CN215705369U

CN215705369U - Teaching compasses that chalk is difficult for fracture for junior middle school mathematics

Info

Publication number: CN215705369U
Application number: CN202121408909.2U
Authority: CN
Inventors: 刘海军
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-06-23
Filing date: 2021-06-23
Publication date: 2022-02-01
Anticipated expiration: 2031-06-23

Abstract

The utility model provides a teaching compass with a chalk difficult to break for junior high school mathematics, which comprises a sucker, an adjusting mechanism and a buffer mechanism, wherein the top of the sucker is fixedly connected with a connecting rod, the outer side of the connecting rod is fixedly connected with a bearing seat, the top of the bearing seat is fixedly connected with a fixed block, the top of the fixed block is rotatably connected with a cross rod through a rotating shaft, one side of the cross rod is provided with scale marks, the adjusting mechanism comprises a movable buckle, a threaded hole and a fixed bolt, and the movable buckle is sleeved on the outer side of the cross rod. The teaching compass with the chalk difficult to break for junior high school mathematics solves the problems that if a circle with a certain size needs to be drawn on a blackboard by the existing teaching compass, a ruler needs to be additionally arranged for measuring, the use is inconvenient, the phenomenon of chalk breakage is easy to occur during drawing, the use is inconvenient, and the teaching work of teachers is influenced.

Description

Teaching compasses that chalk is difficult for fracture for junior middle school mathematics

Technical Field

The utility model relates to the field of junior middle school teaching aids, in particular to a teaching compass with a chalk for junior middle school mathematics not easy to break.

Background

Compasses are tools used for drawing circles or strings in mathematics and drawing, are commonly used for drawing by rulers and compasses, and are characterized in that: the one side of handwriting is pasted and is connected the one side at the flap, the another side of flap is pasted and is connected in the middle of the one end of check chi, the crack upper end both sides of handwriting insert the both ends of connecting at the pivot, the axis body of pivot is worn the cover and is connected the upper end at the compasses landing leg, in the teaching aid of junior high school mathematics, the compasses is one of the most commonly used, it lies in the variation in size with the compasses that student used, the compasses of teaching usefulness are generally great, need carry out the mapping on the blackboard to students study.

When the circle of certain size is drawn on the blackboard to current teaching compasses, need additionally to be equipped with the ruler and get, it is comparatively inconvenient to use to the cracked phenomenon of chalk appears easily when drawing, and the use of being inconvenient influences mr's teaching work.

Therefore, a new teaching compass which is not easy to break by chalk for junior middle school mathematics is needed to solve the technical problems.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problems, the utility model provides the teaching compass which can draw a circle with a specified size and a chalk for junior and middle school mathematics, wherein the chalk is not easy to break, without an external tool.

The teaching compasses comprise a sucker, an adjusting mechanism and a buffer mechanism, wherein the top of the sucker is fixedly connected with a connecting rod, the outer side of the connecting rod is fixedly connected with a bearing seat, the top of the bearing seat is fixedly connected with a fixed block, the top of the fixed block is rotatably connected with a cross rod through a rotating shaft, and one side of the cross rod is provided with scale marks.

In order to achieve the effect of drawing circles according to the specified size, the utility model provides the teaching compasses with the chalk difficult to break for junior high school mathematics.

In order to achieve the effect of avoiding chalk breakage, the teaching compass for junior middle school mathematics provided by the utility model preferably comprises a buffer box, a first spring, a movable plate, a buffer rod and a buffer plate, wherein the top of the buffer box is fixedly connected with the bottom of a movable buckle, the first spring is welded at the top of an inner cavity of the buffer box, the movable plate is welded at one end of the first spring, the buffer rods are fixedly connected with four corners of the bottom of the movable plate, the buffer plate is fixedly connected with the bottom of the buffer rod, and the outer side of the movable plate is in sliding connection with the inner wall of the buffer box.

In order to achieve the effect of limiting the buffer rod, the teaching compasses for mathematics in junior and middle schools provided by the utility model have the advantages that the chalk is not easy to break, preferably, the limiting sleeve is sleeved on the outer side of the buffer rod, and the bottom of the limiting sleeve is fixedly connected with the bottom of the inner cavity of the buffer box.

In order to further avoid the chalk fracture, the teaching compasses for the junior middle school mathematics provided by the utility model have the advantages that the chalk is not easy to fracture, preferably, a second spring is sleeved on the outer side of the buffer rod, and one end of the second spring is welded with the top of the buffer plate.

