JP2593330B2 - Flat multi-core signal transmission cable connector and method of manufacturing the same - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connector for a multi-core cable, and more particularly to a connector for connecting an electric wire of a flat multi-core transmission cable to a conductor of a printed circuit board and a method of manufacturing the connector.

The development of new electrical cables with multiple wires embedded in a flat insulator web has provided significant benefits to the computer, telecommunications equipment, electronics industries, and the like. These cables are manufactured from conductors formed as thin parallel wires, such as 0.762 millimeters (0.030 inches) in diameter, whose centerlines are very slightly separated from each other and can be used to carry electrical signals.

Prior Art and Problems Despite the obvious advantages of small dimensions and the ease of handling of a flat cable per se, there are also some mechanical and electrical disadvantages due to the flat shape of the cable. From a mechanical point of view, the difficulty of handling wires when connecting individual wires to electrical components, such as connectors, increases because the wires are thin and the spacing between the wires is very small. In addition, due to the unusually short center line distance between the wires, these wires do not always match the standard center line spacing for commonly used electrical components, which causes interconnection problems.
The development of thinner and even more closely spaced wires complicates the design of connectors that fit smaller cables, plus the aforementioned mechanical problems add to the difficulty. I do.

From an electrical point of view, especially when using flat cables for signal transmission purposes, in order to accurately transmit the signal, the center line of the wire is very close, so it must be specified for each specific application. It is necessary to keep the exact distance of Also, for accurate signal transmission, when terminating flat multi-core cables with connectors, these connectors control the characteristic impedance of the transmitted signal to match the cable and the connected electronic device. Need to be designed.

Conventionally, various types of connectors for connecting a flat cable to a mating connector and an electronic device have been developed.
For example, U.S. Pat.Nos. 4,094,566, 4,181,384 and
See 4,367,909. However, the present invention provides a connector or method of use that is sufficiently practical to be conveniently used in a flat multicore cable having a wire diameter of 0.2032 millimeters (0.008 inches), a fraction of that conventionally used. Disclose. Because of such significantly smaller wire diameters, the number of wires in a single cable increases to 81 wires per inch with the center line spacing decreasing proportionally to 0.3125 millimeters (0.0125 inches). U.S. Pat. No. 4,616,893 discloses a connector having a controlled characteristic impedance between printed circuit boards, but a flat multi-core having a controlled characteristic impedance matching cables, mating connectors and electronic devices. There is no teaching or suggestion of a reasonable connector for the signal transmission cable.

None of the above U.S. patents teaches or suggests a connector and method that is accurate, effective, convenient and economical.

As described in numerous patent publications, there is a constant effort to effectively connect electrical components that are constantly being miniaturized. However, none of these patents teaches a component element shaped to connect electrical elements as in the present invention and a method of manufacturing the same in combination with characteristic steps. Also, known methods and connectors do not have the advantages provided by the connectors and methods of the present invention.

Means for Solving the Problems According to one aspect of the present invention, the insulator at one end of a flat multi-core signal transmission cable in which a plurality of signal wires and ground wires are arranged substantially in parallel in a substantially flat insulator is peeled off. A flat multi-core signal transmission cable connector in which a free end of the ground wire extending in a longitudinal direction of the transmission cable and a bent free end of the signal wire are connected to a ground bus and a signal contact of a housing, respectively. The housing includes a ground bus slot for slidably receiving the ground bus in the longitudinal direction of the ground wire, and a plurality of signal contact holes formed in a row at a predetermined distance from the ground bus slot. The free end of the ground wire is crimped to a crimp portion of the ground bus slidably received in the ground bus slot, and the bending of the signal wire is performed. The free end is connected by soldering to a solder connection portion of the signal contact provided in the signal contact hole, thereby providing a connector for a flat multi-core signal transmission cable.

According to still another aspect of the present invention, the insulator is peeled off from one end of a flat multi-core signal transmission cable in which a plurality of signal wires and ground wires are arranged substantially in parallel in a substantially flat insulator. A method for manufacturing a flat multi-core signal transmission cable connector by connecting a free end of the ground wire extending in a longitudinal direction of a cable and a bent free end of the signal wire to a ground bus and a signal contact of a housing, respectively. A crimping portion of the ground bus, which is slidably received in a ground bus slot of the housing in a longitudinal direction of the ground wire, wherein the signal contact is disposed in a signal contact hole of the housing; And at a first position where the free end of the ground wire approaches the crimping portion of the ground bus, the free end of the ground wire is separated from the solder connection portion of the ground bus. The signal wire is crimped to a crimping portion, and the free end of the signal wire is moved to a second position where the free end of the signal wire contacts the solder connection portion of the signal contact, and the signal wire is moved at the second position. Wherein the free end is solder-connected to the solder connection part of the signal contactor.

