Adjustable bubble level
By setting an offset circular boss and a single scale line on the bubble level, the problem of insufficient accuracy of existing levels during gun sight leveling is solved, achieving a fast and accurate leveling effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGZHOU TUOFENG INNOVATION TECHNOLOGY CO LTD
- Filing Date
- 2025-05-27
- Publication Date
- 2026-05-12
Smart Images

Figure CN224230847U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of level technology, and in particular to an adjustable bubble level. Background Technology
[0002] Before using a firearm's scope, a level is needed to align it. There are levels available on the market that are either separate from or integrated with the scope mount to help the shooter align the weapon. However, some levels are installed directly into the scope mount without prior adjustment, leading to inaccuracies. Others are ordinary double-line levels, which require the bubble level to be centered between the two lines before leaving the factory. However, manufacturing errors in the bubble level tube itself can result in inconsistent bubble sizes, causing variations in the distance between the bubble edge and the lines. Furthermore, when adjusting visually, left-right tilting can cause parallax, making adjustments prone to error. Therefore, existing levels suffer from insufficient horizontal accuracy, inability to quickly determine horizontal position, and difficulty in accurate adjustment during use. Utility Model Content
[0003] This utility model aims to solve the technical problems in the prior art mentioned above, and proposes an adjustable bubble level that can quickly position the level by adjustment. The adjustment method is simple and the accuracy is accurate. The specific technical solution is as follows:
[0004] An adjustable bubble level includes: a cylindrical body with a first end and a second end at its two ends, the cylindrical body comprising a shell and a predetermined volume of liquid filled within the shell, and a single scale line etched on the surface of the shell; and an offset circular boss configured to cover the outer surface of the cylindrical body near the first end, with a predetermined offset distance between the axis of the offset circular boss and the axis of the cylindrical body, wherein rotating the cylindrical body creates a height difference between the first end and the second end for leveling the bubble level.
[0005] Furthermore, the volume of the liquid occupies 80% to 90% of the volume of the shell, and the remaining volume inside the shell forms bubbles. When the edge of the bubble is aligned with the single scale line, the bubble level is in a horizontal state.
[0006] Furthermore, the axis of the offset circular boss is parallel to the axis of the cylindrical body, and the outer surface of the offset circular boss is smoothly connected to the outer surface of the cylindrical body.
[0007] Furthermore, the axial length of the offset circular boss is 1 / 3 to 1 / 10 of the length from the first end to the second end.
[0008] Furthermore, a cylindrical boss is concentrically provided at the second end of the cylindrical body, and the cross-sectional diameter of the cylindrical boss is larger than the cross-sectional diameter of the cylindrical body.
[0009] Furthermore, the length of the cylindrical boss along its axial direction is equal to the axial width of the offset circular boss.
[0010] Furthermore, the offset circular boss extends from the first end to the second end of the cylindrical body to form an obliquely offset circular boss, and the axis of the obliquely offset circular boss is at a certain angle to the axis of the cylindrical body, so that the obliquely offset circular boss coincides with the cylindrical body at the second end. The obliquely offset circular boss is made of transparent plastic.
[0011] Furthermore, the offset distance between the axis of the offset circular boss and the axis of the cylindrical body is 1 / 10 to 1 / 5 of the diameter of the cylindrical body.
[0012] Furthermore, the ratio of the length to the diameter of the cylindrical body is 3:1 to 5:1.
[0013] Furthermore, the housing of the bubble level is made of transparent plastic.
[0014] This utility model of an adjustable bubble level innovatively features an offset circular boss, combined with a single scale line. During use, a height difference can be generated between the first and second ends, allowing the level to be adjusted as needed. The adjustment method is simple; by using the single scale line, the edge of the bubble can be aligned with the single scale line, negligible errors caused by differences in bubble size. This adjustment method offers greater accuracy.
[0015] The above overview is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of this application will become readily apparent from the accompanying drawings and the following detailed description. Attached Figure Description
[0016] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the various drawings denote the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings depict only some embodiments disclosed in this application and should not be construed as limiting the scope of this application.
[0017] Figure 1 A perspective view of an embodiment of a bubble level is shown;
[0018] Figure 2 It shows Figure 1 The side view of the bubble level in the direction of the second end shown;
[0019] Figure 3 A perspective view of another embodiment of a bubble level is shown;
[0020] Figure 4 It shows Figure 3 The side view of the bubble level in the direction of the second end shown;
[0021] Figure 5 A side view of another embodiment of a bubble level is shown;
[0022] Figure 6 It shows Figure 5 The side view of the bubble level from the second end.
