Spectrophotometer

Abstract

The utility model relates to the technical field of medical instruments, and provides a spectrophotometer which comprises a machine body, a movable seat, a cuvette connecting frame and an adjusting bracket, the movable seat is fixedly arranged in the sample chamber; the cuvette connecting frame is detachably fixed on the movable seat, and a mounting groove is formed in the top side of the cuvette connecting frame; the adjusting support comprises a limiting rod, the limiting rod is detachably fixed to the top side of the cuvette connecting frame and located in the mounting groove, the relative position of the limiting rod and the cuvette connecting frame is adjustable, a plurality of first clamping grooves and second clamping grooves are formed in the top side of the cuvette connecting frame, and the first clamping grooves and the second clamping grooves are located in the mounting groove. The adjusting supports are arranged at the two ends of the cuvette connecting frame, the relative positions of the limiting rods on the adjusting supports and the cuvette connecting frame are adjustable, the width of the mounting groove is adjusted by adjusting the positions of the limiting rods so as to be suitable for placing cuvettes of different specifications, re-correction is not needed after adjustment, and the operation process is simplified.

Description

Technical Field

[0001] The utility model relates to the technical fields of analytical chemistry and optics, in particular to a spectrophotometer. Background Art

[0002] A spectrophotometer is an instrument used to measure a substance's ability to absorb light of different wavelengths. It is widely used in chemistry, biology, medicine, environmental science, materials science, and other fields, and plays an important role in both qualitative and quantitative analysis.

[0003] The spectrophotometer uses a light source that can generate multiple wavelengths. Through a series of spectroscopic devices, a light source of a specific wavelength is generated. After the light passes through the test sample, part of the light is absorbed. The absorbance value of the sample is calculated and converted into the concentration of the sample. The absorbance value of the sample is proportional to the concentration of the sample.

[0004] The utility model with patent publication number CN221631277U discloses a spectrophotometer, including a sample chamber, a mounting seat is provided in the sample chamber, a light source and a receiver are respectively provided on both sides of the sample chamber, and light holes corresponding to the light source and the receiver are provided on two opposite side walls of the sample chamber; a turntable and a drive device are provided in the sample chamber, and the turntable rotates on one of the side walls provided with the light holes; a black body and a reference solution box are provided on the turntable.

[0005] In the above technical solution, a movable mounting base is provided in the sample chamber, which is used to place the cuvette. However, the commonly used cuvettes are of two sizes: 10 mm and 50 mm, and both have cuvette racks of corresponding sizes for fixing. When replacing, the original size needs to be removed and then replaced, which is time-consuming and labor-intensive. In addition, the cuvette rack needs to be recalibrated after replacement to ensure that the light spot is in the middle position, and the operation process is cumbersome. Utility Model Content

[0006] In view of this, the utility model proposes a spectrophotometer, which can fix cuvettes of different specifications and simplify the operation process.

[0007] The technical solution of the present invention is implemented as follows: The present invention provides a spectrophotometer, including a body, a movable seat, a cuvette rack and an adjustment bracket, wherein:

[0008] A sample chamber is provided in the body;

[0009] The movable seat is fixedly arranged in the sample chamber;

[0010] The cuvette bracket is detachably fixed to the movable seat, and a mounting groove is provided on the top side thereof;

[0011] The adjustment bracket includes a limiting rod, which is detachably fixed to the top side of the cuvette bracket and located in the mounting groove. The relative position of the limiting rod and the cuvette bracket is adjustable.

[0012] More preferably, a plurality of first card slots and second card slots are provided on the top side of the cuvette bracket, the first card slots are located at the top of the mounting slot, the second card slots are located at the top outside the mounting slot, and the limiting rod is engaged with the first card slot or the second card slot.

[0013] More preferably, a plurality of the mounting slots are provided on the cuvette rack, and the plurality of mounting slots are evenly distributed.

[0014] On the basis of the above technical solution, preferably, the adjustment bracket further includes a side bracket and a connecting rod, wherein,

[0015] The side brackets are arranged at both ends of the cuvette rack;

[0016] One end of the connecting rod is rotatably arranged on the side bracket, and the other end is fixedly connected to the limiting rod.

