阅读说明：本技术 一种pcb板配合件、装配方法及终端设备 (PCB fitting part, assembly method and terminal equipment ) 是由 刘慧江 于 2021-08-12 设计创作，主要内容包括：本发明公开了一种PCB板配合件、装配方法及终端设备。本发明提供的所述PCB板配合件与PCB板相配合,所述PCB板上设置有电池连接器,所述电池连接器上设置有电池连接器补强钢片,所述PCB板配合件包括配合件本体,所述配合件本体上设置有天线以及石墨片,所述石墨片上设置有缺口,所述缺口与所述电池连接器补强钢片对应设置。本发明提供的PCB板配合件中,将与PCB板上的电池连接器补强钢片接触的部分石墨片去除,这样,通过石墨片传递至电池连接器的电磁能量会减少甚至消失,进而不会导致电压检测电路产生异常波动,解决移动终端OTA测试中的掉电问题。(The invention discloses a PCB board fitting piece, an assembly method and terminal equipment. The PCB fitting piece provided by the invention is matched with a PCB, a battery connector is arranged on the PCB, a battery connector reinforcing steel sheet is arranged on the battery connector, the PCB fitting piece comprises a fitting piece body, an antenna and a graphite sheet are arranged on the fitting piece body, a notch is arranged on the graphite sheet, and the notch is arranged corresponding to the battery connector reinforcing steel sheet. In the PCB board fitting piece provided by the invention, part of the graphite flake which is contacted with the battery connector reinforcing steel sheet on the PCB board is removed, so that electromagnetic energy transmitted to the battery connector through the graphite flake can be reduced or even disappeared, further, abnormal fluctuation of a voltage detection circuit can not be caused, and the problem of power failure in OTA test of the mobile terminal is solved.)

1. The utility model provides a PCB board fitting piece, PCB board fitting piece and PCB board cooperate, be provided with the battery connector on the PCB board, be provided with battery connector reinforcement steel sheet on the battery connector, PCB board fitting piece includes the fitting piece body, be provided with antenna and graphite flake on the fitting piece body, its characterized in that, be provided with the breach on the graphite flake, the breach with battery connector reinforcement steel sheet corresponds the setting.

2. The PCB board mating piece of claim 1, wherein the antenna is a DCS antenna.

3. The PCB board fitting part of claim 1, wherein the graphite sheet is provided with an adhesive surface, and the graphite sheet is attached to the fitting part body through the adhesive surface.

4. The PCB board mating member of claim 1, wherein the area of the notch in the graphite sheet is not less than the area of the battery connector reinforcing steel sheet.

5. The PCB board mating member of claim 1, wherein the graphite sheet has a first copper foil disposed thereon, the first copper foil having a strip shape, and a length of the first copper foil is equal to 1/4 wavelengths of the signal of the antenna.

6. The assembly method of the PCB board fitting piece is characterized in that the PCB board fitting piece is matched with a PCB board, a battery connector is arranged on the PCB board, a battery connector reinforcing steel sheet is arranged on the battery connector, and the assembly method comprises the following steps:

mounting an antenna at a first preset position on the mating member body;

and removing the part of the graphite flake after attaching the graphite flake to a second preset position on the fitting piece body so as to generate a notch on the graphite flake, wherein the notch is arranged corresponding to the reinforcing steel sheet of the battery connector.

7. The assembly method of the PCB board fitting piece is characterized in that the PCB board fitting piece is matched with a PCB board, a battery connector is arranged on the PCB board, a battery connector reinforcing steel sheet is arranged on the battery connector, and the assembly method comprises the following steps:

removing part of the graphite sheet so that the graphite sheet is attached to a second preset position on the fitting piece body after a notch is generated, wherein the notch is arranged corresponding to the battery connector reinforcing steel sheet;

an antenna is mounted at a first predetermined location on the mating body.

8. A terminal device, characterized in that the terminal device comprises a PCB board and a PCB board fitting member according to any one of claims 1-4, the PCB board is fitted with the PCB board fitting member.

