CABLE CONNECTORS

Abstract: A cable connector with contact terminals (1) having each, at one end, a contact part (6) for use for example to establish electrical contact with another cable connector, and, at the other end, a connection part (5), for connecting a cable (2) to the connector; a housing (3) having channels (15) into which respective contact terminals (1) are received, and means (7, 16, 18) for holding each contact terminal (1) at a first position in its channel (15) in which position the connection part (5) of the contact terminal (1) is exposed for connection of a cable (2) thereto, and for holding the contact terminal (1) at a second position in its channel (15), for adoption after connection of the cable (2) to the connection part (5), with the contact terminal (1) received further into its channel (15), in which second position the contact terminal (1) is substantially enclosed within its channel, with the connection part (5) unexposed. A method of assembling a cable to such a connector and an assembly machine are also provided.

Description: The present invention relates to cable connectors. Recent progress in electronic equipment has led to an increasing demand for small sized cable connectors to which cables can easily be assembled. A cable assembling method known as insulation displacement connection (generally abbreviated to IDC in the art) is of increasing interest. The IDC assembly method allows cables to be connected to a connector without removal of insulation coating from the cables. In IDC assembling, a connection part is provided on a connector, for connecting a cable thereto. The connection part is provided with blades which pierce through the insulation coating of the cable and bite the core wire of the cable, to make electrical contact with the core wire, when the cable is pressed to a contact terminal of the connector. So, connection of a cable to a contact terminal of the cable connector is accomplished simply by pressing the cable on to the contact terminal. Various connectors for IDC assembly have been developed. These can be divided into two types. A first type, illustrated in Fig. 1, uses a contact terminal 1 which is fixed to a cable 2 by crimping, then the contact terminal is inserted into a housing 3 of the cable connector to be fixed in the housing. An example of such a connector is disclosed in U.S. Patent 4,323,296, April 6, 1982, I Andoh. In this type of connector, the necessary number of the contact terminals 1 must be prepared for each connector. Such preparation is rather troublesome both for vendors and users who handle such cable connectors in quantity. In a second type of connector, as illustrated in Fig. 2, contact terminals 1 are mounted in a housing 3 of the connector. The necessary number of the contact terminals 1 are arranged on the housing 3, so the disadvantage mentioned above with respect to the first type of connector is eliminated, and assembling of a cable 2 to the connector is accomplished merely by pressing the cable 2 into a contact terminal 1. However, in such a type of cable connector, the contact terminals 1 must be covered by a cover 4, because the presence of bare contact terminals is undesirable for safety reasons and for the reiiability of the connector. This makes it difficult to reduce the size of the connector, and additional man-hours and equipment are required for fixing the covers 4 in position on connectors. EP-A-0 034 433 discloses a cable connector having a plurality of contact terminals having each at one end a contact part and, at the other end, a cable connector part for connecting a cable to the connector. The connector has a housing affording channels for receiving contact terminals. In a first position, the connector part of a terminal is exposed for connection of a cable thereto. In a second position, after such connection, tie terminal is substantially wholly enclosed in its channel. EP-A-0 154 387 discloses a cable connector having: a plurality of electrically conductive contact terminals having each, at one end, a contact part for use for example to establish electrical contact with another cable connector, and, at the other end, a connection part for connecting a cable to the connector; aid an electrically insulating housing, having a plurality of channels, separated from each other by partition walls of the housing, into which respective contact terminals are received. Windows in the housing and a projection on a contact terminal serve to hold the terminal at a first position in its channel in which position the connection part of the contact terminal is exposed for connection of a cable thereto, and serve to hold the contact terminal at a second position in its channel, for adoption after connection of the cable to the connection part, with the contact terminal received further into its channel, in which second position the contact terminal is substantially enclosed within its channel, with the connection part unexposed. The present invention provides such a cable connector and being characterized in that each channel has an open trough part and a covered part, and in that at the first position in its channel the connection part of a contact terminal is exposed in the open trough part of the channel for connection of a cable thereto, at the second position in its channel the contact terminal being substantially enclosed within the covered part of its channel. An embodiment of the present invention provides a cable connector having a plurality of contacts for connecting a multi-conductor cable (a multiplicity of cables) and can provide a cable connector which is suitable for connecting cables thereto by insulation displacement connection. An