CN214951002U

CN214951002U - Circumference measuring device for primary school mathematics

Info

Publication number: CN214951002U
Application number: CN202120172614.3U
Authority: CN
Inventors: 姜海燕
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-01-22
Filing date: 2021-01-22
Publication date: 2021-11-30
Anticipated expiration: 2031-01-22

Abstract

The application discloses circumference measuring device is used to primary school's mathematics, including fixed table platform, fixed plate, push pedal structure, limit structure and mark the structure, the one end of fixedly connected with support frame is located to the lower surface of fixed table platform, the other end department fixed mounting of support frame has the universal wheel, install the push pedal structure on the fixed table platform, the push pedal structure includes slider, support slide, fixed plate, threaded rod, turning handle, lifting slide and fixed slide. This device is rational in infrastructure, and convenient to use, this device can be measured circular model's circumference, and measuring effect is better, and the teaching of being convenient for is used, is favorable to the student to understand, and is interesting better, improves student's interest in study, and this device has limit structure, can effectually carry out spacing measurement with circular mould through limit structure for difficult skew during the measurement, and then improved the measuring precision, feasible survey more accurate.

Description

Circumference measuring device for primary school mathematics

Technical Field

The application relates to a circumference measuring device, in particular to a circumference measuring device for primary mathematics.

Background

The mathematics learning is a series of knowledge of teaching materials, teaching children's knowledge about numbers, four arithmetic operations, graphic and length calculation formulas and unit conversion, and lays a good mathematical foundation for junior high school and daily life calculation. The Netherlands educator Friedenmol believes that: "mathematics is derived from reality, must also be rooted in reality, and is applied to reality. "indeed, modern mathematics requires us to observe the world with the eye of mathematics, and to elucidate the world with mathematical language. From the psychological point of mathematics learning of students, the learning process of students is not a passive absorption process, but a reconstruction process based on the existing knowledge and experience, so that the students can learn more actively by doing middle school and playing middle school and converting abstract mathematical relations into familiar cases in the lives of the students.

When the circle of primary school's teaching carries out the circumference teaching at present, need measure the circumference of circle, traditional measuring method adopts the tape measure to encircle the measurement more, but this kind of measuring method's teaching effect is not good enough, and is less with student's interaction, is difficult for arousing student's interest in learning. Therefore, a circumference measuring device for primary mathematics is provided to solve the above problems.

Disclosure of Invention

A circumference measuring device for primary mathematics comprises a fixed table, a fixed plate, a push plate structure, a limiting structure and a marking structure;

the lower surface of the fixed table is fixedly connected with one end of a support frame, the other end of the support frame is fixedly provided with a universal wheel, the fixed table is provided with a push plate structure, the push plate structure comprises a sliding block, a supporting sliding plate, a fixed plate, a threaded rod, a rotating handle, a lifting sliding block and a fixed sliding plate, inner cavities are respectively arranged at two sides of the interior of the fixed table, the inner cavities at two sides of the fixed table are respectively connected with the sliding block in a sliding way, the upper surface of the sliding block is fixedly connected with one end of the supporting sliding plate, the other end of the supporting sliding plate penetrates through the upper wall of the inner cavity of the fixed table and extends out of the wall, the supporting sliding plate is in sliding fit with the upper wall of the inner cavity of the fixed table, the fixed plate is fixedly connected between the top ends of the two supporting sliding plates, the inner cavity is arranged in the fixed plate, and the threaded rod is rotatably connected between the upper wall and the lower wall of the inner cavity of the fixed plate, the inner cavity of the fixed plate is connected with a lifting slide block in a sliding manner, one end of a fixed slide plate is fixedly connected to the side wall of the lifting slide block, the other end of the fixed slide plate penetrates through the side wall of the inner cavity of the fixed plate and extends out of the inner cavity, and the fixed slide plate is in sliding fit with the side wall of the inner cavity of the fixed plate;

