Round calculator for addition and subtraction within 20
By designing a circular addition and subtraction calculator, using the combination of disk and pointer, the problem of frequent errors among beginners in addition and subtraction operations is solved, which improves the intuitiveness and fun of the operations and increases the interest in learning.
Patent Information
- Application Number
- CN202323499762.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-20
- Publication Date
- 2025-01-10
- Estimated Expiration
- 2033-12-20
AI Technical Summary
Beginners often make mistakes when performing addition and subtraction operations, and lack intuitive and interesting auxiliary demonstration devices, resulting in poor impression of numerical familiarity and basic formulas.
A circular addition and subtraction calculator is designed, including a base, a disc and a pointer. Through the rotation of the disc and the direction of the pointer, an accurate and fast calculation display is formed, combining hands-on operations to enhance fun and learning interest.
By improving operational experience and intuitiveness, the interest in accurate viewing and calculation of numbers is enhanced, and the interest in learning and understanding of mathematical calculations is improved.
Smart Images
Figure CN222337768U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of educational stationery, in particular to a circular addition and subtraction calculator within 20. Background Art
[0002] Addition and subtraction are basic operations in mathematics and are also commonly used calculation methods in daily life. Although addition and subtraction seem simple, they require certain skills and methods to truly master. Addition and subtraction are two of the most basic mathematical operations, and their definitions are very simple. Addition refers to combining two or more numbers into one number, and subtraction refers to subtracting one number from another.
[0003] Integer addition rule: align the same digits, add from the lowest digit, if the sum of the numbers in a digit is ten, add one to the previous digit. Integer subtraction rule: align the same digits, subtract from the lowest digit, if the number in a digit is not enough to subtract, subtract one from the previous digit to make ten, add it to the number in the current digit, and then subtract.
[0004] In the initial stage of learning addition and subtraction, students often make mistakes in addition and subtraction operations. This is mainly because students are not familiar with numbers and have a weak impression of basic formulas, which leads to confusion in calculations. Addition and subtraction of numbers within 20 are often the most prone to errors, so there is a lack of a demonstration device that is interesting and can intuitively demonstrate addition and subtraction operations. Utility Model Content
[0005] In order to solve the problem that beginners often make mistakes in addition and subtraction operations and lack auxiliary demonstration equipment, the utility model provides a circular addition and subtraction calculator within 20.
[0006] The utility model is realized by the following technical solutions:
[0007] A circular addition and subtraction calculator within 20 comprises a base, wherein a first disk is arranged at the upper end of the base, and a second disk rotatably mounted on the base is arranged below the first disk; the first disk and the second disk are both provided with numbers that can form corresponding numbers after adjustment, and the first disk is provided with a pointer pointing to the number on the second disk.
[0008] The base supports disk one and disk two, and disk two can rotate relative to disk one, which helps to improve the operating experience. The pointer points to the numbers on disk two, which can be accurately and quickly found, demonstrating the intuitiveness of the operation; combined with the hands-on experience, it increases the fun of mathematical calculations and enhances interest in learning.
[0009] A further improvement of the utility model is that the diameter of the disc 1 is smaller than the diameter of the disc 2, so as to facilitate the rotation operation of the disc 2.
[0010] A further improvement of the utility model is that the numbers on the first disc are arranged around the edge of its upper surface, and the numbers on the second disc are arranged around the edge of its upper surface, so as to facilitate observation of the numbers.
[0011] A further improvement of the utility model is that both the first and second disks are provided with character dividing lines, and the character dividing lines are arranged between two adjacent numbers, so as to enhance the boundary between adjacent numbers and help to improve the accurate viewing of numbers.
[0012] A further improvement of the utility model is that the pointer is a trapezoidal frame structure as a whole, so that the number on the second disc can be circled by the pointer of the trapezoidal frame structure, which helps to improve the expression of the target number.
[0013] A further improvement of the present invention is that the edges of the first and second disks are chamfered.
[0014] A further improvement of the utility model is that the base as a whole is an inverted T-shaped structure, and a counterweight is arranged inside the base to ensure the overall device is in a stable state during use.
[0015] A further improvement of the utility model is that a bearing is sleeved on the base, and the center of the second disc is sleeved on the outer ring of the bearing, so that the rotation flexibility of the second disc on the base is improved by the bearing.
[0016] A further improvement of the utility model is that a washer capable of pressing the bearing is provided on the base above the bearing, which helps to prevent the bearing from sliding outward.
[0017] It can be seen from the above technical scheme that the beneficial effects of the utility model are: the base supports disk one and disk two, and disk two can rotate relative to disk one, which helps to improve the operating experience. The pointer points to the numbers on disk two, which can accurately and quickly find the number, demonstrating the intuitiveness of the calculation; combined with the hands-on operation experience, it increases the fun of mathematical calculations and enhances interest in learning. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the technical solution of the utility model, the drawings required for use in the description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0019] Figure 1 It is a structural schematic diagram of a specific implementation method of the utility model.
[0020] Figure 2 It is a schematic diagram of the explosion structure of a specific implementation method of the utility model.
[0021] In the attached figure: 1. base; 2. bearing; 3. washer; 4. disc one; 5. disc two; 6. pointer; 7. character dividing line. DETAILED DESCRIPTION
[0022] In order to make the purpose, features and advantages of the utility model more obvious and easy to understand, the technical scheme of the utility model will be clearly and completely described below in combination with the drawings in the specific embodiment. Obviously, the embodiments described below are only part of the embodiments of the utility model, not all of them. Based on the embodiments in this patent, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this patent.
