CN111600150A - Card slot converter, circuit board assembly and electronic equipment - Google Patents

Abstract

The present invention provides a card slot converter, a circuit board assembly and an electronic device. The card slot converter is used to be inserted into a card slot of a circuit board, and includes a card tray, a flexible circuit board and a plurality of probes arranged on the card tray, wherein the probes correspond to a first test point arranged in the card slot, and the first test point is used to test a test signal of the circuit board; one end of the flexible circuit board is located on the card tray, and the other end of the flexible circuit board extends out of the card tray; and the flexible circuit board is electrically connected to the plurality of probes. The present invention optimizes the layout of the circuit board, is conducive to placing more components on the circuit board, improves the space utilization of the circuit board, and also saves the cost of the circuit board to a great extent.

Description

Card slot converters, circuit board assemblies and electronic equipment

technical field

The present invention relates to the field of communication technology, in particular to a card slot converter, a circuit board assembly and an electronic device.

Background technique

With the rapid development of communication technology, more and more functions need to be implemented by electronic devices, so the area of the printed circuit board (PCB) needs to be larger and larger. However, due to the cost pressure of mobile terminals and battery life requirements, the effective area that can be used on the PCB is extremely limited.

At present, in addition to the layout of components and production test points on the PCB, it is also necessary to place test points for R&D commissioning. Among them, the test points for R&D and commissioning are an analysis method to solve difficult problems. The test point may be, for example, a Joint Test Action Group (JTAG), a Universal Asynchronous Receiver/Transmitter (UART), and the like.

However, the frequency of use of test points for R&D and commissioning is not high, and they occupy the effective space of the PCB layout, which has a great impact on the overall layout of the motherboard, greatly reducing the number of components that can be arranged on the PCB, and reducing the space utilization of the PCB. , while also increasing the production cost to a certain extent.

SUMMARY OF THE INVENTION

In order to solve at least one problem mentioned in the background art, the present invention provides a card slot converter, a circuit board assembly and an electronic device, which optimizes the layout of the circuit board, facilitates placing more components on the circuit board, and improves the circuit performance. The space utilization rate of the board is greatly reduced, and the production cost of the circuit board is also greatly saved.

In order to achieve the above objects, in a first aspect, the present invention provides a card slot converter for inserting into a card slot of a circuit board, comprising a card tray, a flexible circuit board and a plurality of probes arranged on the card tray, The probes are in one-to-one correspondence with the first test points arranged in the card slot, and the first test points are used to test the test signal of the circuit board; one end of the flexible circuit board is located on the card tray, The other end of the flexible circuit board protrudes from the card tray;

and the flexible circuit board is electrically connected with a plurality of the probes

In the above card slot converter, optionally, the flexible circuit board and the plurality of probes are electrically connected through wires.

In the above-mentioned card slot converter, optionally, a plurality of the probes are arranged at an edge position close to the upper surface of the card tray, and are arranged uniformly.

In the above card slot converter, optionally, the distance between the plurality of probes and the outer edge of the upper surface of the card tray is greater than or equal to 0.2 mm.

In a second aspect, the present invention further provides a circuit board assembly, comprising a circuit board and any one of the card slot converters described above; the card slot converters are detachably mounted on the circuit board; the circuit board A card slot is arranged on the card slot, and a first test point is arranged in the card slot.

In the above circuit board assembly, optionally, the circuit board has a card tray guide rail area, the card slot is provided on the card tray guide rail area, and the card slot converter is along the card tray The extending direction of the guide rail area is inserted into the card slot.

In the above circuit board assembly, optionally, there are a plurality of the first test points, and when the card slot converter is inserted into the card slot, a plurality of the probes and a plurality of the first test points The test points correspond to one-to-one contact.

In the above circuit board assembly, optionally, one end of the flexible circuit board extending out of the card tray is provided with a second test point, or, one end of the flexible circuit board extending out of the card tray is connected with a second test point. Connector.

In the above-mentioned circuit board assembly, optionally, an external detection device is connected to the second test point or the end of the connector away from the flexible circuit board, and the external detection device is used to detect a test from the first test point. A test signal for a test point.

