CN219339074U

CN219339074U - Teaching aid for drawing ellipse

Info

Publication number: CN219339074U
Application number: CN202223153219.4U
Authority: CN
Inventors: 吴春禹
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-11-28
Filing date: 2022-11-28
Publication date: 2023-07-14
Anticipated expiration: 2032-11-28

Abstract

The utility model discloses a teaching aid for drawing ellipses, which relates to the field of teaching aids and has the technical scheme that: including base plate, roller bearing, tie beam, track tracker, be equipped with mutually perpendicular's spout on the base plate, the roller bearing includes two one end slidable mounting in the spout, the other end and tie beam sliding connection's first roller bearing and second roller bearing, the track tracker is installed on the tie beam of keeping away from the second roller bearing. The utility model has simple structure and low cost, and is convenient to draw and accurate in graph in practical teaching application; drawing ellipses by taking the half-long axis length and the half-short axis length as measurement, and conforming to an ellipse equation, thereby facilitating students to understand the spirit of craftsmen.

Description

Teaching aid for drawing ellipse

Technical Field

The utility model belongs to the field of teaching aids, and particularly relates to a teaching aid for drawing ellipses.

Background

The existing tools for drawing ellipses are convenient for students to master and understand, and the tools for drawing ellipses for teachers are few, and are usually drawn by adopting a compass for teaching and other drawing teaching aids, or by adopting an ellipsograph or an ellipse template, and by using a string with a fixed length and a pen point. The teaching compasses are matched with other drawing teaching aids, namely, the drawing of ellipses is carried out on a blackboard, for example, the ellipses are usually drawn through a ruler with an ellipse shape, and the ruler with the ellipse shape can only draw ellipses of one size and cannot draw ellipses of different sizes, so that the drawing steps of the tool are complex, the difficulty is high, the drawing of the ellipses does not meet the standard, and the blackboard is damaged to a certain extent; an ellipsograph or an ellipsograph is adopted for drawing, but the ellipsograph disclosed in the prior art has the problems of complex structure, inconvenient use and the like, is inconvenient for drawing ellipsographs, is not easy for students to understand and is difficult to popularize; the drawing is carried out by adopting a fixed-length string connected with the pen point, namely, two ends of the fixed-length string are fixed on the drawing board, then the string is tensioned by the pen point and slowly moves on the drawing board for a circle, so that an ellipse is obtained.

In addition, most tools such as ellipsographs and elliptic templates are designed with focus as the center, and have a certain gap from an elliptic equation.

Accordingly, there is a need to provide an elliptical tool that solves the above-described problems by taking the half-long and half-short axial lengths as metrics according to the elliptical equation.

Disclosure of Invention

Aiming at the defects in the prior art, the utility model provides a teaching aid for drawing ellipses, and aims to solve the problems that the existing tool for drawing ellipses is designed by taking a focus as the center and has a certain gap from an ellipse equation, and the precision of ellipse is not enough due to the fact that a soft rope is used for drawing ellipses according to definition, so that the tool is too simple and crude, and the teaching aid is not beneficial to students to understand spirit of craftsmen.

The technical aim of the utility model is realized by the following technical scheme: the utility model provides an oval teaching aid of drawing, includes base plate, roller bearing, tie-beam, track tracker, be equipped with mutually perpendicular's spout on the base plate, the roller bearing includes two one end installs in the spout, the other end and tie-beam slidable connection's first roller bearing and second roller bearing, the track tracker is installed on the tie-beam that keeps away from the second roller bearing;

the connecting beam is internally provided with two identical sliding cavities, each sliding cavity comprises an upper sliding cavity and a lower sliding cavity which are symmetrically distributed, and the cross section of the connecting beam is made to be an I-shaped body through the sliding cavities;

the track tracker comprises a lower slider, an upper slider and a pen clamping device, wherein the upper slider is arranged on the outer wall of a sliding cavity of the connecting beam, the lower slider is arranged in the sliding cavity of the connecting beam, the lower slider is provided with two threaded holes, the upper slider is provided with two threaded holes and a pen clamping device mounting hole, the pen clamping device is arranged on the connecting beam in an adjustable mode through bolts, and the pen clamping device is detachably arranged on the upper slider.

