CN218899525U - Hair sample collection device - Google Patents

Abstract

The utility model provides a hair sample collecting device, which comprises a hair cutting unit and a hair quantitative collecting unit, wherein the hair cutting unit is assembled with the hair quantitative collecting unit through a piston and an elastic element, and hair samples can be sampled by pressing a shell. The hair sample collecting device is simple in structure, convenient to use, safe and reliable, can be used for quantitatively sampling hair easily, is convenient to hold, can be used for sampling hair by hands or even by holding the hair sample collecting device in one hand, can obtain hair samples with consistent length, are orderly arranged and have consistent quantity, and the obtained hair samples can be directly used for extracting analyzed substances or directly testing the analyzed substances.

Description

Hair sample collection device

The present application claims a chinese prior application, application number: 202010779484X, priority of 8/5 of the filing date 2020, all of which are included as part of the present utility model.

Technical Field

The present utility model relates to a collecting device, in particular in the field of rapid diagnosis, for collecting hair as a sample for detection.

Background

The following background description is only an illustration of some of the general background knowledge and is not intended to limit the utility model in any way.

Medical or household rapid detection devices are commonly used to detect whether a sample contains an analyte, for example for early pregnancy detection, drug detection, etc. The detection device is provided with a collecting cavity for collecting a sample to be detected, and a test element is arranged in the collecting cavity. After the sample to be tested enters the collecting cavity through the opening of the collecting cavity, the sample to be tested contacts with the testing element, and the testing element detects the sample to be tested. The test element has a detection zone for displaying the detection result, which can be read from outside the collection chamber through the side wall of the collection chamber.

When the sample is a hair sample, the sample is first contained in the hair with some difficulty for detection, but the analyte is required to be dissolved and extracted from the hair in a solution form by a physical or chemical means, so that the next analysis can be performed. The traditional method is to cut the hair by scissors, then put the hair into a sample bag and send the hair into a detection mechanism, so that the detection mechanism needs to continue to process the sample after taking the sample, such as cutting or finishing, and then the chemical reagent treatment is performed to dissolve the analyzed substance, which brings much inconvenience to the sample processing.

The substances to be analyzed (e.g. drugs of abuse) currently detected with hair samples are typically colloidal gold, enzyme-linked immunosorbent or liquid or gas chromatography. However, it is necessary to treat the hair with a chemical agent in order to analyze the analyte from the hair.

Therefore, there is a need to provide a collection device for collecting hair samples that improves the handling of the samples and can be used directly for extraction of the analyte.

Disclosure of Invention

The utility model aims at overcoming the defects and shortcomings of the prior art, and provides a novel hair sample collecting device which is simple in structure and convenient to use, can be used for easily and quantitatively sampling hair, and the obtained sample can be directly used for extracting an analyzed substance or directly testing the analyzed substance.

To achieve the above object, the present utility model provides a hair sample collection device comprising a hair cutting unit, a hair quantitative collection unit, and an elastic member; the hair cutting unit is assembled with the hair-quantifying collecting unit by means of an elastic member.

The hair quantitative collection unit can be used for quantitatively collecting hair, wherein the quantitative collection means that the collected hair samples are kept consistent in length (after being cut by the hair cutting unit), the hair samples are approximately the same in number and ordered, and the hair quantitative collection unit can be directly used for extracting and detecting substances to be analyzed in subsequent hair samples.

The elastic member movably connects the hair cutting unit and the hair-quantifying collecting unit together.

Further, the hair cutting unit is connected with the hair quantitative collection unit through a piston structure, and the hair cutting unit can move along the piston structure; the elastic element is arranged on the piston structure.

The hair cutting unit can move along the piston structure, namely, the hair cutting unit can move along the moving direction of opening or closing the piston structure, and if the piston structure is vertically arranged, the movement is up-and-down movement.

Further, the piston structure comprises a piston and a piston cavity which are respectively arranged on the hair cutting unit and the hair quantitative collecting unit; when the hair cutting unit is provided with a piston, the hair quantitative collecting unit is provided with a piston cavity matched with the piston; when the hair quantitative collecting unit is provided with a piston, the hair cutting unit is provided with a piston cavity matched with the piston.

Further, the hair cutting unit comprises a housing and a cutting element; the cutting element is secured within the housing and the piston is disposed within the housing.

Further, the cutting element is a blade. Any sharp material that can be used for cutting can be used as a cutting element and is within the scope of the present utility model.

Further, the blades comprise two groups, and are fixed on two sides of the shell.

Further, blade grooves are respectively formed in two sides of the shell, and the two groups of blades are respectively arranged in the blade grooves in two sides of the shell.