In order to achieve the effect of facilitating the fixing of the movable buckle, the utility model provides the teaching compasses with the chalks for mathematics in junior and middle schools, preferably, the top of the cross rod is provided with a limiting groove matched with the fixing bolt for use, and the outer side of the fixing bolt is in sliding connection with the inner wall of the limiting groove.

In order to achieve the effect of improving the strength of the fixing bolt, the utility model provides the teaching compass with the chalk for junior middle school mathematics not easy to break.

In order to achieve the effect of facilitating hanging and storing of the device, the utility model provides the teaching compasses with the chalks for junior high school mathematics, preferably, one end of the cross rod is fixedly connected with the hanging plate, and one side of the hanging plate is fixedly connected with the hook.

Compared with the prior art, the utility model has the beneficial effects that:

the teaching compass with the chalk difficult to break for junior and middle school mathematics is characterized in that the chalk is plugged into a chalk sleeve arranged at the bottom of a buffer plate, then a sucker is sucked on a blackboard to determine the position of a circle center, a transverse rod can make circular motion around the sucker through the arrangement of a bearing seat and a connecting rod, the chalk in the chalk sleeve at the bottom of the buffer plate is driven to move through the transverse rod to finish circle drawing operation, if the chalk is blocked in the circle drawing process, the chalk sleeve can be driven to extrude the buffer plate, the buffer plate can extrude the buffer rod under stress, the buffer rod can move to extrude a movable plate under stress, the movable plate can extrude a first spring under stress, the first spring can deform under stress to absorb and offset the stress, so that the chalk is protected when the chalk is blocked, the chalk is prevented from breaking, when a circle with a specified size needs to be drawn, a fixing bolt can move through rotating the fixing bolt to remove the fixing of a moving buckle, the user can adjust the distance between removal buckle and the sucking disc this moment, set up the pointer through removal buckle department and cooperate the length that the scale mark judged this distance, radius for the circle, the reversal gim peg makes the gim peg playback can be fixed again to removing the buckle after the regulation is accomplished, current teaching compasses have been solved if need draw out the circle of certain size on the blackboard, need additionally be equipped with the ruler and measure the volume, it is comparatively inconvenient to use, and the cracked phenomenon of chalk appears easily when drawing, be not convenient for use, influence mr's teaching work's problem.

Drawings

FIG. 1 is a schematic structural diagram of a teaching compass with a chalk for junior middle school mathematics being not easy to break according to a preferred embodiment of the present invention;

FIG. 2 is an enlarged view of the structure shown at A in FIG. 1;

FIG. 3 is a schematic view of the internal structure of the buffer box shown in FIG. 2;

fig. 4 is a partial structural sectional view of the present invention.

Reference numbers in the figures: 1. a suction cup; 2. an adjustment mechanism; 201. moving the buckle; 202. a threaded hole; 203. a fixing bolt; 3. a buffer mechanism; 301. a buffer box; 302. a first spring; 303. moving the plate; 304. a buffer rod; 305. a buffer plate; 4. a connecting rod; 5. a bearing seat; 6. a fixed block; 7. a cross bar; 8. scale lines; 9. a limiting sleeve; 10. a second spring; 11. a limiting groove; 12. pressing a plate; 13. a rubber pad; 14. hanging the plate; 15. and (4) hanging hooks.

Detailed Description

The utility model is further described with reference to the following figures and embodiments.

Please refer to fig. 1, fig. 2, fig. 3 and fig. 4 in combination, wherein fig. 1 is a schematic structural view of a teaching compass, which is provided by the present invention, and is used for mathematics in junior middle schools and is not easy to break with chalk; FIG. 2 is an enlarged view of the structure shown at A in FIG. 1; FIG. 3 is a schematic view of the internal structure of the buffer box shown in FIG. 2; fig. 4 is a partial structural sectional view of the present invention. The teaching compasses comprise a sucker 1, an adjusting mechanism 2 and a buffer mechanism 3, wherein the top of the sucker 1 is fixedly connected with a connecting rod 4, the outer side of the connecting rod 4 is fixedly connected with a bearing seat 5, the top of the bearing seat 5 is fixedly connected with a fixed block 6, the top of the fixed block 6 is rotatably connected with a cross rod 7 through a rotating shaft, and one side of the cross rod 7 is provided with a scale mark 8;

one end of the cross rod 7 is fixedly connected with a hanging plate 14, and one side of the hanging plate 14 is fixedly connected with a hook 15.

