A sample holder suitable for multiple size epoxy targets

Abstract

The application relates to a sample clamp suitable for epoxy resin targets of multiple sizes, comprising a base and a clamping structure; the clamping structure is arranged on the base; the clamping structure has a clamping space and a placement table arranged inside the clamping space, and the axis of the placement table coincides with the axis of the clamping space; wherein the clamping space has multiple clamping sizes to be suitable for sample targets of different sizes; the top opening of the clamping space is arranged so that the sample target to be installed can be placed on the placement table in a forward direction from the top opening of the clamping space, and the top surface of the clamped and fixed sample target is higher than the top opening of the clamping space. The application realizes clamping and fixing of epoxy resin targets of different sizes.

Description

Technical Field

[0001] This application belongs to the field of epoxy resin target analysis and testing technology, and specifically relates to a sample holder applicable to epoxy resin targets of various sizes. Background Technology

[0002] In geological science experiments and automated mineralogical analysis, existing sample stages for epoxy resin targets have the following shortcomings in terms of installation, operation, and size compatibility:

[0003] The existing sample stage has a fixed-size cylindrical cavity for mounting samples, which cannot accommodate cylindrical epoxy resin sample targets of different sizes. When the sample size exceeds or falls below the cavity specifications, it cannot be placed properly, greatly limiting its application range. Furthermore, when installing the epoxy resin sample target, the top cover must be removed, and the target placed face down on the table with the top surface (test surface) facing down inside the cavity. This not only easily leads to confusion but also easily scratches the top test surface of the epoxy resin sample target, adversely affecting subsequent analysis and testing. Utility Model Content

[0004] In view of the above analysis, the present invention aims to provide a sample holder applicable to epoxy resin targets of multiple sizes, so as to solve at least one of the above-mentioned problems existing in the prior art.

[0005] The purpose of this utility model is achieved as follows:

[0006] A sample holder suitable for multi-size epoxy resin targets, comprising:

[0007] Base;

[0008] A clamping structure is provided on the base; the clamping structure has a clamping space and a shelf provided inside the clamping space, the axis of the shelf coincides with the axis of the clamping space;

[0009] The clamping space has multiple continuously adjustable clamping dimensions to accommodate sample targets of different sizes. The top opening of the clamping space allows the sample target to be installed to be placed on the stage facing forward from the top opening of the clamping space. Furthermore, the top surface of the clamped and fixed sample target is higher than the top opening of the clamping space.

[0010] Furthermore, there are multiple clamping structures, which are arranged in an N×M row and column pattern on the base;

[0011] Where N and M are the number of rows and columns of the clamping structure, respectively, and both N and M are integers greater than 1.

[0012] Furthermore, the size of each of the multiple clamping spaces can be adjusted independently.

[0013] Furthermore, the clamping structure has multiple clamping contact positions with the cylindrical side surface of the sample target. These multiple clamping contact positions are arranged symmetrically with respect to the axis of the sample target and are located on the same cylindrical surface.

[0014] Furthermore, the clamping structure also has a drive mechanism and a clamping assembly, which are disposed on the base. The clamping assembly forms a clamping space, and the drive mechanism is connected to the clamping assembly and configured to adjust the size of the clamping space.

[0015] Furthermore, the clamping assembly has four vertically parallel clamping rods located on the same circumference and forming a clamping space above the base; the base is provided with a cross groove with four directional slots, and the lower ends of the four clamping rods are slidably disposed in the four slots respectively.

[0016] Furthermore, the drive mechanism is located at the bottom of the base and is driven by four clamping rods to drive the four clamping rods to synchronously move closer to or away from the axis of the clamping space in their respective slots.

[0017] Furthermore, the stage is set on the base and located in the middle of the cross groove to support the sample target.

[0018] Furthermore, the clamping structure also has a knob, which is set on the base and coupled to the drive mechanism. The knob and the drive mechanism control the four clamping rods to move closer to or further away from the center of the cross groove to clamp or release the sample target on the stage.

