Flexible device for displaying fingerprint

Abstract

The utility model provides a flexible device for showing fingerprints, which relates to the technical field of trace adjustment, and comprises a flexible silica gel cover, a rear side plate and an inner plate, the rear side plate is arranged below the flexible silica gel cover, the inner plate is arranged below the interior of the flexible silica gel cover and is connected with the rear side plate, a metal plate is arranged above the inner plate, and the metal plate is connected with the rear side plate. A fan is arranged at one end of the bottom of the metal plate, and a middle round hole is formed in the position, at the air exhaust end of the fan, of the metal plate. The flexible silica gel cover covers the position needing to be displayed, the steam generator is electrified and heated through program control to adjust the humidity in the closed area, then heat is transmitted to the corresponding area of the metal plate to the copper net through the heating plate, liquid alpha-ethyl cyanoacrylate on the copper net volatilizes, the fan blows air flow, and the humidity in the closed area is adjusted. The dense holes and the drilled holes are matched to circulate in the closed space, fingerprint showing is achieved, a fingerprint fuming cabinet is not needed, and on-site use is more convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of trace adjustment, in particular to a flexible device for displaying fingerprints. Background Art

[0002] During the crime scene investigation, it is necessary to visualize the fingerprints at the scene, such as by using optical visualization, physical visualization (such as powder visualization, iodine fumigation visualization, smoke visualization, vacuum coating visualization, etc.), chemical visualization and other technologies and methods, so that the latent fingerprint lines can be presented on the surface of the object for subsequent recording, extraction and comparison analysis.

[0003] In the prior art, the most commonly used method is to use ethyl α-cyanoacrylate to visualize fingerprints. This method requires a sealed box and a high temperature during operation. It is usually carried out in a fingerprint fumigation cabinet in a laboratory. However, the fingerprint fumigation cabinet is inconvenient to bring to the site for processing. Sometimes the area where the fingerprint is left on site is uneven, which makes it very troublesome to use ethyl α-cyanoacrylate to visualize the fingerprint. Therefore, the utility model proposes a flexible device for visualizing fingerprints to solve the problems existing in the prior art. Utility Model Content

[0004] In response to the above problems, the utility model proposes a flexible device for revealing fingerprints. The flexible device for revealing fingerprints is arranged at the position where fingerprints need to be revealed through a flexible silicone cover. First, the humidity in the enclosed area is adjusted by heating the steam generator, and then the heat is transferred to the corresponding area of the metal plate to the copper mesh through the heating plate, so that the liquid α-cyanoacrylate on the copper mesh is evaporated. The fan blows the air flow, and the dense holes and drilled holes are combined to circulate in the enclosed space to realize the visualization of fingerprints. There is no need for a fingerprint fumigation cabinet, and it is more convenient to use on site.

[0005] To achieve the purpose of the utility model, the utility model is implemented through the following technical solutions: a flexible device for revealing fingerprints, comprising a flexible silicone cover, a rear side plate and an inner plate, the rear side plate being arranged below the flexible silicone cover, the inner plate being arranged below the inside of the flexible silicone cover, and the inner plate being connected to the rear side plate, a metal plate being arranged above the inner plate, and a fan being arranged at one end of the bottom of the metal plate, a middle circular hole being arranged on the metal plate at the exhaust end of the fan, a heating plate being arranged at the end of the bottom of the metal plate away from the fan, and a copper mesh being arranged on the metal plate at a position above the heating plate, and a fingerprint revealing agent being dripped on the copper mesh; an isolation membrane being arranged between the copper mesh and the metal plate, and when α-ethyl cyanoacrylate is dripped into the copper mesh multiple times and then solidified, the isolation membrane is used to prevent the copper mesh from adhering to the metal plate, and is convenient for separation when the copper mesh is replaced;

[0006] Dense holes are provided in the middle of the metal plate, and drill holes are provided on both sides of the metal plate; a steam generator is embedded in the middle of the metal plate, and a highly water-absorbent solid is solidified in the metal cup of the steam generator, which has good water permeability. An electric heating ring is fixed on the outside of the metal cup, and the heating ring is glued and fixed to the metal plate with the metal cup of the steam generator. When in use, water droplets are dripped from the mouth of the steam generator, and the water penetrates into the solid of the steam generator and prevents the water from overflowing. An electronic controller is fixed in the inner plate, and the electronic controller starts the steam generator heating first through a program, and then starts the heating plate heating.

