WO1995005693A1 - Connecteur electrique - Google Patents

Connecteur electrique Download PDF

Info

Publication number
WO1995005693A1
WO1995005693A1 PCT/US1994/009267 US9409267W WO9505693A1 WO 1995005693 A1 WO1995005693 A1 WO 1995005693A1 US 9409267 W US9409267 W US 9409267W WO 9505693 A1 WO9505693 A1 WO 9505693A1
Authority
WO
WIPO (PCT)
Prior art keywords
latch
section
housing
restricting
circuit board
Prior art date
Application number
PCT/US1994/009267
Other languages
English (en)
Inventor
Wang-I Yu
Original Assignee
Berg Electronics Manufacturing B.V.
Connector Systems Technology N.V.
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
Application filed by Berg Electronics Manufacturing B.V., Connector Systems Technology N.V. filed Critical Berg Electronics Manufacturing B.V.
Priority to US08/592,416 priority Critical patent/US5730614A/en
Priority to EP94925913A priority patent/EP0714563A4/fr
Priority to TW083108616A priority patent/TW256985B/zh
Publication of WO1995005693A1 publication Critical patent/WO1995005693A1/fr

Links

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
    • H01R12/7005—Guiding, mounting, polarizing or locking means; Extractors
    • 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
    • H01R12/82—Coupling devices connected with low or zero insertion force
    • H01R12/83—Coupling devices connected with low or zero insertion force connected with pivoting of printed circuits or like after insertion

