WO1996019849A1 - Logement pour carte de circuits imprimes - Google Patents

Logement pour carte de circuits imprimes Download PDF

Info

Publication number
WO1996019849A1
WO1996019849A1 PCT/US1995/016662 US9516662W WO9619849A1 WO 1996019849 A1 WO1996019849 A1 WO 1996019849A1 US 9516662 W US9516662 W US 9516662W WO 9619849 A1 WO9619849 A1 WO 9619849A1
Authority
WO
WIPO (PCT)
Prior art keywords
printed circuit
circuit board
guide
insertion opening
portions
Prior art date
Application number
PCT/US1995/016662
Other languages
English (en)
Inventor
Akihiro Yodogawa
Original Assignee
Berg Technology, Inc.
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 Technology, Inc. filed Critical Berg Technology, Inc.
Priority to EP95944179A priority Critical patent/EP0799508A4/fr
Priority to US08/849,306 priority patent/US6276950B1/en
Publication of WO1996019849A1 publication Critical patent/WO1996019849A1/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
    • H01R12/71—Coupling devices for rigid printing circuits or like structures
    • H01R12/72—Coupling devices for rigid printing circuits or like structures coupling with the edge of the rigid printed circuits or like structures
    • H01R12/721—Coupling devices for rigid printing circuits or like structures coupling with the edge of the rigid printed circuits or like structures cooperating directly with the edge of the rigid printed circuits

