CA2213604A1 - Deformable pin connector for multiple pc boards - Google Patents

Deformable pin connector for multiple pc boards

Info

Publication number
CA2213604A1
CA2213604A1 CA002213604A CA2213604A CA2213604A1 CA 2213604 A1 CA2213604 A1 CA 2213604A1 CA 002213604 A CA002213604 A CA 002213604A CA 2213604 A CA2213604 A CA 2213604A CA 2213604 A1 CA2213604 A1 CA 2213604A1
Authority
CA
Canada
Prior art keywords
head
pcb
pin
holes
deformable
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
CA002213604A
Other languages
French (fr)
Inventor
Ian Archer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CTS Corp
Original Assignee
CTS Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by CTS Corp filed Critical CTS Corp
Publication of CA2213604A1 publication Critical patent/CA2213604A1/en
Abandoned legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R12/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, specially adapted for printed circuits, e.g. printed circuit boards [PCB], flat or ribbon cables, or like generally planar structures, e.g. terminal strips, terminal blocks; Coupling devices specially adapted for printed circuits, flat or ribbon cables, or like generally planar structures; Terminals specially adapted for contact with, or insertion into, printed circuits, flat or ribbon cables, or like generally planar structures
    • H01R12/50—Fixed connections
    • H01R12/51—Fixed connections for rigid printed circuits or like structures
    • H01R12/55—Fixed connections for rigid printed circuits or like structures characterised by the terminals
    • H01R12/58—Fixed connections for rigid printed circuits or like structures characterised by the terminals terminals for insertion into holes
    • H01R12/585—Terminals having a press fit or a compliant portion and a shank passing through a hole in the printed circuit board
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R12/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, specially adapted for printed circuits, e.g. printed circuit boards [PCB], flat or ribbon cables, or like generally planar structures, e.g. terminal strips, terminal blocks; Coupling devices specially adapted for printed circuits, flat or ribbon cables, or like generally planar structures; Terminals specially adapted for contact with, or insertion into, printed circuits, flat or ribbon cables, or like generally planar structures
    • H01R12/50—Fixed connections
    • H01R12/51—Fixed connections for rigid printed circuits or like structures
    • H01R12/52—Fixed connections for rigid printed circuits or like structures connecting to other rigid printed circuits or like structures
    • H01R12/523—Fixed connections for rigid printed circuits or like structures connecting to other rigid printed circuits or like structures by an interconnection through aligned holes in the boards or multilayer board
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00—Apparatus or processes for manufacturing printed circuits
    • H05K3/36—Assembling printed circuits with other printed circuits
    • H05K3/368—Assembling printed circuits with other printed circuits parallel to each other
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/10—Details of components or other objects attached to or integrated in a printed circuit board
    • H05K2201/10227—Other objects, e.g. metallic pieces
    • H05K2201/10295—Metallic connector elements partly mounted in a hole of the PCB
    • H05K2201/10303—Pin-in-hole mounted pins
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/10—Details of components or other objects attached to or integrated in a printed circuit board
    • H05K2201/10431—Details of mounted components
    • H05K2201/1059—Connections made by press-fit insertion
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/10—Details of components or other objects attached to or integrated in a printed circuit board
    • H05K2201/10613—Details of electrical connections of non-printed components, e.g. special leads
    • H05K2201/10742—Details of leads
    • H05K2201/1075—Shape details
    • H05K2201/10856—Divided leads, e.g. by slot in length direction of lead, or by branching of the lead
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00—Apparatus or processes for manufacturing printed circuits
    • H05K3/30—Assembling printed circuits with electric components, e.g. with resistor
    • H05K3/306—Lead-in-hole components, e.g. affixing or retention before soldering, spacing means
    • H05K3/308—Adaptations of leads

Abstract

A press-fit or compliant section or deformable pin electrical connector. The connector is designed to be inserted into several plated through holes in printed circuit boards. Specifically, the pin connector can electrically and mechanically connect two or more printed circuit boards (PCBs). Uniquely, it is possible to have a single pin that is both electrically and mechanically connected to two PCBs and have the pin extending through a plated through hole of a third PCB without establishing any electrical or mechanical contact with the third PCB. Additionally, the pin has at least two compliant sections for press fitting into a plated through-hole in a PCB
or the like. Each compliant section has a different size diameter. Specifically, the top compliant section is the smallest, the bottom compliant section is the largest in diameter, and the remaining compliant sections will gradually increase in size as they are located from the tip to the base of the pin.

