JPH0526598Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention relates to a practice device used for practicing arithmetic.

(Prior art and problems to be solved) In the lower grades of elementary school, learning arithmetic such as multiplication and addition is an important learning topic. Learning multiplication and addition requires repeated practice, and is generally practiced using paper. However, students may get bored with simple repeated practice, so if there is a device that allows them to practice without getting bored, it can be expected to have a great effect on learning. And the easier it is to practice repeatedly, the more effective it will be.

In view of these problems, the present inventor has devised a practice device that can easily practice arithmetic such as multiplication and addition. That is, an object of the present invention is to provide an arithmetic practice device that can be easily operated even by elementary school children and allows repeated practice of multiplication, addition, etc.

(Means for Solving the Problem) The present invention has the following configuration to achieve the above object.

In other words, the plate surface is divided in the circumferential direction and also in the radial direction to form small sections with the longitudinal direction facing the circumferential direction, and among these small sections, those located on the outer peripheral side of the plate surface are For example, write in arithmetic problem formulas that display larger numbers such as 9, 8, etc. for multiplicands, and enter smaller numbers such as 2, 1, etc. for those located on the inner periphery of the board surface. A rotary plate on which numbers are written, the rotary plate is rotatably supported by supporting the center of the rotary plate, and at least the surface of the rotary plate on which the problem formula, etc. is written is covered almost entirely. It is characterized by having a display board that displays the problem formula and the answer corresponding to the problem formula by rotating a rotary plate, and a window corresponding to the arrangement position of the small compartment portion is provided through the window. shall be.

(Function) By rotating the rotary plate relative to the display board, the problem formula and the corresponding answer written on the surface of the rotary plate are displayed in the window of the display board. The small sections formed on the plate surface of the rotating plate are located on the outer periphery of the plate surface but have a large area, so they are extremely effective when displaying large numbers such as 9 and 8 with multiplicands such as ●. It will be done.

(Embodiments) Hereinafter, preferred embodiments of the present invention will be described in detail based on the accompanying drawings.

FIG. 1 is a front view showing an embodiment of the arithmetic practice device according to the present invention, and FIG. 2 is a back view.

In the figure, 10 is a rotary plate formed in a thin disk shape, 12 is a front plate that is a display plate that covers the front side of the rotary plate 10, and 14 is a back plate that is a display plate that covers the back side of the rotary plate 10. be.

Both the top plate 12 and the back plate 14 are formed into a thin flat plate shape, and a through hole is bored in the center of the rotary plate 10, the top plate 12, and the back plate 14, through which the support shaft 16a passes through the front and back surfaces. . Clamps 16b and 16c are attached to both ends of the support shaft 16a, and the top plate 12
and the back plate 14 are held between clamping tools 16b and 16c, and the rotary plate 10 is held so as to slide and rotate between the front plate 12 and the back plate 14. The clamping tool 16
b and 16c are not particularly limited in shape as long as they can press the rotary plate 10 between the front plate 12 and the back plate 14. In the embodiment, one clamping tool 16b is formed to be screwed onto the support shaft 16a to adjust the clamping pressure.

In this embodiment, in order to facilitate rotational operation of the rotary plate 10, the outer circumferential shape of the front plate 12 and the back plate 14 is made into a regular nonagonal shape, and the peripheral edge of the rotary plate 10 is partially attached to the front plate.
2 and the outer periphery of the back plate 14. Further, at each vertex of the regular nonagon of the front plate 12 and the back plate 14, there is provided a front plate 12 for rotating the rotary plate 10.
A knob portion 18 is provided as a knob portion of the back plate 14.

On the rotary plate 10, multiplication formulas and their answers for arithmetic practice are written in a predetermined arrangement, but different contents are written so that different exercises can be performed on the front and back sides of the practice device.

Hereinafter, an example of writing on the rotary plate 10 and the configurations of the front plate 12 and the back plate 14 will be described.

First, the configurations of the rotating plate 10 and the top plate 12 will be explained. FIG. 3 is a front view showing the shape of only the top plate 12, and FIG. 4 is a front view showing the surface of the rotary plate 10 on the side facing the top plate 12. As shown in FIG. 3, the front panel 12 of this embodiment has a window 12a showing a multiplication formula such as 8×2, a window 12b showing the answer, and a window 12c showing the number of times. It is being

Further, the plate surface of the rotary plate 10 is from 1×1 to 9×9.
Support axis 1 so that all multiplication tables up to
It is divided equally in the circumferential direction around the insertion hole 6a (in the example, the plate surface is divided into 82 parts), and in each small section, a multiplication formula, the answer, and Chinese numerals indicating the number of times are written. ing. The arrangement of multiplication formulas, answers, and Chinese numerals is determined by the windows 12a and 12 provided on the top plate 12 when the rotary plate 10 and the top plate 12 are combined.
By combining the rotary plate 10 and the front plate 12, a predetermined display is made within the window of the front plate 12 as shown in FIG. In the example, the multiplication formula and the answer were placed in symmetrical positions across the center of the board so that the problem and the answer would not be close to each other.
The window position in can be set appropriately.

Note that although the example shows multiplication, the above display format is not limited to practicing multiplication, but can also be configured in the form of division, such as 8÷2, 10÷2, 12÷2, etc. Of course it is also possible. In addition, problem formulas can also be written in the form of addition or subtraction. In addition, rotating plate 1
The expressions displayed as 0 may be made to increase in number regularly from 1×1 as in the embodiment, or may be arranged randomly.

Next, the configuration of the back surface of the rotating plate 10 and the back plate 14 will be explained.