9. The terminal device of claim 8, wherein the PCB board has a second copper foil disposed thereon, the second copper foil overlying the battery connector, the second copper foil being in electrical communication with the PMU shield cap, the second copper foil having an on-resistance of less than 1 ohm with the PMU shield cap.

10. The terminal device of claim 8, wherein the PCB board is provided with a filter capacitor, and the filter capacitor is arranged between a signal terminal of a power supply VBAT and the battery connector.

Technical Field

The invention relates to the technical field of PCB (printed circuit board), in particular to a PCB fitting part, an assembly method and terminal equipment.

Background

Mobile terminals are widely used, and before the mobile terminals leave a factory, various tests are required to verify the performance of the mobile terminals. The ota (over The air) test is a test on The radiation performance of The whole mobile terminal, and is one of performance tests which are required to be performed before The mobile terminal leaves a factory.

In practical application, the mobile terminal has a power failure condition in a call process, and particularly, when the mobile terminal OTA tests, some mobile terminals have power failure even in a network starting and searching process.

Thus, there is a need for improvements and enhancements in the art.

Disclosure of Invention

The invention aims to provide a PCB (printed circuit board) matching part, an assembling method and terminal equipment, and aims to solve the problem of power failure of a mobile terminal in the conversation process in the prior art.

In order to achieve the purpose, the invention adopts the following technical scheme:

the first aspect of the invention provides a PCB (printed circuit board) fitting piece, wherein the PCB fitting piece is matched with a PCB, a battery connector is arranged on the PCB, a battery connector reinforcing steel sheet is arranged on the battery connector, the PCB fitting piece comprises a fitting piece body, an antenna and a graphite sheet are arranged on the fitting piece body, a notch is formed in the graphite sheet, and the notch and the battery connector reinforcing steel sheet are arranged correspondingly.

The PCB board fitting piece, wherein, the antenna is the DCS antenna.

The PCB board fitting piece, wherein, the graphite flake is attached on the fitting piece body.

The PCB board fitting piece, wherein, the area of the breach on the graphite flake is no less than the area of battery connector reinforcement steel sheet.

The PCB board fitting piece, wherein, be provided with first copper foil on the graphite flake, first copper foil is rectangular shape, the length of first copper foil equals the 1/4 wavelength of the signal of antenna.

In a second aspect of the present invention, there is provided an assembling method of a mating member of a PCB, the mating member of the PCB is mated with the PCB, the PCB is provided with a battery connector, and the battery connector is provided with a battery connector reinforcing steel sheet, wherein the assembling method includes:

mounting an antenna at a first preset position on the mating member body;

and removing the part of the graphite flake after attaching the graphite flake to a second preset position on the fitting piece body so as to generate a notch on the graphite flake, wherein the notch is arranged corresponding to the reinforcing steel sheet of the battery connector.

A third aspect of the present invention provides an assembling method of a PCB panel mating member, as provided in the first aspect of the present invention, the PCB panel mating member being mated with a PCB panel, the PCB panel being provided with a battery connector, the battery connector being provided with a battery connector reinforcing steel sheet, wherein the assembling method includes:

removing part of a graphite sheet so that the graphite sheet is attached to a second preset position on the fitting piece body after the notch is generated, wherein the notch is arranged corresponding to the battery connector reinforcing steel sheet;

an antenna is mounted at a first predetermined location on the mating body.

In a third aspect of the present invention, a terminal device is provided, wherein the terminal device includes a PCB board and the PCB board mating member provided in the first aspect of the present invention, and the PCB board is mated with the PCB board mating member.

Terminal equipment, wherein, be provided with the second copper foil on the PCB board, the second copper foil covers on battery connector, the second copper foil electrically conducts with PMU shielding lid, the second copper foil with PMU shielding lid's on-resistance is less than 1 ohm.

The terminal equipment, wherein, be provided with filter capacitor on the PCB board, filter capacitor sets up between power VBAT signal end and battery connector.

