Flexible sampling device

Abstract

The application discloses a flexible sampling device for extracting micro evidence in narrow spaces such as holes and slits, wherein the flexible sampling device comprises a flexible tube body and a sampling structure, wherein the outer diameter of the flexible tube body is suitable for extending into the narrow space, and the flexible tube body comprises a supporting layer body and a flexible layer body arranged on the peripheral surface of the supporting layer body; the strength of the supporting layer body is greater than that of the flexible layer body, and the toughness of the flexible layer body is greater than that of the supporting layer body; the sampling structure is arranged at one end of the length direction of the flexible tube body, and the sampling structure is configured to be capable of extracting micro evidence in the narrow space. According to the flexible sampling device of the embodiment of the application, the micro evidence in the narrow space such as the hole and the slit can be extracted, the flexible tube body can be suitable for being used in a complex environment and a winding sampling path, has good flexibility, is easy to bend, and is not easy to break.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of forensic science, and in particular to a flexible sampling device. BACKGROUND

[0002] With the development of modern science and technology, it is increasingly difficult to collect macroscopic physical evidence. Micro-physical evidence has the characteristics of high occurrence rate and strong concealment, and is not easy to forge. For physical evidence visible to the naked eye, extraction is relatively easy, and direct extraction method can be used to achieve extraction. However, it is very difficult to extract micro-physical evidence in slits and holes. Conventional extraction methods are blind and lack of purpose, and the physical evidence is often not fully extracted. There is currently no device to extract different types of micro-physical evidence in such scenarios. SUMMARY

[0003] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application provides a flexible sampling device, which can be used to extract micro-evidence in narrow spaces such as slits and holes.

[0004] The flexible sampling device according to the embodiments of the present application is used to extract micro-physical evidence in narrow spaces such as holes and slits. The flexible sampling device comprises a flexible tube body and a sampling structure. The outer diameter of the flexible tube body is suitable for extending into a narrow space, and the flexible tube body comprises a support layer body and a flexible layer body arranged on the outer periphery of the support layer body. The strength of the support layer body is greater than that of the flexible layer body, and the toughness of the flexible layer body is greater than that of the support layer body. The sampling structure is arranged at one end of the flexible tube body in the length direction, and the sampling structure is configured to extract micro-physical evidence in a narrow space.

[0005] The flexible sampling device according to the embodiments of the present application can achieve at least the following beneficial effects: the flexible tube body and the sampling structure arranged at one end thereof can be extended into a narrow hole or slit, and the sampling structure can extract micro-physical evidence such as fibers and hair in the area after being positioned. Further, the support layer body can provide strength to the flexible tube body, so that it can transmit a small deformation under remote operation and ensure the accuracy of entering a small bending environment. The flexible layer body can provide flexibility and bending properties to the flexible tube body, and can effectively improve the brittleness of the flexible tube body in cooperation with the support layer body, that is, the flexible tube body has soft and bendable properties, and can be used in complex and winding environments and sampling paths without being easily broken.

[0006] According to some embodiments of the present application, the flexible tube body further comprises a lubricating layer arranged on the outer periphery of the flexible layer body, and the friction coefficient of the outer surface of the lubricating layer is less than that of the outer surface of the flexible layer body.

[0007] According to some embodiments of the present application, the lubricating layer body is configured as a polytetrafluoroethylene tube.

[0008] According to some embodiments of the present application, the supporting layer body comprises a hollow quartz glass tube.

[0009] According to some embodiments of the present application, the flexible layer body comprises a polyimide layer body.

[0010] According to some embodiments of the present application, the hollow quartz glass tube and the polyimide layer body satisfy the following conditions: the inner diameter of the hollow quartz glass tube is selected from the range of 48 μm-52 μm, the outer diameter of the hollow quartz glass tube is selected from the range of 355 μm-375 μm, the thickness of the polyimide layer body is selected from the range of 20 μm-30 μm, the outer diameter of the polytetrafluoroethylene tube is 7 mm, and the wall thickness of the polytetrafluoroethylene tube is 1 mm.

[0011] According to some embodiments of the present application, the sampling structure is configured as a spiral rod, one end of the spiral rod is connected to one end of the flexible tube body in the length direction, the other end of the spiral rod spirally extends along the length direction of the flexible tube body and forms a gap for accommodating a trace evidence.

[0012] According to some embodiments of the present application, the spiral rod is configured as a magnetizable metal material.

