CN219084496U

CN219084496U - Sampling device

Info

Publication number: CN219084496U
Application number: CN202223594584.9U
Authority: CN
Inventors: 邢宽; 张鹏; 谢珍; 何贵伦; 余同
Original assignee: Nanjing Experimental Medicine Examines Co ltd
Current assignee: Nanjing Experimental Medicine Examines Co ltd
Priority date: 2022-12-30
Filing date: 2022-12-30
Publication date: 2023-05-26
Anticipated expiration: 2032-12-30

Abstract

The utility model discloses a sampler, which comprises a sampling head and an absorbing mechanism for controlling the absorption of the sampling head, wherein the sampling head is arranged on the absorbing mechanism, and the absorbing mechanism is also provided with a quantifying mechanism for controlling the absorbing quantity of the sampling head and a sealing mechanism for sealing the sampled sampling head, and the sealing mechanism extends and contracts axially relative to the absorbing mechanism. The advantage utilizes ration mechanism to make the sampler can be according to setting for, quantitative sampling, and the sealing mechanism who sets up simultaneously in the suction means can seal the sampler after the sample, effectively prevents the test medicament of sampler suction from dripping in the sampler, simple structure, and it is more convenient to use.

Description

Sampling device

Technical Field

The utility model particularly relates to a sampler.

Background

The sampler is also called a pipette and a pipette, is a commonly used pipetting device in a laboratory, in which laboratory test reagents are generally stored in test tubes, and in the process of experiments, the test reagents are often required to be sampled, liquid reagents in each test tube are sampled and dripped into corresponding liquid reagent experiment reaction tanks for experiments and observation of reaction conditions, the existing sampler stores the test reagents in the sampler after sampling, due to the problem of tightness, the existing sampler has the condition of leaking the test reagents from the sampling ports, and some of the existing samplers cannot realize quantitative sampling.

In chinese patent: 202222138205.9, entitled, a pipette, comprising, a pipette body comprising a housing and a connector assembly provided at one end of the housing; the connector assembly is provided with an opening, and the connector assembly extends out of the opening, and a mounting cavity is formed between the connector assembly and the housing; the clamping assembly is matched with the mounting cavity at one end, the other end of the clamping assembly is sleeved with the test tube, and the inner wall of the clamping assembly clamps the test tube to the joint assembly.

As shown in fig. 1 of patent 202222138205.9, the test tube is first introduced into the mounting cavity, the sealing member is sleeved in the test tube, the clamping assembly is sleeved on the test tube, and the first clamping member pushes the sealing member into the mounting cavity and simultaneously is inserted into the mounting cavity. The sealing element is positioned at one end of the first clamping element, which is far away from the second clamping element, and is connected with one side of the mounting cavity, which is far away from the second joint. The sealing member inner circle and the first joint interference fit, sealing member outer lane and installation cavity interference fit to promote the leakproofness, avoid liquid to take place the whereabouts after imbibition, the whole more complicated inconvenient use of structure.

Disclosure of Invention

The utility model aims to solve the technical problems that the existing sampler mentioned in the technical background is poor in tightness, drops exist after liquid is sucked, and the existing sampler is troublesome to quantitatively sample and use.

Aiming at the technical problems, a sampler is provided; the method is realized by the following technical scheme: the utility model provides a sampler, includes the suction means that the sampling head and control sampling head absorbed, the sampling head sets up on suction means, still is provided with the quantitative mechanism that control sampling head absorbed quantity and carries out sealed sealing mechanism to the sampling head after the sample on suction means, sealing mechanism stretches out and contracts along the axial for suction means.

According to the utility model, the quantitative mechanism is utilized to enable the sampler to quantitatively sample according to the setting, and the sealing mechanism arranged in the suction mechanism can seal the sampled sampler, so that the test medicament sucked by the sampler is effectively prevented from dripping from the sampler, and the sampler is simple in structure and more convenient to use.

According to the technical scheme, the suction mechanism comprises a suction pipe and a piston rod inserted into the suction pipe, one end of the suction pipe is detachably connected with the sampling head, and the sampling head is detachably arranged so that the service life of the sampler can be prolonged by replacing the damaged sampling head.

The quantitative mechanism comprises an inner cylinder and an outer cylinder sleeved outside the inner cylinder, the outer cylinder rotates relative to the inner cylinder along the axial direction, and the arrangement of the outer cylinder enables the sampling amount of the sampler to be adjusted by rotating the outer cylinder, so that the quantitative mechanism is more convenient to use.

