JP3042811B2 - Terminal fixing method for micro coaxial cable and terminal fixing member - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of fixing an ultrafine coaxial wire having a small conductor size of, for example, 40 AWG or less to a housing serving as an outer shell of a connector with a terminal attached thereto, and a terminal fixing member therefor. Regarding the offer.

[0002]

2. Description of the Related Art In recent years, OA equipment, ME equipment, and the like have tended to have higher performance and smaller size, and electric wires to be connected thereto have been thinned and densely packed without exception. .

[0003] The electric wires to be wired to the above-mentioned precision instruments are generally of a coaxial structure having an external shield for the purpose of avoiding malfunctions and crosstalk caused by external noise. In the high-density mounting described above, a plurality of shielded wires are collectively protected and covered with a sheath, and the shields of the respective coaxial shielded wires are collectively connected to a ground wire at an end. The usual practice was to ground all at once.

[0004] However, if the mounting space is limited due to the restriction of the structure of the equipment, the above-described collective connection method to the ground wire may not be applicable, and if the shield wire is a micro coaxial wire, When an external force is applied to the inner core, there is a risk of disconnection.

[0005] Therefore, the shielded wires are collectively grounded by simple means, the cores are aligned and the tension is evenly distributed, and the method of fixing the shielded electric wire, which enables orderly fixing from the external appearance, and directly to the method. The fixing members used have already been proposed by the applicant. (Japanese Patent Application No. 61-12399
No. 7) In this proposal example, a housing having a large number of slots serving as a fixing base and a holder serving as a fixed support having a large number of cuts corresponding to each slot of the housing are used. The terminal of the grounding piece is stored and fixed in a part of the selected slot, and the extended end of the grounding wire of the grounding piece is inserted into a cutout of a part of the holder so that the holder is spaced apart and opposed to the housing. With
The terminals of each core of multiple shielded wires are stored and fixed in the slot left for the housing, and each bare core is inserted into the remaining notch of the holder while loosening, and the conductive The extended end of the ground wire and the separated shielded wire of the shielded wire are integrated with the conductive tape by soldering.

According to such a method of fixing an electric wire with a shielded wire and a fixing member, each of the shielded wires, which are exposed and separated from a plurality of electric wires with a shielded wire, is soldered to a conductive tape wound on a fixed support. Therefore, the heat capacity at the time of soldering can be reduced, the soldering is completed in a short time, and the heat effect on the internal core is small, so that problems such as withstand voltage failure and short circuit can be solved. The terminal provided at the end of the exposed core of the shielded wire is housed and fixed in the slot of the housing, and is fixed to the housing through the ground wire of the grounding piece extending from the terminal housed and fixed in the slot of the housing. Insert a bare core that extends by giving a predetermined slack to the notch of the holder arranged at intervals, further soldering and unifying the separated and separated shield wire to the conductive tape wound around the holder. Since the exposed core (rise portion) is fixed, the exposed core can be extended in a substantially linear state while maintaining a certain slack between the housing and the holder, even if the shield wire is bent. Since no extreme bending or tension is applied to the core, the stress applied to the core alone is minimized, preventing breakage of the core. Out cores are aligned at regular intervals without extreme sag that, deterioration of the suppression of the crosstalk characteristics required for the shield wire is ensured. Since the exposed core is arranged neatly between the holder and the housing, the appearance is also improved. That is, the effect can be achieved.

[0007]

According to the above-mentioned prior art, it is effective as a method for connecting a coaxial line up to 38 AWG to a connector, but the conductor connection size is 40 AW.
When trying to connect a micro coaxial cable of G or less to the connector, further improvement in handling of the micro coaxial cable has been demanded. Therefore, there has been proposed a method of directly butting and soldering a core of a micro coaxial cable and a lead wire of a terminal through a printed circuit board. However, when the core and lead wire of the micro coaxial cable are directly butt-soldered, the soldering area becomes small and the soldering work becomes difficult, and the distance between the spacer to be shielded and the intermediate point between the printed board and There is a problem that the reliability of the soldered portion becomes insufficient because the length is extremely short.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the prior art, and it is an object of the present invention to improve the workability of a soldering connection portion of a micro coaxial cable and improve the reliability of the soldering portion. It is an object of the present invention to provide a method for attaching and fixing a terminal for a micro coaxial line and a member for fixing the terminal for the same, which is improved.

