CN214984481U - Primary school mathematics polygon learning tool - Google Patents

Primary school mathematics polygon learning tool Download PDF

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Publication number
CN214984481U
CN214984481U CN202120396061.XU CN202120396061U CN214984481U CN 214984481 U CN214984481 U CN 214984481U CN 202120396061 U CN202120396061 U CN 202120396061U CN 214984481 U CN214984481 U CN 214984481U
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China
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groove
block
square
spring
gear
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Expired - Fee Related
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CN202120396061.XU
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Chinese (zh)
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郑盼盼
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Individual
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Individual
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Abstract

The application discloses primary school's mathematics polygon learning tool, including cylinder piece, ring, sucking disc, reference ring, dwang, toper piece, spring one, spacing groove, fastening bolt, nut, rotational pin, gear, arc rack, spring two, miniature bearing, logical groove, pointer, square, T type piece, spring three, fixture block and draw-in groove. This application rotates the dwang, the dwang rotates and drives the rotation pin and rotate, the rotation pin rotates and drives the gear and rotate, gear revolve extrudees the arc rack, make the arc rack remove and extrude spring two, when the gear aligns with the arc rack reengagement, under the effect of two elastic forces of spring, the arc rack removes and the gear reengages, and then fix the dwang, the number of teeth on the gear is 360, therefore the gear once extrudees the arc rack, the dwang rotates 1, and then conveniently draws the regular polygon of different limits.