Description

CA 022l3604 l997-08-2l CTS-1493, BACKGROUND OF THE INVENTION

1. FIELD OF THE INVENTION
This invention relates to a press-fit or compliant section or deformable pin electrical connector. More particularly, it relates to connectors for insertion into 5 plated through holes in printed circuit boards. Specifically, the invention relates to a pin connector that can electrically and mechanically connect two or more printed circuit boards (PCBs).
2. DESCRIPTION OF THE RELATED ART
Deformable pin connectors have existed for many years. They are used to shorten the assembly time and for allowing for later removal of connected items such as PCBs.
When a pin is inserted into a metal plated hole the pin will deform in shape and wedge into the plated through-hole. Thus, an electrical contact is made and a secure hold is achieved. Prior methods typically required a pin tip to be inserted into and through a hole, 15 where the pin would have to be soldered from the back side of the printed circuit board to create the electrical conta~,t and to securely hold the pin in place.
-~ Consumers have required smaller and smaller computer cases in recent years, from towers to mini-towers. As a result, PCBs and other circuit card physical arrangements have needed to become more compact. Thus, PCBs have needed to be placed very close 20 together. The situation often occurs when a mother board needs to be connected to CA 022l3604 l997-08-2l CTS-1493, several equally large daughter boards. The typical connecting method is to connect the daughter boards perpendicular to the mother board. However, this perpendicular arrangement requires a large PCB profile requiring a larger computer case.
A parallel arrangement of the daughter cards to the mother boards is known to create a smaller profile. This arrangement works like a stack of playing cards. The difficult job is to try to both electrically and physically connect all of the cards together.
There are several known methods of connecting several parallel cards. See fig. 1.
One type of connector has pins designed with a deformable portion near the base of each pin and a longer pin section extending therefrom. Thus, it is possible to connect two PCBs by having the pin inserted into the first PCB and thereby deformably fitting thereto, and the extended pin portion is inserted through the second PCB through-hole and thereafter welded to create a secure electrical fit between the two PCBs.
One major drawback of this method is that it is expensive and time consuming to weld the end of each pin to the PCB. One connector could have as many as eighty or more closely positioned pins. The soldering of these pins requires extra time, welding equipment, and solder materials. Thus, a need exists for a method of connecting several PCBs without the need for soldering.
Examples of patents related to the present invention are as follows, and each patent is herein incorporated by reference for the supporting teachings:
U.S. patent no. 5,374,204, is an electrical terminal with a compliant pin section.
U.S. patent no. 5,259,111, is a method of producing terminal connector for a base CA 022l3604 l997-08-2l CTS-1493, board. U.S. patent no. 5,230,642, is a press-fit contact. U.S. patent no.
5,106,310, is a Z-axis pin connector for stacked printed circuit board assemblies.
U.S. patent no. 4,923,414, is a compliant section for circuit board contact elements.
U.S. patent no. 4,828,514, is an electrical connector with a compliant section. U.S.
patent no. 4,728,164, is an electrical contact pin for printed circuit boards. U.S.
patent no. 4,446,505, is an electrical connector for interconnecting printed circuit boards.
The foregoing patents reflect the state of the art of which the applicant is aware and are tendered with the view toward discharging applicant's acknowledged duty of candor in disclosing inforrnation that may be pertinent in the examination of this application. It is respectfully stipulated, however, that none of these patents teach or render obvious, singly or when considered in combination, applicant's claimed invention.

SUMMARY OF THE PREFERRED EMBODIMENT

It is a feature of the invention to provide a press-fit or compliant section or deformable pin electrical connector. More particularly, it relates to connectors for i~sertion into plated through holes in printed circuit boards. Specifically, the invention relates to a pin connector that can electrically and mechanically connect two or more printed circuit boards (PCBs). Uniquely, it is possible to have a single pin that is both electrically and mechanically connected to two PCBs and has the pin extending CTS-1493, through a plated through hole of a third PCB without establishing any electrical or mechanical contact with the third PCB.
An additional feature of the invention is to provide a pin that has at least two compliant sections for press fitting into a plated through-hole in a PCB or the like. In 5 particular, each compliant section has a different size diameter. Specifically, the top compliant section is the smallest, the bottom compliant section is the largest in diameter, and the remaining compliant sections will gradually increase in size as they are located from the tip to the base of the pin.
A further feature of the invention is to provide a strip of multi-compliant pins 10 mounted upon a linear strip of material for easy removal of each pin form the strip.

