Vernier caliper for fixing and pressing copper sheet by using grooved structure

Abstract

The invention discloses a vernier caliper for fixing a pressing copper sheet by using a groove structure, which comprises a vernier caliper, the vernier caliper comprises a main scale and an auxiliary scale, the main scale extends to form a graduated scale, the upper part of the auxiliary scale is provided with an upper clamping piece, the lower part of the auxiliary scale is provided with a lower clamping piece, the bottom end of the upper clamping piece is provided with a groove, and the pressing copper sheet is embedded in the groove. The pressing copper sheet is fixed through the groove structure, the groove is more attached to the pressing copper sheet, the thickness of the pressing copper sheet is increased, the main ruler is compacted, and the fixity of the pressing copper sheet is improved; the tightness degree of the vernier auxiliary scale is better adjusted, the sliding effect and the use performance are improved, the precision is enhanced, good experience is brought to a user, and the service life of a product is prolonged.

Description

Technical Field

[0001] The present invention relates to the field of measuring tools, and in particular to a vernier caliper utilizing a grooved structure to fix and compress a copper sheet. Background Art

[0002] A vernier caliper is a measuring tool for measuring length, inner and outer diameters, and depth. It has the characteristics of simple structure, ease of use, medium accuracy, and a large measuring range. There are many types of vernier calipers, which are universal measuring tools used to measure the inner diameter, outer diameter, length, width, thickness, depth, and hole spacing of parts. They are widely used in all fields that require precise measurement, such as mechanical processing, quality inspection, construction, experimental research, etc.

[0003] In actual use, there are three main reasons why the vernier caliper cannot be used normally: one is that various screws fall off; the second is that the clamping copper sheet slips out and is lost; the third is that the tail pressure plate or limit screw is lost. These situations are all caused by the defects in the current structural design of the fixed clamping copper sheet. These defects include the copper sheet being difficult to fix, not clamping tightly, not pressing firmly, wear caused by frequent use, thread slippage due to uneven pressure, and the copper sheet being loose and easy to fall out. Secondly, the copper sheet is inconvenient to repair and difficult to replace, and it is difficult to find accessories of the right size. Thirdly, the existing technology for processing the copper sheet is complicated, which makes the copper sheet easy to fix but increases the processing difficulty. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the defects of the existing technology and provide a vernier caliper that uses a groove structure to fix the compressed copper sheet, mainly solving the problem of fixing the compressed copper sheet and the resulting confusion in the sizes of the vernier sub-scale and the compressed copper sheet.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0006] The present invention provides a vernier caliper that utilizes a groove structure to fix and compress a copper sheet, including a vernier caliper, wherein the vernier caliper includes a main scale and a secondary scale, wherein the main scale is extended with a scale, and the secondary scale is used for sliding and clamping on the scale; an upper clamping piece is provided on the upper part of the secondary scale, and a lower clamping piece is provided on the lower part of the secondary scale, wherein an upper cover plate is installed at the front end of the upper clamping piece, and a fastening screw is installed at the top end of the upper clamping piece, including: a groove, which is provided on the inner side of the upper clamping piece; a compression copper sheet, wherein the upper part of the compression copper sheet is embedded in the groove, and the lower part of the compression copper sheet is tightly against the scale; a fastening screw, which is installed in the middle part of the upper clamping piece, and is used for generating pressure on the compression copper sheet.

[0007] Preferably, the length of the groove is 50±1 mm, the depth of the groove is 0.5 mm-1 mm, the gap between the compressed copper sheet and the groove is 0.15 mm-0.2 mm, and the thickness of the compressed copper sheet is 1.5 mm-2 mm.

[0008] Preferably, both ends of the upper clamping member are smooth.

[0009] Preferably, the pressing copper sheet and the groove are clearance-fitted.

[0010] Preferably, the middle side of the rear surface of the scale includes a depth gauge, and the upper and lower parts of the scale are both provided with fastening structures perpendicular to the depth gauge.

[0011] Preferably, the fastening structure includes a square frame and fastening bolts for fixing the square frame, wherein the square frame half covers the surface of the scale.

[0012] Preferably, through holes are provided on the top and bottom of the frame, and fastening bolts are used to pass through the through holes in a vertical direction to be fixed to the surface of the scale.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1: The present invention fixes and compresses the copper sheet through a groove structure. The groove fits the compressed copper sheet more closely, increases the thickness of the compressed copper sheet, compacts the main scale, and improves the fixation of the compressed copper sheet; better adjusts the tightness of the vernier sub-scale, improves the sliding effect and performance, enhances accuracy, brings a good experience to users, and extends the service life of the product.

[0015] 2: The present invention can unify the size of the vernier sub-scale and the size of the pressing copper sheet according to the size of the main scale, making the pressing copper sheet easy to process, install and maintain, realizing the interchangeability of vernier caliper parts, and solving existing problems and defects in the use of vernier calipers. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0017] Figure 1 It is a schematic diagram of the structure of a vernier caliper in the prior art;

[0018] Figure 2 It is a schematic diagram of a vernier caliper of the present invention;

[0019] Figure 3 This is a schematic diagram of the vernier secondary ruler of the present invention with the upper cover plate removed and the groove formed;

[0020] Figure 4 This is a schematic diagram of the groove at the upper end of the vernier secondary scale of the present invention and the copper sheet being pressed;

[0021] Figure 5 This is a schematic diagram of the square frame of the present invention being fixed with two upper and lower fastening bolts;

[0022] Figure 6It is a cross-sectional view of the frame structure of the present invention;

[0023] In the figure: 1. Vernier caliper; 2. Main scale; 201. Scale; 3. Secondary scale; 301. Upper clamping piece; 302. Lower clamping piece; 303. Fastening screw; 4. Groove; 401. Side; 5. Pressing copper sheet; 6. Depth gauge; 7. Fastening structure; 701. Frame; 702. Fastening bolt; 703. Through hole. DETAILED DESCRIPTION

[0024] Currently, the vernier calipers on the market are mainly open, semi-open and closed types, with three display modes: vernier, dial and digital. Their process design adopts the structure of "two slotted flat-end countersunk screws (jackscrews) plus a fastening screw" on the upper frame of the vernier scale to fix and adjust the copper sheet; as shown in Table 1 below:

[0025]

[0026] Table 1 Questionnaire for the width of the main scale of a vernier caliper (mm)

[0027] Since the width of the main scale is not uniform, the length, width and thickness of the vernier sub-scale are different. The length, width and thickness of the pressed copper sheet must also be determined according to the size of the main scale and the vernier sub-scale. There is no unified size standard.

[0028] In actual use, there are three main reasons why a vernier caliper may not function properly: first, various screws fall off; second, the copper plate slips out and is lost; and third, the tail pressure plate or limit screw is lost. These problems are all caused by defects in the current structural design of the copper plate. These defects include the copper plate being difficult to fix, not being able to clamp tightly, not being able to press firmly, and frequent use causing wear and tear, thread stripping, and the copper plate becoming loose and easily falling out.

[0029] Therefore, the present invention designs a groove structure for fixing and pressing the copper sheet on the basis of the original vernier caliper, and further limits the structural size of the groove structure to meet the size specifications and process requirements of the existing vernier caliper.

[0030] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0031] In this embodiment, if Figures 2 to 4As shown, the present invention provides a vernier caliper that uses a groove structure to fix and compress a copper sheet, including a vernier caliper 1, the vernier caliper 1 including a main scale 2 and a sub-scale 3, the main scale 2 extending to the right with a scale 201, the sub-scale 3 being used for sliding and clamping on the scale 201; an upper clamping member 301 and a lower clamping member 302 are respectively provided on the upper and lower parts of the sub-scale 3, wherein an upper cover plate is installed at the front end of the upper clamping member 301, and a fastening screw 303 is installed at the top of the upper clamping member 301. In normal use, the user adjusts the sub-scale 3 to slide back and forth on the main scale 2 to measure the size of the target object, and then rotates the fastening screw 303 to fix the sub-scale 3 on the main scale 2. After removing the vernier caliper 1, the size of the target object can be directly read;

[0032] However, the pressure piece arranged between the existing fastening screw 303 and the main scale 2 is usually a copper piece. The horizontal copper piece is not easy to fix and is not clamped tightly. Frequent use leads to wear and tear, thread stripping, loosening of the copper piece, and easy falling out. The dimensions measured by the vernier caliper 1 are confused, and replacement and maintenance are difficult. Therefore, a groove 4 is provided on the inner side of the upper clamping piece 301, and a clamping copper piece 5 is embedded and installed in the groove 4. The upper part of the clamping copper piece 5 is embedded in the groove 4, and the lower part of the clamping copper piece 5 is close to the scale 201. The vertical projection of the fastening bolt is located in the middle of the upper surface of the clamping copper piece 5, and the clamping copper piece 5 and the groove 4 are clearance-matched. The clamping copper sheet 5 is embedded in the groove 4. No matter how the secondary ruler 3 moves left and right on the scale 201, the clamping copper sheet 5 will not move from the groove 4 to the outside, and the pressure point on the upper surface of the clamping copper sheet 5 always corresponds to the fastening bolt, so that the center of the clamping copper sheet 5 is always under pressure, so that the left and right pressures of the upper clamping piece 301 are balanced, and the thread slippage of the fastening screw 303 is reduced, avoiding the problem of large errors caused by the loosening of the clamping copper sheet 5 after long-term use of the vernier caliper 1. In addition, there is no need to repeatedly align the copper sheet and the upper clamping piece 301 during later maintenance and disassembly and assembly. At the same time, this design complies with the specifications of GB / T 21389-2008 and is more convenient for improvement on the assembly line during the process of production.

[0033] The improved structure is as follows Figure 2 As shown, both ends of the upper clamping member 301 are smooth, and the countersunk screws in the prior art are eliminated, thereby eliminating two screws that need to be fixed.

[0034] Specifically, such as Figures 2 to 4 As shown, the upper and lower parts of the secondary ruler 3 are slidably connected to the surface of the scale 201 through the upper clamping part 301 and the lower clamping part 302. In order to prevent the copper sheet from slipping at the upper clamping part 301, a groove 4 structure is designed on the inner side of the upper clamping part 301, and a pressing copper sheet 5 with the same projected area is designed, so that the pressing copper sheet 5 can be embedded in the groove 4. At the same time, the pressing copper sheet 5 and the groove 4 are clearance-fitted, which facilitates the installation of the pressing copper sheet 5 regardless of the subsequent disassembly or maintenance of the vernier caliper 1.

[0035] At the same time, since the fastening screw 303 is always located in the middle of the upper surface of the pressing copper sheet 5, the bottom of the fastening screw 303 is always covered by the pressing copper sheet 5, which avoids the situation where the fastening screw 303 is only squeezed onto one end of the pressing copper sheet 5, resulting in uneven force, affecting the fastening screw 303 and causing thread slippage; and no matter whether the fastening screw 303 is loose or tight, the force between the upper clamping piece 301 and the pressing copper sheet 5 is more uniform, thereby greatly increasing the service life of the vernier caliper 1 and the measurement accuracy of the vernier caliper 1.

[0036] The groove 4 and the copper clamping plate 5 are independent of the width of the main scale, varying only with the thickness of the main scale 2. If the main scale 2 has a uniform thickness, the groove 4 and the copper clamping plate 5 can also be made uniform and interchangeable. The groove also increases the relative thickness of the copper clamping plate 5, ensuring better and more durable compression.

[0037] In another embodiment, the length of the groove 4 is 50±1mm, the depth of the groove 4 is 0.5mm-1mm, the gap between the compression copper sheet 5 and the groove 4 is 0.15mm-0.2mm, and the thickness of the compression copper sheet 5 is 1.5mm-2mm; because the groove 4 determines the corresponding length and depth, the compression copper sheets 5 in the main scale 2 of the same thickness can be used interchangeably when the thickness of the main scale 2 is determined, or the compression copper sheets 5 of the same size can be used directly; the determined values also comply with the GB / T 21389-2008 specifications and can be directly processed and set on the main scale 2.

[0038] In another embodiment, the middle side of the rear surface of the scale 201 includes a depth scale 6, and the upper and lower parts of the scale 201 are provided with fastening structures 7 perpendicular to the depth scale 6; the fastening structure 7 includes a square frame 701 and fastening bolts 702 for fixing the square frame 701, wherein the square frame 701 is half-covered on the surface of the scale 201; the top and bottom of the frame 701 are provided with through holes 703, and the fastening bolts 702 are used to pass through the through holes 703 in a vertical direction to be fixed to the surface of the scale 201.

[0039] Specifically, conventional fixing methods for the depth gauge 6 are mainly a process structure of a double screw pressure plate or a single pressure limit screw. The form of the double screw pressure plate can be as follows: Figure 1 As shown in the right side structure, the double-screw pressure plate structural design has the problem that the screw thread is too shallow and easy to loosen, resulting in the pressure plate falling off, the depth gauge breaking and damaging, the vernier sub-scale sliding out, the compression copper sheet falling off, etc., affecting normal use; the single compression limit screw structural design has the problem that the single nut fixing effect is not good, it is easy to loosen, and there is a lot of friction on the depth gauge. All of these will make it impossible to interchange or find suitable accessories after the screw is lost;

[0040] Therefore, in this embodiment, a structural design is improved to include a square frame 701 with two upper and lower fastening bolts 702. The width of the square frame 701 is also designed according to the length of the scale 201, and the width of the square frame 701 can be appropriately adjusted according to the length margin of the scale 201. The square frame 701 has a width and thickness of 1 mm, and two 3 mm through holes are opened at the top and bottom of the square frame 701. A blind hole with internal threads is drilled on the scale 201. This structure primarily limits and secures the depth gauge 6 vertically. The square frame 701 limits the depth gauge 6 laterally, ultimately creating a horizontal limit for the depth gauge 6 structure, eliminating the need for direct pressure fixation or adjustment. This also prevents the secondary scale 3 from sliding off the main scale 2, preventing it from falling off. The design dimensions of the square frame 701 are also uniform, ensuring interchangeability.

[0041] In this embodiment, if Figure 6 As shown, the frame 701 is designed in a C-shaped structure. Even if one of the fastening bolts 702 is lost, the user can only use the other fastening bolt 702 to form a simple adjustment effect on the scale 201.

[0042] In summary, when the above embodiments are used in combination, the screw structure involved in the vernier caliper formed by the present invention is not easy to be lost, and the lost screws or clamping copper sheets can be easily replaced or used alternately according to a unified size. For example, vernier calipers of different measuring sizes can be used alternately, so that the clamping copper sheet can be processed, installed, and maintained conveniently, and the interchangeability of vernier caliper parts is achieved. The frame 701 and the groove 4 are designed to work together for better results, mainly to prevent the secondary scale 3 from falling and protect the depth scale 201. Because the secondary scale 3 is sized by the main scale 2, the groove 4 is sized by the secondary scale 3, and the clamping copper sheet 5 is sized by the groove 4, which are linked together. The frame 701 is also sized by the main scale 2, so the size design can be unified. After the designed structure is used in combination, the service life of the vernier caliper can also be increased.

[0043] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or substitute equivalents for some of the technical features. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A vernier caliper for fixing and pressing a copper sheet by using a groove structure, comprising a vernier caliper (1), wherein the vernier caliper (1) comprises a main scale (2) and a secondary scale (3), wherein the main scale (2) is extended with a scale (201), and the secondary scale (3) is used for sliding and clamping on the scale (201); an upper clamping member (301) is provided on the upper part of the secondary scale (3), and a lower clamping member (302) is provided on the lower part of the secondary scale (3), wherein an upper cover plate is installed at the front end of the upper clamping member (301), and a fastening screw (303) is installed at the top end of the upper clamping member (301), characterized in that: Also includes: A groove (4), the groove (4) being provided on the inner side of the upper clamping member (301); A pressing copper sheet (5), wherein the upper portion of the pressing copper sheet (5) is embedded in the groove (4), and the lower portion of the pressing copper sheet (5) is in close contact with the scale (201); A fastening screw (303) is installed in the middle of the upper clamping member (301), and the fastening screw (303) is used to generate pressure on the compressed copper sheet (5).

2. A vernier caliper for fixing and compressing a copper sheet using a groove structure according to claim 1, characterized in that: The length of the groove (4) is 50±1 mm, the depth of the groove (4) is 0.5 mm-1 mm, the gap between the pressing copper sheet (5) and the groove (4) is 0.15 mm-0.2 mm, and the thickness of the pressing copper sheet (5) is 1.5 mm-2 mm.

3. The vernier caliper for fixing and compressing a copper sheet using a groove structure according to claim 1, characterized in that: Both ends of the upper clamping piece (301) and the lower clamping piece (302) are chamfered and smooth, and the upper surface of the upper clamping piece (301) is a smooth plane.

4. The vernier caliper for fixing and compressing a copper sheet using a groove structure according to claim 1, characterized in that: The pressing copper sheet (5) and the groove (4) are clearance-fitted.

5. The vernier caliper for fixing and compressing a copper sheet using a groove structure according to claim 1, characterized in that: The middle side of the rear surface of the scale (201) includes a depth gauge (6), and the upper and lower parts of the scale (201) are both provided with fastening structures (7) perpendicular to the depth gauge (6).

6. The vernier caliper for fixing and pressing a copper sheet using a groove structure according to claim 5, characterized in that: The fastening structure (7) comprises a square frame (701) and fastening bolts (702) for fixing the square frame (701), wherein the square frame (701) is half-covered on the surface of the scale (201).

7. A vernier caliper for fixing and compressing a copper sheet using a groove structure according to claim 6, characterized in that: The top and bottom of the square frame (701) are both provided with through holes (703), and the fastening bolts (702) are used to pass through the through holes (703) in a vertical direction and be fixed to the surface of the scale (201).

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