Description

Primary school mathematics polygon learning tool
Technical Field
The application relates to a polygon learning tool, in particular to a primary school mathematics polygon learning tool.
Background
Mathematical terms, a closed figure formed by connecting three or more line segments end to end in sequence is called a polygon. According to different standards, polygons can be classified into regular polygons and non-regular polygons, convex polygons, concave polygons, and the like.
The polygon learning tool that tradition used has certain defect, lacks installation mechanism, causes inconveniently to install the ring on the cylinder piece, and then inconveniently installs the cylinder piece on the blackboard through the sucking disc, lacks supplementary fixture simultaneously, causes the position of inconvenient fixed dwang of rotating, and then the inconvenient chalk of utilizing passes the round hole through-hole and draws a little, and inconvenient drawing regular polygon lacks coupling mechanism, and then inconvenient carries out the dismouting to the reference ring and maintains. Therefore, a primary school mathematics polygon learning tool is provided for solving the problems.
SUMMERY OF THE UTILITY MODEL
A primary school mathematics polygon learning tool comprises a cylindrical block, a circular ring, suckers, an indexing circular ring, a rotating rod, an installation mechanism, an auxiliary clamping mechanism and a connection mechanism, wherein the circular ring is installed on the annular side surface of the cylindrical block;
the mounting mechanism comprises a conical block, a first spring, limiting grooves, fastening bolts and nuts, wherein two grooves are symmetrically formed in the circular ring, the first spring is fixedly mounted in each groove, the conical block is fixedly mounted at one end of each spring, the two limiting grooves are symmetrically formed in the annular side surface of the cylindrical block, one end of each conical block extends into the limiting groove, the two fastening bolts are symmetrically mounted on the annular side surface of the circular ring, one end of each fastening bolt extends into each groove and is aligned with the corresponding conical block, the nuts are mounted on the annular side surfaces of the fastening bolts, and the outer sides of the nuts are fixedly mounted in the circular ring;
the auxiliary clamping mechanism comprises a rotating pin, a gear, an arc-shaped rack and a second spring, the rotating pin is fixedly mounted at the rear end of the rotating rod, a circular groove is formed in the front end of the cylindrical block, the rotating pin is mounted in the circular groove, the gear is fixedly mounted on the annular side surface of the rotating pin, the two second springs are symmetrically and fixedly mounted in the circular groove, the arc-shaped rack is fixedly mounted at one end of each of the two springs, and one end of the arc-shaped rack is meshed with the gear;
coupling mechanism includes square, T type piece, three springs, fixture block and draw-in groove, two squares of the inside symmetry fixed mounting of graduated ring, T type piece is installed to the square front end, install three springs on the T type piece annular side, and three both ends of spring laminate with T type piece and square respectively mutually, T type piece rear end passes square and fixed mounting has the fixture block, the inside draw-in groove of having seted up of ring, and the fixture block is installed inside the draw-in groove.
Furthermore, the installation mechanism is equipped with two sets of, two sets of installation mechanism structure is the same, and two sets of installation mechanism symmetry is installed inside the ring.
Furthermore, a miniature bearing is fixedly installed on the annular side face of the rotating pin, and the outer side of the miniature bearing is fixedly installed inside the circular groove.
Further, logical groove has been seted up to dwang front end intermediate position, and leads to inside fixed mounting of groove and have the pointer, the pointer aligns around with the reference circle, circular through-hole has been seted up to the dwang front end.
Furthermore, an annular groove is formed in the front end of the cylindrical block, a dividing ring is arranged inside the annular groove, two square grooves are symmetrically formed in the annular groove, and a square block is arranged inside the square groove.
Furthermore, the clamping groove is provided with a square groove and a cylindrical groove, the front end of the cylindrical block is provided with the square groove, the cylindrical groove is formed in the cylindrical block, the front end of the cylindrical groove is communicated with the square groove, and the size of the cross section of the clamping block is the same as that of the cross section of the square groove.
