U.S. patent application number 12/106914 was filed with the patent office on 2008-08-14 for memory cards having two standard sets of contacts.
Invention is credited to Edwin J. Cuellar, Eliyahou Harari, Robert C. Miller, Hem P. Takiar, Robert F. Wallace.
Application Number | 20080191033 12/106914 |
Document ID | / |
Family ID | 34966793 |
Filed Date | 2008-08-14 |
United States Patent
Application |
20080191033 |
Kind Code |
A1 |
Cuellar; Edwin J. ; et
al. |
August 14, 2008 |
Memory Cards Having Two Standard Sets Of Contacts
Abstract
Enclosed re-programmable non-volatile memory cards include at
least two sets of electrical contacts to which the internal memory
is connected. The two sets of contacts have different patterns,
preferably in accordance with two different contact standards such
as a memory card standard and that of the Universal Serial Bus
(USB). One memory card standard that can be followed is that of the
Secure Digital (SD) card. The cards can thus be used with different
hosts that are compatible with one set of contacts but not the
other. A sleeve that is moveable by hand may be included to expose
the set of contacts being used.
Inventors: |
Cuellar; Edwin J.; (San
Jose, CA) ; Harari; Eliyahou; (Saratoga, CA) ;
Miller; Robert C.; (San Jose, CA) ; Takiar; Hem
P.; (Fremont, CA) ; Wallace; Robert F.; (Fort
Meyers, FL) |
Correspondence
Address: |
DAVIS WRIGHT TREMAINE LLP - SANDISK CORPORATION
505 MONTGOMERY STREET, SUITE 800
SAN FRANCISCO
CA
94111
US
|
Family ID: |
34966793 |
Appl. No.: |
12/106914 |
Filed: |
April 21, 2008 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
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11536974 |
Sep 29, 2006 |
7364090 |
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12106914 |
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10826801 |
Apr 16, 2004 |
7152801 |
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11536974 |
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Current U.S.
Class: |
235/492 |
Current CPC
Class: |
G06K 19/077 20130101;
H05K 1/117 20130101; G06K 19/07732 20130101; G06K 19/07741
20130101; G06K 19/07733 20130101; G06K 19/072 20130101 |
Class at
Publication: |
235/492 |
International
Class: |
G06K 19/067 20060101
G06K019/067 |
Claims
1. A memory card system, comprising: an enclosed electronic card
having first and second sets of electrical contacts with different
contact patterns positioned apart from each other such that they
mate with a respective one of first and second mating receptacles
but not the other, at least the first set of contacts being carried
by an outside surface of the card, a re-programmable non-volatile
memory system within the card and operably connected to transfer
data between the memory system and outside of the card with
different signal protocols through either of the first or second
sets of contacts without use of the other, and a cover carried by
the card and slidable by hand between at least first and second
positions with respect to the card, the first set of contacts being
covered when the cover is in the first position and exposed for
insertion into the first mating receptacle when the cover is in the
second position; wherein the cover is in the shape of a standard
memory card and the second set of contacts is covered when the
cover is in the second position.
2. A memory card system according to claim 1, wherein the first set
of contacts has a contact pattern that follows a USB standard,
wherein the system is arranged to transfer data through the first
set of contacts using a signal protocol according to USB
standard.
3. A memory card system according to claim 2, wherein the second
set of contacts has a contact pattern that follows a memory card
standard, wherein the system is arranged to transfer data through
the second set of contacts using a signal protocol according to
said memory card standard.
4. A memory card system according to claim 3, wherein the memory
card standard is a SD card standard.
5. A memory system according to claim 2, wherein the pattern of the
second set of contacts is arranged in accordance with a published
memory card standard.
6. A memory card system according to claim 1, wherein the second
set of contacts is also carried by an outside surface of the
card.
7. A memory card system according to claim 1, wherein the cover is
arranged to expose the second set of contacts when the cover is in
the first position.
8. A memory system according to claim 7, wherein the cover is a
sleeve and wherein the sleeve and the card have relative dimensions
so that the card fits within a footprint of the sleeve when the
sleeve is in the first position.
9. A memory system according to claim 8, wherein the sleeve
includes one or more apertures positioned to expose the second set
of contacts therethrough when the sleeve is in the first
position.
10. A memory system according to claim 8, wherein the sleeve has an
open portion of an end through which the card extends to expose the
first set of contacts outside the footprint of the sleeve when the
sleeve is in the second position.