[0017] More preferably, the adjustment bracket further includes a connecting seat, a guide column, a push plate and a first spring, wherein,

[0018] The connecting seat is fixedly arranged on the cuvette bracket;

[0019] The guide post is fixedly arranged on the connecting seat;

[0020] The push plate is slidably arranged on the guide column, and the push plate is fixedly connected to the side bracket;

[0021] The first spring is sleeved on the guide column, and two ends of the first spring are respectively against the connecting seat and the push plate.

[0022] On the basis of the above technical solution, preferably, the movable seat includes a base and a slide seat, wherein,

[0023] The base is fixedly arranged at the bottom of the sample chamber;

[0024] The slide is slidably arranged on the base, and the cuvette bracket is fixedly arranged on the slide.

[0025] More preferably, the movable seat further includes a support, a rod fixing seat, a rod, a second spring and a stop block, wherein:

[0026] The support is fixedly arranged at the bottom of the slide;

[0027] The rod fixing seat is fixedly arranged on the support;

[0028] The insertion rod is slidably arranged in the insertion rod fixing seat;

[0029] The second spring is sleeved on the lower part of the insertion rod, and the two ends of the second spring are respectively against the insertion rod fixing seat and the insertion rod;

[0030] The stop block is fixedly arranged on the top of the insertion rod, and the stop block is located above the insertion rod fixing seat.

[0031] More preferably, a plurality of evenly distributed circular holes are provided on the bottom of the base, and the bottom of the insertion rod is plugged into the circular holes.

[0032] On the basis of the above technical solution, preferably, it further comprises a push rod device, the push rod device comprises a push rod support and a push rod, wherein,

[0033] The support rod is fixedly arranged at one end of the slide;

[0034] The push rod passes through and is slidably arranged in the push rod support, and is supported by the push block;

[0035] The side of the stop block abutting against the stop rod is inclined, and the distance between the side of the stop block abutting against the stop rod and the stop rod away from the stop block gradually decreases from bottom to top.

[0036] More preferably, the push rod device further includes a rod sleeve, a push rod and a third spring, wherein:

[0037] One end of the rod sleeve is detachably fixed to the rod support, and the other end of the rod sleeve passes through the sample chamber and extends to the outside of the body;

[0038] The push rod is slidably arranged in the rod sleeve, and one end of the push rod is in contact with the abutment rod;

[0039] The third spring is sleeved on the push rod, and two ends of the third spring are respectively abutted against the rod sleeve and the push rod.

[0040] The spectrophotometer of the utility model has the following beneficial effects compared with the prior art:

[0041] (1) By arranging adjustment brackets at both ends of the cuvette bracket, the relative position of the limit rod on the adjustment bracket and the cuvette bracket can be adjusted. By adjusting the position of the limit rod, the width of the installation slot can be adjusted to be suitable for the placement of cuvettes of different specifications. No recalibration is required after adjustment, which simplifies the operation process. The first spring plays an elastic supporting role on the opposite side bracket, pushing the connecting rod downward, thereby tightening the limit rod to prevent the limit rod from falling off from the slot.

[0042] (2) A liftable plug rod is provided on the movable seat and is pushed by a push rod device. The plug rod is pushed by a push rod to drive the plug rod up and down, and the plug rod is connected to the circular hole on the base to limit the slide, thereby improving the firmness and stability of the slide when it is fixed. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0044] Figure 1 A three-dimensional diagram of a spectrophotometer of the present utility model;

[0045] Figure 2 This is a three-dimensional diagram of a movable seat in a spectrophotometer of the present invention;

[0046] Figure 3 This is an exploded structural diagram of a movable seat in a spectrophotometer of the present invention;

[0047] Figure 4 This is a partial enlarged view of the movable seat in a spectrophotometer of the present invention;

[0048] Figure 5 This is a three-dimensional diagram of a cuvette coupling frame in a spectrophotometer of the present invention;

[0049] Figure 6 This is a three-dimensional diagram of an adjustment bracket in a spectrophotometer of the present invention;

[0050] Figure 7 This is a partial enlarged view of the connecting seat in a spectrophotometer of the present utility model.