Furthermore, a round hole groove is formed in the front end of the square block, and one end of the T-shaped block is installed inside the round hole groove.
Furthermore, the square block is fixedly installed on the indexing ring through a first screw, and the fixture block is fixedly installed on the T-shaped block through a second screw.
Furthermore, the two groups of connecting mechanisms are arranged and have the same structure, and are symmetrically arranged at the front end of the cylindrical block.
Furthermore, the sucker is fixedly arranged on the circular ring through a first rivet, and the gear is fixedly arranged on the annular side face of the rotating pin through a second rivet.
The beneficial effect of this application is: the application provides a primary school's mathematics polygon learning tool with convenient installation ring and reference ring, convenient rotation and fixed dwang function.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.
FIG. 1 is a schematic overall structure diagram of an embodiment of the present application;
FIG. 2 is a top cross-sectional view of the overall structure of one embodiment of the present application;
FIG. 3 is a schematic view of an auxiliary clamping mechanism according to an embodiment of the present application;
FIG. 4 is a schematic view of an assembly structure of the reference ring and the cylindrical block according to an embodiment of the present application;
FIG. 5 is a schematic view of a coupling mechanism according to an embodiment of the present application;
fig. 6 is a schematic view illustrating an assembly structure of a latch and a slot according to an embodiment of the present application.
In the figure: 1. the device comprises a cylindrical block, 2, a circular ring, 3, a sucker, 4, a reference circular ring, 5, a rotating rod, 6, a conical block, 7, a first spring, 8, a limiting groove, 9, a fastening bolt, 10, a nut, 11, a rotating pin, 12, a gear, 13, an arc-shaped rack, 14, a second spring, 15, a miniature bearing, 16, a through groove, 17, a pointer, 18, a square block, 19, a T-shaped block, 20, a third spring, 21, a clamping block, 22 and a clamping groove.
Detailed Description
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be used. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
In this application, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. These terms are used primarily to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation.
Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meaning of these terms in this application will be understood by those of ordinary skill in the art as appropriate.
Furthermore, the terms "mounted," "disposed," "provided," "connected," and "sleeved" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
Referring to fig. 1-6, a primary school mathematics polygon learning tool comprises a cylindrical block 1, a circular ring 2, suckers 3, an indexing circular ring 4, a rotating rod 5, an installation mechanism, an auxiliary clamping mechanism and a connection mechanism, wherein the circular ring 2 is installed on the annular side surface of the cylindrical block 1, more than two suckers 3 are uniformly and fixedly installed at the rear end of the circular ring 2, the rotating rod 5 is rotatably installed at the middle position of the front end of the cylindrical block 1, one end of the rotating rod 5 extends to the outer sides of the cylindrical block 1 and the circular ring 2, and the indexing circular ring 4 is installed at the front end of the cylindrical block 1 in a clamping manner;
the mounting mechanism comprises a conical block 6, a first spring 7, a limiting groove 8, fastening bolts 9 and nuts 10, wherein two grooves are symmetrically formed in the circular ring 2, the first spring 7 is fixedly mounted in each groove, one end of the first spring 7 is fixedly mounted with the conical block 6, two limiting grooves 8 are symmetrically formed in the annular side surface of the cylindrical block 1, one end of the conical block 6 extends into each limiting groove 8, two fastening bolts 9 are symmetrically mounted on the annular side surface of the circular ring 2, one end of each fastening bolt 9 extends into each groove and is aligned with the corresponding conical block 6, the nut 10 is mounted on the annular side surface of each fastening bolt 9, the outer side of each nut 10 is fixedly mounted in the circular ring 2, a user pushes the circular ring 2 horizontally on the annular side surface of the cylindrical block 1, the circular ring 2 moves to drive the conical block 6 to move, and then the cylindrical block 1 extrudes the conical block 6, the conical block 6 is moved to extrude the first spring 7, the conical block 6 is aligned with the limiting groove 8 by adjusting the position of the circular ring 2, one end of the conical block 6 enters the limiting groove 8 under the action of the elastic force of the first spring 7, then the fastening bolt 9 is screwed, the fastening bolt 9 moves along the nut 10, the fastening bolt 9 moves to be attached to the conical block 6, and then the conical block 6 is driven to move to completely enter the limiting groove 8, so that the circular ring 2 is installed;
