CN212061588U

CN212061588U - Plane geometric positioning drawing and dynamic demonstration tool

Info

Publication number: CN212061588U
Application number: CN202020438980.4U
Authority: CN
Inventors: 秦钟文
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-03-31
Filing date: 2020-03-31
Publication date: 2020-12-01
Anticipated expiration: 2030-03-31

Abstract

A planar geometric positioning drawing and dynamic demonstration tool. The invention combines the functions of the ruler, the compasses and the protractor and can complete the drawing of plane figures and the dynamic demonstration of the change process. The device comprises two sliding guide rails with scales, a narrow upper part, a wide lower part and a concave middle part, two attached rulers with scales, a hollow fixed connector with a pointer and four sliding clamping seats. The length of the upper part of the guide rail is selected, the angle measuring function is increased, and the two guide rails can rotate to the same straight line. The slide clamp seat is divided into an upper part and a lower part. The two lower devices are a group and are clamped on a guide rail, the concave-convex condition inside the lower devices is matched with the guide rail so as to be convenient for linear sliding, and the lower devices are provided with angle measurement scales; the upper part is provided with a scale identification pointer for identifying the scale of the graduated scale; the two parts are connected through a bearing with inner rings provided with threads and a flange and a hollow screw to ensure that the orthographic projections of the required guide rail and the scale position of the attached ruler are superposed.

Description

Plane geometric positioning drawing and dynamic demonstration tool

Technical Field

The invention relates to a tool for plane geometric positioning drawing and dynamic demonstration. The invention utilizes the exquisite connection design, organically combines the functions of the ruler, the compasses and the protractor, and can complete the drawing of complex plane figures and the dynamic demonstration of the figure change process.

Background

At present, tools for drawing and dynamic demonstration of geometric figures on the market have single functions, but the contradiction of the requirements that a multifunctional tool for drawing and dynamic demonstration of geometric transformation is hoped to replace multiple tools in real life, particularly teachers, students and drawing personnel, cannot be solved. In the existing related patent retrieval, the patent with comprehensive functions mostly adopts the design idea that the rotation center is positioned in the middle of the ruler, so that the measurement of the lengths of the angle and the line segment can not be simultaneously met, and the practical application of related products is also restricted; there are several patented designs that attempt to overcome the above disadvantages, but the products are designed with rigid connections of the parts and are not easily and flexibly convertible between positioning and movement.

Disclosure of Invention

Take a math teacher as an example: teachers need to bring rulers, compasses, set squares, compasses and the like in mathematics class, but if drawings and demonstration are needed, particularly when the teachers comprehensively use various teaching equipment, the teachers may feel confused and disorderly, such as dynamic demonstration needed when juniors and teachers explain relevant knowledge of parallelograms. The invention has compact structure, divides four rulers into labor and connects the four rulers by a device which can slide and rotate controllably and measure angles to form a detachable quadrangle. The tool can control the translation length and the rotation angle, and can easily complete accurate mapping and dynamic demonstration tasks.