[0013] According to some embodiments of the present application, the flexible sampling device further comprises a protective tube body, the protective tube body defines a cavity therein for movably placing the flexible tube body, and the length of the flexible tube body is greater than or equal to the length of the protective tube body.

[0014] According to some embodiments of the present application, the flexible sampling device further comprises a holding structure, the holding structure comprises a rotating handle arranged at one end of the flexible tube body away from the sampling device, and a hand holder arranged at one end of the protective tube body close to the rotating handle.

[0015] Additional aspects and advantages of the present application will be made apparent from the following description. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained according to the structures shown in the drawings without creative labor for those skilled in the art.

[0017] Figure 1A structural schematic diagram of a flexible tube body of a flexible sampling device according to an embodiment of the present application;

[0018] Figure 2 A structural schematic diagram of a flexible sampling device according to an embodiment of the present application.

[0019] BRIEF DESCRIPTION OF DRAWINGS

[0020]

[0021]

[0022] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments in conjunction with the accompanying drawings. DETAILED DESCRIPTION

[0023] The embodiments of the present application will be described in detail below with reference to the drawings, in which the same or similar components are denoted by the same or similar reference numerals throughout. The embodiments described below by reference to the drawings are exemplary and are for the purpose of explanation only, and are not to be understood as limiting the present application.

[0024] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified and limited.

[0025] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected. It can be mechanical connection, or electrical connection. It can be directly connected, or indirectly connected through an intermediate medium. It can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0026] In the present application, unless otherwise explicitly specified and limited, "on" or "under" of a first feature to a second feature can include that the first and second features are in direct contact, or can include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, "on", "above" and "over" of a first feature to a second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the first feature is higher in horizontal height than the second feature. "Under", "below" and "underneath" of a first feature to a second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the first feature is lower in horizontal height than the second feature.

[0027] The following disclosure provides many different embodiments, or examples, for implementing different structures of the present application. For the purpose of simplification, the components and arrangements of specific examples are described in the following disclosure. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeatedly refer to reference numerals and / or reference letters in different examples, and such repetition is for the purpose of simplification and clarity, which does not indicate the relationship between the various embodiments and / or arrangements discussed. In addition, the present application provides examples of various specific processes and materials, but those skilled in the art can realize the application of other processes and / or the use of other materials.

[0028] The present application discloses a flexible sampling device for extracting micro evidence in narrow spaces such as holes and slits, wherein the flexible sampling device comprises a flexible tube body and a sampling structure, wherein the outer diameter of the flexible tube body is suitable for extending into a narrow space; the sampling structure is arranged at one end of the length direction of the flexible tube body, and the outer diameter of the sampling structure is less than or equal to the outer diameter of the flexible tube body and is configured to be able to extract micro evidence in a narrow space, and the flexible tube body can be suitable for use in complex environments and tortuous sampling paths. The flexible sampling device of the embodiment of the present application overcomes the problems of small evidence, various types, difficult to operate in the environment, etc., realizes the extraction of small amount of fiber, hair, metal debris samples in different scenes such as slits and holes, and meets the needs of practical operations.

[0029] Reference is made below to Figure 1 and Figure 2 to describe a flexible sampling device 10 according to an embodiment of the present application.

[0030] Reference is made below to Figure 1 and Figure 2As shown, the flexible sampling device 10 according to the embodiment of the present application is used for extracting micro evidence in narrow spaces such as holes and slits, and comprises a flexible tube body 110 and a sampling structure 120. The outer diameter of the flexible tube body 110 is suitable for extending into the narrow space, and the flexible tube body 110 comprises a support layer body 111 and a flexible layer body 112 arranged on the outer circumferential surface of the support layer body 111. The strength of the support layer body 111 is greater than that of the flexible layer body 112, and the toughness of the flexible layer body 112 is greater than that of the support layer body 111. The sampling structure 120 is arranged at one end of the flexible tube body 110 in the length direction, and is configured to be capable of extracting micro evidence in the narrow space.

[0031] The flexible sampling device 10 according to the embodiment of the present application can achieve at least the following beneficial effects: the flexible tube body 110 and the sampling structure 120 arranged at one end thereof can be extended into narrow holes or slits, and the sampling structure 120 can extract micro evidence such as fibers and hairs in the region after being positioned. Further, the support layer body 111 can provide strength to the flexible tube body 110, so that the flexible tube body 110 can transmit micro deformation under remote operation and ensure the accuracy of entering the micro bending environment. The flexible layer body 112 can provide flexibility and bending to the flexible tube body 110, and cooperates with the support layer body 111 to effectively improve the brittleness of the flexible tube body 110, that is, the flexible sleeve has the characteristics of softness and easy bending, and can be used in complex and winding environments and sampling paths without being easily broken.

