CN217721583U - Circuit board assembly and electrical device comprising same - Google Patents
Circuit board assembly and electrical device comprising same Download PDFInfo
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- CN217721583U CN217721583U CN202221619300.4U CN202221619300U CN217721583U CN 217721583 U CN217721583 U CN 217721583U CN 202221619300 U CN202221619300 U CN 202221619300U CN 217721583 U CN217721583 U CN 217721583U
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- circuit board
- housing
- board assembly
- electrical device
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Abstract
At least one embodiment of the utility model provides a circuit board assembly and including its electric installation. The circuit board assembly includes: a circuit board including a circuit board body and a plurality of electronic components disposed on the circuit board body; and an electromagnetic shield including a first half shell and a second half shell. The first and second half cases are joined to each other to form a shielded space so that a part of the plurality of electronic components is disposed in the shielded space.
Description
Technical Field
Embodiments of the present disclosure relate to a circuit board assembly having an electromagnetic shielding function and an electrical device including the same.
Background
Some electrical devices are often subject to strong electromagnetic interference. For example, surge protectors may be affected by high frequency lightning strikes. In the case of strong electromagnetic interference, the electrical signals in the electrical device are disturbed, resulting in errors in the measurement and calculation. For example, in the case of a surge protector, in the event of being affected by a high-frequency lightning strike, measurement and operation errors may result, leading to a faulty or failed life prediction function. Therefore, there is a need to improve the electromagnetic shielding performance of electrical devices.
SUMMERY OF THE UTILITY MODEL
At least one embodiment of the present disclosure provides a circuit board assembly including: a circuit board including a circuit board body and a plurality of electronic components disposed on the circuit board body; and an electromagnetic shield including a first half shell and a second half shell. The first and second housing halves are joined to each other to form a shielded space so that a part of the plurality of electronic components is disposed in the shielded space.
For example, in some embodiments, the first and second half shells overlap one another at least a portion of the position at which the first and second half shells are joined to one another.
For example, in some embodiments, at least a portion of the sidewall of the second half shell is inserted inside the first half shell such that the first half shell and the second half shell overlap one another.
For example, in some embodiments, the first and second housing halves are electrically connected to the ground of the circuit board.
For example, in some embodiments, the circuit board further includes a resilient sheet disposed on the circuit board body. At least one of the first half shell and the second half shell abuts against and presses the elastic sheet so that the first half shell and the second half shell are electrically connected to the ground of the circuit board.
For example, in some embodiments, the first and second half shells are joined to each other in a thickness direction of the circuit board body.
For example, in some embodiments, the first and second housing halves are formed with a relief hole, either individually or together, for allowing another portion of the plurality of electronic components or the circuit board body to pass through.
For example, in some embodiments, the first and second half shells are made of an electrically pure iron DT4 material.
For example, in some embodiments, a portion of the electronic components disposed in the shielded space includes electronic components for acquiring data and for processing the data.
For example, in some embodiments, the circuit board assembly is for placement in a surge protector.
At least one embodiment of the present disclosure provides an electrical device, including: a housing comprising a first sub-housing and a second sub-housing; and a circuit board assembly as described above disposed in the housing.
For example, in some embodiments, the first and second half shells are sandwiched between the first and second sub-housings, thereby securing the first and second half shells.
For example, in some embodiments, the electrical device is a surge protector.
Drawings
To more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present disclosure and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings may be obtained from the drawings without inventive effort.
Fig. 1 shows a perspective view of an electrical device according to an embodiment of the present disclosure;
fig. 2 shows another perspective view of the electrical device shown in fig. 1, wherein the first sub-housing is not shown;
FIG. 3 shows an exploded perspective view of the electrical device shown in FIG. 1;
FIG. 4 shows a perspective cross-sectional view of the electrical device shown in FIG. 1;
FIG. 5 illustrates a perspective view of a circuit board of the electrical device shown in FIG. 1;
FIG. 6 illustrates a perspective view of an electromagnetic shield of the electrical device shown in FIG. 1;
fig. 7 shows a perspective view of a first housing half of an electromagnetic shield of the electrical device shown in fig. 1;
fig. 8 illustrates a perspective view of a second half-shell of the electromagnetic shield of the electrical device shown in fig. 1; and is
Fig. 9-11 respectively illustrate perspective views of electromagnetic shields according to further embodiments of the present disclosure.
