Shielding box

Abstract

The utility model discloses a shielding box. Comprising a bottom plate, a circuit board, a middle plate and a cover plate which are sequentially arranged from bottom to top, the rear side of the shielding box is provided with at least one set of signal receiving ends and signal output ends, the circuit board is provided with a radio frequency signal isolation switch, and the bottom plate and the middle plate are each provided with a signal amplification power division cavity and a signal on-off control cavity which are matched with the radio frequency signal isolation switch. According to the radio frequency signal isolation switch, the on-off state between the signal receiving end and the signal output end can be flexibly controlled, so that the signal path is dynamically adjusted according to actual requirements, and signal interference and energy loss are effectively avoided. The signal amplification power division cavity and the signal on-off control cavity are arranged, so that the signal receiving and outputting performance is enhanced, and meanwhile, the accuracy and isolation of signals are ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of communication, in particular to a shielding box. BACKGROUND

[0002] With the rapid progress of modern electronic technology, especially the widespread deployment of wireless communication, Internet of Things and 5G technology, the integration and complexity of electronic devices continue to rise, putting higher requirements on electromagnetic compatibility and signal integrity. As a core electronic component in the communication field, the design and optimization of the shielding box become particularly critical. The shielding box not only effectively isolates external electromagnetic interference, protecting the internal circuit from external environmental interference, but also ensures the stability and accuracy of the signal during transmission.

[0003] The shielding box usually adopts metal materials, increases the thickness of the shielding layer, or optimizes the shape of the shielding box, to reduce electromagnetic leakage and interference as much as possible. However, with the increase of communication frequency and the increasing complexity of system functions, relying solely on physical shielding cannot meet the growing demand for signal processing. Especially in high-density integrated miniaturized electronic devices, it is difficult to achieve efficient and accurate signal transmission and control in limited space. CONTENT OF THE UTILITY MODEL

[0004] The technical problem solved by the present application is to provide a shielding box that solves the problem of difficulty in achieving efficient and accurate signal transmission and control in limited space in high-density integrated miniaturized electronic devices.

[0005] To solve the above technical problems, one technical solution adopted by the present application is to provide a shielding box, comprising a bottom plate, a circuit board, an intermediate plate and a cover plate arranged in turn from bottom to top, at least one group of signal receiving ends and signal output ends are arranged on the side surface of the shielding box, the signal receiving ends and the signal output ends are electrically connected with the circuit board, a radio frequency signal isolation switch is arranged on the circuit board, the radio frequency signal isolation switch is used to control the on-off between the signal receiving ends and the signal output ends, signal amplification power division cavities and signal on-off control cavities adapted to the radio frequency signal isolation switch are arranged on the bottom plate and the intermediate plate, the signal amplification power division cavities correspond to the signal receiving ends, and the signal on-off control cavities correspond to the signal output ends.

[0006] In some embodiments, the bottom plate and the intermediate plate are each provided with a first protrusion, the first protrusion is longitudinally arranged, and the first protrusion is arranged between the signal amplification power division cavities and the signal on-off control cavities to separate the signal amplification power division cavities and the signal on-off control cavities.

[0007] In some embodiments, the signal amplification power division cavity comprises a first power division zone and a second power division zone, and the first power division zone is adjacent to the signal receiving end.

[0008] In some embodiments, a second protrusion is further provided on the base plate and the intermediate plate. The second protrusion is arranged laterally and connected between the first protrusion and the frame of the base plate or the intermediate plate. The second protrusion is used to divide the signal on / off control cavity into a first control area and a second control area. The first control area is adjacent to the signal output terminal. A radio frequency signal isolation switch is respectively provided in the first control area and the second control area.

[0009] In some embodiments, two sets of signal receiving terminals and signal output terminals are provided on the rear side of the shielding box, and two pairs of radio frequency signal isolation switches are provided on the circuit board. One set of signal receiving terminals, signal output terminals and a pair of radio frequency signal isolation switches are located on the left side of the shielding box for receiving and outputting a first signal, and the other set of signal receiving terminals, signal output terminals and a pair of radio frequency signal isolation switches are located on the right side of the shielding box for receiving and outputting a second signal.

[0010] In some embodiments, a third protrusion is provided on the base plate and the middle plate. The third protrusion is longitudinally disposed in the middle of the shielding box and is used to separate the signal amplification and power splitter cavity on the left and the signal amplification and power splitter cavity on the right.

[0011] In some embodiments, a device connection terminal is provided on the front side of the shielding box. The device connection terminal is used to connect to a sampling device. A signal selection circuit is provided on the circuit board inside the device connection terminal. The signal selection circuit is electrically connected to the radio frequency signal isolation switches on the left and right sides respectively. The signal selection circuit is used to select to input the first signal or the second signal to the sampling device.

[0012] In some embodiments, the third protrusion includes a main protrusion, a first branch protrusion, and a second branch protrusion. The main protrusion is adjacent to the signal receiving end and is used to separate the first power zone and the second power zone. The first branch protrusion and the second branch protrusion extend from the inner end of the main protrusion. The first branch protrusion and the second branch protrusion first extend laterally away from the main protrusion and then extend longitudinally forward. The first branch protrusion and the second branch protrusion, together with the frame of the base plate or the middle plate, form a signal selection cavity, which corresponds to the signal selection circuit.

[0013] In some embodiments, the rear frame of the intermediate plate extends downward to form a first extension edge, the lower end face of which is flush with the upper end face of the base plate and the lower end face of the circuit board; the rear frame of the intermediate plate extends upward to form a second extension edge, the upper end face of which is flush with the upper end face of the cover plate.

[0014] In some embodiments, the rear side of the shielding box is further provided with a plurality of connectors, the height of the connectors is matched with the height of the shielding box, and the connectors connect the signal receiving end or the signal output end with the shielding box.

[0015] The application has the following beneficial effects: In the application, the rear side of the shielding box is provided with at least one set of signal receiving end and signal output end, and the ports are electrically connected with the radio frequency signal isolation switch on the circuit board. The radio frequency signal isolation switch can flexibly control the on-off state between the signal receiving end and the signal output end, so as to dynamically adjust the signal path according to the actual demand, effectively avoiding signal interference and energy loss. The signal amplification power division cavity and the signal on-off control cavity are arranged, which enhances the performance of signal receiving and outputting, and ensures the accuracy and isolation of the signal. The signal amplification power division cavity corresponds to the signal receiving end, and the radio frequency signal isolation switch at the signal amplification power division cavity is responsible for receiving and amplifying external signals to meet the demand of complex signal processing. The signal on-off control cavity corresponds to the signal output end, and the radio frequency signal isolation switch corresponding to the signal on-off control cavity controls the output time and path of the signal, thereby significantly improving the electromagnetic compatibility and signal processing capacity of the shielding box, and ensuring the accuracy and reliability of the signal in the transmission process. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a structural schematic diagram of the front side according to an embodiment of the application;

[0017] Figure 2 is a structural schematic diagram of the rear side according to an embodiment of the application;

[0018] Figure 3 is an exploded structural schematic diagram according to an embodiment of the application;

[0019] Figure 4 is a structural schematic diagram of the middle plate according to an embodiment of the application;

[0020] Figure 5 is a top view structural schematic diagram of the middle plate according to an embodiment of the application;

[0021] Figure 6 is a bottom view structural schematic diagram of the middle plate according to an embodiment of the application;

[0022] Figure 7 is a side view structural schematic diagram of the middle plate according to an embodiment of the application;

[0023] Figure 8 is a top view structural schematic diagram of the bottom plate according to an embodiment of the application. DETAILED DESCRIPTION

[0024] In order for the person skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by the person skilled in the art without creative labor fall within the scope of protection of the present application.

[0025] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another component, it can be directly on the other component or indirectly disposed on the other component; when a component is referred to as being "connected to" another component, it can be directly connected to the other component or indirectly connected to the other component.

[0026] It should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "vertical", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or component referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0027] In addition, the terms "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" and "several" is two or more, unless otherwise explicitly specified.

