JP4922105B2 - Connector and cable connection method for connecting a cable to the connector - Google Patents

Description

  The present invention relates to a connector for welding a cable such as a high-speed transmission coaxial cable and a method for connecting a cable for welding a conductor and / or a drain line of a cable to a connection surface of a contact of the connector. The cable assembly obtained by this cable connection method is mainly used for data transmission between supercomputers and large-capacity high-speed servers.

  Conventionally, a transmission cable is used for a communication transmission cable used between servers such as computers, and even when a communication signal is transmitted instantaneously with a large capacity, reception and transmission are performed instantaneously or simultaneously smoothly. Used for etc.

  As the above transmission cable, as shown in Patent Document 1, an insulating wire core is configured by covering an outer periphery of, for example, a round conductor as a conductor with a foamed resin. A pair of core wires and a drain wire are taped in parallel, and a plurality of pair wires with drain wires are twisted together to form a braid (shield) around the pair wires. Is sheathed.

  Moreover, as said connector, generally, in order to weld said one insulation core wire, the belt-shaped 1st signal contact formed extended long in the front-back direction, and said other insulation core wire are welded For this purpose, a belt-shaped second signal contact formed to extend in the front-rear direction and a ground contact formed to extend in the front-rear direction to weld the drain wire are provided.

  More specifically, the first signal contact is formed to extend in the front-rear direction on the upper surface of a flat plate portion made of an insulating material protruding in the front-rear direction on the connector body, and the second signal contact is formed on the flat plate portion. The first signal contact and the second signal contact are opposed to each other with a flat plate portion interposed therebetween to form a pair. The ground contact extends long in the front-rear direction on the upper and lower surfaces of the flat plate portion and is connected to the rear end surface. Further, the plurality of pairs of first and second signal contacts and a plurality of ground contacts are alternately arranged on the flat plate portion with appropriate intervals in the left-right direction.

A plurality of transmission cables are connected to the first and second signal contacts of the above-mentioned connector by series resistance welding, for example. A drain wire is welded and connected to one end (upper end) of each ground contact by series resistance welding.
Republished Patent W2003 / 85787

  By the way, since the joining method shown in the above-mentioned conventional patent document 1 is a welding joining method by resistance welding series welding, there is a current (hereinafter referred to as an invalid shunt) that flows in the conductor itself with respect to the applied current. However, this reactive current is lost, and there is a problem that it affects the discoloration and deformation of the conductor.

  Generally, in resistance welding, direct welding (so-called spot welding in which a welded portion is sandwiched between electrodes) is higher in strength than series welding. That is, in series welding, if a sufficient current is made to flow to the joint in order to improve the above-described joint strength, the above-described ineffective shunting is also generated, and the conductor is likely to be splashed, resulting in a decrease in the joint strength. As a result, there is a problem that the welding strength is not high because there is an excessive ineffective diversion and heat generation at the welded joint cannot be increased.

  The present invention aims to improve the mechanical strength of the weld joint by applying direct welding to a connector having a shape in which the first and second signal contacts and the cable conductor cannot be sandwiched between the electrodes from above and below. Objective.

In order to solve the above-mentioned problems, the connector of the present invention protrudes backward from the connector body so as to connect the end of the first conductor of the cable having a pair of first and second conductors and one drain wire. A first signal contact that is provided, and a rearward direction to the connector body to connect the end portion of the second conductor of the cable at a position facing the first signal contact with a gap in the vertical direction. A plurality of projecting second signal contacts; and a ground contact projecting rearward from the connector body at a position parallel to the first and second signal contacts in the left-right direction, and connecting a plurality of the cables Preferably, the first and second signal contacts and the plurality of ground contacts that make a plurality of pairs are alternately arranged in parallel in the left-right direction with an appropriate interval between them,
The plurality of ground contacts are formed with electrode insertion holes through which a flat plate-like lower electrode for resistance welding can be inserted in the left-right direction at intervals between the first and second signal contacts forming the pairs. It is characterized by being.

  In the connector according to the present invention, in the connector, the electrode insertion hole may be in contact with the upper and lower surfaces of the lower electrode when inserted through the gap between the paired first and second signal contacts. preferable.