Detailed Description
Next, a core circuit board assembly and an electrical device according to an embodiment of the present disclosure are described in detail with reference to the accompanying drawings. To make the objects, technical solutions and advantages of the present disclosure more clear, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the embodiments of the present disclosure, and it is obvious that the described embodiments are some, but not all embodiments of the present disclosure.
Thus, the following detailed description of the embodiments of the present disclosure, presented in conjunction with the figures, is not intended to limit the scope of the claimed disclosure, but is merely representative of selected embodiments of the disclosure. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.
The singular forms include the plural unless the context otherwise dictates otherwise. Throughout the specification, the terms "comprises," "comprising," "has," "having," "includes," "including," "having," "including," and the like are used herein to specify the presence of stated features, integers, steps, operations, elements, components, or groups thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or groups thereof.
In addition, even though ordinal terms such as "first," "second," etc., are used to describe various elements, the elements are not limited by the terms, and the terms are used only to distinguish one element from another.
Fig. 1 shows a perspective view of an electrical device according to an embodiment of the present disclosure, and fig. 2 shows another perspective view of the electrical device shown in fig. 1, wherein the first sub-housing 111 is not shown in order to more clearly show the interior of the electrical device; FIG. 3 shows an exploded perspective view of the electrical device shown in FIG. 1; fig. 4 shows a perspective cross-sectional view of the electrical device shown in fig. 1. The electrical device is a surge protector, but the disclosure is not so limited and may also be other electrical devices that require electromagnetic protection, such as circuit breakers, earth leakage protectors, smart electrical accessories, or other low voltage electrical devices.
As shown in fig. 1-4, an electrical device includes a housing and a circuit board assembly housed in the housing. Furthermore, the electrical device may also comprise other components (not shown). The circuit board assembly includes a circuit board and an electromagnetic shield 120. The circuit board includes a circuit board body 131 and a plurality of electronic components 132 disposed on the circuit board body 131. The electromagnetic shield case 120 is composed of a first half case 121 and a second half case 122, and the first half case 121 and the second half case 122 are joined to each other to form a shield space such that a part of the plurality of electronic components 132 is disposed in the shield space. Since a part of the electronic component 132 is disposed in the shield space, the electromagnetic shielding performance of the electric device is improved. In some cases, disposing only a portion of electronic components 132 within the shielding space of electromagnetic shield 120 may achieve better electromagnetic shielding than disposing all of electronic components 132 within the shielding space of electromagnetic shield 120. By appropriately selecting the part of the electronic components 132, an optimum electromagnetic shielding effect can be achieved. For example, the portion of the electronic components 132 may include electronic components 132 for acquiring data and for processing data, such as a data acquisition chip and a data processing chip. These electronic components are sensitive to electromagnetic interference, and placing them in a shielded space and placing some other electronic components outside the shielded space is advantageous to minimize or avoid errors in measurement and calculation due to electromagnetic interference. For example, the first half-case 121 and the second half-case 122 include an electromagnetic interference preventing material. Specifically, for example, first half-shell 121 and second half-shell 122 are made of an electrically pure iron DT4 material as known in the art.
As shown in fig. 4, the first and second case halves 121 and 122 are joined to each other in the thickness direction of the circuit board body 131. Further, the first and second half cases 121 and 122 overlap each other at the joining position of the first and second half cases 121 and 122.
FIG. 5 illustrates a perspective view of a circuit board of the electrical device shown in FIG. 1; fig. 6 shows a perspective view of the electromagnetic shield 120 of the electrical device shown in fig. 1; fig. 7 shows a perspective view of the first housing half 121 of the electromagnetic shield 120 of the electrical device shown in fig. 1; fig. 8 illustrates a perspective view of second housing half 122 of electromagnetic shield 120 of the electrical device shown in fig. 1.
