Patent Description:
This application relates to the field of soldering device technologies, in particular, to a circuit board assembly soldering apparatus and a circuit board assembly soldering method.

In modern life, mobile terminals such as mobile phones, notebook computers, and smart watches play increasingly important roles in people's daily life, work contact, and other scenarios, and have gradually become necessities of modern life.

A mobile terminal usually includes a screen assembly, a housing, a battery, a mainboard, and other parts. The battery and the mainboard are provided in a space enclosed by the screen assembly and the housing. The mainboard is usually a printed circuit board (Printed Circuit Board, PCB for short), and various components are provided on the mainboard. Some parts of the mobile terminal need to be electrically connected to some components on the mainboard. Other parts of the mobile terminal may be electrically connected to components on the mainboard through a flexible printed circuit (Flexible Printed Circuit, FPC for short). In practical operations, a laser soldering technology may be used, the FPC is first soldered on the mainboard by using a soldering device, and then the FPC is connected to the other parts of the mobile terminal.

However, an existing soldering device can solder and connect only a single FPC to a single PCB each time of soldering, and soldering efficiency is low.

<CIT> discloses a soldering method, in which components of a solder group are fixed relative to one another in a joining position and solder groups of differing heights are fixed by means of adjustable pressure plates.

This application provides a circuit board assembly soldering apparatus and a circuit board assembly soldering method according to the enclosed independent claims. Advantageous features of the present invention are defined in the corresponding subclaims.

In the following, parts of the description and drawings referring to embodiments, which are not covered by the claims, are not presented as embodiments of the invention but as examples useful for understanding the invention.

According to one aspect, this application provides a circuit board assembly soldering apparatus according to claim <NUM>.

According to the circuit board assembly soldering apparatus provided in this application, at least two bearing seats are provided on the base plate, the bearing seats are located in a space between the base plate and the pressing plate assembly, the bearing seats each include the workbench, the workbench is located on the side of the bearing seat that faces the pressing plate assembly, the circuit board assembly is placed on the workbench, and the pressing plate assembly is pressed on the circuit board assembly on the workbench, so as to provide pressure on the circuit board assembly and implement soldered connection of the circuit board assembly. At least one adjustable bearing seat is provided, and a spacing between the workbench of the adjustable bearing seat and the base plate is adjustable. Further, a spacing between the workbench of the adjustable bearing seat and the pressing plate assembly is adjusted, to implement soldered connection between circuit board assemblies with different thicknesses. With the circuit board assembly placed on each bearing seat, the soldering apparatus can connect at least two circuit board assemblies by soldering at a single time, and therefore have high soldering efficiency.

In a possible implementation, the bearing seats each further include a support frame, the support frame is connected between the workbench and the base plate, and the support frame of the adjustable bearing seat is capable of adjusting a height of the workbench relative to the base plate.

With the support frame mounted on the base plate, the support frame is used to support the workbench over the base plate, to form a soldering workspace between the workbench and the pressing plate assembly. In addition, the support frame of the adjustable bearing seat can adjust the height of the workbench, to adjust the spacing between the workbench and the pressing plate assembly based on thicknesses of different circuit board assemblies, so that pressure applied to the circuit board assembly meets a soldering pressure requirement.

In a possible implementation, the support frame of the adjustable bearing seat includes at least one support column, and the support column is supported on the base plate.

The workbench of the adjustable bearing seat is supported by using the support column, and the height of the workbench relative to the base plate is adjusted by using the support column, so as to adjust the height of the workbench, and adjust the spacing between the workbench and the pressing plate assembly.

In a possible implementation, the workbench of the adjustable bearing seat is fastened to a top end of the support column, and a height of the support column of the adjustable bearing seat is adjustable.

The workbench of the adjustable bearing seat is fastened to the top end of the support column that faces away from the base plate. The support column is provided as a support column with an adjustable height. The height of the support column is adjusted, so that the support column drives the workbench to move, to adjust the height of the workbench.

In a possible implementation, the workbench of the adjustable bearing seat is movably connected to the support column and is capable of moving along an axial direction of the support column, and the workbench of the adjustable bearing seat is capable of being fastened to different parts of the support column.

The support column is provided as a fixed structure, and the workbench is movably connected to the support column. The support column guides movement of the workbench, so that the workbench moves along the axial direction of the support column, and the workbench can be fastened to different parts of the support column, to adjust the height of the workbench relative to the base plate.

In a possible implementation, a telescopic elastic part is sleeved outside the support column of the adjustable bearing seat, the support column is inserted into the workbench, and both ends of the elastic part respectively abut against the workbench and the base plate.

With the support column inserted into the workbench and the telescopic elastic part sleeved outside the support column, the elastic part abuts against the workbench and the base plate and is arranged in between. An expansion amount of the elastic part is adjusted, so that the elastic part drives the workbench to move, to adjust the height of the workbench.

In a possible implementation, the workbench of the adjustable bearing seat is internally provided with a pressure sensor.

With the workbench of the adjustable bearing seat internally provided with the pressure sensor, the pressure sensor is used to detect pressure borne by the circuit board assembly to adjust the height of the workbench, so that the pressure borne by the circuit board assembly is within a proper range.

In a possible implementation, the at least two bearing seats include one fixed bearing seat, and a spacing between the workbench of the fixed bearing seat and the base plate is fixed.

With the fixed bearing seat provided, a height of the workbench of the fixed bearing seat cannot be adjusted. When a plurality of circuit board assemblies are simultaneously soldered, the height of the workbench of each adjustable bearing seat can be adjusted by using the workbench of the fixed bearing seat as reference. In addition, when only one circuit board assembly is soldered at a single time, the circuit board assembly may be placed on the fixed bearing seat to simplify an operation for adjusting soldering pressure and improve soldering efficiency. In addition, the soldering apparatus may be reconstructed on the basis of the original soldering apparatus having one fixed bearing seat.

In a possible implementation, the pressing plate assembly is provided with a pressure sensor, or the workbench of the fixed bearing seat is provided with a pressure sensor.

A pressure sensor is provided on the pressing plate assembly or in the workbench of the fixed bearing seat to detect a value of pressure between the workbench of the fixed bearing seat and the pressing plate assembly, so as to adjust a height of the pressing plate assembly based on this reference. After the pressing plate assembly is positioned, the height of the workbench of each adjustable bearing seat is adjusted based on a detected value of the pressure sensor in the workbench of each adjustable bearing seat.

In a possible implementation, the pressing plate assembly includes a substrate, the substrate is provided opposite to the base plate, and projections of the workbenches of all the bearing seats on the substrate each are located within a coverage area of the substrate.

With the substrate capable of covering all the bearing seats provided, the substrate is configured to be pressed on the circuit board assemblies on the workbenches of the bearing seats, and the substrate is configured to transmit laser light emitted by a laser, so that the laser light is irradiated onto surfaces of the circuit board assemblies on the workbenches.

In a possible implementation, the pressing plate assembly further includes at least two separate plates, each of the separate plates is provided on a surface on a side of the substrate that faces the base plate, the separate plates are in a one-to-one correspondence with the workbenches of the bearing seats, and the separate plates are pressed on the circuit board assemblies on the workbenches; where
a spacing exists between adjacent separate plates.

With each of the separate plates provided on the surface on the side of the substrate that faces the base plate, the separate plates are in a one-to-one correspondence with the workbenches of the bearing seats, and the circuit board assemblies are pressed between the separate plates and the workbenches. By providing the separate plates, strength of the pressing plate assembly can be increased, a pressure bearing capability of the pressing plate assembly can be improved, and reliability of the soldering apparatus can be improved. In addition, with the spacing between adjacent separate plates provided, a space between adjacent separate plates forms an avoidance space. The avoidance space can avoid some structural members on the circuit board assembly that are located outside a soldering region.

The soldering apparatus includes at least two lasers, where the at least two lasers include at least one first laser and at least one second laser, where the at least one first laser is provided on a side of the pressing plate assembly that faces away from the base plate, and laser light emitted by the at least one first laser penetrates the pressing plate assembly and is irradiated onto the circuit board assemblies on the workbenches.

The laser is arranged on the side of the pressing plate assembly that faces away from the base plate, and the laser light emitted by the laser penetrates the pressing plate assembly and is irradiated onto the circuit board assembly on the workbench. The circuit board assembly is heated by energy of the laser light, so that the circuit board assembly experiences a temperature rise. Solder paste on a PCB is melted, and the molten solder paste is squeezed and overflows to a surface on a side of an FPC that faces away from the PCB, to implement soldered connection between the FPC and the PCB.

In a possible implementation, the soldering apparatus includes at least two first lasers, where each of the lasers is provided on the side of the pressing plate assembly that faces away from the base plate, and an out-light surface of each of the lasers is in a one-to-one correspondence with each of the workbenches.

With the plurality of lasers provided on the pressing plate assembly, each laser is in a one-to-one correspondence with each workbench of each bearing seat, and laser light emitted by each laser is concentrated and irradiated onto each circuit board assembly. This can improve heating efficiency of the circuit board assembly and increase a soldering speed of the circuit board assembly.

The soldering apparatus includes at least two lasers, where the at least two lasers include at least one first laser and at least one second laser; and
the first laser is provided on the side of the pressing plate assembly that faces away from the base plate; and the second laser is provided on a side of the pressing plate assembly that faces the base plate, and the second laser is located in a gap between adjacent bearing seats.

With the first laser provided on the side of the pressing plate assembly that faces away from the base plate, laser light emitted by the first laser penetrates the pressing plate assembly and is irradiated onto the circuit board assembly on each workbench, and is used to heat the circuit board assembly. With the second laser provided on the side of the pressing plate assembly that faces the base plate, the second laser is located in the gap between adjacent bearing seats, and laser light emitted by the second laser is irradiated onto a region of a PCB that is located in a gap between adjacent workbenches, and is used to cut the PCB.

