CN211453343U

CN211453343U - Spectrophotometer

Info

Publication number: CN211453343U
Application number: CN202020057193.5U
Authority: CN
Inventors: 车万里; 朱瑞杰; 郑统宁
Original assignee: Beijing Aberdeen Biotechnology Co ltd
Current assignee: Beijing Aberdeen Biotechnology Co ltd
Priority date: 2020-01-10
Filing date: 2020-01-10
Publication date: 2020-09-08
Anticipated expiration: 2030-01-10

Abstract

The utility model relates to a spectrophotometer, which comprises a body, wherein a measuring cavity is arranged on the body, a colorimetric stand for placing a cuvette with a sample and a light detection device for detecting the sample are arranged in the measuring cavity; the body is provided with a display screen for displaying measurement data and a button for controlling detection; a signal amplifier is arranged between the display screen and the optical detection device, an installation block is arranged in the measurement cavity, and a T-shaped groove is arranged on the upper side surface of the installation block; the colorimetric frame is embedded in the T-shaped groove and is in sliding connection with the mounting block; openings are respectively arranged on two sides of the T-shaped groove, the size of each opening is matched with that of the sliding block, and the sliding block is embedded into the T-shaped groove through the openings; be provided with the pull rod on the color comparison frame, the outside to the body is worn out to the one end of pull rod. The utility model discloses can comparatively convenient contrast look frame dismantle, when cleaning it, more conveniently align and carry out cleaning operation.

Description

Spectrophotometer

Technical Field

The utility model belongs to the technical field of the technique of experimental facilities and specifically relates to a spectrophotometer is related to.

Background

A spectrophotometer, also called a spectrometer, is a scientific instrument that decomposes light with complex components into spectral lines, which have different absorbances on light at specific wavelengths or within a certain wavelength range, and is used to perform qualitative or quantitative analysis on substances.

Referring to fig. 1 and 2, a conventional spectrophotometer includes a body 1, a measurement cavity 11 is formed in the body 1 for placing an object to be measured, and a cover 111 is disposed at the position of the measurement cavity 11 for closing the measurement cavity 11; a display screen 12 and a button 13 are arranged at one side of the measuring cavity 11 on the body 1 and used for displaying measured data and performing measuring operation; the optical detection device 2 and the signal amplifier 3 are arranged in the measuring cavity, the optical detection device 2 is connected with the signal amplifier 3, and the signal amplifier 3 is connected with the display screen 12; the measuring cavity 11 is internally provided with a colorimetric stand 4, and the colorimetric stand 4 is in sliding connection with the body 1 and is used for placing cuvettes filled with different samples; be provided with pull rod 5 on the color comparison frame 4, the one end of pull rod 5 is worn out to the body 1 outside.

When the spectrophotometer is used for detecting a sample, firstly, the measurement precision of the spectrophotometer is adjusted, different samples are respectively loaded into a plurality of different cuvettes, then the cuvettes are placed on a cuvette rack 4, the sample is detected through a light detection device 2, the tested data is transmitted to a display screen 12 through a signal amplifier 3, the tested data can be directly observed, and the cuvette rack 4 is driven to slide by pulling a pull rod 5 to detect different cuvettes; after a period of use, the sample in the cuvette may be carelessly scattered onto the color comparison rack 4, and the color comparison rack 4 needs to be cleaned to ensure the cleanness of the internal environment, so that the phenomenon that the sample is influenced by detection is reduced.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, one of the purposes of the utility model is to provide a spectrophotometer sets up through the mounting structure to the color comparison frame of inside, can dismantle by comparatively convenient contrast color frame, when cleaning it, relatively conveniently aligns and carries out cleaning operation.