As shown in fig. 8, the second half casing 122 has a partial upper sidewall 1222 in the middle of the upper portion thereof, and both side and lower portions of the second half casing 122 have a left sidewall 1223, a right sidewall 1234 and a lower sidewall 1221, respectively. As shown in fig. 5, a circuit board notch 134 is disposed in the circuit board body 131. The partial upper sidewall 1222, the left sidewall 1223, the right sidewall 1234, and the lower sidewall 1221 are inserted into the first case half 121 through the circuit board cutout 134 provided in the circuit board body 131 to overlap with the first case half 121. The overlap of first housing half 121 and second housing half 122 helps to further improve the electromagnetic shielding performance of the circuit board assembly and the electrical device.
As shown in fig. 5, the circuit board body 131 is provided with an elastic piece 133, which is connected to the ground of the circuit board. As shown in fig. 7, a housing notch 1211 is formed on a sidewall of the first housing half 121. The first half case 121 abuts against and presses the elastic piece 133 at the case notch 1211 thereof, so that the first half case 121 and the second half case 122 electrically connected to the first half case 121 are electrically connected to the ground of the circuit board. By grounding the first half-shell 121 and the second half-shell 122 of the electromagnetic shield 120, the electromagnetic shielding performance of the circuit board assembly and the electrical device is further improved.
As shown in fig. 6, the first half case 121 and the second half case 122 are formed together with a relief hole 123 for allowing another part 132 of the plurality of electronic components 132 or the circuit board body 131 to pass through. In this example, the relief holes 123 are formed on both sides of the partial upper sidewall 1222. The position, number and size of the abdicating holes 123 can be adjusted as required. The location, number and size of the relief holes 123 will also affect the electromagnetic shielding performance of the circuit board assembly and the electrical device.
As shown in fig. 1 to 4, the housing of the electrical device includes a first sub-housing 111 and a second sub-housing 112. The first and second half cases 121 and 122 are fixed by being interposed between the first and second sub-housings 111 and 112. That is, the first sub-housing 111 presses the first half-housing 121 against the second half-housing 122, and the second sub-housing 112 presses the second half-housing 122 against the first half-housing 121, thereby fixing the first half-housing 121 and the second half-housing 122 to each other. The first sub-housing 111 and the second sub-housing 112 may be provided with positioning members 1121 for positioning the first half case 121 and the second half case 122, respectively. Fixing the first and second half cases 121 and 122 by the first and second sub-housings 111 and 112 helps to reduce the volume of the electric device and simplify the structure of the electric device.
The manner of fixing the first half case 121 and the second half case 122 is not limited to this. For example, additional fasteners may be used to secure first half shell 121 and second half shell 122.
In addition, it should be noted that the present disclosure is not limited to grounding the electromagnetic shield 120 through the elastic sheet 133, and other methods, such as a wire, may be adopted.
Further, it should be noted that the present disclosure is not limited to the first half case 121 and the second half case 122 being joined to each other in the thickness direction of the circuit board body 131. For example, the first half case 121 and the second half case 122 may also be joined to each other in other directions perpendicular to the thickness direction. Also, the first and second half- shells 121, 122 are not limited to overlapping each other, nor may the first and second half- shells 121, 122 overlap each other (although slight overlapping due to the need for engagement and alignment is not precluded).
Fig. 9-11 respectively illustrate perspective views of electromagnetic shields according to further embodiments of the present disclosure.
As shown in fig. 9, the electromagnetic shield 220 includes a first half case 221 and a second half case 222, and the first half case 221 and the second half case 222 are joined to each other in a direction perpendicular to the thickness direction (the up-down direction in fig. 1 to 4). The first and second half cases 221 and 222 overlap each other at the joining position, and a relief hole 223 is formed in the first half case 221.
As shown in fig. 10, the electromagnetic shield 320 includes a first half case 321 and a second half case 322, and the first half case 321 and the second half case 322 are joined to each other in a direction perpendicular to the thickness direction (up-down direction in fig. 1 to 4). The first half case 321 and the second half case 322 overlap each other at the joining position, and together form the escape hole 323. Unlike the embodiment shown in fig. 8, the escape hole 323 of the electromagnetic shield case shown in fig. 9 is positioned at the center of the first case half 321.