In a possible implementation, the soldering apparatus includes a plurality of lasers, where the plurality of lasers include at least two third lasers, each of the third lasers is provided corresponding to each of the bearing seats, the third laser is located between the workbench and the base plate, an out-light surface of the third laser faces the workbench, and laser light emitted by the third laser penetrates the workbench and is irradiated onto the circuit board assembly.

With the third laser provided on each bearing seat, the third laser is located below the workbench, and the laser light emitted by the third laser penetrates the workbench and is irradiated onto the circuit board assembly on the workbench. Surfaces on both sides of the circuit board assembly are simultaneously heated by using the laser above the pressing plate assembly and the third laser below the workbench. This can improve heating efficiency of the circuit board assembly, increase a soldering speed of the circuit board assembly, and improve soldering efficiency of the soldering apparatus.

In a possible implementation, a heater is provided in the workbench.

With the heater provided in the workbench of each bearing seat, the heater cooperates with the laser on the pressing plate assembly to simultaneously heat both sides of the circuit board assembly. This increases heating efficiency and a soldering speed of the circuit board assembly and improves soldering efficiency of the soldering apparatus.

According to another aspect, this application provides a circuit board assembly soldering method according to claim <NUM>.

According to the circuit board assembly soldering method provided in this application, the first circuit boards are respectively placed on the bearing seats, and the second circuit boards are attached to the first circuit boards on the workbenches. Then, the pressing plate assembly is pressed on the second circuit boards on the workbenches, to pre-press the circuit board assemblies and position the pressing plate assembly. Subsequently, based on a pressure value on the workbench of each adjustable bearing seat, a height of the workbench of each adjustable bearing seat is adjusted, and a spacing between the workbench of each adjustable bearing seat and the pressing plate assembly is adjusted, until a bearing pressure on the workbench of each adjustable bearing seat is within the preset pressure range. After a soldering pressure requirement of the circuit board assemblies is met, the height of the workbench of each adjustable bearing seat is fixed, to solder the first circuit boards to the second circuit boards.

In a possible implementation, each of the bearing seats is the adjustable bearing seat; and the pressing the pressing plate assembly on the second circuit boards on the workbenches, and adjusting a spacing between a workbench of each adjustable bearing seat and a base plate, so that a bearing pressure on each workbench is within a preset pressure range specifically includes:.

In a possible implementation, the bearing seats include one fixed bearing seat; and the pressing the pressing plate assembly on the second circuit boards on the workbenches, and adjusting a spacing between a workbench of each adjustable bearing seat and a base plate, so that a bearing pressure on each workbench is within a preset pressure range specifically includes:.

In a possible implementation, one of the first circuit board and the second circuit board is a printed circuit board, and the other is a flexible circuit board.

Terms used in implementations of this application are only used to explain specific embodiments of this application, and are not intended to limit this application.

An electronic device such as a handheld wireless communication device, a desktop computer, a laptop (laptop) computer, a tablet (Tablet) computer, an ultra-mobile personal computer (ultra-mobile personal computer, UMPC), a handheld computer, a walkie-talkie, a netbook, a POS machine, or a personal digital assistant (personal digital assistant, PDA) usually has a plurality of parts. Some parts need to be electrically connected to implement functions of the corresponding parts.

In the embodiments of this application, an example in which the electronic device is a handheld wireless communication device is used for description. <FIG> is a schematic diagram of a breakdown structure of an electronic device according to an embodiment of this application. As shown in <FIG>, for example, an electronic device <NUM> is specifically a mobile phone. The electronic device <NUM> usually includes a screen assembly <NUM>, a middle frame <NUM>, a circuit board assembly <NUM>, and a rear cover <NUM>. The screen assembly <NUM> has a display region for displaying image information (not shown in the figure). The middle frame <NUM> is provided between the screen assembly <NUM> and the rear cover <NUM> in a thickness direction of the electronic device <NUM>. The screen assembly <NUM>, the middle frame <NUM>, and the rear case <NUM> together enclose an accommodating space. The circuit board assembly <NUM> is provided in the accommodating space.

The circuit board assembly <NUM> includes a printed circuit board (Printed Circuit Board, PCB) and a flexible printed circuit (Flexible Printed Circuit, FPC).

<FIG> is a schematic diagram of a structure of a PCB according to an embodiment of this application. As shown in <FIG>, a PCB <NUM> may be a single-sided board or a double-sided board. "Single-sided board" means that components <NUM> are provided on a board surface on one side of the PCB <NUM>. "Double-sided board" means that components <NUM> are provided on board surfaces on both sides of the PCB <NUM>. The PCB <NUM> may be a radio frequency (Radio Frequency, RF) board or an application processor (Application Processor, AP) board. The radio frequency board may be configured to bear a radio frequency integrated circuit (radio frequency integrated circuit, RFIC), a radio frequency power amplifier (radio frequency power amplifier, RFPA), a wireless fidelity (wireless fidelity, Wi-Fi) chip, and the like, but is not limited thereto. The application processor board may be configured to bear a system on chip (system on chip, SOC) element, a double data rate (double data rate, DDR) memory, a primary power management unit (power management unit, PMU), a secondary power management unit, and the like, but is not limited thereto.

For example, the PCB <NUM> is a mainboard in the electronic device <NUM>. The components <NUM> provided on the PCB <NUM> may include but are not limited to a processor, an antenna module, a Bluetooth module, a Wi-Fi module, a global positioning system (Global Positioning System, GPS) module, a power supply and charging module, a graphics processing module, a screen display and operation module, and the like.

An FPC <NUM> is configured to electrically connect some functional parts of the electronic device <NUM> to corresponding components <NUM> on the PCB <NUM>. For example, through the FPC <NUM>, the screen assembly <NUM> is electrically connected to the screen display and operation module provided on the PCB <NUM>, and a camera module (not shown in the figure) is electrically connected to the graphics processing module provided on the PCB <NUM>.

In practical application, the FPC <NUM> may be connected to the PCB <NUM> through a board to board (board to board, BTB) connector. However, the BTB connector has a large volume and occupies a large space. Therefore, the BTB connector is not conducive to layout of the components <NUM> in the electronic device <NUM> and not conducive to reduction of an overall thickness of the electronic device <NUM>, and cannot meet a lightening and thinning development trend of the electronic device <NUM>.

<FIG> is a schematic diagram of a structure of a circuit board assembly according to an embodiment of this application. As shown in <FIG>, to avoid connecting the FPC <NUM> to the PCB <NUM> by using a BTB connector, currently, an FPC on board (FPC <NUM> on board, FOB) technology is usually used to implement soldered connection between the FPC <NUM> and the PCB <NUM>, so that the FPC <NUM> is attached to the PCB <NUM>. A thickness of a soldering seam between the FPC <NUM> and the PCB <NUM> is relatively small. This can reduce an overall thickness of the circuit board assembly <NUM>, and reduce a space occupied by the circuit board assembly <NUM> to make the layout of the components <NUM> in the electronic device <NUM> reasonable, and reduce the overall thickness of the electronic device <NUM>.

As shown in <FIG>, a soldering region 211a is provided on the PCB <NUM>, and the FPC <NUM> is soldered in the soldering region 211a on the PCB <NUM>. A plurality of pads <NUM> are provided in the soldering region 211a of the PCB <NUM>, and a plurality of metal conducting wires <NUM> are further arranged on the PCB <NUM>. The pads <NUM> and the components <NUM> are electrically connected by using the metal conducting wires <NUM>. For example, a material for forming the pads <NUM> and the metal conducting wires <NUM> may be but is not limited to copper or a copper alloy.

<FIG> is a diagram of a partial cross-sectional structure of an FPC according to an embodiment of this application. As shown in <FIG>, the FPC <NUM> includes a substrate <NUM>. The substrate <NUM> is a flexible dielectric layer. The flexible dielectric layer has good flexibility, so that the FPC <NUM> can be bent when subjected to an external force. A plurality of solder pins <NUM> and a plurality of metal traces <NUM> are arranged on the substrate <NUM>. The metal traces <NUM> are respectively connected to the solder pins <NUM>, and the solder pins <NUM> on the FPC <NUM> are configured to implement soldered connection to the pads <NUM> on the PCB <NUM>, to implement mutual conduction between the FPC <NUM> and the PCB <NUM>. For ease of connection between the FPC <NUM> and the PCB <NUM>, usually, the solder pins <NUM> on the FPC <NUM> are provided in a centralized manner in a region of the FPC <NUM> that is close to an end.

For example, a material for forming the flexible dielectric layer of the substrate <NUM> of the FPC <NUM> includes but is not limited to polyimide (Polyimide, PI), thermoplastic polyimide (Thermoplastic polyimide, TPI), or polyethylene terephthalate (Polyethylene terephthalate, PET). A material for forming the solder pins <NUM> and the metal traces <NUM> on the FPC <NUM> may be but is not limited to copper or a copper alloy.

Specifically, through holes 2121a are provided on the substrate <NUM> of the FPC <NUM>. The through holes 2121a run through both side surfaces of the substrate <NUM> in a thickness direction. A material such as copper or a copper alloy is attached to inner walls of the through holes 2121a to form the solder pins <NUM> of the FPC <NUM>. In addition, the solder pins <NUM> extend from the inside of the through holes 2121a to both side surfaces of the substrate <NUM> that cover peripheries of the through holes 2121a.

<FIG> is a diagram of a partial cross-sectional structure of soldered connection between an FPC and a PCB according to an embodiment of this application. As shown in <FIG>, in practical application, solder paste <NUM> may be pre-printed on the pads <NUM> of the PCB <NUM> before the FPC <NUM> is soldered to the PCB <NUM>. For example, the solder paste <NUM> may include tin and a solder flux. The FPC <NUM> may be attached to a side surface of the PCB <NUM> that is provided with the pads <NUM>, and the solder pins <NUM> on the FPC <NUM> are aligned with the pads <NUM> on the PCB <NUM> and then brought into contact with the solder paste <NUM> on the pads <NUM>. A compressive stress may be applied to a surface of one of the FPC <NUM> or the PCB <NUM> that faces away from the other, and the solder paste <NUM> on the pads <NUM> of the PCB <NUM> may be heated and melted. In this way, the molten solder paste <NUM> flows along the through holes 2121a of the FPC <NUM> under the pressing action on the FPC <NUM> and overflows from the other side of the FPC <NUM>. After the solder paste <NUM> overflows and is cured, a fixed connection between the FPC <NUM> and the PCB <NUM> is implemented. The FPC <NUM> is electrically connected to the PCB <NUM> through the solder pins <NUM> and the solder paste <NUM> in the through holes 2121a.

