JP2579149B2 - Electrical connector - Google Patents

Description

The present invention relates to the field of electrical connectors, and more particularly to the field of double row connectors for transmission cables.

Double row receptacle connectors for flat transmission cables are known and include a connector assembly that mates with a two row pin array. Such a connector assembly passes adjacent closely spaced signal conductors of a flat cable through terminals on alternating sides of the connector, while passing the associated ground conductors through an earth bus contained in the connector.

U.S. Pat.No. 4,260,209 discloses a connector of this type for performing a batch termination of a flat transmission cable, the receiving terminal for a signal conductor of which has a slotted beam-type termination section, and the conductor is removed by insulation exclusion. Terminated. Similarly, the ground conductor is fixed to the slotted beam of the ground bus, the receiving terminal and the ground bus are arranged along respective recesses of the housing, to which the conductor of the cable is terminated and covered on the termination. And a stress relief member is attached to the assembly. This connector allows selective programming of the ground terminal by connecting the selected receptacle terminal to the case bus instead of to the signal conductor by a ground bar or by a sacrificed signal conductor.

U.S. Pat.No. 4,269,466 discloses another double row receptacle connector for flat transmission cables, the terminals of which are arranged in grooves along opposite sides of the housing member, and each signal conductor is slotted beam type by insulation elimination. Termination into termination sections (plural). The cover members are mounted on both sides of the housing and are locked to the housing at the front end and locked together at the rear end to prevent stress on the cable. The ground busbar engages the ground conductor (s) by a plurality of slotted beam-type termination sections. To select and program the ground terminal of this connector, the ground busbar can be provided with a selected termination section to engage the sacrificial signal conductor by insulation exclusion, from which the signal conductor can be moved forward. Proceedingly, it engages with each of the socket contacts serving as ground terminals.

European Patent Application No. 83306740.8, Publication No. 0112019 discloses an electrical connector for an individual transmission cable with minimal impedance discontinuities. The connector comprises a row of plug contact sections extending forward from a dielectric contact carrier, one side of the contact carrier having a signal contact terminated to a signal conductor and the other side having a ground. An earth plate that terminates the conductor is attached. An insulative cover is overmolded around it to seal the laser welded terminations and extend along the cable to relieve stress. Signal contact classification (multiple) of ground plate
The contact section extends forward from the selected position which is aligned with the contact section.

SUMMARY OF THE INVENTION It is desirable to provide a double row receptacle connector with programmable grounds.

It is also required to provide such a connector for an individual signal transmission cable.

Furthermore, it is desirable to provide this type of connector for high speed and high reliability signal transmission in preparation for minimizing impedance discontinuities.

Still further, this type of connector has a dielectric cover which seals the conductor / terminal connections and adjacent portions of the insulated conductor cable (s), holds the terminals (s) immovably, and secures the cable (s). It is desirable to provide a connector that performs spacing and stress relaxation of cables without deformation, and provides spacing and support when using individual cables.

Means for Solving the Problems According to the present invention, in an electric connector for an electric signal transmission cable including a signal conductor and a ground conductor, a plurality of terminal receiving passages formed in a plurality of rows from a front end to a rear end. A plurality of terminals terminated to a signal conductor of the electric signal transmission cable are arranged in a plurality of grooves formed in parallel on one surface, and a plurality of terminals are arranged on the other surface to a ground conductor of the electric signal transmission cable. A plurality of flat terminal assemblies formed by integrally overmolding a contact holding member on which a ground plate to be terminated is disposed and an end of the electric signal transmission cable with a dielectric; The terminal contact section extending from a front end of the terminal assembly and being inserted into the front housing and superposed on each other, and disposed in the terminal receiving passage; Electrical connector is provided, characterized in that fixed to each other by a latch member formed at both ends of the housing and the terminal assemblies.

According to another aspect of the present invention, in an electrical connector for an electrical signal transmission cable including a signal conductor and a ground conductor, the electrical connector includes a plurality of terminal receiving passages formed in a plurality of rows from a front end to a rear end. A housing, a contact carrying portion integrally formed in a plate shape at a rear end central portion of the front housing, a plurality of grooves on both surfaces and a tapered surface formed at the rear end of the groove, A plurality of terminals arranged in a groove, each of which is deflected by the tapered surface, and which is terminated to a signal conductor and a ground conductor of the electric signal transmission cable; and a contact-carrying portion and an end of the electric signal transmission cable. And a cover member formed by pressing over with a mold and integrally overmolding with a dielectric material.