In a third aspect, the present invention further provides an electronic device, comprising at least any one of the above circuit board assemblies.

The present invention provides a card slot converter, a circuit board assembly and an electronic device. The card slot converter includes a card tray, a flexible circuit board and a plurality of probes arranged on the card tray. The probes are connected to the card tray. The first test points in the card slot are in one-to-one correspondence, the first test point is used to test the test signal of the circuit board, one end of the flexible circuit board is located on the card tray, and the other end of the flexible circuit board is located on the card holder. The card tray extends out, and the flexible circuit board is electrically connected with a plurality of the probes.

Through the above arrangement, the card slot converter is inserted into the card slot on the circuit board, so that the plurality of probes are in electrical contact with the plurality of first test points arranged in the card slot, and then the flexible probes are electrically connected to the plurality of probes. The circuit board transmits the test signal from the first test point from the circuit board, that is, by setting the first test point in the card slot on the circuit board, and using the card slot converter to lead the test signal of the first test point out of the circuit The layout of the circuit board is optimized, which is conducive to placing more components on the circuit board, improves the space utilization rate of the circuit board, and also saves the production cost of the circuit board. Moreover, since one end of the flexible circuit board is located on the card tray of the card slot converter, and the other end of the flexible circuit board extends out of the card tray, it can realize that the test signal can be drawn out of the circuit board without disassembling the machine, that is, it can be The R&D and commissioning work can be carried out without disassembling the machine, which improves the operation efficiency of the R&D and commissioning work.

The configuration of the present invention and its other inventive objects and beneficial effects will be more clearly understood by the description of the preferred embodiments in conjunction with the accompanying drawings.

Description of drawings

In order to illustrate the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained according to these drawings without creative efforts.

1 is a schematic structural diagram of a card slot converter provided in Embodiment 1 of the present invention;

2 is another schematic structural diagram of the card slot converter provided in Embodiment 1 of the present invention;

3 is a partial enlarged schematic diagram of the card slot converter provided in Embodiment 1 of the present invention;

FIG. 4 is a schematic structural diagram of a circuit board assembly according to Embodiment 2 of the present invention;

FIG. 5 is another schematic structural diagram of the circuit board assembly provided in Embodiment 2 of the present invention;

FIG. 6 is a schematic flowchart of a method for using the circuit board assembly provided in Embodiment 2 of the present invention.

Description of reference numbers:

100 - circuit board assembly;

1-Card slot converter;

10 - Cato;

101-probe;

20-flexible circuit board;

30-wire;

2- circuit board;

21 - Cato rail area;

201 - the first test point;

40 - Connector.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below with reference to the accompanying drawings in the preferred embodiments of the present invention. Throughout the drawings, the same or similar reference numbers refer to the same or similar parts or parts having the same or similar functions. The described embodiments are some, but not all, of the embodiments of the present invention. The embodiments described below with reference to the accompanying drawings are exemplary, and are intended to explain the present invention and should not be construed as limiting the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention. The embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

In the description of the present invention, it should be noted that, unless otherwise expressly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. The medium is indirectly connected, which can be the internal communication of two elements or the interaction relationship between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

Example 1

FIG. 1 is a schematic structural diagram of a card slot converter according to Embodiment 1 of the present invention. FIG. 2 is another schematic structural diagram of the card slot converter provided in Embodiment 1 of the present invention. FIG. 3 is a partial enlarged schematic diagram of a card slot converter provided in Embodiment 1 of the present invention.

The embodiment of the present invention provides a card slot converter 1. In addition to the layout of components and production test points, the current PCB also needs to place test points for R&D and commissioning, wherein the test points for R&D and commissioning only solve difficult problems In addition, the frequency of use of test points for R&D and commissioning is not high, which occupies the effective space of the PCB layout and has a great impact on the overall layout of the motherboard, which greatly reduces the number of components that can be arranged on the PCB, reducing the cost of The space utilization rate of PCB is not conducive to the high requirements for PCB board layout of intelligent terminal components with higher and higher integration, and at the same time, it also increases the production cost to a certain extent.

