CN214537637U

CN214537637U - Primary school mathematics dipperstick

Info

Publication number: CN214537637U
Application number: CN202120108365.1U
Authority: CN
Inventors: 刘大兵
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-01-18
Filing date: 2021-01-18
Publication date: 2021-10-29
Anticipated expiration: 2031-01-18

Abstract

The application discloses primary school's mathematics dipperstick, including main scale, fixed block, vice chi, handle pole, fixture block, bar groove, slider, rack one, rack two, spring one, square pole, T type round bar, drum, reset coil spring one, T type piece, draw-in groove, magnetic path one, magnetic path two, square pole, square groove, rolling pin, reset coil spring two, square, magnetic ring, T type pole and spring two. This application horizontal pulling auxiliary ruler, auxiliary ruler removes and drives the slider and remove along the bar groove, auxiliary ruler removes and drives rack one and remove and extrude rack two, make rack two remove and extrude spring one, when rack one removes and meshes with rack two again, under the effect of spring elasticity, rack two remove and mesh with rack one, T type round bar rotates and drives the drum and rotates, make magnetic path one and the separation of magnetic path two, under the effect of reset coil spring torsion, drum antiport drives T type round bar and rotates, and then make inside the arc wall that T type piece removed on the entering draw-in groove.

Description

Primary school mathematics dipperstick

Technical Field

The application relates to a mathematical measurement ruler, in particular to a primary school mathematical measurement ruler.

Background

Mathematics is a subject of studying concepts such as quantity, structure, variation, space, and information, and belongs to a form science from a certain point of view. Mathematicians and philosophers have a series of opinions on the exact scope and definition of mathematics, and mathematics plays an irreplaceable role in human historical development and social life and is an essential basic tool for learning and researching modern scientific technology.

The mathematical measurement chi that the tradition used has certain defect, lacks the convenient slip joint function of vice chi, causes inconveniently taking out vice chi from the main scale is inside, and then has reduced the practicality of dipperstick, lacks fixed establishment simultaneously, causes the inconvenient position to rack two to fix, and then the position of inconvenient fixed vice chi lacks rotation adjustment mechanism simultaneously, causes the position of the fixed handle pole of inconvenient regulation, and then the fixed main scale of inconvenient control. Therefore, the primary school mathematical measuring ruler is provided for solving the problems.

SUMMERY OF THE UTILITY MODEL

The primary school mathematics measuring scale comprises a main scale, a fixed block, an auxiliary scale, a handle rod, a clamping block, a sliding clamping mechanism, a fixed mechanism and a rotating adjusting mechanism, wherein the main scale is internally of a hollow structure;

the sliding clamping mechanism comprises a strip-shaped groove, a sliding block, a first rack, a second rack and a first spring, the strip-shaped groove is symmetrically formed in the upper end and the lower end of the interior of the main ruler, the sliding block is fixedly mounted on the left side of the top end and the left side of the bottom end of the auxiliary ruler, the sliding block is mounted in the strip-shaped groove, the first rack is fixedly mounted on the lower side of the front end of the auxiliary ruler, the first spring is fixedly mounted in the interior of the main ruler, the second rack is fixedly mounted on the rear end of the first spring, and the rear end of the second rack is meshed with the rear end of the first rack;

the fixing mechanism comprises a T-shaped round rod, a cylinder, a first reset coil spring, a T-shaped block and a clamping groove, the T-shaped round rod is rotatably installed in the middle of the front end of the second rack, the cylinder is installed on the annular side surface of the T-shaped round rod, the first reset coil spring is fixedly installed on the outer side of the cylinder, the outer side of the first reset coil spring is fixedly installed on the main scale, the two clamping grooves are symmetrically formed in the front end of the T-shaped round rod, the two T-shaped blocks are symmetrically and fixedly installed in the front end of the main scale, and the T-shaped block is installed inside the clamping groove;

the rotation adjusting mechanism comprises a rotation pin, a second reset coil spring, a square block, a magnetic ring, a T-shaped rod and a second spring, the left end and the right end of the handle rod are symmetrically and fixedly provided with rotating pins, the front end of the fixed block is provided with a groove, two round holes are symmetrically formed in the groove, a rotating pin is arranged in each round hole, a second reset coil spring is fixedly arranged on the annular side surface of each rotating pin, the outer side of the second reset coil spring is fixedly arranged in the round hole, the left end and the right end of the fixed block are symmetrically provided with T-shaped rods, the annular side surface of each T-shaped rod is provided with the second spring, two ends of the spring are respectively and fixedly arranged on the T-shaped rod and the fixed block, one end of the T-shaped rod extends to the inside of the round hole, and one end of the T-shaped rod is fixedly provided with a square block, the square block extends into the rotating pin, a magnetic ring is fixedly arranged in the round hole, and the magnetic ring is fixedly arranged on the outer side of the annular side face of the T-shaped rod.

Furthermore, the rear end of the main ruler is uniformly and fixedly provided with more than two square rods, the front end of each square rod is uniformly provided with more than two balls in a rolling manner, and the spherical side surfaces of the balls are attached to the rear end of the auxiliary ruler.

Furthermore, a circular through hole is formed in the front end of the main ruler, the outer side of the first reset coil spring is fixedly installed inside the circular through hole, the first miniature bearing is fixedly installed on the annular side face of the cylinder, and the outer side of the first miniature bearing is fixedly installed inside the circular through hole.

Furthermore, two square rods are fixedly mounted on the annular side face of the T-shaped round rod, two square grooves are symmetrically formed in the cylinder, and the square rods are mounted in the square grooves.

Furthermore, a first magnetic block is fixedly installed on the annular side face of the cylinder, a second magnetic block is fixedly installed inside the circular through hole, and the first magnetic block and the second magnetic block are located in the same vertical face.

Furthermore, the rotation adjusting mechanisms are provided with two groups, the two groups of rotation adjusting mechanisms are identical in structure, and the two groups of rotation adjusting mechanisms are symmetrically arranged at the left end and the right end of the fixing block.

Furthermore, a square groove is formed in one end, close to the square block, of the rotating pin, the size of the cross section of the square block is the same as that of the cross section of the square groove, and the cross sections of the square block and the square groove are square.

Furthermore, the clamping groove is composed of a square through groove and arc grooves, the two square through grooves and the two arc grooves are symmetrically formed in the front end of the T-shaped round rod, one end of each square through groove is communicated with the arc grooves, and the size of the cross section of each square through groove is the same as that of the cross section of the front end of the T-shaped block.

Furthermore, a second miniature bearing is fixedly mounted on the annular side face of the rotating pin, and the outer side of the second miniature bearing is fixedly mounted inside the round hole.

Furthermore, the fixture block is fixedly installed at the right end of the auxiliary ruler through a first bolt, and the fixture block is fixedly installed at the front end of the main ruler through a second bolt.

The beneficial effect of this application is: the application provides a primary school's mathematical survey chi with fixed vice chi of convenient slip and convenient fixed handle pole function of regulation.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.

FIG. 1 is a schematic overall structure diagram of an embodiment of the present application;

FIG. 2 is a schematic structural view of a sliding clamping mechanism according to an embodiment of the present application;

FIG. 3 is an enlarged view of a portion of one embodiment of the present application at A;

FIG. 4 is a schematic view of a barrel assembly according to an embodiment of the present application;

FIG. 5 is a schematic diagram of a T-block and slot structure according to an embodiment of the present application;

fig. 6 is a schematic structural diagram of a rotation adjusting mechanism according to an embodiment of the present application.

In the figure: 1. the square ruler comprises a main ruler body, 2, a fixing block, 3, an auxiliary ruler body, 4, a handle rod, 5, a clamping block, 6, a strip-shaped groove, 7, a sliding block, 8, a first rack, 9, a second rack, 10, a first spring, 11, a square rod, 12, a T-shaped round rod, 13, a cylinder, 14, a first reset coil spring, 15, a T-shaped block, 16, a clamping groove, 17, a first magnetic block, 18, a second magnetic block, 19, a square rod, 20, a square groove, 21, a rotating pin, 22, a second reset coil spring, 23, a square block, 24, a magnetic ring, 25, a T-shaped rod, 26 and a second spring.

Detailed Description

In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all 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 application.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be used. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

In this application, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. These terms are used primarily to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation.

Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meaning of these terms in this application will be understood by those of ordinary skill in the art as appropriate.

Furthermore, the terms "mounted," "disposed," "provided," "connected," and "sleeved" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.