Embodiment In a first embodiment of the invention, each row of terminals is mounted on a separate contact carrier. The terminals in the contact position, called signal positions, are terminated to the signal conductors of each row of transmission cables, and the terminals in the ground position are welded to a ground plate terminated to the ground conductors of the cable, and are thus constructed. The terminal subassembly is overmolded with a dielectric material. The contact section of each receptacle contact terminal extends forward of the overmolded cover member and is received in a corresponding passage in the front housing. When an individual cable is used, the dielectric cover also serves to space the cables. The invention can also be used with ribbon cables.

Prior to overmolding of the terminal assembly of the first embodiment, the terminal subassembly is completed as follows. The exfoliated end of the signal conductor is passed through a groove in one side of the dielectric contact carrying member to which the terminal is attached, and the signal conductor is then laser welded to the respective signal terminal. One or two stripped ground conductors associated with each signal conductor are routed through a slot on the other side of the dielectric contact carrier carrying one ground plate. These ground conductors are laser welded to the ground plate.

At a pre-selected location along the front end of the ground plate, electrical connections are made to the terminals to form ground terminals, the integral receptacle contact section of which extends forward from the overmolded terminal assembly and receives the signal terminal receptacle contacts. Laterally aligned with the section will be received in the passage of the front housing. The position of the ground contact section in one of the terminal assemblies is independent of the position of the ground contact section in the other assembly.

The terminal assemblies of the first embodiment can be interconnected prior to assembly to the front housing by one or two protrusions extending from each assembly and passing through slots between conductors of the other assembly. After that, it is fixed with a cold pile. These assemblies may be provided with lateral latching projections at the front end to latch into corresponding lateral latches on the front housing. Also, to retain the receptacle contact section in the terminal receiving passage, for example, a normal rearward lance of the terminal may be engaged with the front upper surface of the side wall of the passage and the terminal front end may be engaged with the rearward stop surface of the front end of the passage. Removal of the assembly
This can be done at any time by inserting a tool with a protrusion from the mating surface to depress the terminal lance or to extend the housing side latch outward and then pulling back on the assembly.

In each terminal assembly according to the first embodiment of the present invention, an opening is provided in a ground plate facing each signal contact, the terminal is embedded in a subassembly to be immovably held, and a non-deformable cable stress relief is provided. Provides a reduced impedance discontinuity for each row of conductors and terminals. The stress relief maintains precise spacing of the associated cables when using individual cables. The present invention also provides high robustness laser welding of conductors to contacts and sealing protection of terminations.

In a second embodiment of the invention, the connector includes a preformed front housing having a contact receiving portion and a contact bearing portion extending rearward from a median plane of the portion.
Two rows of terminal receiving passages extend rearwardly from the mating surface of the front housing through the contact receiving portions of the housing, and the grooves run along both upper and lower surfaces of the contact carrying portions of the front housing in alignment with the passages.

The socket contact terminal is first mounted in the front housing, the contact section is fixed in the passage, the body section and the termination section are located behind it along the groove, and the signal terminal alternates with the ground terminal in each row. I do. Each signal terminal is opposed to one ground terminal in the opposing row, which is respectively terminated with the signal terminal of the associated transmission cable and one or two associated ground conductors. The signal conductor is preferably held in the section along the slotted termination section of the signal terminal by an interference fit and then connected thereto by laser welding. The one or two ground conductors are likewise held in the slotted termination section of the ground terminal in an interference fit within the section and then laser welded thereto. The transmission cable is
It is arranged in a single row extending rearward from the front housing through the median plane of its contact bearing portion.

Here, behind the contact receiving portion of the front housing, a moldable dielectric material is sealed over the contact carrying portion and the conductor / terminal termination and along the insulated portion of the transmission cable for stress relief. A dielectric cover member is formed which is molded into a stop shape to seal the termination and hold the terminal immovably. If individual cables are used, preferably a second transverse stress relief member is formed during molding of the cover member and separated from the cover member by a selected distance rearward along the transmission cable and each end of the cable train The second stress relief member and the cover member are integrally connected by a web section extending in the longitudinal direction.

The stress relief provided by the present invention does not deform the transmission cable as in other conventional stress relief schemes. The placement of alternately facing signals and ground terminals minimizes impedance problems. Termination is performed by laser welding with high solidity and then sealed.

In the double row connector of the present invention, a plurality of low-profile connectors may be arranged in parallel and electrically connected to a multi-row pin array of a printed circuit board, or may be arranged in a single vertical row to be joined to long multiple pins. Can be. The double-row connector of the present invention can be used for various transmission cables such as a ribbon cable, a coaxial cable, and a two-lead cable.

