CN210896059U

CN210896059U - Addition and subtraction slide rule for mathematics of pupils

Info

Publication number: CN210896059U
Application number: CN201922148434.7U
Authority: CN
Inventors: 冯娟
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-12-04
Filing date: 2019-12-04
Publication date: 2020-06-30
Anticipated expiration: 2029-12-04

Abstract

The utility model discloses an addition and subtraction slide rule is used to pupil's mathematics, including ruler, set square the ruler openly upside is marked with the size scale, the set square openly upside is marked with the size scale for the subtraction, the set square openly downside is marked with the size scale for the addition, the top position of size scale sets up first fixed orifices for the addition, the subtraction sets up the second fixed orifices with size scale below position, the upper and lower both ends of ruler are provided with respectively extends the plate and extends the plate down, on extend the plate and extend and be equipped with guide rail hole and lower guide rail hole down on the plate respectively with extending down. This application addition and subtraction slide rule had both kept the effect that original ruler was measured, the setting-out, had increased simultaneously and has increased within ten simple addition and subtraction operation functions and be convenient for improve children's calculation speed, and the set square is connected through the snap-fastener with the ruler in addition, when need not calculating, can unpack the end button and detain the cap apart, lets set square and ruler separately use, simple structure, convenient and practical.

Description

Addition and subtraction slide rule for mathematics of pupils

Technical Field

The utility model relates to a primary school's stationery field specifically is an addition and subtraction slide rule is used to pupil's mathematics.

Background

In the process of primary school mathematics learning, the ruler is an indispensable learning tool, and the most commonly used ruler types comprise a ruler and a set square. At present, the types of rulers and set squares on the market are various, but most of rulers are single in use and have no more functions. The addition and subtraction operation is the most basic operation in mathematics learning, students in lower grades start to learn mathematics from addition and subtraction within 10, the learning process of the addition and subtraction operation is tedious and can be mastered through a large amount of exercises, and in order to enable students to calculate more intuitively and quickly and understand the method and the rule of the addition operation quickly, the addition and subtraction slide rule for the mathematics of the students is provided.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a pupil's mathematics is with adding subtraction slide rule to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: an addition-subtraction slide rule for mathematics of pupils comprises a straight ruler and a set square, wherein the front of the straight ruler is marked with dimension scales, the upper side of the front face of the triangular ruler is marked with dimension scales for subtraction, the lower side of the front face of the triangular ruler is marked with dimension scales for addition, a first fixing hole is arranged at the upper position of the addition size scale, a second fixing hole is arranged at the lower position of the subtraction size scale, the upper end and the lower end of the ruler are respectively provided with an upper expanding plate and a lower expanding plate, the upper expanding plate and the lower expanding plate are respectively provided with an upper guide rail hole and a lower guide rail hole, snap fasteners are arranged on the upper guide rail hole and the lower guide rail hole and are divided into a bottom buckle and a buckle cap, the bottom buckle is provided with a connecting cylinder, the bottom of the buckle cap is provided with a groove corresponding to the connecting cylinder, and the bottom buckle is inserted into the groove at the bottom of the buckle cap through the connecting cylinder and is connected with the buckle cap.

Preferably, the subtraction size scale and the addition size scale are sequentially marked with a number series from "0" to "10" from left to right, and the addition size scale is sequentially marked with a number series from "10" to "0" from left to right.

Preferably, the subtraction is performed using a size scale and a result indication arrow marked on the scale line of the number "0" of the size scale.

Preferably, an addition presentation mark is provided at a position above the addition size scale, and a subtraction presentation mark is provided at a position below the subtraction size scale.

Preferably, the set square is connected with the upper guide rail hole or the lower guide rail hole on the ruler through a snap fastener penetrating through the first fixing hole or the second fixing hole.

Preferably, the size scales for subtraction and the size scales for addition can be used for designing the scale ranges of various specifications according to the length of the triangular ruler, and the size scales can be used for designing the scale ranges of various specifications according to the length of the straight ruler.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses a pupil's mathematics is with adding and subtracting slide rule design, this application add and subtract slide rule had both kept original ruler measurement, the effect of setting-out, increased simple addition and subtraction operation function within ten simultaneously, there is special effect to improving children elementary school mathematics addition and subtraction method, theoretical knowledge with abstracting, present with the laboratory glassware, let the student calculate more directly perceived swiftly, understand the method and the law of addition operation fast, be particularly suitable for elementary school children to understand the notion of addition and subtraction operation, be convenient for improve children's computational rate, and the set square passes through snap-fastener with the ruler and is connected, when not needing to calculate, can take the end button and detain the cap apart, let set square and ruler separately use, moreover, the steam generator is simple in structure, and easy operation, and convenience and practicability.

