Active portable passive millimeter wave human body security check channel folding device

Abstract

The invention relates to the field of human body security check channels, and discloses a main portable passive millimeter wave human body security check channel folding device, which comprises two fixed bases, two foldable side plates and a foldable top plate, and is characterized in that each foldable side plate comprises two first side plates, and the foldable side plates are inserted into the fixed bases through limiting devices; the foldable top plate comprises a first vertical plate, a second vertical plate, a first transverse plate and a second transverse plate, first limiting rails are arranged on the corresponding sides of the foldable side plates, second limiting rails are arranged on the corresponding sides of the first vertical plate and the second vertical plate, and the first limiting rails correspond to the second limiting rails; and the first limiting track and the second limiting track are slidably connected with a moving block, so that the problems that most of the existing passive millimeter wave security check instruments are large in size and inconvenient to deploy, and most of the existing passive millimeter wave security check instruments are fixedly mounted and are difficult to meet security check requirements in some special scenes are solved.

Description

Technical Field

[0001] The present invention relates to the field of human body security inspection channels, and more specifically, to a portable passive millimeter wave human body security inspection channel folding device. Background Art

[0002] The demand for personnel security inspection in various public places such as airports, railway stations, subway stations, and large-scale event sites is constantly increasing. Although traditional security inspection methods, such as metal detectors and X-ray security scanners, have guaranteed public safety to a certain extent, they also have many shortcomings. Metal detectors can only detect metal objects, but not non-metallic contraband; while X-ray security scanners can detect both metal and non-metallic objects, the ionizing radiation they use poses a potential threat to human health, and the scanning process is cumbersome and inefficient.

[0003] In order to overcome the limitations of these traditional security inspection equipment, millimeter wave human body security inspection technology came into being. Millimeter wave security inspection instruments use millimeter wave radio frequency signals for scanning, which can quickly and non-invasively obtain the reflected signals on the human body surface, and convert them into images for display, thereby realizing rapid and accurate detection of items carried by the human body. Among them, passive millimeter wave security inspection instruments have become a research hotspot in the current security inspection field due to their non-contact, high efficiency and privacy protection. However, most of the existing passive millimeter wave security inspection instruments are bulky, inconvenient to deploy, and are mostly fixed installations, which makes it difficult to meet the security inspection needs in some special scenarios. For example, at a large-scale event site that is temporarily built, or a place where the security inspection location needs to be changed frequently.

[0004] Therefore, a portable passive millimeter wave human body security inspection channel folding device is designed to address the above situation. Summary of the invention

[0005] The purpose of the present invention is to provide a portable passive millimeter wave human body security inspection channel folding device to solve the problem raised in the above background technology that most of the existing passive millimeter wave security inspection devices are bulky, inconvenient to deploy, and are mostly fixedly installed, making it difficult to meet the security inspection needs in some special scenarios.

[0006] A portable passive millimeter wave human body security inspection channel folding device comprises two fixed bases, two foldable side panels and a foldable top panel, each foldable side panel comprises two first side panels, the foldable side panels are plugged into the fixed base through a limiting device, the foldable top panel comprises a first vertical panel, a second vertical panel, a first horizontal panel and a second horizontal panel, a first limiting track is provided on the corresponding side of the foldable side panel, a second limiting track is provided on the corresponding side of the first vertical panel and the second vertical panel, the first limiting track and the second limiting track correspond to each other, a moving block is slidably connected to the first limiting track and the second limiting track, a millimeter wave sensor is placed on the moving block, a rotating base is provided between the two fixed bases, and a rotating plate is provided on the foldable top panel, characterized in that it also comprises: The rotation limiting device comprises two connecting sleeves, two first fixed blocks, two rotating shafts and two second fixed blocks, one end of the two connecting sleeves is fixedly mounted on a first side plate, the two second fixed blocks are fixedly mounted on the other first side plate, the other end of the connecting sleeve is fixedly sleeved on the rotating shaft, the rotating shaft is rotatably connected to the inside of the second fixed block, the side wall of the rotating shaft is evenly provided with four circular through holes along the axis, the second fixed block is provided with plug-in holes at positions corresponding to the circular through holes, and the bottom of the second fixed block is provided with a plug-in pin that moves up and down at the position of the plug-in hole when limiting is required, the plug-in pin passes through the plug-in hole and the circular through hole to lock the second fixed block and the circular through hole, and the rotation limiting device is provided on the foldable side plate and the foldable top plate, and the rotation limiting device is used to rotate and fix the two first side plates, the first vertical plate and the first horizontal plate, and the second vertical plate and the second horizontal plate by ninety degrees or one hundred and eighty degrees; A limiting device includes a first hinge, a third hinge and a trapezoidal connector. The first hinge and the third hinge drive the trapezoidal connector to limit rotation. The trapezoidal connector is inclined close to the upper part of the first side panel. A rectangular through groove is provided on the first side panel. The limiting device is used to fix the first side panel.

