EP2045879A1 - Electrical terminal - Google Patents
Electrical terminal Download PDFInfo
- Publication number
- EP2045879A1 EP2045879A1 EP08001352A EP08001352A EP2045879A1 EP 2045879 A1 EP2045879 A1 EP 2045879A1 EP 08001352 A EP08001352 A EP 08001352A EP 08001352 A EP08001352 A EP 08001352A EP 2045879 A1 EP2045879 A1 EP 2045879A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- terminal
- electrical terminal
- accordance
- arm
- spring
- 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- Withdrawn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
Images
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
- 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
- H01R4/10—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 effected solely by twisting, wrapping, bending, crimping, or other permanent deformation
- H01R4/18—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 effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping
- H01R4/183—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 effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping for cylindrical elongated bodies, e.g. cables having circular cross-section
- H01R4/184—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 effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping for cylindrical elongated bodies, e.g. cables having circular cross-section comprising a U-shaped wire-receiving portion
-
- 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
- H01R4/28—Clamped connections, spring connections
- H01R4/48—Clamped connections, spring connections utilising a spring, clip, or other resilient member
-
- 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
- H01R4/10—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 effected solely by twisting, wrapping, bending, crimping, or other permanent deformation
- H01R4/18—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 effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping
- H01R4/188—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 effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping having an uneven wire-receiving surface to improve the contact
Definitions
- the present invention relates to an electrical terminal having a crimp portion for a crimp connection to an electrical conductor.
- an electrical terminal with a crimp portion.
- the shape of the crimp portion for connection to an aluminium electrical conductor is the same shape as for connection to a copper wire.
- a two stage crimp process is used, with different compression or force rates, in order to assure base crimp resistance stability.
- aluminium shows a low tensile strength, and that aluminium is also subject to creepage.
- An electrical terminal in accordance with the present invention comprises a terminal portion; a crimp portion integral with the terminal portion; and a spring element integral with the terminal portion and/or the crimp portion and having a spring arm within the crimp portion.
- the present invention provides an integral spring element in the crimp portion of the terminal to assure a substantially permanent and constant pressure on an electrical conductor when crimped in the crimp portion.
- the terminal portion and the crimp portion have a longitudinal axis and the spring arm extends substantially parallel to the longitudinal axis to increase the effectiveness of the spring arm.
- the spring element may take any suitable form.
- the spring element is substantially U-shaped, is stamped from the terminal material, and/or is bent such that the central member of the U-shape defines the spring arm.
- the spring element is substantially L-shaped, is stamped from the terminal material, and/or is bent such that one of the arms of the L-shape defines the spring arm.
- the terminal preferably has a pair of spring elements, with the spring arms of each spring element positioned on opposed sides of the crimp portion.
- the spring arm of the or each spring element preferably has a curved, convex or sinusoidal shape. Additionally, the spring arm may have a serrated surface.
- the shape of the spring arm assists in providing a substantially constant force on the crimped conductor irrespective of any spring back proprieties or thermal relaxation of the crimp portion.
- the spring element assists in maintaining a substantially constant crimp force irrespective on any creepage proprieties of the aluminium conductor.
- a serrated surface on the spring arm assists in cracking any oxide layer on the aluminium conductor for an improved electrical connection between the terminal and the conductor.
- the first embodiment of electrical terminal 10 includes a terminal portion 12, a crimp portion 14, and a pair of spring elements 16.
- the terminal 10 is stamped and bent from sheet metallic material to integrally form the terminal portion 12, crimp portion 14 and spring elements 16.
- the terminal portion 12 is shown as a blade terminal, but it will be appreciated that the terminal portion may take any other suitable form.
- the crimp portion 14 may take any suitable form.
- the terminal portion 12 and the crimp portion 14 have (or define) a longitudinal axis A.
- the crimp portion 14 preferably is an open crimp barrel, and preferably includes one or more cut-outs 26.
- the barrel has a body 28 of semicircular cross-section and a pair of crimp wings 30 extending from the body 28.
- each spring element 16 is substantially U-shaped.