Further, the hair quantitative collection unit comprises a carrier, a hair collection tank and a base; the carrier, the hair collecting tank and the base are connected in sequence; the carrier is connected with the hair cutting unit; the piston chamber is disposed on the carrier.

In some embodiments, the carrier may be used to carry the hair-cutting element, and the carrier may be a platform structure, or may be a structure in which one, two, three, or four sides house the hair-cutting element.

Further, the carrier of the hair-quantifying collecting unit is a cavity containing a hair-cutting unit that is movable within the cavity.

In some embodiments, the cavity may house the bottom of the hair-cutting element on four sides, which may be the height of the housing of the hair-cutting element, or 1/10, 1/5, 1/2, 2/3, 3/5, etc. of the height of the housing of the hair-cutting element, but the upper part of the hair-cutting element remains exposed.

Further, the hair collecting tank is a tank body structure with one side open.

The groove body structure with one side being opened is more convenient for taking and placing hair samples, meanwhile, the quantity of the placed hair samples is basically consistent due to the size limitation of the groove body structure, and the hair samples with consistent length, neat arrangement and consistent quantity can be obtained through simultaneous cutting of the two groups of blades.

Further, the hair collecting tank is composed of a lower surface of the carrier, an upper surface of the base, and a connecting portion of the carrier and the base.

Further, the connecting part of the carrier and the base is an arc-shaped surface.

It will be appreciated that the carrier and base are shaped in any manner to provide a quantitative function for the hair sample, and that the utility model preferably employs an arcuate configuration for ease of design and manufacture. The arc structure is a cylindrical structure formed by arc-shaped actual structure, and is arc-shaped when seen from the side surface. The arc shape can be any arc shape, including circular arc shape, curve shape, straight line shape, etc.

Further, the hair collecting tank is a detachable tank body, the shape of the hair collecting tank is matched with the shape of an inner groove formed by the lower surface of the carrier, the upper surface of the base and the connecting part of the carrier and the base, and the hair collecting tank can be embedded in the inner groove.

Further, the number of the pistons or the piston chambers is more than 1.

In some embodiments, the number of pistons or piston chambers is 1, 2, 3, 4, 5, 6, etc.

Further, two pistons are arranged on the shell, and two piston cavities corresponding to the two groups of pistons respectively are arranged on the carrier.

Further, each piston is structurally provided with an elastic element; when the cutting element of the hair cutting unit moves down the piston structure, the resilient element is compressed, and the hair can be cut off.

Further, the elastic element is a spring and is sleeved on the piston cavity or the piston; when the spring is sleeved on the piston cavity, the diameter of the spring is larger than the outer diameter of the piston cavity, and the length of the spring is larger than the length of the piston cavity; when the spring is sleeved on the piston, the diameter of the spring is larger than the diameter of the piston, smaller than the outer diameter of the piston cavity and larger or smaller than the inner diameter of the piston cavity.

Further, when the spring is sleeved on the piston, the diameter of the spring is smaller than the inner diameter of the piston chamber, and the length of the spring is larger than the length of the piston chamber.

In some modes, one end of the spring can be fixedly connected with the shell, and the other end of the spring is connected with the bottom of the cavity, so that the shell is movably connected together through the spring base.

In some modes, the springs are not fixedly connected, and the movable connection between the shell and the base can be realized only through the connection between the piston and the piston cavity.

In some modes, the spring is sleeved on the piston, the movement of the shell is realized by compressing the spring through the movement of the piston, and the spring returns to the initial state to drive the shell to move upwards, so that the displacement of the shell is realized and the initial state is automatically restored.

Further, the outer surface of the shell is provided with a groove convenient to press.

In some modes, the surface of the groove can be provided with ribs, so that friction is increased, and the pressing is convenient.

The utility model provides a hair sample collection device, wherein a hair cutting unit of the hair sample collection device is provided with a first position and a second position in a cavity. When in the first position, the hair cutting unit is in an initial first position, and the elastic element is in an initial natural state; the external force presses the groove on the shell surface of the hair cutting unit, so that the hair cutting unit overcomes the elasticity of the elastic element, when the hair cutting unit is in the second position, the piston enters the piston cavity, the blade enters the quantifying unit, and the elastic element is compressed, so that the hair is cut off; when the external force is removed, the elastic element is restored to the non-compressed state, and the hair cutting unit is also restored to the initial first position.

The back and forth movement of the hair-cutting element is achieved by means of said elastic element being compressed or returning to its elasticity.

The hair sample collecting device provided by the utility model can be prepared into various sizes and specifications according to actual needs, can be designed according to the length of the hair to be sampled, and controls the length of the hair to be sampled by controlling the distance between the two groups of blades; the hair sample collection device can be designed according to the fact that a single-hand hair sample collection device is required to conduct sampling in the sampling process, so that the hair sample collection device can be made into a small and light device which is convenient to hold.