[0028] It should be understood that the structures, proportions, sizes, etc. shown in the drawings of the present specification are only used to cooperate with the content disclosed in the specification, to enable persons skilled in the art to understand and read, and do not have technical significance, and any modification of the structure, change of the proportion relationship or adjustment of the size, without affecting the effect and purpose that can be achieved by the present application, should still fall within the scope of the technical content disclosed by the present application.

[0029] For the description of the present application, the labels "front", "back", "upper", "lower", "left", "right" shown in the drawings are used to facilitate the understanding of the embodiments, and are not intended to limit the present application. Among them, the front-back direction represents the longitudinal direction, the left-right direction represents the transverse direction, and the up-down direction represents the vertical direction. Figure 1

[0030] Figures 1-8 ​An embodiment of the shielding box is shown, including a bottom plate 1, a circuit board 2, an intermediate plate 3 and a cover plate 4 arranged in turn from bottom to top, at least one set of signal receiving end 5 and signal output end 6 are arranged on the back side of the shielding box, the signal receiving end 5 can be connected with an antenna, the signal output end 6 can be connected with an external device, the signal receiving end 5 and the signal output end 6 are electrically connected with the circuit board 2, a radio frequency signal isolation switch (not shown in the figure) is arranged on the circuit board 2, the radio frequency signal isolation switch is used to control the on-off between the signal receiving end 5 and the signal output end 6, on the bottom plate 1 and the intermediate plate 3, a signal amplification power division cavity 31 and a signal on-off control cavity 32 adapted to the radio frequency signal isolation switch are arranged, the signal amplification power division cavity 31 corresponds to the signal receiving end 5, and the signal on-off control cavity 32 corresponds to the signal output end 6. Here, "corresponding" means that the two structures are correspondingly arranged in space, that is, the position of the signal receiving end 5 corresponds to the position of the signal amplification power division cavity 31, and the position of the signal output end 6 corresponds to the position of the signal on-off control cavity 32.

[0031] In the present application, at least one set of signal receiving end 5 and signal output end 6 are arranged on the back side of the shielding box, and these ports are electrically connected with the radio frequency signal isolation switch on the circuit board 2. The radio frequency signal isolation switch can flexibly control the on-off state between the signal receiving end 5 and the signal output end 6, thereby dynamically adjusting the signal path according to actual needs, effectively avoiding signal interference and energy loss. In order to enhance the signal processing capability, the bottom plate 1 and the intermediate plate 3 are respectively provided with signal amplification power division cavities 31 and signal on-off control cavities 32 adapted to the radio frequency signal isolation switch. The arrangement of the signal amplification power division cavities 31 and the signal on-off control cavities 32 enhances the performance of signal receiving and outputting, while ensuring the accuracy and isolation of the signal. The signal amplification power division cavities 31 correspond to the signal receiving end 5, and the corresponding radio frequency signal isolation switch at the signal amplification power division cavities 31 is responsible for receiving and amplifying external signals to meet the needs of complex signal processing. The signal on-off control cavities 32 correspond to the signal output end 6, and the corresponding radio frequency signal isolation switch of the signal on-off control cavities 32 controls the output timing and path of the signal, thereby significantly improving the electromagnetic compatibility and signal processing capability of the shielding box, and ensuring the accuracy and reliability of the signal in the transmission process.

[0032] In some embodiments, the radio frequency signal isolation switch can be the radio frequency signal isolation switch disclosed in the patent with application number 2023100470006 and application name: a radio frequency signal isolation switch, device, communication system and method. The radio frequency signal isolation switch can identify interference or fraudulent signals in the radio frequency signal, thereby controlling the on-off between the signal receiving end 5 and the signal output end 6, avoiding the situation that the interference or fraudulent signals cannot be effectively disconnected after the interference or fraudulent signals exist, causing the receiving device at the back end to receive incorrect information. Thus, the interference or fraudulent signals are prevented from being output to other devices.

