Magnetic field shielding assembly, security check door plate and security check door

Abstract

The utility model relates to a magnetic field shielding assembly, a security check door plate and a security check door, which comprise a magnetic field shielding layer and a first coil layer, one surface of the magnetic field shielding layer is a reflecting surface, and the reflecting surface and the first coil layer are oppositely arranged. The projection of the first coil layer on the reflecting surface is located in the reflecting surface and is spaced from the edge of the reflecting surface.

Description

Technical Field

[0001] The utility model relates to the field of security inspection doors, in particular to a magnetic field shielding component, a security inspection door plate and a security inspection door. Background Art

[0002] The security door is one of the main detection methods in the existing security inspection scene. The door panel is equipped with a metal transceiver coil. The transmitting coil forms a low-frequency spatial magnetic field at the KHz level through an alternating current, and the receiving coil generates an induced current through the low-frequency spatial magnetic field and transmits it back to the detection mainboard. When a metal object passes through the detection channel, it will cause the spatial magnetic field to change, and the induced current generated by the receiving coil will also change accordingly, so that the detection mainboard will sound an alarm.

[0003] The low-frequency spatial magnetic field not only covers the detection channel, but also partially covers the outside of the detection channel. Therefore, when a person carrying metal passes by outside the detection channel, it will also cause changes in the spatial magnetic field, resulting in false alarms. Utility Model Content

[0004] Based on this, it is necessary to provide a magnetic field shielding component, a security door panel and a security door to address the problem of high frequency of false alarms of the security door.

[0005] A magnetic field shielding component comprises a magnetic field shielding layer and a first coil layer, wherein one side of the magnetic field shielding layer is a reflecting surface, the reflecting surface and the first coil layer are arranged opposite to each other, and the projection of the first coil layer on the reflecting surface is located within the reflecting surface and is spaced apart from the edge of the reflecting surface.

[0006] The magnetic field shielding assembly of the utility model further comprises a partition, and the reflecting surface and the first coil layer are respectively attached to two surfaces of the partition.

[0007] At least part of the edge of the partition of the utility model is exposed on the reflecting surface.

[0008] The magnetic field shielding assembly of the utility model further comprises a box body, wherein the magnetic field shielding layer, the first coil layer and the partition are all arranged in the box body;

[0009] The box body has a first inner wall surface and a second inner wall surface, a surface of the magnetic field shielding layer facing away from the partition is attached to the first inner wall surface, and an edge of the partition is in contact with the second inner wall surface.

[0010] The box body of the utility model further comprises a third inner wall surface arranged opposite to the first inner wall surface, and the first coil layer and the third inner wall surface are arranged at intervals.

[0011] A security door panel comprises a panel body, a second coil layer and a magnetic field shielding assembly, wherein the second coil layer is located within the panel body, the magnetic field shielding layer and the first coil layer are mounted on the outer wall of the panel body, and the magnetic field shielding layer is located on a side of the first coil layer away from the panel body.

[0012] In the utility model, the projection of the second coil layer on the reflecting surface is located inside the reflecting surface and is spaced apart from the edge of the reflecting surface.

[0013] In the present invention, the second coil layer is parallel to the first coil layer.

[0014] A security door comprises two security door plates, wherein the two plates are arranged opposite to each other and at intervals, and the magnetic field shielding assembly is located outside the two plates.

[0015] The security door of the utility model further comprises a control box, and the two plates are fixed by the control box so that the first coil layer and the second coil layer are electrically connected to the control box.

[0016] The beneficial effects of the present invention include at least one of the following:

[0017] 1. The magnetic field shielding layer can block and reflect the magnetic field generated by the first coil layer and the second coil layer, so that the magnetic field generated by the first coil layer and the second coil layer can be confined within the security inspection channel formed by the two security inspection door panels, thereby reducing the interference of the metal outside the security inspection channel on the magnetic field generated by the second coil layer and reducing the occurrence of false alarms of the security inspection door;

[0018] 2. The magnetic fields generated by the first coil layer and the second coil layer can couple with each other, thereby increasing the magnetic field strength in the security inspection channel;