[0019] Furthermore, the top of the clamping rod is located at the center of the sample target's side circumference.

[0020] Compared with the prior art, the sample holder for epoxy resin targets of various sizes provided by this utility model can achieve at least one of the following beneficial effects:

[0021] 1. The clamping structure adopts an adjustable clamping space. By adjusting the size of the clamping space, it can clamp and fix sample targets of different sizes, which solves the problem that the installation cavity size of traditional sample stages cannot be adjusted. It can be adapted to sample targets of different sizes.

[0022] 2. The top opening of the clamping space allows the sample target to be placed on the stage facing forward through the top opening of the clamping space. Unlike traditional sample stages, the top cover does not need to be removed during sample loading, and the sample target will not be confused due to the top cover being flipped up. This structure not only makes the sample loading operation more convenient and prevents the sample target from being confused due to the top cover being flipped up, but also minimizes the adverse effects such as wear or scratches on the top surface of the sample target during the sample loading process. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this specification or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the embodiments of this specification. For those skilled in the art, other drawings can be obtained based on these drawings.

[0024] Figure 1 A schematic diagram of the overall structure of a sample holder suitable for multi-size epoxy resin targets provided by this utility model;

[0025] Figure 2 for Figure 1 A magnified schematic diagram of a portion of region A in the middle;

[0026] Figure 3 A schematic diagram of the bottom structure of a sample holder base for multi-size epoxy resin targets provided by this utility model;

[0027] Figure 4 for Figure 3 A partial structural diagram of the bottom of the central base;

[0028] Figure 5 for Figure 3 A magnified schematic diagram of a portion of region B in the middle;

[0029] Figure 6 for Figure 3 A magnified schematic diagram of a portion of region D in the middle;

[0030] Figure 7 This is a partial structural diagram of a sample holder for multi-sized epoxy resin targets provided by this utility model.

[0031] Figure label:

[0032] 10. Base; 11. Cross groove; 12. Clamping rod; 13. Stage; 131. Support body; 132. Placement plate; 14. Sample target;

[0033] 20. Drive mechanism; 201. Base; 202. First shaft; 203. Winch; 2031. Wire groove; 2032. Wire hole; 204. Stranded wire; 205. End face gear; 206. Bevel gear; 207. Second shaft; 208. Locking nut; 209. Locking washer; 210. Limiting plate;

[0034] 30. Knob; 30A. Central area control knob;

[0035] 40. Slide rail; 41. Skateboard;

[0036] 50. Column; 51. Elastic band. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. It should be noted that, unless otherwise specified, the implementation methods and features in the implementation methods in this disclosure can be combined, separated, interchanged, and / or rearranged. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0038] In the accompanying drawings, the dimensions and relative dimensions of components may be exaggerated for clarity and / or descriptive purposes. When exemplary embodiments can be implemented differently, a specific process sequence may be performed in a different order than that described. For example, two consecutively described processes may be performed substantially simultaneously or in the reverse order of their description. Furthermore, the same reference numerals denote the same components.

[0039] The terminology used herein is for the purpose of describing particular embodiments and is not intended to be limiting. As used herein, unless the context clearly indicates otherwise, the singular forms “a” and “(the)” are also intended to include the plural forms. Furthermore, when the terms “comprising” and / or “including” and variations thereof are used in this specification, it indicates the presence of the stated features, integrals, steps, operations, parts, components, and / or groups thereof, but does not exclude the presence or addition of one or more other features, integrals, steps, operations, parts, components, and / or groups thereof. It should also be noted that, as used herein, the terms “substantially,” “about,” and other similar terms are used as approximate terms rather than as terms of degree, thus explaining the inherent biases in measurements, calculated values, and / or provided values ​​that would be recognized by one of ordinary skill in the art.

