High-strength leveling instrument

Abstract

A high-strength level ruler comprises a ruler body, a level bubble bracket and a 180-degree level bubble assembly, the 180-degree level bubble assembly is installed in the level bubble bracket, the level bubble bracket is of a U-shaped structure with the upper end and the front end open and the rear end unbroken, and an installation opening for the level bubble bracket to be placed in is formed in the middle of the ruler body. The mounting opening is of a structure with the upper end and the front face corresponding to the level bubble bracket, first buckles clamped into the left side and the right side of the mounting opening in a matched mode are arranged on the left side and the right side of the upper end of the level bubble bracket in a protruding mode, and a clamping groove clamped into the lower edge of the front face of the mounting opening in a matched mode is formed in the front end of the level bubble bracket. A clamping strip which abuts against the inner wall of the back face of the ruler body in a fastened mode is arranged on the rear end face of the level bubble bracket in a protruding mode, the level bubble bracket is assembled in the installation opening in a triple buckle connection mode, and a bracket fixing cover is arranged at the upper end of the level bubble bracket and fixed to the ruler body. The leveling instrument is reasonable in structural design, the bracket and the instrument body are firmly, stably and reliably assembled, the overall structure is high in anti-falling strength, and the precision stability of the leveling instrument is effectively improved.

Description

Technical Field

[0001] The utility model relates to a level ruler, in particular to a high-strength level ruler with good precision and stability. Background Art

[0002] As a conventional measuring tool, the spirit level has multiple measuring methods such as horizontal and vertical, and is widely used in the fields of construction, mechanical installation, carpentry, etc., among which horizontal measurement is the most frequently used. As a commonly used measuring tool, the use environment of the spirit level is usually relatively harsh, and it is usually subject to the influence of falling, vibration, high and low temperature differences, etc. In daily measurement work, the spirit level often falls due to different working methods, resulting in excessive horizontal measurement accuracy. The reason for the excessive horizontal measurement accuracy of the spirit level is the assembly problem of the level bubble bracket and the ruler body opening. After the spirit level falls, the loosening of the bracket and the deformation of the ruler body will cause the horizontal accuracy of the spirit level to change.

[0003] After investigation, the existing Chinese patent number CN200920123161.4, "A Level Ruler", includes a ruler body, a bubble seat, and an end cap. There are multiple holes on the ruler body, and multiple bubble seats are installed. The end of the ruler body is encapsulated with an end cap. The characteristics are: a 180-degree bubble seat is set in the middle of the ruler body, and the arc structure is adopted, and its arc surface matches the arc surface of the bracket; the bracket is buckled and connected to the ruler body for fixing; the bubble seat also includes 90-degree and 45-degree bubble seats, which are respectively set at the ends of the ruler body. The bubble seat includes a bubble and a bubble seat body. The bubble seat body is divided into left and right parts, which are assembled and fixed with a locking block. The bracket of the level ruler is directly buckled at the opening position in the middle of the ruler body. The assembly is relatively simple, and the stability of the bracket is not ideal. There is also the problem that the bracket and the ruler body are not fixed stably enough. Summary of the invention

[0004] The technical problem to be solved by the utility model is to provide a high-strength level ruler with reasonable structural design and firmly fixed bracket in view of the above technical status quo, which has strong anti-falling and deformation performance and effectively improves the accuracy of the level bubble.

[0005] The technical solution adopted by the utility model to solve the above technical problems is: a high-strength level ruler, comprising a ruler body, end covers, a level bubble bracket, and a 180° level bubble assembly of the level ruler, the end covers are fixed at the left and right ends of the ruler body, and the 180° level bubble assembly is installed in the level bubble bracket, characterized in that: the level bubble bracket is a U-shaped structure with an upper end and a front end opening and a rear end that is not separated, a mounting opening for the level bubble bracket to be inserted is opened in the middle of the ruler body, and the mounting opening is a structure with an upper end and a front opening corresponding to the level bubble bracket, and first buckles are convexly provided on the left and right sides of the upper end of the level bubble bracket to fit in with the left and right sides of the mounting opening of the ruler body, a clamping groove is formed on the front end of the level bubble bracket to fit in with the front lower edge of the mounting opening, and a clamping strip is convexly provided on the rear end face of the level bubble bracket to be buckled with the back inner wall of the ruler body, the level bubble bracket is assembled in the mounting opening of the ruler body by a triple buckle connection, and a bracket fixing cover is provided at the upper end of the level bubble bracket to be fixed to the ruler body.

