JPH0542450Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a correct answer display device for a manual calculation practice device that does not use batteries or the like.

Conventionally used correct answer display devices display, for example, multiplicands and multipliers together with multiplication symbols on the front side of each rectangular block divided into matrices, and on the back side, an elastic display device has black paper with the correct answer numbers punched out attached to it. A dark-colored transparent surface plate and a white board are placed on the underside of this board with a slight gap left behind, so that when the learner presses each block with his or her finger, the correct answer numbers on the board are visible and visible. It is configured.

This conventional product has the disadvantage that it is difficult to see the entire correct answer number because it is pressed with a finger, and the restoring elasticity of the elastic surface plate decreases with use, so that the correct answer is always visible.

In this project, the colored surface board is a hard board, and each block is left blank with a white board to display the correct answer.
It is configured to be rotatable within a range of 90 degrees, and each block is provided with an answer operation rod that engages with the white plate so that it can come out and go out, and when the operation rod is pressed, the white plate comes close to the colored surface plate and the answer is correct. It is designed to bring out the

According to the present invention, the correct answer digits are not easily visible before answering, but are clearly displayed when answering operations are performed.

Furthermore, since the rotating white plate and the operating rod are only in an engaging relationship, assembly is easy and operation is reliable.
It also has the advantage of not breaking down because it requires fewer components.

Examples of the proposed product will be described below with reference to the drawings.

Reference numeral 1 denotes the main body of the training device, which is composed of a frame with a thickness of 1 to 2 cm, and is partitioned into rows and columns by partition plates 2 and 3 to form rectangular empty chambers 4.

5 is a dark reddish-brown transparent plate that covers the top surface of each vacant room block, and the multiplier and multiplicand are displayed on the front side, and the black paper or paint 6 with the correct answer number 7 punched out on the back side.
is pasted or painted.

The inner walls of each vacant room block are also painted black.

Reference numeral 10 is a rectangular white plate, and one side 12 of the plate is pivotally attached to a pivot shaft 11 that is arranged in common in each row, for example, so that it can rotate freely within each cavity.
An engaging notch step 14 is recessed in the end edge 13 of the pivoting portion 12 of the white plate.

Reference numeral 15 denotes a response operating rod which is disposed so as to be able to appear and retract from each empty chamber, the upper end 16 of which is projected onto the transparent plate as a pressing portion, and the intermediate portion thereof has a protrusion 17 that engages with the engaging stepped portion 14 of the white plate. It is equipped with

18 is a coil spring for return, and 19 is a sliding guide frame.

In this product, a multiplicand and a multiplier are displayed for each block, and when you want to get the correct answer that is the product of the multiplicand and press the answer operation lever of the block, the engaging protrusion 17 engages with the stepped part 14 and the color turns white. Plate 10 to pivot 11
The white plate is brought into contact with or close to the back surface of the colored transparent plate by rotating around .

Then, the number displayed as a transparent part on the colored transparent plate, that is, the shape of the correct answer, becomes clearly visible.

The shape of the correct answer number displayed as a transparent part on the colored transparent board is arbitrary.

When the correct answer is confirmed and the pressure on the operating rod 15 is released, the operating rod is restored by the return spring 18, and the white plate 10 is disengaged and hangs down due to its own weight, so that the correct answer number cannot be visually recognized. becomes.

6 and 7 show another embodiment of the operating rod, in which the operating rod 20 is formed of elastic plastic or a metal plate into a square shape except for the protruding pressing part 16, and at least one of the operating rods 20 is made of elastic plastic or a metal plate. The lower end is extended and inclined 23 to provide a spring action.

Since both sides 21 and 22 of this operating rod are guided by both walls of the block cavity, two sides of the sliding guide frame can be omitted and only the guide wall 25 is required.
3 has the advantage of being formed at the same time.

Further, both shoulder portions 24 automatically serve as upper end stoppers for stability.

In addition, it is also possible to make both shoulder parts 24 project above the transparent surface plate as shown by the dashed-dotted line in FIG. 6, and to use them as pressing parts.

The leaf spring acceptance part 26 can be omitted.

The present invention can be applied not only to multiplication practice machines but also to various calculation practice machines such as addition and subtraction.

[Brief explanation of drawings]

Fig. 1 is a plan view of the proposed product, Fig. 2 is a plan view showing how the correct answer numbers are displayed on the colored transparent board, Fig. 3 is a plan view of the white board, and Fig. 4 is a cross-sectional view of each block vacancy. , FIG. 5 is a cross-sectional view taken along the - line in FIG. 4, and FIGS. 6 and 7 are cross-sectional views showing other embodiments of the response operation lever. 4...Block empty room, 5...Colored transparent board, 6...
...Transparent number display coating or backing paper, 10...White board, 15...Operation rod.

Claims (1)

[Claims for Utility Model Registration] (1) A large number of rectangular vacant rooms partitioned into rows and columns by partition plates, and a plurality of numerical values to be calculated that cover all of the vacant rooms are displayed together with operation symbols. and a colored transparent board with a transparent part so that the correct answer numbers cannot be seen, and a calculation practice device in which a white board approaches the bottom surface of the colored transparent board and the correct answer numbers are displayed by answering each empty room. A sliding guide frame for retractably accommodating a response operating rod having an engaging protrusion is disposed on one side of the cavity, and a pivot for rotation is inserted through one side of the white plate, and the pivot of the white plate is disposed. A correct answer display device for a calculation practice device, wherein a side edge is provided with a cutout step that engages with an engaging protrusion of the answer operation rod. (2) The correct answer display device according to claim 1 of the utility model registration claim, wherein the answer operation lever is provided with a return coil spring. (3) The correct answer display device according to claim 1, wherein the answer operation rod is constituted by a frame-like member whose lower end is formed as an inclined plate spring.