On-site trace material evidence storage structure for judicial expertise

Abstract

The invention discloses an on-site trace material evidence preservation structure for judicial expertise, which is applied to the technical field of trace material evidence preservation, and can support and limit a limiting assembly and a guide assembly by arranging a limiting mechanism and a frame assembly, and can be put into a vacuum mechanism, so that the limiting assembly is vacuumized by the vacuum mechanism, and the safety of the storage structure is improved. The limiting assembly can store the trace evidences needing to be stored, meanwhile, the trace evidences can be limited when a vacuum environment is formed in the limiting assembly, the trace evidences are prevented from colliding with the interior of the frame assembly due to external force, and the guiding assembly can guide the trace evidences to be stored when the interior of the limiting assembly is vacuumized through the vacuum mechanism. The movement of the limiting assembly is limited, the closing assembly can be closed to be opened conveniently when the trace evidences need to be taken out, and the opening assembly can convey external air into the frame assembly so that the trace evidences in the frame assembly can be taken out conveniently.

Description

Technical Field

[0001] The invention belongs to the technical field of trace evidence preservation, and in particular relates to an on-site trace evidence preservation structure for judicial identification. Background Art

[0002] Forensic identification refers to the activity in which the appraiser uses scientific technology or specialized knowledge to identify and judge the specialized issues involved in the litigation and provide appraisal opinions during the litigation activities. Forensic identification institutions engaged in forensic evidence, forensic toxicology, trace evidence, and environmental damage identification must have a certified and accredited testing laboratory. The on-site trace evidence refers to all small and microscopic substances left behind by criminals at the scene or taken away from the scene during the commission of the crime, which can be used to reveal and confirm the criminal behavior or provide clues and scope for the investigation and solving of the case, and can prove the true situation of the case. It has the characteristics of small size, light weight, relatively concealed, difficult to detect, and difficult to destroy. The preservation of on-site trace evidence requires special on-site trace evidence preservation equipment.

[0003] The existing on-site trace evidence preservation structure used for forensic identification has the following disadvantages when used:

[0004] 1. It is impossible to quickly store trace evidence in a vacuum environment, and it is impossible to ensure that trace evidence will not be damaged by oxidation during storage;

[0005] 2. The lack of a limiting structure for trace evidence may cause the trace evidence to collide and be damaged in the storage device due to external forces. Summary of the invention

[0006] The purpose of the present invention is to provide an existing on-site trace evidence preservation structure for judicial identification, which has the following advantages:

[0007] 1. Trace evidence can be quickly stored in a vacuum environment to ensure that the trace evidence is not damaged by oxidation during storage;

[0008] 2. It has a limiting structure for trace evidence, which will prevent trace evidence from being damaged by collision in the storage device due to external force.

[0009] The above technical objectives of the present invention are achieved through the following technical solutions: A field trace evidence preservation structure for forensic identification, comprising a vacuum mechanism and a limiting mechanism, the limiting mechanism being clamped on the inner side of the vacuum mechanism, the vacuum mechanism comprising an installation assembly, an air supply assembly, an air extraction assembly and a control assembly, the air supply assembly is connected to the rear side of the installation assembly, the air extraction assembly is bolted to the rear side of the installation assembly, the air extraction assembly is connected to the air supply assembly, the control assembly is bolted to the rear side of the air extraction assembly, the limiting mechanism comprises a frame assembly, a limiting assembly, a guide assembly, a closing assembly and an opening assembly, the frame assembly is clamped on the inner side of the installation assembly, the limiting assembly is arranged on the inner side of the frame assembly, the guide assembly is bolted to both sides of the front side and both sides of the rear side of the limiting assembly, the closing assembly is clamped on the top of the frame assembly, and the opening assembly is clamped on the top of the closing assembly.

[0010] By adopting the above technical solution, a vacuum mechanism and a limiting mechanism are set up. The vacuum mechanism can evacuate the interior of the limiting mechanism to facilitate vacuum preservation of trace evidence. The limiting mechanism can limit the trace evidence after the interior is evacuated to avoid accidental collision of the trace evidence due to external force.

