WO2020238424A1

WO2020238424A1 - Circuit board stacking structure, mounting method and terminal

Info

Publication number: WO2020238424A1
Application number: PCT/CN2020/083705
Authority: WO
Inventors: 沈建伟
Original assignee: 维沃移动通信有限公司
Priority date: 2019-05-24
Filing date: 2020-04-08
Publication date: 2020-12-03
Also published as: CN110165443A; CN110165443B

Abstract

Provided are a circuit board stacking structure, a mounting method and a terminal. The circuit board stacking structure comprises: an insulating mounting base having an accommodating space therein; and a first circuit board and a second circuit board arranged in a stacked manner, wherein the first circuit board is located in the accommodating space, and a first electrical connection member is formed on a side wall of the first circuit board; and at least one metal elastic sheet is arranged on the insulating mounting base, and the metal elastic sheet is located in the accommodating space. A first electrical connection part is formed on each metal elastic sheet, and the first electrical connection part protrudes towards the interior of the accommodating space and abuts against the corresponding first electrical connection member on the side wall of the first circuit board; and a second electrical connection part is also formed on each metal elastic sheet, and the second electrical connection part is electrically connected to a second electrical connection member on the second circuit board.

Description

Circuit board stacking structure, installation method and terminal

Cross references to related applications

This application claims the priority of Chinese Patent Application No. 201910439002.3 filed in China on May 24, 2019, the entire content of which is incorporated herein by reference.

Technical field

The embodiments of the present disclosure relate to the technical field of circuit boards, and in particular to a circuit board stacking structure, an installation method, and a terminal.

Background technique

Modern portable smart terminals are made smaller and smaller in order to be portable, and the internal design layout is becoming more and more compact. The use of space at each corner is particularly important. Taking mobile terminal equipment as an example, in order to maintain a beautiful appearance, it is inconvenient to increase the area of the circuit board (hereinafter referred to as PCB), because increasing the PCB area will affect the appearance size, but in order to place more devices on the PCB , Sometimes it is necessary to double-layer PCB layout in order to make full use of the space in the height direction to place more devices.

In the related art, there is a stacking method similar to a "sandwich", that is, a PCB 103 is sandwiched between two

PCBs

101 and 102, and then three PCBs are welded together, as shown in Figure 1. Finally, the three PCBs are welded together to achieve the purpose of double-layer PCB assembly. For the stacking method shown in Figure 1, three PCBs need to be welded together, and the three PCBs need to be welded twice to weld them together. There are many welding processes, the installation is difficult, and it is not easy to disassemble.

Summary of the invention

The embodiments of the present disclosure provide a circuit board stack structure, an installation method, and a terminal, so as to solve the problem of inconvenience in installation and disassembly of the circuit board stack structure in the related art.

In order to solve the above technical problems, the present disclosure adopts the following technical solutions:

In the first aspect, a circuit board stacking structure is provided, including:

An insulating mounting seat, which has an accommodating space inside;

The first circuit board and the second circuit board are stacked, there is a gap between the first circuit board and the second circuit board, and the first circuit board is located in the accommodating space. A first electrical connector is formed on the side wall of a circuit board;

Wherein, the insulating mounting seat is provided with at least one metal shrapnel, the metal shrapnel is located in the accommodating space, each of the metal shrapnel is formed with a first electrical connection portion, and the first electrical connection portion faces The accommodating space protrudes and abuts against the corresponding first electrical connector on the side wall of the first circuit board, each of the metal elastic pieces is also formed with a second electrical connection portion, and the second The electrical connection part is electrically connected with the second electrical connection member on the second circuit board.

In a second aspect, a terminal is provided, including the circuit board stack structure described above.

In a third aspect, a circuit board mounting method is provided, and the method includes:

An insulating mounting seat is provided; wherein the interior of the insulating mounting seat has an accommodating space, and at least one metal elastic piece is provided on the insulating mounting seat, and the metal elastic piece is in the accommodating space;

Install the first circuit board in the accommodating space of the insulating mounting seat, and abut the first electrical connection piece on the side wall of the first circuit board with the first electrical connection portion of the metal elastic sheet; wherein, The first electrical connection portion protrudes toward the accommodating space;

The second electrical connector on the second circuit board is electrically connected to the second electrical connector on the metal elastic sheet.

In the embodiments of the present disclosure, the circuit board can abut against the metal elastic sheet used for electrical connection between the circuit boards, so that it is very convenient both when the circuit board is installed or when the circuit board is removed.

Description of the drawings

In order to explain the technical solutions of the embodiments of the present disclosure more clearly, the following will briefly introduce the accompanying drawings used in the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present disclosure. For those of ordinary skill in the art, without creative labor, other drawings can be obtained from these drawings.

Fig. 1 shows a schematic diagram of a circuit board stack structure in the related art;

FIG. 2 shows one of the top views of a circuit board stack structure provided by an embodiment of the present disclosure;

3 shows one of the side cross-sectional views of the circuit board stack structure provided by the embodiment of the present disclosure;

FIG. 4 shows an enlarged schematic diagram of A in FIG. 2 provided by an embodiment of the present disclosure;

Figure 5 shows one of the structural schematic diagrams of the metal shrapnel provided by the embodiment of the present disclosure;

FIG. 6 shows one of the structural schematic diagrams of the metal shrapnel and the insulating mount provided by the embodiment of the present disclosure;

FIG. 7 shows the second top view of the circuit board stack structure provided by the embodiment of the present disclosure;

FIG. 8 shows the second side cross-sectional view of the circuit board stack structure provided by the embodiment of the present disclosure;

FIG. 9 shows an enlarged schematic diagram of B in FIG. 7 provided by an embodiment of the present disclosure;

10 shows the second structural diagram of the metal shrapnel provided by the embodiment of the present disclosure;

FIG. 11 shows the second structural diagram of the metal shrapnel and the insulating mounting seat provided by the embodiment of the present disclosure;

FIG. 12 shows a schematic flowchart of a circuit board mounting method provided by an embodiment of the present disclosure.

