CN112822828A

CN112822828A - Circuit for improving electrostatic protection capability of WiFi module

Info

Publication number: CN112822828A
Application number: CN202011627257.1A
Authority: CN
Inventors: 李双文; 陈平; 何群奎
Original assignee: Chengdu Xuguang Technology Co ltd
Current assignee: Chengdu Xuguang Technology Co ltd
Priority date: 2020-12-31
Filing date: 2020-12-31
Publication date: 2021-05-18
Anticipated expiration: 2040-12-31
Also published as: CN112822828B

Abstract

The present invention relates to the field of integrated circuits. The circuit comprises a shell and a WIFI module main body arranged in the shell, wherein a mechanical key is arranged on the shell at a position opposite to a switch unit of the WIFI module main body; the WIFI module comprises a WIFI module body and is characterized by further comprising a static buffer loop, wherein the static buffer loop comprises a static absorption capacitor arranged on the WIFI module body, and the static absorption capacitor is communicated with a grounding copper sheet of the WIFI module body to form a loop; the position of the electrostatic absorption capacitor is opposite to the gap between the mechanical key and the shell. The WIFI module main body can effectively prevent external static invasion, plays a role in protecting the WIFI module main body, greatly improves the antistatic performance of the WIFI module main body, and is simple in structure, low in cost and easy to arrange.

Description

Circuit for improving electrostatic protection capability of WiFi module

Technical Field

The invention relates to the field of integrated circuits, in particular to a circuit for improving the electrostatic protection capability of a WiFi module.

Background

With the popularization of electronic devices such as smart televisions, the WiFi module is more and more important as a key component for the smart television to work. In general, in order to avoid the television screen from blocking the WiFi module from receiving wireless signals, the WiFi module is installed at a position below the television screen. People can often touch the module shell, and human static electricity can enter the module through the gap of the module shell to cause the damage of a static electricity sensitive device in the module. Especially in dry autumn and winter, the human static can reach more than 15KV, if do not carry out electrostatic protection to the module, just damage the wiFi module very easily, cause the unable problem of working of smart TV.

WiFi modules currently on the market generally improve the electrostatic protection capability of the module by adding ESD tubes to the terminals of the module connector. However, this protection only improves the electrostatic protection of the module connection terminals and does not protect against static electricity entering through gaps in the module housing. In order to improve the electrostatic protection capability of the gap of the module shell, most of the modules on the market adopt a scheme of adding an antistatic rubber pad at the gap of the shell, but the antistatic rubber pad has high cost and complex structure, the shell structure of the whole module needs to be modified, and meanwhile, the performance index of the WiFi module can be changed due to the fact that the shell structure needs to be modified and the positions of components and parts of a printed board are adjusted; therefore, how to provide a simple, effective and low-cost electrostatic protection scheme is a great problem to be solved urgently in the industry.

Disclosure of Invention

The invention aims to provide a circuit for improving the electrostatic protection capability of a WiFi module, which can prevent external static electricity from entering the WiFi module from a shell gap, reduce the influence of the static electricity on the function of the WiFi module, has a simple structure, does not change the original structure of the WiFi module, is low in cost and is convenient to popularize and apply.

In order to achieve the purpose of the invention, the technical scheme adopted by the invention is as follows: a circuit for improving the electrostatic protection capability of a WiFi module comprises a shell and a WIFI module main body arranged in the shell, wherein a mechanical key is arranged on the shell at a position opposite to a switch unit of the WIFI module main body;

the WIFI module comprises a WIFI module body and is characterized by further comprising a static buffer loop, wherein the static buffer loop comprises a static absorption capacitor arranged on the WIFI module body, and the static absorption capacitor is communicated with a grounding copper sheet of the WIFI module body to form a loop; the position of the electrostatic absorption capacitor is opposite to the gap between the mechanical key and the shell.

Preferably, the mechanical key is a spring plate area surrounded by a U-shaped gap on the housing.

Preferably, the electrostatic absorption capacitor includes a capacitor C1 and a capacitor C2, and the capacitor C1 and the capacitor C2 are respectively opposite to two sides of the U-shaped gap.

Preferably, a groove cavity for accommodating the WIFI module main body is formed in the body of the shell, the WIFI module main body is located in the groove cavity, and the mechanical key is located at the upper part of the body; the top of the body is also provided with an upper protective edge, and the lower part of the body is provided with a lower protective edge.

Preferably, the inward surface of the WIFI module main body is provided with a shielding cover.

Preferably, a module connector is arranged on the WIFI module main body.

The beneficial effects of the invention are concentrated and expressed as follows: can effectually protect external static invasion, play the effect of protection WIFI module main part for the antistatic behavior of WIFI module main part obtains very big promotion, and simple structure, with low costs, easily overall arrangement. Specifically, in the using process, when a user presses the mechanical key, static electricity attached to the hand is collected in the static electricity absorption capacitor for storage, and then is gradually released through the grounding copper sheet, so that the static electricity sensitive device in the WIFI module main body can be protected, the WIFI module and the smart television are prevented from being damaged by the static electricity, and the safety of the WIFI module and the smart television is protected. Meanwhile, the grounding copper sheet of the WIFI module main body is only required to be widened and lengthened, and then the static absorption capacitor corresponding to the position is additionally arranged on the grounding copper sheet.

Drawings

FIG. 1 is a schematic front view of the present invention;

FIG. 2 is a schematic view of the backside of the present invention;

FIG. 3 is a schematic side view of the present invention;

fig. 4 is a schematic circuit diagram of the electrostatic buffer circuit.