11. A memory system according to claim 8, wherein the pattern of
the second set of contacts is arranged in accordance with the SD
card standard and the footprint of the sleeve has dimensions in
accordance with the SD card standard.
12. A memory system according to claim 9, wherein the sleeve
contains wall segments adjacent the open portion of the end that
defines the second position of the sleeve relative to the circuit
card.
13. A memory system according to claim 12, wherein the first and
second sets of contacts are positioned on a common side of the
circuit card, and wherein the sleeve includes an open region
adjacent the end containing the open portion that exposes a portion
of an opposite side of the circuit card.
14. A memory system according to claim 9, wherein an end of the
sleeve opposite to the end containing the open portion includes a
stop that defines the first position of the sleeve relative to the
circuit card.
15. A memory card system according to claim 1, wherein the cover is
a sleeve and wherein substantially all of the card is positioned
within the sleeve when the card is in the first position.
16. A memory card system according to claim 15, wherein the second
set of contacts is arranged along an edge of the card.
17. A memory card system according to claim 15, wherein the sleeve
and the card in the first position together have a size and shape
substantially according to the published standard of the Secure
Digital memory card.
18. A memory card system according to claim 15, wherein a thickness
of the card in a surface portion containing the first set of
contacts is greater than a thickness of the card in a portion
containing the second set of contacts.
19. A memory card system according to claim 18, wherein the portion
having the first set of contacts is rigidly connected to the
portion having the second set of contacts.
20. A memory card system according to claim 19, wherein the outside
surfaces of the portions having the first and second sets of
contacts are parts of a planar surface on the common side of the
card.
21. A memory card system according to claim 15, wherein the first
and second sets of contacts are positioned on one side of the card
on a common planar surface.
22. A memory card system according to claim 9, wherein the sleeve
further includes a resilient sidewall portion with a lip positioned
at the end opening of the sleeve that engages an end of the card
when the card is in the first position with the sleeve and holds
the card in the first position.
23. A memory card system according to claim 1, wherein the first
and second sets of contacts follow respective first and second
different published standards.
24. A memory card system according to claim 1, wherein the surface
portion of the card containing the first set of contacts is a
rectangle having a width less than that of other portions of the
card.
25. A memory card system according to claim 1, wherein the cover is
a rectangular shaped sleeve having a third set of contacts along a
first edge thereof with a pattern according to a published memory
card standard and an opening along a second edge thereof opposite
to the first edge; wherein the card is shaped for a first end to be
inserted in to the sleeve through the opening thereof to abut a
physical stop within the sleeve, wherein a portion of the card
extends out of the opening of the sleeve with a shape and the first
set of contacts according to a USB plug standard, mating contacts
arranged within the sleeve to connect the second set of contacts of
the card with the third set of contacts when the card is inserted
into the sleeve with the first end of the card abutting the
physical stop within the sleeve, wherein the electronic circuits
within the card are arranged to control the operation of the card
through the matting contacts according to the published card
standard and through the first set of contacts according to the USB
standard.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This application is a continuation of application Ser. No.
11/536,974, filed on Sep. 29, 2006, which is a continuation of
application Ser. No. 10/826,801, filed on Apr. 16, 2004, now U.S.
Pat. No. 7,152,801. These applications are related to a
non-provisional patent application entitled "Memory Card With Two
Standard Sets of Contacts and a Hinged Contact Covering Mechanism,"
filed Apr. 16, 2004, application Ser. No. 10/826,796, by Robert C.
Miller et al., which applications are incorporated herein in their
entirety by this reference.
FIELD OF THE INVENTION
[0002] This invention relates generally to the use and structure of
removable electronic circuit cards having different mechanical
and/or electrical interfaces, particularly those including mass
re-programmable non-volatile integrated circuit memory.
BACKGROUND OF THE INVENTION
[0003] Electronic circuit cards, including non-volatile memory
cards, have been commercially implemented according to a number of
well-known standards. Memory cards are used with personal
computers, cellular telephones, personal digital assistants (PDAs),
digital still cameras, digital movie cameras, portable audio
players and other host electronic devices for the storage of large
amounts of data. Such cards usually contain a re-programmable
non-volatile semiconductor memory cell array along with a
controller that controls operation of the memory cell array and
interfaces with a host to which the card connected. Several of the
same type of card may be interchanged in a host card slot designed
to accept that type of card. However, the development of the many
electronic card standards has created different types of cards that
are incompatible with each other in various degrees. A card made
according to one standard is usually not useable with a host
designed to operate with a card of another standard.
