A stereoscopic footprint extraction device

Abstract

The utility model discloses a kind of three-dimensional footprint extraction devices, including extraction box and fixed in the pouring opening of extraction box top surface, further include the skeleton of the movable setting in extraction box inboard, and the surface of skeleton is opened with multiple circular perforations through;And two roof support columns are fixed in the top surface of skeleton, and the top end of roof support column is through to the top of extraction box;The utility model is improved to the three-dimensional footprint extraction device in prior art, the skeleton in extraction box is designed as height adjustable structure, and operating personnel can be according to actual scene requirement, and skeleton height is flexibly adaptable to adjust through simple limiting mechanism, so that skeleton is at a suitable height, make skeleton after gypsum pouring is completed in the region of relative center, avoid skeleton too high or too low, thereby in guarantee reinforcing effect, adapt to the preparation demand of different thickness footprint gypsum model, significantly improve the adaptability, operation convenience and model quality stability of three-dimensional footprint extraction.

Description

Technical Field

[0001] This utility model belongs to the field of three-dimensional footprint extraction technology, specifically relating to a three-dimensional footprint extraction device. Background Technology

[0002] In fields such as criminal investigation, crime scene investigation, and cultural relic protection, three-dimensional footprint extraction is an important technical means to obtain key physical evidence information. Traditional three-dimensional footprint extraction devices usually use the plaster casting method, which involves pouring plaster slurry into the footprint extraction box and allowing it to solidify to form a three-dimensional model that perfectly matches the shape of the footprint. During this process, the skeleton structure (usually made of metal or hard plastic) set inside the extraction box supports and reinforces the plaster model, which can effectively prevent the plaster model from breaking or deforming due to insufficient thickness or curing shrinkage, thereby ensuring the integrity and accuracy of the footprint feature information. However, the inner frame height of the extraction box in the existing technology is generally fixed, and its technical defects are mainly reflected in the following aspects: 1. Insufficient adaptability: The depth, size, and bearing medium (such as soil, sand, snow, etc.) of footprints vary significantly in different scenarios, resulting in different requirements for plaster casting thickness. For example, shallow footprints only require a thin layer of plaster to fully reproduce their features, while footprints in deep or soft media require a thicker layer of plaster to ensure the strength of the model. A fixed-height skeleton cannot match the actual casting thickness. If the skeleton is too high, the plaster layer may be too thin, thus losing its reinforcement purpose, or if the skeleton is too low, the plaster layer may be too thick, increasing material waste and operational difficulty.

[0003] 2. Unstable reinforcement effect: When the height of the skeleton does not match the thickness of the plaster, the skeleton may deviate from the center area of ​​the plaster model. If the skeleton is too close to the surface of the model, its reinforcement effect is concentrated in a local area, which can easily cause stress concentration and lead to cracking of the model. If the skeleton is not buried deep enough, it cannot effectively restrain the shrinkage deformation during the curing process of the plaster, reducing the overall stability of the extracted footprint model.

[0004] Therefore, this utility model proposes a three-dimensional footprint extraction device. Utility Model Content

[0005] The purpose of this invention is to provide a three-dimensional footprint extraction device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a three-dimensional footprint extraction device, comprising an extraction box and a pouring port fixed to the top surface of the extraction box, and further comprising... The active device is set inside the skeleton of the extraction box, and multiple circular holes are opened through the surface of the skeleton; And two top support columns fixed to the top surface of the skeleton, with the top of the top support columns extending through to the top of the extraction box; The extraction box also includes two limiting mechanisms on the top of the extraction box that limit the top support column. These mechanisms include a cylindrical shaft block fixed to the top surface of the extraction box, a rotating sleeve rotatably fitted onto the bottom surface of the cylindrical shaft block, and a limiting strip fixed to one side surface of the rotating sleeve. The side of the top support column is provided with multiple strip-shaped slots corresponding to the limiting strips, and the end of the limiting strip is screwed into one of the strip-shaped slots.

[0007] Preferably, the top surface of the extraction box has two rectangular column holes corresponding to the top support column.

[0008] Preferably, a rubber inner seat is embedded in the inner wall of the rectangular column hole, and the side of the rubber inner seat is provided with an integral sealing strip that is in close contact with the top support column.

[0009] Preferably, the inner rubber seat has a deformation cavity inside that corresponds to the position of the sealing strip.

[0010] Preferably, the limiting mechanism further includes a positioning structure, which is disposed between the rotating sleeve and the cylindrical shaft block.

[0011] Preferably, the positioning structure includes a rubber side plate fixed to the other side surface of the rotating sleeve, and the top end of the rubber side plate extends to the top end of the cylindrical shaft block. The top surface of the cylindrical shaft block is fixed with a plurality of positioning protrusions, and the top surface of the rubber side plate is provided with positioning holes corresponding to the positioning protrusions, and the end of one of the positioning protrusions is inserted into the positioning hole.

[0012] Preferably, the bottom surface of the extraction box is fixed with a plurality of ground pins, and the ground pins are conical.

[0013] Preferably, the pouring port communicates with the inside of the extraction box.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model improves the existing three-dimensional footprint extraction device by designing the skeleton inside the extraction box as a height-adjustable structure. Operators can flexibly and adaptively adjust the height of the skeleton according to the actual needs of the scene through a simple limiting mechanism, so that the skeleton is at a suitable height and is located in a relatively central area after the plaster is poured. This avoids the skeleton being too high or too low, thereby ensuring the reinforcement effect while adapting to the preparation needs of footprint plaster models of different thicknesses, significantly improving the adaptability, ease of operation, and stability of model quality in three-dimensional footprint extraction. Attached Figure Description

[0015] Figure 1 This is a top perspective view of the present invention; Figure 2 This is a bottom-view perspective view of the present invention; Figure 3 This is a front sectional view of the present invention; Figure 4 This utility model Figure 1 A magnified view of a portion of region A in the middle; Figure 5 This utility model Figure 3 A magnified view of a portion of region B in the middle; In the diagram: 1. Extraction box; 11. Rectangular column hole; 12. Rubber inner seat; 13. Sealing strip; 2. Pouring port; 3. Ground pin; 4. Skeleton; 41. Circular leakage hole; 5. Top support column; 51. Strip-shaped bayonet; 6. Limiting mechanism; 61. Cylindrical shaft block; 62. Rotating sleeve; 63. Limiting strip; 64. Rubber side plate; 65. Positioning hole; 66. Positioning protrusion. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Example 1 Please see Figures 1 to 5 This is the first embodiment of the present invention, which provides a technical solution: a three-dimensional footprint extraction device, including an extraction box 1 and a pouring port 2 fixed on the top surface of the extraction box 1, and further including... The active setting is the skeleton 4 inside the extraction box 1, and the surface of the skeleton 4 is provided with multiple circular holes 41 for the gypsum liquid to flow through. And two top support columns 5 welded and fixed to the top surface of the frame 4, with the top of the top support column 5 extending through to the top of the extraction box 1; The extraction box 1 is equipped with two limiting mechanisms 6 on top to limit the support column 5. These mechanisms include a cylindrical shaft block 61 fixed to the top surface of the extraction box 1, a rotating sleeve 62 rotatably sleeved on the bottom surface of the cylindrical shaft block 61, and a limiting strip 63 welded and fixed to one side surface of the rotating sleeve 62. The side of the support column 5 has multiple strip-shaped slots 51 corresponding to the limiting strips 63. The end of the limiting strip 63 is screwed into one of the strip-shaped slots 51, which can effectively and stably support the support column 5 and ensure the height stability of the frame 4. When the height of the frame 4 needs to be adjusted later, the end of the limiting strip 63 can be screwed out of the strip-shaped slot 51 to quickly release the support column 5. The limit is reached, and the skeleton 4 can be moved up and down to adjust its height, ensuring that the skeleton 4 can be adjusted to a suitable height. Then, the end of the limit clip 63 is rotated into the strip-shaped slot 51 to another position, which can quickly complete the limit after the height adjustment of the skeleton 4. This allows the operator to adjust the skeleton 4 to a suitable height according to the actual footprint extraction needs and environment when actually pouring plaster. This ensures that after the operator pours the plaster liquid into the extraction box 1 through the pouring port 2 to pour the footprint model, the skeleton 4 can be in the relatively central area of ​​the model, avoiding the skeleton 4 being too high or too low, thus ensuring that the skeleton 4 can stably reinforce and support the model.

[0018] In this embodiment, preferably, the top surface of the extraction box 1 has two rectangular column holes 11 corresponding to the top support column 5, so that the top support column 5 can move smoothly through.

[0019] In this embodiment, preferably, the limiting mechanism 6 further includes a positioning structure. The positioning structure is disposed between the rotating sleeve 62 and the cylindrical shaft block 61. The positioning structure includes a rubber side plate 64 fixed to the other side surface of the rotating sleeve 62, and the top end of the rubber side plate 64 extends to the top end of the cylindrical shaft block 61. A plurality of positioning protrusions 66 are fixed on the top surface of the cylindrical shaft block 61. A positioning hole 65 corresponding to the positioning protrusion 66 is opened through the top surface of the rubber side plate 64. The end of one of the positioning protrusions 66 is inserted into the positioning hole 65, which can play a certain auxiliary positioning role for the rubber side plate 64 and the rotating sleeve 62, prevent the rotating sleeve 62 and the limiting strip 63 from rotating, and ensure the limiting support stability of the limiting strip 63 for the top support column 5. If the limiting strip 63 needs to be removed later, the positioning structure can be adjusted accordingly. When the end of the strip 63 is unscrewed from the strip-shaped slot 51, simply push the limiting strip 63 forcefully to rotate the rotating sleeve 62 and cause the initial positioning protrusion 66 to be squeezed out from the positioning hole 65, so that the top of the rubber side plate 64 separates from the initial positioning protrusion 66, and the rotating sleeve 62 can be rotated smoothly until the end of another positioning protrusion 66 is squeezed into the positioning hole 65, thus achieving the limiting of the rotating sleeve 62 after rotation. In this embodiment, there are four positioning protrusions 66, which are evenly distributed on the top surface of the cylindrical shaft block 61, so that every time the rotating sleeve 62 rotates around the cylindrical shaft block 61 by 90 degrees, the end of one positioning protrusion 66 will be inserted into the positioning hole 65, thus achieving the auxiliary limiting of the rotating sleeve 62 after rotation of 90 degrees.

[0020] In this embodiment, preferably, the bottom surface of the extraction box 1 is fixed with multiple ground pins 3, and the ground pins 3 are conical. This allows the operator to press the extraction box 1 into the ground when extracting the three-dimensional footprint, so that the ground pins 3 are inserted into the soil around the footprint. This ensures that the extraction box 1 is stably limited during plaster pouring, preventing displacement and ensuring the stability of the extraction of the footprint on the ground. When the operator injects plaster liquid into the extraction box 1 through the pouring port 2, it will flow to the ground through the circular drain hole 41. After the operator finishes injecting the plaster liquid, waits for the plaster to solidify, removes the extraction box 1, and pushes down the top support column 5, so that the plaster model, together with the skeleton 4 solidified inside the model, is pushed out of the extraction box 1 as a whole, thus completing the extraction of the three-dimensional plaster model of the footprint. At this time, the two top support columns 5 can also facilitate the operator to pick up the removed footprint model.

[0021] In this embodiment, preferably, the pouring port 2 communicates with the inside of the extraction box 1.

[0022] Example 2 Please see Figures 1 to 5This is the second embodiment of the present invention. This embodiment is based on the previous embodiment, but the difference is that a rubber inner seat 12 is embedded in the inner wall of the rectangular column hole 11, and the side of the rubber inner seat 12 is provided with an integral sealing strip 13 that is in close contact with the top support column 5. Both the sealing strip 13 and the rubber inner seat 12 are made of fluororubber, which can undergo elastic deformation, and can improve the sealing performance at the rectangular column hole 11 without affecting the lifting and lowering movement of the top support column 5.

[0023] In this embodiment, preferably, the inner rubber seat 12 has a deformation cavity inside that corresponds to the position of the sealing strip 13, so that the sealing strip 13 has sufficient deformation space when it is squeezed.

[0024] Although embodiments of the present invention have been shown and described (see the detailed description above), it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A three-dimensional footprint extraction device, comprising an extraction box (1) and a pouring port (2) fixed on the top surface of the extraction box (1), characterized in that: Also includes The skeleton (4) is set inside the extraction box (1), and multiple circular holes (41) are opened through the surface of the skeleton (4). And two top support columns (5) fixed on the top surface of the frame (4), with the top of the top support column (5) extending through to the top of the extraction box (1); And two limiting mechanisms (6) set on the top of the extraction box (1) to limit the top support column (5), including a cylindrical shaft block (61) fixed on the top surface of the extraction box (1), a rotating sleeve (62) rotatably sleeved on the bottom surface of the cylindrical shaft block (61), and a limiting strip (63) fixed on one side surface of the rotating sleeve (62). The side of the top support column (5) is provided with multiple strip slots (51) corresponding to the limiting strips (63), and the end of the limiting strip (63) is screwed into one of the strip slots (51).

2. The three-dimensional footprint extraction device according to claim 1, characterized in that: The top surface of the extraction box (1) has two rectangular column holes (11) that correspond to the top support column (5).

3. The three-dimensional footprint extraction device according to claim 2, characterized in that: A rubber inner seat (12) is embedded in the inner wall of the rectangular column hole (11), and the side of the rubber inner seat (12) is provided with an integral sealing strip (13) that is in close contact with the top support column (5).

4. The three-dimensional footprint extraction device according to claim 3, characterized in that: The rubber inner seat (12) has a deformation cavity inside that corresponds to the position of the sealing strip (13).

5. The three-dimensional footprint extraction device according to claim 1, characterized in that: The limiting mechanism (6) further includes a positioning structure, which is disposed between the rotating sleeve (62) and the cylindrical shaft block (61).

6. The three-dimensional footprint extraction device according to claim 5, characterized in that: The positioning structure includes a rubber side plate (64) fixed to the other side surface of the rotating sleeve (62), and the top end of the rubber side plate (64) extends to the top end of the cylindrical shaft block (61). The top surface of the cylindrical shaft block (61) is fixed with a plurality of positioning protrusions (66). The top surface of the rubber side plate (64) is provided with positioning holes (65) corresponding to the positioning protrusions (66), and the end of one of the positioning protrusions (66) is inserted into the positioning hole (65).

7. The three-dimensional footprint extraction device according to claim 1, characterized in that: The bottom surface of the extraction box (1) is fixed with a plurality of ground pins (3), and the ground pins (3) are conical.

8. The three-dimensional footprint extraction device according to claim 1, characterized in that: The pouring port (2) is connected to the inside of the extraction box (1).

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