[0040] Example 1

[0041] A specific embodiment of this utility model discloses a sample holder suitable for epoxy resin targets of multiple sizes, used to mount cylindrical epoxy resin targets of different sizes (hereinafter referred to as "sample target 14"). The cylindrical epoxy resin target is suitable for scanning electron microscopes (SEMs). The SEM is equipped with automated mineral analysis software. During automated mineral analysis, the epoxy resin target is clamped and fixed in the clamping space of the clamping structure. Subsequently, other instrument operation steps are performed to realize automated mineral analysis of sample target 14.

[0042] like Figures 1 to 6 As shown, a sample holder suitable for multi-size epoxy resin targets includes:

[0043] Base 10;

[0044] A clamping structure is provided on the base 10; the clamping structure has a clamping space and a stage 13 located inside the clamping space; the axis of the clamping space coincides with the axis of the sample target 14 mounted on the stage 13, and the size of the clamping space is adjustable, with multiple clamping sizes to accommodate sample targets 14 of different sizes; the top opening of the clamping space is provided so that the sample target 14 to be installed can be placed on the stage 13 facing forward from the top opening of the clamping space; the top surface of the clamped and fixed sample target 14 is higher than the top opening of the clamping space to ensure normal analysis and detection of the top surface of the sample target 14 by the instrument.

[0045] Ideally, the sample target 14 is a regular cylindrical structure, meaning that the top and bottom surfaces of the sample target 14 are two parallel planes, with the top surface serving as the test surface. In this embodiment, "positive placement" means that the sample target 14 is installed with the test surface facing upwards, and the bottom surface of the sample target 14 is placed on the stage 13, where it can be bonded and fixed.

[0046] In this embodiment, multiple clamping structures are arranged in an N×M row and column configuration on the base 10, where N is the number of rows of the clamping structures and M is the number of columns of the clamping structures, and both N and M are integers greater than 1. For example, the clamping structures on the base 10 can be arranged in 3×3, 4×4, 3×4, 3×5, 4×5, etc., to meet the usage requirements of multiple sample targets, such as 9, 12, 16, 15, 20, etc.

[0047] In this embodiment, the clamping structure and the cylindrical side surface of the sample target 14 have multiple clamping contact positions. The multiple clamping contact positions are arranged symmetrically with respect to the axis of the sample target 14, and the multiple clamping contact positions are located on the same cylindrical surface. It should be noted that in this embodiment, the clamping contact positions between the clamping space and the sample target 14 can be point contact, line contact, or surface contact.

[0048] In one alternative embodiment, the clamping structure further includes a drive mechanism 20 and a clamping assembly, which are disposed on the base 10. The clamping assembly forms a clamping space, and the drive mechanism 20 is connected to the clamping assembly and configured to adjust the size of the clamping space.

[0049] For example, the clamping assembly has four vertically parallel clamping rods 12 located on the same circumference; a cross groove 11 is formed on the base 10, each cross groove 11 having four segments connected in the four directions (up, down, left, and right) at its center point; the four clamping rods 12 are respectively disposed in the four segments of the cross groove 11 and slidably connected to the segments; the clamping rods 12 also extend to the bottom of the base 10, and the four clamping rods 12 form a clamping space above the base 10. In this configuration, the four clamping contact positions formed by the four clamping rods 12 and the side circumferential surface of the sample target 14 are line contacts; the driving mechanism 20 is disposed at the bottom of the base 10 and is drivenly connected to the clamping rods 12, used to drive the clamping rods 12 to move synchronously towards or away from the axis of the clamping space in their respective segments. This structural configuration allows the clamping space to have multiple continuously adjustable clamping dimensions.

[0050] In this embodiment, the stage 13 is disposed on the base 10 and is located in the middle of the cross groove 11 to support the sample target 14. The axis of the stage 13 coincides with the axis of the clamping space.