The electrical connector of the present invention, connector assembly (200), is shown in FIG. It comprises a front housing (10) and a pair of flat terminal assemblies (12). The two assemblies (12) are engaged by the latch members (14, 18). That is, each assembly (12) is attached to the front housing (10) by engaging the latch projection (14) on the side surface of the front end (16) with the latch arm (18) of the front housing (10). The box-shaped receptacle contact section (20) of the electrical contact terminal (22) extends in a row forward from the front end (16) of each assembly (12) and is received in the terminal receiving passageway (24) of the housing (10). Preferably, as shown in FIGS. 9 and 10,
A lock lance (2) that engages the stop surface (28) in the passage (24)
It should be fixed in the passage (24) by 6) or the like.

One line of the electric transmission cable (150) has its signal and ground conductors terminated to terminals (22), and each unassembly (1) is terminated.
2) Extending backwards. Each terminal assembly (12) is molded over the terminal subassembly, including the terminal (22), the signal and ground conductor termination thereto, and the respective portions described in detail below, such as the end portion of the transmission cable (150). And a cover member (30). The connector assembly (200) is capable of mating with two rows of pin contacts of a pin array on a printed circuit board (not shown), and has a front housing (10) for properly mating a shroud member around the pin array. The key configuration (32) is shown.

The terminal assembly (12) preferably inserts one or more relative vertical protrusions (34) on each assembly into the axial slots (36) in the other assembly concerned before latching into the front housing (10). After the free end (38) is protruded from the remote surface of the other assembly, the free end (38) is cold-stuck or deformed (caulked) to the remote surface as shown in FIG. 11A. First, they can be attached and connected to each other.

FIG. 2 shows a terminal sub-assembly (40), which is overmolded with a cover member (30) to form a terminal assembly (12). Dielectric contact carrier (42)
Are molded from a suitable material, with grooves (44) spaced at their relative upper surfaces (46) to provide conductor positioning sections (48) from the front end (48) to the rear end (52) of the contact carrier (42). 50) has been reached. The terminal mounting projection (54) rises from the groove bottom (56) near the front end (48). The relative lower surface (58) of the contact-carrying member (42) has a flat shape in front of the conductor positioning section (50), and extends downward near the front end (48) of the flat lower surface (58). 60) As shown in FIG. The ground plate (62) is attached to the lower surface (58) by the projection (60), as described later.

2 to 4, the terminal (22) is preferably stamped and formed from a copper alloy 725. Each terminal (2
2) The middle section (6
4), having a diagonally upward section (66) and a mounting section (68), and a conductor connection section (70) at the rear end. The mounting section (68) and the conductor connection section (70) of each terminal (22) are arranged only in relation (44), that is, in the terminal holding groove. The mounting section (68) has a hole (72) corresponding to the mounting projection (54) in the groove (44), through which the projection (54) passes. Protrusions (5
4) The tip is cold-stake-fixed (if necessary, hot-stake-fixed) on the mounting section (68), and the enlarged end (74) of the
Is fixed to the upper surface (46) of the contact holding member (42). In this way, the diagonally upper section (66), middle section (64) and contact section (20) of each receiving terminal (22) are located at the front end (48) along the longitudinal axis of the terminal (22) and groove (44). Extending forward of
The conductor connection section (70) is located near and forward of the conductor locating section (50) of the contact carrier (42).

In FIGS. 2 to 4, the ground plate (62) has a long flat plate section (76) from which a tab section (78) extends slightly obliquely forward and downward, and extends horizontally from each tab section. The short tab tip (80) extends. The tab section (78) is formed at a preselected position (plural) as dictated. Preferably, the conductor connection section (84) along the rear end of the ground plate (62) comprises a folded portion of a metal material in which the ground plate (62) is stamped and the rear end is a curved section (82). A plurality of holes (86) are provided across the flat plate (62) near the front end of the ground plate (62), and the lower surface (58) of the contact holding member (42) is provided.
Mounting projections (60) respectively. Ground plate (6
2) Pass the mounting protrusion (60) through the hole (86) and
8) is deformed and expanded by a cold pile stop (if necessary, a hot pile stop), and is fixed to the lower surface (58) by caulking to the lower surface of the ground plate (62). The tab section (78) extends forward of the front end (48) of the contact carrier (42) in the subassembly (40). Preferably, the ground plate (62) also has an opening (142) at a position opposite to the mounting section (68) of the plurality of terminals (22) after construction of the terminal subassembly (40). These openings (142) increase the insulation spacing between the signal terminals and the ground plate in the finished terminal assembly to aid impedance matching.