[0007] A further improvement is that a handle is provided at the bottom of the rear side panel, and the handle is integrally formed with the rear side panel.

[0008] A further improvement is that first screws are provided at the four corners inside the rear side panel, and the upper ends of the first screws pass through the flexible silicone cover and are fixed to the inner panel.

[0009] A further improvement is that second screws are provided at the four corners inside the metal plate, and nut tubes are provided at the four corners inside the inner plate, and the second screws are threadably matched with the nut tubes.

[0010] A further improvement is that third screws are installed on the metal plate at the four corners of the middle circular hole, and the fan is fixed by the third screws.

[0011] A further improvement is that LED lamp beads are provided on both sides of the metal plate.

[0012] A further improvement is that: a fixing plate is provided on the upper cover of the copper mesh, and third bolts are provided at the four corners of the fixing plate, and the fixing plate is fixed to the metal plate by the third bolts.

[0013] The beneficial effects of the utility model are:

[0014] 1. The utility model is set at the position where fingerprints need to be revealed through a flexible silicone cover. First, the humidity in the enclosed area is adjusted by heating the steam generator, and then the heat is transferred to the corresponding area of the metal plate and then to the copper mesh through the heating plate, so that the liquid α-ethyl cyanoacrylate on the copper mesh is volatilized. The fan blows the air flow, and the dense holes and drilled holes are combined to circulate in the enclosed space to realize the visualization of fingerprints. There is no need for a fingerprint fumigation cabinet, which is more convenient to use on site.

[0015] 2. The flexible silicone cover of the utility model can be deformed and bent to adhere to uneven surfaces, forming a closed environment, convenient for heating and air circulation to show fingerprints, with a wide range of applications. The flexible silicone cover can also be folded and put away for easy carrying. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is the main view of the utility model;

[0017] Figure 2 This is a schematic diagram of the disassembly of the utility model;

[0018] Figure 3 It is a side view schematic diagram of the utility model.

[0019] Among them: 1. Flexible silicone cover; 2. Rear side panel; 3. Inner panel; 4. Metal plate; 5. Fan; 6. Middle round hole; 7. Heating plate; 8. Copper mesh; 9. Dense holes; 10. Drilling; 11. Handle; 12. First screw; 13. Second screw; 14. Nut tube; 15. Third screw; 16. Fixing plate; 17. Third bolt; 18. LED lamp beads; 19. Electronic controller; 20. Steam generator. DETAILED DESCRIPTION

[0020] In order to deepen the understanding of the present invention, the present invention will be further described in detail below in conjunction with embodiments. The embodiments are only used to explain the present invention and do not constitute a limitation on the scope of protection of the present invention.

[0021] Example 1

[0022] according to Figure 1 、 2 As shown in Figures 3 and 4, this embodiment proposes a flexible device for revealing fingerprints, comprising a flexible silicone cover 1, a rear side plate 2, and an inner plate 3. The rear side plate 2 is provided below the flexible silicone cover 1, the inner plate 3 is provided below the inside of the flexible silicone cover 1, and the inner plate 3 is connected to the rear side plate 2. A metal plate 4 is provided above the inner plate 3, and a fan 5 is provided at one end of the bottom of the metal plate 4. A middle circular hole 6 is provided on the metal plate 4 at the exhaust end of the fan 5. A heating plate 7 is provided at one end of the bottom of the metal plate 4 away from the fan 5, and a copper mesh 8 is provided on the metal plate 4 above the heating plate 7, and a fingerprint revealing agent is dripped on the copper mesh 8.

[0023] A steam generator 20 is embedded in the middle of the metal plate 4. A highly water-absorbent solid is solidified in the metal cup of the steam generator 20. An electric heating ring is bonded and fixed to the outside of the metal cup. When in use, water is dripped from the mouth of the steam generator 20. The water seeps into the solid of the steam generator 20 and keeps it from overflowing.

