Surveying and mapping pen capable of drawing circles

Abstract

The utility model discloses a surveying and mapping pen capable of drawing circles, and belongs to the technical field of paintbrushes. Comprising a main pen body and an auxiliary pen body, the writing end of the main pen body and the writing end of the auxiliary pen body are each fixedly provided with a threaded head, the main pen body is detachably provided with a graduated scale, the graduated scale is provided with a through hole and a strip-shaped hole which are matched with the threaded heads, and the auxiliary pen body and the graduated scale are detachable. The first nut and the second nut are taken down from the threaded head, then the threaded head of the main pen end is inserted into the through hole, the first nut is in threaded connection with the threaded head of the main pen end, the threaded head of the auxiliary pen is inserted into the strip-shaped hole, and the radius of a circle is adjusted by observing the corresponding adjustment of the reference groove and the scale marks of the calibrated scale. And finally, the second nut is in threaded connection with the thread head of the auxiliary pen, so that the auxiliary pen is fixed on the graduated scale, and the circle drawing completeness is guaranteed.

Description

Technical Field

[0001] The present application relates to the technical field of paintbrushes, and more specifically, to a surveying pen capable of drawing circles. Background Art

[0002] It is well-known that drafters need to use a variety of drawing tools during the drawing process, such as drawing straight lines with a ruler and drawing circles with a compass, etc.; existing paintbrushes only serve to draw lines; therefore, if a circle needs to be drawn during the drawing process, the paintbrush needs to be combined with the drawing tools to complete it together, resulting in troublesome operations, the need to carry more drawing tools, and it is easy to cause negligence or omission of drawing tools.

[0003] The prior art document with the publication number CN 206264648 U provides a surveying pen. This device is provided with a first rotating block and a second rotating block on the main pen and the sub-pen respectively. At the same time, one end of the scale is connected to the first rotating block and passes through the second rotating block. Therefore, by removing the sub-pen from the main pen and rotating the first rotating block and the second rotating block at the same time, the tips of the main pen and the sub-pen are both located on the paper, and then the sub-pen is slid on the scale to adjust the distance between the sub-pen and the main pen, fix one of the pens, and the other pen rotates around the fixed pen on the paper to draw a circle. By adjusting the distance between the main pen and the sub-pen, circles with different diameters can be drawn. Therefore, the surveying pen described in the present utility model can draw circles, thus reducing the use of drawing tools and improving the drawing efficiency.

[0004] Although the above prior art solution can achieve the relevant beneficial effects through the structure of the prior art, there are still the following defects: when the scale is inserted into the rotating block during use, there is a lack of effective fixation, which easily causes the sub-pen to move during the process of drawing a circle, resulting in the problem that the circle cannot be drawn completely.

[0005] In view of this, we propose a surveying pen capable of drawing circles. Summary of the Utility Model

[0006] 1. Technical Problems to be Solved

[0007] The purpose of the present application is to provide a surveying pen capable of drawing circles, which solves the technical problems in the above background art and achieves the technical effect of ensuring the integrity of drawing circles.

[0008] 2. Technical Solution

[0009] The technical solution of the present application provides a surveying pen capable of drawing circles, including a main pen and a sub-pen. Threaded heads are fixedly installed at the writing ends of the main pen and the sub-pen. The main pen is detachably provided with a scale. Through holes and strip-shaped holes adapted to the threaded heads are formed on the scale, and the sub-pen is detachable from the scale.

[0010] By adopting the above technical solution, the main pen and the secondary pen are detachable and assembleable for easy assembly, carrying, disassembly and use. When the through hole is sleeved on the threaded head of the main pen, the axis of the through hole is collinear with the pen tip, and the zero scale line of the scale is collinear with the pen tip. When drawing a circle, sleeve the through hole on the threaded head of the main pen, insert the threaded head of the secondary pen into the strip-shaped hole, and after adjusting the distance between the secondary pen and the main pen, fix the secondary pen on the scale. At this time, with the main pen as the center, the secondary pen can be rotated around the main pen to draw a circle.

[0011] As an alternative solution of the technical solution of this application document, a first nut and a second nut are threadedly connected to the threaded head.