In yet another aspect, the present utility model provides a method of hair sample collection, the method comprising the steps of:

1) Placing hair in the hair-quantifying collecting unit of the device as described above, pressing the hair-cutting unit to cut off the hair;

2) The hair is removed for subsequent treatment and detection, the subsequent treatment comprising extraction of the analyte in the hair with a chemical agent.

Further, the hair sample in step 1) is placed in the hair collection tank of the quantitative collection unit.

The hair collecting groove of the hair sample collecting device provided by the utility model is of a groove body structure with one side open, when the hair collecting groove is positioned at the initial position, the blade is retracted into the blade groove, and when the hair sample is sampled, the hair sample passes through the opening of the hair collecting groove and is positioned in the hair collecting groove and is kept at the position under the blade, then the thumb of one hand lightly presses the pressing part groove of the shell, and the other hand can hold the base, so that the force is conveniently applied to the shell, and the sampling is completed.

The current traditional way is to cut hair samples with scissors (medical scissors). However, the samples with different lengths are usually cut from the place 3 mm away from the skin, so that the history length of the drug absorption can be indicated, for example, the samples are cut into different lengths of 3 cm, 6 cm, 7 cm, 8cm, 10 cm and the like, and the history length of the drug absorption can be calculated approximately. The use of scissors to cut hair samples is difficult to operate, is prone to damage the skin, is not easy to quantify, and instead requires weighing equipment to weigh the sample, in addition, if the sample needs to be sampled in sections, the sectional cutting of different sizes is not easy to achieve due to the softness of the hair. The hair sample collecting device provided by the utility model can well solve the problems, so that quantitative sampling of hair samples can be conveniently realized.

The hair sample collection device provided by the utility model has the following main beneficial effects:

1. the hair sampling device is convenient to hold, and can realize hair sampling by holding the hair sample collecting device with both hands or even with one hand;

2. the hair sample can be sampled by only pressing down the shell and moving up and down;

3. the hair sample can be conveniently and quantitatively obtained, and the obtained sample can be directly used for extracting the analyzed substance or directly testing;

4. the sharp blade is located inside the device, and is safer, can not appear the condition of accidentally injuring the people.

Drawings

Fig. 1 is a schematic view of the structure of a hair sample collection device provided in example 1.

Fig. 2 is a cross-sectional view of the hair sample collection device provided in example 1.

Fig. 3 is an exploded view of the hair sample collection device provided in example 1.

Fig. 4 is a schematic view showing the structure of a hair cutting unit (without a blade) of the hair sample collection device provided in example 1.

Fig. 5 is a schematic view of the hair sample collection device provided in example 1 in a sampling state.

Detailed Description

The following is a further description of structural or technical terms related to the present utility model, which, unless otherwise indicated, are to be understood and interpreted according to general terms in the art.

Detection of

Detection indicates the assay or testing for the presence of a substance or material. Such as, but not limited to, a chemical, an organic compound, an inorganic compound, a metabolic product, a drug or drug metabolite, an organic tissue or a metabolite of an organic tissue, a nucleic acid, a protein or a polymer. In addition, the detection may also be indicative of the amount of the test substance or material. Assays also refer to immunoassays, chemical assays, enzymatic assays, and the like.

Sample of

In the present utility model, the sample collected by the detection device includes a biological fluid. The initial state of the sample may be liquid, solid or semi-solid, which may be converted to a liquid sample by any suitable method, such as mixing, mashing, maceration, incubation, solubilization, enzymatic hydrolysis, etc., and then poured into a collection chamber, and the sample is tested for the presence of an analyte by a test element. The sample can be obtained from human body, animal, plant, natural, etc. Examples of the sample taken from the human body include blood, serum, urine, cerebral spinal fluid, sweat, lymph, saliva, gastric juice, etc.; solid or semi-solid samples of stool, hair, cutin, tartar, nails, and the like. Samples taken from plants, for example, may be solid samples of roots, stems, leaves, etc.; liquid or semisolid samples such as tissue fluid, cell fluid and the like prepared from roots, stems and leaves. The sample from nature can be, for example, a liquid sample such as rainwater, river water, sea water, groundwater, etc.; solid or semi-solid samples of soil, rock, ore, oil, etc.

Herein, it means a hair sample, which is collected as a sample for an assay by the present device.

Test element

A test element refers to a component that is capable of detecting an analyte in a sample to be tested. The detection of the analyte by the test element may be based on any technical principle, such as immunology, chemistry, electricity, optics, molecular, physics, etc. The test element of the present utility model may be one kind or may be a combination of two or more kinds of test elements. The test element is provided with a detection area for displaying detection results, and the detection area displays the detection results after detection.