the marking structure is fixedly connected at one end of the fixed sliding plate and comprises a limiting plate, side ear plates, a first loop bar, a first spring, a first connecting rod, balls, a second loop bar, a second spring, a second connecting rod and chalk, a limiting plate is fixedly connected at one end of the fixed sliding plate, the side ear plates are fixedly connected at the lower surfaces of the two sides of the limiting plate, the first loop bar is fixedly connected at the side wall of one of the side ear plates, the first connecting rod is connected in the inner cavity of the first loop bar in a sliding manner, one end of the first connecting rod is fixedly connected with one end of the first spring, the other end of the first spring extends to the inner cavity side wall of the first loop bar, the balls are rotatably arranged at the other end of the first connecting rod in an embedded manner, the second loop bar is fixedly connected at the side wall of the other side ear plate, and a second connecting rod is connected in the inner cavity of the second loop bar in a sliding manner, one end of the second connecting rod is fixedly connected with one end of a second spring, the other end of the second spring extends to the position of the inner cavity side wall of the second loop bar and is fixedly connected with the inner cavity side wall of the second loop bar, a slot is formed in the other end of the second connecting rod, and chalk is inserted in the slot of the second connecting rod in a sliding mode.

Further, the equal fixedly connected with support frame in lower surface four corners department of fixed table platform, four the equal fixed mounting in bottom department of support frame has the universal wheel.

Further, the threaded rod runs through the lifting slide block and is in threaded fit with the lifting slide block.

Furthermore, a slide way is arranged at the middle position of the fixed table platform, and a limiting structure is arranged at the slide way of the fixed table platform.

Furthermore, the limiting structure comprises a sliding plate, a limiting spring and a second ball, a sliding groove is formed in the sliding way of the fixed table, the sliding plate is connected in the sliding groove of the fixed table in a sliding mode, one end of the sliding plate is fixedly connected with one end of the limiting spring, the other end of the limiting spring is fixedly connected to the side wall of the sliding groove of the fixed table, a limiting pressing plate is fixedly connected to the other end of the sliding plate, and the second ball is embedded and rotated in the side wall of the limiting pressing plate.

Furthermore, the second ball is a plurality of in total, and a plurality of the equal equidistance of second ball arranges the setting in the lateral wall department of spacing clamp plate.

Further, the upper surface department fixedly connected with scale plate of fixed table platform, the scale mark that a plurality of equidistance were arranged has been seted up on the surface of scale plate.

Furthermore, a pointer is fixedly connected to the side edge of the fixing plate, and one end of the pointer points to the scale of the scale plate.

Furthermore, a limiting bolt is connected to the arc-shaped wall of the second sleeve rod in a threaded mode, and one end of the limiting bolt abuts against the side wall of the chalk.

Furthermore, the top end of the threaded rod extends out of the upper wall of the fixing plate, and the top end of the threaded rod is fixedly connected with a rotating handle.

The beneficial effect of this application is: the application provides a circumference measuring device for primary school mathematics that has good interdynamic and learning interest is higher.

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 perspective view of an embodiment of the present application;

FIG. 2 is a schematic diagram of an internal structure of an embodiment of the present application;

FIG. 3 is a schematic side view of an embodiment of the present application;

FIG. 4 is an enlarged view of a portion of the structure of FIG. 3 according to an embodiment of the present disclosure;

FIG. 5 is an enlarged view of a portion of the structure shown at B in FIG. 3 according to an embodiment of the present disclosure;

fig. 6 is a schematic structural diagram of a second ball according to an embodiment of the present application.

In the figure: 1. fixed table, 2, support frame, 3, universal wheel, 4, slider, 5, support slide, 6, fixed plate, 7, threaded rod, 8, twist grip, 9, lifting slide, 10, fixed slide, 11, limiting plate, 12, side otic placode, 13, first loop bar, 14, first spring, 15, head rod, 16, ball, 17, second loop bar, 18, second spring, 19, second connecting rod, 20, chalk, 21, spacing bolt, 22, sliding plate, 23, spacing spring, 24, spacing clamp plate, 25, second ball, 26, pointer, 27, scale plate.

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 circumference measuring device for primary mathematics includes a fixed table 1, a fixed plate 6, a push plate structure, a limit structure and a marking structure;

the lower surface of the fixed table platform 1 is fixedly connected with one end of a support frame 2, the other end of the support frame 2 is fixedly provided with a universal wheel 3, the fixed table platform 1 is provided with a push plate structure, the push plate structure comprises a slide block 4, a support slide plate 5, a fixed plate 6, a threaded rod 7, a rotating handle 8, a lifting slide block 9 and a fixed slide plate 10, inner cavities are respectively arranged at two sides of the inner part of the fixed table platform 1, the slide block 4 is respectively and slidably connected in the inner cavities at two sides of the fixed table platform 1, one end of the support slide plate 5 is fixedly connected at the upper surface of the slide block 4, the other end of the support slide plate 5 penetrates through the upper wall of the inner cavity of the fixed table platform 1 and extends out of the inner wall, the support slide plate 5 is in sliding fit with the upper wall of the inner cavity of the fixed table platform 1, a fixed plate 6 is fixedly connected between the top ends of the two support slide plates 5, and the inner cavity is arranged in the fixed plate 6, a threaded rod 7 is rotatably connected between the upper wall and the lower wall of the inner cavity of the fixed plate 6, a lifting slide block 9 is slidably connected in the inner cavity of the fixed plate 6, one end of a fixed slide plate 10 is fixedly connected to the side wall of the lifting slide block 9, the other end of the fixed slide plate 10 penetrates through the side wall of the inner cavity of the fixed plate 6 and extends out of the inner cavity, and the fixed slide plate 10 is in sliding fit with the side wall of the inner cavity of the fixed plate 6;

the fixed sliding plate 10 is fixedly connected with a marking structure at one end, the marking structure comprises a limiting plate 11, a side lug plate 12, a first sleeve rod 13, a first spring 14, a first connecting rod 15, a ball 16, a second sleeve rod 17, a second spring 18, a second connecting rod 19 and a chalk 20, the fixed sliding plate 10 is fixedly connected with the limiting plate 11 at one end, the side lug plates 12 are fixedly connected with the lower surfaces of the two sides of the limiting plate 11, the first sleeve rod 13 is fixedly connected with the side wall of the side lug plate 12, the first connecting rod 15 is slidably connected with the inner cavity of the first sleeve rod 13, one end of the first spring 14 is fixedly connected with one end of the first connecting rod 15, the other end of the first spring 14 extends to the inner cavity side wall of the first sleeve rod 13, the ball 16 is rotatably arranged at the embedding position of the other end of the first connecting rod 15, the second sleeve rod 17 is fixedly connected with the side wall of the side lug plate 12, the chalk box is characterized in that a second connecting rod 19 is connected in the inner cavity of the second sleeve rod 17 in a sliding mode, one end of a second spring 18 is fixedly connected to one end of the second connecting rod 19, the other end of the second spring 18 extends to the position of the inner cavity side wall of the second sleeve rod 17 and is fixedly connected with the inner cavity side wall of the second sleeve rod 17, a slot is formed in the other end of the second connecting rod 19, and chalk 20 is inserted in the slot of the second connecting rod 19 in a sliding mode.

The four corners of the lower surface of the fixed table platform 1 are fixedly connected with support frames 2, and universal wheels 3 are fixedly mounted at the bottom ends of the four support frames 2; the threaded rod 7 penetrates through the lifting slide block 9 and is in threaded fit with the lifting slide block 9; a slide way is arranged at the middle position of the fixed table 1, and a limiting structure is arranged at the slide way of the fixed table 1; the limiting structure comprises a sliding plate 22, a limiting spring 23 and a second ball 25, a sliding groove is formed in the sliding way of the fixed table 1, the sliding plate 22 is connected in the sliding groove of the fixed table 1 in a sliding mode, one end of the sliding plate 22 is fixedly connected with one end of the limiting spring 23, the other end of the limiting spring 23 is fixedly connected to the side wall of the sliding groove of the fixed table 1, a limiting pressing plate 24 is fixedly connected to the other end of the sliding plate 22, and the second ball 25 is embedded and rotated in the side wall of the limiting pressing plate 24; the number of the second balls 25 is a plurality, and the second balls 25 are arranged on the side wall of the limiting pressure plate 24 at equal intervals; the upper surface of the fixed table 1 is fixedly connected with a scale plate 27, and the surface of the scale plate 27 is provided with a plurality of scale marks which are distributed at equal intervals; a pointer 26 is fixedly connected to the side edge of the fixed plate 6, and one end of the pointer 26 points to the scale of the scale plate 27; a limiting bolt 21 is connected to the arc-shaped wall of the second sleeve rod 17 in a threaded manner, and one end of the limiting bolt 21 abuts against the side wall of the chalk 20; the top end of the threaded rod 7 extends to the outside of the upper wall of the fixed plate 6, and the top end of the threaded rod 7 is fixedly connected with a rotating handle 8.

