Cable assembly and electronic wiring assembly with the same

专利摘要:
The cable includes a plurality of coaxial wires. Each wire includes a central conductor surrounded by a dielectric sheath, the sheath being surrounded by a conductive shield. The wires are arranged side by side at each wire end to which the terminal member is connected. The terminal members have opposing major surfaces, with a first array of contacts on the first face and a second array of contacts on the opposing face, each of the first contacts being electrically connected to a corresponding second contact. Each central conductor of the wire member is connected to one corresponding first contact. Each electronic device will include a circuit board at each end having contacts arranged to compressively contact the second contact. The terminal member is held between the clamp and the substrate by an elastomeric spring that maintains compression and openings in the substrate and the terminal member that ensure a custom alignment of the contacts.
公开号:KR20030016153A
申请号:KR1020020003569
申请日:2002-01-22
公开日:2003-02-26
发明作者:이매드 솝
申请人:더 루드로우 컴퍼니 엘피；
IPC主号:

专利说明:

CABLE ASSEMBLY AND ELECTRONIC WIRING ASSEMBLY WITH THE SAME
[10] The present invention relates to multiple wire cables, in particular small size coaxial wiring.
[11] High data and signal transmission rates are limited by the characteristics of the conductors used for transmission. In electronic systems with independent components connected by flexible multi-wire cables, the signal rate is limited not only by the flexible wire used as the cable, but also by the connection between the cable and each component.
[12] For high speed applications, various high speed cabling may be used, including high performance coaxial wiring, twisted pair wire, or other configurations. Any cable selected will have a fixed bandwidth or frequency capability and will use a low voltage differential signal (LVDS) to limit switching noise that can cause electromagnetic interference with other electronic functions. Although cable bandwidth is a theoretical maximum, in practical use, the bandwidth is considerably limited by the connections between cables and circuit boards or other components typically used in system components that limit the available bandwidth. Discontinuous junctions between various different kinds of conductors may extend the time for a clock cycle. In addition, the difference in propagation time on different lines may cause skew, which likewise causes the duration to be increased to include a time range in which signals sent to each line reach a designated place.
[13] In general, the connection between the cable and the components requires a connector member at each cable end. The connectors are easily connected to the cable and to components such as a circuit board. If the system requires the removal of cables and components, each end of the cable will include two mating connector parts, one connected to the cable end and the other to the circuit board. Such connectors each generate some discontinuity that limits the bandwidth below the theoretical capability of the cable. Such discontinuity occurs where the circuit board mates with another connector portion, where the connector portion mates with the corresponding other connector portion, and where the connector portion is connected with the cable. It is believed that this discontinuity accumulates and in some cases reduces the frequency bandwidth by about half.
[14] In addition to the effect on functionality, conventional connectors significantly increase the size and cost of high speed cable systems. Connectors must be installed on component boards as well as cables and require skilled labor. Cable wires and circuit components can be provided from various suppliers, and the compatibility of each of the parts of the connector to be matched must be taken into account. In addition, cable manufacturers will have a variety of different connectors with specific customers and need to keep various components in stock. The cost of manufacturing also increases considerably in that cables with various conductors must be carefully assembled so that each conductor is securely connected to the appropriate contact on each connector.
[15] The present invention overcomes the limitations of the prior art by providing a cable with a plurality of coaxial wires. Each wire has a central conductor surrounded by a dielectric sheath, which sheath is surrounded by a conductive shield. The wires are arranged side by side at each wire end to which the terminal member is connected. The terminal member comprises major surfaces facing each other, the first contact array on the first face and the second array of contacts on the opposite face, each first contact being electrically connected to the corresponding second contact. Is connected. Each central conductor of the wire member is connected with one of the corresponding first contacts. The electronics will include a circuit board at each end, in which case the contacts will be aligned for pressurized contact with the second contact. The terminal member is held between the clamp and the substrate by an elastomeric spring that maintains compression and openings in the substrate and the terminal member that ensure a custom alignment of the contacts.