One common form of test element is a test strip. The detection of the test paper on the sample to be detected can be based on the principle of immunoassay or chemical analysis, and can adopt an analysis mode of a non-competition method or a competition method. The test paper sequentially comprises a sample adding area, a reagent area and a test area. After the sample to be measured is added to the sample adding area, the sample flows to the reagent area through capillary action, reacts with the reagent in the reagent area, and then flows to the testing area through capillary action, and the testing area generates a signal or does not generate a signal, so that the existence or non-existence of the analyte in the sample to be measured is indicated. For example, if a Test Line appears in the Test zone, it indicates that no analyte is present in the sample to be tested; if the test area does not have a T line, the presence of the analyte in the sample to be tested is indicated. Some test papers are also provided with a control area, the control area is located behind the test area, the sample flowing through the test area continuously flows to the control area, and the control area is used for judging whether the test result of the test area is effective. For example, in some test strips, only when a Control Line (Control Line) appears in the Control area, the test result of the test area is valid, and otherwise, the test result of the test area is invalid. In the utility model, when the detection result of the test element can be read only through the test area, the detection area of the test element is the above-mentioned test area; when the detection result of the test element needs to be combined with signals generated by the test area and the control area to judge, the detection area of the test element comprises the test area and the control area. Of course, in some cases, the detection result of the test element needs to be judged in combination with the signals of other areas, and then the detection area also includes the other areas. That is, in the present utility model, the complete test result can be read through the test area of the test element. Typically, the test element includes at least a detection zone through which it is possible to obtain whether the analyte is present in the sample. For example, the color change can be seen through naked eyes through the appearance of the color and the change of the color, or can be scanned and read through a scanning device, or the test result can be read through photographing. Or have fluorescent appearance, or radial appearance, etc. And reading the test result of the detection area by using equipment.

The test element is typically comprised of a porous absorbent material such as filter paper, fiberglass, polyester film, your film, paper, nonwoven, and the like, whichever material is capable of absorbing water.

The test element is herein used to test an analyte substance, such as a drug substance, in a hair sample. In some embodiments, is used to test for analyte substances extracted or separated from a hair sample.

Methods of treating hair samples can be found in methods described in the following patent documents, such as the agent for ablating hair described in chinese patent application publication No. CN108844922, the extract described in chinese patent application publication No. CN109828039a, or the extract of the analyte in hair described in publication No. CN110044670a, for example.

Hair sample or hair sample

By hair is meant mammalian hair, which may be hair, beard, hair of any part of the body, such as chest hair, leg hair, or hair around the reproductive organs. In particular, the present utility model is generally directed to hair. In the case of hair sample detection, hair is collected first, then the collected hair is treated, and a molecular substance is extracted or dissolved from the hair sample, and then a subsequent detection is performed, which may be any detection such as an immunoassay, a chemical detection, a gas chromatography, a liquid chromatography, a genetic detection, a liquid-weather chromatography, or a combination thereof. The analyte substance is typically a drug substance.

Analyte substance

Examples of analytes that can be used in the present utility model include small molecule substances, including drugs (e.g., drugs of abuse). "drug of abuse" (DOA) refers to the use of drugs (typically acting to paralyze nerves) in non-medical destinations. Abuse of these drugs can lead to physical and mental impairment, dependence, addiction and/or death. Examples of drug abuse include ***e; amphetamine AMP (e.g., black americans, white amphetamine tablets, dextroamphetamine tablets, beans); methamphetamine MET (crank, methamphetamine, crystal, speed); barbiturate BAR (e.g., valium, roche Pharmaceuticals, nutley, new Jersey); sedatives (i.e. sleep aid drugs); lysergic acid diethylamide (LSD); inhibitors (downs, goofball, barbs, blue devils, yellow sockets, hypnone); tricyclic antidepressants (TCAs, i.e., imipramine, amitriptyline, and doxepin); dimethyl dioxy methylaniline MDMA; phencyclidine (PCP); tetrahydrocannabinol (THC, pot, rope, hash, wet, etc.); opiates (i.e., morphine MOP or, opiates, ***e COC, heroin, hydroxycodeinone); anxiolytics and sedative hypnotics, which are a class of drugs that are mainly used to relieve anxiety, stress, fear, stabilize mood, and have hypnotic sedative effects, including benzodiazepines BZO (benzodiazepines), atypical BZ, fused diazepines NB23C, benzoazepine, ligands of BZ receptors, ring-opened BZ, diphenylmethane derivatives, piperazine carboxylates, piperidine carboxylates, quinizolinones, thiazine and thiazole derivatives, other heterocycles, imidazole sedative/analgesic drugs (e.g., hydroxyhydrocodone OXY, methadone MTD), propylene glycol derivatives-carbamates, aliphatic compounds, anthracene derivatives, and the like. The detection device can also be used for detecting medical application and is easy to take excessive medicines, such as tricyclic antidepressants (promethazine or analogues), acetaminophen and the like. These drugs are metabolized into small molecular substances after being absorbed by the human body, and these small molecular substances exist in body fluids such as blood, urine, saliva, sweat, etc. or some body fluids exist in these small molecular substances.