[0009]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a method for fixing a terminal of a micro coaxial cable to a housing having a plurality of slots and a housing corresponding to each slot of the housing. Using an injection molded board having a large number of through holes and lands, and further using a holder having a number of notches corresponding to each slot of the housing and the through hole of the injection molded board,
An earth terminal having an earth lead and a terminal having an inner conductor lead are housed and fixed in a slot of the housing, and thereby the earth lead and the inner conductor lead extending outside the housing are injection-molded. Insert the lead wire for the internal conductor into the through hole of the board, solder it so as to straddle the land unique to the through hole, and further extend the coaxial cable with the extension end of the ground lead wire extended from the injection molded board Insert the exposed inner conductors into the notch of the holder, wrap a conductive tape around the notch of the holder and fix it. And integrated with the solder, and the extension end of the exposed inner conductor of the coaxial line is provided so as to face the side of the injection molded board .
It is characterized in that it is soldered to the side surface of the land.

[0010] The terminal with a fixing member used for carrying out such a method had a number of slots that only housing fixed to a terminal having a terminal and the internal conductor lead having a ground lead wire A housing, an injection-molded substrate having a large number of through-holes and lands for inserting the ground lead and the internal conductor lead of the terminals, an extended end of the ground lead and a micro coaxial line A holder having a number of cutouts just for inserting the bare core of the holder, and a shielded wire which is wound around the cutout surface of the holder and is fixed to the extended end of the ground wire and the bare coaxial wire. the comprise a conductive tape for causing marked bulk solder, cut in the holder
Land the inner conductor of micro coaxial cable extended through the notch
The land is to be soldered to the side of the injection molded board
It is provided so as to face the surface .

[0011]

FIG. 1 (a) (b) (c) (d) (e) (f)
1 shows a preferred embodiment of a method for fixing a terminal of a micro coaxial cable according to the present invention for each step. FIG. 2 shows an example of an injection molded board used in the embodiment,
FIG. 3 shows an example of a holder used in the embodiment, and FIG. 4 shows a state of a soldering process in the embodiment.

As can be understood from FIGS. 1 (a) to 1 (f), this terminal attaching and fixing method uses a housing 1 as a fixing base, an injection molded board 2 as a relay connecting member, and a holder as a fixing support. 3 is used.

Thus, as is apparent from FIG. 1A, the housing 1 has a large number of partitioned slots 11,1.
., And terminals can be conveniently stored and fixed therein. Preferably, the terminals 4 housed and fixed in the slots at the four corners are used for grounding, and the grounding lead wires 41 attached to the terminals 4 in advance.
Extend outside the housing 1.

As shown in FIG. 2, the injection molded board 2 has the same number of through holes 22, 22, 22,...
The land 23 surrounding each of the through holes 22 is provided so as to face the side surface of the insulating substrate 21.

As shown in FIG. 3, the holder 3 has the same number of notches 32 as the slots 11 of the housing 1 and the through holes 22 of the injection-molded substrate 2 on both side edges of the insulating substrate 31. is there.

A method of attaching and fixing a coaxial cable to the terminals using the above-described components will be described. First, as shown in FIG. 1A, a terminal 4 having a ground lead 41 is connected to four corners of a housing. 4 and the four grounding leads 41 are extended from the housing, and then, as shown in FIG.
1 is received and fixed in all or a part of the remaining slot 11 of the housing, and the lead wire 51
Extend from the housing.

When one terminal storage and fixing operation is completed as described above, as shown in FIG.
Is placed on the housing 1 through the through hole 22 through the ground lead wire 41 and the internal conductor lead wire 51. The internal conductor lead wire 51 terminates at a portion protruding from the through hole 22, and the one ground lead wire 41 protrudes from the through hole 22 and further extends.

When the setting of the injection-molded substrate 2 is completed as described above, as shown in FIG. 1 (d), all the through holes 22 through which the lead wires are passed extend over the lands 23 unique to the through holes. Is performed as described above. In addition,
The soldering process on the ground lead wire 41 is performed to set the injection molded board in the housing and fix it so as not to move, without the purpose of electrical connection to the land. It does not require as rigorous soldering as wire soldering. In some cases, the soldering process need not be performed.

Next, as shown in FIG. 1 (e), the spacer 7 is appropriately fitted to the ground lead 41, and the ground lead 4
1 and the holder 3 is arranged. Further, the remaining notch 32 is extended to the lower side of the holder through the internal conductor 81 exposed at the end of the micro coaxial line 8. Then, a conductive tape 9 made of copper or the like is wrapped around the periphery of the holder 3 facing the notch and fixed. Further, the grounding lead wire 41 protruding above the holder 3 is folded back so that the terminal is outside the conductive tape 9. At the same time as being integrated with the edge by soldering, the shielded wire 82 which is bare and separated from the micro coaxial wire 8 is also integrated with the outer edge of the conductive tape 9 by soldering.
Thus, a series of shield processing ends.

