Electrical connectors – Coupling part including flexing insulation – Hinged or flexed detent on insulation engaging to secure...
Patent
1993-08-18
1995-08-29
Abrams, Neil
Electrical connectors
Coupling part including flexing insulation
Hinged or flexed detent on insulation engaging to secure...
439884, H01R 13422
Patent
active
054455413
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The invention relates to a blade contact for electric plug connectors with a strip-like contact part, a supporting body fixable on the plug casing, and with crimping attachments for securing an electrical conductor and its insulating jacket on the blade contact.
BACKGROUND OF THE INVENTION
It is known that blade contacts have to be fixed in the plug casing in the direction of plugging. For this purpose, one known blade contact has a contact part provided with a fastening recess and having transversely projecting jags, which are folded back across partial lengths, resting one on top of the other. Due to the fastening recess, the blade contact is mechanically unstable and weakened in the cross section next to the recesses; this unfavorably influences the flow of current. Furthermore, the blade contact is not capable of miniaturization. Another known blade contact is embraced across a partial length by a box tube-like, molded sheet-metal part for creating a supporting body, which part can be slipped on and secured on the contact part by means of tongue-shaped jags that can be bent into recesses of the contact part. The molded sheet-metal part acting as the supporting body is not only costly to produce, but also does not safely secure the contact blade.
SUMMARY OF THE INVENTION
The object of the invention is to reduce the constructional expenditure for blade contacts of the above type, to make the support of the blade contact in the plug casing more secure, and to create the precondition for a favorable flow of current.
According to the invention, this object is achieved as follows. A metal sheet is cut to size, with a substantially rectangular section extending across partial lengths thereof to form the contact part, and a tab on each of its two sides projecting beyond the rectangular section to form the supporting body, as well as additional tabs disposed in line with the section and laterally projecting beyond the latter for forming crimping attachments. The metal sheet is folded in by 90.degree. on itself in a plane-parallel way along a common fold line substantially over the axial length of the section forming the contact part and of the tabs, and the tabs of which are bent back outwardly, whereas the tabs for the crimping attachments are set obliquely outwards, or with a spacing parallel with the plane of the fold line. The blade contact can be formed from a single sheet-metal blank cut to size, by simple bending processes. This results in a simple development and advantageous realizability of the blade contact in terms of tool engineering, and assures exact securing of its position in the plug casing. Furthermore, the blade contact is characterized by a mechanical ruggedness that permits the utilization of materials having lower strength, but high electrical conductivity. Finally, by omitting fastening recesses, the flow of current in the blade contact is left unimpaired.
Preferably, the tabs have curved segments and plane segments connecting up with said curved segments, whereby the curved segments and the plane segments of the tabs project beyond the section of the sheet-metal blank cut to size forming the contact part. In this connection, the curved segments are shaped in such a way that the section forming the contact part and the tabs forming the supporting body have a substantially meander-like cross section transversely to the direction of plugging. It is possible in this connection to design the supporting body with any desired width relative to the contact part by selecting the radii on the curved segments accordingly.
In developing the blade contact, provision is made that the plane segments of the tabs extend either in a plane-parallel way relative to each other, or obliquely outwards toward the free end. In this connection, the tabs can be wholly or partly rigid or elastic, so that the blade contact with the tabs is insertable and securable in the plug casing under prestress, if need be.
Furthermore, provision is made to bend the free end of the plane segment of
REFERENCES:
patent: 3555496 (1971-01-01), Pearce, Jr. et al.
patent: 4253718 (1981-03-01), Bungo
patent: 4390231 (1983-06-01), Plyler et al.
May Guntram
Steinhardt Helmut
Abrams Neil
Framatome Connectors International
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