[0019] 3. The magnetic field shielding component is a modular unit, which is convenient for the transformation and upgrading of existing security doors. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic cross-sectional structure diagram of the magnetic field shielding assembly in Example 1 of the utility model;

[0021] Figure 2 It is a three-dimensional diagram of the magnetic field distribution of the magnetic field shielding assembly in Example 1 of the utility model;

[0022] Figure 3 This is a front view of the magnetic field distribution of the magnetic field shielding assembly in Example 1 of the utility model;

[0023] Figure 4 This is a schematic diagram of the three-dimensional structure of the security door in Example 1 of the utility model;

[0024] Figure 5The three-dimensional distribution of the magnetic field of the second coil layer before the installation of the magnetic field shielding component in Example 1 of the utility model Figure 1 (The second coil layer is in the shape of a square);

[0025] Figure 6 The main distribution of the magnetic field of the second coil layer before installing the magnetic field shielding assembly in Example 1 of the utility model Figure 1 (The second coil layer is in the shape of a square);

[0026] Figure 7 The main distribution of the magnetic field of the second coil layer after the magnetic field shielding assembly is installed in Example 1 of the utility model Figure 1 (The second coil layer is in the shape of a square);

[0027] Figure 8 The three-dimensional distribution of the magnetic field of the second coil layer before the installation of the magnetic field shielding component in Example 1 of the utility model Figure 2 (The second coil layer is in the shape of a figure 8);

[0028] Fig. 9 The main distribution of the magnetic field of the second coil layer before installing the magnetic field shielding assembly in Example 1 of the utility model Figure 2 (The second coil layer is in the shape of a figure 8);

[0029] Fig.10 The main distribution of the magnetic field of the second coil layer after the magnetic field shielding assembly is installed in Example 1 of the utility model Figure 2 (The second coil layer is in the shape of a figure 8).

[0030] Reference numerals:

[0031] 1. Magnetic field shielding layer; 11. Reflection surface; 2. First coil layer; 3. Partition; 4. Box; 41. First inner wall surface; 42. Second inner wall surface; 43. Third inner wall surface; 5. Plate; 6. Second coil layer; 7. Control box. DETAILED DESCRIPTION

[0032] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0033] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0034] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0035] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0037] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0038] Embodiment 1:

[0039] See also Figure 1 , a magnetic field shielding component, includes a magnetic field shielding layer 1 and a first coil layer 2. The magnetic field shielding layer 1 is a rectangular plate, and its material is the existing technology, which will not be repeated in this embodiment. The magnetic field shielding layer 1 has the function of blocking the magnetic field. One side of the magnetic field shielding layer 1 is a reflecting surface 11. The reflecting surface 11 and the first coil layer 2 are arranged opposite to each other, and the relative direction of the reflecting surface 11 and the first coil layer 2 is a first direction. The size of the first coil layer 2 is smaller than the size of the reflecting surface 11, so the projection of the first coil layer 2 on the reflecting surface 11 along the first direction is located inside the reflecting surface 11, and the projection of the first coil layer 2 on the reflecting surface 11 along the first direction is spaced from the edge of the reflecting surface 11, that is, the edge of the reflecting surface 11 is located outside the projection of the first coil layer 2 on the reflecting surface 11. Correspondingly, see Figure 2 and Figure 3 The magnetic flux lines generated by the first coil layer 2 can be reflected at the edge of the reflection surface 11 , thereby causing the magnetic field generated by the first coil layer 2 to be concentrated on the side of the reflection surface 11 close to the first coil layer 2 .

[0040] See also Figure 4 This embodiment also provides a security door. The security door includes two security door panels and a control box 7. Each security door panel includes a plate body 5, and accordingly, the two security door panels have two plate bodies 5 in total. The plate bodies 5 are perpendicular to the horizontal plane, and the two plate bodies 5 are arranged oppositely and spaced apart, so that the two plate bodies 5 enclose a security inspection passage. The control box 7 is installed on the top of the two plate bodies 5 so that the two plate bodies 5 are fixed through the control box 7.

[0041] Each security door panel also includes a plurality of second coil layers 6 and a magnetic field shielding assembly, and the second coil layers 6, magnetic field shielding assembly and plate body 5 in each security door panel correspond to each other. The first coil layer 2 and the second coil layer 6 are electrically connected to the control box 7 .