Definitions

  • This invention relates to a socket for a printed circuit board into which an edge portion of a printed circuit board is directly inserted to directly form a connector.
  • such a connector has a header portion having a plurality of spring contacts.
  • the spring contacts are arranged in a housing made of an insulating material and forming a socket.
  • the contact portions of the spring contacts are project into an insertion opening for a printed circuit board which is called a daughter board.
  • These contact portions form contact rows arranged at predetermined intervals in the axial direction of the insertion opening.
  • a clearance for fitting the edge portion of the printed circuit board is formed between the contact rows.
  • the insertion opening side have grooves which are alternately arranged at predetermined intervals, at a pair of opposed walls forming the insertion opening of the header portion. The tops of the contact portions project from the grooves, retreating in the grooves and applying a spring force to the edge portion.
  • the contact portions can come back to their initial positions when the edge portion of the printed circuit board is fitted in the insertion opening. For this reason, the contact portions of the spring contacts certainly contact the contact portion of the printed circuit board and hold the printed circuit board at the header portion by an entire spring force of the spring contacts.
  • a pair of guide portions are arranged close to both longitudinal ends of the insertion opening.
  • the guide portions guide three surfaces of the printed circuit board along the sides thereof and prevent the edge portion and the header portion from being aligned erroneously.
  • the guide portions guides the three surfaces along the both sides of the printed circuit board.
  • the top edge portion of the printed circuit board is inserted, at desired attitude and in desired position, into the insertion opening. Since the contact portions of the spring contacts work as resistors to the edge portion inserted in this manner, the printed circuit board needs to be pushed down with a very strong force against the urging force of the spring contacts.
  • the printed circuit board since the printed circuit board is guided by the guide portions, it can be reliably pushed down at its predetermined position, without causing erroneous alignment, even when it is pushed with such a strong force.
  • a connector has been developed which incorporates an eject mechanism.
  • a printed circuit board is guided between a pair of guide portions. It needs to be extracted parallel with the guide portions. Eject mechanism are therefore provided at both guide portions for guiding the sides of the printed circuit board.
  • the connector becomes complicated in structure and comes to have a large size.
  • the eject mechanisms In order to extract the printed circuit board in parallel, the eject mechanisms must be operated simultaneously. If one eject mechanism is operated prior to the other, the printed circuit board will be inclined between the guide portions. In the worst case, the board will be fixed between the guide portions and will no longer be able to be extracted without difficulty.
  • This invention has been made in consideration of the above matter. Its object is to provide a simple socket for a printed circuit board, in which the board can be reliably fitted and from which the board can be easily and readily extracted by a simple operation.
  • a socket for a printed circuit board comprises: a header portion having an insertion opening provided between a pair of opposing walls, for allowing a plurality of contacts to project and for receiving the printed circuit board; a pair of guide portions extending from portions close to longitudinal ends of the insertion opening of the header portion, for guiding sides of the printed circuit board in the inserting and extracting direction thereof; and eject lever arranged at one of the guide portions, for extracting one end of the printed circuit board from the insertion opening; and an elastic guide arm arranged at the other guide portion, for guiding a side of the other end of the printed circuit board.
  • the eject lever extracts one end of the printed circuit board from the insertion opening, the guide arm is pressed and elastically deformed on the side of the other end of the printed circuit board, to allow the printed circuit board to rotate between the pair of guide portions.
  • the guide portions comprise a pair of walls extending in the inserting and extracting direction of the printed circuit board, a pair of guide rails extending from the walls in opposite directions to guide the sides of the printed circuit board, and an eject lever container arranged outside the guide rails between the walls.
  • the eject lever comprise an operation portion axially coupled to the walls in the eject lever container and a hook portion provided on a header side of the operation portion to extract the printed circuit board from the insertion opening when the operation portion is rotated.
  • the eject lever have swelling portions projection from the operation portion toward the walls.
  • the swelling portions are held by protruding portions which projects from the walls in the opposite directions when the printed circuit board is fitted in the insertion opening.
  • the pair of guide rails form a guide groove communicating with the insertion opening and guiding three surface along the sides of the printed circuit board, extend along part of the walls and restrict the angle through which the eject lever is rotated.
  • the other guide portion comprise a pair of walls extending in the inserting and extracting direction of the printed circuit board and defining a gap containing the guide arm, and a pair of guide rails projecting from the walls in the opposite directions and forming, together with the guide arm, a guide groove communicating with the insertion opening.
  • the other guide portion comprises a connection wall connecting the walls at the side remote from the guide groove, and a clearance is formed between the connection wall and the guide arm.
  • a pair of guide portions guides its side when the printed circuit board is fitted. Even if great force is applied as an edge portion of the printed circuit board is inserted into the insertion opening against an urging force of the spring contacts, the guide portions guide both sides of the board, respectively. The printed circuit board is thereby reliably guided to a predetermined position without causing any erroneous alignment.