The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme: a spectrophotometer comprises a body, wherein a measuring cavity is arranged on the body, a cover body used for sealing the measuring cavity is arranged at the opening position of the measuring cavity, and a colorimetric stand used for placing a cuvette containing a sample and an optical detection device used for detecting the sample are arranged in the measuring cavity; the body is provided with a display screen for displaying measurement data and a button for controlling detection; a signal amplifier is arranged between the display screen and the optical detection device, an installation block is arranged in the measurement cavity, and a T-shaped groove is arranged on the upper side surface of the installation block; sliding blocks are respectively arranged at the lower side edge positions of two opposite side surfaces of the colorimetric frame, the colorimetric frame is embedded in the T-shaped groove, and the colorimetric frame is in sliding connection with the mounting block; openings are respectively arranged on two sides of the T-shaped groove, the size of each opening is matched with that of the sliding block, and the sliding block is embedded into the T-shaped groove through the openings; be provided with the pull rod on the color comparison frame, the outside to the body is worn out to the one end of pull rod.

By adopting the technical scheme, when the spectrophotometer is used for detecting a sample, the sample is firstly split into a plurality of cuvettes, then the cuvettes are placed on the cuvette holder, the cover body is closed, the sample in one cuvette is detected through the light detection device, after the data recording is finished, the position of the inner cuvette holder is adjusted by pulling the pull rod, the sample in the other cuvette is detected at the utmost, the data is detected and recorded, when the cuvette holder needs to be cleaned, the pull rod is firstly detached from the cuvette holder, the cuvette holder is slid to the position of the sliding block corresponding to the opening, the cuvette holder is pulled out from the T-shaped groove and cleaned, and when the cuvette holder is mounted, the sliding block is aligned to the opening, and the cuvette holder is mounted in the T-shaped groove, so that the cuvette holder slides in the T-shaped groove; the color comparison rack can be conveniently disassembled and assembled only by aligning the sliding block with the opening, when the color comparison rack is required to be cleaned, the color comparison rack can be conveniently disassembled from the body, and when the color comparison rack is operated, long time is not required, so that the time is saved, and the operation is convenient.

The present invention may be further configured in a preferred embodiment as: the mounting block is provided with two sealing plates which are respectively arranged at the corresponding positions of the two openings and used for sealing the openings; the side walls of the sealing plate opposite to each other are respectively provided with an insertion strip, the two sides of the opening are provided with embedding grooves corresponding to the insertion strips, and the insertion strips are embedded in the corresponding embedding grooves; an accommodating groove is formed in the side surface of the inner side of the opening, a shielding plate is arranged on the sealing plate at a position corresponding to the accommodating groove, and the shielding plate is embedded in the corresponding accommodating groove; the upper side surface of the sealing plate is provided with a stop block.

By adopting the technical scheme, when the colorimetric stand is installed, the shielding plate is located in the accommodating groove, the two openings are in an unsealed state, the sliding block is aligned with the openings, the colorimetric stand is installed in the T-shaped groove, at the moment, the sealing plate is slid to pull the shielding plate out of the accommodating groove, the sealing plate seals the openings, the sliding block on the lower side is limited, when the colorimetric stand is pulled to move through the pull rod, the phenomenon that the colorimetric stand is far away from one side, connected with the pull rod, of the colorimetric stand and is tilted upwards can be reduced, and the stability of the colorimetric stand sliding in the T-shaped groove is guaranteed.

The present invention may be further configured in a preferred embodiment as: a plurality of reset springs are respectively arranged in the accommodating grooves, and two ends of each reset spring are respectively connected to the shielding plate and the groove bottom of the accommodating groove; when the return spring is in the original length state, the sealing plate is in a state of sealing the opening.

Through adopting above-mentioned technical scheme, when installing the color comparison frame in the T-slot, the board is sealed in the slip makes shielding plate embedding holding tank, compresses reset spring, installs the color comparison frame back in the T-slot, loosens and seals the board, under reset spring's effect, seals the board and seals the opening, can be comparatively convenient realization to open-ended closure, reduce appear forgetting to seal the opening and when appearing the pulling color comparison frame, the phenomenon of upwards perk appears in the tip of color comparison frame.

The present invention may be further configured in a preferred embodiment as: the mounting block is connected with the body in a sliding mode, and a lifting assembly used for driving the mounting block to lift is arranged between the body and the mounting block.