The technical scheme adopted by the invention for solving the technical problems is as follows: two of the four straight rulers are designed into a sliding guide rail with scales, narrow upper part, wide lower part and waist-shaped concave middle part, the other two straight rulers are designed into an auxiliary ruler with scales, and a hollow fixed connector with a pointer and four sliding clamping seats are designed; one end of each of the two guide rails is provided with a convex central rotating hole for installing a fixed connector, and the direction pointer of the second guide rail and the edges of the main scales of the two guide rails are on the same straight line; the waist-in part has periodically determined waveform concave-convex lines, the concave-convex conditions inside the devices below the four sliding clamping seats are matched with the guide rail, and the friction force can be adjusted through a specially-made threaded positioning clamp so as to slide on the guide rail in a fixed value; one end of a central rotating hole of the guide rail I is provided with a part of waist and upper part, the length is removed by taking one half of a semicircular angle measuring device as a standard so as to be convenient for carving angle measuring scale lines, the circle center of the angle measuring device is superposed with the center of the central rotating hole, and the other half of the angle measuring device is connected below the bottom of the guide rail; one end of a central rotating hole of the second guide rail is left at the lower part of the guide rail, and the left length can ensure that the two guide rails can rotate to the same straight line; the sliding clamping seat is provided with angle measurement scales; the upper part is provided with a scale identification pointer for identifying the scale of the graduated scale; the upper part and the lower part are connected through a bearing with threads and a flange on an inner ring and a hollow screw to ensure that the scales required by the upper part and the lower part are on the same point. Through the unique design of the connecting device, the invention can ensure that the center of the central rotating hole, the edge of the main graduated scale, the connecting hole of the sliding clamping seat, the center of the hollow connecting screw and the orthographic projection of the graduated pointer are all on the same straight line, so as to realize accurate positioning in drawing and demonstration; by means of a layered design, the tool is easy to deploy and stow.

Furthermore, one end of each of the two sliding guide rails is provided with a convex central rotating hole with scales, the upper part is narrow, the lower part is wide, the middle part is narrow and the middle part is concave, and the tail parts of the two guide rails are provided with compasses rotating and positioning and writing tools which can be connected with sleeves with proper sizes; the centers of the central rotating holes of the two guide rails are positioned on a straight line where one edge of the guide rail is positioned, and the central rotating hole of the second guide rail is provided with a positioning clamping groove to ensure that the relative positions of the fixed connector and the second guide rail are unchanged; a bearing is arranged in a central rotating hole of the first guide rail, and the thickness of the two central rotating holes respectively accounts for half of the thickness of the lower part of the guide rail and are staggered; scales for measuring the length are engraved on the two edges and the upper part of each guide rail, the minimum measurement unit of the scales can be determined according to the actual requirement, and the main scales on the edges of the central rotating holes of the two guide rails need to use the center of the central rotating hole as a scale of 0 so as to measure the angle and the side length at the same time; one end of a central rotating hole of the guide rail I is provided with the upper part and the waist part of the guide rail, so that the lower plane of the guide rail can be marked with the scale mark of a half protractor, and the other half part of the protractor is connected below the bottom of the unified guide rail, so that the two parts form a unified semicircular protractor which is not in the same plane, and the measuring center of the protractor is coincided with the center of the central rotating hole; the protractor is specially marked with scale marks of 15 degrees, 22.5 degrees, 30 degrees, 36 degrees, 45 degrees, 60 degrees, 72 degrees, 90 degrees, 108 degrees, 120 degrees and 150 degrees; one end of a central rotating hole of the second guide rail is provided with a lower part of the section, and the length is omitted so as to ensure that the two guide rails can rotate to the same straight line; the middle sunken waist-contracting parts of the two guide rails are provided with wave-shaped concave-convex lines with fixed periods, and the concave-convex periods are correspondingly matched with the minimum measurement unit of the main scale, so that the sliding clamping seat is convenient to position.

Furthermore, the fixed connector is hollow, and the end points of the existing lines can be observed; the size of the hollow fixed connector is matched with that of the central rotating hole; the bottom of the hollow fixed connector is provided with a flange, and a convex positioning point is matched with a positioning clamping groove of a central rotating hole of the guide rail II; a gap is arranged above the hollow fixed connector and is matched with the positioning salient point of the pointer in the two directions of the guide rail.

Furthermore, the middle of the pointer in the two directions of the guide rail is provided with a circular ring, the pointer is sharp, one surface of each pointer is linear, and the straight line passes through the circle center of the circular ring.

Furthermore, the middle of the two auxiliary rulers with scales is protruded for identification; the two auxiliary scales with scales are provided with scales on two sides by taking the convex middle position as 0 scale, so that the scale can be conveniently obtained by summing any length.