[0012] By adopting the above technical solution, when the secondary pen is threadedly connected to the main pen, at this time, both the first nut and the second nut are threadedly connected to the threaded head of the main pen. When it is necessary to draw a circle, remove the first nut and the second nut from the threaded head, then insert the threaded head at the main pen end into the through hole, thread the first nut to the threaded head at the main pen end, insert the threaded head of the secondary pen into the strip-shaped hole, and then thread the second nut to the threaded head of the secondary pen to fix the secondary pen on the scale.

[0013] As an alternative solution of the technical solution of this application document, a fixing seat is fixedly installed on the main pen, and an installation opening adapted to one end of the scale is provided on the fixing seat.

[0014] By adopting the above technical solution, after the scale is used up, insert the scale vertically into the installation opening, and the scale can be stored on one side of the main pen.

[0015] As an alternative solution of the technical solution of this application document, a reference groove is provided at the writing end of the secondary pen.

[0016] By adopting the above technical solution, the reference groove is parallel to the writing end of the secondary pen, so that the reference groove corresponds to the scale line of the scale, so as to visually observe the distance between the main pen and the secondary pen.

[0017] As an alternative solution of the technical solution of this application document, the threaded head at the secondary pen end is threadedly connected to the main pen away from the writing end.

[0018] By adopting the above technical solution, an internal threaded hole is provided at the upper end of the main pen to threadedly connect the threaded head at the secondary pen end to the internal threaded hole at the upper end of the main pen for easy disassembly and assembly of the main pen and the secondary pen.

[0019] 3. Beneficial effects

[0020] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

[0021] 1. In this application, the auxiliary pen is removed from the upper end of the main pen, the first nut and the second nut are removed from the threaded head, then the threaded head at the main pen end is inserted into the through hole, and the first nut is threadedly connected to the threaded head at the main pen end. The threaded head of the auxiliary pen is inserted into the strip hole, and the radius of the circle is adjusted by observing the correspondence between the reference groove and the scale line of the scale. Finally, the second nut is threadedly connected to the threaded head of the auxiliary pen to fix the auxiliary pen on the scale, ensuring the integrity of drawing a circle. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 FIG. 1 is a schematic diagram of the overall structure of a surveying pen capable of drawing a circle disclosed in a preferred embodiment of the present application;

[0023] Figure 2 A surveying pen capable of drawing a circle disclosed in a preferred embodiment of the present application Figure 1 FIG. 2 is an enlarged schematic diagram of part A in FIG. 1;

[0024] Figure 3 FIG. 3 is a schematic diagram of the overall state of drawing a circle of a surveying pen capable of drawing a circle disclosed in a preferred embodiment of the present application;

[0025] Figure 4 FIG. 4 is a schematic diagram of the scale of a surveying pen capable of drawing a circle disclosed in a preferred embodiment of the present application;

[0026] Figure 5 FIG. 5 is a schematic diagram of the auxiliary pen of a surveying pen capable of drawing a circle disclosed in a preferred embodiment of the present application;

[0027] Reference numerals in the drawings: 1, main pen; 101, first nut; 102, second nut; 103, fixed seat; 1031, installation opening; 2, auxiliary pen; 201, reference groove; 3, scale; 301, through hole; 302, strip hole; 4, threaded head. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] The present application will be further described in detail below with reference to the accompanying drawings of the specification.

[0029] A surveying pen capable of drawing a circle includes a main pen 1 and an auxiliary pen 2. Threaded heads 4 are fixedly installed at the writing ends of the main pen 1 and the auxiliary pen 2. The main pen 1 is detachably provided with a scale 3. The scale 3 is provided with a through hole 301 and a strip hole 302 adapted to the threaded head 4. The auxiliary pen 2 is detachably connected to the scale 3.

