Geographic surveying and mapping scale

Abstract

A ruler for geographical surveying and mapping comprises a first ruler body, a first left side sleeve, a first right side sleeve, a second ruler body, a second ruler body side sleeve, a third ruler body, a third ruler body side sleeve, a rectangular supporting sleeve, a rotating pressing plate, an arc-shaped sliding rod and a spring. The second scale is matched with the first right side sleeve, the second scale penetrates through the first right side sleeve to be inserted into the first scale, the second scale slides in the first scale, the second scale is connected with the second scale side sleeve, the third scale is matched with the second scale side sleeve, the third scale penetrates through the second scale side sleeve to be inserted into the second scale, and the third scale slides in the second scale. The side face of the third ruler is connected with a third ruler side sleeve, and the first ruler, the second ruler and the third ruler are the same in length.

Description

Technical Field

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

[0002] An existing patent (publication number: CN213874299U) proposes a ruler for geographic surveying, including a ruler body, a first sliding frame, a second sliding frame, and a light-emitting plate. The top of the ruler body is provided with a first telescopic ruler, which is slidably connected to the ruler body. The top of the first telescopic ruler is provided with a second telescopic ruler, which is slidably connected to the first telescopic ruler. A first fixing bolt is provided on one side of the upper end of the ruler body, which is rotatably connected to the ruler body. However, the extension and retraction between the various telescopic rulers of this ruler need to be limited by the fixing bolt, which is inconvenient to operate and the telescopic rulers are prone to deformation under the pressure of the bolt. Improvement is needed. Summary of the Invention

[0003] This utility model addresses the aforementioned shortcomings of the existing technology by providing a geodetic scale where a spring, supported by a first right sleeve, applies a thrust to a rotating pressure plate, causing the pressure plate to rotate. This, in turn, causes the symmetrical pressure plate side plates to clamp a second scale, ensuring the extension and retraction length between the first and second scales. Two sets of rotating pressure plates are respectively installed at both ends of the first right sleeve and the second scale side sleeve, used to control the extension and retraction of the entire scale.

[0004] The objective of this utility model is achieved through the following technical solution:

[0005] A geographic surveying scale includes a first scale, a first left sleeve, a first right sleeve, a second scale, a second scale side sleeve, a third scale, a third scale side sleeve, a rectangular support sleeve, a rotating pressure plate, an arc-shaped sliding rod, and a spring. One end of the first scale is connected to the first left sleeve, and the other end of the first scale is connected to the first right sleeve. The second scale is adapted to the first right sleeve, and the second scale passes through the first right sleeve and is inserted into the first scale. The second scale slides within the first scale and is connected to the second scale side sleeve. The third scale is adapted to the second scale side sleeve, and the third scale passes through the second scale side sleeve and is inserted into the second scale. The third scale slides within the second scale and is connected to the third scale side sleeve on its side. The first, second, and third scales are of the same length.

[0006] The lower part of the rectangular support sleeve has a rectangular support plate. The first left sleeve is adapted to the rectangular support sleeve and is inserted into the rectangular support sleeve. The second scale side sleeve is connected to the second side connecting ear on the side. The first right sleeve is connected to the first side connecting ear on the side. The rotating pressure plate has a pressure plate middle sleeve. The upper and lower sides of the pressure plate middle sleeve are in contact with a set of first side connecting ears. The pressure plate middle sleeve is connected to a set of first side connecting ears through a rotating shaft.

[0007] The rotating pressure plate is symmetrically arranged on the front and rear sides of the No. 1 right sleeve. The upper and lower sides of the middle sleeve of the pressure plate are in contact with a set of No. 2 side connecting ears. The middle sleeve of the pressure plate is connected to a set of No. 2 side connecting ears through a rotating shaft. The rotating pressure plate is symmetrically arranged at the front and rear ends of the No. 2 scale side sleeve.

[0008] The rotating pressure plate has a pressure plate side plate. The side of the second scale is in contact with the pressure plate side plate, and the side of the third scale is in contact with the pressure plate side plate. The arc-shaped slide rod is connected to the first right sleeve. The rotating pressure plate has a pressure plate inner hole. The arc-shaped slide rod passes through the pressure plate inner hole and slides in the pressure plate inner hole. The spring is sleeved on the arc-shaped slide rod. One end of the spring is in contact with the first right sleeve, and the other end of the spring is in contact with the rotating pressure plate. Beneficial effects

[0009] 1. In this utility model, the No. 2 ruler passes through the right side sleeve of the No. 1 ruler and is inserted into the No. 1 ruler, so that the No. 2 ruler and the No. 1 ruler form a telescopic ruler. The No. 3 ruler passes through the side sleeve of the No. 2 ruler and is inserted into the No. 2 ruler, so that the No. 1 ruler, the No. 2 ruler and the No. 3 ruler form a three-section telescopic ruler. This three-section telescopic structure of the ruler is easy to store. When in use, the No. 2 ruler and the No. 3 ruler can be pulled out. The measuring dimension of each section of the ruler is one meter, and the measuring dimension of the whole ruler is three meters. When measuring length, the ruler is used horizontally. When measuring height, the ruler is used vertically to prevent the ruler from tilting in geographic surveying.

