Abstract:
A flexible printed circuit board and optical network allocation device comprising same. The flexible printed circuit board comprises a circuit board body ( 1 ), a plurality of protruding interfaces ( 101 ) on the circuit board body, an adhesive layer ( 2 ) covering the upper surface of the circuit board body ( 1 ), components ( 102 ), and an uplink interface ( 103 ) used for information interaction with the components ( 102 ) on the circuit board body ( 1 ). Each protruding interface ( 101 ) is provided with an electronic label read/write interface ( 1011 ) used for reading electronic label information on an optical fiber head and an indicator ( 1012 ). The adhesive layer ( 2 ) is provided with an open window region ( 201 ) in the middle. The components ( 102 ) are immobilized on the upper surface of the circuit board body ( 1 ) and located in the open window region ( 201 ) of the adhesive layer, and are connected to the electronic label read/write interface ( 1011 ), the indicator ( 1012 ), and the uplink interface ( 103 ) respectively, used for controlling and monitoring the read/write information of the electronic label read/write interface ( 1011 ) and controlling on/off of the indicator ( 1012 ).

Description:
TECHNICAL FIELD 
       [0001]    The present disclosure generally relates to optical fiber network distribution techniques, and more particularly to an optical fiber network distribution device. 
       BACKGROUND 
       [0002]    Compared with a conventional passive optical fiber distribution network, an intelligent optical fiber distribution network further implements a function of intelligent optical fiber plug detection, which facilitates managing, identifying, maintaining optical fiber resources. Implementation of the intelligent optical fiber distribution network includes two aspects, i.e., new network construction and old network reconstruction. The new network construction is generally easy. During the new network construction, an overall intelligent optical fiber network device architecture may be designed newly, and an optical fiber connector and an optical fiber adapter may be designed into proper forms. However, it is difficult to reconstruct the conventional passive optical fiber distribution network into the intelligent optical fiber distribution network, since it is required that related network services cannot be interrupted during the reconstruction, which means that a rack, a fiber splice tray and an optical fiber adapter cannot be altered. 
         [0003]    A related solution is to replace an upper cover of an optical fiber fusing and wiring panel in the original system with a customized intelligent cover. The intelligent cover includes an upper cover member and an printed circuit board (PCB) which are specially customized. The customized upper cover member is made of plastic materials, and needs mould-opening, resulting in a high cost. The PCB needs to be customized based on the profile of the upper cover member so as to implement the function of the intelligent optical fiber plug detection. Since the structures of the upper cover member and the PCB of the fusing and wiring panel are limited by a conventional fusing and wiring panel housing, different upper covers and PCBs have to be manufactured for housings of the fusing and wiring panels of different types. These intelligent covers differ from each other only in their respective structures, but have no changes in the principles of hardware and software. Therefore, repetitive development for housings of different types may cause a huge waste in human and material resources. 
         [0004]    In a related reconstruction method, the PCB and the upper cover are assembled together. Only one surface of the PCB is protected by the upper cover, and the other surface of the PCB is exposed. Therefore, protection of components in the exposed surface of the PCB needs to be strengthened during transportation. Thereby, the overall weight of the assembly is increased, causing the cost of package material and transportation to increase. Furthermore, during in-field installation, the components in the PCB are vulnerable to mechanical crash damages and electrostatic damages, which may destroy the PCB and lead to a higher failure rate, causing the reconstruction cost to increase. Furthermore, the conventional optical fiber distribution network system is passive and has no power consumption. In view of this, power consumption of the system should be reduced as much as possible during the intelligentialization reconstruction, and thus most of related intelligentialization reconstruction solutions have a very low power consumption. Since the intelligent optical distribution network (ODN) system has a very low power consumption and produces little heat, when the ambient temperature is changed, condensation may be generated on the PCB easily. Long-time condensation may cause corrosion and short circuit between pins of components in the PCB or even disable the components. This situation occurs especially in the case that, in an outdoor optical wiring system, most of devices are not working normally and are powered on only when management is needed. In a poor outdoor weather condition, condensation on the PCB, component corrosion caused by water penetration and single board failure may occur frequently. 
         [0005]    Therefore, it may be desired to provide an intelligentialization reconstruction solution for an optical fiber distribution network, which can be suitable for bodies of fusing and wiring panels of most types and make the best to remain the original covers of the fusing and wiring panels unchanged. 
       SUMMARY 
       [0006]    In order to solve the problems of the above-described related solutions, the technical solutions of the present disclosure provide an optical fiber network distribution apparatus. Components in the apparatus may be protected from mechanical crash damages, electrostatic damages and component corrosion caused by condensation. 
         [0007]    In order to solve the problems, the disclosure provides the following technical solutions. 
