DE1926730A1 - Connection socket for printed circuits and method for their insertion - Google Patents

Description

DIPL.-ING. GÜNTHER EISENführer DI.PL.-ING. DIETER K. SPEISER PATENTAN CHOICES File number - new registration 28 BREMEN 1

BORGERMEiSTER-SMIDT-STa SB REGISTRATION NAME: MOLEX PRODUCTS COMPANY (THI-HIOAO-HABSi

TELEPHONE: (0421 | 313 * 77 TELEQRAMMErFEHHOPAT

BREMER BANK ISO 9072

" _Nn POST CHECK HAMBURG2557β7

US. CHARACTER: Ά JV ·

Date: May 23, 1969

MOLEX PRODUCTS COMPANY, incorporated under the law of the State of Illinois at 5224, Katrine Avenue, Downers Grove, Illinois, 60515 (V. St. A.)

Connection socket for printed. Circuits and procedures for their insertion ... .

The invention relates to a connector for circuit boards with printed circuits, in particular a connector for attaching electrical components a circuit board, and preferred methods of assembling multiple terminals in a circuit board.

According to the prior art, multi-pole electrical Components, e.g. semiconductors such as transistors »diodes or integrated circuits in microelectronic components, electrically to connect to the conductors printed on a surface of a circuit board, holes in provided on the circuit board, which these conductors penetrate and into which the connecting wires of the components are inserted will. After the leads have been inserted into the holes, they are, generally with Using a wave soldering technique, connected to the corresponding printed copper conductors on the board.

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If it becomes necessary to replace the component, the connecting wires must be separated or heated and soldered at the same time and the component from the circuit board removed. This is often not possible if, for example, circuit boards are installed in places that are Soldering iron are not accessible. Furthermore, the component can be damaged by excessive heating when attempting to deja unsoldering them from the board will be damaged.

In some cases connection devices are used, around the connecting wires with the printed conductors. to connect to the circuit board. This connection device a however, they are expensive and do not solve the problem of removing a component to be replaced from the circuit board in a satisfactory manner .

The object of the invention is to provide a terminal for effective and reliable ^ but detachable fastening to provide an electrical component on a printed circuit board that is inexpensive to manufacture and easy to use. In particular, should the terminal according to the invention for connecting a single connecting wire to an electrical Component with a printed conductor of a circuit board are used in such a way that the connecting wire is easily re-established is solvable.

Furthermore, according to the invention, a preferred method is proposed for the simultaneous assembly of several terminals according to the invention in a circuit board.

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Further, according to the present invention, another is preferred A method for the easy and quick assembly of several connection terminals according to the invention in a circuit board is proposed.

A preferred embodiment of an inventive Terminal consists of a cylindrical sleeve, one end of which is tapered and inserted into a hole plugged into a circuit board with a printed circuit board is. The first end of the connector is soldered to an associated printed conductor on the board, preferably by a wave soldering process. A second end of the sleeve, the nrit an elastic contact part is equipped, protrudes from the opposite surface of the board. A single lead wire an electrical component is inserted into the second end of the sleeve and is so with the contact part in engagement that it is mechanically and electrically connected to this. The connection terminal exists from a single piece of stamped metal rolled into a hollow cylinder.

Several connection terminals according to the invention can be manufactured in a chain-like manner. All connection terminals According to the invention, such a chain can be inserted into the board either together and simultaneously inserted or individually separated from the chain and quickly and easily inserted into the board one after the other will.

The invention is described below with reference to the drawings illustrated embodiments in detail. purifies. It shows:

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Pig. 1 is a perspective view of a multi-pole electrical component that is formed with the aid of several Terminals according to the invention connected to a printed circuit board is;

FIG. 2 is an enlarged, partially sectioned, isometric view of a single one according to the invention Terminal in which a wire is inserted and which is connected to a printed conductor on the circuit board;

FIG. 3 shows an elevation of the connection terminal according to FIG. 2 with a cut circuit board; FIG.