These drug substances are also present in the hair sample.

Collecting device

The present utility model provides a collection device for collecting, acquiring or storing hair samples. Hair samples are different from ordinary body fluid samples in that the analyte is generally dissolved or contained in the body fluid sample and once collected, can be used directly for assay or detection. However, the hair sample is also treated after collection, and the quantitative purpose is not easily achieved. Therefore, the utility model provides a device special for collecting hair samples, which can automatically collect or collect hair samples, ensure consistency and accuracy of collected samples and realize quantitative purpose.

Detailed Description

The present utility model will be described in further detail with reference to the following examples, which are intended to facilitate the understanding of the present utility model without any limitation thereto.

Example 1 Hair sample collection device provided by the present utility model

The hair sample collecting device provided in this embodiment is shown in fig. 1 to 5, in which fig. 1 is an overall structure diagram of the hair sample collecting device, fig. 2 is a cross-sectional view of the hair sample collecting device, fig. 3 is an exploded view of the hair sample collecting device, and fig. 4 is a schematic diagram of a hair cutting unit (without blades) of the hair sample collecting device; fig. 5 is a schematic view of a hair sample collection device in a sampling state.

The hair sample collection device provided in this embodiment includes a hair cutting unit 1, a hair quantitative collection unit 2, and an elastic member 3; the hair cutting unit 1 is assembled with the hair-quantifying collecting unit 2 by means of the elastic member 3. Said elastic element 3 movably connects the hair cutting unit 1 with the hair-quantifying collecting unit 2. The elastic element is made of any material with elastic deformation, such as a spring, rubber, thermoplastic elastomer, etc., which belongs to the protection scope of the present utility model, and the spring is preferably used as the elastic element in this embodiment.

Meanwhile, the hair cutting unit 1 is connected with the hair quantitative collection unit 2 through a piston structure 5, and the hair cutting unit 1 can move along the piston structure 5; the elastic element 6 is arranged on the piston structure 5. The hair-cutting element 1 is movable along the piston structure 5, meaning that the hair-cutting element 1 is movable along the direction of movement of the piston structure 5, which is up and down, if the piston structure 5 is placed vertically.

Preferably, the piston structure 5 comprises a piston 10 and a piston chamber 11, which are arranged on the hair cutting unit 1 and the hair quantitative collecting unit 2, respectively; when the hair cutting unit is provided with a piston, the hair quantitative collecting unit is provided with a piston cavity matched with the piston; when the hair quantitative collecting unit is provided with a piston cavity, the hair cutting unit is provided with a piston matched with the piston cavity.

Preferably, the hair cutting unit 1 comprises a housing 6 and a cutting element 7; the cutting element 7 is fixed in the housing 6 and the piston 10 is arranged in the housing 6. In this embodiment, the cutting element 7 is mounted near the side of the housing 6. The cutting element 7 is any element having a sharp edge that can be used to cut hair, and the embodiment preferably employs a blade 8. The cutting element 7 in this embodiment is a blade 8; the blades 8 comprise two groups and are fixed on two sides of the housing 6. The two sides of the shell 6 are respectively provided with a blade groove 9, and the two groups of blades 8 are respectively arranged in the blade grooves 9 on the two sides of the shell 6. By simultaneous cutting of the two sets of blades 8, a set of hair samples of the same length and aligned can be obtained, and the number of hair samples is substantially the same due to the restriction of the hair quantification collection unit 2.

In this embodiment, the hair-weighing and collecting unit 2 is provided with a blade chamber 22 through which the two sets of blades 8 can pass, respectively.

The hair quantitative collection unit 2 comprises a carrier 4, a hair collection groove 13 and a base 14; the carrier 4, the hair collecting tank 13 and the base 14 are sequentially connected from top to bottom; the carrier 4 is connected to the hair cutting unit 1; the piston chamber 11 is arranged on the carrier 4. The carrier 4 may be used for carrying the hair-cutting element 1, and the carrier 4 may be a platform structure, or may be a structure with one, two, three or four sides enclosing the hair-cutting element 1, in this embodiment preferably with four sides enclosing the hair-cutting element 1.

Preferably, the carrier 4 of the hair-quantifying collecting unit 2 is a housing 17 containing a hair-cutting unit 1, the hair-cutting unit 1 being movable within the housing 17. The cavity 17 may house the bottom of the hair-cutting element 1 on four sides, which may be the height of the housing 6 of the hair-cutting element 1, or 1/10, 1/5, 1/2, 2/3, 3/5, etc. of the height of the housing 6 of the hair-cutting element 1, but the upper part of the hair-cutting element 1 remains exposed. The four sides in this embodiment accommodate a height of about 2/3 of the height of the housing 6.

Preferably, the hair collecting groove 13 has a groove structure with one side open. The groove body structure with one side being opened is more convenient for taking and placing hair samples, meanwhile, the quantity of the placed hair samples is basically consistent due to the size limitation of the groove body structure, and the hair samples with consistent length, neat arrangement and consistent quantity can be obtained through simultaneous cutting of the two groups of blades. The hair-catching groove 13 is formed by a lower surface 18 of the carrier, an upper surface 19 of the base, and a carrier-base connection 20.

Preferably, the connecting portion 20 of the carrier 4 and the base 14 is an arcuate surface. The arc structure is a cylindrical structure formed by arc-shaped actual structure, and is arc-shaped when seen from the side surface. The arc shape can be any arc shape, including circular arc shape, curve shape, straight line shape, etc. It will be appreciated that the carrier and base may be of any shape and function to quantify the hair sample, and for ease of design and manufacture, the preferred embodiment is a circular arc configuration.

In this embodiment, in order to improve the comfort of the user, the corners of the housing 6, the lower surface 18 of the carrier, the upper surface 19 of the base, etc. are designed to be more beautiful and safer in shape. The base 14 in the embodiment is of a hollow bracket structure, so that the weight of the equipment can be lighter, and a plurality of vertical bar brackets 21 are arranged in the base 14; in addition, the housing 6 and the cavity 17 may be hollow structures, making the whole apparatus lighter.

In this embodiment, the hair collecting tank 13 and the base 14 are fixed integrally, but of course, the hair collecting tank 13 and the base 14 may be detachably connected, and in this embodiment, the hair collecting tank 13 and the base 14 are connected integrally and are in an open tank structure.

Preferably, the number of the pistons 10 or the piston chambers 11 is 1 or more. For example, the number of pistons 10 or piston chambers 11 is 1, 2, 3, 4, 5, 6, etc. In this embodiment, the housing 6 is provided with two pistons 10, and the carrier 4 is provided with two piston chambers 11 corresponding to the two sets of pistons 10 respectively.

Preferably, each piston structure 5 is provided with an elastic element 3; when the cutting element 7 of the hair-cutting unit 1 moves down the piston structure 5, the elastic element 3 is compressed and the hair can be cut off.

Preferably, the elastic element 3 is a spring 12, which is sleeved on the piston cavity 11 or on the piston 10; when the spring 12 is sleeved on the piston cavity 11, the diameter of the spring 12 is larger than the outer diameter of the piston cavity 11, and the length of the spring 12 is longer than the length of the piston cavity 11; when the spring 12 is fitted over the piston 10, the diameter of the spring 12 is greater than the diameter of the piston 10, less than the outer diameter of the piston chamber 11, greater than or less than the inner diameter of the piston chamber 11. When the spring 12 is sleeved on the piston 10, the diameter of the spring 12 is smaller than the inner diameter of the piston cavity 11, the length of the spring 12 is longer than the length of the piston cavity 11, and the spring 12 is completely plugged into the piston cavity 11 together with the piston 10; when the diameter of the spring 12 is larger than the inner diameter of the piston chamber 11, the spring 12 cannot enter the piston chamber 11, but can only block the position where the piston 10 does not enter the piston chamber 11. The spring 12 is sleeved on the piston 10, the movement of the shell 6 is realized by compressing the spring 12 through the movement of the piston 10, and the spring 12 restores the initial state to drive the shell 6 to move upwards, so that the displacement of the shell 6 is realized and the initial state is automatically restored. The elastic unit 3 can of course also be made of other elastic materials, in this embodiment preferably a spring 12.

Preferably, the spring 12 may be fixedly connected to the housing 6 at one end and to the bottom of the cavity 17 at the other end, such that the housing 6 is movably connected to the base 14 by the spring 12. Of course, the spring 12 may not be fixedly connected, and the movable connection between the housing 6 and the base 14 may be realized only by the connection between the piston 10 and the piston chamber 11, which is also within the scope of the present utility model.

Preferably, the outer surface of the housing 6 is provided with a recess 15 for easy pressing. In this embodiment, the surface of the groove 15 is further provided with a rib 16, which increases friction and facilitates pressing.

