GB1564928A - Edge connector plugs - Google Patents
Edge connector plugs Download PDFInfo
- Publication number
- GB1564928A GB1564928A GB3085676A GB3085676A GB1564928A GB 1564928 A GB1564928 A GB 1564928A GB 3085676 A GB3085676 A GB 3085676A GB 3085676 A GB3085676 A GB 3085676A GB 1564928 A GB1564928 A GB 1564928A
- Authority
- GB
- United Kingdom
- Prior art keywords
- contact member
- housing
- blade
- open end
- printed circuit
- 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.)
- Expired
Links
- 238000005452 bending Methods 0.000 claims description 15
- 238000003780 insertion Methods 0.000 claims description 5
- 230000037431 insertion Effects 0.000 claims description 5
- 210000005069 ears Anatomy 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 4
- 239000011810 insulating material Substances 0.000 claims description 4
- 230000000717 retained effect Effects 0.000 claims description 2
- 238000005476 soldering Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000003082 abrasive agent Substances 0.000 description 1
- 239000012777 electrically insulating material Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
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
- H01R12/70—Coupling devices
- H01R12/71—Coupling devices for rigid printing circuits or like structures
- H01R12/72—Coupling devices for rigid printing circuits or like structures coupling with the edge of the rigid printed circuits or like structures
- H01R12/721—Coupling devices for rigid printing circuits or like structures coupling with the edge of the rigid printed circuits or like structures cooperating directly with the edge of the rigid printed circuits
Landscapes
- Coupling Device And Connection With Printed Circuit (AREA)
Description
(54) IMPROVEMENTS RELATING TO EDGE CONNECTOR PLUGS
(71) We, FERRANTI LIMITED, a British
Company, of Hollinwood, Lancashire,
England, do hereby declare the invention, for which we pray that a patent may be granted to us, and the method by which it is to be performed, to be particularly described in and by the following statement:- This invention relates to edge connector plugs of the type used to interconnect a printed circuit board and an edge connector socket.
The usual method of making electrical connections to a printed circuit board involves forming contacts on an edge of the board, and inserting the edge into an edge connector socket. Several problems arise when this is done. The contacts on the edge of the board require a surface which is mechanically strong and which will not tarnish to cause bad contacts, and electroplated gold is frequently used. This requires to be deposited by a separate process, and has to be protected during operations intended to solder components to the board.
An additional problem arises from the fact that many boards are now made from a base material reinforced with woven glass fibre.
This is a very abrasive material, and may easily wear through the contacts of a normal edge connector.
To overcome these problems, it is known to use an edge connector plug between the board and the socket. Such a plug comprises a moulded body of insulating material having one side shaped like an edge connector socket the other side formed into a blade, like the edge of a printed circuit board.
Resilient conductive contact members pass through the body from the blade, where they lie on each side of the blade and, with the blade, may be plugged into a socket, to the other side of the body where they may make contact with a printed circuit board. The contact members are usually soldered to the circuit board, thus obviating the need for contact areas of any special material. The blade of the plug is flexible, and bending of it results also in bending of the contact members. This may stress the contact members beyond their elastic limit and cause permanent deformation which could in turn damage the socket.
It is an object of the invention to provide an edge connector plug in which the risk of permanent deformation of the contact members is substantially reduced.
According to the present invention there is provided an edge connector plug comprising an insulating body having a housing with an open end for receiving an edge of a printed circuit board, a blade of insulating material integral with the housing and extending from the other end thereof for insertion into an edge-connector socket, and also extending internally of the housing towards the open end thereof, and a plurality of conductive contact members extending along the blade through the housing and up to and beyond the open end of the housing, each contact member and the body being so shaped that the contact member is pivotally supported for bending at the point where it passes into the housing and is also supported at a support point on the extension of the blade towards the open end of the housing.
The invention will now be described with reference to the accompanying drawings, in which: Figure 1 is a drawing illustrating the use of an edge connector plug;
Figure 2 illustrates a known type of plug;
Figure 3 shows the unstressed shape of a contact member of the plug of Figure 2;
Figure 4 illustrates a first embodiment according to the invention;
Figure 5 shows the unstressed shape of a contact member of the plug of Figure 4; and
Figure 6 illustrates a second embodiment according to the invention.
