CN212046609U

CN212046609U - Teaching marking ruler

Info

Publication number: CN212046609U
Application number: CN202020555460.1U
Authority: CN
Inventors: 胡兆欣
Original assignee: Guilin Normal College
Current assignee: Guilin Normal College
Priority date: 2020-04-15
Filing date: 2020-04-15
Publication date: 2020-12-01
Anticipated expiration: 2030-04-15

Abstract

The utility model relates to the technical field of education, and a teaching marking off chi is disclosed, including set square, pivot and connecting rod, first recess has been seted up to the inside of set square, the second recess has been seted up to the inside upper and lower surface symmetry of first recess, the both ends of pivot set up respectively in the inside of corresponding second recess and rotate with the second recess that corresponds respectively and be connected, the through-hole has been seted up to the inside of connecting rod and cup joints with the outer wall of pivot is fixed, the upper end pole wall fixedly connected with protractor of connecting rod, the protractor rotates with first recess to be connected, the cavity has been seted up to the inside of pivot, the inside of cavity sets up in stop gear. The utility model discloses convenient operation can carry protractor and set square simultaneously, has improved the result of use.

Description

Teaching marking ruler

Technical Field

The utility model relates to an education technique field especially relates to a teaching marking off chi.

Background

Mathematics is a science for researching real world space form and quantity relationship, is widely applied in scientific development and modern life production, is in the transition stage of high school mathematics and plays an irreplaceable role in learning other disciplines.

The current teaching marking off chi uses separately usually, and the problem that leads to like this is often need to carry two teaching rulers at mr teaching in-process, and it is comparatively inconvenient to carry the process, and need change teaching ruler when measuring the angle and drawing the straight line, and is comparatively loaded down with trivial details.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving prior art protractor and triangle-shaped chi and separately using, when both need use simultaneously, the mr need carry two kinds of teaching rulers, carries comparatively inconvenient problem, and a teaching marking off rule that proposes.

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

the utility model provides a teaching marking off chi, includes set square, pivot and connecting rod, first recess has been seted up to the inside of set square, the second recess has been seted up to the inside upper and lower surface symmetry of first recess, the both ends of pivot set up respectively in the inside of corresponding second recess and rotate with the second recess that corresponds respectively and be connected, the through-hole has been seted up in the inside of connecting rod and cup joints with the outer wall of pivot is fixed, the upper end pole wall fixedly connected with protractor of connecting rod, protractor and first recess rotate and are connected, the cavity has been seted up to the inside of pivot, the inside of cavity sets up in stop gear.

Preferably, stop gear includes spring, gag lever post and stopper, the spring is fixed to be set up in the inside of cavity and upper end and stopper fixed connection, the third recess has been seted up to the upside of cavity, third recess and stopper phase-match, spacing hole has been seted up to the upper surface of cavity, gag lever post and spacing hole phase-match.

Preferably, the groove bottom of the second groove on the upper side is provided with a through hole, and the limiting rod respectively passes through the limiting hole and the through hole and extends upwards and is fixedly connected with a pressing block.

Preferably, the cross sections of the limiting block and the limiting rod are rectangular.

Preferably, a rubber pad is fixedly arranged at the edge of the bottom surface of the triangular ruler.

Preferably, the upper surface of the triangular ruler is fixedly provided with a grabbing rod.

Compared with the prior art, the utility model provides a teaching marking off chi possesses following beneficial effect:

1. this teaching marking off chi through seting up in the inside first recess of set square, can place the protractor in the inside of first recess when need not using the protractor, avoids influencing the normal use of set square.

2. This teaching marking off chi through setting up in the inside stop gear of cavity, can carry on spacingly to the axis pin when using or not using the protractor, avoids the protractor to rotate at will, influences the result of use.

The part that does not relate to in the device all is the same with prior art or can adopt prior art to realize, the utility model discloses convenient operation can carry protractor and set square simultaneously, has improved the result of use.

Drawings

Fig. 1 is a schematic structural view of a teaching marking ruler provided by the present invention;

FIG. 2 is a schematic cross-sectional view of the triangular ruler of FIG. 1;

FIG. 3 is an enlarged view of a portion A of FIG. 2;

fig. 4 is a schematic sectional structural view of the limiting mechanism in fig. 2.

Fig. 5 is a schematic view of the reverse structure of the triangular ruler in fig. 1.

In the figure: the device comprises a set square 1, a shaft pin 2, a connecting rod 3, a protractor 4, a spring 5, a limiting rod 6, a limiting block 7, a pressing block 8, a rubber pad 9 and a grabbing rod 10.