- the outer arms 18 of each U-shaped spring element 16 lie alongside the longitudinally spaced edges 20 of the crimp portion 14.
- the central arm 22 of each U-shaped spring element 16 extends between the outer arms 18 and defines the spring arm of each spring element.
- the spring arm 22 of each spring element 16 extends substantially parallel to the longitudinal axis A and lies within the crimp portion 14.
- the spring arms 22 lie on opposed sides of the crimp portion 14, and preferably lie adjacent to the crimp wings.
- the spring arm 22 of each spring element 16 is preferably curved (or convex) in shape, and preferably includes serrations 24 in its surface.
- Each outer arm 18 is a folded sheet portion which is obtained during manufacture of the electrical terminal 10 when bending the corresponding central arm 22.
- the second embodiment of electrical terminal 100 includes a terminal portion 112, a crimp portion 114, and a pair of spring elements 116.
- the terminal 100 is stamped and bent from sheet metallic material to integrally form the terminal portion 112, crimp portion 114 and spring elements 116.
- the terminal portion 112 is shown as a blade terminal, but it will be appreciated that the terminal portion may take any other suitable form.
- the crimp portion 114 may take any suitable form.
- the terminal portion 112 and the crimp portion 114 have (or define) a longitudinal axis A.
- the crimp portion 114 preferably is an open crimp barrel, and preferably includes one or more cut-outs 126.
- the barrel has a body 128 of semicircular cross-section and a pair of crimp wings 130 extending from the body 128.
- each spring element 116 is substantially L-shaped.
- One arm 118 of each L-shaped spring element 116 lies alongside one of the longitudinally spaced edges 120 of the crimp portion 114.
- the other arm 122 of each L-shaped spring element 116 extends through the crimp portion 114 and defines the spring arm of each spring element.
- the spring arm 122 of each spring element 116 extends substantially parallel to the longitudinal axis A and lies within the crimp portion 114.
- the spring arms 122 lie on opposed sides of the crimp portion 114, and preferably lie adjacent to the crimp wings.
- the spring arm 122 of each spring element 116 is preferably curved (or convex) in shape, and preferably includes serrations 124 in its surface.
- each L-shaped spring element 116 is positioned adjacent the inner longitudinal edges 120 of the crimp portion 114.
- the one arm 118 of one or both L-shaped spring element 116 may be positioned alongside the outer longitudinal edge of the crimp portion 114.
- Each one arm 118 is a folded sheet portion which is obtained during manufacture of the electrical terminal 100 when bending the corresponding other arm 122.
- each of the described embodiments includes two spring elements 16, 116, one of the spring elements may be omitted in accordance with the present invention.
- each spring element 16, 116 On crimping the crimp portion 14, 114 to an electrical conductor (not shown) the spring arm 22, 122 of each spring element 16, 116 is pressed against the electrical conductor.
- This arrangement provides the advantages of assuring a substantially permanent and constant pressure on the electrical conductor when crimped in the crimp portion 16, 116, and compensating for any spring-back of the crimp portion, thermal relaxation, and creepage (if crimped to an aluminium conductor).
Landscapes
- Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)
Abstract
Description
- The present invention relates to an electrical terminal having a crimp portion for a crimp connection to an electrical conductor.
- It is well known to provide an electrical terminal with a crimp portion. Typically the shape of the crimp portion for connection to an aluminium electrical conductor is the same shape as for connection to a copper wire. In some cases, a two stage crimp process is used, with different compression or force rates, in order to assure base crimp resistance stability. It is also well known that aluminium shows a low tensile strength, and that aluminium is also subject to creepage.
- It is an object of the present invention to overcome the above mentioned disadvantages.
- An electrical terminal in accordance with the present invention comprises a terminal portion; a crimp portion integral with the terminal portion; and a spring element integral with the terminal portion and/or the crimp portion and having a spring arm within the crimp portion.
- The present invention provides an integral spring element in the crimp portion of the terminal to assure a substantially permanent and constant pressure on an electrical conductor when crimped in the crimp portion.
