CN214822195U

CN214822195U - Compasses are used to mathematics teaching aid convenient to adjust

Info

Publication number: CN214822195U
Application number: CN202120000411.6U
Authority: CN
Inventors: 刘天懿; 韩建霞
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-01-02
Filing date: 2021-01-02
Publication date: 2021-11-23
Anticipated expiration: 2031-01-02

Abstract

The utility model discloses a compasses for mathematical teaching aid convenient to adjust, including two rotor plates, two the rotor plate sets up, two for left right direction the rotor plate is close to one side lateral wall mutually and has all seted up the cambered surface groove, is located left side cambered surface groove and is close to back wall department and is located right side cambered surface groove and is close to the equal fixedly connected with circular block of antetheca department, two be provided with the rotation axis between the circular block, the rotation axis front and back end all through the bearing with be located two circular block swing joint of front and back side, is located the left side the rotor plate antetheca is close to top department and has the limiting plate through pivot and bearing swing joint. The utility model discloses a series of structures make this device have the clamp and get characteristics such as convenient and service function is many.

Description

Compasses are used to mathematics teaching aid convenient to adjust

Technical Field

The utility model relates to a mathematics teaching aid technical field specifically is a compasses for mathematics teaching aid convenient to adjust.

Background

In the teaching in present classroom, the compasses are a teaching aid commonly used, especially on mathematics classroom, it is mainly used for supplying the teacher to draw the circle on the blackboard, replace the manual circle of drawing of teacher, the effect is guaranteed, but prior art's compasses for mathematical teaching aid have the chalk clamp to get inconvenient and service function singleness scheduling problem when using, thereby lead to the teacher to need to carry too much teaching aid in the classroom, and portable not, therefore we provide a compasses for mathematical teaching aid convenient to adjust.

Disclosure of Invention

The utility model provides a technical problem lie in overcoming prior art's chalk clamp and getting inconvenient and the single class defect of service function, provide a compasses for mathematical teaching aid convenient to adjust. A compasses for mathematical teaching aid convenient to adjust has the chalk clamp and gets characteristics such as convenient and service function is many.

In order to achieve the above object, the utility model provides a following technical scheme: a pair of compasses for a mathematic teaching aid convenient to adjust comprises two rotating plates which are arranged in the left-right direction, cambered grooves are respectively formed in the two rotating plates and close to the side wall of one side, circular blocks are fixedly connected to the positions, close to the rear wall, of the cambered grooves in the left side and the positions, close to the front wall, of the cambered grooves in the right side, a rotating shaft is arranged between the two circular blocks, the front end and the rear end of the rotating shaft are movably connected with two round blocks positioned at the front side and the rear side through bearings, a limit plate is movably connected at the position, close to the upper part, of the front wall of the rotating plate positioned at the left side through the rotating shaft and the bearings, the limiting plate rear wall is close to the bottom and is movably connected with the rotating plate front wall on the right side, the rotating plate bottom is movably connected with a moving shaft, the bottom end of the moving shaft on the left side is fixedly connected with a plurality of spring pieces which are uniformly distributed, and the bottom end of the moving shaft on the right side is fixedly connected with a conical block.

Preferably, the limiting plate rear side is close to bottom department and is provided with the pipe, the pipe front end runs through the limiting plate back wall, is located the right side the rotor plate antetheca seted up with pipe assorted shifting chute, be provided with first ring in the shifting chute, the pipe rear end passes through bearing and first ring inner wall swing joint, the shifting chute left and right sides inner wall all seted up with first ring assorted first spout, be provided with the threaded rod in the pipe, just the pipe inner wall seted up with threaded rod assorted screw thread, the threaded rod right-hand member extends to in the shifting chute to there is the movable block through bearing swing joint, the first friction pad of movable block right side lateral wall fixedly connected with.

Preferably, the blind hole matched with the moving shaft is formed in the bottom of the rotating plate, the top end of the moving shaft extends into the blind hole, a slide bar is fixedly connected to the position, close to the top end, of the side wall of the left side and the right side of the moving shaft, a second slide groove matched with the slide bar is formed in the inner wall of the left side and the right side of the blind hole, a groove is formed in the position, close to the bottom, of the front wall of the rotating plate, a fixed block is arranged in the groove, a bolt rod is fixedly connected to the rear wall of the fixed block, a through hole matched with the bolt rod is formed in the inner wall of the rear side of the groove, the bolt rod penetrates through the through hole and extends into the blind hole, a plurality of jacks uniformly distributed in the front wall of the moving shaft and matched with the bolt rod are formed in the front wall of the bolt rod, and a spring is sleeved on the front end of the bolt rod, and the front end and the rear end of the spring are fixedly connected with the rear wall of the fixed block and the inner wall of the front side and rear side of the groove respectively.