In the prior art, there are multiple components on the PCB board. By setting the test point on the PCB board, and arranging a movable switch member on the PCB board to be electrically connected to the test point, the switch member can be selectively connected to multiple components. One of the components is electrically connected, so that during the movement of the switch on the PCB, different components can be tested through one test point, but this method can only use one test point to conduct conduction with different signals to be tested , it cannot meet the commissioning scenarios where multiple signals are required for R&D commissioning at the same time.

In order to solve the above technical problems, as shown in FIG. 1 and FIG. 2 , the first embodiment of the present invention provides a card slot converter 1 for inserting into a card slot (not shown in the figure) of a circuit board 2 . The slot converter 1 includes a card tray 10 , a flexible circuit board 20 and a plurality of probes 101 arranged on the card tray 10 . The probes 101 are in one-to-one correspondence with the first test points 201 arranged in the card slot. The first test points 201 is used to test the test signal of the circuit board 2 . One end of the flexible circuit board 20 is located on the card tray 10 , the other end of the flexible circuit board 20 extends out of the card tray 10 , and the flexible circuit board 20 is electrically connected to the plurality of probes 101 .

In a possible implementation manner, the flexible circuit board 20 and the plurality of probes 101 are electrically connected through wires 30 .

The specific set quantity of the probes 101 may be flexibly set according to the requirements of the actual application scenario, which is not limited in this embodiment of the present invention.

In order to make the probes 101 effectively make electrical contact with the external test points, a plurality of probes 101 are arranged at the edge positions close to the upper surface of the card tray 10 , and are evenly arranged at the edge positions close to the upper surface of the card tray 10 . It is beneficial to further optimize the layout of the circuit board 2 .

Of course, in some other embodiments, the probes 101 can also be disposed at other positions on the card tray 10 as long as electrical contact with external test points can be achieved. For example, the probes 101 can also be disposed on the card trays 10 at the center position.

As an optional embodiment, as shown in FIG. 3 , the distance L1 between the plurality of probes 101 and the outer edge of the upper surface of the card tray 10 is greater than or equal to 0.2 mm. In this way, the reliability and service life of the probe 101 can be improved, and problems such as wear or failure of the probe 101 caused by the wear of the outer edge of the card tray 10 during the long-term use of the card slot converter 1 can be avoided.

Embodiment 1 of the present invention provides a card slot converter, which is used to be inserted into a card slot of a circuit board, and includes a card tray, a flexible circuit board, and a plurality of probes disposed on the card tray. The probes are connected to the card tray. The first test points in the card slot correspond one by one, the first test point is used to test the test signal of the circuit board, one end of the flexible circuit board is located on the card tray, the other end of the flexible circuit board protrudes out of the card tray, and the flexible circuit board Electrically connected to a plurality of probes.

Through the above arrangement, the card slot converter is inserted into the card slot on the circuit board, so that the plurality of probes are in electrical contact with the plurality of first test points arranged in the card slot in one-to-one correspondence, and then the plurality of probes are electrically contacted with the plurality of probes. The electrically connected flexible circuit board transmits the test signal (such as UART, JTAG, etc.) from the first test point from the circuit board, that is, by setting the first test point in the card slot on the circuit board, using the card slot The converter leads the test signal of the first test point out of the circuit board, which optimizes the layout of the circuit board, is conducive to placing more components on the circuit board, improves the space utilization rate of the circuit board, and saves the production of the circuit board. cost. Moreover, since one end of the flexible circuit board is located on the card tray of the card slot converter, and the other end of the flexible circuit board extends out of the card tray, it can realize that the test signal can be drawn out of the circuit board without disassembling the machine, that is, it can be The R&D and commissioning work can be carried out without disassembling the machine, which improves the operation efficiency of the R&D and commissioning work.

Embodiment 2

FIG. 4 is a schematic structural diagram of a circuit board assembly according to Embodiment 2 of the present invention. FIG. 5 is another schematic structural diagram of the circuit board assembly provided in the second embodiment of the present invention. FIG. 6 is a schematic flowchart of a method for using the circuit board assembly provided in Embodiment 2 of the present invention.