The present invention relates to a combination of new and useful inventive component elements and a method of manufacturing the same, utilization of a minimum number of functional components, reduction of manufacturing and operating costs, and use of readily available materials and ordinary components. Have the intent, purpose and advantages over known devices and methods. These objects and advantages should be understood as merely illustrative of some of the superior features and applications of the present invention. The present invention is susceptible of various applications within its scope, and can be modified and changed. Accordingly, other objects and advantages of the invention will be apparent and fully understood by the preferred embodiment in addition to the appended claims and drawings.

The invention is defined by the claims based on the preferred embodiments illustrated in the drawings. For purposes of summarizing the present invention, the present invention can be thought of as a connector adapter that connects a stripped conductor of a flat multicore cable to a conductor of the printed circuit board by a mating connector that rises from the circuit board. The main connector includes a housing having a central longitudinal slot for receiving an elongated conductive ground bus, the top end of the ground bus receiving a stripped ground wire of a flat cable;
The lower end is also received in the mating connector. The ground bus can move from the first position to the second position within the slot. A longitudinal central surface of the main housing passes through the slot and the bus bar. A plurality of parallel holes are formed in the housing on opposite sides of the slot, the holes being adapted to receive signal contacts, the upper ends of which receive the stripped signal wires of the flat cable. At the same time, the lower end is also adapted to be received in the mating connector. The housing also has two downwardly-facing legs defining an opening for receiving the mating connector. The housing also includes the cover half and the rear cover half connectable between the housing and the printed circuit board, between which the flat multi-core cable is mounted above the stripped wires. .

Each cover half has a downwardly projecting first leg with a horizontal upward shelf. In addition, the main connector includes a pair of side latches connectable to the printed circuit board. Each latch has an upwardly projecting leg with a horizontal downward shelf that rides on an upward shelf of the cover half to connect the cover half and the housing with respect to the latch and the printed circuit board. Each cover half has a downwardly projecting second leg, the second leg being on either side of the longitudinal center plane of the connector and inside the first leg,
Each second leg has a lower surface located on the inner upper surface of the main connector. Further, the main housing includes a gap between each first leg and a second leg adjacent thereto, each of the first legs being able to move inwardly toward the second leg, and having the cover half and the housing. With respect to the side latches and the printed circuit board. The housing has front and rear surfaces and cutouts on the exterior upper surface to receive both cover halves. The lower portion of each second leg has a protrusion extending longitudinally toward both ends of the housing, the protrusion being received in a recess in the housing, and the cover half when the cover half is assembled to the housing. Prevents upward movement of the half. Both ends of each cover half have protrusions extending longitudinally toward both ends of the housing, the protrusions being received in recesses in the housing, and the cover being mounted when the cover half is assembled to the housing. Prevent lateral movement of the halves. Further, the main connector includes a cavity in each cover half facing the longitudinal center plane of the connector to receive the signal contacts and the upper portion of the ground bus and stripped wires of the flat cable. The main connector further includes means for connecting the side latches to the printed circuit board, the means being buttons facing down from each latch, each button being provided with a notch to easily retract and expand the button, thus providing a button of,
Facilitates insertion into, retention within, and removal from holes in printed circuit boards.

The invention further includes a combination for connecting a flat cable wire and an electrical connector. This combination consists of the signal contacts in the connector. Each signal contact has a downward U-shaped cut, and the bends in the cuts of the plurality of signal contacts have a semicircular cross-section having a common diameter about a parallel horizontal axis. The combination also includes signal wires parallel to each other in the plane of the flat cable. The signal wire has a circular cross section with a diameter smaller than the diameter of the bend. Each signal wire has a stripped free end, the free end having a portion bent approximately 90 degrees from the initial linear direction, the bent portion being close to the signal wire end remote from the plane of the flat cable. Contact with the curve of each signal contact.
Further, the combination includes a solder material for connecting each signal wire and the signal contact.