Detailed ways

Hereinafter, exemplary embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

According to one aspect of the embodiments of the present disclosure, a circuit board stack structure is provided.

The circuit board stacking structure includes: an insulating mounting seat 201, a first circuit board 202, and a second circuit board 203.

The insulating mounting seat 201 has an accommodating space 2011 inside, that is, a accommodating space 2011 is formed in a hollow center. At least one metal elastic piece 204 is provided on the insulating mounting seat 201, specifically the metal elastic piece 204 is arranged on the side wall of the accommodating space 2011 and is located in the accommodating space 2011. The metal elastic sheet 204 is electrically connected to the first circuit board 202 and the second circuit respectively.

The first circuit board 202 and the second circuit board 203 are stacked, and there is a gap of a preset distance between the first circuit board 202 and the second circuit board 203, that is, the first circuit board 202 and the second circuit board 203 are spaced apart, In this way, components can also be arranged on the opposing surfaces of the two circuit boards, so as to make full use of the space in the height direction and place more components on the circuit board.

Among the first circuit board 202 and the second circuit board 203, at least the first circuit board 202 is located in the accommodating space 2011. Wherein, the side wall of the first circuit board 202 has a first electrical connection member 2021, each metal spring 204 is formed with a first electrical connection portion 2041, and the first electrical connection portion 2041 protrudes toward the accommodating space 2011, and It abuts against the corresponding first electrical connector 2021 on the side wall of the first circuit board 202. In addition, each metal elastic piece 204 is also formed with a second electrical connection portion 2042, and the second electrical connection portion 2042 is electrically connected to the second electrical connection member 2031 on the second circuit board 203.

In the circuit board stacking structure provided by the embodiments of the present disclosure, the circuit board can abut against the metal elastic sheet used for electrical connection between the circuit boards. In this way, it is very effective whether the circuit board is installed or the circuit board is removed. Convenient and conducive to mass production. In addition, compared to some circuit board stacking structures in the related art that electrically connect two circuit boards through a circuit board or a flexible printed circuit board (FPC), the metal spring in the embodiments of the present disclosure, Lower cost is conducive to reducing production costs.

Optionally, the insulating mounting base 201 can be made of an insulating material, such as a plastic material, to avoid affecting the electrical connection between the circuit boards. Among them, at least one accommodating space 2011 can be formed on one insulating mounting seat 201, so as to facilitate the installation of circuit boards according to requirements.

Optionally, the first electrical connection member 2021 on the side wall of the first circuit board 202 may be a structure such as a conductive contact sheet, a metal pin, etc., which are commonly used electrical connection structures with mature technology and high stability. Wherein, in order to evenly receive the force on the circuit board, the metal elastic sheets 204 may be evenly distributed and arranged on the sidewall of the accommodating space 2011.

Optionally, in the embodiment of the present disclosure, the metal dome 204 is clamped to the insulating mounting seat 201. Compared with some technical solutions in the related art that electrically connect two circuit boards through a circuit board or a flexible circuit board, it can The beneficial effect of convenient installation and disassembly is achieved.

As for the clamping method of the metal spring 204 and the insulating mounting seat 201, the insulating mounting seat 201 is provided with a clamping groove 2012, and the clamping groove 2012 is adjacent to the side wall of the accommodating space 2011. The metal spring 204 is bent into a substantially U-shaped structure by a metal strip. The first side wall 2043 of the metal spring 204 is disposed in the clamping groove 2012 of the insulating mounting seat 201, and the second side wall 2044 is located in the accommodating space 2011 , So as to realize the clamping connection between the metal spring 204 and the insulating mounting seat 201. In addition, in order to improve the installation firmness of the metal spring 204, the end of the second side wall 2044 can be bent upward to form a barb structure 2045, which abuts against the side wall of the accommodating space 2011.

Furthermore, the circuit board stack structure further includes: a frame panel 205.

The frame panel 205 is used to carry the insulating mounting seat 201, the first circuit board 202 and the second circuit board 203. In the embodiment of the present disclosure, through the frame panel 205, the circuit board stack structure can be installed in the terminal neatly and orderly.

The circuit board stacking structure provided by the embodiments of the present disclosure is briefly described above, and the circuit board stacking structure will be further explained in two embodiments below.

In an embodiment of the present disclosure, as shown in FIGS. 2 and 3, the insulating mounting seat 201 is at least partially embedded in the frame panel 205, and the first circuit board 202 and the second circuit board 203 are both located on the insulating mounting seat 201 In the accommodating space 2011, the first circuit board 202 and the first circuit board 202 are arranged in parallel. The first circuit board 202 and the second circuit board 203 are electrically connected by a metal spring 204 arranged on the side wall of the accommodating space 2011.

In the embodiment of the present disclosure, the insulating mounting seat 201 can be insert-molded into the frame panel 205 through an insert injection molding process, and the second circuit board 203, like the first circuit board 202, is also located on the insulating mounting seat 201. In the placement space 2011, such a structural design can design the first circuit board 202 and the second circuit board 203 to have the same size, thereby placing more components and improving the space utilization. Especially for future 5G products, with many devices and small device content, this structure can be used to effectively solve the problem of insufficient device layout space.

Optionally, as shown in FIG. 2, in this embodiment, at least two trapezoidal grooves 2052 are formed on the side wall of the frame panel 205 in contact with the insulating mounting seat 201, and the bottom area of the trapezoidal groove 2052 is smaller than the opening area. . During insert injection molding, the insulating mounting seat 201 and the frame panel 205 contact the side wall, forming a trapezoidal protrusion 2013 matching the shape of the trapezoidal groove 2052, through this structural design, can improve the insert on the frame panel 205 firmness.

