CN213518842U

CN213518842U - Primary school mathematics four fundamental operations demonstration device

Info

Publication number: CN213518842U
Application number: CN202022665126.4U
Authority: CN
Inventors: 郝高玲
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-11-17
Filing date: 2020-11-17
Publication date: 2021-06-22
Anticipated expiration: 2030-11-17

Abstract

The application discloses elementary school mathematics arithmetic presentation device, including removing bottom plate, bracing piece, clipboard, writing block, fixed block one, fixed block two, toper piece, spring one, adjusting bolt, connecting rod, U type sloping block, spring two, nut one, rotating pin, gear, arc rack, spring three and fastening bolt. This application adjusting bolt removes along nut one, adjusting bolt removes and drives the connecting rod removal, the connecting rod removes and drives U type sloping block removal, U type sloping block removes and extrudees the toper piece, make the toper piece remove and get into inside the bell jar completely, and then it is fixed to accomplish the joint of writing the piece, the clipboard removes and drives the swivel pin and rotates, the swivel pin rotates and drives gear rotation, gear rotation extrudees the arc rack, the arc rack removes and extrudees three springs, the elasticity of three springs is convenient for and is meshed once more when the arc rack aligns with the gear, and then the inclination of convenient continuous adjustment clipboard.

Description

Primary school mathematics four fundamental operations demonstration device

Technical Field

The application relates to an operation demonstration device, in particular to a primary school mathematics four fundamental operations demonstration device.

Background

In mathematics, when a first-level operation (addition and subtraction) and a second-level operation (multiplication and division) appear in one expression at the same time, the operation sequence is firstly multiplication and division and then addition and subtraction, if brackets exist, the bracket is firstly included and then included, the same-level operation sequence is from left to right, and the operation is called four-way operation.

The operation presentation device that the tradition used has certain defect, lacks the block fixture of writing, causes inconveniently will write the block centre gripping between fixed block one and fixed block two or fixed block two and fixed block two, and then inconvenient demonstration of calculating, lacks adjustment mechanism simultaneously, causes the fixed clipboard inclination of inconvenient regulation, reduces the practicality of clipboard. Therefore, a device for demonstrating the four fundamental operations of primary mathematics is provided for solving the problems.

Disclosure of Invention

A primary school mathematics four fundamental operations demonstration device comprises a movable bottom plate, two supporting rods, a writing board, writing blocks, a first fixing block, a second fixing block, a clamping mechanism and an adjusting mechanism, wherein the two supporting rods are symmetrically and fixedly installed at the top end of the movable bottom plate, the writing board is rotatably installed between the two supporting rods, the four writing blocks are uniformly assembled at the front end of the writing board, the top ends of the writing blocks are attached to the top end of the inner part of the writing board in an adsorption mode, the first fixing block and the second fixing block are uniformly installed at the front end of the writing board, and the two fixing blocks are located on the outer side of the first fixing block;

the clamping mechanism comprises a conical block, a first spring, an adjusting bolt, connecting rods, a U-shaped inclined block and a second spring, wherein the first spring is fixedly mounted at the left end and the right end of the first fixed block and one end, close to the first fixed block, of the second fixed block;

adjustment mechanism includes rotating pin, gear, arc rack and spring three, the rotating pin is installed to the clipboard left and right sides both ends symmetry, the rotating pin rotates and installs inside the bracing piece, fixed mounting gear on the rotating pin annular side, the inside fixed mounting spring three of bracing piece, and three bottom fixed mounting arc racks of spring, arc rack meshes with gear annular side mutually.

Furthermore, the adjusting mechanisms are two groups, the two groups of adjusting mechanisms are identical in structure, and the two groups of adjusting mechanisms are symmetrically arranged at the left end and the right end of the writing board.

Furthermore, a circular through hole is formed in one end of the supporting rod, a spring III is fixedly mounted at the top end inside the circular through hole, a bearing is fixedly mounted on the annular side face of the rotating pin, and the outer side of the bearing is fixedly mounted inside the circular through hole.

Furthermore, tapered slots are symmetrically formed in the left end and the right end of the writing block, a first nut is mounted on the annular side face of the adjusting bolt, the outer side of the first nut is fixedly mounted inside a first fixing block, a ball is mounted at the front end of the connecting rod, and the spherical side face of the ball is attached to the adjusting bolt.

