GB2103435A - Electrical connector for printed circuit boards - Google Patents

Electrical connector for printed circuit boards Download PDF

Info

Publication number
GB2103435A
GB2103435A GB08217567A GB8217567A GB2103435A GB 2103435 A GB2103435 A GB 2103435A GB 08217567 A GB08217567 A GB 08217567A GB 8217567 A GB8217567 A GB 8217567A GB 2103435 A GB2103435 A GB 2103435A
Authority
GB
United Kingdom
Prior art keywords
post
contact
printed circuit
housing
sharp edge
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.)
Withdrawn
Application number
GB08217567A
Inventor
Wilred Trevor Britch
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.)
Balfour Beatty PLC
FCI USA LLC
Original Assignee
BICC PLC
Burndy 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 BICC PLC, Burndy Corp filed Critical BICC PLC
Priority to GB08217567A priority Critical patent/GB2103435A/en
Publication of GB2103435A publication Critical patent/GB2103435A/en
Withdrawn legal-status Critical Current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
    • H01R12/52—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
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/02—Soldered or welded connections
    • 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
    • H05K3/32—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits
    • H05K3/34—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits by soldering
    • H05K3/3405—Edge mounted components, e.g. terminals
    • 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
    • H05K3/366—Assembling printed circuits with other printed circuits substantially perpendicularly to each other

Landscapes

  • Coupling Device And Connection With Printed Circuit (AREA)

Abstract

An electrical connector for interconnecting printed circuit boards comprises a housing of electrically insulated material (2) and, secured in the housing, at least one elongate electrical contact (3) comprising, at one end of the contact, a first post for flow soldering to a printed circuit board and, at the other end of the contact, a second post (6) having a chamfered extremity forming a substantially sharp edge (9), for contacting a solder pad on a second printed circuit board. <IMAGE>

