CN105137545A - an optical cable assembly - Google Patents

Abstract

The invention relates to an optical cable assembly, comprising an optical fiber connector and an optical fiber backplane, a first optical fiber backplane unit of the optical fiber backplane comprises a first backplane base body, and a first backplane is arranged on the first backplane base body of the first backplane unit Through the groove, the second backplane base of the second backplane unit of the optical fiber backplane includes the right side section of the second backplane above the first backplane base for the outlet end of the second optical fiber, and the second backplane base on the first backplane base. The left side section of the second backplane below for the entry end of the second optical fiber is arranged and the middle section of the second backplane connected between the left side section of the second backplane and the right section of the second backplane, the second backplane The middle section of the board is passed through the first backplane through the groove, the entry end of the second optical fiber ribbon is located below the entry end of the first optical fiber ribbon, and the exit end of the second optical fiber is located above the exit end of the first optical fiber ribbon . The invention provides an optical cable assembly capable of realizing that the optical fibers between the optical fiber backplane units can cross in the up and down direction.

Description

an optical cable assembly

technical field

The invention relates to optical cable assemblies in the field of optical signal transmission.

Background technique

With the continuous development of information technology, optical fiber transmission is used in more and more communication systems. In order to achieve high-density transmission of optical signals, the application of optical fiber ribbons containing multiple optical fibers is born. The traditional optical fiber ribbons are flat ribbons. Form, which consists of 4, 8, 12, 24 or other numbers of bare optical fibers side by side. When used, a special type of connector is made at the input end of the optical fiber and the output end of the optical fiber to transmit optical signals. When this form of optical fiber transmits signals, there is a one-to-one correspondence between the signals at one end and the other end, and the signal cannot be transmitted from one optical fiber ribbon to another optical fiber ribbon. As the processing capacity of information system data increases, Signal crossing between fiber optic ribbons is inevitable. Existing fiber optic backplanes with intersecting fiber optic ribbons are used, such as the fiber optic backplane disclosed in US Patent No. 6,744,956. The fiber optic backplane includes first fiber optic backplane units stacked up and down. and a second optical fiber backplane unit, the second optical fiber backplane unit includes a first backplane base, the second optical fiber backplane unit includes a second backplane base, two first optical fiber ribbons are arranged on the first backplane base, and the second Two second optical fiber ribbons are arranged on the base of the second backplane, the fiber inlet ends of the two first optical fiber ribbons are arranged at intervals left and right, the fiber inlet ends of the two second optical fiber ribbons are arranged at intervals left and right, and the two first optical fiber ribbons are arranged at intervals left and right. The fiber-entry ends of the first and second fiber ribbons are above the fiber-entry ends of the two second fiber ribbons, and the fiber outlet ends of the first and second fiber ribbons are crossed and recombined to form four new fiber ribbons to complete the cross-transmission of optical fiber signals. The fiber outlet end of the first fiber ribbon is above the fiber outlet end of the second fiber ribbon. The problem with the existing optical fiber backplane is that the optical fibers between the optical fiber backplane units can only cross in the horizontal direction, but not in the vertical direction. It is above the fiber inlet end of the second fiber ribbon, and the fiber outlet end of the first fiber ribbon is above the fiber outlet end of the second fiber ribbon. With the rapid development of communication equipment, the application of multi-row high-density fiber optic connectors is increasing. The more extensive, when the signals between the rows of multi-row fiber optic connectors are interactively connected, this kind of fiber optic backplane cannot solve the problem.

Contents of the invention

The purpose of the present invention is to provide an optical cable assembly which can realize the crossing of the optical fibers between the optical fiber backplane units in the vertical direction.

In order to solve the above problems, the technical solution of the optical cable assembly in the present invention is:

The optical cable assembly includes an optical fiber connector and an optical fiber backplane, the optical fiber backplane includes a first optical fiber backplane unit and a second optical fiber backplane unit, the first optical fiber backplane unit includes a first backplane base, and the first backplane base is provided with There is a first optical fiber ribbon connected to the optical fiber connector for transmitting optical signals in the front-rear direction, the second optical fiber backplane unit includes a second backplane base, and the second backplane base is provided with a fiber optic ribbon connected to the optical fiber connector. The second optical fiber ribbon, the first backplane base is provided with a first backplane through groove penetrating through the first backplane base along the thickness direction of the first backplane base, and the second backplane base includes The right section of the second backplane above the backplane matrix for the outlet end of the second optical fiber, the left section of the second backplane below the first backplane matrix for the entry end of the second optical fiber, and The middle section of the second backplane connected between the left section of the second backplane and the right section of the second backplane, the middle section of the second backplane passes through the groove of the first backplane, and the second The entry end of the optical fiber ribbon is located below the entry end of the first optical fiber ribbon, and the exit end of the second optical fiber is located above the exit end of the first optical fiber ribbon.

