Double-layer door shielding structure

Abstract

The utility model relates to the technical field of doors, and discloses a double-layer door shielding structure which is good in shielding performance and comprises an inner-layer door frame, an outer-layer door plate hinged to the inner-layer door frame, a sealing module arranged between the inner-layer door frame and the outer-layer door plate, and a buckling module arranged between the inner-layer door frame and the outer-layer door plate. The sealing module comprises an installation frame arranged on the periphery of the inner-layer door frame, a beryllium copper reed set arranged on the installation frame and a double-blade frame arranged on the periphery of the outer-layer door plate, and the beryllium copper reed set comprises a first beryllium copper reed and a second beryllium copper reed, two sets of blades are arranged on the double-blade frame side by side, and the blades are clamped between the first beryllium copper reed and the second beryllium copper reed to achieve sealing between the inner-layer door frame and the outer-layer door plate.

Description

Technical Field

[0001] The utility model relates to the technical field of categories, in particular to a double-layer door shielding structure. Background Technique

[0002] Radio frequency identification technology is a wireless communication technology. The radio signal is transmitted through an electromagnetic field tuned to a radio frequency. It is a technology that transmits data from a tag attached to an item to automatically identify and track the item, without establishing mechanical or optical contact between the identification system and a specific target. It is widely used in the detection of items in cabinets to manage the items well. Since the tag contains electronically stored information and can be recognized within a few meters, in order to prevent the signal from recognizing tags outside the cabinet, a shielding door needs to be set between the identification area and the outside to shield the signal. However, there are usually certain gaps at the joint between the door body and the cabinet body of the shielding door, which may cause signal leakage and mis-identification of radio frequency tags outside. Currently, common shielding doors on the market do not take very effective measures to completely shield the signal. Some even still use the method of sticking rubber strips to the door seam to achieve the sealing and shielding effect. This rubber strip structure not only has a short service life, is easy to loosen and fall off, affecting the visual effect, but also cannot effectively shield radio frequency (RF) signals. Content of the Utility Model

[0003] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a double-layer door shielding structure with good shielding effect, which is convenient for installation and use on shielding equipment such as workshops.

[0004] The technical solution of the utility model is: a double-layer door shielding structure, including an inner door frame, an outer door panel hinged to the inner door frame, a sealing module and a buckling module arranged between the inner door frame and the outer door panel. The sealing module includes a mounting frame arranged around the inner door frame, a beryllium copper spring sheet group arranged on the mounting frame, and a double-blade frame arranged around the outer door panel. The beryllium copper spring sheet group includes a first beryllium copper spring sheet and a second beryllium copper spring sheet that are arranged face-to-face in pairs. Two groups of blades are arranged in parallel on the double-blade frame, and the blades are clamped between the first beryllium copper spring sheet and the second beryllium copper spring sheet to achieve the sealing between the inner door frame and the outer door panel.

[0005] As can be seen from the above solution, the inner door frame and the outer door panel are arranged opposite to each other. The blades on the double - blade frame are clamped between the first beryllium copper reed and the second beryllium copper reed, so as to achieve sealing through pressing. The beryllium copper material is used to provide shielding effects in a very wide frequency range. The present utility model mainly realizes the contact between the double - blade frame and the beryllium copper reed group by closing the door, performs double - layer extrusion, ensures the gap sealing performance of the door while achieving the double - layer shielding effect. Thereby improving and enhancing the overall radio frequency electromagnetic wave performance and anti - interference signal ability of the equipment, and providing a reliable radio frequency environment for testing products.

[0006] Two groups of installation grooves with open outer sides are arranged in parallel on the mounting frame. Pressing pads are arranged on the inner edges of both sides of the installation groove. The beryllium copper reed group is arranged in the installation groove. One end of the first beryllium copper reed and the second beryllium copper reed is fixed to the inner wall of the installation groove, and the other end is fixed between the pressing pad and the mounting frame. Thus, it can be seen that the beryllium copper reed group is installed in the installation groove, and the pressing pad is used to limit and fix the outer ends of the first beryllium copper reed and the second beryllium copper reed, preventing the outer door panel from loosening due to frequent opening and closing on the inner door frame.

[0007] A first rotary handle is arranged on the outer side of the outer door panel, and a second rotary handle is arranged on the inner side of the outer door panel. The first rotary handle and the second rotary handle are connected by a connecting rod. Thus, it can be seen that the first rotary handle and the second rotary handle rotate simultaneously through the connecting rod to open the outer door on the inner door frame.

[0008] The buckle module includes several buckle parts arranged on the outer door panel and several clamping blocks arranged on the inner door frame. A clamping chute adapted to the end of the buckle part is arranged on the clamping block, and the clamping block is synchronously connected with the connecting rod. Thus, it can be seen that the buckle between the buckle part and the clamping block realizes the locking of the outer door panel and the inner door frame. <000002

[0009] Several electromagnetic wave absorbing foam pads are arranged on the inner side of the outer door panel. Thus, it can be seen that the electromagnetic wave absorbing foam pads are used to absorb electromagnetic waves.