The connector assembly (200) can have a ground contact at any position in either row, and the ground location in one row is independent of ground as the signal location in the other row and is independent of ground. Program becomes possible. With reference to FIGS. 2 and 5, the tab section (7
8) is integral with the ground plate (62) and is installed at a selected position where grounding is required in the connector assembly (200). Preferably, this positioning is performed by forming tab sections at all positions and cutting off unnecessary portions for grounding. Behind these ground positions, no signal conductors intended for signal transmission are arranged. For example, in the case of ribbon cables, even if signal conductors are placed at their ground positions, they are not used for signal transmission and are abandoned. When individual electric cables are used as in the illustrated example, no cables are installed at the above-mentioned ground position. However, the terminal (22) is located at such a ground position and is mounted on the upper surface (46) of the contact carrier (42) so that the intermediate section (64) is welded to the tab tip (80). As shown in FIG. The tab tip (80) is preferably provided with a semicircular recess (90) as much as possible to increase the strength of the weld (92). Thus, the terminal (22) comprises a ground contact section for electrically connecting the ground plate (62) to the associated ground pin of the pin array. In FIG. 4, the terminal (22) is the tab section (78) of the ground plate (62) or the tab tip (80).
Are not welded or engaged and are separated to the side.

The cable (150) shown here has one signal conductor (1
This is a three-lead transmission cable having an outer insulating jacket (156) having a cross section of 52) and two ground conductors (154) separated to the side thereof. Other types of transmission cables, such as individual round cables, coaxial cables with one ground conductor, three-lead cables with foil shields in the inner and outer jackets around the signal conductor and around the ground and insulated signal conductors, multiple Ribbon cables with the signal and associated ground conductors can also be used in the present invention. The cable (150) is ready for termination by removing the insulating outer jacket (156) from its end to expose the signal and ground conductors.

As shown in FIGS. 4 and 6B, the cable (150)
Are located in the plane of the contact carrying member (42), and the signal conductor (152) and the ground conductor (154) are relatively deflected upward and downward, respectively. The signal conductor (152) is further along the respective signal groove (94) of the conductor locating section (50) of the contact-carrying member (42) and further forward near the signal terminal (22) near the upper surface (46) of the member (42). ) Are arranged and terminated along respective conductor connection sections (70). The signal groove (94) has a bottom surface (96) that slopes upward from the rear end (52) all the way. Service entrance (98) is related signal conductor (152)
Grooves (94) are chamfered at the corners to facilitate insertion.

The conductor connection section (70) of each signal terminal (22) preferably has a narrow conductor receiving slot (100) as shown in FIG. 6A.
Preferably, the slot (100) is narrower than the diameter of the signal conductor (152), so that the signal conductor (152) is press-fitted into the slot prior to laser welding the conductor to the terminal. It can be kept in the fitted state. The slots (100) are spaced apart from the opposite end faces (10
The free ends of the tabs on both sides are bent around during the molding of the terminal and approach each other near the upper surface of the blank. Here, one signal conductor (152) is held in an interference fit below the upper end of the slot (100) between the end faces (102) by its light spring action, and then welded as shown in FIG. 6B. (104) is welded to the conductor connection section (70). The upper edge of the slot (100) should be smooth to facilitate conductor reception, and the slot (10)
Preferably, 0) is provided with a tapered inlet (106).

Similarly and preferably simultaneously, a pair of ground conductors (15
4) is deflected relatively downward and forward along a pair of respective ground grooves (108) extending forward from the rear end of the contact holding member (42), as shown in FIG. Each pair of ground grooves (108) converge into a single wide main ground groove (110) along the lower surface (58) of the conductor locating section (50). Each pair of adjacent ground conductors (15
4) Ground plate (62) along the main ground groove (110) in front
The conductor connection section (84) is arranged in parallel up to the relevant portion and terminated. Conductor connection section (8
4) has a plurality of slots (112) communicating with respective openings (114) of the kyphosis section (82), the openings (114) being narrower and mating with the slots (112). Each slot (1
12) The width of the ground conductor (154) is preferably smaller than twice the diameter of the ground conductor (154), and the pair of ground conductors (154) is press-fitted into the slot (112) before laser welding to the ground plate, and is in a tight fit. It is preferable to be maintained at
Each slot (11) is set in the flat plate section (76) of the ground plate (62).
A dimple-like projection (116) is projected toward the center of
A pair of adjacent ground conductors (154) can be accurately and easily arranged in slots (12) along the outer surface of the conductor connection section (84) and then welded to the ground plate (62) by welding (118). It is good to do so. The upper edge of the slot (112) is preferably smoothed to facilitate insertion of the conductor pair.
When two ground conductors are inserted into one slot (112), the number of slots and the number of welded connections are reduced by half.

