WO2012146165A1

WO2012146165A1 - Fpc test line

Info

Publication number: WO2012146165A1
Application number: PCT/CN2012/074642
Authority: WO
Inventors: 张洋; 李博; 朱光华; 汪翠兰
Original assignee: 青岛海信移动通信技术股份有限公司
Priority date: 2011-04-29
Filing date: 2012-04-25
Publication date: 2012-11-01

Abstract

Disclosed in the invention is a flexible printed circuit (FPC) test line, which comprises a plurality of mainboard sockets for correspondingly plugging into connectors on the printer circuit board assembly (PCBA) of an electronic device and at least one component socket for correspondingly plugging into the connector on a component to be assembled. Once connected in parallel, the mainboard sockets are correspondingly connected with pins having the same interface definitions as the component socket. By arranging parallel connector sockets on the FPC test line of the invention, when one socket cannot be used due to heavy wear, the next socket can be used as a test connector, thus extending the service life of the FPC test line, reducing the manpower required for tooling maintenance and the work suspensions of a test station during tooling maintenance, and improving the efficiency with which a fully assembled device is tested. In addition, because of the extended single-line service life of the FPC test line, the procurement cost of the FPC test line is reduced substantially, and the cost of the PCBA per device is reduced, thus offering a price advantage.

Description

FPC test line technical field

The invention belongs to the technical field of circuit board testing, and in particular to an auxiliary connecting device used for simulating the function test of a complete machine.

Background technique

In the mobile phone production process, it is necessary to pass the RF and function indicators of the mobile phone PCBA (Pinter Ci rcui Board Assembly), which can be assembled into the assembly board. Assembly of parts. At this time, because the components to be assembled of the mobile phone are not mounted on the PCBA, the functional test of the PCBA needs to be made into a functional test tool, and the PCBA of the mobile phone passes through the probe of the clamp, the FPC test line and other auxiliary connecting devices and to be assembled. After the components are connected, the analog function test of the PCBA can be started.

FPC is short for Flexible Pr inted Ci rcui, which is a flexible printed circuit board. A male board 12 of a board-to-board connector and a female head 11 of a board-to-board connector are generally provided on the existing FPC test line 10, as shown in FIG. When using the FPC test line 10 to perform functional test on the PCBA 13 of the mobile phone, on the one hand, the male head 12 of the FPC test line 10 needs to be plugged and connected with the female connector of the board-to-board connector on the mobile phone PCBA 13, as shown in FIG. On the other hand, it is necessary to connect the female head 11 of the FPC test line 10 to the male connector of the board-to-board connector on the component to be assembled 14 (such as a camera, etc.), thereby implementing the PCBA 13 and the zero to be assembled. The lines of component 14 are in communication. During the board-to-board connector insertion process, the metal plating of the connector will be worn to a certain extent, and the base material will also have different degrees of wear. Therefore, the connector will correspond to a certain degree during the insertion and removal process. The service life. When the board-to-board connector is worn to affect the stability of the test or the correctness of the test results, the FPC test line can no longer be used.

When the number of FPC test lines is between 20 and 1000, the processing technology of the FPC test line is generally the process of sample processing for the production cost. The manufacturer will not put into the mass production process. And equipment production, the price of a single sample is higher than the volume production, therefore, resulting in FPC measurement The unit price of the test line is also relatively high. The FPC test line is mainly used in the PCBA test process. When the order quantity is between 10K and 1 000K, the number of FPC test lines used for testing is basically in the sample processing range according to the production statistics, so the production price Relatively high.

Summary of the invention

The invention proposes a new structure of FPC test line, and achieves the design goal of reducing the purchase cost of the FPC test line by extending the life of the FPC test line.

In order to solve the above technical problems, the present invention is implemented by the following technical solutions:

An FPC test line comprising a plurality of motherboard sockets for mating with connectors on a PCBA of an electronic device and at least one component socket for mating with a connector on a component to be assembled, a plurality of motherboards After the sockets are connected in parallel, they are connected to the same pins as the interfaces defined in the component sockets.

Wherein, the component sockets are preferably provided; when the component sockets comprise a plurality of components, the plurality of component sockets are connected in parallel, and are arranged adjacent to each other inwardly from one end of the FPC test line.

