Magnetic attraction type level gauge

Abstract

The utility model relates to level technology field, concretely is a kind of magnetic attraction type level, including main ruler body, the extension slot is established in the main ruler body one end downside, the extension slot inside upper wall is established in the sliding slot, extension rod is slidably installed in the extension slot interior, this magnetic attraction type level, set up stretch limiting structure between main ruler body and extension rod, the structure is mainly by the transmission core that the rack and pinion engage each other is formed, realizes power transmission by connecting shaft and pivot, just need to rotate adjusting knob, it can drive auxiliary ruler body steady stretch or shrink, and double locking mechanism is set, preliminary fixation is realized by the engagement of rack and pinion on one hand;On the other hand, installation groove is set on the surface of main ruler body, built-in screw cap, when auxiliary ruler body stretches to position, screwing screw cap can make limit rod accurate insertion limit hole, form mechanical interlock, effectively prevent the non-expected retraction of auxiliary ruler body due to spring rebound or external force vibration.

Description

Technical Field

[0001] This utility model relates to the field of spirit level technology, specifically a magnetic spirit level. Background Technology

[0002] A magnetic spirit level is a tool that combines magnetic adsorption with level measurement technology. Its main body is usually made of aluminum alloy or engineering plastic, with a built-in high-precision bubble level or electronic level sensor. Strong magnets are embedded on the side or bottom. When in use, it can be directly adsorbed onto the surface of magnetic materials such as steel, without the need for manual holding and fixing, avoiding the shaking error caused by support. Compared with traditional spirit levels, it not only retains the basic function of judging horizontal and vertical status through the bubble level, but also expands the application scenarios through magnetic adsorption. It is a commonly used tool in modern engineering measurement that combines convenience and reliability.

[0003] A search revealed a Chinese patent (CN216049838U) disclosing a magnetically attached level, comprising a housing 1, a housing 2 on one side of the housing 1, and a telescopic rod connected to one side of the housing 2. The housing 1 has a groove for moving with the telescopic rod, and a magnetic block is connected to one side of the housing 1. A slant ruler, a level ruler, and a vertical ruler are embedded in the inner wall of the housing 1. A clamping assembly is located on one side of the housing 1 near the telescopic rod. With this design, pressing the press plate causes the toothed plate at the bottom of the press plate to rotate the gears on both sides, which in turn cause the gears to move the racks on both sides. The design of the two racks makes the upward movement of the clamping plate smoother and more stable, thus achieving the purpose of convenient measurement for the user.

[0004] The aforementioned magnetic level with dual-scale extension structure mainly achieves the expansion and adjustment of the measurement range through the nested design of the main scale and auxiliary scale, along with the extension component and elastic element. However, in practical applications, it has been found that when the measuring system is fully extended to its maximum working length, the auxiliary scale relies solely on the sliding guide of the extension component and the preload of the spring to maintain its extended state. Under axial loads or vibration conditions, the restoring force of the elastic element causes the auxiliary scale to undergo unexpected axial displacement, retracting into the main scale. This phenomenon affects measurement accuracy and leads to measurement error. Furthermore, during long-distance horizontal measurements, the operator needs to apply additional holding force to maintain the extended state of the measuring scale, which increases operational intensity and affects measurement efficiency. Therefore, a magnetic level is needed. Utility Model Content

[0005] The technical problem to be solved by this application is that when the above-mentioned patent is used, when the measuring system is fully extended to the maximum working length, the auxiliary scale body is kept in an extended state only by the sliding guide of the extension and the preload of the spring. Under axial load or vibration conditions, the restoring force of the elastic element will cause the auxiliary scale body to produce an unexpected axial displacement, causing it to retract into the main scale body. This phenomenon will affect the measurement accuracy and lead to measurement indication error. Furthermore, when performing long-distance horizontal measurements, the operator needs to apply additional holding force to maintain the extended state of the measuring scale, which increases the operational intensity and affects the measurement efficiency.