The signal conductor and the ground conductor are preferably laser welded to the respective conductor receiving sections of the terminal and the ground plate. Laser welding is generally known and is described in “Material Processing Logic and Practice”, Volume 3, “Laser Material Processing” (1983, North Holland Publishing Company, M. Bath (Bas
s), specifically discussed in Chapter 3 “Laser Welding” (Mazumder, pp. 113-200). In particular, laser welding in electronics is described in a paper entitled "Dual Laser High Speed Termination of Flexible Printed Wiring" by Henderson, Electronics, September 22, 1981, pp. 149-154.

Next, referring to FIG. 8, the terminal subassembly (40)
Is inserted into the mold cavity with the contact section (20) and the cable (150) extending outward. A dielectric molding material is injected into the mold cavity, and the dielectric cover member (30) is overmolded on the contact holding member (42). The cover member (30) is an end portion of the cable (150), a conductor (152) and a conductor connection section (7) of the terminal (22) by welding (104) thereof.
0), the earth conductor (154) and its end to the conductor connection section (84) of the earth plate (62) are sealed and protected. In addition, the cover member (30) has the whole of the ground plate (62) and the welding portion (92) of the tab tip (80) to the terminal (22) selected as the ground, and the intermediate section immediately behind the contact section (20). The entire terminal (22) starting from the center of (64) is sealed and protected. The cover member (30) supports the transmission cables (150) by sealing and embedding the end portions thereof and preparing for their stress relief. Also, during the overmolding process, the downward projection (34) and the corresponding slot (36)
In addition, a lateral latch projection (14) is formed. Optionally,
It may also be desirable to form the cross bar for the second cable stress relief, as shown in FIG. 13, connected to the cover member (30) in a web section, or as in the aforementioned European Patent Application No. 83306740.8. The cover member (30) may be provided with a downward tapered surface (120) running across the front end (16) of the terminal assembly (12).

9 to 11B show the final assembly process of the connector assembly (200). A pair of terminal assemblies (12) are formed by passing the projections (34) of each assembly (12) through the corresponding slots (36) of the other assembly and expanding their free ends (38) by cold stakes or the like. The connection is fixed.
That is, the projection (34) and the slot (36) constitute an engaging member for engaging the pair of terminal assemblies (12) with each other. This pair of terminal assemblies (12) is pushed into the front housing (10) so that the contact sections (20) of the terminals (22) enter the corresponding terminal receiving passages (24) where they are locked by lock lances (26) or the like. Fixed individually. Each locking lance (26) extends rearwardly and engages a front facing surface (28) of a corresponding wall of a corresponding passage (24). The front end (112) of each contact section (20) will engage a rearward stop surface (124) near the front end (126) of the passageway (24) leading to the mating surface (128) of the front housing (10). Tapered surface of horizontal latch (14) (13
0) facilitates outwardly squeezing the corresponding housing latch arm (18) having the bevel (132). The latch surface (134) of the lateral latch (14) latches behind the corresponding latch surface (136) of the latch arm (18).
A cavity (138) extending rearward from the mating surface (128) of the front housing (10) facilitates molding of the latch surface (136). The upper and lower tapered surfaces (120) of the pair of assemblies (12) are engaged with the corresponding housing tapered surfaces (140) to facilitate insertion and lightly tighten the two assemblies (12) in the front housing (10). Give a fit. The pair of terminal assemblies (12) unlatches all locking lances (26), unlatches the latch arms (18), and pulls both assemblies (12) backwards from time to time. Can be removed.

A connector having two or more rows of contacts and independently programmable grounds is such that an equal number of single row terminal assemblies can be integrated and coupled so that their contact sections extend into the front housing and can be mated with mating terminals. Can be obtained. It is also possible to provide a plug connector in which the front housing is a shroud and the contact section is a plug section or a pin contact section. Furthermore, it is possible to integrate a plurality of connectors of the present invention and connect them to two or more rows of pin arrays by utilizing the low-profile characteristic of the present invention without providing the key structure (32).

FIG. 12 shows the components of a terminal subassembly (210) according to a second embodiment of the present invention, including a preformed dielectric front housing (212) and a plurality of receiving signal terminals (214). , A plurality of receiving ground terminals (216), and a plurality of transmission cables (218) associated with one signal terminal (214) and a ground terminal (216) facing each other. FIG. 13 shows the state after the terminals (214) and (216) are fixed to the passage (222) of the front housing (212) and the respective conductors of the cable (218) are terminated to the terminals (214) and (216). The completed electrical connector of the present invention, that is, the connector assembly (300) is obtained by overmolding a dielectric molding material on the terminal subassembly (210) of FIG. 12 to form an insulating sealing cover member (220). Show. The front housing (212) may be provided with a key arrangement (268) for proper mating with a pin shroud (not shown) on a printed circuit board surrounding the pin array to be mated with the connector assembly (300). .

