CN210706645U

CN210706645U - Multifunctional protractor

Info

Publication number: CN210706645U
Application number: CN201920443310.9U
Authority: CN
Inventors: 刘云霄; 张丽媛
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-04-03
Filing date: 2019-04-03
Publication date: 2020-06-09
Anticipated expiration: 2029-04-03

Abstract

The utility model discloses a multifunctional protractor, including semicircle pole and straight-bar, the both ends of semicircle pole and the both ends fixed connection of straight-bar, the mid point department of straight-bar rotates the one end that is connected with the dwang, and the other end fixedly connected with pointer of dwang, the fixed limiting plate that has cup jointed of dwang, sets up two first rectangular shape through-holes about mid point symmetry setting on the straight-bar, the utility model discloses simple structure can angle of measurement, measures length, and conveniently draws out the line end of different angles, uses when being convenient for teaching in class, need not to carry multiple instrument, has improved teaching efficiency.

Description

Multifunctional protractor

Technical Field

The utility model relates to a mathematical education equipment especially relates to a multi-functional protractor.

Background

In the process of mathematical education, often need to use multiple equipment, like protractor, ruler etc. often need carry multiple instrument and just can accomplish the teaching smoothly, if the line segment of two specific angles of needs roll-off, need earlier with a ruler roll-off line, trade the protractor again and carry out the punctuation, trade the ruler again afterwards and draw the straight line. The operation is complicated, the equipment needs to be frequently replaced, the use is inconvenient, and the teaching quality is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the defects existing in the prior art and providing a multifunctional protractor.

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

a multifunctional protractor comprises a semicircular rod and a straight rod, wherein two ends of the semicircular rod are fixedly connected with two ends of the straight rod, the middle point of the straight rod is rotatably connected with one end of a rotating rod, the other end of the rotating rod is fixedly connected with a pointer, a limiting plate is fixedly sleeved on the rotating rod, two first elongated through holes symmetrically arranged about the middle point are formed in the straight rod, a second elongated through hole is formed in the rotating rod, the first elongated through hole and the second elongated through hole are movably sleeved with a sliding block, a slot is formed in the sliding block, a third elongated through hole penetrating through the slot is formed in the side wall of the sliding block, a fixing rod is movably inserted in the slot, a pressing plate is fixedly connected to one end, located outside the sliding block, of the fixing rod, the pressing plate is connected to the outer side wall of the, the end face, far away from the pressing plate, of the fixing rod is provided with a fixing groove, chalk is movably inserted into the fixing groove, the side wall of the fixing groove is provided with a sliding hole, a fixing plate is connected in the sliding hole in a sliding mode, a threaded rod is fixedly connected with the fixing plate, a sliding strip is sleeved on the threaded rod in a threaded mode, and the sliding strip is connected with a third long-strip-shaped through hole in a sliding mode.

Preferably, the sliding strip and the third elongated through hole are both in a quadrangular structure.

Preferably, the rear wall of the semicircular rod is fixedly connected with a permanent magnet sheet.

Preferably, the length of the slot is larger than that of the chalk.

Preferably, semicircle pole, straight-bar and dwang are the transparent plastic material, and the antetheca of semicircle pole, straight-bar and dwang has all seted up the scale.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses simple structure can angle of measurement, measures length, and conveniently draws out the line end of different angles, uses when being convenient for to give lessons teaching, need not to carry multiple instrument, has improved teaching efficiency.

Drawings

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

fig. 2 is a sectional view a-a.

In the figure: the chalk comprises a semicircular rod 1, a straight rod 2, a rotating rod 3, a pointer 4, a limiting plate 5, a sliding block 6, a fixing rod 7, a pressing plate 8, a spring 9, chalk 10, a fixing plate 11, a threaded rod 12 and a sliding strip 13.

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.