Further, the plurality of motherboard sockets are formed separately from the component sockets and disposed on the FPC test line, and in the group of motherboard sockets, a plurality of motherboard sockets are arranged adjacent to each other so as to be arranged on a certain motherboard. After the socket is severely worn, it is convenient to trim the FPC test line.

The shape of the FPC test line can be designed to have different shapes, such as a strip shape, an L shape, or a step shape. When the FPC test line is elongated, a plurality of motherboard sockets are arranged in parallel from one end of the FPC test line, and the component socket is disposed at the other end of the FPC test line. When the FPC test line is L-shaped, the plurality of motherboard sockets are preferably disposed on the long side of the L-shaped FPC test line, and the component sockets are disposed on the short sides of the L-shaped FPC test line. When the FPC test line is stepped, it is preferred to arrange one of the motherboard sockets or component sockets at the end of the FPC test line and at one of the inflection points of each step.

Preferably, the motherboard socket is disposed on a front surface of the FPC test line, and the component socket is disposed on a back surface of the FPC test line; and each of the motherboard sockets and the component sockets disposed on the FPC test line are disposed on opposite sides of the socket Support block to facilitate the insertion of the socket.

When the motherboard socket is a gold finger, the component socket is a gold finger connector, and is located at the FPC A corner point for marking the cutting position is set on the gold finger on the inner side of the test line to provide a shear reference.

Preferably, the exposed copper is added to the upper and lower sides of the gold finger on the inner side, and the exposed copper is used as a corner point, and the outer end surface of the exposed copper is on the same straight line as the outer end surface of the gold finger.

Of course, the main board socket can also use the male or female connector of the connector, and the number thereof is preferably between 3 and 6; correspondingly, the component socket is a female or male connector of the connector, preferably one is provided. .

I. Between 0. lmm至0. 2毫米之间。 The printed circuit line of the FPC test line is disposed on at least 1 layer of flexible circuit board, the width of the trace is between 0. lmm to 0. 2mm.

Compared with the prior art, the advantages and positive effects of the present invention are: The FPC test line of the present invention is provided with a plurality of connector sockets connected in parallel. When a socket is severely worn and cannot be used, the next socket can be used as a test connection. This greatly extends the life of the FPC test line. Due to the increase in the service life of the FPC test line, the manpower input of the tooling maintenance can be reduced on the one hand; on the other hand, the test station can be suspended during the tooling maintenance process, thereby reducing the impact on the test efficiency of the whole machine. In addition, the FPC test line has significantly reduced the cost of purchasing FPC test leads due to the extended service life of the FPC test line, which reduces the stand-alone cost of PCBA and makes the products produced more cost advantage.

Other features and advantages of the present invention will become more apparent from the detailed description of the embodiments.

DRAWINGS

1 is a schematic structural view of an embodiment of a conventional FPC test line;

2 is a schematic view showing a connection manner using the FPC test line shown in FIG. 1;

3 is a front structural view of a first embodiment of the F P C test line of the present invention; FIG. 4 is a schematic view of the back structure of the FPC test line shown in FIG. 3;

5 is a front structural view of a second embodiment of the FPC test line of the present invention; FIG. 6 is a schematic view of the back structure of the FPC test line shown in FIG. 5;

7 is a front structural view of a third embodiment of the FPC test line of the present invention; FIG. 8 is a schematic rear view of the FPC test line shown in FIG. 7; 9 is a schematic view showing a connection manner using the FPC test line shown in FIG. 3;

Figure 10 is a schematic diagram of the connection method using the FPC test line shown in Figure 5;

Figure 1 1 is a schematic diagram of the connection method using the FPC test line shown in Figure 7;

12 is a circuit schematic diagram of an embodiment of an FPC test line according to the present invention; FIG. 13 is a schematic diagram of an embodiment of trimming the FPC test line shown in FIG. 3 during actual use;

Figure 14 is a schematic illustration of another embodiment of the use of the FPC test line of Figure 3 for trimming during actual use;

15 is a front structural view showing an embodiment of a gold finger end of an FPC test line designed with a gold finger as a motherboard socket and a gold finger connector as a component socket;

