Infrared detection assembly and security check door

Abstract

The utility model discloses an infrared detection assembly and a security check door, and relates to the technical field of security and protection equipment design. The infrared detection assembly is applied to the security check door and comprises an infrared emitting part and an infrared receiving part which are oppositely arranged and used for being arranged on a first door body and a second door body of the security check door, and the infrared emitting part on the first door body is opposite to the infrared receiving part on the second door body to form a first set of infrared detection assembly. The infrared receiving piece on the first door body is opposite to the infrared emitting piece on the second door body to form a second group of infrared detection assemblies, the infrared emitting piece and the infrared receiving piece both comprise a protective shell and a sensor, at least part of the sensor is arranged in a containing cavity of the protective shell, the protective shell is provided with a shading area and a light-transmitting area which are connected, and the shading area and the light-transmitting area are arranged in the containing cavity. The shading area surrounds the light-transmitting area, the light-transmitting area faces a security check channel of the security check door, and the sensor is opposite to the light-transmitting area. According to the scheme, the problem that two groups of infrared detection pieces on the existing security door are easy to generate signal crosstalk can be solved.

Description

Technical Field

[0001] This application belongs to the field of security equipment design technology, specifically relating to an infrared detection component and a security gate. Background Technology

[0002] Currently, security gates are widely used in various fields, such as train stations, airports, shopping malls, libraries, convention centers and other public places with high traffic, mainly for security checks on people and goods.

[0003] In practical applications, when security gates are placed in outdoor or semi-outdoor settings, the infrared detection components installed on the gate body need to emit strong infrared rays to avoid the infrared rays being overwhelmed. However, this can lead to signal crosstalk between the two sets of infrared detection components installed on the same gate body. Utility Model Content

[0004] The purpose of this application is to provide an infrared detection component and a security gate that can solve the problem of signal crosstalk between the two sets of infrared detection components on the current security gate.

[0005] To solve the above-mentioned technical problems, this application is implemented as follows:

[0006] In a first aspect, embodiments of this application provide an infrared detection component applied to a security gate, comprising an infrared emitter and an infrared receiver arranged opposite to each other. Both the infrared emitter and the infrared receiver are disposed on a first gate body and a second gate body of the security gate. The infrared emitter on the first gate body and the infrared receiver on the second gate body face each other to form a first set of the infrared detection components. The infrared receiver on the first gate body and the infrared emitter on the second gate body face each other to form a second set of the infrared detection components.

[0007] Both the infrared transmitter and the infrared receiver include a protective shell and a sensor. At least a portion of the sensor is disposed within the receiving cavity of the protective shell. The protective shell has a connected light-shielding area and a light-transmitting area. The light-shielding area surrounds the light-transmitting area, and the light-transmitting area faces the security inspection channel of the security gate. The sensor is opposite to the light-transmitting area.

[0008] Secondly, this application also provides a security gate, including a first gate body, a second gate body, and the aforementioned infrared detection components. A security inspection channel is formed between the first gate body and the second gate body. Both the first gate body and the second gate body are provided with infrared emitters and infrared receivers arranged at intervals. The infrared emitters on the first gate body and the infrared receivers on the second gate body are opposite to each other to form a first set of infrared detection components. The infrared receivers on the first gate body and the infrared emitters on the second gate body are opposite to each other to form a second set of infrared detection components.

[0009] In this embodiment, the infrared emitter and receiver disposed on the first and second gates each include a protective shell and a sensor. At least a portion of the sensor is disposed within the receiving cavity of the protective shell. The protective shell includes a connected light-transmitting area and a light-blocking area, with the light-blocking area surrounding the light-transmitting area and the light-transmitting area facing the security checkpoint. The sensor is opposite to the light-transmitting area. When the sensor of the infrared emitter emits infrared light, this portion of the infrared light passes sequentially through the light-transmitting area of ​​the infrared emitter, the security checkpoint, and the light-transmitting area of ​​the infrared receiver, and is thus received by the sensor of the infrared receiver. Simultaneously, the infrared light directed towards the light-blocking area is blocked by the light-blocking area of ​​the infrared emitter, thereby preventing it from being received by the infrared receiver on the same gate, and thus avoiding signal crosstalk between the first and second sets of infrared detection components disposed on the security gate. Attached Figure Description

[0010] Figures 1 to 2 These are schematic diagrams of the security gate disclosed in the embodiments of this application from different perspectives.