Optionally, as shown in FIGS. 3 and 5, a first electrical connection portion 2041 and a second electrical connection portion 2042 are formed on the metal dome 204, and the first electrical connection portion 2041 and the second electrical connection portion 2042 are both facing the housing The space 2011 is convex. 3 and 4, the first electrical connection member 2021 is provided on the side wall of the first circuit board 202, and the first electrical connection portion 2041 on the metal spring 204 corresponds to the first electrical connection portion 2041 on the side wall of the first circuit board 202. The electrical connectors 2021 abut against each other. The side wall of the second circuit board 203 has a second electrical connector 2031, and the second electrical connector 2042 on the metal spring 204 abuts against the corresponding second electrical connector 2031 on the side wall of the second circuit board 203. Among them, the first electrical connector 2021 on the side wall of the first circuit board 202 and the second electrical connector 2031 on the side wall of the second circuit board 203 can be conductive contacts, metal pins, and other structures. These structures are commonly used. The electrical connection structure, mature technology and high stability.

In this embodiment, both the first circuit board 202 and the second circuit board 203 are in contact with the metal elastic sheet 204, which can facilitate the mounting and disassembly of the circuit board in the circuit board stack structure. In addition, since the insulating mounting seat 201 is embedded in the frame panel 205, the space occupied by the insulating mounting seat 201 in the height direction can be reduced.

Optionally, as shown in FIG. 3, the side of the frame panel 205 facing the second circuit board 203 is provided with at least one first support column 2051, and the second circuit board 203 abuts against the first support column 2051.

In this embodiment, in order to provide more space for component installation, at least one first support post 2051 is provided on the side of the frame panel 205 facing the second circuit board 203. Under the support of the first support post 2051, There is a gap of a preset distance between the frame panel 205 and the second circuit board 203, which can provide installation space for installing components on the surface of the second circuit board 203 facing the frame panel 205.

In order to improve the stability of the circuit board installation, the second circuit board 203 and the frame panel 205 can be fixedly connected. Specifically, a fixing bolt 206 passes through the second circuit board 203 and is screwed to the first supporting column 2051, wherein the first supporting column 2051 is provided with a threaded hole matching the fixing bolt 206.

Furthermore, as shown in FIG. 3, in order to improve the stability of the circuit board installation, at least one second support post 207 can be provided between the first circuit board 202 and the second circuit board 203, and a fixing bolt 206 passes through The first circuit board 202, the second support post 207, and the second circuit board 203 are screwed to the first support post 2051. Such a structural design can ensure the firmness of the circuit board stack structure and improve the stability of the structure.

Optionally, as shown in FIG. 6, in this embodiment, the metal elastic piece 204 is clamped to the insulating mounting seat 201.

As for the clamping method of the metal spring 204 and the insulating mounting base 201, as shown in FIG. 6, a clamping groove 2012 is formed on the insulating mounting base 201, and the clamping groove 2012 is adjacent to the side wall of the accommodating space 2011. The metal spring 204 is bent into a substantially U-shaped structure by a metal strip. The first side wall 2043 of the metal spring 204 is disposed in the clamping groove 2012 of the insulating mounting seat 201, and the second side wall 2044 is located in the accommodating space 2011, and A first electrical connection portion 2041 and a second electrical connection are formed on the second side wall 2044. In addition, in order to improve the installation firmness of the metal spring 204, the end of the second side wall 2044 can be bent upward to form a barb structure 2045, which abuts against the side wall of the accommodating space 2011. Wherein, each metal elastic piece 204 can be set to correspond to a clamping slot 2012.

In order to better understand the technical solution described in this embodiment, the following further describes the implementation steps of this embodiment.

It is assumed that the first electrical connector 2021 on the side wall of the first circuit board 202 and the second electrical connector 2031 on the side wall of the second circuit board 203 are both golden fingers.

The implementation steps of this embodiment can be described as follows:

1. Inject the insulating mounting seat 201 on the frame panel 205 by injection molding.

2. On the side walls of the accommodating space 2011 formed on the insulating mounting seat 201, a plurality of metal elastic sheets 204 are installed for contacting and connecting the stacked first circuit board 202 and the second circuit board 203.

Wherein, each elastic piece is made with two convex hulls (respectively corresponding to the first electrical connection portion 2041 and the second electrical connection portion 2042), which are respectively used to contact the gold fingers on the first circuit board 202 and the second circuit board 203 Connect to maintain the electrical connection between the two circuit boards. One electrical network connection corresponds to one shrapnel, so the number of shrapnel can be set according to the required connection network. In order to uniformly receive the force of the circuit board, the metal elastic sheets 204 can be uniformly arranged on the side walls of the accommodating space 2011 according to the number of connected networks.

3. Make gold fingers on the side walls of the first circuit board 202 and the second circuit board 203 respectively for contact and connection with the metal shrapnel 204, and the electrical network traces that need to be connected on the circuit board are respectively connected to the corresponding gold fingers .

4. Assemble the first circuit board 202 and the second circuit board 203 in the accommodating space 2011 in the upper and lower order required by the design. The gold fingers on the side walls of the first circuit board 202 and the second circuit board 203 The position corresponds to the position of the metal spring 204 to be connected, and the first circuit board 202 and the second circuit board 203 are firmly fixed by the fixing bolt 206, thereby completing the first circuit board 202 and the second circuit board 203 assembly.

Compared with related technologies, the circuit board stack structure in this embodiment is simpler in assembly and production, avoids the trouble of PCB or FPC connecting two circuit boards, has lower cost, and is convenient to disassemble. Conducive to mass production. In addition, compared with the traditional circuit board stacking structure, the upper and lower PCBs can be made the same size, more devices can be placed, and the space utilization rate is higher.