[0006] To solve the above technical problems, this application provides a magnetic level, including a main body, an extension groove on the lower side of one end of the main body, a sliding groove on the upper inner wall of the extension groove, an extension rod slidably installed inside the extension groove, a slider on one side of the top of the extension rod, the slider being slidably connected to the sliding groove, an auxiliary body on the end of the extension rod away from the slider, and an extension limiting structure between the main body and the extension rod.

[0007] In some embodiments, the extension limiting structure includes racks disposed on both sides of the bottom of the extension rod, and two gears are disposed inside the extension groove. The gears mesh with the racks and are connected by a connecting shaft. One of the gears has a rotating shaft at the end away from the connecting shaft. The rotating shaft passes through the main scale body and has a knob. The outer wall of the knob has several limiting holes. The other gear is rotatably connected to the inner wall of the extension groove at the end away from the connecting shaft.

[0008] In some embodiments, a placement groove is formed on the surface of the main scale body at the knob, the knob is disposed inside the placement groove, and an installation groove is formed on the surface of the main scale body at the upper end of the placement groove. A threaded cap is disposed inside the installation groove, and a limiting rod is disposed at the bottom end of the threaded cap. The limiting rod penetrates the main scale body downward and extends into the placement groove. The outer diameter of the limiting rod matches the inner diameter of the limiting hole.

[0009] In some embodiments, a fixing groove is provided at the top of the main scale body, and an iron sheet is provided on one side inside the fixing groove. The iron sheet is embedded inside the fixing groove and is flush with the bottom of the fixing groove. A horizontal calibration component is provided at the end of the fixing groove away from the iron sheet. The horizontal calibration component is used to enhance the stability of the main scale body and the auxiliary scale body after unfolding.

[0010] In some embodiments, the horizontal calibration component includes a holding plate disposed inside a fixed groove. One end of the holding plate is rotatably connected to the end of the fixed groove away from the iron plate by a rotating component. Magnetic blocks are provided on both sides of the other end of the holding plate, and handles are provided on both sides of the end of the holding plate near the magnetic blocks.

[0011] In some embodiments, a second fixing groove is provided on the top of the auxiliary ruler body, and a second iron sheet is provided on one side inside the second fixing groove. The second iron sheet is embedded inside the second fixing groove and is flush with the bottom of the second fixing groove.

[0012] In some embodiments, the two magnetic blocks are magnetically connected to iron sheet one and iron sheet two respectively in different scenarios.

[0013] This utility model has at least the following beneficial effects:

[0014] 1. In this utility model, an extension limiting structure is set between the main scale body and the extension rod. This structure mainly consists of a transmission core composed of meshing racks and gears. Power transmission is achieved through connecting shafts and rotating shafts. Simply rotating the adjustment knob can drive the auxiliary scale body to extend or retract smoothly. A double locking mechanism is set. On the one hand, the meshing of the gears and racks achieves initial fixation. On the other hand, an installation groove is set on the surface of the main scale body with a built-in threaded cap. When the auxiliary scale body extends to the position, tightening the threaded cap can allow the limiting rod to be accurately inserted into the limiting hole, forming a mechanical interlock, which effectively prevents the auxiliary scale body from unexpectedly retracting due to spring rebound or external force vibration.

[0015] 2. In this utility model, by setting a horizontal calibration component consisting of a holding plate, a magnetic block and a handle on the main scale body and the auxiliary scale body, when the auxiliary scale body and the main scale body are in a separated state, the horizontal calibration component can be taken out from the fixing groove of the main scale body. The holding plate, as the main support component, can provide a stable support plane for the separated main scale body and the auxiliary scale body, avoiding loosening or displacement during use, so that the main scale body and the auxiliary scale body always remain on the same horizontal plane, thereby improving the stability and reliability of the entire scale body structure. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 Schematic diagram of the extension structure of the main scale body and auxiliary scale body of this utility model Figure 1 ;

[0018] Figure 3 Schematic diagram of the extension structure of the main scale body and auxiliary scale body of this utility model Figure 2 ;

[0019] Figure 4 This is a schematic diagram of the unfolded structure of the horizontal calibration component of this utility model;

[0020] Figure 5 This is a schematic diagram of the horizontal calibration component of this utility model installed on the auxiliary ruler body;

[0021] Figure 6 This utility model Figure 3Enlarged schematic diagram of the structure at point A in the middle.

