GB2094072A - Cantilever beams; electrical sockets - Google Patents
Cantilever beams; electrical sockets Download PDFInfo
- Publication number
- GB2094072A GB2094072A GB8203993A GB8203993A GB2094072A GB 2094072 A GB2094072 A GB 2094072A GB 8203993 A GB8203993 A GB 8203993A GB 8203993 A GB8203993 A GB 8203993A GB 2094072 A GB2094072 A GB 2094072A
- Authority
- GB
- United Kingdom
- Prior art keywords
- socket
- elastomer
- cantilever beam
- elastomeric material
- deflectionary
- 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- Withdrawn
Links
- 239000013536 elastomeric material Substances 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims description 4
- 230000001502 supplementing effect Effects 0.000 claims description 3
- 239000013589 supplement Substances 0.000 claims description 2
- 230000000295 complement effect Effects 0.000 claims 3
- 229920001971 elastomer Polymers 0.000 abstract description 27
- 239000000806 elastomer Substances 0.000 abstract description 25
- 229920002379 silicone rubber Polymers 0.000 description 3
- 239000007788 liquid Substances 0.000 description 2
- 239000004945 silicone rubber Substances 0.000 description 2
- 229910000679 solder Inorganic materials 0.000 description 2
- 238000005476 soldering Methods 0.000 description 2
- 239000004944 Liquid Silicone Rubber Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000012858 resilient material Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 230000000153 supplemental effect Effects 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
- H01R12/50—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
Landscapes
- Coupling Device And Connection With Printed Circuit (AREA)
- Multi-Conductor Connections (AREA)
- Connector Housings Or Holding Contact Members (AREA)
- Connecting Device With Holders (AREA)
- Non-Metallic Protective Coatings For Printed Circuits (AREA)
Abstract
The capability of a cantilever beam to store energy imparted thereto by a deflectionary force is supplemented by a layer of elastomeric material. In a particular embodiment an electrical socket (10) having a cantilever beam contact (20) is filled with an elastomer (28). A male contact (42), when inserted into the socket through the elastomer (28), deflects the beam contact (20) against the action of the elastomer (28) supporting it. <IMAGE>
Description
SPECIFICATION
Elastomeric supplement for cantilever beams
This invention relates to spring forces generated in a resilient material by a deflecting force and to means for supplementing such forces.
No art specifically relating to the use of an elastomer as a supplemental spring force in a spring socket having cantilever beams is known to applicant. U.S. Patent No. 3,877,769 does teach applying a fiscous liquid silicone rubber in the opening of a socket. After curing, the rubber provides a seal which prevents flux, molten solder or other contaminants from entering the interior of the socket. The rubber plug is confined to the facing surfaces of the spring arms.
The present invention discloses a means by which the spring force of a cantilever beam may be altered or modified. More particularly, the invention is characterized by placing an elastomer behind the beam so that spring forces are generated both in the beam and in the elastomer by a load.
An embodiment of the invention will now be described by way of example with reference to the accompanying drawings in which:
Figure 1 is a perspective view of a printed circuit board spring socket with which the present invention is illustrated;
Figure 2 shows in perspective a pair of Figure 1 sockets subsequent to being encapsulated in an elastomeric material;
Figure 3 is a cross-sectional view of a Figure 1 socket subsequent to being soldered in a hole in a printed circuit board;
Figure 4 is the same cross-sectional view as Figure 3 but with a pin or lead inserted into the socket causing a deflection in the cantilever beam and compression in the elastomer;
Figure 5 is a perspective view of another type of spring socket; and
Figure 6 shows the Figure 5 socket encapsulated in an elastomeric
Three cantilever beams 20 are formed from body 12 and the free ends 22 pushed into the inerior thereof. The upper end of the beams remain attached to the body. Three short lances 24 are also formed from the body and their free ends 26 are pushed out away therefrom.
Figure 2 shows a pair of sockets 10 which have been filled and partially encapsulated in an elastomer indicated by reference numeral 28. Preferably the elastomer is a liquid injectable silicone rubber.
