Foreign matter prevention switch structure for portable explosive and drug detection device

Abstract

The utility model provides a kind of for portable explosive, foreign matter switch structure of detection device of drug, including shell, air nozzle and rotary cover, the air nozzle is located at shell front end, and inside is equipped with air inlet passage, the rotary cover inner wall center is equipped with the sealing plug of cooperation with air inlet passage, and multiple air inlets are equipped around sealing plug, detachable filter screen is equipped in the air inlet, the rotary cover inner wall is rotatably connected with air nozzle outer wall and can be moved relative to air nozzle axis, for plugging or opening air inlet passage, to realize the intercommunication of closing or opening air inlet and air inlet passage;The utility model optimizes structure design, newly added rotary cover can close the intercommunication of air inlet and air inlet passage when not using, can filter large particle impurities by filter screen when using, can effectively avoid that large particle impurities enter air inlet passage, convenient to use, safe and reliable.

Description

Technical Field

[0001] This utility model relates to a foreign object prevention switch structure for portable explosives and drug detection devices. Background Technology

[0002] Explosives and drugs seriously endanger human safety and health, and their effective detection is one of the important methods to maintain public safety. However, currently used portable explosives and drugs detection devices often allow large particles of impurities to enter through the air inlet during use, which can seriously affect the detection results and make it impossible to identify explosives and drugs. Therefore, existing technologies still need to be improved and developed. Summary of the Invention

[0003] To address the shortcomings mentioned above, this utility model provides a foreign object prevention switch structure for portable explosives and drug detection devices.

[0004] To achieve the above objectives, this utility model provides a foreign object protection switch structure for a portable explosives and drug detection device, including a housing, a gas nozzle, and a rotating cover. The gas nozzle is located at the front end of the housing and has an air inlet channel inside. The rotating cover has a sealing plug at the center of its inner wall that works with the air inlet channel, and multiple air inlets are arranged around the sealing plug. A filter screen is detachably installed inside each air inlet. The inner wall of the rotating cover is rotatably connected to the outer wall of the gas nozzle and can move relative to the axis of the gas nozzle to block or open the air inlet channel, thereby achieving the closing or opening of the connection between the air inlet and the air inlet channel.

[0005] Furthermore, the air inlet is provided with a raised annular platform and an annular groove, and a retaining spring is engaged in the annular groove. The filter screen is disposed between the raised annular platform and the retaining spring.

[0006] Furthermore, the outer wall of the air nozzle is provided with multiple snap-fit ​​grooves, each snap-fit ​​groove including a snap-fit ​​front section, a spiral section, and a snap-fit ​​rear section. The snap-fit ​​front section and the snap-fit ​​rear section are arranged in parallel and are located at both ends of the spiral section. The inner wall of the rotating cover is provided with a snap-fit ​​block that cooperates with the snap-fit ​​groove. When the rotating cover is rotated until the snap-fit ​​block is snapped into the snap-fit ​​front section, the sealing plug on the rotating cover moves away from the air intake channel to open the air intake channel, so that the air intake port is connected to the air intake channel. When the rotating cover is rotated until the snap-fit ​​block is snapped into the snap-fit ​​rear section, the sealing plug on the rotating cover blocks the air intake channel, so that the air intake port is not connected to the air intake channel.

[0007] Furthermore, the upper end of the outer wall surface of the air nozzle is provided with an extension portion, and the extension portion is provided with a notch corresponding to each snap-fit ​​groove. The notch communicates with the spiral section. The inner side wall of the rotating cover is provided with an elastic buckle that cooperates with the extension portion to prevent the rotating cover from disengaging from the air nozzle when rotating.

[0008] Furthermore, the working end of the sealing plug has a trapezoidal cross-section, and the air inlet channel inside the air nozzle has a sealing groove corresponding to the sealing plug.

[0009] Furthermore, the inner wall of the rotating cover is connected to the outer wall of the air nozzle by a thread.

[0010] Furthermore, the housing includes an upper housing and a lower housing, which are fixedly connected by snap-fit.

[0011] Furthermore, the upper housing is provided with a display module, and the housing is provided with a control module and a detection module. The display module receives and displays the detection information from the detection module through the control module.

[0012] Furthermore, the upper housing is provided with a handle.

