Lightweight caliper capable of sliding smoothly

Abstract

The utility model discloses a light-weight smooth-sliding caliper, which comprises a main caliper module, a sliding caliper module and a fixed caliper module, the fixed caliper module is fixedly mounted on the main caliper module, and the sliding caliper module is arranged on the main caliper module and can freely slide along the length direction of the main caliper module. The main ruler module comprises a main ruler base body and a sliding supporting rod, the sliding supporting rod and the main ruler base body are fixedly installed together, a first sliding block corresponding to the sliding supporting rod is arranged in the sliding ruler module, and the sliding supporting rod is sleeved with the first sliding block. According to the utility model, the sliding support rod is matched with the main ruler base body to form the ruler main body structure, so that the strength of the main ruler can be ensured, the weight of the caliper can be effectively reduced, and the smooth sliding of the sliding ruler can be ensured.

Description

Technical Field

[0001] The utility model discloses a caliper, in particular to a light-weight and smooth-sliding caliper, belonging to the technical field of measuring tools. Background Art

[0002] A caliper is a tool used to measure dimensions such as the length, diameter, and depth of an object, and is commonly used for precision measurements and engineering applications. A caliper typically consists of a main scale and a sliding scale (also called a sliding scale). The main scale is the foundation of the entire caliper and is typically a metal scale with graduations engraved on it. The sliding scale can slide across the main scale to accurately measure the length or spacing of objects. Calipers are currently divided into three main categories: vernier calipers, dial calipers, and digital calipers. The sliding scale of a vernier caliper also has a scale, which is usually coordinated with the scale of the main scale for reading measurements. The sliding scale of a dial caliper has a scale dial module, while the sliding scale of a digital caliper has a digital display module. These modules are designed to facilitate reading measurement values. The measurement principle of a caliper is based on the relative position between the main scale and the sliding scale. When the sliding scale is moved, the position distance between the sliding scale's jaws relative to the main scale's jaws can be read through the scale on the main scale, or the scale dial module and digital display module on the main scale, thereby determining the corresponding size of the object being measured.

[0003] Calipers are widely used in the following fields and scenarios: Mechanical processing and engineering measurement: used to measure the dimensions of mechanical parts, such as length, step, hole depth and aperture, etc., to ensure that the parts in the production process meet the requirements of the drawings. Manufacturing: used to inspect the external dimensions of products on the production line to control product quality and ensure that the products meet the specifications. Laboratories and scientific research: used for more precise experimental measurements, such as the dimension measurement of various experimental instruments and experimental items in physics, chemistry and biology experiments, comparative measurement of experimental results, etc. Daily life: used for home repairs and DIY projects, such as measuring the processing dimensions of DIY wood, aluminum alloy profiles, etc. or the dimension verification of assembly parts. In short, calipers have become one of the indispensable common measuring tools in the engineering and manufacturing industries because of their high precision, ease of use and moderate cost.

[0004] Most common small-sized calipers have a measuring range of 15CM to 30CM. There are also some calipers used in special industries. Due to the special characteristics of the workpiece and process, large calipers with a measuring range of 2 to 3 meters or even 5 meters are required. For large calipers, in addition to ensuring basic requirements such as measurement accuracy, another consideration is the deformation problem during transportation and use. Once deformation occurs, it is bound to affect the measurement accuracy. Therefore, the main scale size of a large caliper cannot be made very small to ensure the strength of the main scale itself. However, this will create another problem. Under such requirements, the main scale of a large caliper will be too heavy, making it inconvenient to carry and use. Some large calipers may weigh more than ten or even dozens of kilograms, sometimes requiring two people to carry them away, which also seriously affects the convenience of use. Summary of the Invention

[0005] In response to the above-mentioned shortcomings of large calipers in the prior art, such as being too heavy and inconvenient to carry, the utility model provides a lightweight caliper with smooth sliding. The caliper forms the main structure of the scale body by combining a sliding support rod with a main scale, which can not only ensure the strength of the main scale, but also effectively reduce the weight of the caliper, while also ensuring smooth sliding of the sliding scale.

[0006] The utility model adopts the following technical solution to solve the technical problem: a light-weight and smoothly sliding caliper, the caliper comprising a main scale module, a sliding scale module and a fixed scale module, the fixed scale module being fixedly mounted on the main scale module, the sliding scale module being arranged on the main scale module and being able to slide freely along the length direction of the main scale module, the main scale module comprising a main scale base and a sliding support rod, the sliding support rod being fixedly mounted on the main scale base, a slider being arranged in the sliding scale module corresponding to the sliding support rod, and the slider being sleeved on the sliding support rod.

[0007] The technical solution adopted by the utility model to solve its technical problems further includes:

[0008] The sliding support rod includes a first sliding support rod and / or a second sliding support rod, the first sliding support rod and the second sliding support rod are respectively arranged parallel to the main scale base, the cross-section of the main scale base is rectangular, the first sliding support rod and the second sliding support rod are respectively arranged corresponding to the two corner positions of the same long side of the rectangle, the cross-section of the first sliding support rod and the second sliding support rod adopts a circular structure, rectangle, square, triangle, ellipse, dovetail shape, star shape or other shape, and the cross-section shape of the first sliding support rod and the second sliding support rod is the same or different.

[0009] When the main scale is used for a digital caliper, a fixed grid is attached to the main scale, and a scale film is attached to the outer side of the fixed grid. A rectangular receiving groove is provided on the main scale base, and the fixed grid and scale film are placed within the receiving groove. When the main scale is used for a vernier caliper, the scale lines can be engraved on the front of the main scale base, and the vernier plate is fixed to the right scale frame by tightening screws. When the main scale is used for a dial caliper, a receiving groove is provided on the upper side of the main scale base, and the lower side is engraved. The rack is then screwed into the receiving groove, and the dial display module is also screwed to the right scale frame mounting bracket. This utility model is mainly described for digital calipers, but is not limited to digital calipers.

[0010] The fixed scale module is fixedly installed at one end of the main scale. A fastening screw hole is opened on the main scale. The fixed scale module is fixedly installed at the fastening screw hole position through the fastening screw of the left scale frame. A limit screw hole is opened at the other end of the main scale. A buffer gasket is put on the limit screw hole and installed in the limit screw hole of the main scale.

[0011] The fixed scale module includes a fixed scale mounting frame and a left scale frame. The fixed scale mounting frame and the left scale frame are fixed together. The fixed scale mounting frame is installed on the main scale module. The left measuring surface is fixedly installed on the left scale frame by a left fastening screw.

[0012] The fixed scale mounting frame is mounted on the main scale. A fixed gasket is provided inside the fixed scale mounting frame. The fixed gasket is provided corresponding to the upper surface of the main scale. The fixed scale mounting frame is provided with fixed gasket mounting screws. Three fixed gasket mounting screws are provided side by side.

[0013] A cover plate is installed on the fixed scale mounting frame. The cover plate is arranged in front of the main scale and is fixed to the fixed scale mounting frame by cover plate mounting screws.

[0014] The sliding scale module includes a right scale frame mounting frame, a right scale frame and a slider. The right scale frame mounting frame and the right scale frame are fixed together. Sliding support rod mounting grooves are respectively opened on the right scale frame mounting frame at positions corresponding to the first sliding support rod and the second sliding support rod on the main scale module. The slider is set in the sliding support rod mounting groove. The first sliding support rod and / or the second sliding support rod are inserted in the slider, and multiple sliders can slide freely on the first sliding support rod and the second sliding support rod at the same time.

[0015] A slider limiting groove is provided in the sliding support rod installation groove, and a slider limiting convex ring is provided on the outside of the slider. When the slider is installed in the sliding support rod installation groove, the slider limiting convex ring will be stuck in the slider limiting groove.

[0016] The right ruler frame mounting frame is provided with a slider adjusting screw at a position corresponding to the slider, and more than one slider adjusting screw is provided corresponding to each slider.

[0017] A sliding gasket is provided in the right scale frame mounting frame, and the sliding gasket is provided corresponding to the upper surface of the main scale. The right scale frame mounting frame is provided with a sliding gasket mounting screw, a digital display module mounting screw and a sliding scale module locking screw. The sliding gasket mounting screw is provided corresponding to one end of the sliding gasket. There are four digital display module mounting screws, which are respectively provided corresponding to the four hole positions on the upper and lower sides of the digital display housing. The sliding scale module locking screw is provided corresponding to the middle position of the sliding gasket.

[0018] The right measuring surface is fixedly mounted on the right ruler frame via a right fastening screw.

[0019] The right scale frame mounting frame is provided with a digital display module, which is fixed to the right scale frame mounting frame by digital display module mounting screws.

[0020] The digital display module includes a digital display housing, a control panel, a display screen, a display screen protective cover and an internal bracket. The display screen and buttons are installed on the internal bracket by mounting screws. The internal bracket with installed parts is fixed to the right scale frame mounting bracket with screws. The digital display housing covers the internal bracket and is tightened to the right scale frame mounting bracket with the digital display module mounting screws. There is more than one push button switch installed on the control panel, and there is more than one button installed on the internal bracket. The buttons and push buttons are arranged in a one-to-one correspondence. The display screen protective cover is arranged on the digital display housing at the front end of the display screen. A battery is installed on the control panel. A data interface is installed on the control panel. A data port cover is installed on the digital display housing at the position corresponding to the data interface. A battery cover is provided on the digital display housing at the position corresponding to the battery position. An outward protruding push position is provided at the bottom of the digital display housing.

[0021] The main scale module is provided with an adjustment module, and the adjustment module is arranged relative to the sliding scale module.

[0022] The adjustment module includes a fine-motion frame, a fine-motion slider, a fine-motion screw, an adjusting nut and a limit nut. The fine-motion frame is provided with a second sliding support rod mounting groove at the positions corresponding to the first sliding support rod and the second sliding support rod on the main scale, and the fine-motion slider is arranged in the second sliding support rod mounting groove.

[0023] A micro-slider limiting groove is provided in the second sliding support rod installation groove, and a micro-slider limiting convex ring is provided on the outside of the micro-slider, and the micro-slider limiting convex ring is clamped in the micro-slider limiting groove.

[0024] A fine motion screw is inserted under the fine motion frame, an adjusting nut is sleeved on the fine motion screw, and blocks are respectively provided at the front and rear of the adjusting nut. A limit nut is sleeved on the fine motion screw, and the limit nut is arranged in the digital display module.

[0025] A fine-motion gasket is provided in the fine-motion frame, and the fine-motion gasket is provided corresponding to the upper surface of the main scale. The fine-motion frame is provided with a fine-motion gasket mounting screw and an adjustment module locking screw. There are two fine-motion gasket mounting screws, which are respectively provided corresponding to the two ends of the fine-motion gasket.

[0026] The beneficial effect of the utility model is that the utility model forms the main structure of the ruler body by cooperating with the main ruler base through the sliding support rod, which can not only ensure the strength of the main ruler, but also effectively reduce the weight of the caliper, and at the same time ensure the smooth sliding of the sliding ruler.

[0027] The present invention will be further described below with reference to the accompanying drawings and specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model.

[0029] Figure 2 This is a schematic diagram of the structure of the utility model in an exploded state.

[0030] Figure 3 It is a schematic diagram of the three-dimensional structure of the digital display module in this utility model.

[0031] Figure 4 This is a schematic diagram of the partially exploded structure of the digital display module in the present invention.

[0032] Figure 5 It is a schematic diagram of the partial cross-sectional structure of the utility model.

[0033] Figure 6 This is a schematic diagram of the cross-sectional structure of a sliding ruler of the present invention.

[0034] Figure 7 This is a schematic diagram of the cross-sectional structure of the fixed ruler part of the utility model.

[0035] Figure 8 It is a schematic diagram of the top structure of the utility model.

[0036] Figure 9 It is a rear view structural diagram of the utility model.

[0037] In the figure, 1-main scale module, 11-main scale, 111-main scale base, 12-first sliding support rod, 13-second sliding support rod, 14-fixed grid, 15-scale membrane, 16-fastening screw hole, 17-limiting screw hole, 18-limiting screw, 19-buffer gasket, 2-sliding scale module, 21-digital display module, 22-right scale frame, 23-right measuring surface, 24-right fastening screw, 25-sliding support rod mounting slot, 26-slider limiting slot, 27-slider, 28-slider limiting convex ring, 29-slider first adjusting screw, 210-slider second adjusting screw, 211-slider third adjusting screw, 212-sliding gasket, 213-sliding gasket mounting screw, 214-digital display module mounting screw, 215-sliding scale module locking screw, 216-screw, 217-digital display housing, 218 -Display screen protective cover, 219-button, 220-battery cover, 221-data port cover, 222-data interface, 223-control panel, 224-display screen, 225-battery, 226-key switch, 227-mounting screw, 228-internal bracket, 229-push position, 230-right scale frame mounting bracket, 3-fixed scale module, 31-fixed scale mounting bracket, 32-left scale frame, 33-left measuring surface, 34-left fastening screw, 35-left scale frame fastening screw, 36-fixing gasket, 37-fixing gasket mounting screw, 38-cover, 39-cover mounting screw, 4-adjustment module, 41-micro-motion frame, 42-micro-motion slider, 43-micro-motion gasket, 44-micro-motion gasket mounting screw, 45-adjustment module locking screw, 46-micro-motion screw, 47-adjustment nut, 48-limit nut. DETAILED DESCRIPTION

[0038] This embodiment is a preferred implementation of the present utility model. Other embodiments whose principles and basic structures are the same or similar to those of this embodiment are within the protection scope of the present utility model.

[0039] Please refer to the attached Figure 1 To the attached Figure 9The utility model mainly protects a light-weight and smooth-sliding caliper, which mainly includes a main scale module 1, a sliding scale module 2 and a fixed scale module 3. The fixed scale module 3 is fixedly installed on the main scale module 1, and the sliding scale module 2 is arranged on the main scale module 1 and can slide freely along the length direction of the main scale module 1. The main scale module 1 includes a main scale 11, a fixed grid 14, a scale film 15, a limit screw 18 and a buffer gasket 19. The structural features of the main scale 11 are mainly divided into a main scale base 111 and a sliding support rod. The sliding support rod is fixedly installed with the main scale base 111. A slider 27 is provided in the sliding scale module 2 corresponding to the sliding support rod, and the slider 27 is mounted on the sliding support rod. In the present invention, the main scale base 111 and the sliding support rod cooperate to form the main support structure of the main scale 11, which can meet the sliding requirements of the sliding scale module 2 and the strength requirements of the main scale 11 in the width and thickness directions, making it less likely to deform. The main scale 11 is preferably made of aluminum alloy, which still meets the strength requirements and can replace the traditional stainless steel main scale, thereby greatly reducing the weight of the entire product. In specific implementation, the main scale 11 can also be made of lightweight materials such as titanium alloy and carbon fiber. The present invention achieves both the original functions and the shortcomings of the original structure by further splitting and reorganizing the various structural elements of the caliper and the corresponding implementation effects in detail. For example, the main scale 11 is clearly subdivided into a first sliding support rod 12 and a second sliding support rod 13 with guiding and limiting functions, there is a side plane of the main scale base 111 for fastening and locking the sliding scale module locking screw 215, there is an upper plane of the main scale base 111 for realizing a fixed grid groove structure or realizing the position of the engraved lines, and there is a main scale cross-section that can both reduce the weight and ensure the strength of the main scale 11, etc.

[0040] In this embodiment, there are two sliding support rods, namely the first sliding support rod 12 and the second sliding support rod 13. The first sliding support rod 12 and the second sliding support rod 13 are respectively arranged parallel to the main scale base 111. In the present invention, the direction of the caliper when it is normally used, that is, Figure 5The directions shown in the figure are described as directions to make the description simpler and clearer. In this embodiment, the first sliding support rod 12 is fixedly arranged above the main scale 11, and the second sliding support rod 13 is fixedly arranged below the main scale 11. Preferably, the first sliding support rod 12 and the second sliding support rod 13 are integrally arranged with the main scale base 111. In specific implementation, the first sliding support rod 12 and the second sliding support rod 13 can also be separately arranged with the main scale 11, and then fixed together by screws, etc., which can also achieve the same function. In this embodiment, the cross-section of the main scale base 111 is similar to a rectangle, and the first sliding support rod 12 and the second sliding support rod 13 are respectively arranged at the two corners of the same long side of the rectangle. When the strength requirements are met, this structure is the most stable. In specific implementation, other settings can also be used.

[0041] In this embodiment, the cross-sections of the first sliding support rod 12 and the second sliding support rod 13 are circular. In specific implementations, the cross-sections of the first sliding support rod 12 and the second sliding support rod 13 may also be rectangular, square, triangular, elliptical, dovetail, star-shaped, or other shapes, as long as they can meet the sliding requirements. The first sliding support rod 12 and the second sliding support rod 13 may have the same cross-sectional shape, such as: the cross-sections of the first sliding support rod 12 and the second sliding support rod 13 are both circular. Alternatively, they may have different cross-sectional shapes, such as: the cross-section of the first sliding support rod 12 is circular, and the cross-section of the second sliding support rod 13 is square or other shaped.

[0042] In this embodiment, two sliding support rods are used as an example. In specific implementation, only one may be provided, or one side of the main ruler base 111 may be used as another sliding support rod.

[0043] In this embodiment, the caliper is a digital display caliper. However, the structure of this utility model can also be applied to traditional dial calipers and vernier calipers. When used in a traditional mechanical caliper, corresponding scale markings are provided on the main scale 11. In this embodiment, a fixed grid 14 is attached to the main scale 11, and a scale film 15 is attached to the outside of the fixed grid 14 to protect it. The fixed grid 14 cooperates with the detection circuit within the sliding scale module 2 to perform dimensional measurements. In this embodiment, a stripe-shaped receiving groove is preferably provided on the main scale 11, and the fixed grid 14 and the scale film 15 are disposed within the receiving groove.

[0044] In this embodiment, the fixed scale module 3 is fixedly mounted on one end of the main scale 11. A fastening screw hole 16 is defined in the main scale 11. The fixed scale module 3 is fixedly mounted at the position of the fastening screw hole 16 by a left scale frame fastening screw 35. A limit screw hole 17 is defined at the other end of the main scale 11. A limit screw 18 covered with a buffering washer 19 is inserted into the limit screw hole 17. The limit screw 18 and the buffering washer 19 block the sliding scale module 2, preventing the sliding scale module 2 from sliding out of this end. The buffering washer 19 can cushion the impact when colliding with the sliding scale module 2.

[0045] In this embodiment, the fixed scale module 3 is fixedly mounted on one end of the main scale 11. Figure 5 The left side is shown in the figure. During implementation, a mirrored structure can also be made and fixed on the right side. The right side can be suitable for users who are accustomed to using their left hand. The fixed ruler module 3 mainly includes a fixed ruler mounting frame 31 and a left ruler frame 32. The fixed ruler mounting frame 31 and the left ruler frame 32 are arranged in one piece. During implementation, the fixed ruler mounting frame 31 and the left ruler frame 32 can also be arranged separately and then fixed together by screws, glue and other fixing means. The fixed ruler mounting frame 31 is used to install the fixed ruler module 3 on the main ruler module 1. The left ruler frame 32 serves as a reference surface on one side during measurement. In this embodiment, a left measuring surface 33 is fixedly installed on the left ruler frame 32 by a left fastening screw 34. When in use, the left measuring surface 33 is used as a reference surface. During implementation, the left measuring surface 33 can be directly used as a reference surface without setting the left measuring surface 33. Setting the left measuring surface 33 can reduce the wear of the left ruler frame 32 during use and extend its service life. The fixed scale mounting bracket 31 is mounted on the main scale 11. A fixing washer 36 is disposed within the fixed scale mounting bracket 31, corresponding to the upper surface of the main scale 11. The fixed scale mounting bracket 31 is provided with fixing washer mounting screws 37, which compress the fixing washer 36 to achieve relative fixation between the fixed scale mounting bracket 31 and the main scale 11. In this embodiment, three fixing washer mounting screws 37 are arranged side by side. Adjusting the tightness of these three fixing washer mounting screws 37 allows for fine-tuning of the inclination angle between the left scale frame 32 and the main scale 11. In this embodiment, a cover plate 38 is mounted on the fixed scale mounting bracket 31. The cover plate 38 is positioned in front of the main scale 11 and is secured to the fixed scale mounting bracket 31 via cover plate mounting screws 39.

[0046] In this embodiment, the sliding scale module 2 mainly includes a right scale frame mounting frame 230, a right scale frame 22 and a slider 27. The right scale frame mounting frame 230 is provided with a sliding support rod mounting groove 25 at the position corresponding to the first sliding support rod 12 and the second sliding support rod 13 on the main scale module 1. The slider 27 is arranged in the sliding support rod mounting groove 25. In this embodiment, the attached Figure 5It is shown that the right ruler frame 22 is located on the right side of the left ruler frame 32, so it is defined as the right ruler frame 22. The right ruler frame mounting frame 230 and the right ruler frame 22 are set as one piece. During specific implementation, the right ruler frame mounting frame 230 and the right ruler frame 22 can also be set separately, and then fixed together by screws, glue and other fixing means. In this embodiment, two sliders 27 are provided in each sliding support rod mounting groove 25. During specific implementation, the number of sliders 27 in the sliding support rod mounting groove 25 can be set according to actual needs. One or more sliders can be set. The first sliding support rod 12 and / or the second sliding support rod 13 are inserted into the slider 27, and the slider 27 can slide freely on the first sliding support rod 12 and / or the second sliding support rod 13. The internal shape of the sliding support rod mounting groove 25 matches the external shape of the slider 27, allowing the slider 27 to be precisely installed within the sliding support rod mounting groove 25. The internal shape of the slider 27 matches the external shape of the first sliding support rod 12 and / or the second sliding support rod 13, allowing the first sliding support rod 12 and / or the second sliding support rod 13 to be precisely inserted within the slider 27. This ensures that the first sliding support rod 12 and / or the second sliding support rod 13 can slide freely while preventing them from shifting or shaking during the sliding process, which could affect measurement accuracy. In this embodiment, the slider 27 can be made of a plastic material, preferably a modified nylon material, which not only ensures its mechanical strength but also prevents it from causing wear to the first sliding support rod 12 and the second sliding support rod 13 during use, thereby ensuring its service life.

[0047] In this embodiment, a slider stop slot 26 is defined within the sliding support rod mounting slot 25, and a slider stop protrusion 28 is disposed on the exterior of the slider 27. When the slider 27 is installed within the sliding support rod mounting slot 25, the slider stop protrusion 28 engages within the slider stop slot 26, preventing the slider 27 from sliding along with the first sliding support rod 12 and the second sliding support rod 13 during use. In this embodiment, slider adjustment screws are disposed at positions corresponding to the sliders 27 on the right ruler frame mounting bracket 230. At least one slider adjustment screw is disposed for each slider 27, and the specific number of slider adjustment screws can be set based on actual needs. The slider adjustment screws can be used to fine-tune the shape of the slider 27 to better fit the first sliding support rod 12 and the second sliding support rod 13, thereby ensuring its effectiveness in use.

[0048] In this embodiment, a sliding gasket 212 is provided in the right scale frame mounting frame 230, and the sliding gasket 212 is provided corresponding to the upper surface of the main scale base 111. A sliding gasket mounting screw 213 and a sliding scale module locking screw 215 are provided on the right scale frame mounting frame 230. The sliding gasket mounting screw 213 is provided corresponding to one end of the sliding gasket 212, and the sliding gasket 212 and the right scale frame mounting frame 230 can be installed together through the sliding gasket mounting screw 213. The sliding scale module locking screw 215 is provided corresponding to the middle position of the sliding gasket 212. The relative fixation between the right scale frame 22 and the main scale base 111 can be achieved by tightening the sliding scale module locking screw 215, that is, the right scale frame 22 is locked.

[0049] In this embodiment, the right ruler frame 22 serves as the reference surface for the other side during measurement. In this embodiment, a right measuring surface body 23 is fixedly mounted on the right ruler frame 22 by a right fastening screw 24. When in use, the right side measuring surface 23 is used as the reference surface. In specific implementation, the right measuring surface body 23 may not be provided, and the right ruler frame 22 may be directly used as the reference surface. Providing the right measuring surface body 23 can reduce the wear on the right ruler frame 22 during use and extend its service life.

[0050] In this embodiment, the caliper is a digital display type. In specific implementation, the structure of the present invention can also be applied to traditional dial calipers and vernier calipers. When used in a traditional dial caliper, the front surface of the main scale 11 must be grooved and engraved with corresponding structures. When used in a traditional vernier caliper, corresponding scale markings are provided at corresponding positions on the right scale frame mounting bracket 230, or a vernier piece with engraved lines is fastened to the right scale frame 22. In this embodiment, the caliper is a digital display type. A digital display module 21 is mounted on the right scale frame mounting bracket 230. The digital display module 21 is fixed to the right scale frame mounting bracket 230 via digital display module mounting screws 214.

[0051] In this embodiment, the digital display module 21 includes a digital display housing 217, a control panel 223, a display screen 224, a display screen protective cover 218 and an internal bracket 228. The display screen 224 and the button 219 are mounted on the internal bracket 228 by means of mounting screws 227. The internal bracket 228 with the installed parts is fixedly mounted on the right scale frame mounting bracket 230 with screws 216. The digital display housing 217 covers the internal bracket 228 and is tightened on the right scale frame mounting bracket 230 with the digital display module mounting screws 214. One or more key switches 226 are mounted on the control panel 223, and one or more buttons 219 are mounted on the internal bracket 228. The button 219 A display screen protective cover 218 is provided on the digital display housing 217 at the front of the display screen 224, corresponding to the pushbutton switches 226. This protects the display screen 224. A battery 225 is mounted on the control board 223. In this embodiment, the battery 225 is a rechargeable battery (or a replaceable battery). A data interface 222 is mounted on the control board 223, which allows the battery 225 to be charged and measurement data to be transmitted externally via the data structure 222. A data port cover 221 is mounted on the digital display housing 217 at a position corresponding to the data interface 222 to protect the data interface 222. In this embodiment, a battery cover 220 is mounted on the digital display housing 217 at a position corresponding to the battery 225. This battery cover 220 can be opened to allow for battery replacement or maintenance.

[0052] In this embodiment, an outwardly protruding push position 229 is provided at the bottom of the digital display housing 217 to facilitate the user to perform a pushing operation during use.

[0053] In this embodiment, the main scale module 1 is further provided with an adjustment module 4 (the adjustment module 4 is an optional structure, which can be assembled and used according to actual needs. If it is not needed, it can be selected not to be assembled, which does not affect the main function of the present invention). The adjustment module 4 is arranged relative to the sliding scale module 2. During measurement, the sliding scale module 2 can be fine-tuned through the adjustment module 4 to make the measurement more accurate. In this embodiment, the adjustment module 4 includes a fine-motion frame 41, a fine-motion slider 42, a fine-motion screw 46, an adjusting nut 47 and a limit nut 48. The fine-motion frame 41 is provided with second sliding support rod mounting grooves at positions corresponding to the first sliding support rod 12 and the second sliding support rod 13 on the main scale module 1, and the fine-motion slider 42 is arranged in the second sliding support rod mounting groove. In this embodiment, a fine-motion slider 42 is arranged in each second sliding support rod mounting groove. During specific implementation, the number of fine-motion sliders 42 in the second sliding support rod mounting groove can be set according to actual needs, and two or more can be set. The first sliding support rod 12 and / or the second sliding support rod 13 are inserted into the fine-motion slider 42, and the fine-motion slider 42 can slide freely on the first sliding support rod 12 and / or the second sliding support rod 13. The internal shape of the second sliding support rod mounting groove matches the external shape of the fine-motion slider 42, allowing the fine-motion slider 42 to be precisely installed in the second sliding support rod mounting groove. The internal shape of the fine-motion slider 42 matches the external shape of the first sliding support rod 12 and / or the second sliding support rod 13, allowing the first sliding support rod 12 and / or the second sliding support rod 13 to be precisely inserted into the fine-motion slider 42. This ensures that the fine-motion slider 42 can slide freely while preventing displacement, shaking, and the like during sliding, which could affect measurement accuracy. In this embodiment, the fine-motion slider 42 can be made of a plastic material, preferably a modified nylon material, which not only ensures its mechanical strength but also prevents wear on the first and second sliding support rods 12 and 13 during use, thereby ensuring its service life.

[0054] A micro-slider limiting groove is provided in the second sliding support rod mounting groove, and a micro-slider limiting convex ring is provided on the outside of the micro-slider 42. When the micro-slider 42 is installed in the second sliding support rod mounting groove, the micro-slider limiting convex ring will be stuck in the micro-slider limiting groove to prevent it from sliding along with the first sliding support rod 12 and the second sliding support rod 13 during use.

[0055] In this embodiment, a fine-motion screw 46 is inserted under the fine-motion frame 41, and an adjusting nut 47 is mounted on the fine-motion screw 46. A limit nut 48 is mounted on the fine-motion screw 46, and the fine-motion screw 46 can be fastened to the sliding module 2 through the limit nut 48. Blocks are respectively provided at the front and rear of the adjusting nut 47 to ensure that the adjusting nut 47 can drive the adjusting module 4 to move forward and backward during rotation. When the locking screw 45 of the adjusting module is tightened to rotate the adjusting nut 47, the fine-motion screw 46 can drive the sliding scale module 2 to move left and right, so as to fine-tune the reference surface of the right scale frame 22 and make the measurement accuracy higher. When the adjustment module 4 is not assembled in the present invention, the sliding scale module 2 can be directly blocked by the limit screw 18 and the buffer gasket 19 to prevent the sliding scale module 2 from sliding out from this end, and the buffer gasket 19 can play a role in buffering the impact when colliding with the sliding scale module 2; when the adjustment module 4 is assembled in the present invention, the adjustment module 4 slides together with the sliding scale module 2, and the limit screw 18 and the buffer gasket 19 can be used to block the adjustment module 4 to prevent the adjustment module 4 and the sliding scale module 2 from sliding out from this end, and the buffer gasket 19 can play a role in buffering the impact when colliding with the adjustment module 4.

[0056] In this embodiment, a fine-motion gasket 43 is provided in the fine-motion frame 41, and the fine-motion gasket 43 is provided corresponding to the upper surface of the main scale 11. The fine-motion gasket mounting screw 44 and the adjustment module locking screw 45 are provided on the fine-motion frame 41. There are two fine-motion gasket mounting screws 44, which are respectively corresponding to the two ends of the fine-motion gasket 43. The tightness of the two fine-motion gasket mounting screws 44 can be adjusted to ensure that the fine-motion gasket 43 will not be pulled away when it moves relative to the main scale 11. The adjustment module locking screw 45 realizes the relative fixation between the fine-motion frame 41 and the main scale 11, that is, locks the adjustment module 4.

[0057] During use, the object to be measured is placed between the left measuring surface 33 on the left ruler frame 32 and the right measuring surface 23 on the right ruler frame 22. The right ruler frame 22 is then pushed to measure the object, and the dimensions of the object to be measured can be read from the data displayed on the digital display module 21. As the right ruler frame 22 slides, the slider 27 slides relative to the first and second sliding support rods 12 and 13, resulting in smooth and stable sliding, and minimal wear on the first and second sliding support rods 12 and 13.

[0058] The utility model forms a ruler body main structure by cooperating with the main ruler through the sliding support rod, which can not only ensure the strength of the main ruler, but also effectively reduce the weight of the caliper, and at the same time ensure the smooth sliding of the sliding ruler.

Claims

1. A lightweight, smooth-sliding caliper characterized by: The caliper comprises a main scale module (1), a sliding scale module (2) and a fixed scale module (3), wherein the fixed scale module (3) is fixedly mounted on the main scale module (1), the sliding scale module (2) is arranged on the main scale module (1) and can slide freely along the length direction of the main scale module (1), the main scale module (1) comprises a main scale base (111) and a sliding support rod, the sliding support rod is fixedly mounted together with the main scale base (111), a sliding block (27) is arranged in the sliding scale module (2) corresponding to the sliding support rod, and the sliding block (27) is sleeved on the sliding support rod.

2. The lightweight, smooth-sliding caliper according to claim 1, characterized in that: The sliding support rod comprises a first sliding support rod (12) and / or a second sliding support rod (13), the first sliding support rod (12) and the second sliding support rod (13) are respectively arranged in parallel with the main scale base (111), the main scale base (111) has a rectangular cross section, the first sliding support rod (12) and the second sliding support rod (13) are respectively arranged at two corner positions corresponding to the same long side of the rectangle, the cross sections of the first sliding support rod (12) and the second sliding support rod (13) adopt a circular structure, a rectangle, a square, a triangle, an ellipse, a swallowtail shape or a star shape, and the cross sections of the first sliding support rod (12) and the second sliding support rod (13) are the same or different.

3. The lightweight, smooth-sliding caliper according to claim 1, characterized in that: A fixed grid (14) is mounted on the main scale base (111), and a scale film (15) is mounted on the outer side of the fixed grid (14). A rectangular receiving groove is opened on the main scale base (111), and the fixed grid (14) and the scale film (15) are arranged in the receiving groove. A digital display module (21) is mounted on the sliding scale module (2), and the digital display module (21) is fixedly mounted together with the sliding scale module (2) by digital display module mounting screws (214).

4. The lightweight, smooth-sliding caliper according to claim 3, characterized in that: The digital display module (21) includes a digital display housing (217), a control panel (223), a display screen (224), a display screen protective cover (218) and an internal bracket (228). The display screen (224) and the button (219) are mounted on the internal bracket (228) by means of mounting screws (227). The internal bracket (228) with the installed parts is fixedly mounted on the right scale frame mounting frame (230) with screws (216). The digital display housing (217) covers the internal bracket (228) and is tightened on the right scale frame mounting frame (230) with the digital display module mounting screws (214). One or more key switches (226) are mounted on the control panel (223). The internal bracket (228) is provided with one or more buttons (219), the buttons (219) and the key switches (226) are arranged in a one-to-one correspondence, a display screen protection cover (218) is provided on the digital display housing (217) at the front end of the display screen (224), a battery (225) is provided on the control board (223), a data interface (222) is provided on the control board (223), a data port cover (221) is provided on the digital display housing (217) at a position corresponding to the data interface (222), a battery cover (220) is provided on the digital display housing (217) at a position corresponding to the battery (225), and a push position (229) protruding outward is provided at the bottom of the digital display housing (217).

5. The lightweight, smooth-sliding caliper according to claim 1, characterized in that: The fixed scale module (3) is fixedly mounted on one end of the main scale (11). A fastening screw hole (16) is provided on the main scale (11). The fixed scale module (3) is fixedly mounted at the fastening screw hole (16) by a left scale frame fastening screw (35). A limiting screw hole (17) is provided on the other end of the main scale (11). A limiting screw (18) is installed in the limiting screw hole (17).

6. The lightweight, smooth-sliding caliper according to claim 1, characterized in that: The fixed ruler module (3) includes a fixed ruler mounting frame (31) and a left ruler frame (32), the fixed ruler mounting frame (31) and the left ruler frame (32) are fixedly arranged together, the fixed ruler mounting frame (31) is mounted on the main ruler module (1), and the left ruler frame (32) is fixedly mounted with a left measuring face (33) via a left fastening screw (34); the sliding ruler module (2) includes a right ruler frame mounting frame (230), a right ruler frame (22) and a slider (27), the right ruler frame mounting frame (230) and the right ruler frame (22) are fixedly arranged together, the right ruler frame mounting frame (230) Sliding support rod mounting grooves (25) are respectively provided at positions corresponding to the first sliding support rod (12) and the second sliding support rod (13) on the main scale module (1), and a slider (27) is arranged in the sliding support rod mounting groove (25). The first sliding support rod (12) and / or the second sliding support rod (13) are inserted into the slider (27), and the slider (27) can slide freely on the first sliding support rod (12) and / or the second sliding support rod (13), and the right measuring surface (23) is fixedly installed on the right scale frame (22) by a right fastening screw (24).

7. The lightweight, smooth-sliding caliper according to claim 6, characterized in that: The fixed scale mounting frame (31) is mounted on the main scale (11), and a fixed gasket (36) is provided in the fixed scale mounting frame (31), and the fixed gasket (36) is provided corresponding to the upper surface of the main scale (11). The fixed scale mounting frame (31) is provided with a fixed gasket mounting screw (37), and three fixed gasket mounting screws (37) are provided side by side; the right scale frame mounting frame (230) is provided with a sliding gasket (212), and the sliding gasket (212) is provided corresponding to the upper surface of the main scale (11). The right ruler frame mounting frame (230) is provided with a sliding washer mounting screw (213), a digital display module mounting screw (214) and a sliding ruler module locking screw (215), the sliding washer mounting screw (213) is provided corresponding to one end of the sliding washer (212), four digital display module mounting screws (214) are provided, and are respectively provided corresponding to the four hole positions on the upper and lower sides of the digital display housing, and the sliding ruler module locking screw (215) is provided corresponding to the middle position of the sliding washer (212).

8. The lightweight, smooth-sliding caliper according to claim 6, characterized in that: A slider limiting groove (26) is provided in the sliding support rod mounting groove (25), and a slider limiting convex ring (28) is provided on the outside of the slider (27). When the slider (27) is installed in the sliding support rod mounting groove (25), the slider limiting convex ring (28) will be stuck in the slider limiting groove (26). The right scale frame mounting frame (230) is provided with a slider adjusting screw at a position corresponding to the slider (27), and more than one slider adjusting screw is provided corresponding to each slider (27).

9. The lightweight, smooth-sliding caliper according to claim 1, characterized in that: The main scale module (1) is provided with an adjustment module (4), which is arranged relative to the sliding scale module (2). The adjustment module (4) includes a micro-motion frame (41), a micro-motion slider (42), a micro-motion screw (46), an adjustment nut (47) and a limit nut (48). The micro-motion frame (41) is provided with a second sliding support rod installation groove at positions corresponding to the first sliding support rod (12) and the second sliding support rod (13) on the main scale module (1), and the micro-motion slider (42) is arranged in the second sliding support rod installation groove.

10. The light-weight, smooth-sliding caliper according to claim 9, characterized in that: A second slider limiting groove is provided in the second sliding support rod installation groove, and a second slider limiting convex ring is provided on the outside of the micro-motion slider (42), and the second slider limiting convex ring is clamped in the second slider limiting groove. A micro-motion screw (46) is inserted under the micro-motion frame (41), and an adjusting nut (47) is sleeved on the micro-motion screw (46). Blocks are provided at the front and rear of the adjusting nut (47). A limiting nut (48) is sleeved on the micro-motion screw (46), and the limiting nut (48) is provided in the digital display module (21). A micro-motion gasket (43) is provided in the micro-motion frame (41), and the micro-motion gasket (43) is provided corresponding to the upper surface of the main scale base (111). A micro-motion gasket mounting screw (44) and an adjustment module locking screw (45) are provided on the micro-motion frame (41). There are two micro-motion gasket mounting screws (44), which are respectively provided at the two ends of the micro-motion gasket (43).

Images