In addition, as the solder flux contained in the solder paste <NUM> is volatile, an additional layer of solder flux may be further coated on the solder paste <NUM> before the PCB <NUM> is soldered to the FPC <NUM>, to remove an oxide on a surface of the solder paste <NUM> and improve performance of soldering between the PCB <NUM> and the FPC <NUM>.

The soldered connection between the PCB <NUM> and the FPC <NUM> is completed on a soldering apparatus. <FIG> shows a circuit board assembly soldering apparatus in a related technology. As shown in <FIG>, the circuit board assembly soldering apparatus (referred to as soldering apparatus <NUM> for short below) includes a base plate <NUM>, a pressing plate <NUM> located above the base plate <NUM>, a laser <NUM> mounted above the pressing plate <NUM>, and bearing seats <NUM> mounted on the base plate <NUM>. The bearing seats <NUM> each include a support column <NUM> and a workbench <NUM>. A bottom end of the support column <NUM> is supported on the base plate <NUM>, the workbench <NUM> is located at a top end of the support column <NUM>, and the workbench <NUM> faces the pressing plate <NUM>.

During soldering, the PCB <NUM> is first placed on the workbench <NUM>, so that a to-be-soldered surface of the PCB <NUM> faces upward towards the pressing plate <NUM>, that is, a side surface of the PCB <NUM> that is provided with the soldering region 211a faces upward towards the pressing plate <NUM>. After the PCB <NUM> is properly placed, a layer of solder flux may be coated on the surface of the solder paste <NUM> on the pads <NUM> in the soldering region 211a of the PCB <NUM>, and then the FPC <NUM> may be stacked on the PCB <NUM>.

<FIG> is a schematic diagram of a soldering status of a circuit board assembly in a related technology. As shown in <FIG>, when the FPC <NUM> is placed, the region provided with the solder pins <NUM> at the end of the FPC <NUM> corresponds to the soldering region 211a of the PCB <NUM>, and the solder pins <NUM> on the FPC <NUM> are aligned with the pads <NUM> on the PCB <NUM>. After the FPC <NUM> is properly placed, the pressing plate <NUM> is moved downward in a Z direction to be pressed on the FPC <NUM> placed on the workbench <NUM>. Laser light emitted by the laser <NUM> heats the FPC <NUM>, so that the solder paste <NUM> on the pads <NUM> of the PCB <NUM> is melted and overflows to the side surface of the FPC <NUM> that faces away from the PCB <NUM>, to solder and fasten the FPC <NUM> to the PCB <NUM>.

Different FPCs <NUM> have different thicknesses in a processing and manufacturing process. If the soldering apparatus <NUM> shown in <FIG> is used to simultaneously solder two FPCs <NUM> on two PCBs <NUM> respectively, two circuit board assemblies <NUM> are both placed on the workbenches <NUM>, and the pressing plate <NUM> is pressed on the FPCs <NUM> in the two circuit board assemblies <NUM> at the same time. Because the two FPCs <NUM> have different thicknesses, the two FPCs <NUM> are subjected to different pressures, and have different soldering statuses. As a result, at least one circuit board assembly <NUM> cannot be normally used or may even be damaged.

For example, the solder paste <NUM> on the PCB <NUM> in one of the circuit board assemblies <NUM> does not run through both sides of the FPC <NUM>, and consequently, the circuit board assembly <NUM> is insecurely soldered, and the circuit board assembly <NUM> cannot meet a use requirement. Alternatively, the solder paste <NUM> on the PCBs <NUM> in both circuit board assemblies <NUM> runs through both sides of the FPCs <NUM>, but one of the circuit board assemblies <NUM> is subjected to an excessively large pressure. As a result, the metal traces <NUM> on the FPC <NUM> or the metal conducting wires <NUM> on the PCB <NUM> are pressed to break, and even a board body of the PCB <NUM> or the substrate <NUM> of the FPC <NUM> is cracked, causing damage to the circuit board assembly <NUM>.

Therefore, when the soldering apparatus <NUM> shown in <FIG> is used to solder the PCB <NUM> to the FPC <NUM>, a single time of soldering can usually implement soldered connection between one PCB <NUM> and one FPC <NUM>, and soldering efficiency is low.

In view of this, an embodiment of this application provides a circuit board assembly soldering apparatus. In the circuit board assembly soldering apparatus provided in this embodiment of this application, at least two bearing seats are provided, and the bearing seats include at least one adjustable bearing seat. A height of the adjustable bearing seat is adjustable, so that soldering requirements of different circuit board assemblies can be met. The soldering apparatus can implement soldered connection of at least two circuit board assemblies at a single time of soldering, and can improve soldering efficiency of circuit board assemblies.

The following describes in detail the circuit board assembly soldering apparatus provided in this embodiment of this application.

<FIG> is a schematic diagram of a structure of a circuit board assembly soldering apparatus according to Embodiment <NUM>, which is not covered by claim <NUM> of this application. As shown in <FIG>, the circuit board assembly soldering apparatus (referred to as soldering apparatus <NUM> for short below) provided in this embodiment includes a base plate <NUM>, a pressing plate assembly <NUM>, and bearing seats <NUM>. The pressing plate assembly <NUM> is oppositely provided above the base plate <NUM>. In practical application, the pressing plate assembly <NUM> and the base plate <NUM> are provided opposite to each other in a vertical space, for example, the base plate <NUM> may be located on a ground, while the pressing plate assembly <NUM> is located above the base plate <NUM> in the vertical direction. Each bearing seat <NUM> is mounted on the base plate <NUM>, and the bearing seat <NUM> is located in a space between the pressing plate assembly <NUM> and the base plate <NUM>.

The bearing seat <NUM> includes a support frame <NUM> and a workbench <NUM>. The support frame <NUM> is supported on the base plate <NUM>. The workbench <NUM> is mounted on the support frame <NUM>, and the workbench <NUM> is located on a side of the support frame <NUM> that faces the pressing plate assembly <NUM>. For example, one end of the support frame <NUM> that is connected to the base plate <NUM> is a bottom end of the support frame <NUM>, and the other end opposite to the bottom end is a top end of the support frame <NUM>. The workbench <NUM> is located at the top end of the support frame <NUM>. A workspace is formed between the pressing plate assembly <NUM> and the workbench <NUM> of the bearing seat <NUM>. During soldering, a circuit board assembly <NUM> is located in the workspace.

Specifically, during soldering, the circuit board assembly <NUM> is placed on the workbench <NUM> of the bearing seat <NUM>, the base plate <NUM> assembly is pressed on the circuit board assembly <NUM> on the workbench <NUM>, and the soldering apparatus <NUM> is used to heat the circuit board assembly <NUM> placed on the workbench <NUM>, so as to heat solder paste <NUM> on the circuit board assembly <NUM>. In addition, with the pressure action of the pressing plate assembly <NUM> on the circuit board assembly <NUM>, the molten solder paste <NUM> is squeezed to flow. After the solder paste <NUM> is cured, the circuit board assembly <NUM> is securely soldered.

As shown in <FIG>, the circuit board assembly <NUM> includes a first circuit board 21a and a second circuit board 21b. One of the first circuit board 21a and the second circuit board 21b is a PCB <NUM>, and the other is an FPC <NUM>. In some application scenarios, for example, when soldered connection is required between two PCBs <NUM>, the first circuit board 21a and the second circuit board 21b may be both PCBs <NUM>; and when soldered connection is required between two FPCs <NUM>, the first circuit board 21a and the second circuit board 21b may be both FPCs <NUM>. This is not limited in this embodiment. The following provides descriptions all by using an example in which one of the first circuit board 21a and the second circuit board 21b is a PCB <NUM>, and the other is an FPC <NUM>.

During soldering, the first circuit board 21a is first placed on the workbench <NUM>. The workbench <NUM> is generally provided with a positioning region (not shown in the figure). The first circuit board 21a is placed in the positioning region on the workbench <NUM>. For example, an identification and alignment module (not shown in the figure) may be provided on the soldering apparatus <NUM>, and the identification and alignment module is configured to determine whether the first circuit board 21a is accurately positioned, to ensure soldering performance of the circuit board assembly <NUM>.

After the first circuit board 21a is properly placed, the second circuit board 21b is stacked on the first circuit board 21a, to ensure accurate alignment of the second circuit board 21b with the first circuit board 21a. Then, the pressing plate assembly <NUM> is pressed downward on the second circuit board 21b, to generate a pressure on the second circuit board 21b and the first circuit board 21a. At the same time, the soldering apparatus <NUM> heats the first circuit board 21a and the second circuit board 21b, so that the solder paste <NUM> on pads <NUM> of the PCB <NUM> is melted. In addition, the molten solder paste <NUM> is squeezed and flows along through holes 2121a on the FPC <NUM>, and overflows from a side of the FPC <NUM> that faces away from the PCB <NUM>. After the solder paste <NUM> is cured, the soldered connection between the FPC <NUM> and the PCB <NUM> is implemented.

For the soldering apparatus <NUM> to solder at least two circuit board assemblies <NUM> at a single time, as shown in <FIG>, in this embodiment, at least two bearing seats <NUM> are mounted on the base plate <NUM> of the soldering apparatus <NUM>. One circuit board assembly <NUM> can be placed on the workbench <NUM> of each bearing seat <NUM>, so that soldered connection can be simultaneously implemented for at least two circuit board assemblies <NUM>.