FIG. 4 shows an enlarged, axial section 4-4 according to FIG. 2;

FIG. 5 shows a cross section 5-5 according to FIG. 4;

6 shows a perspective illustration of several according to the invention Terminals, which according to the invention are connected to one another in a chain-like manner by a strip and in holes one PCB are mounted;

Fig. 7 is a section 7-7, in which the separation of the individual terminals from the strip according to Fig. 6 is shown after its assembly in the board;

Θ to 10 show some essential steps of a preferred method according to the invention for the easy and rapid assembly of several individual connection terminals according to the invention one after the other in holes in a circuit board;

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Pig. 11 is an elevation of an alternative embodiment of a connector according to the invention; which is mounted in a circuit board shown in section;

Pig. Figure 12 is an enlarged, sectional elevation of the connector of Figure 11;

Pig. Figure 13 is a fragmentary sectional elevation of the connector of Jig. 11 and 12, in which has a wire inserted;

Pig. 14 shows a section 14-14 according to FIG. 13;

Pig. Fig. 15 is an elevation view of a metal strip connected to a connector according to Pig. Il shaped to 13 can be;

Pig. 16 shows a cross section of the metal strip according to Pig. 15 after becoming a hollow cylinder has been rolled, but before the wall bars have been bent inward;

Pig. 17 shows a cross section similar to FIG. 16, in which is shown is how matrices can be used to shape the inwardly curved wall webs.

According to FIG. 1, a multi-pole electrical component 10 has a plurality of connecting wires 12. The connecting wires 12 the electrical component 10 are connected with the aid of a corresponding number of connection terminals 18 according to the invention connected to the associated printed conductors 14 on the underside 28 of a circuit board 16. First ends 20 of the Terminals 18 stick from the top 24 of the board 16 forth in holes 22 of the board 16. The ends 20 extend through the board 16 so that the outer-00983 6/17 2 9

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Most tips 26 protrude beyond the bottom 28 and the printed conductor 14 of the board 16 to the soldering of the terminals 18 with the printed conductors 14 to enable. The connecting wires 12 of the electrical component 10 are detachable in second, upper ends 30 of the associated terminals 18 inserted, in which they mechanically and electrically with the terminals 18 are connected.

According to Pig. 2 to 5 is an embodiment of an erfc inventive terminal 18 in a hole 22 a Board 16 inserted. The terminal 18 consists essentially of a sleeve 19, which consists of a single A piece of resilient metal is made which has been rolled into a cylinder in a known manner, so that an internal channel 27 is created. The outermost lower tip 26 of the sleeve 19 is round or conical, so that one end of the internal channel 27 is closed and the insertion of the end 20 into the hole 22 is facilitated. The opposite, second end 30 of the terminal 18 has an opening 29. Die The sleeve 19 has a parting line 32 which extends over the entire length of the sleeve 19. According to Pig. 2 is "the parting line 32 in the hole 22 at the first, lower end 20 of the connection terminal 18 narrows and widens towards the second, upper end 30 of the connection terminal 18. Due to the elasticity of the metal from which the terminal 18 is made, the terminal 18 in the free state tries to open along the parting line 32. After the end 20 of the connector 18 has been inserted into a hole 22 of a circuit board 16, the diameter of which is smaller than the diameter of the end 20 in the free state, produces the end 20, in that it tends to move along the parting line 32 to open, a friction fit in the hole * This

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good positioning of the connector 18 in the hole 22 ensures and the sliding out of the terminal 18 from the hole 22 both before and after prevented from soldering.

The diameter of the end 20 of the terminal 18, the Length is less than half the length of the terminal 18 is smaller than the diameter of the End 30. At the joint between the two ends 20 and 30, a shoulder 34 is created, which prevents the penetration of the lower end 20 in the hole 22 of the circuit board 16 is limited.

The second end 30 of the terminal 18 is with a Equipped with elastic, tongue-like contact 36 which is punched out of the sleeve 19 of the connection terminal 18. According to Pig. 3 and 4, the contact 36 is bent so that its free end 40 inwardly into the channel 27 of the sleeve 19 protrudes and rests against an inner wall 42 of an indentation 38 which is in the sleeve 19 of the connecting terminal 18 the contact 36 was formed opposite.

According to Fig. 3 is. the free end 40 of the contact 36 is curved and rests against the inner wall 42 of the indentation 38, so that a constriction arises in the channel 27. if however, according to FIGS. 4 and 5, an Enae 1 "; · of a connecting wire 12 of an electrical component 10 is inserted through the opening 29 of the end 30 into the channel 27, the elastic contact 36 is deflected and the wire 12 is held between the contact 36 and the bulge 38. The curved free end 40 of the contact 3b acts as a cam surface that allows the lead wire to be inserted 32 in the terminal 18 facilitated.