[0030] Refer to Figures 1 - 5, the main pen 1 and the secondary pen 2 are detachable for easy assembly, carrying, disassembly and use. When the through hole 301 is sleeved on the threaded head 4 of the main pen 1, the axis of the through hole 301 is collinear with the pen tip, and the zero scale line of the scale 3 is collinear with the pen tip. When drawing a circle, sleeve the through hole 301 on the threaded head 4 of the main pen 1, insert the threaded head 4 of the secondary pen 2 into the strip hole 302, and after adjusting the distance between the secondary pen 2 and the main pen 1, fix the secondary pen 2 on the scale 3. At this time, with the main pen 1 as the center, the secondary pen 2 can be rotated around the main pen 1 to draw a circle.

[0031] A first nut 101 and a second nut 102 are threadedly connected to the threaded head 4.

[0032] Refer to Figure 2 and Figure 3 , when the secondary pen 2 is threadedly connected to the main pen 1, at this time both the first nut 101 and the second nut 102 are threadedly connected to the threaded head 4 of the main pen 1. When drawing a circle is needed, remove the first nut 101 and the second nut 102 from the threaded head 4, then insert the threaded head 4 at the end of the main pen 1 into the through hole 301, thread the first nut 101 with the threaded head 4 at the end of the main pen 1, insert the threaded head 4 of the secondary pen 2 into the strip hole 302, and then thread the second nut 102 with the threaded head 4 of the secondary pen 2 to fix the secondary pen 2 on the scale 3.

[0033] A fixed seat 103 is fixedly installed on the main pen 1, and an installation opening 1031 adapted to one end of the scale 3 is provided on the fixed seat 103.

[0034] Refer to Figure 3 , when the scale 3 is not in use, vertically insert the scale 3 into the installation opening 1031, and the scale 3 can be stored on one side of the main pen 1.

[0035] A reference groove 201 is provided at the writing end of the secondary pen 2.

[0036] Refer to Figure 5 , the reference groove 201 is parallel to the writing end of the secondary pen 2, so that the reference groove 201 corresponds to the scale line of the scale 3 to visually observe the distance between the main pen 1 and the secondary pen 2.

[0037] The threaded head 4 at the end of the secondary pen 2 is threadedly connected to the main pen 1 away from the writing end.

[0038] Refer to Figure 1 and Figure 2 , an internal threaded hole is provided at the upper end of the main pen 1 to threadedly connect the threaded head 4 at the end of the secondary pen 2 with the internal threaded hole at the upper end of the main pen 1 for easy disassembly and assembly of the main pen 1 and the secondary pen 2.

[0039] Working principle: When drawing a circle is required, remove the secondary pen 2 from the upper end of the primary pen 1, take off the first nut 101 and the second nut 102 from the threaded head 4, then insert the threaded head 4 at the end of the primary pen 1 into the through hole 301, thread the first nut 101 onto the threaded head 4 at the end of the primary pen 1, insert the threaded head 4 of the secondary pen 2 into the strip hole 302, and adjust by observing the correspondence between the reference groove 201 and the scale lines of the scale 3 to adjust the radius of the circle. Finally, thread the second nut 102 onto the threaded head 4 of the secondary pen 2 to fix the secondary pen 2 on the scale 3.

Claims

1. A surveying pen capable of drawing circles, comprising a main pen (1) and a secondary pen (2), characterized in that: The writing ends of the main pen (1) and the secondary pen (2) are both fixedly installed with threaded heads (4). The main pen (1) is detachably provided with a scale (3). Through holes (301) and strip holes (302) adapted to the threaded heads (4) are formed in the scale (3). The secondary pen (2) is detachably connected to the scale (3).

2. The surveying and mapping pen capable of drawing a circle according to claim 1, wherein: A first nut (101) and a second nut (102) are threadedly connected to the threaded head (4).

3. The surveying and mapping pen capable of drawing a circle according to claim 1, wherein: A fixed seat (103) is fixedly installed on the main pen (1). An installation opening (1031) adapted to one end of the scale (3) is formed in the fixed seat (103).

4. A surveying pen capable of drawing a circle according to claim 1, characterized in that: A reference groove (201) is formed in the writing end of the secondary pen (2).

5. The surveying and mapping pen capable of drawing a circle according to claim 1, wherein: The threaded head (4) at the end of the secondary pen (2) is threadedly connected to the main pen (1) away from the writing end.

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