[0013] The advantages of this utility model compared to the prior art are as follows: This utility model optimizes the structural design. The newly added rotating cover can close the connection between the air inlet and the air intake channel when not in use. When in use, it can filter large particles of impurities through the filter screen, which can effectively prevent large particles of impurities from entering the air intake channel. It is convenient to use and safe and reliable. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the anti-foreign object switch structure for a portable explosives and drug detection device according to the present invention; Figure 2 for Figure 1 Enlarged view of point A in the middle; Figure 3 This is a plan view of the air nozzle involved in this solution. Detailed Implementation

[0015] like Figure 1 As shown in the figure, an anti-foreign object switch structure for a portable explosives and drugs detection device according to an embodiment of the present invention includes a housing 1, which includes an upper housing 2 and a lower housing 3. The upper housing 2 and the lower housing 3 are fixedly connected by a snap fastener, which is simple in structure and easy to assemble and disassemble. The upper housing 2 is provided with a display module 4 and a handle 5. The housing 1 is provided with a control module and a detection module. The control module is connected to the display module 4 and the detection module respectively. The detection module is used to detect explosives and drugs and convert this information into an electrical signal and transmit it to the control module. The display module 4 receives and displays the detection information of the detection module through the control module, so as to facilitate the user to quickly identify explosives and drugs.

[0016] Furthermore, such as Figure 1 , Figure 2As shown, this embodiment also includes a gas nozzle 6 and a rotating cover 7. The gas nozzle 6 is located at the front end of the housing 1 and has an air inlet channel 61 inside. The rotating cover 7 has a sealing plug 71 at the center of its inner wall that works with the air inlet channel 61, and multiple air inlets 72 are arranged around the sealing plug 71. A filter screen 8 is detachably installed inside the air inlet 72. When in use, the filter screen 8 filters out large particles of impurities, so that small particles containing explosives or / and drugs can enter the air inlet channel 61 inside the gas nozzle 6 for vaporization. At the same time, the rotating cover 7... The inner wall is rotatably connected to the outer wall of the nozzle 6 and can move relative to the axis of the nozzle 6, so that the sealing plug 71 can move along the axis of the nozzle 6 in the movable cavity at the front end of the nozzle 6 to block or open the air intake channel 61, thereby closing or opening the connection between the air inlet 72 and the air intake channel 61. That is, when the rotating cover 7 is not in use, it can close the connection between the air inlet 72 and the air intake channel 61. When in use, large particulate impurities can be filtered through the filter screen 8, which can effectively prevent large particulate impurities from entering the air intake channel 61. It is convenient and reliable to use.

[0017] Furthermore, such as Figure 1 , Figure 2 As shown, in this embodiment, the air inlet 72 is provided with a raised annular platform 721 and an annular groove 722. A retaining spring 9 is locked in the annular groove 722. The filter screen 8 is located between the raised annular platform 721 and the retaining spring 9. The retaining spring 9 cooperates with the raised annular platform 721 to axially limit the filter screen 8. The retaining spring 9 is easy to install and remove, and the user can install or remove the filter screen 8 according to the actual situation.

[0018] Furthermore, such as Figures 1-3 As shown, the outer wall of the air nozzle 6 in this embodiment is provided with multiple snap-fit ​​grooves 62. Each snap-fit ​​groove 62 includes a snap-fit ​​front section 621, a spiral section 622, and a snap-fit ​​rear section 623. The snap-fit ​​front section 621 and the snap-fit ​​rear section 623 are arranged in parallel and are located at both ends of the spiral section 622, respectively. The inner wall of the rotating cover 7 is provided with a snap-fit ​​block 73 that cooperates with the snap-fit ​​groove 62. When the rotating cover 7 is rotated until the snap-fit ​​block 73 is engaged in the snap-fit ​​front section 621, the sealing plug 71 on the rotating cover 7 moves away from the air intake channel 61 to open the air intake channel 61. This connects the air inlet 72 with the air intake channel 61, and at this time the flow gap between the sealing plug 71 and the air intake channel 61 is at its maximum. When the rotating cover 7 is rotated until the snap-fit ​​block 73 enters the spiral section 622 from the snap-fit ​​front section 621, the flow gap between the sealing plug 71 and the air intake channel 61 gradually decreases until the snap-fit ​​block 73 of the rotating cover 7 snaps into the snap-fit ​​rear section 623, and the sealing plug 71 on the rotating cover 7 reaches the port of the air inlet 61 to block the air intake channel 61, so that the air inlet 72 and the air intake channel 61 are not connected.

[0019] Furthermore, such as Figures 1-3As shown, in this embodiment, the upper end of the outer wall surface of the air nozzle 6 is provided with an extension portion 63. The extension portion 63 is provided with a notch 631 corresponding to each snap-fit ​​groove 62. The notch 631 communicates with the spiral section 622. The inner side wall of the rotating cover 7 is provided with an elastic buckle that cooperates with the extension portion 63. During installation, the snap-fit ​​block 73 is aligned with the notch 631, and the rotating cover 7 is pressed so that the elastic buckle and the extension portion 63 are snapped together to prevent the rotating cover 7 from disengaging from the air nozzle 6 when it rotates.