As shown in fig. 11, the electromagnetic shield 420 includes a first half case 421 and a second half case 422, and the first half case 421 and the second half case 422 are joined to each other in a direction perpendicular to the thickness direction. Unlike the embodiment shown in fig. 6, the first half-shell 421 and the second half-shell 422 of the electromagnetic shield shown in fig. 11 do not overlap each other.
By simulating the electromagnetic shielding cases of fig. 6 and 9-11, the electromagnetic intensity in the electromagnetic shielding case 420 shown in fig. 11 is lower than that in the electromagnetic shielding case 120 shown in fig. 6, and the electromagnetic shielding cases 220 and 320 shown in fig. 9 and 10 are lower than that in the electromagnetic shielding case 120 shown in fig. 6 under the same electromagnetic interference. That is, the first half case 121, 221, 321, 421 and the second half case 122, 222, 322, 422 are joined in the thickness direction and overlap each other, which contributes to the improved electromagnetic shielding performance of the electromagnetic shield.
The scope of the present disclosure is not defined by the embodiments described above but is defined by the appended claims and equivalents thereof.
Claims (14)
1. A circuit board assembly, comprising:
a circuit board including a circuit board body and a plurality of electronic components disposed on the circuit board body; and
an electromagnetic shield comprising a first half shell and a second half shell, wherein,
the first and second half cases are joined to each other to form a shielded space so that a part of the plurality of electronic components is disposed in the shielded space.
2. The circuit board assembly of claim 1,
the first half case and the second half case overlap each other at least a part of a position where the first half case and the second half case are joined to each other.
3. The circuit board assembly of claim 2,
at least a portion of the sidewall of the second housing half is inserted inside the first housing half such that the first housing half and the second housing half overlap each other.
4. Circuit board assembly according to any one of claims 1-3,
the first and second housing halves are electrically connected to a ground of the circuit board.
5. The circuit board assembly of claim 4,
the circuit board also comprises an elastic sheet which is arranged on the circuit board body,
at least one of the first half shell and the second half shell abuts and presses the elastic sheet so that the first half shell and the second half shell are electrically connected to the ground of the circuit board.
6. A circuit board assembly according to any of claims 1-3,
the first half case and the second half case are joined to each other in a thickness direction of the circuit board body.
7. A circuit board assembly according to any of claims 1-3,
the first half shell and the second half shell are separately or together formed with a relief hole for allowing another part of the plurality of electronic components or the circuit board body to pass through.
8. Circuit board assembly according to any one of claims 1-3,
the first and second half shells are made of an electrically pure iron DT4 material.
9. Circuit board assembly according to any one of claims 1-3,
the portion of the electronic components disposed in the shielded space includes electronic components for acquiring data and for processing data.
10. Circuit board assembly according to any one of claims 1-3,
the circuit board assembly is for placement in a surge protector.
11. An electrical device, comprising:
a housing comprising a first sub-housing and a second sub-housing; and
a circuit board assembly according to any of claims 1-10, disposed in the housing.
12. The electrical device of claim 11,
the electrical device is a surge protector.
13. An electrical device, comprising:
a housing comprising a first sub-housing and a second sub-housing; and
the circuit board assembly of claim 6, disposed in the housing such that the first and second half shells are sandwiched between the first and second sub-housings, thereby securing the first and second half shells.
14. The electrical device of claim 13,
the electrical device is a surge protector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221619300.4U CN217721583U (en) | 2022-06-27 | 2022-06-27 | Circuit board assembly and electrical device comprising same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221619300.4U CN217721583U (en) | 2022-06-27 | 2022-06-27 | Circuit board assembly and electrical device comprising same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217721583U true CN217721583U (en) | 2022-11-01 |
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ID=83774961
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221619300.4U Active CN217721583U (en) | 2022-06-27 | 2022-06-27 | Circuit board assembly and electrical device comprising same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217721583U (en) |
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2022
- 2022-06-27 CN CN202221619300.4U patent/CN217721583U/en active Active
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