WO2013106495A1 - Cable assembly - Google Patents

Cable assembly Download PDF

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Publication number
WO2013106495A1
WO2013106495A1 PCT/US2013/020919 US2013020919W WO2013106495A1 WO 2013106495 A1 WO2013106495 A1 WO 2013106495A1 US 2013020919 W US2013020919 W US 2013020919W WO 2013106495 A1 WO2013106495 A1 WO 2013106495A1
Authority
WO
WIPO (PCT)
Prior art keywords
cable assembly
separator
flat cable
connectors
cable
Prior art date
Application number
PCT/US2013/020919
Other languages
French (fr)
Inventor
Andrew Li
Qilin Chen
Allen Wang
Original Assignee
3M Innovative Properties Company
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 3M Innovative Properties Company filed Critical 3M Innovative Properties Company
Publication of WO2013106495A1 publication Critical patent/WO2013106495A1/en

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Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/66Structural association with built-in electrical component
    • H01R13/665Structural association with built-in electrical component with built-in electronic circuit
    • H01R13/6658Structural association with built-in electrical component with built-in electronic circuit on printed circuit board
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/46Bases; Cases
    • H01R13/502Bases; Cases composed of different pieces
    • H01R13/512Bases; Cases composed of different pieces assembled by screw or screws

Definitions

  • the present invention generally relates to a cable assembly, and in particular, to a cable assembly with locking function.
  • signal transmission units such as electric connectors and cables
  • signal transmission units in the assembly should be made as flexible as possible.
  • cable routing and soldering to the terminals directly become kind of difficulty during the manufacturing process.
  • PCB printed circuit board
  • assembly for these signal transmission units should be robust in the course of operation, so that an outer shell for cable protection should be considered as a preferable style.
  • the assembly of signal transmission units and cables electrically connected thereto is protected by external rigid accessories, such as rigid cover, metal shell, etc..
  • rigid cover such as rigid cover, metal shell, etc.
  • Backplane connector is widely used in the telecom interconnection system.
  • cable assembly for backplane connectors is an important style among the equipments in the system.
  • arrangement of two or more connectors placed in parallel is considered as a solution to provide a developed compaction of array of connectors so as to accelerate the signal transmission.
  • US20100203754A1 discloses a cable assembly with latching mechanism, wherein the latching mechanism includes a pulling member and a latching member cooperated with the pulling member, and an interconnection between the pulling member and the latching member is reliable. However, it seems that there are no PCB and protection shell for the cable assembly.
  • US20090301761A1 discloses a cable assembly having connector with interior printed circuit board.
  • the cable assembly includes an insulated housing; a plurality of contacts therein, each contact having a tail extending beyond rear surface of housing; and, a printed circuit board having front portion and opposite rear portion.
  • the tail portions of the contacts are soldered on front portion of printed circuit board; and the conductive pads of printed circuit board are separated into at least two groups that connect two kinds of cables.
  • a cover is mold over the rear portion of the connector and the front portion of the cable.
  • this disclosure it is only suitably to connect one kind of single connector with the corresponding cable through the printed circuit board.
  • this cable assembly does not show any disclosure of the locking features.
  • US006165017A introduces a cable end connector.
  • the cable end connector has a locking device for securing a metal shielding to an insulated housing and preventing the engaging components from being loosened.
  • the metal shielding includes upper and lower shells.
  • the metal shielding has two locking slots for engaging with the corresponding locking elements and ensuring that the upper and lower shells are securely assembled to the insulated housing.
  • this latching mechanism is difficulty in the operation, thereby causing unnecessary cost in the manufacture and assembly.
  • such connector may be not useful in the high-speed signal transmission due to absence of the PCB and cables.
  • the present invention has been made to overcome or alleviate at least one aspect of the above mentioned disadvantages existing in the conventional technical solutions.
  • the present invention intents to provide a cable assembly capable of providing high density signal transmission.
  • the cable assembly comprises:
  • each of the at least two connectors including an insulated housing and a plurality of contacts received therein, each contact having a tail portion extending beyond a bottom wall of the insulated housing;
  • a printed circuit board having a front portion and an opposite rear portion, with a plurality of conductive tracing holes arranged on the front portion and a plurality of conductive pads arranged on the opposite rear portion; wherein the plurality of conductive tracing holes are accommodated therein with the tail portions of the plurality of contacts, respectively;
  • a flat cable including a number of electrical cores, wherein these electrical cores of the flat cable are electrically attached to the plurality of conductive pads, respectively;
  • a shielding shell defining an inner space therein, wherein at least portions of the at least two connectors, the printed circuit board, at least a portion of the at least one separator, and at least a portion of the flat cable are accommodated in the inner space, wherein the shielding shell is provided with a second locking member being engaged with the first locking member of the separator.
  • the at least two connectors are parallel to each other.
  • the insulated housing of each of the two connectors is in an L shape, and the insulated housing includes an elongated part and a stepped part downwardly protruding from frontal portion of the elongated part, wherein the tail portions of the contacts are extended beyond stepped wall of the stepped part of the insulated housing.
  • the separator is in an L shape and includes an elongated body and a step body downwardly protruding from frontal portion of the elongated body, wherein stepped walls of the stepped parts of the insulated housings and step wall of the step body of the separator are resisted against end side of the printed circuit board so as to locate the at least two connectors and the separator in position, wherein the first locking member of the separator is extruded beyond rear walls of the insulated housings.
  • the first locking member is a through hole laterally through rear end of the elongated body
  • the second locking member is a lug formed on the shielding shell and being inserted into the through hole.
  • the shielding shell further comprises first and second half shielding shell parts
  • the second locking member is provided at least at one of the first and second half shielding shell parts.
  • first and second half shielding shell parts are firmly engaged with each other by at least one first fastening element, for example, screws.
  • the cable assembly further comprises an outer shell defining a receiving space therein, and the flat cable is accommodated in the receiving space; wherein latch mechanism is provided at top wall of the outer shell and adapted to latch the cable assembly into the peripheral device.
  • the latch mechanism comprises an elongated U-shaped groove formed in top wall of the outer shell, a cantilever arm suspended in the U-shaped groove, and, a latch element provided at the cantilever arm; wherein the latch element of the latch mechanism is adapted for being engaged with a corresponding latch element of the peripheral device to achieve a latch function.
  • the cantilever arm further comprises an end area formed at the free end thereof, and, the latch element of the latch mechanism is disengaged from the corresponding latch element of the peripheral device so as to achieve a release function once the end area is pressed down.
  • the shielding shell further comprises an engaged part at rear end thereof
  • the outer shell further comprises an engaging part at frontal end thereof and adapted to be engaged with the engaged part
  • the engagement between the engaged part and the engaging part is fastened by at least one second fastening element, for example, screws.
  • the flat cable is fixedly received in the receiving space of the outer shell by at least one second faster.
  • the flat cable comprise the number of electrical cores and an outer envelope enveloped at the outside of these electrical cores.
  • the electrical cores of the flat cable form one or more pairs of conductors extending along a length, L, of the flat cable and spaced apart from each other along a width, w, of the flat cable.
  • Each of the one or more pairs of conductors comprises a first conductor and a second conductor, and each of the first and second conductors comprises a conductor wire surrounded by a conductor insulation.
  • the outer envelope of the flat cable further comprises first and second shielding films disposed on opposite sides of the flat cable.
  • the first and second shielding films includes cover portions and pinched portions arranged such that, in transverse cross section, the cover portions of the first and second shielding films in combination substantially surround each of the first and second conductors, and the pinched portions of the first and second shielding films in combination form at least one pinched portion of the flat cable between the first and second conductors.
  • a maximum separation between the cover portions of the first and second shielding films is D, and, a minimum separation between the pinched portions of the first and second shielding films is d, d/D is less than about 0.5.
  • a cable assembly with a compact array of the connectors within a limited space is provided.
  • Such cable assembly can comprises two or more connectors and each connector comprises a plurality of contacts, which contacts are electrically connected to a flat cable having a number of electrical cores via the conductive tracing holes and conductive pads on the printed circuit board, thus, high density signal transmission is achieved via this cable assembly.
  • such cable assembly is protected from being damages from environments due to its accessories like the shielding shell surrounding the electrical components.
  • this cable assembly according to the present invention introduces a specific structure for assembling the separated components together into a shielding shell by adopting mechanical measure only, so as to make the assembling process much more convenient and simpler. That is, the present invention allows assembly of the cables to be performed in a convenient, fast, easy and reliable manner only by the simple mechanical design.
  • outer shell of the cable assembly is integrated with a conveniently and practically mechanical latch structure for releasablly locking the cable assembly to a peripheral device to be connected to the cable assembly for signal transmission purpose in a fixed connection.
  • a cantilever structure which having a locking element is presented to provide reliable fixed connection of the cable assembly with the peripheral device.