Drawings

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

FIG. 2 is a schematic top view of the present invention;

FIG. 3 is a schematic diagram of the present invention for computing addition;

FIG. 4 is a schematic diagram of the present invention for calculating subtraction;

FIG. 5 is a schematic view of the snap fastener structure of the present invention;

in the figure: 1 ruler, 2 set square, 3 size scales, 4 subtraction size scales, 5 addition size scales, 6 first fixing holes, 7 second fixing holes, 8 upper expanding plate blocks, 9 lower expanding plate blocks, 10 upper guide rail holes, 11 lower guide rail holes, 12 snap fasteners, 13 bottom fasteners, 14 fastener caps, 15 connecting cylinders, 16 grooves, 17 result indication arrows, 18 addition prompt marks and 19 subtraction prompt marks.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely 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. 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. 1-5, the present invention provides a technical solution: an addition and subtraction slide rule for mathematics of pupils comprises a ruler 1, a set square 2, wherein size scales 3 are marked on the front upper side of the ruler 1, size scales 4 for subtraction are marked on the front upper side of the set square 2, size scales 5 for addition are marked on the front lower side of the set square 2, a first fixing hole 6 is arranged at the upper position of the size scales 5 for addition, a second fixing hole 7 is arranged at the lower position of the size scales 4 for subtraction, upper expansion plates 8 and lower expansion plates 9 are respectively arranged at the upper end and the lower end of the ruler 1, upper guide rail holes 10 and lower guide rail holes 11 are respectively arranged on the upper expansion plates 8 and the lower expansion plates 9, snap fasteners 12 are respectively arranged on the upper guide rail holes 10 and the lower guide rail holes 11, the snap fasteners 12 are divided into a bottom fastener 13 and a buckle cap 14, a connecting cylinder 15 is arranged on the bottom fastener 13, a groove 16 corresponding to the connecting cylinder 15 is arranged at the bottom of the buckle cap 14, the bottom buckle 13 is inserted into a groove 16 at the bottom of the buckle cap 14 through a connecting column 15 and is connected with the buckle cap 14. The subtraction scale 4 and the size scale 3 are numbered from left to right in sequence from "0" to "10". The addition size scale 5 is a series of numbers marked from "10" to "0" from left to right. The subtraction scale with the number "0" of the size scale 4 and the size scale 3 is marked with a result indication arrow 17. An addition presentation mark 18 is provided at a position above the addition size scale 5, and a subtraction presentation mark 19 is provided at a position below the subtraction size scale 4. The triangular ruler 2 is connected with an upper guide rail hole 10 or a lower guide rail hole 11 on the straight ruler 1 through a snap fastener 12 penetrating through the first fixing hole 6 or the second fixing hole 7. The size scales for subtraction 4 and the size scales for addition 5 can be used for designing the scale ranges of various specifications according to the length of the triangular ruler 2, and the size scales 3 can be used for designing the scale ranges of various specifications according to the length of the straight ruler 1.

Before this application uses, pass first fixed orifices 6 or second fixed orifices 7 on the set square 2 with the connection cylinder 15 on the end knot 13 earlier, again pass last guide rail hole 10 or lower guide rail hole 11 on the ruler to connection cylinder 15, then insert in detaining cap 4 bottom recess 16 with connection cylinder 15, make set square 2 be connected to on the extension plate 8 of ruler 1 or extend on the plate 9 down.

When the method is used for calculating addition, the triangular ruler 2 is connected to the upper extension plate 8 of the straight ruler 1 through the snap fasteners 12, as shown in fig. 3, firstly, the marked line of the number ' 10 ' on the triangular ruler 2 is aligned with the marked line of the number ' 0 ' on the straight ruler 1, then, the position of the addend and the addend is determined, the number on the scale 5 for adding on the triangular ruler 2 is the addend, the scale 3 for adding on the straight ruler 1 is the addend, for example, the number ' 4+3 ' is calculated, the triangular ruler 2 is moved leftwards along the guide rail hole 10, the marked line of the number ' 3 ' on the triangular ruler 2 is aligned with the marked line of the number ' 4 ' on the straight ruler 1, and the result indication arrow 17 on the straight ruler 1 points to the marked line of the number ' 7.

