Grating rotation driving structure and atomic absorption spectrophotometer

Abstract

The utility model relates to the field of detection equipment, in particular to a grating rotation driving structure and an atomic absorption spectrophotometer, the grating rotation driving structure comprises a mounting rack and a grating rotatably arranged on the mounting rack, the driving structure further comprises a driving rod, one end of the driving rod is rotatably connected with the grating, and the other end of the driving rod is provided with a driving end; the linear driving assembly comprises a sliding block capable of sliding and a driving part for driving the sliding block to move, and the sliding block can drive the driving end to move so that the driving rod can drive the grating to rotate; one end of the elastic piece is connected with the driving rod, the other end of the elastic piece is connected with the mounting frame or the sliding block, and the elastic piece can enable the driving end to abut against the sliding block. According to the grating rotation driving structure and the atomic absorption spectrophotometer provided by the utility model, the existing problems are effectively solved by optimizing and improving the grating rotation driving structure.

Description

Technical Field

[0001] This utility model relates to the field of detection equipment, and in particular to a grating rotation drive structure and an atomic absorption spectrophotometer. Background Technology

[0002] An atomic absorption spectrophotometer is a specialized spectral detection instrument. The instrument emits light with characteristic spectral lines of the analyte from a light source. When the light passes through the sample vapor, it is absorbed by the ground-state atoms of the analyte in the vapor. The content of the analyte in the sample is determined by the degree to which the characteristic spectral lines of the emitted light are attenuated.

[0003] When processing the optical path in a light source, a grating is needed to decompose light of different wavelengths and direct it in different directions. In actual detection, the grating needs to be rotated and adjusted, as shown in the structure of an optical component and spectrometer disclosed in utility model patent application number 202221711473.9, where the grating is driven to rotate by a power transmission mechanism. Currently, existing grating transmission mechanisms, such as the one in the prior art patent, involve a motor indirectly driving the transmission through a first link, a second link, and a hinged connection. The transmission components require high assembly precision, and the grating rotation accuracy is easily affected by the transmission assembly gaps, making it difficult to control the stability and accuracy of the grating rotation. Based on this, the applicant proposes a grating rotation drive structure and an atomic absorption spectrophotometer. Utility Model Content

[0004] To address the aforementioned technical problems, this invention provides a grating rotation drive structure and an atomic absorption spectrophotometer. By optimizing and improving the grating rotation drive structure, the existing problems are effectively solved.

[0005] To address the aforementioned problems, this utility model provides a grating rotation drive structure, including a mounting frame and a grating rotatably mounted on the mounting frame. The drive structure further includes: a drive rod, one end of which is rotatably connected to the grating, and the other end forming a drive end; a linear drive assembly, including a slidable slider and a drive member that moves the slider, the slider being able to drive the drive end to move so that the drive rod drives the grating to rotate; and an elastic member, one end of which is connected to the drive rod and the other end of which is connected to the mounting frame or the slider, the elastic member being able to cause the drive end to abut against the slider.

[0006] Furthermore, the drive rod is provided with a roller at the drive end position, and the roller abuts against the slider.

[0007] Furthermore, the slider is provided with a guide bar that abuts against the roller.

[0008] Furthermore, the elastic element is configured as a spring.

[0009] Furthermore, the end of the drive rod away from the drive end is provided with a through groove, the grating is provided with a connecting rod that can pass through the through groove, and the part of the connecting rod extending out of the drive rod is threadedly screwed with a fixing block.

[0010] Furthermore, the driving component includes a lead screw that cooperates with the slider and a motor that drives the lead screw to rotate.

[0011] Furthermore, the slider is connected to a marking part, and the mounting bracket is provided with a positioning switch on the slider's movement path.

[0012] Furthermore, the positioning switch is configured as a photoelectric switch.

[0013] This invention also provides an atomic absorption spectrophotometer, including the grating rotation drive structure described above.

[0014] The beneficial effect of this utility model is that it effectively solves the existing problems by optimizing and improving the rotation drive structure of the grating. Attached Figure Description

[0015] The accompanying drawings, which are included to provide a further understanding of the present invention and constitute a part of this invention, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0016] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model.