[0033] In some embodiments, as shown in Figure 3 , Figure 4 and Figure 5 , the bottom plate 1 and the intermediate plate 3 are both provided with a first protrusion 33, the first protrusion 33 is longitudinally arranged, and the first protrusion 33 is arranged between the signal amplification power division cavity 31 and the signal on-off control cavity 32, for separating the signal amplification power division cavity 31 and the signal on-off control cavity 32. By arranging the first protrusion 33, the signal amplification power division cavity 31 and the signal on-off control cavity 32 are effectively separated, avoiding mutual interference between signals, and improving the purity and transmission efficiency of the signal.

[0034] In some embodiments, as shown in Figure 3 , Figure 4 and Figure 5 , the signal amplification power division cavity 31 includes a first power division area 311 and a second power division area 312, the first power division area 311 is adjacent to the signal receiving end 5, and the size of the first power division area 311 is larger than that of the second power division area 312. In this way, flexible power distribution can be carried out according to the strength and demand of the signal, and the amplification effect of the signal is optimized.

[0035] In some embodiments, as shown in Figure 3 , Figure 4 and Figure 5 , the bottom plate 1 and the intermediate plate 3 are also provided with a second protrusion 34, the second protrusion 34 is transversely arranged, and the second protrusion 34 is connected between the first protrusion 33 and the frame of the bottom plate 1 or the intermediate plate 3, the second protrusion 34 is used to divide the signal on-off control cavity 32 into a first control area 321 and a second control area 322, and the first control area 321 is adjacent to the signal output end 6. The second protrusion 34 divides the signal on-off control cavity 32 into the first control area 321 and the second control area 322, and a radio frequency signal isolation switch is arranged in each of the first control area 321 and the second control area 322. Thus, two-level control of the signal is realized, and it is ensured that the interference or cheating signal can be effectively disconnected and controlled. Thus, fine control of the signal is realized, and the accuracy of signal processing is improved.

[0036] In some embodiments, the sizes of the first control area 321 and the second control area 322 are the same. In this way, the consistency and stability of the signal during transmission can be ensured.

[0037] In some embodiments, as shown in Figure 1 and Figure 2As shown, the rear side of the shielding box is provided with two groups of signal receiving ends 5 and signal output ends 6, and the circuit board 2 is correspondingly provided with two pairs of radio frequency signal isolation switches. One group of signal receiving ends 5, signal output ends 6 and one pair of radio frequency signal isolation switches are located on the left side of the shielding box, and are used for receiving and outputting the first signal. The other group of signal receiving ends 5, signal output ends 6 and one pair of radio frequency signal isolation switches are located on the right side of the shielding box, and are used for receiving and outputting the second signal. The first signal can be a GPS signal (Global Positioning System), and the second signal can be a BDS signal (Beidou Navigation Satellite System). The arrangement of the two groups of signal receiving ends 5, signal output ends 6 and radio frequency signal isolation switches enables the shielding box to process two different signals at the same time, thereby improving the multi-task processing capability of the device.

[0038] In some embodiments, the two groups of signal receiving ends 5, signal output ends 6 and radio frequency signal isolation switches are symmetrically arranged along the longitudinal center line of the shielding box. This makes the structure of the shielding box more balanced, which helps to reduce internal stress or signal interference caused by asymmetry. It can also better suppress electromagnetic interference and noise, and ensure that the shielding box has good isolation.

[0039] In some embodiments, as shown in Figures 3-5 and Figure 8 The bottom plate 1 and the middle plate 3 are provided with a third protrusion 35, which is longitudinally arranged in the middle of the shielding box. The third protrusion 35 is used to separate the left signal amplification power division cavity 31 and the right signal amplification power division cavity 31. The arrangement of the third protrusion 35 separates the left and right signal amplification power division cavities 31, avoids mutual interference between the first signal and the second signal, and ensures the independence and stability of the signals.