Each signal wire bent at about 70 degrees is covered with a solder material over at least about 270 degrees around its cross section. The signal contacts are on both sides of the flat cable surface, a portion of the signal wire bends toward the signal contact on one side of the cable surface, and the remainder of the wire is connected to the other side of the cable surface. Folded towards the signal contact on the side.
The assembly further includes a ground wire that extends downward between the signal wire from the flat cable and a ground bus in the plane of the flat cable to receive the ground wire.
The ground bus is formed as a conductive U-shaped member having two upward flange ends, the upper portion of which is adapted to crimp a downward ground wire.

The invention also includes a main connector detachably connected to the mating connector. The main connector includes a housing of an insulating material that receives the free end of the flat multicore signal transmission cable and has an opening having a strain relief function. The main connector also includes a plurality of parallel spaced apart conductive signal contacts supported on the first surface by the housing, the contacts being adapted to receive signal transmission wires within the housing. It has one end and a second end detachably connected to the mating connector. The main connector also includes a plate-like ground bus supported by the housing, the bus being detachably connected to a first end adapted to receive a ground wire in the housing, and to a mating connector. And a second end. The ground bus is in a second plane parallel to, but spaced apart from, the first plane by a ground bus and a signal contact transmitted from the first end to the second end of the signal contact through the connector. The characteristic impedance is controlled. Signal contacts are arranged on both sides of the ground bus and the second surface in two parallel first surfaces equidistant from the second surface. The ground bus receives every other ground wire in the cable and other wires in the cable that are not received by the ground bus are received by the signal contacts. The second of the ground bus and the signal contact
The end extends through the housing for insertion into a mating connector. The main connector also includes solder used to connect the signal contacts to the signal wires.

Further, the invention includes a method of connecting a flat cable wire to a signal contact. The method includes: (1) causing a plurality of signal contacts with a downward U-shaped notch having a semicircular cross-section curved portion having a common diameter about a parallel horizontal axis to be supported by a main connector; Preparing a signal wire having a circular cross section having a common diameter smaller than the diameter of the curved portion and extending parallel to the plane of the flat cable and having a peelable free end; (3) connecting the signal wire to the wire; Bend to 90 degrees or less from the vertical direction near the free end. (4) Support the bent portion in the main connector so as to make contact with the curved portion of the signal contact near the end far from the flat cable surface. (5) connecting the signal wires to the signal contacts.

The connections described above are made by using a solder material that is applied to the signal contacts by any of the techniques of plating, print printing, screen printing, dipping, inlays, and the like. It is preferable that the solder material is provided by plating the curved portion of the cut, and is reflowed and liquefied. The reflow is caused by liquefaction techniques such as high frequency, resistance, laser or vapor phase, but the use of high frequency is preferred. The ground bus is formed as a U-shaped metal member having an upward flange end. The method also includes means for crimping the U-shaped member on the downward grounding wire. The U-shaped ground bus is slidable longitudinally within the housing slot, and after crimping the ground wire to the U-shaped ground bus, the ground bus is moved such that the signal wire is close to the signal contact.

The method of the present invention is directed to a downward U having a curved portion with a semicircular cross section.
Means for supporting the signal contact having the notch in the connector. The method also includes preparing a signal wire having a circular cross section having a diameter not larger than the diameter of the curved portion and having a free end, and folding the signal wire near its free end by 90 ° or less from the initial direction. Means for bending and contacting near one end of the bent portion with a curved portion of the signal contact to support the signal wire in the main connector.

Embodiments The above description outlines important characteristics of the present invention, and will be easily and completely understood by those skilled in the art by the embodiments described below with reference to the drawings.

In the drawings, in particular in FIGS. 1 and 2, the electrical connector
10 is partially cut away to show the internal structure. The connector 10 includes a flat multi-core signal transmission cable 12 and a printed circuit board 16.
Is connected to the mating connector 14 fixed to the connector. The flat cable is formed from a flat member made of an electrical insulator 26 and a plurality of thin and very slightly spaced wires 20, 22, 24 embedded therein. The wires are parallel to each other and separated by an insulator 26. The ends of the wires in the connector are stripped and properly connected to the associated contacts.

