WO2020093629A1 - Liquid acquisition apparatus - Google Patents

Abstract

The present invention relates to a liquid acquisition apparatus, having a handle, a sampling rod, and an absorbent body covering the outer peripheral walls of the sampling rod, the absorbent body comprising an outer layer absorbent body and an inner layer absorbent body, the inner peripheral wall of the outer layer absorbent body and the outer peripheral wall of the inner layer absorbent body being bonded together, and the density of the outer layer absorbent body being less than the density of the inner layer absorbent body; and the inner layer absorbent body has a radially telescopic axial insertion hole. The liquid collection apparatus of the present invention has a simple structure, is easy to produce and assemble, and convenient to use, easily uses collected liquid samples for subsequent testing, and can be used in various medical examination sites.

Description

Liquid collection device Technical field

The invention relates to a liquid collection device, in particular to a liquid collection device used in the fields of medical inspection and drug detection.

Background technique

In the field of medical testing and drug testing, blood, urine and saliva testing are more common. Collecting the liquid sample to be analyzed is a link in the testing process. A commonly used method of collecting liquid is to put a liquid absorber into the collected part and take out the liquid absorber after a certain period of time for subsequent testing. In order to facilitate the operation, the existing method is to fix the liquid absorption body on a sheet at the front end of a handle with an adhesive. This method has low efficiency and high cost, and the absorber can easily fall off during use.

A liquid collection device in the prior art includes a funnel. A detachable outer tube is connected below the funnel. The inner tube is provided with an inner tube with a bottom facing upward and an opening facing down. The inner tube stores a preservation liquid. The space between the outer tube and the inner tube is the outer cavity, the outer cavity is connected to the funnel, the inner tube is connected to the funnel, and the bottom of the outer tube is provided with a step for closing the nozzle of the inner tube. When the outer tube and the funnel are tightened, the inner tube and the outer chamber are sealed and sealed to ensure that the storage solution will not leak out before the device is not used; when the outer tube is rotated away from the funnel, the inner tube and the outer chamber are unclogged , To ensure that the storage solution in the inner tube is mixed with the liquid in the outer chamber, so that the liquid can be stored for a long time, thereby ensuring the quality of the sample. The device allows the preservation liquid to flow out from the bottom of the inner tube and mix with the liquid, avoiding the pollution generated during the external addition process in the prior art. However, the structure of the liquid collection device is complicated, which is not conducive to manufacturing.

Another saliva collection device in the prior art includes a liquid storage tube and a cover body. The liquid storage tube and the cover body can form an internal liquid storage space after being detached and connected. There is also an isolation membrane inside the liquid storage space. The liquid storage space is divided into two parts that are independent of each other. A piercing device is provided inside the cover body. The piercing device is used to pierce the isolation membrane after the liquid storage tube and the cover body are disconnected and connected. The liquid storage tube is made of transparent material or opaque material. This kind of liquid collecting device has many parts and is inconvenient to use.

Summary of the invention

In order to solve the above-mentioned technical problems in the prior art, the present invention discloses a liquid collection device having a handle, a sampling rod, and an absorber wrapped on the outer peripheral wall of the sampling rod. The absorber includes an outer absorber and an inner layer The absorber, the inner peripheral wall of the outer absorber and the outer peripheral wall of the inner absorber are bonded to each other, the density of the outer absorber is less than the density of the inner absorber; the inner absorber has an axial socket that can be radially expanded and contracted .

Further, the density of the outer layer of the absorbent body is 0.035-0.20 g / cm ^3, the density of the absorbent inner layer is 0.15-0.45 g / ^cm3.

Further, the inner layer absorber has a wall thickness of 0.2 mm to 3.5 mm.

Further, both the outer layer absorber and the inner layer absorber are made of bicomponent fiber bonding.

Further, the axial compression strength of the absorber is greater than the radial compression strength.

Further, the liquid collection device further includes an upper baffle plate and a lower baffle plate provided at both ends of the sampling rod, and the upper baffle plate is fixedly connected to the end of the handle.

Further, the cross-sectional area of the lower baffle plate decreases from top to bottom, and the maximum cross-sectional area of the lower baffle plate is larger than the inner diameter of the jack and smaller than the inner diameter of the jack hole.