[0007] Pull rope, a limiting ring is fixedly installed on the first and second vertical plates on the second limiting track, one end of the pull rope is fixedly installed on the rotating plate, the pull rope passes through the limiting ring and the other end is fixedly installed on the moving block, the pull rope is used to complete the up and down movement of the millimeter wave sensor when the rotating plate rotates.

[0008] Preferably, the rotation limiting device also includes a column, two pressing plates are arranged on each second fixed block, and a accommodating space for allowing the bottom pressing plate to move up and down is arranged at the bottom of the rotation limiting device. Two columns are fixedly installed between the two pressing plates, and the column is plugged into the second fixed block. The side walls of the column are located below the pressing plate and above the top wall of the second fixed block and are provided with a spring. The pin is fixedly installed in the middle of the top wall of the bottom pressing plate, the pin and the plug-in hole correspond to each other, and a connecting rod is fixedly installed between the two bottom pressing plates.

[0009] Preferably, the limiting device also includes a cylinder, a second hinge, a telescopic column and a fixed column, the cylinder, the telescopic column and the fixed column are fixedly mounted on a fixed base, the cylinder is connected to the inside of the telescopic column, the cylinder can control the end of the telescopic column to move up and down, the third hinge is hinged at the end of the fixed column, the second hinge is hinged at the end of the telescopic column, the other end of the second hinge is hinged to the third hinge, an integrally formed connecting block is fixedly mounted at the end of the telescopic column, the other end of the connecting block is hinged to the first hinge, the other ends of the first hinge and the third hinge are hinged to the trapezoidal connector, when the second hinge is parallel to the ground and the third hinge is perpendicular to the ground, the top of the trapezoidal connector is parallel to the ground.

[0010] Preferably, when locked, the end of the trapezoidal connector is inserted into the interior of the rectangular through slot, and the turning line of the trapezoidal connector near the front end is in a straight line with the wall surface of the first side plate.

[0011] Preferably, the rectangular through groove is connected to the first limiting rail, the first limiting rail corresponds to the second limiting rail, the first limiting rail and the second limiting rail are T-shaped, the end of the moving block close to the first limiting rail is T-shaped, and the moving block corresponds to both the first limiting rail and the second limiting rail.

[0012] Preferably, the rotating base comprises a pedestal and a rotating disk, and the rotating disk can rotate on the base.

[0013] Preferably, a column is fixedly installed on the top of the rotating plate, the column is rotatably connected to the foldable top plate through a bearing, and pull rings are symmetrically installed on both sides of the bottom of the rotating plate.

[0014] Preferably, the connecting sleeve includes a cylinder and an integrally formed inclined column, the inclined column is fixedly mounted on the first side plate, the cylinder is fixedly sleeved on the rotating shaft, a circular connecting hole is opened on the first fixed block, and one end of the rotating shaft away from the circular through hole is inserted into the circular connecting hole and is rotatably connected to the first fixed block through a bearing.

[0015] Preferably, the bottom of one side of the first fixing block and the second fixing block close to the connecting sleeve is arc-shaped.

[0016] Preferably, a long strip plug-in hole is provided at the end of the second transverse plate, and a side of the first transverse plate corresponding to the second transverse plate is a plug-in plate, and the plug-in plate corresponds to the long strip plug-in hole.