According to the technical scheme, the outer surface of the inner cylinder is provided with a plurality of scale values for marking the sampling amount along the length direction of the inner cylinder in a spiral manner, and the setting of the scale values on the inner cylinder enables the sampling amount of the sampler to be set through the scale values on the inner cylinder, so that quantitative sampling is facilitated.

According to the technical scheme, the outer cylinder is provided with the observation port for checking the scales on the inner cylinder, and the quantitative value of the sampler can be checked through the observation port by arranging the observation port, so that the use is more convenient.

The sealing mechanism comprises a sealing head and a connecting rod, wherein the sealing head is arranged at one end of the connecting rod, the connecting rod is inserted into the piston rod, the connecting rod can extend and retract relative to the piston rod, the connecting rod can be arranged in a telescopic way relative to the piston rod, the medicine inlet of the sampler can be plugged by pressing the connecting rod, and experimental reagents are effectively prevented from dripping from the sampler.

According to the technical scheme, the sampling head is made of transparent glass, the scale marks are printed on the sampling head, and the arrangement of the scale marks printed on the sampling head enables the suction quantity determined by the scale and the quantitative mechanism on the sampling head to be compared, so that incorrect operation is prevented from being measured.

Compared with the prior art, the utility model has the following beneficial effects:

according to the technical scheme, the quantitative mechanism is utilized to enable the sampler to quantitatively sample according to the setting, and the sealing mechanism arranged in the suction mechanism can seal the sampled sampler, so that the test medicament sucked by the sampler is effectively prevented from dripping from the sampler, the structure is simple, and the use is more convenient.

Drawings

Fig. 1 is a schematic perspective view of the present utility model.

Fig. 2 is a partial cross-sectional view of the utility model except for a sampling head.

Fig. 3 is a schematic perspective view of the suction mechanism.

Fig. 4 is a schematic perspective view of the inner barrel.

Fig. 5 is an exploded view of the present utility model.

Detailed Description

The following describes the technical solution in the embodiment of the present utility model in detail with reference to fig. 1 to 5 in the embodiment of the present utility model.

Example 1

As shown in fig. 1 and 5, a sampler includes a sampling head 1, a suction mechanism 2, a dosing mechanism 3, and a sealing mechanism 4.

As shown in fig. 1 and 5, the sampling head 1 is a hollow glass tube with two open ends made of transparent glass, one end of the sampling head 1 is conical and can be inserted into a test tube for sampling, the other end of the sampling head 1 is sleeved at a sampling head interface 23 on a suction tube 21 in the suction mechanism 2, the sampling head 1 is sleeved on the sampling head interface 23 very firmly, and the situation that the sampling head 1 falls off in a non-artificial state and air leakage can not occur at the joint of the sampling head and the sampling head.

In order to prevent mishandling and taking errors, scale marks for marking the sampling volume of the sampling head 1 are uniformly printed on the outer wall of the sampling head 1 and perpendicular to the side wall of the sampling head 1.

As shown in fig. 2, 3 and 5, the suction means 2 mainly comprises a suction tube 21 and a piston rod 22 inserted into the suction tube 21, the suction tube 21 is integrally made of PP plastic by injection molding, one end of the suction tube 21 is completely opened, the other end is closed, but a sampling head interface 23 for connecting with the sampling head 1 is left at the closed end, a through hole for communicating with the suction tube 21 is formed on the sampling head interface 23, a partition plate for dividing the suction tube 21 into two chambers is provided in the middle of the suction tube 21, the suction tube 21 is divided into a storage chamber 24 and a suction chamber 25 by the partition plate, and a circular through hole penetrating the two chambers is formed on the partition plate for facilitating the suction of the test agent, and the sealing head 41 can penetrate the through hole on the partition plate.

For ease of installation, an external thread for installation is provided on the outer wall of the open end of the suction pipe 21.

The piston rod 22 is inserted into the suction cavity 25 in the suction pipe 21 through one end of the opening of the suction pipe 21, and in order to prevent air leakage, the piston on the piston rod 22 is tightly attached to the inner wall of the suction cavity 25, the piston rod 22 is a cylindrical straight rod, in order to prevent falling in the pulling process, the piston is a sealing plug made of elastic rubber, in order to be convenient to use, a first reset spring 26 is fixed on a partition plate in the suction pipe 21, one end of the first reset spring 26 is placed on the partition plate, one end of the first reset spring is abutted against the piston on the piston rod 22, the first reset spring 26 is compressed when the piston rod 22 is pressed, and after the piston rod 22 is loosened, the piston rod 22 is reset and ascends under the action of the first reset spring, so that the suction is sucked into the sampling head 1.

