Filter stick fixing device and near-infrared detection device

Abstract

The utility model discloses a filter stick fixing device which is used for fixing filter sticks to be detected on a near-infrared spectrometer, the device is cylindrical, and a cavity is formed in the device and is used for accommodating a plurality of filter sticks; the filter stick fixing device comprises a fixed arc plate, a movable arc plate, a cover plate and a locking assembly; the fixed arc plate is provided with two fixed side edges extending in the axial direction of the fixed arc plate, the movable arc plate is provided with two movable side edges extending in the axial direction of the movable arc plate, and at least one fixed side edge and at least one movable side edge are detachably connected through a locking assembly so that the inner wall of the fixed arc plate and the inner wall of the movable arc plate can define a cavity. The cover plate is fixedly connected with one end of the fixed arc plate, and when the fixed arc plate and the movable arc plate are connected through the locking assembly, the cover plate covers one end of the cavity. According to the utility model, a more stable fixing mode can be provided for a plurality of filter sticks which are just produced, are softer in texture and are easy to deform, and the accuracy of a detection result is improved. The utility model also provides a near-infrared detection device.

Description

TECHNICAL FIELD

[0001] The utility model relates to filter stick detection equipment technical field, especially in kind filter stick fixing device and near infrared detection device. BACKGROUND

[0002] As the plasticizer and curing agent in the forming process of cigarette filter stick, the content of triacetin will directly affect the hardness, resistance and filtering effect of filter stick, and further affect the sensory quality of cigarette smoke. If the content of triacetin is too low, the hardness of filter stick is not enough, which directly affects the quality of filter stick; if the content is too high, too much triacetin will be transferred to the smoke, thereby affecting the sensory quality of cigarette smoke. Therefore, the content of triacetin is often an important indicator for the quality control of filter stick, and how to quickly and accurately determine the content of triacetin in filter stick has important practical significance and application value for the quality control of filter stick forming process.

[0003] With the rapid development of near infrared spectrum analysis technology, especially in the rapid detection aspect, compared with the traditional detection technology, it has the advantages of not destroying the sample, low cost, fast and so on, and is more and more favored by domestic and foreign scholars. At present, when using near infrared technology to analyze whether the content of triacetin in filter stick meets the standard, a certain amount of filter stick sample is fixed by using rubber band and the like and then put into the near infrared detection instrument for determination. In view of the timeliness of detection, the filter stick which is just produced, soft in texture and easy to deform needs to be detected. Since the aforementioned fixing method is operated by artificial on multiple filter sticks, it is easy to cause the multiple filter sticks to be distributed in a conical shape, that is, the end face cannot be in the same plane, so that the shape of the filter stick is unstable during detection, thereby affecting the accuracy of the detection result. SUMMARY

[0004] The utility model discloses a kind of filter stick fixing device and near infrared detection device, can provide a more stable fixing mode for the multiple filter sticks which are just produced, soft in texture and easy to deform, so that the end of each filter stick is in the same plane, thereby improving the accuracy of the detection result.

[0005] To solve the above technical problems, the embodiment of the utility model discloses a kind of filter stick fixing device, for fixing filter stick to be measured on near infrared spectrometer, filter stick fixing device is cylindrical, its inside is equipped with cavity, cavity is used to accommodate multiple filter sticks;

[0006] The filter stick fixing device comprises a fixed arc plate, a movable arc plate, a cover plate and a locking assembly.

[0007] The fixed arc plate has two fixed sides extending along an axial direction thereof, and the movable arc plate has two movable sides extending along an axial direction thereof, wherein at least one fixed side and at least one movable side are detachably connected through the locking assembly, so that the inner wall of the fixed arc plate and the inner wall of the movable arc plate enclose the cavity;

[0008] The cover plate is fixedly connected to one end of the fixed arc plate, and covers one end of the cavity when the fixed arc plate and the movable arc plate are connected through the locking assembly.