the auxiliary clamping mechanism comprises a rotating pin 11, a gear 12, an arc-shaped rack 13 and a second spring 14, the rotating pin 11 is fixedly mounted at the rear end of the rotating rod 5, a circular groove is formed in the front end of the cylindrical block 1, the rotating pin 11 is mounted inside the circular groove, the gear 12 is fixedly mounted on the annular side surface of the rotating pin 11, the two second springs 14 are symmetrically and fixedly mounted inside the circular groove, the arc-shaped rack 13 is fixedly mounted at one end of the second spring 14, one end of the arc-shaped rack 13 is meshed with the gear 12, a user rotates the rotating rod 5, the rotating rod 5 rotates to drive the rotating pin 11 to rotate, the rotating pin 11 rotates to drive the gear 12 to rotate, the gear 12 rotates to extrude the arc-shaped rack 13, the arc-shaped rack 13 moves to extrude the second spring 14, when the gear 12 is meshed with the arc-shaped rack 13 again and aligned, under the action of the elastic force of the second spring 14, the arc-shaped rack 13 moves to be meshed with the gear 12 again, so that the rotating rod 5 is fixed, the number of teeth on the gear 12 is 360, the gear 12 extrudes the arc-shaped rack 13 once, and the rotating rod 5 rotates by 1 degree, so that regular polygons with different edge numbers can be drawn conveniently;
the connecting mechanism comprises square blocks 18, T-shaped blocks 19, three springs 20, clamping blocks 21 and clamping grooves 22, the two square blocks 18 are symmetrically and fixedly installed inside the indexing ring 4, the T-shaped block 19 is installed at the front end of the square block 18, the three springs 20 are installed on the annular side face of the T-shaped block 19, two ends of each spring 20 are respectively attached to the T-shaped block 19 and the square block 18, the rear end of the T-shaped block 19 penetrates through the square block 18 and is fixedly provided with the clamping block 21, the clamping groove 22 is formed inside the circular ring 2, the clamping block 21 is installed inside the clamping groove 22, the indexing ring 4 is installed inside the annular groove, the square blocks 18 are installed inside the square groove, the clamping block 21 is installed inside the square groove of the clamping groove 22, the T-shaped blocks 19 are pushed, the T-shaped blocks 19 move to drive the clamping blocks 21 to move into the cylindrical groove, the T-shaped blocks 19 move to extrude the three springs 20, and then the T-shaped block 19 rotates, the T-shaped block 19 rotates to drive the fixture block 21 to rotate and be attached to the inner wall of the cylindrical groove, the fixture block 21 is horizontally pulled and held by the T-shaped block 19 under the action of the elastic force of the spring III 20, the fixture block 21 is clamped in the clamping groove 22, and the indexing ring 4 is installed.
The two groups of mounting mechanisms are arranged, the two groups of mounting mechanisms have the same structure, and are symmetrically mounted in the circular ring 2; the annular side surface of the rotating pin 11 is fixedly provided with a miniature bearing 15, and the outer side of the miniature bearing 15 is fixedly arranged in the circular groove; a through groove 16 is formed in the middle of the front end of the rotating rod 5, a pointer 17 is fixedly installed in the through groove 16, the pointer 17 is aligned with the indexing ring 4 in the front-back direction, and a circular through hole is formed in the front end of the rotating rod 5; an annular groove is formed in the front end of the cylindrical block 1, a reference ring 4 is arranged in the annular groove, two square grooves are symmetrically formed in the annular groove, and a square block 18 is arranged in each square groove; the clamping groove 22 is provided with a square groove and a cylindrical groove, the front end of the cylindrical block 1 is provided with the square groove, the inside of the cylindrical block 1 is provided with the cylindrical groove, the front end of the cylindrical groove is communicated with the square groove, and the size of the cross section of the clamping block 21 is the same as that of the square groove; a round hole groove is formed in the front end of the square block 18, and one end of the T-shaped block 19 is installed inside the round hole groove; the square block 18 is fixedly arranged on the indexing ring 4 through a first screw, and the fixture block 21 is fixedly arranged on the T-shaped block 19 through a second screw; the two groups of connecting mechanisms are same in structure and are symmetrically arranged at the front end of the cylindrical block 1; the sucking disc 3 is fixedly arranged on the circular ring 2 through a first rivet, and the gear 12 is fixedly arranged on the annular side surface of the rotating pin 11 through a second rivet.
