Mathematical seal

Abstract

A first roller and a second roller are installed in a shell, a first rotary knob and a second rotary knob are fixedly arranged at the outer end of the first roller and the outer end of the second roller respectively and located at the outer ends of the two sides of the shell respectively, and a rotary connecting piece is arranged between the first roller and the second roller. The first rotary knob is clamped by hands to fix the first roller, then the second rotary knob is forcibly rotated to drive the second roller to rotate, the second roller rotates to enable the clamping block to leave the clamping groove and enter the cavity, the movable plate moves the compression spring in the cavity, and therefore the second roller can be conveniently and independently rotated; and when the second roller rotates to enable the clamping block to meet the other clamping groove, the clamping block is clamped into the other clamping groove under the bounce of the spring, so that the first roller and the second roller which are combined into different equations can be fixedly connected conveniently, the operation steps are relatively simple, the use is relatively easy, and the operation is also relatively convenient.

Description

Technical Field

[0001] The utility model relates to the field of daily necessities, in particular to a mathematical seal. Background Art

[0002] Basic mathematical operations are the foundation of students' mathematics learning. They need to improve their calculation skills by constantly doing math exercises. Currently, most of the exercises are done through formula books, but the formula books are large and heavy, which is not only inconvenient to carry, but the contents of the formula books are the same, and students are prone to plagiarism. Some teachers or parents train their children's calculation ability by making up their own questions, but making up questions by themselves is very time-consuming and labor-intensive, and the effect is not good. Therefore, there is an urgent need for a math seal that can quickly combine different formulas and is easy to use.

[0003] When combining different formulas, traditional math seals mostly use external tools to loosen bolts to separate two math rollers, then rotate one of the math rollers separately to combine it with the other math roller into different formulas, then tighten the bolts using external tools to fix the two math rollers that combine different formulas together, and finally roll the two math rollers that combine different formulas to print on paper, so as to facilitate students to do exercises. However, the operation steps are relatively cumbersome and the use is also troublesome, and external tools are required for operation. Therefore, a math seal is needed to solve the above problems. Utility Model Content

[0004] The utility model aims to solve the problem that the operation steps of the mathematical seal in the prior art are relatively complicated when combining different formulas, and thus provides a mathematical seal.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a mathematical seal, including a shell, a first roller and a second roller are installed inside the shell, the outer ends of the first roller and the second roller are respectively fixed with a first knob and a second knob, and the first knob and the second knob are respectively located at the outer ends of both sides of the shell, a cover body is detachably provided at the bottom of the shell, and the cover body is located below the first roller and the second roller, and a rotating connecting piece is provided between the first roller and the second roller.

[0006] Furthermore, the rotating connecting member includes a circular rotating rod and two circular rotating disks, circular rotating disks are fixedly arranged at both ends of the circular rotating rod, circular disk grooves are opened inside the first roller and the second roller, the two circular rotating disks are rotatably arranged in the two circular disk grooves respectively, the two circular rotating disks are rotatably arranged in the first roller and the second roller respectively through the two circular disk grooves, a circular rod groove is opened at one end of the first roller and the second roller, and the circular rod groove is connected with the circular disk groove, and the circular rotating rod is rotatably arranged in the two circular rod grooves.

[0007] Furthermore, the end faces of the two circular turntables are each provided with a plurality of cavities, and the plurality of cavities are arranged at equal intervals in a circular ring, a plurality of movable plates are movably arranged inside the two groups of plurality of cavities, a plurality of springs are fixedly arranged at one end of the two groups of plurality of movable plates, and the plurality of springs are located between the plurality of movable plates and the bottom of the plurality of cavities.

[0008] Furthermore, a plurality of blocks are fixedly provided at one end of the two groups of several movable plates, and the plurality of blocks penetrate through the plurality of cavities and extend to the outside of the circular turntable. A plurality of slots are provided inside the first roller and the second roller, and the plurality of slots are arranged at equal intervals in the form of a circular ring on the inner side surface of the circular disc slot, and the two groups of several blocks are respectively inserted into the two groups of several slots.

[0009] Furthermore, both sides of the tops of the plurality of card blocks are inclined.

[0010] The beneficial effects of the utility model are as follows: by providing a movable plate, a spring, a card block and a card slot, when different formulas need to be combined, the first roller is fixed by clamping the first knob by hand, and then the second knob is turned forcefully to drive the second roller to rotate. The rotation of the second roller causes the card block to leave the card slot and enter the cavity, so that the movable plate moves in the cavity to compress the spring, thereby facilitating the independent rotation of the second roller. When the second roller rotates and causes the card block to encounter another card slot, the card block is stuck in the other card slot under the rebound force of the spring, thereby facilitating the fixed connection of the first roller and the second roller combined into different formulas. The operation steps are relatively simple, the use is relatively easy and convenient, and no external tools are required for operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0012] Figure 2 This is a schematic diagram of the main cross-sectional structure of the utility model;

[0013] Figure 3 It is a structural schematic diagram of a circular rotating rod and a circular rotating disk in the utility model;

[0014] Figure 4 It is a schematic diagram of the side cross-sectional structure of the second roller in the utility model.