The hair sample collection device provided by the utility model has a hair cutting element 1 with a first position 23 and a second position 24 within a cavity 17. When in the first position 23, the hair-cutting element 1 is in an initial first position, in which the elastic element 3 is in an initial natural state; the external force presses the groove 15 on the surface of the hair cutting unit housing 6, so that the hair cutting unit 4 overcomes the elastic force of the elastic element 3, when the hair cutting unit is in the second position 24, the piston 10 enters the piston cavity 11, the blade 8 enters the dosing unit 2, and the elastic element 3 is compressed, so that the hair is cut off; when the external force is removed, the elastic element 3 returns to the non-compressed state and the hair cutting element 1 also returns to the original first position.

The back and forth movement of the hair-cutting element 1 is achieved by means of said elastic element 3 being compressed or returning to its elasticity.

The hair sample collecting device provided by the utility model can be prepared into various sizes and specifications according to actual needs, can be designed according to the length of the hair to be sampled, and controls the length of the hair to be sampled by controlling the distance between the two groups of blades 8; the hair sample collection device can be designed according to the fact that a single-hand hair sample collection device is required to conduct sampling in the sampling process, so that the hair sample collection device can be made into a small and light device which is convenient to hold.

The hair sample collection device provided in this embodiment provides a distance of 8cm between the two sets of blades.

In yet another aspect, the present utility model provides a method of hair sample collection, the method comprising the steps of:

1) Placing hair in the hair-collecting tank 13, wherein the number of hairs that can be loaded each time is substantially uniform due to the size limitation of the hair-collecting tank 13, and then pressing the hair-cutting unit 1, and simultaneously cutting the hairs by the two sets of blades 8, to obtain hair samples that are 8cm in length, uniform in number, and aligned;

2) The hair sample is removed for subsequent processing and detection, including extraction of the analyte in the hair with a chemical agent.

The hair sample collecting device provided by the embodiment comprises a shell 6, wherein blades 8 are arranged on the shell 6 and are respectively arranged at two ends of the shell 6, a moving piston 10 is arranged on the shell 6, a spring 12 is sleeved outside the piston 10, part of the shell 6 is positioned in a cavity 4, the cavity 4 is provided with a piston cavity 11 matched with the piston 10, and the piston 10 can freely move in the piston cavity 11. The up-and-down movement of the housing 6 drives the up-and-down movement of the blade 8. A dosing tank or unit, in this embodiment called a hair collection tank 13, is also provided on the device, allowing hair to be located in the hair collection tank 13, facilitating the cutting of the hair sample by the blade 8, thereby completing the dosing sampling. The housing 6 further includes a portion for applying force, so that the housing 6 can be conveniently pressed, and the housing 6 can move up and down in the cavity.

The housing 6 has an initial position in the cavity 17, when the spring 12 is in its natural state and the piston 10 is in a first position in the piston chamber 11. At this point the cutting edge of the cutting blade 8 is in the outlet and thus in a safe position. When it is desired to cut and sample hair, the pressing portion groove 15 of the housing 6 is pressed with force, the housing 6 is moved from top to bottom against the reaction force of the spring 12, and at this time, the piston 10 is moved in the piston chamber 11, and the blade 8 is also moved along with the housing 6, the moving distance can be freely adjusted, and the blade is in contact with the hair collecting groove 13 of the dosing unit, as shown in fig. 5, for example, the surface of the hair collecting groove 13 is limited. When the cutting is completed, the shell 6 is loosened, the spring 12 is required to be restored to the natural state from compression, so that the shell 6 is restored to the initial position, and at the moment, the blades are also restored to the initial position along with the cover body, and the cut hair is taken out from the groove body, so that the purpose of quantitative sampling is achieved.

The hair collecting groove 13 in this embodiment is a groove structure with one side open, when in the initial position, the blade 8 is retracted into the blade groove 9, and during sampling, the hair sample is allowed to pass through the opening of the hair collecting groove 13, be positioned in the hair collecting groove 13, be kept at the position under the blade 8, then the thumb of one hand lightly presses the pressing part groove 15 of the housing 6, and the other hand can hold the base 14, so that the force is conveniently applied to the housing 6, and the sampling is completed.

When hair is placed in the tank body, the shell 6 is pressed, the shell 6 is allowed to overcome the reaction force of the spring 12, the shell 6 moves downwards from the initial position, the piston 10 also moves downwards in the piston cavity 11, the blades 8 at the two ends of the shell 6 also move downwards, and the blades cut off the hair in the tank body, so that the quantitative length and the volume of the tank body of the hair collecting tank 13 are realized, and the transverse volume of the hair volume is realized. After the cut-off, the finger is released, the force pressing the housing 6 is released, and the compressed spring 12 needs to be restored to the original state, so that the housing 6 is restored to the original state again. And (5) completing quantitative sampling of certain hair. This allows repeated sampling.