  • the eject lever provided at one of the guide portions is operated, extracting and one end of the printed circuit board from the insertion opening.
  • the guide arm of an elastic structure arranged at the other guide portion is elastically deformed while pressed at the other side of the board.
  • the guide arm is then rotated between the pair of guide portions. No unnecessary force is applied between the printed circuit board and the guide portions, and the force the spring contacts applies to the printed circuit board whose one end is extracted from the insertion opening is reduced by half since one end of the board has already been extracted. The entire board can be easily extracted from the insertion opening.
  • One of the guide portions may have an eject lever container located between a pair of walls and adjacent to a pair of guide rails.
  • the eject lever is contained compact design the eject lever container.
  • a pair of guide rails may form a guide groove for guiding three surfaces along the sides of the printed circuit board, extending along parts of the walls and restricting the rotary range of the eject lever. If so, the guide rails accurately guide the sides of the printed circuit board, and the eject lever is always rotated in a predetermined range.
  • the other guide portion may have a pair of guide rails extending from a pair of wall portions and forming a guide groove together with the guide arm. In this case, the printed circuit board is guided between the guide rails and rotated stably.
  • the other guide portion has a connection wall for connecting the pair of wall portions and a clearance is formed between the connection wall and the guide arm, the guide arm is prevented from being significantly deformed and further protected from damage resulting from contact members.
  • FIG. 1 a schematic and partially cutaway view showing a socket for a printed circuit board according to an embodiment of this invention
  • Fig. 2 a partially cutaway plan view showing an inclined state of an eject lever of the socket in Fig. 1 ;
  • Fig. 3 a partially cutaway and plan view showing an upright state of the eject lever of the socket in Fig. 1 ;
  • Fig. 4 an explanatory view showing a state of fitting a printed circuit board to the socket in Fig. 1 ;
  • Fig. 5 an explanatory view showing a state of extracting the printed circuit board.
  • Figs. 1 to 5 show a socket 10 for a printed circuit board according to an embodiment of the invention.
  • the socket 10 comprises a header portion 14 at which a plurality of spring contacts 12 are arranged at with contact pitches.
  • An insertion opening 16 is formed at the center of the header portion 14, for receiving an edge portion 6 of a printed circuit board 8.
  • the socket 10 is designed to fit, in an upright position, on a surface of a mother board not shown, with the insertion opening 16 opening to the upper side.
  • the foot portions 15 for positioning and fixing project downward from the header portion 14, thus positioning and fixing the socket 10.
  • Grooves 13 accommodating the spring portions of the spring contacts 12 are alternately formed in a pair of opposing walls 18 and 20 which form the insertion opening 16 at the header portion 14.
  • the grooves 13 formed in each of the walls 18 and 20 open into the insertion opening 16.
  • Contact portions supported by the spring portions project from the grooves 13 into the insertion opening 16, are electrically connected to contact portions aligned at the edge portion 6 inserted into the insertion opening 16, and form contact rows for mechanically holding the printed circuit board 8 at the socket 10.
  • the guide portion 22 has a pair of walls 26 and 28 extending in the insertion and extraction direction of the printed circuit board 8.
  • a pair of guide rails 30 and 32 project from the walls 26 and 28 in directions opposing each other.
  • An eject lever container 34 is provided outside the guide rails 30 and 32, i.e. at a side opposite to the insertion opening 16, for containing an eject lever 40.
  • the guide rails 30 and 32 define a guide groove 36 between them.
  • the guide groove 36 communicates with the insertion opening 16 and guides the printed circuit board 8 along the sides thereof. More precisely, the groove 36 guides three surfaces of the board 8, i.e., two broad surfaces on which circuits and electronic elements such as memories, etc.
  • the guide pieces 31 and 33 further project from the guide rails 30 and 32, respectively.
  • the guide rails 30 and 32 have inclined surfaces on their upper portions.
  • the guide pieces 31 and 32 have inclined surfaces. All these inclined surfaces define a flaring upper portion of the guide groove 36, facilitating the insertion of the printed circuit board 8.
  • the guide pieces 31 and 33, which can guide the narrow end surface of the printed circuit board 8, need not be extended along the entire lengths of the guide rails 30 and 32, respectively, they may be provided at their part as shown in Fig. 2(A).
  • the eject lever 40 contained in the eject lever container 34 has an operation portion 42 and a hook portion 44 arranged at a lower end of the operation portion 42.
  • the eject lever 40 is rotatably connected to the walls 26 and 28 by a shaft 46 provided at the operation portion 42.
  • the eject lever 40 can rotate but between an inclined position shown in Fig. 2 and an upright position shown in Fig. 3.
  • the operation portion 42 abuts on the lower ends of the guide rails 30 and 32.
  • the hook portion 44 projects into the insertion opening 16 (Fig. 5).
  • the operation portion 42 abuts on the opposing surfaces of the guide rails 30 and 32.
  • the hook portion 44 is arranged in the groove 34 (Fig. 4) provided for accommodating the eject lever 40.
  • a finger hook portion 48 is provided at the top of the operation portion 42, and a projection 50 is provided at the side opposite to the finger hook portion 48, to be held in the engagement groove 4 (Fig. 1 ) of the printed circuit board.
  • the finger hook portion 48 and the projection 50 project more significantly upward than a pair of walls 26 and 28 of the guide portion 22. Hence, they can be easily operated by a hand.
  • a top of the finger hook portion 48 is positioned at almost the same height as that of the other guide portion 24 (Fig. 4). Further, as clarified in Figs. 2 and 3, swelling portions 52 and 54 project from the operating portion 42 of the eject lever 40 toward the walls 26 and 28.
  • Protruding portions 37 and 39 project from the walls 26 and 28 into the eject lever container 34.
