CN211764536U

CN211764536U - Teaching compasses chi that mathematics was used

Info

Publication number: CN211764536U
Application number: CN201920316111.1U
Authority: CN
Inventors: 杨淑菊
Original assignee: Yunnan College of Bussiness Management
Current assignee: Yunnan College of Bussiness Management
Priority date: 2019-03-13
Filing date: 2019-03-13
Publication date: 2020-10-27
Anticipated expiration: 2029-03-13

Abstract

The utility model discloses a teaching compasses chi that mathematics was used, including a fixed cylinder, a fixed cylinder top fixedly connected with handle, the fixed bearing of installing of inlaying of solid fixed cylinder bottom inner chamber, bearing middle part fixedly connected with reference column, the perpendicular fixedly connected with horizontal pole in fixed cylinder right side middle part, and horizontal pole top intermediate position prolong its length direction and seted up the shifting chute. The utility model discloses a setting has the fixed section of thick bamboo of bearing and support column, confirms the centre of a circle through the reference column, rotates fixed section of thick bamboo through the one hand and can rotate the drawing circle to fixed section of thick bamboo right side sets up the horizontal pole that has the shifting chute, and the screwed pipe can remove in the shifting chute, conveniently adjusts the radius of drawing the circle, simple structure, convenient operation, and is comparatively practical, is fit for extensively promoting and using.

Description

Teaching compasses chi that mathematics was used

Technical Field

The utility model relates to a mathematics education field, in particular to teaching compasses chi that mathematics was used.

Background

At present, compasses are tools for drawing circles or strings in mathematics and drawing, and are commonly used for drawing by ruler and compasses. The compasses ruler is a teaching aid indispensable to teachers in mathematical education, and in mathematical education, circles are often required to be drawn on a blackboard, and most teachers draw by compasses.

However, the traditional large compasses used on the classroom are composed of two feet, one foot has a sharp foot, and the other corner fixes chalk, so the compasses have low drawing efficiency, cannot be used for drawing concentric circles, and have poor stability, complex structure and inconvenient operation during drawing. Therefore, we propose a teaching compass ruler for mathematics.

SUMMERY OF THE UTILITY MODEL

A primary object of the present invention is to provide a teaching compass ruler for mathematics, which can effectively solve the problems of the background art.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a teaching compasses chi that mathematics was used, includes a fixed section of thick bamboo, a fixed section of thick bamboo top fixedly connected with handle, the fixed bearing of installing of inlaying of fixed bobbin base portion inner chamber, bearing middle part fixedly connected with reference column, the perpendicular fixedly connected with horizontal pole in fixed section of thick bamboo right side middle part, and horizontal pole top intermediate position prolong its length direction and seted up the shifting chute, the activity is pegged graft in the shifting chute has the screwed pipe, the nut has been cup jointed to screwed pipe lower part screw thread, screwed pipe upper end screw thread fastening connection has the screw thread closing cap, the vertical perforation of having seted up in screw thread closing cap middle part, vertical downward activity through connection has T type pole in the perforation.

Furthermore, a positioning disc is fixedly connected to the upper position of the middle part of the threaded pipe.

Furthermore, scale marks are sequentially printed on the front side of the cross rod from left to right.

Furthermore, the lower end of the T-shaped rod is horizontally and fixedly connected with an extrusion plate, and a spring is sleeved on the T-shaped rod between the upper part of the extrusion plate and the bottom of the threaded sealing cover.

Furthermore, the inner diameter of the threaded pipe is matched with the maximum diameter of the chalk.

Compared with the prior art, the utility model discloses following beneficial effect has:

1. the utility model discloses a teaching compasses chi that mathematics was used has the fixed section of thick bamboo of bearing and support column through the setting, confirms the centre of a circle through the reference column, rotates fixed section of thick bamboo through the one hand and can rotate the drawing circle to fixed section of thick bamboo right side sets up the horizontal pole that has the shifting chute, and the screwed pipe can remove in the shifting chute, the radius of drawing the circle of convenient adjustment, simple structure, convenient operation.

2. The utility model discloses a teaching compasses chi that mathematics was used owing to at the horizontal fixedly connected with stripper plate of T type pole lower extreme, is located the spring has been cup jointed on the T type pole between stripper plate top and the screw thread sealing cap bottom, and the stripper plate of T type pole lower extreme can extrude the chalk of screwed pipe inner chamber, makes things convenient for the spring can shorten along with the use of chalk and can extrude the chalk laminating all the time on the blackboard.

Drawings

Fig. 1 is a schematic view of the overall structure of the teaching compass ruler for mathematics of the present invention;

FIG. 2 is a schematic view of the cross-sectional structure of the threaded pipe of the teaching compass ruler for mathematics of the present invention;

figure 3 is the utility model discloses the scale mark of teaching compasses chi that mathematics was used is at horizontal pole front side structure sketch map.

In the figure: 1. a fixed cylinder; 2. a handle; 3. a bearing; 4. a positioning column; 5. a cross bar; 6. a moving groove; 7. a nut; 8. a threaded pipe; 9. a pressing plate; 10. positioning a plate; 11. sealing the cover by screw threads; 12. a T-shaped rod; 13. perforating; 14. a spring; 15. scale lines are marked.