Compared with the prior art, the embodiment of the invention has the following advantages:

compared with the prior art, the invention provides a PCB board fitting piece, an assembling method and terminal equipment. The PCB fitting piece provided by the invention is matched with a PCB, the PCB fitting piece is matched with the PCB, a battery connector is arranged on the PCB, a battery connector reinforcing steel sheet is arranged on the battery connector, the PCB fitting piece comprises a fitting piece body, an antenna and a graphite sheet are arranged on the fitting piece body, a notch is arranged on the graphite sheet, and the notch is arranged corresponding to the battery connector reinforcing steel sheet on the PCB. The power failure of the mobile terminal in the OTA test is that the electromagnetic energy generated by the antenna is transmitted to the battery connector reinforcing steel sheet by the graphite sheet on the PCB matching piece and further acts on the voltage detection circuit at the VBAT signal end of the battery power supply wiring, so that the voltage detection circuit generates abnormal fluctuation, the output of the VPH-PWR is closed, and finally the power failure of the whole machine is caused.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a PCB fitting member according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of a notch of a mating member of a PCB according to an embodiment of the present invention, the notch corresponding to a reinforcing steel sheet of a battery connector on the PCB; (ii) a

FIG. 3 is a schematic view of a PCB fitting piece provided by the present invention with a first copper foil;

FIG. 4 is a diagram showing the test results of disposing the notch and disposing the first copper foil in the embodiment of the PCB fitting member provided by the present invention;

FIG. 5 is a schematic diagram of a second copper foil disposed on a PCB board mated with a mating piece of the PCB board in an embodiment of the terminal device provided by the present invention;

fig. 6 is a schematic diagram of a filter capacitor disposed on a PCB board mated with a mating component of the PCB board in an embodiment of the terminal device provided by the present invention.

Detailed Description

The invention aims to provide a PCB (printed circuit board) matching part, an assembling method and terminal equipment, which can effectively solve the problem of power failure of a mobile terminal in the conversation process in the prior art.

In order to make the objects, technical solutions and effects of the present invention clearer and clearer, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. Further, "connected" or "coupled" as used herein may include wirelessly connected or wirelessly coupled. As used herein, the term "and/or" includes all or any element and all combinations of one or more of the associated listed items.

It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

Example one

In one embodiment of the present invention, a mating member for a PCB is provided. The PCB board fitting piece is a device matched with the PCB board. A Printed Circuit Board (PCB), which is also called a Printed Circuit Board (PCB), is an important electronic component, a support for electronic components, and a carrier for electrically interconnecting electronic components. Almost every electronic device, as small as electronic watches, calculators, as large as computers, communication electronics, military weaponry systems, requires electronic components such as integrated circuits, and printed circuit boards are used to electrically interconnect the various components. The printed circuit board consists of an insulating bottom plate, a connecting lead and a welding disc for assembling and welding electronic elements, and has double functions of a conductive circuit and the insulating bottom plate. The circuit can replace complex wiring to realize electrical connection among elements in the circuit, thereby simplifying the assembly and welding work of electronic products, reducing the wiring workload in the traditional mode and greatly lightening the labor intensity of workers; and the volume of the whole machine is reduced, the product cost is reduced, and the quality and the reliability of the electronic equipment are improved. The printed circuit board has good product consistency, can adopt standardized design, and is beneficial to realizing mechanization and automation in the production process. Meanwhile, the whole printed circuit board subjected to assembly and debugging can be used as an independent spare part, so that the exchange and maintenance of the whole product are facilitated. At present, printed wiring boards have been used very widely in the manufacture of electronic products.

In mobile terminal, there is a PCB board for mobile terminal's mainboard, is provided with the main electrical part among the mobile terminal on this PCB board, including battery connector reinforcement steel sheet, specifically, battery connector reinforcement steel sheet is used for carrying out the reinforcement (promptly, the structure reinforcing) to battery connector, guarantees SMT's roughness. Specifically, SMT is a Surface mount Technology (abbreviated Surface mount Technology), which is the most popular Technology and process in the electronic assembly industry, and is a Circuit mounting Technology in which a leadless or short-lead Surface mount device (SMC/SMD, hereinafter referred to as a chip device) is Mounted on a Surface of a Printed Circuit Board (PCB) or other substrate, and then soldered or assembled by reflow soldering or dip soldering.

