CN202599827U - Three-optical-path positioning device of micro-spectrophotometer - Google Patents
Three-optical-path positioning device of micro-spectrophotometer Download PDFInfo
- Publication number
- CN202599827U CN202599827U CN 201220168635 CN201220168635U CN202599827U CN 202599827 U CN202599827 U CN 202599827U CN 201220168635 CN201220168635 CN 201220168635 CN 201220168635 U CN201220168635 U CN 201220168635U CN 202599827 U CN202599827 U CN 202599827U
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- moving member
- cam
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- optical fiber
- detection arm
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Abstract
The utility model relates to a three-optical-path positioning device of a micro-spectrophotometer. The three-optical-path positioning device of the micro-spectrophotometer comprises a detection table, optical fiber bases, a positioning device, cams and a motor. The three-optical-path positioning device of the micro-spectrophotometer is characterized in that the detection table consists of an upper detection arm and a lower detection arm, two optical fiber bases are respectively installed at one ends of two detection arms, the optical fiber base of the lower detection arm is fixedly arranged on the positioning device and can move up and down with a movable piece in the positioning device, and the maximum moving distance is limited by two limiting rods on the positioning device; two cams with different sizes are fixedly arranged on the rotating shaft of the motor; when the motor rotates, a small cam upwards and downwards push a positioning piece in the positioning device, the positioning piece pushes the movable piece, a large cam downwards pushes the movable piece, and the optical fiber base which is fixedly arranged on the movable piece moves three times to realize three-optical-path positioning. The three-optical-path positioning device of the micro-spectrophotometer has the advantages that three optical paths can be accuracy positioned, and the accuracy and the repeatability of the micro-spectrophotometer are improved.
Description
Technical field
The utility model relates to a kind of locating device, especially relates to three light path locating devices of micro-spectrophotometer.
Background technology
Advantages such as micro-spectrophotometer is few because of its amount of samples, need not cuvette, and the measuring samples concentration range is wide, and is easy to use once release, just receive numerous clients' approval and welcome very soon.This technology is to utilize the surface tension of micro liquid between the optical fiber pedestal of two close, to form light-path, and the distance between two optical fiber pedestals is exactly a light path.By Lambert-Beer's law A=ε bc, when absorbance was constant, concentration c and light path b were inversely proportional to, and the absorbance scope difference that can survey between the instrument is little, and when light path b was very little, instrument can directly be measured enriched sample.
At present, the ultramicrospectrophotometer that occurs on the market generally is monochromatic light journey or two light paths, and the instrument of monochromatic light journey has only a fixing light path, the sample concentration narrow range of energy measurement; The instrument of two light paths is when measuring; Can switch automatically through solenoid valve between two light paths; The repeatability of location and accuracy be comparative maturity all, enlarged the measurement range of sample concentration, but concentration range is wide not enough; And two light path measurement range junctions, the measurement of concetration linearity is good inadequately.
The micro-spectrophotometer that has occurred three light paths recently again carries out three light paths location through linear stepping motor; Advantage is further to have enlarged the measurement of concetration scope, and three light path measurement range junctions, the measurement of concetration linearity is fine; Shortcoming be linear stepping motor apart from control aspect out of true, and the time grown motor wearing and tearing and also can bring error, the accuracy that causes measuring is not high, repeatability is bad.
Summary of the invention
The purpose of the utility model is to overcome the deficiency of prior art, and a kind of three light path locating devices of micro-spectrophotometer are provided, and can accurately locate three light paths, and reduces the error brought because of frictional dissipation between the parts.
The technical scheme that the utility model adopts is: comprise monitor station, optical fiber pedestal, locating device, cam and motor; It is characterized in that: monitor station is by detection arm and last detection arm are formed down; Last detection arm is installed in down on the detection arm with the hinge form; Last detection arm one end is fixed an optical fiber pedestal, and following detection arm one end is equipped with an optical fiber pedestal that upper-lower position is adjustable through locating device, and corresponding up and down with the optical fiber pedestal of said upward detection arm; Individual moving member is arranged in the said locating device, and the said optical fiber pedestal of detection arm down is fixed on the moving member, and can move up and down with moving member, and the ultimate range that moves is limited the gag lever post at two ends about the locating device; Fixing two cams that vary in size on the machine shaft, when motor rotated, little cam made progress, promotes moving member downwards, and big cam promotes moving member downwards, and the optical fiber pedestal that is fixed on the moving member moves three times with moving member, thereby realizes three light paths location.