Referring now to Figure 1, the edge connector plug comprises a body 10 of electrically insulating material. Basically the body is in two parts formed integral with one another. An open-ended housing 11 is shaped in a similar manner to a normal edge-connector socket so that it will receive the edge of a printed circuit board 12.
Extending from the other end of the housing
11 is the second part of the body, a thin blade
13 of similar shape and dimensions to the printed circuit board itself, and which also extends internally of the housing towards the open end thereof.
A number of electrical contact members 14, of which only two are shown, lie on opposite sides of the blade and extend from the blade of the body 10 through the housing 11 and into contact with the printed circuit board, to which they are secured by soldering.
The plug is used with a standard edgeconnector socket 15 into which the blade 13 of the plug is inserted in place of a printed circuit board.
Figure 2 shows part of the plug of Figure 1 in more detail, together with a view of the relaxed contact member at Figure 3. The same reference numbers have been used as in
Figure 1. As shown in Figure 2 it is usual to recess the contact members 14 into the surface of the blade 13 to make it easier to insert the blade into an edge-connector socket. The contact member 14 is held in its stressed condition by the clamping action of the inner part 16 of the housing 11. The contact member is also supported at the open end of the housing 11 to provide spring pressure at the end of the contact member which touches the printed circuit board 12, so that it is pressed into contact with the printed circuit board at the point where it will be soldered to the board.
The clamping action referred to above gives rises to the problem of deformation of the contact member referred to above. Any bending of the blade 13 causes the contact member 14 to bend also, and all the bending stress must be absorbed by that length of the contact member between the free end of the blade 13 and the point at which the contact member passes into the body, i.e., in the length of the blade. It is possible for the blade itself to be bent elastically to an extent which causes permarient deformation of the much thinner contact member.
Figure 4 illustrates an embodiment of the invention which reduces the risk of permanent deformation. As shown by the shape of an unstressed contact member at Figure 5, an extra bend 17 is formed at the point where the contact member touches the inner part
18 of the housing 11. The inner part 18 of the housing is itself shapes so that it acts as a pivot rather than a clamp, and the double bend 17 ensures that the contact member mains clear of the housing up to a support joint 19 between the point 18 and the open end of the housing 11.
he effect of this shape is that any bending of the blade 13 causes the contact member 14 between the free end of the blade 13 and the support point 19 to bend also. This much greater length of contact member is more able to absorb the bending stress without permanent deformation, and hence such permanent deformation is less likely to occur.
It will be seen from the above description that the desired result is achieved so long as the contact member 14 is not clamped where it passes through the body into the housing, but is free to pivot. Figure 6 illustrates an alternative embodiment in which the same effect is produced without the need for forming the bend 17 in the contact member. In the arrangement of Figure 6 the blade 13 is cut away so that the contact member is clear of it. The support 19 is formed by a pair of ears 20 on the contact member which are bent over to form the support. Here again a considerable length of the contact member is available to absorb any bending stress imposed upon it.
As an alternative to the ears 20 formed on the contact member, the support 19 may be formed by a projecting rib or stud formed on the blade 13.
The contact member may be formed with a barb such as that shown at 21 in Figure 4 by which the contact member may be retained in position within the housing 11.
The contact member 14 need not touch the housing adjacent to its open end, since repeated insertion of the board 12 will not occur and hence a steady spring pressure between the contact member and the board is unnecessary.
WHAT WE CLAIM IS:
1. An edge connector plug comprising an insulating body having a housing with an open end for receiving an edge of a printed circuit board, a blade of insulating material integral with the housing and extending from the other end thereof for insertion into an edge-connector socket, and also extending internally of the housing towards the open end thereof, and a plurality of conductive contact members extending along the blade through the housing and up to and beyond the open end of the housing, each contact member and the body being so shaped that the contact member is pivotally supported for bending at the point where it passes into the housing and is also supported at a support point on the extension of the blade towards the open end of the housing.
2. A connector as claimed in claim 1 in which said support point is formed by a curved portion of each contact member which engages the extended blade surface.
3. A connector as claimed in claim 1 in which said support point is formed by at least one projection extending from each contact member to engage the extended blade surface.
**WARNING** end of DESC field may overlap start of CLMS **.
Claims (5)
- **WARNING** start of CLMS field may overlap end of DESC **.another. An open-ended housing 11 is shaped in a similar manner to a normal edge-connector socket so that it will receive the edge of a printed circuit board 12.Extending from the other end of the housing11 is the second part of the body, a thin blade13 of similar shape and dimensions to the printed circuit board itself, and which also extends internally of the housing towards the open end thereof.A number of electrical contact members 14, of which only two are shown, lie on opposite sides of the blade and extend from the blade of the body 10 through the housing 11 and into contact with the printed circuit board, to which they are secured by soldering.The plug is used with a standard edgeconnector socket 15 into which the blade 13 of the plug is inserted in place of a printed circuit board.Figure 2 shows part of the plug of Figure 1 in more detail, together with a view of the relaxed contact member at Figure 3. The same reference numbers have been used as in Figure 1. As shown in Figure 2 it is usual to recess the contact members 14 into the surface of the blade 13 to make it easier to insert the blade into an edge-connector socket. The contact member 14 is held in its stressed condition by the clamping action of the inner part 16 of the housing 11. The contact member is also supported at the open end of the housing 11 to provide spring pressure at the end of the contact member which touches the printed circuit board 12, so that it is pressed into contact with the printed circuit board at the point where it will be soldered to the board.The clamping action referred to above gives rises to the problem of deformation of the contact member referred to above. Any bending of the blade 13 causes the contact member 14 to bend also, and all the bending stress must be absorbed by that length of the contact member between the free end of the blade 13 and the point at which the contact member passes into the body, i.e., in the length of the blade. It is possible for the blade itself to be bent elastically to an extent which causes permarient deformation of the much thinner contact member.Figure 4 illustrates an embodiment of the invention which reduces the risk of permanent deformation. As shown by the shape of an unstressed contact member at Figure 5, an extra bend 17 is formed at the point where the contact member touches the inner part18 of the housing 11. The inner part 18 of the housing is itself shapes so that it acts as a pivot rather than a clamp, and the double bend 17 ensures that the contact member mains clear of the housing up to a support joint 19 between the point 18 and the open end of the housing 11.he effect of this shape is that any bending of the blade 13 causes the contact member 14 between the free end of the blade 13 and the support point 19 to bend also. This much greater length of contact member is more able to absorb the bending stress without permanent deformation, and hence such permanent deformation is less likely to occur.It will be seen from the above description that the desired result is achieved so long as the contact member 14 is not clamped where it passes through the body into the housing, but is free to pivot. Figure 6 illustrates an alternative embodiment in which the same effect is produced without the need for forming the bend 17 in the contact member. In the arrangement of Figure 6 the blade 13 is cut away so that the contact member is clear of it. The support 19 is formed by a pair of ears 20 on the contact member which are bent over to form the support. Here again a considerable length of the contact member is available to absorb any bending stress imposed upon it.As an alternative to the ears 20 formed on the contact member, the support 19 may be formed by a projecting rib or stud formed on the blade 13.The contact member may be formed with a barb such as that shown at 21 in Figure 4 by which the contact member may be retained in position within the housing 11.The contact member 14 need not touch the housing adjacent to its open end, since repeated insertion of the board 12 will not occur and hence a steady spring pressure between the contact member and the board is unnecessary.WHAT WE CLAIM IS: 1. An edge connector plug comprising an insulating body having a housing with an open end for receiving an edge of a printed circuit board, a blade of insulating material integral with the housing and extending from the other end thereof for insertion into an edge-connector socket, and also extending internally of the housing towards the open end thereof, and a plurality of conductive contact members extending along the blade through the housing and up to and beyond the open end of the housing, each contact member and the body being so shaped that the contact member is pivotally supported for bending at the point where it passes into the housing and is also supported at a support point on the extension of the blade towards the open end of the housing.
- 2. A connector as claimed in claim 1 in which said support point is formed by a curved portion of each contact member which engages the extended blade surface.
- 3. A connector as claimed in claim 1 in which said support point is formed by at least one projection extending from each contact member to engage the extended blade surface.
- 4. A connector as claimed in any one ofclaims 1 to 3 in which each contact member carries a projection operable to retain the contact member in position in the plug.