- In a preferred arrangement, the terminal portion and the crimp portion have a longitudinal axis and the spring arm extends substantially parallel to the longitudinal axis to increase the effectiveness of the spring arm.
- The spring element may take any suitable form. In a preferred arrangement, the spring element is substantially U-shaped, is stamped from the terminal material, and/or is bent such that the central member of the U-shape defines the spring arm. In an alternative arrangement, the spring element is substantially L-shaped, is stamped from the terminal material, and/or is bent such that one of the arms of the L-shape defines the spring arm. In either of these arrangements, the terminal preferably has a pair of spring elements, with the spring arms of each spring element positioned on opposed sides of the crimp portion.
- The spring arm of the or each spring element preferably has a curved, convex or sinusoidal shape. Additionally, the spring arm may have a serrated surface. The shape of the spring arm assists in providing a substantially constant force on the crimped conductor irrespective of any spring back proprieties or thermal relaxation of the crimp portion. In the case where the conductor is formed from aluminium, the spring element assists in maintaining a substantially constant crimp force irrespective on any creepage proprieties of the aluminium conductor. Further, a serrated surface on the spring arm assists in cracking any oxide layer on the aluminium conductor for an improved electrical connection between the terminal and the conductor.
- Further preferred embodiments of the invention are recited in the dependent claims, in the description and in the drawings.
- The present 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 first embodiment of electrical terminal in accordance with the present invention; -
Figure 2 is a top view of the crimp portion and spring element of the terminal ofFigure 1 ; -
Figure 3 is a perspective view of a second embodiment of electrical terminal in accordance with the present invention; and -
Figure 4 is a top view of the crimp portion and spring element of the terminal ofFigure 3 . - Referring to
Figures 1 and2 , the first embodiment ofelectrical terminal 10 includes aterminal portion 12, acrimp portion 14, and a pair ofspring elements 16. Theterminal 10 is stamped and bent from sheet metallic material to integrally form theterminal portion 12,crimp portion 14 andspring elements 16. Theterminal portion 12 is shown as a blade terminal, but it will be appreciated that the terminal portion may take any other suitable form. Similarly, thecrimp portion 14 may take any suitable form. Theterminal portion 12 and thecrimp portion 14 have (or define) a longitudinal axis A. Thecrimp portion 14 preferably is an open crimp barrel, and preferably includes one or more cut-outs 26. The barrel has abody 28 of semicircular cross-section and a pair ofcrimp wings 30 extending from thebody 28. - In this first embodiment, each
spring element 16 is substantially U-shaped. Theouter arms 18 of eachU-shaped spring element 16 lie alongside the longitudinally spacededges 20 of thecrimp portion 14. Thecentral arm 22 of eachU-shaped spring element 16 extends between theouter arms 18 and defines the spring arm of each spring element. Thespring arm 22 of eachspring element 16 extends substantially parallel to the longitudinal axis A and lies within thecrimp portion 14. Thespring arms 22 lie on opposed sides of thecrimp portion 14, and preferably lie adjacent to the crimp wings. Thespring arm 22 of eachspring element 16 is preferably curved (or convex) in shape, and preferably includesserrations 24 in its surface. Eachouter arm 18 is a folded sheet portion which is obtained during manufacture of theelectrical terminal 10 when bending the correspondingcentral arm 22. - Referring to
Figures 3 and4 , the second embodiment ofelectrical terminal 100 includes aterminal portion 112, acrimp portion 114, and a pair ofspring elements 116. Theterminal 100 is stamped and bent from sheet metallic material to integrally form theterminal portion 112,crimp portion 114 andspring elements 116. Theterminal portion 112 is shown as a blade terminal, but it will be appreciated that the terminal portion may take any other suitable form. Similarly, thecrimp portion 114 may take any suitable form. Theterminal portion 112 and thecrimp portion 114 have (or define) a longitudinal axis A. Thecrimp portion 114 preferably is an open crimp barrel, and preferably includes one or more cut-outs 126. The barrel has abody 128 of semicircular cross-section and a pair ofcrimp wings 130 extending from thebody 128. - In this second embodiment, each
