Telemeter rod for land surveying and mapping

Abstract

The utility model discloses a telemeter rod for land surveying and mapping, which comprises a first ruler section, a second ruler section and a third ruler section, the first ruler section, the second ruler section and the third ruler section are sequentially arranged from bottom to top, and the same sides, deviating from scale marks, of the first ruler section and the second ruler section are rotationally connected through a first hinge. According to the ruler provided by the invention, the mutual rotation effect between the second ruler section and the first ruler section is realized, so that the long-direction splicing and rotating folding effects between the first ruler section and the second ruler section are realized, and the mutual rotation effect between the second ruler section and the third ruler section is realized through the matching between the notch and the second hinge; compared with the prior art, the ruler has the advantages that the ruler is stretched and retracted in a rotating mode, the operation is more convenient, the problem that the scale marks are abraded due to friction between the ruler sections is effectively solved, and the service life is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of surveying rod technology, and in particular to a surveying rod for land mapping. Background Technology

[0002] A leveling rod is a type of leveling rod. Early leveling rods were mostly made of wood, which were heavy and limited in length (usually 2m), making them inconvenient to carry during measurements. Later, they were gradually made of lightweight, high-strength materials such as aluminum alloy, and adopted a tower-like retractable design, which made them easy to pull out during use. This greatly increased the range of single elevation measurements. The length is generally 5m, and it can be retracted for carrying. Because its shape resembles a tower, it is often called a leveling rod.

[0003] Traditional land surveying leveling rods typically extend and retract using a telescopic method. During frequent extension and retraction, friction easily occurs between the rod sections, causing wear on the scale markings painted on the rod sections and affecting its use. Furthermore, the telescopic method is inconvenient to use. Therefore, a new type of land surveying leveling rod is needed to meet people's needs. Utility Model Content

[0004] The purpose of this invention is to provide a land surveying measuring rod to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a land surveying measuring rod, comprising a first section, a second section, and a third section, arranged sequentially from bottom to top. The first section and the second section are rotatably connected on the same side away from the scale markings via a first hinge. A slot is provided on the side of the second section away from the scale markings, and the slot is rotatably connected to the side of the third section away from the scale markings via a second hinge. The ends of the first section and the second section, as well as the ends of the second section and the third section, are movably connected via locking mechanisms.

[0006] Preferably, the scale markings on the first, second, and third ruler sections are all processed by laser engraving.

[0007] Preferably, the first, second, and third sections all employ a partially hollow design.

[0008] Preferably, the locking mechanism comprises a sliding hole, a spring, a pin, a socket, a limiting groove, a connecting pin, and a pressure point block. The sliding hole is located at the ends of the first and second ruler sections. The spring is connected to the sliding hole, the pin is connected to the spring and slidably connected to the sliding hole, the socket is located at the ends of the second and third ruler sections and corresponds to the position of the pin, the limiting groove is located on the sides of the first and second ruler sections and communicates with the corresponding sliding hole, the connecting pin is connected to the side of the pin and slidably connected to the limiting groove, and the pressure point block is connected to the connecting pin and arranged on the outer side of the first and second ruler sections.

[0009] Preferably, a bellows cover is provided between one side of the connecting pin and one side of the inner wall of the limiting groove.

[0010] Preferably, the depth of the slot is the same as the sum of the thicknesses of the third section and the second hinge.

[0011] Preferably, a first strap is provided on one side of the first section, and a second strap is provided on the corresponding other side. The length of the first strap and the second strap is greater than the sum of the thicknesses of the first section and the second section, and the first strap and the second strap are connected by Velcro.

[0012] The beneficial effects of this utility model are:

[0013] In this invention, the first hinge enables mutual rotation between the second and first ruler sections, thus achieving longitudinal splicing and folding between them. The slot and the second hinge facilitate mutual rotation between the second and third ruler sections, again enabling longitudinal splicing and folding. Compared to existing technologies, this rotational extension and retraction method is more convenient and effectively avoids wear on the scale markings caused by friction between the ruler sections, thereby extending the service life.

[0014] This invention achieves vertical stability after the second and first ruler sections are joined together, as well as vertical stability after the third and second ruler sections are joined together, by setting up a locking mechanism. This ensures the overall performance of the tower gauge, reduces observation deviation, and makes the extension and retraction of the tower gauge more convenient. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the front view structure of a land surveying rod in its extended state, as proposed in this utility model.