[0017] Compared with the prior art, the advantages of the present invention are: 1. The device has extremely high portability through foldable side panels and top panels, combined with a compact fixed base. When needed, a complete security inspection channel can be quickly built, and when not in use, it can be easily folded and stored for easy transportation and storage. The device can be assembled and deployed in a short time, greatly improving the efficiency of security inspection work. The rotation limiting device achieves precise rotation and firm locking of the side panels and top panels through the precise coordination of the connecting sleeve, shaft and latch, which can ensure the overall stability of the device and avoid safety hazards caused by shaking or collapse. It solves the problem that most existing passive millimeter-wave security inspection devices are bulky, inconvenient to deploy, and are mostly fixedly installed, making it difficult to meet security inspection needs in some special scenarios.

[0018] 2. In the locked state, the firm fixation of the side panels and the top panel reduces the risk of accidental movement and improves the safety of operation. The design of the column and the pressing plate makes it very simple to lock and unlock the latch. The user only needs to press or release the pressing plate to use the elastic force of the spring to move the latch up and down, thereby easily achieving locking or unlocking. This design not only improves the operating efficiency, but also reduces the difficulty of operation, allowing security personnel to quickly complete the installation and disassembly of the device.

[0019] 3. By introducing the air cylinder as the power source, the limit device realizes automatic control. The air cylinder can accurately control the up and down movement of the telescopic column, thereby driving the trapezoidal connector to perform accurate limit operation. When the first hinge, the third hinge and the trapezoidal connector form a stable support structure, the stability of the entire limit device is significantly improved. Driven by the air cylinder, the trapezoidal connector can be accurately inserted into the rectangular through groove of the first side panel to achieve a firm fixation of the side panel. This design effectively prevents the side panel from shaking or falling off during use, thereby ensuring the overall stability and safety of the security inspection channel.

[0020] 4. Through the connection between the pull rope and the rotating plate and the moving block, the up and down moving distance and speed of the millimeter wave sensor can be accurately controlled. Compared with other complex mechanical transmission mechanisms, the pull rope transmission has the characteristics of simple structure and easy installation. It reduces the number and complexity of parts and reduces maintenance costs and time. Since the pull rope transmission does not require additional transmission space, limited space resources can be used more effectively. This is especially important for application scenarios such as security inspection channels that require compact design.

[0021] 5. In order to ensure the stability and accuracy of the pull rope during movement, the first vertical plate and the second vertical plate are fixedly installed with limit rings on the second limit track. The pull rope passes through these limit rings and is guided and restricted by them, avoiding deviation or entanglement during movement.

[0022] 6. Both the first limit rail and the second limit rail are designed in a T shape. This shape design not only increases the contact area between the rail and the moving block, improves the stability and reliability of the connection, but also ensures that the moving block can move along the predetermined path during the movement process, preventing deviation or derailment. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the foldable top plate structure in the present invention; Figure 3 This is a schematic diagram of the structure of the first horizontal plate and the second horizontal plate in the present invention; Figure 4 It is a schematic diagram of the structure of the second vertical plate and the second horizontal plate in the present invention; Figure 5 It is a schematic diagram of folding two first side panels in the present invention; Figure 6 It is a schematic diagram of the structure of the first side plate and the rotating base in the present invention; Figure 7 It is a schematic diagram of two first side panels of the present invention being folded and opened; Figure 8 It is a schematic diagram of the structure of the rotation limiting device in the present invention; Fig. 9 The structure of the limiting device in the present invention is shown in FIG. Figure 1 ; Fig.10 The structure of the limiting device in the present invention is shown in FIG. Figure 2 .

