WO2002087298A2 - Detection switch mounted in a card socket - Google Patents
Detection switch mounted in a card socket Download PDFInfo
- Publication number
- WO2002087298A2 WO2002087298A2 PCT/US2002/012766 US0212766W WO02087298A2 WO 2002087298 A2 WO2002087298 A2 WO 2002087298A2 US 0212766 W US0212766 W US 0212766W WO 02087298 A2 WO02087298 A2 WO 02087298A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- contact
- card
- switch
- detection switch
- contact member
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K5/00—Casings, cabinets or drawers for electric apparatus
- H05K5/02—Details
- H05K5/0256—Details of interchangeable modules or receptacles therefor, e.g. cartridge mechanisms
- H05K5/0286—Receptacles therefor, e.g. card slots, module sockets, card groundings
-
- 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
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/0013—Methods or arrangements for sensing record carriers, e.g. for reading patterns by galvanic contacts, e.g. card connectors for ISO-7816 compliant smart cards or memory cards, e.g. SD card readers
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/0013—Methods or arrangements for sensing record carriers, e.g. for reading patterns by galvanic contacts, e.g. card connectors for ISO-7816 compliant smart cards or memory cards, e.g. SD card readers
- G06K7/0056—Methods or arrangements for sensing record carriers, e.g. for reading patterns by galvanic contacts, e.g. card connectors for ISO-7816 compliant smart cards or memory cards, e.g. SD card readers housing of the card connector
- G06K7/0069—Methods or arrangements for sensing record carriers, e.g. for reading patterns by galvanic contacts, e.g. card connectors for ISO-7816 compliant smart cards or memory cards, e.g. SD card readers housing of the card connector including means for detecting correct insertion of the card, e.g. end detection switches notifying that the card has been inserted completely and correctly
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/66—Structural association with built-in electrical component
- H01R13/70—Structural association with built-in electrical component with built-in switch
- H01R13/703—Structural association with built-in electrical component with built-in switch operated by engagement or disengagement of coupling parts, e.g. dual-continuity coupling part
- H01R13/7031—Shorting, shunting or bussing of different terminals interrupted or effected on engagement of coupling part, e.g. for ESD protection, line continuity
Definitions
- the present invention relates to a card socket for receiving a card-like medium such as a memory card or SD card, and more particularly to a detection switch mounted in a card socket for detecting the presence of a card and/or preventing write-access to the card.
- a conventional card socket includes a card-receiving space for receiving a card such as a memory or SD card, and a detection switch to detect the presence or insertion of the card.
- a detection switch comprises contact members responsive to insertion of the card into the card-receiving space.
- FIG. 14 shows a conventional card socket for such cards. As shown, a card 101 is inserted in a card-receiving space 102 of a socket housing 100, which has first, second and third contact pieces 103, 104 and 105 mounted at one longitudinal side of the housing. First and third contact pieces 103 and 105 are adapted to be deflected during insertion of card 101.
- Second and third contact pieces 104 and 105 constitute a first switch used for detecting the presence of a card, for example, and first and second contact pieces 103 and 104 constitute a second switch used for a second function such as write protect.
- card 101 includes a movable piece 106 at one longitudinal side thereof, and the deflection of first contact piece 103 of the write protect detection switch is controlled due to the position of movable piece 106 on card 101.
- Another example of a detection switch is shown in Japan Patent Laid Open No. 11 -
- a detection switch includes a contact member responsive to insertion of a card for moving in a direction parallel to the thickness of the card until it contacts a mating switch contact.
- Still another example of a detection switch includes a contact member responsive to the insertion of a card by wiping the mating switch contact (see Japan Patent No. 2973402).
- the contact members of a detection switch are likely to collect particles of foreign substance or to have oxide coating formed thereon, thus contributing to unstable switching conditions - particularly in a detection switch that does not include wiping action such as that shown in the conventional switch of FIG. 11.
- a conventional detection switch uses contact members of different shapes and sizes which require multiple stamping dies and multiple parts to make up a detection switch.