As shown in FIGS. 1, 2, and 3, the printed circuit board 16 supports the mating connector 14 on its upper surface to receive the connector 10, and the mating connector and the printed circuit board are connected to each other. The remote electrical elements are interconnected with the remote conductive elements of the cable in the connector 10. Mating connector 14 front
28, a rear surface 30, end surfaces 32 and 34, a top surface 36, and a bottom surface 38. The bottom surface 38 is supported on the printed circuit board 16. An interconnecting contact element 40 is in the mating connector and is attached to a conductor on the printed circuit board. Top surface 36 of mating connector Other surface
28, 30, 32, 34 receive the lower surface 44 and inner surfaces 46, 48 of the main connector 10. The mating connector 14 also has holes 54, 56 extending between the top surface 36 and the bottom surface 38, and the conductive receptacle contacts 58 in the holes receive the contacts 60 of the connector 10. An electric current flows between the electric wires 20, 22, and 24 of the flat cable 12 and the conductor of the printed circuit board 16.

The connector 10 itself comprises a plurality of connectable components made of an electrically insulating plastic material. A preferred material is Artem 1000 (trade name of General Electric Kampani). These connectable components are provided in housing 62 adapted to be supported on mating connector 14.
And a front cover half 64 and a rear cover half 66 adapted to be received within the housing for securing the flat cable with respect to the housing. The connector 10 also fixes the cover halves 64 and 66, and
Includes a front latch 68 and a rear latch 70 for securing the printed circuit board 16 to the printed circuit board 16. The housing 62 also has a shape that supports the conductive signal contacts 60 and the conductive ground busbars 72 in the correct position with respect to the flat cable 12 and its wires and electrically connects the conductive segments of the mating connector 14. .

Before, after, above, below, horizontal, vertical, and the like terms used herein are merely illustrative. It will be readily understood that the connectors of the present invention may use terms such as vertical, horizontal or angular without departing from the scope of the present invention. Such terms are not limiting of the invention.
In addition, when a flat cable is received on the main connector 10, most of its length is in the connector 10, mating connector 14,
And in one plane which is the longitudinal center plane of the ground bus 72. Inner, outer and other terms also refer to this longitudinal center plane.

In particular, in FIGS. 1, 2 and 3, the housing 62 is a block-shaped member, and the front surface 76, the rear surface 78, the end surfaces 80 and 82, the lower surface 44, and the upper inner surface 84 are integrally formed by a molding operation. Created on the component. The housing includes a shelf-like block 88 projecting inward from each other, the upper surface of which forms an upper inner surface 84 of the housing. The blocks protrude inwardly toward each other in the longitudinal central plane of the connector and define a central slot 90 sized to receive a ground contact or ground busbar 72. The bus bar is a plate-shaped conductive member made of a conductive material, preferably a metal.
This bus bar is formed in a joined U-shape, and its free end is expanded to a certain extent upward and outward so as to receive the ground wire 20 of the cable 12 to form a crimp portion 92. Ground bus
The lower portion of 72 is received in the central slot 90 of the housing and is adapted to mechanically and electrically receive the selected wire 20 of the flat cable, especially the wire in the middle of the signal wire and acting as a ground. I have. Ground bus 72 is a slot
Within 90, it is movable from the position shown in FIG. 5 to the position shown in FIG.

Within block 88 of housing 62 is a vertical hole 94 for receiving signal contact 60. This signal contact is made of a conductive material, preferably metal, and has a substantially lower rectangular cross section post.
The upper portion 98 is rectangular in cross-section, including 96, and the upper portion is enlarged and is supported on the upper surface 84 of the block 88. The upper part has a solder connection (cut) 102 perpendicular to the longitudinal center plane of the connector. Each cut has a U-shaped or semi-circular lower portion for receiving a flat cable signal wire 22 or 24. Ground wire 20 and signal wires 22, 24
The stripped lower ends of the mating connectors are received by the ground busbar 72 and the signal contact 60, respectively, to mechanically and electrically connect the wires of the cable to the conductors of the mating connector, and thus the conductors of the printed circuit board, in a particular orientation in advance. Connected.