spring element 116 is substantially L-shaped. Onearm 118 of each L-shaped spring element 116 lies alongside one of the longitudinallyspaced edges 120 of thecrimp portion 114. Theother arm 122 of each L-shaped spring element 116 extends through thecrimp portion 114 and defines the spring arm of each spring element. Thespring arm 122 of eachspring element 116 extends substantially parallel to the longitudinal axis A and lies within thecrimp portion 114. Thespring arms 122 lie on opposed sides of thecrimp portion 114, and preferably lie adjacent to the crimp wings. Thespring arm 122 of eachspring element 116 is preferably curved (or convex) in shape, and preferably includesserrations 124 in its surface. In this second embodiment, the onearm 118 of each L-shaped spring element 116 is positioned adjacent the innerlongitudinal edges 120 of thecrimp portion 114. In an alternative arrangement, the onearm 118 of one or both L-shaped spring element 116 may be positioned alongside the outer longitudinal edge of thecrimp portion 114. Each onearm 118 is a folded sheet portion which is obtained during manufacture of theelectrical terminal 100 when bending the correspondingother arm 122. - Although each of the described embodiments includes two
spring elements - On crimping the
crimp portion spring arm spring element crimp portion -
- 10, 100
- electrical terminal
- 12, 112
- terminal portion
- 14, 114
- crimp portion
- 16, 116
- spring element
- 18, 118
- outer arm
- 20, 120
- edge
- 22, 122
- spring arm
- 24, 124
- serration
- 26, 126
- cut-out
- 28, 128
- body
- 30, 130
- crimp wing
Claims (14)
- An electrical terminal (10, 100), comprising
a terminal portion (12, 112);
a crimp portion (14, 114) integral with the terminal portion (12, 112); and
a spring element (16, 116) integral with the terminal portion (12, 112) and/or the crimp portion (14, 114) and having a spring arm (22, 122) within the crimp portion (14, 114). - An electrical terminal (10, 100) in accordance with claim 1,
characterized in that
the terminal portion (12, 112) and the crimp portion (14, 114) have a longitudinal axis (A) and the spring arm (22, 122) extends substantially parallel to the longitudinal axis (A). - An electrical terminal (10) in accordance with claim 1 or claim 2,
characterized in that
the spring element (16) is substantially U-shaped, is stamped from the terminal material, and/or is bent such that a central member of the U-shape defines the spring arm (22). - An electrical terminal (10) in accordance with claim 3,
characterized in that
outer arms (18) of the spring element (16) lie alongside the longitudinally spaced edges (20) of the crimp portion (14). - An electrical terminal (10) in accordance with claim 4,
characterized in that
each outer arm (18) is a folded sheet portion which preferably is obtained during manufacture of the electrical terminal (10) when bending the corresponding central arm (22). - An electrical terminal (100) in accordance with claim 1 or claim 2,
characterized in that
the spring element (116) is substantially L-shaped, is stamped from the terminal material, and/or is bent such that one of the arms of the L-shape defines the spring arm (122). - An electrical terminal (100) in accordance with claim 6,
characterized in that
an outer arm (118) of the spring element (116) lies alongside one of the longitudinally spaced edges (120) of the crimp portion (114). - An electrical terminal (100) in accordance with claim 7,
characterized in that
the outer arm (118) of the spring element (116) is positioned adjacent the inner or outer longitudinal edge (120) of the crimp portion (114). - An electrical terminal (100) in accordance with claim 7 or claim 8,
characterized in that
the outer arm (118) is a folded sheet portion which preferably is obtained during manufacture of the electrical terminal (100) when bending the corresponding central arm (122). - An electrical terminal (10, 100) in accordance with one of the preceding claims,