[1] 1 is a perspective view of a cable assembly in an electronic component system in accordance with a preferred embodiment of the present invention.
[2] 2 is an exploded view of the cable assembly terminal according to the embodiment of FIG.
[3] 3 is an enlarged cross-sectional view of a terminal according to the embodiment of FIG.
[4] Brief description of symbols in the drawings
[5] 10 electronic system 16 cable assembly
[6] 22 substrate 26 opening
[7] 28: array 36: wire
[8] 44: shield layer 46: jacket
[9] 50: sheet
[16] 1 shows an electronic system 10 having a first electronic device 12, a second electronic device 14, and a cable assembly 16. The devices may be any kind of device. The first and second devices may be, for example, base computers and peripherals, or may also be medical ultrasound imaging devices and transducers. The devices may include independent housings connected by flexible cables as shown, or may be electronic components that are independent of each other and connected by cables in a common housing. Each device includes circuit members 20 and 22, in which the circuit member is a rigid flat printed circuit board in a preferred embodiment, while in other embodiments a flexible circuit, an integrated circuit chip, a ceramic circuit, a composite circuit member, or Any circuit with exposed conductive contacts can be included as described below.
[17] FIG. 2 shows a developed view of the connection between one end of the cable assembly 16 and a portion of the device substrate 22. The substrate includes an interface region 24 having a pair of spaced through openings 26. Between the through openings is an array 28 of contacts 30. Each contact is electrically disconnected from the other contacts and is connected to another circuit on the substrate 22 by a trace (not shown). The array of contacts is aligned in line with the openings 26 on one axis, and the contacts are regularly aligned along the line. Each contact is a long bar oriented perpendicular to the line of the array, and each contact is horizontal to the other contact. The preferred embodiment has twenty contacts, but the number is based on the number of wires in the cable as described below and can be varied as needed. In a preferred embodiment, the contacts are plated with gold or other wear resistant metal to provide low resistance contact over longer device life. The contacts are preferably spaced apart so that the center-to-center spacing is 0.25 inch, but this spacing can range from 0.015 to 0.100 inch as needed. The second substrate contact 32 is located proximate to the contact array 28. The second contact is as long as the contact array 28 and parallel to the array. The contact 32 is also connected to another substrate circuit (not shown).
[18] The cable assembly comprises a bundle 34 of fine coaxial wires 36 arranged side by side in the form of a ribbon. Each wire includes a central conductor 40 surrounded by a dielectric layer 42. The dielectric layer is surrounded by a shield layer 44 surrounded by an outer jacket 46 of insulating material. In a preferred embodiment, the jacket is formed as a single piece so that adjacent wires are joined to each other over the entire length. In another embodiment, the wires may be joined in the form of a ribbon at their ends and free at the middle portion to be housed in another additional sheath to provide a circular cable contour. Prior to assembly, a portion of the cable is stripped off as shown, where a portion of each center conductor extends out of the shell. Although the shield layer is shown as being interrupted before the end of the skin for illustrative purposes, it is preferred that the shield layer extends to the end of the skin. The jacket is stripped to a degree sufficient to expose a portion of the shield on each wire. Similarly, in embodiments where such a connection is required at each end, each end of the bundle may be peeled off, but in other embodiments only one end may be peeled off and the other end may be connected by conventional means.
[19] In a preferred embodiment the center conductor is a single strand copper wire of 38 wire gauge, but the size may range from 44 and 36 as desired. The dielectric layer is formed of FEP and has a wall thickness of 0.0045 inches, the outer diameter is 0.013 inches, but the outer diameter may range from 0.0065 to 0.065 inches, if necessary. The shield is formed by 17 strand wrapping of 44 standard copper wire. The jacket is formed of PVC and provides a total ribbon thickness of about 0.025 inches, which thickness may range from 0.015 to 0.100 as needed. In a preferred embodiment the center-to-center spacing of the wires is 0.025 inches, which may be 0.015 to 0.100 inches as needed.
