A cuvette holder for a spectrophotometer

Abstract

The utility model relates to a colorimetric cup frame for spectrophotometer, including fixed frame, frame seat, first connecting axle stem, second connecting axle stem, gear, rack and base, the fixed frame is equipped with the spacing batten for fixing colorimetric cup in, the fixed frame with frame seat is detachably connected, be equipped with the jack on the frame seat, the first connecting axle stem is inserted in the jack, be equipped with the first connecting piece on the frame seat, the second connecting axle stem is knitted and has the second connecting piece, the first connecting piece with second connecting piece passes through screw fixed connection, the rack with gear engages, the rack passes through third connecting piece and is connected with frame seat, the gear is connected with the drive shaft of step motor, the gear rotates under the driving of step motor, step motor installs on the base. Realize not to dismount colorimetric cup frame as a whole, only need to unload fixed frame from frame seat, can thoroughly clean the fixed frame of depositing colorimetric cup.

Description

Technical Field

[0001] This utility model relates to the field of spectrophotometer technology, specifically to a cuvette holder for a spectrophotometer. Background Technology

[0002] As an essential instrument in chemical analysis, environmental monitoring, and biological detection, the core function of a spectrophotometer relies on the precise positioning and stable operation of the cuvette holder in the sample chamber. Traditional cuvette holders mostly employ manual adjustment or simple mechanical transmission structures. These suffer from drawbacks such as the inability to freely replace cuvettes and their incompatibility with various cuvette sizes. Utility Model Content

[0003] The purpose of this invention is to provide a cuvette holder for a spectrophotometer to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: A cuvette holder for a spectrophotometer includes a fixed frame, a frame base, a first connecting shaft, a second connecting shaft, a gear, a rack, and a base. The fixed frame contains a limiting plate for fixing the cuvettes. The fixed frame is detachably connected to the frame base. The frame base has an insertion hole into which the first connecting shaft is inserted. The frame base has a first connecting member, and the second connecting shaft is fitted with a second connecting member. The first and second connecting members are fixedly connected by screws. The rack meshes with the gear and is connected to the frame base via a third connecting member. The gear is connected to the drive shaft of a stepper motor and rotates under the drive of the stepper motor. The stepper motor is mounted on the base.

[0005] In one possible implementation, a protrusion is formed at the bottom of the fixing frame, and the fixing frame is inserted into a groove on the frame base through the protrusion.

[0006] In one possible implementation, a mounting groove is formed on the base, and the stepper motor is mounted in the mounting groove.

[0007] In one possible implementation, a support is formed on the lower end face of the rack, and the rack is fixed to the base by the support.

[0008] In one possible implementation, the third connector and the rack are integrally formed by machining, and the third connector is fixedly connected to the frame base by screws.

[0009] Compared with the prior art, the present invention has the following advantages: 1. The cuvette holder does not need to be completely disassembled; simply remove the fixing frame from the frame base to thoroughly clean the fixing frame that holds the cuvettes. 2. Different sizes of fixing frames can be replaced according to requirements to adapt to different testing requirements. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the exploded structure of this utility model; Figure 3 This is a partial structural diagram of the present utility model. Detailed Implementation

[0011] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0012] like Figure 1-3 As shown, a cuvette holder for a spectrophotometer includes a fixed frame 10, a frame base 20, a first connecting shaft 41, a second connecting shaft 42, a gear 43, a rack 44, and a base 30. The fixed frame 10 has a limiting plate for fixing the cuvettes. The fixed frame 10 is detachably connected to the frame base 20. The frame base 20 has an insertion hole 21, and the first connecting shaft 41 is inserted into the insertion hole 21. The frame base 20 has a first connecting member 22, and the second connecting shaft 42 is fitted with a second connecting member 46. The first connecting member 22 and the second connecting member 46 are fixedly connected by screws. The rack 44 meshes with the gear 43 and is fixedly connected to the frame base 20. The gear 43 is connected to the drive shaft of a stepper motor 50 and rotates under the drive of the stepper motor 50. The stepper motor 50 is mounted on the base 30. A mounting groove 32 is formed on the base 30, and the stepper motor 50 is installed in the mounting groove 32. The stepper motor 50 is embedded in the mounting groove 32. When the stepper motor 50 operates, the drive shaft rotates. Since the drive shaft is inserted into the gear 43, the gear 43 rotates along with the drive shaft. Furthermore, to increase the stability of the rack 44, a support member 45 is formed on the lower end face of the rack 44, and the rack 44 is fixed to the base 30 by the support member 45. The support member 45 provides effective support for the rack 44, preventing the rack 44 from failing to effectively mesh with the gear 43 during operation.