<FIG> is a schematic diagram of soldering alignment of two circuit board assemblies according to the Embodiment <NUM>, which is not covered by claim <NUM> of the application. As shown in <FIG>, two bearing seats <NUM> arranged side by side are used as an example. In addition, for example, the first circuit board 21a first placed on the workbench <NUM> of the bearing seat <NUM> is the PCB <NUM>, and the second circuit board 21b stacked on the first circuit board 21a is the FPC <NUM>. The PCBs <NUM> on the two bearing seats <NUM> are placed side by side. The two FPCs <NUM> may be placed onto the two PCBs <NUM> respectively from sides of the two PCBs <NUM> that are away from the other PCB <NUM>, that is, the two FPCs <NUM> may be placed onto the respective workbenches <NUM> from sides of the two bearing seats <NUM> that are away from the other bearing seat <NUM>. In this way, interference between the two FPCs <NUM> is avoided. For example, one ends of the two FPCs <NUM> that are each provided with solder pins <NUM> in a centralized manner are close to each other, and the other ends of the two FPCs <NUM> are away from each other. When the FPC <NUM> is aligned with the PCB <NUM>, the solder pins <NUM> on the FPC <NUM> are aligned with the pads <NUM> on the PCB <NUM>.

In addition to the case in <FIG> in which two FPCs <NUM> are respectively connected to two PCBs <NUM>, in practice, there is also a case in which at least two FPCs <NUM> are connected to different soldering regions 211a on a same PCB <NUM>. For this, in this embodiment, one PCB <NUM> may be placed in a whole workspace formed between the pressing plate assembly <NUM> and each bearing seat <NUM>, and different FPCs <NUM> may be placed on workbenches <NUM> of different adjustable bearing seats 13a, so as to solder the different FPCs <NUM> to the same PCB <NUM>.

It should be noted that, as it is required to adjust heights of the workbenches <NUM> of the adjustable bearing seats 13a, the FPCs <NUM> may be first placed on the workbenches <NUM>, and then the PCB <NUM> is stacked on the FPCs <NUM>, so that the PCB <NUM> is positioned on a side of the pressing plate assembly <NUM>. For FPCs <NUM> with different thicknesses, the FPCs <NUM> can be moved by moving the workbenches <NUM>, so as to adjust an attachment pressure between the FPCs <NUM> and the PCB <NUM> to avoid damage to the PCB <NUM> when the workbenches <NUM> are moved.

In addition, for the case in which different FPCs <NUM> are soldered to a same PCB <NUM>, each adjustable bearing seat 13a may be movably mounted on the base plate <NUM>, so as to adjust a spacing between the adjustable bearing seats 13a based on a spacing between soldering regions 211a on the PCB <NUM>. In this way, the workbenches <NUM> of the adjustable bearing seats 13a are in a one-to-one correspondence with the soldering regions 211a on the PCB <NUM>, so that each FPC <NUM> on each workbench <NUM> is correspondingly soldered to each soldering region 211a on the PCB <NUM>.

Still referring to <FIG>, as an implementation, all of the bearing seats <NUM> mounted on the base plate <NUM> are adjustable bearing seats 13a, and support frames <NUM> of the adjustable bearing seats 13a can adjust heights of the workbenches <NUM> relative to the base plate <NUM>. As described above, due to the limitation by the processing and manufacturing process, thicknesses of FPCs <NUM> cannot be kept completely consistent, and there is usually a thickness difference between different FPCs <NUM>. Therefore, the adjustable bearing seats 13a with the adjustable workbenches <NUM> are provided, so as to adjust the heights of the workbenches <NUM> and control a spacing between the pressing plate assembly <NUM> and the workbenches <NUM> based on pressures required for soldering different circuit board assemblies <NUM>, thereby ensuring the pressures borne by the circuit board assemblies <NUM> are within a proper range.

It should be noted that, the pressure borne by the circuit board assembly <NUM> needs to be capable of squeezing the molten solder paste <NUM> on the PCB <NUM> to overflow from the side of the FPC <NUM> that faces away from the PCB <NUM>, thereby ensuring that the FPC <NUM> is securely soldered to the PCB <NUM>. In addition, an excessively large pressure is not suitable for the circuit board assembly <NUM>, so as to avoid damage to the structure of the FPC <NUM> or the PCB <NUM>.

In practical application, after the circuit board assemblies <NUM> are respectively placed on the workbenches <NUM> of the adjustable bearing seats 13a, the pressing plate assembly <NUM> is moved downward by a particular distance. For example, the pressing plate assembly <NUM> is moved near the second circuit boards 21b of the circuit board assemblies <NUM>, but there is a particular gap between the pressing plate assembly <NUM> and all the second circuit boards 21b. Then, the heights of the workbenches <NUM> of the adjustable bearing seats 13a are adjusted, so that the workbenches <NUM> are raised and moved towards the pressing plate assembly <NUM>, to gradually increase pressures applied by the pressing plate assembly <NUM> and the workbenches <NUM> to the circuit board assemblies <NUM>, until the pressure borne by each circuit board assembly <NUM> is within the proper range, and then the heights of the workbenches <NUM> of the adjustable bearing seats 13a are fixed to perform soldering operations of the circuit board assemblies <NUM>.

For example, initial heights of the workbenches <NUM> of the adjustable bearing seats 13a may be kept the same, that is, spacings between the workbenches <NUM> of the adjustable bearing seats 13a and the base plate <NUM> are equal. After the circuit board assemblies <NUM> are placed on the workbenches <NUM>, the pressing plate assembly <NUM> is moved downward by a particular distance. In this case, a spacing between the pressing plate assembly <NUM> and a circuit board assembly <NUM> with a largest thickness in the circuit board assemblies <NUM> is smallest. The circuit board assembly <NUM> with the largest thickness is, for example, a circuit board assembly <NUM> whose FPC <NUM> has a largest thickness. Afterwards, the workbenches <NUM> of the adjustable bearing seats 13a are raised, until the pressure borne by each circuit board assembly <NUM> is within the proper range.

It can be understood that, after the pressing plate assembly <NUM> is moved downward and positioned, it is possible that a pressure borne by the circuit board assembly <NUM> with the largest thickness is within the proper range, while a pressure borne by a remaining circuit board assembly <NUM> is less than a required pressure. The pressure borne by the remaining circuit board assembly <NUM> may be made within the proper range by raising the height of the workbench <NUM> on which the remaining circuit board assembly <NUM> is located.

In another implementation, alternatively, the pressing plate assembly <NUM> may be a fixed pressing plate assembly <NUM>, or the pressing plate assembly <NUM> may be a liftable pressing plate assembly <NUM> with a fixed location. The circuit board assemblies <NUM> can be respectively pressed between the workbenches <NUM> and the pressing plate assembly <NUM> by raising the heights of the workbenches <NUM> of the adjustable bearing seats 13a.

As shown in <FIG>, the support frame <NUM> of the adjustable bearing seat 13a includes at least one support column <NUM>. The support column <NUM> is supported on the base plate <NUM>. One end of the support column <NUM> is mounted on the base plate <NUM>, while the workbench <NUM> is mounted on the other end of the support column <NUM>. In this embodiment, the end of the support column <NUM> that is mounted on the base plate <NUM> is defined as a bottom end of the support column <NUM>, and the end of the support column <NUM> that is connected to the workbench <NUM> is defined as a top end of the support column <NUM>. For example, the support column <NUM> may be vertically supported on the base plate <NUM>, and an axial direction of the support column <NUM> is perpendicular to a plate surface direction of the base plate <NUM>.

To improve stability of the workbench <NUM>, at least two support columns <NUM> may be provided between the workbench <NUM> and the base plate <NUM>. For example, a cross-sectional shape of the workbench <NUM> is approximately rectangular. The support frame <NUM> may include four support columns <NUM>, and the support columns <NUM> may be respectively provided near four corners of the workbench <NUM>. Alternatively, the cross-sectional shape of the workbench <NUM> may be approximately triangular, pentagonal, hexagonal, octagonal, or the like. The support frame <NUM> supported between the workbench <NUM> and the base plate <NUM> may include three, five, six, eight, or another quantity of support columns <NUM>. The support columns <NUM> may be spaced and provided close to an edge of the workbench <NUM>.

To implement adjustment of the height of the workbench <NUM> by the support columns <NUM> of the adjustable bearing seat 13a, as shown in <FIG>, in an implementation, the workbench <NUM> of the adjustable bearing seat 13a may be fixedly connected to the top end of the support column <NUM>, and a height of the support column <NUM> is adjustable. For example, the support column <NUM> is a telescopic support column <NUM>, and the height of the workbench <NUM> of the adjustable bearing seat 13a may be changed by adjusting an extension height of the support column <NUM>.

For example, the support column <NUM> may be a hydraulic rod. The support column <NUM> includes a rod sleeve and a movable piston rod inserted within the rod sleeve, and the workbench <NUM> may be fixedly connected to a top end of the piston rod. By controlling a volume and a pressure of hydraulic oil entering the rod sleeve, the piston rod is enabled to move along an axial direction of the rod sleeve, and the piston rod moves to drive the workbench <NUM> to rise or fall. Alternatively, the support column <NUM> may be another type of telescopic structure.

When the support column <NUM> is a telescopic support column <NUM>, in some implementations, a spacing between the workbench <NUM> and the base plate <NUM> may alternatively be adjusted in an electromagnetic driving manner. For example, one of the workbench <NUM> and the base plate <NUM> is provided with a magnetic member (not shown in the figure), while the other is provided with a drive coil (not shown in the figure). A magnetic force between the magnetic member and the drive coil is changed by adjusting a size of a current flowing to the drive coil, so that the workbench <NUM> is driven to move by the magnetic force. For example, the workbench <NUM> is a magnetic member, and a drive coil may be provided in a part of the base plate <NUM> that is opposite to the workbench <NUM>. When a magnetic force between the workbench <NUM> and the base plate <NUM> changes, the magnetic force drives the workbench <NUM> to rise or fall. The workbench <NUM> generates an acting force on the support column <NUM>, so that the support column <NUM> extends or contracts.