The invention resides not in any one of these features per se, but rather in the particular combination of all of them herein disclosed and claimed and it is distinguished from the prior art in this combination of all of its structures for the functions specified.
There has thus been outlined, rather broadly, the more important features of the invention so the detailed description thereof that follows may be better understood, and so the present contribution to the art may be better appreciated. There are, of course, additional features of the invention that will be described hereinafter and which will form the subject matter of the claims appended hereto. Those skilled in the art will appreciate 20 that the conce,clion, upon which this disclosure is based, may readily be utilized as a basis for the designing of other structures, methods and systems for carrying out the several CA 022l3604 l997-08-2l CTS-1493, purposes of the present invention. I t is important, therefore, that the claims are regarded as including such equivalent constn~ctions insofar as they do not depart from the spirit and scope of the present invention.
Further, the purpose of the abstract is to enable the U.S. Patent and Trademark Office and the public generally, and especially the scientists, engineers and practitioners in the art who are not familiar with patent or legal terms or phraseology, to determine quickly from a cursory inspection the nature and essence of the technical disclosure of the application. The abstract is neither intended to define the invention of the application, which is measured by the claims, neither is it intended to be limiting as to the scope of the invention in any way.
Other features of the present invention will become more clear from the following detailed description of the invention, taken with the accompanying drawings and claims, or may be learned by the practice of the invention.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a cross sectional view of a related art embodiment.
- FIG. 2 is a cross sectional view of a first embodiment of the connector pin.
FIG. 3 is a cross sectional view of another embodiment of the connector pin.
FIG. 4 is a top view of the connector pin from FIG. 2 attached to a strip containing several other connector pins.

CA 022l3604 l997-08-2l CTS-1493, It is noted that the drawings of the invention are not to scale. The drawings are merely schematic representations, not intended to portray specific parameters of the invention. The drawings are intended to depict only typical embodiments of the invention, 5 and therefore should not be considered as limiting the scope of the invention. The invention will be described with additional specificity and detail by the accompanying drawings.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

The present invention provides a method for attaching several parallel oriented printed circuit boards (PCBs) together as shown in Figs. 2 and 3. Referring to Fig. 2, there is a connector pin 10 that has a first and second deformable or compliant portion 12 and 14. The first compliant portion 12 is smaller than the second compliant portion 14.
15 There is a neck 18 that connects the first and second compliant portions. Each compliant portion 12 and 14 has a hole 19 and 21 respectively located therein. There are two printed circuit boards (PCBs) 16 and 20 each having a through hole 22 and 24 piated with a~ electrical conductive material 26.

20In operation, the first deformable portion 12 is inserted into and through a larger dimensioned through-hole 24 of one PCB 20 without deforming the plated material 26 or CA 022l3604 l997-08-2l CTS-1493, deforming the first compliant portion 12. As pin 10 continues to be inserted into the first circuit board 20, the neck portion 18 will extend into and through the larger through-hole 24 without any deformation to either the pin or plated material 26. The small compliant portion 12 will eventually reach the smaller dimensioned plated through hole 22. The 5 compliant portions 12 and 14 are sized to be slightly larger than the respective plated through-holes 22 and 24 located in the respective PCBs 16 and 20. As pin 10 is inserted to its full extent both compliant portions 12 and 14 will begin to collapse the respective holes 19 and 21 as a result from contacting the smaller diameter plated through-holes 22 and 24. Upon reaching the full extent of insertion compliant sections 12 and 14 have been 10 both physically deformably locked into the electrical conductive material 26 and electrically coupled to the plated through-holes.

second method and design for attaching several PCBs. In particular, there are three connector pins 30, 32, and 34 and four PCBs 36, 40, 42, and 44. The first pin 30 is 15 mechanically and electrically coupled to the first 36 and third 42 PCBs, and the second pin 32 is mechanically and electrically coupled to the first 36 and second 40 PCBs. The third pin 34 is mechanically and electrically coupled to the first 36, second 4~1 and fourth 44 P~Bs, and not to the third 42 PCB.
In reference to Fig. 4, there is illustrated a set of pins 10 mounted upon a strip 50 20 having grooves 52 along the attachment portion 54 for providing quick easy breaking or removing of the pin 10 from the strip 50.

CA 022l3604 l997-08-2l CTS-1493, Remarks About the Preferred Embodiment One of ordinary skill in the art of press-fit pin connectors for printed circuit boards 5 will reallze many advantages from using the preferred embodiment. For example, there is an elimination of the prior welding process to attach the last PCB to the pin as illustrated in Fig. 1. The use of thin metal or conductive material in fabricating the pin and strip makes it easy to both remove the pins from the strip and press-fit the pins into PCB. The fact that the pins can be designed to interconnect several PCBs in different arrangements 10 will allow for greater interconnectability. The fact that several PCBs can be located planer to each other allows for lower profiles or height needed to interconnect several PCBs.

