JPH0738929Y2 - Math teaching tools - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a math teaching tool for setting and using a math disc on which a plurality of math problems are printed.

[0002]

2. Description of the Related Art Conventionally, there has been no arithmetic teaching tool similar to the present invention.

[0003]

An object of the present invention is to set an arithmetic disc on a rotary dial, and to think about an answer in a state in which a desired arithmetic problem of the arithmetic disc is matched with a problem matching portion of a case cover. An object of the present invention is to provide an arithmetic teaching tool for lower grades, which can confirm the correctness of this answer by checking the number of times the slide holder can be latched.

[0004]

In order to achieve the above-mentioned object, an arithmetic training tool of the present invention has a circular case part and a grip case part covered with a case cover, and a holder having an end opening in the grip case part. A main body case provided with a guide part and a problem matching part on the cover, a cam gear having ratchet teeth on the outer periphery and rotatably held by a central shaft supporting part of a circular case part, and rotation start of this cam gear A stopper means for restricting a rotation angle that is stopped at a position and a rotation end position that is within a predetermined angle range from the start position, a slide holder slidably fitted in a holder guide portion of the case, and the holder. A return spring that urges the case outward, and that engages with the ratchet teeth when the holder moves back and forth, and engages with the ratchet teeth when the holder returns. The latch claw has a feed latch that disengages and intermittently rotates the cam gear one tooth at a time, a latch claw that engages and disengages the ratchet tooth, and a rotation operation unit that releases the engagement of the latch claw by an external operation. A reverse rotation stop latch biased by a spring to engage with the ratchet teeth, and a cam gear when the claw engagement of the reverse rotation stop latch is released by the spring force accumulated by the rotation of the cam gear due to the latch feed. For returning to the rotation start position, a rotary dial provided in the circular opening of the case so that it can be manually rotated, and a protrusion provided on the rear surface of the rotary dial so that the dial is unidirectional. And the dial are integrated with the dial, and a tooth feed projection that engages with a part of the cam gear when rotated to rotate the cam gear one tooth at a time with the feed latch engaged and disengaged. And a replaceable arithmetic disc that is positioned and set to rotate, wherein a plurality of arithmetic problems are located in the angular region corresponding to the rotation angle of the cam gear and of the ratchet teeth. Printing is performed with an angular interval equal to the pitch angle, and the answer to the arithmetic problem matched with the problem matching part of the cover by turning the dial can be confirmed by the number of times the slide feed of the slide holder is possible. To do. According to the math learning tool of claim 2, a marking body protruding outward from the opening end of the holder guide portion is fixed to the case, and a slide holder for accommodating the marking body projects from the marking portion. The present invention is characterized in that it is configured as a stamp-type latch moving body which has a holder opening portion and which can be imprinted by retreating movement by pressing the holder opening portion against a paper surface.

[0005]

According to the math learning tool of claim 1, the math disc is set on the rotary dial, and the answer is considered in a state where the desired math problem of the math disc is aligned with the problem matching portion of the case cover,
You can confirm the correctness of this answer by counting the number of movements of the slide holder that can be latched,
According to the arithmetic training tool of claim 2, the correctness of the answer to the question can be confirmed by counting the number of imprints by pressing the slide holder on the paper.

After confirming the answer as described above, the claw engagement of the reverse rotation stop latch is released, the cam gear is returned to the rotation start position, and another arithmetic problem of the dial set disc is adjusted to the problem matching portion. If the holder is continuously moved or imprinted, the correctness of the answer can be similarly confirmed by counting the number of times the holder is moved or the number of imprints.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be specifically described below with reference to the drawings.

In the figure, reference numeral 1 is a main body case integrally formed of transparent or opaque synthetic resin, and the main body case 1 is a gripping case portion 3 covered with a circular case portion 2 and a case cover 4.
The holder guide portion 5 having an end opening is provided in the grip case portion 3, and the problem matching portion 6 of the triangular index is provided on the upper portion of the cover 4.