One side of said moving member has a circular groove, and a gag lever post is fixed in the lower end of circular groove, and said big cam is corresponding with the pulley on gag lever post top, and big cam can promote gag lever post moving member is moved down during work; The circular groove the inside also has a square groove, and said square groove and circular groove are coaxial, and square groove two ends correspondence position up and down respectively has a through hole, and a movable block is housed in the through hole, and the outside is blocked with fixed dam.
Spring also is housed between said movable block and the fixed dam; Spring keeps certain stroke pressing movable block all the time; The movable block other end is equipped with pulley; Cam contacts with pulley movable block is moved during work, and movable block moves moving member through spring pressure again, so just can compensate the error that causes the parts loss to cause because of long-time friction between cam and the pulley.
The maximum radius place of said big cam and little cam forms an angle, when little cam upwards, when promoting moving member downwards, big cam does not promote moving member, when big cam promoted moving member, little cam did not promote moving member.
The distance that said big cam promotes moving member is limited the gag lever post on the moving member, and promotes the distance that moving member moves less than little cam.
Be provided with a spring between the bottom of moving member and the fixed mount, spring supports moving member makes moving member that individual original state arranged.
The principle of work of the utility model is: solution can form fluid column because of surface tension properties between the pedestal of optical fiber up and down of two close, the distance between the optical fiber pedestal is light path, and the distance that changes between two optical fiber pedestals can change light path.Before motor rotated, moving member was in an initial position because of spring supports, and when motor rotates, drove cam rotation, and two moving members moved about little cam maximum radius place promoted successively, lived until limited pole spacing; Big cam maximum radius place promotes moving member and moves down a fixing position; Therefore down the optical fiber pedestal of detection arm moves to three fixing positions with moving member, three distances that promptly are fixed between two optical fiber pedestals on the detection arm up and down, thus realize three light paths location.
The utility model compared with prior art, its remarkable advantage is: 1, position fixing not exclusively relies on the number of turns that motor rotates, accurate positioning.2, regulate through spring between cam and the moving member, compensated the error that parts bring because of frictional dissipation, accuracy is high, good reproducibility.
Description of drawings
Fig. 1 is the structural representation of the utility model;
Fig. 2 is the sectional view of moving member;
Fig. 3 is the left view of moving member.
Embodiment
Below in conjunction with accompanying drawing the utility model is described further:
Shown in accompanying drawing, three light path locating devices of the micro-spectrophotometer of a kind of embodiment of the utility model comprise monitor station, optical fiber pedestal 3, locating device, cam and motor 9.Wherein, Monitor station is by detection arm 1 and last detection arm 4 are formed down; Last detection arm 4 is installed in down on the detection arm 1 with the hinge form; Last detection arm 4 one ends are fixed an optical fiber pedestal 3, and following detection arm 1 one ends are equipped with an optical fiber pedestal 3 that upper-lower position is adjustable through locating device, and corresponding about in the of 3 in the optical fiber pedestal of said upward detection arm 4.Individual moving member 6 is arranged in the said locating device, and the said optical fiber pedestal 3 of detection arm 1 down is fixed on the moving member 6, and can move up and down with moving member 6, and the ultimate range that moves has stationary installation gag lever post 2 qualifications at two ends up and down.A fixing big cam 12 and a little cam 15 in motor 9 rotating shafts; When motor 9 rotated, little cam 15 promoted moving member 6 upwards, downwards, and big cam 12 promotes moving member 6 downwards; The optical fiber pedestal 3 that is fixed on the moving member 6 moves three times with moving member, thereby realizes three light paths location.
One side of said moving member has a circular groove 10, and a gag lever post 14 is fixed in the lower end of circular groove, and said big cam 12 is corresponding with the pulley 13 on gag lever post 14 tops, and big cam 12 can promote gag lever post 14 moving member 6 is moved down during work; Circular groove 10 the insides also have a square groove 11, and said square groove 11 is coaxial with circular groove 10, and square groove two ends correspondence position up and down respectively has a through hole, and a movable block 53 is housed in the through hole, and the outside is blocked with fixed head 51.
Between said movable block 53 and the fixed dam 51 spring 52 is housed also; Spring 52 keeps certain stroke pressing movable block 53 all the time; Movable block 53 other ends are equipped with pulley 54; Cam 15 contacts with pulley 54 movable block 53 is moved during work, and movable block 53 moves moving member 6 through spring pressure again, so just can compensate the error that causes the parts loss to cause because of long-time friction between cam 15 and the pulley 54.
The maximum radius place of said big cam 12 and little cam 15 forms an angle, when little cam 15 upwards, when promoting moving member 6 downwards, big cam 12 does not promote moving member 6, when big cam 12 promoted moving members 6, little cam 15 did not promote moving member 6.