         [0008]    A flexible printed circuit board, including: 
         [0009]    a circuit board body; 
         [0010]    a plurality of protruding interfaces arranged on the circuit board body, wherein the protruding interfaces include an electronic tag read/write interface for reading electronic tag information on a head of an optical fiber, and an indication light; 
         [0011]    an adhesive layer, covering an upper surface of the circuit board body and is provided with an open window region in middle of the adhesive layer; 
         [0012]    components, arranged to monitor reading/writing information of the electronic tag read/write interface and control on/off of the indication light, wherein the components are fixed on the upper surface of the circuit board body and located in the open window region of the adhesive layer; and
       an uplink interface, located on the circuit board body and arranged to perform information interaction with the components; wherein, the components are connected to the electronic tag read/write interface, the indication light and the uplink interface.       
 
         [0014]    According to an embodiment, an optical fiber adapter has a deflection angle of 45° to 90° with respect to a front mounting plate of a fusing and wiring panel housing. 
         [0015]    According to an embodiment, the protruding interface has a deflection angle of 45° to 90° with respect to the circuit board body. 
         [0016]    According to an embodiment, the electronic tag read/write interface is a contact interface or a contactless interface. 
         [0017]    According to an embodiment, the contact interface is a contact point or a connector. 
         [0018]    According to an embodiment, the contactless interface is a Radio Frequency Identification (RFID) antenna. 
         [0019]    According to an embodiment, the circuit board body is made of a material of polyimide, polyester film or polytetrafluoroethylene. 
         [0020]    According to an embodiment, the circuit board body have a rectangular shape. 
         [0021]    According to an embodiment, the uplink interface is a Flexible Printed Circuit (FPC) interface, a Registered Jack 45 (RJ45) interface, an Universal Serial Bus (USB) interface, a DB9 interface or a radio-frequency antenna interface. 
         [0022]    An optical fiber network distribution apparatus including the flexible printed circuit board according to any one of the flexible printed circuit boards, where the apparatus further includes: 
         [0023]    a fusing and wiring panel housing, fixed under the flexible printed circuit board and including an optical fiber adapter for connecting optical fiber; and
       a fusing and wiring panel upper cover covering the flexible printed circuit board, wherein an lower surface of the fusing and wiring panel upper cover is connected to the adhesive layer of the flexible printed circuit board, so as to package the components of the flexible printed circuit board within a space enclosed by the fusing and wiring panel upper cover, the adhesive layer and the circuit board body of the flexible printed circuit board.       
 
         [0025]    The beneficial effects of the technical solution of the disclosure are as follows. 
         [0026]    Compared to related intelligent fusing and wiring panel reconstruction solutions, the technical solution of the disclosure employs a construction method of a flexible printed circuit board (PCB). The flexible PCB is flexible, very thin and has certain plasticity. With this PCB, many types of conventional optical fiber fusing and wiring panels may be reconstructed into an intelligent optical fiber fusing and wiring panels. Therefore, the problem that different upper covers of the intelligent optical fiber fusing and wiring panels have to be designed for different types of fusing and wiring panel bodies to be reconstructed can be solved. Furthermore, the circuit board body has a small thickness and a light weight, and is equipped with a protective film, thereby dramatically reducing the cost of package and transportation. The components on the flexible PCB according to the technical solution of the disclosure are finally packaged within a space enclosed by the fusing and wiring panel upper cover, the adhesive layer and the flexible PCB. The antistatic performance may be substantially increased. Due to the sealing effect of the adhesive layer, the components on the flexible PCB will not be affected by ambient humidity and thus may have an improved environment adaptability, which greatly prolongs life spans of the circuit of the intelligent fusing and wiring panel. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0027]      FIG. 1  is a schematic diagram of an optical fiber network distribution apparatus according to an embodiment of the disclosure; and 
           [0028]      FIG. 2  is a schematic diagram of a flexible printed circuit board according to an embodiment of the disclosure. 
       
    
    
       [0029]    In the appended drawings, the following reference numbers may be used. 
         [0030]      1 : a circuit board body;  101 : protruding interface;  1011 : electronic tag read/write interface;  1012 : indication light;  102 : component;  103 : uplink interface;  2 : adhesive layer;  201 : open window region;  3 : protective film;  4 : fusing and wiring panel housing;  401 : optical fiber adapter;  5 : fusing and wiring panel upper cover. 
       DETAILED DESCRIPTION 
       [0031]    Exemplary embodiments of the disclosure will be described in detail in conjunction with the appended drawings. It should be understood that, although the appended drawings show the exemplary embodiments of the disclosure, the disclosure may be implemented in various was and is not limited to the embodiments herein. The embodiments are provided in order to make the skilled in the art understand the disclosure more thoroughly and appreciate the protection scope of the disclosure completely. 
