Level gauge for land surveying and mapping

Abstract

The utility model discloses a level gauge for land surveying and mapping, which comprises a level gauge main body, an objective lens assembly is arranged on one side of the level gauge main body, an auxiliary assembly is arranged on the lower side of the objective lens assembly, the objective lens assembly comprises an objective lens barrel and a mounting cover, the objective lens barrel is arranged on the level gauge main body, and the mounting cover is arranged on the outer side of the objective lens barrel. According to the utility model, when the objective lens is replaced, the baffle plate can be inserted into the insertion hole, so that the baffle plate is utilized to seal the opening of the objective lens barrel, and the objective lens can be conveniently replaced. And dust in the external environment is prevented from penetrating through the objective lens cone to enter the level gauge to influence the measurement precision of the level gauge in the process of replacing the objective lens.

Description

Technical Field

[0001] The utility model relates to a level for land surveying and mapping. Background Art

[0002] A level is an instrument for establishing a horizontal line of sight to measure the height difference between two points on the ground. It is a commonly used instrument in land surveying and mapping. During the use of the level, the objective lens with a larger lens diameter has a larger contact area with the external environment, which inevitably causes scratches and wear on the objective lens. In this case, the objective lens needs to be removed from the level for replacement. However, when many existing levels are removed for replacement, the objective lens barrel is in an open state without the obstruction of the lens, which causes dust in the external environment to easily pass through the barrel and enter the level, resulting in the measurement accuracy of the level being affected. Therefore, it is necessary to develop a level for land surveying and mapping to solve the above problems. Utility Model Content

[0003] The purpose of the utility model is to provide a level for land surveying and mapping to solve the problems raised in the above-mentioned background technology.

[0004] In order to solve the above problems, the utility model adopts the following technical solutions:

[0005] A level for land surveying and mapping comprises a level body, an objective lens assembly is arranged on one side of the level body, an auxiliary assembly is arranged on the lower side of the objective lens assembly, the objective lens assembly comprises an objective lens barrel and a mounting cover, the objective lens barrel is arranged on the level body, the mounting cover is arranged on the outer side of the objective lens barrel, the mounting cover is connected to the level body by bolts, a light-through circular hole is arranged on one side surface of the mounting cover, an inner lens barrel is arranged on the inner side of the objective lens barrel, the inner lens barrel is fixedly connected to the mounting cover, an objective lens is arranged on the inner side of the inner lens barrel, a strip groove and a socket are arranged on the top of the objective lens barrel, the strip groove is arranged on the upper side of the socket, and the strip groove is connected to the socket.

[0006] Preferably, a mounting tube and a mounting ring are respectively provided on both sides of the objective lens, the mounting tube is connected to the inner lens tube by bolts, and the mounting ring is fixed in the inner lens tube.

[0007] Preferably, the auxiliary component includes a storage box and a baffle, the storage box is fixed on the level main body, the baffle is slidably arranged in the storage box, one end of the baffle is connected to a magnet plate, and a pull ring is fixed to one side of the magnet plate.

[0008] Preferably, a rubber sealing pad is provided in the strip groove, and a through hole corresponding to the plug hole is provided on the rubber sealing pad.

[0009] Preferably, rubber sheets are provided on both upper and lower sides of the mounting cover, and the rubber sheets are fixed on the side walls of the mounting cover.

[0010] The beneficial effect of the utility model is that when the objective lens is replaced, the baffle can be inserted into the insertion hole, so that the opening of the objective lens barrel is sealed by the baffle, so as to prevent dust in the external environment from passing through the objective lens barrel and entering the interior of the level during the process of replacing the objective lens and affecting the measurement accuracy of the level. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below, but this does not limit the protection scope of the utility model.

[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0013] Figure 2 For this utility model Figure 1 A schematic diagram of the structure of the objective lens assembly;

[0014] Figure 3 For this utility model Figure 2 The enlarged schematic diagram at A in the middle;

[0015] Figure 4 For this utility model Figure 2 Schematic diagram of the structure at the middle BB;

[0016] Figure 5 For this utility model Figure 1 Schematic diagram of the structure of auxiliary components.

[0017] In the figure: 11, level instrument body; 12, objective lens assembly; 13, auxiliary assembly; 14, objective lens barrel; 15, mounting cover; 16, inner lens barrel; 17, mounting barrel; 18, objective lens; 19, mounting ring; 20, rubber sheet; 21, strip groove; 22, rubber sealing gasket; 23, jack; 24, storage box; 25, baffle; 26, magnet plate; 27, pull ring. DETAILED DESCRIPTION

[0018] See also Figures 1 to 5A level for land surveying shown in the figure comprises a level body 11, an objective lens assembly 12 is arranged on one side of the level body 11, an auxiliary assembly 13 is arranged on the lower side of the objective lens assembly 12, the objective lens assembly 12 comprises an objective lens barrel 14 and a mounting cover 15, the objective lens barrel 14 is arranged on the level body 11, the mounting cover 15 is arranged on the outer side of the objective lens barrel 14, the mounting cover 15 is connected to the level body 11 by bolts, a light-through circular hole is arranged on one side surface of the mounting cover 15, an inner lens barrel 16 is arranged on the inner side of the objective lens barrel 14, the inner lens barrel 16 is fixedly connected to the mounting cover 15, an objective lens lens 18 is arranged on the inner side of the inner lens barrel 16, a strip groove 21 and a socket 23 are arranged on the top of the objective lens barrel 14, the strip groove 21 is arranged On the upper side of the socket 23, the strip groove 21 is connected to the socket 23; the objective lens barrel 14 is a square cylindrical structure, and the inner lens barrel 16 is a square cylindrical structure with a circular through hole. The inner lens barrel 16 fits the inner wall of the objective lens barrel 14, and the diameter of the circular through hole of the inner lens barrel 16 is the same as the diameter of the light-transmitting circular hole on the mounting cover 15; before replacing the objective lens, unscrew the bolts between the mounting cover 15 and the level body 11, and then slide the mounting cover 15 along the objective lens barrel 14 for a distance so that the strip groove 21 is opened. At this time, immediately insert the baffle 25 in the auxiliary component 13 into the socket 23 so that the baffle 25 seals the objective lens barrel 14 to prevent dust in the external environment from entering the level during the replacement process, and then continue to slide the mounting cover 15 to separate the mounting cover 15 from the objective lens barrel 14.

[0019] Furthermore, a mounting tube 17 and a mounting ring 19 are respectively provided on both sides of the objective lens 18, the mounting tube 17 is connected to the inner lens barrel 16 by bolts, and the mounting ring 19 is fixed in the inner lens barrel 16; the objective lens 18 is sandwiched between the mounting tube 17 and the mounting ring 19, so as to achieve stable installation. When disassembling, unscrew the bolts between the mounting tube 17 and the inner lens barrel 16, pull the mounting tube 17 out of the inner lens barrel 16, and then the objective lens 18 can be removed from the inner lens barrel 16.

[0020] Furthermore, the auxiliary component 13 includes a storage box 24 and a baffle 25. The storage box 24 is fixed on the level body 11, and the baffle 25 is slidably set in the storage box 24. One end of the baffle 25 is connected to a magnet plate 26, and a pull ring 27 is fixed to one side of the magnet plate 26; the storage box 24 is made of carbon steel, and the magnet plate 26 utilizes magnetic force to adsorb to the storage box 24, so that the baffle 25 can be stably inserted in the storage box 24; the baffle 25 is usually stored in the storage box 24. When sealing the objective lens barrel 14, hold the pull ring 27 to pull the baffle 25 out of the storage box 24, and then insert the baffle 25 into the socket 23.

[0021] Furthermore, a rubber sealing pad 22 is provided in the strip groove 21, and a through hole corresponding to the socket 23 is provided on the rubber sealing pad 22; when the baffle 25 is inserted into the socket 23, the baffle 25 passes through the through hole on the rubber sealing pad 22 and enters the socket 23, and the rubber sealing pad 22 can enhance the sealing performance of the connection between the baffle 25 and the socket 23.

[0022] Furthermore, rubber sheets 20 are provided on the upper and lower sides of the mounting cover 15, and the rubber sheets 20 are fixed on the side walls of the mounting cover 15; when removing the mounting cover 15 from the objective lens barrel 14, the rubber sheets 20 on both sides of the mounting cover 15 are pinched and then the mounting cover 15 is pulled, so that the friction between the rubber sheets 20 and the fingers can be used to avoid slipping.

[0023] The working principle of the utility model is that when replacing the objective lens 18, unscrew the bolts between the mounting cover 15 and the level body 11, then pinch the rubber sheets 20 on both sides of the mounting cover 15 to pull the mounting cover 15, so that the mounting cover 15 slides a distance along the objective lens barrel 14, so that the strip groove 21 is opened, at this time, immediately hold the pull ring 27 to pull the baffle 25 out of the storage box 24, and then insert the baffle 25 into the jack 23, so that the baffle 25 seals the opening of the objective lens barrel 14, and then continue to slide the mounting cover 15 to separate the mounting cover 15 from the objective lens barrel 14, then unscrew the bolts between the mounting tube 17 and the inner lens barrel 16, and pull the mounting tube 17 out of the inner lens barrel 16, and then the objective lens 18 can be removed from the inner lens barrel 16 for replacement.

[0024] The above are only specific implementations of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that are not conceived through creative work should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope defined in the claims.

Claims

1. A level for land surveying and mapping, comprising a level main body, characterized in that: An objective lens assembly is provided on one side of the level body, and an auxiliary assembly is provided on the lower side of the objective lens assembly. The objective lens assembly includes an objective lens barrel and a mounting cover. The objective lens barrel is arranged on the level body, and the mounting cover is arranged on the outside of the objective lens barrel. The mounting cover is connected to the level body by bolts, and a light-through circular hole is provided on one side surface of the mounting cover. An inner lens barrel is provided on the inner side of the objective lens barrel, and the inner lens barrel is fixedly connected to the mounting cover. An objective lens is provided on the inner side of the inner lens barrel, and a strip groove and a socket are provided on the top of the objective lens barrel. The strip groove is arranged on the upper side of the socket, and the strip groove is connected to the socket.

2. A level for land surveying and mapping according to claim 1, characterized in that: A mounting tube and a mounting ring are respectively arranged on both sides of the objective lens. The mounting tube is connected to the inner lens tube through bolts, and the mounting ring is fixed in the inner lens tube.

3. A level for land surveying and mapping according to claim 1, characterized in that: The auxiliary component comprises a storage box and a baffle, wherein the storage box is fixed on the level main body, the baffle is slidably arranged in the storage box, one end of the baffle is connected to a magnet plate, and a pull ring is fixed to one side of the magnet plate.

4. A level for land surveying and mapping according to claim 1, characterized in that: A rubber sealing pad is arranged in the strip groove, and a through hole corresponding to the insertion hole is arranged on the rubber sealing pad.

5. A level for land surveying and mapping according to claim 1, characterized in that: The upper and lower sides of the installation cover are both provided with rubber sheets, and the rubber sheets are fixed on the side walls of the installation cover.

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