A sample holder assembly

Abstract

The present application relates to a sample holder assembly, which comprises a base, a sample to be tested, a sample holder substrate, micro-magnets and a cover plate, wherein the sample to be tested is a wafer placed on the sample holder substrate, the sample holder substrate is a metal piece with different numbers of micro-magnets inlaid on the front and back surfaces to obtain appropriate magnetic force, and the base and the cover plate are fixed on the sample holder substrate by the magnetic force provided by the micro-magnets. According to the sample holder assembly of the present application, different numbers of micro-magnets are inlaid on the front and back surfaces of the sample holder substrate to obtain appropriate magnetic force, which is used for the rapid positioning, installation and replacement of samples on a laboratory spectrometer, so that the sample holder body obtains appropriate magnetic force in a more convenient way and the yield is improved during mass production.

Description

Technical Field

[0001] This invention relates to laboratory spectrometers, and more specifically to a sample holder assembly. Background Technology

[0002] Laboratory spectrometers are analytical instruments based on the Loland circle imaging principle, utilizing components such as X-ray sources, spherical curved crystals, detectors, and high-precision displacement stages. They can measure the local structural information of neighboring elements (such as the type, valence state, bond length, and coordination number of coordinating elements).

[0003] like Figures 7-8 As shown, the sample holder assembly of a conventional laboratory spectrometer includes a base 1, a sample 2 to be tested, a sample holder body 3, and a cover plate 4. The sample 2 to be tested is a disc, placed in a circular groove in the center of one side of the sample holder body 3. A circular groove on one side of the cover plate 4 engages with a disc-shaped protrusion on the sample holder body 3 to cover the surface of the sample 2. The other side of the sample holder body 3 rests in a circular groove in the base 1. Circular through-holes are formed in the middle areas of the base 1, sample holder body 3, and cover plate 4 to allow X-rays to pass through the sample 2 and reach the detector (not shown). The sample holder body 3 is typically made of N35 neodymium magnet (high-temperature annealed), while the base 1 and cover plate 4 can be made of 45# steel or other iron materials. The base 1 and cover plate 4 are attracted to each other by the magnetic force of the sample holder body 3 and are mounted onto a support plate (not shown) in the spectrometer system via the base 1, thus completing the installation of the sample 2 in the entire spectrometer system.

[0004] In this existing structure, the sample holder body 3 is machined from a single piece of strong magnet. It needs to be annealed at high temperature to reduce its magnetic strength from a strong magnetic state to a suitable level, allowing for quick assembly and disassembly of this part from the base 1 and cover plate 4. (Unannealed strong magnets, due to their high magnetism, cannot be directly used as sample holders; while weakly magnetic materials, due to their brittleness and poor machinability, cannot be processed into the required structure). The setting of key process parameters such as annealing temperature and time is crucial. When a large number of strong magnets are annealed simultaneously, magnets in different locations within the furnace may not acquire suitable magnetism after annealing due to uneven heating, failing to meet the requirements for quick assembly and disassembly of the sample holder. Summary of the Invention

[0005] To address the problems of the aforementioned prior art, which involves a relatively complex process for demagnetizing strong magnets through high-temperature annealing and demagnetization failure due to uneven heating, this invention provides a sample holder assembly.

[0006] According to the present invention, the sample holder assembly includes a base, a sample to be tested, a sample holder base, micro magnets and a cover plate, wherein the sample to be tested is a disc placed on the sample holder base, the sample holder base is a metal part, and different numbers of micro magnets are embedded on its front and back sides to obtain appropriate magnetic force, and the base and the cover plate are respectively fixed on the sample holder base by the magnetic force provided by the micro magnets.

[0007] Preferably, the sample holder base is a stepped disc shape, which includes a body and a boss protruding from the body, and the cover plate has a circular shallow groove structure, in which the boss is accommodated and fitted.

[0008] Preferably, the base has a circular shallow groove structure with a bottom surface and a side surface. The body sits in the circular shallow groove structure to fit together, so that the back surface and the outer cylindrical surface of the body contact the bottom surface and the side surface, respectively.

[0009] Preferably, the sample holder base has a circular through hole at its center, which consists of a larger circular hole and a smaller circular hole. The larger circular hole transitions to the smaller circular hole through a central plane, on which the sample to be tested is mounted.

[0010] Preferably, a hollow cylinder protrudes from the center of the cover plate, and the hollow cylinder is accommodated in a larger circular hole.

[0011] Preferably, both sides of the sample holder base have several circular holes evenly spaced around their geometric center, and micro magnets are tightly embedded in the circular holes.

[0012] Preferably, eight circular holes are symmetrically distributed on each side of the sample holder base at 45° intervals.

[0013] Preferably, the outer diameter of the micro magnet is 3 mm, the thickness is 0.9 mm, the inner diameter of the circular hole is 3 mm, and the depth is 1.2 mm.

[0014] Preferably, the circular hole is interference-fitted with the micro magnet.