This application is when using, with ring 2 on 1 annular side of cylinder piece, the level promotes ring 2, ring 2 removes and drives conical block 6 and remove, and then cylinder piece 1 extrudees conical block 6, make conical block 6 remove and extrude spring 7, position through adjusting ring 2, make conical block 6 align with spacing groove 8, under the effect of spring 7 elasticity, 6 one end of conical block gets into inside spacing groove 8, twist fastening bolt 9 after that, fastening bolt 9 removes along nut 10, fastening bolt 9 removes and laminates with conical block 6, and then it gets into inside spacing groove 8 completely to drive conical block 6 to remove, accomplish the installation of ring 2.
Rotate dwang 5, dwang 5 rotates and drives 11 rotations of drive rotating pin, rotating pin 11 rotates and drives gear 12 and rotate, gear 12 rotates and extrudes arc rack 13, make arc rack 13 remove and extrude spring two 14, when gear 12 aligns with arc rack 13 meshing once more, under the effect of spring two 14 elasticity, arc rack 13 removes and gear 12 intermeshing once more, and then fix dwang 5, the number of teeth on the gear 12 is 360, consequently, gear 12 extrudees arc rack 13 once more, dwang 5 rotates 1, and then conveniently draws the regular polygon of different limits.
Install reference ring 4 inside the ring channel, make square 18 install inside the square groove, and then make fixture block 21 install the square inslot portion at draw-in groove 22, promote T type piece 19 after that, T type piece 19 removes and drives fixture block 21 and remove and get into the cylinder inslot portion, T type piece 19 removes and extrudes three 20 springs, rotate T type piece 19 after that, T type piece 19 rotates and drives fixture block 21 and rotate and laminate with cylinder inslot wall, under the effect of three 20 spring forces of spring, T type piece 19 carries out the level to fixture block 21 and draws and hold, and then with the fixture block 21 joint inside draw-in groove 22, accomplish reference ring 4's installation.
The application has the advantages that:
1. with the ring on cylinder piece annular side, the level promotes the ring, the ring removes and drives the removal of toper piece, and then the cylinder piece extrudees the toper piece, make the toper piece remove and extrude spring one, through the position of adjusting the ring, make toper piece align with the spacing groove, under the effect of spring elasticity, toper piece one end gets into the spacing inslot, screw fastening bolt after that, fastening bolt removes along the nut, fastening bolt removes and laminates with the toper piece, and then it removes and gets into the spacing inslot completely to drive the toper piece, accomplish the installation of ring, the problem of lacking installation mechanism has been solved, cause inconvenient installing the ring on the cylinder piece, and then inconvenient installing the problem on the blackboard through the sucking disc with the cylinder piece.
2. Rotate the dwang, the dwang rotates to drive and drives the rotation round pin and rotate, the rotation round pin rotates and drives the gear and rotate, gear revolve extrudees the arc rack, make the arc rack remove and extrude spring two, when the gear aligns with arc rack reengagement, under the effect of two elastic forces of spring, the arc rack removes and gear reengages, and then fix the dwang, the number of teeth on the gear is 360, therefore the gear once extrudees the arc rack, the dwang rotates 1, and then conveniently draw the regular polygon of different limits, the problem of lacking supplementary fixture has been solved, cause the position of inconvenient fixed dwang of rotating, and then inconvenient chalk of utilizing passes the round hole through-hole and draws the point, inconvenient draw regular polygon's drawback.
3. Install the reference ring inside the ring channel, make the square install inside the square groove, and then make the fixture block install inside the square groove of draw-in groove, promote T type piece after that, T type piece removes and drives the fixture block and remove and get into the cylinder inslot, T type piece removes and extrudees spring three, rotate T type piece after that, T type piece rotates and drives the fixture block and rotate and laminate with cylinder inslot wall, under the effect of three elasticity of spring, T type piece carries out the level to the fixture block and draws and hold, and then with the fixture block joint inside the draw-in groove, accomplish the installation of reference ring, the problem of lacking coupling mechanism has been solved, and then inconvenient carry out the drawback of dismouting maintenance to the reference ring.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (10)