Finally, as shown in FIGS. 1 (f) and 4, the end of the inner conductor 81 in the micro coaxial line extending from the holder 3 is soldered to the side surface of the land 23 (see FIG. 2) of the injection molded board. Attachment processing 10 ends the connection of the internal conductor.

According to this embodiment, about 3 wires per wire core
Connection processing is possible in about seconds, and is 1 /
It has been found that a time reduction of 5 is possible.

[0022]

According to the method and the member for fixing a micro coaxial line of the present invention as described above, problems such as a withstand voltage failure and a short circuit can be solved, and the stress applied to a single core can be reduced. Minimize disconnection, prevent cross-talk characteristics from being deteriorated, and reliably improve the appearance. The ground lead wire and the internal conductor lead wire are once inserted into the through hole of the injection molded board, soldered so as to straddle the land unique to it, and the micro coaxial cable extended through the notch in the holder The inner conductor of the wire is soldered to the side of the land to achieve a series of inner conductor connections, so even if the coaxial cable is difficult to handle, reliable soldering can be performed quickly. It can be carried out.

[Brief description of the drawings]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows an embodiment of a method for attaching and fixing a terminal of a micro coaxial cable according to the present invention, (A) shows a step of housing a terminal having a ground wire lead, and (B) shows a lead wire for internal conductor. (C) shows a process of assembling an injection molded board, (d) shows a soldering process on a lead wire, and (e) shows a process of assembling a holder and inserting / shielding a micro coaxial cable. (F) shows the completed state after the soldering process of the internal conductor.

FIG. 2 is a perspective view showing an example of an injection molded substrate in the embodiment.

FIG. 3 is a perspective view showing an example of a holder in the embodiment.

FIG. 4 is an explanatory view of a main part showing a state of soldering the internal conductor in the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Housing 11 Slot 2 Injection-molded board 21 Insulated board 22 Through hole 23 Land 3 Holder 31 Insulated board 32 Notch 4 Terminal (for grounding) 41 Grounding lead 5 Terminal (for internal conductor) 51 Leading wire for internal conductor 6 Solder Attaching process 7 Spacer 8 Micro coaxial line 81 Inner conductor 82 Shielding wire 9 Conductive tape 10 Soldering process

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hiroshi Komuro 5-1-1 Hidaka-cho, Hitachi City, Ibaraki Prefecture Inside the Hidaka Works, Hitachi, Ltd. (72) Inventor Hideki Saito 4 Kawajiri-cho, Hitachi City, Ibaraki Prefecture No. 10-1 in Hitachi Cable Assembly Co., Ltd. (56) References JP-A-62-281287 (JP, A) JP-A-5-13118 (JP, A) (58) Fields investigated (Int. ⁷ , DB name) H01R 4/02 H01R 24/02 H01R 43/02

Claims (2)

(57) [Claims] A housing having a large number of slots, an injection molded board having a large number of through holes and lands corresponding to the slots of the housing, and a slot in the housing and a through hole of the injection molded board. First, a ground terminal having a ground lead and a terminal having an internal conductor lead are received and fixed in a slot of the housing by using a holder having a correspondingly large number of cutouts. Insert the ground lead wire and the internal conductor lead wire extended to the outside into the through hole of the injection molded board, and solder at least the internal conductor lead wire so as to straddle the land unique to the through hole, Furthermore, the extension end of the ground lead wire extended from the injection molded board and the exposed inner conductor of the coaxial line are Into the notch of the holder, wrap the conductive tape around the notch of the holder and fix it.Then, the grounding lead wire and the stripped shield wire of the coaxial wire are soldered and integrated, and then the coaxial wire The exposed end of the inner conductor faces the side of the injection molded board
Terminal fixing method for a micro coaxial cable, which is soldered to a side surface of a land provided as described above. Wherein a housing having a number of slots that only housing fixed to a terminal having a lead wire terminal and the internal conductor having a ground lead wire, the lead wire grounding lead wire and the inner conductor thereof terminal Injection-molded substrate having a large number of through holes and lands only to insert the same, and a large number of notches only to insert the extended end of the ground lead and the bare core of the micro coaxial line. The holder is provided with a conductive tape for collectively soldering the extended end of the ground wire and the shielded wire separated and separated from the micro coaxial wire , which is wound around and fixed to the periphery of the cutout surface of the holder. Through the notch
Solder the inner conductor of the extended micro coaxial cable to the side of the land
So that the land faces the side of the injection molded substrate
A member for fixing a terminal of a micro coaxial line, wherein the member is provided in a terminal.