The above is the description of one embodiment provided in the present disclosure, and the description of another embodiment in the present disclosure will be continued below.

In another embodiment of the present disclosure, as shown in FIGS. 7 and 8, the first circuit board 202 is located in the accommodating space 2011 of the insulating mounting seat 201, and the insulating mounting seat 201 is fixed on the second circuit board 203, The second circuit board 203 is fixed on the frame panel 205.

In this embodiment, an insulating mounting base 201 is separately formed, and the insulating mounting base 201 is mounted on the second circuit board 203, the second circuit board 203 is mounted on the frame panel 205, and the first circuit board 202 is mounted In the accommodating space 2011 of the insulating mounting seat 201. For such a circuit board stack structure, the manufacturing process and installation method are simpler.

Optionally, as shown in FIG. 8 and FIG. 10, a first electrical connection portion 2041 and a second electrical connection portion 2042 are formed on the metal elastic sheet 204. The first electrical connection portion 2041 protrudes toward the accommodating space 2011, and the second electrical connection portion 2042 extends between the insulating mounting seat 201 and the second circuit board 203. As shown in FIG. 8 and FIG. 9, the first electrical connection member 2021 is provided on the side wall of the first circuit board 202, and the first electrical connection portion 2041 on the metal spring 204 corresponds to the first electrical connection portion 2041 on the side wall of the first circuit board 202. The electrical connectors 2021 abut against each other. The second circuit board 203 has a second electrical connector 2031 (not marked in the figure), and the second electrical connector 2042 on the metal spring 204 is welded to the corresponding second electrical connector 2031 on the second circuit board 203 . Among them, the first electrical connector 2021 on the side wall of the first circuit board 202 can be conductive contacts, metal pins, etc., and the first electrical connector on the side wall of the second circuit board 203 can be a pad, etc. Structure. These structures are commonly used electrical connection structures with mature technology and high stability.

In this embodiment, the first circuit board 202 is in contact with the metal spring 204, which makes the installation and removal of the first circuit board 202 more convenient; the second circuit board 203 is welded to the metal spring 204, so that the installation of the second circuit board 203 The process is simpler.

Optionally, as shown in FIG. 8, at least one first support post 2051 is provided on the side of the frame panel 205 facing the second circuit board 203, the first support post 2051 is provided with a threaded hole, and a fixing bolt 206 passes through the first support post 2051. The second circuit board 203 is screwed to the first supporting column 2051.

In this embodiment, in order to provide more space for component installation, at least one first support column 2051 is provided on the side of the frame panel 205 facing the second circuit board 203. Under the support of the first support column 2051, There is a gap of a preset distance between the frame panel 205 and the second circuit board 203, which can provide installation space for installing components on the surface of the second circuit board 203 facing the frame panel 205.

Optionally, as shown in FIG. 11, in this embodiment, the metal elastic piece 204 is clamped to the insulating mounting seat 201.

As for the clamping manner of the metal spring 204 and the insulating mounting base 201, as shown in FIG. 11, it may be: a clamping groove 2012 is opened on the insulating mounting base 201, and the clamping groove 2012 is adjacent to the side wall of the accommodating space 2011. The metal elastic piece 204 is bent into a substantially U-shaped structure by a metal strip. The first side wall 2043 of the metal elastic piece 204 is disposed in the clamping groove 2012 of the insulating mounting seat 201, and the end of the first side wall 2043 extends to the insulating mounting seat 201 Between it and the second circuit board 203, a second electrical connection portion 2042 is formed. The second side wall 2044 outside the clamping groove 2012 is located in the accommodating space 2011, and a first electrical connection portion 2041 is formed on the second side wall 2044. In addition, in order to improve the installation firmness of the metal elastic piece 204, the end of the second side wall 2044 can be bent upward to form a barb structure 2045, which abuts against the side wall of the accommodating space 2011. Wherein, each metal elastic piece 204 can be set to correspond to a clamping slot 2012.

Assume that the first electrical connector 2021 on the side wall of the first circuit board 202 is a golden finger, and the second electrical connector 2031 on the second circuit board 203 is a pad.

1. The insulating mounting seat 201 is separately injection molded.

2. On the side walls of the accommodating space 2011 formed on the insulating mounting seat 201, a number of metal elastic sheets 204 are installed to realize the electrical connection between the first circuit board 202 and the second circuit board 203.

Wherein, each elastic piece is formed with a convex hull (corresponding to the first electrical connection portion 2041) for contact and connection with the golden finger on the first circuit board 202. Each elastic piece is also formed with a solder foot (corresponding to the first electrical connection portion 2041) for soldering with a pad on the second circuit board 203. One electrical network connection corresponds to one shrapnel, so the number of shrapnel can be set according to the required connection network. In order to uniformly receive the force of the circuit board, the metal elastic sheets 204 can be uniformly arranged on the side walls of the accommodating space 2011 according to the number of connected networks.

3. On the side wall of the first circuit board 202, make gold fingers that are in contact with the metal shrapnel 204, and make a pad for welding with the metal shrapnel 204 on the surface of the second circuit board 203. The electrical network traces to be connected on the first circuit board 202 are connected to the corresponding golden fingers, and the electrical network traces to be connected on the second circuit board 203 are connected to the corresponding pads.

4. Solder the insulating mounting base 201 on the first circuit board 202.

5. Fix the second circuit board 203 on the frame panel 205 with screws.

6. Assemble the first circuit board 202 in the accommodating space 2011 of the insulating mounting seat 201, and contact and connect with the metal spring 204.

Compared with related technologies, the circuit board stack structure in this embodiment is simpler in assembly and production, avoids the trouble of PCB or FPC connecting two circuit boards, has lower cost, and is convenient to disassemble. Conducive to mass production.