  • Grooves 37a and 39a are formed at the sides of the guide rails 30 and 32 of the protruding portions 37 and 39, for containing the swelling portions 52 and 54 of the eject lever 40 and for holding the eject lever in the upright position shown in Fig. 3.
  • the swelling portions 52 and 54 of the eject lever 40, set in engagement with the protruding portions 37 and 39, are formed in a curved shape.
  • the holding grooves 37a and 39a for containing these swelling portions 52 and 54 are defined, each by two inclined surfaces intersecting with each other as shown in Figs. 2(B) and 3(B).
  • the swelling portions 52 and 54 can therefore be automatically held at their central positions or the intersection of the inclined surfaces.
  • the guide portion 24 opposing the guide portion 22 has a pair of walls 56 and 58 which extend in the insertion and extraction direction of the printed circuit board 8.
  • Guide rails 60 and 62 project from the sides of the walls 56 and 58, which are close to the insertion opening 16, in directions opposing each other.
  • a guide arms 64 of an elastic structure is arranged between a pair of the walls 56 and 58 of the guide portion 24. The lower of the arm 64 is combined with the walls 56 and 58.
  • the guide arm 64, and guide rails 60 and 62 define a guide groove 66 for guiding the that side of the board 8 which is close to the groove 5.
  • the guide groove 66 communicates with the insertion opening 16 of the header portion 14.
  • the guide rails 60 and 62 guide the wide surfaces of the printed circuit board 8 inserted into the socket 10, whereas the guide rails 64 guides the narrow end surface of the board 8.
  • a connection wall 68 connects the walls 56 and 58 of the guide portion
  • connection wall 68 and guide rail 64, whereby the guide rail 64 can freely bend, due to its elastic force, to protect the guide rail 64 from the damage caused by an external force.
  • the eject lever 40 When the printed circuit board 8 is inserted, the eject lever 40 is set in the inclined position, and the projection 50 for engagement has already been retreated from the guide groove 36 of the guide portion 22, as is illustrated in Fig. 1. At this time, the top of the hook portion 44 provided at the lower end of the eject lever 40 projects into the insertion opening 16.
  • the edge portion 6 of the printed circuit board 8 then comes to face the insertion opening 16, bringing the groove 5 to a polar key (not shown).
  • the edge portion 6 is pushed down into the insertion opening 16, sliding on the sides of the board 8 along the guide grooves 36 and 66 of the guide portions 22 and 24.
  • the contact portions of the spring contacts 12, which project into the insertion opening 16, are pushed at the edge portion 6 onto the bottom of the groove 13. Due to the bias of the spring portions, the edge portion 6 is pressed, holding the respective contacts in firm contact with the edge portion 6.
  • the printed circuit board 8 is mechanically held at the socket 10 via the edge portion 6.
  • the projection 50 of the eject lever 40 are held in the groove 4 of the printed circuit board 8. at a glance we can know whether o not the printed circuit board 8 has been inserted into a predetermined position.
  • the eject lever 40 does not make hindrance to the other instruments on the mother board since almost all of its parts are contained compact in the eject lever container 34 of the guide portion 22 (Fig. 3). The mount density of the mother board can be thereby increased.
  • the finger hook portion 48 of the eject lever 40 is moved outward and the operation portion 42 is rotated clockwise around the shaft 46.
  • the swelling portions 52 and 54 are thereby released from the holding groves 37a and 39a while pushing the protruding portions 37 and 39 and bending the wall portions 26 and 28.
  • the hook portion 44 enters the insertion opening 16 (Fig. 1 ,) from its top, and the lower end portion of the board 8 is pressed from the lower side.
  • the printed circuit board 8 is thereby rotated, elastically deforming the guide arm 64 providing at the other guide portion 24.
  • Fig. 5 shows the printed circuit board 8 rotated between the guide portions 22 and 24.
  • the force of the spring contacts 12 holding the printed circuit board 8 is reduced by half to be considerably small.
  • the printed circuit board 8 can be further rotated, if necessary, and can easily be extracted by one hand in this rotated state. Even if the board 8 is in this rotated state, it can be rotated stably in a common plane and can be prevented by the connection all 68 from being rotated excessively rotation. This is because both sides edges of the board 8 are arranged in the guide grooves 36 and 66 (Fig. 1 ) of the guide portions 22 and 24 and are guided along these guide grooves 33 and 36.
  • the guide arm 64 After the printed circuit board 8 is extracted, the guide arm 64 returns to its initial state by virtue of its elasticity, as shown in Fig. 1. Therefore, the socket 10 can firmly hold the printed circuit board 8 and can easily release the board 8, simply by hand, though it is simple in structure, having only one eject lever 40.
  • the socket of the present invention though simple in structure, can firmly hold a printed circuit board and can release the board, by a simple operation.
  • One of the guide portions may have a container located between a pair of walls and adjacent to a pair of guide rails, for containing the eject lever.
  • the eject lever can be contained compact in this container, increasing the mount density of the printed circuit board which the socket holds. Furthermore, when the swelling portions projecting from the operation portion are set in engagement with the protruding portions which project from the wall portions, the structure remains compact even if the printed circuit board is not fitted.
  • a pair of guide rails may define a guide groove for guiding three surfaces along the sides of the printed circuit board, extending along part of the walls and restricting the rotation of the eject lever. In this case, the sides of the board can be reliably guided, preventing the board from being fixed.
  • the other guide portion may have a pair of guide rails projecting from a pair of walls, defining a guide groove together with the guide arm. If so, the printed circuit board is readily guided while being extracted from the socket.
  • the other guide portion may have a connection wall for connecting the pair of walls and a clearance may be provided between the connection wall and the guide arm. If this is the case, the guide arm is prevented from being deformed or damaged excessively.

