CN219248161U - Electrical isolation assembly, circuit board and electrical device - Google Patents
Electrical isolation assembly, circuit board and electrical device Download PDFInfo
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- CN219248161U CN219248161U CN202223054637.8U CN202223054637U CN219248161U CN 219248161 U CN219248161 U CN 219248161U CN 202223054637 U CN202223054637 U CN 202223054637U CN 219248161 U CN219248161 U CN 219248161U
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- circuit board
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- isolation assembly
- electrical isolation
- slot
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Abstract
The utility model relates to an electrical isolation assembly for isolating at least two adjacent conductors arranged on a circuit board, characterized in that the electrical isolation assembly comprises: a slot disposed between the at least two adjacent conductors; and an isolation structure having an engagement end and a free end opposite the engagement end, the engagement end being received in the slot, the free end extending away from the at least two adjacent conductors in a direction perpendicular to the circuit board. The utility model also relates to a circuit board comprising the electrical isolation assembly, and to an electrical device comprising the circuit board. The electrical isolation assembly/circuit board according to the present utility model can increase the creepage distance while increasing the electrical clearance without increasing the volume of the circuit board, and can reduce the manufacturing cost.
Description
Technical Field
The utility model relates to the technical field of electric isolation, in particular to an electric isolation assembly, a circuit board comprising the electric isolation assembly and electric equipment comprising the circuit board.
Background
A printed circuit board (Printed Circuit Board, PCB) is a carrier that electrically connects electrical components to each other, and a printed circuit on the PCB board is connected to an external circuit or electrical component via PCB terminals.
On a PCB, a certain safety distance needs to be satisfied between electrical components, particularly between high-voltage electrical components or wires with a voltage of 36V or more, and if the safety distance is insufficient, the electrical components or wires may be broken down, thereby causing an open circuit or a short circuit in a circuit.
On the existing PCB board, the electrical gap and creepage distance are generally increased by increasing the spacing between the electrical components or wires, so as to meet the isolation requirement of high voltage. However, as the space between the electrical components or wires increases, the volume of the PCB board becomes large, and the manufacturing cost increases.
Disclosure of Invention
In order to solve the above-mentioned problems in the prior art, the present utility model proposes an electrical isolation assembly that is slotted at a position where a high voltage pitch is required in a PCB, and two or more signals at the position are isolated by an insulating material, such as a high dielectric strength material, combined with a housing and penetrating the slotted position, thereby achieving the purpose of increasing an electrical gap and a creepage distance.
In particular, according to a first aspect of the present utility model, there is provided an electrical isolation assembly for isolating at least two adjacent conductors connected to a circuit board, characterized in that the electrical isolation assembly comprises:
a slot disposed between the at least two adjacent conductors; and
an isolation structure having an engagement end and a free end opposite the engagement end, the engagement end being received in the slot, the free end extending away from the at least two adjacent conductors in a direction perpendicular to the circuit board.
According to an advantageous embodiment, the slot is arranged through the circuit board and the electrical isolation assembly further comprises a support plate arranged below the circuit board, the engagement end of the isolation structure extending through the slot and being fixed to the support plate.
According to an advantageous embodiment, the isolation structure is a baffle extending through the slot, the baffle defining a continuous insulating surface extending between the engagement end and the free end.
According to an advantageous embodiment, the spacer structure is formed in one piece with the support plate; alternatively, the isolation structure is formed as a separate structure from the support plate.
According to an advantageous embodiment, the isolation structure is made of an insulating material; and/or the support plate is made of an insulating material or metal.
According to an advantageous embodiment, the at least two adjacent conductors comprise electrical element pins or wires.
According to a second aspect of the present utility model there is also provided a circuit board comprising an electrically isolated assembly as described above.
According to an advantageous embodiment, the circuit board is a PCB board.
According to a third aspect of the present utility model, there is also provided an electrical apparatus comprising:
a housing made of an insulating material or metal; and
as a circuit board, the circuit board is disposed in the housing.
According to an advantageous embodiment, a support plate for supporting the insulation structure is formed as a part of the housing.
The electrical isolation assembly/circuit board according to the present utility model can increase the creepage distance while increasing the electrical clearance without increasing the volume of the circuit board, and can reduce the manufacturing cost.
