CN213861612U

CN213861612U - Teaching is supplementary with combination chi

Info

Publication number: CN213861612U
Application number: CN202022702534.2U
Authority: CN
Inventors: 李晶
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-11-20
Filing date: 2020-11-20
Publication date: 2021-08-03
Anticipated expiration: 2030-11-20

Abstract

The utility model relates to a combined ruler for teaching assistance, which is provided with a ruler body for surveying and mapping straight lines; the front end of the ruler body is provided with an arc-shaped transition surface; scale marks are uniformly distributed on the arc transition surface; an auxiliary ruler is clamped at the lower end of the ruler body; a guide unit is additionally arranged on the surface of the ruler body opposite to the auxiliary ruler; the auxiliary ruler moves relative to the ruler body in a telescopic mode along the guide unit; a marking area is arranged on the auxiliary ruler; scale marks are uniformly distributed in the labeling area; an angle measuring unit is arranged at the transverse middle position of the ruler body; and a window is arranged on the auxiliary ruler corresponding to the position of the angle measuring unit. The utility model aims at overcoming the defect that prior art exists, provide a teaching is supplementary with combination chi that the practicality is strong.

Description

Teaching is supplementary with combination chi

Technical Field

The utility model relates to a teaching auxiliary device field especially relates to a teaching is supplementary with combination chi.

Background

Teaching is that teachers purposefully and organically guide students to learn, master cultural scientific knowledge and skills, and promote the improvement of the quality of the students so that the students become useful talents required by the society. Therefore, the teaching method has very important significance. In the teaching process in the junior middle school, the ruler is a common teaching auxiliary device, but the length of the existing ruler is fixed, and when some longer line segments are drawn or measured, the position of the ruler needs to be continuously adjusted, so that the ruler is inconvenient for teachers to use; in addition, the existing ruler can only draw straight lines frequently, when angle surveying and mapping are involved in the teaching process, a protractor needs to be additionally used for surveying and mapping, and the burden of a teacher in the using process is increased. Therefore, it is necessary to design a teaching aid combination ruler with strong practicability.

Disclosure of Invention

The utility model aims at overcoming the defect that prior art exists, provide a teaching is supplementary with combination chi that the practicality is strong.

Realize the utility model discloses the technical scheme of purpose is: a combined ruler for teaching assistance is provided with a ruler body for surveying and mapping straight lines; the front end of the ruler body is provided with an arc-shaped transition surface; scale marks are uniformly distributed on the arc transition surface; an auxiliary ruler is clamped at the lower end of the ruler body; a guide unit is additionally arranged on the surface of the ruler body opposite to the auxiliary ruler; the auxiliary ruler moves relative to the ruler body in a telescopic mode along the guide unit; a marking area is arranged on the auxiliary ruler; scale marks are uniformly distributed in the labeling area; an angle measuring unit is arranged at the transverse middle position of the ruler body; and a window is arranged on the auxiliary ruler corresponding to the position of the angle measuring unit.

Furthermore, the guide unit comprises a guide post integrally formed on the upper end surface of the auxiliary ruler and a guide groove formed in the lower end surface of the ruler body; the guide post is clamped in the guide groove.

Further, the guide groove is rectangular, T-shaped or inverted trapezoidal; the shape of the guide post is matched with that of the guide groove.

Furthermore, the angle measuring unit comprises a scale area connected with the ruler body, a window penetrating through the ruler body and a pointer for assisting mapping; the scale area main body is a semicircle with evenly distributed angle pointing lines; the window is semi-annular; the semi-annular window is superposed with the central origin of the scale area main body; the root of the pointer is rotatably arranged at the central origin of the window and the scale area main body through a bolt; a through hole penetrates through the center point of the bolt; the through hole penetrates through the auxiliary ruler.

Furthermore, an auxiliary groove is formed in the position, close to the edge, of the lower end face of the auxiliary ruler.

Furthermore, a through groove is formed in the lower end face of the ruler body; a guide button is additionally arranged at the left end of the auxiliary ruler corresponding to the position of the through groove; the shape of the guide button is matched with the size and the shape of the lower half section of the through groove.

Further, the cross-section of logical groove is the arc and the arc bottom is link up.

Furthermore, the front end of the guide knob is in a slope shape.

After the technical scheme is adopted, the utility model discloses following positive effect has: the added auxiliary ruler part of the utility model can meet the surveying and mapping of longer straight lines, and the added angle measuring unit can meet the surveying and mapping of angle lines; in addition, the auxiliary groove is arranged to facilitate the auxiliary ruler to pull outwards; the cooperation of leading to groove and direction button is convenient for accomodate the pen and take out the pen at last, and simple structure and practicality are strong.