Reference numeral 7 has a predetermined number of teeth, for example, 16 ratchet teeth 8 (the pitch angle between the teeth is set to 12 degrees) on the outer periphery, and a rotation angle is provided at the end of the back surface arc edge 9. The restriction stopper 10 is a cam gear made of synthetic resin having a protrusion as shown in FIG. 2, and the center hole of the gear is formed in the center shaft support portion 2a of the circular case portion 2.
And is rotatably held by fitting as shown in FIG.

Reference numeral 11 is a first stopper for stopping the rotation of the cam gear 7 at the rotation start position by contact of the rotation angle regulating stopper 10 of the cam gear 7 as shown in FIG. 2, and 12 is the rotation of the cam gear 7. The second stopper 11 is brought into contact with the first stopper 11 as shown in FIG. 6 to stop at a rotation end position which is within a predetermined angle range (120 degree angle range in the embodiment) from the rotation start position regulated by the first stopper 11. With the stopper, the first stopper 11 and the second stopper 12 are circular case portions 2
The stopper means is integrally provided on the inner bottom surface of the shaft to limit the rotation range of the cam gear 7 to 120 degrees.

Reference numeral 13 denotes a stamp which is fixed to the case 1 by projecting outward from the opening end of the holder guide portion 5, and numeral 15 allows the stamp 13 to be housed inside and moved forward and backward in the guide portion 5. A slide holder slidably fitted to the holder 1
5 is urged by a return spring 16 to the outside of the case so that the intermediate partition wall abuts the inner end of the stamp 13 as shown in FIG.

In the case of the present embodiment, the holder 15 has a holder opening portion 15a which projects outward from the stamp portion 14 and can be imprinted by a retreat movement by pressing the holder opening portion against the paper surface. Although it is configured as a stamp-type latch moving body, it may be configured as a latch moving body that is moved forward and backward by a push operation of the holder head.

Numeral 17 engages with the ratchet teeth 8 when the holder 15 retreats, and disengages from the ratchet teeth 8 when the holder 15 returns, as shown in FIG. Is a feed latch that is rotated in an axial direction, is pivotally supported by a pivot pin 18 so that it can be retracted from the guide hole in the inner end of the holder 15, and is rotated in one direction (counterclockwise direction in FIG. 1) by a compression spring 19. It is energized.

Reference numeral 20 denotes a rotatable reverse rotation stop latch pivotally supported by a pivot pin 21 at the gear approaching position of the case 1, and the reverse rotation stop latch 20 has a latch claw 22 which engages and disengages with the ratchet teeth 8 and a case. The lever 25 has a lever-shaped turning operation portion 23 which projects from the upper end hole 24 to the outside of the case to release the engagement of the latch claw 22 by an external operation, and the spring 25 so that the latch claw 22 engages with the ratchet teeth 8. It is urged to rotate by.

A spring force 26 is accumulated by the rotation of the cam gear 7 by the latch feed, and when the claw engagement of the reverse rotation stop latch 20 is released by an external operation, the accumulated spring force causes the cam gear 7 to rotate.
To a rotation start position (a state in which the rotation angle regulation stopper 10 contacts the first stopper 11 as shown in FIGS. 1a and 2), one end of which is an arc edge spring hook portion of the cam gear 7. A torsion spring as shown in FIG. 2 is used, which is locked to 27 and the other end is locked to a spring hook portion 28 on the inner surface of the case.

A rotary dial 30 is pivotally supported by a pivot pin 31 as shown in FIG. 3 so that it can be manually rotated in the circular opening 29 of the case 1.
When the dial is rotated in one direction (the direction shown in FIG. 1b), the rear surface of the cam gear 7 is a part of the cam gear 7 (in the embodiment, the tooth row rear end 8a of the ratchet tooth 8). It may be a pin projection or the like provided in the vicinity of the rear end of the row) to rotate the cam gear 7 one tooth at a time with the feed latch 17 disengaged. And a disc set recess 34 having a pair of protrusions 33 for positioning the arithmetic disc 35 is provided on the upper surface of the dial 30.

