Variable aperture holder for an infrared spectrometer transmission accessory

Abstract

The utility model discloses a kind of variable-aperture support of infrared spectrometer transmission accessory, including bottom plate, the top of bottom plate is provided with aperture adjusting assembly;The aperture adjusting assembly includes installation box, one end of rotating shaft is fixedly connected with driving gear, the outer wall of rotating shaft is fixedly connected with cover sheet, the inner wall one side of installation box is also rotationally connected with inner ring gear, the outer wall of inner ring gear is fixedly connected with worm wheel, the utility model relates to infrared spectrometer accessory technical field;The variable-aperture support of this infrared spectrometer transmission accessory, servo motor drives worm rotation, worm engages worm wheel and drives inner ring gear rotation, inner ring gear inside engages driving gear, and further drive rotating shaft and cover sheet rotation, the continuous change of aperture is realized by different superposition state of cover sheet, effectively solve the problem that traditional fixed-aperture support cannot be adapted to small or irregular sample, ensure that sample can completely cover aperture, improve the effectiveness of detection atlas.

Description

Technical Field

[0001] This utility model relates to the field of infrared spectrometer accessory technology, specifically a variable aperture bracket for an infrared spectrometer transmission accessory. Background Technology

[0002] An infrared spectrometer is an instrument that uses the absorption characteristics of infrared light by substances to analyze their composition. In the field of jewelry testing, the transmission method is often used to detect the presence of resinous organic substances in jewelry, providing an important basis for the authenticity and quality assessment of jewelry.

[0003] In the transmission detection process of infrared spectrometers, the support of its transmission accessory is one of the key components. The circular holes on the support are used to define the transmission range of infrared light, ensuring that the detection light can accurately act on the sample. However, most infrared spectrometer transmission accessory supports on the market currently have a fixed aperture design. When the jewelry sample to be tested is small (such as small gemstones or small diamonds) or irregularly shaped, and cannot completely cover the fixed circular holes on the support, infrared light will leak from the uncovered areas of the circular holes, causing stray light to be mixed into the detection signal, interfering with the accuracy of the spectrum, or even failing to obtain a valid spectrum, thus affecting the reliability of the detection results.

[0004] To address this issue, the present invention provides a variable aperture support for an infrared spectrometer transmission accessory. Utility Model Content

[0005] To address the shortcomings of existing technologies, this invention provides a variable aperture bracket for an infrared spectrometer transmission accessory, thus solving the aforementioned problems.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a variable aperture bracket for an infrared spectrometer transmission accessory, comprising a base plate, with an aperture adjustment assembly disposed on the top of the base plate; the aperture adjustment assembly comprises a mounting box, a rotating shaft rotatably connected to one side of the inner wall of the mounting box, a drive gear fixedly connected to one end of the rotating shaft, a cover plate fixedly connected to the outer wall of the rotating shaft, an internal gear ring rotatably connected to one side of the inner wall of the mounting box, the drive gear meshing with the inner side of the internal gear ring, and a worm gear fixedly connected to the outer wall of the internal gear ring.

[0007] Furthermore, a protective box is fixedly connected to the top of the mounting box, and a worm gear is rotatably connected between the inner walls of the protective box, the worm gear meshing with a worm wheel.

[0008] The above technical solution is used to transmit power.

[0009] Furthermore, a servo motor is fixedly connected to the top of the mounting box, and the output shaft of the servo motor is fixedly connected to one end of the worm gear.

[0010] The above-mentioned technical solution is used to provide power.

[0011] Furthermore, each masking sheet has a uniform thickness, and the position of each adjacent masking sheet fixed on the rotating shaft in a clockwise or counterclockwise direction will be higher than the thickness of one masking sheet, increasing sequentially.

[0012] By adopting the above technical solution, the masking sheet can be tightly fitted, avoiding any light-transmitting gaps.

[0013] Furthermore, protrusions are fixedly connected to both sides of the mounting box, and a concave frame is fixedly connected to the top of the base plate. The protrusions are slidably connected to the inside of the side wall of the concave frame.

[0014] By adopting the above technical solution, it is easy to disassemble the installation box.

[0015] Furthermore, a pad is fixedly connected to the bottom of the concave frame, and the top of the pad contacts the bottom of the mounting box.

[0016] By adopting the above technical solution, the mounting box is supported and buffered, reducing the impact of vibration during the testing process.

[0017] Beneficial effects

[0018] This invention provides a variable aperture support for a transmission accessory of an infrared spectrometer. Compared with the prior art, it has the following advantages:

[0019] 1. The variable aperture support of this infrared spectrometer transmission accessory can flexibly adjust the aperture size of the support according to the size of the jewelry sample: the servo motor drives the worm gear to rotate, the worm gear meshes with the worm wheel to drive the internal gear ring to rotate, the inner side of the internal gear ring meshes with the drive gear, and then drives the rotating shaft and the cover plate to rotate. The aperture can be continuously changed by different stacking states of the cover plate, which effectively solves the problem that the traditional fixed aperture support cannot adapt to small or irregular samples, ensuring that the sample can completely cover the aperture and improve the effectiveness of the detection spectrum.