[0009] The above technical scheme utilizes the fixed arc plate, the movable arc plate, and the cover plate to enclose a cylindrical cavity, and the fixed arc plate and the movable arc plate are detachably connected through the locking assembly. When a plurality of filter rods are placed in the cylindrical cavity, the plurality of filter rods will present a cylindrical shape that fits the cavity, that is, the end faces of the plurality of filter rods will be in the same plane, and the length direction of the plurality of filter rods will extend along the axial direction of the fixed arc plate or the movable arc plate, so that the plurality of filter rods are in a relatively stable and unified form, thereby solving the problem that the filter rod fixing mode in the prior art easily causes the filter rod form to be unstable, and improving the accuracy of the detection result. In addition, the locking assembly is designed to provide convenience for taking and placing the plurality of filter rods.

[0010] According to another specific embodiment of the present application, the embodiment of the present application discloses a locking assembly comprising a first connecting part and a second connecting part;

[0011] The first connecting part comprises:

[0012] The first base is arranged on the outer side of the fixed arc plate;

[0013] The clamping hook is hingedly connected to the first base at one end, and is provided with a hook portion at the other end, and the clamping hook is rotatable between a first position and a second position;

[0014] The elastic member is arranged between the first base and the clamping hook, and the elastic member can exert a force on the clamping hook towards the first position;

[0015] The second connecting part comprises:

[0016] The second base is arranged on the outer side of the movable arc plate;

[0017] The protrusion is arranged on the second base, and the side surface of the protrusion away from the first connecting part is a clamping surface. When the clamping hook is located at the first position, the hook portion is hooked with the clamping surface. When the hook portion is located at the second position, the hook portion is separated from the clamping surface.

[0018] According to another specific embodiment of the utility model, the embodiment of the utility model discloses that the first base is provided with a rotating shaft, the end of the clamping hook is rotationally connected with the rotating shaft, the elastic member is a torsion spring, the torsion spring is sleeved on the rotating shaft, one end of the torsion spring abuts against the first base, and the other end abuts against the clamping hook, and the torsion spring can apply a torque to the clamping hook to rotate towards the first position.

[0019] According to another specific embodiment of the utility model, the embodiment of the utility model discloses that the number of locking assemblies is at least two, one fixed side and one movable side are connected through one locking assembly, and the other fixed side and the other movable side are connected through another locking assembly.

[0020] According to another specific embodiment of the utility model, the embodiment of the utility model discloses that one fixed side and one movable side are hingedly connected, and the other fixed side and the other movable side are connected through a locking assembly.

[0021] According to another specific embodiment of the utility model, the embodiment of the utility model discloses that the number of locking assemblies is at least two, one fixed side and one movable side are connected through one locking assembly, and the other fixed side and the other movable side are connected through another locking assembly.

[0022] According to another specific embodiment of the utility model, the embodiment of the utility model discloses that the number of locking assemblies is at least two, one fixed side and one movable side are connected through one locking assembly, and the other fixed side and the other movable side are connected through another locking assembly.

[0023] The first connecting plate is provided with a first mounting through hole extending along the axis of the cavity;

[0024] The second connecting plate is provided with a second mounting through hole extending along the axis of the cavity;

[0025] The hinge shaft passes through the first mounting through hole and the second mounting through hole in sequence, and the movable arc plate can rotate around the axis of the hinge shaft.

[0026] According to another specific embodiment of the utility model, the embodiment of the utility model discloses that the number of locking assemblies is at least two, one fixed side and one movable side are connected through one locking assembly, and the other fixed side and the other movable side are connected through another locking assembly.

[0027] According to another specific embodiment of the utility model, the embodiment of the utility model discloses that the number of locking assemblies is at least two, one fixed side and one movable side are connected through one locking assembly, and the other fixed side and the other movable side are connected through another locking assembly.

[0028] According to another specific embodiment of the utility model, the embodiment of the utility model discloses that the number of locking assemblies is at least two, one fixed side and one movable side are connected through one locking assembly, and the other fixed side and the other movable side are connected through another locking assembly.