FIG. 5 is a front view showing only the back plate 14, and FIG. 6 is a front view showing the back side of the rotating plate 10. Rotating plate 1
As shown in Figure 6, the back side of 0 has fan-shaped sections divided into nine equal parts in the circumferential direction around the center of the rotary plate, and each fan-shaped section is divided from the inner circumference to the outer circumference. It is divided into nine small sections. The small sections are set at equal intervals in the radial direction, and therefore the small sections on the outer circumferential side have a larger area than the small sections on the inner circumferential side. Note that the multiplicands of the small sections on the same circumference are the same, and the multiplicands are written so that they increase sequentially from the inner circumference to the outer circumference.

In the example, in order to help students understand multiplication visually, we devised a way to represent numerical values by the number of ●. For example, twice 3 is displayed as "XX times ●●●". Therefore, those with large multiplicands are arranged on the outer periphery side where the area of the small section can be large.

As shown in FIG. 5, the back plate 14 has a window 14a for displaying questions and a window 1 for displaying the answers.
Open 4b. The window 14a for displaying the problem is 1 corresponding to the 9 multiplicands from 1 to 9 on the rotating plate 10.
A total of nine windows 14b are provided for each question, and one window 14b for displaying answers corresponding to the questions.
There will be a total of nine. As a result, a total of 18 windows are transparently provided on the back plate 14. The windows 14a for displaying the questions are transparently provided one by one on the same circumference of each of 1 to 9, but in the embodiment, the position of the window 14a is shifted from the inner circumference to the outer circumference by one section in the radial direction, and It is arranged so that it is shifted one fan-shaped section at a time in the circumferential direction. Further, the window 14b for displaying the answer is arranged at a symmetrical position across the center of the board surface with respect to each of the windows 14a of 1 to 9 so as to correspond to the window 14a for displaying the question. That is, as shown in FIG. 5, a window 14a for displaying questions and a window 14b for displaying answers are arranged so as to extend outward in a spiral shape from near the center of the board surface.

FIG. 2 shows the state in which the back surface of the rotary plate 10 and the back plate 14 are combined. As shown in the figure, nine questions with multiplicands from 1 to 9 and their answers are displayed in the window of the back plate 14. Is displayed. As mentioned above, questions and answers are displayed in correspondence with each other across the center of the board on the board, but by color-coding the corresponding questions and answers from 1 to 9, it is easier to see when using the board. be able to.

In addition, since the window 14a of the back plate 14 has a fairly large area, in addition to the display example shown in this embodiment, in order to display the number specifically, it is possible to display the shape of a specific item, such as the shape of an apple. It is possible to adopt various easy-to-understand expression methods such as In addition, to practice addition, etc., “2+
It can also be expressed as ``●●tas●'' to express something like ``1''.

When using the above-mentioned practice device, rotate the rotary plate 10 appropriately and read the equation in question on the front plate 12 or back plate 14.
Practice by displaying it in the window.

According to the arithmetic practice device of this embodiment, by rotating the rotary plate 10 as appropriate, you can easily change the questions and practice, and the answers can be checked immediately, making it extremely easy to practice arithmetic. can do. In addition, by rotating the rotary plate, it is possible to easily perform repeated exercises and practice many times. Furthermore, since the robot can be practiced along with the operation of rotating the rotary plate, it is effective for the children to practice with interest.

Note that the rotating plate 10, the front plate 12, and the back plate 1
The material of 4 and the like is not particularly limited, and can be formed of paper, plastic sheet, or the like.

The present invention has been variously explained above using preferred embodiments, but the present invention is not limited to these embodiments, and it goes without saying that many modifications can be made without departing from the spirit of the invention. That's true.

(Effects of the invention) According to the invention, as described above, by rotating the rotary plate, it is possible to change and display arithmetic problem formulas such as multiplication and addition as appropriate, and to practice multiplication tables, etc. can be easily practiced repeatedly. In addition, it is extremely easy to handle,
It can be easily operated even by children. Also, since it is interesting to manipulate the rotary board to represent various problem formulas, it is effective in allowing you to practice repeatedly without getting bored.

[Brief explanation of drawings]

Fig. 1 is a front view of one embodiment of the arithmetic practice device according to the present invention, Fig. 2 is a rear view, Fig. 3 is a front view of the top plate, Fig. 4 is a front view showing the front of the rotary plate, FIG. 5 is a front view of the back plate, and FIG. 6 is a front view showing the back surface of the rotary plate. 10...Rotating plate, 12...Top plate, 12a, 12
b, 12c... window, 14... back plate, 14a, 14
b... window, 16b, 16c... clamping tool, 18...
Knob section.

Claims (1)

[Claims for Utility Model Registration] When dividing a board surface in the circumferential direction and radial direction to form small sections with the longitudinal direction facing the circumferential direction, and displaying arithmetic problem formulas on these small sections, problems arise. Display the number displayed by the formula using concrete indicators such as ●,
For the small section located on the outer periphery of the board surface,
For example, a rotating plate in which the multiplicand displays larger numbers such as 9, 8, etc., and smaller numbers such as 2, 1, etc. are displayed in the small section located on the inner peripheral side of the plate surface; The center of the rotary plate is supported so that the rotary plate can be freely rotated, and at least the surface of the rotary plate on which arithmetic problem formulas, etc. are written is covered almost entirely, and at the location of the small section. 1. An arithmetic practice device characterized by having a corresponding transparent window and a display board that displays a problem formula and an answer corresponding to the problem formula by rotating a rotary plate.