Drawings

In order that the present invention may be more readily and clearly understood, the following detailed description of the present invention is given in conjunction with the accompanying drawings, in which

Fig. 1 is a perspective view of embodiment 1 of the present invention;

fig. 2 is an outward drawing of the auxiliary ruler in embodiment 1 of the present invention;

fig. 3 is a bottom view of embodiment 2 of the present invention;

fig. 4 is a perspective view of embodiment 3 of the present invention;

fig. 5 is a perspective exploded view of embodiment 3 of the present invention;

fig. 6 is an outward drawing of the auxiliary ruler in embodiment 3 of the present invention.

The reference numbers in the drawings are as follows: ruler body 10, arc transition surface 11, auxiliary ruler 20, mark area 21, window 22, auxiliary groove 23, guide button 24, guide unit 30, guide column 31, guide groove 32, angulometry unit 40, scale area 41, window 42, pointer 43, bolt 44 and through hole 45.

Detailed Description

(example 1)

Referring to fig. 1 and 2, the present invention has a straightedge body 10 for plotting a straight line; the front end of the ruler body 10 is provided with an arc-shaped transition surface 11; the arc transition surface 11 is uniformly distributed with scale marks which are not shown in the figure, and the specific distribution of the scale marks refers to the scales on the existing ruler; an auxiliary ruler 20 is clamped at the lower end of the ruler body 10; a guide unit 30 is additionally arranged on the surface of the ruler body 10 opposite to the auxiliary ruler 20; the auxiliary ruler 20 is telescopically moved relative to the straightedge body 10 along the guide unit 30, that is, the auxiliary ruler 20 can be pulled outwards relative to the straightedge body 10, the auxiliary ruler 20 pulled outwards can be pushed inwards relative to the straightedge body 10 under the action of the guide unit 30, and the telescopic movement is achieved by pulling and pushing; a marking area 21 is arranged on the auxiliary ruler 20; scale marks are uniformly distributed in the marking area 21; an angle measuring unit 40 is arranged at the transverse middle position of the ruler body 10; the sub-scale 20 corresponding to the position of the angle measuring unit 40 is provided with a window 22.

More specifically in the present embodiment, the guide unit 30 includes a guide post 31 integrally formed on the upper end surface of the sub-scale 20 and a guide groove 32 opened on the lower end surface of the straightedge body 10; the guide posts 31 are snap-fitted into the guide slots 32. The guide unit 30 is provided to prevent the relative position of the main ruler and the auxiliary ruler in the longitudinal direction from shifting in the process of extension and retraction of the auxiliary ruler 20, and under the action of the guide unit 30, the extension and retraction process is stable and convenient.

More specifically in this embodiment, the guide groove 32 is rectangular, T-shaped, or inverted trapezoidal; the shape of the guide post 31 matches the shape of the guide slot 32, wherein a rectangular shape is illustrated, and a T-shaped or inverted trapezoidal shape is not illustrated.

More specifically in the present embodiment, the angle measuring unit 40 includes a scale area 41 connected to the straightedge body 10, a window 42 extending through the straightedge body 10, and a pointer 43 for assisting mapping; the main body of the scale area 41 is a semicircle with evenly distributed angle pointing lines; the window 42 is semi-annular; the semicircular window 42 coincides with the central origin of the main body of the scale region 41, where the window 42 coincides with the window 22 on the secondary scale 20; the root of the pointer 43 is rotatably arranged at the central origin point of the window 42 and the main body of the scale area 41 through a bolt 44; a through hole 45 penetrates through the center point of the bolt 44; through hole 45 extends through minor scale 20. When the auxiliary ruler is used, if a longer straight line needs to be mapped, the auxiliary ruler 20 is directly pulled out along the guide unit 30, and can be directly pushed inwards to reset after use; if the angle line needs to be mapped, the center of the circle is determined, then the center of the circle coincides with the center of the through hole 45, then the pointer 43 is rotated to the required angle, a pen is used for marking along the pointer 43 through the window 42 and the window 22, meanwhile, a straight line is made along the lower end face of the ruler body 10, and finally the straight line is connected with the selected angle line.

(example 2)

Referring to fig. 3, in this embodiment, on the basis of embodiment 1, it is more preferable that an auxiliary groove 23 is formed at a position near an edge of a lower end surface of the auxiliary ruler 20, and the auxiliary groove 23 is convenient for a finger to buckle the auxiliary ruler 20 to pull outward, so that the structure is simple and the operation is fast.