[0051] For example, the stage 13 includes a support body 131 and a plate 132. The support body 131 can be a cylinder, and the plate 132 is a circular plate. The diameter of the plate 132 is larger than the diameter of the support body and smaller than the diameter of the sample target 14. The plate 132 is located at the top of the support body 131, and the center point of the plate 132 is located on the axis of the support body 131. The bottom end of the support body 131 is connected to the base 10 and is located in the middle of the cross groove 11.

[0052] In this embodiment, the drive mechanism 20 can be driven by a motor or manually, so as to adjust the size of the clamping space.

[0053] In one alternative embodiment, the drive mechanism 20 is manually operated. Specifically, the clamping structure also includes a knob 30, which is mounted on the base 10 and coupled to the drive mechanism 20. The knob 30 controls the four clamping rods 12 to move closer to or further away from the center of the cross groove 11 to clamp or release the sample target 14 on the stage 13. Optionally, the knob 30 can be connected to the drive structure 20 via a connecting shaft and gears. During sample loading, rotating the knob controls the drive mechanism 20 to move the clamping rods 12 towards the end of their respective slots, increasing the clamping space. The sample target 14 is then placed face-up on the stage 13 from the top opening of the clamping space. Rotating the knob again in the opposite direction controls the drive mechanism 20 to move the clamping rods 12 towards the middle intersection of the cross grooves 11 within the slots, reducing the clamping space until all four clamping rods 12 simultaneously abut against the side surface of the sample target 14, thus fixing the sample target 14. In this embodiment, to ensure normal detection of the top surface of the sample target 14 by the instrument, the top of the clamping rod 12 is lower than the top surface of the sample target 14. Optionally, after the sample target 14 is placed on the stage 13 and clamped and fixed by the clamping space, the top of the clamping rod 12 is located at the middle of the side surface of the sample target 14.

[0054] It should be noted that the knob 30 can be located on the side of the base 10, such as... Figure 1 , Figure 3 As shown; the knob 30 can also be located on the top surface of the base 10 and in the area next to the cross groove 11 (not shown in the figure); of course, some knobs can also be located on the side of the base 10 and some knobs 30 can be located on the top surface of the base 10; different knobs 30 (and their connected parts) do not interfere with each other, ensuring independent drive control of each clamping structure, so that a sample stage can simultaneously perform detection of sample targets of different sizes. For example, Figure 1 Nine clamping structures are provided on the base 10, eight of which are located at the four edges of the base 10. The knobs 30 corresponding to these eight clamping structures are located on the side of the base 10. The knob corresponding to the clamping structure located in the middle is called the middle area knob 30A. The middle area control knob 30A can also be arranged on the side of the base 10 without interfering with the adjacent knobs 30 and their connecting parts.

[0055] In this embodiment, the base 10 serves as an integral support structure. A cross-shaped groove 11 is formed on the base 10, comprising four vertically intersecting grooves in both the longitudinal and transverse directions. The cross-shaped groove 11 provides a sliding path for the four clamping rods 12. A clamping rod 12 is installed on each of the upper longitudinal groove, the lower longitudinal groove, the left transverse groove, and the right transverse groove. The clamping rods 12 pass through the cross-shaped groove 11 and extend to the bottom of the base 10, connecting to the drive mechanism 20. The four clamping rods 12 enclose an adjustable clamping space above the base 10. A platform 13 is located at the center of the cross-shaped groove 11 to support the sample target 14. When the knob 30 is rotated, the knob 30, through the coupled drive mechanism 20, drives the four clamping rods 12 to move synchronously along their respective grooves: when moving towards the ends of the groove, the clamping space expands; when moving towards the center of the cross intersection, the clamping space shrinks, until the sides of the clamping rods 12 contact and clamp the side surface of the sample target 14, thus fixing the sample target 14.

