CN113702086A

CN113702086A - Trace material evidence hole puncher

Info

Publication number: CN113702086A
Application number: CN202111050291.1A
Authority: CN
Inventors: 崔连义
Original assignee: Liaoning police college
Current assignee: Liaoning police college
Priority date: 2021-09-08
Filing date: 2021-09-08
Publication date: 2021-11-26
Anticipated expiration: 2041-09-08
Also published as: CN113702086B

Abstract

The invention provides a trace material evidence puncher, which comprises an air blowing pressure head, a spring I, a cylinder, a spring II, a rack, a punch, a magnetic pressing block, an anvil block, a conical tube and a reagent bottle, wherein the air blowing pressure head is connected with the spring I; the blowing pressure head is connected with a spring I, the spring I is arranged at the upper end of the cylinder body, and the spring I is limited by a cover with a hole arranged at the top of the cylinder body; the frame comprises an upper layer, a middle layer and a lower layer; the spring II is arranged on the upper layer structure of the rack through the mounting seat, the upper layer structure is provided with a through hole I, and the barrel extends into the spring II; the punch is fixedly arranged at the bottom of the cylinder body and is of a hollow structure; the anvil block is fixedly arranged on the middle layer structure of the frame, a through hole II is formed in the center of the anvil block, and the punch is positioned right above the through hole II; the magnetic pressing block is placed on the anvil block; the reagent bottle is placed on the lower layer structure of the rack below the anvil block, the opening position corresponds to the through hole II, and the conical tube is placed in the reagent bottle. The technical scheme of the invention solves the problems that the existing syringe type puncher has poor accuracy, a sampling part is easy to lose, is easy to pollute, is difficult to take out and the like when in use.

Description

Trace material evidence hole puncher

Technical Field

The invention relates to the technical field of criminal science, in particular to a micro material evidence puncher.

Background

In the prior art in the criminal science field, the extraction of material evidence such as ink on paper and printed and dyed materials mainly adopts a syringe type puncher, and the following problems exist in use:

1. the hand-held type, it is full manual, location is inaccurate when leading to the sample, and the randomness is big, the cutting accuracy is poor, and the success rate is not high.

2. The sample is pushed out by using a solid needle, and the sample is easy to be polluted and taken after being used repeatedly.

3. The sample is likely to stay in the pinhole of the punch and is difficult to take out.

4. Without a collecting device, the sampling volume is small, so the sampling device is easy to lose.

Disclosure of Invention

According to the technical problems that the existing syringe type puncher is poor in sampling accuracy, a sampling part is easy to lose, easy to pollute and difficult to take out when the existing syringe type puncher is used, and the micro material evidence puncher is provided. The invention is mainly used for analyzing and sampling trace components on physical evidence, samples of stamp-pad ink, printing ink, stains, dye and the like with the width of 0.5mm are extracted on paper, fabric and plastic by using the product, and the collection is completed so as to facilitate the component analysis of the next step.

The technical means adopted by the invention are as follows:

a micro material evidence puncher comprises an air blowing pressure head, a spring I, a cylinder body, a spring II, a rack, a punch, a magnetic pressing block, an anvil block, a conical tube and a reagent bottle;

the blowing pressure head is connected with the spring I, and the spring I is arranged at the upper end of the cylinder and is limited by a cover with a hole arranged at the top of the cylinder;

the frame comprises an upper layer, a middle layer and a lower layer structure;

the spring II is mounted on the upper layer structure of the rack through a mounting seat, the upper layer structure is provided with a through hole I, the barrel extends into the spring II and can penetrate through the through hole I to move up and down, and the diameter of the belt hole cover is larger than that of the mounting seat;

the punch is fixedly arranged at the bottom of the barrel and is of a hollow structure, and a small hole at the bottom of the punch is communicated with the hollow structure in the barrel; the anvil block is fixedly arranged on the middle layer structure of the rack, a through hole II is formed in the center of the anvil block, and the punch head is positioned right above the through hole II;

the magnetic pressing block is placed on the anvil block and used for pressing the sampled sample;

the reagent bottle is placed on the lower layer structure of the rack below the anvil block, the opening position of the reagent bottle corresponds to the through hole II, and the conical tube is placed in the reagent bottle.

Furthermore, the diameter of the small hole at the bottom of the punch is 0.2mm, and the diameter of the through hole II is 0.53 mm.

Further, the lower layer structure of the rack is provided with a fixing clamp for fixing the position of the reagent bottle.

Further, the anvil was made of YG6 high hardness alloy steel.

Further, the punch adopts a 440c stainless steel outer inclined edge hollow structure, and the outer diameter is 0.5 mm.

Compared with the prior art, the invention has the following advantages:

according to the trace physical evidence puncher provided by the invention, through the hollow punch and the through hole with the sharp edge arranged on the anvil block, a sample with an accurate size can be cut under the condition of generating the pressure as small as possible on a material sample to be detected; simultaneously, through set up the conical tube under the anvil block, the sample after accomplishing the blanking is blown and is fallen and collect in the conical tube, prevents that trace sample from losing, adopts the mode of blowing, and contactless sample avoids polluting.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is an explosion diagram of the structure of the micro evidence puncher disclosed by the invention.

Fig. 2 is a schematic structural diagram of the micro-evidence puncher disclosed by the invention.

In the figure: 1. a blowing pressure head; 2. a spring I; 3. a barrel; 4. a spring II; 5. a mounting seat; 6. a punch; 7. magnetic briquetting; 8. an anvil block; 9. a tapered tube; 10. a reagent bottle; 11. and a frame.

Detailed Description

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

To more clearly illustrate the objects, technical solutions and advantages of the embodiments of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. Any specific values in all examples shown and discussed herein are to be construed as exemplary only and not as limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are used for convenience of description and simplicity of description only, and in the absence of any contrary indication, these directional terms are not intended to indicate and imply that the device or element so referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore should not be considered as limiting the scope of the present invention: the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.

Example 1

As shown in fig. 1-2, the invention provides a micro material evidence puncher, which comprises an air blowing pressure head 1, a spring I2, a cylinder 3, a spring II 4, a frame 11, a punch 6, a magnetic pressing block 7, an anvil block 8, a conical tube 9 and a reagent bottle 10;

the blowing pressure head 1 is connected with the spring I2, and the spring I2 is arranged at the upper end of the cylinder 3 and is limited by a cover with a hole arranged at the top of the cylinder 3; the spring I2 is used for resetting the blowing pressure head 1, the blowing pressure head 1 generates air pressure, and a sample falls into the reagent bottle 10 under the air pressure;

the frame 11 comprises an upper layer, a middle layer and a lower layer;

the spring II 4 is mounted on the upper layer structure of the rack 11 through a mounting seat 5, the upper layer structure is provided with a through hole I, the barrel 3 extends into the spring II 4 and can penetrate through the through hole I to move up and down, and the diameter of the hole cover is larger than that of the mounting seat 5; the pressure of the spring II 4 is smaller than that of the spring I2, and the spring II is used for resetting the cylinder 3; when the barrel body 3 moves up and down, the mounting seat 5 can guide the barrel body 3, and the hole cover can limit the barrel body 3;

the punch 6 is fixedly arranged at the bottom of the barrel 3, the punch 6 is of a hollow structure, and a small hole at the bottom is communicated with the hollow structure in the barrel 3; the anvil block 8 is fixedly arranged on the middle layer structure of the frame 11, a through hole II is formed in the center of the anvil block 8, and the punch 6 is located right above the through hole II;

the magnetic pressing block 7 is placed on the anvil block 8 and used for pressing samples such as extracted paper; in sampling, aligning a sample to the punch 6, and tightly pressing and fixing the sample by using the magnetic pressing block 7 to prevent the sample from moving so as to ensure the accuracy of a sampling point;

the reagent bottle 10 is placed on the lower layer structure of the rack 11 below the anvil block 8, the opening position of the reagent bottle corresponds to the through hole II, and the conical tube 9 is placed in the reagent bottle.

Furthermore, the diameter of the small hole at the bottom of the punch 6 is 0.2mm, and the diameter of the through hole II is 0.53 mm.

Further, the lower layer structure of the rack 11 is provided with a fixing clamp for fixing the position of the reagent bottle 10, the conical tube 9 is placed on the fixing clamp before cutting and sampling, blanking is completed, and a sample is blown down to the conical tube 9 to prevent a trace sample from being lost.

Further, the anvil 8 is made of YG6 high hardness alloy steel.

Further, the punch 6 is of a 440c stainless steel outer inclined blade hollow structure, and the outer diameter is 0.5 mm.

Furthermore, the anvil block 8 is provided with the through hole II with a sharp edge, so that a sample with an accurate size can be cut under the condition of generating the pressure on the material sample as small as possible.

When the device is used, the position to be detected on a sampled sample is aligned to the punch 6, the sample is pressed by the magnetic pressing block 7, the cylinder 3 is pressed downwards by hand, the sample is cut by the punch 6, in order to ensure that the cut sample smoothly falls into the reagent bottle 10, the air blowing pressure head 1 is pressed downwards after blanking is finished, and thus a sampled material evidence (such as 0.5mm ink marks) falls into the conical tube 9 to finish sampling.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A micro material evidence puncher is characterized by comprising an air blowing pressure head, a spring I, a cylinder, a spring II, a rack, a punch, a magnetic pressing block, an anvil block, a conical tube and a reagent bottle;

the frame comprises an upper layer, a middle layer and a lower layer structure;

2. The micro material evidence punch according to claim 1, wherein the diameter of the small hole at the bottom of the punch is 0.2mm, and the diameter of the through hole ii is 0.53 mm.

3. The micro material evidence punch according to claim 1, wherein the rack infrastructure is provided with a fixing clamp for fixing the position of the reagent bottle.

4. The micro material evidence punch of claim 1, wherein the anvil is made of YG6 high hardness alloy steel.

5. The micro material evidence punch according to claim 1, wherein the punch is a 440c stainless steel hollow structure with an outer beveled edge and an outer diameter of 0.5 mm.