CN216532458U

CN216532458U - Electromagnetic shielding box

Info

Publication number: CN216532458U
Application number: CN202123160450.1U
Authority: CN
Inventors: 刘思鹏; 祝汉歧; 苏学彬; 王倩
Original assignee: Beijing Keen Dazhi Robot Technology Co ltd
Current assignee: Beijing Keen Dazhi Robot Technology Co ltd
Priority date: 2021-12-15
Filing date: 2021-12-15
Publication date: 2022-05-13
Anticipated expiration: 2031-12-15

Abstract

The present disclosure provides an electromagnetic shielding box, the electromagnetic shielding box is used for to set up in electromagnetic shielding box inside first circuit board carries out the electromagnetic shield, and it includes: a case part forming an accommodating space and having an opening formed at an upper end thereof; and an upper cover portion that is provided to the box portion, and at least one of the upper cover portion and the box portion is formed with a hole for passing a cable therethrough; wherein one of the box body part and the upper cover part forms a fixed part, the other of the box body part and the upper cover part forms a fixed part, the fixed part and the fixed part are matched, and the box body part and the upper cover part are fixed through bending of the fixed part.

Description

Electromagnetic shielding box

Technical Field

The present disclosure relates to an electromagnetic shielding box, and more particularly, to an electromagnetic shielding box for a circuit board.

Background

The structure of the existing small electromagnetic shielding device is to mount a circuit board to be shielded into the shielding device and then directly weld the shielding device on a main circuit board. The connection mode of the shielding device requires that a pad is designed at the mounting position of the prefabricated main circuit board to facilitate welding, and the circuit board with a plurality of plug connector cables is difficult to be integrally shielded, so that the shielding effect is poor.

Meanwhile, the existing shielding device for integrally shielding one or more circuit boards is a whole shielding device which fixes the circuit boards through screws, and the opening and closing of the shielding device are controlled through hinges and screw structures. When a cable with a cable plug passes through the electromagnetic shielding structure, a crossover sub is required to be installed on the wall of the electromagnetic shielding box or a hole with a larger size is reserved to pass through the cable plug, the electromagnetic shielding box with the crossover sub occupies equipment space, and the cost is higher; the electromagnetic shielding box with the larger opening has poorer electromagnetic shielding performance.

SUMMERY OF THE UTILITY MODEL

In order to solve one of the above technical problems, the present disclosure provides an electromagnetic shielding box.

According to an aspect of the present disclosure, there is provided an electromagnetic shielding box for electromagnetically shielding a first circuit board disposed inside the electromagnetic shielding box, including:

a case portion forming an accommodating space and having an opening formed at an upper end thereof; and

an upper cover portion that is provided to the box portion, and at least one of the upper cover portion and the box portion is formed with a hole for passing a cable therethrough;

wherein one of the box body part and the upper cover part forms a fixed part, the other of the box body part and the upper cover part forms a fixed part, the fixed part and the fixed part are matched, and the box body part and the upper cover part are fixed through bending of the fixed part.

According to the electromagnetic shielding box of at least one embodiment of the present disclosure, at least one wire passing hole is formed in a side wall of the box body portion, and a cable is connected to the first circuit board through the wire passing hole of the box body portion.

According to an electromagnetic shielding case of at least one embodiment of the present disclosure, the upper cover part is formed with at least one through hole for a cable connected to the first circuit board to pass through.

An electromagnetic shielding case according to at least one embodiment of the present disclosure further includes:

the first sealing cover and the second sealing cover are matched with each other and used for sealing the opening of the box body part, mounting holes are formed in the matched first sealing cover and the matched second sealing cover, the mounting holes correspond to the through holes of the upper cover part in position, and cables can penetrate through the mounting holes and the through holes.

According to an electromagnetic shielding case of at least one embodiment of the present disclosure, the positions of the first cover and the second cover are restricted by the upper cover part.

According to the electromagnetic shielding box of at least one embodiment of the present disclosure, the first cover and the second cover are formed with a notch at their ends, and when the first cover and the second cover are mated, the notch of the first cover and the notch of the second cover jointly form the mounting hole.

