CN211918209U

CN211918209U - Compasses for students

Info

Publication number: CN211918209U
Application number: CN202020562661.4U
Authority: CN
Inventors: 蒋殷思成
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-04-16
Filing date: 2020-04-16
Publication date: 2020-11-13
Anticipated expiration: 2030-04-16

Abstract

The utility model discloses a student uses compasses, including installation shell cover and two compasses branch, two compasses branch tops are installed on the installation shell through compasses connecting axle hinge, and one of them compasses branch lower extreme is provided with the compasses pointed end, and the drawing pen is installed to another compasses branch lower extreme, the most advanced top of compasses is rotated with compasses branch bottom and is connected, and compasses branch bottom is provided with the installation pole axle of being connected with it rotation on connecting seat and the connecting seat, the most advanced top of compasses is fixed on installation pole axle lateral wall, and installation pole shaft end portion is provided with the pendulum rod, and compasses branch lower extreme still is provided with the arc pole with installation pole shaft axis as the center, a plurality of connecting holes have been seted up on the arc pole, are provided with second fastening bolt on the pendulum rod. The utility model discloses simple structure can improve the stability of support and increase the drawing accuracy, the operation of being convenient for, and the practicality is stronger.

Description

Compasses for students

Technical Field

The utility model relates to a learning tool technical field specifically is a student uses compasses.

Background

At present, in the teaching of mathematical drawing, the compasses are required to be used in the teaching of teachers and the learning of students, but the compasses for drawing circular arcs and circles on a blackboard at present are generally used for drawing planes perpendicular to the planes to be drawn by readjusting a steel needle and a drawing pen on the lower parts of supporting legs after two supporting legs of the compasses are separated, and then drawing is carried out by taking the connecting point of the steel needle and the planes to be drawn as the circle center.

When the student uses the compasses, the student needs to expand the two supporting legs and insert the tip at the lower end of one of the supporting legs into the plane plate, but when the expanding angle of the two supporting legs is larger, the tip is inclined and easy to slip off, so that the accuracy of drawing is influenced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a student uses compasses to solve the easy slippage's of compasses pointed end problem.

In order to achieve the above object, the utility model provides a following technical scheme:

the utility model provides a student uses compasses, is including installation shell cover and two compasses branch, and two compasses branch tops are installed on the installation shell cover through the compasses connecting axle is articulated, and one of them compasses branch lower extreme is provided with the compasses pointed end, and the drawing pen is installed to another compasses branch lower extreme, the most pointed end of compasses is rotated with compasses branch bottom and is connected, and compasses branch bottom is provided with connecting seat and is provided with the installation lever shaft of rotating the connection with it on the connecting seat, the most pointed top of compasses is fixed on installation lever shaft lateral wall, and installation lever shaft tip is provided with the pendulum rod, and compasses branch lower extreme still is provided with the arc pole with installation lever shaft axis as the center, a plurality of connecting holes have been seted up on the arc pole, is.

On the basis of the technical scheme, the utility model discloses still provide following optional technical scheme:

in one alternative: the top end part of the compass is provided with a support, a rotating rod is arranged between the compass top end and the support, the lower end of the rotating rod is rotatably connected with the support, and the top end of the rotating rod is connected with the lower end of the compass top end into a whole.

In one alternative: the drawing pen is detachably mounted at the lower end of the compass support rod, the lower end of the compass support rod is provided with a mounting seat, an inserting cylinder used for inserting the drawing pen is arranged on the mounting seat, and a first fastening bolt is arranged on the outer wall of the inserting cylinder.

In one alternative: and the top of the mounting shell is provided with an operating end.

In one alternative: the compass support rod wall is provided with a guide arc plate which takes the axis of the compass connecting shaft as the center, the guide arc plate penetrates through the side wall of the other compass support rod, the upper end face and the lower end face of the guide arc plate are both provided with grooves, the inner wall of each groove is provided with a protrusion, and the compass support rod wall is provided with a third fastening bolt of which the end part can be screwed in and tightly press the guide arc plate.