[0011] Figure 3 This is an exploded view of the infrared emitter disclosed in the embodiments of this application;

[0012] Figure 4 This is an exploded view of the infrared receiver disclosed in the embodiments of this application;

[0013] Figures 5 to 6 These are schematic diagrams of the first housing disclosed in the embodiments of this application from different perspectives;

[0014] Figure 7 This is a schematic diagram of the structure of the second housing disclosed in an embodiment of this application.

[0015] Explanation of reference numerals in the attached figures:

[0016] 100-Infrared emitter, 110-Protective shell, 111-Shielding area, 112-Light-transmitting area, 113-First shell, 113a-Avoidance opening, 113b-Positioning groove, 113c-Supporting rib, 113d-Protrusion, 113e-Positioning part, 113f-Main body, 113h-Reinforcing rib, 114-Second shell, 114a-Avoidance through hole, 114b-Snap-fit ​​post, 114c-Annular main body, 114c1-First annular structure, 114c2-Second annular structure, 114d-Positioning post, 114e-Annular mounting groove, 114f-Snap-fit ​​part, 114g-Receiving groove, 120-Sensor, 121-Device body, 122-Circuit board;

[0017] 200-Infrared receiver;

[0018] 310 - First door body, 320 - Second door body, 330 - Top connecting component. Detailed Implementation

[0019] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0020] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0021] The infrared detection component and security gate provided in this application will be described in detail below with reference to the accompanying drawings, through specific embodiments and application scenarios.

[0022] like Figures 1 to 7As shown in the illustration, this application discloses an infrared detection component applied to a security gate. The infrared detection component includes an infrared emitter 100 and an infrared receiver 200 arranged opposite to each other. Both the infrared emitter 100 and the infrared receiver 200 are used to be installed on a first gate body 310 and a second gate body 320 of the security gate. The infrared emitter 100 on the first gate body 310 and the infrared receiver 200 on the second gate body 320 are opposite to each other to form a first set of infrared detection components. In contrast, a second set of infrared detection components is formed. That is, the infrared emitters 100 and infrared receivers 200 of the first set of infrared detection components and the second set of infrared detection components are respectively set on different door bodies. The infrared emitters 100 of the first set of infrared detection components and the infrared receivers 200 of the second set of infrared detection components are located on the same door body, while the infrared receivers 200 of the first set of infrared detection components and the infrared emitters 100 of the second set of infrared detection components are located on another door body. In other words, the infrared emitters 100 and infrared receivers 200 of each set are alternately set.

[0023] Both the infrared emitter 100 and the infrared receiver 200 include a protective housing 110 and a sensor 120. The sensor 120 of the infrared emitter 100 is used to emit infrared rays, and the sensor 120 of the infrared receiver 200 is used to receive infrared rays. At least a portion of the sensor 120 is disposed within the receiving cavity of the protective housing 110. The protective housing 110 has a connected light-shielding area 111 and a light-transmitting area 112. The light-shielding area 111 surrounds the light-transmitting area 112. Optionally, the light-shielding area 111 can be a ring structure. In the optical axis direction of the sensor 120, the outer contour line of the orthographic projection of the light-shielding area 111 coincides with the field of view of the sensor 120. The light-transmitting area 112 faces the security check channel of the security gate. The sensor 120 is opposite to the light-transmitting area 112, so that the infrared rays emitted by the sensor 120 pass through the light-transmitting area 112 of the infrared emitter 100 and are received by the sensor 120 through the light-transmitting area 112 of the infrared receiver 200.

[0024] In this embodiment, when the sensor 120 of the infrared emitter 100 emits infrared light, this infrared light passes sequentially through the light-transmitting area 112 of the infrared emitter 100, the security check channel, and the light-transmitting area 112 of the infrared receiver 200, and is thus received by the sensor 120 of the infrared receiver 200. Simultaneously, the infrared light directed towards the light-shielding area 111 is blocked by the light-shielding area 111 of the infrared emitter 100, thereby preventing it from being received by the infrared receiver 200 on the same gate body. This avoids signal crosstalk between the first and second sets of infrared detection components on the security gate. Therefore, this embodiment can solve the problem of signal crosstalk easily occurring between the two sets of infrared detectors on current security gates.