[0023] Figure Labels
[0024] 1. Cylindrical body; 11. First end; 12. Second end; 13. Liquid; 14. Bubble; 15. Single scale line; 16. Shell; 2. Offset circular boss; 3. Cylindrical boss; 4. Obliquely offset circular boss. Detailed Implementation
[0025] The following discloses various implementations or embodiments of the described subject matter. To simplify the disclosure, specific examples of elements and arrangements are described below. These are merely examples and are not intended to limit the scope of protection of this application. For example, a first feature subsequently described in the specification being formed above or on a second feature can include implementations where the first and second features are formed in a direct connection, or implementations where an additional feature is formed between the first and second features, thus the first and second features may not be directly connected. Furthermore, reference numerals and / or letters may be repeated in different examples in these disclosures. This repetition is for brevity and clarity and does not in itself indicate a relationship between the various implementations and / or structures to be discussed. Further, when a first element is described in connection with or combined with a second element, the description includes implementations where the first and second elements are directly connected or combined with each other, as well as implementations where one or more other intervening elements are added to indirectly connect or combine the first and second elements with each other.
[0026] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this application. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.
[0027] refer to Figures 1 to 6 The adjustable bubble level of this embodiment includes: a cylindrical body 1, with a first end 11 and a second end 12 at its two ends, respectively. The cylindrical body 1 includes a shell 16 and a liquid 13 of a predetermined volume filled within the shell 16, and a single scale line 15 is engraved on the surface of the shell 16; and an offset circular boss 2, which is configured to cover the outer surface of the cylindrical body 1 near the first end 11, with a preset offset distance between the axis of the offset circular boss 2 and the axis of the cylindrical body 1. By rotating the cylindrical body 1, a height difference is formed between the first end 11 and the second end 12, which is used to level the bubble level. The adjustable bubble level of this embodiment innovatively adopts the offset circular boss 2, and the position of the bubble 14 is adjusted by adjusting the height difference between the first end 11 and the second end 12, thereby leveling the bubble level according to the actual situation. The adjustment method of the bubble level is very simple. Since the bubble level uses a single scale line 15, leveling can be achieved by aligning one edge of the bubble 14 with the single scale line 15 during adjustment. Compared to ordinary double-line levels, leveling accuracy is more precise as long as the edge of the bubble 14 is aligned with the single scale line 15.
[0028] In some embodiments, the volume of the liquid 13 occupies 80% to 90% of the volume of the housing 16, and the remaining volume within the housing 16 forms a bubble 14. When the edge of the bubble 14 is aligned with the single scale line 15, the bubble level is in a horizontal state. Generally, the larger the proportion of the volume occupied by the liquid 13, i.e., the smaller the proportion of the volume occupied by the bubble 14, the higher the leveling accuracy of the bubble level, and vice versa. Extensive experimental testing has shown that in the application scenarios of the adjustable bubble level, when the volume of the liquid 13 occupies 80% to 90% of the volume of the housing 16, high accuracy can be ensured, meeting the leveling requirements of the sight, while also allowing for convenient adjustment by the user.
[0029] refer to Figures 1 to 4 In some embodiments, the axis of the offset circular boss 2 is parallel to the axis of the cylindrical body 1, and the outer surface of the offset circular boss 2 is smoothly connected to the outer surface of the cylindrical body 1. In use, the cylindrical body 1 is rotated to adjust the level of the bubble level. When rotated to the point where the outer surface of the cylindrical body 1 connects to the outer surface of the offset circular boss 2, the smooth transition ensures a linear level adjustment, guaranteeing the accuracy of the leveling.
[0030] refer to Figures 1 to 4In some embodiments, the axial length of the offset circular boss 2 is 1 / 3 to 1 / 10 of the length from the first end 11 to the second end 12. Generally, the smaller the proportion of the axial length of the offset circular boss 2 to the length from the first end 11 to the second end 12, the greater the height difference between the first end 11 and the second end 12, and the greater the adjustable range, and vice versa. Extensive experimental testing has shown that in the application scenarios of the adjustable bubble level, when the axial length of the offset circular boss 2 is 1 / 3 to 1 / 10 of the length from the first end 11 to the second end 12, it meets the adjustment range requirements and is convenient for users to adjust.
[0031] refer to Figures 2 to 4 In some embodiments, the second end 12 is concentrically provided with a cylindrical boss 3, the cross-sectional diameter of which is larger than the cross-sectional diameter of the cylindrical body 1. In some application scenarios, due to different installation environments or different leveling requirements for the bubble level, by adding the cylindrical boss 3 to the second end 12, it can be adapted to various complex application scenarios. Furthermore, by adding the cylindrical boss 3 to the same model of bubble level with the offset circular boss 2 according to different application scenarios, only the size of the cylindrical boss 3 needs to be changed, which can effectively save costs.