[0024] The metal plate 4 is provided with a densely packed hole 9 in the middle, and drilled holes 10 are provided on both sides of the metal plate 4. During operation, the flexible silicone cover 1 is pressed against the surface with fingerprints and powered on. The control circuit first activates the steam generator, heating the metal cup to penetrate the solid moisture, causing the steam to evaporate into the flexible silicone cover 1. Power is then supplied to the heating plate 7, which first conducts heat to the corresponding area of the metal plate 4 and further transfers it to the copper mesh 8, causing the liquid α-cyanoacrylate on the copper mesh 8 to evaporate. A fan then blows air to circulate within the enclosed space, revealing the fingerprints. Multiple drilled holes 10 are distributed around the periphery of the metal plate 4, sealing the space when revealing the fingerprints. The drilled holes 10 and the path of the fan 5 form a circulation channel for the airflow. Thermally conductive adhesive secures the heating plate 7. Under the blowing of the fan 5, the α-cyanoacrylate mist fills the enclosed space and quickly reveals the sweat fingerprints. The densely packed holes 9 in the center slow the transfer of heat to the surrounding area, reducing the amount of heat transferred toward the fan 5.

[0025] A handle 11 is provided at the bottom of the rear side panel 2, and the handle 11 is integrally formed with the rear side panel 2, making it convenient to carry.

[0026] The four corners of the rear side panel 2 are each provided with a first screw 12, and the upper end of the first screw 12 passes through the flexible silicone cover 1 and is fixed to the inner panel 3. The first screw 12 is used to fix or remove the rear side panel 2 and the inner panel 3.

[0027] Second screws 13 are provided at the four corners of the metal plate 4, and nut tubes 14 are provided at the four corners of the inner plate 3. The second screws 13 and the nut tubes 14 are threadably matched. The second screws 13 and the nut tubes 14 facilitate the fixing and installation or removal of the metal plate 4 and the inner plate 3.

[0028] Third screws 15 are installed on the metal plate 4 at the four corners of the middle circular hole 6, and the fan 5 is fixed by the third screws 15. The third screws 15 facilitate the fixing and installation or removal of the fan 5.

[0029] The upper cover of the copper mesh 8 is provided with a fixing plate 16, and the four corners of the fixing plate 16 are provided with third bolts 17, and the fixing plate 16 is fixed to the metal plate 4 by the third bolts 17. When in use, the fixing plate 16 is fixed to the metal plate 4 by the third bolts 17 to press and fix the copper mesh 8.

[0030] Example 2

[0031] according to Figure 1 、 2As shown in Figures 3 and 4, this embodiment proposes a flexible device for revealing fingerprints, comprising a flexible silicone cover 1, a rear side plate 2, and an inner plate 3. The rear side plate 2 is provided below the flexible silicone cover 1, the inner plate 3 is provided below the inside of the flexible silicone cover 1, and the inner plate 3 is connected to the rear side plate 2. A metal plate 4 is provided above the inner plate 3, and a fan 5 is provided at one end of the bottom of the metal plate 4. A middle circular hole 6 is provided on the metal plate 4 at the exhaust end of the fan 5. A heating plate 7 is provided at one end of the bottom of the metal plate 4 away from the fan 5, and a copper mesh 8 is provided on the metal plate 4 above the heating plate 7, and a fingerprint revealing agent is dripped on the copper mesh 8.

[0032] There are dense holes 9 in the middle of the metal plate 4, and there are drill holes 10 on both sides of the metal plate 4. During operation, the flexible silicone cover 1 is pressed against the surface with fingerprints and powered on. The control circuit first connects the steam generator 20, and the external electric heating ring heats the water that has penetrated into the metal cup and evaporates it. The steam circulates in the flexible silicone cover 1 to adjust the humidity of the closed environment. Subsequently, the heating plate 7 is powered on again, and the heat is first transferred to the corresponding area of the metal plate 4, and further transferred to the copper mesh 8, so that the liquid α-cyanoacrylate on the copper mesh 8 evaporates. The fan blows the air flow to circulate in the closed space, realizing the visualization of the fingerprint. There are multiple drill holes 10 distributed around the metal plate 4. When the fingerprint is visualized, the space is closed, and the drill holes 10 and the path of the fan 5 form a circulation channel for the air flow. The heat conductive glue fixes the heating plate 7. Under the blowing of the fan 5, the α-ethyl cyanoacrylate aerosol fills the enclosed space and quickly reveals the sweat fingerprints. The dense holes 9 in the middle delay the transfer of heat to the periphery and reduce the heat transfer toward the fan 5.