[0025] In one optional embodiment, the protective shell 110 includes a first shell 113, which has a cylindrical structure. The two opposite ends of the first shell 113 are respectively provided with a light-transmitting area 112 and an opening of a receiving cavity. The sensor 120 can be disposed in the receiving cavity, and a sealing cover is additionally provided at the opening of the receiving cavity. Alternatively, the sensor 120 includes an electrically connected device body 121 and a circuit board 122. The device body 121 is used to emit or receive infrared rays. The device body 121 is disposed in the receiving cavity and is opposite to the light-transmitting area 112. The circuit board 122 covers the opening of the receiving cavity to seal the receiving cavity. That is, the circuit board 122 of the sensor 120 is used as a sealing cover. This can reduce the space occupied by the sensor 120 in the receiving cavity, thereby reducing the size of the infrared emitter 100 and the infrared receiver 200, and saving the manufacturing cost of the infrared detection component.

[0026] Optionally, the central axis of the device body 121, the central axis of the light-transmitting area 112, and the central axis of the first housing 113 coincide, that is, the optical axis of the device body 121 coincides with the central axis of the light-transmitting area 112. This can improve the utilization rate of the infrared rays emitted by the device body 121. When the central axis of the light-transmitting area 112 coincides with the central axis of the first housing 113, it not only facilitates the installation of the circuit board 122, but also ensures that the space around the device body 121 is basically the same size, which facilitates the arrangement of other structures. Of course, the central axis of the device body 121, the central axis of the light-transmitting area 112, and the central axis of the first housing 113 may not coincide.

[0027] Optionally, the first housing 113 may include a connected light-transmitting portion and a light-shielding portion, i.e., the first housing 113 is made of two different materials, but this is inconvenient for the processing and manufacturing of the first housing 113; or, in another optional embodiment, the first housing 113 is a light-transmitting structure, i.e., the first housing 113 is made of the same material, to facilitate the manufacturing of the first housing 113. The protective shell 110 also includes a second housing 114, which is a light-shielding structure. Optionally, the second housing 114 may be made of black light-shielding material. The second housing 114 faces the security checkpoint and has a clearance through hole 114a opposite to the light-transmitting area 112. The second housing 114 and the first housing 113 can be connected by fasteners such as screws; or, optionally, the second housing 114 has at least two snap-fit ​​posts 114b, the first end of each snap-fit ​​post 114b extending to the circuit board 12. 2. The side facing away from the first housing 113 is arranged so that each snap-fit ​​post 114b is snap-fitted with the circuit board 122. At this time, the second housing 114 is not only used to block infrared light, but also to fix the sensor 120 to the first housing 113. Furthermore, the snap-fit ​​method can not only ensure the connection stability between the sensor 120 and the first housing 113, but also avoid opening connection holes on the circuit board 122 and the first housing 113 of the sensor 120, thereby ensuring the structural strength of the circuit board 122 and the first housing 113.

[0028] Optionally, the snap-fit ​​posts 114b are arranged at intervals along the circumference of the first housing 113 so that the circuit board 122 and the first housing 113 are subjected to more uniform force in their circumference, thereby further improving the connection stability between the sensor 120 and the first housing 113.

[0029] Optionally, each snap-fit ​​post 114b can mate with the outer peripheral surface of the first housing 113; or, in other optional embodiments, the first housing 113 is provided with at least two clearance openings 113a, each clearance opening 113a extending along the extension direction of the central axis of the receiving cavity, and the two ends of each clearance opening 113a respectively penetrate through the two opposite end faces of the first housing 113, and the first end of each snap-fit ​​post 114b respectively extends through each clearance opening 113a to the side of the circuit board 122 away from the first housing 113, that is, the part of each snap-fit ​​post 114b is respectively disposed in each clearance opening 113a, which can avoid each snap-fit ​​post 114b occupying additional space, thereby reducing the size of the infrared emitter 100 and the infrared receiver 200.

[0030] Optionally, each clearance opening 113a is provided with a reinforcing rib 113h, with part of the reinforcing rib 113h located inside the clearance opening 113a and the other part located inside the receiving cavity. This can improve the structural strength of the clearance opening 113a of the first housing 113.