Furthermore, the sliding clamping seat is divided into an upper part and a lower part which are connected by a bearing and a hollow screw; the concave-convex condition of the hollow interior of the lower part of the sliding clamping seat is matched with the appearance of the guide rail, so that the clamping seat can freely slide on the guide rail in a linear direction; one side of the lower part of the sliding clamping seat is provided with a threaded hole with a convex inner part for installing a threaded positioning clamp; the lower part of the sliding clamping seat is provided with a connecting hole, and the center of the connecting hole is orthographically projected on the straight line where the edge of the main scale of the guide rail is located; the upper plane of the lower part of the sliding clamping seat is provided with angle measuring scale marks taking the connecting hole as a circle center, and particularly marked with scale marks of 15 degrees, 22.5 degrees, 30 degrees, 36 degrees, 45 degrees, 60 degrees, 72 degrees, 90 degrees, 108 degrees, 120 degrees and 150 degrees.

Furthermore, the thread positioning clip comprises three parts, including an outer circular convex movable cap, a spring and a hollow screw with a head, and the device transmits pressure to the movable cap through the elastic screw to loosen or compress the spring so as to adjust the friction force between the corrugated concave-convex lines on the movable cap and the guide rail and realize relative positioning.

Furthermore, a bearing is fixed in the connecting hole, and a thread and a flange are arranged on the inner ring of the connecting hole to ensure effective connection with a part of screws on the sliding clamping seat and reduce friction force; the nut is arranged on the screw on the upper part of the sliding clamping seat, so that the friction force generated when the auxiliary ruler rotates can be adjusted; the flange can also help to screw in the hollow screw at the upper half part of the sliding positioning clamping seat; the upper part of the sliding clamping seat is provided with a clamping part with a scale pointer, and the position of the edge of the scale can be restrained; the orthographic projection of the needle point of the scale pointer is positioned at the center of the connecting hole below the sliding clamping seat; the upper side of the upper part of the sliding clamping seat is provided with a threaded hole with a convex inner part for mounting a threaded positioning clamp; there is a scale value observation hole to observe the scale value.

The invention has the beneficial effects that: the invention can be used for easily drawing and demonstrating the plane geometric figures related to the compulsory education stage, such as: the number axis, the plane rectangular coordinate system, the parallel line, the intersecting line, the perpendicular bisector, the angular bisector, the triangle, the quadrangle, the circle and other special figures with special angles can be generated in more generations. If a ruler with proper size is inserted on the fixed connecting head, a three-dimensional coordinate system can be established.

If the invention is used for teaching demonstration of the compulsory education section, the length of the main scale of the suggested guide rail is not more than 55 cm and the total length of the auxiliary scale is not more than 30 cm based on the compulsory education section mathematics learning condition and referring to the common stock colluding number.

Drawings

The invention is further described below with reference to the accompanying drawings.

Fig. 1 is a schematic diagram of a finished product.

Fig. 2 is a schematic view of the second guide rail.

Fig. 3 is a schematic view of a guide rail.

Fig. 4 and 5 are a front view and a top view of the hollow fixed connector.

Fig. 6 is a schematic view of two direction indicators of the guide rail.

Fig. 7 is a schematic view of a graduated scale.

Fig. 8, 9 and 10 are three views of the lower part of the slide clamp.

FIG. 11 is a schematic view of an inner ring flanged bearing.

Fig. 12 is a schematic view of a threaded retaining clip.

Fig. 13 and 14 are front and top views of an upper portion of the slide clamp.

