CN219038522U - Sampling needle and blood cell analyzer - Google Patents

Abstract

The utility model discloses a sampling needle and a blood cell analyzer, the sampling needle comprises a needle head and a tube body which are connected with each other, the tube body is provided with a sample suction port, a sampling channel is arranged in the tube body, the sampling channel is communicated with the sample suction port, a deflation groove extending along the length direction of the tube body is formed on the outer side of the tube body, on the cross section vertical to the length direction of the tube body, the width of the deflation groove is gradually expanded from the outer side of the tube body to one side of the sampling channel, the needle head is used for inserting a test tube cap, the deflation groove is used for decompressing a test tube, the needle head of the sampling needle is inserted into the test tube cap of the test tube until the deflation groove enters the interior of the test tube, the gas in the test tube is discharged out of the test tube through the deflation groove due to positive pressure in the test tube, and after the needle head is inserted into the test tube, the deflation groove of the sampling needle cuts the test tube cap to form chips, the width of the deflation groove is designed to be gradually expanded along the direction vertical to the length direction of the tube body, and most of the chips are blocked by the outer wall of the opening of the deflation groove.

Description

Sampling needle and blood cell analyzer

Technical Field

The utility model relates to the technical field of sample analysis, in particular to a sampling needle and a blood cell analyzer.

Background

Blood cell analyzer, blood cell counter, etc. is one of the very wide instruments for clinical examination in hospitals, and along with the development of computer technology in recent years, the blood cell analysis technology is also changed from three-group to five-group, from two-dimensional space to three-dimensional space, and we also note that the five classification technologies of modern blood cell analyzers are the same as the current very advanced flow cytometry, such as scattered light detection technology, sheath flow technology, laser technology, etc. The focus of this document is on the detection method of penta-clustered blood cell analysis instrument and its application

At present, the technology of a full-automatic blood cell analyzer on the market needs to sample and analyze blood in a test tube by using sampling, and a sampling needle needs to have a deflation function because the sampling needle needs to puncture a test tube cap to enter the test tube to absorb the sample, positive pressure is universally present in a sealed space in the test tube, and the pressure can greatly influence the accuracy of sampling.

The existing deflation schemes mainly have two kinds, firstly, the deflation is carried out through a deflation channel, and the sample suction channel and the deflation channel are integrated on the sampling needle; the method has complex processing technology and higher sampling needle cost. Secondly, a gas discharging groove is added on the circumference of the outer wall of the sampling needle; according to the method, as the sampling needle needs to puncture the test tube cap to enter the test tube to absorb a sample, the test tube cap is easier to cut to form fragments after the air discharge groove is formed in the outer wall of the sampling needle, and even fine fragments can enter the air discharge groove, the risk of blocking a pipeline and affecting performance exists after the fragments of the test tube cap follow the sampling needle to enter the instrument.

In view of this, there is a need to provide a new sampling needle and blood cell analyzer that addresses or at least alleviates the above-mentioned technical drawbacks.

Disclosure of Invention

The utility model mainly aims to provide a sampling needle and a blood cell analyzer, and aims to solve the technical problems that the cost of an existing sampling needle integrated with a sample sucking and air discharging channel is too high and chips of a test tube cap easily enter an air discharging groove.

In order to achieve the above object, the present utility model provides a sampling needle comprising: including interconnect's syringe needle and body, the body is provided with inhales the appearance mouth, the inside sampling channel that is provided with of body, sampling channel with inhale appearance mouth intercommunication, the body outside still is formed with the gassing groove that extends along body length direction, on the perpendicular to body length direction's cross section, the width of gassing groove is from body outside side sampling channel's one side is the divergent setting, the syringe needle is used for inserting the test tube cap, the gassing groove is used for carrying out the pressure release to the test tube.

In an embodiment, the tube body comprises a suction section, a transition section and a needle body section which are sequentially connected, the sample suction port is arranged in the suction section, and the air release groove extends from the transition section to the needle body section.

In an embodiment, the one end of the air vent groove, which is close to the sample suction port, is provided with a smooth section, the air vent groove comprises a bottom surface and side surfaces which are arranged on the bottom surface at intervals, an arc chamfer is formed at the joint of the bottom surface and the side surfaces, and a round angle is formed at one side of the side surfaces, which is far away from the bottom surface.

In an embodiment, the number of the air discharging grooves is at least one, the pipe body is a circular pipe, and the air discharging grooves are arranged on the outer wall of the circular pipe.