[0031] In another optional embodiment, the second housing 114 includes an annular body 114c and at least two snap-fit ​​posts 114b. Each snap-fit ​​post 114b is disposed on the side of the annular body 114c facing the first housing 113. The inner annular surface of the annular body 114c forms the aforementioned clearance through hole 114a. The side of the first housing 113 facing the annular body 114c has a protrusion 113d, at least a portion of which extends into the clearance through hole 114a. The light-transmitting area 112 is located in the protrusion 113d. In this solution, at least a portion of the protrusion 113d extends into the clearance through hole 114a, which avoids the protrusion 113d occupying additional space, thereby improving the assembly compactness between the second housing 114 and the first housing 113, and further reducing the size of the infrared emitter 100 and the infrared receiver 200.

[0032] In a further optional embodiment, the second housing 114 further includes at least two positioning posts 114d, each positioning post 114d being disposed on the side of the annular body 114c facing the first housing 113. The side of the first housing 113 facing the annular body 114c is provided with at least two positioning grooves 113b. The positioning posts 114d are arranged at intervals around the protrusions 113d, and each positioning post 114d and each positioning groove 113b are positioned and engaged in the circumferential direction of the first housing 113. This can prevent relative rotation between the second housing 114 and the first housing 113, thereby improving the relative stability between them. Furthermore, during the assembly of the second housing 114 and the first housing 113, each positioning post 114d can play a guiding role, thereby improving assembly efficiency. Of course, the positioning posts 114d may not be provided.

[0033] Optionally, the positioning posts 114d can be arranged arbitrarily; or, the positioning posts 114d and the snap-fit ​​posts 114b can be arranged alternately along the circumference of the first housing 113 so that the second housing 114 and the first housing 113 are subjected to relatively uniform force in their circumference, thereby further improving the relative stability between the second housing 114 and the first housing 113.

[0034] In one optional embodiment, the annular body 114c is located within the security check channel, i.e., the annular body 114c protrudes from the first door 310 or the second door 320. The side of the annular body 114c facing away from the security check channel is provided with an annular mounting groove 114e. Each snap-fit ​​post 114b is provided at the bottom of the annular mounting groove 114e. The first housing 113 includes a connected main body portion 113f and a protruding portion 113d. The protruding portion 113d is located on the side of the main body portion 113f facing the second housing 114. A portion of the main body portion 113f is located within the annular mounting groove 114e and cooperates with the annular mounting groove 114e. This can increase the contact area between the second housing 114 and the first housing 113, thereby improving the connection stability between the two. Furthermore, the fact that a portion of the main body portion 113f of the first housing 113 is located within the annular mounting groove 114e can reduce the additional space occupied by the first housing 113, thereby facilitating a further reduction in the size of the infrared emitter 100 and the infrared receiver 200.

[0035] Optionally, the annular body 114c includes a first annular structure 114c1 and a second annular structure 114c2 that are fitted together. The outer peripheral surface of the first annular structure 114c1 is connected to the inner annular surface of the second annular structure 114c2. The first annular structure 114c1 is a flat plate structure. Each snap-fit ​​post 114b is disposed on the first annular structure 114c1. The thickness of the first annular structure 114c1 is less than the height of the inner annular surface of the second annular structure 114c2. The first annular structure 114c1 is located in the middle area of ​​the inner annular surface of the second annular structure 114c2, so that the above-mentioned annular mounting groove 114e and receiving groove 114g are formed on the two opposite sides of the second housing 114, respectively. The receiving groove 114g is used for hand gripping to facilitate the installation of the external transmitter 100 and the infrared receiver 200.

[0036] Optionally, in the direction of extension from the first annular structure 114c1 to the second annular structure 114c2, the thickness of the second annular structure 114c2 gradually decreases, that is, the side of the second annular structure 114c2 facing away from the first housing 113 is an arc-shaped convex surface, which avoids forming sharp corners that could scratch passersby while making it easy to hold.

[0037] In another optional embodiment, the sidewall of the first housing 113 is provided with at least two support ribs 113c, each support rib 113c being disposed within the receiving cavity. The support ribs 113c are arranged at circumferential intervals along the first housing 113, and all support ribs 113c have equal heights, each height being less than the height of the receiving cavity. The circuit board 122 is supported by the support ribs 113c. This increases the contact area between the sensor 120 and the first housing 113, thereby improving the connection stability between them. Furthermore, the circuit board 122... At least part of it is located within the receiving cavity, which improves the assembly compactness between the sensor 120 and the first housing 113, thereby further reducing the size of the external emitter 100 and the infrared receiver 200. Additionally, there is a certain distance between the sensor 120 and the light-transmitting area 112, allowing the infrared light emitted by the sensor 120 to diffuse first. Most of the infrared light passes directly through the light-transmitting area 112, while a small portion is reflected by the light-shielding area 111 and then passes through the light-transmitting area 112 again, improving the utilization rate of the infrared light. Alternatively, the support rib 113c can be omitted.