Except the case in which the support column <NUM> is a telescopic support column <NUM>, the workbench <NUM> is fixed relative to the support column <NUM>, and the support column <NUM> extends or contracts to drive the workbench <NUM> to move, in another implementation, the height of the support column <NUM> may be fixed, while the workbench <NUM> can move relative to the support column <NUM>, and the workbench <NUM> may be fixed at different parts of the support column <NUM>. The height of the workbench <NUM> relative to the base plate <NUM> is adjusted by moving the workbench <NUM> along the axial direction of the support column <NUM> and fixing the workbench <NUM> at different parts of the support column <NUM> along the axial direction.

<FIG> is a schematic diagram of a structure of another soldering apparatus according to Embodiment <NUM>, which is not covered by claim <NUM> of this application. As shown in <FIG>, as a specific implementation, the support column <NUM> of the adjustable bearing seat 13a may be inserted into the workbench <NUM> (not shown in the figure). In addition, a telescopic elastic part <NUM> is sleeved outside the support column <NUM>. Both ends of the elastic part <NUM> respectively abut against the workbench <NUM> and the base plate <NUM>. The workbench <NUM> is supported on the elastic part <NUM>. The height of the workbench <NUM> is adjusted by adjusting an expansion amount of the elastic part <NUM>, so that the workbench <NUM> is located at different parts of the support column <NUM>. For example, the support column <NUM> is a screw rod, and the elastic part <NUM> is a spring sleeved outside the screw rod. The screw rod is inserted into the workbench <NUM>, and both ends of the spring respectively abut between the base plate <NUM> and the workbench <NUM>. The height of the workbench <NUM> is adjusted by adjusting an expansion amount of the spring.

It can be understood that, the screw rod inserted into the workbench <NUM> can guide the movement of the workbench <NUM>, and the screw rod can support and limit a spring with weak rigidity. This can improve strength of the spring, improve stability of the spring in an extension and contraction process, limit telescopic movement of the spring along an axial direction of the screw rod, and ensure accuracy of the movement of the workbench <NUM> driven by the spring.

In a process of adjusting the height of the workbench <NUM> to a suitable location, the elastic part <NUM> may always be in a compressed state. An elastic force generated when the elastic part <NUM> is compressed applies an upward support force to the workbench <NUM>, so that a pressure between the workbench <NUM> and the pressing plate assembly <NUM> can be increased to ensure that the workbench <NUM> and the pressing plate assembly <NUM> are tightly pressed on the circuit board assembly <NUM>. Alternatively, the elastic part <NUM> may be switched between a compressed state and an extending state. When the workbench <NUM> is moved in place while the elastic part <NUM> is in the extending state, a limiting structure may be provided on the support column <NUM> to ensure the stability of the workbench <NUM>.

In addition, the expansion amount of the elastic part <NUM> sleeved outside the support column <NUM> may alternatively be adjusted in the electromagnetic driving manner described above. Still using the example in which the workbench <NUM> is a magnetic member and a drive coil is provided in the base plate <NUM>, a magnetic force between the magnetic member and the drive coil is changed to drive the workbench <NUM> to move relative to the base plate <NUM>, so that the workbench <NUM> moves to drive the elastic part <NUM> to extend or contract.

Still referring to <FIG>, a pressure sensor <NUM> is provided inside the workbench <NUM> of each adjustable bearing seat 13a. The pressure sensor <NUM> detects a value of the pressure borne by the circuit board assembly <NUM> on the workbench <NUM>. In this way, before soldering, the height of the workbench <NUM> of the adjustable bearing seat 13a is adjusted to control the pressure borne by the circuit board assembly <NUM> within the proper range. For example, a pressure range required for soldering the circuit board assembly <NUM> is <NUM>-<NUM> N. When the pressure sensor <NUM> detects that the pressure borne by the circuit board assembly <NUM> is within <NUM>-<NUM> N, it indicates that the pressure borne by the circuit board assembly <NUM> is within a proper range, and the workbench <NUM> of the adjustable bearing seat 13a can be fixed at a current height location.

After the pressing plate assembly <NUM> is moved downward and pressed on the circuit board assembly <NUM>, or after the height of the workbench <NUM> of the adjustable bearing seat 13a is increased, if the pressure sensor <NUM> detects that the pressure borne by the circuit board assembly <NUM> is less than a pressure required for soldering, for example, the pressure on the circuit board assembly <NUM> that is detected by the pressure sensor <NUM> is less than <NUM> N, the workbench <NUM> is still moved upward slowly, until a pressure detected by the pressure sensor <NUM> is within the proper range required for soldering.

For example, the pressure sensor <NUM> may be close to a work surface of the workbench <NUM>, to be specific, the pressure sensor <NUM> is provided close to a surface of the workbench <NUM> for placing the circuit board assembly <NUM>, to improve precision of detecting, by the pressure sensor <NUM>, the pressure borne by the circuit board assembly <NUM>. For example, the pressure sensor <NUM> may be attached to an inner wall surface of the workbench <NUM> that corresponds to its work surface.

In this embodiment, the circuit board assembly <NUM> may be heated by using energy generated by laser light emitted by a laser <NUM>. Specifically, still referring to <FIG>, the soldering apparatus <NUM> includes the laser <NUM>. The laser <NUM> is provided above the pressing plate assembly <NUM>, that is, the laser <NUM> is provided on a side of the pressing plate assembly <NUM> that faces away from the base plate <NUM>. The laser light emitted by the laser <NUM> penetrates the pressing plate assembly <NUM> and is irradiated onto the workbench <NUM>. The circuit board assembly <NUM> located on the workbench <NUM> is heated by the energy of the laser light, so that the solder paste <NUM> on the pads <NUM> of the PCB <NUM> is melted, thereby implementing the soldered connection between the PCB <NUM> and the FPC <NUM>.

The laser <NUM> may include a laser body <NUM> and laser glass <NUM>. The laser body <NUM> is configured to emit laser light, and the laser glass <NUM> is provided on an out-light side of the laser body <NUM>. The laser glass <NUM> is configured to protect purity of the laser body <NUM>, to avoiding impurities from entering the laser body <NUM>. The laser light emitted by the laser body <NUM> penetrates the laser glass <NUM> and the pressing plate assembly <NUM> and is irradiated onto the circuit board assembly <NUM> on the workbench <NUM>. For example, the laser glass <NUM> may be attached to a side surface of the pressing plate assembly <NUM> that faces away from the base plate <NUM>.

As shown in <FIG>, for example, the first circuit board 21a placed on the workbench <NUM> is the PCB <NUM>, and the second circuit board 21b stacked on the first circuit board 21a is the FPC <NUM>. The laser light emitted by the laser <NUM> penetrates the laser glass <NUM> and the pressing plate assembly <NUM> and is irradiated onto a surface of the FPC <NUM>, and the FPC <NUM> is heated by the energy of the laser light and experiences a temperature rise. The temperature rise of the FPC <NUM> enables the heat to be transferred to the solder paste <NUM> on the pads <NUM> of the PCB <NUM>, so that the solder paste <NUM> is melted. The molten solder paste <NUM> is squeezed and overflows upward to a surface of the FPC <NUM> that faces away from the PCB <NUM>, thereby implementing the soldered connection between the FPC <NUM> and the PCB <NUM>.

For example, the first circuit board 21a placed on the workbench <NUM> is the FPC <NUM>, and the second circuit board 21b stacked on the first circuit board 21a is the PCB <NUM>. The laser light emitted by the laser <NUM> is irradiated onto a surface of the PCB <NUM>, and the PCB <NUM> is heated by the energy of the laser light and experiences a temperature rise. The temperature rise of the PCB <NUM> enables the heat to be transferred to the solder paste <NUM> on the pads <NUM> on the other surface of the PCB <NUM>, so that the solder paste <NUM> is melted. The molten solder paste <NUM> is squeezed and overflows downward to a surface of the FPC <NUM> that faces away from the PCB <NUM>, thereby implementing the soldered connection between the FPC <NUM> and the PCB <NUM>.

Still referring to <FIG>, in this embodiment, the pressing plate assembly <NUM> may include a substrate <NUM>. The substrate <NUM> is provided opposite to the base plate <NUM>, and the substrate <NUM> can cover an entire region occupied by all the bearing seats <NUM> provided on the base plate <NUM>, that is, projections of the workbenches <NUM> of all the bearing seats <NUM> on the substrate <NUM> each are located within a coverage area of the substrate <NUM>. Each circuit board assembly <NUM> is pressed between the substrate <NUM> and the workbench <NUM> of each bearing seat <NUM>.

For example, the substrate <NUM> may be a glass substrate, and the glass substrate has a high light transmittance. For example, the glass substrate has a light transmittance of more than <NUM>% for laser light, and the laser light penetrates the glass substrate and is irradiated onto each workbench <NUM>. Alternatively, the substrate <NUM> may be a plastic substrate. The plastic substrate needs to have a high laser light transmittance. In addition, the plastic substrate has high strength and good thermal stability, and is capable of meeting a soldering pressure requirement of the circuit board assembly <NUM>. The energy of the laser light does not affect the stability of the plastic substrate.

In addition, the pressing plate assembly <NUM> may further include at least two separate plates <NUM>. Both separate plates <NUM> are provided on a side surface of the substrate <NUM> that faces the base plate <NUM>, for example, both separate plates <NUM> are attached to a surface of the substrate <NUM>. The separate plates <NUM> are in a one-to-one correspondence with the workbenches <NUM> of the bearing seats <NUM>, and a workspace is formed between the separate plates <NUM> and the workbenches <NUM>. During soldering of the circuit board assemblies <NUM>, the circuit board assemblies <NUM> are pressed between the separate plates <NUM> and the workbenches <NUM>.