According to the cable connecting method of the present invention, the connector has a first signal contact projecting rearward from the connector main body, and a position facing the first signal contact in a vertical direction so as to form a pair with the first signal contact. A second signal contact projecting rearward from the connector body, and a ground contact projecting rearward from the connector body at a position parallel to the left and right directions with respect to the first and second signal contacts, When welding the end of the first conductor or the second conductor of the cable to the first signal contact or the second signal contact,
In the ground contact, a flat bottom electrode for resistance welding is formed with an electrode insertion hole through which the first and second signal contacts can be inserted in the left-right direction,
The lower electrode is inserted from the left and right direction into the gap between the electrode insertion hole and the first and second signal contacts,
After the end of the first conductor or the second conductor of the cable is overlapped with the first signal contact or the second signal contact in the front-rear direction, the first conductor or the second conductor of the cable is placed on the first signal contact or the second signal contact. The two conductors are sandwiched between the upper electrode and the lower electrode and are welded and joined by pressurization and energization.

The cable connection method of the present invention is the cable connection method according to the above-mentioned cable connection method, in which the connector is arranged in a vertical direction so as to form a pair with the first signal contact projecting backward from the connector body. A second signal contact projecting rearward from the connector body at a position facing the gap, and projecting rearward from the connector body at a position parallel to the first and second signal contacts in the left-right direction. When the end of the cable drain wire is welded to the ground contact,
An electrode insertion hole through which a flat lower electrode for resistance welding can be inserted in the left and right direction at the interval between the first and second signal contacts and can contact the upper and lower surfaces of the lower electrode. Forming part,
Insert the lower electrode through the electrode insertion hole from the left-right direction,
After overlapping the end of the drain line of the cable in the front-rear direction on the upper surface of the ground contact, the ground contact and the drain line are sandwiched between the upper electrode and the lower electrode, and are pressurized and energized for welding joining. It is characterized by doing.

Further, according to the cable connection method of the present invention, the connector faces the first signal contact projecting rearward from the connector main body, and is opposed to the first signal contact with an interval in the vertical direction. A second signal contact projecting rearward from the connector body, and a ground contact projecting rearward from the connector body at a position parallel to the first and second signal contacts in the left-right direction. And when welding the end of the first conductor or the second conductor of the cable to the first signal contact or the second signal contact and welding the end of the drain line of the cable to the ground contact,
An electrode insertion hole through which a flat lower electrode for resistance welding can be inserted in the left and right direction at the interval between the first and second signal contacts and can contact the upper and lower surfaces of the lower electrode. Forming part,
The lower electrode is inserted from the left and right direction into the gap between the electrode insertion hole and the first and second signal contacts,
After the end of the first conductor or the second conductor of the cable is overlapped with the first signal contact or the second signal contact in the front-rear direction, the first conductor or the second conductor of the cable is placed on the first signal contact or the second signal contact. Two conductors are sandwiched between the upper electrode and the lower electrode, pressurized and energized, and welded,
After overlapping the end of the drain line of the cable in the front-rear direction on the upper surface of the ground contact, the ground contact and the drain line are sandwiched between the upper electrode and the lower electrode, and are pressurized and energized for welding joining. It is characterized by doing.

In the cable connection method according to the present invention, in the cable connection method, after the end portion of the first conductor is welded to the first signal contact, the end portion of the second conductor is connected to the second signal contact. When welding
The connector main body in a state where the flat plate-like lower electrode for resistance welding is inserted in the interval between the first and second signal contacts is inverted so that the second signal contact is in the upper position, After the end portions of the second conductor are overlapped in the front-rear direction, the second signal contact and the second conductor are sandwiched between the upper electrode and the lower electrode, and pressurized and energized for welding joining. preferable.

  According to the cable connection method of the present invention, in the cable connection method, the end of the first conductor is overlapped with the first signal contact in the front-rear direction, and the second conductor is connected to the second signal contact. After the end portions are overlapped in the front-rear direction, the first signal contact and the first conductor are disposed between the upper electrode and the lower electrode, and the second signal contact and the second conductor are coupled to the lower electrode and the third electrode. It is preferable that the electrodes are simultaneously sandwiched and welded by pressurization and energization.