On the basis of the above-mentioned first embodiment, the second embodiment of the present invention further provides a circuit board assembly 100, and the PCB board assembly 100 can be used in electronic devices such as mobile phones, tablet computers, notebook computers or game consoles. As shown in FIG. 4 and FIG. 5 , the circuit board assembly 100 may include a circuit board 2 and the card slot converter 1 in the above-mentioned first embodiment, wherein the card slot converter 1 is detachably mounted on the circuit board 2, and the circuit The board 2 is provided with a card slot, and a first test point 201 is arranged in the card slot. Wherein, the circuit board 2 may be a PCB.

Specifically, as shown in FIG. 4 , the circuit board 2 has a card tray guide rail area 21 , the card slot is arranged on the card tray guide rail area 21 , and the card slot converter 1 can be inserted into the card tray along the extending direction of the card tray guide rail area 21 . within 22.

Further, as shown in FIG. 5 , a plurality of first test points 201 may be provided in the card slot (ie, in the card slot of the card tray guide rail area 21 ), that is, there may be multiple first test points 201 . In this way, when the card slot converter 1 is inserted into the card slot, the plurality of probes 101 can be in one-to-one correspondence with the plurality of first test points 201 to achieve electrical contact.

In the embodiment of the present invention, the specific set number of the first test points 201 can be flexibly set according to the requirements of the actual application scenario, which is not limited in the embodiment of the present invention, as long as it corresponds to the position of the probe 101 and can be Make electrical contact.

In the embodiment of the present invention, after the card slot converter 1 is inserted into the card slot of the card tray guide rail area 21, the transmission of the test signal of the first test point 201 includes but is not limited to the following two possible implementations:

A possible implementation is: the end of the flexible circuit board 20 in the card slot converter 1 protruding from the card tray 10 is provided with a second test point (not shown in the figure), so that the second test point The test signal from the first test point 201 can be obtained through the detection, that is, the test signal can be drawn out of the circuit board 2 without disassembling the machine, that is, the R&D and debugging work can be carried out without disassembling the machine, which improves the Operational efficiency of R&D commissioning work.

Another possible implementation is: as shown in FIG. 1 , the connector 40 is connected to the end of the flexible circuit board 20 in the card slot converter 1 that protrudes from the card tray 10 . In this way, the detection of the connector 40 can be passed. Obtaining the test signal from the first test point 201 can realize that the test signal can be drawn out of the circuit board 2 without disassembling the machine, that is, the R&D and debugging work can be carried out without disassembling the machine, which improves the research and development adjustment. Measure work efficiency.

In the embodiment of the present invention, the second test point or the end of the connector 40 away from the flexible circuit board 20 may be connected with an external detection device (not shown in the figure), so that the external detection device can be used to detect the test from the first test point 201 test signal.

As an optional implementation manner, the external testing device may be a multi-channel oscilloscope. For example, by inserting the probe of the multi-channel oscilloscope into the corresponding second test point or connector 40, a plurality of signals from the first test can be measured simultaneously. Test signal at point 201.

Of course, in some other embodiments, one of the test signals from the first test point 201 can also be measured individually by inserting a common oscilloscope probe into the corresponding second test point or connector 40 .

An embodiment of the present invention also provides a method for using the circuit board assembly 100. Referring to FIG. 6, the method may specifically include the following steps:

S101: set the first test point 201 in the card slot of the circuit board 2;

S102 : Insert the card slot converter 1 into the card slot, wherein the card tray of the card slot converter 1 is provided with a probe 101 for making electrical contact with the first test point 201 .

Specifically, the card slot converter 1 includes a card tray 10 , a flexible circuit board 20 and a plurality of probes 101 disposed on the card tray 10 . One end of the flexible circuit board 20 is located on the card tray 10 , the other end of the flexible circuit board 20 extends out of the card tray 10 , and the flexible circuit board 20 is electrically connected to the plurality of probes 101 . In this way, by inserting the card slot converter 1 into the card slot, the probe 101 can be electrically contacted with the first test point 201 in the card slot.