It should be noted that: when using this device, can fill in the chalk cover that buffer board 305 bottom set up with the chalk, then inhale sucking disc 1 and confirm centre of a circle position on the blackboard, the setting of bearing frame 5 and connecting rod 4 can make horizontal pole 7 be circular motion around sucking disc 1, drives the chalk removal in the chalk cover of buffer board 305 bottom through horizontal pole 7 and can accomplish the operation of drawing a circle, and the back is accomplished in the teaching, can hang this device through setting up link plate 14 in this device and couple 15 and have outside fixture department to deposit.

Referring to fig. 1 and 4, the adjusting mechanism 2 includes a movable buckle 201, a threaded hole 202 and a fixed bolt 203, the movable buckle 201 is sleeved on the outer side of the cross bar 7, the inner wall of the movable buckle 201 is slidably connected with the outer side of the cross bar 7, the threaded hole 202 is formed in the top of the movable buckle 201, and the fixed bolt 203 is connected with the inner wall of the threaded hole 202 in a threaded manner;

the top of the cross rod 7 is provided with a limit groove 11 matched with the fixed bolt 203 for use, and the outer side of the fixed bolt 203 is in sliding connection with the inner wall of the limit groove 11;

the bottom of the fixing bolt 203 is fixedly connected with a pressing plate 12, and the bottom of the pressing plate 12 is fixedly connected with a rubber pad 13.

It should be noted that: when a circle with a specified size needs to be drawn, the fixing bolt 203 is moved by rotating the fixing bolt 203 to release the fixing of the movable buckle 201, at the moment, a user can adjust the distance between the movable buckle 201 and the sucker 1, the length of the distance is judged by arranging a pointer at the position of the movable buckle 201 to match with the scale mark 8, namely the radius of the circle, after the adjustment is completed, the fixing bolt 203 is reversed to reset the fixing bolt 203, the limiting groove 11 can limit the fixing bolt 203 when the fixing bolt 203 is fixed, the fixing effect is prevented from being influenced by displacement during the fixing process, the pressing plate 12 arranged at the bottom of the fixing bolt 203 can improve the contact area between the bottom of the fixing bolt 203 and the bottom of the inner cavity of the limiting groove 11, so that the fixing effect of the fixing bolt 203 is improved, the rubber pad 13 arranged at the bottom of the pressing plate 12 can improve the friction force between the bottom of the pressing plate 12 and the bottom of the inner cavity of the limiting groove 11, the fixing effect of the fixing peg 203 is further improved.

Referring to fig. 2 and 3, the buffer mechanism 3 includes a buffer box 301, a first spring 302, a moving plate 303, a buffer rod 304 and a buffer plate 305, the top of the buffer box 301 is fixedly connected with the bottom of the movable buckle 201, the first spring 302 is welded on the top of the inner cavity of the buffer box 301, the moving plate 303 is welded on one end of the first spring 302, the buffer rods 304 are fixedly connected to four corners of the bottom of the moving plate 303, the buffer plate 305 is fixedly connected to the bottom of the buffer rod 304, and the outer side of the moving plate 303 is slidably connected with the inner wall of the buffer box 301;

the outer side of the buffer rod 304 is sleeved with a limiting sleeve 9, and the bottom of the limiting sleeve 9 is fixedly connected with the bottom of the inner cavity of the buffer box 301;

the outside of the buffer rod 304 is sleeved with a second spring 10, and one end of the second spring 10 is welded with the top of the buffer plate 305.

It should be noted that: the chalk in the chalk sleeve at the bottom of the buffer plate 305 is not rigidly connected with the movable buckle 201 through the matching of all the parts in the buffer mechanism 3, if the chalk is blocked in the process of drawing a circle, the chalk sleeve can be driven to extrude the buffer plate 305, the buffer plate 305 can extrude the buffer rod 304 under the stress, the buffer rod 304 can move to extrude the movable plate 303 under the stress, the movable plate 303 can extrude the first spring 302 under the stress, the first spring 302 can deform to absorb and offset the stress when the chalk is blocked, the chalk can be protected when the buffer plate 305 moves, the second spring 10 can be synchronously driven to move when the buffer plate 305 moves, the top of the second spring 10 can be extruded at the bottom of the buffer box 301 when the second spring 10 moves, the second spring 10 can deform to absorb and offset the stress, the buffer effect of the device is further improved, the limit sleeve 9 is arranged outside the buffer rod 304 to limit the moving chalk rod 304, the buffer rod 304 is prevented from deviating from the motion track when moving, and the stability of the buffer rod 304 when moving is improved.