The elastomer is applied to the sockets with the sockets in a mold (not shown). Where a number of sockets are receiving the elastomer in a continuous molding process, a connecting strip 30 of the elastomer joining adjacent encapsulated sockets may be provided. Such a carrier strip would provide many benefits in handling, storing, and inserting the sockets into circuit boards.
As shown in Figures 2 snd 3, the elastomer completely fills and encapsulates the upper part of the socket, with the outer jacket 32 extending down to free end 26 of lances 24. Obviously, the presence or absence of an outer jacket depends on the nature of the device receiving the elastomer. Additionally, and for the present application a number of ribs 34 (of elastomeric material) extend down below jacket 32. The ribs and outer jacket back up the elastomeric material supporting the beams. The ribs abut the walls of plated-through hole 36 in circuit board 38 (Figures 3 and 4) so that the walls can provide a firm support for the elastomeric material. Where the elastomeric material is thick enough, the thickness itself provides the support.
As seen in Figures 3 and 4, the elastomer fills the interior of socket 10 and particularly behind cantilever beams 20.
Figures 3 and 4 also show the encapsulated socket positioned and soldered in hole 36. The solder is indicated generally by reference numeral 40. The soldering and cleaning operations (not shown) have not caused degradation of the elastomer.
Figure 4 shows a pin 42 inserted into encapsulated socket 10. The pin has pierced the elastomer and further has displaced it from cantilever beams 20 at the point of contact so that an electrical path between the pin and socket is made. As the pin is driven into the socket it engages the beams and bends or deflects them outwardly. The deflection is also seen by the elastomer which is resilient as noted above. The importance of this is that beams 20 can be made thinner than if they alone had to absorb the deflection imposed by pin 42. Other parameters which can be changed include beam length, beam material and amount of beam deflection.
Other advantages flow from the present invention.
In that the elastomer does not tear when a pin or lead is inserted, it flows back together upon pin withdrawal. Accordingly, the interior of the socket and the contact between pin and beams are environmentally sealed notwithstanding the number of times the elastomer is pierced. Warpage of the circuit board from handling or thermal shock would be absorbed by the elastomer and not transmitted to the electronic device plugged into the sockets.
Figure 5 illustrates a second type of socket 44 having a pair of spring arms 46 which are attached to body 48 near lower end 50. The free ends 52 of the arms are flared out to define a bell-mouth opening 54 to the socket's interior. Downwardly from the free ends the arms converge to form a narrow opening into the socket. The body also carries a pair of spring fingers 56 which centralize and hold the socket in hole 36 during the soldering operation.
Figure 6 shows the socket after being filled and partially encapsulated by elastomer 28. As with socket 10, the elastomer encapsulates the upper part of the socket. In this case, the encapsulation both seals the opening and provides a supplementary spring to spring arms 46. Thus, as a pin (not shown) is inserted into the socket, it contacts the spring arms at the nearest point of convergences and forces them outwardiy. This compressive force is also absorbed by the elastomer as noted above.
The preferred elastomer is a liquid injectable silicone rubber having a cured durometer of about forty (40).
The present invention may be subject to many modifications and changes without departing from the spirit or essential characteristics thereof. The present embodiment should therefore be considered as illustrative and not restrictive of the scope of the invention.
Claims (4)
1.An electrical connector of the type adapted for telecopingly receiving a complementary electrical member, comprising a socket and a cantilever beam within the socket which the complementary member bears against and deflects upon being inserted into the socket, and an elastomeric material supporting the cantilever beam to supplement the capability of said beam to store energy imparted to the beam by being deflected to the complementary member.
2. A method for supplementing the capability of a cantilever beam to store energy imparted thereto by a deflectionary force, the method comprising the steps of:
a. applying a layer of resilient elastomeric material to the side of the cantilever beam opposite the side receiving the deflectionary force; and
b. supporting the layer of elastomeric material so that the deflectionary forces are absorbed by the combination cantilever beam and elastomeric material.