Referring to fig. 1-6, the primary school mathematics measuring scale comprises a main scale 1, a fixed block 2, an auxiliary scale 3, a handle rod 4, a clamping block 5, a sliding clamping mechanism, a fixing mechanism and a rotating adjusting mechanism, wherein the main scale 1 is internally hollow, the auxiliary scale 3 is slidably mounted in the main scale 1, the right end of the auxiliary scale 3 extends to the outer side of the main scale 1, the clamping block 5 is fixedly mounted at the right end of the auxiliary scale 3, the left end of the clamping block 5 is attached to the right end of the main scale 1, the fixed block 2 is fixedly mounted at the middle position of the front end of the main scale 1, and the handle rod 4 is rotatably mounted at the bottom end of the fixed block 2;

the sliding clamping mechanism comprises a strip-shaped groove 6, a sliding block 7, a first rack 8, a second rack 9 and a first spring 10, the strip-shaped groove 6 is symmetrically arranged at the upper end and the lower end of the main ruler 1, the sliding block 7 is fixedly arranged on the left side of the top end and the left side of the bottom end of the auxiliary ruler 3, the sliding block 7 is arranged in the strip-shaped groove 6, the first rack 8 is fixedly arranged on the lower side of the front end of the auxiliary ruler 3, the first spring 10 is fixedly arranged in the main ruler 1, the second rack 9 is fixedly arranged on the rear end of the first spring 10, the rear end of the second rack 9 is meshed with the rear end of the first rack 8, a user horizontally pulls the auxiliary ruler 3, the sliding block 7 is driven to move along the strip-shaped groove 6 by the movement of the auxiliary ruler 3, the first rack 8 is driven to move to extrude the second rack 9, the second rack 9 is driven to extrude the first spring 10, and when the first rack 8 moves to be meshed with the second rack 9 again, under the action of the elastic force of the first spring 10, the second rack 9 moves to be meshed with the first rack 8;

the fixing mechanism comprises a T-shaped round rod 12, a cylinder 13, a first reset coil spring 14, a T-shaped block 15 and clamping grooves 16, the T-shaped round rod 12 is rotatably installed at the middle position of the front end of the second rack 9, the cylinder 13 is installed on the annular side surface of the T-shaped round rod 12, the first reset coil spring 14 is fixedly installed on the outer side of the cylinder 13, the outer side of the first reset coil spring 14 is fixedly installed on the main scale 1, the two clamping grooves 16 are symmetrically formed in the front end of the T-shaped round rod 12, the two T-shaped blocks 15 are symmetrically and fixedly installed on the front end of the main scale 1, the T-shaped blocks 15 are installed inside the clamping grooves 16, a user rotates the T-shaped round rod 12, the T-shaped round rod 12 drives the cylinder 13 to rotate through a square rod 19 and a square groove 20, the cylinder 13 rotates to extrude the first reset coil spring 14, the cylinder 13 rotates to drive a first magnet block 17 to move to be adsorbed and attached to a second magnet block 18, and the adsorption force between the first magnet block 17 and the second magnet block 18 is larger than the torsion force of the first reset coil spring 14, the position of the T-shaped round rod 12 is further fixed, at the moment, the square groove 20 in the clamping groove 16 is aligned with the T-shaped block 15, and therefore the rack II 9 can be conveniently moved, when the auxiliary ruler 3 needs to be fixed, a user rotates the T-shaped round rod 12, the T-shaped round rod 12 rotates to drive the cylinder 13 to rotate, the magnetic block I17 is separated from the magnetic block II 18, under the action of the torsion of the reset coil spring I14, the cylinder 13 rotates reversely to drive the T-shaped round rod 12 to rotate, the T-shaped block 15 is further moved into the arc-shaped groove in the clamping groove 16, the position of the T-shaped round rod 12 is further fixed, and the T-shaped round rod 12 and the rack II 9 are prevented from horizontally moving;