[0010] 2. In this utility model, the left side sleeve of the first model is inserted into the rectangular support sleeve. The rectangular support plate has a large area to ensure the verticality of the scale and prevent it from tipping over during geographic surveying. The middle sleeve of the pressure plate is connected to the connecting ear of the first side through a rotating shaft, so that the rotating pressure plate is installed on the side of the right side sleeve of the first model and can rotate. The arc-shaped sliding rod is installed and fixed on the side of the right side sleeve of the first model. The spring is sleeved on the arc-shaped sliding rod. The spring applies a pushing force to the rotating pressure plate with the right side sleeve of the first model as support, so that the rotating pressure plate rotates. In turn, the symmetrical pressure plate side plates clamp the second scale, ensuring the extension length between the first and second scales. The two sets of rotating pressure plates are respectively installed at both ends of the right side sleeve of the first model and the side sleeve of the second scale to control the extension and retraction of the entire scale. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of a scale structure for geographic surveying according to the present invention.

[0012] Figure 2 This is a partial sectional view of a geographic surveying ruler according to the present invention.

[0013] Figure 3 This is a schematic diagram of the No. 1 scale structure described in this utility model.

[0014] Figure 4 This is a schematic diagram of the No. 2 scale structure described in this utility model.

[0015] Figure 5 This is a schematic diagram of the No. 3 scale structure described in this utility model.

[0016] Figure 6 This is a schematic diagram of the rectangular support plate structure described in this utility model.

[0017] Figure 7 This is a schematic diagram of the rotating pressure plate structure described in this utility model. Detailed Implementation

[0018] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments:

[0019] Example 1:

[0020] A geographic surveying scale includes a first scale 01, a first left side sleeve 02, a first right side sleeve 03, a second scale 05, a second scale side sleeve 06, a third scale 08, a third scale side sleeve 09, a rectangular support sleeve 11, a rotating pressure plate 12, an arc-shaped sliding rod 15, and a spring 16. One end of the first scale 01 is connected to the first left side sleeve 02, and the other end of the first scale 01 is connected to the first right side sleeve 03. The second scale 05 is adapted to the first right side sleeve 03. The second scale 05 passes through the first right side sleeve 03 and is inserted into the first scale 01, so that the second scale 05 and the first scale 01 form a telescopic scale. The second scale 05 slides within the first scale 01. The second scale 05 is connected to the second scale side sleeve. Set 06, Ruler 08 of size 3 is adapted to Ruler 06 of size 2. Ruler 08 of size 3 passes through Ruler 06 of size 2 and is inserted into Ruler 05 of size 2. Ruler 08 of size 3 slides inside Ruler 05 of size 2. Ruler 08 of size 3 is connected to Ruler 09 of size 3 on the side. Ruler 01 of size 1, Ruler 05 of size 2, and Ruler 08 of size 3 are of the same length, so that Ruler 01 of size 1, Ruler 05 of size 2, and Ruler 08 of size 3 form a three-section telescopic ruler. This ruler is designed with this three-section telescopic structure for easy storage. When in use, Ruler 05 of size 2 and Ruler 08 of size 3 are pulled out. The measuring dimension of each section of the ruler is one meter, and the measuring dimension of the whole ruler is three meters. The ruler is used horizontally when measuring length.

[0021] Example 2:

[0022] The rectangular support sleeve 11 of this utility model has a rectangular support plate 10 at its lower part. The first left sleeve 02 is adapted to the rectangular support sleeve 11 and is inserted into the rectangular support sleeve 11. When measuring height, the ruler is used upright. In order to prevent the ruler from tilting in geographic surveying, the first left sleeve 02 is inserted into the rectangular support sleeve 11. The rectangular support plate 10 has a large area to ensure the vertical state of the ruler and prevent it from tipping over in geographic surveying. The second ruler side sleeve 06 is connected to the second side connecting ear 07 on its side. The first right sleeve 03 is connected to the first side connecting ear 04 on its side. The rotating pressure plate 12 has a pressure plate middle sleeve 17. The upper and lower sides of the pressure plate middle sleeve 17 are in contact with a set of first side connecting ears 04. The pressure plate middle sleeve 17 is connected to a set of first side connecting ears 04 through a rotating shaft 18.

[0023] Example 3:

[0024] The rotating pressure plate 12 of this utility model is symmetrically arranged on the front and rear sides of the first right sleeve 03. The upper and lower sides of the middle sleeve 17 of the pressure plate are in contact with a set of second side connecting ears 07. The middle sleeve 17 of the pressure plate is connected to a set of second side connecting ears 07 through a rotating shaft 18, so that the rotating pressure plate 12 is installed on the side of the first right sleeve 03 and can rotate. The rotating pressure plate 12 is symmetrically arranged at the front and rear ends of the second scale side sleeve 06.