Preferably, a plurality of the spring leaf overcoat is equipped with the second ring, just second ring inner wall and spring leaf are close to second ring one side lateral wall and set up the screw thread that matches each other, the spring leaf is kept away from second ring one side lateral wall fixedly connected with second friction pad, the spring leaf is close to second ring one side lateral wall and is close to the equal fixedly connected with arc piece in bottom department, is located the left side the removal axle left and right sides lateral wall is close to the equal fixedly connected with fixture block in bottom department.

Preferably, the threaded rod left end extends to the limiting plate left side to the rotatory piece of fixedly connected with, fixed block left side lateral wall fixedly connected with U-shaped pole.

Preferably, scales are respectively marked at the positions of the front walls of the two rotating plates far away from one side

Preferably, the front end of the rotating shaft penetrates through the bearing inner ring to extend to the front of the circular block, the pointer is fixedly connected with the front end of the rotating shaft, and scales matched with the pointer are carved on the front wall of the circular block located in the front.

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

1. when this technical scheme uses, through mutually supporting between limiting plate, circular block, rotation axis and the pipe, can realize will adjusting the angle between two rotor plates to draw the circle, and when two rotor plates become a straight line, can regard as the ruler to use, rethread pointer and the scale that is located on the front side circular block can be adjusted accurately to the contained angle between two rotor plates, thereby can make the contained angle straight line that the compasses drawn accurate angle.

2. In the technical scheme, the second circular ring is matched with the spring piece, so that the spring piece can clamp the chalk, the spring piece can clamp the chalk in a rotating mode through the second circular ring, and the second friction pad can prevent the chalk from sliding off and being broken.

Drawings

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

Fig. 2 is a right side view of the present invention.

Fig. 3 is an enlarged view of a portion a in fig. 1.

Fig. 4 is an enlarged view of fig. 2 at B.

Fig. 5 is an enlarged view of fig. 2 at C.