Description

SPECIFICATION Electrical connector This invention relates to an electrical connector for inter-connecting printed circuit boards.
According to the present invention an electrical connector for inter-connecting printed circuit boards comprises a housing of electrically insulating material and, secured in the housing, at least one elongate electrical contact comprising, at one end of the contact, a first post for flow soldering to a printed circuit board and, at the other end of the contact, a second post having a chamfered extremity forming a substantially sharp edge for contacting a solder pad on a second printed circuit board.
Preferably, the second post is chamfered to form a substantially flat surface, the chamfered extremity of the second post being so folded that one of the boundary edges of the flat surface constitutes the substantially sharp edge. The chamfered extremity of the second post is preferably folded about an axis extending transversely of the substantially flat surface so that the flat surface is inclined to the longitudinal axis of the second post at an angle lying with in the range 40 to 50". Preferably the angle is 45".
Preferably, the chamfered extremity is formed by cutting away each side of the second post at an angle of approximately 45".
The sharp edge enables a good "gas-tight" contact to be made to the solder pad in the absence of noble plating of the contact.
Preferably, the or each elongate electrical contact has, between the first and second posts, an enlarged intermediate portion by which the contact is secured in the housing.
The invention is now described, by way of example, with reference to the accompanying drawings, in which: Figure 1 is a partial side and cross-sectional view of an electrical connector for inter-connecting printed circuit boards; and Figure 2 is a side and end view of the contacts used on the connector in Figure 1.
Referring to the drawings, the connector 1 comprises a housing 2 of insulating material and contacts 3. Each contact 3 comprises an enlarged intermediate portion 4, a first post 5 extending away from the intermediate portion, and a resilient second post 6 extending away from the intermediate portion in substantially the opposite direction to the first post.
The resilient second post 6 has a chamfered extremity 7 forming a substantially flat surface 8. The chamfered extremity 7 so folded that one of the boundary edges 9 of the flat surface 8 constitutes a leading substantially sharp edge. In use, the first post 5 is flow-soldered to a first printed circuit board, and the sharp edge 9 contacts a solder pad on a second printed circuit board.
The arrangement for this type of connector 1 (usu ally referred to a printed circuit board stacking connector) is as follows: Contacts 3 are manufactured and positioned in the housing 2; the contacts are secured in the housing (by softening and deforming part of the housing around the enlarged intermediate portion 4 of each contact) such that the first post 5 of each contact extends away from one surface 10 of the housing 2, and the sharp edge 9 of the second post 6 of each contact protrudes siightly from a second surface 11 of the housing, the first post 5 of each contact 3 is flow-soldered to a first printed circuit board (which usually carries active circuit components); and the first board is then bolted to a second printed circuit board (which usually provides all the electrical interconnections) such that the sharp edge 9 on each contact 3 makes an electrical connection with a solder pad on the second board. In this arrangement as the boards are bolted together the second post 6 of each contact 3 bends slightly under its own resilience (when the sharp edge engages a solder pad) until the second board engages the second surface 11 of the housing 2. This bending ensures a sufficient contact pressure between each sharp edge and each solder pad when the boards are bolted together. The resilience of the second post 6 also ensures the sharp edge remains in contact with the solder pad even if there is light relative movement between the boards (e.g. due to differential heating). The sharp edge 9 is usually 0.15 to 0.30 mm long.If the edge is too short it will tend to penetrate the solder pad and enter the substrate of the second board. If the edge is too long the average pressure is reduced, resulting in a loss in "gas-tightness" between the sharp edge and the solder pad.
1. An electrical connector for interconnecting printed circuit boards comprising a housing of electrically insulating material and, secured in the housing, at least one elongate electrical contact comprising, at one end of the contact, a first post for flow soldering to a printed circuit board and, at the other end of the contact, a second post having a chamfered extremity forming a substantially sharp edge for contacting a solder pad on a second printed circuit board.
2. An electrical connector as claimed in Claim 1, wherein the second post is chamfered to form a sub stantiallyflat surface, the chamfered extremity of the second post being so folded that one of the boundary edges of the flat surface constitutes the substantially sharp edge.
3. An electrical connector as claimed in Claim 2, wherein the chamfered extremity of the second post is folded about an axis transversely of the substan tially flat surface so that the flat surface is inclined to the longitudinal axis of the second post at an angle lying within the range 40 to 50".
4. An electrical connector as claimed in Claim 3, wherein the angle is 45".
5. An electrical connector as claimed in any one of the preceding Claims, wherein the second post is resilient.
This print takes account of replacement documents laterfiled to enable the application to comply with the formal requirements of the Patents Rules 1982.
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (9)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Electrical connector This invention relates to an electrical connector for inter-connecting printed circuit boards. According to the present invention an electrical connector for inter-connecting printed circuit boards comprises a housing of electrically insulating material and, secured in the housing, at least one elongate electrical contact comprising, at one end of the contact, a first post for flow soldering to a printed circuit board and, at the other end of the contact, a second post having a chamfered extremity forming a substantially sharp edge for contacting a solder pad on a second printed circuit board. Preferably, the second post is chamfered to form a substantially flat surface, the chamfered extremity of the second post being so folded that one of the boundary edges of the flat surface constitutes the substantially sharp edge. The chamfered extremity of the second post is preferably folded about an