The mobile terminal also has a PCB mating part that mates with the PCB, which is generally referred to as a cover plate, an upper bracket, etc. in the art, and since the PCB mating part that mates with the main PCB is provided with an antenna, the PCB mating part is also referred to as an antenna bracket. Still be provided with the graphite flake on the PCB board fitting piece, the graphite flake contacts with the PCB board for heat conduction heat dissipation. The graphite flake is except that heat conduction dispels the heat, still has certain electric conductivity, just like the transmission line on the PCB, can carry electromagnetic energy, and, electrically conductive material's electromagnetic energy conduction efficiency is higher than the air, the inventor discovers, exactly because the electromagnetic energy that the antenna on the PCB board fitting piece produced is conducted the battery connector reinforcement steel sheet on the PCB board through the graphite flake that is used for heat conduction heat dissipation, and then has used the voltage detection circuit of battery power supply line VBAT signal end to have used, lead to voltage detection circuit to produce abnormal fluctuation, close VPH-PWR's output, finally lead to the complete machine to fall the power. Based on the discovery, the invention provides a PCB board matching piece which is used for solving the problem of abnormal shutdown caused by power failure of the whole terminal.

As shown in fig. 1, an embodiment of the PCB fitting piece provided by the present invention includes a fitting piece body, and a graphite sheet 100 and an antenna 200 are disposed on the fitting piece body, so that for assembly, the graphite sheet 100 is attached to the fitting piece body, specifically, an adhesive surface is disposed on the graphite sheet 100, and the graphite sheet 100 is attached to the fitting piece body through the adhesive surface. The graphite sheet 100 is provided with a notch 110, as shown in fig. 2, the notch 110 is matched with the PCB matching piece, the battery connector reinforcing steel sheet on the PCB is correspondingly arranged, when the PCB matching piece is matched with the PCB, no graphite is arranged above the battery connector reinforcing steel sheet on the PCB, the antenna 200 conducts electromagnetic energy of the battery connector reinforcing steel sheet to the propagation path, the electromagnetic energy of the voltage detection circuit which is acted on the VBAT signal end of the battery power supply wiring and sent by the antenna 200 is reduced, even the electromagnetic energy sent by the antenna 200 can not be acted on the voltage detection circuit which is acted on the VBAT signal end of the battery power supply wiring, and the problem of power failure of the whole machine is solved. The graphite material itself is very easy to machine, that is, the notch 110 formed on the graphite sheet 100 can be easily formed by directly cutting out a part of the graphite at the corresponding position of the graphite sheet 100, and no additional material cost is required.

The notch 110 may be an open type or a closed type, and the position of the notch 110 may be any position of the graphite sheet 100, specifically, according to the position of the battery connector reinforcing steel sheet on the PCB board matched with the PCB mating piece.

In one possible implementation, the antenna 200 is a DCS antenna, that is, the antenna 200 is used for transmitting and receiving signals in the DCS band.

During assembly, the graphite sheet 100 without the notch 110, i.e. the complete graphite sheet 100, is attached to the mating body, and then a portion of the graphite on the graphite sheet 100 is removed to obtain the notch 110. The size and the shape of the graphite sheet 100 can be determined according to the design and heat conduction and dissipation requirements of a PCB matched with a PCB matching piece, the shape of the notch 110 can be consistent with that of the battery connector reinforcing steel sheet, for example, the shape of the battery connector reinforcing steel sheet is a rectangle, the shape of the notch 110 can also be inconsistent with that of the battery connector reinforcing steel sheet, but in order to ensure that the interference of the antenna 200 on a voltage detection circuit of a battery power supply wiring VBAT signal end is as small as possible, the area of the notch 110 on the graphite sheet 100 is not smaller than that of the battery connector reinforcing steel sheet, and the electromagnetic energy emitted by the antenna 200 is thoroughly cut off and is conducted to the propagation path of the battery connector reinforcing steel sheet.

Because with graphite flake 100 is attached dig partial graphite and form under the state on the fitting piece body the operation of breach 110 is inconvenient, can lead to assembly efficiency to reduce, consequently, in a possible implementation, can be first complete process out on the graphite flake 100 breach 110 will exist again the graphite flake 100 of breach 110 is proposed and is paid on the fitting piece body, like this, can be according to with a processing anchor clamps is made in advance to size and the position of battery connector reinforcement steel sheet on the PCB board of PCB board fitting piece complex, realize right on the graphite flake the batch automatic processing of breach promotes the production efficiency of PCB fitting piece.