  The cable connection method according to the present invention is the cable connection method, wherein the connector includes a plurality of the first and second signal contacts and the ground contact that are alternately arranged in parallel in the left-right direction. It is preferable that

  As can be understood from the means for solving the problems as described above, according to the connector of the present invention, the position where the first signal contact and the second signal contact face each other in the vertical direction so as to form a pair. Since the electrode insertion hole is formed in the ground contact projecting backward on the connector body and projecting backward on the connector body, a flat plate-like lower electrode for resistance welding is used for the electrode insertion. The end of the first conductor or the second conductor of the cable is directly welded to the first signal contact or the second signal contact by being inserted through the hole from the left and right directions and at the interval between the first and second signal contacts. Can be welded together. Also, the end of the cable drain wire can be welded to the ground contact by direct welding.

  According to the cable connection method of the present invention, since the distance between the first and second signal contacts facing each other in the vertical direction is narrow, even if direct welding cannot be performed by normal resistance welding, The flat bottom electrode for resistance welding can be inserted from the left and right in the gap between the electrode insertion hole formed in the ground contact of the connector and the first and second signal contacts, so that the first signal contact or the second signal contact In addition, the end portion of the first conductor or the second conductor of the cable can be welded by direct welding. As a result, since the welding joint is direct welding, an ineffective shunt does not occur as in series welding, so that the applied current can be used as it is for the welding energy. The strength is improved.

  Further, according to the cable connection method of the present invention, the flat bottom electrode for resistance welding can be inserted from the left and right through the electrode insertion hole formed in the ground contact, so that the drain of the cable is connected to the ground contact of the connector. The end of the wire can be welded by direct welding. As a result, since the welding joint is direct welding, an invalid shunt does not occur as in series welding, so that the applied current can be used as it is for the welding energy. The strength is improved.

  Further, according to the cable connection method of the present invention, the flat plate-like lower electrode for resistance welding can be inserted from the left and right directions into the gap between the electrode insertion hole formed in the ground contact and the first and second signal contacts. Thus, the end portions of the first conductor, the second conductor and the drain wire of the cable can be welded to the first signal contact, the second signal contact and the ground contact, respectively, by direct welding. As a result, since the welding joint is direct welding, an invalid shunt does not occur as in series welding, so that the applied current can be used as it is for the welding energy. The strength is improved.

  Embodiments of the present invention will be described below with reference to the drawings.

  Referring to FIG. 1, a transmission cable 1 used in this embodiment is used for a communication transmission cable used between servers such as computers, and transmits a communication signal and the like instantaneously with a large capacity. However, it is used when reception and transmission are performed smoothly instantaneously or simultaneously.

  As said transmission cable 1 (henceforth only a "cable"), the insulated wire core 7 is comprised by coat | covering the insulator 5 which foamed resin around the outer periphery of the conductor 3 as the conductor, for example, A pair of insulated wires 7 and a drain wire 9 are parallelly wound with tape 11 in parallel, and a plurality of pair wires with the drain wire are twisted together to form a braid (shield). After that, a sheath is applied around the periphery. In this embodiment, the round conductor 3 is made of, for example, a 0.4 mmφ copper wire, and the surface of the copper wire is plated with, for example, 2 μm of silver.

  2 and 3 together, as the connector 13 according to the embodiment of the present invention, the connector main body 15 is connected to the first conductor 17 of the one insulated wire core 7 of the cable 1 (to the conductor 3). A first signal contact 19 protrudes in the rear direction (X-axis direction) so as to connect the corresponding end portions, and is formed in a vertical direction (Z-axis direction so as to form a pair with the first signal contact 19. The second signal contact 23 is connected to the connector main body so as to connect the end of the second conductor 21 (corresponding to the conductor 3) of the other insulated wire core 7 of the cable 1 at a position opposite to the connector 1). 15 projecting in the rear direction (X-axis direction).

  Further, the ground contact 25 extends rearward (X-axis direction) to the connector body 15 at a position parallel to the left and right direction (Y-axis direction) with respect to the paired first and second signal contacts 19 and 23. Projected toward.

  In order to connect a plurality of cables 1, a plurality of pairs of the first and second signal contacts 19 and 23 and a plurality of the ground contacts 25 are alternately arranged in parallel in the left-right direction at appropriate intervals. .

  In addition, the plurality of ground contacts 25 are provided with a flat plate-like lower electrode 27 having a rectangular cross section for resistance welding in the left-right direction at intervals between the first and second signal contacts 19 and 23 that form the respective pairs. An electrode insertion hole 29 is formed which can be inserted and can contact the upper and lower surfaces of the lower electrode 27.