Drawings
Other features and advantages of the apparatus of the present utility model will be apparent from, or may be learned by the practice of the utility model as set forth hereinafter, the figures being incorporated in and as set forth hereinafter with the drawings. Wherein:
fig. 1 shows a schematic diagram of an electrical gap and creepage distance between two electrical element pins on a conventional PCB board.
Fig. 2 shows a schematic diagram of a circuit board comprising an electrical isolation assembly according to an exemplary embodiment of the utility model.
Detailed Description
An electrical isolation assembly and a circuit board according to the present utility model will be described below by way of example with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model to those skilled in the art. It will be apparent, however, to one skilled in the art that the present utility model may be practiced without some of these specific details. Rather, the utility model can be considered to be implemented with any combination of the following features and elements, whether or not they relate to different embodiments. Thus, the various aspects, features, embodiments and advantages below are for illustration only and should not be considered as elements or limitations of the claims unless explicitly set forth in the claims.
Applicant's research has found that the safety distance between electrical components on a PCB board is mainly related to both the requirements of the electrical clearance and creepage distance. It will be appreciated that creepage distance is the shortest path between two conductive elements or between a conductive element and the equipment protection interface, measured along an insulating surface, i.e. in different use cases, the insulating material presents a charging phenomenon as it is electrically polarized around the conductor. The electrical gap is the shortest spatial distance measured between two conductive elements or between a conductive element and a device protection interface, i.e. the shortest distance through which insulation can be achieved by air while ensuring stable and safe electrical performance.
Fig. 1 shows a schematic view of the creepage distance D1 and the electrical clearance D2 between two adjacent electrical component pins P1, P2 (in another example, wires) on a conventional PCB board. In the structure shown in fig. 1, since there is no isolation structure between two adjacent electrical element pins, a sufficiently large gap between the electrical element pins is required to be provided to ensure electrical safety between the two electrical elements.
Based on the above background, the applicant of the present utility model proposes an electrical isolation assembly, which is configured to slot a position with a high voltage spacing requirement in a PCB, and isolate a high voltage signal propagating in a circuit by penetrating the slot position with a high dielectric strength material, so as to achieve the purpose of increasing an electrical gap and a creepage distance.
Fig. 2 shows a schematic view of a circuit board 1 comprising an electrical isolation assembly according to an exemplary embodiment of the utility model. The electrical isolation assembly is used for isolating at least two adjacent electrical component pins P1, P2 arranged on the PCB 1. "adjacent" means herein: an electrical gap or creepage distance needs to be considered between two conductors (electrical component pins or wires) provided on a PCB board, and thus needs to be isolated or an object to be isolated.
In another example, the electrical isolation assembly may also be used to isolate two adjacent wires disposed on the PCB board 1. For convenience of description, the specific structure of the electrical isolation assembly according to the present utility model will be described below by taking only the electrical component pins P1, P2 as examples.
The electrical isolation assembly according to the utility model is characterized in that it comprises a slot 10 arranged between two electrical component pins P1, P2 on the PCB board 1.
In addition, the electrical isolation assembly may further include an isolation structure 30, the isolation structure 30 having an engagement end and a free end opposite the engagement end.
As an example, the isolation structure 30 is formed as a separate structure from the circuit board 1, the engagement end of the isolation structure 30 is received in the slot 10 of the circuit board 1, and the free end of the isolation structure 30 extends away from the electrical component pins P1, P2 in a direction perpendicular to the circuit board 1. It will be appreciated that in order to increase the creepage distance D1 and the electrical clearance D2 between the electrical component pins P1, P2, the free ends of the isolation structure 30 are arranged at a distance above the electrical component pins P1, P2.
As another example, the isolation structure 30 may be formed as one piece with the circuit board 1, in which case the slot 10 may be filled with an insulating material (e.g., a high dielectric strength material).
The slot 10 may be provided through the circuit board 1 and the electrical isolation assembly may further include a support plate 20 provided under the circuit board 1, the engagement end of the isolation structure 30 extending through the slot 10 and being fixed to the support plate 20.
In the present example, the isolation structure 30 is shown as a baffle extending through the slot 10, which baffle is designed to be raised above two adjacent electrical component pins P1, P2 to be isolated on the PCB board. The shield defines a continuous insulating surface extending between its engagement and free ends.
For example, the isolation structure 30 is made of an insulating material, which may be made of a high dielectric strength material, for example.
The support plate 20 may be formed as a mechanical housing for an electrical device, in particular comprising a circuit board for providing the insulation assembly, or as a part of the housing, which may be made of an insulating material or metal. The insulating material for the housing may, for example, be selected from a material different from the high dielectric strength material of the isolation structure 30, for example, a cheaper plastic material.
In the case where the housing is made of an insulating material, the isolation structure 30 may be formed as one piece with the housing. In the case where the housing is made of metal, the isolation structure 30 is formed as a separate structure that can be fixed or supported on the housing.
As shown in fig. 2, since the isolation structure 30 is provided between two adjacent electrical component pins P1, P2, the shortest path between two conductive components to be isolated, measured along the insulating surface, is increased, and the shortest spatial distance between the two conductive components is also increased, that is, by providing the isolation structure 30, the creepage distance and the electrical gap between the electrical components are increased.
The utility model also relates to a circuit board, in particular a PCB board, comprising the electrical isolation assembly shown in this embodiment example. The utility model furthermore relates to an electrical device comprising a housing made of an insulating material (e.g. plastic) or metal and a circuit board arranged in the housing, such as the circuit board shown in fig. 2. The housing may be formed by the support plate 20 or the support plate may be formed as part of the housing.
In summary, the electrical isolation assembly/circuit board according to the present utility model can increase the creepage distance while increasing the electrical clearance without increasing the volume of the circuit board, and can reduce the manufacturing cost.
In the present utility model, the term "connected" preferably means "communication connection" or "electrical connection". Furthermore, the term "comprising" means that the technical solution of the present application does not exclude the case of having other units not directly or explicitly stated, besides having units directly or explicitly stated in the description and the claims. In the present utility model, it will be appreciated by those of ordinary skill in the art that the disclosed apparatus may be implemented in other ways.
While the utility model has been described in terms of preferred embodiments, the utility model is not limited thereto. Various changes and modifications can be made without departing from the spirit and scope of the utility model, and the scope of the utility model is therefore to be determined by the appended claims.
Claims (10)
1. An electrical isolation assembly for isolating at least two adjacent conductors provided on a circuit board (1), characterized in that the electrical isolation assembly comprises:
a slot (10) disposed between said at least two adjacent conductors; and
an isolation structure (30) having an engagement end and a free end opposite the engagement end, the engagement end being received in the slot (10), the free end extending away from the at least two adjacent conductors in a direction perpendicular to the circuit board.
2. The electrical isolation assembly of claim 1, wherein the slot is disposed through the circuit board, and further comprising a support plate (20) disposed below the circuit board, the engagement end of the isolation structure extending through the slot and being secured to the support plate.
3. The electrical isolation assembly of claim 2 wherein the isolation structure (30) is a baffle extending through the slot, the baffle defining a continuous insulating surface extending between the engagement end and the free end.
4. An electrical isolation assembly according to claim 2 or claim 3 wherein the isolation structure is formed in one piece with the support plate; alternatively, the isolation structure is formed as a separate structure from the support plate.
5. An electrical isolation assembly according to claim 2 or 3, characterized in that the isolation structure (30) is made of an insulating material; and/or the support plate (20) is made of an insulating material or metal.
6. An electrical isolation assembly according to any of claims 1 to 3 wherein the at least two adjacent conductors comprise electrical component pins (P1, P2) or wires.
7. A circuit board, characterized in that it comprises an electrical isolation assembly according to any one of claims 1 to 6.
8. The circuit board of claim 7, wherein the circuit board is a PCB board.
9. An electrical device, the electrical device comprising:
a housing made of an insulating material or metal; and
the circuit board of claim 7 or 8, the circuit board being disposed in the housing.
10. Electrical device according to claim 9, characterized in that a support plate (20) for supporting the insulating structure (30) is formed as part of the housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223054637.8U CN219248161U (en) | 2022-11-17 | 2022-11-17 | Electrical isolation assembly, circuit board and electrical device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223054637.8U CN219248161U (en) | 2022-11-17 | 2022-11-17 | Electrical isolation assembly, circuit board and electrical device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219248161U true CN219248161U (en) | 2023-06-23 |
Family
ID=86838756
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223054637.8U Active CN219248161U (en) | 2022-11-17 | 2022-11-17 | Electrical isolation assembly, circuit board and electrical device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219248161U (en) |
-
2022
- 2022-11-17 CN CN202223054637.8U patent/CN219248161U/en active Active
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