[0024] Explanation of the reference numerals in the figure: 1, fixed base; 2, foldable side plate; 21, first side plate; 211, square snap-in groove; 212, rectangular through groove; 3, foldable top plate; 31, first vertical plate; 32, second vertical plate; 321, protrusion; 33, first horizontal plate; 34, second horizontal plate; 35, limiting ring; 4, limiting device; 41, cylinder; 42, first hinge; 43, second hinge; 44, third hinge; 45, trapezoidal connector; 46, telescopic column; 4 7. Fixed column; 5. First limiting track; 51. Second limiting track; 6. Moving block; 7. Millimeter wave sensor; 8. Rotating base; 9. Rotating plate; 91. Pull ring; 10. Rotation limiting device; 101. Connecting sleeve; 102. First fixed block; 103. Rotating shaft; 104. Second fixed block; 105. Latch; 106. Pressing plate; 107. Circular through hole; 108. Plug hole; 109. Column; 110. Accommodating space; 11. Pull rope. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] See also Figure 1-10 The present invention provides a technical solution: a portable passive millimeter wave human body security inspection channel folding device, comprising two fixed bases 1, two foldable side panels 2 and a foldable top panel 3, each foldable side panel 2 comprises two first side panels 21, the foldable side panel 2 is plugged into the fixed base 1 through a limiting device 4, the foldable top panel 3 comprises a first vertical panel 31, a second vertical panel 32, a first horizontal panel 33 and a second horizontal panel 34, a first limiting track 5 is provided on the corresponding side of the foldable side panel 2, a second limiting track 51 is provided on the corresponding side of the first vertical panel 31 and the second vertical panel 32, the first limiting track 5 and the second limiting track 51 correspond to each other, a moving block 6 is slidably connected to the first limiting track 5 and the second limiting track 51, a millimeter wave sensor 7 is placed on the moving block 6, a rotating base 8 is provided between the two fixed bases 1, and a rotating plate 9 is provided on the foldable top panel 3, characterized in that it also includes: The rotation limiting device 10 includes two connecting sleeves 101, two first fixed blocks 102, two rotating shafts 103 and two second fixed blocks 104. One end of the two connecting sleeves 101 is fixedly mounted on a first side plate 21, and the two second fixed blocks 104 are fixedly mounted on another first side plate 21. The other end of the connecting sleeve 101 is fixedly sleeved on the rotating shaft 103. The rotating shaft 103 is rotatably connected to the inside of the second fixed block 104. The side wall of the rotating shaft 103 is evenly provided with four circular through holes 107 along the axis. The corresponding circular through holes on the second fixed block 104 A plug hole 108 is provided at the position of 107, and a latch 105 that moves up and down is provided at the bottom of the second fixing block 104 at the position of the plug hole 108. When limiting is required, the latch 105 passes through the plug hole 108 and the circular through hole 107 to lock the second fixing block 104 and the circular through hole 107. A rotation limiting device 10 is provided on the foldable side panel 2 and the foldable top panel 3. The rotation limiting device 10 is used to rotate and fix the two first side panels 21, the first vertical panel 31 and the first horizontal panel 33, and the second vertical panel 32 and the second horizontal panel 34 by ninety degrees or one hundred and eighty degrees; The limiting device 4 includes a first hinge 42, a third hinge 44 and a trapezoidal connector 45. The first hinge 42 and the third hinge 44 drive the trapezoidal connector 45 to perform rotational limitation. The trapezoidal connector 45 is inclined close to the upper part of the first side panel 21. A rectangular through groove 212 is provided on the first side panel 21. The limiting device 4 is used to fix the first side panel 21.