Further, the handle, the upper baffle, the sampling rod and the lower baffle plate are integrally formed.

Further, the cross section of the lower baffle is circular.

Further, a liquid collection indicating member is provided between the absorber and the upper baffle.

As mentioned above, the liquid collection device according to the present invention can conveniently and quickly collect the liquid to be inspected, and it is easy to use the collected liquid sample for subsequent testing.

In order to make the above content of the present invention more obvious and understandable, preferred embodiments are described in detail below in conjunction with the accompanying drawings, which are described in detail below.

BRIEF DESCRIPTION

The present invention will be described below with reference to the drawings.

1 is a schematic cross-sectional view of a liquid collection device according to a first embodiment of the present invention;

2 is a schematic cross-sectional view of a liquid collection device according to a second embodiment of the present invention;

3 is a schematic cross-sectional view of a liquid collection device according to a third embodiment of the present invention;

4 is a schematic structural diagram of a liquid collection container matched with a liquid collection device of a third embodiment of the present invention;

5 is a schematic structural diagram of a liquid collection device according to a fourth embodiment of the present invention;

FIG. 6 is a schematic diagram of the A-A section in FIG. 5.

detailed description

The following describes the implementation of the present invention by specific specific examples. Those skilled in the art can easily understand the advantages and effects of the present invention from the content disclosed in this specification.

It should be noted that in the present invention, the lower end or front end in the drawings refers to one end of the lower baffle, and the upper end or rear end refers to one end of the handle.

Exemplary embodiments of the present invention will now be described with reference to the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to disclose the present invention in detail and completely Invention, and fully convey the scope of the invention to those skilled in the art. The terminology shown in the exemplary embodiments in the drawings does not limit the present invention. In the drawings, the same units / elements use the same reference numerals.

Unless otherwise stated, the terms used herein include scientific and technical terms that have a commonly understood meaning to those skilled in the art. In addition, it is understandable that terms defined in commonly used dictionaries should be understood to have the same meaning as the context of their related fields, and should not be understood as idealized or overly formal.

First embodiment

1 is a schematic cross-sectional view of a liquid collection device according to a first embodiment of the present invention. As shown in FIG. 1, the liquid collection device according to the first embodiment of the present invention has a handle 1, a sampling rod 13 and an absorber 2 wrapped on the outer peripheral wall of the sampling rod 13, the absorber 2 includes an outer layer absorber 21 and The inner layer absorber 22, the inner peripheral wall of the outer layer absorber 21 and the outer peripheral wall of the inner layer absorber 22 are bonded to each other, the density of the outer layer absorber 21 is less than the density of the inner layer absorber 22; the inner layer absorber 22 has Radial telescopic axial jack 23.

The handle 1 in the present invention is generally a cylinder, and its function is to provide a sampler with a holding part for operating the liquid collection device. Of course, the handle 1 can also be provided in other three-dimensional shapes that are easy to hold, such as a square column.

The sampling rod 13 in the present invention is preferably a cylindrical body, the outer peripheral wall of which is covered with an absorber 2 and can be directly or indirectly fixedly connected to the end of the handle 1. The sampling rod 13 can be injection molded from plastics such as polypropylene and polymethyl methacrylate. In particular, the handle 1 and the sampling rod 13 can be integrally injection-molded to reduce the parts to be assembled and simplify the assembly process.

The main function of the outer layer absorber 21 according to the present invention is to absorb the liquid sample and release the liquid in subsequent tests. Suitable outer absorbent member density of 0.035-0.20 g / cm ^3, high density, porosity of the outer layer of the absorbent body 21 is too small, will result in insufficient liquid absorption, in addition to a high density high hardness outer layer of the absorbent body 21 , May cause discomfort to the sampled. When the density of the outer layer absorber 21 is too low, it is difficult to manufacture the outer layer absorber 21, and the capillary force of the outer layer absorber 21 having a too low density is insufficient, which may cause difficulty in sampling. The appropriate density is selected according to the application requirements. The outer layer absorber 21 is relatively soft and has sufficient capillary force. The sampling speed is fast and the collection volume is large. It is easy to release the collected liquid sample after radial extrusion.