  • integrated latch mechanism in the outer shell of the cable assembly is achieved in the simple manufacturing process. Additionally, such design effectively reduces the cost.
  • Fig. 1 is an exploded schematic view of a cable assembly with locking function according to a preferred embodiment of the present invention
  • Fig. 2 is another exploded schematic view of the cable assembly with locking function according to the preferred embodiment of the present invention.
  • Fig. 3 is a schematic view of one connector in the cable assembly with locking function according to the preferred embodiment of the present invention.
  • Fig. 4 is a schematic view of a printed circuit board in the cable assembly with locking function according to the preferred embodiment of the present invention.
  • Fig. 5 is a schematic view of a separator in the cable assembly with locking function according to the preferred embodiment of the present invention.
  • Fig. 6 is a schematic view of a first half shielding shell part of a shielding shell in the cable assembly with locking function according to the preferred embodiment of the present invention
  • Fig. 7 is a schematic view of the partially assembled cable assembly according to the preferred embodiment of the present invention.
  • Fig. 8 is another schematic view of the partially assembled cable assembly according to the preferred embodiment of the present invention.
  • Fig. 9 is a schematic view of the cable assembly with locking function according to the preferred embodiment of the present invention, without a second half shielding shell part and an outer shell;
  • Fig. 10 is a schematic view of the cable assembly with locking function according to the preferred embodiment of the present invention, without an outer shell, to illustrate engagement between the first and second half shielding shell parts;
  • Fig. 1 1 is a schematic view of the completely assembled cable assembly according to the preferred embodiment of the present invention.
  • Fig. 12 is a schematic view of application of the completely assembled cable assembly according to the preferred embodiment of the present invention into the peripheral device;
  • Fig. 13 is a sectional view of application of the completely assembled cable assembly according to the preferred embodiment of the present invention into the corresponding device shown in Fig. 12 along the line P-P in Fig. 12, to illustrate the latch function achieved between the latch element of the cable assembly and a corresponding latch element of the peripheral device;
  • Fig. 14 is another schematic view of the cable assembly with locking function according to an alternative embodiment of the present invention in a partially assembled manner, in which several separators are located respectively among the two neighboring connectors;
  • Fig. 15 is another further schematic view of the cable assembly with locking function according to another alternative embodiment of the present invention in a partially assembled manner, in which only one separator is located among the connectors;
  • Fig. 16 is a perspective view of a shielded electrical cable in the cable assembly according to a preferred embodiment of the present invention.
  • Fig. 17 is transverse cross sectional view of cables in the cable assembly according to the preferred embodiment of the present invention.
  • a cable assembly 1000 with locking function according to one preferred embodiment of the present invention is provided for being in electrical connection with a peripheral device 2000 (see Fig. 12).
  • the cable assembly 1000 with locking function at least comprises two connectors 1, a printed circuit board 2, a flat cable 4, a separator 3, and a shielding shell 5.
  • the peripheral device 2000 is to be electrically connected with the cable assembly 1000 via the connectors 1 for signal transmission purpose therebetween.
  • each connector 1 includes an insulated housing 10 and a plurality of contacts 11 received therein.
  • the housing 10 is a lengthwise insulated housing which has a top wall 12, a bottom wall 13, a pair of side walls 14, 15, and an interior space defined by these walls.
  • the plurality of contacts 11 are independently accommodated in the interior space by barriers. As shown in Fig. 3, each contact 11 has a tail portion 110 extending beyond the bottom wall 13 of the insulated housing 10.
  • the insulated housing 10 of each of the two connectors 1 is in an L shape, and the insulated housing 10 includes an elongated part 130 and a stepped part 131 downwardly protruding from frontal portion of the elongated part 130.
  • a stepped wall 1310 is formed in -parallel with a frontal wall 16 of the housing 10, and the tail portions 110 of the contacts 11 are extended beyond the stepped wall 1310 of the stepped part 130 of the insulated housing 10.
  • the printed circuit board 2 includes a substrate 20, a plurality of conductive tracing holes 210, and a plurality of conductive pads 220, 221, 222, 223.
  • the substrate 20 of the printed circuit board 2 has a front portion 21 and an opposite rear portion 22, and the plurality of conductive tracing holes 210 are arranged on the front portion 21 of the substrate 20 and the plurality of conductive pads 220, 221, 222, 223 are arranged on the opposite rear portion 22 of the substrate 20.
  • the tail portions 110 of the plurality of contacts 11 are accommodated in the plurality of conductive tracing holes 210, respectively.
  • a pair of gaps 224, 225 are formed respectively at both side of the opposite rear portion 22, in order for passing the fasteners, which will be described in the below, therethrough.
  • the flat cable 4 for example a Twinax Cable, includes a number of electrical cores 41, and an outer envelope 43 enveloped at the outside of these electrical cores 41 , so as to achieve the cable 4 in a flat manner.
  • terminal ends of these electrical cores 41 of the flat cable 4 are unwrapped and are electrically attached to the plurality of conductive pads 220, 221 , 222, 223, respectively.
  • the electrical cores 41 of the flat cable 4 form one or more pairs of conductors 410 extending along a length, L, of the flat cable 4 and spaced apart from each other along a width, w, of the flat cable 4.
  • Each of the one or more pairs of conductors 410 comprises a first conductor 412 and a second conductor 414, and each of the first and second conductors 412, 414 comprises a conductor wire 410a surrounded by a conductor insulation 410b.
  • the outer envelope 43 of the flat cable 4 further comprises first and second shielding films 430 disposed on opposite sides of the flat cable 4.
  • the first and second shielding films 430 includes cover portions 430a and pinched portions 430b arranged such that, in transverse cross section, the cover portions 430a of the first and second shielding films 430 in combination substantially surround each of the first and second conductors 430, and the pinched portions 430b of the first and second shielding films 430 in combination form at least one pinched portion of the flat cable 4 between the first and second conductors 412, 414.
  • the flat cable 4 may optionally include an adhesive layer 42 disposed between first and second shield films 430.
  • the adhesive layer 42 bonds at least the pinched portions 430b of the first and second shield films 430 to each other to form the outer envelope 43 of the flat cable 4.
  • the separator 3 is disposed between the two connectors 1 and provided with a first locking member 330 at the tail portion 33 thereof.
  • a first locking member 330 at the tail portion 33 thereof.
  • the separator 3 is in an L shape and includes an elongated body 3a and a step body 3b downwardly protruding from frontal portion of the elongated body 3a.
  • the separator 3 has first bottom wall 31 , second bottom wall 32 stepped from the first bottom wall 31 , a pair of side walls 34, 35, and a step wall 30 formed perpendicularly to the first bottom wall 31 and second bottom wall 32.
  • the stepped walls 1310 of the insulated housings 10 of the two connectors 1 and the step wall 30 of the step body 3b of the separator 3 are resisted against end side of the printed circuit board 2 so as to locate the two connectors 1 and the separator 3 in position.
  • the separator 3 may functions as a locking unit by which the separated components, for example, the connectors 1, the PCB 2, the flat cable 4, etc. are assembled together into the shielding shell 5 so as to form a firmly mechanical structure for the cable assembly.
  • Location and number of the separator may vary in different situations. That is, in the case that a plurality of connectors (more than two) are arranged, only one separator may be placed among these connectors; or, several separators are optionally placed in any two neighboring connectors.
  • one separator 3 is placed between the two connectors 1.
  • several separators are located respectively among every two neighboring connectors.
  • only one separator is located among these (more than two) connectors.
  • the shielding shell 5 is formed with an inner space therein, wherein at least portions of the two connectors 1 , the printed circuit board 2, at least a portion of the separator 3, and at least a portion of the flat cable 4 are accommodated in the inner space, wherein the shielding shell 5 is provided with a second locking member 5130 being engaged with the first locking member 330 of the separator 3.
  • the shielding shell 5 is preferably made by metal material.
  • the first locking member 330 located at the tail portion 33 of the separator 3 is extruded beyond rear walls of the insulated housings 10 of the two connectors 1.
  • the first locking member 330 is embodied as a through hole 330 laterally through rear end of the elongated body 3a (that is, the tail portion 33 of the separator 3), and the second locking member 5130 is embodied as a lug 5130 formed on the shielding shell 5.
  • the lug 5130 is inserted into the through hole 330 when assembled.
  • the first locking member 330 may be formed as a recessed portion on the elongated body 3a (that is, the tail portion 33 of the separator 3), and in that case, the second locking member 5130 (for example, a protrusion) is fitted into the recessed portion so as to achieve a locking function.
  • the shielding shell 5 may further comprises first and second half shielding shell parts 51, 52.
  • the first half shielding shell part 51 has a top wall 510, a bottom wall 511, a side wall 512, and a first interior defined by these walls 510, 511, 512.
