High-precision measuring device for faceted gemstone processing

Abstract

This utility model relates to a high-precision measuring device for faceted gemstone processing, comprising an arc plate, a first scale mark on the front side of the arc plate, a fixed arm extending towards the center of the arc plate at one end, a movable arm hinged to the extended end of the fixed arm at the center of the arc plate, a scale block slidingly engaging with the arc plate at the free end of the movable arm, a second scale mark on the front side of the scale block, the zero mark of the second scale mark being on the extension line of the center line of the movable arm, and a locking structure engaging with the arc plate on the scale block. This measuring device facilitates the measurement of faceted gemstone processing angles and improves measurement accuracy.

Description

Technical Field

[0001] This utility model relates to a high-precision measuring device for faceted gemstone processing. Background Technology

[0002] The facet angle refers to the angle between the facet of the cut and the girdle plane. In faceted gemstone processing, the processing angles of different facets of the same cut are different. Furthermore, due to the different refractive indices of gemstones of different materials, even when processing the same set of facets of the same cut, the processing angles will vary. Therefore, when processing faceted gemstones, it is necessary to change the processing angle. Accurately measuring the processing angle of faceted gemstones can enable the finished faceted gemstones to achieve the best optical effect and improve the processing quality.

[0003] Octagonal, hexagonal, and pentagonal hands are commonly used gem processing tools by gem processing technicians. For example, when using an octagonal hand to process faceted gemstones, the gemstone blank needs to be fixed to a metal adhesive rod with gemstone glue, and then the metal adhesive rod is installed and fixed in the handle of the octagonal hand. The octagonal hand is placed on the lifting platform of the gemstone grinding machine. By adjusting the height of the lifting platform, the angle between the stone blank and the grinding disc can be adjusted, thereby adjusting the processing angle.

[0004] The existing utility model patent with publication number "CN222579174U" discloses a "measuring device for faceted gemstone processing". Although the device can be used with octagonal, hexagonal and pentagonal hands to measure and lock the faceted gemstone processing angle to improve the efficiency of grinding, the output and quality of products, the measuring accuracy of the device is 1°, which cannot meet the increasingly higher processing accuracy requirements. Utility Model Content

[0005] The purpose of this invention is to provide a high-precision measuring device for faceted gemstone processing, which facilitates the measurement of faceted gemstone processing angles and improves measurement accuracy.

[0006] The technical solution of this utility model is as follows: a high-precision measuring device for faceted gemstone processing, comprising an arc plate, a first scale mark provided on the front side of the arc plate, a fixed arm extending towards the center of the arc plate at one end of the arc plate, a movable arm hinged at the extended end of the fixed arm and located at the center of the arc plate, a scale block provided at the free end of the movable arm that slides with the arc plate, a second scale mark provided on the front side of the scale block, the zero scale line of the second scale mark being on the extension line of the center line of the movable arm, and a locking structure provided on the scale block that cooperates with the arc plate.

[0007] Furthermore, the locking structure includes a radial groove provided on the outer side of the arc plate and opened along the arc direction, and a hand-tightening bolt is screwed onto the scale block, the end of the hand-tightening bolt extending into the radial groove.

[0008] Furthermore, the first scale mark consists of a first scale line from 0 to 90° and several scale numbers; the second scale mark consists of several numbers and 11 equally spaced second scale lines, the distance between the 11 second scale lines being equal to the distance between the 10 first scale lines.

[0009] Furthermore, the length of the arc plate is greater than or equal to 1 / 4 of the arc.

[0010] Furthermore, the scale block is placed on the arc plate from back to front, and the upper front end of the scale block is provided with a first protrusion extending downward and located on the front side of the arc plate, and the lower front end of the scale block is provided with a second protrusion extending upward and located on the front side of the arc plate.

[0011] Furthermore, the second scale mark is disposed on the front side of the first protrusion.

[0012] Furthermore, the fixed arm is fixedly connected to the arc plate as a whole, one end of the movable arm is hinged to the center of the arc plate on the fixed arm via a pin at the center line, and the other end of the movable arm is fixedly connected to the scale block as a whole.

[0013] Furthermore, the fixed arm and the movable arm have a flat side that is used to fit against the lifting platform, octagonal plate, hexagonal plate or pentagonal plate.

[0014] Furthermore, the arc plate, fixed arm, and movable arm are transparent plates.

[0015] Furthermore, the scale block is a transparent plate.

[0016] Compared with the prior art, the present invention has the following advantages: Based on the utility model patent "CN222579174U Measuring Device for Faceted Gemstone Processing", this measuring device upgrades the pointer to a scale block with a second scale mark (vernier caliper pointer), which not only facilitates the measurement of faceted gemstone processing angles and improves grinding efficiency, but also improves measurement accuracy, increasing the angle measurement accuracy from 1° to 0.1°, thereby further improving product output and quality. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 ; Figure 2 This is a structural schematic diagram from another perspective of the present invention; Figure 3 This is a front view of the present invention (at a 45° angle). Figure 4 This is a cross-sectional view of the locking structure of this utility model; Figure 5 This is an example diagram of the 0° included angle state of this utility model; Figure 6 This is an example diagram of the 0.7° included angle state of this utility model; Figure 7 This is an example diagram of the 23.5° included angle state of this utility model; In the diagram: 1-Arc plate 11-First scale line 12-Radial groove 2-Fixed arm 21-Pin 3-Moving arm 4-Scale block 41-Second scale line 42-Hand tightening bolt 43-First protrusion 44-Second protrusion. Detailed Implementation

[0018] To make the above-mentioned features and advantages of this utility model more easily understood, specific embodiments are described below in conjunction with the accompanying drawings, but this utility model is not limited thereto.

[0019] refer to Figures 1 to 7 A high-precision measuring device for faceted gemstone processing includes an arc plate 1. A first scale mark (diagram scale) is provided on the front side of the arc plate. A fixed arm 2 extending towards the center of the arc plate is provided at one end of the arc plate. A movable arm 3 is hinged to the extended end of the fixed arm, located at the center of the arc plate. A scale block 4, which slides with the arc plate, is provided at the free end of the movable arm. A second scale mark (pointer scale) is provided on the front side of the scale block. The zero mark of the second scale mark is on the extension line of the center line of the movable arm, so that the zero mark of the second scale mark can be used as a pointer. The accuracy is improved by the cooperation of the first and second scale marks. A locking structure is provided on the scale block to cooperate with the arc plate, so that it can be locked after the desired angle is reached.

[0020] In this embodiment, the locking structure includes a radial groove 12 formed on the outer side of the arc plate along the arc direction. A hand-tightening bolt 42 is screwed onto the scale block, with the end of the hand-tightening bolt extending into the radial groove. This allows the hand-tightening bolt to engage with the bottom surface of the groove when tightened downwards, locking the scale block. When the hand-tightening bolt is loosened, the scale block can move. Alternatively, the locking structure can also employ a groove on the back or front side of the arc plate, with locking achieved by a hand-tightening bolt screwed onto the scale block.

[0021] In this embodiment, the first scale mark consists of a first scale line 11 from 0 to 90° and several scale numbers; the second scale mark consists of several numbers and 11 equally spaced second scale lines 41, the distance between the 11 second scale lines is equal to the distance between the 10 first scale lines, so as to improve accuracy.

[0022] Specifically (instructions for use with angles accurate from 1° to 0.1°): like Figure 4 As shown (the included angle is 0° at this point), the second scale indicator on the scale block consists of 11 second scale lines (10 divisions), numbered 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0. Due to the small distance, only 0, 2, 4, 6, 8, 0 are marked. The first "0" in the counter-clockwise direction on the scale block corresponds to 0°, and the last "0" in the counter-clockwise direction points to 9°, meaning 10 divisions represent 9° (each division is 0.9°, with an accuracy of 0.1°). When the first "0" of the second scale indicator exceeds 0° but does not reach 1°, it is necessary to check which of the second scale lines 1 to 9 aligns with the first scale line on the arc plate; for example... Figure 5 As shown, at this point, the pointer mark "7" on the second scale is aligned with the 7° mark on the first scale of the arc plate (protractor). This mark represents the angle of 0.7° between the fixed arm and the movable arm. Figure 6 As shown, the included angle is 23.5°. Figure 3 As shown, the included angle is 45°.

[0023] In this embodiment, the length of the arc plate is greater than or equal to 1 / 4 of the arc, so that the first scale mark can be better set on the arc plate.

[0024] In this embodiment, in order to achieve sliding engagement between the scale block and the arc plate, the scale block is placed on the arc plate from back to front. The upper front end of the scale block is provided with a first protrusion 43 extending downward and located on the front side of the arc plate, and the lower front end of the scale block is provided with a second protrusion 44 extending upward and located on the front side of the arc plate. There is a certain distance between the first protrusion and the second protrusion so as to expose the first scale mark.

[0025] In this embodiment, the second scale mark is disposed on the front side of the first protrusion, so as to facilitate finer precision in conjunction with the first scale mark.

[0026] In this embodiment, the fixed arm is fixedly connected to the arc plate as a whole, one end of the movable arm is hinged to the center of the arc plate on the fixed arm via a pin 21 at the center line, and the other end of the movable arm is fixedly connected to the scale block as a whole.

[0027] In this embodiment, the fixed arm and the movable arm are flat on the side that is in contact with the lifting platform, octagonal plate, hexagonal plate or pentagonal plate, so as to better fit with the upper surface of the lifting platform or the end face of the octagonal plate.

[0028] In one embodiment, the arc plate may be a transparent plate, and the fixed arm and the movable arm may be transparent plates.

[0029] In one embodiment, the scale block may be a transparent plate.

[0030] Working principle: The processing angle is determined by measuring the angle between the octagonal plate and the lifting platform. This angle is the faceting processing angle. For the specific usage method and calculation process of this measuring device and the octagonal plate of the octagonal hand, please refer to the utility model patent "CN222579174U Measuring device for faceted gemstone processing".

[0031] If the terms "first" and "second" are used in the above description to define the components, those skilled in the art should know that the use of "first" and "second" is only for the convenience of distinguishing the components in the description. Unless otherwise stated, the above terms have no special meaning.

[0032] If this utility model discloses or relates to mutually fixedly connected parts or structural components, then unless otherwise stated, a fixed connection can be understood as: a detachable fixed connection (e.g., using bolts or screws) or a non-detachable fixed connection (e.g., riveting or welding). Of course, mutually fixed connections can also be replaced by an integral structure (e.g., manufactured using a casting process) (except where it is obviously impossible to use an integral forming process).

[0033] In addition, unless otherwise stated, the terms used to indicate positional relationships or shapes in any of the technical solutions disclosed in this utility model above include states or shapes that are similar to, close to, or approximate with them.

[0034] Any component provided by this utility model can be assembled from multiple individual components, or it can be a single component manufactured by a one-piece molding process.

[0035] The above description is only a preferred embodiment of the present utility model. All equivalent changes and modifications made within the scope of the patent application of the present utility model shall be covered by the present utility model.

Claims

1. A high-precision measuring device for faceted gemstone processing, comprising a circular arc plate, characterized in that, The front side of the arc plate is provided with a first scale mark. One end of the arc plate is provided with a fixed arm extending towards the center of the arc plate. The extended end of the fixed arm, located at the center of the arc plate, is hinged with a movable arm. The free end of the movable arm is provided with a scale block that slides with the arc plate. The front side of the scale block is provided with a second scale mark. The zero mark of the second scale mark is on the extension line of the center line of the movable arm. The scale block is provided with a locking structure that cooperates with the arc plate.

2. The high-precision measuring device for processing a faceted gemstone according to claim 1, characterized in that, The locking structure includes a radial groove provided on the outer side of the arc plate and opened along the arc direction. A hand-tightening bolt is screwed onto the scale block, and the end of the hand-tightening bolt extends into the radial groove.

3. The high-precision measuring device for processing a faceted gemstone according to claim 1 or 2, characterized in that, The first scale mark consists of a first scale line from 0 to 90° and several scale numbers; the second scale mark consists of several numbers and 11 equally spaced second scale lines, the distance between the 11 second scale lines being equal to the distance between the 10 first scale lines.

4. The high-precision measuring device for processing a faceted gemstone according to claim 3, characterized in that, The length of the arc plate is greater than or equal to 1 / 4 of the arc.

5. The high-precision measuring device for processing of a faceted gemstone according to claim 1, 2 or 4, characterized in that, The scale block is placed on the arc plate from back to front. The upper front end of the scale block is provided with a first protrusion that extends downward and is located on the front side of the arc plate, and the lower front end of the scale block is provided with a second protrusion that extends upward and is located on the front side of the arc plate.

6. The high-precision measuring device for processing a faceted gemstone according to claim 5, characterized in that, The second scale mark is located on the front side of the first protrusion.

7. The high-precision measuring device for processing of faceted gems according to claim 1, 2, 4 or 6, characterized in that, The fixed arm is fixedly connected to the arc plate as one unit. One end of the movable arm is hinged to the center of the arc plate on the fixed arm via a pin at the center line. The other end of the movable arm is fixedly connected to the scale block as one unit.

8. The high-precision measuring device for processing of a faceted gemstone according to claim 1, 2, 4 or 6, characterized in that, The fixed arm and movable arm are used to contact the lifting platform, octagonal plate, hexagonal plate or pentagonal plate, and the sides are flat.

9. The high-precision measuring device for faceted gemstone processing according to claim 1, characterized in that, The arc plate, fixed arm, and movable arm are all transparent.

10. The high-precision measuring device for processing a faceted gemstone according to claim 1 or 9, characterized in that, The scale block is a transparent plate.

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