embodiment of the present invention can provide a cable connector of a small size and affording easy assembly of a cable thereto. An embodiment of the present invention can provide a cable connector which has contact terminals mounted on a housing in a manner suitable for IDC assembly, and which is such that after assembly of a cable to the connector, contact terminals are covered, without the need to use a special cover. An embodiment of the present invention enables a variety of "complex" cable connectors to be configured by combining modules, each module corresponding to a "simple" cable connector having a housing as mentioned above. In accordance with one embodiment of the present invention, the cable connector is composed of contact terminals, made of metal, and a housing for fixing each of the terminals in position. First, each contact terminal is temporarily held, by a spring action, in a first position on the housing. In this first position of a contact terminal, a connection part of the contact terminal, for engaging a cable, is exposed by the housing. So, it is easy to press a cable on to the connection part, to establish contact with that part, by IDC assembly. The state of the connector in which connection parts of contact terminals are exposed is called the preloaded state, and the process of setting contact terminals in this disposition (the first position) is called preloading hereinafter. The cable connector is supplied to a user in a preloaded state. The above-mentioned problems, such as preparing the necessary number of the contact terminals for the connector, are avoided. When a cable is pressed onto a connection part, blades formed on the contact terminal pierce through the insulation coating of the cable and bite the core wire of the cable to make electric contact to the core wire. At the same time, holding members provided on the contact terminal embrace the cable to tightly fix the cable to the contact terminal. This is accomplished in a manner similar to ordinary IDC assembling. When the fixing of the cable to the contact terminal is finished, the contact terminal is pushed into the housing and is fixed in a second position. In this second position, the connection part of the contact terminal, which was exposed by the housing, enters a hole or channel in the housing, and is substantially entirely covered by the housing, without the need for a special cover. At the same time, the other end of the contact terminal, providing either a male or female cable connector, is put into a position to complete formation of a cable connector. With such a cable connector configuration, problems described before are eliminated or mitigated and special covers to cover connection parts become unnecessary. The size of a connector can be made smaller than that of a previously proposed connector. Moreover, such configuration makes it possible to form the housing of the cable connector to constitute a module, and by proper combination of housing modules it is possible to form variously shaped cable connectors, such as a flat connector or a rectangular connector, for example. It is also possible to vary the number of cables to be connected to the cable connector. Furthermore, such configuration facilitates wiring of cables to inner parts of the connector, so that a high packing density connector can be realized which has a plurality of contacts arranged with high packing density. Reference is made, by way of example, to the accompanying drawings, in which: Fig. 1 shows in a schematic perspective view a previously proposed cable connector of a type in which contact terminals are inserted into a housing after cables have been fixed to respective contact terminals; Fig. 2 shows in a schematic perspective view another previously proposed cable connector, of a type in which contact terminals are embedded in a housing; Fig. 3 is a schematic exploded perspective view illustrating overall configuration of a cable connector embodying the present invention; Fig. 4(a) is a schematic sectional view, taken substantially along chain line AA′ in Fig. 3, illustrating first and second positions of contact terminals in the housing of the cable connector; Fig. 4(b) is a schematic front view of the housing of the cable connector, seen in the direction of arrow B in Fig. 4(a). Fig. 5 is a schematic front view of a cable connector in which three modules (each corresponding to Fig. 3) are combined to form a complex cable connector; Fig. 6 is a schematic partially cutaway perspective view illustrating how housing modules and cables are mounted when a complex cable connector is provided. Fig. 7 schematically shows a machine for assembling cables to a cable connector, wherein: Fig. 7(a) is a front elevational view, and Fig. 7(b) is a side elevational view of the machine; Fig. 8 is an enlarged schematic perspective view, with parts broken away, for illustrating the mechanism of the machine of Fig. 7, and Figs. 9(a) to (d) illustrate schematically steps in operation of the machine of Fig. 7 for assembling a cable to a cable connector. Throughout the drawings, the same or similar reference numerals designate same or similar parts. Fig. 3 illustrates the overall configuration of a cable connector embodying the present invention. The cable connector has contact terminals 1 for making electric contact to respective cables 2, and a housing 3 mounting the contact terminals 1. A contact terminal 1 is made of metal, copper alloy for example, and formed by stamping work. One end of the contact terminal 1 provides a connection part 5 which makes contact with a cable 2, while the other end of the contact terminal 1 provides a male or female jack 6 for engagement