Reference numbers in the figures: 1. a rotating plate; 2. a limiting plate; 3. a circular block; 4. a pointer; 5. a conical block; 6. a clamping block; 7. a second friction pad; 8. a spring plate; 9. an arc-shaped block; 10. a second circular ring; 11. a movable shaft; 12. a rotating shaft; 13. a latch rod; 14. a fixed block; 15. a U-shaped rod; 16. a first circular ring; 17. a moving block; 18. a first friction pad; 19. a circular tube; 20. a threaded rod; 21. the block is rotated.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-5, the present invention provides a technical solution: a compasses convenient to adjust for mathematics teaching aid comprises two rotating plates 1, the two rotating plates 1 are arranged in the left-right direction, scales are respectively carved on the positions of the front walls of the two rotating plates 1 far away from one side, arc grooves are respectively formed on the two rotating plates 1 close to the side wall of one side, circular blocks 3 are fixedly connected at the positions of the left arc groove close to the rear wall and the positions of the right arc groove close to the front wall, a rotating shaft 12 is arranged between the two circular blocks 3, the front end and the rear end of the rotating shaft 12 are movably connected with the two circular blocks 3 at the front side and the rear side through bearings, the front end of the rotating shaft 12 passes through an inner ring of the bearing and extends to the front of the circular blocks 3 and is fixedly connected with a pointer 4, scales matched with the pointer 4 are carved on the front wall of the circular block 3 at the front side, a limiting plate 2 is movably connected with the front wall of the left rotating plate 1 through the rotating shaft and the bearing, the position of the rear wall of the limiting plate 2 close to the bottom is movably connected with the rotating plate 1 at the right side, a round tube 19 is arranged at the rear side of the limit plate 2 close to the bottom, the front end of the round tube 19 penetrates through the rear wall of the limit plate 2, a moving groove matched with the round tube 19 is formed in the front wall of the rotating plate 1 at the right side, a first circular ring 16 is arranged in the moving groove, the rear end of the round tube 19 is movably connected with the inner wall of the first circular ring 16 through a bearing, first sliding grooves matched with the first circular ring 16 are formed in the inner walls at the left side and the right side of the moving groove, a threaded rod 20 is arranged in the round tube 19, threads matched with the threaded rod 20 are formed in the inner wall of the round tube 19, the right end of the threaded rod 20 extends into the moving groove, a moving block 17 is movably connected through the bearing, a first friction pad 18 is fixedly connected to the right side wall of the moving block 17, the limit plate 2 can deflect along with the change of the included angle of the two rotating plates 1, the limit plate 2 can be fixed through the first friction pad 18, and further the fixed included angle between the two rotating plates 1 is ensured, the angle between the two rotating plates 1 can be adjusted through the mutual matching of the limiting plate 2, the circular block 3, the rotating shaft 12 and the circular tube 19, so that a circle can be drawn, when the two rotating plates 1 are in a straight line, the straight line can be used as a ruler, the included angle between the two rotating plates 1 can be accurately adjusted through the pointer 4 and the scale on the circular block 3 at the front side, so that the compasses can draw the straight line with the included angle with the accurate angle, the left end of the threaded rod 20 extends to the left side of the limiting plate 2 and is fixedly connected with the rotating block 21, the bottom of the rotating plate 1 is movably connected with the moving shaft 11, the bottom of the rotating plate 1 is provided with a blind hole matched with the moving shaft 11, the top end of the moving shaft 11 extends into the blind hole, the side walls at the left side and the right side of the moving shaft 11 are fixedly connected with sliding rods near the top ends, and the inner walls at the left side and the right side of the blind hole are provided with second sliding grooves matched with the sliding rods, a groove is arranged on the front wall of the rotating plate 1 near the bottom, a fixed block 14 is arranged in the groove, a bolt rod 13 is fixedly connected with the rear wall of the fixed block 14, a through hole matched with the bolt rod 13 is arranged on the inner wall of the rear side of the groove, the bolt rod 13 passes through the through hole and extends into the blind hole, a plurality of jacks which are uniformly distributed and matched with the bolt rod 13 are arranged on the front wall of the moving shaft 11, a spring is sleeved on the bolt rod 13 near the front end, the front end and the rear end of the spring are respectively fixedly connected with the rear wall of the fixed block 14 and the inner wall of the front side and the rear side of the groove, the position of the moving shaft 11 in the blind hole can be adjusted and fixed, a U-shaped rod 15 is fixedly connected with the left side wall of the fixed block 14, a plurality of spring pieces 8 which are uniformly distributed are fixedly connected with the bottom end of the moving shaft 11 on the left side, a second circular ring 10 is sleeved outside a plurality of spring pieces 8, and the side walls of the second circular ring 10 and the spring pieces 8 near the second circular ring 10 are provided with threads which are matched with each other, spring leaf 8 keeps away from second ring 10 one side lateral wall fixedly connected with second friction pad 7, spring leaf 8 is close to second ring 10 one side lateral wall and is close to the equal fixedly connected with arc piece 9 of bottom department, it is close to the equal fixedly connected with fixture block 6 of bottom department to be located the left side and remove the axle 11 left and right sides lateral wall, it presss from both sides the chalk to draw in a plurality of spring leaf 8 to the centre through second ring 10 realization, through mutually supporting between second ring 10 and the spring leaf 8, can realize carrying the chalk through spring leaf 8, and make spring leaf 8 press from both sides the chalk through the rotation of second ring 10, and prevent the chalk landing and prevent that the chalk is cracked through second friction pad 7, it moves axle 11 bottom fixedly connected with conical block 5 to be located the right side.

The working principle is as follows: when the technical scheme is used, firstly, chalk is placed between a plurality of spring plates 8, the second ring 10 is rotated, the spring plates 8 contract inwards to clamp the chalk, when a circle needs to be drawn, the rotating block 21 is rotated to drive the threaded rod 20 to rotate, the threaded rod 20 moves forwards and drives the moving block 17 and the first friction pad 18 to move forwards, the rear wall of the first friction pad 18 is separated from the inner wall of the rear side of the moving groove, the included angle between the two rotating plates 1 is manually adjusted, the rear wall of the first friction pad 18 is tightly attached to the inner wall of the rear side of the moving groove when the rotating block 21 is rotated reversely, the two rotating plates 1 are fixed, the circle can be drawn at the moment, when a straight line with a fixed included angle is needed, the pointer 4 is observed only when the included angle between the two rotating plates 1 is adjusted to fix the included angle between the two rotating plates 1, when the two rotating plates 1 are adjusted to be a straight line, the compasses can be used as a straight ruler, the user also can stimulate U-shaped pole 15 and drive fixed block 14 forward motion, and fixed block 14 drives the bolt pole 13 rear end and breaks away from the jack, readjusts the position of removal axle 11 in the blind hole, releases U-shaped pole 15, and bolt pole 13 rear end is pegged graft in the jack of neighbouring under the spring action, fixes removal axle 11, and the circle of drawing scope of compasses this moment is wider.