[0029] The embodiment of the utility model discloses a near infrared detection device, including the filter stick fixing device mentioned in any one of the above embodiment, and near infrared spectrometer, sample cup and driving part, wherein, the filter stick fixing device is set to the sample cup top, and near infrared spectrometer sets to the sample cup below, and near infrared spectrometer is used to emit detection light source to filter stick, and driving part is used to drive sample cup rotation and drive each filter stick to pass through the detection port of near infrared spectrometer. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 The utility model discloses a structure schematic drawing of filter stick fixing device installation in sample cup under one angle of a specific embodiment provides;

[0031] Figure 2 The utility model discloses a structure schematic drawing of filter stick fixing device installation in sample cup under another angle of a specific embodiment provides;

[0032] Figure 3 The utility model discloses a structure schematic drawing of filter stick fixing device of installing filter stick under a specific embodiment provides in the open state;

[0033] Figure 4 The utility model discloses a structure schematic drawing of filter stick fixing device of installing filter stick under a specific embodiment provides in the closed state;

[0034] Figure 5 The utility model discloses a structure schematic drawing of fixed arc plate, cover plate, first connecting part and hinged shaft under a specific embodiment provides;

[0035] Figure 6 The utility model discloses a structure schematic drawing of movable arc plate and second connecting part under a specific embodiment provides;

[0036] Figure 7 The utility model discloses a structure schematic drawing of locking assembly under one angle of a specific embodiment provides;

[0037] Figure 8 The utility model discloses a structure schematic drawing of locking assembly under another angle of a specific embodiment provides;

[0038] Figure 9 The utility model discloses a structure schematic drawing of filter stick fixing mode in prior art under a specific embodiment provides. PREFERRED EMBODIMENT

[0039] The following describes the embodiments of the present application with specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the disclosure. Although the description of the present application will be introduced in combination with the preferred embodiments, it does not mean that the features of the present application are limited to the embodiments. On the contrary, the purpose of introducing the present application in combination with the embodiments is to cover other options or modifications that can be extended based on the claims of the present application. In order to provide a deep understanding of the present application, many specific details will be included in the following description. The present application can also be implemented without using these details. In addition, in order to avoid confusion or obscure the focus of the present application, some specific details will be omitted in the description. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0040] It should be noted that in the present specification, similar reference numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0041] In the description of the present embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present application is usually placed, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0042] The terms "first", "second", and the like are only used for differentiation and cannot be understood as indicating or implying relative importance.

[0043] In the description of the present embodiment, it should also be noted that unless otherwise explicitly specified and limited, the terms "provided", "connected", "connected" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the present embodiment can be understood according to the specific circumstances.

[0044] In order to make the purpose, technical scheme and advantages of the present application more clear, the embodiments of the present application will be further described in detail in combination with the drawings.

[0045] The prior art generally uses near-infrared detection technology to analyze whether the content of triacetin in the filter rod meets the standard. The technology first needs to use a rubber band 10 or the like to tightly fix a proper amount of filter rod 5, and then put the fixed filter rod 5 into a near-infrared detection instrument for detection. The above filter rod fixing method is shown in Figure 9 Specifically, the operator usually uses a rubber band 10 to tighten near the area close to both ends of the plurality of filter rods 5, respectively, manually adjusts the shape of the plurality of filter rods 5 after being tightened, so that the plurality of filter rods 5 as a whole is as much as possible to be a cylinder and the end portions of each filter rod 5 are in the same plane, and then inserts the plurality of filter rods 5 with the adjusted shape into the sample cup 9 of the near-infrared detection device for detection. Due to the inconsistent processing size and usage frequency of the rubber band 10, it is impossible to ensure that the tightening force of the two rubber bands 10 used at the same time is equal, which is easy to cause the plurality of filter rods 5 to be distributed in a conical shape (i.e., one end is thick and the other end is thin, as shown in Figure 9 ), and further causes the end portions of each filter rod 5 close to the detection port to be mostly not in the same plane, so that the shape of the filter rod is unstable during detection, which affects the further improvement of the accuracy of the detection result.

[0046] To solve the above problems, the embodiments of the present application provide a filter rod fixing device for fixing the filter rod 5 to be detected on a near-infrared spectrometer. As shown in Figure 1 and Figure 2 The filter rod fixing device provided by the embodiments is in a cylindrical shape, and has a cavity (not shown in the figure) inside for accommodating a plurality of filter rods 5.