[20] The cable assembly includes a terminal sheet 50 at one or both ends. The sheet is a 0.060 thick flat member formed of FR4. The sheet is inherently rigid, but in other embodiments some flexibility is allowed. The sheet is rectangular and oriented perpendicular to the axis of the cable bundle to which the sheet is attached. The sheet 50 has a top surface 52 and a bottom surface 54. On the top surface, the array of conductive top contacts 60 is oriented along the major axis of the sheet, the top contacts being spaced from each other at intervals corresponding to the spacing of the center conductors of the wires of the cable ribbon. The second upper contact 61 extends along the longitudinal direction of the array, spaced apart and parallel to the array. The bottom surface of the sheet comprises a contact pattern, which is a mirror image of the pattern on the substrate, such that the contacts overlap with the contacts of the interface area of the substrate, and one-to-one between each contact and the corresponding contact on the other part. Provide contact. As described below, there are conductive passageways between each top contact and each corresponding bottom contact. The terminal sheet includes a pair of extending ears 62 that each form an opening 64 having the same position and size as the corresponding openings 26 on the pair of substrates 22.
[21] The clamp or lid member 66 is sized to cover the entire sheet and forms a pair of similar openings 70 to align with the openings of the sheet and the substrate. The bottom surface of the cover is contoured to receive the wire end and terminal sheet, and the top surface defines a recess 72 concentric with each opening 70 to receive the spring washer 74. In a preferred embodiment, the cover is formed of a rigid thermoplastic material having electrical insulation. The pair of pins 76 has shanks 80 that are sized to fit closely within the openings of the lid, sheet and substrate. The pin head 82 and the split tapered nose each have opposing shoulder faces 86 spaced a predetermined distance to compress the washer when installed.
[22] 3 shows assembled and connected cable terminals. The cable assembly terminals the ribbon end so that each of the central conductors is on one corresponding contact 60 and all the shields 44 are on the contact 61 so that the shield does not contact any contact 60. It is assembled by aligning with the sheet and placing it. Thereafter, the wires are soldered in place by a reflow process. One or both ends are so soldered, and the cable assembly is completed, stored, stocked, shipped later, or shipped for installation elsewhere.
[23] As shown in Fig. 3, the terminal member 50 includes the above-described array of contacts on both sides. The bottom side includes an array of bottom contacts 90 shaped and disposed to cover the contacts 30 of the substrate. The second lower contact portion 92 covers the contact portion 32 on the substrate. In order to provide communication between the contacts on both sides of the sheet 50, passages 94 are formed in the sheet and fully plated to connect each top contact 60 with a corresponding bottom contact 90. Similarly, several passages 96 are fully plated to provide a connection between contact 61 and contact 92.
[24] As installed, the bottom contact 90 of the sheet is pressed against the substrate contact 30 by the force of the received spring washer 74. As intended, each washer provides a spring force distributed over the contact area, providing sufficient pressure to ensure resistive contact at each contact. The axis 100 of the pin is aligned with the center of the contacts 30, 90 to provide a uniformly distributed force. In another embodiment, a compressible elastomeric member 102 may be provided between the cover and the cable terminal sheet to provide continuous spring force instead of or in addition to the spring washer.
[25] In a preferred embodiment, the finely spaced contacts are aligned using a "Gold Dot" pattern for standardization and convenience. However, it is also possible to use standard or conventional patterns of other conductive contacts.
[26] As mentioned above, although it demonstrated with reference to preferable embodiment and an alternative embodiment, this invention is not limited to such an Example. For example, in order to space the substrate contacts (such as where substrate precision is limited), the wires may be more closely spaced than they actually are. Such an embodiment would use one or more contact arrays to provide an appropriate number of contacts while increasing the spacing of each array. Instead, the terminal sheet may use extended traces to connect the top contact to the bottom contact so that the bottom contacts can be spaced wider than the top contacts.
[27] Some discontinuities that limit the bandwidth below the theoretical capacity of the cable can be reduced and provide a simple cable assembly.