Figure 16 is a schematic view showing the back structure of an embodiment of the FPC test line shown in Figure 15;

Figure 17 is a cross-sectional view of the FPC test line shown in Figure 16.

detailed description

The specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

In order to extend the service life of the FPC test line, a plurality of connector sockets (hereinafter referred to as motherboard sockets) for plugging corresponding to the connector jacks on the PCBA are simultaneously disposed on a single FPC test line, and at least A connector socket (hereinafter referred to as a component socket) for mating with a connector socket on a component to be assembled. Connect multiple motherboard sockets in parallel, and then define the same pin as the connector on the component socket - the corresponding connection, so that the signal connection between the motherboard socket and the component socket can be realized.

The motherboard socket and the component socket can be specifically designed according to the type of the connector socket on the PCBA and the component to be assembled, and the socket type matched with the socket type. For example: If the connector interface on the PCBA is a female connector, the motherboard socket should select the male connector of the connector; conversely, if the connector on the PCBA is male, the motherboard socket should be the female connector. Similarly, if the connector interface of the component to be assembled is male, the component socket should select the female; otherwise, if the connector of the component to be assembled is the female, the component socket should be male. If the connector interface on the PCBA is a gold finger connector, the motherboard socket should be a gold finger; otherwise, if the connector on the PCBA is a gold finger, the motherboard socket should be a gold finger connection. Device. Similarly, if the connector interface of the component to be assembled is a gold finger, the component socket should select a gold finger connector; otherwise, if the connector of the component to be assembled is a gold finger interface, the component socket should be a gold finger.

Considering that the FPC test line is plugged in after the actual use, it is generally unnecessary to unplug the parts to be assembled, and only need to plug the FPC test line of the plugged parts into On different mobile phone PCBAs, functional tests can be performed on PCBA of different mobile phones. Therefore, the component sockets are not easy to wear, and can be set only on the FPC test line to reduce the cost of the FPC test line; while the motherboard sockets are often inserted and removed, which tends to cause wear and tear, so multiple sets need to be set at the same time.

In this embodiment, the connector for connecting the camera on the mobile phone PCBA will be specifically described below as an example.

Assuming that the camera connector on the PCBA of the mobile phone is a female connector and the connector on the camera is a male connector, the male connector of the plurality of connectors and the female of at least one connector should be simultaneously set on the FPC test line when designing the FPC test line. head.

This embodiment is described by taking three male heads 3 and one female head 1 simultaneously on the FPC test line 1, as shown in Fig. 3 and Fig. 4. The three male heads 3 are formed in a separate arrangement from the female head 1 to facilitate subsequent trimming of the male head 3. For example, the female head 1 can be placed at one end of the FPC test line 2, and the remaining three male heads 3 are arranged so that the three male heads 3 are adjacent and spaced apart. The three males are connected in parallel with each other, and then connected to the female head 1, as shown in FIG. 12, the corresponding functional pins of the male and female connectors 1 are connected to each other to ensure that the signal is The mobile phone PCBA is correctly transmitted between the camera and the camera.

Of course, the female head 1 as the component interface can also be arranged on the FPC test line 2 at the same time according to the needs of actual use. If it is necessary to arrange a plurality of female heads 1 at the same time, the plurality of female heads 1 can be connected in parallel according to the connection mode of the male head 3 in Fig. 12, and then connected with the parallel male heads 3, that is, the male heads 3 and the female heads 1 are connected. The interfaces define the same function pins - correspondingly connected.

The minimum line width and the line spacing of the internal wiring of the FPC test line 1 may be set to 0. lmm, the width of the line is preferably between 0. lmm and 0. 2mm, wherein the power line and the special power supply requirements Or 2毫米。 The impedance required to be widened to 0. 2mm. If the male head 3 and the female head 1 are disposed on the same side of the FPC test line 1, and the outer width of the FPC test line 2 is sufficient, only one layer of the flexible circuit board may be provided. However, since the space on the test fixture is small and the FPC test line 2 is relatively narrow, it is preferable to print the circuit on a flexible circuit board of 2 or more layers to facilitate the layout design of the internal wiring of the FPC test 2. .