By adopting the technical scheme, when the color rack needs to be disassembled and assembled, the installation block is controlled by the lifting assembly to ascend to the opening position of the measurement cavity, so that the space is sufficient, and the disassembling and assembling operation on the color rack can be conveniently carried out.

The present invention may be further configured in a preferred embodiment as: the lifting assembly comprises a screw, a lifting motor, a first bevel gear and a second bevel gear; the position of the opening of the measuring cavity is provided with an installation plate, a screw rod is vertically arranged, the upper end and the lower end of the screw rod are respectively rotatably supported on the installation plate and the bottom surface of the measuring cavity, and the screw rod penetrates through the installation block and is in threaded fit with the installation block; the lifting motor is arranged on the bottom surface of the measuring cavity; the first bevel gear is fixed at the lower end of the screw; the second bevel gear is fixed on the output end of the lifting motor and is meshed with the first bevel gear; the mounting block is provided with a groove for accommodating the lifting motor, the first bevel gear and the second bevel gear.

Through adopting above-mentioned technical scheme, when needs control installation piece rises, through pressing the button, control elevator motor work drives the screw rod and rotates, drives the installation piece and goes up and down, and control that can be comparatively convenient goes up and down to the installation piece.

The present invention may be further configured in a preferred embodiment as: guide blocks are respectively arranged on the other three side surfaces except the side surface where the screw rod is arranged on the mounting block; the position department that corresponds with the guide block has seted up the guide way on the lateral wall of measuring the chamber in the body, and the wire inlays soon in the guide way that corresponds.

Through adopting above-mentioned technical scheme, when control installation piece goes up and down, through the guide block that sets up, can carry out comparatively stable injecing to the position of installation piece for the installation piece is guaranteed at the horizontality, can reduce the friction between installation piece and the body at the in-process that the installation piece goes up and down, makes the lift process of installation piece more will be stable and smooth.

The present invention may be further configured in a preferred embodiment as: a connecting block is arranged on the side surface of the colorimetric stand connected with the pull rod, and a threaded blind hole is formed in the connecting block; the end part of the pull rod is provided with threads, and the end part of the pull rod is inserted into the threaded blind hole and is in threaded connection with the connecting block; the end part of the pull rod positioned at the outer side of the body is provided with a holding disc.

Through adopting above-mentioned technical scheme, when needs are dismantled the color comparison frame, rotate the pulling, twist out its tip from the screw thread blind hole, extract it, later control installation piece rises, dismantles the color comparison frame from the installation piece, when being connected to the color comparison frame with the pull rod, passes the body with the pull rod, during its tip twists the screw thread blind hole, can be comparatively convenient dismantle the installation to the pull rod, it is comparatively convenient to operate.

The present invention may be further configured in a preferred embodiment as: the pull rod is provided with a limiting assembly used for moving the moving distance of the pull rod in advance, and the limiting assembly comprises a limiting column, a limiting spring and an adjusting sleeve; the side surface of the pull rod is provided with an installation groove, the limiting column is embedded in the installation groove and is in sliding connection with the pull rod, the side surface of the limiting column, which is far away from the pull rod, is provided with a plurality of limiting grooves, and the distance between every two adjacent limiting grooves is the same as the distance between every two adjacent cuvettes on the colorimetric stand; the limiting springs are arranged in the mounting grooves, and two ends of each limiting spring are respectively connected with the limiting columns and the bottoms of the mounting grooves; the position of the body corresponding to the limiting column is provided with a limiting sheet, the size of the limiting sheet is matched with that of the limiting groove, and when the spring is in an original length state, the limiting sheet is embedded in the limiting groove; the end part of the limiting column facing the holding disc is provided with an inclined plane, and the adjusting sleeve is sleeved on the pull rod and used for adjusting the position of the limiting column.