[0027] The pull rope 11, the first vertical plate 31 and the second vertical plate 32 are fixedly installed with a limiting ring 35 on the second limiting track 51, one end of the pull rope 11 is fixedly installed on the rotating plate 9, and the other end of the pull rope 11 passes through the limiting ring 35 and is fixedly installed on the moving block 6. The pull rope 11 is used to move the millimeter wave sensor 7 up and down when the rotating plate 9 rotates. In the initial state, the device is in a folded state, and the two foldable side panels 2 and the two foldable top panels 3 are folded and compactly placed on the two fixed bases 1. When the security scanner needs to be unfolded, the operator operates the limiting device 4 to make the trapezoidal connector 45 extend from the fixed base 1 and insert into the rectangular through groove 212 on the first side panel 21 under the drive of the first hinge 42 and the third hinge 44, thereby fixing the side panel to prevent it from shaking during the security inspection process. Subsequently, the operator uses the rotation limiting device 10 to rotate the rotating shaft 103 on the connecting sleeve 101 to rotate the two first side panels 21 and the first vertical panel 31, the second vertical panel 32 and other parts of the top panel to the desired angle. When the predetermined angle is reached, the latch 105 passes through the plug hole 108 on the second fixing block 104 and the circular through hole 107 on the side wall of the rotating shaft 103 to lock the rotating shaft, thereby fixing the top panel structure. Finally, the foldable top panel 3 is opened and placed on the two opened foldable side panels 2 to complete the installation. When work is required, the operator can rotate the rotating plate 9 manually or by mechanical means. As the rotating plate 9 rotates, the pull rope 11 is stretched or relaxed, thereby driving the moving block 6 to move up and down along the track under the guidance of the limit ring 35, realizing the vertical position adjustment of the millimeter wave sensor 7, thereby completing the scanning. The invention solves the problem that most of the existing passive millimeter wave security inspection devices are bulky, inconvenient to deploy, and are mostly fixedly installed, which makes it difficult to meet the security inspection requirements in some special scenarios.

[0028] Furthermore, the rotation limiting device 10 also includes a column 109, two pressing plates 106 are arranged on each second fixed block 104, and a receiving space 110 for the bottom pressing plate 106 to move up and down is arranged at the bottom of the rotation limiting device 10, two columns 109 are fixedly installed between the two pressing plates 106, and the column 109 is plugged into the second fixed block 104, and a spring is sleeved on the side wall of the column 109 below the pressing plate 106 and above the top wall of the second fixed block 104, and a latch 105 is fixedly installed in the middle of the top wall of the bottom pressing plate 106, and the latch 105 corresponds to the plug hole 108, and a connecting rod is fixedly installed between the two bottom pressing plates 106. By pressing the pressing plate 106 to move downward, the latch 105 is in an extended state under the action of the spring and is not inserted into the plug hole 108. At this time, the side plate or the top plate can rotate relatively freely. When the side plate or the top plate needs to be locked, the two pressing plates 106 are released, which drives the latch 105 to move upward until the latch 105 is fully inserted into the corresponding insertion hole 108. The locking action of the latch 105 and the insertion hole 108 prevents the side plate or the top plate from rotating further, thereby achieving the locking function.

[0029] Furthermore, the limiting device 4 also includes a cylinder 41, a second hinge 43, a telescopic column 46 and a fixed column 47. The cylinder 41, the telescopic column 46 and the fixed column 47 are fixedly installed on the fixed base 1. The cylinder 41 is connected to the inside of the telescopic column 46. The cylinder 41 can control the end of the telescopic column 46 to move up and down. The third hinge 44 is hinged at the end of the fixed column 47. The second hinge 43 is hinged at the end of the telescopic column 46. The other end of the second hinge 43 is hinged on the third hinge 44. An integrally formed connecting block is fixedly installed at the end of the telescopic column 46. The other end of the connecting block is hinged to the first hinge 42. The other ends of the first hinge 42 and the third hinge 44 are hinged to the trapezoidal connector 45. When the second hinge 43 is parallel to the ground and the third hinge 44 is perpendicular to the ground, the top of the trapezoidal connector 45 is parallel to the ground.

[0030] Furthermore, when locked, the end of the trapezoidal connector 45 is inserted into the rectangular through slot 212 , and the turning line of the trapezoidal connector 45 near the front end is in a straight line with the wall surface of the first side plate 21 .

[0031] Furthermore, the rectangular through groove 212 is connected to the first limiting rail 5, the first limiting rail 5 corresponds to the second limiting rail 51, the first limiting rail 5 and the second limiting rail 51 are T-shaped, the end of the moving block 6 close to the first limiting rail 5 is T-shaped, and the moving block 6 corresponds to both the first limiting rail 5 and the second limiting rail 51.

[0032] Furthermore, the rotating base 8 includes a base and a rotating disk, and the rotating disk can rotate on the base.

[0033] Furthermore, a column is fixedly installed on the top of the rotating plate 9, and the column is rotatably connected to the foldable top plate 3 through a bearing. Pull rings 91 are symmetrically installed on both sides of the bottom of the rotating plate 9.