The signal wires 22, 24 and the ground wire 20 are mechanically and electrically fixed to the signal contact 60 and the ground bus 72 by first bending the stripped signal wire of the cable 12 as shown in FIG. 4B. A bending device suitable for accurately bending the signal wires 22, 24 is shown in FIG. 4A. This drawing shows only a part of the folding device, and shows only the device for arranging the electric wires. The device includes a plurality of relatively shiny positioning shims 284, each having a notch 298 having a width approximately equal to the thickness of the flat cable 12. The cuts 298 in each shim are aligned with each other. These shims are separated by a signal wire shim 286 and a ground wire shim 288.
Each ground wire shim 288 is aligned with the cut 298 and has a deeper ground wire cut (not shown). The upper line 212 of the signal wire shim 286 is below the notch 298. A plurality of folding fingers 260,272 are aligned with the grooves formed between the high positioning shim 284 and the signal wire shim 286. None of the bent fingers align with the ground wire shim 288. Bending finger 26
0,272 are arranged in a staggered pattern with respect to each other so as to move in near and far directions. The peeled end of the cable 12 is arranged such that the insulator is in the cut 298 and the wires 20, 22, 24 are between the positioning shims 284, and the bending fingers 260, 272 are moved inward, so that the signal wire 22 and 24 are bent as shown in FIG. 4B.

As shown in FIG. 5, the ground bus 72 slidably received in the ground bus slot 90 in the longitudinal direction of the ground wire 20 is
Although the crimping portion 92 is separated from the solder connection portion of the signal contact 60 disposed in the signal contact hole 94 of the housing 62, the free end of the ground wire 20 approaches the crimping portion 92. It is located at the position shown in the figure, that is, the first position.

At this position, the free end of the ground wire 20 is
Approaches 92 widening end. Here, the spread ends approach from both sides of the ground wire 20 and crimp the ground wire 20.

After the ground wire 20 is crimped to the ground bus 72, the ground bus is slid downward. Since the cable 12 is connected to the ground bus bar 72 by the above-mentioned crimping, the free ends of the signal wires 22 and 24 come into contact with the solder connection portion of the signal contact 60 in FIG.
That is, it moves to the second position. In the second position, the free ends of the signal wires 22 and 24 are soldered to the solder connection portions of the signal contact 60.

The front surface 76 and the rear surface 78 of the housing 62 have downward projecting legs.
104, and the housing also has downwardly projecting legs 106 near its opposite ends. These downwardly projecting legs extend approximately around the housing and the front surface 28 of the mating connector 14,
It is arranged to slide on the rear face 30 and the end faces 32,34.

A portion of the top outer surface of the housing is formed as a break 108 to receive the front and rear cover halves. Both cover radii have a similar shape and consist of an upper portion 110 located close to the upper outer surface of the housing and a pair of downwardly extending parallel legs 112,114. Inner leg 112
Are short, the inner surface of the leg is close to the longitudinal center plane of the connector 10, and the lower surface of the leg is supported by the upper inner surface of the housing. The outer leg 114 is long and the inner surface of the leg is spaced from the inner leg to form a gap between both legs.

The front and rear cover halves are symmetrical with respect to the longitudinal center plane of the connector 10, but the strain relief recesses 118 and associated strain relief protrusions 120 are each adjacent to the upper inner surfaces of both cover halves. The cable 12 is received and held to prevent possible movement when the cable is accidentally pulled during operation and use. Below the tension relief element of the cover half, a cavity for accommodating the signal contact 60 and the upper part of the busbar 72 and the lower stripped end of the flat cable wire.
There are 122. In operation and use, the end of the flat cable supported by the connector 10 is stripped to the extent that its non-stripped portion contacts the strain relief element of the cover half to provide the desired motion control. The lower stripped portion of the strain relief element of the flat cable is in the cavity 122 of the cover half.

The lower end of the outer leg 114 is provided with a protrusion 124 extending outwardly from the longitudinal center plane of the housing 62, the protrusion being a horizontal and upward facing for securing the position of the housing with respect to the printed circuit board during operation and use. It has a shelf 126. The upwardly extending air gap 116 between the inner leg 112 and the outer leg 114 causes the outer leg 114 to resiliently move within a limited range to attach and detach the connector 10 to and from the printed circuit board. Becomes easier.

Another element of the connector 10 is two similarly shaped side latches 68, 70 having a lower surface 130 supported on the upper surface of the printed circuit board 16. A downwardly protruding button 132 is formed on the lower surface of each latch and is received in a hole 134 in the printed circuit board 16. Each button 132 has an upward abutment surface and an axial notch 136 in the central area for contracting and lowering the lower end of the button into a hole in the printed circuit board and removing the latch and thus the connector 10. And flat cable
12 can be reliably mechanically attached to the printed circuit board 16. Shrinking the cut 136 in the button 132 allows the latch to be removed from the printed circuit board.

