A portable level shade

Abstract

This utility model belongs to the field of light-shielding technology, specifically disclosing a portable leveling instrument light-shielding device, including a fixed plate, a light-shielding plate, and multiple connecting rods for connecting the fixed plate and the light-shielding plate; the fixed plate has a through hole in its center for fasteners to pass through, so as to fix the fixed plate between the leveling instrument and its support; each connecting rod includes a telescopic joint and a pivot joint, one end of the telescopic joint is hinged to the first surface of the fixed plate through a pivot joint, and the other end is connected to one end of the pivot joint through a hinge shaft; the other end of the pivot joint is detachably connected to the light-shielding plate; the light-shielding plate is provided with multiple connecting parts that match the pivot joint. This utility model adopts a three-part structural design of fixed plate, light-shielding plate and adjustable connecting rods, which is easy to install and disassemble. The connecting rods can be precisely adjusted at multiple angles through the combination of telescopic joints and pivot joints to adapt to levels of different sizes, meet various light-shielding angle requirements, and have strong versatility.

Description

Technical Field

[0001] This utility model discloses a portable level instrument light-shielding device, belonging to the field of light-shielding technology. Background Technology

[0002] In the field of precision leveling, the national mandatory standards GB / T 12897-2006 and GB / T 12898-2009 clearly stipulate that "when setting up a station, a measuring umbrella should be used to shield it from sunlight, and when moving a station, an instrument cover should be used." The core of this requirement is to eliminate the systematic interference of solar radiation on the observation accuracy of electronic levels. In actual surveying operations, without shading measures, changes in the internal temperature gradient of the instrument can cause a line-of-sight offset of 0.5″-1.5″, resulting in a cumulative elevation error of 2-5 mm over a kilometer measurement distance, significantly exceeding the limit requirement of ≤1.0 mm for accidental mean square error per kilometer in second-order leveling.

[0003] Currently, the industry commonly uses manual umbrellas for shading, which suffers from high labor costs, low operational reliability, and limited work efficiency. In addition, some products use shading devices fixed to the top of the instrument, but these are bulky, inconvenient to carry, and lack versatility in their structural design, making them difficult to adapt to different models of level instruments and thus having poor applicability in actual field surveying. Utility Model Content

[0004] This utility model overcomes the shortcomings of the prior art and proposes a portable leveling instrument light-shielding device, including: a fixed plate, a light-shielding plate, and multiple connecting rods for connecting the fixed plate and the light-shielding plate;

[0005] The fixing plate has a through hole at its center, which is used to insert a fastener to fix the fixing plate between the level and its support.

[0006] Each of the connecting rods includes a telescopic joint and a pivot joint. One end of the telescopic joint is hinged to the first surface of the fixed plate via a pivot joint, and the other end is connected to one end of the pivot joint via a hinge shaft.

[0007] The other end of the pivot joint is detachably connected to the light-shielding plate;

[0008] The light-shielding plate is provided with multiple connectors that match the pivot joint.

[0009] Preferably, the rotation range of the rotating shaft is 0°~180°, used to rotate the telescopic joint to a preset angle with the fixed plate or to attach it to the first surface of the fixed plate.

[0010] Preferably, the expansion joint includes an inner sleeve and an outer sleeve;

[0011] The first end of the outer sleeve is fixedly connected to the first surface of the fixing plate;

[0012] The first end of the inner sleeve is connected to the pivot joint, and the second end is slidably inserted into the outer sleeve;

[0013] The inner sleeve and the outer sleeve are fixed in relative position by locking bolts.

[0014] Preferably, the sidewall of the outer sleeve is provided with a threaded through hole;

[0015] The locking bolt passes through the threaded through hole and tightens against the inner sleeve.

[0016] Preferably, the connector includes a through hole and a locking assembly disposed on the light shield;

[0017] The other end of the connecting rod is provided with an axial limiting structure that mates with the through hole, and the locking assembly is used to radially fix the end of the connecting rod that passes through the through hole.

[0018] Preferably, the rotating shaft and the hinge shaft are damped.