[0034] Furthermore, the connecting sleeve 101 includes a cylinder and an integrally formed inclined column, the inclined column is fixedly mounted on the first side plate 21, the cylinder is fixedly sleeved on the rotating shaft 103, a circular connecting hole is opened on the first fixed block 102, and one end of the rotating shaft 103 away from the circular through hole 107 is inserted into the circular connecting hole and is rotatably connected to the first fixed block 102 through a bearing.

[0035] Furthermore, the bottom of the first fixing block 102 and the second fixing block 104 close to the connecting sleeve 101 is arc-shaped.

[0036] Furthermore, a long strip plug-in hole is provided at the end of the second transverse plate 34 , and a side of the first transverse plate 33 corresponding to the second transverse plate 34 is a plug-in plate, and the plug-in plate corresponds to the long strip plug-in hole.

[0037] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A portable passive millimeter wave human body security inspection channel folding device, comprising two fixed bases (1), two foldable side panels (2) and a foldable top panel (3), each foldable side panel (2) comprising two first side panels (21), the foldable side panels (2) being plugged into the fixed base (1) via a limiting device (4), the foldable top panel (3) comprising a first vertical panel (31), a second vertical panel (32), a first horizontal panel (33) and a second horizontal panel (34), and a corresponding side of the foldable side panel (2) being provided with a A first limiting track (5), a second limiting track (51) is provided on a side corresponding to the first vertical plate (31) and the second vertical plate (32), the first limiting track (5) and the second limiting track (51) correspond to each other, a moving block (6) is slidably connected to the first limiting track (5) and the second limiting track (51), a millimeter wave sensor (7) is placed on the moving block (6), a rotating base (8) is provided between the two fixed bases (1), and a rotating plate (9) is provided on the foldable top plate (3), characterized in that: Also includes: A rotation limiting device (10), the rotation limiting device (10) comprising two connecting sleeves (101), two first fixing blocks (102), two rotating shafts (103) and two second fixing blocks (104), one end of the two connecting sleeves (101) being fixedly mounted on a first side plate (21), the two second fixing blocks (104) being fixedly mounted on another first side plate (21), the other end of the connecting sleeve (101) being fixedly sleeved on the rotating shaft (103), the rotating shaft (103) being rotatably connected inside the second fixing blocks (104), the side wall of the rotating shaft (103) being evenly provided with four circular through holes (107) along the axis, the second fixing blocks (104) corresponding to the circular through holes (107) being provided. 7), a plug hole (108) is provided at the position of the plug hole (108), a latch (105) that moves up and down is provided at the bottom of the second fixed block (104) at the position of the plug hole (108), when limiting is required, the latch (105) passes through the plug hole (108) and the circular through hole (107) to lock the second fixed block (104) and the circular through hole (107), and the rotation limiting device (10) is provided on the foldable side plate (2) and the foldable top plate (3), and the rotation limiting device (10) is used to rotate and fix the two first side plates (21), the first vertical plate (31) and the first horizontal plate (33), and the second vertical plate (32) and the second horizontal plate (34) by ninety degrees or one hundred and eighty degrees; a limiting device (4), the limiting device (4) comprising a first hinge (42), a third hinge (44) and a trapezoidal plug-in component (45), the first hinge (42) and the third hinge (44) driving the trapezoidal plug-in component (45) to perform rotation limiting, the trapezoidal plug-in component (45) being inclined close to the upper portion of the first side plate (21), the first side plate (21) being provided with a rectangular through slot (212), the limiting device (4) being used to fix the first side plate (21); A pull rope (11), a limiting ring (35) is fixedly mounted on the first vertical plate (31) and the second vertical plate (32) on the second limiting track (51), one end of the pull rope (11) is fixedly mounted on the rotating plate (9), the pull rope (11) passes through the limiting ring (35) and the other end of the pull rope (11) is fixedly mounted on the moving block (6), and the pull rope (11) is used to move the millimeter wave sensor (7) up and down when the rotating plate (9) rotates.