In this embodiment, the male head 3 and the female head 1 may be disposed on the same side of the FPC test line 2; or may be separately disposed on two sides, for example, the female head 1 may be disposed on the front side of the FPC test line 2. As shown in FIG. 3, the male head 3 is disposed on the back of the FPC test line 1, as shown in FIG. In order to facilitate the insertion and removal of the connector, it is also preferable to add a support block 4 on the reverse side of the position where the male head 3 and the female head 1 are mounted on the FPC test line 2, as shown in FIG. 3 and FIG. 4, each male head 3 and The female head 1 corresponds to a support block 4 to increase the strength of the connector. In this embodiment, the support block 4 can be designed by using a steel plate or an FR4 epoxy board, and the embodiment is not limited to the above examples.

In actual use, first insert the female head 1 on the FPC test line 1 with the camera 7, and then insert the male connector 3 on the outermost side of the FPC test line 2 into the connector female of the mobile phone PCBA. As shown in Figure 9, the functional test of the analog whole machine is started. If the male 3 on the outermost side is seriously worn, which affects the stability and correctness of the test results, the male head can be trimmed together with a section of the FPC test line attached thereto by means of a pliers, scissors, etc. A male (ie, the male in the middle position) is on the outermost side of the FPC test line, and the test connector is plugged into the phone's PCBA for continued use, see Figure 13. If the male is severely worn and unusable after prolonged use, you can further trim it off, use the remaining male connector as the test connector, and plug it into the connector of PCBA to continue using it. Referring to Figure 14, the service life of the FPC test line 2 can be increased by a factor of three. If there are more than three motherboard sockets on the test line, the life of the FPC test line can be increased more than once.

It should be noted that the number of board-to-board connectors is related to the electrical performance characteristics of the components under test, because the data transmitted in the FPC test line is often a high-frequency digital signal, which is complex in the factory. Electromagnetic environment (such as electromagnetic interference generated by the instrument used for testing, PCBA itself) Electromagnetic interference generated during test, electromagnetic interference generated by other products in the workshop and other product test instruments), in order to make the FPC test line have reliable anti-interference ability, the number of motherboard sockets of the board-to-board connector is 3~6. . In the actual application process, only a little debugging verification is needed to determine the optimal number of connectors.

The overall shape and length of the FPC test line and the layout of each connector need to be placed on the test fixture, so the specific design method will be different. For example: The FPC test line can be designed into an L shape. As shown in Fig. 5 and Fig. 6, the component socket (taking the female head 1 as an example) is placed on the short side of the L-shaped FPC test line 5 to facilitate the assembly to be assembled. The components (taking the camera 7 as an example) are plugged in, as shown in FIG. 10; the motherboard sockets (for example, the male head 3) are arranged in parallel from the outside to the inside in the long side of the L-shaped FPC test line 5 for insertion. Connect the mobile phone PCBA to facilitate the construction of a complete test system.

Of course, the FPC test line can also be designed in a stepped shape. As shown in Fig. 7 and Fig. 8, the male head 3 and the female head 1 are disposed at both ends of the FPC test line and at one of the inflection points of each step. Wherein, the female head 1 is disposed at one end of the front surface of the stepped FPC test line 6, as shown in FIG. 7, the back side mounting support block 4 opposite thereto; the male head 3 is respectively disposed at the other end of the back surface of the stepped FPC test line 6. And one of the other inflection points of each step, as shown in FIG. 8, and the front surface of the test line 6 opposite to each of the male heads 3 is respectively corresponding to one support block 4. The connection relationship of the FPC test line 6 in the actual application process is shown in Fig. 11.

Assuming that the camera connector on the PCBA of the mobile phone is a gold finger connector and the connector on the camera is a gold finger, multiple gold fingers and at least one gold finger connector should be set on the FPC test line when designing the FPC test line.