[0025] Example 4:

[0026] The rotating pressure plate 12 of this utility model has a pressure plate side plate 13 on its side. The side of the second scale 05 is in contact with the pressure plate side plate 13, and the side of the third scale 08 is in contact with the pressure plate side plate 13. An arc-shaped slide rod 15 is connected to the first right sleeve 03 and is fixedly installed on the side of the first right sleeve 03. The rotating pressure plate 12 has a pressure plate inner hole 14, through which the arc-shaped slide rod 15 passes and slides within the pressure plate inner hole 14. A spring 16 is sleeved on the arc-shaped slide rod 15, and one end of the spring 16 is connected to a... The right side sleeve 03 is attached to the first one, and the other end of the spring 16 is attached to the rotating pressure plate 12. The spring 16 is sleeved on the arc-shaped slide rod 15. The spring 16 applies a pushing force to the rotating pressure plate 12 with the right side sleeve 03 as support, causing the rotating pressure plate 12 to rotate. This causes the symmetrical pressure plate side plate 13 to clamp the second scale 05, ensuring the extension length between the first scale 01 and the second scale 05. The two sets of rotating pressure plates 12 are respectively installed at both ends of the right side sleeve 03 and the second scale side sleeve 06 to control the extension and retraction of the entire scale.

[0027] Example 5:

[0028] The installation steps of this utility model are as follows: First, connect the two ends of the first ruler 01 to the first left sleeve 02 and the first side connecting ear 04 respectively. Connect the second ruler 05 to the second ruler side sleeve 06. Connect the third ruler 08 to the third ruler side sleeve 09. Insert the second ruler 05 through the first right sleeve 03 into the first ruler 01. Insert the third ruler 08 through the second ruler side sleeve 06 into the second ruler 05. Connect the first side connecting ear 04 to the first right sleeve 03. Connect the second side connecting ear 07 to the second ruler side sleeve 06. Connect the middle sleeve 17 of the pressure plate to the first side connecting ear 04 through the rotating shaft 18. Connect the middle sleeve 17 of the pressure plate to the second side connecting ear 07 through the rotating shaft 18. Pass the arc-shaped slide rod 15 through the inner hole 14 of the pressure plate. Sleeve the spring 16 on the arc-shaped slide rod 15. Connect the arc-shaped slide rod 15 to the first right sleeve 03.

[0029] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A scale for use in geoplotting, characterized in that :Including a ruler (01), a left sleeve (02), a right sleeve (01), a ruler (05), a ruler (06), a ruler (08), a ruler (09), a rectangular support sleeve (11), a rotating pressure plate (12), an arc-shaped slide rod (15), a spring (16), the one end of the ruler (01) is connected with the left sleeve (02), the other end of the ruler (01) is connected with the right sleeve (03), the ruler (05) is adapted to the right sleeve (03), the ruler (05) is inserted into the ruler (01) through the right sleeve (03), the ruler (05) slides in the ruler (01), the ruler (05) is connected with the ruler (06), the ruler (08) is adapted to the ruler (06), the ruler (08) is inserted into the ruler (05) through the ruler (06), the ruler (08) slides in the ruler (05), the side of the ruler (08) is connected with the ruler (09), the length of the ruler (01), the ruler (05) and the ruler (08) is same.

2. A scale for use in geoplotting according to claim 1, wherein :The lower part of the rectangular support sleeve (11) has a rectangular support plate (10), the left sleeve (02) is adapted to the rectangular support sleeve (11), the left sleeve (02) is inserted into the rectangular support sleeve (11), the side of the ruler (06) is connected with the second side connecting lug (07), the side of the right sleeve (03) is connected with the first side connecting lug (04), the rotating pressure plate (12) has a pressure plate middle sleeve (17), the upper and lower sides of the pressure plate middle sleeve (17) are fitted with a group of first side connecting lugs (04), the pressure plate middle sleeve (17) is connected with a group of first side connecting lugs (04) through the rotating shaft (18).

3. A scale for use in geoplotting according to claim 2, wherein :The rotating pressure plate (12) is symmetrically arranged on the front and back sides of the right sleeve (03), the upper and lower sides of the pressure plate middle sleeve (17) are fitted with a group of second side connecting lugs (07), the pressure plate middle sleeve (17) is connected with a group of second side connecting lugs (07) through the rotating shaft (18), the rotating pressure plate (12) is symmetrically arranged on the front and back ends of the ruler (06).

4. A scale according to claim 3, wherein :The side of the rotating pressure plate (12) has a pressure plate side plate (13), the side of the ruler (05) is fitted with the pressure plate side plate (13), the side of the ruler (08) is fitted with the pressure plate side plate (13), the arc-shaped slide rod (15) is connected with the right sleeve (03), the rotating pressure plate (12) has a pressure plate inner hole (14).

5. A scale for use in geoplotting according to claim 2, wherein :The arc-shaped slide rod (15) passes through the pressure plate inner hole (14), the arc-shaped slide rod (15) slides in the pressure plate inner hole (14), the spring (16) is sleeved on the arc-shaped slide rod (15), one end of the spring (16) is fitted with the right sleeve (03), the other end of the spring (16) is fitted with the rotating pressure plate (12).

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