EP0661775B1 - Receptacle terminal - Google Patents

Receptacle terminal Download PDF

Info

Publication number
EP0661775B1
EP0661775B1 EP94120571A EP94120571A EP0661775B1 EP 0661775 B1 EP0661775 B1 EP 0661775B1 EP 94120571 A EP94120571 A EP 94120571A EP 94120571 A EP94120571 A EP 94120571A EP 0661775 B1 EP0661775 B1 EP 0661775B1
Authority
EP
European Patent Office
Prior art keywords
walls
contact strip
protrusions
terminal
strip
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 - Lifetime
Application number
EP94120571A
Other languages
German (de)
French (fr)
Other versions
EP0661775A1 (en
Inventor
Hidehisa Yamagami
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.)
Whitaker LLC
Original Assignee
Whitaker LLC
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=13389415&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0661775(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Whitaker LLC filed Critical Whitaker LLC
Publication of EP0661775A1 publication Critical patent/EP0661775A1/en
Application granted granted Critical
Publication of EP0661775B1 publication Critical patent/EP0661775B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/02Contact members
    • H01R13/10Sockets for co-operation with pins or blades
    • H01R13/11Resilient sockets
    • H01R13/115U-shaped sockets having inwardly bent legs, e.g. spade type
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/02Contact members
    • H01R13/10Sockets for co-operation with pins or blades
    • H01R13/11Resilient sockets

Definitions

  • This invention relates to a female terminal having the features of the pre-characterizing part of claim 1.
  • Such female terminals having a resilient contacting strip for the purpose of maintaining reliable connection with matching male terminals are known in the art, for example, female terminals described in JP-U-58-62 564. Since the resilient contacting strip of this type is bent back at the front end of the female terminal and since it is extended inside the female terminal, the bent section of the resilient contacting strip has sufficient resiliency in order to maintain reliable connection with the male terminal.
  • EP-A-0 650 223 discloses another female terminal having the features of the precharacterizing part of claim 1.
  • One protrusion on each side wall is bent into the cavity so as to support the contact strip when the contact strip is bent downward while a male tenninal is inserted into the space above the contact strip.
  • a male terminal receiving slot is formed by the contact strip and a top wall formed by bending upper portions of the two side walls such that the bent portions as disposed in one plane spaced apart from the resilient contact strip.
  • protrusions extending inside the terminal are provided at the left and the right sides of the terminal under the resilient contacting strip in one location along its length which prevent the resilient contacting strip from being moved down beyond the acceptable limit due to the downward pressure exerted by a male terminal.
  • the force is not uniformly distributed along the entire length of the resilient contacting strip but is concentrated in one location. It is desirable to be able to prevent the deformation from exceeding the limits of elasticity even when the force is concentrated in one location.
  • the object of this invention is to offer a female connector in which deformation of the resilient contacting strip does not exceed the limits of elasticity even if the force applied to it is concentrated in one location or if such a force is too strong.
  • the female terminal comprises a base section extending from the front to the back, side walls rising up from the left and right sides of said base section, a resilient contacting strip bent backwards from the front end of the base section and protrusions extending inward from at least in one side wall and located under said resilient contacting strip at predetermined intervals, and several protrusions are provided along the entire length of the above mentioned resilient contacting strip along one side wall or both side walls in pairs or in a staggered pattern.
  • the resilient contacting strip is made wider in the places corresponding to the locations of such protrusions.
  • protrusions located under the resilient contacting strip along its entire length are provided in the female terminals according to this invention, they can support the resilient contacting strip in several places when a downward force is applied to it, even when this force is concentrated at one location along the length of the resilient contacting strip, thereby preventing it from being deformed at this location beyond the limits of elasticity.
  • the edges of the strip are closer to the bases of the protrusions than in terminals of conventional design, they are to a lesser degree susceptible to bending than protrusions in conventional terminals. Therefore, they can reliably support the resilient contacting strip even when a strong downward force is applied to it, thus preventing it from being deformed beyond the limits of elasticity.
  • a female terminal having a base section and walls extending upwards therefrom defining a cavity between the walls and the base section, a resilient contact strip extending from a front of the base section and bent back into the cavity, the upstanding walls having a protrusion bent from at least one of the walls, into the cavity and below the contact strip, thereby preventing the contact strip from being deformed beyond the elastic limits thereof.
  • Figure 1 is a side view showing schematic design of an embodiment of the female terminal according to this invention.
  • Figure 2 is a longitudinal section of the female terminal shown in Fig. 1.
  • Figure 3 is a cross sectional along the line III-III in Fig. 1.
  • Figure 4 is a cross sectional along the line IV-IV in Fig. 1.
  • Figure 5 is a cross sectional along the line V-V in Fig. 1.
  • the female terminal 10 is of the box type and it comprises a base section 11 extending in the direction from the front to the back of the female terminal 10 (directions left to right in the Figs. 1 and 3, and perpendicular to the paper surface in the Figs. 4 and 5), right and left side walls 12 rising from the right and left edges of the base section 11 and a upper wall 13 formed from the upper edges of the side walls 12 which runs approximately parallel to the base section 11.
  • the resilient contacting strip 15 is bent back from the front tip of the base section 11 and it extends inward and to the back of the female terminal 10.
  • an assist leaf (a support) 16 is provided whose front end is located under the free end 15a.
  • the assist leaf 16 is provided for the purpose of increasing the contacting pressure of the resilient contacting strip 15 to the male terminal when a male contact (not shown in the drawing) is correctly inserted in the female terminal 10 by coming in contact with the free end 15a of the resilient contacting strip 15.
  • left and right protrusions 17 cut out from the left and right walls 12 are provided which are positioned under the resilient contacting strip 15 at a predetermined distance from it.
  • the portions of the resilient contacting strip 15 corresponding to the above mentioned left and right protrusions 17 are made wider than other parts of the strip.
  • left and right protrusions 17 are provided in two locations along the length of the resilient contacting strip 15 at a predetermined distance from each other, it becomes possible to prevent the resilient contacting strip 15 from a local deformation beyond the limits of elasticity even if a male terminal is inserted incorrectly producing a force concentrated in one location, because it is supported in two points along its length.
  • the portions of the resilient contacting strip 15 corresponding to the left and right protrusions 17 are made wider, they form contact with the entire length of the protrusions 17 (from their bases to their tips) when the resilient contacting strip 15 is bent downward. This prevents the bending of the protrusions 17 when the force applied to the resilient contacting strip 15 is too strong.
  • protrusions are provided in two locations at predetermined distance from each other along the length of the resilient contacting strip.
  • protrusions are made on the left and right walls; however, the protrusions may be made only on one side wall or on the both side but in a staggered pattern.
  • the embodiment of the female terminal described above is of the box type having the base, left and right walls and the upper wall. It is matter of fact that this invention is applicable also to female terminals without the upper wall.