[0013] The rack 44 and the frame base 20 can be connected by welding, snap-fit, or other methods. As an optimal connection method, two third connecting parts 47 are formed on the rack 44 through machining, such as cutting. Each third connecting part 47 has screw holes, and corresponding holes are provided on the frame base 20. Screws are passed through these two holes, and then the nuts are rotated to tighten the screws, thus fixing the rack 44 and the frame base 20. A protrusion 11 is formed at the bottom of the fixing frame 10. The fixing frame 10 is inserted into a groove on the frame base 20 through the protrusion 11, completing the installation and fixing of the fixing frame 10 and the frame base 20. The fixing frame 10 can be installed or removed by inserting and removing the protrusion 11. When cleaning the fixing frame 10 is required, the pin is removed, the fixing frame 10 is taken off, cleaned, and then the fixing frame 10 is installed back onto the frame base 20. Similarly, when it is necessary to replace cuvettes of different sizes, simply remove the original fixing frame 10 and then install the next fixing frame 10 to complete the replacement. There is no need to replace the entire cuvette rack, which greatly improves the replacement efficiency. At the same time, the installation is simple and easy to operate.

[0014] In use, first insert the required fixing frame 10 into the groove through the protrusion 11 to fix the fixing frame 10 and the frame base 20. Then, start the stepper motor 50 so that the gear 43 rotates with the drive shaft of the stepper motor 50. The rack 44 will move linearly under the drive of the gear 43. Finally, since the rack 44 is connected to the frame base 20, and the frame base 20 is connected to the fixing frame 10, the fixing frame 10 will carry the cuvette placed between the two limiting plates and move linearly along the radial direction of the first connecting shaft 41 and the second connecting shaft 42 under the drive of the rack 44 to complete the sample injection.

[0015] In the description of this utility model, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "side", "top", "inner", "front", "center", "both ends", "left and right", "front and back", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the 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.

[0016] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "setting," "connection," "fixing," "screw connection," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; 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. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances. The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A cuvette holder for a spectrophotometer, characterized in that, The device includes a fixed frame (10), a frame base (20), a first connecting shaft (41), a second connecting shaft (42), a gear (43), a rack (44), and a base (30). The fixed frame (10) is provided with a limiting plate for fixing the cuvette. The fixed frame (10) is detachably connected to the frame base (20). The frame base (20) is provided with an insertion hole (21). The first connecting shaft (41) is inserted into the insertion hole (21). The frame base (20) is provided with a first connector (22). A second connecting member (46) is sleeved on the second connecting shaft (42). The first connecting member (22) and the second connecting member (46) are fixedly connected by screws. The rack (44) meshes with the gear (43). The rack (44) is fixedly connected to the frame (20). The gear (43) is connected to the drive shaft of the stepper motor (50). The gear (43) rotates under the drive of the stepper motor (50). The stepper motor (50) is mounted on the base (30).

2. The cuvette holder for a spectrophotometer according to claim 1, characterized in that, The bottom of the fixing frame (10) has a protrusion (11), and the fixing frame (10) is inserted into the groove on the frame base (20) through the protrusion (11).

3. The cuvette holder for a spectrophotometer according to claim 1, characterized in that, A mounting groove (32) is formed on the base (30), and the stepper motor (50) is installed in the mounting groove (32).

4. The cuvette holder for a spectrophotometer according to claim 1, characterized in that, A support member (45) is formed on the lower end surface of the rack (44), and the rack (44) is fixed to the base (30) by the support member (45).

5. The cuvette holder for a spectrophotometer according to claim 1, characterized in that, The rack (44) is connected to the frame (20) via a third connector (47).

6. The cuvette holder for a spectrophotometer according to claim 5, characterized in that, The third connector (47) and the rack (44) are integrally formed by machining, and the third connector (47) is fixedly connected to the frame base (20) by screws.

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