The second backplane base is made of flexible material.

There are at least two first optical fiber ribbons, and the optical fibers in each first optical fiber ribbon are crossed and recombined on the right side of the first backplane through groove, and the first backplane through groove is located in the middle left of the first backplane base.

The left end of the first backplane through groove extends to the left side of the first backplane base, and the second backplane base is provided with a right end penetrating through the second backplane base along the thickness direction of the second backplane base. Extending to the second backplane through groove on the right side of the second backplane base, the first backplane base includes a hole for the outlet end of the second optical fiber ribbon located below the right section of the second backplane The right section of the first backplane, the left section of the first backplane located above the left section of the second backplane for the entry end of the second optical fiber ribbon, and the left section connected to the left section of the first backplane The middle section of the first backplane between the right section of the first backplane is passed through the second backplane through groove.

The first backplane base is made of flexible material.

The beneficial effects of the present invention are: by setting the first backboard through groove on the first backboard base body, when in use, the middle section of the second backboard passes through the first backboard through groove to realize the right side of the second backboard. section is above the base of the first backplane, and the left section of the second backplane is below the base of the first backplane, so that the entry end of the second optical fiber ribbon arranged on the left section of the second backplane can be at the first Below the optical fiber ribbon, the outlet end of the second optical fiber ribbon arranged on the right side of the second backplane can be above the second optical fiber ribbon, so that the optical fibers between the optical fiber backplane units cross each other in the up and down direction, thereby It is suitable for use in the environment where the signals between rows of multi-row fiber optic connectors are interactively connected.

Description of drawings

Fig. 1 is a diagram of the use state of the optical fiber connector and the adapted optical fiber connector in the present invention;

Fig. 2 is a schematic diagram of the structure when the optical fiber connector in Fig. 1 is plugged with the adapted optical fiber connector;

Fig. 3 is an enlarged view of place A of Fig. 2;

Fig. 4 is a schematic diagram of cooperation between the contact unit and the optical fiber in Fig. 1;

Fig. 5 is a schematic diagram of cooperation between the plug housing and the floating installation mechanism in X and Y directions in the present invention;

Fig. 6 is the top view of Fig. 2;

Fig. 7 is a C-C cross-sectional view of Fig. 6;

Fig. 8 is an enlarged view at B of Fig. 6;

Fig. 9 is an enlarged view at D in Fig. 7;

Fig. 10 is a schematic structural view of an optical fiber backplane in the present invention;

Fig. 11 is a schematic diagram of the manufacturing process of the optical fiber backplane in Fig. 10;

Fig. 12 is a schematic structural diagram of the first optical fiber backplane unit in Fig. 10;

Fig. 13 is a schematic structural diagram of a second optical fiber backplane unit in Fig. 10;

Fig. 14 is a schematic structural view of the substrate tape in Fig. 10;

Fig. 15 is a schematic diagram of the optical fiber connection between the neutron board plug and another plug of the present invention.

Detailed ways

The embodiment of the optical cable assembly is shown in Figures 1 to 15: the optical cable assembly includes an optical fiber connector and an optical fiber backplane. The plug 3 includes a plug housing, and the plug housing includes a plug part housing 8, a locking housing 6 and a floating housing 5, wherein the front end of the plug part housing is a plug end, and the plug part housing is made of an insulating material. A contact unit is provided in the housing of the plug part, and the contact unit includes a pin body 11 and a limit seat 12 arranged front and back. In this embodiment, the limit seat is a two-body limit seat, and the pin body includes an MT pin. The limiting seat 12 is provided with an elastic arm 8, the elastic arm 8 is provided with a locking protrusion 9, and the plug part housing 8 is provided with a draw-in groove that cooperates with the locking protrusion 9, and the limiting seat 12 and the pin body The first spring 10 is installed on the top between 11, and the limit seat has a main channel for the corresponding optical fiber to pass along the front and rear direction and an auxiliary channel 13 for the optical fiber 14 to pass along the vertical to the front and rear direction. In this embodiment, the optical fiber is a ribbon structure. The limit seat is a square sleeve structure, and the auxiliary channel 13 is arranged at an edge of the direction sleeve. Through the setting of the auxiliary channel, the limit seat 12 can be taken out from the optical fiber along the direction perpendicular to the front and back, so that when the limit seat is damaged, only the limit seat needs to be replaced.

