Stable detection structure of ultramicro spectrophotometer

Abstract

The utility model discloses a stable detection structure of an ultramicro spectrophotometer, which comprises a fixed plate, the bottom of the fixed plate is fixedly connected with a motor fixing seat and a support plate, and a rotating plate is hinged above the fixed plate; a second optical fiber is installed in the rotating plate, optical fiber heads at the two ends of the second optical fiber correspond to optical fiber heads of the first optical fiber and the third optical fiber in the vertical direction, the second optical fiber is fixedly connected into the fixing plate, and the third optical fiber is fixed to the transmission block. Linear sliding grooves are formed in the left side and the right side of the transmission block correspondingly, adjusting blocks are installed in the linear sliding grooves, and light barriers are installed on the opposite outer sides of the two adjusting blocks correspondingly. Photoelectric switches corresponding to the light barriers are installed on the front side and the rear side of the motor fixing base. According to the stable detection structure of the ultramicro spectrophotometer provided by the utility model, the position of the light barrier can be accurately adjusted, accurate positioning of ultramicro measurement is realized, and the problem that an optical fiber head is easy to collide can be solved.

Description

Technical Field

[0001] The utility model relates to a stable detection structure of an ultra-micro spectrophotometer, belonging to the technical field of detection. Background Art

[0002] Ultra-micro spectrophotometer has become a routine instrument in modern molecular biology laboratories. It is often used for nucleic acid, protein quantification and bacterial growth concentration quantification. The reason why ultra-micro spectrophotometer can detect trace sample stock solution without dilution is that it can adjust the optical path of the droplet. The smaller the optical path, the higher the detectable sample concentration.

[0003] The ultra-micro spectrophotometer in the prior art generally has the following technical problems in the process of adjusting the droplet optical path:

[0004] 1. Accurate positioning of ultra-micro measurement is achieved through the cooperation of photoelectric switches and light shields. At present, the light shield is installed in a way that the light shield is directly fixed on the liftable transmission block with a long hole. The screws are loosened during adjustment. Due to the gap in the screw holes, the light shield will move in the horizontal and vertical directions, making it difficult to make precise adjustments, which will lead to a large deviation in the optical path of the ultra-micro spectrophotometer.

[0005] 2. During the adjustment process or when the photoelectric switch is not working, the fiber optic head is prone to collision, affecting the detection stability of the equipment.

[0006] In summary, the prior art obviously has inconveniences and defects in practical use, so it is necessary to improve it. Utility Model Content

[0007] The utility model aims at the deficiencies in the background technology and provides a stable detection structure of an ultra-micro spectrophotometer, which can make the light shielding plate accurately adjust its position, realize accurate positioning of ultra-micro measurement, and solve the problem that the optical fiber head is prone to collision.

[0008] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0009] The ultra-micro-spectrophotometer stable detection structure comprises a fixed plate, a motor fixing seat and a support plate are fixedly connected to the bottom of the fixed plate, and a rotating plate is hinged above the fixed plate;

[0010] A second optical fiber is installed in the rotating plate, and the optical fiber heads at both ends of the second optical fiber are arranged along the vertical direction corresponding to the optical fiber heads of the first optical fiber and the third optical fiber. The second optical fiber is fixed in the fixed plate, and the third optical fiber is fixed on the transmission block.

[0011] There are linear slides on the left and right sides of the transmission block, with adjustment blocks installed inside the linear slides. Light shields are installed on the facing outer sides of the two adjustment blocks; photoelectric switches corresponding to the light shields are installed on the front and rear sides of the motor fixing seat.

[0012] Furthermore, a limit block is installed at the bottom of the fixed plate, and the limit block is located above the transmission block.

[0013] Furthermore, the transmission block is connected to the motor via a motor anti-backlash nut.

[0014] Furthermore, the motor is fixedly connected to the bottom of the motor fixing seat, the motor anti-backlash nut is installed on the output screw of the motor, and the transmission block is fixedly connected to the motor anti-backlash nut.

[0015] Furthermore, a sliding block and a sliding rail are slidably connected between the transmission block and the motor fixing seat, the transmission block is fixedly connected to the sliding block, and the sliding rail is fixedly connected to the motor fixing seat along the vertical direction.

[0016] Furthermore, the adjusting block is provided with an elongated hole, and a screw for fixing the adjusting block and the transmission block is passed through the elongated hole.

[0017] Furthermore, the linear slide groove is arranged along the vertical direction.

[0018] Furthermore, the light shielding plates on both sides of the transmission block are arranged in a staggered manner, one high and one low.

[0019] Furthermore, an adjusting screw is installed in the rotating plate.

[0020] Furthermore, the support plate is located on the periphery of the motor fixing seat.