[0038] Optionally, each support rib 113c has a positioning part 113e on its support surface. The positioning part 113e is connected to the side wall of the receiving cavity and is positioned and engaged with the circumferential surface of the circuit board 122, thereby preventing the sensor 120 from moving radially relative to the first housing 113, thereby improving the relative stability between the sensor 120 and the first housing 113.

[0039] Optionally, both the infrared emitter 100 and the infrared receiver 200 can be fixed to the first door body 310 and the second door body 320 by means of adhesive bonding or other methods. Alternatively, in another optional embodiment, each snap-fit ​​post 114b has a snap-fit ​​portion 114f on its outer peripheral surface. The snap-fit ​​portion 114f is used to interference fit with the mounting groove on the first door body 310 or the second door body 320, so that both the infrared emitter 100 and the infrared receiver 200 can be detachably fixed to the first door body 310 and the second door body 320. This avoids fixing the infrared emitter 100 and the infrared receiver 200 to the first door body 310 and the second door body 320 by means of adhesive bonding, thereby simplifying the assembly efficiency of the infrared emitter 100 and the infrared receiver 200. Of course, the infrared emitter 100 and the infrared receiver 200 can also be fixed to the first door body 310 and the second door body 320 by means of screws or other methods.

[0040] Based on the infrared detection components disclosed in the embodiments of this application, this application also discloses a security gate, which includes a first gate body 310, a second gate body 320, and at least two sets of infrared detection components described in any of the above embodiments. A security passage is formed between the first gate body 310 and the second gate body 320. Infrared emitters 100 and infrared receivers 200 are arranged at intervals on both the first gate body 310 and the second gate body 320. The infrared emitters 100 on the first gate body 310 and the infrared receivers 200 on the second gate body 320 are opposite to each other to form a first set of infrared detection components. The infrared receivers 200 on the first gate body 310 and the infrared emitters 100 on the second gate body 320 are opposite to each other to form a second set of infrared detection components.

[0041] Optionally, the aforementioned security gate can be a millimeter-wave security gate, which has the characteristics of fast scanning imaging speed, comprehensive detection, safety and reliability, good privacy protection effect, and high detection accuracy. Of course, it can also be other types of security gates, and this application embodiment does not make specific limitations on this.

[0042] Optionally, the security gate also includes a top connection assembly 330, through which the first gate body 310 and the second gate body 320 are detachably connected.

[0043] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. An infrared detection component, applied to a security gate, characterized in that, The infrared detection assembly includes an infrared emitter (100) and an infrared receiver (200) arranged opposite to each other. Both the infrared emitter (100) and the infrared receiver (200) are installed on the first door body (310) and the second door body (320) of the security gate. The infrared emitter (100) on the first door body (310) and the infrared receiver (200) on the second door body (320) are opposite to each other to form a first set of infrared detection assemblies. The infrared receiver (200) on the first door body (310) and the infrared emitter (100) on the second door body (320) are opposite to each other to form a second set of infrared detection assemblies. Both the infrared emitter (100) and the infrared receiver (200) include a protective shell (110) and a sensor (120). At least a portion of the sensor (120) is disposed within the receiving cavity of the protective shell (110). The protective shell (110) has a connected light-shielding area (111) and a light-transmitting area (112). The light-shielding area (111) surrounds the light-transmitting area (112). The light-transmitting area (112) faces the security inspection channel of the security gate. The sensor (120) is opposite to the light-transmitting area (112).

2. The infrared detection component according to claim 1, characterized in that, The protective shell (110) includes a first shell (113), which has a cylindrical structure. The two opposite ends of the first shell (113) are respectively provided with the light-transmitting area (112) and the opening of the receiving cavity. The sensor (120) includes a connected device body (121) and a circuit board (122). The device body (121) is disposed in the receiving cavity and is opposite to the light-transmitting area (112). The circuit board (122) covers the opening of the receiving cavity to seal the receiving cavity. The central axis of the device body (121), the central axis of the light-transmitting area (112), and the central axis of the first housing (113) coincide.