Furthermore, a fastening bolt is installed at the top end of the supporting rod, a second nut is installed on the annular side face of the fastening bolt, the second nut is fixedly installed inside the supporting rod, and the bottom end of the fastening bolt is aligned with the middle position of the top end of the arc-shaped gear.

Furthermore, four universal wheels are uniformly installed at the bottom end of the movable bottom plate, and the universal wheels are fixedly installed at the bottom end of the movable bottom plate through bolts.

The beneficial effect of this application is: the application provides a primary school mathematics four fundamental operations of mathematics presentation device with convenient joint writing block and convenient fixed clipboard position of regulation function.

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 view of a clamping mechanism according to an embodiment of the present application;

FIG. 3 is a schematic structural diagram of a U-shaped swash block according to an embodiment of the present application;

fig. 4 is a schematic structural diagram of an adjusting mechanism according to an embodiment of the present application.

In the figure: 1. the writing board comprises a movable bottom plate, 2, a support rod, 3, a writing board, 4, a writing block, 5, a first fixing block, 6, a second fixing block, 7, a conical block, 8, a first spring, 9, an adjusting bolt, 10, a connecting rod, 11, a U-shaped inclined block, 12, a second spring, 13, a first nut, 14, a rotating pin, 15, a gear, 16, an arc-shaped rack, 17, a third spring, 18 and a fastening bolt.

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. 1-4, the device for demonstrating arithmetic of four fundamental mathematics of primary school comprises a movable bottom plate 1, supporting rods 2, a writing board 3, writing blocks 4, a first fixing block 5, a second fixing block 6, a clamping mechanism and an adjusting mechanism, wherein the two supporting rods 2 are symmetrically and fixedly installed at the top end of the movable bottom plate 1, the writing board 3 is rotatably installed between the two supporting rods 2, the four writing blocks 4 are uniformly assembled at the front end of the writing board 3, the top ends of the writing blocks 4 are attached to the top end of the inner part of the writing board 3 in an adsorption manner, the first fixing block 5 and the second fixing block 6 are uniformly installed at the front end of the writing board 3, and the second fixing block 6 is positioned outside the first fixing block 5;

the clamping mechanism comprises a conical block 7, a first spring 8, an adjusting bolt 9, a connecting rod 10, a U-shaped inclined block 11 and a second spring 12, wherein the first spring 8 is fixedly arranged at the left end and the right end of the first fixing block 5 and the end, close to the first fixing block 5, of the second fixing block 6, the middle position of one end of the conical block 7 is fixedly arranged at one end of the first spring 8, the adjusting bolt 9 is arranged at the front end of the first fixing block 5, one end of the adjusting bolt 9 extends into the first fixing block 5, the two connecting rods 10 are symmetrically arranged at the front end of the first fixing block 5, one end of each connecting rod 10 extends into the first fixing block 5, the U-shaped inclined block 11 is fixedly arranged at one end of each connecting rod 10, the second spring 12 is arranged on the annular side surface of each connecting rod 10, the two ends of the second spring 12 are respectively fixedly arranged in the first fixing block 5 and, the writing block 4 moves to press the conical block 7, the conical block 7 is pressed to move and press the spring I8, so that the spring I8 generates elastic force, when the conical block 7 is aligned with the conical groove, under the action of the elastic force of the first spring 8, the conical block 7 moves into the conical groove, the adjusting bolt 9 is screwed, the adjusting bolt 9 moves along the first nut 13, the adjusting bolt 9 moves to drive the connecting rod 10 to move, the connecting rod 10 moves to drive the U-shaped inclined block 11 to move, the U-shaped inclined block 11 moves to extrude the conical block 7, so that the conical block 7 moves completely into the conical groove, the clamping and fixing of the writing block 4 are further completed, the conical block 7 moves to stretch the first spring 8, the elastic force of the first spring 8 facilitates the moving and resetting of the conical block 7, the U-shaped inclined block 11 moves to stretch the second spring 12, and the elastic force of the second spring 12 facilitates the moving and resetting of the U-shaped inclined block 11;