[0021] Compared with the prior art, the utility model has the following advantages after adopting the above technical solution:

[0022] The photoelectric switch in the utility model is fixed on the motor fixing seat, stable and immovable, and the light shield is fixed on the transmission block through the adjustment block, thereby ensuring synchronous displacement with the third optical fiber to achieve the purpose of detecting the position of the third optical fiber and realize accurate positioning of ultra-micro measurement;

[0023] The light shielding plate in the utility model is fixed on the adjusting block, and the adjusting block is located in the linear slide grooves on both sides of the transmission block. The adjusting block can only move in the vertical direction to avoid horizontal displacement, thereby increasing the stability of the light shielding plate.

[0024] The utility model installs a limit block at the bottom of the fixed plate. When the transmission block exceeds the travel range during the adjustment process or when the photoelectric switch is not working, it first hits the limit block to form a hard limit, thereby avoiding collision of the optical fiber head and playing a protective role.

[0025] The utility model is described in detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural stereogram of the utility model;

[0027] Figure 2 It is a top view of the structure of the utility model;

[0028] Figure 3 yes Figure 2 Structural cross-section view at AA in the middle;

[0029] Figure 4 yes Figure 2 Structural cross-section view at the middle BB;

[0030] Figure 5 This is the installation diagram of the transmission block.

[0031] In the figure, 1-first optical fiber, 2-second optical fiber, 3-adjusting screw, 4-rotating plate, 5-fixed plate, 6-support plate, 7-limiting block, 8-third optical fiber, 9-transmission block, 10-motor, 11-motor fixing seat, 12-photoelectric switch, 13-light baffle, 14-adjusting block, 15-motor anti-backlash nut, 16-slider, 17-slide rail. DETAILED DESCRIPTION

[0032] In order to have a clearer understanding of the technical features, purposes and effects of the utility model, the specific implementation methods of the utility model are now described with reference to the accompanying drawings.

[0033] like Figure 1-Figure 5 As shown together, the utility model provides a stable detection structure of an ultra-micro spectrophotometer, including a fixed plate 5, a motor fixing seat 11 and a support plate 6 are fixedly connected to the bottom of the fixed plate 5, the support plate 6 is located on the periphery of the motor fixing seat 11, and a rotating plate 4 is hinged above the fixed plate 5.

[0034] The rotating plate 4 is provided with a second optical fiber 2 having an arc-shaped structure. The optical fiber heads at both ends of the second optical fiber 2 are arranged corresponding to the optical fiber heads of the first optical fiber 1 and the third optical fiber 8 along the vertical direction.

[0035] The second optical fiber 2 is fixed in the fixing plate 5 , and the third optical fiber 8 is fixed on the lifting and lowering transmission block 9 .

[0036] The transmission block 9 is connected to the motor 10 through the motor anti-backlash nut 15. The motor 10 is fixed to the bottom of the motor fixing seat 11. The motor anti-backlash nut 15 is installed on the output screw of the motor 10. The transmission block 9 is fixedly connected to the motor anti-backlash nut 15.

[0037] During the rotation process, the motor 10 drives the motor anti-backlash nut 15 to move up and down, thereby driving the transmission block 9 and the third optical fiber 8 to move up and down.

[0038] A slider 16 and a slide rail 17 are slidably connected between the transmission block 9 and the motor fixing seat 11. The transmission block 9 is fixedly connected to the slider 16, and the slide rail 17 is fixedly connected to the motor fixing seat 11 in a vertical direction. The cooperation of the slider 16 and the slide rail 17 ensures the straightness and stability of the transmission block 9 and the third optical fiber 8 during the lifting process.

[0039] The left and right sides of the transmission block 9 are respectively provided with linear slide grooves arranged in the vertical direction, and an adjustment block 14 is installed inside the linear slide groove. The adjustment block 14 is provided with a long hole, and screws are penetrated in the long hole to fix the adjustment block 14 and the transmission block 9.

[0040] Light shielding plates 13 are installed on the facing outer sides of the two adjustment blocks 14, and the light shielding plates 13 on both sides of the transmission block 9 are staggered, one high and one low.

[0041] Photoelectric switches 12 are respectively installed on the front and rear sides of the motor fixing seat 11 , and the photoelectric switches 12 and the light shielding plates 13 are arranged in a one-to-one correspondence.

[0042] A limit block 7 is installed at the bottom of the fixing plate 5. The limit block 7 is located above the transmission block 9. The limit block 7 forms a hard limit with the transmission block 9 below to avoid collision between the fiber heads of the second optical fiber 2 and the third optical fiber 8.

[0043] An adjusting screw 3 is installed in the rotating plate 4 , and the adjusting screw 3 is used to adjust the distance between the rotating plate 4 and the fixed plate 5 .