[0047] The filter rod fixing device includes a fixed arc plate 1, a movable arc plate 2, a cover plate 3, and a locking assembly 4.

[0048] Referring to Figure 3 The fixed arc plate 1 has two fixed side edges 11 extending in the axial direction thereof, and the movable arc plate 2 has two movable side edges 21 extending in the axial direction thereof, wherein at least one fixed side edge 11 and at least one movable side edge 21 are detachably connected by the locking assembly 4, so that the inner wall of the fixed arc plate 1 and the inner wall of the movable arc plate 2 form a cavity.

[0049] The cover plate 3 is fixedly connected to one end of the fixed arc plate 1, and when the fixed arc plate 1 and the movable arc plate 2 are connected by the locking assembly 4, the cover plate 3 covers one end of the cavity.

[0050] The applicant, taking into full account the problems of existing filter rod fixing methods, utilizes a fixed arc plate 1, a movable arc plate 2, and a cover plate 3 to form a cylindrical cavity. The fixed arc plate 1 and the movable arc plate 2 are detachably connected via a locking assembly 4, allowing the sidewalls of the cavity to open or close, facilitating the placement and removal of the filter rods 5 within the cavity. When multiple filter rods 5 are placed within the cylindrical cavity, each filter rod 5 will conform to the cavity's shape, meaning the end face of each filter rod 5 will be in contact with the inner surface of the cover plate 3. This ensures that the end faces of each filter rod 5 are on the same plane, and their length direction extends axially along either the fixed arc plate 1 or the movable arc plate 2. The fixed arc plate 1 and the movable arc plate 2 will provide uniform force to the sidewalls of each filter rod 5, resulting in a relatively stable and uniform shape for each filter rod 5. This solves the problem of unstable filter rod shape caused by existing fixing methods, improving the accuracy of the test results. Furthermore, by designing the locking component 4, this application can also open or close the filter rod fixing device, providing convenience for the removal and placement of multiple filter rods 5. Specifically, when removing or placing the filter rod 5, the locking component 4 can be released from the lock on the fixed arc plate 1 and the movable arc plate 2, allowing at least one side of the fixed arc plate 1 and the movable arc plate 2 to separate, forming an opening on the side wall of the cavity, thereby facilitating the removal and placement of the filter rod 5. When it is necessary to fix the filter rod 5, each filter rod 5 is inserted into the cavity, and then the locking component 4 is used to lock the fixed arc plate 1 and the movable arc plate 2, so that the fixed arc plate 1 and the movable arc plate 2 fix each filter rod 5 in the cavity. Then, a force is applied to each filter rod 5 toward the cover plate 3, so that the ends of each filter rod 5 are in contact with the cover plate 3.

[0051] Furthermore, such as Figure 7 and Figure 8 As shown, the locking component 4 includes a first connecting part 41 and a second connecting part 42;

[0052] The first connecting part 41 includes:

[0053] The first base 411 is located on the outside of the fixed arc plate 1;

[0054] The hook 412 has one end hinged to the first base 411 and the other end provided with a hook 4121. The hook 412 can rotate between the first position and the second position.

[0055] An elastic element 413 is disposed between the first base 411 and the hook 412. The elastic element 413 can apply a force to the hook 412 to rotate toward the first position.

[0056] The second connecting part 42 includes:

[0057] The second base 421 is located on the outside of the movable arc plate 2;

[0058] The protrusion 422 is arranged on the second base 421, and the side of the protrusion 422 away from the first connecting part 41 is a clamping surface 4221. When the hook 412 is in the first position, as shown in Figure 8 FIG. 6, the hook part 4121 is hooked with the clamping surface 4221, and at this time, the locking device 4 can lock the fixed arc plate 1 and the movable arc plate 2. Because the elastic member 413 can exert a force on the hook 412 to rotate toward the first position, the locking device 4 can continuously lock the fixed arc plate 1 and the movable arc plate 2 without external force. When the operator exerts a force on the hook 412 to rotate the hook 412 to the second position, the hook part 4121 is separated from the clamping surface 4221, and at this time, the locking device 4 releases the locking of the fixed arc plate 1 and the movable arc plate 2.