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.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Referring to fig. 1-5, a teaching marking off chi, including set square 1, pivot 2 and connecting rod 3, first recess has been seted up to set square 1's inside, the second recess has been seted up to the inside upper and lower surface symmetry of first recess, the both ends of pivot 2 set up respectively in the inside of the second recess that corresponds and rotate with the second recess that corresponds respectively and be connected, the through-hole has been seted up in connecting rod 3's inside and the outer wall of pivot 2 is fixed cup joints, the last terminal bar wall fixedly connected with protractor 4 of connecting rod 3, protractor 4 rotates with first recess and is connected, the cavity has been seted up to pivot 2's inside, the inside of cavity sets up in stop gear.

Stop gear includes spring 5, gag lever post 6 and stopper 7, and spring 5 is fixed to be set up in the inside of cavity and upper end and stopper 7 fixed connection, and the third recess has been seted up to the upside of cavity, and third recess and stopper 7 phase-match, spacing hole has been seted up to the upper surface of cavity, rotates between gag lever post 6 and the spacing hole and is connected.

The through-hole has been seted up to the tank bottom of upside second recess, and the cross-section of this through-hole is the rectangle, and gag lever post 6 is respectively through spacing hole and through-hole and upwards extend and fixedly connected with briquetting 8, is convenient for extrude gag lever post 6 through briquetting 8.

The cross sections of the limiting block 7 and the limiting rod 6 are all set to be rectangular, and the limiting rod 6 is prevented from rotating.

The rubber pad 9 is fixedly arranged at the edge of the bottom surface of the triangular ruler 1, so that the noise generated when the triangular ruler 1 collides with a blackboard is reduced.

The upper surface of the set square 1 is fixedly provided with a grabbing rod 10, so that the set square 1 or the protractor 4 can be grabbed conveniently when being used.

The utility model discloses in, during the use, snatch set square 1 through grabbing pole 10, be convenient for remove the position of set square 1, when needs use set square 1, press down briquetting 8, briquetting 8 extrudees gag lever post 6, gag lever post 6 extrudees stopper 7, stopper 7 gets into the inside of cavity and extrudees spring 5, rock set square 1 after stopper 7 gets into the inside of cavity, loosen briquetting 8 after the inside of first recess is rotated out to protractor 4 inside first recess, loosen behind briquetting 8, spring 5 extrudees stopper 7 upward movement through self elasticity, stopper 7 drives 6 upward movement of gag lever post, it is spacing to pivot 2 through stopper 7 and gag lever post 6 after the inside of stopper 7 entering third recess, avoid pivot 2 to continue to rotate, make protractor 4's position remain stable.

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 teaching marking off chi, includes set square (1), pivot (2) and connecting rod (3), its characterized in that, first recess has been seted up to the inside of set square (1), the second recess has been seted up to the inside upper and lower surface symmetry of first recess, the both ends of pivot (2) set up respectively in the inside of corresponding second recess and rotate with the second recess that corresponds respectively and be connected, the inside of connecting rod (3) is seted up the through-hole and is cup jointed with the outer wall of pivot (2) is fixed, the last terminal wall fixedly connected with protractor (4) of connecting rod (3), protractor (4) rotate with first recess and are connected, the cavity has been seted up to the inside of pivot (2), the inside of cavity sets up in stop gear.

2. The teaching marking ruler as claimed in claim 1, wherein the limiting mechanism comprises a spring (5), a limiting rod (6) and a limiting block (7), the spring (5) is fixedly arranged inside the cavity, the upper end of the spring is fixedly connected with the limiting block (7), a third groove is formed in the upper side of the cavity and matched with the limiting block (7), a limiting hole is formed in the upper surface of the cavity, and the limiting rod (6) is matched with the limiting hole.

3. The teaching marking ruler as claimed in claim 2, wherein the second groove is provided with a through hole at the bottom, the limiting rod (6) passes through the limiting hole and the through hole respectively and extends upwards and is fixedly connected with a pressing block (8).

4. A teaching marking ruler according to claim 2, characterized in that the cross section of the limiting block (7) and the limiting rod (6) are rectangular.

5. The teaching marking ruler as claimed in claim 1, characterized in that a rubber pad (9) is fixed at the bottom edge of the triangular ruler (1).

6. An educational marking ruler according to claim 1 characterized in that the upper surface of the set square (1) is fixedly provided with a grab bar (10).