The foregoing is the description of another embodiment provided by the present disclosure.

To sum up, in the circuit board stacking structure provided by the embodiments of the present disclosure, the circuit board can abut against the metal shrapnel used for electrical connection between the circuit boards, so that whether it is during installation of the circuit board or removal of the circuit board It is very convenient to use, which is conducive to mass production. In addition, compared to some circuit board stacking structures in the related art that electrically connect two circuit boards through a circuit board or a flexible circuit board, the metal dome in the embodiment of the present disclosure has a lower cost, which is beneficial to reduce production costs. .

According to another aspect of the present disclosure, a terminal is provided, which includes the circuit board stack structure as described in the above-mentioned embodiments, and the circuit board stack structure is installed inside the terminal through a frame panel 205.

In the circuit board stacking structure in the terminal provided by the embodiments of the present disclosure, the circuit board can abut against the metal elastic sheet used for electrical connection between the circuit boards, so that whether it is when the circuit board is installed or when the circuit board is removed, Both are very convenient and are conducive to mass production. In addition, compared to some circuit board stacking structures in the related art that electrically connect two circuit boards through a circuit board or a flexible circuit board, the metal dome in the embodiment of the present disclosure has a lower cost, which is beneficial to reduce production costs. .

According to another aspect of the embodiments of the present disclosure, a circuit board mounting method is provided.

As shown in Figure 12, the circuit board mounting method includes:

Step 1201: Provide an insulating mount.

Wherein, the insulating mounting seat has an accommodating space inside, and at least one metal elastic piece is arranged on the insulating mounting seat. Specifically, the metal elastic piece is arranged on the side wall of the accommodating space and is located in the accommodating space.

Wherein, the insulating mounting base can be made of insulating material, such as plastic material, to avoid affecting the electrical connection between circuit boards. Among them, at least one accommodating space can be formed on one insulating mounting seat, so that the circuit board can be installed according to demand.

Step 1202: Mount the first circuit board in the accommodating space of the insulating mounting seat, and abut the first electrical connection piece on the side wall of the first circuit board with the first electrical connection portion of the metal elastic sheet.

Wherein, the first electrical connection portion protrudes toward the accommodating space.

In the embodiments of the present disclosure, the circuit board can abut against the metal elastic sheet used for electrical connection between the circuit boards, so that it is very convenient whether it is when the circuit board is installed or when the circuit board is removed, which is beneficial to mass production .

Step 1203: electrically connect the second electrical connector on the second circuit board with the second electrical connector on the metal elastic sheet.

In the embodiment of the present disclosure, the second circuit board is also electrically connected with the metal elastic sheet to realize the electrical connection between the first circuit board and the second circuit board. Compared with some circuit board stacking structures in the related art in which two circuit boards are electrically connected through a circuit board or a flexible printed circuit board (FPC), the metal spring in the embodiment of the present disclosure is more costly Low, which helps reduce production costs.

Wherein, the first circuit board and the second circuit board are stacked, and there is a gap between the first circuit board and the second circuit board, that is, the first circuit board and the second circuit board are spaced apart, In this way, components can also be arranged on the opposing surfaces of the two circuit boards, so as to make full use of the space in the height direction and place more components on the circuit board.

It should be noted that when implementing the above circuit board mounting method provided by the embodiments of the present disclosure, it is not necessary to strictly follow the above steps, and the mounting steps can be adjusted according to actual needs.

Optionally, after providing an insulating mounting seat in step 1201, the method further includes: clamping the metal spring sheet on the insulating mounting seat.

In the embodiment of the present disclosure, the metal spring sheet is clamped to the insulating mounting base. Compared with some technical solutions in the related art that use a circuit board or a flexible circuit board to electrically connect two circuit boards, it can achieve convenient installation and disassembly. Beneficial effect.

As for the clamping method of the metal shrapnel and the insulating mounting seat, a clamping groove is provided on the insulating mounting seat, and the clamping groove is adjacent to the side wall of the accommodating space. The metal shrapnel is bent into a substantially U-shaped structure by a metal strip. The first side wall of the metal shrapnel is arranged in the clamping groove of the insulating mounting seat, and the second side wall is in the accommodating space, thereby realizing the metal shrapnel and insulation The card connection of the mounting seat. In addition, in order to improve the installation firmness of the metal elastic sheet, the end of the second side wall can be bent upward to form a barb structure that abuts against the side wall of the accommodating space.

Optionally, before providing an insulating mounting seat in step 1201, the method further includes: providing a frame panel, and inserting injection molding on the frame panel to form the insulating mounting seat.

In one implementation of the embodiments of the present disclosure, the insulating mounting seat can be insert-molded into the frame panel through an insert injection molding process. Since the insulating mounting seat is embedded in the frame panel, the space occupied by the insulating mounting seat in the height direction can be reduced. Wherein, the frame panel is used to carry the insulating mounting seat, the first circuit board and the second circuit board. In the embodiment of the present disclosure, through the frame panel, the circuit board stack structure can be installed in the terminal neatly and orderly.

Further, step 1203 electrically connecting the second electrical connector on the second circuit board with the second electrical connection portion on the metal spring sheet includes: mounting the second circuit board on the insulating mounting seat In the accommodating space, the second electrical connection piece on the side wall of the second circuit board abuts the second electrical connection portion of the metal elastic sheet.

Wherein, the second electrical connection portion protrudes toward the accommodating space.

In the embodiment in which the insulating mounting seat is formed by insert injection molding on the frame panel, the first circuit board and the second circuit board are both located in the accommodating space of the insulating mounting seat, and the first circuit board and the second circuit board In parallel arrangement, the second circuit board also abuts against the metal shrapnel.