axis extending transversely of the substantially flat surface so that the flat surface is inclined to the longitudinal axis of the second post at an angle lying with in the range 40 to 50". Preferably the angle is 45". Preferably, the chamfered extremity is formed by cutting away each side of the second post at an angle of approximately 45". The sharp edge enables a good "gas-tight" contact to be made to the solder pad in the absence of noble plating of the contact. Preferably, the or each elongate electrical contact has, between the first and second posts, an enlarged intermediate portion by which the contact is secured in the housing. The invention is now described, by way of example, with reference to the accompanying drawings, in which: Figure 1 is a partial side and cross-sectional view of an electrical connector for inter-connecting printed circuit boards; and Figure 2 is a side and end view of the contacts used on the connector in Figure 1. Referring to the drawings, the connector 1 comprises a housing 2 of insulating material and contacts 3. Each contact 3 comprises an enlarged intermediate portion 4, a first post 5 extending away from the intermediate portion, and a resilient second post 6 extending away from the intermediate portion in substantially the opposite direction to the first post. The resilient second post 6 has a chamfered extremity 7 forming a substantially flat surface 8. The chamfered extremity 7 so folded that one of the boundary edges 9 of the flat surface 8 constitutes a leading substantially sharp edge. In use, the first post 5 is flow-soldered to a first printed circuit board, and the sharp edge 9 contacts a solder pad on a second printed circuit board. The arrangement for this type of connector 1 (usu ally referred to a printed circuit board stacking connector) is as follows: Contacts 3 are manufactured and positioned in the housing 2; the contacts are secured in the housing (by softening and deforming part of the housing around the enlarged intermediate portion 4 of each contact) such that the first post 5 of each contact extends away from one surface 10 of the housing 2, and the sharp edge 9 of the second post 6 of each contact protrudes siightly from a second surface 11 of the housing, the first post 5 of each contact 3 is flow-soldered to a first printed circuit board (which usually carries active circuit components); and the first board is then bolted to a second printed circuit board (which usually provides all the electrical interconnections) such that the sharp edge 9 on each contact 3 makes an electrical connection with a solder pad on the second board. In this arrangement as the boards are bolted together the second post 6 of each contact 3 bends slightly under its own resilience (when the sharp edge engages a solder pad) until the second board engages the second surface 11 of the housing 2. This bending ensures a sufficient contact pressure between each sharp edge and each solder pad when the boards are bolted together. The resilience of the second post 6 also ensures the sharp edge remains in contact with the solder pad even if there is light relative movement between the boards (e.g. due to differential heating). The sharp edge 9 is usually 0.15 to 0.30 mm long.If the edge is too short it will tend to penetrate the solder pad and enter the substrate of the second board. If the edge is too long the average pressure is reduced, resulting in a loss in "gas-tightness" between the sharp edge and the solder pad. CLAIMS
1. An electrical connector for interconnecting printed circuit boards comprising a housing of electrically insulating material and, secured in the housing, at least one elongate electrical contact comprising, at one end of the contact, a first post for flow soldering to a printed circuit board and, at the other end of the contact, a second post having a chamfered extremity forming a substantially sharp edge for contacting a solder pad on a second printed circuit board.
2. An electrical connector as claimed in Claim 1, wherein the second post is chamfered to form a sub stantiallyflat surface, the chamfered extremity of the second post being so folded that one of the boundary edges of the flat surface constitutes the substantially sharp edge.
3. An electrical connector as claimed in Claim 2, wherein the chamfered extremity of the second post is folded about an axis transversely of the substan tially flat surface so that the flat surface is inclined to the longitudinal axis of the second post at an angle lying within the range 40 to 50".
4. An electrical connector as claimed in Claim 3, wherein the angle is 45".
5. An electrical connector as claimed in any one of the preceding Claims, wherein the second post is resilient.
This print takes account of replacement documents laterfiled to enable the application to comply with the formal requirements of the Patents Rules 1982.
6. An electrical connector as claimed in any one ofthe preceding Claims, wherein the chamfered extremity is formed by cutting away each side of the second post at an angle of approximately 45".
7. An electrical connector as claimed in any one of the preceding Claims, wherein the or each elongate electrical contact has, between the first and second posts, an enlarged intermediate portion by which the contact is secured in the housing.
8. An electrical connector as hereinbefore described, with reference to, and as shown in, the accompanying drawings.
9. A method of manufacturing a contact for an electrical connector as claimed in any one of the preceding Claims.
GB08217567A 1981-06-17 1982-06-17 Electrical connector for printed circuit boards Withdrawn GB2103435A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB08217567A GB2103435A (en) 1981-06-17 1982-06-17 Electrical connector for printed circuit boards

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8118587 1981-06-17
GB08217567A GB2103435A (en) 1981-06-17 1982-06-17 Electrical connector for printed circuit boards

Publications (1)

Publication Number Publication Date
GB2103435A true GB2103435A (en) 1983-02-16

Family

ID=26279824

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08217567A Withdrawn GB2103435A (en) 1981-06-17 1982-06-17 Electrical connector for printed circuit boards

Country Status (1)

Country Link
GB (1) GB2103435A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0804059A1 (en) * 1996-04-23 1997-10-29 Nec Corporation Structure for mounting an electrical module on a board

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0804059A1 (en) * 1996-04-23 1997-10-29 Nec Corporation Structure for mounting an electrical module on a board
US5796592A (en) * 1996-04-23 1998-08-18 Nec Corporation Module mounting structure

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Legal Events

Date Code Title Description
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)