         [0032]      FIG. 1  is a schematic diagram of an optical fiber network distribution apparatus according to an embodiment of the disclosure. The optical fiber network distribution apparatus includes a flexible printed circuit board, a fusing and wiring panel housing  4 , a fusing and wiring panel upper cover  5 . 
         [0033]    The flexible printed circuit board includes a circuit board body  1 , multiple protruding interfaces  101 , an adhesive layer  2 , components  102 , and an uplink interface  103 . 
         [0034]    The protruding interfaces  101  are arranged on the circuit board body  1 . The protruding interfaces  101  include an electronic tag read/write interface  1011  for reading electronic tag information on a head of an optical fiber, and an indication light  1012 . 
         [0035]    The adhesive layer  2  covers an upper surface of the circuit board body  1  and is provided with an open window region  201  in middle of the adhesive layer  2 . 
         [0036]    The components  102  are arranged to control reading/writing information of the electronic tag read/write interface  1011  and control on/off of the indication light  1012 . The components  102  are fixed on the upper surface of the circuit board body  1  and located in the open window region  201  of the adhesive layer  2 . 
         [0037]    The uplink interface  103  is located on the circuit board body  1  and arranged to perform information interaction with the components  102 . The components  102  are connected to the electronic tag read/write interface  1011 , the indication light  1012  and the uplink interface  103 . 
         [0038]    The fusing and wiring panel housing  4  is fixed under the flexible printed circuit board and includes an optical fiber adapter  401  for connecting optical fiber. 
         [0039]    The fusing and wiring panel upper cover  5  covers the flexible printed circuit board. A lower surface of the fusing and wiring panel upper cover  5  is connected to the adhesive layer  2 , so as to package the components  102  within a space enclosed by the fusing and wiring panel upper cover  5 , the adhesive layer  2  and the circuit board body  1 . 
         [0040]    According to the embodiment of the disclosure, the flexible printed circuit board is employed. The circuit board body  1  is flexible, very thin and has certain plasticity. With this flexible printed circuit board, many types of conventional optical fiber fusing and wiring panels may be reconstructed into an intelligent optical fiber fusing and wiring panels. Therefore, the problem that different upper covers of the intelligent optical fiber fusing and wiring panels have to be designed for different types of fusing and wiring panel bodies to be reconstructed can be solved. The protruding interfaces  101  are further provided on the circuit board body  1  for reading/writing electronic tag information on the head of the optical fiber. The uplink interface  103  is further arranged to perform information interaction between the fusing and wiring panel and the components  102 . That is, the uplink interface  103  uploads the electronic tag information from the intelligent fusing and wiring panel to the components  102 , and downloads control commands from the components  102  to the intelligent fusing and wiring panel. 
         [0041]    Furthermore, the circuit board body  1  may be made of a material of polyimide, polyester film, polytetrafluoroethylene or other polymer materials with a good overall performance. Therefore, the circuit board body  1  may have a high reliability and may be a printed circuit board with a good flexibility. In additional, the circuit board has a high wiring density, a light weight and a low thickness. It should be understood that, the material of the circuit board body  1  is not limited to those disclosed in the embodiment. 
         [0042]    According to the embodiment of the disclosure, optionally, before installation, the adhesive layer  2  is covered with a protective film  3  in order to protect the adhesive layer  2  and the components  102  on the flexible circuit board. The components  102  on the circuit board body  1  are finally packaged within a space enclosed by the fusing and wiring panel upper cover  5 , the adhesive layer  2  and the circuit board body  1 , so as to obtain a greatly improved antistatic performance. Due to the sealing effect of the adhesive layer  2 , the components  102  on the circuit board body  1  may be protected from the corrosion caused by condensation generated by ambient humidity, which greatly prolongs life spans of the circuit of the intelligent fusing and wiring panel. 
         [0043]    As shown in  FIG. 2 , according to the embodiment of the disclosure, the circuit board body  1  has a rectangular shape. However, in practice, the circuit board body  1  may have another shape. The profile of the circuit board body  1  may be changed depending on the fusing and wiring panel housings  4  of different types. For example, the circuit board body  1  may have other irregular shapes adapted to the fusing and wiring panel housings  4  of different types, so as to avoid a huge waste in human and material resources. 
