CN216033424U

CN216033424U - Proportional scale compasses

Info

Publication number: CN216033424U
Application number: CN202121709402.0U
Authority: CN
Inventors: 王丽; 费绍金; 季海波; 卫丽华
Original assignee: Suqian College
Current assignee: Suqian College
Priority date: 2021-07-26
Filing date: 2021-07-26
Publication date: 2022-03-15
Anticipated expiration: 2031-07-26

Abstract

The utility model discloses a scale compasses, relating to the technical field of mathematical teaching aids. Including central pivot, cover shell, first landing leg and second landing leg, the bottom of central pivot is provided with the cover shell, one side activity of cover shell bottom is provided with first landing leg, the one end activity of first landing leg is provided with needle point fastening nut, the fixed needle point that is provided with in needle point fastening nut's bottom, the opposite side activity of cover shell bottom is provided with the second landing leg, the fixed scale mark that is provided with in front of second landing leg, the one end activity of second landing leg is provided with nib fastening nut. Through setting up circular arc scale plate and scale mark, with the distance between the first landing leg of hand control and the second landing leg, when the second scale mark on the circular arc scale plate coincides with the scale mark on the second landing leg, the radius of circle corresponds specific numerical value, need not additionally with the help of the ruler, just can accomplish accurate mapping.

Description

Proportional scale compasses

Technical Field

The utility model relates to the technical field of mathematical teaching aids, in particular to a scale and compasses.

Background

The auxiliary teaching aid of mathematical education has a lot, and the graphics primitive is the indispensable instrument of giving lessons of mathematics teacher, and the teacher need draw various figures such as coordinate graph, table, circular on the blackboard, in order to draw chart etc. more formal, and the blackboard-writing is pleasing to the eye, and the teacher often need take various graphics primitives such as compasses, ruler, various teaching aids such as angulometer when giving lessons.

For beginners who just contact with the compasses, the compasses are mainly used for drawing circles with the radius of an integer centimeter, and due to the fact that various drawing tools are used in operation, the compasses are not beneficial to the use of the beginners, the radii are difficult to accurately measure, and teaching time is wasted. Therefore, a new compasses is needed to be provided, so that a beginner can accurately draw pictures, and the operation is simple and convenient.

SUMMERY OF THE UTILITY MODEL

The utility model provides a scale compasses, which has the advantage of accurate drawing and solves the problem of larger error.

In order to realize the purpose of accurate mapping, the utility model provides the following technical scheme: a scale dividing compass comprises a central rotating shaft, a casing, a first support leg and a second support leg, wherein the casing is arranged at the bottom of the central rotating shaft, the first support leg is movably arranged at one side of the bottom of the casing, a needle point fastening nut is movably arranged at one end of the first support leg, a needle point is fixedly arranged at the bottom of the needle point fastening nut, the second support leg is movably arranged at the other side of the bottom of the casing, scale marks are fixedly arranged on the front surface of the second support leg, a pen point fastening nut is movably arranged at one end of the second support leg, a pen point is movably arranged in the pen point fastening nut, an arc scale dividing plate is movably arranged on the front surface of the first support leg, bolts are respectively arranged on the inner walls of the first support leg and the arc scale dividing plate, the surface of each bolt is in threaded connection with a dividing plate fastening nut, and a second scale mark is fixedly arranged on the front surface of the arc scale dividing plate, the spout has been seted up to the inboard of circular arc scale, the spout is the arc form, the inner wall of spout and second landing leg all is provided with the second bolt, the surperficial threaded connection of second bolt has landing leg fastening nut.

As a preferable technical scheme of the utility model, the needle point fastening nut is provided with a thread groove on the inner side, and the inner wall of the thread groove is connected with a threaded rod in a threaded manner.

In a preferred embodiment of the present invention, the nib fastening nut has a threaded groove formed on an inner side thereof, and a second threaded rod is threadedly coupled to an inner wall of the threaded groove

As a preferred technical scheme of the utility model, clamping plates are arranged on two sides of the pen point, a movable plate is fixedly arranged on one side of each clamping plate, and a positive screw rod and a negative screw rod are movably arranged on the inner wall of each movable plate.

As a preferred technical scheme of the utility model, both ends of the positive and negative screw rods are respectively provided with a positive thread and a negative thread, the inner side of the movable plate is provided with a thread groove, and the positive thread and the negative thread of the positive and negative screw rods are in reverse synchronous transmission through the thread groove.

As a preferable technical scheme of the utility model, one side of the clamping plate is fixedly provided with a convex block, and the convex block is hemispherical.

Compared with the prior art, the utility model provides the scale compasses, which have the following beneficial effects:

1. this scale compasses, through setting up circular arc scale plate and scale mark, with the distance between the first landing leg of hand control and the second landing leg, when the second scale mark on the circular arc scale plate coincides with the scale mark on the second landing leg, the radius of circle corresponds specific numerical value, need not additionally with the help of the ruler, just can accomplish accurate mapping.