[0032] In the embodiment of the present application, the outer diameters of the flexible tube body 110 and the sampling structure 120 are suitable for extending into narrow spaces such as holes and slits. For example, according to the application scene and actual needs, the outer diameter of the flexible tube body 110 can be set to different size ranges to adapt to sampling regions of different sizes. For example, when it is needed to be applied to a hole with a hole diameter of 2 mm, a flexible tube body 110 with an outer diameter of 2 mm or less can be selected. Specifically, the outer diameter of the flexible tube body 110 can be 1.2 mm, 1 mm or 0.8 mm, etc. Of course, the outer diameter of the sampling structure 120 corresponds to the outer diameter of the flexible tube body 110.

[0033] It should be noted that in the embodiments of the present application, the support layer 111 is at least used for supporting, the flexible layer 112 is at least used for improving flexibility, the strength of the support layer 111 is greater than the strength of the flexible layer 112, and it can be understood that the strength of the support layer 111 is sufficient to meet the strength requirement of the flexible pipe body 110 extending into the narrow and tortuous space, that is, the support layer 111 has the advantage of high strength; similarly, the flexibility of the flexible layer 112 is greater than the flexibility of the support layer 111, and it can be understood that the flexibility of the flexible layer 112 can make the support layer 111 easy to bend and not easy to break, that is, the flexible layer 112 has the advantage of high flexibility, and in particular, when the support layer 111 is thin enough, the flexible layer 112 can avoid breaking.

[0034] It should be noted that after the sampling structure 120 extends into the sampling area, it can extract small evidence in the extraction area through its own structure and the control operation of the user. It can be thought that the sampling structure 120 is arranged to extract small evidence, and its specific structure can include various structures, as long as it can work in a narrow space, for example, the outer diameter of the sampling structure 120 is small enough to extend into the target area.

[0035] According to some embodiments of the present application, the flexible pipe body 110 further comprises a lubricating layer 113 arranged on the outer periphery of the flexible layer 112, and the friction coefficient of the outer surface of the lubricating layer 113 is less than the friction coefficient of the outer surface of the flexible layer 112.

[0036] In this way, it is convenient for the flexible pipe body 110 to penetrate into a narrow space.

[0037] It should be noted that the friction coefficient of the outer surface of the lubricating layer 113 is less than the friction coefficient of the outer surface of the flexible layer 112, and it can be understood that the friction coefficient of the outer surface of the lubricating layer 113 is small enough to smoothly enter the narrow space, that is, the lubricating layer 113 has the advantage of high lubricity. Further, in some embodiments, the flexible pipe body 110 can directly extend into a slit, a hole and the like, at this time, the lubricating layer 113 is used to reduce the friction with the wall of the slit or the hole. Further, in another embodiment, when the outer surface of the flexible pipe body 110 is further sleeved with another pipe body, the lubricating layer 113 is used to reduce the friction with the hole wall of the pipe body.

[0038] Similarly, it should be noted that when the flexible layer 112 itself has good lubricity, the lubricating layer 113 can not be arranged.

[0039] According to some embodiments of the present application, the lubricating layer 113 is configured as a tetrafluoroethylene tube.

[0040] Thus, the lubricating layer 113 can be used as a preferred embodiment.

[0041] Specifically, the PTFE tube has excellent chemical stability, and can resist strong acid, strong base, strong oxidizing agent, and organic solvents. The PTFE tube has a very low friction coefficient, and is a good antifriction and self-lubricating material. However, the design is not limited thereto, and in other embodiments, other materials can be used to replace the PTFE tube.

[0042] Further, the PTFE tube is hollow, and a via is formed in the PTFE tube for the pipe formed by the support layer 111 and the flexible layer 112 to pass through. The inner wall of the PTFE tube can also play a role in internal lubrication for the pipe, facilitating insertion and assembly.

[0043] It should be noted that, in the embodiments of the present application, the lubricating layer 113 and the flexible layer 112 can or can not have a gap therebetween, depending on the type and processing method of the lubricating layer 113 and the flexible layer 112. In some embodiments, the lubricating layer 113 and the flexible layer 112 preferably have a gap therebetween to facilitate assembly and disassembly.

[0044] According to some embodiments of the present application, the support layer 111 includes a hollow quartz glass tube.