with a female socket or male plug (not shown). The part provided by this latter end will be referred to as a contact part hereinafter. An intermediate part of the contact terminal 1 is provided with a nail spring (leaf spring) 7. In Fig. 3, the contact part is shown as providing a female jack, but it will be apparent that this may alternatively be a male jack. In the explanation given below, reference will be made to a female jack, for simplicity. The connection part 5 is provided with blades 8 which pierce through an insulation coating 9 of cable 2 when the cable is pressed towards or into the connection part 5, and the blades 8 bite a core wire 10 of the cable 2 to make electric contact with the core. The connection part 5 is further provided with holding members 11, which are bent to embrace the cable, to fix the cable tightly to the contact terminal 1. The shape and structure of the connection part, suitable for IDC assembly, and the shape of the male or female jack 6 may be conventional, so further description thereof will be omitted for simplicity. The housing 3 is made of insulator, plastic for example, and is fabricated by injection molding for example. The housing 3 somewhat resembles a harmonica, as may be seen in Fig. 3. A front view of the housing 3 seen from the direction indicated by arrow B in Fig. 3 is as shown in Fig. 4(b). As can be seen in Fig. 3, an upper (in the Figure) wall part 14 of the housing has the appearance of being cut away at one end of the housing, to form open troughs or decks 12 in front of openings leading to covered channels or passageways (holes) 15 into which contact terminals 1 are inserted. The open troughs or slots 12 are separated from each other by partition walls 13. The length the cut away part of the housing, or of a trough 12, is substantially equal to the length of the connection part 5 of a contact terminal 1. The width of a trough 12 and of a covered channel 15 are equal to that of a contact terminal 1, and the height of a covered channel 15 is a little less than that of a holding member 11. Therefore, when a contact terminal 1 is inserted into a channel 15, contact part 6 first, it does not penetrate the covered channel 15 beyond the position indicated by C in the Figure, and the connection part 5 is exposed in the open trough 12. This position is called the first position. On the upper wall 14 of the housing there are provided first windows 16, as shown in the Figure. The nail spring 7 of a contact terminal is higher than the height of a channel 15, but the spring can be deformed or compressed by the upper wall 14 when the terminal is inserted and the contact terminal 1 can be pushed into the covered channel 15. When the contact terminal 1 reaches the first position, the nail spring 7 springs into a first window 16, to engage the window in the manner of a barb. The first window 16 is positioned on the upper wall 14 so that it can catch the nail spring 7 in such a manner. When the nail spring 7 springs into the first window 16, in the manner of a barb, the contact terminal 1 cannot be pulled out of the housing unless the nail spring 7 is pushed down in the first window. The relationship between a contact terminal 1 and housing 3 can perhaps be seen more clearly in Fig. 4(a). This Figure shows a cross sectional view of the connector of Fig. 3 substantially taken along chained line AA′ in Fig. 3. In Fig. 4(a) a contact terminal 1′ is shown inserted into an upper channel 15′ to the first position, whilst in a lower channel 15" another contact terminal 1" is shown inserted to a second position, which position will be described later. It will be clear that the contact terminal 1′ is held in the first position by nail spring 7′ engaged in an upper first window 16′ and by holding member 11′. The insertion of the contact terminal 1′ into channel 15′ is stopped or limited by the holding member 11′: the terminal 1′ cannot (as yet) go further into the upper channel 15′, and it cannot go back (be withdrawn) since withdrawal is prevented by the nail spring 7′. It will be understood that the terms "upper" and "lower" as used above are used only for convenience in referring to Fig. 4(a). In practice, "upper" and "lower" parts of housing 3 are formed similarly to each other. In the manner described above, each channel or passageway 15 of the housing 3 is provided with a contact terminal. The contact terminals 1 are temporarily held in the first position. The insertion of the contact terminals 1 into the channels 15 of the housing 1 up to the first position is called preloading, and with the contact terminals in the first position the connector is said to be in a preloaded state. The connector can be delivered to a user in such a preloaded state. So, neither the vendor nor the user need worry that the necessary number of contact terminals for a cable connector is present. This is similar to the type of connector as described with respect to Fig. 2. The assembling of a cable to the connector is effected as follows. A cable 2 is aligned to deck or trough 12 on or in which a contact terminal 1 is held in the first position, as shown in Fig. 3. Then the cable is pressed downwards (into the trough or towards the deck). So, blades 8 piece through cable coating 9 and bite wire core 10 to make contact with the core At the same time the holding member 11 is bent to embrace the cable. This process is similar to that used for assembling a cable to an ordinary IDC type connector. Since the holding members 11 are bent, it becomes possible to push the contact terminal 1 further into covered channel 15. As shown in Fig. 4(a), the contact terminal 1" is pushed into the lower channel 15" until the tip 17 of the