[0010] The double - blade frame includes a blade seat and the blades extending out of the blade seat. Embedding grooves adapted to the blade seat are arranged around the outer door panel. Thus, it can be seen that when the outer door panel and the inner door frame are buckled, the blades are respectively clamped and limited between the first beryllium copper reed and the second beryllium copper reed.

[0011] A number of jacks are equidistantly arranged inside the blade seat, and a number of through holes are vertically and equidistantly arranged in the blade seat between the two groups of blades. Thus, it can be seen that the jacks are used to limit and fix the blade seat on the outer layer door panel, and plugs are inserted into the through holes to realize the connection between the double-blade frames. Description of the Drawings

[0012] Figure 1 is a schematic structural diagram of the present invention;

[0013] Figure 2 is a schematic structural diagram of another perspective of the present invention;

[0014] Figure 3 is a schematic structural diagram of the present invention;

[0015] Figure 4 is a sectional view of the present invention;

[0016] Figure 5 is Figure 4 a schematic structural diagram of part A in

[0017] Figure 6 is Figure 4 a schematic structural diagram of part B in

[0018] Figure 7 is a schematic diagram of the sealing structure. Detailed Embodiment

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention.

[0020] As Figures 1 to 7 shown, the present invention is a double-layer door shielding structure, including an inner layer door frame 1, an outer layer door panel 2 hinged to the inner layer door frame 1, a sealing module 3 arranged between the inner layer door frame 1 and the outer layer door panel 2, and a buckle module. The sealing module 3 includes a mounting frame 4 arranged around the inner layer door frame 1, a beryllium copper spring sheet group 5 arranged on the mounting frame 4, and a double-blade frame 6 arranged around the outer layer door panel 2. The beryllium copper spring sheet group 5 includes a first beryllium copper spring sheet 51 and a second beryllium copper spring sheet 52 that are arranged face-to-face in opposite directions in pairs. Two groups of blades 63 are arranged in parallel on the double-blade frame 6. The blades 63 are clamped between the first beryllium copper spring sheet 51 and the second beryllium copper spring sheet 52 to realize the sealing between the inner layer door frame and the outer layer door panel 2. A number of absorbing foam 10 are arranged on the inner side of the outer layer door panel 2.

[0021] In this embodiment, the first beryllium copper reed 51 and the second beryllium copper reed 52 are mounted opposite each other. Both the first beryllium copper reed 51 and the second beryllium copper reed 52 are arranged in an arc-shaped arch. The designed distance ensures that the arched portions of the beryllium copper reed group 5 contact each other, improving shielding performance. The inner layer structure is the same, ensuring double shielding effectiveness. The double-blade frame 6, through the two sets of blades 63, is better pressed into the door frame structure, while also ensuring that the compression of the beryllium copper reed is within the range of approximately 30%, thereby improving and enhancing the overall RF electromagnetic wave performance and anti-interference signal capability of the device. The absorbing foam 10 is a pyramidal absorbing foam and is arranged on the inner side of the outer door panel 2 via a gasket. At 90MHz, the shielding effectiveness reaches 114dB. The operation method of this utility model utilizes hinge rotation and buckle module clamping and fixing, ensuring a reliable RF test equipment environment.

[0022] The mounting frame 4 is provided with two groups of mounting grooves 41 with outward openings in parallel, and pressure pads 7 are provided on both inner edges of the mounting grooves 41. The beryllium copper spring group 5 is arranged in the mounting grooves 41. One end of the first beryllium copper spring 51 and the second beryllium copper spring 52 is fixed to the inner wall of the mounting groove 41, and the other end is fixed between the pressure pad 7 and the mounting frame 4.

[0023] A first rotating handle 8 is provided on the outside of the outer door panel 2, and a second rotating handle 9 is provided on the inside of the outer door panel 2. The first rotating handle 8 and the second rotating handle 9 are connected by a connecting rod. In this embodiment, the first rotating handle 8 and the second rotating handle 9 each include a rotating portion and a handle portion, and the rotating portion is connected to the connecting rod.

[0024] The locking module includes a plurality of locking members 14 provided on the outer door panel 2 and a plurality of locking blocks 13 provided on the inner door frame 1. The locking blocks 13 are provided with locking slots 131 adapted to the ends of the locking members 14. The locking blocks 13 are synchronously connected to the connecting rod. In this embodiment, three groups of the locking blocks 13 and the locking members 14 are provided. When the first rotating handle 8 is rotated, the second rotating handle 9 rotates synchronously, thereby driving the plurality of locking blocks 13 to slide synchronously on the locking slots 131 to lock and lock, thereby closing the door.