[0015] Preferably, four micro magnets are symmetrically pressed into the circular holes on the side of the sample holder where the sample is placed, spaced 90° apart, while six micro magnets are symmetrically pressed into the circular holes on the other side of the sample holder.

[0016] According to the sample holder assembly of the present invention, different numbers of micro magnets are embedded on both sides of the sample holder base to obtain appropriate magnetic force, which is used for rapid positioning, installation and replacement of samples on laboratory spectrometers, so as to obtain appropriate magnetic force for the sample holder body in a simpler way and improve the yield rate during mass production. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of a sample holder assembly according to a preferred embodiment of the present invention.

[0018] Figure 2 yes Figure 1 A schematic diagram of the first structure of the sample support substrate.

[0019] Figure 3 yes Figure 1 A schematic diagram of the second structure of the sample support substrate.

[0020] Figure 4 yes Figure 1 A schematic diagram of the cover plate.

[0021] Figure 5 yes Figure 1 A schematic diagram of the first structure of the base.

[0022] Figure 6 yes Figure 1 The second structural diagram of the base.

[0023] Figure 7 This is a schematic diagram of the overall structure of the existing sample holder assembly.

[0024] Figure 8 yes Figure 7 A sectional view. Detailed Implementation

[0025] To enable those skilled in the art to better understand the present invention, the invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of the invention.

[0026] like Figure 1 As shown, a sample holder assembly according to a preferred embodiment of the present invention includes a base 1, a sample to be tested 2, a sample holder base 5, micro magnets 6, and a cover plate 7. The sample to be tested 2 is a disc placed on the sample holder base 5. The sample holder base 5 is a metal part, and different numbers of micro magnets 6 are embedded on its front and back sides to obtain appropriate magnetic force. The base 1 and the cover plate 7 are respectively fixed on the sample holder base 5 by the magnetic force provided by the micro magnets 6.

[0027] Compared to the existing technology where the sample holder body 3 obtains appropriate magnetic force by machining and heat treating a whole strong magnet (usually an N35 neodymium magnet), the sample holder assembly of the present invention obtains appropriate magnetic force by embedding different numbers of micro magnets 6 on both sides of the sample holder base 5. It does not require high-temperature annealing of a whole strong magnet, but only requires machining a conventional metal blank and embedding micro magnets to obtain appropriate magnetic force. This solves the technical risk of demagnetizing strong magnets by high-temperature annealing in the existing technology, and at the same time more conveniently realizes the experimental requirements of accurate and rapid positioning, installation and replacement of the sample to be tested.

[0028] like Figure 2 and Figure 3 As shown, the sample holder base 5 is a stepped disc shape, comprising a body and a protrusion 11 protruding from the body. The center of the sample holder base 5 has a circular through-hole 10, which allows X-rays transmitted through the sample 2 to reach a detector (not shown). This circular through-hole 11 consists of a larger circular hole and a smaller circular hole. The larger circular hole is provided by the protrusion 11 and part of the body, while the smaller circular hole is provided by the remaining part of the body. The larger circular hole transitions to the smaller circular hole via a central plane 12 on which the sample 2 is mounted. Specifically, eight circular holes 8 are symmetrically distributed at 45° intervals on both sides of the sample holder base 5, with their geometric centers as the center. In this embodiment, the depth of the circular holes 8 is less than the depth of the larger circular holes and approximately equal to the depth of the smaller circular holes. In this embodiment, the outer diameter φ of the micromagnet 6 is 3 mm, and its thickness is 0.9 mm. The inner diameter φ of the circular holes 8 is 3 mm, and its depth is 1.2 mm. The fit between the circular hole 8 and the micro magnet 6 is an interference fit of φ3H7 / h7 to ensure that each micro magnet 6 can be tightly embedded in the corresponding circular hole 8. By pressing different numbers of micro magnets 6 tightly into both sides of the sample support base 5, a suitable magnetic force can be obtained between the cover plate 7 and the sample support base 5, as well as between the sample support base 5 and the base 1, thereby completing the rapid positioning, installation, and removal of the sample 2 to be tested.

[0029] like Figure 4 As shown, the main body of the cover plate 7 is disc-shaped, with a shallow circular groove structure 15 at its bottom and a hollow cylinder 16 protruding from the center. A circular through-hole 17 in the center allows X-rays to be transmitted to the sample 2 to be tested. Combined with... Figure 1 The protrusion 11 of the sample base 5 is accommodated in the circular shallow groove structure 15 of the cover plate 7, and the hollow cylinder 16 of the cover plate 7 is accommodated in the larger circular hole of the sample base 5, so that they cooperate to cover the sample 2 to be tested on the sample base 5 through the cover plate 7.