In an embodiment, the number of the air discharging grooves is at least two, and the air discharging grooves are uniformly distributed at intervals along the circumferential direction of the circular tube.

In one embodiment, the included angle between the bottom surface and the side surface of the air discharge groove ranges from 20 degrees to 85 degrees.

In one embodiment, the top opening size of the air vent groove is 0.1 mm-0.5 mm, the bottom opening size of the air vent groove is 0.2 mm-1 mm, and the depth size of the air vent groove is 0.1 mm-0.5 mm.

In one embodiment, the length dimension of the air bleed slot is 40 mm-90 mm.

The utility model also provides a blood cell analyzer, which comprises the body and the sampling needle, wherein the sampling needle is arranged on the body.

In an embodiment, the body is provided with the position of placing, the position of placing is used for placing the test tube, the sampling needle still includes the needle tail section, the one end of needle tail section with the needle body section is connected, the other end telescopic mounting of needle tail section in the top of position of placing, the sampling needle stretches out in order to be used for breaking through the test tube cap and get into the inside sample of sucking or the withdrawal of test tube in order to be used for taking out the sample.

According to the technical scheme, the sampling needle comprises a needle head and a tube body which are connected with each other, the tube body is provided with a sample suction port, a sampling channel is arranged in the tube body, the sampling channel is communicated with the sample suction port, a deflation groove extending along the length direction of the tube body is formed in the outer side of the tube body, on the cross section perpendicular to the length direction of the tube body, the width of the deflation groove is gradually expanded from one side of the outer side of the tube body to the sampling channel, the needle head is used for inserting a test tube cap, the deflation groove is used for decompressing a test tube, and specifically, the needle head of the sampling needle is inserted into the test tube cap of the test tube until the deflation groove enters the test tube, as the test tube is positive-pressure inside, gas inside the test tube enters the deflation groove and is discharged out of the test tube, and after the needle head is inserted into the test tube, the deflation groove can cut the test tube cap to form chips, the deflation groove is designed to gradually expand along the length direction of the tube body outside the test tube body, the opening of the outer side of the deflation groove is smaller, the inner side opening of the deflation groove is larger, the chips are blocked by the outer wall of the opening of the deflation groove, the sampling needle is prevented from entering the deflation groove of the test tube cap, the test tube cap is prevented from entering the test tube body, the inside the test tube is greatly and the test tube is prevented from being impacted by the air-discharging channel after the test tube is completely is reduced to the air-discharging the test tube.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings which are required in the description of the embodiments or the prior art will be briefly described below, it being obvious that the drawings in the description below are only some embodiments of the utility model, and that other drawings can be obtained without the inventive effort by a person skilled in the art, in a structure which is shown in accordance with these drawings.

FIG. 1 is a schematic view of a sampling needle according to an embodiment of the present utility model;

FIG. 2 is a schematic view showing an internal structure of a sampling needle according to an embodiment of the present utility model;

FIG. 3 is a cross-sectional view at A-A of FIG. 2;

FIG. 4 is an enlarged view of FIG. 3 at B;

FIG. 5 is a partial cross-sectional view of a sampling needle according to an embodiment of the present utility model;

FIG. 6 is a schematic diagram showing a structure of a blood cell analyzer according to an embodiment of the present utility model.

Reference numerals illustrate:

the achievement of the object, functional features and advantages of the present utility model will be further described with reference to the drawings in connection with the embodiments.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, based on the embodiments of the utility model, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the utility model.

It should be noted that all directional indicators (such as upper and lower … …) in the embodiments of the present utility model are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in fig. 1), and if the specific posture is changed, the directional indicator is changed accordingly.

Furthermore, descriptions such as those referred to as "first," "second," and the like, are provided for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying an order of magnitude of the indicated technical features in the present disclosure. Thus, a feature defining "a first" or "a second" can include at least one such feature, either explicitly or implicitly.

Moreover, the technical solutions of the embodiments of the present utility model can be combined with each other, but it is necessary to be based on the fact that those skilled in the art can realize the technical solutions, and when the technical solutions are contradictory or cannot be realized, the technical solutions should be considered that the combination of the technical solutions does not exist, and the combination is not within the scope of protection required by the present utility model.