[0040] In some embodiments, as shown in Figure 1 The front side of the shielding box is provided with a device connection end 7, which is used to connect a sampling device. The circuit board 2 inside the device connection end 7 is provided with a signal selection circuit (not shown in the figure), which is electrically connected to the left and right radio frequency signal isolation switches. The signal selection circuit is used to select the first signal or the second signal to be input to the sampling device. The signal selection circuit can also be the radio frequency signal isolation switch described above. It can also be a signal detector. The arrangement of the device connection end 7 and the signal selection circuit enables the sampling device to select to receive the first signal or the second signal as needed, thereby improving the compatibility and flexibility of the shielding box.

[0041] In some embodiments, as shown in Figures 3-6As shown, the third protrusion 35 comprises a main protrusion 351, a first branch protrusion 352 and a second branch protrusion 353. The main protrusion 351 is adjacent to the signal receiving end 5 and separates the first power division area 311 and the second power division area 312. The first branch protrusion 352 and the second branch protrusion 353 are branched from the inner end of the main protrusion 351. The first branch protrusion 352 and the second branch protrusion 353 first extend laterally away from the main protrusion 351 and then extend longitudinally to the front side. The first branch protrusion 352 and the second branch protrusion 353 and the frame of the bottom plate 1 or the intermediate plate 3 enclose a signal selection cavity 39, which corresponds to the signal selection circuit. In this way, the working environment of the signal selection circuit is optimized, and the accuracy and stability of signal processing are improved.

[0042] In some embodiments, as shown in Figure 4 and Figure 6 The outer end of the first protrusion 33, the middle part of the second protrusion 34, and the inner end of the first branch protrusion 352 and the second branch protrusion 353 are provided with grooves 36. The grooves 36 can communicate between adjacent cavities to facilitate signal transmission.

[0043] In some embodiments, as shown in Figure 4 and Figure 7 The rear frame of the intermediate plate 3 extends downward to form a first extension edge 37. The lower end surface of the first extension edge 37 is flush with the upper end surface of the bottom plate 1 and the lower end surface of the circuit board 2. The rear frame of the intermediate plate 3 extends upward to form a second extension edge 38. The upper end surface of the second extension edge 38 is flush with the upper end surface of the cover plate 4. The first extension edge 37 and the second extension edge 38 enhance the structural stability of the shielding box, ensure the flatness and tightness of the shielding box when closed, help prevent external electromagnetic interference from entering the interior of the shielding box, and also help prevent internal signals from leaking to the external environment. The overall performance and reliability of the device are improved.

[0044] In some embodiments, the rear side of the shielding box is also provided with a plurality of connecting pieces 8. The height of the connecting pieces 8 is adapted to the height of the shielding box. The connecting pieces 8 connect the shielding box with the signal receiving end 5 or the signal output end 6. The connecting pieces 8 simplify the connection process between the shielding box and the signal receiving end 5 or the signal output end 6, ensure the firmness and stability of the connection, and improve the installation efficiency and convenience of the device.

[0045] It can be seen that the application discloses a shielding box, in the application, at least one group of signal receiving ends and signal output ends are arranged on the rear side of the shielding box, and the ports are electrically connected with the radio frequency signal isolation switch on the circuit board. The radio frequency signal isolation switch can flexibly control the on-off state between the signal receiving end and the signal output end, so as to dynamically adjust the signal path according to the actual demand, effectively avoiding signal interference and energy loss. In order to enhance the signal processing capacity, the bottom plate and the middle plate are respectively provided with signal amplification power division cavities and signal on-off control cavities matched with the radio frequency signal isolation switch. The arrangement of the signal amplification power division cavities and the signal on-off control cavities enhances the performance of signal receiving and outputting, and guarantees the accuracy and isolation of the signal. The signal amplification power division cavities correspond to the signal receiving ends, and the radio frequency signal isolation switch at the signal amplification power division cavities is responsible for receiving and amplifying external signals, so as to meet the demand of complex signal processing. The signal on-off control cavities correspond to the signal output ends, and the radio frequency signal isolation switch corresponding to the signal on-off control cavities controls the output time and path of the signal, thereby significantly improving the electromagnetic compatibility and signal processing capacity of the shielding box, and guaranteeing the accuracy and reliability of the signal in the transmission process.