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 invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a compasses for mathematical teaching aid convenient to adjust, includes two rotor plates (1), its characterized in that: the two rotating plates (1) are arranged in the left-right direction, arc grooves are formed in the two rotating plates (1) close to the side wall of one side, arc grooves are formed in the left side arc grooves close to the rear wall and are fixedly connected with round blocks (3) in the right side arc grooves close to the front wall, a rotating shaft (12) is arranged between the two round blocks (3), the front end and the rear end of the rotating shaft (12) are movably connected with the two round blocks (3) in the front side and the rear side through bearings, a limiting plate (2) is movably connected with the front wall of the right side rotating plate (1) through a rotating shaft and a bearing in the position close to the upper part of the front wall of the left side rotating plate (1), the rear wall of the limiting plate (2) is movably connected with the front wall of the right side rotating plate (1) through the bottom, a moving shaft (11) is movably connected with the bottom of the moving shaft (11) in the left side, and a plurality of uniformly distributed spring pieces (8) are fixedly connected with the bottom of the moving shaft (11), the bottom end of the moving shaft (11) positioned at the right side is fixedly connected with a conical block (5).

2. The compasses convenient to adjust for mathematics teaching aid of claim 1, characterized in that: a round pipe (19) is arranged at the rear side of the limit plate (2) close to the bottom, the front end of the round pipe (19) penetrates through the rear wall of the limit plate (2), a moving groove matched with the round pipe (19) is formed in the front wall of the rotating plate (1) at the right side, a first circular ring (16) is arranged in the moving groove, the rear end of the circular tube (19) is movably connected with the inner wall of the first circular ring (16) through a bearing, the inner walls of the left side and the right side of the moving groove are both provided with a first sliding groove matched with a first circular ring (16), a threaded rod (20) is arranged in the circular tube (19), and the inner wall of the round tube (19) is provided with threads matched with the threaded rod (20), the right end of the threaded rod (20) extends into the moving groove, and a moving block (17) is movably connected with the bearing, and a first friction pad (18) is fixedly connected with the right side wall of the moving block (17).

3. The compasses convenient to adjust for mathematics teaching aid of claim 1, characterized in that: the bottom of the rotating plate (1) is provided with a blind hole matched with the moving shaft (11), the top end of the moving shaft (11) extends into the blind hole, the side walls of the left side and the right side of the moving shaft (11) are fixedly connected with slide bars at positions close to the top end, the inner walls of the left side and the right side of the blind hole are provided with second slide grooves matched with the slide bars, the front wall of the rotating plate (1) is provided with a groove at positions close to the bottom, a fixed block (14) is arranged in the groove, the rear wall of the fixed block (14) is fixedly connected with a bolt rod (13), the inner wall of the rear side of the groove is provided with a through hole matched with the bolt rod (13), the bolt rod (13) penetrates through the through hole and extends into the blind hole, the front wall of the moving shaft (11) is provided with a plurality of uniformly distributed inserting holes matched with the bolt rod (13), and a spring is sleeved on the bolt rod (13) close to the front end, and the front end and the rear end of the spring are respectively fixedly connected with the rear wall of the fixing block (14) and the inner walls of the front side and the rear side of the groove, and the side wall of the left side of the fixing block (14) is fixedly connected with a U-shaped rod (15).

4. The compasses convenient to adjust for mathematics teaching aid of claim 1, characterized in that: a plurality of spring leaf (8) overcoat is equipped with second ring (10), just second ring (10) inner wall and spring leaf (8) are close to second ring (10) one side lateral wall and set up the screw thread that matches each other, second ring (10) one side lateral wall fixedly connected with second friction pad (7) are kept away from in spring leaf (8), spring leaf (8) are close to second ring (10) one side lateral wall and are close to equal fixedly connected with arc piece (9) of bottom department, are located the left side it is close to equal fixedly connected with fixture block (6) of bottom department to remove axle (11) left and right sides lateral wall.

5. The compasses convenient to adjust for mathematics teaching aid of claim 2, characterized in that: the left end of the threaded rod (20) extends to the left side of the limiting plate (2) and is fixedly connected with a rotating block (21).

6. The compasses convenient to adjust for mathematics teaching aid of claim 1, characterized in that: scales are marked on the positions, far away from one side, of the front walls of the two rotating plates (1).

7. The compasses convenient to adjust for mathematics teaching aid of claim 1, characterized in that: the front end of the rotating shaft (12) penetrates through the bearing inner ring to extend to the front of the circular block (3), the pointer (4) is fixedly connected to the front end of the rotating shaft, and scales matched with the pointer (4) are carved on the front wall of the circular block (3) located in the front.