In this embodiment, the insulating mounting seat is inserted into the frame panel through the insert injection molding process, and the second circuit board, like the first circuit board, is also located in the accommodating space on the insulating mounting seat and is The metal shrapnel interferes with the connection, which can facilitate the installation and disassembly of the circuit board in the circuit board stack structure. In addition, with such a structural design, the first circuit board and the second circuit board can be designed to have the same size, thereby placing more components and improving space utilization. Especially for future 5G products, with many devices and small device content, this structure can be used to effectively solve the problem of insufficient device layout space.

As shown in FIGS. 3 and 5, a first electrical connection portion 2041 and a second electrical connection portion 2042 are formed on the metal spring 204, and both the first electrical connection portion 2041 and the second electrical connection portion 2042 protrude toward the accommodating space 2011. Up. 3 and 4, the first electrical connection member 2021 is provided on the side wall of the first circuit board 202, and the first electrical connection portion 2041 on the metal spring 204 corresponds to the first electrical connection portion 2041 on the side wall of the first circuit board 202. The electrical connectors 2021 abut against each other. The side wall of the second circuit board 203 has a second electrical connector 2031, and the second electrical connector 2042 on the metal spring 204 abuts against the corresponding second electrical connector 2031 on the side wall of the second circuit board 203. Among them, the first electrical connector 2021 on the side wall of the first circuit board 202 and the second electrical connector 2031 on the side wall of the second circuit board 203 can be conductive contacts, metal pins, etc., these structures are commonly The electrical connection structure, mature technology and high stability.

Optionally, as shown in FIG. 2, in the embodiment in which the insulating mounting seat is formed by insert injection molding on the frame panel, at least two trapezoidal recesses are formed on the side wall where the frame panel 205 contacts the insulating mounting seat 201 The groove 2052, the bottom area of the trapezoidal groove 2052 is smaller than the opening area. During insert injection molding, the insulating mounting seat 201 and the frame panel 205 are in contact with each other on the side wall, forming a trapezoidal protrusion 2013 matching the shape of the trapezoidal groove 2052. Through such a structural design, the insert on the frame panel 205 can be improved. firmness.

Further, in the embodiment in which the insulating mounting seat is formed by insert injection molding on the frame panel, as shown in FIG. 3, the frame panel 205 is provided with at least one first support column 2051 on the side facing the second circuit board 203 A threaded hole is provided on the first supporting column 2051, and the second circuit board 203 abuts against the first supporting column 2051.

In this embodiment, in order to provide more space for component installation, at least one first support column is provided on the side of the frame panel facing the second circuit board. Under the support of the first support column, the frame panel and the second circuit board There is a gap of a preset distance between the two circuit boards, which can provide installation space for installing components on the surface of the second circuit board facing the frame panel.

Wherein, after the step 1203 electrically connects the second electrical connector on the second circuit board with the second electrical connector on the metal spring sheet, the method further includes:

A fixing bolt is provided; the fixing bolt passes through the second circuit board and is screwed to the first support column.

In this embodiment, in order to improve the stability of the circuit board installation, the second circuit board can be fixedly connected to the frame panel. Specifically, a fixing bolt passes through the second circuit board and is screwed to the first support column, wherein the first support column is provided with a threaded hole matching the fixing bolt.

Furthermore, in the embodiment in which the insulating mounting seat is formed by insert injection molding on the frame panel, as shown in FIG. 3, in order to improve the stability of the circuit board installation, the first circuit board 202 and the second circuit board 202 At least one second support post 207 is arranged between the circuit boards 203, a fixing bolt 206 passes through the first circuit board 202, the second support post 207 and the second circuit board 203, and is screwed to the first support post 2051. Therefore, the step 1203 After electrically connecting the second electrical connection member on the second circuit board with the second electrical connection portion on the metal spring sheet, the method further includes:

A fixing bolt is provided; the fixing bolt is passed through the first circuit board, the second support column and the second circuit board, and is screwed to the first support column.

Such a structural design can ensure the firmness of the circuit board stack structure and improve the stability of the structure.

In order to better understand the technical solutions described in the foregoing embodiments, an example is used for further explanation below.

It is assumed that the first electrical connection piece on the side wall of the first circuit board and the second electrical connection piece on the side wall of the second circuit board are both gold fingers.

The implementation steps of this example can be described as follows:

1. Inject the insulation mount on the frame panel by injection molding.

2. On the side walls of the accommodating space formed on the insulating mounting seat, a number of metal elastic sheets are installed for contacting and connecting the stacked first circuit board and the second circuit board.

Among them, each elastic piece is made with two convex hulls (respectively corresponding to the first electrical connection part and the second electrical connection part), which are respectively used to contact and connect with the golden fingers on the first circuit board and the second circuit board to maintain Electrical connection between two circuit boards. One electrical network connection corresponds to one shrapnel, so the number of shrapnel can be set according to the required connection network. In order to evenly receive the force of the circuit board, the metal shrapnel can be evenly arranged on the side wall of the accommodating space according to the number of connected networks.

3. Make gold fingers on the side walls of the first circuit board and the second circuit board respectively for contact and connection with the metal shrapnel, and the electrical network traces that need to be connected on the circuit board are respectively connected to the corresponding gold fingers.

4. Assemble the first circuit board and the second circuit board in the accommodating space in the upper and lower order required by the design, and the positions of the golden fingers on the side walls of the first circuit board and the second circuit board are connected with the required connection The positions of the metal shrapnel correspond to each other, and the first circuit board and the second circuit board are firmly fixed by the fixing bolts, thereby completing the assembly of the first circuit board and the second circuit board.

Compared with related technologies, the circuit board stack structure in this embodiment is simpler in assembly and production, eliminating the trouble of PCB or FPC for connecting two circuit boards, lower cost, and convenient disassembly. Conducive to mass production. In addition, compared with the traditional circuit board stacking structure, the upper and lower PCBs can be made the same size, more devices can be placed, and the space utilization rate is higher.