Referring to fig. 1-2, a multifunctional protractor comprises a semi-circular rod 1 and a straight rod 2, wherein two ends of the semi-circular rod 1 are fixedly connected with two ends of the straight rod 2, the middle point of the straight rod 2 is rotatably connected with one end of a rotating rod 3, the other end of the rotating rod 3 is fixedly connected with a pointer 4, the rotating rod 3 is fixedly sleeved with a limiting plate 5, the straight rod 2 is provided with two first elongated through holes symmetrically arranged about the middle point, the rotating rod 3 is provided with a second elongated through hole, the first elongated through hole and the second elongated through hole are movably sleeved with a sliding block 6, the sliding block 6 is provided with a slot, the side wall of the sliding block 6 is provided with a third elongated through hole penetrating through the slot, the slot is movably inserted with a fixing rod 7, one end of the fixing rod 7 positioned outside the sliding block 6 is fixedly connected with a pressing plate 8, the fixed slot has been seted up to the terminal surface that clamp plate 8 was kept away from to dead lever 7, the chalk 10 has been pegged graft in the fixed slot activity, the slip hole has been seted up to the lateral wall of fixed slot, sliding connection has fixed plate 11 in the slip hole, 11 fixedly connected with threaded rods 12 of fixed plate, threaded rod 12 screw thread has cup jointed slider 13, slider 13 and the rectangular shape through-hole sliding connection of third, slider 13 is the quadrangular prism structure with the rectangular shape through-hole of third, prevent to take place to rotate, semicircle pole 1's back wall fixedly connected with permanent magnet piece, be convenient for adsorb on the blackboard, the length of slot is greater than the length of chalk 10, be convenient for accomodating of chalk 10, semicircle pole 1, straight-bar 2 and dwang 3 are the transparent plastic material, and semicircle pole 1.

The working principle is as follows: the chalk 10 is fixed through the adjusting threaded rod 12, the rotating rod 3 is rotated, the pressing plate 8 is pressed down, and then the sliding block 6 on the semi-circular rod 1 and one of the sliding blocks 6 on the straight rod 2 are respectively pulled, so that the scribing can be completed.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. The utility model provides a multifunctional protractor, includes semicircle pole (1) and straight-bar (2), its characterized in that, the both ends of semicircle pole (1) and the both ends fixed connection of straight-bar (2), the mid point department of straight-bar (2) rotates the one end that is connected with dwang (3), the other end fixedly connected with pointer (4) of dwang (3), dwang (3) are fixed to have cup jointed limiting plate (5), set up two first rectangular shape through-holes about the mid point symmetry setting on straight-bar (2), set up the rectangular shape through-hole of second on dwang (3), slider (6) has been cup jointed in the activity of the rectangular shape through-hole of first rectangular shape and the rectangular shape through-hole of second, set up the slot on slider (6), the rectangular shape through-hole of third that link up the slot is seted up to the lateral wall of slider (6), the slot activity is peg, dead lever (7) are located outside one end fixedly connected with clamp plate (8) of slider (6), clamp plate (8) are connected on the lateral wall of slider (6) through spring (9), spring (9) activity cup joints on dead lever (7), the fixed slot has been seted up to the terminal surface that clamp plate (8) were kept away from in dead lever (7), the fixed slot activity is pegged graft and is had chalk (10), the slip hole has been seted up to the lateral wall of fixed slot, sliding connection has fixed plate (11) in the slip hole, fixed plate (11) fixedly connected with threaded rod (12), sliding strip (13) have been cup jointed to threaded rod (12) screw thread, sliding strip (13) and the rectangular shape through-hole sliding connection of third.

2. The multifunctional angle gauge according to claim 1, wherein the sliding strip (13) and the third elongated through hole are both in a quadrangular prism structure.

3. The multifunctional protractor of claim 1, wherein the rear wall of the semi-circular rod (1) is fixedly connected with a permanent magnet sheet.

4. A multi-purpose protractor as claimed in claim 1, characterized in that the length of the slot is greater than the length of the chalk (10).

5. The multifunctional protractor according to claim 1, wherein the semicircular rod (1), the straight rod (2) and the rotating rod (3) are all made of transparent plastic, and the front walls of the semicircular rod (1), the straight rod (2) and the rotating rod (3) are all provided with scales.