The leg 138 extending upward from the bottom of the latch
The projection 140 is provided with an inward projection 140 toward the longitudinal center line. This projection has a horizontal downward shelf 142 which is used to receive and hold the upward half 126 of the cover half. By arranging the cover half and the housing in the mating connector, the cover half fixed to the latch is connected to the connector.
10 can be fixed with respect to the mating connector and the printed circuit board.

The lower portion of the first or inner leg 112 of each cover half has a projection 144 extending in the plane of the leg toward the end of the housing 62 and in a direction longitudinally far from each other. There are a total of four of these protrusions which are received in correspondingly shaped recesses 146 on said and rear surfaces of housing 62. When these projections and recesses are connected, the cover halves prevent upward and downward movement with respect to the housing. Similarly, each cover half has a total of four protrusions 148 at both ends thereof, toward the ends of the housing and away from each other. A correspondingly shaped recess 150 in the housing can receive these protrusions. When the cover half is connected to the housing, the aforementioned projections and recesses prevent the cover half from moving laterally with respect to the housing in a horizontal plane.

After connecting the stripped cable ends to the signal contact 60 and the ground busbar 72, the front cover half 64 and the rear cover half 66 are simply held parallel to each other close to the flat cable, and the two cover halves are separated. It can be connected to the housing 62. The two halves of the cover are brought close to the flat cable 12 simultaneously or sequentially, while holding the two halves parallel to each other. Both cover halves with end projections 148
It snaps easily with 50 and is properly positioned with respect to housing 62. To remove the two cover halves, the upper ends of the housing may be pulled outward from each other in the longitudinal center plane. This pulling motion causes the two cover halves to move in a direction opposite to that at the time of connection, and is separated from the flat cable and the housing 62, so that the cover halves are separated from the recess.

The front surface 28 of the mating connector 14 includes two upwardly extending parallel plugs 156. Similarly, the front face 76 of the housing 62 has two downwardly extending parallel slots 154. Since these plugs and slots are equally spaced from each other and have approximately the same width, connector housing 62 can mate with mating connector 14. These plugs and slots are only on one side of the connector housing and the mating connector, respectively, and are in a fixed position, so that the housing 62 and the connector 10 will not be misaligned with respect to the mating connector 14. Therefore, it is impossible to connect the connector 10 and the mating connector in opposite directions.

In normal operation, every other connector wire 20 of the flat cable 12 is a ground wire and is received by the ground bus 72, and all intermediate connector wires 22, 24 of the cable carry signals from the cable to the printed circuit board. It has become. Thus, all signal wires need to be bent outward toward the appropriate signal contact 60 on one or the other side of the longitudinal center plane. In this manner, the appropriate wires of the flat cable can be connected to the appropriate conductors of the printed circuit board to perform the desired function of the connector.

The housing, in which the cable wires to be connected to the signal contacts are correctly positioned, is then heated by high-frequency energy to liquefy the solder material between the signal contacts and the signal wires, and to make a reliable solder connection between them. .

In particular, as shown in FIGS. 3, 4A, 4B and 7, the signal wire of the cable is bent to nearly 90 degrees from the vertical. As shown in FIG. 8, by bending about 70 degrees, the end of the signal wire remote from the bent portion comes into contact with the end of the signal contact far from the central plane in the longitudinal direction. When the signal wire end is pressed down during connection, it is pushed slightly upward by more than 70 degrees by the signal contact to make complete contact between the signal wire and the signal contact. The upward displacement of the wire is about 5 to 20 degrees, but is preferably 90 degrees or less. This wire shift movement ensures physical contact between each signal wire and the signal contact before solder connection.

The U-shaped notch of the signal contact 60 has a flat cable 12
Is preferably equal to or slightly larger than the diameter of the conductors of the signal wires 22, 24. In this way the solder is at least about
Bent over 270 degrees and surround the electric wire and make electrical connection by mechanical bonding. In practice, the solder material often surrounds the entire cross section of the signal wire along its entire length. It is known that, contrary to the above concept, it is not necessary for the wire to be mechanically interrupted in the cut to be soldered, and therefore it is preferred that the diameter of the wire is not greater than the width or diameter of said cut.

In a preferred embodiment, the solder material may be adhered to the appropriate portions of the signal contacts by any of a variety of techniques, such as plating, print printing, screen printing, dipping, inlays, and the like. Alternatively, a solder material may be plated on the upper end of the signal contact to cover at least the U-shaped cut. Soldering is more effective by applying a commercially available flux material to the end of the stripped wire. The solder may be reflow soldered by various heating methods including high frequency, resistance, laser, or vapor phase. In particular, high frequency is the preferred method.