Through adopting above-mentioned technical scheme, when the pulling pull rod drives the color comparison frame and removes, at first with the reverse slip of adjusting sleeve to spacing post, extrude spacing post into the mounting groove, the pulling pull rod, make spacing piece butt position between the spacing groove on spacing post, slide adjusting sleeve to the direction of holding the dish this moment, continue to stimulate the pull rod, when the pull rod moves to the position department that spacing piece and spacing groove correspond, spacing piece imbeds in the spacing groove and fixes its position, can be comparatively accurate adjust the position of color comparison frame, in the in-process of carrying out the measurement, be difficult to appear touching the pull rod carelessly and make the phenomenon that the position of color comparison frame appears changing, the measuring process to the sample is more stable, be difficult to the mistake.

To sum up, the utility model discloses a following at least one useful technological effect:

1. by arranging the mounting structure of the contrast color frame, the mounting block can be conveniently controlled to ascend to the opening position of the measuring cavity under the condition that the contrast color frame needs to be cleaned, the dismounting and mounting of the contrast color frame can be conveniently completed, the time is saved when the contrast color frame is cleaned, and the operation is convenient;

2. through setting up the structure to the pull rod, when being connected to the color comparison frame with the pull rod on, can be comparatively convenient install pull rod and color comparison frame, through the spacing subassembly of society, drive the color comparison frame and slide and detect the time measuring to the sample in the different cell at the pulling pull rod, can comparatively convenient and accurate adjust the distance that the pull rod removed, the angle of adjustment is higher, reduces the phenomenon of error.

Drawings

FIG. 1 is a schematic diagram of a prior art spectrophotometer;

FIG. 2 is a schematic view showing an internal structure of a conventional spectrophotometer;

FIG. 3 is a schematic view showing the construction of a spectrophotometer according to the present embodiment;

FIG. 4 is a schematic view showing a connection structure of a color comparison rack and a mounting block;

FIG. 5 is a schematic view for showing the structure of a mounting block;

FIG. 6 is an enlarged schematic view of portion A of FIG. 5;

FIG. 7 is a schematic view of the lifting assembly shown;

FIG. 8 is an enlarged schematic view of portion B of FIG. 7;

FIG. 9 is a schematic view of the stop assembly;

fig. 10 is an enlarged schematic view of portion C of fig. 9.

In the figure, 1, a body; 11. a measurement cavity; 111. a cover body; 12. a display screen; 13. a button; 14. mounting a plate; 15. a switch; 16. a guide groove; 17. a limiting sheet; 2. a light detection device; 3. a signal amplifier; 4. a colorimetric stand; 41. a slider; 42. connecting blocks; 421. a threaded blind hole; 5. a pull rod; 51. holding the plate; 52. mounting grooves; 6. mounting blocks; 61. a T-shaped slot; 62. an opening; 63. a sealing plate; 631. a fillet; 632. a shielding plate; 633. a stopper; 64. caulking grooves; 65. accommodating grooves; 66. a return spring; 67. a groove; 68. a guide block; 7. a lifting assembly; 71. a screw; 72. a lifting motor; 73. a first bevel gear; 74. a second bevel gear; 8. a limiting component; 81. a limiting column; 811. a limiting groove; 82. a limiting spring; 83. and adjusting the sleeve.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 3 and 4, a spectrophotometer disclosed by the present invention comprises a body 1, a light detection device 2, a signal amplifier 3, a color comparison rack 4 and a pull rod 5; the body 1 is provided with a measuring cavity 11, and a cover body 111 is arranged at the position of the measuring cavity 11 and used for sealing the measuring cavity 11; the body 1 is provided with a display screen 12 and a button 13, the measured result is displayed through the display screen 12, and the button 13 is used for controlling the measurement of the sample; the light detection device 2 is arranged in the measurement cavity 11 and fixed on the side wall of the measurement cavity 11 for measuring a sample; the signal amplifier 3 is arranged in the measuring cavity 11 and is electrically connected with the light detection device 2, and the signal amplifier 3 is connected with a display; the colorimetric stand 4 is arranged in the measuring cavity 11 and is in sliding connection with the body 1; one end of the pull rod 5 is connected to the colorimetric stand 4, the other end of the pull rod penetrates out of the body 1, and the pull rod is in sliding connection with the body 1; sliding blocks 41 are respectively arranged at the lower side edge positions of the two opposite side surfaces of the color comparison rack 4; the measuring cavity 11 is internally provided with a mounting block 6 which is horizontally arranged at the bottom of the measuring cavity 11, the upper side surface of the mounting block 6 is provided with a T-shaped groove 61 along the length direction thereof, the width of the notch is smaller than that of the bottom of the groove, and the lower side of the color comparison rack 4 is embedded in the T-shaped groove 61; the two sides of the T-shaped groove 61 are respectively provided with an opening 62, and the size of the opening 62 is matched with the size of the sliding block 41.