Variations of the Prefenred Embodiment Although the illustrated embodiments discuss connecting the pins 10 to PCBs one skilled in the art will realize that the preferred embodiment would work to connect any circuity needing an interconnection pin, such as ceramic based circuits. Additionally, the pFeferred embodiment discusses the use of rounded compliant section 12 and 14, where in fact any shape would work, like oval or a three-dimensional shape. It is contemplated 20 to design the holes 19 and 21 differently and still be within the scope of the invention. For example, it is equally likely that the compliant sections not have any hole therein, but CTS-1493, would have a thinning of the material for example. In fact any arrangement that will provide for press-fit connection of the pin to a plated through-hole is contemplated.

While the invention has been taught with specific reference to these embodiments, 5 someone skilled in the art will recognize that changes can be made in form and detail without departing from the spirit and the scope of the invention. The described embodiments are to be considered in all respects only as illustrative and not restrictive.
The scope of the invention is, therefore, indicated by the appended claims rather than by the foregoing description. All changes that come within the meaning and range of 10 equivalency of the claims are to be embraced within their scope.

Claims (8)

1. A connector pin, comprising a) a shaft having a first and second end;
b) a first and second deformable portion mounted on the shaft;
c) the first portion having a smaller width than the second portion;
d) the first portion located near the first end; and e) the second portion located near the second end.
2. A combination connector pin and printed circuit board (PCB) assembly, comprising:
a) a first and second PCB, the first PCB having smaller holes than the second PCB, where the holes are designed to presser fit deformable connector pin heads;
b) a double headed deformable connector pin, having:
b1 ) a shaft having a first and second end;
b2) a first and second head;
b3) the first head having a smaller width than the second head;
b4) the first head located near the first end; and b5) the second head located near the second end; and c) the first head is deformably held within the first holes and the second head is deformably held within the second holes.
3. A combination connector pin and printed circuit board (PCB) assembly, comprising:
a) a first, second, and third PCB, the first PCB having holes smaller than the second and third PCB and the second PCB having holes smaller than the third PCB, where the holes are designed to presser fit deformable connector pin heads;
b) a double headed deformable connector pin, having:
b1) a shaft having a first and second end;
b2) a first and second head;
b3) the first head having a smaller width than the second head;
b4) the first head located near the first end; and b5) the second head located near the second end; and c) the first head is deformably held within the first holes, the second head is deformably held within the second holes, and the shaft extends through the third PCB, where the third PCB is located between the first and second PCB.
4. A collection of press-fit electrical connector pins, comprising:
a) at least two deformable connector pins, each pin having:
a1) a shaft having a first and second end;
a2) a first and second head;
a3) the first head having a smaller width than the second head;
a4) the first head located near the first end; and a5) the second head located near the second end; and b) a connecting strip, having the first deformable connector pin releasably attached to a first side of the connecting strip and the second deformable connector pin releasably attached to a second side opposite the first side of the connecting strip.
5. The collection of press-fit electrical connector pins of claim 4, wherein the first and second heads having portions therein defining a hole in each head.
6. The combination connector pin and printed circuit board (PCB) assembly of claim 3, wherein the first and second heads having portions therein defining a hole in each head.
7. The combination connector pin and printed circuit board (PCB) assembly of claim 2, wherein the first and second heads having portions therein defining a hole in each head.
8. The connector pin of claim 1, wherein the first and second deformable portion having portions therein defining a hole in each deformable portion.
CA002213604A 1996-08-23 1997-08-21 Deformable pin connector for multiple pc boards Abandoned CA2213604A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/702,348 1996-08-23
US08/702,348 US5761050A (en) 1996-08-23 1996-08-23 Deformable pin connector for multiple PC boards

Publications (1)

Publication Number Publication Date
CA2213604A1 true CA2213604A1 (en) 1998-02-23

Family

ID=24820861

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002213604A Abandoned CA2213604A1 (en) 1996-08-23 1997-08-21 Deformable pin connector for multiple pc boards

Country Status (4)

Country Link
US (1) US5761050A (en)
EP (1) EP0825680B1 (en)
CA (1) CA2213604A1 (en)
DE (1) DE69704185T2 (en)

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DE69704185T2 (en) 2001-10-18
EP0825680A3 (en) 1999-01-27
EP0825680B1 (en) 2001-03-07
US5761050A (en) 1998-06-02
DE69704185D1 (en) 2001-04-12
EP0825680A2 (en) 1998-02-25

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