According to the flat multi-core signal transmission cable connector of the present invention, the signal and ground wires of the flat multi-core signal transmission cable having a large number of signals and ground wires can be easily connected to the signal contacts and the ground bus, respectively. In particular, after the ground wire is crimped to the ground bus, the signal wires can be connected together by high-frequency energy. In this connection, the ground bus is slidably disposed from the first position in the longitudinal direction of the ground wire to the second position in the ground bus slot of the housing, and is grounded when the ground bus is in the first position. The wire is crimped to the ground bus, and the signal wire is soldered to the signal contact when the ground bus moves to the second position, so that different crimping and soldering connection operations are efficient and smooth. Has effects that can be performed.

Further, since the signal contacts are disposed in the signal contact holes formed in a row at a certain distance from the ground bus slot, the signal contacts can be located at a certain interval from the ground bus, and can be specified. This has the effect that the impedance can be controlled.

[Brief description of the drawings]

FIG. 1 is a perspective view of a main connector of the present invention at a position for supporting a flat cable and connecting to a mating connector, and FIG. 2 is a partially cutaway main connector shown in FIG. 1 connected to the mating connector. FIG. 3 is a cross-sectional view of the apparatus shown in FIG. 2 passing through the center of the main connector, the mating connector, and the flat cable, and FIG. 4B shows an apparatus for bending the ground wire as shown in FIG. 4B, FIG. 5 is a cross-sectional view showing the crimping of the ground wire to the ground bus, and FIG. FIG. 7 is a cross-sectional view similar to FIG. 5 showing that the signal contact is brought near the signal contact, FIG. 7 is a perspective view showing that two signal wires and the signal contact are connected with a solder material, and FIG. Initial position of signal wire connected to signal contact by solder material Sectional view showing the ninth and final positions, ninth
FIG. 10 and FIG. 10 are cross-sectional views of a signal wire and a signal contact including a solder material taken along lines 9-9 and 10-10 of FIG. 8, respectively. 10 Connector (main connector) 12 Flat multi-core signal transmission cable 20 Ground wire 22, 24 Signal wire 60 Signal contact 62 Housing 72 Ground bus 90 For ground bus Slot 92 Crimp part 94 Signal contact hole 102 Solder connection (cut)

Claims (2)

(57) [Claims] An insulator at one end of a flat multi-core signal transmission cable in which a plurality of signal wires and a ground wire are arranged substantially in parallel in a substantially flat insulator is peeled off and extends in a longitudinal direction of the transmission cable. A flat multi-core signal transmission cable connector in which a free end of a ground wire and a bent free end of the signal wire are connected to a ground bus and a signal contact of a housing, respectively, wherein the housing connects the ground bus to the ground wire. A ground busbar slot slidably received in a longitudinal direction, and a plurality of signal contact holes formed in a row at a predetermined distance from the ground busbar slot, the free end of the ground wire Is crimped to a crimping portion of the ground bus slidably received in the ground bus slot, and the bent free end of the signal wire is disposed in the signal contact hole. Connector for flat multiconductor signal transmission cable, characterized in that the solder connecting portions of the signal contacts are solder connections. 2. A flat multi-core signal transmission cable in which a plurality of signal wires and ground wires are arranged substantially in parallel in a substantially flat insulator, and the insulator is peeled off from one end of the flat multi-core signal transmission cable and extends in the longitudinal direction of the transmission cable. A method for manufacturing a connector for a flat multi-core signal transmission cable by connecting a free end of a ground wire and a bent free end of the signal wire to a ground bus and a signal contact of a housing, respectively, wherein a slot for the ground bus of the housing is provided. The crimping portion of the ground bus bar slidably received in the longitudinal direction of the ground wire within the housing is separated from the solder connection portion of the signal contact disposed in the signal contact hole of the housing. And crimping the free end of the ground wire to the crimp portion of the ground bus at a first position where the free end of the ground wire approaches the crimp portion of the ground bus. The free end of the signal wire is moved to a second position where the free end of the signal wire contacts the solder connection portion of the signal contact by sliding the bus bar, and the free end of the signal wire is brought into the signal contact at the second position. A method of manufacturing a connector for a flat multi-core signal transmission cable, wherein the connector is connected to the solder connection portion of a slave.