2. The portable passive millimeter wave human body security inspection channel folding device according to claim 1, characterized in that: The rotation limiting device (10) further comprises a column (109), two pressing plates (106) are arranged on each second fixed block (104), a receiving space (110) is arranged at the bottom of the rotation limiting device (10) for enabling the bottom pressing plate (106) to move up and down, two columns (109) are fixedly installed between the two pressing plates (106), the column (109) is plugged into the second fixed block (104), a spring is sleeved on the side wall of the column (109) below the pressing plate (106) and above the top wall of the second fixed block (104), a latch (105) is fixedly installed in the middle of the top wall of the bottom pressing plate (106), the latch (105) corresponds to the plug hole (108), and a connecting rod is fixedly installed between the two bottom pressing plates (106).

3. The portable passive millimeter wave human body security inspection channel folding device according to claim 1 is characterized in that: The limiting device (4) further comprises a cylinder (41), a second hinge (43), a telescopic column (46) and a fixed column (47); the cylinder (41), the telescopic column (46) and the fixed column (47) are fixedly mounted on the fixed base (1); the cylinder (41) is internally connected to the telescopic column (46); the cylinder (41) can control the end of the telescopic column (46) to move up and down; the third hinge (44) is hinged to the end of the fixed column (47); the second hinge (43) is hinged to the telescopic column The telescopic column (46) is provided at an end thereof, the other end of the second hinge (43) is hinged on the third hinge (44), the end of the telescopic column (46) is fixedly mounted with an integrally formed connecting block, the other end of the connecting block is hinged to the first hinge (42), the other ends of the first hinge (42) and the third hinge (44) are hinged to the trapezoidal connector (45), and when the second hinge (43) is parallel to the ground and the third hinge (44) is perpendicular to the ground, the top of the trapezoidal connector (45) is parallel to the ground.

4. The portable passive millimeter wave human body security inspection channel folding device according to claim 3, characterized in that: When locked, the end of the trapezoidal plug-in connector (45) is inserted into the interior of the rectangular through slot (212), and the turning line of the trapezoidal plug-in connector (45) near the front end is in a straight line with the wall surface of the first side plate (21).

5. The portable passive millimeter wave human body security inspection channel folding device according to claim 4, characterized in that: The rectangular through slot (212) is connected to the first limiting rail (5), the first limiting rail (5) corresponds to the second limiting rail (51), the first limiting rail (5) and the second limiting rail (51) are T-shaped, one end of the moving block (6) close to the first limiting rail (5) is T-shaped, and the moving block (6) corresponds to both the first limiting rail (5) and the second limiting rail (51).

6. The portable passive millimeter wave human body security inspection channel folding device according to claim 1, characterized in that: The rotating base (8) comprises a base and a rotating disk, and the rotating disk can rotate on the base.

7. The portable passive millimeter wave human body security inspection channel folding device according to claim 1, characterized in that: A column is fixedly mounted on the top of the rotating plate (9), and the column is rotatably connected to the foldable top plate (3) via a bearing. Pull rings (91) are symmetrically mounted on both sides of the bottom of the rotating plate (9).

8. The portable passive millimeter wave human body security inspection channel folding device according to claim 1, characterized in that: The connecting sleeve (101) comprises a cylinder and an integrally formed inclined column, the inclined column being fixedly mounted on the first side plate (21), the cylinder being fixedly sleeved on the rotating shaft (103), a circular connecting hole being formed on the first fixed block (102), and one end of the rotating shaft (103) away from the circular through hole (107) being inserted into the circular connecting hole and rotatably connected to the first fixed block (102) via a bearing.

9. The portable passive millimeter wave human body security inspection channel folding device according to claim 8, characterized in that: The bottom of one side of the first fixing block (102) and the second fixing block (104) close to the connecting sleeve (101) is in an arc shape.

10. The portable passive millimeter wave human body security inspection channel folding device according to claim 1, characterized in that: An elongated plug-in hole is provided at the end of the second transverse plate (34); a plug-in plate is provided on one side of the first transverse plate (33) corresponding to the second transverse plate (34); the plug-in plate corresponds to the elongated plug-in hole.

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