Definitions

  • the present invention relates to electrical connectors and, in particular, to a connector for establishing board-to- board interconnection.
  • Various electrical connectors have been known which are adapted to connect a mother board (first circuit board) to a daughter board (second circuit board) , such as a single in- line memory module, or SIMM connector.
  • JPN. UM. Application 1-4128 specification discloses an electrical connector having a resin housing attachable to a mother board and a pair of metal latches for latching a daughter board.
  • the housing has an opening in its upper surface receiving the daughter board and contact terminals provided in the opening so as to set the daughter board in electrical contact with the other board.
  • the metal latch comprises a fitting section fitted between both ends of the housing, an elastic section extending upwardly from the fitting section and a latching section extending from the elastic section and latching the daughter board in place.
  • the fitting section of the latch is inverse U-shaped in cross section.
  • the inverse U-shaped fitting section is set in contact with the top surface arr :i both the side surfaces of the housing, a total of three suriaces, and fitted there whereby the latch is fixed to the housing.
  • the daughter board being obliquely inserted into the opening in the housing, is swung with the daughter board set between a pair of latches.
  • the pair of latches are pushed away from each other by the side edges of the daughter board and hence the latches are elastically flexed in such a direction as to push the paired latches away from each other. Then when the daughter board achieves a predetermined attitude, the paired latches are elastically returned back to their original state, so that the daughter board is latched to the housing. By so doing, the daughter board is held at a predetermined attitude.
  • the latch has its inverse U-shaped fitting section fitted in the housing in a three-surface fitting relation.
  • the three-surface fitting structure is inadequate in its strength and, if the daughter board is repeatedly attached and detached, the fitting section of the latch is deformed due to stress caused thereby and the fixing of the latch to the housing is incomplete.
  • an electrical connector which connects a first circuit board to a second circuit board through a plurality of contact terminals.
  • the latch is fitted in the housing in a four-surface fitting relation to the housing and latch-to- housing contact is made in a five-surface contacting relation.
  • latch-to-housing contact and fitting are achieved in three- surface fitting relation, it is possible to maintain the latches in a firmly fixed state even if the attaching and detaching of the circuit board to and from the connector are repeated many times.
  • restricting members for restricting any undesirable displacement of the latch are provided all around the latch, it is possible to restrict any excessive deformation of the latch even if any unwanted force acts upon the latch due to an operation error, etc., and hence to maintain the characteristic of the latch. It is also possible to operate the latch with a small force because an effective spring length is provided for.
  • Fig. 1 is a perspective view showing a housing of an electrical connector of the present invention
  • Fig. 2 is a perspective view showing a state of the major section of the electrical connector of Fig. 1 with a circuit board mounted thereon;
  • Fig. 3 is a perspective view showing a pair of metal latches to be mounted in the housing of Fig. 1;
  • Fig. 4 includes (A) and (B) , (A) being a perspective view in enlarged view showing a latch fitting base of the housing of Fig. 1 and (B) being a perspective view showing a state of a latch fitted in the latch fitting base of (A) .
  • An electrical connector of the present invention as shown in Figs. 1 and 2 mechanically and electrically connects a mother board (not shown) to a daughter board 2.
  • the daughter board 2 is comprised of, for example, a single in-line memory module (SIMM) with a memory element 4 attached thereto.
  • SIMM 2 has an engaging hole 6a at each end portion thereof.
  • a plurality of solder pads 6b are arranged at one side of SIMM 2, i.e., that side which is to be inserted into the connector in the manner described below.
  • reference numerals 2a and 2b show a front surface and a rear surface of SIMM 2, respectively.
  • the connector includes an elongated housing 10 injection-molded from an insulating resin material and the housing 10 has parallel end faces 10a and 10b and top and bottom surfaces 12 and 14, respectively.
  • the top surface 12 is stepped to provide an upper surface section 12a and lower surface section 12b, noting that, here, the higher surface section 12a is parallel to the bottom surface 14 and perpendicular to the end faces 10a and 10b and the lower surface section 12b is so inclined as to correspond to the attitude assumed by SIMM, as will be set out below, when SIMM is operated.
  • a step surface section 16 is provided between the upper surface section 12a and the lower surface section 12b of the housing such that it is formed perpendicular to the top and bottom surfaces 12 and 14.
  • An opening 18 is provided along the length of the housing to hold the one side of SIMM 2 there.
  • the opening 18 leads to the lower surface section 12b of the housing 10 from the step surface section 16 side, but only the lower surface section 12b is shown.
  • the opening 18 is so designed as to enable SIMM 2, which has assumed the operation attitude shown in Fig. 2, to be inclined relative to the mother board with the connector attached thereto.
  • the "operation attitude" of SIMM 2 is intended to mean the state in which SIMM 2, having been inserted into the opening 18 from the top surface 12 side of the housing, assumes a predetermined attitude (an inclined attitude in the present embodiment) relative to the mother board and makes a complete electrical connection to the mother board through a plurality of conductive contact terminals 20 as set forth below.