Optionally, before providing an insulating mounting seat in step 1201, the method further includes: providing a frame panel; fixing the second circuit board on the frame panel; fixing the pre-injection molded insulating mounting seat On the second circuit board.

In another implementation of the embodiment of the present disclosure, as shown in FIGS. 7 and 8, the first circuit board 202 is located in the accommodating space 2011 of the insulating mounting base 201, and the insulating mounting base 201 is fixed to the second circuit board 203 The second circuit board 203 is fixed on the frame panel 205.

In this embodiment, an insulating mounting base is separately formed in advance, and the insulating mounting base is mounted on the second circuit board, the second circuit board is mounted on the frame panel, and the first circuit board is mounted on the insulating mounting base In the housing space. For such a circuit board stack structure, the manufacturing process and installation method are simpler.

Optionally, in this embodiment, the second electrical connection portion of the metal dome extends between the insulating mounting seat and the second circuit board.

Wherein, step 1203 electrically connects the second electrical connection member on the second circuit board with the second electrical connection portion on the metal dome, including: connecting the second electrical connection portion of the metal dome to the first The second electrical connector on the second circuit board is welded.

As shown in FIGS. 8 and 10, a first electrical connection portion 2041 and a second electrical connection portion 2042 are formed on the metal elastic sheet 204. The first electrical connection portion 2041 protrudes toward the accommodating space 2011, and the second electrical connection portion 2042 extends between the insulating mounting seat 201 and the second circuit board 203. As shown in FIG. 8 and FIG. 9, the first electrical connector 2021 is provided on the side wall of the first circuit board 202. The electrical connectors 2021 abut against each other. The second circuit board 203 has a second electrical connector 2031 (not marked in the figure), and the second electrical connector 2042 on the metal spring 204 is welded to the corresponding second electrical connector 2031 on the second circuit board 203 . Among them, the first electrical connector 2021 on the side wall of the first circuit board 202 can be conductive contacts, metal pins, etc., and the first electrical connector on the side wall of the second circuit board 203 can be a pad, etc. Structure. These structures are commonly used electrical connection structures with mature technology and high stability.

In this embodiment, the first circuit board 202 is in contact with the metal spring 204, which makes the installation and disassembly of the first circuit board 202 more convenient; the second circuit board 203 is welded to the metal spring 204, so that the installation of the second circuit board 203 The process is simpler.

Further, in this embodiment, as shown in FIG. 8, at least one first support post 2051 is provided on the side of the frame panel 205 facing the second circuit board 203, and the first support post 2051 is provided with a threaded hole, The second circuit board 203 abuts against the first supporting column 2051.

Furthermore, in this embodiment, in order to improve the stability of the circuit board installation, at least one second support post may be provided between the first circuit board and the second circuit board, and a fixing bolt passes through the first circuit board. The second supporting column is screwed to the second circuit board. Therefore, in step 1203, after the second electrical connector on the second circuit board is electrically connected to the second electrical connector on the metal spring, the Methods also include:

A fixing bolt is provided; the fixing bolt passes through the first circuit board and the second support column, and is screwed to the second circuit board.

In order to better understand the technical solution described in this implementation manner, an example is used for further explanation below.

It is assumed that the first electrical connection member on the side wall of the first circuit board is a golden finger, and the second electrical connection member on the second circuit board is a pad.

1. Pre-injection molding of the insulation mount.

2. On the side wall of the accommodating space formed on the insulating mounting seat, a number of metal shrapnels are installed to realize the electrical connection between the first circuit board and the second circuit board.

Wherein, each elastic piece is formed with a convex hull (corresponding to the first electrical connection portion) for contact and connection with the golden finger on the first circuit board. Each elastic piece is also formed with a solder foot (corresponding to the first electrical connection portion) for soldering with the pad on the second circuit board. One electrical network connection corresponds to one shrapnel, so the number of shrapnel can be set according to the required connection network. In order to evenly receive the force of the circuit board, the metal shrapnel can be evenly arranged on the side wall of the accommodating space according to the number of connected networks.

3. On the side wall of the first circuit board, make gold fingers that are in contact with the metal shrapnel, and make a pad for welding with the metal shrapnel on the surface of the second circuit board. The electrical network traces to be connected on the first circuit board are connected to the corresponding golden fingers, and the electrical network traces to be connected on the second circuit board are connected to the corresponding pads.

4. Solder the insulating mount on the first circuit board.

5. Fix the second circuit board on the frame panel with screws.

6. Assemble the first circuit board in the accommodating space of the insulating mounting seat, and contact and connect with the metal shrapnel.

To sum up, in the circuit board mounting method provided by the embodiments of the present disclosure, the circuit board can abut against the metal spring used for electrical connection between the circuit boards, so that whether it is during the installation of the circuit board or the removal of the circuit It is very convenient for the board, which is conducive to mass production. In addition, compared to some circuit board stacking structures in the related art that electrically connect two circuit boards through a circuit board or a flexible circuit board, the metal dome in the embodiment of the present disclosure has a lower cost, which is beneficial to reduce production costs. .

It should be understood that in the description of the present disclosure, the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " The orientation or positional relationship indicated by “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inner”, and “outer” are based on the orientation shown in the drawings or The positional relationship is only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present disclosure.

In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present disclosure, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

In the present disclosure, unless otherwise clearly defined and defined, the terms "installed", "connected", "connected", "fixed" and other terms should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection , Or integrated; it can be mechanically connected, or electrically connected, or can communicate with each other; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal communication of two components or the interaction between two components. For those of ordinary skill in the art, the specific meaning of the above-mentioned terms in the present disclosure can be understood according to specific circumstances.