         [0044]    According to the embodiment, in order to protect eyes of an operator from being hurt by a laser light conducted by an optical fiber, the optical fiber adapter  401  is arranged to have a certain deflection angle with respect to a front mounting plate of the fusing and wiring panel housing  4  rather than to be perpendicular to the front mounting plate. The optical fiber adapter  401  may have a deflection angle of 45° to 90° with respect to the front mounting plate of the fusing and wiring panel housing  4 . Since chassis of the fusing and wiring panels may be from different manufacturers, of different types or of different bands, the optical fiber adapters  401  in the chassis may be clamped square SCs, clamped circular STs, threaded circular FCs, clamped square LCs slightly smaller than the SCs and the like, depending on the chassis. In order to fit different types and brands of the optical fiber adapters  401  with different deflection angles, the disclosure employs the flexible printed circuit board with a certain flexibility. The protruding interfaces  101  may have a certain deflection angle with respect to the circuit board body  1 . The deflection angle of the protruding interfaces  101  with respect to the circuit board body  1  is fit to the deflection angle of the optical fiber adapter  401 . The deflection angle of the protruding interface  101  is 45° to 90° and is not influenced by the deflection angle of the optical fiber adapter  401  of the fusing and wiring panel to be reconstructed. 
         [0045]    According to the embodiment of the disclosure, optionally, the protruding interfaces  101  may include an electronic tag read/write interface  1011  and the uplink interface  103 . The electronic tag read/write interface  1011  may be a contact interface or a contactless interface. Depending on the electronic tag read/write interface  1011 , connection between the electronic tag read/write interface  1011  and an electronic tag on the optical fiber adapter  401  may be a wire contact connection or a wireless contactless connection. The contact interface is usually a contact point or a connector, and the contactless interface is usually a Radio Frequency Identification (RFID) antenna. The communication modes of the electronic tag are not limited to a contact tag 1-Wire, an Inter-Integrated Circuit (I2C), a Serial Peripheral Interface (SPI), or a contactless tag RFID, and is widely applicable. 
         [0046]    The uplink interface  103  is adapted to perform interaction about information in the electronic tag and the control commands in the components of the optical fiber network distribution apparatus. That is, the uplink interface  103  uploads port information from the intelligent fusing and wiring panel to the components  102 , and download control commands from the components  102  to the intelligent fusing and wiring panel, for example, to control on/off of the port indication light  1012 . The uplink interface  103  may be a Flexible Printed Circuit (FPC) interface, a Registered Jack 45 (RJ45) interface, an Universal Serial Bus (USB) interface, a DB9 interface or other pin and socket interfaces, or may be a radio-frequency antenna interface or other forms. It should be understood that, a specific structure of the uplink interface  103  according to the embodiment may be selected as required and is widely applicable. The uplink interface  103  may further be connected to other single boards of the optical fiber network distribution apparatus, and may communicate with the single boards through transmission protocols such as RS485, RS232, SPI, I2C, USB, Bluetooth or the like. 
         [0047]    Optionally, during installation, firstly, the flexible printed circuit board is placed to make the adhesive layer  2  face upward. The protective film  3  is removed so as to bond the flexible printed circuit board to the fusing and wiring panel upper cover  5  firmly. It should be noted that, the sealing of the adhesive layer around the components  102  causes the components  102  to be protected by the fusing and wiring panel upper cover  5 , the adhesive layer  2  and the flexible printed circuit board. Then, the fusing and wiring panel upper cover  5  mounted with the flexible circuit board is mounted into the fusing and wiring panel housing  4 . At last, the protruding interfaces  101  of the flexible circuit board are connected to the corresponding electronic tag or brought into contact with the electronic tag. 
         [0048]    The embodiments are preferred embodiments of the disclosure. It should be noted that, several modifications and variations which may fall within the protection scope of the disclosure, may be made by the skilled in the art, without departing from the principle of the discourse. 
       INDUSTRIAL APPLICABILITY 
       [0049]    Compared to related intelligent fusing and wiring panel reconstruction solutions, the technical solution of the disclosure employs a construction method of a flexible printed circuit board (PCB). The flexible PCB is flexible, very thin and has certain plasticity. With this PCB, many types of conventional optical fiber fusing and wiring panels may be reconstructed into an intelligent optical fiber fusing and wiring panels. Therefore, the problem that different upper covers of the intelligent optical fiber fusing and wiring panels have to be designed for different types of fusing and wiring panel bodies to be reconstructed can be solved. Furthermore, the circuit board body has a small thickness and a light weight, and is equipped with a protective film, thereby dramatically reducing the cost of package and transportation. The components on the flexible PCB according to the technical solution of the disclosure are finally packaged within a space enclosed by the fusing and wiring panel upper cover, the adhesive layer and the flexible PCB. The antistatic performance may be substantially increased. Due to the sealing effect of the adhesive layer, the components on the flexible PCB will not be affected by ambient humidity and thus may have an improved environment adaptability, which greatly prolongs life spans of the circuit of the intelligent fusing and wiring panel. Therefore, the disclosure has a high industrial applicability.