When a plurality of gold fingers are arranged on the FPC test line, considering that the width of the FPC test line is narrow, in this embodiment, a plurality of gold fingers are preferably arranged in parallel, and three gold fingers 17 , 18 , 19 are arranged in parallel. For example, as shown in FIG. 15, one end of the FPC test line 9 is arranged inwardly inward, and in the adjacent two gold fingers 17 and 18, 18 and 19, the pins of the same interface are defined by the lead 10 0. Corresponding connections, thereby achieving parallel connection of the gold fingers 17-19. Then, the gold finger 19 located at the innermost side is passed through the inner wire 1 of the FPC test line 9 and the gold finger connector 15 located at the other end of the FPC test line 9. The pins having the same interface definition are connected, as shown in FIG. 16, thereby achieving signal communication between the gold fingers 17-19 and the gold finger connector 15.

By adding the single row of gold fingers 6 on the original FPC test line to two rows, three rows or more rows, when the first row of gold fingers 17 located at the outermost side are severely worn out, they can be cut by tools such as scissors and scissors. Along with a length of lead 10 attached thereto, the second row of gold fingers 18 are placed at the end of the FPC test line 9 and connected to the handset PCBA for continued use. In this way, the life of the entire FPC test line 9 can be extended by a factor of two, three or even more, which significantly reduces the cost of purchasing the FPC test line 9.

Since the thickness of the pad of the gold finger 17-19 in the FPC test line 9 is close to the thickness of the lead 10 connected between the adjacent two gold fingers, the tester is often unable to accurately cut the problem. For the problem of difficulty in shearing, the present embodiment provides a corner point 12 for marking the cutting position on the gold finger 18 19 located inside the FPC test line 9 (the portion between the connectors at both ends is referred to as the inner side). As shown in Figure 15, to provide a shear reference.

As a preferred design, in the present embodiment, the corner points 12 are designed by adding a piece of exposed copper to the upper and lower sides of the gold fingers 18 19 located inside the FPC test line 9. Aligning the outer end surface of the exposed copper 12 with the outer end surface of the gold finger 18 19 , that is, on the same straight line, aligned with the left side of FIG. 15 , and cutting the gold finger 17 that has been damaged on the outer side, with the inner gold finger 18 The left edge is the base cut for precise positioning. The width L1 of the exposed copper 12 should be not less than 0.3 mm to clearly mark the cutting position.外形The shape accuracy after cutting with this reference can basically meet the error requirements of the golden finger, so that the design of the multi-row gold finger can really extend the service life of the FPC test line 9.

In order to meet the requirements of the cutting and dressing, when designing the FPC test line 9, the distance between the two adjacent gold fingers needs to be a certain distance, preferably between 1.5 and 2 mm, as shown in Fig. 15, the interval is an FPC test. The width of the film that can be effectively coated between the gold fingers during the production of the line 9. At the same time, when the gold finger is damaged due to its service life, it needs to be cut off from the FPC test line 9. This interval can meet the space requirement for cutting and trimming the FPC test line.

In this embodiment, the gold finger 17-19 and the gold finger connector 15 can be disposed on the FPC. The same side of the test line 9 can also be arranged separately on two sides. For example: Gold fingers 17-19 can be placed on the front side of FPC test line 9, and gold finger connector 15 is laid on the back side of FPC test line 9, as shown in Fig. 16, however, since FPC test line 9 is generally narrow, Therefore, it is preferable to print the circuit on a flexible circuit board of 2 or more layers to facilitate the layout design of the internal wiring of the FPC test line 9.

In order to facilitate the insertion and removal of the FPC test line 9 and the mobile phone PCBA, it is also preferable to attach a support block 13 to the reverse side of the position where the gold fingers 17-19 are mounted on the FPC test line 9 (ie, the back side of the FPC test line 9) to increase the connection. The strength of the device, as shown in Figure 16, and the total thickness of the position FPC test line 9 (including the thickness of the support block 13) is designed according to the specification of the corresponding connector. In this embodiment, the support block 13 can be designed by using a steel plate or an FR4 epoxy board, and the length L3 is preferably longer than the total length L2 of the plurality of rows of gold fingers 17-19 disposed on the FPC test line 9. 6 mm or more, as shown in Fig. 17, so that the insertion and removal operations can be easily performed when only the last row of gold fingers 9 are left.