When the device is used, firstly, the universal wheels 3 are installed at the bottom of the device, the device can be moved conveniently through the universal wheels 3, the device is moved to a teaching place, a circular model to be measured is vertically placed in a slide way of the fixed table platform 1, the circular model is positioned between the two limiting pressure plates 24, the two limiting pressure plates 24 are driven by the elastic action of the limiting springs 23 to clamp two sides of the circular model, and further the limiting effect of movement is achieved, the fixed plate 6 is moved at the same time, one side edge of the fixed plate 6 is contacted with the arc-shaped wall of the circular model, the rotating handle 8 is driven by the rotating handle 8 to rotate the threaded rod 7, the lifting slide block 9 is driven by the rotation of the threaded rod 7 to move, the fixed slide plate 10 and the limiting plate 11 are driven by the downward movement of the lifting slide block 9 to move downwards, the limiting plate 11 is enabled to move downwards, the ball 16 and the chalk 20 are enabled to move to the side faces of the two sides of the circular model, the ball 16 and the chalk 20 are enabled to abut against the side faces of the two sides of the circular model respectively through the elastic action of the first spring 14 and the second spring 18, at the moment, a student can remember the number of scales of the pointer 26 pointing to the scale plate 27, then a teacher pushes the circular model to rotate forwards, the fixing plate 6 is driven to move forwards through the forward movement of the circular model, meanwhile, when the circular model rotates, the chalk 20 can draw a circle at the side wall of the circular model, when the chalk 20 draws a complete circle, the forward movement of the circular model can be stopped, the student can remember the number of scales of the pointer 26 pointing to the scale plate 27 again, and the number of scales of the previous time is subtracted from the number of scales of the next time, so that the number of the circumference of the circular model can be obtained.

The application has the advantages that:

1. the device has a reasonable structure, is convenient to use, can measure the circumference of the circular model, has a good measuring effect, is convenient to use for teaching, is beneficial to understanding of students, has good interest, and improves the learning interest of the students;

2. the device is provided with a limiting structure, and the circular mold can be effectively limited and measured through the limiting structure, so that the circular mold is not easy to deviate during measurement, the measurement accuracy is improved, and the measurement is more accurate;

3. this device can mark the circular model through marking the structure for can be comparatively accurate measure complete periphery, the further promotion of measuring effect.

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

1. The utility model provides a circumference measuring device is used to primary school's mathematics which characterized in that: comprises a fixed table (1), a fixed plate (6), a push plate structure, a limit structure and a marking structure;

the lower surface of the fixed table (1) is fixedly connected with one end of a support frame (2), the other end of the support frame (2) is fixedly provided with a universal wheel (3), the fixed table (1) is provided with a push plate structure, the push plate structure comprises a slide block (4), a support slide plate (5), a fixed plate (6), a threaded rod (7), a rotating handle (8), a lifting slide block (9) and a fixed slide plate (10), the two sides of the interior of the fixed table (1) are both provided with inner cavities, the inner cavities of the two sides of the fixed table (1) are both slidably connected with the slide block (4), the upper surface of the slide block (4) is fixedly connected with one end of the support slide plate (5), the other end of the support slide plate (5) penetrates through the upper wall of the inner cavity of the fixed table (1) and extends out of the inner wall, the support slide plate (5) is in sliding fit with the upper wall of the inner cavity of the fixed table (1), a fixing plate (6) is fixedly connected between the top ends of the two supporting sliding plates (5), an inner cavity is formed in the fixing plate (6), a threaded rod (7) is rotatably connected between the upper wall and the lower wall of the inner cavity of the fixing plate (6), a lifting sliding block (9) is slidably connected in the inner cavity of the fixing plate (6), one end of a fixing sliding plate (10) is fixedly connected to the side wall of the lifting sliding block (9), the other end of the fixing sliding plate (10) penetrates through the side wall of the inner cavity of the fixing plate (6) and extends out of the wall, and the fixing sliding plate (10) is in sliding fit with the side wall of the inner cavity of the fixing plate (6);