Further, the connecting beam is a straight beam, the sliding grooves comprise a first sliding groove and a second sliding groove, and the first sliding groove and the second sliding groove are straight grooves;

the whole shape of the roller is an I-shaped cylinder, the upper end and the lower end of the roller are provided with bulges, the bulges at the upper end are threaded bulges for installing an upper adjusting block, the bulges at the lower end are cylindrical bulges provided with bolt holes and are used for installing bearings, two threads and two nuts with opposite rotation directions are further arranged on the roller between the upper adjusting block and the bearings, and the upper adjusting block is further provided with threaded holes matched with the threaded bulges;

the vertical height of the roller is larger than the thickness of the substrate, and the transverse width of the middle part of the roller is smaller than the distance between the sliding grooves, so that the roller can slide in the sliding grooves;

the upper adjusting block is matched with the sliding cavity in size, and the bearing is matched with the sliding groove in size.

Further, the length of the connecting beam is smaller than that of the sliding groove, and the distance between the track tracker on the connecting beam and the first rolling shaft and the second rolling shaft is respectively the length b of the semi-short axis and the length a of the semi-long axis of the ellipse.

Furthermore, the upper sliding block is in a right-angle shape, two threaded holes and a pen clamping device mounting hole are respectively distributed on two surfaces of the upper sliding block, and the positions and the sizes of the two threaded holes are the same as those of the two threaded holes of the lower sliding block;

the pen clamping device comprises a clamping block and a bolt, wherein the clamping block is a round body with the shape identical to that of the chalk, and the bolt is vertically arranged on the end face of the clamping block and can be adjustably installed with the pen clamping device installation hole.

The utility model has the beneficial effects that: the utility model has simple structure and low cost, and is convenient to draw and accurate in graph in practical teaching application; drawing ellipses by taking the half-long axis length and the half-short axis length as measurement, and conforming to an ellipse equation, thereby facilitating students to understand the spirit of craftsmen.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a teaching aid for drawing ellipses according to an embodiment of the present utility model;

fig. 2 is a schematic structural diagram of a substrate for providing a teaching aid for drawing ellipses according to an embodiment of the present utility model;

FIG. 3 is a schematic diagram of the structure of the teaching aid A for drawing ellipses according to the embodiment of the utility model;

FIG. 4 is a schematic view of a roller for providing a teaching aid for drawing ellipses according to an embodiment of the present utility model;

fig. 5 is a schematic diagram of a structure of a roller B of a teaching aid for drawing ellipses according to an embodiment of the present utility model.

In the figure, 1, a substrate, 2, a connecting beam, 3, a track tracker, 4, a first roller, 5, a second roller, 6, an upper adjusting block, 7, a bearing, 11, a first chute, 12, a second chute, 21, a sliding cavity, 31, a lower slider, 32, an upper slider, 33 and a pen clamping device.

Detailed Description

The utility model is described below with reference to specific examples. It will be appreciated by those skilled in the art that these examples are for illustration of the utility model only and are not intended to limit the scope of the utility model in any way.

It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

As shown in fig. 1 to 5, the embodiment of the utility model provides a teaching aid for drawing ellipses, which comprises a base plate 1, rollers, a connecting beam 2 and a track tracker 3, wherein the base plate 1 is provided with mutually perpendicular sliding grooves, the rollers comprise a first roller 4 and a second roller 5, one end of each first roller is arranged in each sliding groove, the other end of each second roller is slidably connected with the connecting beam, and the track tracker 3 is arranged on the connecting beam 2 far away from the second roller 5;

the connecting beam 2 is internally provided with two identical sliding cavities 21, each sliding cavity comprises an upper sliding cavity and a lower sliding cavity which are symmetrically distributed, and the cross section of the connecting beam 2 is made to be an I-shaped body through the sliding cavities 21;

the track tracker 3 comprises a lower sliding block 31, an upper sliding block 32 and a pen clamping device 33, wherein the upper sliding block 31 is arranged on the outer wall of a sliding cavity 21 of the connecting beam 2, the lower sliding block 31 is arranged in the sliding cavity 21 of the connecting beam 2, the lower sliding block 31 is provided with two threaded holes, the upper sliding block 32 is provided with two threaded holes and a pen clamping device mounting hole, and the upper sliding block 32 is adjustably arranged on the connecting beam 2 through a bolt, and the positions of the first rolling shaft 4 and the second rolling shaft 5 on a sliding groove are fixed by tightening the bolt, so that the clamping limit is achieved; the pen clamping device 33 is detachably mounted on the upper sliding block 32.