[0056] This embodiment uses a clamping structure with knob 30, which eliminates the need to remove the top cover. The sample target 14 is placed directly on the stage 13, and the clamping / release of the sample target 14 is completed by turning knob 30 with one hand. The operation steps are reduced from 5 steps of traditional sample stage loading to 3 steps, and the position of the sample target 14 is swapped due to the top cover being reversed, which reduces the risk of confusion when detecting multiple sample targets 14.

[0057] Furthermore, a rubber layer is provided at the contact position between the clamping space and the side peripheral surface of the sample target 14. The rubber layer is disposed on the clamping assembly. This structural arrangement allows the side peripheral surface of the sample target 14 to be flexibly clamped with the clamping assembly, providing a certain degree of deformation capability under the clamping action of the clamping rod, and increasing the friction between the clamping assembly and the side peripheral surface of the sample target 14. For example, a rubber layer is provided on the clamping rod 12, and the rubber layer can be sleeved on the clamping rod 12.

[0058] In some alternative embodiments, the drive mechanism 20 includes a base 201, a first shaft 202, a winch 203, a stranded wire 204, an end-face gear 205, a bevel gear 206, a second shaft 207, and a locking assembly. The base 201 is connected to the base 10 and is located in the middle of the cross groove 11. The first shaft 202 is connected to the base 201. Two winches 203 are included, and the two winches 203 and the end-face gear 205 are rotatably connected to the outer end of the first shaft 202. The two winches 203 are fixedly connected to the end-face gear 205, with the end-face gear 205 located on the outermost side. The second shaft 207 passes through... The base 10 is rotatable, with one end connected to the knob 30 and the other end connected to the bevel gear 206. The bevel gear 206 meshes with the end face gear 205. A locking assembly is provided on the second shaft 207 for locking and unlocking the rotation of the second shaft 207. Two stranded wires 204 are included. One stranded wire 204 is connected to two opposing clamping rods 12 arranged longitudinally in the cross groove 11 and passes through the side wall of the inner winch 203. The other stranded wire 204 is connected to two opposing clamping rods 12 arranged laterally in the cross groove 11 and passes through the side wall of the winch 203 located in the middle.

[0059] When the knob 30 is rotated, the second shaft 207 drives the bevel gear 206 to rotate. The bevel gear 206 drives the end face gear 205 and the two winches 203 to rotate synchronously. The rotation of the winches 203 will wind up the stranded wire 204. When winding up the wire, the four clamping rods 12 move synchronously toward the central axis of the clamping space until they abut against the side circumferential surface of the sample target 14. The second shaft 207 is locked by the locking assembly, and the clamping rods 12 remain fixed to the sample target 14. When releasing the wire, the knob 30 is turned in the opposite direction, and the four clamping rods 12 are pulled toward their respective slot ends. The winches 203 rotate in the opposite direction, and the four clamping rods 12 reset synchronously. The stranded wire 204 resets and returns to a straight state.

[0060] The meshing of the bevel gear 206 and the end face gear 205, along with the symmetrical winding and unwinding of the stranded wire 204, ensures that the four clamping rods 12 move synchronously in the longitudinal and transverse directions, and that the clamping force is evenly distributed, thus preventing the sample target 14 from tilting or deforming due to unilateral force.

[0061] In this embodiment, the stranded wire 204 is made of high-strength nylon material (tensile strength ≥50MPa), and with the directional winding and unwinding of the winch 203, it can provide a stable clamping force to meet the fixation requirements of the sample target 14.

[0062] The drive mechanism 20 is integrated into the bottom of the base 10, without occupying the space above the sample target 14, and is suitable for the narrow chamber environment of equipment such as scanning electron microscopes.

[0063] The winch 203 has a wire groove 2031 on its side wall and a wire hole 2032 on its side wall. The wire hole 2032 is located in the middle of the wire groove 2031 and forms two opposite openings in the wire groove 2031. The stranded wire 204 passes through the wire hole 2032 and is connected to the bottom end of the clamping rod 12.