In order to facilitate the installation of the sealing mechanism 4, a circular through hole penetrating the piston rod 22 and the piston is formed in the piston rod 22 in the axial direction of the piston rod 22 perpendicular to the radial direction of the piston rod 22, and the connecting rod 42 of the sealing mechanism 4 is inserted into the circular through hole.

The sealing mechanism 4 comprises a sealing head 41 and a connecting rod 42, wherein the sealing head 41 is a conical soft plug head made of rubber, one end of the sealing head 41 is fixed at one end of the connecting rod 42 through glue, the connecting rod 42 is a cylindrical plastic rod, and the connecting rod 42 is inserted into the piston rod 22.

In order to facilitate the use of the sealing mechanism 4, a circular limit boss 43 is fixed to the connecting rod 42 at a port of one end of the piston rod 22, perpendicular to the side surface of the connecting rod 22, and protrudes radially outwards along the connecting rod 22, a second return spring 44 is sleeved outside the sealing head 41, one end of the second return spring 44 is in contact with the partition plate, and the other end of the second return spring is abutted against the limit boss 43.

To distinguish between pressing the piston rod 22 and the connecting rod 42, one end of the connecting rod 42 extends beyond one end of the piston rod 22.

As shown in fig. 2, 4 and 5, the dosing mechanism 3 comprises an inner cylinder 31 and an outer cylinder 32 sleeved outside the inner cylinder 31, the inner cylinder 31 is a cylindrical plastic pipe, one end of the inner cylinder 31 is provided with an internal thread, the inner cylinder 31 and the suction pipe 21 are screwed together through the internal thread, an annular boss is arranged at the position, which is 5mm away from a port, of the outer surface of the other end of the inner cylinder 31 and is perpendicular to the outer surface of the inner cylinder 31, the annular boss is 2mm higher than the outer surface of the inner cylinder 31, the inner cylinder 31 and the pressing cover 27 are sleeved together through the annular boss, and the inner cylinder 31 and the pressing cover 27 are made of PP plastic with certain elasticity and toughness for convenience in installation and fixation.

A section of spiral groove 34 is concavely formed on the outer surface of the inner cylinder 31 and perpendicular to the outer wall of the inner cylinder 31 along the length direction of the inner cylinder 31, two ends of the spiral groove 34 are arranged on the axial direction of the inner cylinder 31, the distance from the two ends of the inner cylinder 31 is 5mm respectively, and the section shape of the spiral groove 34 is semicircular; meanwhile, a plurality of scale values for identifying the sampling amount are uniformly printed on the outer surface of the inner cylinder 31 and are perpendicular to the outer wall of the inner cylinder 31 along the length direction of the inner cylinder 31 in a spiral manner.

The outer cylinder 32 is a hollow plastic tube with two open ends, the outer cylinder 32 is sleeved outside the inner cylinder 31, the inner diameter of the outer cylinder 32 is equal to the outer diameter of the inner cylinder 31, and in order to facilitate quantitative sampling, a section of spiral boss is protruded on the inner wall of the outer cylinder 32 along the length direction of the outer cylinder 31 perpendicular to the inner wall of the outer cylinder 32, and the spiral boss and the spiral groove 34 can be tightly matched together.

After the outer cylinder 32 is sleeved on the inner cylinder 31, in order to facilitate checking of scale values on the inner cylinder 31, a rectangular observation opening 33 is formed on the surface of one end of the outer cylinder 32 and perpendicular to the surface of the outer cylinder 32, the observation opening 33 penetrates through one side of the outer cylinder 32, an indication arrow is marked in the middle of the observation opening 33, and the indication arrow can be marked by printing or by adding an indication arrow on the observation opening 33 during production injection molding.

In order to facilitate the sampling of the pressing piston rod 22, a pressing cover 27 is sleeved outside the inner barrel 31, the pressing cover 27 is a cylindrical plastic cover with one end open, a boss which is matched and clamped with the annular boss on the inner barrel 31 is arranged on the inner wall of the pressing cover 27 and perpendicular to the side wall of the pressing cover 27, the pressing cover 27 is sleeved outside the inner barrel 31, the pressing end of the piston rod 22 is in contact with the top wall of the pressing cover 27, and the pressing cover 27 can drive the piston rod 22 to move.