Description

This invention relates to a female terminal having the features of the pre-characterizing part of claim 1.
Such female terminals having a resilient contacting strip for the purpose of maintaining reliable connection with matching male terminals are known in the art, for example, female terminals described in JP-U-58-62 564. Since the resilient contacting strip of this type is bent back at the front end of the female terminal and since it is extended inside the female terminal, the bent section of the resilient contacting strip has sufficient resiliency in order to maintain reliable connection with the male terminal.
EP-A-0 650 223 (based on an application filed prior to the present application but published after the priority date of the present application) discloses another female terminal having the features of the precharacterizing part of claim 1. One protrusion on each side wall is bent into the cavity so as to support the contact strip when the contact strip is bent downward while a male tenninal is inserted into the space above the contact strip. According to said EP-A-0 650 223 a male terminal receiving slot is formed by the contact strip and a top wall formed by bending upper portions of the two side walls such that the bent portions as disposed in one plane spaced apart from the resilient contact strip.
When a male terminal is inserted in a female terminal having such a resilient contacting strip at an angle, there is the danger that the tip of the male terminal will exert downward pressure on the resilient contacting strip, thereby deforming it more than it is necessary, which can result in a loss of the initial resilience of the resilient contacting strip. In order to prevent such deformations exceeding the elasticity limits, in the utility models described in the above disclosure, protrusions extending inside the terminal are provided at the left and the right sides of the terminal under the resilient contacting strip in one location along its length which prevent the resilient contacting strip from being moved down beyond the acceptable limit due to the downward pressure exerted by a male terminal.
However, in some cases, the force is not uniformly distributed along the entire length of the resilient contacting strip but is concentrated in one location. It is desirable to be able to prevent the deformation from exceeding the limits of elasticity even when the force is concentrated in one location.
However, since in the conventional design described above the protrusions are provided only in one location, the deformation exceeding the limits of elasticity can be prevented if the force is concentrated exactly at that location. But if the force is concentrated in a location where no protrusions are provided, the possibility that deformation at that location will exceed the limits of elasticity is high.
Another problem with the terminals of conventional design is that in some cases the protrusions (whose purpose is to prevent the resilient contacting strip from moving down beyond predetermined limits) can bend themselves, if the force applied to the resilient contacting strip is too strong.
The object of this invention is to offer a female connector in which deformation of the resilient contacting strip does not exceed the limits of elasticity even if the force applied to it is concentrated in one location or if such a force is too strong.
In order to achieve the above stated purposes, the female terminal according to the features of claim 1 comprises a base section extending from the front to the back, side walls rising up from the left and right sides of said base section, a resilient contacting strip bent backwards from the front end of the base section and protrusions extending inward from at least in one side wall and located under said resilient contacting strip at predetermined intervals, and several protrusions are provided along the entire length of the above mentioned resilient contacting strip along one side wall or both side walls in pairs or in a staggered pattern. The resilient contacting strip is made wider in the places corresponding to the locations of such protrusions.
Since a number of protrusions located under the resilient contacting strip along its entire length are provided in the female terminals according to this invention, they can support the resilient contacting strip in several places when a downward force is applied to it, even when this force is concentrated at one location along the length of the resilient contacting strip, thereby preventing it from being deformed at this location beyond the limits of elasticity.
Due to the fact that the resilient contacting strip is made wider in the places corresponding to the locations of the protrusions, the edges of the strip are closer to the bases of the protrusions than in terminals of conventional design, they are to a lesser degree susceptible to bending than protrusions in conventional terminals. Therefore, they can reliably support the resilient contacting strip even when a strong downward force is applied to it, thus preventing it from being deformed beyond the limits of elasticity.