[0033] A handle 11 is provided at the bottom of the rear side panel 2, and the handle 11 is integrally formed with the rear side panel 2, making it convenient to carry.

[0034] Both sides of the metal plate 4 are provided with LED lamp beads 18. There are two white LED lamp beads 18 on both sides of the metal plate 4 for observing the fingerprint appearance process.

[0035] The flexible device for revealing fingerprints is placed at the location where fingerprints need to be revealed through a flexible silicone cover 1. The electronic controller 19 first activates the steam generator 20 through a program to heat, allowing the water that has penetrated the metal cup to evaporate, adjusting the humidity of the closed environment. The heat is then transferred to the corresponding area of the metal plate 4 and then to the copper mesh 8 through the heating plate 7, allowing the liquid α-ethyl cyanoacrylate on the copper mesh 8 to evaporate. The fan 5 blows the airflow, which circulates in the closed space with the action of the dense holes 9 and the drilled holes 10 to reveal the fingerprints. This eliminates the need for a fingerprint fumigation cabinet and is more convenient for on-site use. The flexible silicone cover 1 of the present application can be deformed and bent to adhere to uneven surfaces, forming a closed environment, which is convenient for heating and air circulation to reveal fingerprints, and has a wide range of applications.

[0036] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. A flexible device for displaying fingerprints, comprising a flexible silicone cover (1), a rear side panel (2) and an inner panel (3), characterized in that: The rear side plate (2) is arranged below the flexible silicone cover (1), the inner plate (3) is arranged below the inside of the flexible silicone cover (1), and the inner plate (3) is connected to the rear side plate (2), a metal plate (4) is provided above the inner plate (3), and a fan (5) is provided at one end of the bottom of the metal plate (4), a middle circular hole (6) is provided on the metal plate (4) at the exhaust end of the fan (5), a heating plate (7) is provided at one end of the bottom of the metal plate (4) away from the fan (5), and a copper mesh (8) is provided on the metal plate (4) above the heating plate (7), and a fingerprint developer is dripped on the copper mesh (8); Dense holes (9) are provided at the middle position inside the metal plate (4), drill holes (10) are provided on both sides inside the metal plate (4), a steam generator (20) is embedded in the middle of the metal plate (4), and an electronic controller (19) is provided on the inner plate (3).

2. The flexible device for displaying fingerprints according to claim 1, characterized in that: A handle (11) is provided at the bottom of the rear side plate (2), and the handle (11) and the rear side plate (2) are integrally formed.

3. The flexible device for displaying fingerprints according to claim 2, characterized in that: First screws (12) are provided at the four corners inside the rear side panel (2), and the upper ends of the first screws (12) pass through the flexible silicone cover (1) and are fixed to the inner panel (3).

4. The flexible device for displaying fingerprints according to claim 1, characterized in that: Second screws (13) are provided at the four corners inside the metal plate (4), and nut tubes (14) are provided at the four corners inside the inner plate (3), and the second screws (13) are thread-matched with the nut tubes (14).

5. The flexible device for displaying fingerprints according to claim 1, characterized in that: Third screws (15) are installed on the metal plate (4) at the four corners of the middle circular hole (6), and the fan (5) is fixed by the third screws (15).

6. The flexible device for displaying fingerprints according to claim 1, characterized in that: LED lamp beads (18) are provided on both sides of the metal plate (4).

7. The flexible device for displaying fingerprints according to claim 1, characterized in that: A fixing plate (16) is provided above the copper mesh (8), and third bolts (17) are provided at the four corners of the fixing plate (16). The fixing plate (16) is fixed to the metal plate (4) via the third bolts (17).

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