Immediately below contact 36 and Vand 42 0 0 9 8 3 6/1729 ORIGINAL INqp _{£ Cted} '

the indentation 38 protrudes on the shoulder 34 a stop 44 into the sleeve 19. According to FIGS. 4 and 5, the stop limits 44 the penetration of the end 13 of the connecting wire 12 into the second end 30 of the connecting terminal 18. Furthermore the stop 44 prevents the penetration of solder into the end 30 of the sleeve 13 of the terminal 18, if the circuit board 16 passes through a solder bath or is soldered by hand. ·

2-4, the end 20 of the terminal fc 18 is connected to the printed conductor 14 by means of solder 48 of the circuit board 16, so that the connection terminal 18 is mechanically and electrically connected to the printed conductor 14 connected is. The frictional fit of the end 20 in the hole 22, combined with that on the terminal 18 and The solder 48 applied to the printed conductor 14 creates a Adequate mechanical holding force to prevent the terminals 18 from coming out of the holes 22 in the board 16 can be pulled out when the connecting wires 12 are pulled out of the ends 30 of the connecting terminals 18.

The functional interaction of the W individual parts described so far is described in detail below.

First, a circuit board 16 of a conventional type having a plurality of printed conductors 14 on one surface thereof 28 provided. Several holes 22 of a predetermined diameter that the circuit board 16 and the printed Penetrate conductor 14 are used to accommodate a corresponding number of connecting wires 12 of an electrical Component 10, so that the electrical component 10 is mechanically and electrically connected to the conductors 14 connected is. In each of the holes 22 is from the surface 28 opposite surface 24 of the circuit board 16 a connection terminal 18 is inserted. The summit

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26 of the terminal 18, which is inserted first in the hole 22 is introduced is tapered as shown in FIGS. 2 to 4 to facilitate the insertion of the terminal 18 into the hole 22. By inserting the conical tip 26 into the hole 22, the parting line 32 of the rolled sleeve 19 of the terminal 18 is closed so that the end 20 can be easily inserted into the hole 22. When the end 20 is in the hole 22 of the board 16, it will tend to curl up again and assume its normal shape, pressed against the board wall of the hole 22 so that the terminal 18 is held in the hole 22. The end 20 of the terminal 18 can only be up into the hole 22 to the shoulder 34 connecting the ends 20 and 30 of the terminal 18 together. The end of the 20th however, it penetrates the circuit board 16 so that the tip 26 protrudes above the surface 24 and the printed conductor 14. In this way, all of the terminals 18 provided for the circuit board 16 are successively inserted into the circuit board 16 plugged in.

When all the terminals 18 are plugged into the circuit board 16 the ends 20 are soldered to the associated printed conductors 14 of the board 16, either manually or by a wave soldering process, with the help of which the many soldered connections are made in a short time can be produced. By having all the required soldered connections be completed before the electrical components 10 are mounted on the circuit board 16, is the Aufheitzen the connecting wires 12, through the

the electrical component 10 could be damaged, avoided.

After completing the work described above,

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the connecting wires 12 of an electrical component 10 can be plugged into the associated connecting terminals 18. The curved end 40 of the contact 36 facilitates the insertion and removal of the end 13 of the connecting wire 12.

As already described "according to Pig. 3 and 4 by inserting a connecting wire 12 into the end 30 of the terminal Ib of the tongue-like, elastic contact 36 pushed away from the wall 42 of the indentation 38. } The restoring force of the contact 36 that tries to Pressing contact 36 into its normal position against wall 42 produces satisfactory electrical properties and mechanical connection between terminal 18 and connecting wire 12 ..

According to Pig. 11 to 17 an alternative embodiment of the connection terminal according to the invention is similar, like the one in Pig. 2 to 5 shown embodiment, but with the exception of the special means of manufacture the conductive connection with the connecting wire 12. Accordingly, the last embodiment of the invention Terminal marked by reference number 18 '™. In the same way, those egg - Properties and elements of the embodiment according to Pig. 11 to 17, which are the same as those of the embodiment according to FIG Pig. 2 to 5 are identified by the same reference numerals as in Pig. 2 to 5, but also with the additional index.

The terminal 18 'is in connection with a circuit board 16 'with printed conductors 14' in the same way used like terminal 18. Therefore, a detailed description of the application is unnecessary of connection terminal 18 ·, it is only referred to here

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corresponding description of the terminal 18 indicated.

According to FIGS. 11 to 13, the connection terminal differs 18 * from the connection terminal 18 in several details; however, the only significant difference between the terminals 18 * and 18 is the elastic Contact part which is used to clamp the connecting wire 12 ·. 12 is the end 30 'of the terminals 18 * equipped with several inwardly curved wall webs 82. Each of the wall webs 82 is arcuate curved, with curvatures in horizontal and vertical planes. As a result, 'form the wall webs 82 in the Part 30 'of the sleeve 19' has an hourglass-like channel 27 '.