In this embodiment, the connecting beam 2 is a straight beam, the sliding grooves include a first sliding groove 11 and a second sliding groove 12, and the first sliding groove 11 and the second sliding groove 12 are straight grooves;

the whole shape of the roller is an I-shaped cylinder, the upper end and the lower end of the roller are provided with bulges, the bulges at the two ends are respectively and detachably connected with an upper adjusting block 6 and a bearing 7, two threads and two nuts with opposite screwing directions are further arranged on the roller between the upper adjusting block 6 and the bearing 7, and the positions of the roller on a chute are adjusted and locked through the threads and the nuts; the upper protrusions are threaded protrusions and are arranged on the upper adjusting block 6 in a knob mode, bolt holes are formed in the protrusions below the protrusions, the bearings 7 are prevented from falling off through installation bolts, and threaded holes matched with the threaded protrusions are formed in the upper adjusting block;

the vertical height of the roller is larger than the thickness of the substrate 1, and the transverse width of the middle part of the roller is smaller than the distance between the sliding grooves, so that the roller can slide in the sliding grooves;

the upper adjusting block 6 is matched with the sliding cavity 21 in size, and the bearing 7 is matched with the sliding groove in size.

In this embodiment, the length of the connection beam 2 is smaller than the length of the chute, and the lengths of the distances from the track tracker 3 on the connection beam 2 to the first roller 4 and the second roller 5 are respectively the half-short axis length b and the half-long axis length a of the ellipse; when the second roller 5 slides on the second chute 12 and the first roller 4 slides on the first chute 11 away from the second chute 12, the track tracker 3 forms an oval track.

In this embodiment, the upper slider 32 is in a right angle shape, and two threaded holes and one mounting hole of the pen clamping device are respectively distributed on two surfaces of the upper slider 32, and the positions and the sizes of the two threaded holes are the same as those of the two threaded holes of the lower slider 31;

the pencil clamping device 33 comprises a clamping block and a bolt, wherein the clamping block is a round body with the shape identical to that of the chalk, the bolt is vertically arranged on the end face of the clamping block and is detachably arranged with the pencil clamping device mounting hole, and the clamping block clamps the chalk by adjusting the bolt. Wherein, the clamp splice is adjustable locking circle.

The working principle of the utility model is as follows: in use, the second roller 5 is on the second chute 12, the first roller 4 slides on the first chute 11 in a direction away from the second chute 12, and then the moving track of the track tracker 3 forms an ellipse, so as to draw the ellipse.

The above description is only a preferred embodiment of the present utility model, and the protection scope of the present utility model is not limited to the above examples, and all technical solutions belonging to the concept of the present utility model belong to the protection scope of the present utility model. It should be noted that modifications and adaptations to the present utility model may occur to one skilled in the art without departing from the principles of the present utility model and are intended to be within the scope of the present utility model.

Claims

1. An oval teaching aid of drawing, its characterized in that: the device comprises a substrate, rollers, a connecting beam and a track tracker, wherein the substrate is provided with a chute which is perpendicular to each other, the rollers comprise a first roller and a second roller, one end of each first roller is arranged in the chute, the other end of each second roller is slidably connected with the connecting beam, and the track tracker is arranged on the connecting beam far away from the second roller;

2. A teaching aid for drawing ellipses according to claim 1, wherein: the connecting beam is a straight beam, the sliding grooves comprise a first sliding groove and a second sliding groove, and the first sliding groove and the second sliding groove are straight grooves;

3. A teaching aid for drawing ellipses according to claim 1, wherein: the length of the connecting beam is smaller than that of the chute, and the distance between the track tracker on the connecting beam and the first rolling shaft and the second rolling shaft is respectively the length b of the semi-short axis and the length a of the semi-long axis of the ellipse.

4. A teaching aid for drawing ellipses according to claim 1, wherein: the upper sliding block is in a right-angle shape, two threaded holes and a pen clamping device mounting hole are respectively distributed on two surfaces of the upper sliding block, and the positions and the sizes of the two threaded holes are the same as those of the two threaded holes of the lower sliding block;