the fixed sliding plate comprises a fixed sliding plate (10), a side lug plate (12), a first loop bar (13), a first spring (14), a first connecting rod (15), balls (16), a second loop bar (17), a second spring (18), a second connecting rod (19) and chalk (20), wherein the fixed sliding plate (10) is fixedly connected with the limiting plate (11) at one end, the side lug plates (12) are fixedly connected with the lower surfaces of the two sides of the limiting plate (11), the first loop bar (13) is fixedly connected with the side wall of the side lug plate (12), the first connecting rod (15) is slidably connected in the inner cavity of the first loop bar (13), one end of the first connecting rod (15) is fixedly connected with one end of the first spring (14), and the other end of the first spring (14) extends to the inner cavity side wall of the first loop bar (13), the utility model provides a chalk box, including first connecting rod (15), lateral ear plate (12), lateral ear plate, first connecting rod (15), second connecting rod (17), sliding connection have second connecting rod (19) in the inner chamber of second connecting rod (17), the one end of fixedly connected with second spring (18) of one end department of second connecting rod (19), the other end of second spring (18) extend to the inner chamber lateral wall department of second connecting rod (17) and with fixed connection between the inner chamber lateral wall of second connecting rod (17), the slot has been seted up to the other end department of second connecting rod (19), it has chalk (20) to slide to peg graft in the slot of second connecting rod (19).

2. A circumference measuring device for primary school mathematics according to claim 1, wherein: the lower surface four corners department of fixed table platform (1) is equal fixedly connected with support frame (2), four the equal fixed mounting in bottom department of support frame (2) has universal wheel (3).

3. A circumference measuring device for primary school mathematics according to claim 1, wherein: the threaded rod (7) penetrates through the lifting slide block (9) and is in threaded fit with the lifting slide block (9).

4. A circumference measuring device for primary school mathematics according to claim 1, wherein: the middle position of the fixed table (1) is provided with a slide way, and the slide way of the fixed table (1) is provided with a limiting structure.

5. A circumference measuring device for primary school mathematics according to claim 1, wherein: the limiting structure comprises a sliding plate (22), a limiting spring (23) and second balls (25), a sliding groove is formed in the sliding way of the fixed table (1), the sliding plate (22) is connected in the sliding groove of the fixed table (1) in a sliding mode, one end of the sliding plate (22) is fixedly connected with one end of the limiting spring (23), the other end of the limiting spring (23) is fixedly connected to the side wall of the sliding groove of the fixed table (1), the other end of the sliding plate (22) is fixedly connected with a limiting pressing plate (24), and the second balls (25) are embedded and rotated in the side wall of the limiting pressing plate (24).

6. A circumference measuring device for primary school mathematics according to claim 5, wherein: the second ball bearings (25) are arranged on the side wall of the limiting pressing plate (24) at equal intervals.

7. A circumference measuring device for primary school mathematics according to claim 1, wherein: the upper surface department fixedly connected with scale plate (27) of fixed table platform (1), the scale mark that a plurality of equidistance were arranged is seted up on the surface of scale plate (27).

8. A circumference measuring device for primary school mathematics according to claim 1, wherein: the side edge of the fixing plate (6) is fixedly connected with a pointer (26), and one end of the pointer (26) points to the scale of the scale plate (27).

9. A circumference measuring device for primary school mathematics according to claim 1, wherein: the arc-shaped wall of the second loop bar (17) is in threaded connection with a limiting bolt (21), and one end of the limiting bolt (21) abuts against the side wall of the chalk (20).

10. A circumference measuring device for primary school mathematics according to claim 1, wherein: the top of threaded rod (7) extends to outside the upper wall of fixed plate (6), the top department fixedly connected with twist grip (8) of threaded rod (7).