Compared with the prior art, the beneficial effects of the utility model are as follows:

this compasses drives the installation pole axle through stirring the pendulum rod and rotates and fix through the cooperation of second fastening bolt and connecting hole, and can adjust and keep the stable state to the angle between compasses point and the compasses branch to use and strut the angle when great at two compasses branches, through adjusting the most advanced state of remaining upright all the time of compasses, and then can make the compasses point press stably on the paper, avoided the most advanced slope of compasses to invert the slippage easily and influence the drawing accuracy. The utility model discloses simple structure can improve the stability of support and increase the drawing accuracy, the operation of being convenient for, and the practicality is stronger.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a partially enlarged schematic structural view of a portion a in fig. 1.

Fig. 3 is a schematic structural view of the middle guide arc plate of the present invention.

Notations for reference numerals: the compasses comprises an installation shell sleeve 1, a compasses support rod 2, a compasses connecting shaft 3, an installation seat 4, an insertion cylinder 5, a first fastening bolt 6, a drawing pen 7, an operation end 8, a connecting seat 9, an installation rod shaft 10, a compasses tip 11, an arc-shaped rod 12, a swing rod 13, a connecting hole 14, a second fastening bolt 15, a guide arc-shaped plate 16, a groove 17, a protrusion 18, a third fastening bolt 19, a rotating rod 20 and a support 21.

Detailed Description

The present invention will be described in detail with reference to the following embodiments, wherein like or similar elements are designated by like reference numerals throughout the drawings or description, and wherein the shape, thickness or height of the various elements may be expanded or reduced in practical applications. The embodiments of the present invention are provided only for illustration, and not for limiting the scope of the present invention. Any obvious and obvious modifications or alterations to the present invention can be made without departing from the spirit and scope of the present invention.

Example 1

Referring to fig. 1 to 3, in an embodiment of the present invention, a pair of compasses for students includes a mounting housing 1 and two compass supports 2, the top ends of the two compass supports 2 are pivotally mounted on the mounting housing 1 through a compass connecting shaft 3, the lower end of one of the compass supports 2 is provided with a compass tip 11, the lower end of the other one of the compass supports 2 is provided with a drawing pen 7, the top end of the compass tip 11 is rotatably connected with the bottom end of the compass support 2, the bottom end of the compass support 2 is provided with a connecting seat 9, the connecting seat 9 is provided with a mounting rod shaft 10 rotatably connected therewith, the top end of the compass tip 11 is fixed on the side wall of the mounting rod shaft 10, the end of the mounting rod shaft 10 is provided with a swing rod 13, the lower end of the compass support 2 is further provided with an arc rod 12 centering on the axis of the mounting rod shaft 10, the, when the compasses are used, the mounting rod shaft 10 can be driven to rotate by poking the swing rod 13 and is fixed through the matching of the second fastening bolt 15 and the connecting hole 14, the angle between the compass tip 11 and the compass support rods 2 can be adjusted and kept in a stable state, so that when the compasses are used and the two compass support rods 2 are spread to have larger angles, the compass tip 11 is always kept in an upright state through adjustment, the compass tip 11 can be pressed on paper stably, and the phenomenon that the compass tip 11 is inclined and easy to invert and slip to influence the drawing accuracy is avoided;

the bottom end part of the compass tip 11 is further provided with a support 21, a rotating rod 20 is arranged between the compass tip 11 and the support 21, the lower end of the rotating rod 20 is rotatably connected with the support 21, the top end of the rotating rod 20 is integrally connected with the lower end of the compass tip 11, and the support 21 can be contacted with a pressed paper and further maintain the support stability;

the utility model discloses a drawing pen, including compasses branch 2, drawing pen 7, installation shell cover 1 top is provided with operation end 8, the tip is detachable to be installed under the compasses branch 2, be provided with on 2 tip of compasses branch mount pad 4 and the mount pad 4 and be used for inserting the section of thick bamboo 5 that inserts of drawing pen 7, be provided with first fastening bolt 6 on inserting a section of thick bamboo 5 outer wall to but convenient to detach changes drawing pen 7, installation shell cover 1 top is provided with operation end 8.