When a sample is to be measured using this spectrophotometer, the sample is first dispensed into a plurality of cuvettes, the cuvettes are then placed on the cuvette holder 4, the lid 111 is closed, the sample in one cuvette is detected by the light detection device 2, and after the data recording is finished, the pull rod 5 is pulled, the position of the inner colorimetric frame 4 is adjusted, the sample in the other colorimetric vessel is detected completely, the data is measured and recorded, when the color comparison rack 4 needs to be cleaned, the pull rod 5 is firstly detached from the color comparison rack 4, the color comparison rack 4 is slid to the position where the slide block 41 is opposite to the opening 62, the color comparison rack 4 is pulled out from the T-shaped groove 61, the color rack 4 is cleaned and, when mounted, the slide block 41 is aligned with the opening 62 and the color rack 4 is mounted in the T-shaped groove 61 so that the color rack 4 slides in the T-shaped groove 61.

Through the arrangement, the color comparison frame 4 can be conveniently disassembled and assembled only by aligning the sliding block 41 with the opening 62, when the color comparison frame 4 needs to be cleaned, the color comparison frame 4 can be conveniently disassembled from the body 1, and when the color comparison frame is operated, long time is not needed, so that the time is saved, and the operation is convenient.

Referring to fig. 4 and 5, the mounting block 6 is provided with two sealing plates 63, and the two sealing plates 63 are respectively arranged at corresponding positions of the two openings 62 on the mounting block 6 to seal the two openings 62; the sealing plate 63 is provided with a fillet 631 on the opposite side wall, the two sides of the opening 62 are respectively provided with a caulking groove 64 corresponding to the fillet 631, the fillets 631 are respectively embedded in the corresponding caulking grooves 64, and the sealing plate 63 is in sliding connection with the mounting block 6; the side surface of the inner side of the opening 62 is provided with an accommodating groove 65, the sealing plate 63 is provided with a shielding plate 632 at a position corresponding to the accommodating groove 65, and the shielding plate 632 is embedded in the accommodating groove 65; stoppers 633 are provided on the upper side surfaces of the sealing plates 63.

When the colorimetric stand 4 is mounted, the shielding plate 632 is located in the accommodating groove 65, the two openings 62 are in an unclosed state, the sliding block 41 is aligned with the openings 62, the colorimetric stand 4 is mounted in the T-shaped groove 61, at this time, the sealing plate 63 is slid, the shielding plate 632 is pulled out of the accommodating groove 65, the sealing plate 63 seals the openings 62, the sliding block 41 on the lower side is limited, when the colorimetric stand 4 is pulled by the pull rod 5 to move, the phenomenon that the side, away from the colorimetric stand 4, connected with the pull rod 5 is tilted upwards can be reduced, and the stability of the colorimetric slide in the T-shaped groove 61 is ensured.

Referring to fig. 5 and 6, two return springs 66 are respectively disposed in the accommodating groove 65, both ends of each return spring are respectively fixedly connected to the shielding plate 632 and the groove bottom of the accommodating groove 65, and the sealing plate 63 is in a state of closing the opening 62 when the springs are in an original length state; when installing color comparison frame 4 in T-slot 61, the slip is sealed the board 63 and is makeed shielding plate 632 to imbed in the holding tank 65, compress reset spring 66, install color comparison frame 4 back in T-slot 61, loosen and seal board 63, under reset spring 66's effect, seal board 63 seals opening 62, can be comparatively convenient the realization to opening 62's closure, reduce appear forgetting to seal opening 62 and appear when pulling color comparison frame 4, the phenomenon of upwards perk appears in the tip of color comparison frame 4.

