CN205836314U - A kind of multifunctional ruler for topographic map drawing - Google Patents

Abstract

The utility model discloses a multifunctional ruler for topographic map surveying and mapping. A multifunctional ruler for topographic map drawing includes ruler I and ruler II, and is characterized in that both ruler I and ruler II include a straightedge part, One end of the ruler I is connected to a ring, and the ring is provided with an angle scale. One end of the ruler II is provided with a raised solid circular platform, and the solid circular platform is embedded in the ring of the ruler I. The utility model can directly measure the included angle between two feet, and can also rotate the designed angle value, and then draw a straight line along the two feet to draw the designed angle value, and the ruler part has a scale, and can also measure the corresponding line segment length.

Description

A multifunctional ruler for topographic map drawing

technical field

The utility model relates to an instrument for measuring and drawing, in particular to a measuring ruler for drawing which integrates distance measurement and angle measurement.

Background technique

Rulers and scales are drawing and measuring tools that people often use in their daily work, life and study. Most of the existing rulers are scales, triangle rulers, etc. These rulers have single functions, and people need more rulers when drawing The cooperation can draw the required graphics. In the current technology, if you want to draw a topographic map of a certain proportion, you need a scale and a protractor to cooperate with each other. This process is very cumbersome, with a large workload, time-consuming and prone to errors. In the situation where the drawing accuracy is very high, There is an urgent need to design a mapping ruler that can measure distances and draw angles. At present, there are measuring tools that integrate angle measurement and length measurement, but generally an angle ruler and a length ruler are connected together through a rotating shaft or a pin to realize functional superposition.

Utility model content

The purpose of the utility model is to overcome the defects that the traditional drawing requires a scale and a protractor to cooperate with each other, repeated operations are time-consuming and labor-intensive, and the error is relatively large, and to provide a drawing ruler that can measure both distance and angle , it does not need to be connected by a rotating shaft or a pin, and directly combines two length measuring rulers to realize angle measurement.

The utility model is realized through the following scheme:

A multifunctional ruler for topographic map drawing, including ruler I and ruler II, both of which include a straightedge part, one end of ruler I is connected to a ring, and an angle scale is provided on the ring, and the ruler II One end is provided with a raised solid round platform, which is embedded in the ring of ruler I.

The upper semicircle part of the ring has a scale of 0°--180°.

The thickness of the ruler part of the ruler I is 2 mm, and the thickness of the ring part is 1 mm.

The radius of the solid truncated cone is equal to the radius of the hollow part of the circular ring of the ruler I.

The thickness of the ruler part of the ruler I and ruler II is the same, the ring part is concave, the solid round platform part is convex, and the solid round platform is embedded in the hollow part of the ring.

When the ruler II rotates, a ruler side line coincides with the ring angle scale of the ruler I.

Except for the scale, the remaining parts of the ruler I and ruler II are transparent.

The beneficial effects of the utility model are:

1. It is made according to the principle that two scales are fixed to each other and one end is rotated to measure angles of different sizes. The size of the angle can be directly measured by the scale on the ring of ruler I, and the corresponding angle can be drawn by drawing a straight line along the two scales.

2. Length scales are marked on ruler I and ruler II, so that the length of the drawn line segment can also be measured.

3. It can be rotated flexibly when in use, and the range of 0°--180° that meets the requirements of drawing topographic maps can be measured; it can be closed after use, does not occupy space, is easy to carry, and is suitable for field measurement work.

4. Directly use ruler I and ruler II to fit and connect, and use the connecting part to measure the angle, without additional pins or shafts, the structure is simpler and more durable.

Description of drawings

Fig. 1 is the structural front view of multifunctional ruler of the present utility model;

Fig. 2 is the ruler I schematic diagram of the present utility model;

Fig. 3 is the chi II schematic diagram of the utility model;

In the figure: 1 is the ruler body, 2 is the ruler part of ruler I, 3 is the ruler part of ruler II, 4 is the ring part of ruler I, 5 is the solid round platform of ruler II, 6 is the internal scale line of ruler I, and 7 is the ruler Ⅱ internal scale line, 8 is the internal scale line of ruler Ⅰ ring.

detailed description

The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

Below in conjunction with Fig. 1 and Fig. 2 and Fig. 3 the preferred embodiment of the present utility model is described further:

A multifunctional ruler for topographic map drawing, comprising a ruler body 1, including ruler I and ruler II, ruler I ruler part 2 and ruler I ring part 4 at one end thereof constitute ruler I, ruler I ruler part 2 is provided with ruler I inner scale line, and ruler I ring part 4 is provided with ruler I ring internal scale line 8, and ruler II ruler part 3 and the ruler II solid circular platform 5 at one end constitute ruler II, ruler II ruler Part 3 is provided with internal scale lines of ruler II, and the radius of the solid circular platform 5 of ruler II is equal to the radius of the hollow part of the ring part 4 of ruler II, and the solid circular platform 5 of ruler II is embedded in the hollow part of the ring part 4 of ruler I.