[0046] The above is only an embodiment of the application, and does not limit the patent range of the application, and any equivalent structural transformation using the content of the specification and drawings, or direct or indirect application in other related technical fields, is also included in the patent protection range of the application.

Claims

1. A shielding box, characterized in that, The shielding box comprises a base plate, a circuit board, a middle plate, and a cover plate arranged sequentially from bottom to top. At least one set of signal receiving and signal output terminals are provided on the side of the shielding box. The signal receiving and signal output terminals are electrically connected to the circuit board. An RF signal isolation switch is provided on the circuit board to control the connection and disconnection between the signal receiving and signal output terminals. Both the base plate and the middle plate are provided with signal amplification and power splitting cavities and signal on / off control cavities adapted to the RF signal isolation switch. The signal amplification and power splitting cavity corresponds to the signal receiving terminal, and the signal on / off control cavity corresponds to the signal output terminal.

2. The shielding box according to claim 1, characterized in that, Both the base plate and the intermediate plate are provided with a first protrusion, which is arranged longitudinally and is located between the signal amplification power divider cavity and the signal on / off control cavity, for separating the signal amplification power divider cavity and the signal on / off control cavity.

3. The shielding box according to claim 2, characterized in that, The signal amplification power divider includes a first power section and a second power section, with the first power section adjacent to the signal receiving end.

4. The shielding box according to claim 2, characterized in that, The base plate and the middle plate are also provided with a second protrusion. The second protrusion is arranged laterally and is connected between the first protrusion and the frame of the base plate or the middle plate. The second protrusion is used to divide the signal on / off control cavity into a first control area and a second control area. The first control area is adjacent to the signal output terminal. A radio frequency signal isolation switch is respectively provided in the first control area and the second control area.

5. The shielding box according to claim 3, characterized in that, The shielding box has two sets of signal receiving terminals and signal output terminals on its rear side. The circuit board has two pairs of radio frequency signal isolation switches. One set of signal receiving terminals, signal output terminals and a pair of radio frequency signal isolation switches is located on the left side of the shielding box for receiving and outputting a first signal. The other set of signal receiving terminals, signal output terminals and a pair of radio frequency signal isolation switches is located on the right side of the shielding box for receiving and outputting a second signal.

6. The shielding box according to claim 5, characterized in that, A third protrusion is provided on the base plate and the middle plate. The third protrusion is longitudinally arranged in the middle of the shielding box. The third protrusion is used to separate the signal amplification and power splitter cavity on the left and the signal amplification and power splitter cavity on the right.

7. The shielding box according to claim 6, characterized in that, The shielding box has a device connection terminal on its front side, which is used to connect to a sampling device. A signal selection circuit is provided on the circuit board inside the device connection terminal. The signal selection circuit is electrically connected to the radio frequency signal isolation switches on the left and right sides respectively. The signal selection circuit is used to select whether to input the first signal or the second signal to the sampling device.

8. The shielding box according to claim 7, characterized in that, The third protrusion includes a main protrusion, a first branch protrusion, and a second branch protrusion. The main protrusion is adjacent to the signal receiving end and is used to separate the first power zone and the second power zone. The first branch protrusion and the second branch protrusion branch out from the inner end of the main protrusion. The first branch protrusion and the second branch protrusion first extend laterally away from the main protrusion and then extend longitudinally forward. The first branch protrusion and the second branch protrusion, together with the frame of the base plate or the middle plate, form a signal selection cavity. The signal selection cavity corresponds to the signal selection circuit.

9. The shielding box according to claim 1, characterized in that, The rear frame of the intermediate plate extends downward to form a first extension edge, the lower end face of which is flush with the upper end face of the base plate and the lower end face of the circuit board; the rear frame of the intermediate plate extends upward to form a second extension edge, the upper end face of which is flush with the upper end face of the cover plate.

10. The shielding box according to claim 1, characterized in that, The rear side of the shielding box is also provided with multiple connectors. The height of the connectors is adapted to the height of the shielding box. The connectors connect the signal receiving end or the signal output end to the shielding box.

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