[0042] The plate body 5 is hollow inside, the second coil layer 6 is arranged in the corresponding plate body 5, the magnetic field shielding assembly is installed on the outer wall of the corresponding plate body 5 away from the security inspection channel, and the magnetic field shielding layer 1 is located on the side of the first coil layer 2 away from the plate body 5, and correspondingly, the first coil layer 2 is located between the magnetic field shielding layer 1 and the corresponding second coil layer 6. Thus, the magnetic field generated by the first coil layer 2 can be coupled with the magnetic field generated by the second coil layer 6, so as to enhance the magnetic field strength in the security inspection channel. In addition, the reflective surface 11 can reflect and block the magnetic flux lines generated by the first coil layer 2 and the second coil layer 6, so that the magnetic field is concentrated in the security inspection channel, reducing or preventing the magnetic field in the security inspection channel from overflowing to the outside of the security inspection channel, thereby reducing the interference of the metal outside the security inspection channel on the magnetic field generated by the first coil layer 2 and the second coil layer 6, and reducing the occurrence of false alarms.

[0043] Figure 5 and Figure 6 The second coil layer 6 is in the shape of a square. Before the magnetic field shielding assembly is installed on the plate body 5, the magnetic flux lines generated by the second coil layer 6 are located outside the security inspection channel. Figure 7 When the magnetic field shielding assembly is installed on the plate body 5, the magnetic field shielding layer 1 reflects the magnetic flux lines generated by the second coil layer 6 and the first coil layer 2, reducing the diffusion of the magnetic flux lines generated by the second coil layer 6 and the first coil layer 2 to the outside of the security inspection channel, thereby effectively limiting the magnetic field between the two magnetic field shielding layers 1.

[0044] Figure 8 and Fig. 9 The second coil layer 6 is in the shape of an 8. Before the magnetic field shielding assembly is installed on the plate body 5, the magnetic flux lines generated by the second coil layer 6 are also partially located outside the security inspection channel. Fig.10 When the magnetic field shielding assembly is installed on the plate body 5, the magnetic field shielding layer 1 also reflects the magnetic flux lines generated by the second coil layer 6 and the first coil layer 2, reducing the diffusion of the magnetic flux lines generated by the second coil layer 6 and the first coil layer 2 to the outside of the security inspection channel, thereby effectively limiting the magnetic field between the two magnetic field shielding layers 1.

[0045] Combination Figure 7 and Fig.10 It can be found that in order for the magnetic field shielding layer 1 to effectively reflect the magnetic field generated by the second coil layer 6, it is necessary to make the projection of the second coil layer 6 on the reflecting surface 11 along the first direction be located within the reflecting surface 11, and the projection of the second coil layer 6 on the reflecting surface 11 along the first direction be spaced from the edge of the reflecting surface 11.

[0046] Furthermore, in order to enhance the coupling effect between the magnetic field generated by the second coil layer 6 and the magnetic field generated by the first coil layer 2 , the second coil layer 6 may be made parallel to the first coil layer 2 .

[0047] The magnetic field shielding assembly of this embodiment further includes a partition 3, which is disposed between the magnetic field shielding layer 1 and the first coil layer 2. The reflective surface 11 and the first coil layer 2 are respectively attached to the two sides of the partition 3, so that the first coil layer 2 can be spaced apart from the reflective surface 11. The reflective surface 11 and the first coil layer 2 can be attached to the partition 3 in an adhesive manner. The material of the partition 3 can be wood to avoid affecting the magnetic field distribution.

[0048] If the reflective surface 11 and the first coil layer 2 are adhered to the partition 3, at least part of the edge of the partition 3 is exposed to the reflective surface 11. Therefore, in some other embodiments, the edge of the partition 3 can be fixed to the outer wall of the plate body 5 by non-magnetic fasteners such as plastic screws. This connection method can avoid damage to the magnetic field shielding layer 1 and ensure the reflection effect of the magnetic field shielding layer 1 on the magnetic flux lines.