According to an electromagnetic shield box of at least one embodiment of the present disclosure, at least a part of the positions of the side walls of the first cover and the second cover with respect to the longitudinal direction of the box portion is provided with a burring portion, and when the first cover and the second cover are disposed in the box portion, a lower edge of the burring portion is located below an upper end of the box portion.

According to the electromagnetic shielding box of at least one embodiment of the present disclosure, a protective coil is disposed in the mounting hole, and the protective coil is used for a coil of the first circuit board to pass through.

According to the electromagnetic shielding box of at least one embodiment of the present disclosure, a periphery of the upper cover portion is provided with a bending structure, and when the upper cover portion is disposed on the box portion, a lower edge of the bending structure is located below an upper end of the box portion, so that positions of the first cover and the second cover are limited by the bending structure.

According to the electromagnetic shield box of at least one embodiment of this disclosure, the fixed part includes the bellying that the upper end of box body portion formed, include by the fixed part the shrinkage pool that the upper cover portion formed, the bellying is followed after passing in the shrinkage pool, buckles the bellying, so that fix upper cover portion and box body portion.

Drawings

The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the disclosure and together with the description serve to explain the principles of the disclosure.

Fig. 1 is a schematic structural view of an electromagnetic shielding box according to an embodiment of the present disclosure.

Fig. 2 is an exploded structural schematic view of an electromagnetic shielding box according to one embodiment of the present disclosure.

Fig. 3 is a schematic view of a use state of an electromagnetic shielding box according to an embodiment of the present disclosure.

Fig. 4 is an exploded schematic view of a use state of an electromagnetic shielding box according to one embodiment of the present disclosure.

The reference numbers in the figures are in particular:

10 first circuit board

20 second circuit board

30 stud

100 electromagnetic shielding box

110 box body part

111 wire through hole

112 fixed part

120 upper cover part

121 fixed part

122 bending structure

130 first cover

140 second cover

150 protective coil

160 turnup part

170 gap.

Detailed Description

The present disclosure will be described in further detail with reference to the drawings and embodiments. It is to be understood that the specific embodiments described herein are for purposes of illustration only and are not to be construed as limitations of the present disclosure. It should be further noted that, for the convenience of description, only the portions relevant to the present disclosure are shown in the drawings.

It should be noted that the embodiments and features of the embodiments in the present disclosure may be combined with each other without conflict. Technical solutions of the present disclosure will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

Unless otherwise indicated, the illustrated exemplary embodiments/examples are to be understood as providing exemplary features of various details of some ways in which the technical concepts of the present disclosure may be practiced. Accordingly, unless otherwise indicated, features of the various embodiments may be additionally combined, separated, interchanged, and/or rearranged without departing from the technical concept of the present disclosure.

The use of cross-hatching and/or shading in the drawings is generally used to clarify the boundaries between adjacent components. As such, unless otherwise noted, the presence or absence of cross-hatching or shading does not convey or indicate any preference or requirement for a particular material, material property, size, proportion, commonality between the illustrated components and/or any other characteristic, attribute, property, etc., of a component. Further, in the drawings, the size and relative sizes of components may be exaggerated for clarity and/or descriptive purposes. While example embodiments may be practiced differently, the specific process sequence may be performed in a different order than that described. For example, two consecutively described processes may be performed substantially simultaneously or in an order reverse to the order described. In addition, like reference numerals denote like parts.

When an element is referred to as being "on" or "on," "connected to" or "coupled to" another element, it can be directly on, connected or coupled to the other element or intervening elements may be present. However, when an element is referred to as being "directly on," "directly connected to" or "directly coupled to" another element, there are no intervening elements present. For purposes of this disclosure, the term "connected" may refer to physically, electrically, etc., and may or may not have intermediate components.