contact part 6" (female jack in this embodiment) reaches to the bottom or end of the lower channel 15". At the same time the nail spring 7" reaches a lower second window 18" and engages that window in the manner of a barb. The second windows 18 in Fig. 3 are positioned on the upper wall 14 of the housing 3 so that they can catch nail springs 7 of contact terminals in this manner. So, contact terminal 1" cannot be pulled out unless the nail spring 7" is pushed down into (out of engagement in) the second window 18". The sizes of the first windows 16 and the second windows 18 are not great; accordingly, as can be seen in Fig. 4(a), the nail spring 7 does not protrude out of the windows. This is important to insulate the contact terminals 1 from their circumference (surroundings). However, the engagement is sufficient to prevent a contact terminal 1 being pulled out of a hole 15 in which it is installed. The assembling of the cable is completed in such manner. In like manner, remaining contact terminals and cables are assembled, and the cable connector is completed. As can be seen in Fig. 4(a), the height of the covered channels 15 is less in deeper portions of the channels (towards the left in the Figure), as compared to portions nearer the channel entrances (towards the right in the Figure) by a taper 14′ or 14" in a centre wall part of the housing provided between such portions. This shape of channel 15 is fitted or conformed to the external configuration of contact part 6 of a contact terminal. So, a contact part 6 of a fully inserted contact terminal is fixed precisely in a position to meet with an opening 19 provided in the housing 3 for provided a socket of a female (or male) jack. As can be seen in the front view of Fig. 4(b), in this embodiment, the connector has eight connecting sockets arranged in two rows. In the above-described embodiment, the connector has eight contacts arranged in two rows. However, it will be clear that the arrangement of contacts can be freely varied, so various modifications of arrangement are possible. From a practical view point, the arrangement of contacts as shown in Fig. 4 is very convenient. If one arrangement, for example as shown in Fig. 4(b), is made a standard, its housing may be used as a module. Combining several module housings, it is possible to form a further variety of complex connectors. An example is shown in Fig. 5, which shows a front view of a connector seen from its socket side. In this embodiment, three modules (each a housing 3) are combined into one connector by a shell 20. The combined connector has twenty-four contacts arranged in four rows. If further modules are added to the sides of this arrangement a larger connector can be provided. On the other hand, if only two modules are arranged together, a square connector having sixteen contacts is provided. Further, if modules are arranged horizontally, side by side (edge on), in contact with each other, a flat connector having two rows of contacts can be provided. Other variations are possible simply by varying the shell 20 used for combining modules. Fig. 6 shows an example of a combined connector. The Figure is a partially cutaway perspective view of a combined connector. In this embodiment, five modules 3 are packed in a shell 20, so the connector has forty contacts, corresponding to forty-wire cable 40. The shell 20 is divided into two parts, an upper shell part 20′ and a lower shell part 20". These parts are combined by screws 22, after wiring the cables to respective housings and placing them in proper position. A hook 21 is provided on the shell 20 for fastening the connector to an opposing (complementary) socket or chassis (not shown). Usually, it is difficult to wire a cable to inner parts of a connector having a large number of contacts. So, a cable connector has had to be made larger in order to afford accessibility for wiring terminals positioned inwardly of the connector, or has had to be designed as a flat connector. Using the combined connector described above, it is easy to wire cables to parts which will be inward of the connector, since each module can be wired separately and then the modules combined. This makes it possible to realize a small size and high density connector that has many contacts arranged with high density. Next, a machine for assembling cables cable to cable connectors will be described briefly. Fig. 7 illustrates schematically an example of a wire assembler designed for a cable connector. Fig. 7(a) is a front view of the assembler and Fig. 7(b) a side view, schematically illustrating positions of main parts. 23 and 24 are cable clampers. The cable clamper 23 is movable up and down to clamp a cable, and both cable clampers 23 and 24 are movable horizontally to push a contact terminal 1 into the housing of a connector. 25 is a cable guide provided with a taper 25′ for guiding a cable to a position for assembly with a connector. 26 is a punch for pressing a cable towards a contact terminal of a connector. 27 is a base on which a housing is loaded. 