  • the first interior of the first half shielding shell part 51 is divided by a first middle partition 513.
  • the second locking member 5130 is formed at the frontal portion of the first half shielding shell part 51, i.e., at the frontal of the first middle partition 513. Through orifices 5131, 5132, 5133 are laterally formed in the middle of the first half shielding shell part 51.
  • Engaged walls 514, 515, 516, and a groove 517 defined by these walls 514, 515, 516 are formed at the rear portion of the first half shielding shell part 51, i.e., at the rear of the first middle partition 513.
  • Through orifices 5140, 5160 are longitudinally formed in the engaged walls 514, 516.
  • the second half shielding shell part 52 has a generally similar and symmetrical configuration with that of the first half shielding shell part 51, except the second locking member 5130 in the preferred embodiment.
  • the second half shielding shell part 52 has a top wall 520, a bottom wall 521, a side wall 522, and a second interior defined by these walls 520, 521, 522.
  • the second interior of the second half shielding shell part 52 is divided by a second middle partition 523. Through orifices 5231, 5232, 5233 are laterally formed in the middle of the second half shielding shell part 51.
  • Engaged walls 524, 525, 526, and a groove 527 defined by these walls 524, 525, 526 are formed at the rear portion of the second half shielding shell part 52, i.e., at the rear of the middle partition 523.
  • Through orifices 5240, 5260 are longitudinally formed in the engaged walls 524, 526.
  • the first and second half shielding shell parts 51, 52 are firmly engaged with each other by respectively fastening a plurality of first fastening elements 71 (for example, three first screws 71 as shown) to these through orifices 5131, 5132, 5133, 5231, 5232, 5233, correspondingly.
  • the second locking member 5130 may be provided at least at one of the first and second half shielding shell parts 51, 52, or be provided at both of the parts 51, 52.
  • the second locking member 5130 (the lug 5530 in the preferred embodiment) is laterally extended from inner side wall in the first half shielding shell part 51.
  • the first locking member 330 is embodied as the through hole, such that both of the two second locking members 5130 may be inserted into the through hole (first locking member) 330 so as to achieve a locking function.
  • the cable assembly 1000 further comprises an outer shell 6 for protection of the flat cable 4 against external forces.
  • the outer shell 6 has top wall 60, bottom wall 61, a pair of side walls 62, 63, and a receiving space 64 defined by these walls 60, 61, 62, 63.
  • the flat cable 4 is received in the receiving space 64.
  • Through orifices 600, 601 are longitudinally formed at the frontal portion of the top wall 60.
  • through orifices 610, 611 are longitudinally formed at the frontal portion of the bottom wall 61.
  • the outer shell 6 is preferably made of plastic material.
  • a latch mechanism 8 is provided at top wall 60 of the outer shell 6 and adapted to latch the cable assembly 1000 into a peripheral device 2000.
  • the latch mechanism 8 comprises an elongated U-shaped groove 603, 604 formed in the top wall 60 of the outer shell 6, a cantilever arm 605 suspended in the U-shaped groove 603, 604, and, a latch element 6050 provided at the cantilever arm 605.
  • the latch element 6050 of the latch mechanism 8 is adapted for being engaged with a corresponding latch element 2050 of the peripheral device 2000 to achieve a latch function.
  • the cantilever arm 605 further comprises an end area 6051 formed at the free end thereof.
  • the latch element 6050 of the latch mechanism 8 is engaged from the corresponding latch element 2050 of the peripheral device 2000 so as to achieve a latch function once the cable assembly 1000 is fitted into the corresponding device 2000.
  • the latch element 6050 of the latch mechanism 8 is disengaged from the corresponding latch element 2050 of the peripheral device 2000 so as to achieve a release function once the end area 6051 of the cantilever arm 605 is pressed down.
  • the shielding shell 5 further comprises an engaged part 530 at rear end thereof
  • the outer shell 6 further comprises an engaging part 630 at frontal end thereof and adapted to be engaged with the engaged part 530
  • the engagement between the engaged part 530 and the engaging part 630 is fastened by the second fastening element like screws 72.
  • the flat cable 4 is fixedly received in the receiving space 64 of the outer shell 6 by these second screws 72.
  • Figs. 1-2 and 7-11 the following description refers to the assembling procedures of the cable assembly 1000 with locking function.
  • the latch element 6050 of the latch mechanism 8 When the cable assembly 1000 with locking function is inserted into the peripheral device 2000, the latch element 6050 of the latch mechanism 8 is engaged with the corresponding latch element 2050 of the peripheral device 2000 so as to latch the cable assembly 1000 to the peripheral device 2000. Contrariwise, when the once said end area (6051) of the cantilever arm 605 of the latch mechanism 8 is pressed down, the latch element 6050 is disengaged from the corresponding latch element 2050 of the peripheral device 2000 so as to easily release the cable assembly 1000 from the peripheral device 2000.
  • a cable assembly with a compact array of the connectors within a limited space is provided.
  • Such cable assembly can comprises two or more connectors and each connector comprises a plurality of contacts, which contacts are electrically connected to a flat cable having a number of electrical cores via the conductive tracing holes and conductive pads on the printed circuit board, thus, high density signal transmission is achieved via this cable assembly.
  • such cable assembly is protected from being damages from environments due to its accessories like the shielding shell surrounding the electrical components.
  • this cable assembly is suitably for providing high density signal transmission.
  • this cable assembly according to the present invention introduces a specific structure for assembling the separated components together into a shielding shell by adopting mechanical measure only, so as to make the assembling process much more convenient and simpler.
  • the present invention allows assembly of the cables to be performed in a convenient, fast, easy and reliable manner only by the simple mechanical design. Furthermore, in this cable assembly according to the present invention, outer shell of the cable assembly is integrated with a conveniently and practically mechanical latch structure for releasably locking the cable assembly to a peripheral device for signal transmission purpose in a fixed connection. Particularly, according to the present invention, a cantilever structure which having a locking element is presented to provide reliable fixed connection of the cable assembly with the peripheral device. Moreover, integrated latch mechanism in the outer shell of the cable assembly is achieved in the simple manufacturing process. Additionally, such design effectively reduces the cost.
  • Item 1 is a cable assembly, comprising:
  • each of said at least two connectors including an insulated housing (10) and a plurality of contacts (11) received therein, each contact having a tail portion (110) extending beyond a bottom wall (13) of said insulated housing;
  • a printed circuit board (2) having a front portion (21) and an opposite rear portion (22), with a plurality of conductive tracing holes (210) arranged on said front portion (21) and a plurality of conductive pads (220, 221, 222, 223) arranged on said opposite rear portion (22); wherein the plurality of conductive tracing holes are accommodated therein with said tail portions of the plurality of contacts, respectively;
  • a flat cable (4) including a number of electrical cores (41), wherein these electrical cores of said flat cable are electrically attached to the plurality of conductive pads, respectively;
  • a shielding shell (5) defining an inner space therein, wherein at least portions of said at least two connectors, said printed circuit board, at least a portion of said at least one separator (3), and at least a portion of said flat cable are accommodated in said inner space, wherein said shielding shell (5) is provided with a second locking member (5130) being engaged with said first locking member of said separator.
  • Item 2 is the cable assembly according to item 1, wherein said at least two connectors (1) are parallel to each other.
  • Item 3 is the cable assembly according to item 1, wherein said insulated housing (10) of each of said at least two connectors is in an L shape, and said insulated housing (10) includes an elongated part (130) and a stepped part (131) downwardly protruding from frontal portion of said elongated part, wherein said tail portions (110) of said contacts are extended beyond stepped wall (1310) of said stepped part of said insulated housing.
  • Item 4 is the cable assembly according to item 3, wherein said separator (3) is in an L shape and includes an elongated body (3 a) and a step body (3b) downwardly protruding from frontal portion of said elongated body, wherein stepped walls (1310) of said stepped parts (131) of said insulated housings (10) and step wall (30) of said step body (3b) of said separator (3) are resisted against end side of said printed circuit board (2) so as to locate said at least two connectors (1) and said separator (3) in position, wherein said first locking member (330) of said separator (3) is extruded beyond rear walls of said insulated housings (10).
  • Item 5 is the cable assembly according to item 1, wherein said separator (3) is in an L shape and includes an elongated body (3 a), said first locking member is a through hole (330) laterally through rear end of said elongated body (3a), and said second locking member is a lug (5130) formed on said shielding shell (5) and being inserted into the through hole (330).
  • Item 6 is the cable assembly according to item 1, wherein said shielding shell (5) further comprises first and second half shielding shell parts (51, 52), and said second locking member (5130) is provided at least at one of said first and second half shielding shell parts (51, 52).
  • Item 7 is the cable assembly according to item 6, wherein said first and second half shielding shell parts (51, 52) are firmly engaged with each other by at least one first fastening element (71).