The arithmetic disc 35 has a pair of outer peripheral notches 36 that engage with the protrusions 33, and is positioned and set in the disc setting recess 34 of the dial 30 so as to rotate integrally with the dial. In the arithmetic disc 35, a plurality of arithmetic problems Q are located in an angular region of 120 degrees corresponding to the rotation angle of the cam gear 7 and the pitch angle of the ratchet teeth 8 is changed. Printed as shown in FIGS. 1 (a) and 4 (a) (b) with an angular interval of 12 degrees, which is the same as It can be fitted to the problem matching portion 6 of the cover 4 by rotating the dial 30.

Then, the dial 30 is rotated in the direction of arrow a shown in FIG. 1B to set the second problem Q2 of the problem Q (when the arithmetic disk 35 shown in FIG. 4 is set. Refers to the third problem Q3) and the problem matching section 6 of the cover 4
, The cam gear 7 is rotated by two teeth by the tooth feed action of the dial tooth feed protrusion 32, and the rotation angle regulation stopper 10 of the cam gear 7 is rotated by the first stopper 11.
To the separated state as shown in FIG. At this time, the number of teeth that can be claw-fed by the feed latch 17 between the rotation angle regulation stopper 10 of the cam gear 7 and the second stopper 12 is "8".

Therefore, when the problem Q2 or the problem Q3 is matched with the problem matching portion 6 of the cover 4, the stamping operation by pressing the holder 15 on the paper surface can be performed eight times, and the stamping operation is performed eight times. The cam gear 7 is rotated by 8 teeth by the tooth feeding action of the feed latch 17 related to
The rotation angle regulation stopper 10 of the cam gear 7 comes into contact with the second stopper 12 as shown in FIG. 6 and further tooth feeding becomes impossible. Therefore, the problem Q2 or the problem Q3 is matched with the problem matching portion 6. The answer to the question Q2 by counting the number of imprints by pressing the holder 15 on the paper surface
Alternatively, the correctness of the answer to question Q3 (in the case of the previous example, the answer is 8) can be confirmed.

Further, in the state shown in FIG. 6, when the rotation operating portion 23 of the reverse rotation stop latch 20 is operated to release the engagement of the latch claw 21, the cam gear 7 is stored in the rotation return spring 26. Since the force is returned to the rotation start position (the rotation angle regulation stopper 10 is in contact with the first stopper 11 as shown in FIGS. 1a and 2), another arithmetic problem of the dial set disc 35 is generated after this return. If Q is adjusted again to the problem matching section 6 and the holder 15 is continuously imprinted, the correctness of the answer can be similarly confirmed by counting the number of times the holder 15 is moved or the number of imprints.

Reference numeral 37 in the drawing denotes a stepping piece fixed to the outer peripheral surface of the back surface of the rotary dial 30, and its base end mounting portion abuts the inner end projection 38 of the circular case portion 2 as shown in FIG. Position of the dial 30 is regulated as shown in FIG. 1B, and the concave portion of the tip of the elastic piece of the piece 37 is formed on the inner peripheral surface ridge 39 of the circular case portion 2 (in the circumferential direction, 1
(It is projected with an angular interval of 2 degrees)
The rotation of the dial 30 at each problem matching position can be intermittently locked.

In the above-described embodiment, the maximum number of teeth fed by the feed latch 17 to the cam gear 7 (the number of teeth fed by the feed latch 17 in the state shown in FIG. 1) is set to 10 and the arithmetic disc 35 is used.
The problem Q was described as a problem in which an integer answer from 1 to 10 was given. However, the tooth feed number is set to 15 teeth, and the problem Q of the arithmetic disk 35 is a foot from which an answer from 1 to 15 is given. Modifications such as arithmetic problems and subtraction problems are possible, and such problems are also included in the scope of the present invention.

[0023]

[Effects of the Invention] Since the arithmetic teaching tool of the present invention is based on the structure described in the scope of claims for utility model registration, an arithmetic disc is set on the rotary dial, and the desired arithmetic disc of this arithmetic disc is set. The answer is considered in the state that the problem is matched to the problem matching part of the case cover, and the correctness of this answer can be confirmed by the number of movements or the number of imprints that can be latched by the slide holder. .