  • the plurality of conductive contact terminals 20 are arranged in the opening 18 along the length of the housing.
  • the contact terminals 20 are forced into corresponding recesses 18a in the housing 10 in an orthogonal relation to the opening 18 and firmly set there.
  • the contact terminals 20 can be any of the elastic contact terminals known in the art.
  • a first support wall 22 extends from each end of the lower surface section 12b in an obliquely upward direction corresponding to the operation attitude of SIMM so as to support the rear surface 2b of SIMM 2.
  • a projection 24 is provided on the top surface of the first support wall 22 so as to engage a corresponding engaging hole 6a in the daughter board and to assure proper alignment of the SIMM 2 in the connector.
  • a second support wall 26 extends from each first support wall 22 such that it provides a step section on a lower side.
  • a wall surface 26a is provided in a direction vertical to the width direction of the housing 10 such that it is located between the first and second support walls 22 and 26.
  • the second support wall 26 has an L-shaped member 28 set upwardly toward the first support wall 22.
  • the L-shaped member 28 comprises a column member 28a extending from the second support wall 26 and a projection 28b extending from the column member 28a toward the inside, and in the width direction, of the housing 10. Further, the lower surface of the projection 28b provides a horizontal wall surface 28d in a width direction of the housing 10.
  • latch-mount sections 30 are provided one at each end of the step surface section 16 of the housing so that a metal latch is mounted there.
  • the latch-mount section 30 will be set out below in more detail.
  • the bottom surface 14 of the housing provides a surface on which the mother board is to be mounted.
  • a circular-column leg 80 extends from each end portion of the housing and is mounted on the mother board by being inserted into a corresponding mount hole in the mother board, not shown, and set there.
  • each latch 50 is formed of a metal sheet (phosphor bronze, for instance) having a predetermined elastic property.
  • the metal latch 50 has an intermediate section 54, long arm section 56 and U-shaped section 58.
  • the first end section 52 is substantially perpendicularly bent in relation to and merges with the intermediate section 54.
  • the long arm section 56 extends from the intermediate section 54 in an opposed relation to the first end section 52 and is bent at its forward end portion to provide a U-shaped section 58.
  • the forward portion of the U-shaped section 58 is bent to provide the second end section 60 substantially parallel to the intermediate section 54.
  • a hook 62 extends at the outward end surface of the first end section 52 so as to elastically urge the side edge of SIMM 2.
  • a lug 64 extends at the outer end face of the arm 56 so that the latch 50 may be manually operated.
  • a pair of legs 66a, 66b extend in the same direction as that of the second end section 60.
  • the legs 66a and 66b are formed in a mutually opposed relation and are contacted with a latch fitting base 32 as set forth below.
  • a first flat contact surface 68a is provided on the outer surface of the U-shaped section 58 at an area from which the legs 66a and 66b extend.
  • the inner surfaces of the leg 66a, leg 66b and second end section 60 of the latch 50 provide second, third and fourth flat contact surfaces 68b, 68c and 68d, respectively.
  • These contact surfaces 68a-68d of the latch 50 provide a fitting area corresponding to the latch fitting base 32 as will be set out below.
  • a pair of such latches 50, 50 are symmetrically formed relative to each other. With the latches 50, 50 mounted on the housing 10, their hook-to-hook spacing is made somewhat narrower than the width of SIMM 2 so that SIMM 2 can be latched between both the side edges of the latches.
  • a latch mount section 30 of the housing 10 is equipped with the latch fitting base 32 and latch support base 34 integral with the housing 10.
  • Either the latch fitting base 32 or the latch support base 34 is inclined at its attitude as in the case of the first and second support walls 22 and 26.
  • the latch support bases 34 extend on both the ends of the step surface section 16 as viewed in the width direction of the step surface section 16 and the upper surface of the latch support base 34 provides an inclined surface 34a corresponding to the operation attitude of SIMM 2.
  • the outer surface of the closed end of the U-shaped section 58 of the latch 50 abuts against the inclined surface 34a.
  • the latch fitting base 32 is located adjacent the latch support base and has a substantially hexahedral configuration.
  • the latch fitting base 32 provides, at its lower side, four wall surfaces 36, 38, 40 and 42 vertical to the step surface section 16 with a base seat 44 defined on its top surface.
  • the latch fitting base 32 is provided integral with support wall 22 of the housing 10 through an inside wall surface 36 situated on the opening 18 side and integral with the step surface of the housing 10 through a lower surface.
  • the inside wall surface 36 is disregarded in view of its small exposed area. Then, of the six wall surfaces of the latch fitting base 32, four wall surfaces 38, 40, 42 and 44 are actually exposed except for the inside wall surface 36 and lower surface.
  • the fitting area of the latch 50 is fitted over the exposed four wall surfaces of the latch fitting base. With the fitting area of the latch 50 fitted over the latch fitting base 32 the aforementioned four wall surfaces of the latch fitting base 32 are placed in contact with the corresponding contact surfaces of the fitting section of the latch 50 as will be set out below.
  • the outside wall surface 38 opposing the inside wall surface 36 of the latch fitting base 32 is parallel to the housing end face (10a, 10b) .
  • a pair of recesses are formed between the side wall surfaces 40, 42 and the base seat 44 of the latch fitting base 32 to receive the legs of the latch. That is, in order to locate the side walls 40 and 42 more inside the vertical wall 44b of the side surfaces of the base seat 44, the side walls 40 and 42 of latch fitting.base are so arranged as to gradually narrow their distance from the inside wall surface toward the outside wall surface. As a result, a pair of first recesses are provided between the side wall surface 40, 42 and the base seat 44.