The plug part housing 8 is a flat block structure whose thickness extends in the up-down direction and whose width extends in the left-right direction. The plug part housing is provided with an elastic push rod 21. The end of the push rod body 22 is elastically suspended forward. The elastic push rod is arranged on the upper end of the plug part housing. There is a deformation gap between the plug part housing and the overhanging end of the push rod body for elastic deformation of the elastic push rod along the up and down direction. 20. The overhanging end of the push rod body 22 is provided with a housing stopper structure 24 that cooperates with the floating housing 5 to limit the forward movement of the floating housing. The floating housing is provided with a lock that pushes the housing stopper structure 24. Tightly push the push part 23. In this embodiment, the housing stop structure 24 is a protrusion protruding from the upper end of the push rod body 22. The force bearing part 25 is pushed by the socket housing before the body is blocked by the corresponding socket part housing. The body stop structure lets go of the floating housing 5, the floating housing 5 can move relative to the plug part housing 8 in the front and rear directions, and the force-bearing part 25 is located on the upper side of the push rod body. Through the above structure, the Z-direction floating of the floating housing corresponding to the housing of the plug part can be realized, and the Z-direction corresponds to the front-back direction.

The plug part housing is provided with a locking groove 28 for cooperating with the locking hook on the backplane socket. The locking hook 27 is an elastic hook that can float with the elastic tongue 26 inserted. The locking housing 6 is guided along the front and rear directions. It is movable and assembled on the plug part housing 8. A second spring 10 for applying a forward force to the locking case is arranged between the locking case 6 and the plug part case 8. The locking case 6 has a In the direction perpendicular to the front and back direction, it is limitedly matched with the locking hook 27 to prevent the locking hook from coming out of the locking groove. part 30, the longitudinal pressure-bearing part 30 is located on the front side of the lateral pressure-applying part 29, when the sub-board plug and the backplane socket are mated, the end of the locking hook 27 pushes the longitudinal pressure-bearing part 30, so that the locking shell The body 6 moves backward, and when the locking hook 27 enters the locking groove 28, the locking hook no longer pushes the locking housing, and is subjected to the active force of the second spring, the locking housing moves forward, and the locking housing The horizontal pressing part 29 on the top moves to the position of the locking hook, and the locking hook is limited by the horizontal pressing part 29 to prevent the locking hook from coming out of the locking groove 28, so as to realize the connection between the sub-board plug and the backplane socket. of the lock. The locking housing is provided with a guide groove 35 extending in the front-rear direction. The rear groove wall 37 of the guide groove 35 is an inclined wall gradually inclined forward from bottom to top. The floating housing is provided with a barb located in the guide groove. 36, the barb 36 can move in the guide groove 35, and the barb 36 is adapted to the slope of the rear side groove wall of the guide groove 35, so that when the sub-board moves backward with the floating housing, the barb 36 can carry the lock The tight housing 6 moves backward, so that the lateral pressing part is removed from the locking hook, thereby realizing unlocking. The unlocking of the locking shell is realized by pulling the sub-board, which is very suitable for use in an environment where the density of the sub-board is high and there is no space to directly pull the locking shell.

The left and right sides of the floating shell are installed on the sub-board through the X and Y floating installation mechanisms. The X direction corresponds to the left and right directions, and the Y direction corresponds to the up and down directions. 1. The rear limit block 18 and the connecting column 15 connected between the front and rear limit blocks, the front limit block 16 is fixed on the sub-board by screws 17, and the left and right sides of the floating housing are provided with axes extending along the front and rear directions The floating hole 50, the hole wall of the floating hole is provided with a sidewall channel for the connecting column to be loaded in the X direction, and there are floating gaps in the left and right directions and up and down directions between the floating hole and the connecting column. In this way, when the daughter board is docked with the back board, there may be a problem that the head seat cannot be inserted and the parts are damaged. Item 2-1 in Fig. 7 represents the socket housing.

The fiber optic backplane includes a first fiber optic backplane unit 45 and a second fiber optic backplane unit 46, the first fiber optic backplane unit includes a first backplane base 43, and the first backplane base is provided with four for transporting along the front-to-rear direction. A first optical fiber ribbon 44 for optical signals; a second optical fiber backplane unit 46 includes a second optical fiber ribbon 42, and four second optical fiber ribbons 41 for transporting optical signals in the front-to-back direction are arranged on the second backplane base, the first Both the optical fiber ribbon and the second optical fiber ribbon are connected to the sub-board plug, and the first and second backplane substrates are both made of flexible materials. The first backplane base 43 is provided with a first optical fiber ribbon 47 that runs through the first backplane base along the thickness direction of the first backplane base, and the left end of the first optical fiber ribbon 47 extends to the left side of the first backplane base , the optical fibers in each of the first optical fiber ribbons cross and recombine on the right side of the first backplane through the groove, wherein two first optical fiber ribbons are combined into one strand on the left side of the first backplane through the groove, and the first backplane through the groove The right side of the groove is crossed and reorganized, and the first optical fiber ribbon 47 is located in the middle left of the first backplane base 43 . The second optical fiber ribbon 42 is provided with a second backplane through-groove 48 that runs through the second optical fiber ribbon 42 along the thickness direction of the second backplane base, and the second backplane through-groove 48 is located in the middle left of the second backplane base , the right end of the second backplane slot 48 extends to the right side of the second backplane base, and the optical fibers in each second optical fiber ribbon 41 cross and recombine on the right side of the second backplane slot. The second backplane matrix includes a second backplane right section 42-1, a second backplane left section 42-2, and a second backplane connected between the second backplane left section and the second backplane right section. In the middle section of the backplane, the incoming end 41-1 of the second optical fiber ribbon is set on the left section 42-2 of the second backplane, and the outgoing end 41-2 of the second optical fiber ribbon is set on the right section 42 of the second backplane -1 above; the first backplane matrix includes the right section 43-1 of the first backplane, the left section 43-2 of the first backplane, and the In the middle section of the first backplane, the entry end 44-1 of the first optical fiber ribbon is set on the left section 43-2 of the first backplane, and the outgoing end 44-2 of the first optical fiber ribbon is set on the first backplane On the right side section 43-1, the middle section of the second backboard is passed through the first backboard through the groove, the first backboard middle section is passed through the second backboard through the groove, and the right side of the second backboard It is above the right section of the first backplane, and the left section of the second backplane is below the left section of the first backplane, so that the entry end of the second optical fiber ribbon is located below the entry end of the first optical fiber ribbon, The outlet end of the second optical fiber is located above the outlet end of the first optical fiber ribbon, so that the optical fibers between the optical fiber units on the backplane are crossed in the up and down direction.

The manufacturing process of the optical fiber backplane unit in the above-mentioned optical fiber backplane is as follows: firstly, a substrate with pressure sensitivity is provided. The pressure sensitivity can be an attribute of the substrate itself. For example, the substrate is a transparent film structure formed after the glue is cured. The adhesive film structure is pressure-sensitive; pressure-sensitive can also be coated with a pressure-sensitive adhesive layer on the substrate to make the substrate pressure-sensitive, for example, the substrate is a substrate tape with a pressure-sensitive adhesive layer. Now take the substrate tape 49 as an example to illustrate the fabrication of the optical fiber backplane unit. The optical fiber ribbon is arranged on the surface of the substrate tape, and the optical fibers of the optical fiber ribbon are cross-recombined on the surface of the substrate tape. The cross-recombined optical fibers are combined to form a complete Optical fiber ribbon or part of the optical fiber ribbon, and then coat the encapsulation layer on the substrate tape and the surface of the optical fiber to protect the optical fiber, that is to say, the backplane matrix in the present invention is composed of the substrate tape and the encapsulation layer, and finally cut on one side of the backplane matrix Out of the backplane through the groove, the second optical fiber backplane unit can be made with the same arrangement. The manufacturing process of the optical fiber backplane is as follows: the slotted parts of the first and second optical fiber backplane units are inserted and combined as shown in Figure 11: after the two optical fiber backplane units are inserted and combined, the second optical fiber backplane base Fold along the direction A in Figure 11 until the outlet ends on the second fiber optic backplane unit are directly above the inlet ends on the first fiber optic backplane unit, and the wire inlet ends on the second fiber optic backplane unit are respectively It is located directly below each incoming line end on the first optical fiber backplane unit, and realizes interlacing between rows of optical fiber ribbons.

During use, the sub-board plug 3 is installed on the sub-board 4, and the backplane socket 2 matched with it is installed on the backplane 1, and the operator can hold the sub-board so that the sub-board plug and the backplane socket are mated, X, The Y-direction floating installation mechanism can prevent the problem that the sub-board plug and the backplane socket cannot be plugged in. After the sub-board plug and the backplane socket are mated, the locking hook on the backplane socket first hooks the plug component shell. The locking groove, the lateral pressing part on the locking shell presses the locking hook, and the daughterboard plug and the backplane socket are locked. As the daughterboard continues to move forward, the floating shell pushes the elastic push rod, and the elastic push The rod continues to move forward with the housing of the plug part. Gradually, the bearing part on the socket housing and the elastic push rod is pushed to make the overhanging end of the push rod body elastically deform downward. Under the action of the socket housing, The housing stop structure on the push rod body will be completely disengaged from the floating housing, the sub-board continues to move forward, only the floating housing moves forward, the sub-board is installed in place, and the floating housing is also blocked by the socket housing. During the floating process of the floating housing, the housing of the plug part will move backward under the action of the first spring until the locking hook works again. When the sub-board plug needs to be separated from the backplane socket, the sub-board is pulled by hand, and the floating housing moves backward. After the barb on the floating housing hooks the rear side wall of the locking housing, the floating housing can drive the lock. The housing is moved backward to realize unlocking. In other embodiments of the optical fiber connector: the optical fiber connector can also be a backplane socket adapted to the plug of the sub-board, and of course the optical fiber connector can also be used in other environments other than the cabinet; the plug of the sub-board can also be an LC plug; Of course, the Z-direction floating and X-Y direction floating installation mechanisms in the above-mentioned embodiments can also be applied to electrical connectors. At this time, the sub-board plug can be an electric plug; the deformation direction of the overhanging end of the push rod body can also be left-right direction, at this time the push rod body can be arranged on the side of the plug part housing; The stop structure of the time housing can be formed by the stepped surface of the ladder structure; the limit seat can also adopt a single structure. The second backplane matrix made of flexible material facilitates the manufacture of the optical signal transmission device, and at the same time the first and second backplane substrates can be bent, so that the signal transmission device can be applied to various working angles; the first backplane The slot is located in the middle left of the first backplane base, and the cross-recombination of optical fibers occurs on the right side of the first backplane slot, which helps to reduce the size of the backplane base and facilitates the miniaturization of optical signal transmission devices. Chemical production; the second backplane substrate is provided with a second backplane through groove, so that the first and second backplane substrates can realize the projection overlap in the up and down direction, so as to arrange more optical fiber ribbons in a limited space. In other embodiments of the optical signal transmission device: the second backplane groove on the second backplane base body may not be provided, and at this time, the two first and second optical fiber ribbons on the right side may not be provided; A backplane slot may not extend to the left side of the first backplane base; the number of optical fiber ribbons on each optical fiber backplane unit can also be set according to needs, such as two, three or other number; the first backplane matrix can also be made of rigid material; the second backplane matrix can also be made of rigid material; when the size of the backplane matrix is larger, the backplane through groove can also be arranged on the backplane matrix in the middle or center-right position.

Claims (5)

1. Optical cable assembly, including optical fiber connector and optical fiber backplane, the optical fiber backplane includes a first optical fiber backplane unit and a second optical fiber backplane unit, the first optical fiber backplane unit includes a first backplane base, a first backplane base The first optical fiber ribbon connected to the optical fiber connector for transmitting optical signals in the front-rear direction is arranged on the upper part, the second optical fiber backplane unit includes a second backplane base, and the second backplane base is provided with a The second optical fiber ribbon connected to the device is characterized in that: the first backplane base is provided with a first backplane through groove penetrating through the first backplane base along the thickness direction of the first backplane base, and the second backplane base It includes the second backplane right side section above the first backplane base for the outlet end of the second optical fiber, and the second backplane under the first backplane base for the entry end of the second optical fiber. The left section of the backplane and the second middle section of the backplane connected between the left section of the second backplane and the right section of the second backplane, the middle section of the second backplane passes through the first backplane In the groove, the wire-entry end of the second optical fiber ribbon is located below the wire-entry end of the first optical fiber ribbon, and the wire-out end of the second optical fiber is located above the wire-out end of the first optical fiber ribbon. 2. The optical cable assembly according to claim 1, wherein the second backplane base is made of flexible material. 3. The optical cable assembly according to claim 1, characterized in that: there are at least two first optical fiber ribbons, and the optical fibers in each first optical fiber ribbon cross and reorganize on the right side of the first backplane through the groove, the first The backplane through groove is located in the middle left of the first backplane base. 4. The optical cable assembly according to any one of claims 1-3, characterized in that: the left end of the first backplane through the groove extends to the left side of the first backplane base, and the second backplane base A second backplane penetration groove extending through the right end of the second backplane base along the thickness direction of the second backplane base to the right side of the second backplane base is provided. The first backplane base includes a The right section of the first backplane below the right section of the second backplane for the outlet end of the second optical fiber ribbon, and the entry end of the second optical fiber ribbon above the left section of the second backplane The left side section of the first backboard and the middle section of the first backboard connected between the left side section of the first backboard and the right side section of the first backboard are arranged, and the middle section of the first backboard passes through the The second backplane passes through the groove. 5. The optical cable assembly according to claim 4, wherein the first backplane base is made of flexible material.