When the color rack 4 is disassembled, it can be seen that the size of the measuring cavity 11 is smaller, and the operation on the color rack 4 is more difficult, so that, referring to fig. 7 and 8, the utility model is provided with the mounting block 6 which is in sliding connection with the body 1, and the mounting block 6 can be lifted in the vertical direction; be provided with lifting unit 7 in the body 1, lifting unit 7 is connected with installation piece 6 for drive installation piece 6 slides on vertical direction.

Through the arrangement, when the color rack 4 needs to be disassembled and assembled, the lifting assembly 7 controls the installation block 6 to ascend to the position of the opening 62 of the measurement cavity 11, so that the space is sufficient, and the operation of disassembling and assembling the color rack 4 can be conveniently carried out.

Referring to fig. 7 and 8, the lifting assembly 7 includes a screw 71, a lifting motor 72, a first bevel gear 73 and a second bevel gear 74; a mounting plate 14 is arranged on the side surface of the opening 62 of the measuring cavity 11, a screw rod 71 is vertically arranged, the upper end and the lower end of the screw rod are respectively rotatably supported on the mounting plate 14 and the bottom surface of the measuring cavity 11, and the screw rod 71 penetrates through the mounting block 6 and is in threaded fit with the mounting block 6; the lifting motor 72 is arranged on the bottom surface of the measurement cavity 11; a first bevel gear 73 is fixed to the lower end of the screw 71, and rotates synchronously with the screw 71; a second bevel gear 74 is fixed on the output shaft of the elevating motor 72 and is engaged with the first bevel gear 73; the mounting block 6 is provided with corresponding grooves 67 at positions corresponding to the lifting motor 72, the first bevel gear 73 and the second bevel gear 74; the switch 15 for controlling the lifting motor 72 is arranged on the side wall of the body 1.

When the installation block 6 needs to be controlled to ascend, the lifting motor 72 is controlled to work by pressing the button 13, the screw rod 71 is driven to rotate, the installation block 6 is driven to ascend and descend, and the installation block 6 can be controlled to ascend and descend conveniently.

Referring to fig. 7, the mounting block 6 is provided with guide blocks 68 on three sides except the side where the screw 71 is located; the side wall of the measurement cavity 11 in the body 1 is provided with guide grooves 16 at positions corresponding to the guide blocks 68, the guide blocks 68 are respectively embedded in the corresponding guide grooves 16, and the guide blocks 68 are in sliding connection with the body 1; when control installation piece 6 goes up and down, through the guide block 68 that sets up, can carry out comparatively stable injecing to the position of installation piece 6 for installation piece 6 guarantees at the horizontality, can reduce the friction between installation piece 6 and the body 1 at the in-process that installation piece 6 goes up and down, makes the lift process of installation piece 6 more will be stable and smooth.

Referring to fig. 9, a connecting block 42 is arranged at the middle position on one side surface of the color comparison rack 4 connected with the pull rod 5, and a threaded blind hole 421 is formed at the middle position on the connecting block 42; the end of the pull rod 5 is provided with a thread which is matched with the thread blind hole 421; the end part of the pull rod 5 positioned at the outer side of the body 1 is fixedly connected with a holding disc 51; when needs are dismantled color comparison frame 4 and are got off, rotate the pulling, twist out its tip from screw thread blind hole 421, extract it, later control installation piece 6 rises, dismantle color comparison frame 4 from installation piece 6, when being connected to color comparison frame 4 with pull rod 5, pass body 1 with pull rod 5, during screw thread blind hole 421 is twisted to its tip, can be comparatively convenient dismantle the installation to pull rod 5, it is comparatively convenient to operate.