3. An electrical connector substantially as hereinbefore described with reference to the accompanying drawings.
4. A method of supplementing the capability of a cantilever beam to store energy imparted thereto by deflectionary force, substantially as hereinbefore described with reference to the accompanying drawings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US23733481A | 1981-02-23 | 1981-02-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB2094072A true GB2094072A (en) | 1982-09-08 |
Family
ID=22893294
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8203993A Withdrawn GB2094072A (en) | 1981-02-23 | 1982-02-11 | Cantilever beams; electrical sockets |
Country Status (8)
| Country | Link |
|---|---|
| JP (1) | JPS57154777A (en) |
| BE (1) | BE892009A (en) |
| BR (1) | BR8200447A (en) |
| DE (1) | DE3204716A1 (en) |
| FR (1) | FR2500962A1 (en) |
| GB (1) | GB2094072A (en) |
| IT (1) | IT1153433B (en) |
| NL (1) | NL8200112A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1988010014A1 (en) * | 1987-06-11 | 1988-12-15 | Motorola, Inc. | Electrical socket apparatus with temporary housing |
| US4878851A (en) * | 1987-07-27 | 1989-11-07 | Motorola, Inc. | Electrical socket apparatus with temporary housing |
| WO1998012775A1 (en) * | 1996-09-23 | 1998-03-26 | S. C. Johnson & Son, Inc. | Electrical connector with variable plug retention mechanism |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4598963A (en) * | 1982-11-05 | 1986-07-08 | Bicc Public Limited Company | Circuit board composite connector |
| JPH0247556Y2 (en) * | 1984-12-27 | 1990-12-13 | ||
| JPH0247557Y2 (en) * | 1984-12-27 | 1990-12-13 | ||
| JPS63198181U (en) * | 1987-06-09 | 1988-12-20 |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH350319A (en) * | 1956-01-26 | 1960-11-30 | Asea Ab | Electrical plug-in contact device, in particular for the interconnection of a continuous heating cable in trains |
| DE2017999A1 (en) * | 1970-04-15 | 1971-10-28 | Jörn, Raoul, Dipl.-Ing., 8990 Lindau | Spring element, in particular for the elastic mounting of engines |
| JPS55132408A (en) * | 1979-03-30 | 1980-10-15 | Shinetsu Polymer Co | Socket type connector |
-
1982
- 1982-01-13 NL NL8200112A patent/NL8200112A/en not_active Application Discontinuation
- 1982-01-26 FR FR8201161A patent/FR2500962A1/en not_active Withdrawn
- 1982-01-27 BR BR8200447A patent/BR8200447A/en unknown
- 1982-02-03 BE BE0/207222A patent/BE892009A/en not_active IP Right Cessation
- 1982-02-11 GB GB8203993A patent/GB2094072A/en not_active Withdrawn
- 1982-02-11 DE DE19823204716 patent/DE3204716A1/en not_active Withdrawn
- 1982-02-18 IT IT19722/82A patent/IT1153433B/en active
- 1982-02-22 JP JP2805082A patent/JPS57154777A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1988010014A1 (en) * | 1987-06-11 | 1988-12-15 | Motorola, Inc. | Electrical socket apparatus with temporary housing |
| US4878851A (en) * | 1987-07-27 | 1989-11-07 | Motorola, Inc. | Electrical socket apparatus with temporary housing |
| WO1998012775A1 (en) * | 1996-09-23 | 1998-03-26 | S. C. Johnson & Son, Inc. | Electrical connector with variable plug retention mechanism |
Also Published As
| Publication number | Publication date |
|---|---|
| BE892009A (en) | 1982-05-27 |
| IT1153433B (en) | 1987-01-14 |
| DE3204716A1 (en) | 1982-09-16 |
| NL8200112A (en) | 1982-09-16 |
| JPS57154777A (en) | 1982-09-24 |
| BR8200447A (en) | 1982-11-30 |
| IT8219722A0 (en) | 1982-02-18 |
| FR2500962A1 (en) | 1982-09-03 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |