JPH01243384A - Insertion of parallel multi-core cable into printed circuit board and device thereof - Google Patents

Abstract

PURPOSE:To surely perform the insertion connection work to a board by inserting the tip section of a cable into the opening section of a socket, retreating the cover of the tip section, and butting and integrating it with the cover of a main body behind it. CONSTITUTION:A cable socket 20 bored and formed with multiple core wire insertion holes 11 is positioned at the formation position of lead insertion holes 222 of a printed circuit board 10, on the other hand the terminal section cover 103 of a parallel multi-core cable 100 is removed by the preset length L1, part of the peeled cover is left at the terminal section, a core wire exposure section 104 with the length of L3 is formed behind it. The tip terminal section with the remaining cover section is inserted into a socket opening section 22, the terminal section cover is retreated to the butting position with the cover of a rear main body section 102, lead core wires 101 are protruded by the preset length L3 at the tip section, the lead core wires 101 are protruded to the rear side of the board 10 through the core wire insertion holes 11 and the lead insertion holes 222. The insertion connection work to the board can be surely performed.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a method and apparatus for inserting and connecting a parallel multi-core flat cable to a printed circuit board.

Conventional technology A parallel multi-core flat cable is inserted into a printed circuit board,
As a method to connect the lead core wire to the circuit of the board,
Conventionally, two methods have been used. One of them is, as shown in FIG. 4, the terminal coating of the flat cable 1 is exposed, and the lead core wire 2 is exposed at the tip.
is manually aligned and inserted into the lead insertion hole 3a of the printed circuit board 3, and the protruding portion toward the back side of the circuit board is connected to the land 4a of the pattern 4 by soldering. The other method uses a board-in-type cable connector, and inserts the lead core wire exposed at the end of the flat cable into the terminal hole of the connector, connects it to a metal terminal by crimping, etc. inside the cable, and then connects it to the metal terminal. Insert the connecting pin of the connector integrated at the tip directly into the insertion hole of the printed circuit board with or without a socket, solder it to the land of the pattern on the back side, and connect the flat cable through the connecting pin of the connector. This is a method of connecting to a circuit on a printed circuit board.

Problems to be Solved by the Invention However, the first method described above connects the lead core wires 2 exposed at the terminals of the flat cable 1 to the printed circuit board 3.
The insertion hole 3a has a very narrow pitch interval.Since the insertion hole 3a is inserted directly into the fist by manual alignment, the operator needs considerable skill to insert it reliably, and there are many cases of incorrect insertion. , insertion work takes time and workability is extremely poor. Moreover, since it is in a state where it can move freely when inserted into the lead core wire 2, when it is soldered in the subsequent soldering process, the lead core wire 2 and
... will rise, reducing the reliability of soldering. Therefore, there is a problem in that a labor-intensive post-processing is required after the solder tipping, and that the correction work takes time. Therefore, in order to prevent the solder from floating during solder dipping, the lead core wires 2.2 at both ends are kinked as shown in FIG.
After being inserted into the insertion holes 3a, . . . . . . . . . However, when kink processing is performed in this manner, it becomes even more difficult to insert the insert into the insertion hole 3as-/fist than in the case described above, resulting in the problem of significantly impairing workability.

On the other hand, according to the second method described above, since the connection pin is inserted into the insertion hole of the board through a relatively rigid connection pin, the workability of the insertion work is good, and there is no floating of the lead, making it reliable. This has the advantage of allowing easy insertion connections. but,
On the other hand, this method involves inserting the lead core wire exposed at the cable end into the terminal hole of the connector, crimping it to the metal terminal, and then
A caulking process is required, and a process of integrally assembling the connector to the cable terminal must be performed.

Therefore, there is a drawback in terms of the work process, which is high cost.

This invention has been proposed in view of the above points, and it is possible to easily and reliably perform the work of inserting and connecting a parallel multi-core cable to a printed circuit board without requiring much effort or skill. The purpose is to increase the reliability of

Means for Solving the Problems In order to achieve the above object, the present invention has a hole-shaped opening corresponding to the outer shape of the cable, and a plurality of insertion holes corresponding to the lead core wires are formed through the inner bottom of the opening. While positioning and installing the socket consisting of the lead insertion hole of the printed circuit board at the formation position of the lead insertion hole,
At the same time, a part of the exposed coating is left at the terminal part, and a core wire exposed part of length L3 is formed behind it, and then the tip terminal part where the coating part remains is inserted into the socket. It is inserted into the opening, and at the same time as the insertion, the covering of the terminal part is retreated to the position where it butts against the covering of the rear main body part, and the lead core wire is exposed and protruded by a predetermined length L3 from the tip part, and this exposed lead core wire is The gist is an insertion method that protrudes to the back side of the board through the core wire insertion hole and lead insertion hole. When the cable tip is inserted into the opening of the socket, the sheathing at the tip is retracted and abutted against and integrated with the body sheathing behind it. The tip end surface of the coating left on the cable terminal is located approximately on the same line as the tip of the lead core wire.

Then, the lead core wire exposed at the tip due to the retreat of the tip covering portion is protruded to the back side of the board, and then soldered to the land of the conductive pattern on the back side of the board.

Furthermore, the present invention is characterized by a parallel multicore cable insertion/installation device having the following configuration.

That is, the present invention has a printed circuit board in which insertion holes for a plurality of lead core wires are formed, an opening having an inner hollow shape corresponding to the outer shape of the cable, into which the tip of the cable is guided and inserted, and an inner bottom of the opening. It has a plurality of core wire insertion holes formed through the board surface side corresponding to the insertion holes of the printed circuit board, and has a cable socket that is pre-inserted onto the printed circuit board and a parallel multi-core lead core wire. , the tip coating is removed by a predetermined length Ll, a part of the exposed coating is left at the tip end, and a lead core wire exposed portion of a predetermined length L3 is formed behind it. When this multi-core cable is inserted into the opening of the socket on the board from the tip end, the coating left at the tip retreats to the position where it contacts the coating on the cable body, and the tip The cable insertion device is characterized in that the lead core wire exposed at the top of the cable passes through the insertion hole of the socket and the insertion hole of the printed circuit board and projects to the back side of the board. A claw piece is formed protruding from the inner wall of the opening of the cable socket, and is adapted to lock and prevent the main body covering of the tip of the cable inserted into the opening. It is preferable that the opening has a shape that is wide on the insertion entrance side of the cable tip and narrowed on the inner bottom side.

When the tip of the cable is inserted into the opening of the socket on the printed circuit board with a portion of the exposed coating remaining at the terminal end of the working tip, the coating left on the tip will become the coating of the main body as the insertion action occurs. Move back until they meet. At the same time, a portion of the butted rear main body cover is inserted into the opening and is locked to prevent it from coming off. At the same time, as the tip covering retreats, the lead core wire exposed at the tip passes through the insertion hole of the socket and the insertion hole of the printed circuit board and protrudes toward the back side of the board. This protruding lead core wire is soldered to a pattern of lands formed around the insertion hole by solder dipping.

Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings.

1 and 2 show a parallel multi-core cable insertion device according to the present invention, in which a plurality of insertion holes 11 corresponding to the lead core wires of the cable are provided at the cable insertion position of the printed circuit board 10.・ is formed penetrating the front and back of the substrate. A conductive pattern 12 is provided on the periphery of each insertion hole 11 on the back side of the board.
A number/fist land 13 is formed. Core wire insertion hole 11
Fist・Φ is the lead core wire 101・φ of the multicore cable 100
・They are arranged in series on the same line corresponding to the arrangement of .

Attachment holes 14.14 for inserting and locking the hook pieces 21.21 of the cable socket 20 are formed on both outer sides of these insertion holes 11 and fists.

The cable socket 20 is inserted onto the printed circuit board 10 by inserting its hook pieces 21.21 into the mounting holes 14.14.

The cable socket 20 is formed by resin molding into a substantially rectangular block shape with the hook pieces 2L21 protruding downward on both sides thereof.

An opening 22 is opened in the upper surface thereof. This opening 2
2, a plurality of elongated shapes 221 corresponding to the shape of the outer sheath of each lead core wire of the multicore cable 100 are provided in a continuous manner in correspondence with the number of core wires, and each elongated shape 221
The outer covering portion of the lead core wire 101 corresponding to the portion is guided and inserted. The inner bottom of the first part 22 has a plurality of lead insertion holes 222 corresponding to the lead core wires 101 of the multicore cable 100 and corresponding to the insertion holes 11 of the printed circuit board 10. is formed through the substrate surface side. Further, a pair of claw pieces 23, 23 are formed on the opposing inner walls of the opening 22 so as to protrude inward. When the distal end of the multicore cable 100 is inserted into the opening 22, the claw pieces 23, 23 engage with the outer covering of the main body on the distal end side and prevent it from coming off. Further, the elongated shape of the opening 22 is wide on the entrance side in the cable insertion direction and is tapered toward the inner bottom side, making it easy to guide and insert the cable tip.

Further, the insertion side of the lead insertion hole 222 has a wide entrance so that the core wire 101 can be easily guided and inserted into the board insertion hole 11.

The cable 100 has parallel multi-core lead core wires 1°1...
It is a flat cable having a plurality of core wires 101 made of a conductor such as copper wire arranged in parallel and covered with an insulating coating 102. The core wire covering portion 102a that covers the outer periphery of each lead core wire 101 has a substantially round shape. The multicore cable 100 is
The approximately round shape of the core wire covering portion 102a is the lead core wire 10.
The outer shape is formed in a plurality of circular concavo-convex shapes connected in the cable width direction at a pitch interval of 1.... That is, the multicore cable 100 is formed into an integrated flat cable by connecting a plurality of insulating coated single-core round cables in parallel at a predetermined pitch in the width direction. The opening 22 of the cable socket 20 has an elongated inner shape 221 corresponding to the approximately round outer shape of the core wire sheathing portion 102a.
They are arranged in multiple rows at a pitch interval of .

At the tip of the multicore cable 100, a part of the insulation coating 102 is exposed for a predetermined length Ll, and a portion of the exposed coating remains for a length L2 at the tip end. The distal end surface of the terminal coating 103 left at the terminal portion is located approximately on the same line as the tips of the lead core wires 101 . . . at the terminal portion. An exposed portion 104 of the lead core wire 101 . . . is formed with a length L3 behind the remaining terminal coating 103. The lead core wire 101 at the tip end is coated with the terminal coating 10.
3, it is protected from bending during the lead insertion process. Then, the lead core wires 101 exposed at the tip terminal portion are connected to the printed circuit board 10.
are inserted into the insertion holes 11 through the sockets 20.

Next, a procedure for inserting and connecting the multicore cable 100 to the printed circuit board 10 according to the method of the present invention will be described.

First, as shown in FIG. 3(A), the hook pieces 21.21 on both sides of the cable socket 20 are inserted and locked into the mounting holes 14.14 of the printed circuit board 10, and the socket 10 is inserted into the mounting hole 14.14 of the printed circuit board 10. It is held securely in place.

At this time, the insertion holes 11 of the printed circuit board 10 correspond to the insertion holes 222 of the socket 20, respectively.

Next, the tip end portion of the multicore cable 100 is inserted into the opening 22 of the socket 20 on the board 10. The end portion of this multicore cable 100 has been subjected to the above-described terminal processing in advance. In this terminal processing, the coating 102 at the tip of the cable is first stripped to a predetermined length Ll, and then the excess portion of the exposed coating is cut and removed, resulting in a portion of the coating 102 as shown in FIG. , a length Ll is left at the tip of the terminal portion. As a result, an exposed portion 104 of the lead core wire 101 is formed with a length L behind the terminal coating 103 left at the tip.
Formed by 3. After the terminal is processed in this way, the terminal is guided and inserted into the opening 22 of the socket 20. By inserting the cable tip, as shown in FIG. 3(b), when the tip end surface of the terminal sheath 103 comes into contact with the inner bottom surface of the opening 22, the end sheath 103 is held at the abutting position. Furthermore, when the cable terminal part is inserted into the opening 22, the cable main body part 102 behind it is pushed into the opening 22 as shown in FIG. Being forced into it.