[0011] The present invention is further configured as follows: the installation assembly includes a supporting bottom shell, a limiting groove and a sealing ring, the limiting groove is opened at the top of the supporting bottom shell, and the sealing ring is bolted to the top of the inner side of the limiting groove.

[0012] By adopting the above technical solution, by setting up the installation component, the supporting bottom shell can support the limiting mechanism and the air supply component, the limiting groove can limit the limiting mechanism, and the sealing ring can increase the airtightness when the limiting groove contacts the limiting mechanism.

[0013] The present invention is further configured as follows: the air supply assembly includes a side air supply pipe, a main air supply pipe and a sealing ring, the side air supply pipe is connected on both sides of the front side of the supporting bottom shell, the main air supply pipe is connected on the front side of the supporting bottom shell, and the sealing ring is clamped on the side of the side air supply pipe away from the supporting bottom shell and the side of the main air supply pipe away from the supporting bottom shell.

[0014] By adopting the above technical solution and setting up an air supply assembly, the side air supply pipe can transport the air of the limiting mechanism in the limiting grooves on both sides of the supporting bottom shell to the exhaust assembly, and the main air supply pipe can transport the air of the limiting mechanism in the limiting grooves in the middle part of the supporting bottom shell to the exhaust assembly. The sealing ring can increase the stability of the side air supply pipe and the main air supply pipe when transporting air.

[0015] The present invention is further configured as follows: the vacuum extraction component includes a connecting shell, a miniature vacuum pump and a protective net, the connecting shell is bolted to the front side of the supporting bottom shell, the miniature vacuum pump is bolted to the inner side of the connecting shell, and the protective net is bolted to the top of the miniature vacuum pump.

[0016] By adopting the above technical solution, through setting up the vacuum assembly, the connecting shell can support and limit the micro vacuum pump and the control assembly. After the micro vacuum pump is powered on and started, the air in the side air supply pipe and the main air supply pipe can be extracted until the limiting mechanism becomes a vacuum. The protective net can protect the micro vacuum pump and increase the safety of the micro vacuum pump when in use.

[0017] The present invention is further configured as follows: the control component includes a supporting shell, a control panel and an air control valve, the supporting shell is bolted to the front side of the connecting shell, the control panel is bolted to the front side of the supporting shell, the air control valve is bolted to both sides of the supporting shell and the rear side of the supporting shell, the air control valve is connected to the side air supply pipe and the main air supply pipe, and the side of the air control valve close to the micro vacuum pump is connected to the micro vacuum pump.

[0018] By adopting the above technical solution, through setting up the control component, the supporting shell can support and limit the control panel and the air control valve. The control panel can facilitate the user to control the air control valve. The air control valve can control the opening and closing of the side air supply pipe and the main air supply pipe respectively, which is convenient for vacuuming the specified limiting mechanism, thereby increasing the flexibility of the vacuum operation of the limiting mechanism.

[0019] The present invention is further configured as follows: the frame assembly includes a connecting frame, a limiting slide groove and an observation window, the connecting frame is clamped on the inner side of the limiting slide groove, the limiting slide groove is opened on the front and rear sides of the inner side of the connecting frame, and the observation window is bolted on both sides of the connecting frame.

[0020] By adopting the above technical solution, through setting up the frame assembly, the connecting frame can support and limit the closing assembly and store trace evidence at the same time, the limiting slide groove can support and limit the guiding assembly, and the observation window can facilitate the user to observe the trace evidence stored in the connecting frame.

[0021] The present invention is further configured as follows: the limiting assembly includes a supporting frame plate, a transparent film and a folding film, the supporting frame plate is arranged on the inner side of the connecting frame, the transparent film is fixedly connected to both sides of the supporting frame plate, and the folding film is fixedly connected to the front and rear sides of the supporting frame plate.