[0015] In the figure: 1 shell, 2 cover, 3 first roller, 4 first knob, 5 second roller, 6 second knob, 7 round rotating rod, 8 round rotating disk, 9 disk groove, 10 round rod groove, 11 cavity, 12 moving plate, 13 spring, 14 clamping block, 15 clamping groove. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0017] Reference Figures 1 to 4 The present embodiment provides a mathematical seal, comprising a shell 1, wherein a first roller 3 and a second roller 5 are installed inside the shell 1, and the outer ends of the first roller 3 and the second roller 5 are respectively fixedly provided with a first knob 4 and a second knob 6, and the first knob 4 and the second knob 6 are respectively located at the outer ends of both sides of the shell 1, and a cover body 2 is detachably provided at the bottom of the shell 1, and the cover body 2 is located below the first roller 3 and the second roller 5, and a rotating connecting piece is provided between the first roller 3 and the second roller 5; preferably, the shell 1 is provided to facilitate the installation of the first roller 3 and the second roller 5 inside thereof, and the cover body 2 is provided to facilitate opening or closing the shell 1, and the first knob 4 is conveniently driven to rotate in the shell 1, and the second knob 6 is conveniently driven to rotate in the shell 1, and the rotating connecting piece is provided to facilitate the first roller 3 and the second roller 5 to roll in the shell 1, and different formulas are conveniently printed on paper by rolling the first roller 3 and the second roller 5, so as to facilitate students to do exercises on paper.

[0018] Further, the rotating connecting member includes a circular rotating rod 7 and two circular rotating disks 8, both ends of which are fixedly provided with circular rotating disks 8, and circular rotating rods 7 are provided with circular rotating disks 8 inside the first roller 3 and the second roller 5. Disc grooves 9 are provided inside the first roller 3 and the second roller 5, and the two circular rotating disks 8 are respectively rotatably arranged in the two disc grooves 9. The two circular rotating disks 8 are respectively rotatably arranged in the first roller 3 and the second roller 5 through the two disc grooves 9. One end of the first roller 3 and the second roller 5 is provided with a round rod groove 10, and the round rod groove 10 is connected with the disc groove 9, and the circular rotating rod 7 is rotatably arranged in the two round rod grooves 10; preferably, by providing a circular rotating rod 7 and two circular rotating disks 8, it is convenient to rotatably connect the first roller 3 and the second roller 5 in the shell 1, and by rotating the circular rotating rod 7 in the two round rod grooves 10, it is convenient to drive the two circular rotating disks 8 to rotate in the two disc grooves 9, and then it is convenient to drive the two circular rotating disks 8 to rotate in the first roller 3 and the second roller 5, so as to facilitate the first roller 3 and the second roller 5 to be connected together, thereby preventing the first roller 3 and the second roller 5 from separating in the shell 1.

[0019] Furthermore, the end surfaces of the two circular turntables 8 are each provided with a plurality of cavities 11, and the plurality of cavities 11 are arranged at equal intervals in a circular ring. A plurality of movable plates 12 are movably arranged inside the two groups of the plurality of cavities 11, and a plurality of springs 13 are fixedly arranged at one end of the two groups of the plurality of movable plates 12, and the plurality of springs 13 are located between the plurality of movable plates 12 and the bottom of the plurality of cavities 11; preferably, by providing a plurality of cavities 11, it is convenient to movably arrange a plurality of movable plates 12 in the end surface of the circular turntable 8, and by the plurality of movable plates 12 moving in the plurality of cavities 11, it is convenient to stretch or compress a plurality of springs 13 in the plurality of cavities 11, and by the plurality of cavities 11 being arranged at equal intervals in a circular ring, it is convenient to arrange a plurality of movable plates 12 and a plurality of springs 13 in the end surface of the circular turntable 8 at equal intervals in a circular ring, so as to have the same spacing as the formula on the surface of the first roller 3 and the second roller 5, thereby facilitating the rotation of the first roller 3 and the second roller 5 into different combinations.

[0020] Furthermore, one end of the two groups of several moving plates 12 is fixedly provided with several blocks 14, and the several blocks 14 penetrate the several cavities 11 and extend to the outside of the circular turntable 8. The inside of the first roller 3 and the second roller 5 are provided with several slots 15, and the several slots 15 are arranged in a circular ring at equal intervals on the inner side of the disc slot 9, and the two groups of several blocks 14 are respectively inserted into the two groups of several slots 15; preferably, the several moving plates 12 are moved to facilitate the several blocks 14 to move inside and outside the circular turntable 8, and the several blocks 14 are moved to facilitate the several slots 15 to be inserted into, thereby facilitating the first roller 3 and the second roller 5 to be fixedly connected, so that the first roller 3 and the second roller 5 can be rolled at the same time, thereby preventing the first roller 3 or the second roller 5 from rotating alone.