the adjusting mechanism comprises a rotating pin 14, a gear 15, an arc-shaped rack 16 and a spring III 17, the rotating pin 14 is symmetrically installed at the left end and the right end of the writing board 3, the rotating pin 14 is rotatably installed inside the supporting rod 2, the gear 15 is fixedly installed on the annular side surface of the rotating pin 14, the spring III 17 is fixedly installed inside the supporting rod 2, the arc-shaped rack 16 is fixedly installed at the bottom end of the spring III 17, the arc-shaped rack 16 is meshed with the annular side surface of the gear 15, a user rotates the writing board 3, the writing board 3 moves to drive the rotating pin 14 to rotate, the gear 15 is rotated by the rotating pin 14, the gear 15 rotates to extrude the arc-shaped rack 16, the arc-shaped rack 16 moves to extrude the spring III 17, the elastic force of the spring III 17 is convenient for the arc-shaped rack 16 to be meshed with the gear 15 when being aligned, and rotating the fastening bolt 18, moving the fastening bolt 18 along the second nut, and moving the fastening bolt 18 to be attached to the arc-shaped rack 16 to prevent the arc-shaped rack 16 from moving so as to fix the inclination angle of the writing board 3.

The two groups of adjusting mechanisms are same in structure and are symmetrically arranged at the left end and the right end of the writing board 3; a circular through hole is formed in one end of the supporting rod 2, a third spring 17 is fixedly mounted at the top end inside the circular through hole, a bearing is fixedly mounted on the annular side face of the rotating pin 14, and the outer side of the bearing is fixedly mounted inside the circular through hole; tapered grooves are symmetrically formed in the left end and the right end of the writing block 4, a first nut 13 is mounted on the annular side face of the adjusting bolt 9, the outer side of the first nut 13 is fixedly mounted inside a first fixing block 5, a ball is mounted at the front end of the connecting rod 10, and the spherical side face of the ball is attached to the adjusting bolt 9; a fastening bolt 18 is arranged at the top end of the support rod 2, a second nut is arranged on the annular side surface of the fastening bolt 18 and is fixedly arranged in the support rod 2, and the bottom end of the fastening bolt 18 is aligned with the middle position of the top end of the arc-shaped gear 15; four universal wheels are evenly installed at the bottom end of the movable bottom plate 1, and the universal wheels are fixedly installed at the bottom end of the movable bottom plate 1 through bolts.

This application is when using, under the effect of 8 elasticity of spring, inside conical block 7 removed the entering conical groove, twist adjusting bolt 9, adjusting bolt 9 removes along nut 13, adjusting bolt 9 removes and drives connecting rod 10 and remove, connecting rod 10 removes and drives U type sloping block 11 and removes, U type sloping block 11 removes and extrudees conical block 7, make conical block 7 remove and get into inside the conical groove completely, and then it is fixed to accomplish the joint of writing piece 4, and then the operation that conveniently will take advantage of and divide is placed at the front side and at first operates.

The writing board 3 moves to drive the rotating pin 14 to rotate, the rotating pin 14 rotates to drive the gear 15 to rotate, the gear 15 rotates to extrude the arc-shaped rack 16, the arc-shaped rack 16 moves to extrude the spring III 17, the elastic force of the spring III 17 is convenient for the arc-shaped rack 16 to be meshed with the gear 15 when being aligned, and then the inclination angle of the writing board 3 can be adjusted conveniently and continuously.

The application has the advantages that:

1. under the effect of a spring elasticity, the toper piece removes inside getting into the bell jar, twist and move adjusting bolt, adjusting bolt removes along nut one, adjusting bolt removes and drives the connecting rod and remove, the connecting rod removes and drives U type sloping block and removes, U type sloping block removes and extrudees the toper piece, make the toper piece remove and get into the bell jar inside completely, and then the completion is fixed to the joint of writing the piece, it lacks writing piece fixture to have solved, cause inconvenient writing piece centre gripping between fixed block one and fixed block two or fixed block two and fixed block two, and then inconvenient drawback to calculating the demonstration.