the rotation adjusting mechanism comprises a rotating pin 21, a second reset coil spring 22, a square block 23, a magnetic ring 24, a T-shaped rod 25 and a second spring 26, wherein the rotating pin 21 is symmetrically and fixedly installed at the left end and the right end of the handle rod 4, a groove is formed in the front end of the fixed block 2, two round holes are symmetrically formed in the groove, the rotating pin 21 is installed in each round hole, the second reset coil spring 22 is fixedly installed on the annular side surface of the rotating pin 21, the outer side of the second reset coil spring 22 is fixedly installed in each round hole, the T-shaped rods 25 are symmetrically installed at the left end and the right end of the fixed block 2, the second spring 26 is installed on the annular side surface of the T-shaped rod 25, the two ends of the second spring 26 are respectively and fixedly installed on the T-shaped rod 25 and the fixed block 2, one end of the T-shaped rod 25 extends into the round hole, the square block 23 is fixedly installed at one end of the T-shaped rod 25, and the square block 23 extends into the rotating pin 21, a magnetic ring 24 is fixedly arranged in the round hole, the magnetic ring 24 is fixedly arranged on the outer side of the annular side face of the T-shaped rod 25, a user horizontally pulls the T-shaped rod 25, the T-shaped rod 25 moves to drive the square block 23 to move and be drawn out from the inside of the square groove, the square block 23 moves to be attached to the magnetic ring 24 in an adsorption mode, the T-shaped rod 25 moves to stretch the second spring 26, the elastic force of the second spring 26 is smaller than the adsorption force between the magnetic ring 24 and the square block 23, further fixing the position of the block 23, rotating the position of the handle rod 4 by the rotating pin 21, further pressing the second reset coil spring 22, when the handle rod 4 rotates 90 degrees to the horizontal position, the user pushes the T-shaped rod 25, the T-shaped rod 25 moves to drive the square block 23 to move and separate from the magnetic ring 24, under the action of the elastic force of the second spring 26, the T-shaped rod 25 moves to drive the block 23 to move into the square groove, and the positions of the rotating pin 21 and the handle rod 4 are fixed.

The rear end of the main ruler 1 is uniformly and fixedly provided with more than two square rods 11, the front ends of the square rods 11 are uniformly and rollably provided with more than two balls, and the spherical side surfaces of the balls are attached to the rear end of the auxiliary ruler 3; a circular through hole is formed in the front end of the main ruler 1, the outer side of the first reset coil spring 14 is fixedly installed in the circular through hole, a first miniature bearing is fixedly installed on the annular side face of the cylinder 13, and the outer side of the first miniature bearing is fixedly installed in the circular through hole; two square rods 19 are fixedly arranged on the annular side surface of the T-shaped round rod 12, two square grooves 20 are symmetrically formed in the cylinder 13, and the square rods 19 are arranged in the square grooves 20; a first magnetic block 17 is fixedly mounted on the annular side surface of the cylinder 13, a second magnetic block 18 is fixedly mounted inside the circular through hole, and the first magnetic block 17 and the second magnetic block 18 are located in the same vertical surface; the two groups of the rotation adjusting mechanisms are the same in structure and are symmetrically arranged at the left end and the right end of the fixed block 2; one end of the rotating pin 21, which is close to the square 23, is provided with a square groove, the size of the cross section of the square 23 is the same as that of the square groove, and the cross sections of the square 23 and the square groove are both square; the clamping groove 16 consists of a square through groove and an arc-shaped groove, the front end of the T-shaped round rod 12 is symmetrically provided with two square through grooves and two arc-shaped grooves, one end of each square through groove is communicated with the arc-shaped groove, and the size of the cross section of each square through groove is the same as that of the cross section of the front end of the T-shaped block 15; a second miniature bearing is fixedly arranged on the annular side surface of the rotating pin 21, and the outer side of the second miniature bearing is fixedly arranged in the circular hole; the fixture block 5 is fixedly mounted at the right end of the auxiliary ruler 3 through a first bolt, and the fixture block 2 is fixedly mounted at the front end of the main ruler 1 through a second bolt.

This application is when using, and the vice chi of

horizontal pulling

3, 3 removal of vice chi drive slider 7 remove along

bar groove

6, and 3 removal of vice chi drive rack 8 remove and extrude rack two 9 for rack two 9 remove extrudees spring one 10, when rack 8 remove again with rack two 9 mesh, under the effect of spring one 10 elasticity, rack two 9 remove with rack one 8 meshes.

When the auxiliary ruler 3 needs to be fixed, a user rotates the T-shaped round rod 12, the T-shaped round rod 12 rotates to drive the cylinder 13 to rotate, the first magnetic block 17 is separated from the second magnetic block 18, the cylinder 13 rotates reversely to drive the T-shaped round rod 12 to rotate under the action of the first reset coil spring 14, the T-shaped block 15 is made to move into the arc-shaped groove on the clamping groove 16, the position of the T-shaped round rod 12 is fixed, and the horizontal movement of the T-shaped round rod 12 and the second rack 9 is avoided.

Utilize the position of rotation round pin 21 rotation handle bar 4, and then extrude reset coil spring two 22, when handle bar 4 rotated 90 to horizontal position, user pushed T type pole 25, and T type pole 25 removes and drives the square 23 and remove and separate with magnetic ring 24, and under the effect of spring two 26 elasticity, T type pole 25 removes and drives square 23 and remove and get into the square groove inside, and then the fixed position of rotating pin 21 and handle bar 4.

The application has the advantages that:

1. the auxiliary ruler is horizontally pulled, the auxiliary ruler is moved to drive the sliding block to move along the strip-shaped groove, the auxiliary ruler is moved to drive the rack I to move to extrude the rack II, the rack II is moved to extrude the spring I, when the rack I is moved to be meshed with the rack II again, under the action of elastic force of the spring, the rack II is moved to be meshed with the rack I, the problem that the auxiliary ruler is lack of a convenient sliding clamping function is solved, the auxiliary ruler is inconvenient to take out from the inside of the main ruler, and the practicability of the measuring ruler is further reduced.

2. When the fixed assistant ruler of needs, the user rotates T type pole, T type pole rotates and drives the drum and rotate, make magnetic path one and the separation of magnetic path two, under the effect of reset coil spring torsion, drum antiport drives T type pole and rotates, and then make inside the arc wall that T type piece removed on getting into the draw-in groove, and then the position of fixed T type pole, avoid the horizontal migration of T type pole and rack two, the solution lacks fixed establishment, cause inconvenient position to rack two to fix, and then the drawback of inconvenient fixed assistant ruler position.

3. Utilize the rotating pin to rotate the position of handle bar, and then extrude reset coil spring two, when rotating 90 to horizontal position as handle bar, the user promotes T type pole, T type pole removes and drives the square piece and remove and separate with the magnetic ring, under the effect of two elastic forces of spring, T type pole removes and drives the square piece and remove and get into inside the square groove, and then the position of fixed rotating pin and handle bar, the solution lacks rotation adjustment mechanism, cause the position of the fixed handle bar of inconvenient regulation, and then the inconvenient drawback of controlling fixed main scale.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. Primary school's mathematics dipperstick, its characterized in that: the auxiliary ruler comprises a main ruler (1), a fixing block (2), an auxiliary ruler (3), a handle rod (4), a clamping block (5), a sliding clamping mechanism, a fixing mechanism and a rotating adjusting mechanism, wherein the main ruler (1) is internally of a hollow structure, the auxiliary ruler (3) is slidably mounted in the main ruler (1), the right end of the auxiliary ruler (3) extends to the outer side of the main ruler (1), the clamping block (5) is fixedly mounted at the right end of the auxiliary ruler (3), the left end of the clamping block (5) is attached to the right end of the main ruler (1), the fixing block (2) is fixedly mounted at the middle position of the front end of the main ruler (1), and the handle rod (4) is rotatably mounted at the bottom end of the fixing block (2);

the sliding clamping mechanism comprises a strip-shaped groove (6), a sliding block (7), a first rack (8), a second rack (9) and a first spring (10), the strip-shaped groove (6) is symmetrically formed in the main ruler (1) at the upper end and the lower end, the sliding block (7) is fixedly mounted on the left side of the top end and the left side of the bottom end of the auxiliary ruler (3), the sliding block (7) is mounted inside the strip-shaped groove (6), the first rack (8) is fixedly mounted on the lower side of the front end of the auxiliary ruler (3), the first spring (10) is fixedly mounted in the main ruler (1), the second rack (9) is fixedly mounted on the rear end of the first spring (10), and the rear end of the second rack (9) is meshed with the rear end of the first rack (8);

the fixing mechanism comprises a T-shaped round rod (12), a cylinder (13), a first reset coil spring (14), T-shaped blocks (15) and clamping grooves (16), the T-shaped round rod (12) is rotatably installed at the middle position of the front end of the second rack (9), the cylinder (13) is installed on the annular side face of the T-shaped round rod (12), the first reset coil spring (14) is fixedly installed on the outer side of the cylinder (13), the outer side of the first reset coil spring (14) is fixedly installed on the main scale (1), the two clamping grooves (16) are symmetrically formed in the front end of the T-shaped round rod (12), the two T-shaped blocks (15) are symmetrically and fixedly installed on the front end of the main scale (1), and the T-shaped blocks (15) are installed inside the clamping grooves (16);

the rotary adjusting mechanism comprises a rotating pin (21), a second reset coil spring (22), a square block (23), a magnetic ring (24), a T-shaped rod (25) and a second spring (26), wherein the rotating pin (21) is symmetrically and fixedly installed at the left end and the right end of the handle rod (4), a groove is formed in the front end of the fixing block (2), two round holes are symmetrically formed in the groove, the rotating pin (21) is installed in each round hole, the second reset coil spring (22) is fixedly installed on the annular side surface of the rotating pin (21), the outer side of the second reset coil spring (22) is fixedly installed in each round hole, the T-shaped rod (25) is symmetrically installed at the left end and the right end of the fixing block (2), the second spring (26) is installed on the annular side surface of the T-shaped rod (25), the two ends of the second spring (26) are respectively and fixedly installed on the T-shaped rod (25) and the fixing block (2), one end of the T-shaped rod (25) extends to the inside each round hole, and one end of the T-shaped rod (25) is fixedly provided with a square block (23), the square block (23) extends to the inside of the rotating pin (21), a magnetic ring (24) is fixedly arranged in the round hole, and the magnetic ring (24) is fixedly arranged on the outer side of the annular side surface of the T-shaped rod (25).

2. An elementary school mathematical measurement ruler according to claim 1, characterized in that: the square ruler is characterized in that the rear end of the main ruler (1) is uniformly and fixedly provided with more than two square rods (11), the front end of each square rod (11) is uniformly provided with more than two balls in a rolling manner, and the spherical side surfaces of the balls are attached to the rear end of the auxiliary ruler (3).

3. An elementary school mathematical measurement ruler according to claim 1, characterized in that: a circular through hole is formed in the front end of the main scale (1), the outer side of the first reset coil spring (14) is fixedly installed inside the circular through hole, a first miniature bearing is fixedly installed on the annular side face of the cylinder (13), and the outer side of the first miniature bearing is fixedly installed inside the circular through hole.

4. An elementary school mathematical measurement ruler according to claim 1, characterized in that: two square rods (19) are fixedly mounted on the annular side face of the T-shaped round rod (12), two square grooves (20) are symmetrically formed in the cylinder (13), and the square rods (19) are mounted in the square grooves (20).

5. An elementary school mathematical measurement ruler according to claim 3, characterized in that: a first magnetic block (17) is fixedly mounted on the annular side face of the cylinder (13), a second magnetic block (18) is fixedly mounted inside the circular through hole, and the first magnetic block (17) and the second magnetic block (18) are located inside the same vertical face.

6. An elementary school mathematical measurement ruler according to claim 1, characterized in that: the rotary adjusting mechanisms are two groups, the rotary adjusting mechanisms are the same in structure, and the rotary adjusting mechanisms are symmetrically arranged at the left end and the right end of the fixing block (2).

7. An elementary school mathematical measurement ruler according to claim 1, characterized in that: the square groove is formed in one end, close to the square block (23), of the rotating pin (21), the size of the cross section of the square block (23) is the same as that of the cross section of the square groove, and the cross section of the square block (23) and the cross section of the square groove are square.

8. An elementary school mathematical measurement ruler according to claim 1, characterized in that: the clamping groove (16) is composed of a square through groove and an arc-shaped groove, the front end of the T-shaped round rod (12) is symmetrically provided with the two square through grooves and the two arc-shaped grooves, one end of each square through groove is communicated with the arc-shaped groove, and the cross section of each square through groove is the same as that of the front end of the T-shaped block (15).

9. An elementary school mathematical measurement ruler according to claim 1, characterized in that: and a second miniature bearing is fixedly mounted on the annular side surface of the rotating pin (21), and the outer side of the second miniature bearing is fixedly mounted in the round hole.

10. An elementary school mathematical measurement ruler according to claim 1, characterized in that: the fixture block (5) is fixedly installed at the right end of the auxiliary ruler (3) through a first bolt, and the fixture block (2) is fixedly installed at the front end of the main ruler (1) through a second bolt.