  • the leg(66a) -to-leg(66b) distance of the latch 50 are so set as to be gradually narrowed along the direction in which the legs extend. Further, the height of the side wall surfaces 40 and 42 provided between the housing's step surface section 16 and the base seat 44 is set substantially equal to the height of the legs 66a and 66b.
  • the legs 66a and 66b of the latch 50 received .
  • the paired first recesses have their upper end sections and lower end sections set in contact with the base seat 44 and housing's step surface section 16, respectively, so that the legs are prevented from being moved in the up/down direction.
  • a pair of recesses are provided in the housing's step surface section 16 so as to receive the lower rear corners 70 of the legs 66a, 66b.
  • the second recesses are provided by the housing's top surface section 16 and latch support base 34 provided orthogonal to the step surface section 16. Since the corner areas 70 of the legs 66a and 66b are received in the second recesses, they are prevented from being moved in a backward (X+) direction.
  • the fourth contact surface 68d at the second end section 60 of the latch 50 is set in contact with a top surface 44a of the base seat 44a.
  • the latch 50 is prevented from being moved in the back/fourth and right/left directions through the contacting of the latch fitting base 32 with the first to fourth contact surfaces 68a to 68a of the latch 50 as set out above.
  • a projection 72 be provided on the top surface 44a of the base seat 44 and that a hole 74 for engaging with a projection 72 be provided in the second end section 60 of the latch 50.
  • SIMM 2 When SIMM 2 is to be attached to the connector, SIMM is inserted into the opening 18 of the housing 10 and, upon being swung relative to the first support walls 22, SIMM has its side ends first abutted against the inclined surfaces 62a of the hooks 62. Upon further movement of SIMM, the side ends of SIMM, being abutted against the inclined surfaces 62a of the hooks of the latches, push the first end sections 52 of the latches 50, 50 away from each other in the width (X+) direction and the latches 50 become temporarily elastically deformed. When the side ends of SIMM are moved past the lower ends 62b of the hooks, the latches 50, 50 are returned back to their original state under their own elasticity.
  • the holes 6a, 6a of SIMM 2 are fitted over the corresponding projections 24 of the first support walls 22, 22 and SIMM 2 assumes an operation attitude with its rear surface 2b supported by the first support wall 22. At this time, the lower ends 62b of the hooks are moved clear of the side end of SIMM onto the surface 2a of SIMM so that SIMM 2 is held at an operation attitude.
  • SIMM 2 When SIMM 2 is to be detached from the connector, the lugs 64 of the latches 50, 50 are pushed by an operator's fingers away from each other in the X+ direction and the lower ends 62b, 62b of the hooks are moved from the surface 2a of SIMM outwardly of the side end of SIMM. By so doing, SIMM 2 is disengaged from the latches 50 and can be taken out of the opening 18.
  • the inner surface of a forward end portion 52a at an area between the forwardmost end of the latch 50 and the hook 62, abuts against a vertical surface 28c of the column member 28a such that no further displacement of the latch occurs, thus preventing the latches _J from being displaced beyond their elastic deformation limit.
  • the outer surface of the first end section 52 is abutted against wall surface 26a between the first support wall 22 and the second support wall 26 of the housing 10 whereby X- direction displacement is restricted.
  • a force acts due to a contact load caused between the contact terminals 20 and SIMM 2 when it is in an operational attitude.
  • At least a portion of the lower side end face of the first end section 52 of the latch 50 and at least a portion of the lower side end face of the arm 56 are abutted against the second support wall 26, thus restricting any excessive Y- direction stress.
  • the Y+ and Y- forces correspond to those forces bending the metal latch 50 in the width direction. Since known stock metal plates from which a latch of this type is generally made has high rigidity in that direction, if an excessive force in one of these directions occurs there is no expectation that the latch will be returned back to its original state under its own elastic force. Thus, without the stress restriction provided by the present invention the fixing of the latch 50 to the housing 10 can become loosened and it is, therefore, necessary to restrict any excessive stress in the Y+ and Y- direction in the manner set forth above.
  • the U-shaped section 58 abutting against the inclined surface 34a of the latch support base 34 serves as a spring which receives a force when the latch 50 is pushed in the Z- direction.
  • the effective spring length of the latch 50 is made relatively long by the bending of the portion between the fitting section and the arm of the latch 50 by about 180°, i.e., U-shaped section 58 provides a desirable effective spring length for the latch. As a result, a latching operation can be made with a smaller force than a latch which has been used for a conventional electrical connector.
  • the daughter board 2 may take on a vertical, horizontal, oblique, or any other operational attitude and, according to the operational attitude, it is possible to change or modify the housing.
  • the operational attitude of the daughter board 2 is vertical or nearly vertical to the mother board, it is possible to design the housing 10 so that a plurality of daughter boards are mounted thereon.
  • the shapes of the latch fitting base 32, latch support base 34 and latch 50 are not restricted to ones as disclosed in the specification and explained above. These members can be changed or modified without departing from the spirit and scope of the present invention.