Moreover, since one end of the flexible circuit board 20 is located on the card tray 10, the other end of the flexible circuit board 20 protrudes out of the card tray 10, and the flexible circuit board 20 is electrically connected to the plurality of probes 101 through the wires 30. In this way, the flexible circuit board 20 can transmit the test signal (such as UART, JTAG and other signals) from the first test point 201 from the circuit board 20, that is, by setting the first test point 201 in the card slot on the circuit board 2, using the card slot The converter 1 leads the test signal of the first test point 201 out of the circuit board 2 .

In addition, a second test point (not shown in the figure) may also be provided at the end of the flexible circuit board 20 extending out of the card tray, or a connector 40 may be connected to the end of the flexible circuit board 20 extending out of the card tray. In this way, the test signal from the first test point 201 can be obtained by detecting the second test point or the connector 40 .

Other technical features are the same as those in the first embodiment, and can achieve the same technical effects, and will not be repeated here.

The circuit board assembly provided in the second embodiment of the present invention includes a circuit board and a card slot converter detachably mounted on the circuit board, the circuit board is provided with a card slot, and the card slot is provided with a first test point , wherein the card slot converter includes a card tray, a flexible circuit board and a plurality of probes arranged on the card tray, the probes are in one-to-one correspondence with the first test points set in the card slot, and the first test points are used for testing For the test signal of the circuit board, one end of the flexible circuit board is located on the card tray, the other end of the flexible circuit board extends out of the card tray, and the flexible circuit board is electrically connected with a plurality of probes.

Through the above arrangement, the card slot converter is inserted into the card slot on the circuit board, so that the plurality of probes are in electrical contact with the plurality of first test points arranged in the card slot in one-to-one correspondence, and then the plurality of probes are electrically contacted with the plurality of probes. The electrically connected flexible circuit board transmits the test signal (such as UART, JTAG, etc.) from the first test point from the circuit board, that is, by setting the first test point in the card slot on the circuit board, using the card slot The converter leads the test signal of the first test point out of the circuit board, which optimizes the layout of the circuit board, is conducive to placing more components on the circuit board, improves the space utilization rate of the circuit board, and saves the production of the circuit board. cost. Moreover, since one end of the flexible circuit board is located on the card tray of the card slot converter, and the other end of the flexible circuit board extends out of the card tray, it can realize that the test signal can be drawn out of the circuit board without disassembling the machine, that is, it can be The R&D and commissioning work can be carried out without disassembling the machine, which improves the operation efficiency of the R&D and commissioning work.

Embodiment 3

On the basis of the above-mentioned first and second embodiments, the third embodiment of the present invention further provides an electronic device, and the electronic device includes at least the circuit board assembly 100 in the above-mentioned second embodiment.

By arranging the above circuit board components in the electronic equipment, the size of the circuit board in the electronic equipment is reduced, which not only provides effective space for the installation of other components in the electronic equipment, but also reduces the size of the entire electronic equipment, optimizing the Experience effects of electronic devices. At the same time, the stability of signal transmission in the electronic device is also ensured, and the normal operation of the electronic device is ensured.

It should be noted that the electronic devices provided by the embodiments of the present invention may include but are not limited to mobile phones, tablet computers, notebook computers, ultra-mobile personal computers (UMPC for short), handheld computers, walkie-talkies, netbooks, Mobile or stationary terminals having the above circuit board assembly 100, such as POS step machines, personal digital assistants (personal digital assistants, PDAs for short), wearable devices, virtual reality devices, and the like.

Other technical features are the same as those of the first and second embodiments, and can achieve the same technical effects, which will not be repeated here.

In the electronic device provided in the third embodiment of the present invention, the electronic device includes at least a circuit board assembly, and the circuit board assembly includes a circuit board and a card slot converter detachably mounted on the circuit board, and the card slot converter includes a card tray, A flexible circuit board and a plurality of probes arranged on the card tray, the probes are in one-to-one correspondence with the first test points set in the card slot, the first test point is used to test the test signal of the circuit board, one end of the flexible circuit board On the card tray, the other end of the flexible circuit board protrudes out of the card tray, and the flexible circuit board is electrically connected with a plurality of probes.