[0022] In the diagram: 1. Main scale body; 11. Extension groove; 12. Slide groove; 13. Placement groove; 14. Mounting groove; 2. Extension rod; 21. Slider; 3. Auxiliary scale body; 31. Fixing groove two; 32. Iron plate two; 4. Extension limiting structure; 41. Rack; 42. Gear; 43. Connecting shaft; 44. Rotating shaft; 45. Knob; 46. Limiting hole; 5. Threaded cap; 51. Limiting rod; 6. Fixing groove one; 61. Iron plate one; 7. Horizontal calibration component; 71. Holding plate; 72. Magnetic block; 73. Handle. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Example 1: Please refer to Figures 1-6 This utility model provides a technical solution: a magnetic level, including a main ruler body 1, an extension groove 11 is provided on the lower side of one end of the main ruler body 1, a sliding groove 12 is provided on the upper inner wall of the extension groove 11, an extension rod 2 is slidably installed inside the extension groove 11, a slider 21 is provided on one side of the top end of the extension rod 2, the slider 21 is slidably connected to the sliding groove 12, an auxiliary ruler body 3 is provided at the end of the extension rod 2 away from the slider 21, and an extension limiting structure 4 is provided between the main ruler body 1 and the extension rod 2.

[0025] The main scale body 1 and the auxiliary scale body 3 are respectively equipped with bubble levels, which is a common existing structure and will not be described in detail here; there is no limitation.

[0026] The main scale body 1 and the auxiliary scale body 3 form a flexible and stable linkage structure through the extension rod 2. The extension rod 2 is precisely fitted into the extension groove 11 of the main scale body 1. The slider 21 set at its top forms a precise sliding fit with the slide groove 12 on the inner wall of the extension groove 11. This embedded sliding design not only ensures the straightness of the extension rod 2 during the extension and retraction process, but also reduces friction loss through the surface contact between the slider 21 and the slide groove 12, thus extending the service life of the component.

[0027] When it is necessary to expand the measurement range, the user can push the auxiliary scale body 3 to drive the extension rod 2 to slide outward along the slide groove 12, so that the auxiliary scale body 3 and the main scale body 1 can be smoothly separated. This separation design can flexibly adjust the overall length according to the size of the object being measured, completely breaking the measurement limitations of the traditional fixed scale body. It is especially suitable for long-distance continuous measurement scenarios of large workpieces, walls or ground, and effectively reduces the cumulative error caused by segmented measurement.

[0028] To ensure structural stability during the extension process, a special extension limiting structure 4 is provided between the main scale body 1 and the extension rod 2. This structure can limit the extension rod 2 after it extends to the preset length, firmly fixing the extension rod 2 in the current position, avoiding measurement interruption or data deviation caused by the unexpected retraction of the extension rod 2, and ensuring that the main scale body 1 and the extension rod 2 always maintain a stable extension state.

[0029] Example 2: Based on Example 1, such as Figures 1-6 As shown, the extension limiting structure 4 includes racks 41 set on both sides of the bottom of the extension rod 2. Two gears 42 are set inside the extension groove 11. Both gears 42 mesh with the racks 41. The two gears 42 are connected by a connecting shaft 43. One end of one gear 42 away from the connecting shaft 43 is provided with a rotating shaft 44. The rotating shaft 44 passes through the main scale body 1 and is provided with a knob 45. Several limiting holes 46 are opened on the outer wall of the knob 45. The other end of the gear 42 away from the connecting shaft 43 is rotatably connected to the inner wall of the extension groove 11.