Landscapes

  • Details Of Connecting Devices For Male And Female Coupling (AREA)
  • Coupling Device And Connection With Printed Circuit (AREA)

Abstract

L'invention concerne un connecteur électrique dans lequel des éléments de verrouillage sont fixés solidement à un boîtier (10). Une base de montage (32), au-dessus de laquelle est montée l'extrémité inférieure de l'élément de verrouillage (50) et une base de support (34) servant à supporter une section en forme de U s'étendant depuis l'extrémité inférieure de l'élément d'accrochage (50) se trouvent à l'extrémité de la partie (16) de surface en étage du boîtier (10). Les parties d'extrémité inférieures de l'élément de verrouillage (50) possèdent une forme conçue pour entourer la base de montage (32) sur quatre côtés et pour être en contact étroit avec la base de montage (32) sur les quatre côtés. Quand l'élément de verrouillage (50) est monté, une partie de son extrémité inférieure est maintenue dans l'évidement défini par la base de montage (32), la base de support (34) et la partie (16) de surface en étage du boîtier. L'élément de verrouillage (50) est monté solidement au-dessus de la base de montage (32), de telle manière qu'un orifice (74) dudit élément (50) se trouve au-dessus d'une saillie (72) située sur la surface supérieure de la base de montage (32).
PCT/US1994/009267 1993-08-19 1994-08-17 Connecteur electrique WO1995005693A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US08/592,416 US5730614A (en) 1993-08-19 1994-08-17 Electrical connector with improved spring metal latch mechanism
EP94925913A EP0714563A4 (fr) 1993-08-19 1994-08-17 Connecteur electrique
TW083108616A TW256985B (fr) 1993-08-19 1994-09-17

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP5/45222 1993-08-19
JP4522293U JP2603710Y2 (ja) 1993-08-19 1993-08-19 電気コネクタ

Publications (1)

Publication Number Publication Date
WO1995005693A1 true WO1995005693A1 (fr) 1995-02-23

Family

ID=12713247

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1994/009267 WO1995005693A1 (fr) 1993-08-19 1994-08-17 Connecteur electrique

Country Status (5)

Country Link
EP (1) EP0714563A4 (fr)
JP (1) JP2603710Y2 (fr)
SG (1) SG43912A1 (fr)
TW (1) TW256985B (fr)
WO (1) WO1995005693A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998026477A1 (fr) * 1996-12-13 1998-06-18 The Whitaker Corporation Connecteur electrique dote d'un element de verrouillage metallique
US6027357A (en) * 1996-12-13 2000-02-22 The Whitaker Corporation Electrical connector having metal latch

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49129832U (fr) * 1973-03-07 1974-11-07
JPS52141241U (fr) * 1976-04-21 1977-10-26
JPS5867079U (ja) * 1981-10-29 1983-05-07 新日軽株式会社 建付け調整機能を備えた室内建具

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5169333A (en) * 1991-09-27 1992-12-08 Yang Lee Su Lan Durable latch with mounting peg of memory module socket
US5226833A (en) * 1991-08-23 1993-07-13 E. I. Du Pont De Nemours And Company Electrical connector

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2704553B2 (ja) * 1989-09-22 1998-01-26 日本エー・エム・ピー株式会社 エッジコネクタおよびコネクタ用基板係止装置
US5100337A (en) * 1991-01-22 1992-03-31 Lee Chao Kuei L Electrical connector for exerting multiple elastic forces
US5286217A (en) * 1991-08-15 1994-02-15 Foxconn International Electrical connector with improved latch mechanism
US5232400A (en) * 1991-09-26 1993-08-03 E. I. Du Pont De Nemours And Company Connector device
US5154627A (en) * 1991-11-20 1992-10-13 Lee Chih Ta Electrical connector insertably fixed with simplified metal latches
US5203714A (en) * 1992-06-18 1993-04-20 Kenny Tuan Electrical connector for a printed circuit board

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5226833A (en) * 1991-08-23 1993-07-13 E. I. Du Pont De Nemours And Company Electrical connector
US5169333A (en) * 1991-09-27 1992-12-08 Yang Lee Su Lan Durable latch with mounting peg of memory module socket

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP0714563A4 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998026477A1 (fr) * 1996-12-13 1998-06-18 The Whitaker Corporation Connecteur electrique dote d'un element de verrouillage metallique
GB2334831A (en) * 1996-12-13 1999-09-01 Whitaker Corp Electrical connector having metal latch
US6027357A (en) * 1996-12-13 2000-02-22 The Whitaker Corporation Electrical connector having metal latch
GB2334831B (en) * 1996-12-13 2001-07-04 Whitaker Corp Electrical connector having a latch

Also Published As

Publication number Publication date
EP0714563A4 (fr) 1998-06-03
JP2603710Y2 (ja) 2000-03-21
TW256985B (fr) 1995-09-11
SG43912A1 (en) 1997-11-14
JPH0716377U (ja) 1995-03-17
EP0714563A1 (fr) 1996-06-05

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