28 is a hook which shifts the housing by a pitch corresponding to terminal spacing, after wiring of one terminal is complete. A mechanism for moving these parts and a controller for controlling the timing and sequence of their motions are installed in a case 29. More detailed description of the motion of parts mentioned above will be given with reference to Fig. 8 and Fig. 9. Fig. 8 is an enlarged perspective view, with some parts broken away for better illustration, of main parts of the assembling machine of Fig. 7. A housing 3 is placed on base 27, aligning a groove 30 (formed on upper and lower surfaces of the housing 3) with a rail 31 formed on the base 27. The hook 28 engages one of the second windows 18. So, the position of the housing 3 is fixed on the base 27. As mentioned above, the housing is preloaded with a contact terminal 1 in each channel, at the first position. Though the cable guide 25 is broken away in Fig. 8, its taper parts 25′ (Fig. 7) lead a cable 2 to a position above the connection part 5 of a contact terminal 1. A side view of this situation is given in Fig. 9(a). The cable guide 25 is partially broken away in the Figure, but it also fixes the axial position of the cable 2 as illustrated in the Figure. At the same time, the cable guide 25 holds the housing 3, pressing it toward the base 27. Next, as shown in Fig. 9(b), the cable clamper 23 goes down. As can be seen in Fig. 8, the tip 33 of the cable clamper is concave, so it holds the cable 2 at centre of the cable clamper 23. As seen in Fig. 8, there is a side projection 32 on the tip of the cable clamper 24, and the relative position of the tip 33 and the side projection 32 are split by (differ by) the diameter of the cable 2 as shown in Fig. 9(b), the cable is bitten between the side projection 32 and the flat part 34 of the tip of the cable clamper 23. At the same time the cable 2 is bent as shown in Fig. 9(b). Successively, the punch 26 goes down as shown in Fig. 9(c). The tip of the punch 26 is provided with grooves 35 which receive blades 8 when the punch 26 pushes the cable 2 downward into the connection part 5 of the contact terminal 1. Since the tip of the punch 26 is concave as shown in Fig. 8, it bends holding members 11 around the cable 2 to embrace the cable tightly. Then, the punch 26 goes up as shown in Fig. 9(d). Following that, the cable clampers 23 and 24 move horizontally towards the housing 3. In practice, the cable clampers are slightly slanted against the housing 3, as shown in Fig. 9(d). So, the contact terminal 1 is pushed into a channel 15 of the housing and brought to the second position as described above. As can be seen in the Figure, the contact terminal 1 is substantially entirely covered by the housing. In such a manner, the assembly of a wire to the cable connector is completed. The machine returns to the state illustrated in Fig. 9(a). The cable guide 25 frees the housing, and the hook 28 shifts the housing 3 by one terminal spacing pitch. Then, the wiring of a next terminal begins. The details of the wire assembler described above are only exemplary, it will be possible for one skilled in the art to vary the design of such a machine. But by adopting a configuration of a cable connector embodying the present invention and applying an assembly method as disclosed above, it becomes very simple to assemble cables to a connector. There is need neither for preparing the necessary number of contact terminals for each cable connector, nor for worrying about loosing contact terminals while the connector is being transported. Since a cover for the contact terminals is unnecessary, the size of the cable connector can be reduced, and machine, equipment and man-hours required for fitting such covers are eliminated. So, an assembling machine and man-hours are saved. This is of great significance to both vendor and user of the connectors. Embodiments of aspects of the present invention provide an IDC type multi-conductor cable connector. The cable connector is composed of plurality of contact terminals mounted in a housing which has plurality of covered channels, each for holding one of the contact terminals. Each contact terminal has a contact part provided at one end and an IDC type connection part provided at its opposite end. The connector has a means for temporarily holding contact terminals with their connection parts exposed (outside the channel in which the terminal is held). The connector can be transported or delivered from the vendor in this state. A cable is assembled to the connector by IDC assembling to an exposed connection part. When the connection of the cable is completed, the contact terminal is inserted deeply into its channel so that it is covered substantially entirely. Such a configuration eliminates the need for a separate cover, which is necessary for ordinary IDC type connectors, and it provides for a reduction in connector size and in assembly man-hours. A housing as mentioned above can be used as a module. By combining such module housings, it is possible to construct various type of connectors merely by changing a casing for combining the modules. Wish such a combined connector it is easy to wire to inner parts of the cable connector. It is thus possible to realize high packing density multi-contact connectors. An embodiment of the present invention provides a cable connector having a plurality of contacts to be engaged with respective counterpart of opposite connector, said cable connector comprising: plurality of contact terminals made from metal each of which being provided with, a contact part provided at one end of said contact terminal for contacting to corresponding terminals of opposite connector, and a connection part provided at another end of said contact terminal for connecting cable thereto; a housing made from insulator for holding said contact terminals, said housing being provided with holes corresponding to each contact terminals for holding them separated from each other; and a pre-loading means for holding said contact terminals at a first and second position in said hole in the housing, in said first position said connection part of said contact terminal is exposed from the hole of said housing, while in said second position said connection part of said contact terminal is entirely covered by wall of said hole in the housing.