When the cable main body 102 is pushed into the opening 22, the length L3 of the exposed portion 104 of the lead core wire 101...
is compressed with the insertion operation.

And the terminal coating 103 at the tip held by the inner bottom surface
is relatively retreated toward the main body covering 102 side with the cable insertion operation. Furthermore, the cable main body 102
is pushed into the opening 22, the lead core wire 101
・The length L3 of the exposed part 104 of the fist becomes 0, and the opening 2
2, the end cover 103 is butted against the main body cover 102 behind it and integrated. Then, terminal section 8!10
3, the lead core wires 101 are exposed and protruded at the tip of the cable terminal portion by a length corresponding to the length L3 of the exposed portion 104. Lead core wire 101 exposed at the tip of this terminal part
... is inserted into the opening 22 of the main body 102, and
20 corresponding lead insertion holes 222...
- Guided and inserted into the core wire insertion hole 11 of the printed circuit board 10 through the wire. Then, it protrudes toward the back side of the substrate by a predetermined length H (see FIGS. 3(c) and 3(d)). This length H is
The length is set to be suitable for soldering dip. The protruding length H of the lead core wires 101... is determined according to the exposed length L3 of the lead core wires 101... at the tip of the cable. Therefore, the length L3 of the core wire exposed portion 104 formed at the cable terminal portion described above needs to be adjusted in advance so that the protrusion length H to the back surface of the board can be reliably obtained.

The main body of the cable terminal is shown in Figure 3 (c) and (d).
As shown in , when the main body covering part 102 and the terminal covering part 103 are butted together and integrated into the opening 22, when the main body covering part 102 is completely inserted into the opening part 22, the claw piece 23 is inserted into the opening part 22. .23 to prevent it from coming off. As a result, the cable end portion is inserted and temporarily fixed into the connection position of the printed circuit board 10 via the socket 20.

In this case, the main body covering portion 102 is inserted into the opening 22 so that the claw piece 23
．． 23, the cable end portion can slip out of the socket 20 or the lead core wire 101 protruding from the back side of the circuit board 10 can be inserted into the insertion hole 11 of the circuit board 10.
There's no getting out of it.

After the terminal portion of the multicore cable 100 is inserted and temporarily fixed into the insertion position of the printed circuit board 10 via the socket 20, the printed circuit board 10 is then subjected to a soldering dip process. In this solder dipping step, the lead core wires 101 protruding from the back surface of the printed circuit board 10 are soldered to the lands 13 of the circuit pattern 12 together with the leads of other components as shown in FIG. 3(E). At that time, multi-core cable 100
Since the terminal covering portion 102 of the lead wire 102 is prevented from coming out by the claw pieces 23 and 23 within the opening 22, the lead core wires 101... are not lifted up or pulled out from the board by the force of the molten solder, as in the conventional case. This phenomenon disappears, and it is possible to perform good solder dipping with a protrusion length H suitable for soldering.

Then, when the cable end is guided and inserted into the socket opening 20 on the board 10, the lead core atot at the tip
・Fist, socket, lead insertion hole 222 of Soto 20...
Through the core wire insertion holes 11 of the substrate 10, the core wires are smoothly and easily and reliably guided and inserted without any erroneous insertion. Therefore, the insertion work can be carried out without requiring much skill.

Effects of the Invention As described above, according to the present invention, by simply guiding and inserting the cable end into the socket opening on the board, the lead core wire can be smoothly inserted into the insertion hole of the printed board without misinsertion. Moreover, it can be guided and inserted easily and reliably.

Therefore, the work of inserting and connecting the parallel multicore cable to the printed circuit board can be easily and reliably performed without requiring much effort or skill. Since lifting of the lead core wire can be reliably prevented during the L1 solder dipping, post-processing after the solder dipping is unnecessary, and the solder modification rate can be minimized. Also, as a result,
The reliability of soldering connections can be increased.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view showing a parallel multi-core cable insertion device according to the present invention, FIG. 2 is a partially cutaway perspective view of a cable socket constituting the device, and FIGS. ) are sectional views explaining the process steps of the cable insertion method according to the present invention, and FIG. 4 is an exploded perspective view showing a conventional example. 10... Printed circuit board, 11 φ core wire insertion hole, 20... Cable socket, 21.21... Hook piece, 22... Opening, 222... Lead insertion hole, 1oo-excellent・Parallel multicore cable, 101・O・Lead core wire, 102... Cable body (sheathing) part, 103I... Terminal coating, 104... Core wire exposed part. Patent applicant: NEC Home Electronics Figure 2 Figure 3 Figure 3 (c)

Claims (7)

[Claims] (1) A socket with a hole-shaped opening corresponding to the external shape of a parallel multi-core cable and a plurality of insertion holes corresponding to the lead core wires formed through the inner bottom of the socket is inserted into the lead insertion hole of the printed circuit board. While positioning and installing the multi-core cable at the formation position, the tip end coating of the multi-core cable is removed by a predetermined length L1, and a part of the exposed coating is left at the terminal end, and a core wire of the length L3 is placed behind it. forming an exposed portion, then inserting the distal end with the covering portion left into the opening of the socket on the substrate, and at the same time as the insertion, retracting the covering of the distal end to a position where it abuts against the rear main body covering portion; A printed parallel multi-core cable characterized in that a lead core wire is exposed and protruded by a predetermined length L3 from the tip part, and the exposed lead core wire is made to protrude to the back side of the board through the core wire insertion hole and the lead insertion hole. How to insert it into the board. (2) The method for inserting a parallel multi-core cable into a printed circuit board according to claim (1), characterized in that the main body covering portion is butted and integrated by retreating the tip end covering, and is locked in the opening to prevent it from coming off. . (3) Claim (1) characterized in that the tip of the remaining tip portion coating is located approximately on the same line as the tip of the lead core wire.
) How to insert the parallel multicore cable into a printed circuit board. (4) Claim (1) characterized in that the lead core wire exposed at the tip portion is protruded to the back side of the board through the core wire insertion hole and the lead insertion hole, and then subjected to solder dipping.
How to insert the described parallel multicore cable into a printed circuit board. (5) A printed circuit board in which insertion holes for a plurality of lead core wires are formed, an opening having an inner cavity shape corresponding to the outer shape of the cable, into which the tip of the cable is guided and inserted, and an inner bottom of the opening for the board. It has a plurality of core wire insertion holes formed through the board surface side in correspondence with the insertion holes, a cable socket that is inserted in advance on the board, and a parallel multi-core lead core wire, and has a tip thereof. A parallel multi-core structure in which the coating is removed by a predetermined length L1, and a part of the exposed coating is left at the tip end, forming an exposed portion of the lead core wire having a predetermined length L3 behind it. When the multi-core cable is inserted into the opening of the socket on the board from the tip end, the tip sheathing retreats to a position where it abuts the sheathing on the cable main body, and the exposed lead A device for inserting a parallel multi-core cable into a printed circuit board, characterized in that the core wire is projected to the back side of the circuit board through an insertion hole of the socket and an insertion hole of the printed circuit board. (6) A parallel multi-core cable according to claim (5), characterized in that a claw piece is formed on the inner wall of the opening to lock and prevent the inserted multi-core cable from coming off. A device for inserting core cables into printed circuit boards. (7) Claim (5) characterized in that the opening is formed in a shape that is wide on the entrance side and reduced on the inner bottom side.
A device for inserting the described parallel multi-core cable onto a printed circuit board.