The main function of the inner layer absorber 22 according to the present invention is to support the softer outer layer absorber 21 and form an axial socket 23 that can be radially expanded and contracted, so that the absorber 2 and other components of the liquid collection device can be easily assembled Significantly reduce manufacturing costs and improve product reliability. The axially retractable axial insertion hole 23 can be expanded radially under the action of external force to increase the inner diameter of the insertion hole 23 to facilitate the insertion and assembly of the sampling rod 13. After the sampling rod 13 is assembled in place, the insertion hole 23 can be radially contracted and reset, thereby tightly covering the outer peripheral wall of the sampling rod 13 to form a tight assembly.

The absorbent density of the inner layer 22 is 0.15-0.45 g / ^cm3. If the density of the inner layer absorber 22 is too low, the strength is insufficient, and the absorber may easily fall off the sampling rod 13. If the density of the inner layer absorber 22 is too high, the radial expansion and contraction of the socket will be too low, making it difficult to assemble. The wall thickness of the inner absorber 22 is 0.2-3.5 mm. Since the device is mainly used for collecting liquid samples of human body parts such as the oral cavity, nasal cavity, cervix, and vagina, a smaller absorber 2 is more suitable. The thinner wall thickness of the inner layer absorber 22 is helpful to reduce the diameter of the absorber and is beneficial to making a smaller liquid collection device; the larger wall thickness of the inner layer absorber 22 is beneficial to increase the strength of the inner layer absorber 22 It is suitable for applications that require high strength of the inner absorber 22, such as a liquid collection device that needs to squeeze out the liquid collected in the absorber 2.

According to the liquid collecting device of the present invention, the absorber 2 includes a higher density inner layer absorber 22 and a lower density outer layer absorber 21, both of which are made of bicomponent fiber bonding, preferably a sheath-core structure or Bicomponent fiber with eccentric structure, such as polyethylene / polypropylene fiber, polyethylene / polyester fiber, etc., using chemically inert polyethylene as the skin layer of the fiber can reduce the adsorption of the measured component in the liquid sample and improve The sensitivity of subsequent tests. By bonding the inner wall of the outer layer absorber 21 and the outer wall of the inner layer absorber 22 to each other, the outer layer absorber can be prevented from falling off during assembly or use.

According to the liquid collecting device of the present invention, the axial compressive strength of the absorber 2 is greater than the radial compressive strength. With this structure, the liquid collected in the absorber 2 can be squeezed out by radial compression.

The liquid collection device further includes an upper baffle 12 and a lower baffle plate 14 provided at both ends of the sampling rod 13. The upper baffle 12 is fixedly connected to the end of the handle 1.

The cross-sectional area of the lower baffle plate 14 decreases from top to bottom. The maximum cross-sectional area of the lower baffle plate 14 is larger than the inner diameter of the insertion hole 23 and smaller than the maximum expanded inner diameter of the insertion hole 23.

In order to simplify the assembly process and reduce costs, in this embodiment, the handle 1, the sampling rod 13, the upper baffle 12 and the lower baffle 14 are integrally formed, preferably by injection molding. The absorber 2 is used to absorb the liquid to be detected, and the absorber 2 is provided with an axial socket that can expand and contract radially. Since the cross section of the lower baffle 14 decreases from top to bottom, the maximum cross-sectional area of the lower baffle plate 14 It is larger than the inner diameter of the jack 23 and smaller than the largest expanded inner diameter of the jack 23. Preferably, the cross section of the lower end of the lower baffle 14 is set to be smaller than the cross section of the insertion hole 23 in the inner layer absorber 22, and when the lower baffle 14 is inserted into the insertion hole 23 of the inner layer absorber 22, the insertion hole 23 is radially supported Open, so that the lower baffle 14 and the lower part of the sampling rod 13 can smoothly pass through the insertion hole 23, and when the lower baffle 14 completely passes through the insertion hole 23, the insertion hole 23 retracts radially. Since the maximum cross section of the lower baffle plate 14 is larger than the cross section of the insertion hole 23, the absorber 2 cannot escape from the lower baffle plate. After the liquid sample is collected, it can be directly used for subsequent testing.