[0059] Specifically, referring to Figure 1 , Figure 2 , Figure 3 , and Figure 4 , when near-infrared detection of the filter rods 5 is needed, a certain number of filter rods 5 (the number of filter rods can be determined according to the size of the cavity) are first counted, and then the hook 412 is rotated to the second position so that the hook part 4121 of the hook 412 is separated from the clamping surface 4221. At this time, the movable side edge 21 of the movable arc plate 2 can move away from the fixed side edge 11 of the fixed arc plate 1, that is, the filter rod fixing device of the present application is in an open state. Then, the operator places the above-mentioned counted filter rods 5 on the inside of the filter rod fixing device in the open state, and moves the open movable side edge 21 of the movable arc plate 2 toward the corresponding fixed side edge 11. When the movable side edge 21 is attached to the fixed side edge 11, the hook 412 is rotated to the first position so that the hook part 4121 of the hook 412 is hooked with the clamping surface 4221, that is, the filter rod fixing device of the present application is in a closed state. Then, the operator exerts a force on each filter rod 5 toward the cover plate 3 so that the end of each filter rod is attached to the inner surface of the cover plate 3. Then, the filter rod fixing device with multiple filter rods 5 is placed above the near-infrared spectrometer, and the end of the multiple filter rods 5 exposed outside the filter rod fixing device is close to the near-infrared spectrometer. Because each filter rod 5 has the same length and the end close to the cover plate 3 is attached to the cover plate 3, the end of each filter rod 5 close to the near-infrared spectrometer is naturally in the same plane. At this time, the operator can perform near-infrared detection on the above-mentioned multiple filter rods 5. When the near-infrared detection is completed, the operator rotates the hook 412 to the second position so that the hook part 4121 of the hook 412 is separated from the clamping surface 4221, that is, the filter rod fixing device of the present application is again in an open state, and the multiple filter rods 5 are taken out, completing the near-infrared detection of the filter rods 5. The above-mentioned steps can be repeated to perform multiple near-infrared detections.

[0060] Further, the first base 411 is provided with a rotating shaft (not shown in the figure), the end of the clamping hook 412 is rotationally connected with the rotating shaft, the elastic member 413 is a torsion spring, the torsion spring is sleeved on the rotating shaft, one end of the torsion spring abuts against the first base 411, and the other end abuts against the clamping hook 412, and the torsion spring can apply a torque to the clamping hook 412 to rotate towards the first position.

[0061] The filter rod fixing device of the utility model stores the capacity when the clamping hook 412 is rotated from the first position to the second position under the action of external force, and automatically restores the clamping hook 412 to the first position after the external force disappears, so that the clamping hook can be kept in the first position during the near-infrared detection process of the filter rod, and the stability of the filter rod fixing is improved.

[0062] In some embodiments, the number of locking assemblies 4 is at least two, one fixed side 11 and one movable side 21 are connected by one locking assembly 4, and the other fixed side 11 and the other movable side 21 are connected by the other locking assembly 4.

[0063] The filter rod fixing device of the utility model is provided with two locking assemblies 4, and is symmetrically arranged relative to the axis of the cavity, when the clamping hooks 412 in the two locking assemblies 4 are in the second position, the movable arc plate 2 can be separated from the fixed arc plate 1, that is, the filter rod fixing device of the utility model is in an open state, similarly, the movable side 21 of the movable arc plate 2 can abut against the fixed side 11 of the fixed arc plate 1, that is, the filter rod fixing device of the utility model is in a closed state, at this time, the clamping hooks 412 in the two locking assemblies 4 are in the first position, and the hook portions 4121 of the clamping hooks 412 are hooked with the corresponding clamping surfaces 4221.

[0064] In other embodiments, one fixed side 11 and one movable side 21 are hingedly connected, and the other fixed side 11 and the other movable side 21 are connected by the locking assembly 4.

[0065] Further, with reference to Figure 2 , Figure 5 and Figure 6 , the fixed arc plate 1 and the movable arc plate 2 are further provided with a hinging assembly 6, the fixed arc plate 1 and the movable arc plate 2 are hingedly connected through the hinging assembly 6, and the hinging assembly 6 and the locking assembly 4 are symmetrically arranged relative to the axis of the cavity.

[0066] Specifically, the hinging assembly 6 comprises:

[0067] a first connecting plate 61, which is provided with a first mounting through hole 611 extending along the axis of the cavity;

[0068] a second connecting plate 62, which is provided with a second mounting through hole 621 extending along the axis of the cavity;

[0069] The hinged shaft 63 passes through the first mounting through hole 611 and the second mounting through hole 621 in sequence, and the movable arc plate 2 can rotate around the axis of the hinged shaft 63.

[0070] The filter rod fixing device of the utility model can make the movable arc plate 2 rotate around the axis of the hinged shaft 63, so as to open or close the filter rod fixing device. When the filter rod fixing device is in the closed state, the operator rotates the clamping hook 412 in the locking assembly 4 to the first position, and the hook part 4121 of the clamping hook 412 is hooked with the clamping surface 4221, so as to lock the fixed arc plate 1 and the movable arc plate 2.

[0071] Exemplarily, the hinged shaft 63 is connected with the first mounting through hole 611 and the second mounting through hole 621 in an interference fit. The connection mode can not only realize the close connection between the hinged shaft 63 and the first connecting plate 61 and the second connecting plate 62, but also simplify the mechanical structure.

[0072] Further, as shown in Figs. Figure 1 , Figure 4 , Figure 5 and Figure 6 , one end of the fixed arc plate 1 and the movable arc plate 2 away from the cover plate 3 is provided with a groove 12, and the filter rod fixing device further comprises a top ring 7, one end of the top ring 7 is inserted into the groove 12, so as to fix the plurality of filter rods 5 along the circumferential direction of the cavity.

[0073] The filter rod fixing device of the utility model can fix the plurality of filter rods 5 along the circumferential direction by designing the top ring 7, which can be installed at one end of the fixed arc plate 1 and the movable arc plate 2 away from the cover plate 3, so as to more stably fix the filter rod shape.

[0074] In some embodiments, the material of the fixed arc plate 1, the movable arc plate 2 and the cover plate 3 is black hard plastic. The operator can select the material which is not transparent according to the actual use. The material which is not transparent includes but is not limited to the above-mentioned material, so as to ensure that there is no light transmission or light leakage phenomenon in the detection process, thereby improving the accuracy of the detection result.

[0075] Based on the same concept, the embodiment of the utility model further provides a near-infrared detection device, which comprises the filter rod fixing device provided by the above-mentioned embodiment, a near-infrared spectrometer (not shown in the figure), a sample cup 9 and a driving part 8, wherein the filter rod fixing device is arranged above the sample cup 9, the near-infrared spectrometer is arranged below the sample cup 9, the near-infrared spectrometer is used for emitting a detection light source to the filter rod 5, and the driving part 8 is used for driving the sample cup 9 to rotate and driving each filter rod 5 to pass through the detection port of the near-infrared spectrometer.

[0076] Specifically, the driving member 8 is provided with a connecting pad below, and part of the connecting pad is in contact with the sample cup 9, when the driving member 8 is started, the connecting pad will be rotated, and in turn the sample cup 9 is rotated, at the same time, the filter rod fixing device placed on the sample cup 9 and containing the filter rod 5 will also rotate following the rotation of the sample cup 9, so that the plurality of filter rods can uniformly receive the irradiation of the detection light source, ensure the uniformity of detection, and improve the accuracy of the detection result.

[0077] It should be noted that in the examples and descriptions of the present application, the relationship terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between the entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment. Without more limitations, the element defined by the statement "including one" does not exclude the presence of another identical element in the process, method, article or equipment including the element.

[0078] Although the present application has been illustrated and described with reference to certain preferred embodiments thereof, it should be understood that the above description is a further detailed explanation of the present application in conjunction with the specific embodiments, and the specific implementation of the present application should not be limited to these descriptions. Those skilled in the art can make various changes in form and details, including making a number of simple deductions or substitutions, without departing from the spirit and scope of the present application.

Claims

1. A filter rod fixing device for fixing a filter rod to be measured on a near infrared spectrometer, characterized in that, The filter stick fixing device is in a cylindrical shape, and has a cavity inside for accommodating a plurality of filter sticks; The filter stick fixing device comprises a fixed arc plate, a movable arc plate, a cover plate and a locking assembly; The fixed arc plate has two fixed side edges extending along its axial direction, and the movable arc plate has two movable side edges extending along its axial direction, wherein at least one of the fixed side edges and at least one of the movable side edges are detachably connected by the locking assembly, so that the inner wall of the fixed arc plate and the inner wall of the movable arc plate enclose the cavity; The cover plate is fixedly connected with one end of the fixed arc plate, and covers one end of the cavity when the fixed arc plate and the movable arc plate are connected by the locking assembly.

2. A filter rod holder device according to claim 1, characterised in that The locking assembly comprises a first connecting part and a second connecting part; The first connecting part comprises: a first base provided on the outside of the fixed arc plate; a clasp hingedly connected to the first base at one end and provided with a hook portion at the other end, the clasp being rotatable between a first position and a second position; a resilient member provided between the first base and the clasp, the resilient member being capable of exerting a force on the clasp to rotate towards the first position; The second connecting part comprises: a second base provided on the outside of the movable arc plate; a protrusion provided on the second base, the side of the protrusion away from the first connecting part being a latching surface, the hook portion being latched with the latching surface when the clasp is in the first position, and the hook portion being separated from the latching surface when the hook portion is in the second position.

3. A filter rod holder device according to claim 2, wherein A rotating shaft is provided on the first base, and the end of the clasp is rotatably connected to the rotating shaft, the resilient member is a torsion spring, the torsion spring is sleeved on the rotating shaft, one end of the torsion spring abuts against the first base, and the other end of the torsion spring abuts against the clasp, the torsion spring being capable of exerting a torque on the clasp to rotate towards the first position.

4. A filter rod holder device according to any one of claims 1 to 3, wherein The number of the locking assemblies is at least two, one of the fixed side edges and one of the movable side edges being connected by one of the locking assemblies, and the other of the fixed side edges and the other of the movable side edges being connected by the other of the locking assemblies.

5. A filter rod holder device according to any one of claims 1 to 3, wherein One of the fixed side edges and one of the movable side edges are hingedly connected, and the other of the fixed side edges and the other of the movable side edges are connected by the locking assembly.

6. A filter rod holder device as claimed in claim 5, characterised in that A hinging assembly is further provided between the fixed arc plate and the movable arc plate, the fixed arc plate and the movable arc plate being hingedly connected by the hinging assembly, the hinging assembly and the locking assembly being symmetrically arranged with respect to the axis of the cavity.

7. A filter rod holder device as claimed in claim 6, characterised in that The hinging assembly comprises: a first connecting plate provided with a first mounting through hole extending along the axis of the cavity; a second connecting plate provided with a second mounting through hole extending along the axis of the cavity; a hinging shaft sequentially penetrating through the first mounting through hole and the second mounting through hole, the movable arc plate being rotatable about the axis of the hinging shaft.

8. A filter rod holder device as claimed in claim 7, characterised in that The hinging shaft is in interference fit with the first mounting through hole and the second mounting through hole.

9. A filter rod holder device as claimed in claim 7, characterised in that The end of the fixed arc plate and the movable arc plate away from the cover plate is provided with a groove, and the filter stick fixing device further comprises a top ring, one end of the top ring is inserted into the groove to fix a plurality of filter sticks along the circumferential direction of the cavity.

10. A filter rod holder device as claimed in claim 1, characterised in that The material of the fixed arc plate, the movable arc plate and the cover plate is black hard plastic.

11. A near infrared detection device, characterized by The filter stick fixing device as claimed in any one of claims 1 to 10, and a near-infrared spectrometer, a sample cup and a driving element, wherein the filter stick fixing device is arranged above the sample cup, the near-infrared spectrometer is arranged below the sample cup, the near-infrared spectrometer is used for emitting a detection light source to the filter stick, and the driving element is used for driving the sample cup to rotate and driving each filter stick to pass through a detection port of the near-infrared spectrometer.

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