In the present disclosure, unless otherwise clearly defined and defined, the "above" or "below" of the first feature of the second feature may include the first and second features in direct contact, or may include the first and second features Not in direct contact but through other features between them. Moreover, "above", "above" and "above" the second feature of the first feature include the first feature being directly above and obliquely above the second feature, or it simply means that the level of the first feature is higher than the second feature. The "below", "below" and "below" the first feature of the second feature include the first feature directly below and obliquely below the second feature, or it simply means that the level of the first feature is smaller than the second feature.

The various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments can be referred to each other.

Although the optional embodiments of the embodiments of the present disclosure have been described, those skilled in the art can make additional changes and modifications to these embodiments once they learn the basic creative concept. Therefore, the appended claims are intended to be interpreted as including alternative embodiments and all changes and modifications falling within the scope of the embodiments of the present disclosure.

Finally, it should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply these entities Or there is any such actual relationship or sequence between operations. Moreover, the terms "include", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or terminal device that includes a series of elements includes not only those elements, but also those that are not explicitly listed Other elements listed, or also include elements inherent to this process, method, article or terminal device. If there are no more restrictions, the element defined by the sentence "including a..." does not exclude the existence of other same elements in the process, method, article or terminal device that includes the element.

The above are optional implementations of the present disclosure. It should be pointed out that for those of ordinary skill in the art, several improvements and modifications can be made without departing from the principles of the present disclosure, and these improvements and modifications are also Within the protection scope of this disclosure.

Claims

A circuit board stacking structure, including:

An insulating mounting seat, which has an accommodating space inside;

The first circuit board and the second circuit board are stacked, there is a gap between the first circuit board and the second circuit board, and the first circuit board is located in the accommodating space. A first electrical connector is formed on the side wall of a circuit board;

Wherein, the insulating mounting seat is provided with at least one metal shrapnel, the metal shrapnel is located in the accommodating space, each of the metal shrapnel is formed with a first electrical connection portion, and the first electrical connection portion faces The accommodating space protrudes and abuts against the corresponding first electrical connector on the side wall of the first circuit board, and each of the metal elastic pieces is further formed with a second electrical connector, and the second electrical connector The electrical connection part is electrically connected with the second electrical connection member on the second circuit board.
The circuit board stack structure according to claim 1, further comprising: a frame panel carrying the insulating mounting seat, the first circuit board, and the second circuit board.
The circuit board stack structure according to claim 2, wherein the insulating mounting seat is at least partially embedded in the frame panel; the second circuit board is located in the accommodating space and is connected to the first circuit The boards are arranged in parallel.
The circuit board stack structure according to claim 3, wherein the second electrical connection portion protrudes toward the accommodating space, and resists the corresponding second electrical connection member on the side wall of the second circuit board Pick up.
The circuit board stacking structure according to claim 3, wherein at least one first support post is provided on a side of the frame panel facing the second circuit board, and a threaded hole is provided on the first support post; The fixing bolt passes through the second circuit board and is screwed to the first support column.
The circuit board stacking structure according to claim 5, wherein at least one second support post is provided between the first circuit board and the second circuit board; a fixing bolt passes through the first circuit board, The second supporting column and the second circuit board are bolted to the first supporting column.
4. The circuit board stack structure according to claim 2, wherein the insulating mounting seat is fixed on the second circuit board, and the second circuit board is fixed on the frame panel.
8. The circuit board stack structure according to claim 7, wherein the second electrical connection portion of the metal elastic sheet extends between the insulating mounting seat and the second circuit board, and is connected to the second circuit The second electrical connector on the board is welded.
The circuit board stack structure according to claim 7, wherein the frame panel is provided with at least one first support post on the side facing the second circuit board, and the first support post is provided with a threaded hole, The fixing bolt passes through the second circuit board and is screwed to the first support column.
The circuit board stack structure according to claim 1, wherein the metal elastic sheet is clamped to the insulating mounting seat.
A terminal, comprising the circuit board stack structure according to any one of claims 1 to 10.
A method for mounting a circuit board includes:

An insulating mounting seat is provided; wherein the interior of the insulating mounting seat has an accommodating space, the insulating mounting seat is provided with at least one metal dome, and the metal dome is in the accommodating space;

Install the first circuit board in the accommodating space of the insulating mounting seat, and abut the first electrical connection piece on the side wall of the first circuit board with the first electrical connection portion of the metal elastic sheet; wherein, The first electrical connection portion protrudes toward the accommodating space;

The second electrical connection piece on the second circuit board is electrically connected to the second electrical connection portion on the metal elastic sheet; wherein the first circuit board and the second circuit board are stacked, and the first circuit There is a gap between the board and the second circuit board.
The method according to claim 12, wherein before said providing an insulating mount, the method further comprises:

Provide a frame panel;

The insulating mounting seat is formed by insert injection molding on the frame panel.
The method according to claim 13, wherein the electrically connecting the second electrical connection member on the second circuit board with the second electrical connection portion on the metal elastic sheet comprises:

Installing the second circuit board in the accommodating space of the insulating mounting seat, and abutting the second electrical connection piece on the side wall of the second circuit board with the second electrical connection portion of the metal elastic sheet; wherein The second electrical connection portion protrudes toward the accommodating space, and the second circuit board is arranged in parallel with the first circuit board.
The method according to claim 14, wherein the frame panel is provided with at least one first support post on the side facing the second circuit board, and the first support post is provided with threaded holes; At least one second support post is arranged between the circuit board and the second circuit board;

After the electrically connecting the second electrical connection member on the second circuit board with the second electrical connection portion on the metal elastic sheet, the method further includes:

Provide a fixing bolt;

The fixing bolt is passed through the first circuit board, the second support column and the second circuit board, and is screwed to the first support column.