The range of the scale line 8 inside the ring of the ruler I is 0°--180° scale.

Said, the thickness of ruler I ruler part 2 is 2mm, and the thickness of ruler I ring part 4 is 1mm.

The thickness of the ruler portion of the ruler I and ruler II is the same, the ring part 4 of the ruler I is concave, and the solid circular platform 5 of the ruler II is convex.

When the ruler II rotates, a ruler side line coincides with the ring angle scale of the ruler I.

Except for the scale, the remaining parts of the ruler I and ruler II are transparent.

Ruler I and ruler II have a common end after splicing. The common end is provided with a dial with degree divisions, which is similar to a protractor and is used to measure angles, with a range of 0°-180°. The ring portion 4 of Fig. 1 has a scale division of 0°-180°. The solid circle 5 can be embedded in the hollow part of the ring 4 and can rotate.

According to above-mentioned characteristics of the present utility model, in conjunction with the method and principle that topographic map draws: topographic map is drawn according to control point (known point), draws topographic map and generally adopts polar coordinate method, promptly needs a distance parameter and angle parameter. When drawing feature points of land features, each feature point needs a specific angle value and length value. Correspondingly, the center point of the ring part 4 of the ruler I is aligned with the known point (starting point), the inner scale line 6 of the ruler I is aligned with the known zero direction in the drawing, and a line is drawn along the inner scale line 6 of the ruler I (the starting edge), Then rotate the corresponding angle according to the size of the horizontal angle on the known point of the drawing, measure and draw an angle of a specific size, the ruler II rotates, and the edge of the inner scale line 7 of the ruler II aligns with the ring part 4 of the ruler I on the corresponding scale value, and then draw a line segment along the internal scale line 7 of the ruler II, the length is the measured distance value, and the end point of the line segment is the feature point required by the drawing, that is, the drawing of a feature point is completed, and other land objects and landforms are drawn sequentially After each feature point is drawn, use the ruler part of ruler I or ruler II to connect each feature point of the same feature in turn. For example, if the four corners of a house are connected, the outline of the house can be obtained. Such a ruler can complete the drawing process of angle measurement and edge measurement. Since the scale and protractor do not need to cooperate with each other to draw, the workload of drawing is greatly reduced and time is saved. The most important thing is that the drawing work requires high precision. According to the utility model, a multifunctional ruler used for topographic map drawing can greatly reduce the occurrence of drawing errors and error accumulation phenomena.

After use, it can be flexibly rotated and retracted between two feet, and it does not take up space in the pocket of the clothes. It is easy to carry and is very suitable for field measurement work.

Although the specific implementation of the present invention has been described in detail above, it should be understood that for those skilled in the art, it is not necessary for those skilled in the art to make modifications to the above embodiments or adopt equivalent alternatives. It is obvious that these modifications or improvements made on the basis of not departing from the spirit of the utility model all belong to the protection scope of the utility model.

Claims (4)

1. for a multifunctional ruler for topographic map drawing, including chi I and chi II, it is characterised in that chi I and chi II all include directly Chi part, one end of chi I connects an annulus, and annulus is provided with angle index, and one end of chi II is provided with the solid round platform of projection, Solid round platform embeds in the annulus of chi I, described chi I and the ruler part consistency of thickness of chi II, and ring part caves in, solid round platform Part is protruding, and solid round platform embeds the hollow parts of annulus, when described chi II rotates, and one bar ruler sideline and the annulus of chi I Angle index overlaps, and the ruler part thickness of described chi I is 2mm, and ring part thickness is 1mm.

Multifunctional ruler for topographic map drawing the most according to claim 1, it is characterised in that described annulus upper semi-circle portion Divide and have 0 °--180 ° of scales.

Multifunctional ruler for topographic map drawing the most according to claim 1, it is characterised in that described solid round platform radius Radius equal to the annulus hollow parts of chi I.

Multifunctional ruler for topographic map drawing the most according to claim 1, it is characterised in that described chi I and chi II remove Outside scale, remainder is transparent.