For descriptive purposes, the present disclosure may use spatially relative terms such as "below … …," below … …, "" below … …, "" below, "" above … …, "" above, "" … …, "" higher, "and" side (e.g., as in "sidewall") to describe one component's relationship to another (other) component as illustrated in the figures. Spatially relative terms are intended to encompass different orientations of the device in use, operation, and/or manufacture in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "below … …" can encompass both an orientation of "above" and "below". Further, the devices may be otherwise positioned (e.g., rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

The terminology used herein is for the purpose of describing particular embodiments and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. Furthermore, when the terms "comprises" and/or "comprising" and variations thereof are used in this specification, the presence of stated features, integers, steps, operations, elements, components and/or groups thereof are stated but does not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components and/or groups thereof. It is also noted that, as used herein, the terms "substantially," "about," and other similar terms are used as approximate terms and not as degree terms, and as such, are used to interpret inherent deviations in measured values, calculated values, and/or provided values that would be recognized by one of ordinary skill in the art.

Fig. 1 is a schematic structural view of an electromagnetic shielding box according to one embodiment of the present disclosure. Fig. 2 is an exploded structural schematic view of an electromagnetic shielding box according to one embodiment of the present disclosure. Fig. 3 is a schematic view of a use state of an electromagnetic shielding box according to an embodiment of the present disclosure. Fig. 4 is an exploded schematic view of a use state of an electromagnetic shielding box according to one embodiment of the present disclosure.

As shown in fig. 1 to 4, the present disclosure provides an electromagnetic shielding box 100, where the electromagnetic shielding box 100 is used to electromagnetically shield a first circuit board 10 disposed inside the electromagnetic shielding box 100, and at this time, the electromagnetic shielding box 100 may be mounted on a second circuit board 20, and of course, the electromagnetic shielding box 100 may also be mounted on other components, for example, a component fixing the second circuit board 20, as long as the electromagnetic shielding box is provided between the first circuit board 10 and the second circuit board 20 (or other components).

In the present disclosure, as shown in fig. 4, a stud 30 may be disposed on the second circuit board 20, and the box portion 110 is fixed to the stud 30, at this time, the stud 30 has a preset height, so that a preset distance is provided between the box portion 110 and the second circuit board 20, thereby preventing the box portion 110 from affecting the normal operation of the second circuit board 20; preferably, the stud 30 is a hex stud.

Accordingly, a hole is formed in the bottom wall of the box portion 110 at a position opposite to the stud 30, a screw hole is formed in the upper end of the stud 30, and a screw is inserted through the hole in the bottom wall of the box portion 110 and screwed into the screw hole of the stud 30, thereby fixing the box portion 110 to the second circuit board 20.

In the present disclosure, the electromagnetic shielding case 100 includes a case portion 110 and an upper cover portion 120.

The case portion 110 forms an accommodating space, and an opening through which the first circuit board 10 may be placed inside the case portion 110 or taken out from the inside of the case portion 110 is formed at an upper end of the case portion 110.

In terms of structure, the case portion 110 is formed in a hexahedral shape, but the shape of the case portion 110 is not limited thereto, and can be changed according to the shape of the first circuit board 10.

Preferably, at least one wire passing hole 111 is formed in a sidewall of the box body 110, and a cable is connected to the first circuit board 10 through the wire passing hole 111 of the box body 110; alternatively, the side wall of the box portion 110 may not be formed with the wire passing hole 111; more preferably, a protection structure of the cable may be provided in the wire passing hole 111.

When the first circuit board 10 is disposed in the electromagnetic shield case, the first circuit board 10 is supported on the bottom wall of the case portion 110 by an insulating material; alternatively, an insulating layer may be disposed on the bottom wall of the box portion 110 to prevent the box portion 110 from affecting the normal operation of the first circuit board 10; more preferably, the first circuit board 10 may be fixed to the stud 30 by screws.

The upper cover portion 120 is provided to the box portion 110, and at least one of the upper cover portion 120 and the box portion 110 is formed with a hole for passing a cable therethrough.

