CN219339074U - Teaching aid for drawing ellipse - Google Patents

Abstract

The utility model discloses a teaching aid for drawing an ellipse, which relates to the field of teaching aids. The main points of the technical scheme are: comprising a base plate, a roller shaft, a connecting beam, and a track tracker. The base plate is provided with mutually perpendicular chutes. The rollers include two first rollers and second rollers, one end of which is slidably installed in the chute and the other end is slidably connected to the connecting beam, and the track tracker is installed on the connecting beam away from the second roller. The utility model has the advantages of simple structure, low cost, convenient drawing and accurate graphics in practical teaching applications; drawing an ellipse measured by the length of the semi-major axis and the length of the semi-minor axis, which is consistent with the ellipse equation, which is convenient for students to understand the "lean" of the craftsman spirit. "Essence.

Description

A Teaching Aid for Drawing an Ellipse

technical field

The utility model belongs to the field of teaching aids, in particular to a teaching aid for drawing ellipses.

Background technique

Among the existing tools for drawing ellipses, it is easy for students to master and understand, and there are few tools for drawing ellipses for teachers to use. Usually, the teaching compasses are used to draw with other drawing teaching aids, and ellipse gauges or ellipse templates are also used to draw. And use a fixed-length string with a pen tip to draw, etc. Use compass for teaching with other drawing teaching aids, that is, demonstrate on the blackboard, draw ellipse, for example, usually draw with a ruler with an ellipse shape, and a ruler with an ellipse shape can only draw one size Ellipses cannot draw ellipses of different sizes, so this kind of tool is not only complicated and difficult to draw, and the drawing of ellipses does not meet the standards, but also damages the blackboard to a certain extent; use ellipse gauges or ellipse templates to draw, but the existing public The ellipse gauge has problems such as complex structure and inconvenient use. Drawing an ellipse is very inconvenient, difficult for students to understand, and difficult to be popularized; use a fixed-length string to draw with a pen tip, that is, use a fixed-length string to draw it Fix both ends of the rope on the drawing board, then use the tip of the pen to tighten the rope, and slowly move it around the drawing board to obtain an ellipse. This method is not only not accurate enough, but also too simple to draw an ellipse quickly, and it is not easy to draw an ellipse. It is beneficial for students to understand the "lean" essence of craftsman spirit.

In addition, most of these tools such as ellipse gauges or ellipse templates are designed with the focus as the center, which is somewhat different from the ellipse equation.

Therefore, it is necessary to provide a tool for drawing an ellipse measured by the length of the semi-major axis and the length of the semi-minor axis according to the ellipse equation to solve the above problems.

Utility model content

Aiming at the deficiencies in the prior art, the utility model provides teaching aids for drawing ellipses, aiming at solving the problem that the focus-centered design of existing tools for drawing ellipses has a certain gap with the ellipse equation, and the use of soft ropes according to the definition Drawing an ellipse and the precision of the ellipse is not enough, it is too crude, which is not conducive to students' understanding of the "lean" essence of the craftsman spirit.

The above-mentioned technical purpose of the utility model is achieved through the following technical solutions: a teaching aid for drawing an ellipse, including a base plate, a roller, a connecting beam, and a track tracker, and the base plate is provided with mutually perpendicular chutes, and the The rollers include two first rollers and second rollers, one end of which is installed in the chute and the other end is slidably connected to the connecting beam, and the track tracker is installed on the connecting beam away from the second roller;

The inside of the connecting beam is provided with two identical sliding chambers, the sliding chambers include symmetrically distributed upper sliding chambers and lower sliding chambers, and the cross section of the connecting beam is shaped like an I shape through the sliding chambers;

The trajectory tracker includes a lower slider, an upper slider, and a pen holder. The upper slider is installed on the outer wall of the sliding cavity of the connecting beam, and the lower slider is installed in the sliding cavity of the connecting beam. The block is provided with two threaded holes, and the upper slider is provided with two threaded holes and a mounting hole for a pen-holding device, and can be adjusted and installed on the connecting beam through bolts, and the pen-holding device is detachably installed on the upper sliding block.

Further, the connecting beam is a straight beam, the chute includes a first chute and a second chute, and both the first chute and the second chute are straight grooves;

The overall shape of the roller is an I-shaped cylinder, with protrusions at the upper and lower ends. Cylindrical protrusions are used to install bearings. The upper adjustment block and the roller between the bearings are also provided with two threads and two nuts with opposite rotation directions. The upper adjustment block is also provided with a matching threaded holes;

The vertical height of the roller is greater than the thickness of the substrate, and the lateral width of the middle part of the roller is smaller than the distance between the chute, thereby ensuring that the roller can slide in the chute;

The size of the upper adjusting block matches the size of the sliding cavity, and the size of the bearing matches the size of the chute.

Further, the length of the connecting beam is less than the length of the chute, and the distances from the track tracker on the connecting beam to the first roller and the second roller are respectively the semi-minor axis length b and the semi-major axis of the ellipse long a.

Further, the upper slider is in the shape of a right angle, and two threaded holes and a mounting hole for the pen clamping device are respectively distributed on the two surfaces of the upper slider, and the positions of the two threaded holes and the two threaded holes of the lower slider are respectively distributed. same size as

The pen clamping device includes a clamping block and a bolt. The shape of the clamping block is a circular body matching the shape of the chalk. The bolt is vertically arranged on the end surface of the clamping block and can be adjusted and installed with the mounting hole of the pen clamping device.

