in claim 1, wherein: the head of the upper end face of the main scale (1) is provided with a first inclined plane (15), and the first inclined plane (15) is provided with a first graduated scale (11).

4. A junior middle school mathematics drawing board as claimed in claim 1, wherein: still be equipped with triangle-shaped curve (12), regular pentagon curve (13), regular hexagon curve (14) on main scale (1), triangle-shaped curve (12) contain regular triangle, 345 right triangle and their inside and outside circles, regular pentagon curve (13) contain regular pentagon and inside and outside circle, regular hexagon curve (14) contain regular hexagon and inside and outside circle, triangle-shaped curve (12) regular pentagon curve (13) regular hexagon curve (14) are established with the form of through-hole main scale (1) intermediate position.

5. A junior middle school mathematics drawing board as claimed in claim 1, wherein: vice chi (2) are equipped with ruler portion (23), protractor part (24) and function curve part (25), ruler portion (23) are established vice chi (2) up end head, protractor part (24) are established vice chi (2) up end left side, function curve part (25) are established vice chi (2) up end right side.

6. A junior middle school mathematics drawing board as claimed in claim 5, wherein: the ruler part (23) comprises a second inclined plane (231) and a second graduated scale (232), and the second graduated scale (232) is positioned on the upper end face of the second inclined plane (231); the protractor part (24) comprises a protractor (241) and a semi-circular hole (242), wherein the semi-circular hole (242) is located at the same position as the circle center of the protractor (241).