  • Item 8 is the cable assembly according to any one of items 1-7, further comprising an outer shell (6) defining a receiving space (64) therein, and said flat cable (4) is accommodated in said receiving space (64); wherein a latch mechanism (8) is provided at top wall of said outer shell (6) and is adapted to latch said cable assembly into a peripheral device.
  • Item 9 is the cable assembly according to item 8, wherein said latch mechanism (8) comprises an elongated U-shaped groove (603, 604) formed in top wall of said outer shell (6), a cantilever arm (605) suspended in said U-shaped groove (603, 604), and, a latch element (6050) provided at said cantilever arm (605); wherein said latch element (6050) of said latch mechanism (8) is adapted for being engaged with a corresponding latch element of the peripheral device to achieve a latch function.
  • said latch mechanism (8) comprises an elongated U-shaped groove (603, 604) formed in top wall of said outer shell (6), a cantilever arm (605) suspended in said U-shaped groove (603, 604), and, a latch element (6050) provided at said cantilever arm (605); wherein said latch element (6050) of said latch mechanism (8) is adapted for being engaged with a corresponding latch element of the peripheral device to achieve a latch function.
  • Item 10 is the cable assembly according to item 9, wherein said cantilever arm (605) further comprises an end area (6051) formed at the free end thereof, and, said latch element (6050) of said latch mechanism (8) is disengaged from the peripheral latch element of the peripheral device so as to achieve a release function once said end area (6051) is pressed down.
  • Item 11 is the cable assembly according to item 8, wherein said shielding shell (5) further comprises an engaged part (530) at rear end thereof, said outer shell (6) further comprises an engaging part (630) at frontal end thereof and adapted to be engaged with said engaged part (530), and the engagement between said engaged part (530) and said engaging part (630) is fastened by at least one second fastening element (72).
  • Item 12 is the cable assembly according to item 8, wherein said flat cable (4) are fixedly accommodated in said receiving space (64) of said outer shell (6) by at least one second fastening element (72).
  • Item 13 is the cable assembly according to item 1 , wherein said electrical cores (41) of said flat cable (4) form one or more pairs of conductors (410) extending along a length, L, of said flat cable (4) and spaced apart from each other along a width, w, of said flat cable (4), each of said one or more pairs of conductors (410) comprising a first conductor (412) and a second conductor (414), each of said first and second conductors (412, 414) comprising a conductor wire (410a) surrounded by a conductor insulation (410b); and
  • said flat cable (4) further comprises first and second shielding films (430) disposed on opposite sides of said flat cable (4), said first and second shielding films (430) including cover portions (430a) and pinched portions (430b) arranged such that, in transverse cross section, said cover portions (430a) of said first and second shielding films (430) in combination substantially surround each of said first and second conductors (430), and said pinched portions (430b) of said first and second shielding films (430) in combination form at least one pinched portion of said flat cable (4) between said first and second conductors (412, 414), a maximum separation between said cover portions (430a) of said first and second shielding films (430) being D, a minimum separation between said pinched portions (430b) of said first and second shielding films (430) being d, d/D being less than about 0.5.
  • first and second shielding films (430) including cover portions (430a) and pinched portions (430b) arranged such that, in transverse cross section, said cover portions (430

Abstract

The present invention provides a cable assembly with locking function. The cable assembly comprises at least two connectors (1) separated by at least one separator (3) having a first locking member (330) thereon, each of said at least two connectors including an insulated housing (10) and a plurality of contacts (11) received therein, each contact having a tail portion (110) extending beyond a bottom wall (13) of said insulated housing; a printed circuit board (2) having a front portion (21) and an opposite rear portion (22), with a plurality of conductive tracing holes (210) arranged on said front portion and a plurality of conductive pads (220, 221, 222, 223) arranged on said opposite rear portion; wherein the plurality of conductive tracing holes are accommodated therein with said tail portions of the plurality of contacts, respectively; a flat cable (4) including a number of electrical cores (41), wherein these electrical cores of said flat cable are electrically attached to the plurality of conductive pads, respectively;; and a shielding shell (5) formed with an inner space therein, wherein at least portions of said at least two connectors, said printed circuit board, at least a portion of said at least one separator and at least a portion of said flat cable are accommodated in said inner space, wherein said shielding shell (5) is provided with a second locking member (5130) being engaged with said first locking member of said separator.

Description

CABLE ASSEMBLY FIELD OF THE INVENTION
The present invention generally relates to a cable assembly, and in particular, to a cable assembly with locking function. BACKGROUND OF THE INVENTION
In the modern communication, there are more and more requirements to the speed of signal transmission; also, demand on high compaction of signal cable array in a cable assembly becomes higher and higher because of the limited space. Thus, it is a tendency to develop a cable assembly for high-density signal transmission in the future. That is, it is favorable to maximize quantity of the signal transmission units, such as electric connectors and cables electrically connected thereto, in a limited space, so as to provide conditions for the acceleration of signal transmission.
Further, in order to maximize quantity of the signal units in the limited space, signal transmission units, such as electric connectors and cables, in the assembly should be made as flexible as possible. Usually, due to concentration of terminal layout, cable routing and soldering to the terminals directly become kind of difficulty during the manufacturing process. However, if a printed circuit board (PCB) is added between the connectors and cables, assembly would be more flexible.
On the other hand, for ensuring the stabilization of signal transmission, assembly for these signal transmission units should be robust in the course of operation, so that an outer shell for cable protection should be considered as a preferable style. Usually, the assembly of signal transmission units and cables electrically connected thereto is protected by external rigid accessories, such as rigid cover, metal shell, etc.. Hence, it is a key mechanical technology that how to assemble the separated signal transmission units, cables, and accessories like the outer shell, together. Moreover, it is optimally to firmly fix the assembly with a peripheral equipment or device to be connected to the assembly for signal transmission purpose during the operation.
Backplane connector is widely used in the telecom interconnection system. In order to realize a flexible connection, cable assembly for backplane connectors is an important style among the equipments in the system. Of course, in order to maximize quantity of the signal units in the limited space, generally, arrangement of two or more connectors placed in parallel is considered as a solution to provide a developed compaction of array of connectors so as to accelerate the signal transmission. As the above-mentioned discuss, it is desired to add the printed circuit board to the backplane connector and cable assembly in a compact manner, in order for making the assembly more flexible. Also, as the above-mentioned discussion, it is optimal to provide protection to the connectors and cables, and even protection to the mechanical fixation of the assembly to the peripheral device, by usage of the accessories.
US20100203754A1 discloses a cable assembly with latching mechanism, wherein the latching mechanism includes a pulling member and a latching member cooperated with the pulling member, and an interconnection between the pulling member and the latching member is reliable. However, it seems that there are no PCB and protection shell for the cable assembly.
US20090301761A1 discloses a cable assembly having connector with interior printed circuit board. The cable assembly includes an insulated housing; a plurality of contacts therein, each contact having a tail extending beyond rear surface of housing; and, a printed circuit board having front portion and opposite rear portion. The tail portions of the contacts are soldered on front portion of printed circuit board; and the conductive pads of printed circuit board are separated into at least two groups that connect two kinds of cables. A cover is mold over the rear portion of the connector and the front portion of the cable. However, in this disclosure, it is only suitably to connect one kind of single connector with the corresponding cable through the printed circuit board. Furthermore, this cable assembly does not show any disclosure of the locking features.
US006165017A introduces a cable end connector. The cable end connector has a locking device for securing a metal shielding to an insulated housing and preventing the engaging components from being loosened. The metal shielding includes upper and lower shells. The metal shielding has two locking slots for engaging with the corresponding locking elements and ensuring that the upper and lower shells are securely assembled to the insulated housing. However, this latching mechanism is difficulty in the operation, thereby causing unnecessary cost in the manufacture and assembly. Furthermore, such connector may be not useful in the high-speed signal transmission due to absence of the PCB and cables.
SUMMARY OF THE INVENTION
The present invention has been made to overcome or alleviate at least one aspect of the above mentioned disadvantages existing in the conventional technical solutions.
The present invention intents to provide a cable assembly capable of providing high density signal transmission.
Accordingly, it is an object of the present invention to provide a cable assembly with locking function, which has the compact array of connectors within a limited space.
Accordingly, it is another object of the present invention to provide a cable assembly with locking function, which introduces a structure for assembling the separated components together into a shielding shell by adopting mechanical measure only, so as to make the cable assembling process more convenient and simple.
Accordingly, it is still another object of the present invention to provide a cable assembly with locking function, in which an outer shell of the cable assembly is integrated with a conveniently and practically mechanical latch structure for locking the cable assembly to a peripheral device to be connected to the cable assembly for signal transmission purpose in a fixed connection.