Landscapes

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

Abstract

Logement (10) pour carte de circuits imprimés (8) permettant d'introduire et d'extraire une carte (8) facilement et de façon fiable, sans l'abîmer. Ce logement (10) comporte deux guides (22, 24) reliés à un connecteur (14) muni d'une fente d'insertion (16) qui reçoit une carte de circuits imprimés (8), dont les côtés sont guidés dans la direction où elle est extraite. Un levier d'éjection (22) placé sur l'un des guides (22) permet d'extraire une extrémité de la carte (8) de la fente d'insertion. Un bras de guidage élastique (64), placé sur l'autre guide (24), guide le chant de l'autre extrémité de la carte (8). Lorsque le levier d'éjection (40) extrait une extrémité de la carte (8) de la fente d'insertion (16), le bras de guidage (64) fait pivoter la carte (8) entre les deux guides (22, 24).
PCT/US1995/016662 1994-12-21 1995-12-20 Logement pour carte de circuits imprimes WO1996019849A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP95944179A EP0799508A4 (fr) 1994-12-21 1995-12-20 Logement pour carte de circuits imprimes
US08/849,306 US6276950B1 (en) 1994-12-21 1995-12-20 Socket for printed circuit board

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP6/318142 1994-12-21
JP31814294A JP3462920B2 (ja) 1994-12-21 1994-12-21 プリント基板用ソケット

Publications (1)

Publication Number Publication Date
WO1996019849A1 true WO1996019849A1 (fr) 1996-06-27

Family

ID=18095971

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1995/016662 WO1996019849A1 (fr) 1994-12-21 1995-12-20 Logement pour carte de circuits imprimes

Country Status (5)

Country Link
EP (1) EP0799508A4 (fr)
JP (1) JP3462920B2 (fr)
KR (1) KR100383373B1 (fr)
TW (1) TW281812B (fr)
WO (1) WO1996019849A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3942034B2 (ja) * 2004-03-05 2007-07-11 タイコエレクトロニクスアンプ株式会社 イジェクタ機構付カードエッジコネクタ
KR100818621B1 (ko) * 2006-08-11 2008-04-01 삼성전자주식회사 메모리 모듈, 메모리 모듈용 소켓 및 그를 구비한 메인보드

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4898540A (en) * 1987-12-28 1990-02-06 Yamaichi Electric Mfg. Co., Ltd. Connector for a printed circuit board
US5364282A (en) * 1993-08-16 1994-11-15 Robinson Nugent, Inc. Electrical connector socket with daughtercard ejector
US5413497A (en) * 1991-12-09 1995-05-09 Lwee; Nai Hock Electrical connector
US5445531A (en) * 1994-08-23 1995-08-29 The Whitaker Corporation Card edge connector with shim lock and extractor mechanism
US5470240A (en) * 1993-05-27 1995-11-28 Japan Aviation Electronics Industry, Limited Card edge connector comprising levers for a card board on both ends of an insulator rod
US5470242A (en) * 1994-04-20 1995-11-28 Tongrand Limited Dual readout socket connector

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8823558D0 (en) * 1988-10-07 1988-11-16 Mcmurdo Instr Co Ltd Method & apparatus for connecting circuit boards &c
US5226833A (en) * 1991-08-23 1993-07-13 E. I. Du Pont De Nemours And Company Electrical connector
US5207598A (en) * 1992-02-24 1993-05-04 Molex Incorporated Edge card connector

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4898540A (en) * 1987-12-28 1990-02-06 Yamaichi Electric Mfg. Co., Ltd. Connector for a printed circuit board
US5413497A (en) * 1991-12-09 1995-05-09 Lwee; Nai Hock Electrical connector
US5470240A (en) * 1993-05-27 1995-11-28 Japan Aviation Electronics Industry, Limited Card edge connector comprising levers for a card board on both ends of an insulator rod
US5364282A (en) * 1993-08-16 1994-11-15 Robinson Nugent, Inc. Electrical connector socket with daughtercard ejector
US5470242A (en) * 1994-04-20 1995-11-28 Tongrand Limited Dual readout socket connector
US5445531A (en) * 1994-08-23 1995-08-29 The Whitaker Corporation Card edge connector with shim lock and extractor mechanism

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP0799508A4 *

Also Published As

Publication number Publication date
KR100383373B1 (ko) 2003-07-10
JPH08185928A (ja) 1996-07-16
EP0799508A1 (fr) 1997-10-08
EP0799508A4 (fr) 1998-02-11
TW281812B (fr) 1996-07-21
JP3462920B2 (ja) 2003-11-05

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