1. The utility model provides a primary school's mathematics polygon learning tool which characterized in that: the clamping device comprises a cylindrical block (1), a circular ring (2), suckers (3), an indexing circular ring (4), a rotating rod (5), an installation mechanism, an auxiliary clamping mechanism and a connection mechanism, wherein the circular ring (2) is installed on the annular side surface of the cylindrical block (1), more than two suckers (3) are uniformly and fixedly installed at the rear end of the circular ring (2), the rotating rod (5) is rotatably installed at the middle position of the front end of the cylindrical block (1), one end of the rotating rod (5) extends to the outer sides of the cylindrical block (1) and the circular ring (2), and the indexing circular ring (4) is installed at the front end of the cylindrical block (1) in a clamping mode;
the mounting mechanism comprises a conical block (6), a first spring (7), a limiting groove (8), fastening bolts (9) and nuts (10), wherein two grooves are symmetrically formed in the circular ring (2), the first spring (7) is fixedly mounted in each groove, the conical block (6) is fixedly mounted at one end of the first spring (7), two limiting grooves (8) are symmetrically formed in the annular side surface of the cylindrical block (1), one end of the conical block (6) extends into each limiting groove (8), the two fastening bolts (9) are symmetrically mounted on the annular side surface of the circular ring (2), one ends of the fastening bolts (9) extend into the grooves and are aligned with the conical block (6), the nuts (10) are mounted on the annular side surface of the fastening bolts (9), and the outer sides of the nuts (10) are fixedly mounted in the circular ring (2);
the auxiliary clamping mechanism comprises a rotating pin (11), a gear (12), an arc-shaped rack (13) and a second spring (14), the rotating pin (11) is fixedly installed at the rear end of the rotating rod (5), a circular groove is formed in the front end of the cylindrical block (1), the rotating pin (11) is installed in the circular groove, the gear (12) is fixedly installed on the annular side surface of the rotating pin (11), the two second springs (14) are symmetrically and fixedly installed in the circular groove, the arc-shaped rack (13) is fixedly installed at one end of each second spring (14), and one end of each arc-shaped rack (13) is meshed with the gear (12);
coupling mechanism includes square (18), T type piece (19), three (20) of spring, fixture block (21) and draw-in groove (22), two square (18) of graduation ring (4) inside symmetry fixed mounting, T type piece (19) are installed to square (18) front end, install three (20) of spring on T type piece (19) the annular side, and three (20) both ends of spring laminate with T type piece (19) and square (18) respectively mutually, T type piece (19) rear end passes square (18) and fixed mounting has fixture block (21), draw-in groove (22) have been seted up to ring (2) inside, and fixture block (21) are installed inside draw-in groove (22).
2. An elementary school mathematical polygon learning tool according to claim 1, characterized in that: the installation mechanism is equipped with two sets ofly, two sets of installation mechanism structure is the same, and two sets of installation mechanism symmetry is installed inside ring (2).
3. An elementary school mathematical polygon learning tool according to claim 1, characterized in that: the annular side surface of the rotating pin (11) is fixedly provided with a miniature bearing (15), and the outer side of the miniature bearing (15) is fixedly arranged in the circular groove.
4. An elementary school mathematical polygon learning tool according to claim 1, characterized in that: through groove (16) have been seted up to dwang (5) front end intermediate position, and lead to groove (16) inside fixed mounting and have pointer (17), align around pointer (17) and reference ring (4), circular through-hole has been seted up to dwang (5) front end.
5. An elementary school mathematical polygon learning tool according to claim 1, characterized in that: the cylindrical block is characterized in that an annular groove is formed in the front end of the cylindrical block (1), a reference ring (4) is arranged in the annular groove, two square grooves are symmetrically formed in the annular groove, and square blocks (18) are arranged in the square grooves.
6. An elementary school mathematical polygon learning tool according to claim 1, characterized in that: the clamping groove (22) is provided with a square groove and a cylindrical groove, the front end of the cylindrical block (1) is provided with the square groove, the cylindrical groove is formed in the cylindrical block (1), the front end of the cylindrical groove is communicated with the square groove, and the size of the cross section of the clamping block (21) is the same as that of the cross section of the square groove.
7. An elementary school mathematical polygon learning tool according to claim 1, characterized in that: the front end of the square block (18) is provided with a round hole groove, and one end of the T-shaped block (19) is arranged in the round hole groove.
8. An elementary school mathematical polygon learning tool according to claim 1, characterized in that: the square block (18) is fixedly arranged on the indexing ring (4) through a first screw, and the fixture block (21) is fixedly arranged on the T-shaped block (19) through a second screw.
9. An elementary school mathematical polygon learning tool according to claim 1, characterized in that: the connecting mechanisms are arranged in two groups, the two groups of connecting mechanisms are identical in structure, and the two groups of connecting mechanisms are symmetrically arranged at the front end of the cylindrical block (1).
10. An elementary school mathematical polygon learning tool according to claim 1, characterized in that: the sucker (3) is fixedly arranged on the circular ring (2) through a first rivet, and the gear (12) is fixedly arranged on the annular side face of the rotating pin (11) through a second rivet.
CN202120396061.XU 2021-02-23 2021-02-23 Primary school mathematics polygon learning tool Expired - Fee Related CN214984481U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202120396061.XU CN214984481U (en) 2021-02-23 2021-02-23 Primary school mathematics polygon learning tool

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202120396061.XU CN214984481U (en) 2021-02-23 2021-02-23 Primary school mathematics polygon learning tool

Publications (1)

Publication Number Publication Date
CN214984481U true CN214984481U (en) 2021-12-03

Family

ID=79157872

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202120396061.XU Expired - Fee Related CN214984481U (en) 2021-02-23 2021-02-23 Primary school mathematics polygon learning tool

Country Status (1)

Country Link
CN (1) CN214984481U (en)

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