According to an aspect of the present invention, there is provided a cable assembly with locking function. The cable assembly comprises:
at least two connectors placed separated by at least one separator having a first locking member thereon, each of the at least two connectors including an insulated housing and a plurality of contacts received therein, each contact having a tail portion extending beyond a bottom wall of the insulated housing;
a printed circuit board having a front portion and an opposite rear portion, with a plurality of conductive tracing holes arranged on the front portion and a plurality of conductive pads arranged on the opposite rear portion; wherein the plurality of conductive tracing holes are accommodated therein with the tail portions of the plurality of contacts, respectively;
a flat cable including a number of electrical cores, wherein these electrical cores of the flat cable are electrically attached to the plurality of conductive pads, respectively; and
a shielding shell defining an inner space therein, wherein at least portions of the at least two connectors, the printed circuit board, at least a portion of the at least one separator, and at least a portion of the flat cable are accommodated in the inner space, wherein the shielding shell is provided with a second locking member being engaged with the first locking member of the separator. Preferably, the at least two connectors are parallel to each other.
According to one preferred embodiment of the present invention, the insulated housing of each of the two connectors is in an L shape, and the insulated housing includes an elongated part and a stepped part downwardly protruding from frontal portion of the elongated part, wherein the tail portions of the contacts are extended beyond stepped wall of the stepped part of the insulated housing.
According to one preferred embodiment of the present invention, the separator is in an L shape and includes an elongated body and a step body downwardly protruding from frontal portion of the elongated body, wherein stepped walls of the stepped parts of the insulated housings and step wall of the step body of the separator are resisted against end side of the printed circuit board so as to locate the at least two connectors and the separator in position, wherein the first locking member of the separator is extruded beyond rear walls of the insulated housings.
Specifically, the first locking member is a through hole laterally through rear end of the elongated body, and the second locking member is a lug formed on the shielding shell and being inserted into the through hole. According to one preferred embodiment of the present invention, the shielding shell further comprises first and second half shielding shell parts, and the second locking member is provided at least at one of the first and second half shielding shell parts.
In particular, the first and second half shielding shell parts are firmly engaged with each other by at least one first fastening element, for example, screws.
Moreover, the cable assembly further comprises an outer shell defining a receiving space therein, and the flat cable is accommodated in the receiving space; wherein latch mechanism is provided at top wall of the outer shell and adapted to latch the cable assembly into the peripheral device.
According to one preferred embodiment of the present invention, the latch mechanism comprises an elongated U-shaped groove formed in top wall of the outer shell, a cantilever arm suspended in the U-shaped groove, and, a latch element provided at the cantilever arm; wherein the latch element of the latch mechanism is adapted for being engaged with a corresponding latch element of the peripheral device to achieve a latch function.
Preferably, the cantilever arm further comprises an end area formed at the free end thereof, and, the latch element of the latch mechanism is disengaged from the corresponding latch element of the peripheral device so as to achieve a release function once the end area is pressed down.
According to one preferred embodiment of the present invention, the shielding shell further comprises an engaged part at rear end thereof, the outer shell further comprises an engaging part at frontal end thereof and adapted to be engaged with the engaged part, and the engagement between the engaged part and the engaging part is fastened by at least one second fastening element, for example, screws.
Specifically, the flat cable is fixedly received in the receiving space of the outer shell by at least one second faster.
More specifically, the flat cable comprise the number of electrical cores and an outer envelope enveloped at the outside of these electrical cores. The electrical cores of the flat cable form one or more pairs of conductors extending along a length, L, of the flat cable and spaced apart from each other along a width, w, of the flat cable. Each of the one or more pairs of conductors comprises a first conductor and a second conductor, and each of the first and second conductors comprises a conductor wire surrounded by a conductor insulation. The outer envelope of the flat cable further comprises first and second shielding films disposed on opposite sides of the flat cable. The first and second shielding films includes cover portions and pinched portions arranged such that, in transverse cross section, the cover portions of the first and second shielding films in combination substantially surround each of the first and second conductors, and the pinched portions of the first and second shielding films in combination form at least one pinched portion of the flat cable between the first and second conductors. A maximum separation between the cover portions of the first and second shielding films is D, and, a minimum separation between the pinched portions of the first and second shielding films is d, d/D is less than about 0.5. As apparent from the above, the present invention at least has following advantages:
For one thing, according to the present invention, a cable assembly with a compact array of the connectors within a limited space is provided. Such cable assembly can comprises two or more connectors and each connector comprises a plurality of contacts, which contacts are electrically connected to a flat cable having a number of electrical cores via the conductive tracing holes and conductive pads on the printed circuit board, thus, high density signal transmission is achieved via this cable assembly. Also, such cable assembly is protected from being damages from environments due to its accessories like the shielding shell surrounding the electrical components.
Further, this cable assembly according to the present invention introduces a specific structure for assembling the separated components together into a shielding shell by adopting mechanical measure only, so as to make the assembling process much more convenient and simpler. That is, the present invention allows assembly of the cables to be performed in a convenient, fast, easy and reliable manner only by the simple mechanical design.
Furthermore, in this cable assembly according to the present invention, outer shell of the cable assembly is integrated with a conveniently and practically mechanical latch structure for releasablly locking the cable assembly to a peripheral device to be connected to the cable assembly for signal transmission purpose in a fixed connection. Particularly, according to the present invention, a cantilever structure which having a locking element is presented to provide reliable fixed connection of the cable assembly with the peripheral device. Moreover, integrated latch mechanism in the outer shell of the cable assembly is achieved in the simple manufacturing process. Additionally, such design effectively reduces the cost.
BRIEF DESCRIPTION OF THE DRAWINGS
These and/or other aspects and advantages of the invention will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
Fig. 1 is an exploded schematic view of a cable assembly with locking function according to a preferred embodiment of the present invention;
Fig. 2 is another exploded schematic view of the cable assembly with locking function according to the preferred embodiment of the present invention;
Fig. 3 is a schematic view of one connector in the cable assembly with locking function according to the preferred embodiment of the present invention;
Fig. 4 is a schematic view of a printed circuit board in the cable assembly with locking function according to the preferred embodiment of the present invention;
Fig. 5 is a schematic view of a separator in the cable assembly with locking function according to the preferred embodiment of the present invention;
Fig. 6 is a schematic view of a first half shielding shell part of a shielding shell in the cable assembly with locking function according to the preferred embodiment of the present invention;
Fig. 7 is a schematic view of the partially assembled cable assembly according to the preferred embodiment of the present invention;
Fig. 8 is another schematic view of the partially assembled cable assembly according to the preferred embodiment of the present invention;
Fig. 9 is a schematic view of the cable assembly with locking function according to the preferred embodiment of the present invention, without a second half shielding shell part and an outer shell;
Fig. 10 is a schematic view of the cable assembly with locking function according to the preferred embodiment of the present invention, without an outer shell, to illustrate engagement between the first and second half shielding shell parts;
Fig. 1 1 is a schematic view of the completely assembled cable assembly according to the preferred embodiment of the present invention;
Fig. 12 is a schematic view of application of the completely assembled cable assembly according to the preferred embodiment of the present invention into the peripheral device;
Fig. 13 is a sectional view of application of the completely assembled cable assembly according to the preferred embodiment of the present invention into the corresponding device shown in Fig. 12 along the line P-P in Fig. 12, to illustrate the latch function achieved between the latch element of the cable assembly and a corresponding latch element of the peripheral device;
Fig. 14 is another schematic view of the cable assembly with locking function according to an alternative embodiment of the present invention in a partially assembled manner, in which several separators are located respectively among the two neighboring connectors; and
Fig. 15 is another further schematic view of the cable assembly with locking function according to another alternative embodiment of the present invention in a partially assembled manner, in which only one separator is located among the connectors;
Fig. 16 is a perspective view of a shielded electrical cable in the cable assembly according to a preferred embodiment of the present invention; and
Fig. 17 is transverse cross sectional view of cables in the cable assembly according to the preferred embodiment of the present invention.
The scope of the present invention will in no way be limited to the simply schematic views of the drawings, the number of constituting components, the materials thereof, the shapes thereof, the relative arrangement thereof, etc., and are disclosed simply as an example of an embodiment. DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS OF THE IVENTIQN
Exemplary embodiments of the present disclosure will be described hereinafter in detail with reference to the attached drawings, wherein the same reference numerals refer to the like elements. The present disclosure may, however, be embodied in many different forms and should not be construed as being limited to the embodiment set forth herein; rather, these embodiments are provided so that the present disclosure will be thorough and complete, and will fully convey the concept of the disclosure to those skilled in the art.
Referring to Figs. 1-2, a cable assembly 1000 with locking function according to one preferred embodiment of the present invention is provided for being in electrical connection with a peripheral device 2000 (see Fig. 12). As shown in Figs. 1-2, the cable assembly 1000 with locking function at least comprises two connectors 1, a printed circuit board 2, a flat cable 4, a separator 3, and a shielding shell 5. In operation, the peripheral device 2000 is to be electrically connected with the cable assembly 1000 via the connectors 1 for signal transmission purpose therebetween.