[0023] As attached Figure 1-2 As shown, a calculator for addition and subtraction within a circle of 20 includes a base 1, the base 1 is an inverted T-shaped structure as a whole, and a counterweight is arranged inside the base 1. This ensures that the overall device is in a stable state of use. The base 1 is a variable diameter structure, and a bearing 2 is sleeved on it. A washer 3 capable of pressing the bearing 2 is arranged on the base 1 above the bearing 2, and the washer 3 is installed on the base 1 with an interference fit. This helps prevent the bearing 2 from sliding outward.
[0024] The upper end of the base 1 is provided with a disc 1 4, and the lower part of the disc 1 4 is provided with a disc 2 5 rotatably mounted on the base 1; the center of the disc 2 5 is sleeved on the outer ring of the bearing 2 with an interference fit. The bearing 2 improves the rotation flexibility of the disc 2 5 on the base 1.
[0025] The diameter of the disk 1 4 is smaller than that of the disk 2 5. This facilitates the rotation of the disk 2 5. The disk 1 4 and the disk 2 5 are both provided with numbers that can be formed by adjustment. The numbers on the disk 1 4 are arranged around the edge of its upper surface, and the numbers on the disk 2 5 are arranged around the edge of its upper surface. This facilitates the observation of the numbers. The disk 1 4 and the disk 2 5 are both provided with a character dividing line 7, and the character dividing line 7 is arranged between two adjacent numbers. This strengthens the boundary between adjacent numbers and helps to improve the accurate viewing of numbers.
[0026] The numbers on the disc one 4 are 0-19, the numbers on the disc two 5 are 1-20, and the numbers on the disc one 4 and the numbers on the disc two 5 are arranged in the opposite order.
[0027] The disc 1 4 is provided with a pointer 6 pointing to the number on the disc 2 5. The pointer 6 is a trapezoidal frame structure as a whole. The number on the disc 2 5 can be circled by the pointer 6 of the trapezoidal frame structure, which helps to improve the expression of the target number.
[0028] The edges of the disk 1 4 and the disk 2 5 are chamfered.
[0029] To sum up, the working principle of the device is: when the number 20 on disk 2 5 corresponds to the empty number above disk 1 4 (i.e. the position of 0), the sum of the corresponding numbers on disk 2 5 and disk 1 4 is 20; when disk 1 4 does not move and disk 2 5 rotates one grid counterclockwise, the number on disk 2 5 corresponding to the empty number above disk 1 4 is 19. At this time, the sum of the corresponding numbers on disk 2 5 and disk 1 4 is 19 or 39 (this part should be ignored), and so on. Addition and subtraction within 20 can be easily calculated.
[0030] It should be noted that this device cannot calculate 1-1 equations; and only a part of it is involved in the calculation. (For example, when calculating addition and subtraction within 17, the 1-17 on disk 2 5 and the corresponding disk 1 4 are the calculation range scale). When calculating subtraction, the pointer 6 points to the numbers in disk 2 5, and any set of relative numbers on disk 1 4 and disk 2 5 (any number of the two numbers needs to be less than the number pointed by the pointer 6) is the two fractions of the number pointed by the pointer 6, and the subtraction can be quickly completed.
[0031] The utility model discloses a circular addition and subtraction calculator within 20, which supports a first disk and a second disk through a base. The second disk can rotate relative to the first disk, which helps to improve the operation experience. The pointer points to the numbers on the second disk, which can form accurate and fast positioning, showing the intuitiveness of the operation. The hands-on operation experience increases the fun of mathematical calculations and improves the interest in learning.
[0032] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same and similar parts between the various embodiments can be referenced to each other.
[0033] The terms "upper", "lower", "outer side", "inner side", etc. in the specification and claims of the utility model and the above-mentioned drawings are used to distinguish the relative relationship in position if they exist, and do not need to be qualitative. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the utility model described here can be implemented in an order other than those illustrated or described here. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.
[0034] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A circular addition and subtraction calculator within 20, comprising a base (1), characterized in that: A disc 1 (4) is provided at the upper end of the base (1), and a disc 2 (5) rotatably mounted on the base (1) is provided below the disc 1 (4); the disc 1 (4) and the disc 2 (5) are both provided with numbers that can be formed by adjustment, and the disc 1 (4) is provided with a pointer (6) pointing to the number on the disc 2 (5); the base (1) is an inverted T-shaped structure as a whole, and a counterweight is provided inside the base (1); a bearing (2) is sleeved on the base (1), and the center of the disc 2 (5) is sleeved on the outer ring of the bearing (2); a washer (3) capable of pressing the bearing (2) is provided on the base (1) above the bearing (2).
2. A circular addition and subtraction calculator within 20 according to claim 1, characterized in that: The diameter of the first disk (4) is smaller than the diameter of the second disk (5).
3. A circular addition and subtraction calculator within 20 as claimed in claim 2, characterized in that: The numbers on the first disk (4) are arranged around the edge of its upper surface, and the numbers on the second disk (5) are arranged around the edge of its upper surface.
4. A circular addition and subtraction calculator within 20 as claimed in claim 3, characterized in that: The first disc (4) and the second disc (5) are both provided with a character dividing line (7), and the character dividing line (7) is arranged between two adjacent numbers.
5. A calculator for adding and subtracting numbers within a circle of 20 according to any one of claims 1 to 4, characterized in that: The pointer (6) is in the form of a trapezoidal frame.
6. A circular addition and subtraction calculator within 20 as claimed in claim 5, characterized in that: The edges of the first disk (4) and the second disk (5) are chamfered structures.