[0006] As an improvement, the upper opening of the mounting port is rectangular and the front opening is U-shaped. The front end face of the level bubble holder is convexly provided with a U-shaped surface that cooperates with the front face of the mounting port. A slot is provided through the lower end of the U-shaped surface. The level bubble holder is buckled at the lower edge of the front face of the mounting port through the slot of the U-shaped surface at the front end, and the lower end of the level bubble holder is inserted into the ruler body for positioning.

[0007] Furthermore, the rear end face of the level bubble holder is a plane that cooperates with the back side of the ruler body, a strip-shaped concave surface is provided at the upper end of the rear end face of the level bubble holder, a clamping strip is arranged on the rear side of the strip-shaped concave surface, a lower end face of the clamping strip is an inclined surface, and an inclined step that cooperates with the lower end of the clamping strip is formed on the inner wall of the back side of the ruler body.

[0008] Furthermore, the bracket fixing cover is an inverted L-shaped cover plate that cooperates with the upper end and front end opening of the level bubble bracket, and the upper end and front end of the bracket fixing cover are provided with corresponding L-shaped hollows, and steps for the bracket fixing cover to be placed on the left and right sides of the upper end opening of the level bubble bracket are recessed, and a positioning groove is recessed in the middle of the step, and convex edges that cooperate with the steps are formed on the left and right sides of the bracket fixing cover, and a positioning block that cooperates with the positioning groove is convexly provided on the lower end surface of the convex edge.

[0009] Furthermore, a second buckle is convexly provided on the rear side of the upper end of the bracket fixing cover and is engaged with the upper edge of the back side of the mounting opening of the ruler body, and an undercut is convexly provided on the lower side of the front end of the bracket fixing cover and is matched with the level bubble bracket.

[0010] Furthermore, there are two inverted buckles on the left and right, and the bottom surface of the front end opening of the level bubble bracket is concave with two left and right slots for people to get stuck in the inverted buckles. The bracket fixing cover is arranged at the upper end opening position of the level bubble bracket, fastened with the ruler body through the second buckle, and then fixed with the inverted buckle and the slot.

[0011] Furthermore, the 180° vial assembly is assembled from a vial and a vial seat, and a mounting cavity for inserting the 180° vial assembly is provided in the vial bracket, and the 180° vial assembly is fixed in the mounting cavity.

[0012] Furthermore, a rectangular hollow is provided on the rear end surface of the vial bracket corresponding to the position of the vial, and a window for easy observation is provided at the corresponding position on the back of the ruler body.

[0013] Finally, two circular mounting openings are provided on the ruler body, and two circular level bubbles for measuring 90° and 45° are fixed on the circular mounting openings of the ruler body through circular bubble seats.

[0014] Compared with the prior art, the advantages of the present invention are as follows: the level bubble bracket is changed from the traditional double-sided disconnection at the opening to a single-sided disconnection, which greatly improves the anti-drop strength of the ruler body and ensures the accuracy of the level bubble; the level bubble bracket and the ruler body are connected by a triple snap connection method, which plays the role of a multi-layer protection bracket, so that the bracket will not move or rotate in the radial direction of the axis after assembly, and the installation is firm and stable; a bracket fixing cover is provided to further increase the strength; a window is opened on the back of the ruler body, so that the accuracy of the level bubble can also be observed on the back of the ruler body, and the operation is more convenient. The present invention has a reasonable structural design, the bracket and the ruler body are firmly, stably and reliably assembled, the overall structure has a high anti-drop strength, and effectively improves the accuracy and stability of the level ruler. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a front structural schematic diagram of a level ruler according to an embodiment of the utility model;