The hourglass-like channel 27 'has a maximum radius at the opening 29' of the connection terminal 18 'and, due to the curvature of the wall webs 82, narrows to a minimum radius in the middle of the end 30 * and then widens again up to the transition to the end 20' . The term "radius" used above is defined as the shortest distance from the center line of the terminal 18 * to the nearest surfaces of one of the curved wall webs 82. This radius is represented in FIG. 17 by the distance "A". In order to ensure that the connecting wire 12 * is securely clamped, the minimum radius "A" of the channel 27 ^{f is} smaller than the radius of the connecting wire 12 * to be clamped therein. *

Figures 15 to 17 show the production of the invention Terminal 18 *. First, a metal strip 90 with elliptical cutouts 92 and corresponding elliptical notches 94 on the parallel edges 95 manufactured. Then the strip 90 becomes one

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Rolled cylinder with adjacent edges 95, see above that a parting line arises. This will be the lower part bent inwards so that the round or conical tip 26 is formed. After rolling up, the strip possesses 90 according to Pig. 16 only three elliptical cutouts 97 'of which two from the elliptical cutouts 92 and the third emerged from the elliptical notches 94 lying next to one another.

According to FIG. 16, the wall webs 82 are after rolling the fe strip 90 in cross section curved radially outward and not radially as in the end product according to FIG. 12 curved inside. Furthermore, each of the wall webs 82 is separated from the adjacent wall web 82 by one of the elliptical ones Cutouts 97 separated. In order to produce the final product according to FIG. 1, the rolled strip 90 according to FIG.

16 subjected to a deformation as shown in FIG. 17. By means of which the wall webs 82 are bent inward, so that their edges touch and the elliptical cutouts 97 as shown in FIG. 16 are eliminated. As a result of this deformation arise between the wall webs 82 according to FIG.

17 parting lines 97 '. The parting lines 97 'get the curved wall webs 82 a certain elasticity, so

ψ that by inserting a connecting wire 12 '. can be pushed apart.

After connecting terminal 18 'to the circuit board. 16 'soldered is in advance, the connecting wire 12 'can be inserted through the opening 29' of the end 30 '. If the Connecting wire 12 'inserted into the hourglass-like channel 27' is, it comes into engagement with the inwardly curved wall webs 82, so that the further introduction of the connecting wire 12 ', the wall webs according to FIG. 13 and 14 are pressed apart. The apart-

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the wall webs 82 are pressed through the separating lines 97 ' allows, which expand according to FIGS. 15 and 14. . ,

With the help of the connection terminals 18 and 18 'according to the invention, electrical components IO can be reliably connected to the printed circuit of a circuit board 16, 16' in such a way that it is possible at any time to remove the electrical component 10 from the circuit board 16, 16 again without difficulty ^! to separate without damaging the electrical component 10 or the circuit board 16, 16 '. Electrical components can be easily and quickly exchanged by using the connection terminals 18 and 18 'according to the invention. Furthermore, the terminals 18 and 18 'according to the invention can be manufactured and used relatively inexpensively due to their one-piece construction.

The terminals 18 and 18 'according to the invention are preferably connected in chain form, so that the production and handling of a larger number Terminals 18 and 18 'is made possible with little expenditure of time. The interconnected terminals can, according to FIG. 6, form the shape of a chain 50, which in this case consists of terminals 18. When the terminals 18 are made in chain form, a connecting strip 52 is retained, which is connected to the end 30 of each terminal 18, so that the terminals 18 are a unit form.

Referring to Figure 6, the connection is strip with the end 30 of each terminal 18 opposite the parting line 32, which extends over the entire length of the terminal 18, connected because the terminals 18 and the

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Connection strips 52 are stamped from a single, flat metal strip. After punching out, the terminals are inserted into the Pig. 6 shown Rolled shape while remaining connected to the strip 52.

Just as the terminals 18 and 18 'can be quickly established in the association of a chain, they can in the association of this chain at the same time in complementary holes 54 of the same distance in a Insert board 56 and then with the help of a wave soldering technique with the printed conductors on the underside 57 according to FIG. 7 of the circuit board 56.

When the terminals 18 are fastened in the circuit board 56, they are separated from the strip 52 as shown in FIG. With the aid of a pair of movable blades 50 and 60, the strip 52 is removed from the ends 30 of the connecting terminals 18 cut off. The cutting edges 58 and 60 are arranged like scissors to one another and leave move towards each other in the direction of the arrows so that the metal strip cut through as shown will.

8 to 10 show the individual steps of a quick, easy method of assembling individual terminals 18, 18 'separated by a chain 50, for the Case that the simultaneous assembly of several terminals 18, 18! is not desirable.