In the application, when the subtraction is calculated, the triangular ruler 2 is connected to the lower extension plate 9 of the straight ruler 1 through the snap fasteners 12, as shown in fig. 4, firstly, the marked line of the number "0" on the triangular ruler 2 is aligned with the marked line of the number "0" on the straight ruler 1, then, the position of the subtraction number and the subtracted number is determined, the number on the size scale 4 for the subtraction on the triangular ruler 2 is the subtracted number, the size scale 3 on the straight ruler 1 is the subtracted number, for example, "8-5" is calculated, the triangular ruler 2 is moved rightwards along the guide rail hole 10, the marked line of the number "5" on the triangular ruler 2 is aligned with the marked line of the number "8" on the straight ruler 1, and the result indication arrow 17 on the straight ruler 1 points to the marked line of the number "3. When the calculation is not needed, the bottom buckle 13 and the buckle cap 14 can be disassembled, so that the set square and the ruler can be used separately, and the ruler has the advantages of simple structure, easiness in operation, convenience and practicability.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "disposed," "connected," "fixed," "screwed" and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through an intermediate medium, and may be connected through the inside of two elements or in an interaction relationship between two elements, unless otherwise specifically defined, and the specific meaning of the above terms in the present invention will be understood by those skilled in the art according to specific situations.

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 pupil's mathematics is with adding and subtracting slide rule, includes ruler (1), set square (2) ruler (1) superscript size scale (3), its characterized in that: the upper side of the triangular ruler (2) is marked with subtraction size scales (4), the lower side of the triangular ruler (2) is marked with addition size scales (5), the upper position of the addition size scales (5) is provided with a first fixing hole (6), the lower position of the subtraction size scales (4) is provided with a second fixing hole (7), the upper end and the lower end of the ruler (1) are respectively provided with an upper expanding plate (8) and a lower expanding plate (9), the upper expanding plate (8) and the lower expanding plate (9) are respectively provided with an upper guide rail hole (10) and a lower guide rail hole (11), the upper guide rail hole (10) and the lower guide rail hole (11) are respectively provided with a snap fastener (12), the snap fastener (12) is divided into a bottom fastener (13) and a buckle cap (14) to form, the bottom fastener (13) is provided with a connecting cylinder (15), the bottom of the buckle cap (14) is provided with a groove (16) corresponding to the connecting cylinder (15), the bottom buckle (13) is inserted into a groove (16) at the bottom of the buckle cap (14) through a connecting column body (15) and is connected with the buckle cap (14).

2. The addition and subtraction slide rule for mathematics of elementary school students according to claim 1, characterized in that: the subtraction size scale (4) and the addition size scale (3) are sequentially marked with a number series from 0 to 10 from left to right, and the addition size scale (5) is sequentially marked with a number series from 10 to 0 from left to right.

3. The addition and subtraction slide rule for mathematics of elementary school students according to claim 1, characterized in that: the scale line of the number 0 of the size scale (4) and the size scale (3) for subtraction is marked with a result indication arrow (17).

4. The addition and subtraction slide rule for mathematics of elementary school students according to claim 1, characterized in that: an addition prompt mark (18) is arranged at the upper position of the addition size scale (5), and a subtraction prompt mark (19) is arranged at the lower position of the subtraction size scale (4).

5. The addition and subtraction slide rule for mathematics of elementary school students according to claim 1, characterized in that: the triangular ruler (2) is connected with an upper guide rail hole (10) or a lower guide rail hole (11) on the ruler (1) through a snap fastener (12) penetrating through the first fixing hole (6) or the second fixing hole (7).

6. The addition and subtraction slide rule for mathematics of elementary school students according to claim 1, characterized in that: the scale ranges of various specifications can be designed according to the length of the triangular ruler (2) by the size scales (4) for subtraction and the size scales (5) for addition, and the scale ranges of various specifications can be designed according to the length of the straight ruler (1) by the size scales (3).