The distance that said big cam 15 promotes moving member 6 is limited the gag lever post on the moving member 6, and promotes the distance that moving member 6 moves less than little cam 15.
Be provided with a spring 8 between the bottom of moving member 6 and the fixed mount 7, spring 8 supports moving member 6 makes moving member 6 that individual original state arranged.
The use of the utility model is following:
Before motor 9 rotated, moving member 6 was in an initial position because of spring 8 supports, and when motor 9 rotates, drives cam rotation, and two moving members 6 moved about little cam 15 maximum radius places promoted successively, blocked until limited bar 2; Big cam 15 maximum radius places promote moving member 6 and move down a fixing position; Therefore down the optical fiber pedestal 3 of detection arm 1 move with moving member 6 moving to three fixing positions, three distances that promptly are fixed between two optical fiber pedestals 3 on the detection arm up and down, thus realize three light paths location.
Claims (6)
1. three light path locating devices of a micro-spectrophotometer; Comprise monitor station, optical fiber pedestal, locating device, cam and motor; It is characterized in that: monitor station is made up of following detection arm and last detection arm, and last detection arm is installed in down on the detection arm with the hinge form, and last detection arm one end is fixed an optical fiber pedestal; Following detection arm one end is equipped with an optical fiber pedestal that upper-lower position is adjustable through locating device, and corresponding up and down with the optical fiber pedestal of said upward detection arm; Individual moving member is arranged in the said locating device, and the said optical fiber pedestal of detection arm down is fixed on the moving member, and can move up and down with moving member, and the ultimate range that moves is limited the gag lever post at two ends about the locating device; Fixing two cams that vary in size on the machine shaft, when motor rotated, little cam made progress, promotes moving member downwards, and big cam promotes moving member downwards, and the optical fiber pedestal that is fixed on the moving member moves three times with moving member, thereby realizes three light paths location.
2. three light path locating devices of micro-spectrophotometer according to claim 1; It is characterized in that: a side of said moving member has a circular groove; A gag lever post is fixed in the lower end of circular groove; Said big cam is corresponding with the pulley on gag lever post top, and big cam can promote gag lever post moving member is moved down during work; The circular groove the inside also has a square groove, and said square groove and circular groove are coaxial, and square groove two ends correspondence position up and down respectively has a through hole, and a movable block is housed in the through hole, and the outside is blocked with fixed dam.
3. three light path locating devices of micro-spectrophotometer according to claim 2; It is characterized in that: spring also is housed between said movable block and the fixed dam; Spring keeps certain stroke pressing movable block all the time, and the movable block other end is equipped with pulley, and cam contacts with pulley movable block is moved during work; Movable block moves moving member through spring pressure again, so just can compensate the error that causes the parts loss to cause because of long-time friction between cam and the pulley.
4. three light path locating devices of micro-spectrophotometer according to claim 1; It is characterized in that: the maximum radius place of said big cam and little cam forms an angle; When little cam upwards, when promoting moving member downwards; Big cam does not promote moving member, and when big cam promoted moving member, little cam did not promote moving member.
5. three light path locating devices of micro-spectrophotometer according to claim 3 is characterized in that: the distance that said big cam promotes moving member is limited the gag lever post on the moving member, and the distance that moves less than little cam promotion moving member.
6. three light path locating devices of micro-spectrophotometer according to claim 3 is characterized in that: be provided with a spring between the bottom of moving member and the fixed mount, spring supports moving member makes moving member that individual original state arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220168635 CN202599827U (en) | 2012-04-20 | 2012-04-20 | Three-optical-path positioning device of micro-spectrophotometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220168635 CN202599827U (en) | 2012-04-20 | 2012-04-20 | Three-optical-path positioning device of micro-spectrophotometer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202599827U true CN202599827U (en) | 2012-12-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220168635 Expired - Fee Related CN202599827U (en) | 2012-04-20 | 2012-04-20 | Three-optical-path positioning device of micro-spectrophotometer |
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| CN (1) | CN202599827U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111624167A (en) * | 2020-05-22 | 2020-09-04 | 尤尼柯（上海）仪器有限公司 | Xenon lamp type ultramicro photometer device |
-
2012
- 2012-04-20 CN CN 201220168635 patent/CN202599827U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111624167A (en) * | 2020-05-22 | 2020-09-04 | 尤尼柯（上海）仪器有限公司 | Xenon lamp type ultramicro photometer device |
| CN111624167B (en) * | 2020-05-22 | 2023-03-14 | 尤尼柯（上海）仪器有限公司 | Xenon lamp type ultramicro photometer device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121212 Termination date: 20130420 |