In FIGS. 12 and 14, the socket terminals (214), (2
16) is preferably stamped and formed from a copper alloy 725, and has the same box-shaped contact section (224), the same flat body section (226), and similar conductor connection sections (22).
8) and (230). The contact section (224) is received in a terminal receiving passageway (222) that communicates with the mating surface (232) of the front housing (212) and extends rearward therefrom. The flat body section (226) is adapted to receive the contact receiving portion (24) of the front housing (212).
0) which is integrated with the front housing (212) extending rearward from
The contact carrying portion (238) is located along the bottom surface (234) of the groove (236). Each groove bottom surface (234) extends continuously rearward from the inner wall (242) of the associated passageway (222), as best seen in FIG.

The receiving terminals (214) and (216) extend rearwardly and outwardly from the contact section (224) at a selected angle with a locking lance (24) on that section.
Attached to each passage (222) by 4). When the terminals (214) and (216) are fully inserted, their locking lances (24
4) is a forward facing stop (246) along the chosen passageway sidewall (248), as best seen in FIGS. 18 and 19.
To prevent the terminals (214) and (216) from moving backward in the axial direction. The front ends (250) of the terminals (214) and (216) are engaged with the rearward stop surface (252) near the front end (254) of the passage (222), and the axial direction of the further terminals (214) and (216) Prevent forward movement. The front end (254) of the passage is beveled to be squarely connected to a pin array on a pin array on a printed circuit board or the like, that is, a square pin to be electrically connected to the socket type signal terminal (214) or the ground terminal (216) (FIG. (Not shown). The recess (256) is molded along the selected passage side wall (248) in front of the stop (246) to facilitate molding of the stop (246) and to remove the terminal during assembly if the terminal is to be removed. The tools for releasing the latch lances (244) and the latches (214) and (216) are received. At the rear end of each passage (222) is a rear recess (258) for receiving a core pin of the type described below.

The signal terminal (214) and the ground terminal (216) are alternately inserted in each row during insertion of the terminal into the passage (222) of the front housing (212), and the signal terminal (214) in one row is in the other row. It faces the ground terminal (216). Each pair of signal terminals (214) and ground terminals (216) are associated with each transmission cable (218). Each cable (218) has one signal conductor (260) and two ground conductors (262), one on each side remote from the signal conductor, and an insulating outer jacket around them. (264) is a rectangular section. Each cable (218) is prepared for termination by stripping the outer jacket (264) from the end to expose the signal (260) and ground (262) conductors.

The terminal subassembly (210) is configured as shown in FIGS. In FIG. 15, the signal terminal (214) is mounted in the upper passage (222A) to receive the signal conductor (260) of the cable (218) in its conductor connection section (228), and the ground terminal (216) is connected to the lower terminal (216). Attached to passageway (222B), its conductor connection section (230) receives both ground conductors (262) of cable (218). The signal conductor (260) deviates relatively upward from the median plane through the contact bearing portion (238) of the front housing (212) and the cable (218) and a tapered surface (236A) at the rear end of the associated groove (236A). Entering the narrow slot (270) of the conductor connection section (288) of the signal terminal (214) along 266), as shown in FIGS. 16 and 20. The slot (270) is narrower than the diameter of the signal conductor (260), and the signal conductor (260) is pressed into the slot (270) before laser welding to the terminal of the signal conductor (260) to maintain an interference fit. It is preferred to be able to The slot (270) may be defined by spaced apart opposing end faces (272) of a stamping tab extending laterally from both sides of the terminal blank. The free ends of both tabs are bent close to the top surface of the blank during terminal molding and brought closer together. Here, one signal conductor is placed along the slot (270), and is kept in an interference fit by a slight spring action between the opposite end faces by the opposite end face (272) near the upper end of the slot (270). 20 and then welded to the conductor connection section (228) at the weld (274).
As shown in FIG. The upper edge of the slot (270) is preferably as smooth as possible to facilitate receiving the conductor therein and is preferably formed with a tapered entry (276) in the slot (270).

Similarly and preferably simultaneously, a pair of ground conductors (26
2) is deflected relatively downward from the median plane and the upper groove (2
Tapered surface (278) at the rear end of the lower groove (236B) opposite to 36A)
Along. The two ground conductors (262) are brought together and extend forward (as best shown in FIGS. 19-21 for the cable (218B)) and the slot (280) in the conductor connection section (230) of the ground terminal (216). Line up along. Slots (28
The dimension of 0) is smaller than twice the diameter of the ground conductor,
A pair of ground conductors (262) are located near the upper end of slot (280) as shown in FIGS. 16 and 20.
The opposing end surfaces (282) that define 0) are held in tight fit by a slight spring action between the two end surfaces and are laser welded to a conductor connection section (230) at a weld (284). You.