[0019] Preferably, both the light-shielding plate and the fixing plate are disc structures.

[0020] Preferably, the light-shielding plate is a solar panel used to provide electrical power to the level.

[0021] Compared with existing technologies, the advantages of this utility model are as follows: This utility model adopts a three-part structural design consisting of a fixed plate, a light-shielding plate, and an adjustable connecting rod. Installation and disassembly are simple. The connecting rod achieves precise multi-angle adjustment through a combination of telescopic joints and rotating shafts. The overall structure is compact and easy to carry. The telescopic joint length can be adjusted without limitation to accommodate different sized levels. The rotating shaft's 0°-180° rotation range meets various light-shielding angle requirements. Independent adjustment of the hinge shaft ensures stable connection of the light-shielding plate. The detachable design facilitates maintenance and replacement. The damped rotating shaft prevents accidental movement. The disc structure ensures uniform light shading. An optional solar panel provides auxiliary power. The threaded connection is firm and reliable, and the locking bolt fixing method offers high adjustment accuracy. The structure is simple, the manufacturing cost is low, it is reusable and highly versatile, and it is compatible with various level models. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the light-shielding device of this utility model;

[0023] Figure 2 This is a top view of the light-shielding plate in an embodiment of this utility model;

[0024] Figure 3 This is a schematic diagram of the overall structure of the connecting rod and fixing plate in an embodiment of this utility model;

[0025] Figure 4 This is a side view of the connecting rod and fixing plate in an embodiment of this utility model.

[0026] In the diagram: 1. Sunshade plate; 1-1. Connector; 2. Fixing plate; 3. Connecting rod; 4. External thread section; 5. Hinge shaft; 6. Rotating shaft. Detailed Implementation

[0027] The technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0028] Please see Figure 1 As shown, the purpose of this embodiment is to provide a portable level instrument light-shielding device, including: a fixing plate 2, a light-shielding plate 1, and multiple connecting rods 3 for connecting the fixing plate 2 and the light-shielding plate 1;

[0029] The fixing plate 2 has a through hole at its center for fasteners to pass through, thereby fixing the fixing plate 2 between the level and its support. Each connecting rod 3 includes a telescopic joint and a pivot joint. One end of the telescopic joint is hinged to the first surface of the fixing plate 2 via a pivot joint 6, and the other end is connected to one end of the pivot joint via a hinge shaft 5. The axis of the hinge shaft 5 is perpendicular to the telescopic direction of the telescopic joint. The other end of the pivot joint is detachably connected to the light-shielding plate 1. The light-shielding plate 1 is provided with a plurality of connectors 1-1 that match the pivot joint.

[0030] In one embodiment, such as Figure 3 As shown, there are 3 connecting rods 3, but 4, 5, or 6 can also be selected. One end of each connecting rod 3 is evenly distributed around the edge of the fixing plate 2, and the other end is detachably connected to the light-shielding plate 1 via a pivot joint, and is evenly distributed around the light-shielding plate 1. Correspondingly, the number of connecting parts 1-1 provided on the light-shielding plate 1 is the same as the number of connecting rods 3, and the position of each connecting part 1-1 matches the corresponding pivot joint mounting position on the fixing plate 2.

[0031] Furthermore, the rotation range of the rotating shaft 6 is 0°~180°, which is used to rotate the telescopic joint to form a preset angle with the fixing plate 2 or to attach it to the first surface of the fixing plate 2.

[0032] In one embodiment, when the rotating shaft 6 rotates to 0°, the telescopic joint is attached to the first surface of the fixed plate 2. At this time, the rotating shaft can be rotated parallel to the telescopic joint via the hinge shaft 5, so that the entire connecting rod 3 is stored to one side of the fixed plate 2; at the same time, the light-shielding plate 1 separates from it, and the entire device is in a retractable state. When the rotating shaft 6 rotates to other angles (other than 0°), the telescopic joint and the fixed plate 2 are spread apart at an angle, and the other end of the connecting rod 3 can be connected to the light-shielding plate 1, activating the light-shielding device.