The cross section of the lower baffle plate 14 is preferably a circular or nearly circular polygon. The longitudinal section of the lower baffle plate 14 is preferably trapezoidal, arc-shaped, or the like. In this embodiment, the longitudinal section of the lower baffle plate 14 is trapezoidal.

Second embodiment

2 is a schematic cross-sectional view of a liquid collection device according to a second embodiment of the present invention. The structure of this embodiment is similar to that of the first embodiment, and the same parts as those of the first embodiment will not be repeated in the description of this embodiment.

As shown in FIG. 2, in the liquid collection device of this embodiment, the front end of the absorber 2 is formed into a spherical crown shape, and the wall thickness of the inner absorber 22 is 0.2 mm. If the strength of the inner absorber 22 needs to be increased, The wall thickness of the inner layer absorber 22 is appropriately increased. The liquid collection device of this embodiment is suitable for collecting samples in a small and sensitive human body part. For example, nasal cavity, cervix, vagina, etc.

In the liquid collection device of this embodiment, an indicator part 3 is provided between the upper end of the absorber 2 and the upper baffle 12, such as a protonized discoloration test paper, which can observe the collection state of the liquid sample by the absorber in real time during sampling to facilitate judgment Whether the sample collection has been completed.

In the present embodiment, the longitudinal cross section of the lower baffle plate 14 is provided in an arc shape.

Third embodiment

3 is a schematic cross-sectional view of a liquid collection device according to a third embodiment of the present invention. The structure of this embodiment is similar to that of the first embodiment, and the same parts as those of the first embodiment will not be repeated in the description of this embodiment.

As shown in FIG. 3, this embodiment is similar to the first embodiment. Liquid collection apparatus according to the present embodiment is used in the oral cavity, the saliva for the detection of drug abuse, the outer layer 21 of the absorbent member density of 0.08 g / cm ³ or so, the density of the inner layer absorbent body 22 is 0.35 g / cm ^3, the wall The thickness is 1.5 mm, so that the inner layer absorber 22 has high strength. In this embodiment, the longitudinal section of the lower baffle plate 14 is trapezoidal.

In this embodiment, in the process of manufacturing the absorber 2, the fiber arrangement direction can be controlled so that the axial compressive strength of the absorber 2 is greater than the radial compressive strength.

FIG. 4 is a schematic structural diagram of a liquid collection container matched with a liquid collection device of a third embodiment of the present invention. As shown in FIG. 4, when the absorber 2 absorbs enough liquid, insert the matching liquid collection container 4 as shown in FIG. 4, and press down on the handle 1 to radially compress the absorber 2, thereby compressing the absorber 2 inside. The liquid is squeezed into the liquid collection container 4.

Specifically, as shown in FIG. 4, the liquid collection container 4 used in conjunction with the liquid collection device shown in FIG. 3 includes a liquid collection chamber 41, and a liquid compression chamber 41 disposed in the liquid collection chamber 41 for radially compressing the absorber 2 Compression department. The compression portion includes a conical introduction port 42, a radial compression chamber 43 provided at the lower part of the introduction port 42, and a liquid discharge port 44 provided near the junction of the introduction port 42 and the radial compression chamber 43. The liquid discharge port 44 communicates with the liquid collection chamber 41. The diameter of the upper baffle 2 is substantially equal to the diameter of the absorber 2 after fully radial compression, the inner diameter of the radial compression chamber 43 is slightly larger than the diameter of the absorber 2 after fully radial compression, and the maximum cross-sectional diameter of the lower baffle plate 14 is smaller than the absorption The diameter of the body 2 after fully radial compression. The upper baffle 12 is provided to have greater strength so as to facilitate pressing the absorber 2 into the liquid collection container 4.

After the absorber 2 absorbs enough liquid, the handle 1 presses the absorber 2 into the conical inlet 42 of the liquid collection container 4, and the absorber 2 is gradually compressed radially until it is pressed into the radial compression cavity 43. In the radial compression chamber 43, the absorber 2 is sufficiently compressed in the radial direction, the absorbed liquid is fully released, and flows into the liquid collection chamber 41 through the liquid discharge port 44, thereby completing the liquid collection work. The collected liquid sample is used for subsequent detection.