2. This scale compasses, through setting up landing leg fastening nut, the user only needs to screw up landing leg fastening nut, just can fix the second landing leg of accomplishing of adjusting to the distance between fixed second landing leg and the first landing leg prevents that the second landing leg from sliding, avoids producing too big error because of operation process.

3. This scale compasses through setting up splint, fly leaf and positive and negative lead screw, and positive and negative lead screw drives splint and removes to carry out the centre gripping to the nib and fix, the person of facilitating the use installs or dismantles the nib, the person of facilitating the use nib of renewing.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a structural elevation view of the present invention;

FIG. 3 is a schematic view of a nib fastening nut according to the present invention;

FIG. 4 is an enlarged view of part A of the present invention.

In the figure: 1. a central rotating shaft; 101. a housing; 2. a first leg; 201. a needle tip fastening nut; 202. a needle tip; 203. a threaded rod; 3. a second leg; 301. scale lines; 302. a nib fastening nut; 303. a second threaded rod; 4. a pen point; 401. a splint; 402. a movable plate; 403. a positive and negative screw rod; 404. a bump; 5. a circular arc scale plate; 501. a bolt; 502. the scale plate fastens the nut; 503. a chute; 504. a second bolt; 505. a support leg fastening nut; 506. a second tick mark.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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 invention.

Referring to fig. 1-4, the utility model discloses a proportional scale compasses, comprising a central rotating shaft 1, a casing 101, a first leg 2 and a second leg 3, wherein the casing 101 is arranged at the bottom of the central rotating shaft 1, the first leg 2 is movably arranged at one side of the bottom of the casing 101, a needle point fastening nut 201 is movably arranged at one end of the first leg 2, a needle point 202 is fixedly arranged at the bottom of the needle point fastening nut 201, the second leg 3 is movably arranged at the other side of the bottom of the casing 101, scale marks 301 are fixedly arranged on the front surface of the second leg 3, a pen point fastening nut 302 is movably arranged at one end of the second leg 3, a pen point 4 is movably arranged in the pen point fastening nut 302, an arc proportional scale 5 is movably arranged on the front surface of the first leg 2, bolts 501 are arranged on the inner walls of the first leg 2 and the arc proportional scale 5, the surface of the bolt 501 is in threaded connection with a scale plate fastening nut 502, the front face of the circular arc scale plate 5 is fixedly provided with second scale marks 506, the inner side of the circular arc scale plate 5 is provided with a sliding groove 503, the sliding groove 503 is arc-shaped, the inner walls of the sliding groove 503 and the second support leg 3 are both provided with a second bolt 504, and the surface of the second bolt 504 is in threaded connection with a support leg fastening nut 505.

Specifically, a thread groove is formed on the inner side of the needle point fastening nut 201, and a threaded rod 203 is connected to the inner wall of the thread groove in a threaded manner.

In this embodiment, by providing the needle tip fastening nut 201 and the threaded rod 203, the needle tip 202 can be mounted on the first leg 2 by the threaded connection of the needle tip fastening nut 201 and the threaded rod 203.

Specifically, a thread groove is formed on the inner side of the pen point fastening nut 302, and a second threaded rod 303 is connected to the inner wall of the thread groove in a threaded manner.

In this embodiment, by providing the pen tip fastening nut 302 and the second threaded rod 303, the pen tip 4 can be attached to the second leg 3 by screwing the pen tip fastening nut 302 to the second threaded rod 303.

Specifically, clamping plates 401 are arranged on two sides of the pen point 4, a movable plate 402 is fixedly arranged on one side of each clamping plate 401, and a positive screw rod 403 and a negative screw rod 403 are movably arranged on the inner wall of the movable plate 402.

In this embodiment, through setting up splint 401, fly leaf 402 and positive and negative lead screw 403, positive and negative lead screw 403 drives splint 401 and removes to it is fixed to carry out the centre gripping to nib 4, and the person of facilitating the use installs or dismantles nib 4, and the person of facilitating the use updates nib 4.

Specifically, a forward thread and a reverse thread are respectively arranged at two ends of the forward and reverse screw rods 403, a thread groove is formed in the inner side of the movable plate 402, and reverse synchronous transmission is performed on the forward thread and the reverse thread of the forward and reverse screw rods 403 through the thread groove.

In this embodiment, the positive and negative threads on the positive and negative lead screw 403 and the thread groove on the movable plate 402 are arranged, and the rotating positive and negative lead screw 403 is connected with the thread of the movable plate 402 by the positive and negative threads to drive the clamping plates 401 on both sides to perform reverse synchronous movement.

Specifically, a convex block 404 is fixedly arranged on one side of the clamping plate 401, and the convex block 404 is hemispherical.