[0033] When using the light-shielding device, the operation may be affected if the area of ​​the fixed plate 2 is too large due to the different models and sizes of level instruments. To avoid insufficient space between the connecting rods 3 to accommodate level instruments of different sizes, the light-shielding device of this invention provides adjustment capability through the telescopic joint and the pivot joint: by adjusting the angle between the telescopic joint and the fixed plate 2, the size of the space formed by the connecting rods 3 can be adjusted to accommodate the size of the level instrument; in addition, by adjusting the angle of the pivot joint through the hinge shaft 5, it can be ensured that its connection with the light-shielding plate 1 is not affected by the change of the angle between the telescopic joint and the fixed plate 2.

[0034] Furthermore, the expansion joint includes an inner sleeve and an outer sleeve; the first end of the outer sleeve is fixedly connected to the first surface of the fixing plate 2; the first end of the inner sleeve is connected to the rotating shaft joint, and the second end is slidably inserted into the outer sleeve; the inner sleeve and the outer sleeve are fixed in relative position by locking bolts.

[0035] In one embodiment, when the expansion joint adopts a sliding and relatively fixed telescopic sleeve structure, the shading device can flexibly adjust the posture of the shading plate 1 by adjusting the telescopic length of the expansion joint and the rotation angle of the rotating shaft 6 and the hinge shaft 5. For example, by lengthening the length of one side of the expansion joint while keeping the length of the opposite side unchanged, the shading plate 1 can be tilted. In actual use, operators can use this adjustment function to change the tilt direction and angle of the shading plate 1 according to the solar azimuth angle to achieve the best shading effect.

[0036] Furthermore, the outer sleeve has a threaded through hole on its side wall; the locking bolt passes through the threaded through hole and tightens against the inner sleeve.

[0037] In one embodiment, the relative positions of the inner sleeve and outer sleeve of the expansion joint are fixed by a locking bolt passing through a threaded hole in the outer sleeve wall and pressing against the inner sleeve. In other possible embodiments, a snap-fit ​​mechanism similar to an umbrella pole structure can also be used for fixing. The bolt tightening scheme used in this embodiment allows for arbitrary stepless adjustment of the expansion joint length, avoiding the limitation on the selection of the expansion length due to preset locking positions in snap-fit ​​structures.

[0038] Furthermore, such as Figure 2 and Figure 4As shown, the connector 1-1 includes a through hole and a locking assembly on the light shield 1; the other end of the connecting rod 3 is provided with an axial limiting structure that cooperates with the through hole, and the locking assembly is used to radially fix the end of the connecting rod 3 that passes through the through hole.

[0039] In one embodiment, the through hole is a smooth hole, and the end of the pivot joint of the connecting rod 3 is provided with an externally threaded section 4. The locking assembly is a matching nut, and the externally threaded section 4 is locked and fixed by the nut after passing through the through hole. In another embodiment, the through hole can also be a stepped hole, and the end of the pivot joint of the connecting rod 3 is provided with a shoulder or a retaining ring groove. The locking assembly is a retaining ring or an elastic retaining ring. During assembly, the shoulder or retaining ring is embedded in the stepped hole to achieve axial limitation. In yet another embodiment, the locking assembly is a quick-release pin, and the end of the pivot joint of the connecting rod 3 is provided with a radial pin hole. The quick-release pin passes through the pin hole and the through hole to achieve quick locking.

[0040] Specifically, when using a nut locking method, an anti-loosening washer or elastic washer is provided between the nut and the light-shielding plate 1 to enhance connection stability. The diameter of the through hole is slightly larger than the outer diameter of the end of the connecting rod 3, making it easy to adjust the angle of the light-shielding plate 1 before locking it in place.

[0041] Furthermore, the rotating shaft 6 and the hinge shaft 5 are damped.

[0042] To prevent the rotation of the hinge 6 and the hinge axis 5 from being too smooth and changing due to external environmental disturbances during use, the hinge 6 of this application is a damped hinge, and the hinge axis 5 is also damped. During use, this restricts the free rotation of the hinge 6 or the hinge axis 5. This technology is commonly used at the connection between the screen and the motherboard of a laptop computer. This is prior art.