In the present disclosure, at least one through hole is formed on the upper cover part 120, as a specific example, the number of the through holes is 3, two of the through holes may be used for a cable to pass through, and the other through hole may play a certain weight reduction role; wherein the size of the through hole is required to be enough for the cable connector to pass through, for example, the size of the through hole is larger than that of the mounting hole.

In the present disclosure, one of the box portion 110 and the upper cover portion 120 forms a fixing portion 112, the other of the box portion 110 and the upper cover portion 120 forms a fixed portion 121, and the fixing portion 112 and the fixed portion 121 are engaged with each other to fix the box portion 110 and the upper cover portion 120 by bending the fixing portion 112.

Specifically, the fixing portion 112 includes a protruding portion formed at an upper end of the case portion 110, and the protruding portion may be formed as a sheet-like member so that the protruding portion is easily bent; the fixed part 121 includes a recess formed in the upper cover part 120, and the protrusion is bent after passing through the recess, so as to fix the upper cover part 120 and the box part 110.

In the present disclosure, as shown in fig. 2, the electromagnetic shielding box 100 may further include: and a first cover 130 and a second cover 140, the first cover 130 and the second cover 140 cooperating with each other to close the opening of the case portion 110, wherein the first cover 130 and the second cover 140 after cooperating are formed with mounting holes corresponding to the through holes of the upper cover portion 120 in position and allowing cables to pass through the mounting holes and the through holes.

Thereby, the positions of the first cover 130 and the second cover 140 may be restricted by the upper cover part 120.

In the present disclosure, as shown in fig. 2, the mating ends of the first cover 130 and the second cover 140 are formed with notches 170, and when the first cover 130 and the second cover 140 are mated, the notches 170 of the first cover 130 and the notches 170 of the second cover 140 form the mounting hole together.

The lengths of the first cover 130 and the second cover 140 may be the same or different, and when the distances between the first cover 130 and the second cover 140 are different, the mounting hole is formed at a position far from the middle of the electromagnetic shielding box.

The shape and size of the mounting hole are the same as those of the cable passing through the mounting hole, or the size of the mounting hole is slightly larger than that of the cable. Be provided with protective coil 150 in the mounting hole, protective coil 150 is used for connecting the coil of first circuit board 10 and passes to through protective coil seals the cable with the gap between the mounting hole, to passing when reinforcing shielding effect produce the guard action to the cable that passes the mounting hole. From this, through adopting the mounting hole design the same with cable shape and size, in addition add the design of protecting the coil, effectively increased shielding and shielding effect.

The first cover 130 and the second cover 140 are provided with a flange 160 at least in part of the position of the side wall in the longitudinal direction of the box portion 110, and when the first cover 130 and the second cover 140 are provided in the box portion 110, the lower edge of the flange 160 is located below the upper end of the box portion 110.

Preferably, the first cover 130 is integrally formed with the flange portion 160 of the first cover 130, and correspondingly, the second cover 140 is integrally formed with the flange portion 160 of the second cover 140.

The upper cover part 120 is provided at a periphery thereof with a bending structure 122, and when the upper cover part 120 is disposed on the box part 110, a lower edge of the bending structure 122 is located below an upper end of the box part 110, so that the positions of the first cover 130 and the second cover 140 are limited by the bending structure 122.

That is, at this time, the first cover 130 and the second cover 140 are positioned between the case portion 110 and the upper cover portion 120, so that the bent structure 122 restricts the positions of the first cover 130 and the second cover 140.

Preferably, the notch may be formed at a top end of the bending structure 122 to allow the protrusion to pass through and bend the protrusion downwards, so as to fix the upper cover part 120 and the box part 110.

On the other hand, it will be understood by those skilled in the art that the protrusion may be formed on the upper cover part 120, and a corresponding hole (fixed part) may be formed at a side wall position of the case part 110.

When the electromagnetic shielding box of the present disclosure is used, the fixed portion 112 is tilted by using pliers or a screwdriver to restore to a flat state, at this time, the upper cover portion may be removed, and then the first cover 130 and the second cover 140 may be removed to take out the first circuit board; the reverse procedure, i.e. the mounting of the first circuit board can be achieved.