In a possible implementation manner, the interference of the electromagnetic wave emitted by the antenna 200 can be reduced by an 1/4-wavelength antenna absorption method, as shown in fig. 3, a first copper foil may be disposed on the graphite sheet 100, the first copper foil is in a strip shape, and the length of the first copper foil is equal to 1/4 wavelength of the signal of the operating frequency band of the antenna 200. Taking the DCS antenna as an example, the 1/4 wavelength corresponding to the DCS band is 4 cm. The first copper foil may have a length of 2-3 mm. It can be understood that the mode of setting up first copper foil on the graphite flake on the PCB board fitting piece can be implemented alone, can set up simultaneously on the PCB board fitting piece first copper foil with the breach, also can only set up first copper foil does not set up the breach or only set up the breach does not set up first copper foil, and sets up first copper foil needs to increase the cost of copper foil and electrically conductive sponge.

The test is carried out by only arranging the notch and only arranging the first copper foil, and the result is shown in fig. 4, so that the mode of only arranging the notch and only arranging the first copper foil can realize the above-mentioned situation that the power is not cut off in the test, but the material cost is brought by arranging the first copper foil, therefore, in practice, only the notch can be preferentially arranged.

In summary, the present invention provides a PCB fitting piece, wherein the PCB fitting piece is fitted with a PCB, the PCB fitting piece includes a fitting piece body, the fitting piece body is provided with an antenna and a graphite sheet, the graphite sheet is provided with a notch, and the notch is arranged corresponding to a battery connector reinforcing steel sheet on the PCB. The power failure of the mobile terminal in the OTA test is that the electromagnetic energy generated by the antenna is transmitted to the battery connector reinforcing steel sheet by the graphite sheet on the PCB matching piece and further acts on the voltage detection circuit at the VBAT signal end of the battery power supply wiring, so that the voltage detection circuit generates abnormal fluctuation, the output of the VPH-PWR is closed, and finally the power failure of the whole machine is caused.

Example two

Based on the PCB board mating member provided in the foregoing embodiment, in another embodiment of the present invention, there is also provided an assembling method of the PCB board mating member provided in the first embodiment, the assembling method includes:

mounting the antenna at a first preset position on the mating member body;

and removing part of the graphite sheet after attaching the graphite sheet to a second preset position on the fitting body so as to generate the notch on the graphite sheet.

Specifically, when the PCB board mating member provided in the first embodiment is assembled, a complete graphite sheet may be manufactured, and the size and shape of the complete graphite sheet are determined according to the design and heat conduction and dissipation requirements of the PCB board mated with the PCB board mating member. And after the complete graphite sheet is attached to the second preset position on the fitting piece body, removing part of the graphite sheet so as to generate the notch on the graphite sheet. It should be noted that the step of mounting the antenna at the first predetermined position on the mating body may be performed before the graphite sheet is attached at the second predetermined position on the mating body, or may be performed after the graphite sheet is attached at the second predetermined position on the mating body, which is not limited in this respect.

EXAMPLE III

Based on the PCB board mating member provided in the foregoing embodiment, in another embodiment of the present invention, there is also provided an assembling method of the PCB board mating member provided in the first embodiment, the assembling method includes:

removing part of the graphite sheet so that the graphite sheet is attached to a second preset position on the fitting piece body after the notch is generated on the graphite sheet;

the antenna is mounted at a first predetermined position on the mating body.