[0004] One such standard, the PC Card Standard, provides
specifications for three types of PC Cards. Originally released in
1990, the PC Card Standard now contemplates three forms of a
rectangular card measuring 85.6 mm. by 54.0 mm., having thicknesses
of 3.3 mm. (Type I), 5.0 mm. (Type II) and 10.5 mm. (Type III). An
electrical connector, which engages pins of a slot in which the
card is removably inserted, is provided along a narrow edge of the
card. PC Card slots are included in current notebook personal
computers, as well as in other host equipment, particularly
portable devices. The PC Card Standard is a product of the Personal
Computer Memory Card International Association (PCMCIA). The
current PC Card specifications, "PC Card Standard Release 8.0,"
dated April 2001, is available from the PCMCIA.
[0005] In 1994, SanDisk Corporation, assignee of the present
application, introduced the CompactFlash.TM. card (CF.TM. card)
that is functionally compatible with the PC Card but is much
smaller. The CF.TM. card is rectangularly shaped with dimensions of
42.8 mm. by 36.4 mm. and a thickness of 3.3 mm., and has a female
pin connector along one edge. The CF.TM. card is widely used with
cameras for the storage of still video data. A passive adapter card
is available, in which the CF card fits, that then can be inserted
into a PC Card slot of a host computer or other device. The
controller within the CF card operates with the card's flash memory
to provide an ATA interface at its connector. That is, a host with
which a CF card is connected interfaces with the card as if it is a
disk drive. Specifications for the CompactFlash card have been
established by the CompactFlash Association, "CF+ and CompactFlash
Specification Revision 2.0," dated May 2003. An implementation of
these specifications is described by SanDisk Corporation in a
product manual "CompactFlash Memory Card Product Manual," revision
10.1, dated September 2003.
[0006] The SmartMedia.TM. card is about one-third the size of a PC
Card, having dimensions of 45.0 mm. by 37.0 mm. and is very thin at
only 0.76 mm. thick. Contacts are provided in a defined pattern as
areas on a surface of the card. Its specifications have been
defined by the Solid State Floppy Disk Card (SSFDC) Forum, which
began in 1996. It contains flash memory, particularly of the NAND
type. The SmartMedia.TM. card is intended for use with portable
electronic devices, particularly cameras and audio devices, for
storing large amounts of data. A memory controller is included
either in the host device or in an adapter card in another format
such as one according to the PC Card standard. Physical and
electrical specifications for the SmartMedia.TM. card have been
issued by the SSFDC Forum.
[0007] Another non-volatile memory card is the MultiMediaCard
(MMC.TM.). The physical and electrical specifications for the
MMC.TM. are given in "The MultiMediaCard System Specification" that
is updated and published from time-to-time by the MultiMediaCard
Association (MMCA), including version 3.1, dated June 2001. MMC
products having varying storage capacity are currently available
from SanDisk Corporation. The MMC card is rectangularly shaped with
a size similar to that of a postage stamp. The card's dimensions
are 32.0 mm. by 24.0 mm. and 1.4 mm; thick, with a row of
electrical contacts on a surface of the card along a narrow edge
that also contains a cut-off corner. These products are described
in a "MultiMediaCard Product Manual," Revision 5.2, dated March
2003, published by SanDisk Corporation. Certain aspects of the
electrical operation of the MMC products are also described in U.S.
Pat. No. 6,279,114 and in patent application Ser. No. 09/186,064,
filed Nov. 4, 1998, now U.S. Pat. No. 6,901,457, both by applicants
Thomas N. Toombs and Micky Holtzman, and assigned to SanDisk
Corporation. The physical card structure and a method of
manufacturing it are described in U.S. Pat. No. 6,040,622, assigned
to SanDisk Corporation.
[0008] A modified version of the MMC.TM. card is the later Secure
Digital (SD) card. The SD Card has the same rectangular size as the
MMC.TM. card but with an increased thickness (2.1 mm.) in order to
accommodate an additional memory chip when that is desired. A
primary difference between these two cards is the inclusion in the
SD card of security features for its use to store proprietary data
such as that of music. Another difference between them is that the
SD Card includes additional data contacts in order to enable faster
data transfer between the card and a host. The other contacts of
the SD Card are the same as those of the MMC.TM. card in order that
sockets designed to accept the SD Card can also be made to accept
the MMC.TM. card. A total of nine contacts are positioned along a
short edge of the card that contains a cutoff corner. This is
described in patent application Ser. No. 09/641,023, filed by Cedar
et al. on Aug. 17, 2000, International Publication Number WO
02/15020, now U.S. Pat. No. 6,820,148. The electrical interface
with the SD card is further made to be, for the most part, backward
compatible with the MMC.TM. card, in order that few changes to the
operation of the host need be made in order to accommodate both
types of cards. Complete specifications for the SD card are
available to member companies from the SD Association (SDA). A
public document describing the physical and some electrical
characteristics of the SD Card is available from the SDA:
"Simplified Version of: Part 1 Physical Layer Specification Version
1.01," dated Apr. 15, 2001.