In this embodiment, by providing the protrusion 404, the protrusion 404 can enhance the friction between the pen tip 4 and the clamp plate 401, thereby further improving the clamping effect.

The working principle and the using process of the utility model are as follows: when the drawing instrument is used, the needle point fastening nut 201 is screwed into the first supporting leg 2, then the pen point fastening nut 302 is screwed into the second supporting leg 3, when a pen point 4 is installed, the positive and negative screw rods 403 are rotated, the rotated positive and negative screw rods 403 are connected with the threads of the movable plate 402 through the positive and negative threads, the clamping plates 401 on two sides are driven to move reversely and synchronously, the pen point 4 is clamped and fixed, the clamping plates 401 are separated from the pen point 4, the pen point 4 can be detached, before drawing, the distance between the first supporting leg 2 and the second supporting leg 3 is controlled by hands, the second scale marks 506 on the circular arc scale dividing plate 5 are compared according to actual requirements, when the second scale marks 506 on the circular arc scale dividing plate 5 are overlapped with the scale marks 301 on the second supporting leg 3, the supporting leg fastening nut 505 is screwed, and drawing operation is performed.

In summary, in the scale compasses, by arranging the needle point fastening nut 201 and the threaded rod 203, the needle point 202 can be mounted on the first support leg 2 by the threaded connection of the needle point fastening nut 201 and the threaded rod 203, by arranging the pen point fastening nut 302 and the second threaded rod 303, the pen point 4 can be mounted on the second support leg 3 by the threaded connection of the pen point fastening nut 302 and the second threaded rod 303, by arranging the clamping plate 401, the movable plate 402 and the positive and negative screw rod 403, the positive and negative screw rod 403 drives the clamping plate 401 to move, so as to clamp and fix the pen point 4, thereby facilitating the mounting or dismounting of the pen point 4 by a user, facilitating the user to replace the new pen point 4, by arranging the positive and negative threads on the positive and negative screw rod 403 and the threaded groove on the movable plate 402, the rotating positive and negative screw rod 403 is connected with the threads of the movable plate 402 by the positive and negative threads, so as to drive the clamping plates 401 on both sides to move reversely and synchronously, by providing the projection 404, the friction between the holder 401 and the pen tip 4 can be enhanced by the projection 404, and the holding effect can be further improved.

It should be noted that, in this document, terms such as "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a scale compasses, includes central pivot (1), cover (101), first landing leg (2) and second landing leg (3), its characterized in that: a sleeve (101) is arranged at the bottom of the central rotating shaft (1), a first supporting leg (2) is movably arranged on one side of the bottom of the sleeve (101), a needle point fastening nut (201) is movably arranged at one end of the first supporting leg (2), a needle point (202) is fixedly arranged at the bottom of the needle point fastening nut (201), a second supporting leg (3) is movably arranged on the other side of the bottom of the sleeve (101), scale marks (301) are fixedly arranged on the front surface of the second supporting leg (3), a pen point fastening nut (302) is movably arranged at one end of the second supporting leg (3), a pen point (4) is movably arranged in the pen point fastening nut (302), an arc proportional scale plate (5) is movably arranged on the front surface of the first supporting leg (2), and bolts (501) are arranged on the inner walls of the first supporting leg (2) and the arc proportional scale plate (5), the surface threaded connection of bolt (501) has scale plate fastening nut (502), the fixed second scale mark (506) that is provided with in front of circular arc scale plate (5), spout (503) have been seted up to the inboard of circular arc scale plate (5), spout (503) are the arc form, the inner wall of spout (503) and second landing leg (3) all is provided with second bolt (504), the surface threaded connection of second bolt (504) has landing leg fastening nut (505).

2. The scale compasses of claim 1, wherein: the inner side of the needle point fastening nut (201) is provided with a thread groove, and the inner wall of the thread groove is in threaded connection with a threaded rod (203).

3. The scale compasses of claim 1, wherein: the inner side of the pen point fastening nut (302) is provided with a thread groove, and the inner wall of the thread groove is in threaded connection with a second threaded rod (303).

4. The scale compasses of claim 1, wherein: both sides that have nib (4) all are provided with splint (401), one side of splint (401) is fixed and is provided with fly leaf (402), the inner wall activity of fly leaf (402) is provided with positive and negative lead screw (403).

5. The scale compasses of claim 4, wherein: the two ends of the positive and negative screw rod (403) are respectively provided with a positive thread and a negative thread, the inner side of the movable plate (402) is provided with a thread groove, and the positive thread and the negative thread of the positive and negative screw rod (403) are in reverse synchronous transmission through the thread groove.

6. The scale compasses of claim 4, wherein: a convex block (404) is fixedly arranged on one side of the clamping plate (401), and the convex block (404) is hemispherical.