Fourth embodiment

5 is a schematic cross-sectional view of a liquid collection device according to a fourth embodiment of the present invention. The structure of this embodiment is similar to that of the first embodiment, and the same parts as the first embodiment will not be repeated in the description of this embodiment.

As shown in FIG. 5, this embodiment is similar to the first embodiment. The liquid collection device of this embodiment is used to collect saliva in the oral cavity for the detection of diseases such as acquired immunodeficiency. In the process of collecting saliva, the absorber needs to rub the gingival region to obtain some epithelial cells, for example, to detect AIDS through oral sampling.

The density of the absorbent layer 21 was 0.20 g / cm ^3, the density of the inner layer absorbent body 22 is 0.45 g / cm ^3, the thickness is set to 2mm-3.5mm, so that the absorbent body has a high strength. In this embodiment, the lower end of the thickened handle 1 also serves as the upper baffle 12 and fixes the absorber 2 together with the arc-shaped lower baffle plate 14.

FIG. 6 is a schematic diagram of the A-A section in FIG. 5. In this embodiment, the cross-sectional profile of the outer layer absorber 21 is tooth-shaped, so as to increase the effect of epithelial cells when rubbing the gums.

In summary, the liquid collection device according to the present invention has a simple structure and is easy to manufacture, and uses the radially retractable axial insertion hole 23 made of the two-component fibers bonded in the absorber 2 to fix the absorber 2 Between the upper baffle 12 and the lower baffle 14, the manufacturing cost is greatly reduced and the absorber will not fall off during use. The liquid collection device of the invention can be widely used in various medical detection occasions, and has good social significance and economic value.

The above-mentioned embodiments only exemplarily illustrate the principle and efficacy of the present invention, and are not intended to limit the present invention. Any person skilled in the art may modify or change the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those skilled in the art without departing from the spirit and technical ideas disclosed in the present invention should still be covered by the claims of the present invention.

Claims (10)

A liquid collection device has a handle (1), a sampling rod (13) and an absorber (2) wrapped on the outer peripheral wall of the sampling rod (13), characterized in that: The absorber (2) includes an outer layer absorber (21) and an inner layer absorber (22), the inner peripheral wall of the outer layer absorber (21) and the outer peripheral wall of the inner layer absorber (22) are mutually Bonding, the density of the outer layer absorber (21) is less than the density of the inner layer absorber (22); The inner layer absorber (22) has an axial insertion hole (23) that can expand and contract radially. Liquid collection apparatus according to claim 1, wherein the density of the absorber layer (21) of 0.035-0.20 g / cm ^3, the density of the inner absorbent member (22) is 0.15-0.45 g / cm ^3. The liquid collection device according to claim 1, characterized in that the inner layer absorber (22) has a wall thickness of 0.2 mm to 3.5 mm. The liquid collection device according to claim 1, wherein the outer layer absorber (21) and the inner layer absorber (22) are made of bicomponent fiber bonding. The liquid collecting device according to claim 1, characterized in that the axial compressive strength of the absorber (2) is greater than the radial compressive strength. The liquid collection device according to claim 1, characterized in that the liquid collection device further comprises an upper baffle (12) and a lower baffle plate (14) provided at both ends of the sampling rod (13), the upper The baffle (12) is fixedly connected to the end of the handle (1). The liquid collection device according to claim 6, characterized in that the cross-sectional area of the lower baffle plate (14) decreases from top to bottom, and the maximum cross-sectional area of the lower baffle plate (14) is larger than the insertion The inner diameter of the hole (23) is smaller than the largest expanded inner diameter of the insertion hole (23). The liquid collection device according to claim 6, characterized in that the handle (1), the upper baffle (12), the sampling rod (13) and the lower baffle plate (14) are integrally formed. The liquid collection device according to claim 6, wherein the cross section of the lower baffle is circular. The liquid collection device according to claim 6, characterized in that a liquid collection indication member (3) is provided between the absorber (2) and the upper baffle (12).

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