[0016] Figure 2 This is a schematic diagram of the back structure of a level ruler according to an embodiment of the utility model;

[0017] Figure 3 An exploded view of an embodiment of the utility model;

[0018] Figure 4 It is a structural schematic diagram of the assembly of the bracket and the ruler body;

[0019] Figure 5 for Figure 4 A longitudinal cross-sectional view of

[0020] Figure 6 is a schematic diagram of the back structure of the bracket;

[0021] Figure 7 is a schematic diagram of the front structure of the bracket;

[0022] Figure 8 is a bottom view of the bracket;

[0023] Fig. 9It is a schematic diagram of the structure of the bracket fixing cover;

[0024] Fig.10 A longitudinal sectional view of the bracket after the cover is assembled;

[0025] Figure 11(a) to Figure 11(b) This is a working principle diagram of an embodiment of the utility model, a is when the ruler is less than 1 meter from the ground, b is when the ruler is more than 1 meter from the ground;

[0026] Fig.12 This is a working principle diagram of the vial bubble observed from the back window when the embodiment of the utility model is working at a high measuring surface. DETAILED DESCRIPTION

[0027] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0028] like Figures 1 to 12 As shown, a high-strength level ruler comprises a ruler body 1, an end cover 5, a level bubble bracket 2, and a 180° level bubble assembly 3. The end cover 5 is fixed to the left and right ends of the ruler body 1. The 180° level bubble assembly 3 is installed in the level bubble bracket 2. A mounting opening 11 for the level bubble bracket 2 is provided in the middle of the ruler body 1. The level bubble bracket 2 is a U-shaped structure with an upper end and a front end opening and a rear end not disconnected. The mounting opening 11 is a structure with an upper end and a front opening corresponding to the level bubble bracket 2. The left and right sides of the upper end of the bubble holder 2 are convexly provided with first buckles 21 that fit into the left and right sides of the mounting opening 11 of the ruler body 1, the front end of the level bubble holder 2 is formed with a slot 23 that fits into the front lower edge of the mounting opening 11, the rear end face of the level bubble holder 2 is convexly provided with a clip strip 24 that is buckled against the back inner wall of the ruler body 1, the level bubble holder 2 is assembled in the mounting opening of the ruler body 1 by means of a triple buckle connection, and a bracket fixing cover 4 is provided at the upper end of the level bubble holder 2 to be fixed to the ruler body 1.

[0029] The specific structure is as follows: the upper end opening of the installation port 11 is rectangular, the front opening is U-shaped, the front end surface of the level bubble bracket 2 is convexly provided with a U-shaped surface 22 that matches the front of the installation port 11, and the card slot 23 is opened through the lower end of the U-shaped surface 22. The level bubble bracket 2 is buckled at the lower edge of the front of the installation port 11 through the card slot 23 of the U-shaped surface 22 at the front end, and the lower end of the level bubble bracket 2 is inserted into the ruler body 1 for positioning. The rear end surface of the level bubble bracket 2 is a plane that matches the back of the ruler body 1, and a strip concave surface 29 is opened at the upper end of the rear end surface of the level bubble bracket 2. The card strip 24 is arranged on the rear side of the strip concave surface 29, and the lower end surface of the card strip 24 is an inclined surface. The inner wall of the back of the ruler body 1 is formed with an inclined step that matches the lower end of the card strip 24.