In order to facilitate the use of the connecting rod 42 on the sealing mechanism 4, a circular through hole penetrating the end face of the pressing cover 27 is formed at the end closed by the pressing cover 27 and perpendicular to the end face of the pressing cover 27, and the connecting rod 42 is inserted into the circular through hole and leaks out a certain distance.

In order to facilitate the pressing, the pressing to the link 42 is prevented at the time of sampling, and a pressing plate 28 is provided perpendicularly to the pressing cover 27 at the side of the pressing cover 27.

In order to prevent the connecting rod 42 from being pressed downwards, the sealing head 41 blocks the sampling head interface 23 of the suction pipe 21, when the extruding part of the experimental medicament influences the sampling precision, the quantitative value of the quantitative mechanism 3 of the sampler is set to be larger, the extruding amount of the sealing head 41 is reserved, and the accuracy of the sampling amount is ensured.

The use process of the embodiment is as follows: when the sample is needed, the outer cylinder 32 is rotated firstly, the needed sample value is determined through the outer cylinder 32, after setting, the pressing plate 28 on the pressing cover 27 is pressed, at this time, the pressing cover 27 and the piston rod 22 move downwards until the ports of the pressing cover 27 and the outer cylinder 32 are contacted until the pressing is not pressed, then the sampling head 1 is inserted into the liquid to be sampled, the pressing plate 28 is loosened, at this time, the piston rod 22 is reset under the action of the first reset spring 26, then the experimental medicament is sucked into the sampling head 1, even into the storage cavity 24, after the suction is finished, the connecting rod 42 leaked out of the pressing cover 27 is pressed, at this time, the sealing head 41 passes through the through hole on the partition plate under the action of the connecting rod 42, the sealing is finished in the sampling head interface 23, the liquid in the sampler is placed, the sampling is dripped, the sampling is finished, at this time, when the experimental medicament is needed to be extruded, the hand pressing the connecting rod 42 is firstly loosened, at this time, the sealing head 41 is reset under the action of the second reset spring 44, the sampling head interface 23 is not blocked, then the pressing plate 28 is pressed, the connecting rod 27 and the piston rod 22 moves downwards, the experimental medicament is extruded into the designated position in the storage cavity 24 and the experimental medicament is extruded.

The above embodiments are only for illustrating the technical idea of the present utility model, and the protection scope of the present utility model is not limited thereto, and any modification made on the basis of the technical scheme according to the technical idea of the present utility model falls within the protection scope of the present utility model.

Claims

1. A sampler, characterized in that: the device comprises a sampling head (1) and a suction mechanism (2) for controlling the suction of the sampling head (1), wherein the sampling head (1) is arranged on the suction mechanism (2), a quantitative mechanism (3) for controlling the suction quantity of the sampling head (1) and a sealing mechanism (4) for sealing the sampled sampling head (1) are further arranged on the suction mechanism (2), and the sealing mechanism (4) extends out and contracts along the axial direction relative to the suction mechanism (2).

2. A sampler according to claim 1, wherein: the suction mechanism (2) comprises a suction pipe (21) and a piston rod (22) inserted into the suction pipe (21), and one end of the suction pipe (21) is detachably connected with the sampling head (1).

3. A sampler according to claim 1, wherein: the dosing mechanism (3) comprises an inner cylinder (31) and an outer cylinder (32) sleeved outside the inner cylinder (31), wherein the outer cylinder (32) rotates relative to the inner cylinder (31) along the axial direction.

4. A sampler according to claim 3, wherein: the outer surface of the inner cylinder (31) is perpendicular to the inner cylinder (31), and a plurality of scale values for marking the sampling amount are spirally arranged along the length direction of the inner cylinder (31).

5. A sampler according to claim 4, wherein: an observation port (33) for observing scales on the inner cylinder (31) is arranged on the outer cylinder (32).

6. A sampler according to claim 1, wherein: the sealing mechanism (4) comprises a sealing head (41) and a connecting rod (42), the sealing head (41) is arranged at one end of the connecting rod (42), the connecting rod (42) is inserted into the piston rod (22), and the connecting rod (42) can extend and retract relative to the piston rod (22).

7. A sampler according to claim 1, wherein: the sampling head (1) is made of transparent glass, and scale marks are printed on the sampling head (1).