[0051] Wherein: 1. Machine body; 101. Sample chamber; 2. Movable seat; 21. Base; 22. Slide; 23. Support; 24. Rod fixing seat; 25. Rod; 26. Second spring; 27. Block; 3. Cuvette bracket; 301. Mounting slot; 302. First card slot; 303. Second card slot; 4. Adjustment bracket; 41. Side bracket; 42. Connecting rod; 43. Limiting rod; 44. Connecting seat; 45. Guide column; 46. Push plate; 47. First spring; 5. Push rod device; 51. Push rod support; 52. Push rod; 53. Rod sleeve; 54. Push rod; 55. Third spring. DETAILED DESCRIPTION

[0052] The following will be combined with the specific embodiments of the present invention to clearly and completely describe the technical solutions of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0053] like Figure 1-7 As shown, a spectrophotometer of the present invention comprises a body 1, a movable seat 2, a cuvette rack 3, an adjustment bracket 4 and a push rod device 5.

[0054] Various optical components are arranged in the body 1 , and the sample chamber 101 is arranged in the body 1 .

[0055] The movable seat 2 is fixedly arranged in the sample chamber 101. The movable seat 2 is used to drive the cuvette rack 3 to move back and forth. The movable seat 2 includes a base 21 and a slide 22, wherein the base 21 is fixedly arranged at the bottom of the sample chamber 101, the slide 22 is slidably arranged on the base 21, and the cuvette rack 3 is fixedly arranged on the slide 22, and the cuvette rack 3 is driven to move back and forth by the slide 22.

[0056] like Figure 4 As shown, the movable seat 2 also includes a support 23, a rod fixing seat 24, a rod 25, a second spring 26 and a stop block 27, wherein the support 23 is fixedly arranged at the bottom of the slide 22, the rod fixing seat 24 is fixedly arranged on the support 23, and the rod 25 is movably arranged in the rod fixing seat 24, thereby realizing the extension and contraction of the rod 25, and the second spring 26 is sleeved on the lower part of the rod 25, and the second spring 26 is located below the rod fixing seat 24, and the two ends of the second spring 26 are respectively abutted against the rod fixing seat 24 and the rod 25, and the second spring 26 plays an elastic supporting role on the rod 25, so that the rod 25 remains in an extended state downward.

[0057] like Figure 3 As shown, a plurality of evenly distributed circular holes are provided at the bottom of the base 21, and the bottom of the insertion rod 25 is extended and plugged into the circular hole, which serves as a limit for the slide 22 to prevent the slide 22 from moving during the detection process, and under the action of the second spring 26, the insertion rod 25 is prevented from being separated from the circular hole, thereby improving the firmness and stability of the slide 22 when it is fixed.

[0058] like Figure 2As shown, the cuvette bracket 3 is detachably fixed to the movable seat 2, and a plurality of evenly distributed mounting grooves 301 for mounting cuvettes are provided on the cuvette bracket 3. The cuvettes are inserted and placed in the mounting grooves 301, and a plurality of first card slots 302 and second card slots 303 are provided on the top side of the cuvette bracket 3. The first card slots 302 are located at the top of the mounting grooves 301, and the second card slots 303 are located at the top outside the mounting grooves 301. The width of the mounting groove 301 can be adjusted by engaging with different card slots through the limiting rod 43.

[0059] like Figure 5 As shown, the adjustment bracket 4 is used to adjust the width of the mounting groove 301. The adjustment bracket 4 includes a limit rod 43. The limit rod 43 is detachably fixed to the top side of the cuvette bracket 3 and is located in the mounting groove 301. The top side of the cuvette bracket 3 is provided with a first clamping groove 302 and a second clamping groove 303. The limit rod 43 is engaged with the first clamping groove 302 or the second clamping groove 303, so that the relative position of the limit rod 43 and the cuvette bracket 3 is adjustable. When the limit rod 43 is engaged with the first clamping groove 302, the position of the mounting groove 301 where the cuvette can be installed is reduced due to the obstruction of the limit rod 43, so that a small-sized cuvette can be installed; when the limit rod 43 is engaged with the second clamping groove 303, the limit rod 43 moves out of the mounting groove 301, so that a large-sized cuvette can be installed.

[0060] like Figure 6 As shown, the adjustment bracket 4 includes a connecting seat 44, a guide column 45, a push plate 46 and a first spring 47, wherein the connecting seat 44 is fixedly set on the cuvette bracket 3 to play a supporting role, the guide column 45 is fixedly set on the connecting seat 44 to guide the push plate 46, and the push plate 46 is slidably set on the guide column 45 to realize the up and down sliding of the push plate 46.