Referring to fig. 9 and 10, a limiting component 8 is arranged on a side surface of the pull rod 5 to limit a sliding distance of the pull rod 5 pulling the color comparison rack 4, and includes a limiting column 81, a limiting spring 82 and an adjusting sleeve 83; the side surface of the pull rod 5 is provided with an installation groove 52, the limiting column 81 is arranged in the installation groove 52 and is in sliding connection with the pull rod 5, the side surface of the limiting column 81, which is back to the pull rod 5, is provided with a plurality of limiting grooves 811, and the distance between every two adjacent cuvettes on the colorimetric stand 4 is the same as the distance between every two adjacent cuvettes on the colorimetric stand 4; a plurality of limiting springs 82 are arranged in the mounting groove 52, and two ends of each limiting spring are fixedly connected to the limiting column 81 and the groove bottom of the mounting groove 52 respectively; a position corresponding to the limiting column 81 on the body 1 is provided with a limiting sheet 17, the size of the limiting sheet 17 corresponds to that of the limiting groove 811, and the limiting sheet 17 is embedded into the corresponding limiting groove 811 to fix the position of the pull rod 5; the one end that spacing post 81 is located the body 1 outside sets up to the inclined plane, and the adjustment sleeve 83 cover is established on pull rod 5, is located between spacing post 81 and the holding disc 51, and the internal diameter of adjustment sleeve 83 and the diameter adaptation of pull rod 5 will adjust sleeve 83 to the direction slip at spacing post 81 place, and its and the inclined plane cooperation of spacing post 81 will spacing post 81 extrude in to mounting groove 52 for spacing post 81 is located in mounting groove 52.

When the pull rod 5 is pulled to drive the color comparison rack 4 to move, firstly, the adjusting sleeve 83 slides in the reverse direction of the limiting column 81, the limiting column 81 is extruded into the installation groove 52, the pull rod 5 is pulled to enable the limiting sheet 17 to abut against the position between the limiting grooves 811 on the limiting column 81, at the moment, the adjusting sleeve 83 slides in the direction of the holding disc 51, the pull rod 5 is continuously pulled, when the pull rod 5 moves to the position where the limiting sheet 17 corresponds to the limiting grooves 811, the limiting sheet 17 is embedded into the limiting grooves 811 to fix the position of the limiting sheet, the position of the color comparison rack 4 can be accurately adjusted, the phenomenon that the position of the color comparison rack 4 is changed due to careless touch of the pull rod 5 in the measurement process is not easy to occur, the measurement process of a sample is more stable, and errors are not easy to occur.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. A spectrophotometer comprises a body (1), wherein a measuring cavity (11) is arranged on the body (1), a cover body used for sealing the measuring cavity (11) is arranged at the position of an opening (62) of the measuring cavity (11), a colorimetric stand (4) used for placing a cuvette filled with a sample and a light detection device (2) used for detecting the sample are arranged in the measuring cavity (11); the body (1) is provided with a display screen (12) for displaying measurement data and a button (13) for controlling detection; be provided with signal amplifier (3) between display screen (12) and light detection device (2), its characterized in that: a mounting block (6) is arranged in the measuring cavity (11), and a T-shaped groove (61) is arranged on the upper side surface of the mounting block (6); sliding blocks (41) are respectively arranged at the lower side edge positions of two opposite side surfaces of the colorimetric frame (4), the colorimetric frame (4) is embedded in the T-shaped groove (61), and the colorimetric frame is in sliding connection with the mounting block (6); openings (62) are respectively arranged on two sides of the T-shaped groove (61), the size of each opening (62) is matched with that of the sliding block (41), and the sliding block (41) is embedded into the T-shaped groove (61) through the openings (62); be provided with pull rod (5) on color comparison frame (4), the outside to body (1) is worn out to the one end of pull rod (5).