[0030] In actual operation scenarios, when it is necessary to expand the measurement range, the operator only needs to hold the knob 45 and apply appropriate torque to start the entire transmission system. As a key component of human-computer interaction, the knob 45 has an anti-slip texture design on its surface, which not only improves the comfort of holding it, but also effectively avoids slippage during the application of force, ensuring the accuracy of operation.

[0031] The moment the knob 45 is turned, the internal connecting structure drives the rotating shaft 44 to rotate synchronously, transmitting the rotational force of the knob 45 to the rotating shaft 44. At the same time, the gear 42, which is linked to the rotating shaft 44, also begins to rotate, forming a continuous power transmission chain. The tooth profile of the gear 42 is precisely machined, with uniform tooth spacing and smooth meshing surface.

[0032] Since the rotating shaft 44 and the rack 41 are in a meshing state, when the rotating shaft 44 rotates, the rack 41 will move back and forth on the gear 42 through the interaction between the teeth.

[0033] The rack 41 and the extension rod 2 are rigidly connected. When the rack 41 moves, it will simultaneously drive the extension rod 2 to slide outward along the extension groove 11 on the main scale body 1. The inner wall of the extension groove 11 is finely polished and has a very high degree of matching with the dimensions of the extension rod 2. This not only provides precise guidance for the sliding of the extension rod 2, ensuring that it always moves along a straight trajectory, but also reduces friction between the two, reduces component wear, and extends service life. As the extension rod 2 slides out of the extension groove 11, the auxiliary scale body 3 connected to it gradually moves away from the main scale body 1, achieving a smooth separation between the two.

[0034] Example 3: Based on Example 1, such as Figures 1-6 As shown, a placement groove 13 is provided on the surface of the main scale body 1 at the knob 45. The knob 45 is located inside the placement groove 13. An installation groove 14 is provided on the upper end of the placement groove 13 on the surface of the main scale body 1. A threaded cap 5 is provided inside the installation groove 14. A limit rod 51 is provided at the bottom end of the threaded cap 5. The limit rod 51 penetrates the main scale body 1 downward and extends into the placement groove 13. The outer diameter of the limit rod 51 matches the inner diameter of the limit hole 46.

[0035] The knob 45 is precisely fitted into the placement groove 13 on the surface of the main scale body 1. The mounting groove 14 adjacent to the placement groove 13 is used to install the threaded cap 5. The mounting groove 14 has a reserved clearance in the vertical direction to ensure that the threaded cap 5 can move freely up and down in the axial direction. The limiting rod 51 extending vertically from the bottom of the threaded cap 5 is used for limiting. When the threaded cap 5 moves downward by rotation, the limiting rod 51 passes through the guide hole at the bottom of the mounting groove 14 and is precisely aligned with the limiting hole 46 on the side wall of the knob 45. The limiting hole 46 adopts a tapered inner hole design, which forms a wedge tight fit with the cylindrical limiting rod 51. When the two are fully fitted, they can effectively lock the rotational freedom of the knob 45 and prevent the auxiliary scale body 3 from accidentally retracting due to vibration, accidental touch or other factors.

[0036] Example 4: Based on Example 1, as follows Figures 1-6 As shown, a fixing groove 6 is provided on the top of the main scale body 1. An iron plate 61 is provided on one side inside the fixing groove 6. The iron plate 61 is embedded in the fixing groove 6 and is flush with the bottom of the fixing groove 6. A horizontal calibration component 7 is provided at the end of the fixing groove 6 away from the iron plate 61. The horizontal calibration component 7 is used to enhance the stability of the main scale body 1 and the auxiliary scale body 3 after unfolding.