权利要求:
Claims (20)
[1" claim-type="Currently amended] As cable assembly:
A plurality of coaxial wire members; And
A terminal member connected to the wire member,
Each wire member comprises a central conductor surrounded by a dielectric sheath, the sheath surrounded by a conductive shield,
The wire members are aligned in line at the first end of each wire member,
The terminal member includes opposing major surfaces, and includes a first array of contacts on the first surface and a second array of contacts on the opposing surface, each of the first contacts being electrically connected to a corresponding second contact;
Wherein each central conductor of the wire member is resistance connected to a corresponding one of the first contacts.
[2" claim-type="Currently amended] The cable assembly of claim 1, wherein the terminal member has a third contact connected to a shield of each wire member.
[3" claim-type="Currently amended] The cable assembly of claim 1, wherein the wire member is aligned with a flat ribbon.
[4" claim-type="Currently amended] 2. The cable assembly of claim 1, comprising a corresponding second terminal member at opposite ends of the wire member.
[5" claim-type="Currently amended] The cable assembly of claim 1, wherein the terminal member forms a custom alignment member.
[6" claim-type="Currently amended] 6. The cable assembly of claim 5, wherein the alignment member includes one or more openings.
[7" claim-type="Currently amended] The cable assembly of claim 1, wherein the flat member is a flat element.
[8" claim-type="Currently amended] The cable assembly of claim 1, wherein the flat member is a flexible sheet.
[9" claim-type="Currently amended] As electrical wiring assembly:
Printed wiring members;
A cable assembly having an opposite end connected at one end to a printed wiring member;
The cable assembly comprises a plurality of coaxial wires each having a center conductor and a shield of the outer circumference,
The cable assembly includes a terminal member connected to each wire at one end or both ends,
The terminal member includes opposing major surfaces, and includes a first array of contacts on the first surface and a second array of contacts on the opposing surface, to which the central conductor of the wire is respectively connected, each of the first contacts being corresponding. Electrically connected to the second contact,
And each second contact overlaps and compressively contacts a corresponding contact in the array of conductive contacts on the printed wiring member.
[10" claim-type="Currently amended] 10. The wiring assembly of claim 9, wherein the printed wiring member is a circuit board.
[11" claim-type="Currently amended] 10. The wiring assembly of claim 9 comprising a printed wiring member connected to each cable assembly end.
[12" claim-type="Currently amended] 10. The wiring assembly of claim 9 including a clamp connected with a printed wiring member while holding the terminal member therebetween.
[13" claim-type="Currently amended] 13. The wiring assembly of claim 12 including a compression member for biasing a terminal member with respect to the printed wiring member.
[14" claim-type="Currently amended] 10. The wiring assembly of claim 9, wherein the printed wiring member forms a first set of openings and the terminal member forms a corresponding second set of openings that are custom aligned with the first set of openings.
[15" claim-type="Currently amended] 15. The wiring assembly of claim 14, comprising pins received in each of the first set of openings, wherein the pins are received in each of the second set of openings.
[16" claim-type="Currently amended] 16. The wiring assembly of claim 15 wherein each pin is a fastening that holds the terminal member compressively with respect to the circuit member.
[17" claim-type="Currently amended] 10. The wiring assembly of claim 9 wherein the first contacts are disposed in a straight line and the wires are densely arranged in a ribbon at the end.
[18" claim-type="Currently amended] 10. The wiring assembly of claim 9, wherein said terminal member is a flexible sheet.
[19" claim-type="Currently amended] As electrical wiring assembly:
A pair of circuit boards;
A cable assembly having opposing ends, each of which is connected to one circuit board; And
A clamp connected to the circuit board,
The cable assembly comprises a plurality of coaxial wires each having a center conductor and a shield of the outer circumference,
The cable assembly includes a terminal member connected to each wire at both ends,
Each terminal member is a flexible sheet having opposing major surfaces, the flexible sheet being a first array of contacts on the first surface and a second array of contacts on the opposite surface to which the central conductors of the wire are respectively connected. Each of the first contacts is electrically connected to a corresponding second contact;
Each second contact overlaps and compressively contacts a corresponding contact in the array of conductive contacts on the corresponding circuit board,
The clamp is connected to the circuit board while holding the terminal member therebetween,
And an elastic compression member compression-received between the clamp and the printed wiring member biases the second contact against the conductive contact of the circuit board.
[20" claim-type="Currently amended] 20. The wiring assembly of claim 19 wherein the terminal member includes elongated contacts on a first surface, and the outer shield of each wire is connected to the elongated contacts.

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引用文献:

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公开号 | 申请日 | 公开日 | 申请人 | 专利标题

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法律状态:
2001-08-20|Priority to US09/933,406

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2001-08-20|Priority to US09/933,406

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2002-01-22|Application filed by 더 루드로우 컴퍼니 엘피

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2003-02-26|Publication of KR20030016153A

优先权:

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申请号 | 申请日 | 专利标题

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US09/933,406|2001-08-20|

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US09/933,406|US6602092B2|2001-08-20|2001-08-20|Cable assembly module with compressive connector|