[0032] refer to Figures 2 to 4 In some embodiments, the axial length of the cylindrical boss 3 is equal to the axial width of the offset circular boss 2. Because the widths are the same, the contact stability between the first end 11 and the second end 12 is ensured, facilitating user adjustment.
[0033] refer to Figures 5 to 6 In some embodiments, the offset circular boss 2 extends from the first end 11 to the second end 12 of the cylindrical body to form an obliquely offset circular boss 4. The axis of the obliquely offset circular boss 4 forms a certain angle with the axis of the cylindrical body 1, so that the obliquely offset circular boss 4 coincides with the cylindrical body 1 at the second end 12. The obliquely offset circular boss 4 is made of transparent plastic. During the leveling process, since the outer surface of the obliquely offset circular boss 4 is always in contact with the installation environment, such as the outer surface of the mounting base, the linear leveling process can be more effectively ensured, thus ensuring the accuracy of leveling.
[0034] refer to Figures 1 to 4In some embodiments, the offset distance between the axis of the offset circular boss 2 and the axis of the cylindrical body 1 is 1 / 10 to 1 / 5 of the diameter of the cylindrical body 1. Generally, the larger the proportion of the offset distance between the axis of the offset circular boss 2 and the axis of the cylindrical body 1 to the diameter of the cylindrical body 1, the larger the adjustable range, and vice versa. Extensive experimental testing has shown that in the application scenarios of the adjustable bubble level, when the offset distance between the axis of the offset circular boss 2 and the axis of the cylindrical body 1 is 1 / 10 to 1 / 5 of the diameter of the cylindrical body 1, the adjustment range requirements are met, and it is convenient for users to adjust.
[0035] refer to Figures 1 to 6 In some embodiments, the length-to-diameter ratio of the cylindrical body 1 is 3:1 to 5:1. In practical use, this ratio is applicable to most usage scenarios, offering both ease of manufacturing and wide applicability.
[0036] In some embodiments, the housing 16 of the bubble level is made of transparent plastic. The transparent material makes it easy to observe the position of the bubble when adjusting and using the bubble level. Plastic material has low manufacturing cost and is durable and lightweight.
[0037] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of those different embodiments or examples.
[0038] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.
[0039] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in this application, and these should all be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.
Claims
1. An adjustable bubble level, characterized in that, include: A cylindrical body, the two ends of which are a first end and a second end, the cylindrical body includes a shell and a liquid of a predetermined volume filled in the shell, and a single scale line is engraved on the surface of the shell; An offset circular boss is provided, wherein the offset circular boss is configured to cover the outer surface of the cylindrical body near the first end, and there is a preset offset distance between the axis of the offset circular boss and the axis of the cylindrical body. By rotating the cylindrical body, a height difference is formed between the first end and the second end, which is used to level the bubble level.
2. The bubble level according to claim 1, characterized in that, The volume of the liquid accounts for 80% to 90% of the volume of the shell, and the remaining volume inside the shell forms bubbles. When the edge of the bubble is aligned with the single scale line, the bubble level is in a horizontal state.
3. The bubble level according to claim 1, characterized in that, The axis of the offset circular boss is parallel to the axis of the cylindrical body, and the outer surface of the offset circular boss is smoothly connected to the outer surface of the cylindrical body.
4. The bubble level according to claim 3, characterized in that, The axial length of the offset circular boss is 1 / 3 to 1 / 10 of the length from the first end to the second end.
5. The bubble level according to claim 1, characterized in that, The second end of the cylindrical body is concentrically provided with a cylindrical boss, and the cross-sectional diameter of the cylindrical boss is larger than the cross-sectional diameter of the cylindrical body.
6. The bubble level according to claim 5, characterized in that, The length of the cylindrical boss along its axial direction is equal to the axial width of the offset circular boss.
7. The bubble level according to claim 1, characterized in that, The offset circular boss extends from the first end to the second end of the cylindrical body to form an obliquely offset circular boss, and the axis of the obliquely offset circular boss is at a certain angle to the axis of the cylindrical body, so that the obliquely offset circular boss coincides with the cylindrical body at the second end. The obliquely offset circular boss is made of transparent plastic.
8. The bubble level according to claim 1, characterized in that, The offset distance between the axis of the offset circular boss and the axis of the cylindrical body is 1 / 10 to 1 / 5 of the diameter of the cylindrical body.
9. The bubble level according to claim 1, characterized in that, The length-to-diameter ratio of the cylindrical body is 3:1 to 5:
1.
10. The bubble level according to claim 1, characterized in that, The housing of the bubble level is made of transparent plastic.