[0022] By adopting the above technical solution, through setting the limiting component, the supporting frame plate can support and limit the transparent film and the folding film. At the same time, when the air is extracted, the transparent film can be gradually fitted along the guiding component to clamp and limit the trace evidence, and the vacuum environment can be maintained between the transparent films. The transparent film can limit the trace evidence while being transparent, which is convenient for users to observe the situation of the trace evidence. The folding film can gradually shrink as the supporting frame plate is closed, so as to maintain the vacuum environment in the transparent film.

[0023] The present invention is further configured as follows: the guide assembly includes a limit sliding rod, a connecting hole and an encryption ring, the limit sliding rod is bolted to both sides of the front and rear sides of the supporting frame plate, the side of the limit sliding rod away from the supporting frame plate is slidably connected to the inner side of the limit sliding groove, the connecting hole is opened at the bottom of the front side of the folding film, and the encryption ring is clamped on the inner side of the connecting hole.

[0024] By adopting the above technical solution, through setting up a guide component, the limiting slide rod can limit the supporting frame plate, and can gradually move inward along the limiting slide groove as the air is extracted. When the air is extracted, negative pressure will be generated between the transparent films and gradually close. The connecting hole can facilitate the vacuum mechanism to extract the air in the transparent film, so that a vacuum is formed in the transparent film, and the encryption ring can increase the airtightness of the connecting hole when the air is extracted.

[0025] The present invention is further configured as follows: the closing component includes a square cover, an encryption ring and a limit sleeve, the square cover is clamped on the top of the supporting bottom shell, the encryption ring is clamped on the bottom of the square cover, the bottom of the encryption ring contacts the top of the supporting bottom shell, the limit sleeve is bolted to the bottom of the square cover, and the bottom of the limit sleeve contacts the top of the supporting frame plate.

[0026] By adopting the above technical solution, through setting up a closing component, the square cover can close the top of the connecting frame, the encryption ring can increase the airtightness when the square cover and the connecting frame are closed, and the limit sleeve can limit the top of the supporting frame plate to increase the stability of the supporting frame plate when it is evacuated into a vacuum.

[0027] The present invention is further configured as follows: the opening component includes an air blocking cover, a fitting groove and a vent hole, the fitting groove is opened on the top of the square cover, the air blocking cover is rotatably connected to the inner side of the fitting groove, the vent hole is opened on the inner side of the fitting groove, and the top of the vent hole is clamped with the bottom of the air blocking cover.

[0028] By adopting the above technical solution, through setting the opening component, the fitting groove can limit the opening and closing of the air blocking cover, the air blocking cover can open and close the vent hole, and the vent hole can transport outside air into the transparent film when trace evidence needs to be taken out, thereby releasing the vacuum environment in the transparent film.

[0029] In summary, the present invention has the following beneficial effects:

[0030] 1. By setting up a vacuum mechanism, the installation component can support and limit the limit mechanism, the air supply component can facilitate the air extraction component to extract the air in the limit mechanism, and the air extraction component can extract the air in the limit mechanism to form a vacuum environment inside the limit mechanism, so as to facilitate the vacuum preservation of trace evidence. The control component can facilitate the user to control the air extraction component, so that the user can control the vacuum environment of each limit mechanism in the installation component;

[0031] 2. By setting a limiting mechanism, the frame assembly can support and limit the limiting assembly and the guiding assembly, and can be placed in the vacuum mechanism at the same time, so that the vacuum mechanism can evacuate the limiting assembly into a vacuum. The limiting assembly can store the trace evidence that needs to be preserved, and can limit the trace evidence when a vacuum environment is formed inside the limiting assembly to prevent the trace evidence from colliding with the inside of the frame assembly due to external force. The guiding assembly can limit the movement of the limiting assembly when the vacuum mechanism evacuates the inside of the limiting assembly into a vacuum. The closing assembly can be closed to facilitate opening when the trace evidence needs to be taken out, and the opening assembly can convey external air into the frame assembly to facilitate the removal of the trace evidence in the frame assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0033] Figure 2 It is a schematic diagram of the vacuum mechanism structure of the present invention;