[0045] Thus, the support layer 111 can be used as a preferred embodiment.

[0046] Specifically, the quartz glass material has very low thermal expansion, very high temperature resistance, excellent chemical stability, excellent electrical insulation, high strength, and can transmit small changes under long-distance operation of very fine materials, and has good rotation effect. However, the design is not limited thereto, and in other embodiments, other materials can be used to replace the support layer 111.

[0047] It should be noted that, when the support layer 111 is configured as a hollow quartz glass tube, the flexible layer 112 can provide the required flexibility for the support layer 111 because the hollow quartz glass tube is prone to breakage and is not easy to bend when the wire is very thin. Further, the flexible layer 112 is externally provided with the lubricating layer 113, which reduces the frictional force on the flexible pipe 110, and can avoid the support layer 111 from being broken during the process of being pushed into a narrow space.

[0048] According to some embodiments of the present application, the flexible layer 112 includes a polyimide layer.

[0049] Thus, the flexible layer 112 can be used as a preferred embodiment.

[0050] Specifically, the polyimide layer body has the advantages of high strength, bendable, extremely small coefficient of friction, and non-toxic, etc., so that the support tube body has the characteristics of soft and bendable, not easy to break, etc. while not changing the original advantages. Alternatively, when the flexible layer body 112 is configured as a polyimide layer body, it can be provided as a coating. However, the design is not limited thereto, and in other embodiments, the flexible layer body 112 can also include other materials.

[0051] In one embodiment, the inner diameter of the hollow quartz glass tube is selected from the range of 48 μm-52 μm, the outer diameter is selected from the range of 355 μm-375 μm, the thickness of the polyimide layer body is selected from the range of 20 μm-30 μm, the outer diameter of the tetrafluoroethylene tube is 7 mm, and the wall thickness is 1 mm. That is, the inner diameter of the hollow quartz glass tube can be 48 μm, 49 μm, 50 μm, 51 μm, 52 μm, or other values, the outer diameter of the hollow quartz glass tube can be 355 μm, 357 μm, 359 μm, 361 μm, 363 μm, 365 μm, 367 μm, 369 μm, 371 μm, 373 μm, 375 μm, or other values in the range of 355 μm-375 μm, the thickness of the polyimide layer body can be 20 μm, 21 μm, 22 μm, 23 μm, 24 μm, 30 μm, or other values in the range of 20 μm-30 μm, which are not particularly limited herein.

[0052] According to some embodiments of the present application, the sampling structure 120 is configured as a spiral rod, one end of the spiral rod is connected to one end of the flexible tube body 110 in the length direction, and the other end of the spiral rod extends spirally along the length direction of the flexible tube body 110 and is formed with a gap for accommodating the micro evidence.

[0053] In this way, the sampling structure 120 can extract the micro evidence in the target area.

[0054] Specifically, by rotating the flexible sampling sleeve to drive the spiral rod to rotate synchronously, the spiral rod arranged at the front end is rotated into the target sample (micro evidence) and fixes it in the gap of the spiral rod, and then the flexible sleeve and the spiral rod are pulled out, so that the target sample can be taken out, thereby realizing the extraction of the micro evidence. It should be noted that in the present embodiment, the size of the gap formed by the spiral rod can meet the winding of the micro evidence such as hair and fiber.

[0055] It can be understood that the micro evidence can be extracted by the screw rod, and the operation is simple and easy to implement. In some embodiments of the present application, the flexible tube body 110 is not easy to break and can transmit a long-distance micro rotation amount due to the support layer body 111, the flexible layer body 112 and the lubricating layer body 113, and the operation of extracting the micro evidence can be effectively performed in cooperation with the screw rod, especially when the support layer body 111 is configured as a hollow quartz glass tube, the flexible layer body 112 is configured as a polyimide layer body, and the lubricating layer body 113 is configured as a tetrafluoroethylene tube, the effect is better.

[0056] However, the design is not limited thereto, and in other embodiments, the sampling structure 120 can also be configured as other structures, including but not limited to a hook assembly and the like.

[0057] According to some embodiments of the present application, the screw rod is configured as a magnetizable metal material.

[0058] In this way, the screw rod can extract the micro evidence that can be magnetically attracted.

[0059] Specifically, when the screw rod is configured as iron, cobalt or nickel or the like, it can be magnetized to extract some micro evidence that can be magnetically attracted. Of course, in some embodiments, the screw rod can be directly made of a magnet.