- 5. An edge connector plug substantially as herein described with reference to Figures 4, 5 and 6 of the accompanying drawings.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3085676A GB1564928A (en) | 1976-07-23 | 1976-07-23 | Edge connector plugs |
| FR7722069A FR2359565A1 (en) | 1976-07-23 | 1977-07-19 | BORDER CONNECTION SHEET, ESPECIALLY FOR A PRINTED CIRCUIT BOARD |
| DE19772732487 DE2732487A1 (en) | 1976-07-23 | 1977-07-19 | CONNECTING PLUG |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3085676A GB1564928A (en) | 1976-07-23 | 1976-07-23 | Edge connector plugs |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1564928A true GB1564928A (en) | 1980-04-16 |
Family
ID=10314208
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3085676A Expired GB1564928A (en) | 1976-07-23 | 1976-07-23 | Edge connector plugs |
Country Status (3)
| Country | Link |
|---|---|
| DE (1) | DE2732487A1 (en) |
| FR (1) | FR2359565A1 (en) |
| GB (1) | GB1564928A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5960869A (en) * | 1982-08-25 | 1984-04-06 | エルフアブ・コ−パレイシヤン | Mutual connection finger piece assembly, electric connector and method of producing same |
| JPS5967960U (en) * | 1982-10-26 | 1984-05-08 | 田中 清夫 | Plug part of printed circuit board |
| JPS6039585U (en) * | 1983-08-26 | 1985-03-19 | 和泉電気株式会社 | Connecting part of printed circuit board |
| JPS6083269U (en) * | 1983-11-15 | 1985-06-08 | 田中 清夫 | Plug part of printed circuit board |
| EP1113533A3 (en) * | 1999-12-28 | 2004-12-01 | J.S.T. Mfg. Co., Ltd. | Cap and low insertion force connector for printed circuit board |
| US6890202B2 (en) | 1999-12-28 | 2005-05-10 | J.S.T. Mfg. Co., Ltd. | Connector for module |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4687267A (en) * | 1986-06-27 | 1987-08-18 | Amp Incorporated | Circuit board edge connector |
| JP3060654B2 (en) * | 1990-12-27 | 2000-07-10 | セイコーエプソン株式会社 | Liquid crystal display |
| DE4408693C2 (en) * | 1994-03-15 | 1996-10-31 | Stocko Metallwarenfab Henkels | Contacting device |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1542005A (en) * | 1966-10-28 | 1968-10-11 | Philips Nv | Multiple contact plug |
| FR2060282B1 (en) * | 1969-09-26 | 1973-03-16 | Francelco Sa | |
| FR2137014B1 (en) * | 1971-05-11 | 1973-05-11 | Mars Alcatel | |
| FR2239839A1 (en) * | 1973-07-31 | 1975-02-28 | Chauchat Jean | Male connector block for PCB has two forms - one with continuous contact strip with orthogonal pin, and other with two strips with spring arms |
-
1976
- 1976-07-23 GB GB3085676A patent/GB1564928A/en not_active Expired
-
1977
- 1977-07-19 FR FR7722069A patent/FR2359565A1/en not_active Withdrawn
- 1977-07-19 DE DE19772732487 patent/DE2732487A1/en not_active Withdrawn
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5960869A (en) * | 1982-08-25 | 1984-04-06 | エルフアブ・コ−パレイシヤン | Mutual connection finger piece assembly, electric connector and method of producing same |
| JPS5967960U (en) * | 1982-10-26 | 1984-05-08 | 田中 清夫 | Plug part of printed circuit board |
| JPS6039585U (en) * | 1983-08-26 | 1985-03-19 | 和泉電気株式会社 | Connecting part of printed circuit board |
| JPS6083269U (en) * | 1983-11-15 | 1985-06-08 | 田中 清夫 | Plug part of printed circuit board |
| EP1113533A3 (en) * | 1999-12-28 | 2004-12-01 | J.S.T. Mfg. Co., Ltd. | Cap and low insertion force connector for printed circuit board |
| US6890202B2 (en) | 1999-12-28 | 2005-05-10 | J.S.T. Mfg. Co., Ltd. | Connector for module |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2359565A1 (en) | 1978-02-17 |
| DE2732487A1 (en) | 1978-01-26 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |