A prism positioning fixing frame for gem refractive index detection

Abstract

The utility model relates to the field of gem detection technology, concretely to a prism positioning fixing frame for gem refractive index detection, including refractometer body, lid, prism body and positioning device, lid rotation setting is in the refractometer body, and the positioning device sets up on the refractometer body for installing prism body, the positioning device includes mounting plate, and the inner wall fixed connection of mounting plate has installation sleeve, and installation sleeve is inserted for prism body, the utility model, through the mounting frame formed by connecting device, insert the prism body into the installation sleeve, and the automatic clamping of card piece is completed in the card slot through the limiting spring drive, and then the mounting plate is fixed in the positioning groove with bolt, after the installation sleeve is inserted into the insertion hole, the top tight portion is in abutment with the inner wall of insertion hole, improves the stable effect after the installation of whole prism body, and when disassembling subsequently, does not need to disassemble the refractometer body, only needs to disassemble the mounting plate, can take out the prism body, and then promotes the prism body, can take down the prism body.

Description

TECHNICAL FIELD

[0001] The utility model relates to a gem detection technical field especially relates to a gem refractive index detection prism positioning fixing frame. BACKGROUND

[0002] Gem refractive index is the core parameter of measuring gem optical characteristic, refers to the degree of refraction when light enters gem from air, and the numerical value is determined by gem chemical composition and crystal structure, and it is the key basis of gem identification (such as the refractive index of diamond is fixed as 2.417, and the refractive index of crystal is about 1.544-1.553).

[0003] Detection is mostly adopted "critical angle method", utilizes gem refractometer, adheres high refractive index prism (commonly used 1.81 optical glass prism) to gem, observes "bright-dark boundary line" position through ocular lens, and reads refractive index value by contrast scale, and the numerical value has uniqueness and stability, can distinguish similar appearance gem (such as distinguishing diamond and synthetic cubic zirconia, and the refractive index of the latter is 2.15), and can also assist in judging gem variety, origin and optimization processing mode (such as the refractive index of heat-treated ruby can change slightly), and it is the indispensable basic index in jewelry detection, identification and grading.

[0004] In daily work, it is found that the existing gem refractometer mainly positions the prism in the inner wall of the gem refractometer by the fixing frame when installing the prism, when the optical surface of the prism is scratched and edge collapse due to long-term use, the operator needs to disassemble the shell of the refractometer first, and then disassemble the fixing frame and the prism, so that the whole process is not only cumbersome, and the internal optical elements are also easy to be damaged after the shell is opened. UTILITY MODEL CONTENTS

[0005] The utility model aims at solving the problem that the existing gem refractometer mainly positions the prism in the inner wall of the gem refractive index detection prism positioning fixing frame by the fixing frame when installing the prism, and the operator needs to disassemble the shell of the refractometer first, and then disassemble fixing frame and prism, so that the whole process is not only cumbersome, and the internal optical elements are also damaged after the shell is opened.

[0006] In order to realize the above-mentioned purpose, the utility model adopts the following technical scheme: a gem refractive index detection prism positioning fixing frame, including refractometer body, cover, prism body and positioning device, the cover is rotationally arranged on the refractometer body, the positioning device is arranged on the refractometer body, and is used for installing the prism body;

[0007] The positioning device comprises a mounting plate, an inner wall of the mounting plate is fixedly connected with a mounting sleeve, the mounting sleeve is used for inserting the prism body, a surface of the refractometer body is provided with a positioning groove and a insertion hole, the mounting plate is inserted with the inner wall of the positioning groove, the mounting sleeve is inserted with the inner wall of the insertion hole, two clamping pieces are slidably connected with the inner wall of the mounting sleeve, the side corresponding to the inner wall of the mounting sleeve of the clamping piece is fixedly connected with a limiting spring, both sides of the prism body are provided with clamping grooves for clamping the clamping pieces, the surface of the clamping piece is further provided with a jacking part for limiting the movement of the clamping piece after installation, the inner wall of the positioning groove is provided with a plurality of screw holes, a plurality of bolts are inserted with the inner wall of the mounting plate, and the bolts are screwedly connected with the inner walls of the screw holes, through the above-mentioned components, when the prism body is installed and positioned, the prism body is first inserted into the mounting sleeve, at this time, the clamping piece is pressed, the limiting spring is stressed, when the prism body is flush with the mounting plate and the mounting sleeve, the limiting spring drives the clamping piece to clamp into the clamping groove for limiting, then the mounting plate is installed in the positioning groove and flush with the refractometer body through the cooperation of the bolts and the screw holes, after the mounting sleeve is inserted into the insertion hole, the jacking part abuts against the inner wall of the insertion hole, and the movement of the clamping piece is limited.

[0008] Preferably, the jacking part comprises two jacking rods fixed on the surface of the clamping piece, the jacking rods are slidably connected with the inner wall of the mounting sleeve, one end of the jacking rod is flush with the outer surface of the mounting sleeve, through the above-mentioned components, after the mounting sleeve is inserted into the insertion hole, one end of the jacking rod contacts and abuts against the inner wall of the insertion hole, so that the limiting is realized.

[0009] Preferably, the surface of the jacking rod is fixedly connected with a limiting ring, the outer surface of the mounting sleeve is provided with a limiting groove, the limiting groove is used for inserting the limiting ring, through the above-mentioned components, the limiting ring cooperates with the limiting groove on the outer surface of the mounting sleeve, so that the movement range of the jacking rod of the clamping piece and the clamping piece can be limited.

[0010] Preferably, the clamping piece comprises a rectangular plate slidably connected with the inner wall of the mounting sleeve, the surface of the rectangular plate is fixedly connected with a convex part for clamping into the clamping groove.

[0011] Preferably, the clamping groove is longitudinally provided in a semicircular shape.

[0012] Preferably, the lower surface of the mounting plate is provided with two ejection assemblies.

[0013] Preferably, the ejection assembly comprises an ejection rod slidably connected with the inner wall of the mounting plate, the surface of the ejection rod is sleeved with an ejection spring, both ends of the ejection spring are fixedly connected with the ejection rod and the inner wall of the mounting plate respectively, through the above-mentioned components, after the bolts are disconnected with the screw holes, the ejection spring cooperates with the ejection rod, so that the mounting plate can be pushed out of the positioning groove, so as to be taken subsequently.

[0014] Compared with the prior art, the utility model has the advantages and positive effects that:

[0015] 1. The utility model discloses a mounting rack formed through the connecting device, inserts the prism body into the mounting sleeve, and the initial fixation is completed through the limiting spring drive clamping piece automatic clamping into the clamping groove, then fixes the mounting plate in the positioning groove with bolt, after the mounting sleeve is inserted into the insertion hole, the jacking part is abutted with the inner wall of the insertion hole, improves the stable effect after the whole prism body installation, and when disassembling subsequently, the refractometer body does not need to be disassembled, only needs to disassemble the mounting plate, can take out the prism body, and then pushes the prism body, can take down the prism body.

[0016] 2. The utility model discloses when disassembling, only need to unscrew the bolt, and the ejection spring will drive the ejection rod to eject the mounting plate from the positioning groove, convenient for taking operation. DRAWINGS

[0017] Figure 1 A three-dimensional structure schematic diagram of the utility model is provided for gem refractive index detection prism positioning fixing frame;

[0018] Figure 2 A partial structure schematic diagram of the utility model is provided for gem refractive index detection prism positioning fixing frame;

[0019] Figure 3 A positioning device partial structure schematic diagram of the utility model is provided for gem refractive index detection prism positioning fixing frame;

[0020] Figure 4 A three-dimensional structure schematic diagram of the utility model is provided for gem refractive index detection prism positioning fixing frame; Figure 3 Sectional structure schematic diagram;

[0021] Figure 5 A positioning device partial structure schematic diagram of the utility model is provided for gem refractive index detection prism positioning fixing frame.

[0022] Legend:

[0023] 1, refractometer body;2, cover body;3, prism body;4, positioning device;41, mounting plate;42, mounting sleeve;43, bolt;44, limiting spring;45, positioning groove;46, insertion hole;47, screw hole;48, clamping piece;481, rectangular plate;482, protruding part;49, jacking rod;410, limiting groove;411, limiting ring;412, ejection rod;413, ejection spring;414, clamping groove. Specific implementation

[0024] Please refer to Figure 1 Figure 5 ​The utility model provides a technical scheme: a prism positioning fixing frame for gem refractive index detection, including refractometer body 1, cover 2, prism body 3 and positioning device 4, cover 2 rotationally arranged on refractometer body 1, positioning device 4 sets up on refractometer body 1, for installing prism body 3, and prism body 3 is combined cubic zirconia.

[0025] Specifically, the positioning device 4 includes a mounting plate 41, the inner wall of the mounting plate 41 is fixedly connected with a mounting sleeve 42, the mounting sleeve 42 is inserted into the prism body 3, the surface of the refractometer body 1 is provided with a positioning groove 45 and a insertion hole 46, the mounting plate 41 is inserted with the inner wall of the positioning groove 45, the mounting sleeve 42 is inserted with the inner wall of the insertion hole 46, the inner wall of the mounting sleeve 42 is slidably connected with two clamping pieces 48, the clamping piece 48 is fixedly connected with a limiting spring 44 on the side corresponding to the inner wall of the mounting sleeve 42, the two sides of the prism body 3 are provided with clamping grooves 414 for clamping the clamping piece 48, the surface of the clamping piece 48 is further provided with a tightening part for limiting the movement of the clamping piece 48 after installation, the inner wall of the positioning groove 45 is provided with a plurality of screw holes 47, the inner wall of the mounting plate 41 is inserted with a plurality of bolts 43, the bolts 43 are threadedly connected with the inner wall of the screw holes 47, the clamping piece 48 includes a rectangular plate 481 slidably connected with the inner wall of the mounting sleeve 42, the surface of the rectangular plate 481 is fixedly connected with a protruding part 482 for clamping into the clamping groove 414, and the longitudinal section of the clamping groove 414 is semi-circular.

[0026] In the embodiment, when installing and positioning the prism body 3, first, the prism body 3 is inserted into the mounting sleeve 42, at this time, the clamping piece 48 is pressed, and the limiting spring 44 is stressed, when the prism body 3 is flush with the mounting plate 41 and the mounting sleeve 42, the limiting spring 44 drives the clamping piece 48 to clamp into the clamping groove 414 for limiting, then the mounting plate 41 is installed in the positioning groove 45 and flush with the refractometer body 1 by the cooperation of the bolts 43 and the screw holes 47, after the mounting sleeve 42 is inserted into the insertion hole 46, the tightening part abuts against the inner wall of the insertion hole 46 to limit the movement of the clamping piece 48.

[0027] Specifically, the tightening part includes two tightening rods 49 fixed on the surface of the clamping piece 48, the tightening rods 49 are slidably connected with the inner wall of the mounting sleeve 42, one end of the tightening rod 49 is flush with the outer surface of the mounting sleeve 42, the surface of the tightening rod 49 is fixedly connected with a limiting ring 411, the outer surface of the mounting sleeve 42 is provided with a limiting groove 410 for inserting the limiting ring 411.

[0028] In the embodiment, when the mounting sleeve 42 is inserted into the insertion hole 46, one end of the tightening rod 49 contacts and abuts against the inner wall of the insertion hole 46 to achieve limiting, and the limiting ring 411 cooperates with the limiting groove 410 on the outer surface of the mounting sleeve 42 to limit the movement range of the clamping piece 48 and the tightening rod 49.

[0029] Specifically, the lower surface of the mounting plate 41 is provided with two ejection assemblies, each of which comprises an ejection rod 412 in sliding connection with the inner wall of the mounting plate 41, and a ejection spring 413 sleeved on the surface of the ejection rod 412 and fixed at both ends to the ejection rod 412 and the inner wall of the mounting plate 41.

[0030] In this embodiment, when the bolt 43 is disconnected from the threaded hole 47, the ejection spring 413 cooperates with the ejection rod 412 to push the mounting plate 41 out of the positioning groove 45, facilitating subsequent taking.

[0031] Working principle: when installation is needed, first insert the prism body 3 into the mounting sleeve 42, which will press the protruding part 482 in the clamping piece 48, and the clamping piece 48 will drive the tightening rod 49 to move, and the limiting spring 44 will be stressed. When the side of the prism body 3 placed with the gem is flush with the mounting plate 41 and the mounting sleeve 42, the limiting spring 44 can drive the clamping piece 48 to reset, and the protruding part 482 in the clamping piece 48 can be inserted into the clamping groove 414, and the tightening rod 49 drives the limiting ring 411 to insert into the limiting groove 410. Then, the mounting plate 41 can be inserted into the mounting groove, the inner wall of the mounting groove presses the ejection rod 412, and the ejection spring 413 is stressed, and at the same time, the mounting sleeve 42 is inserted into the insertion hole 46, the tightening rod 49 abuts against the inner wall of the insertion hole 46 to achieve limiting operation. After the bolt 43 is inserted into the inner wall of the mounting plate 41 and is screwed with the threaded hole 47, the installation and positioning are realized. At this time, the prism body 3, the mounting sleeve 42, the mounting plate 41 and the refractometer body 1 are in the same plane. When disassembling, only the bolt 43 needs to be taken out of the threaded hole 47, the ejection spring 413 releases the elastic force, and the ejection rod 412 pushes the mounting plate 41 out of the mounting groove, so that the mounting plate 41 and the mounting sleeve 42 can be taken out. After the tightening rod 49 is released, the prism body 3 can be taken down by pushing it with force.

Claims

1. A prism positioning and fixing frame for gemstone refractive index testing, comprising a refractometer body (1), a cover (2), a prism body (3), and a positioning device (4), characterized in that: The cover (2) is rotatably mounted on the refractometer body (1), and the positioning device (4) is mounted on the refractometer body (1) for mounting the prism body (3). The positioning device (4) includes a mounting plate (41), and a mounting sleeve (42) is fixedly connected to the inner wall of the mounting plate (41). The mounting sleeve (42) is for the prism body (3) to be inserted. The surface of the refractometer body (1) is provided with a positioning groove (45) and a socket (46). The mounting plate (41) is inserted into the inner wall of the positioning groove (45), and the mounting sleeve (42) is inserted into the inner wall of the socket (46). Two clips (48) are slidably connected to the inner wall of the mounting sleeve (42). 48) A limiting spring (44) is fixedly connected to the side corresponding to the inner wall of the mounting sleeve (42). The two sides of the prism body (3) are provided with slots (414) for the clip (48) to be inserted. The surface of the clip (48) is also provided with a tightening part to restrict the movement of the clip (48) after installation. The inner wall of the positioning groove (45) is provided with multiple screw holes (47). The inner wall of the mounting plate (41) is provided with multiple bolts (43). The bolts (43) are threadedly connected to the inner wall of the screw holes (47).

2. The prism positioning and fixing frame for gemstone refractive index detection according to claim 1, characterized in that: The tightening part includes two tightening rods (49) fixed on the surface of the clamp (48). The tightening rods (49) are slidably connected to the inner wall of the mounting sleeve (42), and one end of the tightening rods (49) is flush with the outer surface of the mounting sleeve (42).

3. The prism positioning and fixing frame for gemstone refractive index detection according to claim 2, characterized in that: The surface of the clamping rod (49) is fixedly connected to a limiting ring (411), and the outer surface of the mounting sleeve (42) is provided with a limiting groove (410) for the limiting ring (411) to be inserted.

4. The prism positioning and fixing frame for gemstone refractive index detection according to claim 1, characterized in that: The clip (48) includes a rectangular plate (481) that is slidably connected to the inner wall of the mounting sleeve (42). The surface of the rectangular plate (481) is fixedly connected with a protrusion (482) for inserting into the slot (414).

5. The prism positioning and fixing frame for gemstone refractive index detection according to claim 4, characterized in that: The slot (414) has a semi-circular longitudinal section.

6. The prism positioning and fixing frame for gemstone refractive index detection according to claim 1, characterized in that: The lower surface of the mounting plate (41) is provided with ejection components, and there are two ejection components.

7. The prism positioning and fixing frame for gemstone refractive index detection according to claim 6, characterized in that: The ejection assembly includes an ejection rod (412) that is slidably connected to the inner wall of the mounting plate (41). An ejection spring (413) is sleeved on the surface of the ejection rod (412). The two ends of the ejection spring (413) are fixedly connected to the ejection rod (412) and the inner wall of the mounting plate (41), respectively.

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