[0037] The fixing groove 6 on the surface of the main scale body 1 is an embedded rectangular groove structure. Its internal space forms a precise fit with the horizontal calibration component 7. By rotating a rotating part inside one end of the horizontal calibration component 7 and engaging the rotating part with the fixing groove 6, it is ensured that the horizontal calibration component 7 can be stably stored when not in use and can be easily taken out when needed.

[0038] Example 5: Based on Example 1, as follows Figures 1-6 As shown, the horizontal calibration component 7 includes a holding plate 71 disposed inside the fixed groove 6. One end of the holding plate 71 is rotatably connected to the end of the fixed groove 6 away from the iron plate 61 via a rotating component. Magnets 72 are provided on both sides of the other end of the holding plate 71, and handles 73 are provided on both sides of the end of the holding plate 71 near the magnets 72.

[0039] After the main scale body 1 and auxiliary scale body 3 are separated and extended to the required measurement range, the operator can smoothly pull the horizontal calibration component 7 out of the fixing slot 1 6 using the handle 73. During the pulling process, the horizontal calibration component 7 is smoothly removed along a straight line. After being removed, the horizontal calibration component 7 is rotated 180°, at which point the working surface of the holding plate 71 faces the auxiliary scale body 3. Then, it is precisely embedded into the fixing slot 2 31 on the auxiliary scale body 3. The shape and size of the fixing slot 2 31 perfectly match the rotated horizontal calibration component 7. After the horizontal calibration component 7 is installed in place, the flat working surface of the holding plate 71 is flush with the main scale body 1. The measuring reference planes of the main scale body 1 and the auxiliary scale body 3 together form a stable support plane. Through the three-point support principle, the horizontal deviation caused by factors such as assembly gap and material deformation between the main scale body 1 and the auxiliary scale body 3 is effectively compensated. This ensures that the main scale body 1 and the auxiliary scale body 3 always maintain a high degree of horizontal consistency during the measurement process, which significantly improves the accuracy and reliability of the measurement data. After the measurement work is completed, the horizontal calibration component 7 can be taken out from the fixed slot 2 31 and put back into the fixed slot 1 6 by simply pulling the handle 73. The whole operation process is simple and quick, which effectively improves the efficiency of the measuring tool.

[0040] Example 6: Based on Example 1, as follows Figures 1-6 As shown, the top of the auxiliary ruler body 3 is provided with a fixing groove 2 31, and an iron sheet 2 32 is provided on one side inside the fixing groove 2 31. The iron sheet 2 32 is embedded inside the fixing groove 2 31 and is flush with the bottom of the fixing groove 2 31. The two magnetic blocks 72 are magnetically connected to the iron sheet 1 61 and the iron sheet 2 32 respectively in different scenarios.

[0041] The fixing groove 2 31 is provided with iron sheet 2 32, which fixes the horizontal calibration component 7 when it is installed inside the auxiliary ruler body 3.

[0042] Based on the above embodiments, the following is the complete working principle of the above embodiments: In use, the operator can pinch the main scale body 1 and turn the knob 45 on the main scale body 1. The instant the knob 45 is turned, the internal connecting structure drives the rotating shaft 44 to rotate synchronously, transmitting the rotational force of the knob 45 to the rotating shaft 44. Simultaneously, the gear 42, which is linked to the rotating shaft 44, also begins to rotate. Since the rotating shaft 44 and the rack 41 are in a meshing state, when the rotating shaft 44 rotates, the interaction between the teeth drives the rack 41 to move back and forth on the gear 42. The rack 41 and the extension rod 2 are rigidly connected. When the rack 41 moves, it synchronously drives the extension rod 2 to slide outward along the extension groove 11 on the main scale body 1. The inner wall of the extension groove 11 is finely polished and is connected to the extension rod 2. The dimensional matching is extremely high, providing precise guidance for the sliding of the extension rod 2, ensuring that it always moves along a straight trajectory, while reducing friction between the two, reducing component wear, and extending service life. As the extension rod 2 slides out of the extension groove 11, the auxiliary scale body 3 connected to it gradually moves away from the main scale body 1, achieving a smooth separation between the two. Then, the threaded cap 5 is manually turned, causing the threaded cap 5 to drive the limiting rod 51 to rotate until the limiting rod 51 is inserted into the limiting hole 46, thus presenting the final extended and fixed state. Then, the side of the entire scale body with the magnetic block can be attached to the surface of the object to be measured, and by observing the horizontal movement, high-precision horizontal detection and data acquisition of the measured object can be performed. The entire operation process is rigorous and efficient, fully demonstrating the professionalism and reliability of the measuring tool.