[0016] Figure 2 This is a schematic diagram of the rear view structure of a land surveying rod in its extended state, as proposed in this utility model.

[0017] Figure 3This is a partial cross-sectional structural diagram of the locking mechanism of a land surveying rod proposed in this utility model;

[0018] Figure 4 This is a schematic diagram of the folded and contracted structure of a land surveying measuring rod proposed in this utility model.

[0019] In the diagram: 1. First section; 2. Second section; 3. Third section; 4. First hinge; 5. Groove; 6. Second hinge; 7. Locking mechanism; 8. Sliding hole; 9. Spring; 10. Pin; 11. Insertion hole; 12. Limiting groove; 13. Connecting pin; 14. Acupressure block; 15. Accordion guard; 16. First strap; 17. Second strap. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0021] Reference Figure 1-4 A land surveying measuring rod includes a first measuring section 1, a second measuring section 2, and a third measuring section 3, arranged sequentially from bottom to top. The first measuring section 1 and the second measuring section 2 are rotatably connected on the same side away from the scale markings by a first hinge 4. A slot 5 is provided on the side of the second measuring section 2 away from the scale markings, and the slot 5 is rotatably connected to the side of the third measuring section 3 away from the scale markings by a second hinge 6. The ends of the first measuring section 1 and the second measuring section 2, as well as the ends of the second measuring section 2 and the third measuring section 3, are movably connected by a locking mechanism 7.

[0022] The first hinge 4 connects the second section 2 and the first section 1, enabling mutual rotation and allowing for longitudinal splicing and folding. Similarly, the slot 5 and the second hinge 6 facilitate mutual rotation between the second section 2 and the third section 3, achieving the same effect. Compared to existing technologies, this rotational extension and retraction method is more convenient and effectively avoids wear on the scale markings caused by friction between sections, thus extending the service life. The locking mechanism 7 ensures vertical stability after the second section 2 and the first section 1 are joined, as well as after the third section 3 and the second section 2 are joined, guaranteeing the overall performance of the leveling rod, reducing observational errors, and making the extension and retraction of the leveling rod more convenient.

[0023] Specifically, in this embodiment, the scale markings on the first section 1, the second section 2, and the third section 3 are all processed by laser engraving to reduce the blurring caused by weathering.

[0024] Specifically, in this embodiment, the first section 1, the second section 2, and the third section 3 all adopt a partially hollow design. The lightweight design makes it easy for people to hold and carry.

[0025] Specifically, in this embodiment, the locking mechanism 7 consists of a sliding hole 8, a spring 9, a pin 10, an insertion hole 11, a limiting groove 12, a connecting pin 13, and a pressure point block 14. The sliding hole 8 is opened on the ends of the first ruler section 1 and the second ruler section 2. The spring 9 is connected inside the sliding hole 8. The pin 10 is connected to the spring 9 and is slidably connected inside the sliding hole 8. The insertion hole 11 is opened on the ends of the second ruler section 2 and the third ruler section 3 and corresponds to the position of the pin 10. The limiting groove 12 is opened on the sides of the first ruler section 1 and the second ruler section 2 and communicates with the corresponding sliding hole 8. The connecting pin 13 is connected to the side of the pin 10 and is slidably connected inside the limiting groove 12. The pressure point block 14 is connected to the connecting pin 13 and is arranged on the outside of the first ruler section 1 and the second ruler section 2.

[0026] During extension, rotate the second foot section 2 so that its end gradually approaches the end of the first foot section 1. Press down on the acupressure block 14. Through the connection of the connecting pin 13, the insertion pin 10 is inserted into the sliding hole 8. The spring 9 is compressed by the pressure of the insertion pin 10. After the end of the second foot section 2 merges with the end of the first foot section 1, release the acupressure block 14. The spring 9 loses pressure, and the instantaneous elastic force pushes the insertion pin 10 out of the sliding hole 8. At the same time, the protruding end is inserted into the insertion hole 11. Through the contact and engagement between the connecting pin 13 and the end of the limiting groove 12, the spring 9 is prevented from pushing the insertion pin 10 out of the sliding hole 8. Pin 10 is fully pushed out of the sliding hole 8, so that the two ends of pin 10 are respectively in the first section 1 and the second section 2, thereby restricting the rotation of the first section 1 and the second section 2 on the first hinge 4, and thus achieving the locking effect after the first section 1 and the second section 2 are spliced ​​together. The locking operation between the third section 3 and the second section 2 is the same. When unlocking, press down on the finger pressure block 14 to make pin 10 completely retract from the insertion hole 11 into the sliding hole 8, thereby unlocking the effect and realizing the rotation and folding effect of the first section 1, the second section 2 and the third section 3.