Detailed Description

With reference to fig. 1-4, a circuit for improving the electrostatic protection capability of a WiFi module includes a housing 1 and a WiFi module main body 2 disposed in the housing 1, where the housing 1 is used to mount the WiFi module main body 2, as shown in fig. 1-3, a body 5 of the housing 1 is provided with a slot cavity for accommodating the WiFi module main body 2, the WiFi module main body 2 is located in the slot cavity, and the WiFi module main body 2 is provided with a module connector 9 for connecting with a smart television; generally, the inward surface of the WIFI module body 2 is provided with a shielding cover 8. The top of body 5 still is provided with safe edge 6, and the lower part of body 5 is provided with safe edge 7 down, first crimp 6 and safe edge 7 are attached on TV shell down, realize stable the installation. Of course, in order to be installed in cooperation with different models of smart televisions, the shape of the shell 1 can be designed adaptively. The WIFI module is characterized in that a mechanical key 3 is arranged on the shell 1 at a position opposite to the switch unit of the WIFI module main body 2, and the mechanical key 3 is located on the upper portion of the body 5.

The switch unit may be a reset switch unit, a power switch unit, or some other switch units that need to be physically operated, and the mechanical key 3 is used to operate the switch unit. The specific form of the mechanical key 3 may be a rocker type, a pin type, etc., and the present invention may be used as long as a gap is reserved on the housing 1 to satisfy the form of the action of the mechanical key 3. As shown in fig. 1, the mechanical key 3 is a spring plate area surrounded by a U-shaped gap 0 on the housing 1, and the switch unit is operated by pressing the spring plate area, during which static electricity attached to the hand may enter the WIFI module body 2 through the gap 0 to damage the static sensitive element.

To this end, the invention also comprises an electrostatic buffer circuit, the principle of which is shown in fig. 4. The static buffer circuit comprises a static absorption capacitor 4 arranged on the WIFI module main body 2, and the static absorption capacitor 4 is conducted with a grounding copper sheet of the WIFI module main body 2 to form a circuit. The electrostatic absorption capacitor 4 is located opposite to the gap 0 between the mechanical key 3 and the housing 1. As shown in the figure, the mechanical key 3 has a U-shaped slot 0, and in order to ensure the protection of the two slots against static electricity, the static electricity absorbing capacitor 4 includes a capacitor C1 and a capacitor C2, and the capacitor C1 and the capacitor C2 are respectively opposite to the two sides of the U-shaped slot 0.

In the using process of the intelligent WIFI module, when a user presses the mechanical key 3, static electricity attached to the hand is collected in the static electricity absorption capacitor 4 for storage, and then is gradually released through the grounding copper sheet, so that the static electricity sensitive device in the WIFI module main body 2 can be protected, the static electricity sensitive device is prevented from being damaged, and the function of protecting the WIFI module and the intelligent television is achieved. Meanwhile, the grounding copper sheet of the WIFI module main body 2 is only required to be widened and lengthened, and then the static absorption capacitor 4 corresponding to the position is additionally arranged on the grounding copper sheet, compared with the traditional mode, the structure is simpler, the cost is lower, the original layout of the WIFI module main body 2 is not required to be changed, secondary design is not required, and the popularization and the promotion are very convenient. After the protection scheme provided by the invention is adopted, the electrostatic damage below 20KV can be generally resisted, the highest 15KV static generated by a human body basically cannot cause adverse effect, the type of the electrostatic absorption capacitor 4 is changed, and even higher electrostatic voltage can be further adapted, so that a person skilled in the art can select the type of the electrostatic absorption capacitor 4 according to actual conditions.

Claims

1. A circuit for improving electrostatic protection capability of a WiFi module is characterized in that: the WIFI module comprises a shell (1) and a WIFI module main body (2) arranged in the shell (1), wherein a mechanical key (3) is arranged on the shell (1) at a position opposite to a switch unit of the WIFI module main body (2);

the WIFI module is characterized by further comprising a static buffer loop, wherein the static buffer loop comprises a static absorption capacitor (4) arranged on the WIFI module main body (2), and the static absorption capacitor (4) is communicated with a grounding copper sheet of the WIFI module main body (2) to form a loop; the position of the electrostatic absorption capacitor (4) is opposite to the gap (0) between the mechanical key (3) and the shell (1).

2. The circuit for improving the WiFi module electrostatic protection capability of claim 1, wherein: the mechanical key (3) is a spring sheet area which is surrounded by a U-shaped gap (0) on the shell (1).

3. The circuit for improving the WiFi module electrostatic protection capability of claim 2, wherein: the electrostatic absorption capacitor (4) comprises a capacitor C1 and a capacitor C2, and the capacitor C1 and the capacitor C2 are respectively opposite to two sides of the U-shaped gap (0).

4. The circuit for improving the WiFi module electrostatic protection capability of claim 3, wherein: a groove cavity for accommodating the WIFI module main body (2) is formed in the body (5) of the shell (1), the WIFI module main body (2) is located in the groove cavity, and the mechanical key (3) is located at the upper portion of the body (5); the top of the body (5) is also provided with an upper protective edge (6), and the lower part of the body (5) is provided with a lower protective edge (7).

5. The circuit for improving the electrostatic protection capability of the WiFi module of claim 4, wherein: WIFI module main part (2) one side inwards is provided with shielding lid (8).

6. The circuit for improving the WiFi module electrostatic protection capability of claim 5, wherein: and a module connector (9) is arranged on the WIFI module main body (2).