In the figure, the guide rail II, the guide rail I, the central rotating hole, the protractor, the guide rail waist with wave-shaped lines, the guide rail upper part, the guide rail lower part, the compasses writing and positioning joint, the hollow fixed connector, the positioning salient point of the fixed connector, the protractor, the compass writing and positioning joint, the compass writing and,

The pointer positioning salient point of the guide rail in two directions,

A guide rail two-direction pointer ring,

An auxiliary ruler with scales,

A scale with a ruler,

The lower part of the sliding clamping seat,

A connecting hole,

A threaded hole,

A scale observation hole,

Angle measurement scale,

Figure DEST_PATH_GSB00001899972400000210

Bearing inner ring threads,

Figure DEST_PATH_GSB00001899972400000211

A bearing inner ring flange,

Figure DEST_PATH_GSB00001899972400000212

A screw thread positioning clip,

Figure DEST_PATH_GSB00001899972400000213

A movable cap of a thread positioning clip,

Figure DEST_PATH_GSB00001899972400000214

A spring,

Figure DEST_PATH_GSB00001899972400000215

The upper part of the sliding clamping seat,

Figure DEST_PATH_GSB00001899972400000216

A hollow connecting screw with a nut,

Figure DEST_PATH_GSB00001899972400000217

A threaded hole,

Figure DEST_PATH_GSB00001899972400000218

A clamping piece with a scale pointer,

Figure DEST_PATH_GSB00001899972400000219

Scale reading wells.

Detailed Description

The positioning convex point of the positive and negative fixed connectors in the hollow fixed connector is aligned with the positioning clamping groove in the central rotating hole of the guide rail II and then clamped into the central rotating hole of the guide rail I, and then the positioning convex point is led into the central rotating hole of the guide rail I

Figure DEST_PATH_GSB00001899972400000220

The pointer positioning convex point in the two directions of the guide rail is aligned with the notch on the hollow fixed connector and then clamped tightly, and the guide rail I and the guide rail II are formed into a wholeThe angle can be confirmed by the protractor scales corresponding to the pointer, and the length of line segments on two sides of the angle can be confirmed by the scales on the main scale.

Will be provided with

Two groups at the lower part of the sliding clamping seat are respectively clamped into the guide rail, and the requirements are met

The connecting hole and the central rotating hole are arranged at the same side of the guide rail, and the lower part of the sliding clamping seat

The threaded hole and the corrugation at the waist part of the guide rail are arranged at the same side and then screwed in

The screw thread positioning clip adjusts the friction force. Screw-out

Upper part of the sliding card seat

A nut with a hollow connecting screw for screwing the screw into

And screwing the nut on the flange.

Will be provided with

The auxiliary ruler with scales is placed on the upper part of the sliding clamping seat, and the screw thread positioning clip is screwed in to adjust the friction force. And connecting the compasses writing and positioning joint with corresponding equipment by using a sleeve, and completing tool assembly.

After the fixed connector is disassembled, the two guide rails are separated, and the device becomes a tool with four sides capable of randomly changing positions.

After use, the guide rail is rotated to make the included angle of 0 degree and simultaneously slides

The sliding clamping seat receives the two auxiliary rulers above the two guide rails, and the tool is stored into a compact whole.

Some examples are given below:

the first embodiment is as follows: the two guide rails are rotated to 180 degrees to form a plurality of axes, and the sliding clamping seat can be used as a fixed point and a moving point.

Example two: the two attached rulers are moved, and the included angle between the attached rulers and the guide rail is observed, so that the three-line octagonal demonstration can be realized.

Example three: the fixed attached ruler fixes the angle of the two guide rails due to the stability of the triangle, and the guide rails can be used as compasses.

Example four: the angle between the fixed attached ruler and the guide rail is a right angle, the number of the colluding strands can be verified, and the increase and decrease of the trigonometric function can be demonstrated.

Example five: the guide rails are separated, so that dynamic change from a common quadrangle to a parallelogram to a special parallelogram can be demonstrated, and the sum of internal angles of the quadrangles can also be demonstrated.

Example six: the two guide rails form a ninety degree angle, the scale value where the sliding clamping seat is located is a horizontal coordinate value and a vertical coordinate value, and a plane rectangular coordinate system can be demonstrated.