The terminal subassembly (210) as shown in FIG. 16 is then molded, as shown in FIG. 17, to overmold a cover means (220) therearound to form an electrical connector assembly (300). Inserted into the mold (400). In the mold (400), core pins (plural) (402) are installed at the relatively forward end of the mold cavity,
Core pins (404) are located relatively near the rear end of the main cavity portion (406). Front core pin (402)
Enters the rear recesses (258) of the upper and lower walls of the front housing (212), engages the flat body sections (226) of the terminals (214) and (216) and engages them with the grooves (23) during the overmolding operation.
4) Press and hold. The front core pin (402) is recessed (25
8) Fully fit between both sides of the insulation material
4), help prevent entry into the receptacle contact section (224) of (216). The rear core pins (404) engage the cables (218) from above and below to hold them in place during the overmolding operation.

In FIG. 17, the main part of the contact carrying part (238) of the front housing (212) is located in the main cavity part (406) and the conductor connection section (22) of the terminals (214), (216).
8) and (230) and the terminations of the conductors (260) and (262) and the insulated end of the cable (218).

Preferably, an insulating material, such as polypropylene, is injected into the mold cavity and molded around the termination section of the terminal subassembly (210) and onto the subassembly (210) behind the contact receiving portion of the front housing (212). A dielectric cover member (220) is formed. The cover member (220) seals the conductor termination to the terminal, especially the welds (274) and (284). The cover member (220) also securely embeds the terminals to prevent movement of the terminals within the connector assembly. The cover member (220) also extends rearward along the insulated portion of the cable (218) to provide a cable stress relief effect, to tightly clamp the cable as in conventional stress relief methods, and to secure the front housing. The cable is not deformed by bending around the projection perpendicular to the axis.

When individual conductors are used, as can be clearly seen in FIGS. 13 and 21, the cable (2
Preferably, a second stress relief is provided by a transverse bar (286) that is integrally joined to the cover member (220) by webs (288) extending rearwardly away along 18) and extending axially. The web (288) is formed by axial cavities (not shown) at the row ends of the cables (218), preferably between at least several cables near the row ends, and the transverse bar (286) is formed by a rear cavity. Formed by the portion (408). The cable (218) in the end cable adjacent to the web (288) has a groove (41) to help maintain its alignment.
0). The second stress relief bar (286) serves as a feature for gripping during joining and separation of the connector assembly (300) to the pin array and provides for individual cables (21).
8) Relax the stress on.

18 to 21 are top sectional views showing the assembly of the connector assembly (300). In FIG. 18, the signal (214) and ground (216) terminals are inserted into passages (222) and grooves (236) adjacent to the housing (212), respectively. In FIG. 19, the signal terminal (214) is
46) is secured in the passageway (222) by the locking lance (244) corresponding to the signal conductor (260) of the end cable (218A), and the ground conductor (262) is connected to the signal conductor (260). Seen later. The ground terminal (216) is similarly secured in the passage (222) and receives a pair of ground conductors (262) of the second cable (218B). No. 2
In FIG. 0, the signal conductor (260) of the cable (218A) is disposed in the slot (270), and is welded to the conductor connection section (228) of the signal terminal (214) at the welding portion (274), and the cable (218B). The ground conductor (262) is disposed in the slot (280) and welded to the conductor connection section (230) of the ground terminal (216) at the welded portion (284) to form the terminal subassembly (210).

In FIG. 21, a terminal subassembly (210) is overmolded with a cover member (220) rearward from a contact receiving portion (240) of a front housing (212) to form a connector assembly (300). Cover member (220)
Seals the ends and ends of the cables (218A) and (218B). The cover member (220) also has a cable (218
(A), (218B) connected to a crossbar (286) via a web (288). Core pin (402) of mold (400)
In the opening formed rearward from the rear recess (258) of the front housing (212), a part of the flat body section (226) of another signal terminal (214) can be seen, and the cover member (220) can be seen. A portion of the third cable (218) is visible in the opening formed by the core pin (404) near the rear end of the third cable.

Effect of the Invention In the electrical connector of the present invention, the contact-carrying portion is plate-shaped, and the tapered surface is formed at the rear end of the groove of the carrying portion, and the signal conductor and the ground conductor of the electric signal transmission cable are formed by this tapered surface. Each is deflected and terminated to a terminal,
Since the contact holding portion and the end of the electric signal transmission cable are pressed with a mold and overmolded integrally with a dielectric to form the cover member, the following effects are obtained.