[0060] According to some embodiments of the present application, the flexible sampling device 10 further comprises a protection tube body 140, and the protection tube body 140 defines a cavity for movably inserting the flexible tube body 110, and the length of the flexible tube body 110 is greater than or equal to the length of the protection tube body 140.

[0061] In this way, the micro evidence can be prevented from being damaged or falling off during the process of pulling out the sampling structure 120 from the sampling area after extracting the micro evidence.

[0062] Specifically, the flexible tube body 110 and the sampling structure 120 can be inserted into the cavity in the protection tube body 140, and then the protection tube body 140 with the flexible tube body 110 and the sampling structure 120 can be inserted into the sampling area. The flexible tube body 110 and the sampling structure 120 can move relative to the protection tube body 140, and the sampling structure 120 can be protruded into the sampling area by moving the flexible tube body 110, and then the sampling structure 120 can be used for sampling.

[0063] According to some embodiments of the present application, the flexible sampling device 10 further comprises a holding structure 150, and the holding structure 150 comprises a rotating handle 150a arranged at one end of the flexible tube body 110 away from the sampling device, and a hand-held device 150b arranged at one end of the protection tube body 140 close to the rotating handle 150a.

[0064] In this way, the user can easily hold and operate the flexible sampling device 10.

[0065] Specifically, the user can hold the handpiece 150b and move the protection tube 140 easily. Further, the user can rotate the handle to rotate the flexible tube 110.

[0066] Specifically, the user can hold the handpiece 150b and move the protection tube 140 easily. Further, the user can rotate the handle to rotate the flexible tube 110.

[0067] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the exemplary description of the above terms does not necessarily mean the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0068] Although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1.A flexible sampling device for extracting micro-evidence in a narrow space of a hole or a slit, the flexible sampling device comprising: a flexible tube body having an outer diameter suitable for being inserted into the narrow space, the flexible tube body comprising a support layer body and a flexible layer body disposed on an outer periphery of the support layer body, the support layer body having a strength greater than a strength of the flexible layer body, and the flexible layer body having a toughness greater than a toughness of the support layer body; and a sampling structure disposed at one end of the flexible tube body in a length direction of the flexible tube body, the sampling structure being configured to extract the micro-evidence in the narrow space. The sampling structure is configured as a helical rod, one end of the helical rod being connected to one end of the flexible tube body in the length direction of the flexible tube body, the other end of the helical rod being helically extended along the length direction of the flexible tube body and formed with a gap for accommodating the micro-evidence. The flexible sampling device further comprises a protective tube body, the protective tube body defining an inner cavity for movably receiving the flexible tube body, the length of the flexible tube body being greater than or equal to the length of the protective tube body. The flexible sampling device is rotated to drive the helical rod to rotate synchronously, the helical rod disposed at the front end is rotated into the micro-evidence and fixes the micro-evidence in the gap of the helical rod, and then the flexible tube body and the helical rod are pulled out, so that the micro-evidence can be taken out, thereby achieving the extraction of the micro-evidence, and the size of the gap formed by the helical rod can meet the requirement of rolling the hair and fiber micro-evidence. 2.The flexible sampling device according to claim 1, wherein the flexible tube body further comprises a lubricating layer body disposed on the outer periphery of the flexible layer body, the outer surface of the lubricating layer body having a friction coefficient less than that of the outer surface of the flexible layer body. 3.The flexible sampling device according to claim 2, wherein the lubricating layer body is configured as a tetrafluoroethylene tube. 4.The flexible sampling device according to claim 3, wherein the support layer body comprises a hollow quartz glass tube. 5.The flexible sampling device according to claim 4, wherein the flexible layer body comprises a polyimide layer body. 6.The flexible sampling device according to claim 5, wherein the hollow quartz glass tube and the polyimide layer body satisfy the following conditions: the inner diameter of the hollow quartz glass tube is selected from a range of 48μm-52μm, the outer diameter of the hollow quartz glass tube is selected from a range of 355μm-375μm, the thickness of the polyimide layer body is selected from a range of 20μm-30μm, the outer diameter of the tetrafluoroethylene tube is 7mm, and the wall thickness of the tetrafluoroethylene tube is 1mm. 7.The flexible sampling device according to claim 1, wherein the helical rod is configured as a magnetizable metal material. 8.The flexible sampling device according to claim 1, further comprising a holding structure, the holding structure comprising a rotating handle disposed at one end of the flexible tube body away from the sampling device, and a handgrip disposed at one end of the protective tube body close to the rotating handle. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​

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