By stacking the separate plates <NUM> on the surface of the substrate <NUM> that faces the base plate <NUM>, strength of the pressing plate assembly <NUM> can be increased, a pressure bearing capability of the pressing plate assembly <NUM> can be improved, and reliability of the soldering apparatus <NUM> can be improved. In addition, as shown in <FIG>, there is a spacing between adjacent separate plates <NUM>. The spacing makes a particular avoidance space exist between adjacent bearing seats <NUM>. The avoidance space is configured to avoid another structure on the circuit board assembly <NUM>. For example, except the region that requires soldered connection, the components <NUM> are further arranged in another region on the PCB <NUM> or the FPC <NUM>. By adjusting orientations of the PCB <NUM> and the FPC <NUM>, the components <NUM> on the PCB <NUM> or the FPC <NUM> are located in the avoidance space between adjacent separate plates <NUM>. Alternatively, for a case in which a connector is connected to an end of the FPC <NUM>, the end of the FPC <NUM> that is provided with the connector may be located in the avoidance space.

On the basis of Embodiment <NUM>, this embodiment provides a soldering apparatus <NUM>. <FIG> is a schematic diagram of a structure of a third soldering apparatus according to Embodiment <NUM>, which is not covered by claim <NUM> of this application. As shown in <FIG>, different from the soldering apparatus <NUM> in Embodiment <NUM>, the soldering apparatus <NUM> in this embodiment includes one fixed bearing seat 13b in the bearing seats <NUM>, while a remaining bearing seat <NUM> is an adjustable bearing seat 13a. For example, the soldering apparatus <NUM> is provided with two bearing seats <NUM>, where one bearing seat <NUM> is a fixed bearing seat 13b, and the other bearing seat <NUM> is an adjustable bearing seat 13a.

As shown in <FIG>, a spacing between the workbench <NUM> of the fixed bearing seat 13b and the base plate <NUM> is fixed. For example, the support frame <NUM> of the fixed bearing seat 13b is a support column <NUM>. The support column <NUM> of the fixed bearing seat 13b may be a support column <NUM> whose length is unadjustable, and the workbench <NUM> may be fixedly mounted at a top end of the support column <NUM>.

It should be noted that, since a height of the workbench <NUM> of the fixed bearing seat 13b is unadjustable, the pressing plate assembly <NUM> of the soldering apparatus <NUM> needs to be provided as a liftable pressing plate assembly <NUM>. Before soldering of the circuit board assembly <NUM>, a large space is reserved between the pressing plate assembly <NUM> and the workbench <NUM> of the fixed bearing seat 13b. After the circuit board assembly <NUM> is placed, the pressing plate assembly <NUM> is moved downward, so that the pressing plate assembly <NUM> is pressed on a surface of the circuit board assembly <NUM> on the workbench <NUM>.

When a plurality of circuit board assemblies <NUM> are simultaneously soldered, a height of the workbench <NUM> of the adjustable bearing seat 13a can be adjusted by using the fixed bearing seat 13b as reference. For example, an initial height of the workbench <NUM> of the adjustable bearing seat 13a may be less than the height of the workbench <NUM> of the fixed bearing seat 13b. In other words, before soldering operations are performed, a spacing between the workbench <NUM> of the adjustable bearing seat 13a and the base plate <NUM> is less than the spacing between the workbench <NUM> of the fixed bearing seat 13b and the base plate <NUM>.

In this case, during soldering, the pressing plate assembly <NUM> is moved downward, and the pressing plate assembly <NUM> is pressed on the circuit board assembly <NUM> on the workbench <NUM> of the fixed bearing seat 13b, so that a location of the pressing plate assembly <NUM> is fixed after a pressure on the workbench <NUM> of the fixed bearing seat 13b is adjusted within a proper range. Then, the height of the workbench <NUM> of each adjustable bearing seat 13a is increased, so that the circuit board assembly <NUM> on the workbench <NUM> of the adjustable bearing seat 13a is pressed on the workbench <NUM> and the pressing plate assembly <NUM>. When a pressure on the workbench <NUM> of the adjustable bearing seat 13a is within the proper range, a location of the workbench <NUM> of the adjustable bearing seat 13a is fixed.

With the fixed bearing seat 13b provided, when only one circuit board assembly <NUM> is soldered at a single time, the circuit board assembly <NUM> may be placed on the workbench <NUM> of the fixed bearing seat 13b, and only a height of the liftable pressing plate assembly <NUM> needs to be adjusted before soldering. Operations are simple and efficiency is high. In addition, the soldering apparatus <NUM> in this embodiment may be reconstructed on the basis that the original soldering apparatus <NUM> includes one fixed bearing seat 13b, and the adjustable bearing seat 13a may be added to the base plate <NUM>. This facilitates implementation, without scraping the original soldering apparatus <NUM>.

<FIG> shows the case in which the support frame <NUM> of the fixed bearing seat 13b of the soldering apparatus <NUM> is a support column <NUM>. It can be understood that, the support frame <NUM> of the fixed bearing seat 13b may be another structure, for example, the support frame <NUM> of the fixed bearing seat 13b is a frame structure. In addition, the support frame <NUM> of the adjustable bearing seat 13a of the soldering apparatus <NUM> shown in <FIG> is a telescopic support column <NUM>. In another implementation, the support frame <NUM> of the adjustable bearing seat 13a may alternatively be the structure shown in <FIG> in which the elastic part <NUM> is sleeved outside the support column <NUM>, or the support frame <NUM> of the adjustable bearing seat 13a may be another structural form.

Still referring to <FIG>, for a case with the fixed bearing seat 13b provided, one pressure sensor <NUM> may be provided on the pressing plate assembly <NUM>. For example, one pressure sensor <NUM> may be provided on a surface of the substrate <NUM> of the pressing plate assembly <NUM> that faces away from the base plate <NUM>. One pressure sensor <NUM> is provided in the workbench <NUM> of each adjustable bearing seat 13a.

When the pressing plate assembly <NUM> is pressed on the workbench <NUM> of each bearing seat <NUM>, the pressure sensor <NUM> provided on the pressing plate assembly <NUM> is used to detect an average pressure on each workbench <NUM>, and a location of the pressing plate assembly <NUM> is determined by using a pressure value detected by the pressure sensor <NUM> as reference. Then, the height of the workbench <NUM> of each adjustable bearing seat 13a is adjusted based on the pressure value detected by the pressure sensor <NUM> provided in the workbench <NUM> of each adjustable bearing seat 13a, so that the pressure borne by the workbench <NUM> of each adjustable bearing seat 13a reaches the proper range.

<FIG> is a schematic diagram of a structure of a fourth soldering apparatus according to Embodiment <NUM>, which is not covered by claim <NUM> of this application. As shown in <FIG>, in another implementation, the pressure sensor <NUM> is not provided on the pressing plate assembly <NUM>, but is provided in the workbench <NUM> of the fixed bearing seat 13b. A pressure value detected by the pressure sensor <NUM> in the fixed bearing seat 13b is used as reference for adjusting a height of the pressing plate assembly <NUM>. After the pressing plate assembly <NUM> is moved in place, the height of the workbench <NUM> of each adjustable bearing seat 13a is adjusted based on a pressure value detected by the pressure sensor <NUM> in the workbench <NUM> of each adjustable bearing seat 13a.

With the pressure sensor <NUM> provided in the workbench <NUM> of the fixed bearing seat 13b, the pressure value detected by the pressure sensor <NUM> in the workbench <NUM> of the fixed bearing seat 13b is closer to a pressure borne by the workbench <NUM> of the fixed bearing seat 13b. Therefore, positioning precision of the pressing plate assembly <NUM> is higher, and the height of the workbench <NUM> of each adjustable bearing seat 13a can be adjusted more precisely by using the pressure value as reference. Further, soldering performance of the circuit board assembly <NUM> on the workbench <NUM> of each adjustable bearing seat 13a can be improved.

On the basis of Embodiment <NUM> and Embodiment <NUM>, this embodiment improves a heating structure of the soldering apparatus <NUM> in Embodiment <NUM> and Embodiment <NUM>, to improve efficiency of heating the circuit board assembly <NUM> by the soldering apparatus <NUM> and increase a soldering speed of the circuit board assembly <NUM>.

<FIG> is a schematic diagram of a structure of a fifth soldering apparatus according to Embodiment <NUM>, which is not covered by claim <NUM> of this application. As shown in <FIG>, as an implementation, at least two lasers <NUM> may be provided in the soldering apparatus <NUM>. Each of the lasers <NUM> is provided on the side of the pressing plate assembly <NUM> that faces away from the base plate <NUM>. For example, each of the lasers <NUM> is provided on a side surface of the substrate <NUM> of the pressing plate assembly <NUM> that faces away from the base plate <NUM>. The lasers <NUM> are in a one-to-one correspondence with the bearing seats <NUM>. An out-light surface of each laser <NUM> corresponds to each workbench <NUM>. For example, the laser glass <NUM> of each laser <NUM> directly faces the workbench <NUM>.

With the plurality of lasers <NUM> in a one-to-one correspondence with the workbenches <NUM> of the bearing seats <NUM> provided above the pressing plate assembly <NUM>, the out-light surface of each laser <NUM> is aligned with each workbench <NUM>, and laser light emitted by each laser <NUM> is concentrated and irradiated onto the workbench <NUM>, to heat each circuit board assembly <NUM> on the workbench <NUM> in a centralized manner. This can improve efficiency of heating the circuit board assembly <NUM>, increase a soldering speed of the circuit board assembly <NUM>, and improve soldering efficiency of the soldering apparatus <NUM>.

In practical application, when the PCB <NUM> is manufactured and processed, a PCB <NUM> with a large area is usually formed first, and then the large PCB <NUM> is cut into a plurality of small PCBs <NUM> that meet requirements. Therefore, in the plurality of lasers <NUM> provided in the soldering apparatus <NUM>, some of the lasers <NUM> may be used to implement a heating function on the circuit board assembly <NUM> on the workbench <NUM> and the other of the lasers <NUM> may be used to implement a cutting function on the PCB <NUM>.