characterized in that
the terminal (10, 100) has a pair of spring elements (16, 116), with the spring arm (22, 122) of each spring element (16, 116) positioned on opposed sides of the crimp portion (14, 114). - An electrical terminal (10, 100) in accordance with one of the preceding claims,
characterized in that
the spring arm (22, 122) of the or each spring element (16, 116) has a curved, convex or sinusoidal shape. - An electrical terminal (10, 100) in accordance with one of the preceding claims,
characterized in that
the spring arm (22, 122) has a serrated surface (24, 124). - An electrical terminal (10, 100) in accordance with one of the preceding claims,
characterized in that
the terminal portion (12, 112) is a blade terminal and/or the crimp portion (14, 114) is an open crimp barrel. - An electrical terminal (10, 100) in accordance with one of the preceding claims,
characterized in that
the crimp portion (14, 114) includes one or more cut-outs (26, 126).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB0719487A GB0719487D0 (en) | 2007-10-05 | 2007-10-05 | Electrical terminal |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2045879A1 true EP2045879A1 (en) | 2009-04-08 |
Family
ID=38739192
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08001352A Withdrawn EP2045879A1 (en) | 2007-10-05 | 2008-01-24 | Electrical terminal |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP2045879A1 (en) |
GB (1) | GB0719487D0 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102015224219A1 (en) * | 2015-12-03 | 2017-06-08 | Te Connectivity Germany Gmbh | Crimp contact with improved contact and crimp connection |
JP2021096945A (en) * | 2019-12-17 | 2021-06-24 | 株式会社オートネットワーク技術研究所 | Crimp terminal and terminal-equipped electric wire |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2783447A (en) * | 1956-03-15 | 1957-02-26 | Aircraft Marine Prod Inc | Electrical connector |
US4229063A (en) * | 1975-06-24 | 1980-10-21 | Yazaki Corporation | Pressure terminal for use with aluminum wire |
FR2858118A1 (en) | 2003-07-25 | 2005-01-28 | Framatome Connectors Int | Electric crimp contact unit for motor vehicle air bag device, has crimping core having blades and deformable zones for surrounding electrical wire, and tab placed in crimping zone such that tab applies pressure on wire |
-
2007
- 2007-10-05 GB GB0719487A patent/GB0719487D0/en not_active Ceased
-
2008
- 2008-01-24 EP EP08001352A patent/EP2045879A1/en not_active Withdrawn
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2783447A (en) * | 1956-03-15 | 1957-02-26 | Aircraft Marine Prod Inc | Electrical connector |
US4229063A (en) * | 1975-06-24 | 1980-10-21 | Yazaki Corporation | Pressure terminal for use with aluminum wire |
FR2858118A1 (en) | 2003-07-25 | 2005-01-28 | Framatome Connectors Int | Electric crimp contact unit for motor vehicle air bag device, has crimping core having blades and deformable zones for surrounding electrical wire, and tab placed in crimping zone such that tab applies pressure on wire |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102015224219A1 (en) * | 2015-12-03 | 2017-06-08 | Te Connectivity Germany Gmbh | Crimp contact with improved contact and crimp connection |
EP3179560A1 (en) * | 2015-12-03 | 2017-06-14 | TE Connectivity Germany GmbH | Crimp contact with improved contacting and crimp connection |
CN106981729A (en) * | 2015-12-03 | 2017-07-25 | 泰连德国有限公司 | Crimping contact with improved contact and crimping connection |
US9853366B2 (en) | 2015-12-03 | 2017-12-26 | Te Connectivity Germany Gmbh | Crimp contact with improved contacting and crimp connection |
JP2021096945A (en) * | 2019-12-17 | 2021-06-24 | 株式会社オートネットワーク技術研究所 | Crimp terminal and terminal-equipped electric wire |
WO2021124949A1 (en) * | 2019-12-17 | 2021-06-24 | 株式会社オートネットワーク技術研究所 | Crimp terminal and terminal-equipped electric wire |
CN114788093A (en) * | 2019-12-17 | 2022-07-22 | 株式会社自动网络技术研究所 | Crimp terminal and terminal-equipped electric wire |
CN114788093B (en) * | 2019-12-17 | 2024-04-19 | 株式会社自动网络技术研究所 | Crimp terminal and electric wire with terminal |
Also Published As
Publication number | Publication date |
---|---|
GB0719487D0 (en) | 2007-11-14 |
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