Example 2

The embodiment of the utility model provides a difference with embodiment 1 lies in: a guide arc-shaped plate 16 taking the axis of the compass connecting shaft 3 as the center is arranged on the rod wall of one of the compass supporting rods 2, the guide arc-shaped plate 16 penetrates through the side wall of the other compass supporting rod 2, grooves 17 are formed in the upper end surface and the lower end surface of the guide arc-shaped plate 16, protrusions 18 are arranged on the inner wall of each groove 17, and a third fastening bolt 19 with the end part capable of being screwed into and pressing the guide arc-shaped plate 16 is arranged on the rod wall of the compass supporting rod 2; furthermore, after the angle between the two compass supports 2 is adjusted, the third fastening bolt 19 is screwed to press the guide arc plate 16 to limit the movement of the guide arc plate, so that the two compass supports 2 are fastened to keep a stable state to prevent the two compass supports 2 from rotating when drawing.

The above description is only for the specific embodiments of the present disclosure, but the scope of the present disclosure is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present disclosure, and all the changes or substitutions should be covered within the scope of the present disclosure. Therefore, the protection scope of the present disclosure shall be subject to the protection scope of the claims.

Claims

1. A pair of compasses for students comprises an installation shell sleeve (1) and two compass supporting rods (2), wherein the top ends of the two compass supporting rods (2) are hinged on the installation shell sleeve (1) through a compass connecting shaft (3), a compass tip (11) is arranged at the lower end of one of the compass supporting rods (2), a drawing pen (7) is arranged at the lower end of the other one of the compass supporting rods (2), the compasses are characterized in that the top end of the compass tip (11) is rotatably connected with the bottom ends of the compass supporting rods (2), a connecting seat (9) is arranged at the bottom end of the compass supporting rod (2), an installation rod shaft (10) rotatably connected with the connecting seat (9) is arranged on the connecting seat (9), the top end of the compass tip (11) is fixed on the side wall of the installation rod shaft (10), a swing rod (13) is arranged at the end part of the installation rod shaft (10), and an arc, the arc-shaped rod (12) is provided with a plurality of connecting holes (14), and the swing rod (13) is provided with a second fastening bolt (15).

2. The compasses for students according to claim 1, wherein a support (21) is further arranged at the bottom end part of the compasses tip (11), a rotating rod (20) is arranged between the compasses tip (11) and the support (21), the lower end of the rotating rod (20) is rotatably connected with the support (21), and the top end of the rotating rod (20) is connected with the lower end of the compasses tip (11) into a whole.

3. The compasses for students according to claim 1, wherein said drawing pen (7) is detachably mounted on the lower end of the compass support rod (2), the lower end of the compass support rod (2) is provided with a mounting seat (4), the mounting seat (4) is provided with an inserting tube (5) for inserting the drawing pen (7), and the outer wall of the inserting tube (5) is provided with a first fastening bolt (6).

4. The compasses for students according to claim 1, characterized in that the top of the mounting case (1) is provided with an operating end (8).

5. The student compasses of any one of claims 1 to 4, wherein a guide arc plate (16) centered on the axis of the compass connecting shaft (3) is provided on the rod wall of one of the compass supports (2), the guide arc plate (16) penetrates the side wall of the other compass support (2), grooves (17) are provided on the upper and lower end faces of the guide arc plate (16), a protrusion (18) is provided on the inner wall of the groove (17), and a third fastening bolt (19) having an end part screwed in and pressing the guide arc plate (16) is provided on the rod wall of the compass support (2).