According to FIG. 8, a chain 50 of terminals 18 has been produced as described above. The chain 50 moves in the direction of arrow 62. The terminals 18 are sequentially directly over a first end 61 of a funnel-shaped guide tube 64 positio-

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and according to FIG. 9 with the aid of a pair of cutting edges 66 and 681 similar to the pair of blades 58 and 60, one after the other separated from the common connecting strips -52. After a terminal 18 on the described Once separated from the strip 52, it falls under the influence of gravity into the end 61 of tube 64.

The tube 64 is elongated according to FIG. 10 and its opposite End 65 is with a pneumatic terminal block assembler 67 known type connected. The mounting device 67 is with compressed air operated, which is supplied via a Dr.uekluft line 69 from a compressed air system (not shown). The mounting device 67 is positioned over a hole 70 in a circuit board 72. It then becomes an actuation switch 74 set to ON so that a compressed air pulse automatically acts in the assembly device 67, in order to convey a connection terminal 18 according to the invention into the hole 70. This process is repeated several times, before each repetition, the assembly device 67 and the circuit board 72 from hole to hole relative to one another be moved. After all the terminals 18 required for a specific circuit in the circuit board 72, their ends 76 can be soldered to printed conductors 78 ′ on the underside 80 of the circuit board 72 will.

This assembly method allows terminals 18 to be assembled in circuit boards 72 in a short time. With this process, which can be completely automated, the production speed of Boards with printed circuits ο «like. can be increased using terminals according to the invention.

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ORIGiNAl INSPECTED

Claims (12)

Expectations 1. Socket for connecting a wire to the conductor of a circuit, in particular printed on a circuit board, which the socket can be inserted by inserting it into an opening penetrating the circuit board and the conductor, characterized in that the socket (18, 18) consists essentially of a elongated sleeve (19, 19 ) enclosing an insertion track (27, 27 ') with a front section (20, 20 ·, 76) and a P rear section (30, 30 '), of which the the latter carries a spring element (36, 82) that narrows the slide-in path and at its free end (29, 29 ·) for Receiving the wire (12, 12 ') which can be pushed in until it engages with the spring element is open, and from those of the front portion (20, 20 ', 76) of the sleeve (19, 19') for establishing the connection between the Conductor (14, 14 ·, 78) and the wire (12, 12 ·) into the opening (22, 54, 70) so far that the rear section (30, 30) from the plate (16, 16 ', 56, 72) protrudes outwards. 2. Bushing according to claim 1, characterized in that the sleeve (19, 19 ') consists of spring metal, has a substantially cylindrical shape and has a normally open longitudinal slot (32) which allows the bushing (18, 18 ·) to be radially compressible allows their introduction into the opening (22, 54, 70) so that a friction fit is created. 3. Socket according to claim 1 or 2, characterized in that the front portion (20, 20 ″) of the sleeve in a rounded tip (26, 26 ') ends, 009836/1729 the insertion of the front section (20, 20 ', -6) into the opening 22,54,70) relieved? and that the rear portion (30.30 x) is larger in diameter than the front section and the opening, so that at the junction between the front section (20.20 ·, 76) and the rear section (30.30 ·) one Shoulder (34) forms which prevents the sleeve from penetrating too deeply into the opening. 4. ·. Socket according to one of the preceding claims, characterized in that the spring element (36, 82) consists of a tongue contact (36) protruding into the interior of the sleeve and knocked out of the sleeve body. 5. Socket according to one of the preceding claims, characterized characterized in that the wall of the front section (30) is pressed in relative to the spring element (36) (at 38) is 6. Socket according to one of the preceding claims, characterized characterized in that as a stop for the inserted into the sleeve wire (12) in the interior of the Sleeve protruding projection (44) is provided. 7. · Socket according to one of the claims Ibis 3 _? characterized in that the spring element (36, 82) consists essentially of several inwardly curved wall sections C82) « 8. Socket according to claim 7, characterized in that that the sleeve carries a plurality of slots (97 ') between the inwardly curved wall sections (82), and that the inwardly curved wall sections (82) initially touch each other, so that one largely closed wall is created. 009836/1729 9. Socket according to claim 8, characterized in that the slots (97 ·) before the bending of the wall sections (82) are broad in the middle and narrower towards their ends. 10. Socket according to one of the preceding claims, characterized in that it is an integral part an elongated metal web (52) is the. several other sockets of the same type in parallel and at a distance to each other. 11. A method for inserting bushings according to claim IO in a board, characterized in that the sockets attached to the metal web essentially at the same time inserted into openings (54) provided for this purpose in the board (56) and then from the connecting web (52) are separated. 12. The method for inserting sockets according to claim IO in a board, characterized in that the Bushings are separated from the web (52) and fall into an insert jig (67), with the help of which they are in an opening (70) in the board (72) can be used. 009836/1729