[0034] Figure 3 It is a schematic diagram of the structure of the air supply assembly and the installation assembly of the present invention;

[0035] Figure 4 It is a schematic diagram of the structure of the control component and the air extraction component of the present invention;

[0036] Figure 5 It is a schematic diagram of the structure of the limiting mechanism of the present invention;

[0037] Figure 6 It is a schematic diagram of the structure of the frame assembly of the present invention;

[0038] Figure 7 It is a schematic diagram of the structure of the limit assembly of the present invention;

[0039] Figure 8 It is a schematic diagram of the structure of the guide assembly of the present invention;

[0040] Fig. 9 It is a schematic diagram of the structure of the closing component and the opening component of the present invention.

[0041] Reference numerals: 1. vacuum mechanism; 101. mounting assembly; 1011. supporting bottom shell; 1012. limiting groove; 1013. sealing ring; 102. air supply assembly; 1021. side air supply pipe; 1022. main air supply pipe; 1023. sealing ring; 103. air extraction assembly; 1031. connecting shell; 1032. micro vacuum pump; 1033. protective net; 104. control assembly; 1041. supporting shell; 1042. control panel; 1043. air control valve; 2. limiting mechanism; 201. frame assembly Parts; 2011, connecting frame; 2012, limiting slide groove; 2013, observation window; 202, limiting assembly; 2021, supporting frame plate; 2022, transparent film; 2023, folding film; 203, guiding assembly; 2031, limiting slide rod; 2032, connecting hole; 2033, encryption ring; 204, closing assembly; 2041, square cover; 2042, encryption ring; 2043, limiting sleeve; 205, opening assembly; 2051, air blocking cover; 2052, fitting groove; 2053, vent. DETAILED DESCRIPTION

[0042] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0043] Embodiment 1:

[0044] refer to Figure 1-4 , a structure for preserving trace evidence on site for judicial identification, comprising a vacuum mechanism 1, the vacuum mechanism 1 comprising a mounting assembly 101, an air supply assembly 102, an air extraction assembly 103 and a control assembly 104, the air supply assembly 102 is connected to the rear side of the mounting assembly 101, the air extraction assembly 103 is bolted to the rear side of the mounting assembly 101, the air extraction assembly 103 is connected to the air supply assembly 102, the control assembly 104 is bolted to the rear side of the air extraction assembly 103, by setting the vacuum mechanism 1, the mounting assembly 101 can support and limit the limiting mechanism 2, the air supply assembly 102 can facilitate the air extraction assembly 103 to extract the air in the limiting mechanism 2, the air extraction assembly 103 can extract the air in the limiting mechanism 2, so that a vacuum environment is formed inside the limiting mechanism 2, so as to facilitate the vacuum preservation of trace evidence, the control assembly 104 can facilitate the user to control the air extraction assembly 103, and facilitate the user to control the vacuum environment in each limiting mechanism 2 in the mounting assembly 101.

[0045] like Figure 3As shown, the installation component 101 includes a supporting bottom shell 1011, a limiting groove 1012 and a sealing ring 1013. The limiting groove 1012 is opened at the top of the supporting bottom shell 1011, and the sealing ring 1013 is bolted to the top of the inner side of the limiting groove 1012. By setting the installation component 101, the supporting bottom shell 1011 can support the limiting mechanism 2 and the air supply component 102, the limiting groove 1012 can limit the limiting mechanism 2, and the sealing ring 1013 can increase the airtightness when the limiting groove 1012 contacts the limiting mechanism 2.