After the design of the multi-row gold finger 17-19 is executed, since the FPC of the gold finger portion becomes long (that is, the area covered by the support block 13), the gold finger portion is easily bent and deformed, and the inner trace of the region is easily deformed by the deformation. Stretched and broken. Therefore, in this embodiment, the lead 10 between the adjacent two gold fingers is specially designed, and the width of the lead 10 is designed to be 0.15 mm or more to enhance the tensile resistance of the FPC.

Of course, the gold finger connector 15 can also be disposed on the FPC test line 9 at the same time according to the needs of actual use. If it is necessary to arrange a plurality of gold finger connectors 15 at the same time, a plurality of gold finger connectors 15 may be connected in parallel according to the connection manner of the gold fingers 17-19 in FIG. 15, and the other ends of the FPC test line 9 are sequentially in parallel in parallel. Arrange, and then connect with the parallel gold fingers 17-19, that is, the innermost gold finger and the gold finger connector can be connected in one-to-one correspondence with the same function pins.

15-17 are a design example in which an FPC test line provided with a gold finger and a gold finger connector is designed to be strip-shaped. Of course, the FPC test line can also be designed as L in the same manner as in FIGS. 5-8. Shape or step shape to fit on the test fixture.

Of course, the shape of the FPC test line can also be designed into other forms according to the specific needs of the test system, and the embodiment is not limited to the above examples. The connector disposed on the FPC test line can also be based on The specific type of the connector provided on the PCBA and the component to be assembled is adaptively selected, and this embodiment does not specifically limit this.

Applying the FPC test line of the embodiment to the function test of the mobile phone PCBA or the electronic device PCBA with similar connection mode, serving as an auxiliary connection device between the PCBA and the component to be assembled, and performing a functional test on the PCBA Therefore, the production cost of the PCBA and the maintenance cost of the tool can be reduced, thereby achieving the design goal of reducing the stand-alone cost of the electronic product.

Of course, the above description is only a preferred embodiment of the present invention, and those skilled in the art can make several improvements and retouchings without departing from the principles of the present invention. It should also be considered as the scope of protection of the present invention.

Claims

Claim

What is claimed is: 1. An FPC test line, comprising: a plurality of motherboard sockets for mating with connectors on a PCBA of an electronic device and at least one connector for mating with a connector on a component to be assembled; After the component sockets are connected in parallel, the same pins as those defined in the component sockets are connected.

2. The FPC test line according to claim 1, wherein: when the component sockets comprise a plurality of components, the plurality of component sockets are connected in parallel, and the one end of the FPC test line is sequentially arranged adjacent to each other. .

The FPC test line according to claim 1 or 1, wherein: the plurality of motherboard sockets are formed in a set separately from the component sockets on the FPC test line, and in the group of motherboard sockets. , multiple motherboard sockets are arranged adjacent to each other.

The FPC test line according to claim 3, wherein: the FPC test line has a long strip shape, and a plurality of motherboard sockets are arranged in parallel from one end of the FPC test line, and the component sockets are arranged on the FPC test line. The other end.

5. The FPC test line according to claim 3, wherein: the FPC test line is L-shaped, a plurality of motherboard sockets are arranged on a long side of the L-shaped FPC test line, and component sockets are arranged on the L-shaped FPC test line. Short side.

6. The FPC test line according to claim 3, wherein: the FPC test line is stepped, and a motherboard socket or a component socket is disposed at an end of the FPC test line and one of the inflection points of each step.

7. The FPC test line according to claim 3, wherein: the motherboard socket is disposed on a front surface of the FPC test line, and the component socket is disposed on a back surface of the FPC test line; and is disposed on the FPC test line. A support block is disposed on the opposite side of each of the motherboard sockets and the component sockets.

8. The FPC test line according to claim 3, wherein: the motherboard socket is a gold finger, and the component socket is a gold finger connector, and is disposed on a gold finger located inside the FPC test line. There are corner points for marking the cut position.

9. The FPC test line according to claim 8, wherein: the exposed copper is added to the upper and lower sides of the gold finger on the inner side, the exposed copper is used as a corner point, and the outer end surface of the exposed copper is The outer ends of the gold fingers are on the same line.

0毫米至0. 2毫米之间。 The FPC test line of the FPC test line, the printed circuit of the FPC test line is disposed on at least two layers of flexible circuit board, the width of the trace is between 0. lmm to 0. 2mm.