[0049] In this embodiment, the magnetic field shielding assembly further includes a box body 4, and the magnetic field shielding layer 1, the first coil layer 2 and the partition 3 are all arranged in the box body 4 to prevent the magnetic field shielding layer 1 and the first coil layer 2 from being exposed, thereby obtaining protection. The box body 4 can also be made of non-magnetic materials such as wood to avoid affecting the magnetic field distribution.

[0050] The box body 4 has a first inner wall surface 41, a second inner wall surface 42 and a third inner wall surface 43. The first inner wall surface 41 and the third inner wall surface 43 are arranged opposite to each other and spaced apart in the first direction, and the second inner wall surface 42 is located between the first inner wall surface 41 and the third inner wall surface 43. The magnetic field shielding layer 1 has a certain elasticity, so the side of the magnetic field shielding layer 1 away from the partition 3 can fit the first inner wall surface 41, and the edge of the partition 3 abuts on the second inner wall surface 42 and is fixed to the second inner wall surface 42, so that the magnetic field shielding layer 1 is pressed on the first inner wall surface 41, thereby improving the positioning effect of the magnetic field shielding layer 1 in the box body 4. The partition 3 can be fixed on the outer wall of the plate body 5 through the box body 4.

[0051] Further preferably, the first coil layer 2 and the third inner wall surface 43 are spaced apart, so that the first coil layer 2 can ensure a sufficient distance from the second coil layer 6 , thereby ensuring a coupling effect between the magnetic field generated by the first coil layer 2 and the magnetic field generated by the second coil layer 6 .

[0052] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0053] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A magnetic field shielding assembly, characterized in that: It comprises a magnetic field shielding layer (1) and a first coil layer (2), one side of the magnetic field shielding layer (1) is a reflection surface (11), the reflection surface (11) and the first coil layer (2) are arranged opposite to each other, and the projection of the first coil layer (2) on the reflection surface (11) is located within the reflection surface (11) and is spaced from the edge of the reflection surface (11).

2. The magnetic field shielding assembly according to claim 1, characterized in that: The magnetic field shielding assembly also includes a partition (3), and the reflection surface (11) and the first coil layer (2) are respectively attached to two surfaces of the partition (3).

3. The magnetic field shielding assembly according to claim 2, characterized in that: At least part of the edge of the partition (3) is exposed on the reflecting surface (11).

4. The magnetic field shielding assembly according to claim 3, characterized in that: The magnetic field shielding assembly further comprises a box (4), wherein the magnetic field shielding layer (1), the first coil layer (2) and the partition plate (3) are all arranged in the box (4); The box body (4) has a first inner wall surface (41) and a second inner wall surface (42); a side of the magnetic field shielding layer (1) facing away from the partition (3) is attached to the first inner wall surface (41); and an edge of the partition (3) abuts against the second inner wall surface (42).

5. The magnetic field shielding assembly according to claim 4, characterized in that: The box body (4) further comprises a third inner wall surface (43) arranged opposite to the first inner wall surface (41), and the first coil layer (2) and the third inner wall surface (43) are arranged at intervals.

6. A security door panel, characterized in that: It comprises a plate body (5), a second coil layer (6) and a magnetic field shielding assembly according to any one of claims 1 to 5, wherein the second coil layer (6) is located inside the plate body (5), the magnetic field shielding layer (1) and the first coil layer (2) are mounted on the outer wall of the plate body (5), and the magnetic field shielding layer (1) is located on a side of the first coil layer (2) facing away from the plate body (5).

7. The security door panel according to claim 6, characterized in that: The projection of the second coil layer (6) on the reflective surface (11) is located within the reflective surface (11) and is spaced apart from the edge of the reflective surface (11).

8. The security door panel according to claim 7, characterized in that: The second coil layer (6) is parallel to the first coil layer (2).

9. A security door, characterized in that: It comprises two security door panels as claimed in claim 6, wherein the two panels (5) are arranged opposite to each other and spaced apart, and the magnetic field shielding assembly is located outside the two panels (5).

10. The security door according to claim 9, characterized in that: The security door further comprises a control box (7), and the two plates (5) are fixed via the control box (7) so that the first coil layer (2) and the second coil layer (6) are electrically connected to the control box (7).

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