The teaching compasses provided by the utility model have the following working principle that chalk for junior middle school mathematics is not easy to break:

when the device is used, chalk can be plugged into a chalk sleeve arranged at the bottom of the buffer plate 305, then the sucker 1 is sucked on a blackboard to determine the position of a circle center, the bearing seat 5 and the connecting rod 4 are arranged to enable the cross rod 7 to do circular motion around the sucker 1, the chalk in the chalk sleeve at the bottom of the buffer plate 305 is driven to move through the cross rod 7 to finish circle drawing operation, if the chalk is in obstruction in the circle drawing process, the chalk sleeve is driven to extrude the buffer plate 305, the buffer plate 305 is stressed to extrude the buffer rod 304, the buffer rod 304 is stressed to move to extrude the movable plate 303, the movable plate 303 is stressed to extrude the first spring 302, the first spring 302 is stressed to deform and absorb to counteract the stress, so that the chalk is protected when the chalk is in obstruction, the chalk is prevented from being broken, when a circle with a specified size needs to be drawn, the fixing bolt 203 is rotated to move to release the fixation of the movable buckle 201, the user can adjust the distance between removal buckle 201 and the sucking disc 1 this moment, sets up the pointer through removal buckle 201 department and cooperates scale mark 8 to judge the length of this distance, is the radius of circle promptly, and the regulation is accomplished the back and is reversed gim peg 203 and make gim peg 203 playback can be fixed again to removing buckle 201.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. The utility model provides a teaching compasses that junior middle school mathematics is difficult for fracture with chalk, a serial communication port, including sucking disc (1), adjustment mechanism (2) and buffer gear (3), top fixedly connected with connecting rod (4) of sucking disc (1), outside fixedly connected with bearing frame (5) of connecting rod (4), top fixedly connected with fixed block (6) of bearing frame (5), the top of fixed block (6) is rotated through the pivot and is connected with horizontal pole (7), one side of horizontal pole (7) is provided with scale mark (8).

2. The teaching compasses for the chalk used for junior high school mathematics as claimed in claim 1, wherein said adjusting mechanism (2) comprises a moving buckle (201), a threaded hole (202) and a fixed bolt (203), said moving buckle (201) is sleeved on the outer side of the cross bar (7), the inner wall of said moving buckle (201) is slidably connected with the outer side of the cross bar (7), the top of said moving buckle (201) is provided with a threaded hole (202), and the inner wall of said threaded hole (202) is connected with a fixed bolt (203) by screw thread.

3. The teaching compasses capable of preventing chalk from being broken easily for junior high school mathematics as claimed in claim 2, wherein said buffer mechanism (3) comprises a buffer box (301), a first spring (302), a moving plate (303), a buffer rod (304) and a buffer plate (305), the top of said buffer box (301) is fixedly connected with the bottom of said moving buckle (201), said first spring (302) is welded on the top of the inner cavity of said buffer box (301), said moving plate (303) is welded on one end of said first spring (302), said buffer rods (304) are fixedly connected with the four corners of the bottom of said moving plate (303), said buffer plate (305) is fixedly connected with the bottom of said buffer rod (304), and the outer side of said buffer rod (303) is connected with the inner wall of said moving plate (301) in a sliding manner.

4. The teaching compasses for the mathematics in junior middle school use chalk difficult to break as claimed in claim 3, wherein the outside of said buffer rod (304) is sleeved with a limit sleeve (9), the bottom of said limit sleeve (9) is fixedly connected with the bottom of the inner cavity of the buffer box (301).

5. The teaching compass capable of preventing chalk from being broken easily for junior middle school mathematics as claimed in claim 3, wherein a second spring (10) is sleeved on the outer side of the buffer rod (304), and one end of the second spring (10) is welded with the top of the buffer plate (305).

6. The teaching compasses for the chalk used for junior high school mathematics as claimed in claim 2, wherein the top of said cross bar (7) is equipped with a limit groove (11) matched with a fixing bolt (203), the outer side of said fixing bolt (203) is connected with the inner wall of the limit groove (11) in a sliding way.

7. The teaching compass with chalk hard to break for junior middle school mathematics as claimed in claim 2, wherein the bottom of the fixing bolt (203) is fixedly connected with a pressing plate (12), and the bottom of the pressing plate (12) is fixedly connected with a rubber pad (13).

8. The teaching compasses for the junior middle school mathematics with the chalk difficult to break according to claim 1, characterized in that one end of the cross bar (7) is fixedly connected with a hanging plate (14), and one side of the hanging plate (14) is fixedly connected with a hook (15).