[Brief description of drawings]

FIG. 1 is an explanatory view of the configuration of an arithmetic training tool according to an embodiment of the present invention, in which FIG. 1 (a) is a sectional view showing a state where a cam gear is stopped at a rotation start position, and FIG. The front view which looked at the arithmetic training tool of the same state from the rotary dial side.

FIG. 2 is a cutaway rear view of an essential part of the arithmetic training tool of FIG. 1 (b) seen from the back side.

FIG. 3 is a transverse cross-sectional view taken along the line AA of FIG.

FIG. 4 is a plan view showing another embodiment of the arithmetic disk set on the dial.

FIG. 5 is a sectional view showing the teaching tool in a state where two teeth are fed from the rotation start position of the cam gear.

FIG. 6 is a sectional view showing the teaching tool in a state in which a cam gear is rotated to a rotation end position.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Main body case, 2 ... Circular case part, 2a ... Central shaft support part, 3 ... Grip case part, 4 ... Case cover, 5 ... Holder guide part, 6 ... Problem matching part, 7 ... Cam gear, 8 ... Ratchet tooth, 10 ... Rotation angle regulation stopper, 11 ... First stopper, 12 ... Second stopper, 13 ... Stamp, 14 ... Stamp part, 15 ... Slide holder, 16 ... Return spring,
Reference numeral 17 ... Feed latch, 19 ... Compression spring, 20 ... Reverse rotation stop latch, 22 ... Latch claw, 23 ... Rotating operation part, 25
... Spring, 26 ... Spring for returning rotation, 27, 2
8 ... Spring hooking part, 30 ... Rotating dial, 31 ... Pivot pin, 32 ... Tooth feed protrusion, 33 ... Disc positioning protrusion, 34
… Disc set recess, 35… Arithmetic disc, Q… Arithmetic problem, 3
6 ... Outer peripheral notch, 37 ... Stepping piece.

Claims (2)

[Scope of utility model registration request] 1. A main body case having a circular case portion and a grip case portion covered with a case cover, a holder guide portion having an end opening provided in the grip case portion, and a problem matching portion on the cover, and a ratchet on the outer periphery. A cam gear having teeth and rotatably held on the central shaft support portion of the circular case portion, and rotation of the cam gear is stopped at a rotation start position and a rotation end position within a predetermined angle range from the start position. A stopper means for restricting a rotation angle, a slide holder slidably fitted in a holder guide portion of the case, a return spring for urging the holder to the outside of the case, and a holder provided in the holder. A feed latch that engages with the ratchet teeth during the retreat movement and disengages from the ratchet teeth during the return movement of the holder to intermittently rotate the cam gear by one tooth; A latch claw that engages with and disengages from the ratchet teeth, and a rotation operating portion that releases the engagement of the latch claw by an external operation. The reverse rotation stop is biased by a spring so that the latch claw engages the ratchet teeth. The latch, a spring for returning the cam gear to the rotation start position when the spring force is accumulated by the rotation of the cam gear due to the latch feed and the claw engagement of the reverse rotation stop latch is released, and the circular opening of the case. And a rotary dial provided on the back of the rotary dial so as to be rotatable by a manual operation, and a cam that engages with a part of a cam gear when the dial is rotated in one direction when the rotary dial is rotated in one direction. A tooth feed projection for sequentially rotating the gear by one tooth with the feed latch engaged and disengaged, and a replaceable arithmetic disc that is positioned and set on the dial so as to rotate integrally with the dial. However, a plurality of arithmetic problems are printed on the arithmetic disc in an angular region corresponding to the rotation angle of the cam gear and at an angular interval equal to the pitch angle of the ratchet teeth. An arithmetic training tool characterized in that the answer to the arithmetic problem matched by rotating the dial can be confirmed by the number of times the slide movement of the slide holder is possible. 2. A stamp body protruding outward from an opening end of a holder guide section is fixed to the case, and a slide holder for accommodating the stamp body has a holder mouth section projecting from the stamp section. 2. The math learning tool according to claim 1, wherein the math learning tool is configured as a stamp-type latch moving body that can be imprinted by retreating movement by pressing the holder mouth portion against the paper surface.