(example 3)

Referring to fig. 4 to 6, in this embodiment, on the basis of embodiment 1, a through groove 12 is further preferably formed on the lower end surface of the straightedge body 10; a guide button 24 is additionally arranged at the left end of the auxiliary ruler 20 corresponding to the position of the through groove 12; the shape of the guide button 24 is matched with the size and the shape of the lower half section of the through groove 12; when secondary rule 20 is withdrawn, guide knob 24 slides along channel 12, where guide knob 24 serves as a guide.

The cross-section that leads to groove 12 is the arc and the arc bottom is link up, sets up to the arc and is convenient for place in leading to groove 12 and accomodates the pen, and the external diameter of the pen here can slightly be greater than the opening in leading to groove 12, is convenient for like this the pen card to put into leading to groove 12.

The front end of the guide button 24 is in a slope shape, the upper end face of the guide button 24 is higher than the lower end face of a pen clamped in the through groove 12, and the slope-shaped front end is beneficial to lifting the pen placed in the through groove 12 in the process that the auxiliary ruler 20 is pulled outwards, so that the pen is convenient to take out of the through groove 12.

The utility model discloses a theory of operation does: when the auxiliary ruler is used, if a longer straight line needs to be mapped, the auxiliary ruler 20 is directly pulled out along the guide unit 30, and can be directly pushed inwards to reset after use; if the angle line needs to be mapped, the center of the circle is determined, then the center of the circle coincides with the center of the through hole 45, then the pointer 43 is rotated to the required angle, a pen is used for marking along the pointer 43 through the window 42 and the window 22, meanwhile, a straight line is made along the lower end face of the ruler body 10, and finally the straight line is connected with the selected angle line. When a pen is placed in the through groove 12, the auxiliary groove 23 is buckled by a hand and pulled outwards, the auxiliary ruler 20 moves outwards and drives the guide button 24 to move outwards, the slope at the front end of the guide button 24 lifts the pen clamped in the through groove 12 upwards, and then the pen is directly taken out.

The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above-mentioned embodiments are only specific embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. A teaching aid combination ruler has a ruler body (10) for drawing a straight line; the front end of the ruler body (10) is provided with an arc-shaped transition surface (11); scale marks are uniformly distributed on the arc-shaped transition surface (11); the method is characterized in that: an auxiliary ruler (20) is clamped at the lower end of the ruler body (10); a guide unit (30) is additionally arranged on the surface of the ruler body (10) opposite to the auxiliary ruler (20); the auxiliary ruler (20) moves relative to the ruler body (10) in a telescopic mode along the guide unit (30); a marking area (21) is arranged on the auxiliary ruler (20); scale marks are uniformly distributed in the marking area (21); an angle measuring unit (40) is arranged at the transverse middle position of the ruler body (10); a window (22) is arranged on the auxiliary ruler (20) corresponding to the position of the angle measuring unit (40).

2. A teaching aid composite ruler according to claim 1, wherein: the guide unit (30) comprises a guide column (31) integrally formed on the upper end face of the auxiliary ruler (20) and a guide groove (32) formed in the lower end face of the ruler body (10); the guide post (31) is clamped in the guide groove (32).

3. The teaching aid combined ruler according to claim 2, characterized in that: the guide groove (32) is rectangular, T-shaped or inverted trapezoidal; the shape of the guide post (31) is matched with that of the guide groove (32).

4. A teaching aid composite ruler according to claim 3, wherein: the angle measuring unit (40) comprises a scale area (41) connected with the ruler body (10), a window (42) penetrating through the ruler body (10) and a pointer (43) used for auxiliary surveying and mapping; the main body of the scale area (41) is in a semicircular shape uniformly distributed with angle pointing lines; the window (42) is semi-annular; the semi-annular window (42) is superposed with the central origin of the main body of the scale area (41); the root part of the pointer (43) is rotatably arranged at the central origin point of the window (42) and the main body of the scale area (41) through a bolt (44); a through hole (45) penetrates through the center point of the bolt (44); the through hole (45) penetrates through the auxiliary ruler (20).

5. A teaching aid combination ruler according to any one of claims 1 to 4, wherein: an auxiliary groove (23) is formed at the position, close to the edge, of the lower end face of the auxiliary ruler (20).

6. A teaching aid composite ruler according to claim 5, wherein: a through groove (12) is formed in the lower end face of the ruler body (10); a guide button (24) is additionally arranged at the left end of the auxiliary ruler (20) corresponding to the position of the through groove (12); the shape of the guide button (24) is matched with the size and the shape of the lower half section of the through groove (12).

7. A teaching aid composite ruler according to claim 6, wherein: the cross section of the through groove (12) is arc-shaped, and the arc-shaped bottom end is communicated.

8. A teaching aid composite ruler according to claim 6, wherein: the front end of the guide button (24) is in a slope shape.