[0030] The bracket fixing cover 4 is an inverted L-shaped cover plate that matches the upper end and front end opening of the level bubble bracket 2. The upper end and front end of the bracket fixing cover 4 are provided with corresponding L-shaped hollows 41. The left and right sides of the upper end opening of the level bubble bracket 2 are recessed with steps 26 for the bracket fixing cover 4 to rest on. The middle of the step 26 is recessed with a positioning groove 27. The left and right sides of the bracket fixing cover 4 are formed with convex edges 42 that match the steps 26. The lower end surface of the convex edge 42 is convexly provided with a positioning block 43 that matches the positioning groove 27. The rear side of the upper end of the bracket fixing cover 4 is convexly provided with a second buckle 45 that is buckled with the upper edge of the back side of the mounting opening 11 of the ruler body 1. The lower side of the front end of the bracket fixing cover 4 is convexly provided with an undercut 44 that matches the level bubble bracket 2. There are two inverted buckles 44 on the left and right sides. The bottom surface of the front end opening of the level bubble bracket 2 is concavely provided with two left and right slots 25 for the inverted buckles 44 to be engaged. The bracket fixing cover 4 is provided at the upper end opening of the level bubble bracket 2 and is fastened to the ruler body 1 through the second buckle 45, and then fixed with the slots 25 through the inverted buckle 44. The 180° level bubble assembly 3 is assembled from a level bubble and a level bubble seat. The level bubble bracket 2 is provided with an installation cavity for the 180° level bubble assembly 3 to be placed therein, and the 180° level bubble assembly 3 is arranged and fixed in the installation cavity.

[0031] The rear end surface of the level bubble bracket 2 is provided with a rectangular hollow 28 corresponding to the position of the level bubble, and the back of the ruler body 1 is provided with a window 12 for easy observation. In this way, the accuracy of the level bubble can also be observed on the back of the ruler body 1, which is more convenient to operate.

[0032] The ruler body 1 is provided with two circular mounting openings 13 on the left and right sides. Two circular level bubbles for measuring 90° and 45° are fixed on the circular mounting openings 13 of the ruler body 1 through circular bubble seats.

[0033] The fixing structure of the circular vial and the circular vial seat is conventional technology and will not be described in detail here.

[0034] The specific assembly process is:

[0035] 1. Install the level bubble bracket: put the level bubble bracket 2 into the installation opening 11 of the ruler body 1, align the card slot 23 at the front end of the level bubble bracket 2 with the lower edge of the front end of the installation opening 11, insert it, the first buckles 21 on the left and right sides of the level bubble bracket 2 are buckled with the ruler body 11, and the card strip 24 at the rear end of the level bubble bracket 2 is buckled with the inclined step of the inner wall of the back of the ruler body 1;

[0036] 2. Install the bracket fixing cover 4: Align the bracket fixing cover 4 with the upper end surface step 26 of the level bubble bracket 2 and insert it, snap the second buckle 45 at the rear end of the bracket fixing cover 4 into the upper edge of the back side of the installation opening 11 of the ruler body 1, and insert the undercut 44 at the front end of the bracket fixing cover 4 into the slot 25 of the level bubble bracket 2 for positioning. When the second buckle 45 is buckled into the ruler body 1, it will rebound to the outside of the level bubble bracket 2, and when the undercut 44 is inserted into the slot 25 and locked, a "click" sound can be heard, indicating that the assembly is in place, and the recognition is strong.

[0037] This embodiment adopts a multiple snap-fitting method to lock and fix, so that the level bubble bracket 2 and the ruler body 1 are assembled firmly, stably and reliably, the overall structure has high drop resistance, and the accuracy and stability of the level ruler are effectively improved.

[0038] The level bubble bracket 2 of the present embodiment adopts a single-side continuous connection method. Compared with the prior art, because one side of the ruler 1 is not cut off, the drop resistance is greatly improved. In use, as shown in Figure 11 (a), when the working surface B is lower than the ground A (h < 1m), it is easier to observe the accuracy of the level bubble when the 180° level bubble assembly 3 is facing upward, and when the working surface B is higher than the ground A (h > 1m), it is easier to observe the accuracy of the level bubble when the 180° level bubble assembly 3 is facing downward, as shown in Figure 11 (b).

[0039] The existing level ruler is broken at the hole of the bubble. When marking on the work surface with a marking pen C, the marking cannot be done in the middle due to the break in the middle, which affects the work. However, in this embodiment, since the ruler body 1 is not broken on one side, the marking pen C can also mark in the middle without affecting the work.

[0040] Fig.12 When the height of the measuring surface A from the ground A is 1.8 m, observe the working principle diagram of the vial from the rear window 12.

[0041] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A high-strength level ruler, comprising a ruler body, end caps, a level bubble bracket, and a 180° level bubble assembly, wherein the end caps are fixed to the left and right ends of the ruler body, and the 180° level bubble assembly is installed in the level bubble bracket, characterized in that: The level bubble bracket is a U-shaped structure with an upper end and a front end open and a rear end that is not separated. A mounting opening for the level bubble bracket is opened in the middle of the ruler body, and the mounting opening is a structure with an upper end and a front opening corresponding to the level bubble bracket. The left and right sides of the upper end of the level bubble bracket are convexly provided with first buckles that fit into the left and right sides of the mounting opening of the ruler body. A slot is formed at the front end of the level bubble bracket that fits into the front lower edge of the mounting opening. A clip strip is convexly provided on the rear end face of the level bubble bracket that is buckled against the back inner wall of the ruler body. The level bubble bracket is assembled in the mounting opening of the ruler body by means of a triple buckle connection, and a bracket fixing cover is provided at the upper end of the level bubble bracket to be fixed to the ruler body.

2. The high-strength level according to claim 1, characterized in that: The upper end opening of the installation port is rectangular and the front opening is U-shaped. The front end face of the level bubble holder is convexly provided with a U-shaped surface that matches the front face of the installation port. A slot is provided through the lower end of the U-shaped surface. The level bubble holder is buckled at the lower edge of the front face of the installation port through the slot of the U-shaped surface at the front end, and the lower end of the level bubble holder is inserted into the ruler body for positioning.

3. The high-strength level according to claim 2, characterized in that: The rear end face of the level bubble bracket is a plane that matches the back side of the ruler body. A strip-shaped concave surface is provided at the upper end of the rear end face of the level bubble bracket. The clamping strip is arranged on the rear side of the strip-shaped concave surface. The lower end face of the clamping strip is an inclined surface. The inner wall of the back side of the ruler body is formed with an inclined step that matches the lower end of the clamping strip.

4. The high-strength level according to claim 3, characterized in that: The bracket fixing cover is an inverted L-shaped cover plate that matches the upper end and front end openings of the level bubble bracket. The upper end and front end of the bracket fixing cover are provided with corresponding L-shaped hollows. Steps for the bracket fixing cover to rest on are recessed on the left and right sides of the upper end opening of the level bubble bracket. A positioning groove is recessed in the middle of the step. Raised edges that match the steps are formed on the left and right sides of the bracket fixing cover, and a positioning block that matches the positioning groove is convexly provided on the lower end surface of the raised edge.

5. The high-strength level according to claim 4, characterized in that: The upper rear side of the bracket fixing cover is convexly provided with a second buckle which is buckled with the upper edge of the back side of the mounting opening of the ruler body, and the front lower side of the bracket fixing cover is convexly provided with an undercut which cooperates with the level bubble bracket.

6. The high-strength level according to claim 5, characterized in that: There are two inverted buckles on the left and right, and two left and right slots for people to get stuck in the inverted buckles are recessed on the bottom surface of the front end opening of the level bubble bracket. The bracket fixing cover is arranged at the upper end opening position of the level bubble bracket, fastened with the ruler body through the second buckle, and then fixed by the inverted buckle and the slot.

7. The high-strength level according to any one of claims 1 to 6, characterized in that: The 180° vial assembly is assembled from a vial and a vial seat. The vial bracket is provided with an installation cavity for the 180° vial assembly to be placed in. The 180° vial assembly is fixed in the installation cavity.

8. The high-strength level according to any one of claims 1 to 6, characterized in that: A rectangular hollow is provided on the rear end surface of the vial bracket corresponding to the position of the vial, and a window for convenient observation is provided at the corresponding position on the back of the ruler body.

9. The high-strength level according to any one of claims 1 to 6, characterized in that: The ruler body is provided with two circular mounting openings on the left and right sides. Two circular level bubbles for measuring 90 degrees and 45 degrees are fixedly mounted on the circular mounting openings of the ruler body through circular bubble seats.

Images