[0030] like Figure 5 As shown, the base 1 has a symmetrical structure with a rectangular through-hole at its center. In this embodiment, the dimensions of the two sides 18 and 19 of the rectangular through-hole are 9 mm and 3 mm, respectively. It should be understood that these dimensions can be changed according to the size of the transmitted light spot on the sample 2 to be tested. A circular shallow groove structure is provided around the rectangular through-hole, such as... Figure 6 As shown, the circular shallow groove structure has a bottom surface 23 and a side surface 24. Combined with... Figure 1 The sample holder base 5 is seated in the circular shallow groove structure, so that the back side 14 of the body (see Figure 3 ) and outer cylindrical surface 13 (see Figure 3 It contacts the bottom surface 23 and the side surface 24 respectively. Return Figure 5Three circular through holes 22 are used to insert screws to fix the base 1 to the bracket (not shown here) for installation into the spectrometer system. The two symmetrical surfaces 20 and 21 form a certain included angle. In this embodiment, the included angle is 42.6°. It should be understood that this included angle is not a fixed value and can be adjusted according to the actual installation situation.

[0031] In this embodiment, the base 1, sample holder base 5, and cover plate 7 are all made of 45# steel, and the micro magnets 6 are made of N35 neodymium magnets. In use, the base 1 is first fixed to the bracket (not shown here), and the sample 2 to be tested is placed on the plane 12 in the sample holder base 5. In this invention, four micro magnets 6 are symmetrically pressed into the circular holes 8 on the side of the sample holder base 5 where the sample 2 is placed, spaced 90° apart. Six micro magnets 6 are symmetrically pressed into the circular holes 8 on the other side of the sample holder base 5. The different numbers of micro magnets 6 pressed into the sample holder base 5 on both sides are to ensure that the cover plate 7 and the sample holder base 5, as well as the sample holder base 5 and the base 1, in the sample holder assembly can obtain suitable magnetic force. The circular shallow groove surface 15 and the central cylindrical surface 16 on the cover plate 7 are brought into contact with the surface of the protrusion 11 and the circular hole 9 on the sample holder base 5, respectively. Under the magnetic attraction of the four micro magnets 6, the cover plate 7 and the sample holder base 5 are positioned and installed. The sample 2, sample base 5, and cover plate 7 are assembled and positioned so that the back surface 14 and outer cylindrical surface 13 of the sample base 5 contact the bottom surface 23 and side surface 24 of the circular shallow groove on the base 1, respectively. Under the magnetic attraction of six micro magnets 6, the sample base 5 and base 1 are positioned and installed, and the process is also completed. Figure 3 The assembly of the entire sample holder assembly.

[0032] The sample holder assembly provided by this invention has been described in detail above. The composition of each part of the device and their installation positions have been explained in this document. The above description is only for the purpose of helping to understand the method and core idea of ​​this invention. It should be noted that those skilled in the art can make several improvements and modifications to this invention without departing from the principles of this invention, and these improvements and modifications also fall within the protection scope of the claims of this invention.

Claims

1. A sample holder assembly, characterized in that, The sample holder assembly includes a base, a sample to be tested, a sample holder base, micro magnets, and a cover plate. The base is fixed to the support plate of the spectrometer system. The sample to be tested is a disc placed on the sample holder base. The sample holder base is a metal part with different numbers of micro magnets embedded on its front and back sides to obtain appropriate magnetic force. The base and the cover plate are fixed to the sample holder base by the magnetic force provided by the micro magnets.

2. The sample holder assembly according to claim 1, characterized in that, The sample holder base is a stepped disc shape, which includes a body and a boss protruding from the body. The cover plate has a circular shallow groove structure, and the boss is accommodated in the circular shallow groove structure.

3. The sample holder assembly according to claim 2, characterized in that, The base has a circular shallow groove structure with a bottom surface and a side surface. The main body sits in the circular shallow groove structure to fit together, so that the back surface and the outer cylindrical surface of the main body contact the bottom surface and the side surface, respectively.

4. The sample holder assembly according to claim 1, characterized in that, The sample holder base has a circular through hole at its center, which consists of a larger circular hole and a smaller circular hole. The larger circular hole transitions to the smaller circular hole through a central plane, on which the sample to be tested is mounted.

5. The sample holder assembly according to claim 4, characterized in that, A hollow cylinder protrudes from the center of the cover plate, and the hollow cylinder fits into a larger circular hole.

6. The sample holder assembly according to claim 1, characterized in that, Both sides of the sample support base have several circular holes evenly spaced around their geometric center, and micro magnets are tightly embedded in the circular holes.

7. The sample holder assembly according to claim 6, characterized in that, Eight circular holes are symmetrically distributed on each side of the sample holder base at 45° intervals.

8. The sample holder assembly according to claim 6, characterized in that, The miniature magnet has an outer diameter of 3mm and a thickness of 0.9mm, and the inner diameter of the circular hole is 3mm and the depth is 1.2mm.

9. The sample holder assembly according to claim 6, characterized in that, The round hole is interference-fitted with the miniature magnet.

10. The sample holder assembly according to claim 6, characterized in that, Four micro magnets are symmetrically pressed into the circular holes on the side of the sample holder where the sample is placed, spaced 90° apart. Six micro magnets are symmetrically pressed into the circular holes on the other side of the sample holder.

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