Example seven: the angle between the guide rail and the attached ruler is fixed at 108 degrees, so that a regular pentagon can be formed; in the same way, geometric figures such as regular hexagons, pentagons and the like can be made.

Example eight: the included angle between the guide rail and the attached ruler is fixed at 90 degrees by means of a straight line on the blackboard, and the property of the angular bisector can be demonstrated.

Example nine: the two attached rulers are moved and are parallel through angle change, and the relation of corresponding sides of similar triangles can be demonstrated.

Example ten: by controlling the angle between the guide rail and the attached ruler and the length of the guide rail and the attached ruler, the congruent relationship of any triangle can be demonstrated.

Example eleven: the angle between the guide rail and the attached ruler is controlled, and geometric basic figures such as parallel lines, angle bisectors, isosceles triangles and the like can be demonstrated.

The basic principles and the main features of the invention and the advantages of the invention have been shown and described above, it will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, but that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. The plane geometric positioning drawing and dynamic demonstration tool is characterized in that: the device comprises two sliding guide rails with scales, narrow upper parts, wide lower parts and waist-tightening concave middle parts, two attached rulers with scales, a hollow fixed connector with a pointer and four sliding clamping seats; one end of each of the two guide rails is provided with a convex central rotating hole for installing a fixed connector, and the rotating center, the direction pointer of the guide rail II and the edges of the main scales of the two guide rails are on the same straight line; the waist-in part is provided with wave-shaped concave-convex lines with determined periods; one end of a central rotating hole of the guide rail is provided with an upper part of the section, the length of the section is cut off by taking one half of a semicircular angle measuring device as a standard so as to be convenient for marking angle scale lines, the circle center of the angle measuring device is superposed with the center of the central rotating hole, and the other half of the angle measuring device is connected below the bottom of the guide rail; one end of a central rotating hole of the second guide rail is provided with a lower part of the section, and the length is omitted so as to ensure that the two guide rails can rotate to the same straight line; two sliding clamping seats are clamped on a guide rail in a group, the concave-convex conditions in the sliding clamping seats are matched with the guide rail so as to slide on the guide rail, the sliding clamping seats are provided with angle measurement scales, and the upper parts of the sliding clamping seats are provided with scale identification pointers and scale marks of a scale; the upper part and the lower part are connected through a bearing with threads and a flange on an inner ring and a hollow screw to ensure that the scales required by the upper part and the lower part are on the same point.

2. A planar geometric positioning construction and dynamic demonstration tool as claimed in claim 1 wherein: two sliding guide rails with scales, narrow top, wide bottom and waist-in-middle are arranged at one end of each sliding guide rail, compasses rotating and positioning and writing tools are arranged at the tail parts of the two guide rails, and sleeves with corresponding sizes can be connected; the centers of the central rotating holes of the two guide rails are positioned on a straight line where one edge of the guide rail is positioned, and the central rotating hole of the second guide rail is provided with a positioning clamping groove to ensure that the relative positions of the fixed connector and the second guide rail are unchanged; a bearing is arranged in a central rotating hole of the first guide rail, and the thickness of the two central rotating holes respectively accounts for half of the thickness of the lower part of the guide rail and are staggered; scales for measuring the length are engraved on the two edges and the upper part of each guide rail, the minimum measurement unit of the scales can be determined according to the actual requirement, and the main scales on the edges of the central rotating holes of the two guide rails need to use the center of the central rotating hole as a scale of 0 so as to measure the angle and the side length at the same time; one end of a central rotating hole of the guide rail I is provided with the upper part and the waist part of the guide rail, so that the lower plane of the guide rail is provided with a scale mark of a half protractor, and the other half part of the protractor is connected below the bottom of the unified guide rail, so that the two parts form a unified semicircular protractor which is not on the same plane, and the measuring center of the protractor is superposed with the center of the central rotating hole; the protractor is specially marked with scale marks of 15 degrees, 22.5 degrees, 30 degrees, 36 degrees, 45 degrees, 60 degrees, 72 degrees, 90 degrees, 108 degrees, 120 degrees and 150 degrees; one end of a central rotating hole of the second guide rail is provided with a lower part of the section, and the length is omitted so as to ensure that the two guide rails can rotate to the same straight line; the middle sunken waist-contracting parts of the two guide rails are provided with wave-shaped concave-convex lines with fixed periods, and the concave-convex periods are correspondingly matched with the minimum measurement unit of the main scale, so that the sliding clamping seat is convenient to position.