Claims: A cable connector, comprising:- a plurality of electrically conductive contact terminals (1) having each, at one end, a contact part (6) for use for example to establish electrical contact with another cable connector, and, at the other end, a connection part (5), for connecting a cable (2) to the connector; an electrically insulating housing (3), having a plurality of channels (15), separated from each other by partition walls of the housing, into which respective contact terminals (1) are received, and means (7, 16, 18) for holding each contact terminal (1) at a first position in its channel (15) in which position the connection part (5) of the contact terminal (1) is exposed for connection of a cable (2) thereto, and for holding the contact terminal (1) at a second position in its channel (15), for adoption after connection of the cable (2) to the connection part (5), with the contact terminal (1) received further into its channel (15), in which second position the contact terminal (1) is substantially enclosed within its channel, with the connection part (5) unexposed, characterised in that each channel (15) has an open trough part (12), and a covered part, and in that at the first position in its channel (15) the connection part of a contact terminal (1) is exposed in the open trough part (12) of the channel for connection of a cable thereto, at the second position in its channel the contact terminal being substantially enclosed within the covered part of its channel (15). A cable connector as claimed in claim 1, wherein the said means comprise, in respect of each contact terminal (1) and its channel (15), a nail or leaf spring (7) provided at a part of the contact terminal (1) intermediate its contact (6) and connection (5) parts, a first window (16) formed in a wall of the channel (15), the spring (7) and the first window (16) being such that the spring engages the first window when the contact terminal is at the first position, and a second window (18) formed in a wall of the channel (15), the spring (7) and the second window (18) being such that the spring engages the second window when the contact terminal is at the second position. A cable connector as claimed in claim 1 or 2, wherein the connection part (5) of each contact terminal (1) comprises:- blade portions (8) formed integrally with said contact terminal (1), arranged to pierce the coating (9) of a cable (2) to bite its core wire (10) to make electrical contact to the core wire, when the cable is pressed onto the connection part for establishing connection to the connector; and holding members (11), formed integrally with the contact terminal (1), arranged for bending over to embrace the cable (2), to hold the cable when the cable is connected to the connection part of the contact terminal; holding members (11) being so dimensioned as to prevent insertion of the contact terminal (1) into its channel (15) beyond the first position, by engagement of holding members with the mouth of the channel into which the contact terminal is received, before the holding members are bent over. A cable connector as claimed in claim 1, 2 or 3, wherein the cross section of each channel is less at a portion deeper into the channel, as compared with its cross section at a portion at the mouth of the channel into which its contact terminal is received, an intermediate portion of the channel being tapered, so as to closely fit and contact external parts of its contact terminal when at the second position. A cable connector as claimed in any preceding claim, wherein the housing (3) affords two rows of channels (15), one row above the other. A cable connector, comprising a plurality of modules and a shell (20) for combining the modules, each module being a cable connector as claimed in any preceding claim. A cable connector as claimed in any preceding claim, with all the contact terminals (1) at the first position in their channels (5), with no cables connected thereto.

Inventors: ANDOH, IKUHIRO C/O FUJITSU LTD. PATENT DEP., KOBAYASHI, MITSURU C/O FUJITSU LTD. PATENT DEP., KOYAMA, HIROMICHI C/O FUJITSU LTD. PATENT DEP., MIYAZAWA, HIDEO C/O FUJITSU LTD. PATENT DEP.
Applicants: FUJITSU LIMITED
Application year: 1987
Main classification: H01R4
IPC codes: H01R13, H01R43, H01R4