That is, the end of the electric signal transmission cable is smoothly introduced and connected to the terminal without being forcibly bent by the tapered surface of the contact holding portion, and the end is in a state where its position is held together with the terminal. As a result, the cable end and the terminal are securely held, and an effect of exhibiting an excellent stress relaxation effect is obtained.

[Brief description of the drawings]

FIG. 1 is a perspective view of a connector of the present invention, in which two terminal assemblies are disassembled from a front housing member, and FIG. 2 is a terminal assembly by termination and overmolding. FIG. 3 is a perspective view of one of the terminal subassemblies prior to the present invention, showing the contact-carrying member, the signal terminal, the ground plate separating the terminal, and the disassembled cable end behind it. FIG. 3 is a longitudinal sectional view of the terminal subassembly taken along line 3-3 in FIG.
The figure is a longitudinal sectional view of the terminal subassembly of FIG. 3 after the terminals have been mounted and the conductors have been connected thereto. FIG. 5 is an enlarged perspective view from below of the terminal welded to the ground plate tab. 6A and 6B are partial plan views before and after welding a signal conductor to a signal terminal in a terminal subassembly. FIG. 7 is an enlarged perspective view of a pair of ground conductors passed through a converging groove in the carrier in the terminal subassembly and terminated to the ground plate with a single weld. FIG. 8 is a longitudinal sectional view of the overmolded terminal assembly, and FIGS. 9 and 10 are longitudinal sectional views of the pair of terminal assemblies of FIG. 8 before and after being coupled and inserted into the front housing. No.
11A and 11B show the latching of the terminal assembly to the housing. FIG. 12 is a perspective view of the second embodiment of the connector assembly of the present invention, in which the terminal is disassembled from the housing and the prepared transmission cable is disassembled from the terminal, before the assembly is terminated and overmolded. Twelfth
FIG. 14 is a perspective view of the connector assembly shown after assembly overmolding, FIG. 14 is a longitudinal sectional view of the housing and the terminal along line 14-14 in FIG. 12, and FIG. 15 is a terminal in the housing and a cable to be terminated thereto. Line 15-15 in FIG. 12 of the conductor
FIG. 16 shows a state where a conductor is terminated to the terminal with housing shown in FIG. FIG. 17 shows the state of the terminated sub-assembly of FIG. 16 after overmolding, and the mold is represented by phantom lines. FIGS. 18 to 21 show a state in which adjacent signal and ground terminals are disassembled from the housing, a state in which the signal and ground terminals are fixed in the housing to receive the signal and ground conductors, a state in which the respective conductors are terminated, and a state in which the respective terminals are overlaid. FIG. 4 is a partial plan view showing a molded state with an upper part of a housing cut away. 10,212 front housing 12 terminal assembly 14,18 latch member 22,214,216 terminal 24,222 terminal receiving passage 30,220 cover member 42 contact holder 44,236 groove 238 contact holder 62… Earth plate 150,218… Electrical signal transmission cable 152,260 …… Signal conductor 154,262 …… Conductor 266,278 …… Tapered surface 200,300 …… Electric connector 400 …… Mold type

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References Japanese Utility Model Sho 58-38988 (JP, U) Japanese Utility Model Sho 59-79986 (JP, U) Japanese Utility Model Sho 57-55758 (JP, Y2)

Claims (2)

(57) [Claims] An electric connector for an electric signal transmission cable including a signal conductor and a ground conductor, comprising: a front housing having a plurality of terminal receiving passages formed in a plurality of rows from a front end to a rear end; A plurality of terminals formed on the signal conductor of the electric signal transmission cable are arranged in the plurality of grooves formed in parallel, and an earth plate arranged on the other surface is arranged on the other surface. A plurality of flat terminal assemblies formed by integrally overmolding the end portions of the contact-carrying member and the electric signal transmission cable with a dielectric material, the terminal assemblies being overlapped with each other, and And a contact section of the terminal extending from a front end of the terminal assembly is disposed in the terminal receiving passage, and the front housing and the terminal assembly are disposed in the terminal receiving passage. Electrical connector, characterized in that fixed to each other by a latch member formed at both ends of the Li. 2. An electric connector for an electric signal transmission cable including a signal conductor and a ground conductor, comprising: a front housing having a plurality of terminal receiving passages formed in a plurality of rows from a front end to a rear end; It is integrally formed in a plate shape at the rear end central part,
A contact carrying portion having a plurality of grooves on both sides and a tapered surface formed at the rear end of the groove; and the electric signal transmission cable disposed in the groove of the contact carrying portion and deflected by the tapered surface. A plurality of terminals terminated to the signal conductor and the ground conductor, and a cover formed by pressing a contact holding portion and an end of the electric signal transmission cable with a mold and integrally overmolding with a dielectric. An electrical connector comprising a member.