[0021] Furthermore, both sides of the tops of the plurality of blocks 14 are inclined; preferably, by setting both sides of the tops of the plurality of blocks 14 to be inclined, it is convenient for the first roller 3 and the second roller 5 to press the plurality of blocks 14 into the plurality of cavities 11, thereby facilitating the first roller 3 or the second roller 5 to rotate separately and combine into different formulas.

[0022] In the utility model, when different formulas need to be combined, the first roller 3 is fixed by clamping the first knob 4 by hand, and then the second knob 6 is turned forcefully to drive the second roller 5 to rotate. The second roller 5 rotates so that the plurality of card blocks 14 leave the plurality of card slots 15 and enter the plurality of cavities 11, and then the plurality of card blocks 14 push the plurality of moving plates 12 to move in the plurality of cavities 11, and then the plurality of moving plates 12 compress the plurality of springs 13 in the plurality of cavities 11, so that the second roller 5 can rotate alone. When the second roller 5 rotates so that the plurality of card blocks 14 encounter another plurality of card slots 15, the plurality of card blocks 14 can move in the plurality of cavities 11. When there are a plurality of card slots 15 in one group, a plurality of card blocks 14 are inserted into another plurality of card slots 15 under the rebound force of a plurality of springs 13, so that the second roller 5 is fixed after the rotation is completed, so that the second roller 5 and the first roller 3 are conveniently combined into different formulas, and the first knob 4 and the second knob 6 are loosened, so as to facilitate the fixed connection of the first roller 3 and the second roller 5 combined into different formulas, so as to facilitate the rolling combination of the first roller 3 and the second roller 5 into different formulas to be printed on paper, so as to facilitate students to do exercises, and the operation steps are relatively simple, and the use is relatively easy and convenient, and no external tools are required for operation.

[0023] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A mathematical seal, comprising a shell (1), wherein a first roller (3) and a second roller (5) are installed inside the shell (1), and a first knob (4) and a second knob (6) are fixedly arranged at the outer ends of the first roller (3) and the second roller (5), respectively, and the first knob (4) and the second knob (6) are respectively located at the outer ends of both sides of the shell (1), and a cover body (2) is detachably arranged at the bottom of the shell (1), and the cover body (2) is located below the first roller (3) and the second roller (5), and a rotating connecting member is arranged between the first roller (3) and the second roller (5).

2. The mathematical seal according to claim 1, characterized in that: The rotating connecting member comprises a circular rotating rod (7) and two circular rotating disks (8); the circular rotating disks (8) are fixedly arranged at both ends of the circular rotating rod (7); circular disk grooves (9) are provided inside the first roller (3) and the second roller (5); the two circular rotating disks (8) are rotatably arranged in the two circular disk grooves (9) respectively; the two circular rotating disks (8) are rotatably arranged in the first roller (3) and the second roller (5) respectively through the two circular disk grooves (9); a circular rod groove (10) is provided at one end of the first roller (3) and the second roller (5); the circular rod groove (10) is communicated with the circular disk groove (9); and the circular rotating rod (7) is rotatably arranged in the two circular rod grooves (10).

3. The mathematical seal according to claim 2, characterized in that: The end surfaces of the two circular turntables (8) are each provided with a plurality of cavities (11), and the plurality of cavities (11) are arranged at equal intervals in a circular ring; a plurality of movable plates (12) are movably arranged inside the two groups of the plurality of cavities (11); a plurality of springs (13) are fixedly arranged at one end of the two groups of the plurality of movable plates (12), and the plurality of springs (13) are located between the plurality of movable plates (12) and the bottom of the plurality of cavities (11).

4. The mathematical seal according to claim 3, characterized in that: A plurality of clamping blocks (14) are fixedly arranged at one end of the two groups of the plurality of movable plates (12), and the plurality of clamping blocks (14) penetrate the plurality of cavities (11) and extend to the outside of the circular rotating disk (8). A plurality of clamping grooves (15) are provided inside the first roller (3) and the second roller (5), and the plurality of clamping grooves (15) are arranged at equal intervals in the form of a circular ring on the inner side surface of the circular disk groove (9), and the two groups of the plurality of clamping blocks (14) are respectively clamped into the two groups of the plurality of clamping grooves (15).

5. The mathematical seal according to claim 4, characterized in that: Both sides of the tops of the plurality of clamping blocks (14) are arranged obliquely.

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