3. The infrared detection component according to claim 2, characterized in that, The first housing (113) is a light-transmitting structure. The protective housing (110) also includes a second housing (114). The second housing (114) is a light-shielding structure. The second housing (114) faces the security check channel. The second housing (114) is provided with a clearance through hole (114a) opposite to the light-transmitting area (112). The second housing (114) has at least two snap-fit ​​posts (114b). The first end of each snap-fit ​​post (114b) extends to the side of the circuit board (122) away from the first housing (113) so that each snap-fit ​​post (114b) is snap-fitted with the circuit board (122). Each snap-fit ​​post (114b) is arranged at intervals along the circumference of the first housing (113).

4. The infrared detection component according to claim 3, characterized in that, The first housing (113) is provided with at least two clearance openings (113a), each clearance opening (113a) extends along the extension direction of the central axis of the receiving cavity, and the two ends of each clearance opening (113a) respectively penetrate the two opposite end faces of the first housing (113), and the first end of each snap-fit ​​post (114b) extends through each clearance opening (113a) to the side of the circuit board (122) away from the first housing (113).

5. The infrared detection component according to claim 3, characterized in that, The second housing (114) includes an annular body (114c) and the at least two snap-fit ​​posts (114b). Each snap-fit ​​post (114b) is disposed on the side of the annular body (114c) facing the first housing (113). The inner annular surface of the annular body (114c) forms the clearance through hole (114a). The side of the first housing (113) facing the annular body (114c) is provided with a protrusion (113d). At least a portion of the protrusion (113d) extends into the clearance through hole (114a). The light-transmitting area (112) is located in the protrusion (113d).

6. The infrared detection component according to claim 5, characterized in that, The second housing (114) further includes at least two positioning posts (114d), each of the positioning posts (114d) being disposed on the side of the annular body (114c) facing the first housing (113). The side of the first housing (113) facing the annular body (114c) is provided with at least two positioning grooves (113b). The positioning posts (114d) are arranged at intervals around the protrusion (113d). The positioning posts (114d) and the positioning grooves (113b) are positioned and engaged in the circumferential direction of the first housing (113). The positioning posts (114d) and the snap-fit ​​posts (114b) are arranged alternately in sequence along the circumferential direction of the first housing (113).

7. The infrared detection component according to claim 5, characterized in that, The annular body (114c) is located inside the security check channel. The annular body (114c) has an annular mounting groove (114e) on the side facing away from the security check channel. Each of the snap-fit ​​posts (114b) is located at the bottom of the annular mounting groove (114e). The first housing (113) includes a connected main body (113f) and a protrusion (113d). The protrusion (113d) is located on the side of the main body (113f) facing the second housing (114). A portion of the main body (113f) is located inside the annular mounting groove (114e) and cooperates with the annular mounting groove (114e).

8. The infrared detection component according to claim 2, characterized in that, The first housing (113) has at least two support ribs (113c) on its side wall. Each support rib (113c) is disposed in the receiving cavity. Each support rib (113c) is arranged at intervals along the circumference of the first housing (113). The height of each support rib (113c) is equal and the height of each support rib (113c) is less than the height of the receiving cavity. The circuit board (122) is supported on each support rib (113c). Each of the supporting ribs (113c) has a positioning part (113e) on its supporting surface. The positioning part (113e) is connected to the side wall of the receiving cavity and is positioned and engaged with the circumferential surface of the circuit board (122).

9. The infrared detection component according to claim 3, characterized in that, Each of the snap-fit ​​columns (114b) has a snap-fit ​​part (114f) on its outer peripheral surface. The snap-fit ​​part (114f) is used to have an interference fit with the mounting groove on the first door body (310) or the second door body (320) so that the infrared emitter (100) and the infrared receiver (200) can be detachably fixed to the first door body (310) and the second door body (320).

10. A security gate, characterized in that, The device includes a first door (310), a second door (320), and at least two sets of infrared detection components according to any one of claims 1 to 9. A security check channel is formed between the first door (310) and the second door (320). The first door (310) and the second door (320) are each provided with infrared emitters (100) and infrared receivers (200) arranged at intervals. The infrared emitters (100) on the first door (310) are opposite to the infrared receivers (200) on the second door (320) to form a first set of infrared detection components. The infrared receivers (200) on the first door (310) are opposite to the infrared emitters (100) on the second door (320) to form a second set of infrared detection components.

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