<FIG> is a schematic diagram of a structure of a sixth soldering apparatus according to the Embodiment <NUM>. <FIG> depicts an embodiment of the invention. As shown in <FIG>, specifically, the plurality of lasers <NUM> may include a first laser 15a and a second laser 15b.

The first laser 15a may be the foregoing laser <NUM> provided on the side of the pressing plate assembly <NUM> that faces away from the base plate <NUM>. The first laser 15a is configured to implement the heating function on the circuit board assembly <NUM> on the workbench <NUM>. As shown in <FIG>, the pressing plate assembly <NUM> is provided with one first laser 15a. The first laser 15a covers the workbenches <NUM> of all the bearing seats <NUM>, and laser light emitted by the first laser 15a can be irradiated onto the circuit board assemblies <NUM> on the workbenches <NUM>. In another example, the pressing plate assembly <NUM> may alternatively be provided with a plurality of first lasers 15a, and each first laser 15a corresponds to the workbench <NUM> of each bearing seat <NUM>.

The second laser 15b may be provided on a side of the pressing plate assembly <NUM> that faces the base plate <NUM>, and the second laser 15b is located in a gap between adjacent bearing seats <NUM>. For example, the second laser 15b is provided on the side surface of the substrate <NUM> that faces the base plate <NUM>, and the second laser 15b is located in a gap between adjacent separate plates <NUM>. Laser light emitted by the second laser 15b is irradiated onto a region of the PCB <NUM> that extends out of the workbench <NUM>, so as to cut the PCB <NUM> from a corresponding part. For this, when the PCB <NUM> is placed before soldering, a region to be cut on the PCB <NUM> may be correspondingly placed in the gap between adjacent bearing seats <NUM>, so that the laser light emitted by the second laser 15b is directly irradiated onto the region to be cut on the PCB <NUM>, to perform laser cutting on the PCB <NUM>.

For example, the PCB <NUM> to be cut may be the foregoing integral PCB <NUM> covering a plurality of workbenches <NUM>, and the FPCs <NUM> on the workbenches <NUM> are soldered to different regions of the PCB <NUM>. The second laser 15b is configured to cut a region on the PCB <NUM> that corresponds to a gap between adjacent workbenches <NUM>. Alternatively, the PCB <NUM> to be cut is the PCB <NUM> corresponding to each workbench <NUM>, and the second laser 15b is configured to cut a region of the PCB <NUM> that extends out of the workbench <NUM>.

It can be understood that, a plurality of second lasers 15b may be spaced on the side surface of the substrate <NUM> that faces the base plate <NUM>. Each of the second lasers 15b is provided in a gap between adjacent separate plates <NUM>. The second laser 15b may be provided between the separate plates <NUM> of all adjacent bearing seats <NUM>, or the second laser 15b may be provided between the separate plates <NUM> of some adjacent bearing seats <NUM>.

On the basis of Embodiment <NUM> and Embodiment <NUM>, this embodiment provides a soldering apparatus <NUM> to improve efficiency of heating the circuit board assembly <NUM> by the soldering apparatus <NUM> and increase a soldering speed of the circuit board assembly <NUM>. In the soldering apparatus <NUM> provided in this embodiment, a heating structure is further provided corresponding to each bearing seat <NUM>, so that each bearing seat <NUM> is centrally heated by using the heating structure on the bearing seat <NUM>, thereby improving the heating efficiency of the circuit board assembly <NUM> on the bearing seat <NUM>.

<FIG> is a schematic diagram of a structure of a seventh soldering apparatus according to Embodiment <NUM>, which is not covered by claim <NUM> of this application. As shown in <FIG>, on the basis that the circuit board assembly <NUM> on the workbench <NUM> of each bearing seat <NUM> is heated through the pressing plate assembly <NUM> by the laser <NUM> on the pressing plate assembly <NUM>, the laser <NUM> may be further provided corresponding to each bearing seat <NUM>, so as to increase the heating speed of the circuit board assembly <NUM> on the workbench <NUM> of the bearing seat <NUM> and increase the soldering speed of the circuit board assembly <NUM>.

Specifically, a third laser 15c may be provided on each bearing seat <NUM>, and the third laser 15c is located between the workbench <NUM> and the base plate <NUM>. For example, the third laser 15c may be provided on a side surface of the workbench <NUM> that faces the base plate <NUM>. The workbench <NUM> may be a workbench <NUM> with good light transmission, and a material for forming the workbench <NUM> may be, for example, glass or plastic with good light transmission and good thermal stability. Laser light emitted by the third laser 15c penetrates the workbench <NUM> and is irradiated onto the circuit board assembly <NUM> on the workbench <NUM>, to heat the circuit board assembly <NUM>.

As shown in <FIG>, the laser <NUM> located above the pressing plate assembly <NUM> heats one side surface of the circuit board assembly <NUM>, and the third laser 15c located below the workbench <NUM> heats the other side surface of the circuit board assembly <NUM>. By simultaneously heating both sides of the circuit board assembly <NUM>, the efficiency of heating the circuit board assembly <NUM> by the soldering apparatus <NUM> is improved, the soldering speed of the circuit board assembly <NUM> is increased, and the soldering efficiency of the soldering apparatus <NUM> is improved.

<FIG> is a schematic diagram of a structure of an eighth soldering apparatus according to the Embodiment <NUM>, which is not covered by claim <NUM> of this application. As shown in <FIG>, a heater <NUM> may be further provided in each workbench <NUM> in addition to providing the laser <NUM> below the workbench <NUM> of each bearing seat <NUM> and heating the circuit board assembly <NUM> on the workbench <NUM> by using the energy of the laser light. The heater <NUM> may be, for example, an electric heater, and heat generated by the heater <NUM> may be transferred to the work surface of the workbench <NUM>, so as to heat the circuit board assembly <NUM> on the workbench <NUM>. The heater <NUM> in each workbench <NUM> cooperates with the laser <NUM> on the pressing plate assembly <NUM> to simultaneously heat both sides of the circuit board assembly <NUM>. This increases heating efficiency and a soldering speed of the circuit board assembly <NUM> and improves soldering efficiency of the soldering apparatus <NUM>.

In addition, it can be understood that, the soldering apparatus <NUM> provided in this embodiment may be further provided with the second laser 15b for cutting the PCB <NUM> in the foregoing Embodiment <NUM>, and details are not described herein again.

On the basis of Embodiment <NUM> and Embodiment <NUM>, this embodiment provides a soldering method for the circuit board assembly <NUM> (referred to as soldering method for short below). The soldering method is applied to the soldering apparatus <NUM> in Embodiment <NUM> or Embodiment <NUM>.

<FIG> is a schematic flowchart of a circuit board assembly soldering method according to Embodiment <NUM> of this application. As shown in <FIG>, the soldering method includes the following steps.

S100: Place first circuit boards on workbenches of bearing seats in a one-to-one correspondence, where to-be-soldered surfaces of the first circuit boards face a pressing plate assembly.

With reference to <FIG>, the first circuit boards 21a are first placed on the workbenches <NUM> of the bearing seats <NUM>, so that the to-be-soldered surfaces of the first circuit boards 21a face upward, that is, the to-be-soldered surfaces of the first circuit boards 21a face the pressing plate assembly <NUM> above the workbenches <NUM>.

For example, the first circuit boards 21a are PCBs <NUM>. The PCBs <NUM> are first placed on the workbenches <NUM>, and side surfaces of the PCBs <NUM> that are each provided with the pads <NUM> face upward. It can be understood that, the solder paste <NUM> may be pre-printed on the pads <NUM> for each PCB <NUM>. The workbench <NUM> is generally provided with a positioning region. After the PCB <NUM> is placed in the positioning region on the workbench <NUM>, an additional layer of solder flux may be coated on the solder paste <NUM> of the PCB <NUM>.

Alternatively, the first circuit boards 21a may be FPCs <NUM>. The FPCs <NUM> are first placed on the workbenches <NUM>, and side surfaces of the FPCs <NUM> that are each provided with the solder pins <NUM> face upward.

S200: Stack second circuit boards on the first circuit boards on the workbenches in a one-to-one correspondence, where to-be-soldered surfaces of the second circuit boards face the first circuit boards.

After the first circuit boards 21a are properly placed, the second circuit boards 21b are stacked on the first circuit boards 21a, and to-be-soldered surfaces of the second circuit boards 21b face the first circuit boards 21a.

For example, the first circuit boards 21a are PCBs <NUM> and the second circuit board 21b are FPCs <NUM>. After the PCBs <NUM> are properly placed on the workbenches <NUM>, the FPCs <NUM> are placed on the PCBs <NUM>. A region on the FPC <NUM> that is centrally provided with the solder pins <NUM> is located corresponding to the soldering region 211a on the PCB <NUM>. For example, the first circuit boards 21a are FPCs <NUM> and the second circuit board 21b are PCBs <NUM>. After the FPCs <NUM> are properly placed on the workbenches <NUM>, the PCBs <NUM> are stacked on the FPCs <NUM>, so that the soldering region 211a of each PCB <NUM> corresponds to a region on the FPC <NUM> that is provided with the solder pins <NUM>.

Further, it should be noted that, after the circuit board assembly <NUM> is properly placed and before the circuit board assembly <NUM> is soldered, it is necessary to adjust the height of the workbench <NUM> of each adjustable bearing seat 13a. Therefore, for a case in which the PCB <NUM> is the foregoing integral PCB <NUM>, the PCB <NUM> covers the workbenches <NUM>, and the FPCs <NUM> are soldered to different regions on the PCB <NUM>, the first circuit boards 21a may be the FPCs <NUM> and the second circuit board 21b may be the PCB <NUM>. The FPCs <NUM> may be first placed on the workbenches <NUM>, and then the integral PCB <NUM> may be stacked on the FPCs <NUM>, to avoid damage to the integral PCB <NUM> when the workbench <NUM> of each adjustable bearing seat 13a is adjusted.

S300: Press the pressing plate assembly on the second circuit boards on the workbenches.