Referring to fig. 1 to 5, the present utility model provides a sampling needle including: comprises a needle head 1 and a tube body 2 which are connected with each other, the tube body 2 is provided with a sample suction port 11, a sampling channel 21 is arranged in the tube body 2, the sampling channel 21 is communicated with the sample suction port 11, a deflation groove 22 which extends along the length direction of the tube body 2 is formed on the outer side of the tube body 2, the width of the deflation groove 22 is gradually expanded from the outer side of the tube body 2 to one side of the sampling channel 21 on the cross section vertical to the length direction of the tube body 2, the needle head 1 is used for inserting a test tube cap, the deflation groove 22 is used for decompressing a test tube, in particular, the needle head 1 of a collection needle 100 is inserted into the test tube cap of the test tube until the deflation groove 22 enters the interior of the test tube, because the interior of the test tube is positive pressure, the gas in the test tube is discharged out of the test tube through the deflation groove 22, and after the needle head 1 is inserted into the test tube, the deflation groove 22 of the collection needle cuts the test tube cap to form fragments, the width of the deflation groove 22 is designed to be gradually expanded along the direction vertical to the length direction of the tube body 2, the opening at the outer side of the air discharge groove 22 is smaller, the inner side opening is larger, most of the scraps are blocked by the outer wall of the opening of the air discharge groove 22, the scraps are prevented from entering the air discharge groove 22 of the sampling needle, the size of the inner side opening of the air discharge groove 22 is larger to ensure enough air discharge amount, the influence of air pressure on the test result is reduced, compared with the scheme in the prior art that the sample suction and air discharge channels are integrated into the sampling needle, the structure is simple in production, the cost is not required too much, the air discharge groove 22 is arranged into a dovetail groove structure, the width of the air discharge groove 22 is gradually widened along the length direction of the vertical pipe body 2 from the outer side of the pipe body 2, under the condition that the air discharge amount can be ensured, the test pipe cap is prevented from being cut by the air discharge groove 22 to form the scraps to enter the air discharge groove 22, the pipeline is not blocked by the scraps of the test pipe cap after the collecting needle 100 enters the instrument, affecting performance.

Referring to fig. 1 to 5, in an embodiment, the tube body 2 includes a suction section 23, a transition section 24 and a needle section 25 which are sequentially connected, the sample suction port 11 is disposed in the suction section 23, the air release groove 22 extends from the transition section 24 to the needle section 25, and the air release groove 22 extends from the transition section 24 to the needle section 25, so as to ensure that the air release effect meets the design requirement, and ensure that the air pressure inside the test tube does not affect the test result as much as possible.

In an embodiment, the one end of the air vent groove 22 near the sample suction port 11 is formed with a smooth section, the air vent groove 22 comprises a bottom surface 221 and side surfaces 222 arranged on the bottom surface 221 at intervals, an arc chamfer is formed at the joint of the bottom surface 221 and the side surfaces 222, a round corner is formed at one side of the side surfaces 222 far away from the bottom surface 221, when the air vent groove 22 enters a test tube, the smooth section cuts the test tube cap first, the contact surface is smoother when the test tube cap is punctured during cutting, chips are reduced, and meanwhile, the arc chamfer and the round corner are formed at the inner opening and the outer opening of the air vent groove 22 respectively to further prevent the chips from entering the air vent groove 22 from the root.

Referring to fig. 2 to 5, in an embodiment, the number of the air release grooves 22 is at least one, the tube body is a circular tube, the air release grooves 22 are arranged on the outer wall of the circular tube, and the tube body is arranged as a circular tube, so that cutting with a test tube cap when the tube body enters a test tube can be reduced, and generation of chips is reduced.

Referring to fig. 2 to 5, in an embodiment, the number of the air release grooves 22 is at least two, the air release grooves 22 are uniformly distributed at intervals along the circumferential direction of the circular tube, and by uniformly distributing the air release grooves 22 at intervals along the circumferential direction of the circular tube, the air release grooves 22 can uniformly release the air in the test tube as soon as possible after the collection needle 100 pierces into the test tube, so that the gas accumulation in the tube body part does not occur into the collection channel, and the structure of the collection needle 100 can be more attractive.

Preferably, when the number of the air discharging grooves 22 is two, the pipe body 2 is a circular pipe, the two air discharging grooves 22 are arranged at intervals along the circumferential direction of the circular pipe, after the two air discharging grooves 22 enter the test tube, air in the test tube is discharged from the two air discharging grooves 22 respectively, and better air discharging effect can be ensured by arranging the two air discharging grooves 22, and if more than two air discharging grooves 22 are arranged, the service life of the sampling needle can be influenced.