After the complete graphite sheet is attached to the fitting body, the step of digging out the part of the graphite sheet may reduce the assembly efficiency on the production line, and therefore, in this embodiment, the notch is processed on the graphite sheet and then attached to the fitting body. Therefore, a processing clamp can be manufactured in advance according to the size and the position of the reinforcing steel sheet of the battery connector on the PCB matched with the PCB matching piece, and the notches on the graphite sheets can be automatically processed in batches. In the assembly during the PCB board fitting piece, can directly will produce behind the breach the graphite flake is attached on the second on the fitting piece body is predetermine the position, like this, can avoid the graphite flake is attached processing inconvenient, the problem of inefficiency to the graphite flake under the state on the fitting piece body. It should be noted that, the step of mounting the antenna at the first predetermined position on the mating body may be before attaching the graphite sheet to the second predetermined position on the mating body, or after attaching the graphite sheet to the second predetermined position on the mating body, which is not limited in this respect.

Example four

Based on the PCB board mating part provided in the above embodiment, in another embodiment of the present invention, a terminal device is further provided, where the terminal device may be any terminal device having a PCB board, the terminal device includes the PCB board mating part provided in the above embodiment, and the PCB board mating part is mated with the PCB board in the terminal device.

Namely, the PCB board fitting piece that includes in the terminal equipment includes the fitting piece body, be provided with the battery connector on the PCB board, be provided with battery connector reinforcement steel sheet on the battery connector, be provided with antenna and graphite flake on the fitting piece body, its characterized in that, be provided with the breach on the graphite flake, the breach with battery connector reinforcement steel sheet on the PCB board in the terminal equipment corresponds the setting, specifically as in embodiment one.

Further, the antenna in the PCB board mating piece included in the terminal device is a DCS antenna, which is specifically described in embodiment one.

Further, the graphite sheet of the PCB board fitting included in the terminal device is attached to the fitting body, as described in embodiment one.

Further, the area of the notch on the graphite sheet in the PCB board fitting piece included in the terminal device is not smaller than the area of the battery connector reinforcing steel sheet, as described in embodiment one.

Further, a first copper foil is arranged on the graphite sheet in the PCB board fitting piece included in the terminal device, the first copper foil is in a strip shape, and the length of the first copper foil is equal to 1/4 wavelength of the signal of the antenna, which is specifically described in embodiment one.

Can be through to PCB board fitting piece complex PCB board improves and realizes solving the problem that the terminal falls down, specifically, in a possible implementation, can set up the second copper foil on the PCB board, as shown in fig. 5, the second copper foil covers on battery connector, the second copper foil well electrically switches on with PMU (Power Management Unit) shield lid, the on-resistance requirement of second year-on-ratio and PMU shield lid is less than 1 ohm. The mode of arranging the second copper foil on the PCB can reduce or eliminate the interference of electromagnetic energy generated by the antenna on the voltage detection circuit by a shielding method. It is worth mentioning that the way of setting up the notch on the graphite sheet on the PCB fitting piece and setting up the second copper foil on the PCB board can be combined to implement, also can be implemented alone, namely, only set up the notch on the graphite sheet on the PCB fitting piece, do not set up the second copper foil on the PCB board, or only set up the second copper foil on the PCB board, do not set up the notch on the graphite sheet on the PCB fitting piece, set up on the PCB board the way of second copper foil needs to increase the material cost of copper foil, and stability depends on the stability of copper foil laminating simultaneously.

In another possible implementation manner, a filter capacitor may be disposed on the PCB to solve the power-down problem of the terminal, and specifically, as shown in fig. 6, the filter capacitor is disposed between the signal terminal of the power VBAT and the battery connector (indicated by an arrow in fig. 6). In order to ensure that the effect of preventing the terminal from being powered down is improved, the filter capacitor is 10 pF. It should be noted that the way of providing the notch on the graphite sheet on the mating member of the PCB and the way of providing the filter capacitor on the PCB may be implemented in combination or may be implemented separately, that is, only the notch is provided on the graphite sheet on the mating member of the PCB and the filter capacitor is not provided on the PCB, or only the filter capacitor is provided on the PCB and the notch is not provided on the graphite sheet on the mating member of the PCB. The design of the PCB is required to be changed when the filter capacitor is arranged on the PCB, and the proofing and verification period is longer.

Finally, it should be noted that: other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This invention is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. The invention is not limited to the precise arrangements described above and shown in the drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims. The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and any modifications, equivalents, improvements, etc. that fall within the spirit and principle of the present invention should be construed as being included in the scope of the present invention.