3. A planar geometric positioning construction and dynamic demonstration tool as claimed in claim 1 wherein: the hollow fixed connector can observe the end point of the existing line; the size of the hollow fixed connector is matched with that of the central rotating hole; the bottom of the hollow fixed connector is provided with a flange, and a convex positioning point is matched with a positioning clamping groove of a central rotating hole of the guide rail II; a gap is arranged above the hollow fixed connector and is matched with the positioning salient point of the pointer in the two directions of the guide rail.

4. A planar geometric positioning construction and dynamic demonstration tool as claimed in claim 1 wherein: the middle of the pointer in the two directions of the guide rail is provided with a circular ring, the pointer is sharp, one surface of each pointer is linear, and the straight line passes through the circle center of the circular ring.

5. A planar geometric positioning construction and dynamic demonstration tool as claimed in claim 1 wherein: the middle of the two scale-attached rulers is convex, so that the recognition function is realized; the two auxiliary scales with scales are provided with scales on two sides by taking the convex middle position as 0 scale, so that the scale can be conveniently obtained by summing any length.

6. A planar geometric positioning construction and dynamic demonstration tool as claimed in claim 1 wherein: the sliding clamping seat is divided into an upper part and a lower part which are connected by a bearing and a hollow screw; the concave-convex condition of the hollow interior of the lower part of the sliding clamping seat is matched with the appearance of the guide rail, so that the clamping seat can freely slide on the guide rail in a linear direction; one side of the lower part of the sliding clamping seat is provided with a threaded hole with a convex inner part for installing a threaded positioning clamp; the lower part of the sliding clamping seat is provided with a connecting hole, and the center of the connecting hole is orthographically projected on the straight line where the edge of the main scale of the guide rail is located; the upper plane of the lower part of the sliding clamping seat is provided with angle measuring scale marks taking the connecting hole as a circle center, and particularly marked with scale marks of 15 degrees, 22.5 degrees, 30 degrees, 36 degrees, 45 degrees, 60 degrees, 72 degrees, 90 degrees, 108 degrees, 120 degrees and 150 degrees.

7. A planar geometric positioning construction and dynamic demonstration tool as claimed in claim 1 wherein: the thread positioning clamp comprises three parts, including an outer circular convex movable cap, a spring and a hollow screw with a head, and the device transmits pressure to the movable cap through the elastic screw to loosen or compress the spring so as to adjust the friction force between the corrugated concave-convex lines on the movable cap and the guide rail and realize relative positioning.

8. A planar geometric positioning construction and dynamic demonstration tool as claimed in claim 1 wherein: a bearing is fixed in the connecting hole, and the inner ring of the bearing is provided with a thread and a flange so as to ensure effective connection with the screw on the upper part of the sliding clamping seat and reduce friction force; the nut is arranged on the screw on the upper part of the sliding clamping seat, so that the friction force when the attached ruler rotates can be adjusted; the flange is used for assisting in screwing the hollow screw in the upper half part of the sliding positioning clamping seat; the upper part of the sliding clamping seat is provided with a clamping part with a scale pointer, and the position of the edge of the scale can be restrained; the orthographic projection of the scale pointer needle point of the clamping piece is positioned at the center of the connecting hole below the sliding clamping seat; the upper side of the upper part of the sliding clamping seat is provided with a threaded hole with a convex inner part for mounting a threaded positioning clamp; there is a scale value observation hole to observe the scale value.