Referring to Figs. 1-3, according to the preferred embodiment of the present invention, the two connectors 1, embodied as backplane connectors, are placed in parallel with each other. Each connector 1 includes an insulated housing 10 and a plurality of contacts 11 received therein. The housing 10 is a lengthwise insulated housing which has a top wall 12, a bottom wall 13, a pair of side walls 14, 15, and an interior space defined by these walls. The plurality of contacts 11 are independently accommodated in the interior space by barriers. As shown in Fig. 3, each contact 11 has a tail portion 110 extending beyond the bottom wall 13 of the insulated housing 10. Preferably, the insulated housing 10 of each of the two connectors 1 is in an L shape, and the insulated housing 10 includes an elongated part 130 and a stepped part 131 downwardly protruding from frontal portion of the elongated part 130. A stepped wall 1310 is formed in -parallel with a frontal wall 16 of the housing 10, and the tail portions 110 of the contacts 11 are extended beyond the stepped wall 1310 of the stepped part 130 of the insulated housing 10.
Referring to Figs. 1-2 and 4, according to the preferred embodiment of the present invention, the printed circuit board 2 includes a substrate 20, a plurality of conductive tracing holes 210, and a plurality of conductive pads 220, 221, 222, 223. As shown in Fig. 4, the substrate 20 of the printed circuit board 2 has a front portion 21 and an opposite rear portion 22, and the plurality of conductive tracing holes 210 are arranged on the front portion 21 of the substrate 20 and the plurality of conductive pads 220, 221, 222, 223 are arranged on the opposite rear portion 22 of the substrate 20. According to the preferred embodiment, the tail portions 110 of the plurality of contacts 11 are accommodated in the plurality of conductive tracing holes 210, respectively. Additionally, a pair of gaps 224, 225 are formed respectively at both side of the opposite rear portion 22, in order for passing the fasteners, which will be described in the below, therethrough.
Referring to Figs. 1-2, according to the preferred embodiment of the present invention, the flat cable 4, for example a Twinax Cable, includes a number of electrical cores 41, and an outer envelope 43 enveloped at the outside of these electrical cores 41 , so as to achieve the cable 4 in a flat manner. According to the preferred embodiment, terminal ends of these electrical cores 41 of the flat cable 4 are unwrapped and are electrically attached to the plurality of conductive pads 220, 221 , 222, 223, respectively.
In particular, as shown in Figs. 16 and 17, the electrical cores 41 of the flat cable 4 form one or more pairs of conductors 410 extending along a length, L, of the flat cable 4 and spaced apart from each other along a width, w, of the flat cable 4. Each of the one or more pairs of conductors 410 comprises a first conductor 412 and a second conductor 414, and each of the first and second conductors 412, 414 comprises a conductor wire 410a surrounded by a conductor insulation 410b.
Referring to Figs. 16 and 17, the outer envelope 43 of the flat cable 4 further comprises first and second shielding films 430 disposed on opposite sides of the flat cable 4. Specifically, as shown in Fig. 17, the first and second shielding films 430 includes cover portions 430a and pinched portions 430b arranged such that, in transverse cross section, the cover portions 430a of the first and second shielding films 430 in combination substantially surround each of the first and second conductors 430, and the pinched portions 430b of the first and second shielding films 430 in combination form at least one pinched portion of the flat cable 4 between the first and second conductors 412, 414. A maximum separation between the cover portions 430a of the first and second shielding films 430 is D, and, a minimum separation between the pinched portions 430b of the first and second shielding films 430 is d, d/D is less than about 0.5. Preferably, the flat cable 4 may optionally include an adhesive layer 42 disposed between first and second shield films 430. The adhesive layer 42 bonds at least the pinched portions 430b of the first and second shield films 430 to each other to form the outer envelope 43 of the flat cable 4. Referring to Figs. 1-2 and 5, according to the preferred embodiment of the present invention, the separator 3 is disposed between the two connectors 1 and provided with a first locking member 330 at the tail portion 33 thereof. Preferably, as shown in Fig. 5, the separator 3 is in an L shape and includes an elongated body 3a and a step body 3b downwardly protruding from frontal portion of the elongated body 3a. The separator 3 has first bottom wall 31 , second bottom wall 32 stepped from the first bottom wall 31 , a pair of side walls 34, 35, and a step wall 30 formed perpendicularly to the first bottom wall 31 and second bottom wall 32. According to the preferred embodiment, as shown in Figs. 7-8, the stepped walls 1310 of the insulated housings 10 of the two connectors 1 and the step wall 30 of the step body 3b of the separator 3 are resisted against end side of the printed circuit board 2 so as to locate the two connectors 1 and the separator 3 in position. It is worthy to be mentioned that, according to the present invention, the separator 3 may functions as a locking unit by which the separated components, for example, the connectors 1, the PCB 2, the flat cable 4, etc. are assembled together into the shielding shell 5 so as to form a firmly mechanical structure for the cable assembly. Further, Location and number of the separator may vary in different situations. That is, in the case that a plurality of connectors (more than two) are arranged, only one separator may be placed among these connectors; or, several separators are optionally placed in any two neighboring connectors. For example, according to the preferred embodiment of the present invention, as shown in Figs. 1 and 2, one separator 3 is placed between the two connectors 1. In an alternative embodiment shown in Fig. 14, several separators are located respectively among every two neighboring connectors. In another alternative embodiment shown in Fig. 15, only one separator is located among these (more than two) connectors.
Referring to Figs. 1-2 and 6, according to the preferred embodiment of the present invention, the shielding shell 5 is formed with an inner space therein, wherein at least portions of the two connectors 1 , the printed circuit board 2, at least a portion of the separator 3, and at least a portion of the flat cable 4 are accommodated in the inner space, wherein the shielding shell 5 is provided with a second locking member 5130 being engaged with the first locking member 330 of the separator 3. The shielding shell 5 is preferably made by metal material.
According to the preferred embodiment, as shown in Figs. 7-8, when assembled, that is, when the stepped walls 1310 of the insulated housings 10 of the two connectors 1 and the step wall 30 of the step body 3b of the separator 3 are assembled to be resisted against end side of the printed circuit board 2 so as to locate the two connectors 1 and the separator 3 in position, the first locking member 330 located at the tail portion 33 of the separator 3 is extruded beyond rear walls of the insulated housings 10 of the two connectors 1. Specifically, the first locking member 330 is embodied as a through hole 330 laterally through rear end of the elongated body 3a (that is, the tail portion 33 of the separator 3), and the second locking member 5130 is embodied as a lug 5130 formed on the shielding shell 5. The lug 5130 is inserted into the through hole 330 when assembled. Alternatively, in another embodiment, the first locking member 330 may be formed as a recessed portion on the elongated body 3a (that is, the tail portion 33 of the separator 3), and in that case, the second locking member 5130 (for example, a protrusion) is fitted into the recessed portion so as to achieve a locking function.
According to the present invention, as shown in Figs. 1-2 and 6, the shielding shell 5 may further comprises first and second half shielding shell parts 51, 52. The first half shielding shell part 51 has a top wall 510, a bottom wall 511, a side wall 512, and a first interior defined by these walls 510, 511, 512. The first interior of the first half shielding shell part 51 is divided by a first middle partition 513. The second locking member 5130 is formed at the frontal portion of the first half shielding shell part 51, i.e., at the frontal of the first middle partition 513. Through orifices 5131, 5132, 5133 are laterally formed in the middle of the first half shielding shell part 51. Engaged walls 514, 515, 516, and a groove 517 defined by these walls 514, 515, 516 are formed at the rear portion of the first half shielding shell part 51, i.e., at the rear of the first middle partition 513. Through orifices 5140, 5160 are longitudinally formed in the engaged walls 514, 516.
Preferably, the second half shielding shell part 52 has a generally similar and symmetrical configuration with that of the first half shielding shell part 51, except the second locking member 5130 in the preferred embodiment. The second half shielding shell part 52 has a top wall 520, a bottom wall 521, a side wall 522, and a second interior defined by these walls 520, 521, 522. The second interior of the second half shielding shell part 52 is divided by a second middle partition 523. Through orifices 5231, 5232, 5233 are laterally formed in the middle of the second half shielding shell part 51. Engaged walls 524, 525, 526, and a groove 527 defined by these walls 524, 525, 526 are formed at the rear portion of the second half shielding shell part 52, i.e., at the rear of the middle partition 523. Through orifices 5240, 5260 are longitudinally formed in the engaged walls 524, 526. As shown in Figs. 9-10, the first and second half shielding shell parts 51, 52 are firmly engaged with each other by respectively fastening a plurality of first fastening elements 71 (for example, three first screws 71 as shown) to these through orifices 5131, 5132, 5133, 5231, 5232, 5233, correspondingly.
Specifically, the second locking member 5130 may be provided at least at one of the first and second half shielding shell parts 51, 52, or be provided at both of the parts 51, 52. In the preferred embodiment, as shown in Fig. 2, the second locking member 5130 (the lug 5530 in the preferred embodiment) is laterally extended from inner side wall in the first half shielding shell part 51. Alternatively, there are two second locking member 5130 respectively provided at both of the first and second half shielding shell parts 51, 52. In such case, the first locking member 330 is embodied as the through hole, such that both of the two second locking members 5130 may be inserted into the through hole (first locking member) 330 so as to achieve a locking function.
According to one embodiment of the present invention, as shown in Figs. 1-2, the cable assembly 1000 further comprises an outer shell 6 for protection of the flat cable 4 against external forces. The outer shell 6 has top wall 60, bottom wall 61, a pair of side walls 62, 63, and a receiving space 64 defined by these walls 60, 61, 62, 63. The flat cable 4 is received in the receiving space 64. Through orifices 600, 601 are longitudinally formed at the frontal portion of the top wall 60. Correspondingly, through orifices 610, 611 are longitudinally formed at the frontal portion of the bottom wall 61. The outer shell 6 is preferably made of plastic material.
According to one embodiment of the present invention, as shown in Figs. 1-2, a latch mechanism 8 is provided at top wall 60 of the outer shell 6 and adapted to latch the cable assembly 1000 into a peripheral device 2000. Specifically, the latch mechanism 8 comprises an elongated U-shaped groove 603, 604 formed in the top wall 60 of the outer shell 6, a cantilever arm 605 suspended in the U-shaped groove 603, 604, and, a latch element 6050 provided at the cantilever arm 605. The latch element 6050 of the latch mechanism 8 is adapted for being engaged with a corresponding latch element 2050 of the peripheral device 2000 to achieve a latch function. According to the present invention, as shown in Figs. 1-2 and Fig. 13, the cantilever arm 605 further comprises an end area 6051 formed at the free end thereof. As shown in Fig. 13, the latch element 6050 of the latch mechanism 8 is engaged from the corresponding latch element 2050 of the peripheral device 2000 so as to achieve a latch function once the cable assembly 1000 is fitted into the corresponding device 2000. Meanwhile, the latch element 6050 of the latch mechanism 8 is disengaged from the corresponding latch element 2050 of the peripheral device 2000 so as to achieve a release function once the end area 6051 of the cantilever arm 605 is pressed down.
According to one embodiment of the present invention, as shown in Figs. 1-2 and 12, the shielding shell 5 further comprises an engaged part 530 at rear end thereof, the outer shell 6 further comprises an engaging part 630 at frontal end thereof and adapted to be engaged with the engaged part 530, and the engagement between the engaged part 530 and the engaging part 630 is fastened by the second fastening element like screws 72. At the same time, the flat cable 4 is fixedly received in the receiving space 64 of the outer shell 6 by these second screws 72.
According to one embodiment of the present invention, referring to Figs. 1-2 and 7-11, the following description refers to the assembling procedures of the cable assembly 1000 with locking function.
First of all, to place the two connectors 1, being in paralleled with each other, on the printed circuit board 2, and then, insert the plurality of contacts 11 of the connectors 1 into the plurality of conductive tracing holes 210, correspondingly, until the stepped walls 1310 of the insulated housings 10 of the two connectors 1 are resisted against end side of the printed circuit board 2. Then, to dispose the separator 3 on the printed circuit board 2, between the two connectors 1, until the step wall 30 of the separator 3 are resisted against end side of the printed circuit board 2, and here, the tail portion 33 of the separator 3, where the first locking member 330 is located, is extruded beyond rear walls of the insulated housings 10 of the two connectors 1. Next, to electrically attach (e.g. by soldering) the electrical cores 41 of the flat cable 4 to the plurality of conductive pads 220, 221, 222, 223, respectively. After then, to fit the first half shielding shell part 51 onto the printed circuit board 2 along one lateral side thereof, with the second locking member (the lug) 5130 being inserted into the second locking member (the through hole) 330, subsequently, to fit the second half shielding shell part 52 onto the printed circuit board 2 along the other lateral side thereof, and finally, to interpose the plurality of first screws 71 through these round orifices 5231, 5232, 5233 on the second half shielding shell part 52 and these 5131, 5132, 5133 on the first half shielding shell part 51, respectively, so as to fasten the first and second half shielding shell parts 51, 52, together.
Next, to fit the rest of the flat cable 4 into the receiving space 64 of the outer shell 6, with the engaged part 530 of the shielding shell 5 being in the engagement with the engaging part 630 of the outer shell 6; and finally, to sequentially interpose the plurality of second screws 72 through these round orifices 600, 601 of the outer shell 6, through orifices 5140, 5160, and 5240, 5260, the gaps on the printed circuit board 2, and these round orifices 610, 611 of the outer shell 6, respectively, so as to fasten the first and second half shielding shell parts 51, 52, together.
Further, referring to Figs. 12-13, the following description refers to the fitting process of applying the cable assembly 1000 with locking function into the peripheral device 2000.
When the cable assembly 1000 with locking function is inserted into the peripheral device 2000, the latch element 6050 of the latch mechanism 8 is engaged with the corresponding latch element 2050 of the peripheral device 2000 so as to latch the cable assembly 1000 to the peripheral device 2000. Contrariwise, when the once said end area (6051) of the cantilever arm 605 of the latch mechanism 8 is pressed down, the latch element 6050 is disengaged from the corresponding latch element 2050 of the peripheral device 2000 so as to easily release the cable assembly 1000 from the peripheral device 2000.
According to one embodiment of the present invention, a cable assembly with a compact array of the connectors within a limited space is provided. Such cable assembly can comprises two or more connectors and each connector comprises a plurality of contacts, which contacts are electrically connected to a flat cable having a number of electrical cores via the conductive tracing holes and conductive pads on the printed circuit board, thus, high density signal transmission is achieved via this cable assembly. Also, such cable assembly is protected from being damages from environments due to its accessories like the shielding shell surrounding the electrical components. Thus, such cable assembly is suitably for providing high density signal transmission. Further, this cable assembly according to the present invention introduces a specific structure for assembling the separated components together into a shielding shell by adopting mechanical measure only, so as to make the assembling process much more convenient and simpler. That is, the present invention allows assembly of the cables to be performed in a convenient, fast, easy and reliable manner only by the simple mechanical design. Furthermore, in this cable assembly according to the present invention, outer shell of the cable assembly is integrated with a conveniently and practically mechanical latch structure for releasably locking the cable assembly to a peripheral device for signal transmission purpose in a fixed connection. Particularly, according to the present invention, a cantilever structure which having a locking element is presented to provide reliable fixed connection of the cable assembly with the peripheral device. Moreover, integrated latch mechanism in the outer shell of the cable assembly is achieved in the simple manufacturing process. Additionally, such design effectively reduces the cost.
Following are a list of items of the present disclosure.
Item 1 is a cable assembly, comprising:
at least two connectors (1) separated by at least one separator (3) having a first locking member (330) thereon, each of said at least two connectors including an insulated housing (10) and a plurality of contacts (11) received therein, each contact having a tail portion (110) extending beyond a bottom wall (13) of said insulated housing;
a printed circuit board (2) having a front portion (21) and an opposite rear portion (22), with a plurality of conductive tracing holes (210) arranged on said front portion (21) and a plurality of conductive pads (220, 221, 222, 223) arranged on said opposite rear portion (22); wherein the plurality of conductive tracing holes are accommodated therein with said tail portions of the plurality of contacts, respectively;
a flat cable (4) including a number of electrical cores (41), wherein these electrical cores of said flat cable are electrically attached to the plurality of conductive pads, respectively; and
a shielding shell (5) defining an inner space therein, wherein at least portions of said at least two connectors, said printed circuit board, at least a portion of said at least one separator (3), and at least a portion of said flat cable are accommodated in said inner space, wherein said shielding shell (5) is provided with a second locking member (5130) being engaged with said first locking member of said separator.
Item 2 is the cable assembly according to item 1, wherein said at least two connectors (1) are parallel to each other.
Item 3 is the cable assembly according to item 1, wherein said insulated housing (10) of each of said at least two connectors is in an L shape, and said insulated housing (10) includes an elongated part (130) and a stepped part (131) downwardly protruding from frontal portion of said elongated part, wherein said tail portions (110) of said contacts are extended beyond stepped wall (1310) of said stepped part of said insulated housing.