[0020] 2. The variable aperture bracket of this infrared spectrometer's transmission accessory features a uniformly thick, progressively increasing thickness of the cover plates. During rotation and adjustment, the cover plates overlap tightly, preventing gaps that could allow stray light to enter and ensuring the accuracy of the infrared light transmission range, thus further improving the reliability of the detection results. Utilizing a servo motor as the drive source, coupled with a worm gear and worm wheel transmission structure, the adjustment process is not only smooth and precise but also features a self-locking function (the reverse self-locking characteristic of worm gear and worm wheel transmission). This ensures that the current aperture size is stably maintained after adjustment, preventing aperture changes due to external interference. The mounting box is slidably connected to a concave frame on the base plate via protrusions, facilitating the installation, disassembly, and maintenance of the aperture adjustment component. Simultaneously, the pads within the concave frame provide support for the mounting box, ensuring the stability of the entire bracket structure. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0022] Figure 1 This is a perspective view of the external structure of this utility model;

[0023] Figure 2 This is a front view of the structure of this utility model;

[0024] Figure 3 This is a top view of the structure of this utility model;

[0025] Figure 4 This is a partial structural side view of the present invention;

[0026] Figure 5 This is a partial structural plan view of this utility model;

[0027] Figure 6 This is a cross-sectional view of the present invention.

[0028] In the diagram: 1. Base plate; 2. Aperture adjustment assembly; 21. Concave frame; 22. Mounting box; 23. Protective box; 24. Drive gear; 25. Cover plate; 26. Internal gear ring; 27. Worm gear; 28. Worm; 29. ​​Servo motor; 210. Pad; 211. Protrusion; 212. Rotating shaft. Detailed Implementation

[0029] It should be noted that in the description of the embodiments of this application, the terms "front," "rear," "left," "right," "up," "down," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. The terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0030] The present application will be further described in detail below with reference to the accompanying drawings and embodiments.

[0031] Reference Figures 1 to 6 This application provides a variable aperture bracket for an infrared spectrometer transmission accessory, including a base plate 1. The base plate 1 is used to fix the entire bracket structure and can be installed on the transmission detection station of the infrared spectrometer via bolts or other connecting parts. An aperture adjustment component 2 is provided on the top of the base plate 1, which is used to flexibly adjust the aperture.

[0032] The aperture adjustment assembly 2 includes a mounting box 22, which provides installation space for internal components. A rotating shaft 212 is rotatably connected to one side of the mounting box 22, allowing it to rotate around its own axis. A ring of shielding plates 25 are arranged around the shaft. A drive gear 24 is fixedly connected to one end of the rotating shaft 212, and shielding plates 25 are fixedly connected to the outer wall of the shaft 212. The shielding plates 25 are made of opaque metal or polymer material and are used to block infrared light and adjust the aperture. An internal gear ring 26 is also rotatably connected to one side of the inner wall of the mounting box 22, allowing it to rotate around the central axis of the mounting box 22. The drive gear 24 meshes with the inner side of the internal gear ring 26, and when the internal gear ring 26 rotates, it simultaneously drives all the drive gears 24 to rotate synchronously. A worm gear 27 is fixedly connected to the outer wall of the internal gear ring 26, and the worm gear 27 rotates coaxially with the internal gear ring 26.

[0033] A protective box 23 is fixedly connected to the top of the mounting box 22. The protective box 23 is used to protect the internal worm gear 28 and worm wheel 27, preventing dust and other debris from affecting the transmission. The worm gear 28 is rotatably connected between the inner walls of the protective box 23. The worm gear 28 meshes with the worm wheel 27. When the worm gear 28 rotates, it can drive the worm wheel 27 to rotate.

[0034] A servo motor 29 is fixedly connected to the top of the mounting box 22. The servo motor 29 is a model with a reduction mechanism to ensure that the output speed is stable and controllable. Its output shaft is fixedly connected to one end of the worm gear 28 to provide power for the rotation of the worm gear 28.

[0035] Each masking sheet 25 has a uniform thickness of 0.5mm-2mm. The position of each adjacent masking sheet 25 fixed on the rotating shaft 212 increases sequentially by the thickness of one masking sheet 25 in a clockwise or counterclockwise direction. This design allows the masking sheets 25 to fit tightly when they are rotated and stacked, avoiding any light-transmitting gaps.