[0017] Figure 2 for Figure 1 A schematic diagram of the structure at the bottom of the mounting bracket in the illustrated embodiment.

[0018] The components are: 1. Mounting bracket; 2. Grating; 3. Drive rod; 4. Drive end; 5. Slider; 6. Roller; 7. Guide bar; 8. Spring; 9. Through groove; 10. Connecting rod; 11. Fixing block; 12. Lead screw; 13. Motor; 14. Marking part; 15. Positioning switch. Detailed Implementation

[0019] To more clearly illustrate the overall concept of this utility model, a detailed description will be provided below with reference to the accompanying drawings.

[0020] It should be noted that many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0021] Furthermore, it should be understood in the description of this utility model that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model.

[0022] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral unit; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. However, specifying a direct connection indicates that the two main bodies at the connection point are not connected by an intermediate structure, but are simply connected to form a whole through a connecting structure. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0023] In this utility model, unless otherwise expressly specified and limited, the first feature "on" or "below" the second feature may be in direct contact with the first and second features, or indirect contact through an intermediate medium. In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0024] In this utility model, such as Figures 1 to 2 As shown, a grating rotation drive structure is provided, including a mounting frame 1 and a grating 2 rotatably disposed on the mounting frame 1. The drive structure further includes: a drive rod 3, one end of which is rotatably connected to the grating 2, and the other end forming a drive end 4; a linear drive assembly, including a slidable slider 5 and a drive member that drives the slider 5 to move, the slider 5 being able to drive the drive end 4 to move, so that the drive rod 3 drives the grating to rotate; and an elastic member, one end of which is connected to the drive rod 3 and the other end of which is connected to the mounting frame 1 or the slider 5, the elastic member being able to cause the drive end 4 to abut against the slider 5.

[0025] In use, the driving structure of this invention utilizes a driving component to move the slider 5, while an elastic component presses the driving section of the driving rod 3 against the slider 5. This allows the slider 5 to drive the driving rod 3 to rotate, thereby rotating the grating. The driving structure of this invention, by using an elastic component to press the driving end 4 of the driving rod 3 against the slider 5, maintains a tight fit between the slider 5 and the driving rod 3, preventing assembly gaps between the slider 5 and the driving rod 3 that could cause the grating to loosen. This allows for a simpler assembly method where the driving end 4 of the driving rod 3 abuts against the slider 5, reducing the requirements for assembly gaps. This invention controls the linear movement of the slider 5 to drive the rotation of the driving rod 3. By monitoring the movement position of the slider 5, the rotation angle of the grating 2 can be monitored. As shown in the figure, by utilizing the length of the driving rod 3 to amplify the travel distance of the slider 5 per unit angle rotation of the grating 2, the rotation angle of the grating 2 can be monitored relatively accurately based on the travel distance of the slider 5.

[0026] In a preferred embodiment, more specifically regarding the structure of this utility model, the drive rod 3 is provided with a roller 6 at the drive end 4, and the roller 6 abuts against the slider 5.

[0027] As shown in the figure, by setting the roller 6, the relative movement between the drive end 4 of the drive rod 3 and the slider 5 can be made smoother.

[0028] In a preferred embodiment, specifically regarding the structure of this invention, the slider 5 is provided with a guide strip 7 that abuts against the roller 6. As shown in the figure, by providing the guide strip 7, the roller 6 can roll along the guide strip 7.

[0029] In a preferred embodiment, specifically regarding the structure of this utility model, the elastic element is configured as a spring 8. As shown in the figure, one end of the spring 8 is connected to the middle section of the drive rod 3, and the other end is connected to the mounting bracket 1. This allows the spring 8 to pull the drive rod 3 so that the roller 6 remains in contact with the guide bar 7 when the slider 5 pushes the drive end 4 of the drive rod 3 to move.

[0030] In an alternative embodiment, the spring 8 may also be fixed to the slider 5.