[0061] like Figure 6 As shown, the adjustment bracket 4 also includes a side bracket 41 and a connecting rod 42. The side bracket 41 is fixedly set on the push plate 46, and the side bracket 41 can be driven to slide up and down by the push plate 46. One end of the connecting rod 42 is rotatably set on the side bracket 41, and the other end is fixedly connected to the limit rod 43. The installation position of the limit rod 43 is adjusted by rotating the connecting rod 42.

[0062] In order to prevent the limit rod 43 from falling off, the first spring 47 is sleeved on the guide column 45, and the two ends of the first spring 47 are respectively against the connecting seat 44 and the push plate 46, and the opposite side bracket 41 plays an elastic supporting role, pushing the connecting rod 42 downward, thereby tightening the limit rod 43 to prevent the limit rod 43 from falling off from the slot.

[0063] The push rod device 5 is used to push the insertion rod 25 up and down. The push rod device 5 includes a push rod support 51 and a push rod 52. The push rod support 51 is fixedly set at one end of the slide 22 to guide the push rod 52. The push rod 52 passes through and is slidably set in the push rod support 51. The extension and contraction of the push rod 52 are achieved by sliding the push rod 52.

[0064] like Figure 3 As shown, the push rod device 5 also includes a rod sleeve 53, a push rod 54 and a third spring 55, wherein one end of the rod sleeve 53 is detachably fixed to one end of the push rod support 51 for easy disassembly, and the other end of the rod sleeve 53 passes through the sample chamber 101 and extends to the outside of the body 1. After disassembly, the rod sleeve 53 can be pulled out of the body 1; the push rod 54 is slidably set in the rod sleeve 53, and one end of the push rod 54 is in contact with the push rod 52, and the push rod 54 is used to push the push rod 52 to move; the third spring 55 is sleeved on the push rod 54, and the two ends of the third spring 55 are in contact with the rod sleeve 53 and the push rod 54 respectively. The third spring 55 plays an elastic supporting role on the push rod 54, so that the push rod 54 can automatically rebound after being pressed, which is convenient for pressing next time.

[0065] In order to facilitate lifting the insertion rod 25, a stop block 27 is fixed on the top of the insertion rod 25, and the stop block 27 is located above the insertion rod fixing seat 24. The push rod 52 is supported by the stop block 27. The side where the stop block 27 is in contact with the push rod 52 is inclined, and the distance between the side where the stop block 27 is in contact with the push rod 52 and the push rod 52 away from the stop block 27 gradually decreases from bottom to top. When the push rod 52 presses the inclined surface of the stop block 27 with force, the stop block 27 will rise under the action of the inclined surface, thereby lifting the insertion rod 25.

[0066] The method of using the spectrophotometer of the utility model is as follows:

[0067] First, turn on the machine for preheating, then open the sample chamber 101, select a cuvette of appropriate size, and adjust the limit rod 43 to the fixed position corresponding to the cuvette. When adjusting, push the push plate 46 upward to disengage the limit rod 43 from the original slot, then rotate the connecting rod 42 to move the limit rod 43 to the corresponding slot, loosen the push plate 46, so that the push plate 46 automatically returns to its original position and tighten the limit rod 43, install the cuvette filled with solution into the installation slot 301, and move the slide 22 to the cuvette. The solution in the container is measured. When the slide 22 is moved, the push rod 54 is pushed, so that the push rod 54 pushes the push rod 52, so that the insertion rod 25 rises. At this time, the insertion rod 25 is not completely separated from the circular hole on the base 21, and the moving distance can be sensed by the friction between the bottom of the insertion rod 25 and the edge of the circular hole. When the insertion rod 25 enters the next circular hole, the push rod 54 is released, and the insertion rod 25 rebounds under the action of the second spring 26 and is reinserted into the circular hole, which plays a limiting role on the slide 22 and fixes the position of the slide 22.