- the detection switch of FIG. 11 uses three different kinds of contact members, and another conventional detection switch uses two different kinds of contact members. Two detection switches if combined, need to use three different kinds of contact members. This type of design is not necessarily cost effective or simple.
- one object of the present invention is to provide a detection switch for a card socket which assures that the switching action is stable and includes contacts which utilize a wiping action to ensure such stability.
- Another object of the present invention is to provide a detection switch for a card socket using contact members of the same design, accordingly permitting the reduction of manufacturing costs.
- a contact member is so designed according to the present invention that it includes contact sections formed on its opposite ends, one adapted to move in the card width-parallel plane and be contacted by the front end of a card when being inserted in the card-receiving space, and the other adapted to move in the card thickness-parallel direction.
- a detection switch is mounted in the card-receiving space of a card socket and includes contact members responsive to insertion of a card into the card-receiving space and includes two or more contact members, each having contact sections formed on opposite ends thereof, the contact section at one end having a front contact formed in the card width-parallel plane in which the card is contained when being inserted in the card-receiving space, the front contact defining a first switch contact formed on one side, and the contact section of the other end having a rear contact formed in the card thickness-parallel direction, the rear contact section defining a second switch formed on one side thereof in confronting relation with the first switch contact whereby insertion of the card into the card-receiving space causes the first switch contact to move in the card width-parallel plane and deflect the second switch contact in the card thickness-parallel direction.
- a single detection switch can be made up by arranging two contact members in series with the first contact of one of the contact members positioned adjacent to the second contact of the other contact member, thereby allowing the first contact to wipe the second contact upon insertion of a card into the card socket.
- a series of two detection switches can be made up by arranging three contact members in series with the first contact piece of the head contact member cut and removed, and with the second contact piece of the tail contact member cut and removed.
- Each of the contact members are of the same design, which has the first contact formed on one end and the second contact formed on the other end.
- Such a contact member may be made in a single stamping die by stamping and forming a thin metal sheet or by pressing a circular, elliptical, triangular or square metal rod into the required shape.
- the front end of the card abuts the front contact section of one contact member, moving it in the card width-parallel plane until the first contact has reached the second contact of the rear contact section of the other contact member. Further insertion of the card in the card socket moves the second contact in the card thickness-parallel direction, allowing the first contact to wipe the second contact.
- FIG. 1 is an enlarged perspective view of contact members which make up a detection switch according to a first embodiment of the invention
- FIG. 2 is an enlarged side view of the detection switch shown in FIG. 1
- FIG. 3 is a plan view of a card socket equipped with a detection switch according to the present invention
- FIG. 4 is a bottom view of the card socket
- FIG. 5 is a left side view of the card socket;
- FIG. 6 is a right side view of the card socket;
- FIG. 7 is a rear view of the card socket
- FIG. 8 is a front view of the card socket
- FIG. 9 is a plan view of the card socket with its metal shield removed.
- FIG. 10 is a perspective view of the three contact members which make up two detecti on switch es ;
- FIG. 11 is a bottom view of a second embodiment of the invention showing a normally-closed switch configuration
- FIG. 12 is a plan view of the detection switch of FIG. 11.
- FIG. 13 is an enlarged perspective view of two contact members of the second embodiment of the detection switch shown in FIGS. 11 and 12, and
- FIG. 14 illustrates a card socket equipped with a conventional detection switch.
- FIG. 1 shows a detection switch 10, according to a first embodiment of the invention, removed from a housing 31 of a card socket 30.
- a card medium 33 such as a memory, IC or SD card is inserted into a card-receiving space 32 of a card-receiving socket 30 in a direction indicated by arrow 34 and detection switch 10 is arranged on one longitudinal side of the housing in the same direction as the insertion of the card (see FIG. 4).
- a first embodiment of detection switch 10 comprises two contact members 11A and 1 IB responsive to insertion of card 33 into card-receiving space 32 as described hereinafter.
- FIG. 1 shows a detection switch 10, according to a first embodiment of the invention, removed from a housing 31 of a card socket 30.
- a card medium 33 such as a memory, IC or SD card is inserted into a card-receiving space 32 of a card-receiving socket 30 in a direction indicated by arrow 34 and detection switch 10 is arranged on one longitudinal side of the housing
- FIG. 1 shows an enlarged view of contact members 11 A and 1 IB arranged in series with a front contact section of following contact member 11 A overlapping a rear contact section of leading contact member 11B in the card-inserting direction as indicated by arrow 34.
- the front contact section of following contact member 11 A is formed into a"V"-shape in the card width-parallel plane in which card 33 is contained, so that an up-slope 12 of the" V"- shape confronts the front end of card 33 upon insertion of a card.
- the rear contact section of leading contact member 1 IB is formed in the card thickness-parallel direction and includes an including flat surface 13 formed downwardly from a flat planar surface 17.
- a portion of inclined flat surface 13 of rear contact section of contact member 1 IB is coplanar with up-slope 12 of the front contact section of contact member 11 A in the card width-parallel plane, leaving a gap between a lower side 12a of up-slope 12 and counter side 13a of inclined flat surface 13.
- lower side 12a of up-slope 12 and counter side 13a of inclined flat surface 13 provide a first switch contact 14 and a second switch contact 15 of detection switch 10.
- down-slope 16 which is contiguous with up-slope 12 of the "V"-shaped contact piece is accommodated under flat surface 17 which is contiguous with inclined flat surface 13.
- a card socket 30 equipped with a detection switch assembly has an insulating plastic housing 31, which has a "U"-shape as best seen in FIGS. 4 and 9.
- "U"-shaped housing 31 has a card-receiving space 32 between its opposite side pieces 37 for receiving card 33.
- Card-receiving space 32 is covered by a metal shell 38, which is mounted to card housing 31.
- a lateral end piece 39 integrally connects opposite side pieces 37 and defines the end of card receiving space 32.
- Lateral end piece 39 has a plurality of terminals 40 passing therethrough, each terminal 40 having a contact piece 41 extending into card receiving space 32 and adapted to make mechanical and electrical contact with a corresponding contact (not shown) in card 33.
- each terminal 40 has a tail piece 42 extending outside of lateral end piece 39 for soldering to a corresponding conductor pad on an underlying printed circuit substrate.
- FIG. 4 a further embodiment of a detection switch assembly is shown. This detection switch assembly is mounted in socket housing 31 along its right longitudinal side piece 37 (as viewed in FIG. 4).
- the detection switch assembly includes three similar contact members 11 A, 1 IB and 11C arranged in series, each having two different switch contacts formed on its opposite ends.
- One detection switch 10 is composed of following contact member 11 A and the intermediate contact member 1 IB, and another detection switch 10 is composed of leading contact member 11C and intermediate contact member 1 IB.
- each contact member is made from a stamped and formed metal sheet having a "V"-shaped front contact section 19 at one end, and a ramp-shaped rear contact section 20 at an opposite end as described above with respect to the contacts shown in FIG. 1.
- front contact section 19 is composed of contiguous up and down slopes 12 and 16 and rear contact section 20 is composed of contiguous flat and down slope 17 and up and down slope 13.
- Leading contact member 11C has a rear contact section only - there is no front contact section.
- contact members 11A, 1 IB and 11C are arranged in-line and mounted in longitudinal side piece 37 by inserting their shanks 18 into longitudinal slot 43 and by locating engagement pieces 18a in the side of the housing (see FIG. 10).
- Front contact sections 19 of contact members 11 A and 1 IB project inwardly into card space 32, thereby permitting them to move outwardly by front end 33a of card 33 when the card is inserted into card space 32.
- rear contact sections 20 of contact members 1 IB and 11C confront front contact sections 19, thereby causing them to move downwardly by slope 12 when card 33 is inserted in card space 32.
- two detection switches 10 are provided.
- Shank 18 of each contact member has a tail portion 21 extending perpendicular to its length.
- Tail portion 21 is coplanar with the bottom of housing 31 when the contact member is mounted in the housing, and tail portion 21 can therefore be soldered to a corresponding pad of a printed circuit substrate (not shown).
- One of the detection switches is composed of contact member 1 IB and contact member 1 IC, and is used to detect the presence of a card in a socket.
- the other detection switch is composed of contact member 11 A and contact member 1 IB, and can be used to prevent write access to a card for example.
- front contact section 19 of contact member 11 A may be so positioned that it confronts a movable piece 106 of card 33 (FIG. 11) when the card is inserted in the card socket.
- each can be made of contact members of the same design using the same stamping die and arranged in series, accordingly, manufacturing costs can be reduced relative to conventional detection switches each made of different parts.
- the first and last contacts in the series are selectively modified so as to remove the portion of the contact members that are not used as part of the switch.
- contact member 1 IC is modified by removing front contact section 19.
- contact member 11A is reduced in length by removing rear contact section 20. Obviously this would contributes to the overall down-sizing of card socket 30.
- Socket housing 31 may also include a card ejecting mechanism and a card retaining mechanism fixed to the other longitudinal side piece 37 (i.e. the left side in FIG. 4).
- the card ejecting mechanism is composed of an ejection rod 44 movably fixed to longitudinal side piece 37 and an ejection lever 45 rotatably fixed to the corner whereat longitudinal side piece 37 and lateral end piece 39 are integrally connected.
- Ejection rod 44 has a push-button 46 at its end and moves slidingly inwardly within longitudinal side piece 37 of socket housing 31 when a force is applied to push-button 46.
- the card retaining mechanism may include a resilient member 51 stamped and formed from a thin metal sheet.
- resilient member 51 comprises a straight portion 52 and a curved portion 53 integrally connected thereto.
- Resilient member 51 is mounted in longitudinal side piece 37 of socket housing 31 by mounting straight portion 52 in longitudinal slot 54 and allowing curved portion 53 to project into card-receiving space 32 of card socket 30.
- Card 33 has a recess or notch (not shown) formed on one longitudinal side thereof, and card 33 can be held positively in the card socket by allowing curved portion 53 of resilient member 51 to snap into the recess of card 33.
- the card socket may include opposite metal fitting nails 55 and opposite positioning posts 56 fixed to its bottom. Metal fitting nails 55 are attached to ends of opposite longitudinal side pieces 37 and are flush with the bottom of the card socket.
- Positioning posts 56 are integrally formed on the bottom of the socket housing by molding, and are adapted to be received in corresponding positioning holes in the printed circuit substrate.
- the card socket can be positioned accurately on the printed circuit substrate.
- a third embodiment of the detection switch is shown in FIGS. 11 through 13.
- a card socket 90 has three contact members 71A, 71B and 71C arranged in series on one longitudinal side of "U" -shaped housing 91.
- a first detection switch 70 is made by the contact members 71 A and 7 IB, and a second detection switch 70 is made by contact members 71B and 71C.
- each contact member is made by stamping and forming a thin metal sheet into the configuration shown in FIGS. 12 and 13.
- each contact comprises a shank 78 having a front or head contact and a rear or tail contact integrally connected thereto.
- the head contact comprises up and down slopes 72 and 76 that form a "V" shaped contact in the card-width parallel plane, and a first planar contact 74 integrally connected to the end of down slope 76.
- the tail contact comprises a second planar contact 75 integrally connected to the end of shank 78, and includes a contact projection 75a formed on one side thereof (see FIG. 13).
- the shanks 78 of contact members 71 A, 7 IB and 71C are mounted in longitudinal housing slot 98 of housing 91 with their "V" shaped head contacts projecting into card- receiving space 92.
- first planar contact 74 of contact member 71 A abuts second contact 75 of contact member 7 IB and first contact 74 of contact member 71B abuts second contact 75 of contact member 71C. Accordingly, this switch is normally- closed.
- contact member 71C does not include a shank or first planar contact.
- these switch contacts are of the same design and regardless of the number of detection switches used, they can each be made by arranging the same terminal design in series. Accordingly, a single metal stamping die can be used, and a reduction of the cost of manufacturing can be achieved. The same design can also be used for the first and last switch contact in the series, by removing the portion of the contact that is not used in the detection switch.
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- Engineering & Computer Science (AREA)
- Artificial Intelligence (AREA)
- Computer Vision & Pattern Recognition (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Coupling Device And Connection With Printed Circuit (AREA)
- Details Of Connecting Devices For Male And Female Coupling (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2002307491A AU2002307491A1 (en) | 2001-04-23 | 2002-04-23 | Detection switch mounted in a card socket |
US10/472,284 US6899557B2 (en) | 2001-04-23 | 2002-04-23 | Detection switch mounted in a card socket |
KR10-2003-7013774A KR100527320B1 (en) | 2001-04-23 | 2002-04-23 | Detection switch mounted in a card socket |
EP02764303A EP1382233A2 (en) | 2001-04-23 | 2002-04-23 | Detection switch mounted in a card socket |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2001123877A JP4562310B2 (en) | 2001-04-23 | 2001-04-23 | Detection switch in card socket |
JP123877/2001 | 2001-04-23 | ||
JP2001239471A JP4578028B2 (en) | 2001-08-07 | 2001-08-07 | Detection switch in card socket |
JP239471/2001 | 2001-08-07 |
Publications (3)
Publication Number | Publication Date |
---|---|
WO2002087298A2 true WO2002087298A2 (en) | 2002-10-31 |
WO2002087298A3 WO2002087298A3 (en) | 2002-12-19 |
WO2002087298B1 WO2002087298B1 (en) | 2003-06-12 |
Family
ID=26613983
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2002/012766 WO2002087298A2 (en) | 2001-04-23 | 2002-04-23 | Detection switch mounted in a card socket |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1382233A2 (en) |
KR (1) | KR100527320B1 (en) |
AU (1) | AU2002307491A1 (en) |
TW (1) | TW557015U (en) |
WO (1) | WO2002087298A2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2141774A1 (en) * | 2008-06-30 | 2010-01-06 | Mitsumi Electric Co., Ltd. | Connector |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2016060510A1 (en) * | 2014-10-17 | 2016-04-21 | 몰렉스 엘엘씨 | Card socket for electronic device |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0669590A2 (en) * | 1994-02-23 | 1995-08-30 | Molex Incorporated | IC pack connector with detect switch |
US6015311A (en) * | 1996-12-17 | 2000-01-18 | The Whitaker Corporation | Contact configuration for smart card reader |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH10255910A (en) * | 1997-03-14 | 1998-09-25 | Mitsumi Electric Co Ltd | Ic card connector |
-
2002
- 2002-04-23 TW TW091205533U patent/TW557015U/en not_active IP Right Cessation
- 2002-04-23 EP EP02764303A patent/EP1382233A2/en not_active Withdrawn
- 2002-04-23 KR KR10-2003-7013774A patent/KR100527320B1/en not_active IP Right Cessation
- 2002-04-23 AU AU2002307491A patent/AU2002307491A1/en not_active Abandoned
- 2002-04-23 WO PCT/US2002/012766 patent/WO2002087298A2/en not_active Application Discontinuation
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0669590A2 (en) * | 1994-02-23 | 1995-08-30 | Molex Incorporated | IC pack connector with detect switch |
US6015311A (en) * | 1996-12-17 | 2000-01-18 | The Whitaker Corporation | Contact configuration for smart card reader |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 1998, no. 14, 31 December 1998 (1998-12-31) & JP 10 255910 A (MITSUMI ELECTRIC CO LTD), 25 September 1998 (1998-09-25) * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2141774A1 (en) * | 2008-06-30 | 2010-01-06 | Mitsumi Electric Co., Ltd. | Connector |
US7955103B2 (en) | 2008-06-30 | 2011-06-07 | Mitsumi Electric Co., Ltd. | Connector |
Also Published As
Publication number | Publication date |
---|---|
TW557015U (en) | 2003-10-01 |
AU2002307491A1 (en) | 2002-11-05 |
KR20030090775A (en) | 2003-11-28 |
WO2002087298B1 (en) | 2003-06-12 |
EP1382233A2 (en) | 2004-01-21 |
KR100527320B1 (en) | 2005-11-09 |
WO2002087298A3 (en) | 2002-12-19 |
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