Through the above arrangement, the card slot converter is inserted into the card slot on the circuit board, so that the plurality of probes are in electrical contact with the plurality of first test points arranged in the card slot in one-to-one correspondence, and then the plurality of probes are electrically contacted with the plurality of probes. The electrically connected flexible circuit board transmits the test signal (such as UART, JTAG, etc.) from the first test point from the circuit board, that is, by setting the first test point in the card slot on the circuit board, using the card slot The converter leads the test signal of the first test point out of the circuit board, which optimizes the layout of the circuit board, is conducive to placing more components on the circuit board, improves the space utilization rate of the circuit board, and saves the production of the circuit board. cost. Moreover, since one end of the flexible circuit board is located on the card tray of the card slot converter, and the other end of the flexible circuit board extends out of the card tray, it can realize that the test signal can be drawn out of the circuit board without disassembling the machine, that is, it can be The R&D and commissioning work can be carried out without disassembling the machine, which improves the operation efficiency of the R&D and commissioning work.

In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", The orientation or positional relationship indicated by "outside" is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, It is constructed and operated in a particular orientation and is therefore not to be construed as a limitation of the present invention. In the description of the present invention, "plurality" means two or more, unless otherwise precisely and specifically specified.

The terms "first", "second", "third", "fourth", etc. (if any) in the description and claims of this application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It is to be understood that the data so used may be interchanged under appropriate circumstances such that the embodiments of the application described herein can, for example, be practiced in sequences other than those illustrated or described herein. Furthermore, the terms "comprising" and "having" and any variations thereof, are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those expressly listed Rather, those steps or units may include other steps or units not expressly listed or inherent to these processes, methods, products or devices.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: The technical solutions described in the foregoing embodiments can still be modified, or some or all of the technical features thereof can be equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the embodiments of the present invention. scope.

Claims (10)

1. A card slot converter for inserting into a card slot of a circuit board, characterized in that it comprises a card tray, a flexible circuit board and a plurality of probes arranged on the card tray, and the probes are arranged with the The first test points in the card slot are in one-to-one correspondence, and the first test point is used to test the test signal of the circuit board; one end of the flexible circuit board is located on the card tray, and the The other end extends out of the card tray; And the flexible circuit board is electrically connected with a plurality of the probes. 2 . The card slot converter according to claim 1 , wherein the flexible circuit board and the plurality of probes are electrically connected by wires. 3 . 3 . The card slot converter according to claim 1 or 2 , wherein a plurality of the probes are arranged at an edge position close to the upper surface of the card tray, and are arranged uniformly. 4 . 4 . The card slot converter according to claim 3 , wherein the distance between the plurality of probes and the outer edge of the upper surface of the card tray is greater than or equal to 0.2 mm. 5 . 5. A circuit board assembly, characterized in that it comprises a circuit board and the card slot converter according to any one of the preceding claims 1-4; the card slot converter is detachably mounted on the circuit board; A card slot is arranged on the circuit board, and a first test point is arranged in the card slot. 6 . The circuit board assembly according to claim 5 , wherein the circuit board has a card tray guide rail area, the card slot is arranged on the card tray guide rail area, and the card slot converter is along the The extension direction of the card tray guide rail area is inserted into the card slot. 7 . The circuit board assembly according to claim 6 , wherein there are a plurality of the first test points, and when the card slot converter is inserted into the card slot, a plurality of the probes and a plurality of The first test points are in one-to-one correspondence. 8 . The circuit board assembly according to claim 7 , wherein a second test point is provided at one end of the flexible circuit board protruding from the card tray, or the flexible circuit board protrudes from the card tray. 9 . One end is connected with a connector. 9 . The circuit board assembly according to claim 8 , wherein an external testing device is connected to the second test point or the end of the connector away from the flexible circuit board, and the external testing device is used for testing a test signal from the first test point. 10. An electronic device, characterized in that it comprises at least the circuit board assembly according to any one of the preceding claims 5-9.

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