After the circuit board assembly <NUM> is properly placed, a spacing between the workbench <NUM> and the pressing plate assembly <NUM> is adjusted, so that the pressing plate assembly <NUM> is pressed on the second circuit board 21b on the workbench <NUM>. For example, the pressing plate assembly <NUM> is pressed on each FPC <NUM> or each PCB <NUM>, or the pressing plate assembly <NUM> is pressed on the integral PCB <NUM>.

In this case, the pressing plate assembly <NUM> can play only a pre-pressing function. The height of the pressing plate assembly <NUM> may be fixed, and the pressure borne by the circuit board assembly <NUM> on each workbench <NUM> may be less than a pressure range required for soldering. Alternatively, the pressure borne by the circuit board assembly <NUM> on only one or some of the workbenches <NUM> may be within the pressure range required for soldering, while the pressure borne by the circuit board assembly <NUM> on a remaining workbench <NUM> may be less than the pressure range required for soldering.

For example, a pressure required for soldering is <NUM>-<NUM> N. In this case, the pressure borne by the circuit board assembly <NUM> on each workbench <NUM> may be less than <NUM> N, or the pressure borne by the circuit board assembly <NUM> on only one or some of the workbenches <NUM> may be within the range of <NUM>-<NUM> N, while the pressure borne by the circuit board assembly <NUM> on a remaining workbench <NUM> may be less than <NUM> N.

S400: Adjust a spacing between a workbench of each adjustable bearing seat and a base plate, so that a bearing pressure on each workbench is within a preset pressure range.

After the pressing plate assembly <NUM> is properly positioned, the height of the workbench <NUM> of each adjustable bearing seat 13a is adjusted based on the pressures on the workbenches <NUM> of different adjustable bearing seats 13a, so that the bearing pressure on the workbench <NUM> of each adjustable bearing seat 13a is within the preset pressure range. The preset pressure range is a pressure range required for soldering, for example, the preset pressure range is <NUM>-<NUM> N.

It should be noted that, there is no need to make the bearing pressures on the workbenches <NUM> of all the bearing seats <NUM> totally the same, provided that the bearing pressure on the workbench <NUM> of each bearing seat <NUM> is within the preset pressure range and soldering requirements of the circuit board assembly <NUM> are met.

Specifically, with reference to <FIG>, for example, all the bearing seats <NUM> are adjustable bearing seats 13a. The pressing plate assembly <NUM> is pressed on the second circuit board 21b on each workbench <NUM>. After the height of the pressing plate assembly <NUM> is fixed, the bearing pressure on one or some of the workbenches <NUM> is made within the preset pressure range, while the bearing pressure on a remaining workbench <NUM> is made less than a minimum pressure value in the preset pressure range. Alternatively, the bearing pressures on all the workbenches are less than the minimum pressure value within the preset pressure range.

Then, the height of the workbench <NUM> whose bearing pressure is less than the minimum pressure value within the preset pressure range is increased. In other words, the spacing between the workbench <NUM> and the base plate <NUM> is increased, and the spacing between the workbench <NUM> and the pressing plate assembly <NUM> is reduced, to increase the bearing pressure on the workbench <NUM>. In this way, after the bearing pressure on the workbench <NUM> reaches the preset pressure range, the height of the workbench <NUM> is fixed.

When the pressing plate assembly <NUM> is properly positioned, before the height of the workbench <NUM> of each adjustable bearing seat 13a is adjusted, the bearing pressure on the workbench <NUM> of each adjustable bearing seat 13a is controlled to not exceed a maximum pressure value within the preset pressure range, to avoid damage caused by an excessively large pressure to the circuit board assembly <NUM>.

Since all the bearing seats <NUM> are adjustable bearing seats 13a and the height of the workbench <NUM> of each bearing seat <NUM> is adjustable, the pressing plate assembly <NUM> may be provided as a pressing plate assembly <NUM> with a fixed height, or the pressing plate assembly <NUM> may be a pressing plate assembly <NUM> with a variable height. This is not limited in this embodiment.

For example, the bearing pressure on the workbench <NUM> of each adjustable bearing seat 13a may be detected in real time by using the pressure sensor <NUM> in the workbench <NUM> of each adjustable bearing seat 13a.

With reference to <FIG>, for example, the bearing seats <NUM> include one fixed bearing seat 13b, the height of the workbench <NUM> of the fixed bearing seat 13b is unadjustable, and a remaining bearing seat <NUM> is an adjustable bearing seat 13a. The pressing plate assembly <NUM> may be a pressing plate assembly <NUM> with a variable height. Before soldering operations are performed, the height of the workbench <NUM> of each adjustable bearing seat 13a may be less than the height of the workbench <NUM> of the fixed bearing seat 13b. In other words, a spacing between the workbench <NUM> of each adjustable bearing seat 13a and the base plate <NUM> is less than the spacing between the workbench <NUM> of the fixed bearing seat 13b and the base plate <NUM>.

After the pressing plate assembly <NUM> is pre-pressed on the second circuit board 21b on each workbench <NUM> and the height of the pressing plate assembly <NUM> is fixed, the bearing pressure on the workbench <NUM> of the fixed bearing seat 13b needs to be made within the preset pressure range, and the bearing pressure on the workbench <NUM> of each adjustable bearing seat 13a needs to be made less than the minimum value within the preset pressure range. This avoids an excessively large initial pressure on the workbench <NUM> of the adjustable bearing seat 13a from causing damage to the circuit board assembly <NUM> on the workbench <NUM> of the adjustable bearing seat 13a.

Then, the height of the workbench <NUM> of each adjustable bearing seat 13a is gradually increased, so that the bearing pressure on the workbench <NUM> of each adjustable bearing seat 13a is increased, until the bearing pressure on the workbench <NUM> of each adjustable bearing seat 13a is within the preset pressure range and the height of the workbench <NUM> of each adjustable bearing seat 13a is fixed.

For example, the bearing pressure on the workbench <NUM> of each adjustable bearing seat 13a may be detected in real time by using the pressure sensor <NUM> in the workbench <NUM> of each adjustable bearing seat 13a. When the height of the pressing plate assembly <NUM> is fixed, a pressure between the pressing plate assembly <NUM> and the workbench <NUM> of the fixed bearing seat 13b may be detected by using the pressure sensor <NUM> on the pressing plate assembly <NUM>, or the bearing pressure on the workbench <NUM> of the fixed bearing seat 13b may be detected in real time by using the pressure sensor <NUM> provided in the workbench <NUM> of the fixed bearing seat 13b.

S500: Connect the second circuit boards to the first circuit boards by soldering.

After the bearing pressure on the workbench <NUM> of each bearing seat <NUM> is adjusted to the preset pressure range, the soldering operations on the circuit board assembly <NUM> are started. The circuit board assembly <NUM> on the workbench <NUM> is heated by using the soldering apparatus <NUM>, so that the solder paste <NUM> on the pads <NUM> of the PCB <NUM> is melted. In addition, pressures applied by pressing plate assembly <NUM> and the workbench <NUM> squeeze the molten solder paste <NUM> and make the solder paste <NUM> overflow to a side surface of the FPC <NUM> that faces away from the PCB <NUM>, thereby implementing soldered connection between the PCB <NUM> and the FPC <NUM>.

In the description of the embodiments of this application, it should be noted that, the terms "mounting", "connection", and "connect" should be understood in a broad sense unless otherwise expressly stipulated and limited. For example, "connection" may be a fixed connection, an indirect connection through an intermediate medium, internal communication between two elements, or an interaction relationship between two elements. For a person of ordinary skill in the art, specific meanings of the foregoing terms in the embodiments of this application can be understood based on specific situations.

Claim 1:
A circuit board assembly soldering apparatus (<NUM>), comprising a base plate (<NUM>), a pressing plate assembly (<NUM>), at least two bearing seats (<NUM>, 13a, 13b) and at least two lasers (<NUM>, 15a, 15b, 15c), wherein the pressing plate assembly (<NUM>) is oppositely provided above the base plate (<NUM>), the at least two bearing seats (<NUM>, 13a, 13b) are mounted on the base plate (<NUM>), and the at least two bearing seats (<NUM>, 13a, 13b) are located between the pressing plate assembly (<NUM>) and the base plate (<NUM>); the at least two bearing seats (<NUM>, 13a, 13b) each comprise a workbench (<NUM>), the workbench (<NUM>) is located on a side of the bearing seat that faces the pressing plate assembly (<NUM>), the workbench (<NUM>) is provided with a positioning region, and the pressing plate assembly (<NUM>) is configured to be pressed on a circuit board assembly (<NUM>) placed in the positioning region on the workbench (<NUM>); and the circuit board assembly (<NUM>) comprises a first circuit board (21a) and a second circuit board (21b) that are stacked on the workbench (<NUM>), and the second circuit board (21b) is located on a side of the first circuit board (21a) that faces away from the workbench (<NUM>); wherein
the at least two bearing seats (<NUM>, 13a, 13b) comprise at least one adjustable bearing seat (13a), and a spacing between the workbench (<NUM>) of the adjustable bearing seat (13a) and the base plate (<NUM>) is adjustable;
the at least two lasers (<NUM>, 15a, 15b, 15c) comprise at least one first laser (<NUM>, 15a) and at least one second laser (15b);
the at least one first laser (<NUM>, 15a) is provided on a side of the pressing plate assembly (<NUM>) that faces away from the base plate (<NUM>), and laser light emitted by the at least one first laser (<NUM>, 15a) penetrates the pressing plate assembly (<NUM>) and is irradiated onto the circuit board assemblies (<NUM>) on the workbenches (<NUM>) to melt solder paste (<NUM>) on the circuit board assemblies (<NUM>); and
the at least one second laser (15b) is provided on a side of the pressing plate assembly (<NUM>) that faces the base plate (<NUM>), is located in a gap between adjacent bearing seats of the at least two bearing seats (<NUM>, 13a, 13b) and is configured to perform laser cutting on the first circuit board (21a).