A female terminal having a base section and walls extending upwards therefrom defining a cavity between the walls and the base section, a resilient contact strip extending from a front of the base section and bent back into the cavity, the upstanding walls having a protrusion bent from at least one of the walls, into the cavity and below the contact strip, thereby preventing the contact strip from being deformed beyond the elastic limits thereof.
An embodiment of the present invention will now be described with reference to the accompanying drawings; in which:
Figure 1 is a side view showing schematic design of an embodiment of the female terminal according to this invention.
Figure 2 is a longitudinal section of the female terminal shown in Fig. 1.
Figure 3 is a cross sectional along the line III-III in Fig. 1.
Figure 4 is a cross sectional along the line IV-IV in Fig. 1.
Figure 5 is a cross sectional along the line V-V in Fig. 1.
The female terminal 10 according to this invention depicted in the drawings is of the box type and it comprises a base section 11 extending in the direction from the front to the back of the female terminal 10 (directions left to right in the Figs. 1 and 3, and perpendicular to the paper surface in the Figs. 4 and 5), right and left side walls 12 rising from the right and left edges of the base section 11 and a upper wall 13 formed from the upper edges of the side walls 12 which runs approximately parallel to the base section 11.
The resilient contacting strip 15 is bent back from the front tip of the base section 11 and it extends inward and to the back of the female terminal 10. In the vicinity of the free end 15a of the resilient contacting strip 15 which is facing the back end of the terminal, an assist leaf (a support) 16 is provided whose front end is located under the free end 15a. The assist leaf 16 is provided for the purpose of increasing the contacting pressure of the resilient contacting strip 15 to the male terminal when a male contact (not shown in the drawing) is correctly inserted in the female terminal 10 by coming in contact with the free end 15a of the resilient contacting strip 15.
In this embodiment, in two locations situated at a predetermined distance from each other along the length of the resilient contacting strip 15, left and right protrusions 17 cut out from the left and right walls 12 are provided which are positioned under the resilient contacting strip 15 at a predetermined distance from it. On the other hand, the portions of the resilient contacting strip 15 corresponding to the above mentioned left and right protrusions 17 (that is the portions of the resilient contacting strip 15 which come in contact with the protrusions 17 when the resilient contacting strip 15 is pressed down) are made wider than other parts of the strip.
Therefore, due to the fact that in this embodiment left and right protrusions 17 are provided in two locations along the length of the resilient contacting strip 15 at a predetermined distance from each other, it becomes possible to prevent the resilient contacting strip 15 from a local deformation beyond the limits of elasticity even if a male terminal is inserted incorrectly producing a force concentrated in one location, because it is supported in two points along its length.
In addition, since the portions of the resilient contacting strip 15 corresponding to the left and right protrusions 17 are made wider, they form contact with the entire length of the protrusions 17 (from their bases to their tips) when the resilient contacting strip 15 is bent downward. This prevents the bending of the protrusions 17 when the force applied to the resilient contacting strip 15 is too strong.
Above, we gave explanations concerning an embodiment of the female terminal according to this invention, however, this invention is not limited to these specific configurations of this embodiment, but also may comprise various modifications.
For example, in the above mentioned embodiment, protrusions are provided in two locations at predetermined distance from each other along the length of the resilient contacting strip. However, it is possible to increase the number of locations in which the resilient contacting strip is supported.
In the embodiment described above, protrusions are made on the left and right walls; however, the protrusions may be made only on one side wall or on the both side but in a staggered pattern.
The embodiment of the female terminal described above is of the box type having the base, left and right walls and the upper wall. It is matter of fact that this invention is applicable also to female terminals without the upper wall.

Claims (7)

  1. A female tenninal (10) having a base section (11) and walls (12) extending upwards therefrom defining a cavity between said walls (12) and said base section (11), a resilient contact strip (15) extending from a front of said base section (11) and bent back into said cavity, said upstanding walls (12) having at least one protrusion (17) bent from at least one of said walls (12), into said cavity and below said contact strip (15), thereby preventing the contact strip (15) from being defonned beyond the elastic limits thereof, characterized in that
    a plurality of protrusions (17) are disposed at locations
    a) along one side wall (12), or
    b) along both side walls (12)
    b1) in pairs or
    b2) in a staggered pattern.
  2. The terminal as in claim 1, wherein said contact strip (15) includes a portion which is wider than the rest of said contact strip (15), the wider portion engages the protrusion (17) when said contact strip (15) is deflected.
  3. The terminal as in claim 2, wherein both of said walls (12) have protrusions (17) extending therefrom and said contact strip (15) has wider portions corresponding to said protrusions (17).
  4. The terminal as in claims 1, 2 or 3 further comprising an upper wall (13) extending between tops of said walls (12), thereby forming a box-like structure.
  5. The terminal as in any of claims 1 to 4, further comprising an assist leaf (16) having a front end located under said contact strip (15) to provide greater pressure on a mating contact.
  6. The tenninal as in any of claims 3 to 5, wherein two protrusions (17) on each of said walls (12) and said contact strip (15) has wider protions corresponding to said protrusions (17).
  7. The terminal as in any of claims 2 to 6, wherein said wider portion of said contact strip (15) is wide enough to contact an entire length of said protrusion (17).
EP94120571A 1993-12-24 1994-12-23 Receptacle terminal Expired - Lifetime EP0661775B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP68983/93 1993-12-24
JP1993068983U JP2596913Y2 (en) 1993-12-24 1993-12-24 Female terminal

Publications (2)

Publication Number Publication Date
EP0661775A1 EP0661775A1 (en) 1995-07-05
EP0661775B1 true EP0661775B1 (en) 1998-02-11

Family

ID=13389415

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94120571A Expired - Lifetime EP0661775B1 (en) 1993-12-24 1994-12-23 Receptacle terminal

Country Status (7)

Country Link
EP (1) EP0661775B1 (en)
JP (1) JP2596913Y2 (en)
KR (1) KR100322232B1 (en)
CN (1) CN1108438A (en)
DE (1) DE69408523T2 (en)
ES (1) ES2112471T3 (en)
MY (1) MY116223A (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0935795A (en) * 1995-07-18 1997-02-07 Sumitomo Wiring Syst Ltd Female terminal metal fitting and its manufacture
JPH10189102A (en) * 1996-12-27 1998-07-21 Amp Japan Ltd Electric contact
DE19828985B4 (en) * 1998-06-29 2008-01-24 The Whitaker Corp., Wilmington Electrical socket contact
DE10161514B4 (en) * 2000-12-18 2007-04-12 Sumitomo Wiring Systems, Ltd., Yokkaichi socket
JP3767506B2 (en) * 2002-04-03 2006-04-19 住友電装株式会社 Female terminal fitting
US7387550B2 (en) * 2005-07-21 2008-06-17 Tyco Electronics Corporation Dual beam receptacle contact
JP4672510B2 (en) * 2005-10-05 2011-04-20 日本圧着端子製造株式会社 Connecting terminal
KR200464156Y1 (en) * 2008-07-22 2012-12-13 한국단자공업 주식회사 Electrical terminal
JP6784650B2 (en) * 2017-07-24 2020-11-11 ヒロセ電機株式会社 Terminals, connectors, and connector devices with contacts

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0650223A1 (en) * 1993-10-26 1995-04-26 CONNECTEURS CINCH, Société Anonyme dite : Female electrical contact terminal

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3076171A (en) * 1960-04-28 1963-01-29 Gen Motors Corp Electric terminal means
JPS5862564U (en) * 1981-10-22 1983-04-27 トヨタ自動車株式会社 electrical connector
FR2576458B2 (en) * 1985-01-24 1987-02-06 Stocko France Sa FEMALE TERMINAL FOR ELECTRICAL CONNECTION
US4790773A (en) * 1986-09-17 1988-12-13 E. I. Du Pont De Nemours And Company Electrical receptacle

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0650223A1 (en) * 1993-10-26 1995-04-26 CONNECTEURS CINCH, Société Anonyme dite : Female electrical contact terminal

Also Published As

Publication number Publication date
DE69408523D1 (en) 1998-03-19
KR100322232B1 (en) 2002-05-13
JP2596913Y2 (en) 1999-06-28
MY116223A (en) 2003-12-31
JPH0742004U (en) 1995-07-21
DE69408523T2 (en) 1998-07-09
KR950021881A (en) 1995-07-26
EP0661775A1 (en) 1995-07-05
CN1108438A (en) 1995-09-13
ES2112471T3 (en) 1998-04-01

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