  A flat plate portion 31 made of an insulating material protrudes from the front side (X-axis direction) of the connector main body 15, and the first and second signal contacts 19 and 23 are respectively connected to the upper surface of the flat plate portion 31. A connecting portion 33 is formed on the lower surface so as to extend in the forward direction (X-axis direction) and to be connected to another connector.

  From the above, the connector 13 protrudes rearward from the connector main body 15 at a position facing the first signal contact 19 and the second signal contact 23 in a pair so as to form a pair in the vertical direction with a gap therebetween. Since the electrode insertion hole 29 is formed in the ground contact 25 projecting rearward from the connector main body 15, a flat plate-like lower electrode 27 for resistance welding is placed on the electrode insertion hole 29. The first conductor 17 of the cable 1 or the end of the second conductor 21 of the cable 1 is inserted into the first signal contact 19 or the second signal contact 23 by being inserted from the direction and in the interval between the first and second signal contacts 19 and 23. The parts can be welded by direct welding. Further, the end of the drain wire 9 of the cable 1 can be welded to the ground contact 25 by direct welding.

  From the viewpoint of welding the first conductor 17 or the second conductor 21 to the first signal contact 19 or the second signal contact 23, the position and size of the electrode insertion hole 29 is basically the lower electrode. 27 may be formed so as to be in contact with the upper and lower surfaces of the lower electrode 27 as long as it can be inserted into the gap between the first and second signal contacts 19 and 23. 25 and the drain wire 9 are also preferably formed so as to be in contact with the upper and lower surfaces of the lower electrode 27 for welding.

  Next, the cable connection method according to the embodiment of the present invention will be described in the case where the cable 1 is connected to the connector 13 according to the embodiment described above with reference to the drawings.

  4 and FIG. 7 together, as a method of connecting this cable, the flat bottom electrode 27 having a rectangular cross section for resistance welding is connected to the electrode insertion hole 29 of the ground contact 25 of the connector 13 and the above-mentioned The space between the first and second signal contacts 19 and 23 is inserted from the left and right directions. At this time, the first signal contact 19 is in contact with the upper surface of the lower electrode 27, the second signal contact 23 is in contact with the lower surface of the lower electrode 27, and the upper and lower surfaces of the lower electrode 27 are in contact with the electrode insertion hole 29.

  Next, as shown in FIGS. 4 and 5, the second signal contact 23 side of the connector 13 is placed on a base 35 of a resistance welding apparatus (not shown). In this embodiment, for example, the base 35 has a shape in which a plurality of second signal contacts 23 and a plurality of ground contacts 25 arranged alternately can be placed in contact with each other during welding. It is desirable in terms of increasing the strength of receiving pressure.

  As shown in FIG. 5, each of the first signal contacts 19 of the connector 13 placed on the base 35 as described above has a plurality of cables 1 corresponding to the first signal contacts 19. After the end portions of the first conductors 17 are overlapped in the front-rear direction, the upper electrode 37 that can be driven up and down is lowered, and the first conductor 17 and the first signal contact 19 are connected to the upper electrode 37 and the lower electrode 27. And is energized while applying a constant load (pressurization) to generate heat due to the contact resistance at the interface between the first conductor 17 and the first signal contact 19, and the joint 39 (nugget). Are formed and welded together. In this way, the welding connection between each first signal contact 19 and the end of the first conductor 17 of each cable 1 corresponding to the first signal contact 19 is sequentially performed in the same manner.

  Further, on the upper surface of each ground contact 25 of the connector 13 placed on the base 35 as described above, as shown in FIG. 6, each of the plurality of cables 1 corresponding to each ground contact 25 is provided. After the end portions of the drain lines 9 are overlapped in the front-rear direction, the upper electrode 37 is lowered and the drain line 9 and the ground contact 25 are sandwiched between the upper electrode 37 and the lower electrode 27, and a constant load is applied. As a result, the joint 39 (nugget) is formed by welding due to heat generated by the contact resistance at the interface between the drain wire 9 and the ground contact 25. In this way, welding connection between each ground contact 25 and the end of the drain line 9 of each cable 1 corresponding to the ground contact 25 is sequentially performed in the same manner.

  Next, as shown in FIG. 7, the connector 13 is inverted so that the second signal contact 23 is in the upper position, and the first signal contact 19 side is placed on the base 35. After the end portions of the respective second conductors 21 of the plurality of cables 1 corresponding to the respective second signal contacts 23 are overlapped in the front-rear direction, the respective second signal contacts 23 of the connector 13 are connected to each other. The upper electrode 37 is lowered, the second conductor 21 and the second signal contact 23 are sandwiched between the upper electrode 37 and the lower electrode 27, and energized while applying a constant load (pressurization). Heat is generated by the contact resistance at the interface between the two conductors 21 and the second signal contact 23 to form a joint 39 (nugget), which is welded. In this manner, the welding connection between each second signal contact 23 and the end of the second conductor 21 of each cable 1 corresponding to the second signal contact 23 is sequentially performed in the same manner.

  As described above, since the distance between the first and second signal contacts 19 and 23 facing each other in the vertical direction (Z-axis direction) is narrow, direct welding cannot be performed by normal resistance welding. Also, a flat plate-like lower electrode 27 for resistance welding is arranged in the left-right direction between the electrode insertion hole 29 formed in the plurality of ground contacts 25 of the connector 13 and the plurality of pairs of first and second signal contacts 19, 23. The first and second signal contacts 19 and 23 of the plurality of pairs of the connector 13 and the ends of the first and second conductors 17 and 21 of the corresponding plurality of cables 1 are welded and joined by direct welding. it can. Moreover, the end portions of the drain wires 9 of the plurality of ground contacts 25 and the corresponding plurality of cables 1 can be welded together by direct welding. As a result, since each welding joint described above is direct welding, an ineffective shunt does not occur as in series welding, so that the applied current can be used as it is for the welding energy. The mechanical strength of (nugget) can be improved.

  In the cable connection method of the above-described embodiment, the welding of the first signal contact 19 of the connector 13 and the end of the first conductor 17 of the cable 1, the second signal contact 23 of the connector 13 and the cable 1 are connected. The welding of the end of the second conductor 21 is performed separately and independently, but can be performed simultaneously.

  For example, as shown in FIG. 8, the end of the first conductor 17 is overlapped with the first signal contact 19 in the front-rear direction, and the end of the second conductor 21 is overlapped with the second signal contact 23 in the front-rear direction. Overlapping with. Thereafter, the first signal contact 19 and the first conductor 17 are disposed between the upper electrode 37 and the lower electrode 27, and the second signal contact 23 and the second conductor 21 are disposed on the lower electrode 27 and the third electrode 41. Are welded together by energizing them while applying a constant load (pressurization). In this case, the upper electrode 37 and the third electrode 41 are electrically connected to the power supply source, so that the lower electrode 27 serves as an intermediate electrode, and the above two joints are simultaneously formed by direct welding. It will be welded. The third electrode 41 is provided at a position facing the upper electrode 37.

  Accordingly, each drain line 9 of the plurality of cables 1 corresponding to each ground contact 25 of the connector 13 is connected to each drain of the plurality of cables 1 corresponding to each ground contact 25 as shown in FIG. After the end portions of the wires 9 are overlapped in the front-rear direction, the drain wire 9 and the ground contact 25 are sandwiched between the upper electrode 37 and the third electrode 41, and a certain load is applied (pressurized). By being energized, it is efficiently welded and joined by direct welding.

  Next, in order to obtain the effect of the transmission cable connecting method in this embodiment, a comparative test between direct welding in this embodiment and conventional series welding will be described.

  Referring to FIGS. 10A to 10C, as a comparative test method, a peel test of a joint portion was performed on two types of test pieces. The two types of test pieces were obtained by welding from the connector 13 after being welded together with the actual connector 13, and the first type of test piece is as shown in FIG. In the same manner as in the above-described embodiment, the first and second conductors 17 and 21 and the conductor piece corresponding to the drain line 9 with respect to the terminal piece 43 corresponding to the first and second signal contacts 19 and 23 and the ground contact 25. 45 is a direct weld. On the other hand, although not shown in the drawing, the second type of test piece is obtained by series-welding the conductor piece 45 to the terminal piece 43 in the same manner as in the conventional case.

  The terminal piece 43 is made of gold flash-plated phosphor bronze and has a rectangular cross section with a thickness of 0.2 mm and a width of 0.4 mm. The conductor piece 45 is an AWG26 silver-plated annealed copper wire and has a diameter of 0.40 mm.

  Moreover, the cross-sectional rectangular dimension of the lower electrode 27 is 1.2 mm in thickness. The width is slightly smaller than the size of the electrode insertion hole 29 of the ground contact 25, and any width can be used as long as it can be inserted into the space between the first and second signal contacts 19 and 23.

  As a welding condition, in both series welding and direct welding, current is applied twice to perform welding. In series welding, voltage control (constant voltage) is performed. For welding of the first and second signal contacts 19, 23 and the first and second conductors 17, 21, the first waveform is 1.2V × 9ms and the second waveform is 1.2V × 9ms. . For the welding of the ground contact 25 and the drain wire 9, the first waveform is 1.1 V × 9 ms, and the second waveform is 1.1 V × 9 ms.

  On the other hand, in direct welding, current control (constant current) is performed. For welding of the first and second signal contacts 19 and 23 and the first and second conductors 17 and 21, the initial waveform is 0.5 kW × At 6 ms, the second waveform is 0.9 kA × 6 ms. For the welding of the ground contact 25 and the drain wire 9, the first waveform is 0.5 kW × 6 ms, and the second waveform is 0.7 kA × 8 ms.

  As shown in FIG. 10 (B), the above-mentioned two types of test pieces have their terminal pieces 43 and conductor pieces 45 bent in an “L” shape at 90 ° in opposite directions, As shown in FIG. 10C, for example, the terminal piece 43 is clamped to one chuck portion 47A of a tensile tester (not shown), and the conductor piece 45 is clamped to the other chuck portion 47B of the tensile tester. After being clamped, it is pulled by a tensile tester to perform a peel test for connection strength. The tensile speed of the tensile tester is 50 mm / min.

  The peel test strength for the two types of test pieces as described above is shown in FIG. The peel test strength by series welding is 9.9N on average, and the peel test strength by direct welding is 12.3N on average. Therefore, direct welding by the connection method of the transmission cable of this embodiment is compared with series welding. It can be seen that the strength of about 2.0 N is improved.

It is a perspective view of the connector of an embodiment of this invention. FIG. 3 is a longitudinal sectional view of the connector of FIG. 1 at a position of first and second signal contacts. It is a top view of the connector of FIG. FIG. 2 shows a cable connection method according to an embodiment of the present invention, and is a perspective view of connecting a cable to the connector of FIG. 1. FIG. 2 is an explanatory diagram of a state when a first conductor is welded to a first signal contact of the connector of FIG. 1. It is a state explanatory view when welding a drain wire to the ground contact of the connector of FIG. It is state explanatory drawing when a 2nd conductor is weld-joined to the 2nd signal contact of the connector of FIG. It is a state explanatory view when welding the 1st signal contact and the 1st conductor of the connector of Drawing 1, and the 2nd signal contact and the 2nd conductor simultaneously. FIG. 9 is an explanatory diagram of a state when welding is performed using a third electrode as in FIG. 8. (A)-(C) are schematic explanatory drawings which show the state of the peel test in each test piece. It is a graph which shows the peel test intensity | strength in each test piece.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Transmission cable 3 Conductor 5 Insulator 7 Insulated wire core 9 Drain wire 11 Tape 13 Connector 15 Connector main body 17 1st conductor 19 1st signal contact 21 2nd conductor 23 2nd signal contact 25 Ground contact 27 Lower electrode 29 For electrode insertion Hole part 31 Flat part 33 Connect part 35 Base 37 Upper electrode 39 Joint part (nugget)
41 Third electrode 43 Terminal piece 45 Conductor pieces 47A, 47B Chuck part

Claims (8)