[0009] More recently, a miniSD card has been specified by the SDA
and is commercially available. This card is smaller than the SD
card but provides much of the same functionality. It has a modified
rectangular shape with dimensions of 21.5 mm. long, 20.0 mm. wide
and 1.4 mm. thick. A total of eleven electrical contacts are
positioned in a row on a surface of the card along one edge. The
miniSD memory card is available from SanDisk Corporation and
described in the "SanDisk miniSD Card Product Manual," version 1.0,
April 2003.
[0010] Another type of memory card is the Subscriber Identity
Module (SIM), the specifications of which are published by the
European Telecommunications Standards Institute (ETSI). A portion
of these specifications appear as GSM 11.11, a recent version being
technical specification ETSI TS 100 977 V8.3.0 (2000-08), entitled
"Digital Cellular Telecommunications System (Phase 2+);
Specification of the Subscriber Identity Module--Mobile Equipment
(SIM--ME) Interface," (GSM 11.11 Version 8.3.0 Release 1999). Two
types of SIM cards are specified: ID-1 SIM and Plug-in SIM.
[0011] The ID-1 SIM card has a format and layout according to the
ISO/IEC 7810 and 7816 standards of the International Organization
for Standardization (ISO) and the International Electrotechnical
Commission (IEC). The ISO/IEC 7810 standard is entitled
"Identification cards--Physical characteristics," second edition,
August 1995. The ISO/IEC 7816 standard has the general title of
"Identification cards--Integrated Circuit(s) Cards with Contacts,"
and consists of parts 1-10 that carry individual dates from 1994
through 2000. Copies of these standards are available from the
ISO/IEC in Geneva, Switzerland. The ID-1 SIM card is generally the
size of a credit card, having dimensions of 85.60 mm. by 53.98 mm.,
with rounder corners, and a thickness of 0.76 mm. Such a card may
have only memory or may also include a microprocessor, the latter
often being referred to as a "Smart Card." One application of a
Smart Card is as a debit card where an initial credit balance is
decreased every time it is used to purchase a product or a
service.
[0012] The Plug-in SIM is a very small card, smaller than the
MMC.TM. and SD cards. The GSM 11.11 specification referenced above
calls for this card to be a rectangle 25 mm. by 15 mm., with one
corner cut off for orientation, and with the same thickness as the
ID-1 SIM card. A primary use of the Plug-in SIM card is in mobile
telephones and other devices for security against the theft and/or
unauthorized use of the devices, in which case the card stores a
security code personal to the device's owner or user. In both types
of SIM cards, eight electrical contacts (but with as few as five
being used) are specified in the ISO/IEC 7816 standard to be
arranged on a surface of the card for contact by a host
receptacle.
[0013] Sony Corporation has developed and commercialized a
non-volatile memory card, sold as the Memory Stick.TM., that has
yet another set of specifications. Its shape is that of an
elongated rectangle having 10 electrical contacts in a row and
individually recessed into a surface adjacent one of its short
sides that also contains a cut out corner for orientation. The
card's size is 50.0 mm. long by 21.5 mm. wide by 2.8 mm. thick.
[0014] A more recent Memory Stick Duo card is smaller, having
dimensions of 31.0 mm. long by 20.0 mm. wide by 1.6 mm. thick. Ten
contacts are provided in a common recess in a surface and along a
short side of the card, which also contains an orienting notch.
This smaller card is often used by insertion into a passive adapter
having the shape of a Memory Stick card.
[0015] SanDisk Corporation has introduced an even smaller
transportable non-volatile TransFlash memory module in a modified
rectangular shape, having dimensions of 15.0 mm. long by 11.0 mm.
wide by 1.0 mm. thick. Eight electrical contact pads are provided
in a row on a surface adjacent a short edge of the card. This card
is useful for a variety of applications, particularly with portable
devices, and is being incorporated into multimedia camera cell
telephones.