[0020] Furthermore, such as Figures 1-3 As shown, the working end cross-section of the sealing plug 71 in this embodiment is trapezoidal, and the air inlet channel 61 inside the air nozzle 6 is provided with a sealing groove 64 corresponding to the sealing plug 71 to improve the sealing performance of the sealing plug 71.

[0021] In addition, the inner wall of the rotating cover 7 and the outer wall of the air nozzle 6 in this embodiment can also be connected by threads (not shown). The sealing plug 71 can be moved along the axis of the air nozzle 6 in the movable cavity at the front end of the air nozzle 6 by rotating the rotating cover 7 in the forward or reverse direction, so as to block or open the air intake channel 61, thereby realizing the connection between the air intake port 72 and the air intake channel 61, which makes the structure simpler.

[0022] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A foreign object protection switch structure for portable explosives and drug detection devices, characterized in that: The device includes a housing (1), an air nozzle (6), and a rotating cover (7). The air nozzle (6) is located at the front end of the housing (1) and has an air intake channel (61) inside. The rotating cover (7) has a sealing plug (71) at the center of its inner wall that works with the air intake channel (61), and multiple air inlets (72) are arranged around the sealing plug (71). A filter screen (8) is detachably provided inside the air inlet (72). The inner wall of the rotating cover (7) is rotatably connected to the outer wall of the air nozzle (6) and can move relative to the axis of the air nozzle (6) to block or open the air intake channel (61), thereby achieving the connection between the air inlet (72) and the air intake channel (61) by closing or opening.

2. The foreign object protection switch structure for a portable explosives and drug detection device according to claim 1, characterized in that: The air inlet (72) is provided with a raised annular platform (721) and an annular groove (722). A retaining spring (9) is fitted inside the annular groove (722). The filter screen (8) is located between the raised annular platform (721) and the retaining spring (9).

3. The foreign object protection switch structure for a portable explosives and drug detection device according to claim 1, characterized in that: The outer wall of the air nozzle (6) is provided with multiple snap-fit ​​grooves (62). Each snap-fit ​​groove (62) includes a snap-fit ​​front section (621), a spiral section (622), and a snap-fit ​​rear section (623). The snap-fit ​​front section (621) and the snap-fit ​​rear section (623) are arranged in parallel and are located at both ends of the spiral section (622). The inner wall of the rotating cover (7) is provided with a snap-fit ​​block (73) that cooperates with the snap-fit ​​groove (62). Rotate the rotating cover (7) to the snap-fit ​​block (73). When the locking block (73) is inserted into the front section (621), the sealing plug (71) on the rotating cover (7) moves away from the air intake channel (61) to open the air intake channel (61), so that the air intake port (72) is connected to the air intake channel (61). When the rotating cover (7) is rotated until the locking block (73) is inserted into the rear section (623), the sealing plug (71) on the rotating cover (7) blocks the air intake channel (61), so that the air intake port (72) is not connected to the air intake channel (61).

4. The foreign object protection switch structure for a portable explosives and drug detection device according to claim 3, characterized in that: The upper end of the outer wall surface of the air nozzle (6) is provided with an extension (63), and the extension (63) is provided with a notch (631) corresponding to each snap-fit ​​groove (62). The notch (631) communicates with the spiral section (622). The inner side wall of the rotating cover (7) is provided with an elastic buckle that cooperates with the extension (63) to restrict the rotating cover (7) from disengaging from the air nozzle (6) when it rotates.

5. The foreign object protection switch structure for a portable explosives and drug detection device according to claim 3, characterized in that: The working end of the sealing plug (71) has a trapezoidal cross section, and the air inlet channel (61) inside the air nozzle (6) is provided with a sealing groove (64) corresponding to the sealing plug (71).

6. The foreign object protection switch structure for a portable explosives and drug detection device according to claim 1, characterized in that: The inner wall of the rotating cover (7) is connected to the outer wall of the air nozzle (6) by a thread.

7. A foreign object prevention switch structure for a portable explosives and drug detection device according to any one of claims 1 to 6, characterized in that: The housing (1) includes an upper housing (2) and a lower housing (3), which are fixedly connected by snap fasteners.

8. The foreign object protection switch structure for a portable explosives and drug detection device according to claim 7, characterized in that: The upper housing (2) is provided with a display module (4), and the housing (1) is provided with a control module and a detection module. The display module (4) receives and displays the detection information of the detection module through the control module.

9. The foreign object protection switch structure for a portable explosives and drug detection device according to claim 7, characterized in that: The upper housing (2) is provided with a handle (5).

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