2. A spectrophotometer as claimed in claim 1, wherein: the mounting block (6) is provided with two sealing plates (63), and the two sealing plates (63) are respectively arranged at the corresponding positions of the two openings (62) and used for sealing the openings (62); the opposite side walls of the sealing plate (63) are respectively provided with a fillet (631), the two sides of the opening (62) are provided with embedding grooves (64) corresponding to the fillets (631), and the fillets (631) are embedded in the corresponding embedding grooves (64); an accommodating groove (65) is formed in the side surface of the inner side of the opening (62), a shielding plate (632) is arranged on the sealing plate (63) at a position corresponding to the accommodating groove (65), and the shielding plate (632) is embedded in the corresponding accommodating groove (65); a stopper (633) is arranged on the upper side surface of the sealing plate (63).

3. A spectrophotometer according to claim 2, wherein: a plurality of return springs (66) are respectively arranged in the accommodating grooves (65), and two ends of each return spring (66) are respectively connected to the shielding plate (632) and the groove bottom of the accommodating groove (65); when the return spring (66) is in the original length state, the sealing plate (63) is in a state of closing the opening (62).

4. A spectrophotometer as claimed in claim 3, wherein: the mounting block (6) is in sliding connection with the body (1), and a lifting assembly (7) used for driving the mounting block (6) to lift is arranged between the body (1) and the mounting block (6).

5. A spectrophotometer according to claim 4, wherein: the lifting assembly (7) comprises a screw (71), a lifting motor (72), a first bevel gear (73) and a second bevel gear (74); a mounting plate (14) is arranged at the position of an opening (62) of the measuring cavity (11), a screw rod (71) is vertically arranged, the upper end and the lower end of the screw rod are respectively rotatably supported on the mounting plate (14) and the bottom surface of the measuring cavity (11), and the screw rod (71) penetrates through the mounting block (6) and is in threaded fit with the mounting block (6); the lifting motor (72) is arranged on the bottom surface of the measuring cavity (11); a first bevel gear (73) is fixed at the lower end of the screw rod (71); the second bevel gear (74) is fixed on the output end of the lifting motor (72) and is meshed with the first bevel gear (73); the mounting block (6) is provided with a groove (67) for accommodating the lifting motor (72), the first bevel gear (73) and the second bevel gear (74).

6. A spectrophotometer according to claim 5, wherein: guide blocks (68) are respectively arranged on the other three side surfaces of the mounting block (6) except the side surface where the screw rod (71) is located; the side wall of the measuring cavity (11) in the body (1) is provided with a guide groove (16) at a position corresponding to the guide block (68), and the wire is quickly embedded in the corresponding guide groove (16).

7. A spectrophotometer as claimed in claim 1, wherein: a connecting block (42) is arranged on the side surface of the colorimetric stand (4) connected with the pull rod (5), and a threaded blind hole (421) is arranged on the connecting block (42); the end part of the pull rod (5) is provided with threads, and the end part of the pull rod (5) is inserted into the threaded blind hole (421) and is in threaded connection with the connecting block (42); the end part of the pull rod (5) positioned at the outer side of the body (1) is provided with a holding disc (51).

8. A spectrophotometer as claimed in claim 7, wherein: the pull rod (5) is provided with a limiting component (8) used for moving the moving distance of the pull rod (5) in advance, and the limiting component comprises a limiting column (81), a limiting spring (82) and an adjusting sleeve (83); the side surface of the pull rod (5) is provided with an installation groove (52), the limiting column (81) is embedded in the installation groove (52) and is in sliding connection with the pull rod (5), the side surface of the limiting column (81) departing from the pull rod (5) is provided with a plurality of limiting grooves (811), and the distance between every two adjacent limiting grooves (811) is the same as the distance between every two adjacent cuvettes on the colorimetric stand (4); a plurality of limiting springs (82) are arranged in the mounting groove (52), and two ends of the limiting springs are respectively connected with the limiting column (81) and the bottom of the mounting groove (52); a position, corresponding to the limiting column (81), on the body (1) is provided with a limiting sheet (17), the size of the limiting sheet is matched with that of the limiting groove (811), and when the spring is in an original length state, the limiting sheet (17) is embedded in the limiting groove (811); the end part of the limiting column (81) facing the holding disc (51) is provided with an inclined surface, and the adjusting sleeve (83) is sleeved on the pull rod (5) and used for adjusting the position of the limiting column (81).