[0068] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A spectrophotometer, characterized in that: It comprises a body (1), a movable seat (2), a cuvette rack (3) and an adjustment bracket (4), wherein: A sample chamber (101) is provided in the body (1); The movable seat (2) is fixedly arranged in the sample chamber (101); The cuvette bracket (3) is detachably fixed to the movable seat (2), and a mounting groove (301) is provided on the top side thereof; The adjustment bracket (4) includes a limiting rod (43), which is detachably fixed to the top side of the cuvette bracket (3) and located in the mounting groove (301), and the relative position of the limiting rod (43) and the cuvette bracket (3) is adjustable.

2. A spectrophotometer according to claim 1, characterized in that: The top side of the cuvette rack (3) is provided with a plurality of first card slots (302) and second card slots (303), wherein the first card slots (302) are located at the top of the mounting slot (301), and the second card slots (303) are located at the top outside the mounting slot (301), and the limiting rod (43) is engaged with the first card slot (302) or the second card slot (303).

3. A spectrophotometer according to claim 2, characterized in that: A plurality of the mounting grooves (301) are provided on the cuvette rack (3), and the plurality of mounting grooves (301) are evenly distributed.

4. A spectrophotometer according to claim 3, characterized in that: The adjustment bracket (4) further includes a side bracket (41) and a connecting rod (42), wherein: The side brackets (41) are arranged at both ends of the cuvette rack (3); One end of the connecting rod (42) is rotatably arranged on the side bracket (41), and the other end is fixedly connected to the limiting rod (43).

5. A spectrophotometer according to claim 4, characterized in that: The adjustment bracket (4) further includes a connecting seat (44), a guide column (45), a push plate (46) and a first spring (47), wherein: The connecting seat (44) is fixedly arranged on the cuvette bracket (3); The guide column (45) is fixedly arranged on the connecting seat (44); The push plate (46) is slidably arranged on the guide column (45), and the push plate (46) is fixedly connected to the side bracket (41); The first spring (47) is sleeved on the guide column (45), and two ends of the first spring (47) are respectively abutted against the connecting seat (44) and the push plate (46).

6. A spectrophotometer according to claim 1, characterized in that: The movable seat (2) comprises a base (21) and a slide seat (22), wherein: The base (21) is fixedly arranged at the bottom of the sample chamber (101); The slide seat (22) is slidably arranged on the base (21), and the cuvette rack (3) is fixedly arranged on the slide seat (22).

7. A spectrophotometer according to claim 6, characterized in that: The movable seat (2) further comprises a support (23), an insert rod fixing seat (24), an insert rod (25), a second spring (26) and a stop block (27), wherein: The support (23) is fixedly arranged on the bottom of the slide (22); The rod fixing seat (24) is fixedly arranged on the support (23); The insertion rod (25) is slidably arranged in the insertion rod fixing seat (24); The second spring (26) is sleeved on the lower part of the insertion rod (25), and the two ends of the second spring (26) are respectively abutted against the insertion rod fixing seat (24) and the insertion rod (25); The stop block (27) is fixedly arranged on the top of the insertion rod (25), and the stop block (27) is located above the insertion rod fixing seat (24).

8. A spectrophotometer according to claim 7, characterized in that: The bottom of the base (21) is provided with a plurality of evenly distributed circular holes, and the bottom of the insertion rod (25) is plugged into the circular holes.

9. A spectrophotometer according to claim 7, characterized in that: It also includes a push rod device (5), which includes a push rod support (51) and a push rod (52), wherein: The support rod seat (51) is fixedly arranged on one end of the slide seat (22); The push rod (52) passes through and is slidably disposed in the push rod support (51), and is in contact with the push block (27); The side where the block (27) abuts against the push rod (52) is inclined, and the distance between the side where the block (27) abuts against the push rod (52) and the push rod (52) away from the block (27) gradually decreases from bottom to top.

10. A spectrophotometer according to claim 9, characterized in that: The push rod device (5) further comprises a rod sleeve (53), a push rod (54) and a third spring (55), wherein: One end of the rod sleeve (53) is detachably fixed to the rod support (51), and the other end of the rod sleeve (53) passes through the sample chamber (101) and extends to the outside of the body (1); The push rod (54) is slidably arranged in the rod sleeve (53), and one end of the push rod (54) is in contact with the abutment rod (52); The third spring (55) is sleeved on the push rod (54), and two ends of the third spring (55) are respectively abutted against the rod sleeve (53) and the push rod (54).

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