Detailed Description

In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the present invention is further described below with reference to the following embodiments.

As shown in fig. 1-3, a teaching compass ruler for mathematics comprises a fixed cylinder 1, wherein a handle 2 is fixedly connected to the top of the fixed cylinder 1, a bearing 3 is fixedly embedded in an inner cavity at the bottom of the fixed cylinder 1, a positioning column 4 is fixedly connected to the middle of the bearing 3, a cross rod 5 is fixedly connected to the middle of the right side of the fixed cylinder 1 in a perpendicular mode, a moving groove 6 is formed in the middle of the top of the cross rod 5 along the length direction of the cross rod, a threaded pipe 8 is movably inserted in the moving groove 6, a nut 7 is sleeved on the lower portion of the threaded pipe 8 through threads, a threaded seal cover 11 is tightly connected to the upper end of the threaded pipe 8 through threads, a through hole 13 is vertically formed in the middle of the threaded seal cover 11, and a T-shaped.

In this embodiment, as shown in fig. 1 and 2, the fixed cylinder 1 with the bearing 3 and the support column 4 is arranged, the center of a circle is determined through the positioning column 4, the fixed cylinder 1 can be rotated to draw a circle by rotating the fixed cylinder 1 with one hand, the cross rod 5 with the moving groove 6 is arranged on the right side of the fixed cylinder 1, the threaded pipe 8 can move in the moving groove 6, the radius of the drawn circle can be adjusted conveniently, and the circular drawing machine is simple in structure and convenient to operate.

Wherein, the upper position of the middle part of the threaded pipe 8 is fixedly connected with a positioning disc 10.

In this embodiment, as shown in fig. 2 and 3, the positioning plate 10 prevents the threaded pipe 8 from being disengaged from the moving groove 6.

Wherein, scale marks 15 are sequentially printed on the front side of the cross rod 5 from left to right.

In this embodiment, as shown in fig. 3, it is convenient for the user to preliminarily determine the radius of the circle, so as to improve the drawing efficiency.

The lower end of the T-shaped rod 12 is horizontally and fixedly connected with an extrusion plate 9, and a spring 14 is sleeved on the T-shaped rod 12 between the upper part of the extrusion plate 9 and the bottom of the threaded sealing cover 11.

In the embodiment, as shown in fig. 2, the extrusion plate 9 at the lower end of the T-shaped rod 12 can extrude chalk in the inner cavity of the threaded pipe 8, so that the spring 14 can extrude the chalk to be attached to the blackboard all the time along with shortening of the chalk.

Wherein, the inner diameter of the threaded pipe 8 is matched with the maximum diameter of the chalk.

In this embodiment, as shown in fig. 2, the threaded pipe 8 can be used for placing chalk, which is convenient for teaching.

The working principle is as follows: during the use, peg graft the chalk in screwed pipe 8, confirm screwed pipe 8 in the position of the shifting chute 6 of horizontal pole 5 through the scale mark, rotate nut 7 and stabilize screwed pipe 8 on horizontal pole 5, again with reference column 4 through 2 extrusion laminatings of handle on the blackboard, it drives horizontal pole 5 and is circular motion to rotate handle 2, can draw circle convenient and fast, the stripper plate 9 of T type pole 12 lower extreme can extrude the chalk of 8 inner chambers of screwed pipe, make things convenient for spring 14 can shorten along with the use of chalk and can extrude the chalk laminating all the time on the blackboard.

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 understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a teaching compasses chi that mathematics was used, includes a fixed section of thick bamboo (1), its characterized in that: fixed cylinder (1) top fixedly connected with handle (2), fixed cylinder (1) bottom inner chamber is fixed to be inlayed and is installed bearing (3), bearing (3) middle part fixedly connected with reference column (4), fixed cylinder (1) right side middle part perpendicular fixedly connected with horizontal pole (5), and horizontal pole (5) top intermediate position prolong its length direction and seted up shifting chute (6), shifting chute (6) internalization is pegged graft there is screwed pipe (8), nut (7) have been cup jointed to screwed pipe (8) lower part screw thread, screwed pipe (8) upper end screw thread fastening connection has screw thread closing cap (11), the vertical perforation (13) of having seted up in screw thread closing cap (11) middle part, the vertical downward activity through connection has T type pole (12) in perforation (13).

2. A mathematical teaching compass according to claim 1, wherein: the upper position of the middle part of the threaded pipe (8) is fixedly connected with a positioning disc (10).

3. A mathematical teaching compass according to claim 1, wherein: scale marks (15) are sequentially printed on the front side of the cross rod (5) from left to right.

4. A mathematical teaching compass according to claim 1, wherein: the lower end of the T-shaped rod (12) is horizontally and fixedly connected with an extrusion plate (9), and a spring (14) is sleeved on the T-shaped rod (12) between the upper part of the extrusion plate (9) and the bottom of the threaded sealing cover (11).

5. A mathematical teaching compass according to claim 1, wherein: the inner diameter of the threaded pipe (8) is matched with the maximum diameter of the chalk.