[0044] The specific working principle of this utility model:

[0045] The optical path signal is input by the first optical fiber 1, and transmitted to the third optical fiber 8 through the second optical fiber 2. By adjusting the vertical position of the third optical fiber 8, an optical connection is formed to achieve the purpose of ultra-micro measurement. The third optical fiber 8 is fixed on the transmission block 9, and the transmission block 9 is connected to the output screw of the motor 10 through the motor anti-backlash nut 15, so that the motor 10 transmits power to the third optical fiber 8, adjusts the vertical position of the third optical fiber 8, and then adjusts the optical path of the droplet.

[0046] The photoelectric switch 12 in the utility model is fixed on the motor fixing seat 11 and is stable. The light shielding plate 13 is fixed on the transmission block 9 through the adjustment block 14, thereby ensuring synchronous displacement with the third optical fiber 8 to achieve the purpose of detecting the position of the third optical fiber 8 and realize accurate positioning of ultra-micro measurement.

[0047] The light shielding plate 13 in the utility model is fixed on the adjusting block 14, and the adjusting block 14 is located in the linear slide grooves on both sides of the transmission block 9. The adjusting block 14 can only move in the vertical direction to avoid horizontal displacement, thereby increasing the stability of the light shielding plate.

[0048] The utility model installs a limit block 7 at the bottom of the fixed plate 5. During the adjustment process or when the photoelectric switch 12 is not working, the transmission block 9 first hits the limit block 7 when it exceeds the travel, forming a hard limit to avoid collision of the optical fiber head and play a protective role.

[0049] The above is an example of the best implementation of the utility model, and the parts not described in detail are common knowledge of ordinary technicians in this field. The protection scope of the utility model is based on the content of the claims, and any equivalent transformation based on the technical inspiration of the utility model is also within the protection scope of the utility model.

Claims

1. Ultra-micro spectrophotometer stable detection structure, characterized by: It comprises a fixed plate (5), the bottom of which is fixedly connected to a motor fixing seat (11) and a supporting plate (6), and the top of which is hingedly connected to a rotating plate (4); A second optical fiber (2) is installed in the rotating plate (4), and the optical fiber heads at both ends of the second optical fiber (2) are arranged in a vertical direction corresponding to the optical fiber heads of the first optical fiber (1) and the third optical fiber (8). The second optical fiber (2) is fixed in the fixed plate (5), and the third optical fiber (8) is fixed on the transmission block (9); The transmission block (9) is provided with linear slide grooves on the left and right sides respectively, and an adjustment block (14) is installed inside the linear slide groove. Light shielding plates (13) are installed on the opposite outer sides of the two adjustment blocks (14); and photoelectric switches (12) corresponding to the light shielding plates (13) are installed on the front and rear sides of the motor fixing seat (11).

2. The stable detection structure of the ultra-micro spectrophotometer according to claim 1, characterized in that: A limit block (7) is installed at the bottom of the fixed plate (5), and the limit block (7) is located above the transmission block (9).

3. The stable detection structure of the ultra-micro spectrophotometer according to claim 1, characterized in that: The transmission block (9) is connected to the motor (10) via a motor anti-backlash nut (15).

4. The ultra-micro spectrophotometer stable detection structure as claimed in claim 3, characterized in that: The motor (10) is fixedly connected to the bottom of the motor fixing seat (11), the motor anti-backlash nut (15) is installed on the output screw of the motor (10), and the transmission block (9) is fixedly connected to the motor anti-backlash nut (15).

5. The ultra-micro spectrophotometer stable detection structure as claimed in claim 4, characterized in that: A sliding block (16) and a sliding rail (17) are slidably connected between the transmission block (9) and the motor fixing seat (11); the transmission block (9) is fixedly connected to the sliding block (16); and the sliding rail (17) is fixedly connected to the motor fixing seat (11) in a vertical direction.

6. The stable detection structure of the ultra-micro spectrophotometer according to claim 1, characterized in that: The adjusting block (14) is provided with an elongated hole, and a screw is passed through the elongated hole to fix the adjusting block (14) and the transmission block (9).

7. The stable detection structure of the ultra-micro spectrophotometer according to claim 1, characterized in that: The linear slide is arranged along the vertical direction.

8. The stable detection structure of the ultra-micro spectrophotometer according to claim 1, characterized in that: The light shielding plates (13) on both sides of the transmission block (9) are arranged in a staggered manner, one high and one low.

9. The stable detection structure of the ultra-micro spectrophotometer according to claim 1, characterized in that: An adjusting screw (3) is installed inside the rotating plate (4).

10. The stable detection structure of the ultra-micro spectrophotometer according to claim 1, characterized in that: The support plate (6) is located on the periphery of the motor fixing seat (11).

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