A first signal contact projecting rearward from the connector body to connect the end of the first conductor of a cable having a pair of first and second conductors and one drain line; and A second signal contact projecting rearward from the connector body to connect the end portion of the second conductor of the cable at a position facing each other in a vertical direction so as to form a pair; The first signal contact and the second signal contact which are provided with a plurality of pairs for connecting the plurality of cables together with a ground contact projecting rearward from the connector main body at a position parallel to the two signal contacts in the left-right direction. And a plurality of the ground contacts are alternately arranged in the left-right direction at appropriate intervals,
The plurality of ground contacts are formed with electrode insertion holes through which a flat plate-like lower electrode for resistance welding can be inserted in the left-right direction at intervals between the first and second signal contacts forming the pairs. A connector characterized by having   2. The connector according to claim 1, wherein the electrode insertion hole is capable of contacting an upper surface and a lower surface of the lower electrode when the electrode insertion hole is inserted into an interval between the pair of first and second signal contacts. A first signal contact projecting rearward from the connector main body and a rearward projecting projecting from the connector main body at a position facing the first signal contact in the vertical direction with a gap therebetween A second signal contact; and a ground contact projecting rearward from the connector main body at a position parallel to the first and second signal contacts in the left-right direction, the first signal contact or the second signal When welding the end of the first conductor or the second conductor of the cable to the contact,
In the ground contact, a flat bottom electrode for resistance welding is formed with an electrode insertion hole through which the first and second signal contacts can be inserted in the left-right direction,
The lower electrode is inserted from the left and right direction into the gap between the electrode insertion hole and the first and second signal contacts,
After the end of the first conductor or the second conductor of the cable is overlapped with the first signal contact or the second signal contact in the front-rear direction, the first conductor or the second conductor of the cable is placed on the first signal contact or the second signal contact. A method for connecting cables, wherein two conductors are sandwiched between an upper electrode and the lower electrode, and are welded and joined by applying pressure and current. A first signal contact projecting rearward from the connector main body and a rearward projecting projecting from the connector main body at a position facing the first signal contact in the vertical direction with a gap therebetween A second signal contact; and a ground contact projecting rearward from the connector main body at a position parallel to the first and second signal contacts in the left-right direction. The drain contact of the cable is connected to the ground contact. When welding the ends,
An electrode insertion hole through which a flat lower electrode for resistance welding can be inserted in the left and right direction at the interval between the first and second signal contacts and can contact the upper and lower surfaces of the lower electrode. Forming part,
Insert the lower electrode through the electrode insertion hole from the left-right direction,
After overlapping the end of the drain line of the cable in the front-rear direction on the upper surface of the ground contact, the ground contact and the drain line are sandwiched between the upper electrode and the lower electrode, and are pressed and energized for welding joining. A cable connection method characterized by the above. A first signal contact projecting rearward from the connector main body and a rearward projecting projecting from the connector main body at a position facing the first signal contact in the vertical direction with a gap therebetween A second signal contact; and a ground contact projecting rearward from the connector main body at a position parallel to the first and second signal contacts in the left-right direction, the first signal contact or the second signal When welding the end of the first conductor or the second conductor of the cable to the contact and welding the end of the drain line of the cable to the ground contact,
An electrode insertion hole through which a flat lower electrode for resistance welding can be inserted in the left and right direction at the interval between the first and second signal contacts and can contact the upper and lower surfaces of the lower electrode. Forming part,
The lower electrode is inserted from the left and right direction into the gap between the electrode insertion hole and the first and second signal contacts,
After the end of the first conductor or the second conductor of the cable is overlapped with the first signal contact or the second signal contact in the front-rear direction, the first conductor or the second conductor of the cable is placed on the first signal contact or the second signal contact. Two conductors are sandwiched between the upper electrode and the lower electrode, pressurized and energized, and welded,
After overlapping the end of the drain line of the cable in the front-rear direction on the upper surface of the ground contact, the ground contact and the drain line are sandwiched between the upper electrode and the lower electrode, and are pressurized and energized for welding joining. A cable connection method characterized by: After welding the end of the first conductor to the first signal contact, and welding the end of the second conductor to the second signal contact,
The connector main body in a state where the flat plate-like lower electrode for resistance welding is inserted in the interval between the first and second signal contacts is inverted so that the second signal contact is in the upper position, After the end portions of the second conductors are overlapped in the front-rear direction, the second signal contact and the second conductor are sandwiched between the upper electrode and the lower electrode, and pressurized and energized for welding joining. The cable connection method according to claim 3 or 5, characterized in that:   After the end of the first conductor is overlapped with the first signal contact in the front-rear direction and the end of the second conductor is overlapped with the second signal contact in the front-rear direction, the first signal contact and the first signal contact One conductor is sandwiched between the upper electrode and the lower electrode, and the second signal contact and the second conductor are simultaneously sandwiched between the lower electrode and the third electrode, and are pressed and energized for welding. The cable connection method according to claim 3 or 5.   8. The connector according to claim 3, wherein the connector includes a plurality of first and second signal contacts and a plurality of ground contacts alternately arranged in parallel in the left-right direction. Cable connection method.

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