Example 2 Detachable Hair collection tank

In this embodiment, the hair sample collection device as provided in embodiment 1 is used, wherein the hair collection container 13 of the hair-weighing and collecting unit 2 is detachably connected to the base 14, and the hair collection container 13 is detached from the base 14 after the completion of the sampling, thereby completing the sampling.

Preferably, the hair-catching groove 13 provided in this embodiment is a detachable groove body, the shape of which matches the shape of the inner groove body 25 formed by the lower surface 18 of the carrier, the upper surface 19 of the base, and the carrier and base connecting portion 20, and which fits into the inner groove body 25.

Example 3 spring is located on piston

In this embodiment, the hair sample collecting device provided in embodiment 1 is adopted, the spring 12 is sleeved on the piston 10, the movement of the housing 6 is realized by compressing the spring 12 through the movement of the piston 10, and the spring returns to the initial state to drive the housing 6 to move upwards, so that the position movement of the housing 6 is realized and the initial state is automatically restored.

Example 4 obtaining hair samples of different sizes

This example employs a hair sample collection device as provided in example 1 with a distance of 12cm between the two sets of blades.

The hair sample collection method using the hair sample collection device provided in this embodiment includes the following steps:

3) Placing hair in the hair-collecting tank 13, wherein the number of hairs that can be loaded each time is substantially uniform due to the size limitation of the hair-collecting tank 13, and then pressing the hair-cutting unit 1, and simultaneously cutting the hairs by the two sets of blades 8, to obtain hair samples having a length of 12cm, uniform number, and orderly arrangement;

4) The hair sample is removed for subsequent processing and detection, including extraction of the analyzed substance from the hair with a chemical agent, such as for drug analysis.

The above description is only a specific embodiment of the utility model, but the scope of the utility model is not limited thereto, and any changes or substitutions that do not undergo the inventive work should be covered in the scope of the utility model.

Although the present utility model is disclosed above, the present utility model is not limited thereto. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the utility model, and the scope of the utility model should be assessed accordingly to that of the appended claims.

Claims (8)

1. A hair sample collection device characterized by comprising a hair cutting unit, a hair quantitative collection unit and an elastic element; the hair cutting unit is assembled with the hair quantitative collecting unit through an elastic element; the hair cutting unit is connected with the hair quantitative collecting unit through a piston structure, and the hair cutting unit can move along the piston structure; the piston structure comprises a piston and a piston cavity; the elastic element is arranged on the piston structure.

2. The hair sample collection device of claim 1, wherein the hair cutting unit comprises a housing and a cutting element; the cutting element is secured within the housing and the piston is disposed within the housing.

3. The hair sample collection device of claim 2, wherein the cutting element is a blade comprising two sets secured to opposite sides of the housing; blade grooves are respectively formed in two sides of the shell, and the two groups of blades are respectively arranged in the blade grooves in two sides of the shell.

4. A hair sample collection device according to claim 3, wherein the hair quantification collection unit comprises a carrier, a hair collection tank, a base; the carrier, the hair collecting tank and the base are connected in sequence; the carrier is connected with the hair cutting unit; the piston chamber is disposed on the carrier.

5. The hair sample collection device of claim 4, wherein the carrier of the hair quantification collection unit is a cavity containing a hair cutting unit, the hair cutting unit being movable within the cavity; the shell is provided with two pistons, and the carrier is provided with two piston cavities corresponding to the two groups of pistons respectively.

6. The hair sample collection device of claim 5, wherein the hair collection well is a well structure that is open on one side; the hair collecting tank is composed of a lower surface of the carrier, an upper surface of the base and a connecting part of the carrier and the base; the connecting part of the carrier and the base is the surface of an arc structure; or the hair collecting tank is a detachable tank body, the shape of which is matched with the shape of an inner groove formed by the lower surface of the carrier, the upper surface of the base and the connecting part of the carrier and the base, and can be embedded in the inner groove.

7. The hair sample collection device of claim 6, wherein each piston structure is provided with a resilient member; when the cutting element of the hair cutting unit moves down the piston structure, the resilient element is compressed, and the hair can be cut off.

8. The hair sample collection device of claim 7, wherein the resilient element is a spring that fits over the piston cavity or over the piston; when the spring is sleeved on the piston cavity, the diameter of the spring is larger than the outer diameter of the piston cavity, and the length of the spring is larger than the length of the piston cavity; when the spring is sleeved on the piston, the diameter of the spring is larger than the diameter of the piston, smaller than the outer diameter of the piston cavity and larger or smaller than the inner diameter of the piston cavity.

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