Beneficial effects of the utility model: the utility model is simple in structure and low in cost. In practical teaching applications, it is convenient to draw and the graphics are accurate; the drawing ellipse is measured by the length of the semi-major axis and the length of the semi-minor axis, which is consistent with the ellipse equation and is convenient. Students understand the "lean" essence of craftsmanship.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are only some embodiments of the utility model, and those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 provides the structural representation of the teaching aid of painting ellipse for the utility model embodiment;

Fig. 2 provides the structural representation of the substrate of the teaching aid of drawing ellipse for the utility model embodiment;

Fig. 3 provides the structural representation of the A place of the teaching aid of drawing ellipse for the utility model embodiment;

Fig. 4 provides the structural representation of the roller of the teaching aid of drawing ellipse for the utility model embodiment;

Fig. 5 is a schematic diagram of the structure at B of the roller of the teaching aid for drawing an ellipse according to the embodiment of the present invention.

In the figure, 1. base plate, 2. connecting beam, 3. trajectory tracker, 4. first roller, 5. second roller, 6. upper adjustment block, 7. bearing, 11. first chute, 12 , the second chute, 21, the sliding chamber, 31, the lower slider, 32, the upper slider, 33, the pen holder.

Detailed ways

The utility model is described below with reference to specific embodiments. Those skilled in the art can understand that these examples are only used to illustrate the utility model, and they do not limit the scope of the utility model in any way.

It should be noted that when an element is referred to as being “fixed” to another element, it can be directly on the other element or there can also be an intervening element. 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 otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field of this invention. The terminology used in the description of the utility model herein is only for the purpose of describing specific embodiments, and is not intended to limit the utility model. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

As shown in Figures 1 to 5, a teaching aid for drawing an ellipse is provided in the embodiment of the utility model, including a base plate 1, a roller, a connecting beam 2, and a track tracker 3, and the base plate 1 is provided with mutually perpendicular The chute, the rollers include two first rollers 4 and second rollers 5, one end of which is installed in the chute and the other end is slidably connected to the connecting beam, and the track tracker 3 is installed far away from the second roller On the connecting beam 2 of the axis 5;

The inside of the connecting beam 2 is provided with two identical sliding chambers 21, the sliding chambers include an upper sliding chamber and a lower sliding chamber which are symmetrically distributed, and the cross section of the connecting beam 2 is shaped like an I-shaped body through the sliding chambers 21;

The trajectory tracker 3 includes a lower slider 31, an upper slider 32, and a pen holder 33. The upper slider 31 is installed on the outer wall of the sliding cavity 21 of the connecting beam 2, and the lower slider 31 is installed on the connecting beam. In the sliding cavity 21 of 2, the lower slider 31 is provided with two threaded holes, and the upper slider 32 is provided with two threaded holes and a pen holder installation hole, and can be adjusted and installed on the connecting beam 2 by bolts. Tighten the bolts to fix the positions of the first roller 4 and the second roller 5 on the chute, so as to reach the clamping limit; the pen clamping device 33 is detachably installed on the upper slider 32 .

In this embodiment, the connecting beam 2 is a straight beam, and the chute includes a first chute 11 and a second chute 12, and both the first chute 11 and the second chute 12 are straight grooves;

The overall shape of the roller is an I-shaped cylinder, and both ends are provided with protrusions, and the protrusions at both ends are respectively detachably connected with an upper adjustment block 6, a bearing 7, and the upper adjustment block 6, the bearing The rollers between 7 are also provided with two threads and two nuts in the opposite direction of rotation, and the position of the locking roller on the chute is adjusted through the threads and nuts; wherein, the upper protrusion is the thread protrusion and the upper The adjusting block 6 is installed with a knob, and the protrusion below is provided with a pin hole, and the bearing 7 is prevented from falling off by installing the pin, and the upper adjusting block is provided with a threaded hole matched with the threaded protrusion;

The vertical height of the roller is greater than the thickness of the substrate 1, and the lateral width of the middle part of the roller is smaller than the distance between the chute, thereby ensuring that the roller can slide in the chute;

The size of the upper adjusting block 6 matches the size of the sliding cavity 21, and the size of the bearing 7 matches the size of the chute.

In this embodiment, the length of the connecting beam 2 is less than the length of the chute, and the distances from the track tracker 3 on the connecting beam 2 to the first roller 4 and the second roller 5 are half the length of an ellipse. Axis length b, semi-major axis length a; wherein, when the second roller 5 is on the second chute 12 and the first roller 4 slides on the first chute 11 and away from the direction of the second chute 12, The trajectory tracker 3 will form a trajectory in the shape of an ellipse.

In the present embodiment, the upper slider 32 is in the shape of a right angle, and two threaded holes and a pen holder installation hole are respectively distributed on the two surfaces of the upper slider 32, and the two threaded holes are connected with the lower slider 31. The positions and sizes of the two threaded holes are the same;

Described pen clamping device 33 comprises clamping block, bolt, and the shape of described clamping block matches the circular body of chalk shape, and bolt is vertically arranged on the end face of clamping block, and is detachably installed with pen clamping device mounting hole, by Adjust this bolt to make the clamp block clamp the chalk. Wherein, the clamping block is an adjustable locking circle.

The working principle of the utility model: when in use, the second roller 5 is on the second chute 12, the first roller 4 slides on the first chute 11 and away from the direction of the second chute 12, and then the track tracker 3's moving track will form an ellipse, thus draw the ellipse.

The above descriptions are only preferred implementations of the present utility model, and the protection scope of the present utility model is not limited to the above-mentioned embodiments, and all technical solutions under the idea of the present utility model all belong to the protection scope of the present utility model. It should be pointed out that for those skilled in the art, some improvements and modifications without departing from the principle of the utility model should also be regarded as the protection scope of the utility model.

Claims (4)

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;

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.

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;

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.

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;

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.

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