In the present disclosure, the box body 110, the upper cover 120, the first cover 130, the second cover 140, and other components may be made by bending a metal plate, so as to simplify the processing technology; accordingly, the case portion 110, the upper cover portion 120, the first cover 130, and the second cover 140 are made of a metal material or the like, such as iron or aluminum alloy, which can perform an electromagnetic shielding function, so that the electromagnetic shielding case of the present disclosure is convenient to install, low in manufacturing cost, and good in electromagnetic shielding effect.

Therefore, the electromagnetic shielding box can be used for integrally shielding a certain circuit board in the control box, a large cable joint on the circuit board does not need special treatment, the cable can directly pass through the electromagnetic shielding box, and the wire passing hole can be designed to just pass through the cable. And the equipment arrangement space can be saved, welding is not needed, the circuit board is not needed to be specially processed, the installation is convenient, and the manufacturing cost is reduced.

The electromagnetic shielding box has the advantages of saving equipment arrangement space, no need of special mounting tools, no need of welding, no falling off during equipment transportation and vibration, simple structure, convenience in mounting, low manufacturing cost and the like. The electromagnetic shielding structure is particularly suitable for the integral electromagnetic shielding of the circuit board in a multi-layer circuit board structure.

In the description herein, reference to the description of the terms "one embodiment/mode," "some embodiments/modes," "example," "specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment/mode or example is included in at least one embodiment/mode or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to be the same embodiment/mode or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments/modes or examples. Furthermore, the various embodiments/aspects or examples and features of the various embodiments/aspects or examples described in this specification can be combined and combined by one skilled in the art without conflicting therewith.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

It will be understood by those skilled in the art that the foregoing embodiments are merely for clarity of illustration of the disclosure and are not intended to limit the scope of the disclosure. Other variations or modifications may occur to those skilled in the art, based on the foregoing disclosure, and are still within the scope of the present disclosure.

Claims

1. An electromagnetic shielding box for electromagnetically shielding a first circuit board disposed inside the electromagnetic shielding box, comprising:

wherein, one of the box body part and the upper cover part forms a fixing part, the other of the box body part and the upper cover part forms a fixed part, the fixing part is matched with the fixed part, and the box body part and the upper cover part are fixed by the bending of the fixing part.

2. The electromagnetic shielding cage according to claim 1, wherein the side wall of the cage portion is formed with at least one wire passing hole through which a cable passes to be connected to the first circuit board.

3. The electromagnetic shielding box according to claim 1, wherein the upper cover part is formed with at least one through-hole for a cable connected to the first circuit board to pass through.

4. The electromagnetic shielding cage of claim 3, further comprising:

5. The electromagnetic shielding box according to claim 4, wherein the positions of the first cover and the second cover are restricted by the upper cover part.

6. The electromagnetic shielding box of claim 4 wherein the mating ends of the first cover and the second cover each define a notch, and wherein the notches of the first cover and the second cover cooperate to define the mounting hole when the first cover and the second cover are mated.

7. The electromagnetic shielding box according to claim 6, wherein at least a part of the positions of the side walls of the first cover and the second cover with respect to the longitudinal direction of the box portion is provided with a burring portion, and when the first cover and the second cover are disposed in the box portion, a lower edge of the burring portion is positioned below an upper end of the box portion.

8. The electromagnetic shielding case of claim 6, wherein a protective coil is disposed in the mounting hole, and the protective coil is used for connecting the coil of the first circuit board to pass through.

9. The electromagnetic shielding box according to claim 4, wherein the upper lid portion is provided at a periphery thereof with a bent structure, and when the upper lid portion is disposed at the box portion, a lower edge of the bent structure is located below an upper end of the box portion so as to restrict the positions of the first and second covers by the bent structure.

10. The electromagnetic shielding case according to claim 1, wherein the fixing portion includes a projection formed at an upper end of the case portion, and the fixed portion includes a recess formed at the upper lid portion, and the projection is bent after passing through the recess to fix the upper lid portion and the case portion.