In an embodiment, the included angle between the bottom 221 and the side 222 of the air release groove 22 ranges from 20 ° to 85 °, when the included angle between the bottom 221 and the side 222 of the air release groove 22 ranges from the above range, a good air release effect is achieved, and preferably, when the included angle between the bottom 221 and the side 222 of the air release groove 22 ranges from 60 °.

In one embodiment, the top opening 223 of the air bleed slot 22 is 0.1mm to 0.5mm in size, the bottom opening 224 of the air bleed slot 22 is 0.2mm to 1mm in size, and the depth of the air bleed slot 22 is 0.1mm to 0.5mm, and the effect of the air bleed slot 22 can be further optimized when the size of the air bleed slot 22 satisfies the above values.

In one embodiment, the length dimension of the air bleed slot 22 is 40mm to 90mm, preferably when the length dimension of the air bleed slot 22 is 80mm, to better approximate the amount of air bleed required at design time.

Referring to fig. 1 to 6, the present utility model further provides a blood cell analyzer 200, where the blood cell analyzer 200 includes a body 201 and the above-mentioned sampling needle, and the sampling needle is mounted on the body 201, and since the blood cell analyzer 200 adopts all the technical solutions of all the embodiments, at least has all the beneficial effects brought by the technical solutions of the embodiments, and will not be described in detail herein.

Referring to fig. 1-6, in an embodiment, a body 201 is provided with a placement position 201a, the placement position 201a is used for placing a test tube, a sampling needle is further provided with a needle tail section 26, one end of the needle tail section 26 is connected with a needle body section 25, the other end of the needle tail section 26 is telescopically mounted at the top end of the placement position 201a, and the sampling needle stretches out to be used for puncturing a test tube cap to enter the test tube to absorb a sample or retract to be used for taking out the sample, and the telescopic length can be accurately controlled through telescopic arrangement so as to meet automatic measurement.

The foregoing is only the preferred embodiments of the present utility model, and not the limitation of the scope of the present utility model, and all the equivalent structural changes made by the description of the present utility model and the accompanying drawings or the direct/indirect application in other related technical fields are included in the scope of the present utility model.

Claims (10)

1. The utility model provides a sampling needle, its characterized in that, includes interconnect's syringe needle and body, the body is provided with inhales the appearance mouth, the inside sampling channel that is provided with of body, sampling channel with inhale appearance mouth intercommunication, the body outside still is formed with the gassing groove that extends along body length direction, on the perpendicular to body length direction's cross section, the width of gassing groove is from body outside side sampling channel's one side is the divergent setting, the syringe needle is used for inserting test tube cap, the gassing groove is used for carrying out the pressure release to the test tube.

2. The sampling needle of claim 1, wherein the tube comprises a suction section, a transition section and a needle section connected in sequence, the suction port is disposed in the suction section, and the air bleed slot extends from the transition section to the needle section.

3. The sampling needle of claim 2, wherein the air release groove is formed with a smooth section at one end close to the sample suction port, the air release groove comprises a bottom surface and side surfaces arranged on the bottom surface at intervals, an arc chamfer is formed at the joint of the bottom surface and the side surfaces, and a round angle is formed at one side of the side surfaces away from the bottom surface.

4. A sampling needle according to claim 3, wherein the number of said air bleed grooves is at least one, said tube body is a circular tube, and said air bleed grooves are provided on the outer wall of said circular tube.

5. The sampling needle of claim 4, wherein the number of air bleed grooves is at least two, and the air bleed grooves are uniformly spaced along the circumferential direction of the circular tube.

6. A sampling needle according to claim 3, wherein the angle between the bottom and side surfaces of the bleed slot is in the range 20 ° to 85 °.

7. The sampling needle according to any one of claims 1 to 6, wherein the top opening size of the air escape slot is 0.1mm to 0.5mm, the bottom opening size of the air escape slot is 0.2mm to 1mm, and the depth size of the air escape slot is 0.1mm to 0.5mm.

8. The sampling needle of claim 7, wherein the bleed slot has a length dimension of 40mm to 90mm.

9. A blood cell analyzer comprising the body and the sampling needle of any one of claims 1 to 8, the sampling needle being mounted to the body.

10. The blood cell analyzer of claim 9, wherein the body is provided with a placement site for placing a test tube, the sampling needle further comprises a needle tail section, one end of the needle tail section is connected with the needle body section, the other end of the needle tail section is telescopically mounted at the top end of the placement site, and the sampling needle extends out for penetrating a test tube cap into the interior of the test tube to suck a sample or retract for taking the sample out.

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