[0043] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. A magnetic level, comprising a main body (1), characterized in that: An extension groove (11) is provided on the lower side of one end of the main scale body (1). A sliding groove (12) is provided on the upper inner wall of the extension groove (11). An extension rod (2) is slidably installed inside the extension groove (11). A slider (21) is provided on one side of the top end of the extension rod (2). The slider (21) is slidably connected to the sliding groove (12). An auxiliary scale body (3) is provided at the end of the extension rod (2) away from the slider (21). An extension limiting structure (4) is provided between the main scale body (1) and the extension rod (2).

2. The magnetic level according to claim 1, characterized in that: The extension limiting structure (4) includes racks (41) on both sides of the bottom of the extension rod (2). Two gears (42) are provided inside the extension groove (11). The gears (42) mesh with the racks (41). The two gears (42) are connected by a connecting shaft (43). One of the gears (42) has a rotating shaft (44) at the end away from the connecting shaft (43). The rotating shaft (44) passes through the main scale body (1) and has a knob (45). The outer wall of the knob (45) has several limiting holes (46). The other gear (42) is rotatably connected to the inner wall of the extension groove (11) at the end away from the connecting shaft (43).

3. The magnetic level according to claim 2, characterized in that: The main scale body (1) has a placement groove (13) at the knob (45) on its surface. The knob (45) is located inside the placement groove (13). The main scale body (1) has an installation groove (14) at the upper end of the placement groove (13) on its surface. A threaded cap (5) is provided inside the installation groove (14). A limit rod (51) is provided at the bottom end of the threaded cap (5). The limit rod (51) passes through the main scale body (1) downward and extends into the placement groove (13). The outer diameter of the limit rod (51) matches the inner diameter of the limit hole (46).

4. The magnetic level according to claim 1, characterized in that: The top of the main scale body (1) is provided with a fixing groove (6), and an iron plate (61) is provided on one side inside the fixing groove (6). The iron plate (61) is embedded inside the fixing groove (6) and is flush with the bottom of the fixing groove (6). A horizontal calibration component (7) is provided at the end of the fixing groove (6) away from the iron plate (61). The horizontal calibration component (7) is used to enhance the stability of the main scale body (1) and the auxiliary scale body (3) after unfolding.

5. The magnetic level according to claim 4, characterized in that: The horizontal calibration component (7) includes a holding plate (71) disposed inside the fixed groove (6). One end of the holding plate (71) is rotatably connected to the end of the fixed groove (6) away from the iron plate (61) by a rotating component. Magnets (72) are provided on both sides of the other end of the holding plate (71). Handles (73) are provided on both sides of the end of the holding plate (71) near the magnets (72).

6. The magnetic level according to claim 1, characterized in that: The top of the auxiliary ruler body (3) is provided with a fixing groove 2 (31), and an iron sheet 2 (32) is provided on one side inside the fixing groove 2 (31). The iron sheet 2 (32) is embedded inside the fixing groove 2 (31) and is flush with the bottom of the fixing groove 2 (31).

7. The magnetic level according to claim 5, characterized in that: The two magnetic blocks (72) are magnetically connected to iron sheet one (61) and iron sheet two (32) respectively in different scenarios.

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