[0064] The winch 203 has an annular groove 2031 on its side wall, with a wire hole 2032 through the center of the groove 2031. The diameter of the wire hole 2032 is slightly larger than the diameter of the stranded wire 204. The groove 2031 is annular, which guides the stranded wire 204 to wind or unwind orderly along the groove 2031 when the winch 203 rotates, preventing tangling. The wire hole 2032 is located in the center of the groove 2031 and passes through the winch 203. After the stranded wire 204 passes through the wire hole 2032, its two ends are connected to two opposing clamping rods 12. When the winch 203 rotates clockwise, the stranded wire 204 is wound in the groove 2031, pulling the two clamping rods 12 towards the center; when it rotates counterclockwise, the stranded wire 204 is released, and the clamping rods 12 move towards both ends under the action of a restoring force. The position of the wire hole 2032 ensures that the stranded wire 204 is always in the center of the wire groove 2031, avoiding uneven force caused by bias to one side.

[0065] In some optional embodiments, the clamping structure is further provided with an automatic reset mechanism located at the bottom of the base 10, for automatically resetting the clamping rods 12, enabling the clamping rods 12 to move towards the end of the groove segment. Specifically, the automatic reset mechanism includes four columns 50 and an elastic band 51. The four columns 50 are arranged in a rectangle, with each column 50 located at one of the four corners of the rectangle. The rectangle formed by the four columns 50 is centered on the base 201, and each column 50 is located at the midpoint of two adjacent clamping rods 12. Furthermore, in the reset state, the four clamping rods 12 are exactly located on the four sides of the rectangle formed by the four columns 50, and each clamping rod 12 is located at the midpoint of its respective side. The elastic band 51 is first threaded through the side walls of the four uprights 50, and located on the outside of the four uprights 50. At this time, the elastic band 51 also forms a rectangular structure, with each side of the elastic band 51 corresponding to one upright 50, and the clamping rod 12 on the corresponding side is also located at the midpoint of the corresponding side of the elastic band 51. One side of the elastic band 51 passes through the outside of the side wall of the clamping rod 12, and the elastic band 51 is located on the inside of the clamping rod 12. After the elastic band 51 is threaded through the clamping rod 12 and the uprights 50, it remains taut.

[0066] When the clamping rod 12 moves toward the center of the cross groove 11, that is, toward the base 201, the clamping rod 12 pulls the elastic band 51, giving the elastic band 51 an outward pulling force. Therefore, when the clamping rod 12 is in the non-reset position of its respective groove segment, the outward pulling force of the elastic band 51 will pull the clamping rod 12 toward the groove end, causing the clamping rod 12 to automatically reset.

[0067] In some alternative embodiments, the locking assembly includes a locking nut 208, a locking washer 209, and a limiting plate 210. The limiting plate 210 is connected to the bottom surface of the base 10 near the inner wall of the base 10, and the second shaft 207 passes through the limiting plate 210. The locking washer 209 is disposed between the limiting plate 210 and the inner wall of the base 10, and is in close contact with the limiting plate 210 and the base 10. The locking washer 209 is sleeved on the second shaft 207. The locking nut 208 is disposed between the knob 30 and the outer wall of the base 10. The second shaft 207 has threads between the knob 30 and the locking washer 209, and the locking nut 208 is threadedly connected to the second shaft 207.

[0068] The locking assembly consists of a locking nut 208, a locking washer 209, and a limiting plate 210. The limiting plate 210 is fixed to the bottom surface of the base 10 near the inner wall. The second shaft 207 passes through the limiting plate 210 and is rotatable. The locking washer 209, made of metal or nylon, is fitted onto the second shaft 207 and clamped between the limiting plate 210 and the inner wall of the base 10. The locking nut 208 is threaded to one side of the knob 30 on the second shaft 207 (located between the knob 30 and the outer wall of the base 10). After the sample target 14 is clamped and fixed, the locking nut 208 is tightened clockwise. The nut presses against the outer wall of the base 10, locking the second shaft 207 through friction and preventing its rotation. When adjustment is needed, the locking nut 208 is loosened counterclockwise, and the second shaft 207 regains its rotational freedom.

[0069] Once locked, the second shaft 207 effectively resists vibrations and accidental touches during the operation of the scanning electron microscope, ensuring the sample target 14 remains stable and secure during the detection process. No additional tools are required; locking / unlocking can be completed by hand-tightening the locking nut 208, adapting to the laboratory's rapid sample change requirements.

[0070] In some alternative embodiments, the clamping structure further includes slide rails 40, which are respectively disposed on both sides of each slot segment. The side wall of the slide rail 40 is provided with a sliding opening, and the side wall of the clamping rod 12 is provided with two symmetrical sliding plates 41. The sliding plates 41 are slidably connected to the sliding opening of one of the adjacent slide rails 40.

[0071] Each groove segment has parallel slide rails 40 on both sides, and rectangular sliding openings are formed on the opposite sidewalls of the slide rails 40. The clamping rod 12 has two symmetrical sliding plates 41 on its sidewall facing the slide rails 40. The sliding plates 41 are embedded in the sliding openings and can slide along them. When the clamping rod 12 moves, the sliding plates 41 slide within the sliding openings. The slide rails 40 and the sliding openings restrict the vertical and horizontal displacement of the sliding plates 41, allowing the clamping rod 12 to move linearly only along the length of the groove segment.

[0072] The cooperation between the slide rail 40 and the slide plate 41 ensures that the clamping rod 12 moves without wobbling, keeping the center of the sample target 14 always aligned with the center of the stage 13, thus guaranteeing the focusing accuracy of the scanning electron microscope's electron beam. The low-friction characteristics of the PTFE slide plate 41 and the stainless steel slide rail 40 reduce the resistance to movement of the clamping rod 12, and, in conjunction with the drive mechanism 20, enable smooth adjustment, preventing the sample target 14 from shifting due to sudden force. The self-lubricating properties of the slide plate 41 reduce wear over long-term use, extending its service life and reducing maintenance frequency.

[0073] The sample holder for mounting and dismounting sample target 14 using the multi-size epoxy resin target of this embodiment includes the following steps:

[0074] Step S1: Adjust the size of the clamping space of the clamping structure according to the size of the sample target 14, so that the size of the clamping space is larger than the diameter of the sample target 14;

[0075] Step S2: Place the sample target 14 onto the stage 13 from the top opening of the clamping space;

[0076] Step S3: readjust the size of the clamping space of the clamping structure, gradually reduce the size of the clamping space until the size of the clamping space is equal to the outer peripheral surface of the sample target 14. The clamping components of the clamping structure are pressed into contact with the outer peripheral surface of the sample target 14. The clamping components apply a certain clamping force to the side peripheral surface of the sample target 14 to ensure that sufficient fixed clamping force is formed on the sample target 14, and the installation of the sample target 14 is completed.

[0077] Step S4: When the test is completed and the sample target 14 needs to be removed, simply increase the size of the clamping space again, and then remove the sample target 14 directly.

[0078] The specific steps are as follows:

[0079] The knob 30 on the side of the rotating base 10 drives the four clamping rods 12 to move synchronously along the corresponding groove ends of the cross slide groove 11 through the drive mechanism 20, so that the clamping space formed by the four clamping rods 12 above the base 10 increases until the size of the clamping space is larger than the size of the sample target 14 to be installed.

[0080] Place the sample target 14 on the stage 13 in the middle of the cross groove 11 on the base 10, ensuring that the bottom surface of the sample target 14 is in contact with the surface of the stage 13, and that the main body of the sample target 14 is located in the clamping space.

[0081] Rotate the knob 30 in the opposite direction, and drive the four clamping rods 12 to move synchronously along the cross center of the cross groove 11 through the drive mechanism 20, so that the clamping space gradually shrinks; until the inner sidewalls of the four clamping rods 12 contact the sidewalls of the sample target 14 respectively and apply a stable clamping force, the sample target 14 is firmly fixed, and the installation of the sample target 14 is completed.

[0082] Compared with the prior art, the sample holder applicable to epoxy resin targets of various sizes provided in this embodiment, by adjusting the size of the clamping space of the clamping structure and setting the top opening of the clamping space, eliminates the need to disassemble the top cover or other parts during the sample loading process. This eliminates the cumbersome steps of removing the top cover and flipping and placing the sample on the traditional sample stage. The sample target installation process is simplified from multiple steps to three steps: adjusting the space, placing the sample, and fixing the sample. This not only meets the needs of rapid sample change in the laboratory, but also allows for flexible adjustment of the size of the clamping space, which can accommodate sample targets of various sizes. This expands the applicability of the sample stage, reduces the cost of instrument accessories, and successfully solves the technical problem that the fixed size of the installation cavity of the traditional sample stage means that a sample stage can only install a single size sample target.

[0083] The above specific embodiments further illustrate the purpose, technical solution and beneficial effects of this application. It should be understood that the above are only specific embodiments of this application and are not intended to limit the scope of protection of this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A sample holder suitable for epoxy resin targets of various sizes, characterized in that, include: Base; A clamping structure is provided on the base; the clamping structure has a clamping space and a shelf provided inside the clamping space, the axis of the shelf coincides with the axis of the clamping space; The clamping space has multiple clamping sizes to accommodate sample targets of different sizes; the top opening of the clamping space is provided so that the sample target to be installed can be placed on the stage facing forward from the top opening of the clamping space, and the top surface of the clamped and fixed sample target is higher than the top opening of the clamping space.

2. The sample holder suitable for multi-size epoxy targets of claim 1, wherein, The number of clamping structures is multiple, and the multiple clamping structures are arranged in an N×M row and column pattern on the base; Where N and M are the number of rows and columns of the clamping structure, respectively, and both N and M are integers greater than 1.

3. The sample holder suitable for multi-size epoxy targets of claim 2, wherein, The size of each of the multiple clamping spaces can be adjusted independently.

4. The sample holder suitable for multi-size epoxy targets of claim 1, wherein, The clamping structure has multiple clamping contact positions with the cylindrical side surface of the sample target. The multiple clamping contact positions are arranged symmetrically with respect to the axis of the sample target and are located on the same cylindrical surface.

5. The sample holder suitable for multi-size epoxy targets of claim 1, wherein, The clamping structure also includes a driving mechanism and a clamping assembly, which are disposed on the base. The clamping assembly forms a clamping space, and the driving mechanism is connected to the clamping assembly and configured to adjust the size of the clamping space.

6. The sample holder suitable for multi-size epoxy targets of claim 5, wherein, The clamping assembly has four vertically parallel clamping rods located on the same circumference and forming a clamping space above the base; The base is provided with a cross-shaped sliding groove, which has four sections in four directions. The lower ends of the four clamping rods are slidably disposed in the four sections respectively.

7. The sample holder suitable for multi-size epoxy targets of claim 6, wherein, The drive mechanism is located at the bottom of the base and is driven to connect with four clamping rods, which are used to drive the four clamping rods to synchronously move closer to or away from the axis of the clamping space in their respective slots.

8. The sample holder suitable for multi-size epoxy targets of claim 7, wherein, The stage is mounted on the base and located in the middle of the cross groove, and is used to support the sample target.

9. The sample holder suitable for multi-size epoxy targets of claim 8, wherein, The clamping structure also has a knob, which is disposed on the base and coupled to the drive mechanism. The knob and the drive mechanism control the four clamping rods to move closer to or further away from the center of the cross groove to clamp or release the sample target on the stage.

10. The sample holder suitable for multi-size epoxy targets of claim 9, wherein, The top of the clamping rod is located at the middle of the side circumference of the sample target.

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