[0036] The mounting box 22 is fixedly connected to both sides with protrusions 211, and the bottom plate 1 is fixedly connected to the top with a concave frame 21. The protrusions 211 are slidably connected to the inside of the side wall of the concave frame 21. By sliding the protrusions 211 inside the concave frame 21, the mounting box 22 can be quickly installed and removed.

[0037] A pad 210 is fixedly connected to the bottom of the concave frame 21. The pad 210 is made of rubber or metal with high hardness. Its top contacts the bottom of the mounting box 22, which provides support and buffer for the mounting box 22 and reduces the impact of vibration during the testing process.

[0038] All electrical devices in this plan are powered by an external power source.

[0039] Working principle: During operation, the variable aperture support of the infrared spectrometer's transmission accessory first adjusts the aperture according to the size of the jewelry sample to be tested by controlling the servo motor 29.

[0040] After the servo motor 29 is started, its output shaft drives the worm 28 to rotate inside the protective box 23. Since the worm 28 meshes with the worm wheel 27, the rotation of the worm 28 drives the worm wheel 27 and the internal gear ring 26 fixedly connected to it to rotate synchronously. The inner side of the internal gear ring 26 meshes with multiple drive gears 24, thereby driving all the rotating shafts 212 to rotate synchronously. The cover plate 25 on the rotating shaft 212 rotates with the rotating shaft 212.

[0041] When the masking plate 25 rotates towards the center, multiple masking plates 25 overlap, increasing the blocked area and decreasing the light-transmitting aperture; when the masking plate 25 rotates outward, the overlapping area decreases and the light-transmitting aperture increases. Because the masking plates 25 are installed with uniform thickness and progressively increasing thickness, they can fit tightly during the stacking process, preventing stray light from entering through gaps.

[0042] When the aperture is adjusted to match the sample size and the sample can completely cover the aperture, the servo motor 29 is turned off. Utilizing the self-locking characteristic of the worm gear transmission, the cover plate 25 maintains its current position, and the aperture size is fixed.

[0043] The jewelry sample is placed at the aperture of the light-transmitting area of ​​the mounting box 22. The infrared light emitted by the infrared spectrometer shines on the sample through the adjusted aperture, and the absorption characteristics of the sample to infrared light are detected, thereby obtaining an effective spectral spectrum and realizing the accurate detection of resin-like organic matter in the sample.

[0044] When maintenance or replacement of the aperture adjustment component 2 is required, the mounting box 22 can be removed from the base plate 1 by sliding the protrusion 211 within the concave frame 21, making the operation convenient. The pad 210 within the concave frame 21 provides stable support for the mounting box 22 throughout the entire operation, ensuring the stability of the testing process.

[0045] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0046] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A variable aperture support for a transmission accessory of an infrared spectrometer, comprising a base plate (1), characterized in that: The top of the base plate (1) is provided with an aperture adjustment assembly (2); the aperture adjustment assembly (2) includes a mounting box (22), a rotating shaft (212) is rotatably connected to one side of the inner wall of the mounting box (22), a drive gear (24) is fixedly connected to one end of the rotating shaft (212), a cover plate (25) is fixedly connected to the outer wall of the rotating shaft (212), an internal gear ring (26) is also rotatably connected to one side of the inner wall of the mounting box (22), the drive gear (24) meshes with the inner side of the internal gear ring (26), and a worm gear (27) is fixedly connected to the outer wall of the internal gear ring (26).

2. The variable aperture support for an infrared spectrometer transmission accessory according to claim 1, characterized in that: The top of the mounting box (22) is fixedly connected to a protective box (23), and a worm gear (28) is rotatably connected between the inner walls of the protective box (23), and the worm gear (28) meshes with a worm wheel (27).

3. The variable aperture support for an infrared spectrometer transmission accessory according to claim 1, characterized in that: A servo motor (29) is fixedly connected to the top of the mounting box (22), and the output shaft of the servo motor (29) is fixedly connected to one end of the worm gear (28).

4. The variable aperture support for an infrared spectrometer transmission accessory according to claim 1, characterized in that: The thickness of each masking piece (25) is uniform. The position of each adjacent masking piece (25) fixed on the rotating shaft (212) in a clockwise or counterclockwise direction will be higher than the thickness of one masking piece (25), and so on.

5. The variable aperture support for an infrared spectrometer transmission accessory according to claim 1, characterized in that: The mounting box (22) is fixedly connected to both sides with protrusions (211), and the bottom plate (1) is fixedly connected to the top with a concave frame (21). The protrusions (211) are slidably connected to the inside of the side wall of the concave frame (21).

6. The variable aperture support for an infrared spectrometer transmission accessory according to claim 5, characterized in that: A pad (210) is fixedly connected to the bottom of the concave frame (21), and the top of the pad (210) contacts the bottom of the mounting box (22).

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