[0046] like Figure 3 As shown, the air supply component 102 includes a side air supply pipe 1021, a main air supply pipe 1022 and a sealing ring 1023. The side air supply pipe 1021 is connected to both sides of the front side of the supporting bottom shell 1011, the main air supply pipe 1022 is connected to the front side of the supporting bottom shell 1011, and the sealing ring 1023 is clamped on the side of the side air supply pipe 1021 away from the supporting bottom shell 1011 and the side of the main air supply pipe 1022 away from the supporting bottom shell 1011. By setting the air supply component 102, the side air supply pipe 1021 can transport the air of the limiting mechanism 2 in the limiting grooves 1012 on both sides of the supporting bottom shell 1011 to the exhaust component 103, and the main air supply pipe 1022 can transport the air of the limiting mechanism 2 in the limiting grooves 1012 in the middle of the supporting bottom shell 1011 to the exhaust component 103. The sealing ring 1023 can increase the stability of the side air supply pipe 1021 and the main air supply pipe 1022 when transporting air.

[0047] like Figure 4 As shown, the vacuum assembly 103 includes a connecting shell 1031, a micro vacuum pump 1032 and a protective net 1033. The connecting shell 1031 is bolted to the front side of the supporting bottom shell 1011, the micro vacuum pump 1032 is bolted to the inner side of the connecting shell 1031, and the protective net 1033 is bolted to the top of the micro vacuum pump 1032. By setting the vacuum assembly 103, the connecting shell 1031 can support and limit the micro vacuum pump 1032 and the control assembly 104. After power-on and startup, the micro vacuum pump 1032 can extract the air in the side air supply pipe 1021 and the main air supply pipe 1022 until the limiting mechanism 2 becomes a vacuum. The protective net 1033 can protect the micro vacuum pump 1032, thereby increasing the safety of the micro vacuum pump 1032 when in use.

[0048] like Figure 4As shown, the control assembly 104 includes a supporting shell 1041, a control panel 1042 and an air control valve 1043. The supporting shell 1041 is bolted to the front side of the connecting shell 1031, the control panel 1042 is bolted to the front side of the supporting shell 1041, the air control valve 1043 is bolted to both sides of the supporting shell 1041 and the rear side of the supporting shell 1041, the air control valve 1043 is connected to the side air supply pipe 1021 and the main air supply pipe 1022, and the air control valve 1043 is close to one side of the micro vacuum pump 1032. The side is connected to the micro vacuum pump 1032, and by setting the control component 104, the supporting shell 1041 can support and limit the control panel 1042 and the air control valve 1043, the control panel 1042 can be convenient for the user to control the air control valve 1043, the air control valve 1043 can respectively control the opening and closing of the side air supply pipe 1021 and the main air supply pipe 1022, so as to facilitate the vacuuming of the designated limiting mechanism 2, thereby increasing the flexibility of the vacuuming operation of the limiting mechanism 2.

[0049] Brief description of the usage process: First, place the limiting mechanism 2 into the limiting groove 1012, then power on and start the vacuum mechanism 1, the user controls the control panel 1042, turns on the micro vacuum pump 1032 and the required air control valve 1043, the micro vacuum pump 1032 will pump the air in the limiting mechanism 2 to the side air supply pipe 1021 and the main air supply pipe 1022, the main air supply pipe 1022 and the side air supply pipe 1021 will pump the air to the air control valve 1043, the air control valve 1043 will transport the air to the micro vacuum pump 1032, the micro vacuum pump 1032 will then discharge the air until a vacuum is formed in the limiting mechanism 2.

[0050] Embodiment 2:

[0051] refer to Figure 5-9A structure for preserving trace physical evidence on the scene for judicial identification includes a limiting mechanism 2, which is clamped on the inner side of a vacuum mechanism 1. The limiting mechanism 2 includes a frame component 201, a limiting component 202, a guide component 203, a closing component 204 and an opening component 205. The frame component 201 is clamped on the inner side of a mounting component 101, the limiting component 202 is arranged on the inner side of the frame component 201, the guide component 203 is bolted to both sides of the front side and both sides of the rear side of the limiting component 202, the closing component 204 is clamped on the top of the frame component 201, and the opening component 205 is clamped on the top of the closing component 204. By setting the limiting mechanism 2, the frame component 201 can support the limiting component 202 and the guide component 203. The support and limiter can be placed in the vacuum mechanism 1 at the same time, so that the vacuum mechanism 1 can evacuate the limiting component 202 into a vacuum. The limiting component 202 can store the trace evidence that needs to be preserved, and at the same time, when a vacuum environment is formed inside the limiting component 202, the trace evidence can be limited to avoid the trace evidence from colliding with the inside of the frame component 201 due to external force. The guide component 203 can limit the movement of the limiting component 202 when the vacuum mechanism 1 evacuates the inside of the limiting component 202 into a vacuum. The closing component 204 can be closed to facilitate opening when the trace evidence needs to be taken out. The opening component 205 can transport external air into the frame component 201 to facilitate taking out the trace evidence in the frame component 201.