Item 4 is the cable assembly according to item 3, wherein said separator (3) is in an L shape and includes an elongated body (3 a) and a step body (3b) downwardly protruding from frontal portion of said elongated body, wherein stepped walls (1310) of said stepped parts (131) of said insulated housings (10) and step wall (30) of said step body (3b) of said separator (3) are resisted against end side of said printed circuit board (2) so as to locate said at least two connectors (1) and said separator (3) in position, wherein said first locking member (330) of said separator (3) is extruded beyond rear walls of said insulated housings (10).
Item 5 is the cable assembly according to item 1, wherein said separator (3) is in an L shape and includes an elongated body (3 a), said first locking member is a through hole (330) laterally through rear end of said elongated body (3a), and said second locking member is a lug (5130) formed on said shielding shell (5) and being inserted into the through hole (330).
Item 6 is the cable assembly according to item 1, wherein said shielding shell (5) further comprises first and second half shielding shell parts (51, 52), and said second locking member (5130) is provided at least at one of said first and second half shielding shell parts (51, 52).
Item 7 is the cable assembly according to item 6, wherein said first and second half shielding shell parts (51, 52) are firmly engaged with each other by at least one first fastening element (71).
Item 8 is the cable assembly according to any one of items 1-7, further comprising an outer shell (6) defining a receiving space (64) therein, and said flat cable (4) is accommodated in said receiving space (64); wherein a latch mechanism (8) is provided at top wall of said outer shell (6) and is adapted to latch said cable assembly into a peripheral device.
Item 9 is the cable assembly according to item 8, wherein said latch mechanism (8) comprises an elongated U-shaped groove (603, 604) formed in top wall of said outer shell (6), a cantilever arm (605) suspended in said U-shaped groove (603, 604), and, a latch element (6050) provided at said cantilever arm (605); wherein said latch element (6050) of said latch mechanism (8) is adapted for being engaged with a corresponding latch element of the peripheral device to achieve a latch function.
Item 10 is the cable assembly according to item 9, wherein said cantilever arm (605) further comprises an end area (6051) formed at the free end thereof, and, said latch element (6050) of said latch mechanism (8) is disengaged from the peripheral latch element of the peripheral device so as to achieve a release function once said end area (6051) is pressed down.
Item 11 is the cable assembly according to item 8, wherein said shielding shell (5) further comprises an engaged part (530) at rear end thereof, said outer shell (6) further comprises an engaging part (630) at frontal end thereof and adapted to be engaged with said engaged part (530), and the engagement between said engaged part (530) and said engaging part (630) is fastened by at least one second fastening element (72).
Item 12 is the cable assembly according to item 8, wherein said flat cable (4) are fixedly accommodated in said receiving space (64) of said outer shell (6) by at least one second fastening element (72).
Item 13 is the cable assembly according to item 1 , wherein said electrical cores (41) of said flat cable (4) form one or more pairs of conductors (410) extending along a length, L, of said flat cable (4) and spaced apart from each other along a width, w, of said flat cable (4), each of said one or more pairs of conductors (410) comprising a first conductor (412) and a second conductor (414), each of said first and second conductors (412, 414) comprising a conductor wire (410a) surrounded by a conductor insulation (410b); and
said flat cable (4) further comprises first and second shielding films (430) disposed on opposite sides of said flat cable (4), said first and second shielding films (430) including cover portions (430a) and pinched portions (430b) arranged such that, in transverse cross section, said cover portions (430a) of said first and second shielding films (430) in combination substantially surround each of said first and second conductors (430), and said pinched portions (430b) of said first and second shielding films (430) in combination form at least one pinched portion of said flat cable (4) between said first and second conductors (412, 414), a maximum separation between said cover portions (430a) of said first and second shielding films (430) being D, a minimum separation between said pinched portions (430b) of said first and second shielding films (430) being d, d/D being less than about 0.5.
Although several exemplary embodiments have been shown and described, it would be appreciated by those skilled in the art that various changes or modifications may be made in these embodiments without departing from the principles and spirit of the disclosure, the scope of which is defined in the claims and their equivalents.

Claims

What is claimed is,
1. A cable assembly, comprising:
at least two connectors (1) separated by at least one separator (3) having a first locking member (330) thereon, each of said at least two connectors including an insulated housing (10) and a plurality of contacts (1 1) received therein, each contact having a tail portion (1 10) extending beyond a bottom wall (13) of said insulated housing;
a printed circuit board (2) having a front portion (21) and an opposite rear portion (22), with a plurality of conductive tracing holes (210) arranged on said front portion (21) and a plurality of conductive pads (220, 221, 222, 223) arranged on said opposite rear portion (22); wherein the plurality of conductive tracing holes are accommodated therein with said tail portions of the plurality of contacts, respectively;
a flat cable (4) including a number of electrical cores (41), wherein these electrical cores of said flat cable are electrically attached to the plurality of conductive pads, respectively; and
a shielding shell (5) defining an inner space therein, wherein at least portions of said at least two connectors, said printed circuit board, at least a portion of said at least one separator (3), and at least a portion of said flat cable are accommodated in said inner space, wherein said shielding shell (5) is provided with a second locking member (5130) being engaged with said first locking member of said separator.
2. The cable assembly according to claim 1 , wherein said insulated housing (10) of each of said at least two connectors is in an L shape, and said insulated housing (10) includes an elongated part (130) and a stepped part (131) downwardly protruding from frontal portion of said elongated part, wherein said tail portions (1 10) of said contacts are extended beyond stepped wall (13 10) of said stepped part of said insulated housing.
3. The cable assembly according to claim 2, wherein said separator (3) is in an L shape and includes an elongated body (3a) and a step body (3b) downwardly protruding from frontal portion of said elongated body, wherein stepped walls (13 10) of said stepped parts (13 1) of said insulated housings (10) and step wall (30) of said step body (3b) of said separator (3) are resisted against end side of said printed circuit board (2) so as to locate said at least two connectors (1) and said separator (3) in position, wherein said first locking member (330) of said separator (3) is extruded beyond rear walls of said insulated housings (10).
4. The cable assembly according to claim 1, wherein said separator (3) is in an L shape and includes an elongated body (3 a), said first locking member is a through hole (330) laterally through rear end of said elongated body (3a), and said second locking member is a lug (5130) formed on said shielding shell (5) and being inserted into the through hole (330).
5. The cable assembly according to claim 1, wherein said shielding shell (5) further comprises first and second half shielding shell parts (51, 52), and said second locking member (5130) is provided at least at one of said first and second half shielding shell parts (51, 52).
6. The cable assembly according to any one of claims 1-6, further comprising an outer shell (6) defining a receiving space (64) therein, and said flat cable (4) is accommodated in said receiving space (64); wherein a latch mechanism (8) is provided at top wall of said outer shell (6) and is adapted to latch said cable assembly into a peripheral device.
7. The cable assembly according to claim 6, wherein said latch mechanism (8) comprises an elongated U-shaped groove (603, 604) formed in top wall of said outer shell (6), a cantilever arm (605) suspended in said U-shaped groove (603, 604), and, a latch element (6050) provided at said cantilever arm (605); wherein said latch element (6050) of said latch mechanism (8) is adapted for being engaged with a corresponding latch element of the peripheral device to achieve a latch function.
8. The cable assembly according to claim 7, wherein said cantilever arm (605) further comprises an end area (6051) formed at the free end thereof, and, said latch element (6050) of said latch mechanism (8) is disengaged from the peripheral latch element of the peripheral device so as to achieve a release function once said end area (6051) is pressed down.
9. The cable assembly according to claim 6, wherein said shielding shell (5) further comprises an engaged part (530) at rear end thereof, said outer shell (6) further comprises an engaging part (630) at frontal end thereof and adapted to be engaged with said engaged part (530), and the engagement between said engaged part (530) and said engaging part (630) is fastened by at least one second fastening element (72).
10. The cable assembly according to claim 1, wherein said electrical cores (41) of said flat cable (4) form one or more pairs of conductors (410) extending along a length, L, of said flat cable (4) and spaced apart from each other along a width, w, of said flat cable (4), each of said one or more pairs of conductors (410) comprising a first conductor (412) and a second conductor (414), each of said first and second conductors (412, 414) comprising a conductor wire (410a) surrounded by a conductor insulation (410b); and
said flat cable (4) further comprises first and second shielding films (430) disposed on opposite sides of said flat cable (4), said first and second shielding films (430) including cover portions (430a) and pinched portions (430b) arranged such that, in transverse cross section, said cover portions (430a) of said first and second shielding films (430) in combination substantially surround each of said first and second conductors (430), and said pinched portions (430b) of said first and second shielding films (430) in combination form at least one pinched portion of said flat cable (4) between said first and second conductors (412, 414), a maximum separation between said cover portions (430a) of said first and second shielding films (430) being D, a minimum separation between said pinched portions (430b) of said first and second shielding films (430) being d, d/D being less than about 0.5.
PCT/US2013/020919 2012-01-10 2013-01-10 Cable assembly WO2013106495A1 (en)

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