[0031] In a preferred embodiment, more specifically regarding the structure of this utility model, the end of the drive rod 3 away from the drive end 4 is provided with a through groove 9, the grating 2 is provided with a connecting rod 10 that can pass through the through groove 9, and the portion of the connecting rod 10 extending out of the drive rod 3 is threadedly fitted with a fixing block 11.

[0032] As shown in the figure, this allows adjustment of the position of the connecting rod 10 within the through slot 9, determining the actual distance between the driving end 4 of the driving rod 3 and the rotation axis of the grating, thus facilitating adjustment of the rotation amplitude of the grating 2. After adjustment, the driving rod 3 can be fixed by screwing the fixing block 11 onto it.

[0033] In a preferred embodiment, more specifically regarding the structure of this utility model, the driving component includes a lead screw 12 that cooperates with the slider 5 and a motor 13 that drives the lead screw 12 to rotate.

[0034] As shown in the figure, by using lead screw 12 to drive slider 5, the self-locking stability of lead screw 12 can ensure the angular stability after the grating rotation is adjusted. Moreover, the lead screw 12 can control the movement of slider 5 relatively stably.

[0035] In a preferred embodiment, more specifically regarding the structure of this utility model, the slider 5 is connected to a marking part 14, and the mounting bracket 1 is provided with a positioning switch 15 on the moving path of the slider 5.

[0036] As shown in the figure, the positioning switch 15 can periodically move the slider 5 to the position of the positioning switch 15 to mark the origin, so as to facilitate the initial position marking of the grating 2 before adjusting the angle.

[0037] In a preferred embodiment, specifically regarding the structure of this invention, the positioning switch 15 is configured as a photoelectric switch. As shown in the figure, the marking part 14 is configured as a marking plate for the slider 5. Moving the marking plate to the position of the photoelectric switch can trigger the photoelectric switch for origin positioning.

[0038] This invention also provides an atomic absorption spectrophotometer, including the grating rotation drive structure described above. It should be noted that the atomic absorption spectrophotometer of this invention only improves the rotation drive structure of the grating 2; it does not restrict improvements to other structural components of the atomic absorption spectrophotometer. Those skilled in the art can flexibly select other existing structural components during implementation.

[0039] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to interchangeably. Each embodiment focuses on describing the differences from other embodiments. In particular, the system embodiments are basically similar to the method embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions in the method embodiments.

[0040] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A grating rotation driving structure comprising a mounting frame, a grating rotatably arranged on the mounting frame, characterized in that, The driving structure further comprises: a driving rod, one end of which is rotatably connected with the grating, and the other end of which is provided with a driving end; a linear driving assembly, which comprises a slidable sliding block and a driving member for moving the sliding block, the sliding block being capable of moving the driving end so that the driving rod drives the grating to rotate; a resilient member, one end of which is connected with the driving rod and the other end of which is connected with the mounting frame or the sliding block, the resilient member being capable of abutting the driving end against the sliding block.

2. The grating rotation driving structure according to claim 1, wherein The driving rod is provided with a roller at the position of the driving end, and the roller abuts against the sliding block.

3. The grating rotation driving structure according to claim 2, wherein The sliding block is provided with a guide strip abutting against the roller.

4. The grating rotation driving structure according to claim 1, wherein The resilient member is a spring.

5. The grating rotation driving structure according to claim 1, wherein The driving rod is provided with a through slot at the end away from the driving end, the grating is provided with a connecting rod capable of passing through the through slot, and the part of the connecting rod extending out of the driving rod is screw-coupled with a fixing block.

6. The grating rotation driving structure according to claim 1, wherein The driving member comprises a screw rod matched with the sliding block and a motor for driving the screw rod to rotate.

7. The grating rotation driving structure according to claim 1, wherein The sliding block is connected with a marking part, and the mounting frame is provided with a positioning switch on the moving path of the sliding block.

8. The grating rotation driving structure according to claim 7, wherein The positioning switch is an optoelectronic switch.

9. An atomic absorption spectrophotometer characterized by comprising: The application further provides a grating rotation driving structure comprising any one of the grating rotation driving structures according to claims 1 to 8.

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