[0052] like Figure 6 As shown, the frame assembly 201 includes a connecting frame 2011, a limiting slide groove 2012 and an observation window 2013. The connecting frame 2011 is clamped on the inner side of the limiting groove 1012. The limiting slide groove 2012 is opened on the front and rear sides of the inner side of the connecting frame 2011. The observation window 2013 is bolted on both sides of the connecting frame 2011. By setting the frame assembly 201, the connecting frame 2011 can support and limit the closing assembly 204 and store trace evidence at the same time. The limiting slide groove 2012 can support and limit the guiding assembly 203. The observation window 2013 can facilitate the user to observe the trace evidence stored in the connecting frame 2011.

[0053] like Figure 7As shown, the limiting component 202 includes a supporting frame plate 2021, a transparent film 2022 and a folding film 2023. The supporting frame plate 2021 is arranged on the inner side of the connecting frame 2011, the transparent film 2022 is fixedly connected to both sides of the supporting frame plate 2021, and the folding film 2023 is fixedly connected to the front and rear sides of the supporting frame plate 2021. By setting the limiting component 202, the supporting frame plate 2021 can support and limit the transparent film 2022 and the folding film 2023. At the same time, when the air is extracted, the transparent film 2022 can be gradually fitted along the guide component 203 to clamp and limit the trace evidence, and the vacuum environment is maintained between the transparent films 2022. The transparent film 2022 can limit the trace evidence while being transparent, which is convenient for users to observe the situation of the trace evidence. The folding film 2023 can gradually shrink as the supporting frame plate 2021 is closed, so as to maintain the vacuum environment in the transparent film 2022.

[0054] like Figure 8 As shown, the guide assembly 203 includes a limit slide bar 2031, a connecting hole 2032 and an encryption ring 2033. The limit slide bar 2031 is bolted to both sides of the front and rear sides of the support frame plate 2021. The side of the limit slide bar 2031 away from the support frame plate 2021 is slidably connected to the inner side of the limit slide groove 2012. The connecting hole 2032 is opened at the bottom of the front side of the folding film 2023. The encryption ring 2033 is clamped on the inner side of the connecting hole 2032. By setting the guide assembly 203, the limiting slide bar 2031 can limit the supporting frame plate 2021, and can gradually move inward along the limiting slide groove 2012 as the air is extracted. When the air is extracted, negative pressure will be generated between the transparent films 2022 and gradually close. The connecting hole 2032 can facilitate the vacuum mechanism 1 to extract the air in the transparent film 2022, so that a vacuum is formed in the transparent film 2022. The encryption ring 2033 can increase the airtightness of the connecting hole 2032 when the air is extracted.

[0055] like Fig. 9 As shown, the closing component 204 includes a square cover 2041, an encryption ring 2042 and a limiting sleeve 2043. The square cover 2041 is clamped on the top of the supporting bottom shell 1011, the encryption ring 2042 is clamped on the bottom of the square cover 2041, the bottom of the encryption ring 2042 is in contact with the top of the supporting bottom shell 1011, the limiting sleeve 2043 is bolted to the bottom of the square cover 2041, and the bottom of the limiting sleeve 2043 is in contact with the top of the supporting frame plate 2021. By setting the closing component 204, the square cover 2041 can close the top of the connecting frame 2011, the encryption ring 2042 can increase the airtightness when the square cover 2041 and the connecting frame 2011 are closed, and the limiting sleeve 2043 can limit the top of the supporting frame plate 2021 to increase the stability of the supporting frame plate 2021 when it is evacuated to a vacuum.

[0056] like Fig. 9 As shown, the opening component 205 includes an air blocking cover 2051, a fitting groove 2052 and a vent 2053. The fitting groove 2052 is provided at the top of the square cover 2041, the air blocking cover 2051 is rotatably connected to the inner side of the fitting groove 2052, the vent 2053 is provided at the inner side of the fitting groove 2052, and the top of the vent 2053 is snap-fitted with the bottom of the air blocking cover 2051. By setting the opening component 205, the fitting groove 2052 can limit the opening and closing of the air blocking cover 2051, the air blocking cover 2051 can open and close the vent 2053, and the vent 2053 can transport outside air into the transparent film 2022 when it is necessary to take out trace evidence, so as to release the vacuum environment in the transparent film 2022.

[0057] Brief description of the use process: First, place the trace evidence to be preserved in the transparent film 2022, then place the connecting frame 2011 containing the trace evidence inside the vacuum mechanism 1, and then close the square cover 2041 on the top of the connecting frame 2011. Then the vacuum mechanism 1 will extract the air in the transparent film 2022 from the connecting hole 2032. When the air is extracted, the limiting slide bar 2031 will drive the transparent film 2022 to gradually move inward on the limiting slide groove 2012. The transparent film 2022 will be vacuumed due to the internal vacuum. The negative pressure of the air gradually wraps the trace evidence until it is completely limited. The trace evidence will be in a vacuum environment, thereby completing the preservation of the trace evidence. The user can observe the situation of the trace evidence in real time through the observation window 2013. When it is necessary to take out the trace evidence, the air blocking cover 2051 is opened from the vent hole 2053 to allow air to enter the transparent film 2022. After the vacuum environment in the transparent film 2022 is released, the placing cover 2041 is opened from the connecting frame 2011, and then the trace evidence can be taken out.

[0058] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. A structure for preserving trace physical evidence on site for judicial identification, comprising a vacuum mechanism (1) and a limit mechanism (2), characterized in that: The limiting mechanism (2) is clamped on the inner side of the vacuum mechanism (1); the vacuum mechanism (1) comprises a mounting assembly (101), an air supply assembly (102), an air extraction assembly (103) and a control assembly (104); the air supply assembly (102) is connected to the rear side of the mounting assembly (101); the air extraction assembly (103) is bolted to the rear side of the mounting assembly (101); the air extraction assembly (103) is connected to the air supply assembly (102); the control assembly (104) is bolted to the rear side of the air extraction assembly (103); the limiting mechanism (2) comprises a frame The invention relates to a frame assembly (201), a limit assembly (202), a guide assembly (203), a closing assembly (204) and an opening assembly (205), wherein the frame assembly (201) is clamped on the inner side of the mounting assembly (101), the limit assembly (202) is arranged on the inner side of the frame assembly (201), the guide assembly (203) is bolted on both sides of the front side and both sides of the rear side of the limit assembly (202), the closing assembly (204) is clamped on the top of the frame assembly (201), and the opening assembly (205) is clamped on the top of the closing assembly (204).

2. The on-site trace evidence preservation structure for judicial identification according to claim 1, characterized in that: The mounting assembly (101) comprises a supporting bottom shell (1011), a limiting groove (1012) and a sealing ring (1013); the limiting groove (1012) is opened at the top of the supporting bottom shell (1011); and the sealing ring (1013) is bolted to the top of the inner side of the limiting groove (1012).

3. The on-site trace evidence preservation structure for judicial identification according to claim 2, characterized in that: The air supply assembly (102) comprises a side air supply pipe (1021), a main air supply pipe (1022) and a sealing ring (1023); the side air supply pipe (1021) is connected to both sides of the front side of the supporting bottom shell (1011); the main air supply pipe (1022) is connected to the front side of the supporting bottom shell (1011); and the sealing ring (1023) is clamped on a side of the side air supply pipe (1021) away from the supporting bottom shell (1011) and a side of the main air supply pipe (1022) away from the supporting bottom shell (1011).

4. The on-site trace evidence preservation structure for judicial identification according to claim 3 is characterized in that: The vacuum assembly (103) includes a connecting shell (1031), a micro vacuum pump (1032) and a protective net (1033), wherein the connecting shell (1031) is bolted to the front side of the supporting bottom shell (1011), the micro vacuum pump (1032) is bolted to the inner side of the connecting shell (1031), and the protective net (1033) is bolted to the top of the micro vacuum pump (1032).

5. The on-site trace evidence preservation structure for judicial identification according to claim 4 is characterized in that: The control assembly (104) comprises a supporting shell (1041), a control panel (1042) and an air control valve (1043); the supporting shell (1041) is bolted to the front side of the connecting shell (1031); the control panel (1042) is bolted to the front side of the supporting shell (1041); the air control valve (1043) is bolted to both sides of the supporting shell (1041) and the rear side of the supporting shell (1041); the air control valve (1043) is connected to the side air supply pipe (1021) and the main air supply pipe (1022); and the side of the air control valve (1043) close to the micro vacuum pump (1032) is connected to the micro vacuum pump (1032).

6. The on-site trace evidence preservation structure for judicial identification according to claim 2, characterized in that: The frame assembly (201) comprises a connecting frame (2011), a limiting sliding groove (2012) and an observation window (2013); the connecting frame (2011) is snap-connected to the inner side of the limiting sliding groove (1012); the limiting sliding groove (2012) is provided at the front and rear sides of the inner side of the connecting frame (2011); and the observation window (2013) is bolted to both sides of the connecting frame (2011).

7. The on-site trace evidence preservation structure for judicial identification according to claim 6, characterized in that: The limiting component (202) comprises a supporting frame plate (2021), a transparent film (2022) and a folding film (2023); the supporting frame plate (2021) is arranged on the inner side of the connecting frame (2011); the transparent film (2022) is fixedly connected to both sides of the supporting frame plate (2021); and the folding film (2023) is fixedly connected to the front side and the rear side of the supporting frame plate (2021).

8. The on-site trace evidence preservation structure for judicial identification according to claim 7, characterized in that: The guide assembly (203) comprises a limit slide bar (2031), a connection hole (2032) and an encryption ring (2033); the limit slide bar (2031) is bolted to both sides of the front and rear sides of the support frame plate (2021); the side of the limit slide bar (2031) away from the support frame plate (2021) is slidably connected to the inner side of the limit slide groove (2012); the connection hole (2032) is provided at the bottom of the front side of the folding film (2023); and the encryption ring (2033) is snap-fitted to the inner side of the connection hole (2032).

9. The on-site trace evidence preservation structure for judicial identification according to claim 6, characterized in that: The closing component (204) comprises a square cover (2041), an encryption ring (2042) and a limiting sleeve (2043); the square cover (2041) is clamped on the top of the supporting bottom shell (1011); the encryption ring (2042) is clamped on the bottom of the square cover (2041); the bottom of the encryption ring (2042) contacts the top of the supporting bottom shell (1011); the limiting sleeve (2043) is bolted to the bottom of the square cover (2041); and the bottom of the limiting sleeve (2043) contacts the top of the supporting frame plate (2021).

10. The on-site trace evidence preservation structure for judicial identification according to claim 9, characterized in that: The opening component (205) comprises an air blocking cover (2051), a fitting groove (2052) and a vent hole (2053); the fitting groove (2052) is provided at the top of the square cover (2041); the air blocking cover (2051) is rotatably connected to the inner side of the fitting groove (2052); the vent hole (2053) is provided at the inner side of the fitting groove (2052); and the top of the vent hole (2053) is snap-fitted to the bottom of the air blocking cover (2051).

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