2. The clipboard removes to drive the rotating pin and rotates, and the rotating pin rotates and drives the gear and rotate, and gear revolve extrudees the arc rack, and the arc rack removes to extrude spring three, and the elasticity of spring three is convenient for the arc rack and meshes once more when the gear aligns, and then the inclination of convenient continuous adjustment clipboard has solved and has lacked adjustment mechanism, causes inconvenient fixed clipboard inclination of regulation, reduces the drawback of clipboard practicality.

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. A primary school mathematics four fundamental operations presentation device which characterized in that: the writing board comprises a moving bottom plate (1), supporting rods (2), a writing board (3), writing blocks (4), a first fixing block (5), a second fixing block (6), a clamping mechanism and an adjusting mechanism, wherein the two supporting rods (2) are symmetrically and fixedly installed at the top end of the moving bottom plate (1), the writing board (3) is rotatably installed between the two supporting rods (2), the four writing blocks (4) are uniformly assembled at the front end of the writing board (3), the top end of the writing block (4) is attached to the top end inside the writing board (3) in an adsorption mode, the first fixing block (5) and the second fixing block (6) are uniformly installed at the front end of the writing board (3), and the two fixing blocks (6) are located on the outer sides of the first fixing blocks (5);

the clamping mechanism comprises a conical block (7), a first spring (8), an adjusting bolt (9), connecting rods (10), a U-shaped inclined block (11) and a second spring (12), wherein the first spring (8) is fixedly installed at the left end and the right end of the first fixing block (5) and the end, close to the first fixing block (5), of the second fixing block (6), the first spring (8) is fixedly installed at the middle position of one end of the conical block (7), the adjusting bolt (9) is installed at the front end of the first fixing block (5), one end of the adjusting bolt (9) extends into the first fixing block (5), the front end of the first fixing block (5) is symmetrically provided with the two connecting rods (10), one end of each connecting rod (10) extends into the first fixing block (5), one end of each connecting rod (10) is fixedly provided with the U-shaped inclined block (11), the second spring (12) is installed on the, two ends of the second spring (12) are respectively and fixedly arranged inside the first fixing block (5) and on the U-shaped inclined block (11);

adjustment mechanism includes rotation pin (14), gear (15), arc rack (16) and three (17) of spring, rotation pin (14) are installed to clipboard (3) left and right sides both ends symmetry, rotation pin (14) rotate and install inside bracing piece (2), fixed mounting gear (15) on rotation pin (14) annular flank, bracing piece (2) inside fixed mounting spring three (17), and spring three (17) bottom fixed mounting arc rack (16), arc rack (16) mesh with gear (15) annular flank mutually.

2. The demonstration device for arithmetic of four fundamental mathematics of primary schools according to claim 1, wherein: the adjusting mechanisms are two groups, the two groups of adjusting mechanisms are identical in structure, and the two groups of adjusting mechanisms are symmetrically arranged at the left end and the right end of the writing board (3).

3. The demonstration device for arithmetic of four fundamental mathematics of primary schools according to claim 1, wherein: a circular through hole is formed in one end of the supporting rod (2), a spring III (17) is fixedly mounted at the top end inside the circular through hole, a bearing is fixedly mounted on the annular side face of the rotating pin (14), and the outer side of the bearing is fixedly mounted inside the circular through hole.

4. The demonstration device for arithmetic of four fundamental mathematics of primary schools according to claim 1, wherein: the tapered slot has been seted up to both ends symmetry about writing piece (4), mounting nut (13) on adjusting bolt (9) annular side, and inside nut (13) outside fixed mounting fixed block (5), connecting rod (10) front end installation ball, and the spherical side of ball laminates with adjusting bolt (9) mutually.

5. The demonstration device for arithmetic of four fundamental mathematics of primary schools according to claim 1, wherein: the top end of the support rod (2) is provided with a fastening bolt (18), a second nut is arranged on the annular side face of the fastening bolt (18), the second nut is fixedly arranged inside the support rod (2), and the bottom end of the fastening bolt (18) is aligned with the middle position of the top end of the arc-shaped gear (15).

6. The demonstration device for arithmetic of four fundamental mathematics of primary schools according to claim 1, wherein: four universal wheels are uniformly installed at the bottom end of the movable bottom plate (1), and the universal wheels are fixedly installed at the bottom end of the movable bottom plate (1) through bolts.