[0025] The double-blade frame 6 includes a blade seat 61 and the blade 63 extending from the blade seat 61 . The outer door panel 2 is provided with embedding grooves 21 adapted to the blade seat 61 around its periphery.

[0026] A plurality of insertion holes 64 are equidistantly provided in the blade seat 61 , and a plurality of through holes 65 are vertically equidistantly provided between the two groups of blades 63 in the blade seat 61 .

[0027] The working process of the present utility model is as follows: By rotating the first rotating handle 8, the first rotating handle 8 drives the second rotating handle 9 to rotate. The second rotating handle 9 drives three groups of buckle members 14 to slide into the buckle chute 131 on the buckle block 13, thereby buckling and locking the outer door panel 1 and the inner door frame 2 to achieve the closed door state. By closing the door, two blades 63 on the double-blade frame 6 are inserted between the first beryllium copper spring piece 51 and the second beryllium copper spring piece 52. The two sides of the blade 63 are respectively in contact with the first beryllium copper spring piece 51 and the second beryllium copper spring piece 52 for double-layer extrusion, ensuring the gap sealing performance of the door.

[0028] It should be noted that the double-door structure adopted by the present utility model ensures that the first beryllium copper spring piece 51 and the second beryllium copper spring piece 52 are compressed within the range of 15% to 50% by respectively inserting two blades 63 into two groups of beryllium copper spring piece groups 5. The compression resistance is very small, the electrical conductivity is good, and it meets the difference of large gaps. The present utility model can provide double-layer shielding effectiveness, achieve radio frequency interference protection, and thus provide a stable radio frequency test environment. It plays a very good role in improving the shielding effect of the equipment. The internal installation of beryllium copper materials can provide shielding effects in a very wide frequency range. It has a very high deviation range in mechanical properties, a long lifespan, fatigue resistance characteristics, excellent electrical conductivity, a long life cycle and meets the difference of large gaps. It is the best material for attenuation and is mainly applied to radio frequency structures, large shielding doors, shielding boxes, and equipment structures to provide a stable test environment for radio frequency tests. The shielding effectiveness > 90 dB / 90 MHz plane wave.

[0029] Finally, it should be emphasized that the above description is not intended to limit the present utility model. For those skilled in the art, the present utility model can have various changes and modifications. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A double-door shielding structure, characterized by: The invention comprises an inner door frame (1), an outer door panel (2) hinged to the inner door frame (1), a sealing module (3) and a buckle module arranged between the inner door frame (1) and the outer door panel (2); the sealing module (3) comprises a mounting frame (4) arranged around the inner door frame (1), a beryllium copper reed group (5) arranged on the mounting frame (4), and a double-blade frame (6) arranged around the outer door panel (2); the beryllium copper reed group (5) comprises a first beryllium copper reed (51) and a second beryllium copper reed (52) arranged in face contact with each other; two groups of blades (63) are arranged in parallel on the double-blade frame (6); the blades (63) are sandwiched between the first beryllium copper reed (51) and the second beryllium copper reed (52) to achieve sealing between the inner door frame (1) and the outer door panel (2).

2. The double-door shielding structure according to claim 1, characterized in that: The mounting frame (4) is provided with two groups of mounting grooves (41) with outer openings in parallel, and pressure pads (7) are provided on both inner edges of the mounting grooves (41). The beryllium copper reed group (5) is arranged in the mounting grooves (41), and one end of the first beryllium copper reed (51) and the second beryllium copper reed (52) are fixed to the inner wall of the mounting groove (41), and the other end is fixed between the pressure pad (7) and the mounting frame (4).

3. The double-door shielding structure according to claim 1, characterized in that: A first rotating handle (8) is provided on the outside of the outer door panel (2), and a second rotating handle (9) is provided on the inside of the outer door panel (2); the first rotating handle (8) and the second rotating handle (9) are connected via a connecting rod.

4. The double-door shielding structure according to claim 3, characterized in that: The buckling module comprises a plurality of buckling members (14) arranged on the outer door panel (2) and a plurality of latching blocks (13) arranged on the inner door frame (1); the latching blocks (13) are provided with latching slots (131) adapted to the ends of the buckling members (14); and the latching blocks (13) are synchronously connected to the connecting rod.

5. The double-door shielding structure according to claim 1, characterized in that: A plurality of wave-absorbing foams (10) are arranged on the inner side of the outer door panel (2).

6. The double-door shielding structure according to claim 1, characterized in that: The double-blade frame (6) comprises a blade seat (61) and the blade (63) extending from the blade seat (61); and the outer door panel (2) is provided with embedding grooves (21) adapted to the blade seat (61) around its periphery.

7. The double-door shielding structure according to claim 6, characterized in that: A plurality of insertion holes (64) are equidistantly arranged in the blade seat (61), and a plurality of through holes (65) are vertically equidistantly arranged in the blade seat (61) between the two groups of blades (63).

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