[0043] Furthermore, both the light-shielding plate 1 and the fixing plate 2 are disc structures.

[0044] The circular structure of the fixing plate 2 and the light-shielding plate 1, together with the circumferentially evenly distributed connecting rods 3, has greater advantages in terms of space utilization and structural symmetry.

[0045] Furthermore, the light-shielding plate 1 is a solar panel used to provide electrical energy to the level instrument.

[0046] In one embodiment, to avoid difficulties in replenishing power for the level instrument during field operations, the light-shielding plate 1 can be designed as a composite plate with an integrated solar panel on its upper surface to supply power to the level instrument or the operators. In this case, the connector 1-1 can be implemented using a nut welded to the lower surface of the light-shielding plate 1.

[0047] This utility model adopts a three-part structure consisting of a fixed plate 2, a light-shielding plate 1, and an adjustable connecting rod 3, which makes installation and disassembly simple. The connecting rod 3 adopts a combination design of telescopic joint and pivot joint, which can realize multi-angle adjustment. The overall structure is compact, small in size when stored, and easy to carry.

[0048] The length of the telescopic joint of this utility model can be adjusted without limitation to adapt to different sizes of level instruments; the rotation range of the rotating shaft 6 is 0°-180° to meet various shading angle requirements; the hinge shaft 5 can be adjusted independently to ensure the stable connection of the shading plate 1.

[0049] This utility model features a detachable design for easy maintenance and component replacement, a damped rotating shaft to prevent accidental movement and ensure operational stability, a symmetrical disc structure for uniform shading, an optional solar panel design to provide auxiliary power to the equipment, a secure and reliable threaded connection for easy assembly and disassembly, and a high-precision locking bolt method for easy adjustment.

[0050] This utility model has a simple structure and low manufacturing cost; it is reusable and has a long service life; it is highly versatile and compatible with various level instrument models.

[0051] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A portable leveling instrument light-shielding device, characterized in that, include: A fixing plate, a light-shielding plate, and multiple connecting rods for connecting the fixing plate and the light-shielding plate; The fixing plate has a through hole at its center, which is used to insert a fastener to fix the fixing plate between the level and its support. Each of the connecting rods includes a telescopic joint and a pivot joint. One end of the telescopic joint is hinged to the first surface of the fixed plate via a pivot joint, and the other end is connected to one end of the pivot joint via a hinge shaft. The other end of the pivot joint is detachably connected to the light-shielding plate; The light-shielding plate is provided with multiple connectors that match the pivot joint.

2. The portable leveling instrument light-shielding device according to claim 1, characterized in that, The rotation range of the rotating shaft is 0°~180°, and it is used to rotate the telescopic joint to a preset angle with the fixed plate or to attach it to the first surface of the fixed plate.

3. The portable leveling instrument light-shielding device according to claim 1, characterized in that, The expansion joint includes an inner sleeve and an outer sleeve; The first end of the outer sleeve is fixedly connected to the first surface of the fixing plate; The first end of the inner sleeve is connected to the pivot joint, and the second end is slidably inserted into the outer sleeve; The inner sleeve and the outer sleeve are fixed in relative position by locking bolts.

4. The portable leveling instrument light-shielding device according to claim 3, characterized in that, The outer sleeve has threaded through holes on its side wall; The locking bolt passes through the threaded through hole and tightens against the inner sleeve.

5. The portable leveling instrument light-shielding device according to claim 1, characterized in that, The connector includes a through hole and a locking assembly provided on the light shield; The other end of the connecting rod is provided with an axial limiting structure that mates with the through hole, and the locking assembly is used to radially fix the end of the connecting rod that passes through the through hole.

6. The portable leveling instrument light-shielding device according to claim 1, characterized in that, The rotating shaft and hinge shaft are damped.

7. The portable leveling instrument light-shielding device according to claim 1, characterized in that, Both the light-shielding plate and the fixing plate are disc structures.

8. The portable leveling instrument light-shielding device according to claim 1, characterized in that, The light-shielding plate is a solar panel used to provide power to the level instrument.

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