[0027] Specifically, in this embodiment, a bellows cover 15 is provided between one side of the connecting pin 13 and one side of the inner wall of the limiting groove 12 to ensure that the connecting pin 13 can move smoothly in the limiting groove 12, while preventing sand and dust from entering during outdoor surveying, which would obstruct the movement of the pin 10.

[0028] Specifically, in this embodiment, the depth of the slot 5 is the same as the sum of the thickness of the third section 3 and the second hinge 6, which improves the fit between the second section 2 and the third section 3 and the first section 1 after folding, reduces the overall volume after folding, and makes it easier to carry.

[0029] Specifically, in this embodiment, a first strap 16 is provided on one side of the first ruler section 1, and a second strap 17 is provided on the corresponding other side. The length of the first strap 16 and the second strap 17 is greater than the sum of the thicknesses of the first ruler section 1 and the second ruler section 2. The first strap 16 and the second strap 17 are connected by Velcro to provide an overall connection effect for the folded ruler and prevent it from loosening.

[0030] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A land surveying measuring rod, comprising a first measuring rod section (1), a second measuring rod section (2), and a third measuring rod section (3), characterized in that: The first ruler section (1), the second ruler section (2), and the third ruler section (3) are arranged sequentially from bottom to top. The first ruler section (1) and the second ruler section (2) are rotatably connected on the same side away from the scale mark by the first hinge (4). The second ruler section (2) has a slot (5) on the side away from the scale mark. The slot (5) and the third ruler section (3) are rotatably connected on the side away from the scale mark by the second hinge (6). The end of the first ruler section (1) and the end of the second ruler section (2), as well as the end of the second ruler section (2) and the end of the third ruler section (3), are movably connected by the locking mechanism (7).

2. The land surveying measuring rod according to claim 1, characterized in that: The scale markings on the first scale section (1), the second scale section (2), and the third scale section (3) are all processed by laser engraving.

3. The land surveying measuring rod according to claim 1, characterized in that: The first section (1), the second section (2), and the third section (3) all adopt a partially hollow design.

4. The land surveying measuring rod according to claim 1, characterized in that: The locking mechanism (7) consists of a sliding hole (8), a spring (9), a pin (10), a socket (11), a limiting groove (12), a connecting pin (13), and a pressure block (14). The sliding hole (8) is located at the ends of the first foot section (1) and the second foot section (2). The spring (9) is connected inside the sliding hole (8). The pin (10) is connected to the spring (9) and is slidably connected inside the sliding hole (8). The socket (11) is located at the ends of the second foot section (2). On the ends of the first and second foot sections (1) and the third foot section (3), and corresponding to the position of the pin (10), the limiting groove (12) is opened on the side of the first foot section (1) and the second foot section (2), and is connected to the corresponding sliding hole (8) respectively. The connecting pin (13) is connected to the side of the pin (10) and is slidably connected in the limiting groove (12). The finger pressure block (14) is connected to the connecting pin (13) and is arranged on the outside of the first foot section (1) and the second foot section (2).

5. A land surveying measuring rod according to claim 4, characterized in that: A bellows cover (15) is provided between one side of the connecting pin (13) and one side of the inner wall of the limiting groove (12).

6. A land surveying measuring rod according to claim 1, characterized in that: The depth of the slot (5) is the same as the sum of the thicknesses of the third section (3) and the second hinge (6).

7. A land surveying measuring rod according to claim 1, characterized in that: A first strap (16) is provided on one side of the first section (1), and a second strap (17) is provided on the corresponding other side. The length of the first strap (16) and the second strap (17) is greater than the sum of the thicknesses of the first section (1) and the second section (2). The first strap (16) and the second strap (17) are connected by Velcro.

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