[0016] As is apparent from the foregoing summary of the primary
electronic card standards, there are many differences in their
physical characteristics including size and shape, in the number,
arrangement and structure of electrical contacts and in the
electrical interface with a host system through those contacts when
the card is connected with a host. Electronic devices that use
electronic cards are usually made to work with only one type of
card. Adaptors, both active and passive types, have been provided
or proposed to allow some degree of interchangeability of
electronic cards among such host devices. U.S. Pat. No. 6,266,724
of Harari et al. describes use of combinations of mother and
daughter memory cards.
[0017] Small, hand-held re-programmable non-volatile memories have
also been made to interface with a computer or other type of host
through a Universal Serial Bus (USB) connector. These are
especially convenient for users who have one or more USB connectors
available on the front of their personal computers, particularly if
a receptacle slot for one of the above identified memory cards is
not present. Such devices are also very useful for transferring
data between various host systems that have USB receptacles,
including portable devices. Mechanical and electrical details of
the USB interface are provided by the "Universal Serial Bus
Specification," revision 2.0, dated Apr. 27, 2000. There are
several USB flash drive products commercially available from
SanDisk Corporation under its trademark Cruzer. USB flash drives
are typically larger and shaped differently than the memory cards
described above.
[0018] Another, higher transfer rate interface that has become
commonplace on personal computers and other host devices is
specified by the following standard of the Institute of Electrical
and Electronics Engineers (IEEE): "IEEE Standard for a High
Performance Serial Bus," document no. IEEE 1394--1995, as amended
by document nos. IEEE 1394a--2000 and IEEE 1394--2002. A common
commercial form of this bus interface is known as FireWire. Because
of its higher speed, this interface is particularly useful for the
transfer of large amounts of data to and from a computing
device.
SUMMARY OF THE INVENTION
[0019] In order to provide a portable non-volatile memory that is
connectable directly with various types of host devices that
include receptacles having various physical and electronic signal
protocol and format characteristics, two or more external sets of
electrical contacts are provided on a memory card system that
conform to different recognized mechanical and electrical standards
and specifications. The internal memory of the card system, most
commonly flash memory, is operable through any of the sets of
contacts alone with the appropriate signal protocol. The standards
that are implemented are preferably those that will allow the
system to be used directly with a wide variety of host devices. Two
sets of such contacts are most conveniently provided in a single
card system.
[0020] The example memory card systems described herein utilize one
set of contacts and a signal protocol from one published memory
card standard, such as that for the SD card, and the other set of
contacts and a signal protocol according another published
standard, such as the USB standard or another that provide similar
opportunities for use, such as the IEEE 1394 standard. Many types
of hosts include receptacle slots for SD cards, particularly cell
phones, PDAs, MP-3 players, cameras and the like, while USB
receptacles are common in personal computers, notebook computers
and the like. Such a combination of interfaces thereby allows the
memory card system to be used directly with a wider variety of host
devices than either one alone.
[0021] One form of the memory card system is a standard unitary
memory card with a second set of contacts added, either with or
without an extension of the card. Another provides a sleeve in the
shape of a standard memory card with an internal portion being
extendable by hand to expose the second set of contacts. Yet
another in the shape of a standard memory card allows a portion of
its cover to be moved by hand to expose the second set of contacts
for use. A further specific memory card system uses an outer sleeve
that is slid by hand between extreme positions to expose one of two
sets of contacts while covering the other. Another form of the
memory card system includes a shell in the shape of one standard
memory card with an internal memory card unit containing the second
set of contacts and being insertable into the shell to enable the
standard memory card function.
[0022] Additional aspects, advantages, features and details of the
various aspects of the present invention are included in the
following description of exemplary examples thereof, which
description should be taken in conjunction with the accompanying
drawings. All patents, patent applications, articles, manuals,
standards, specifications and other publications referenced herein
are hereby incorporated herein by this reference in their entirety
for all purposes.
BRIEF DESCRIPTION OF THE DRAWINGS
[0023] FIGS. 1A and 1B show front and side views, respectively, of
a first embodiment of a memory card having two sets of electrical
contacts that conform with different industry specifications;
[0024] FIG. 2 is an electronic block diagram of the memory system
within the card of FIGS. 1A and 1B;
[0025] FIG. 3 illustrates use of the card of FIGS. 1A, 1B and 2
with different types of electronic equipment;
[0026] FIGS. 4A and 4B show front and side views, respectively, of
a second embodiment of a memory card having two sets of electrical
contacts that conform with different industry specifications;
[0027] FIGS. 5A-5C show a third memory card embodiment utilizing a
memory card insert and a surrounding sleeve, FIG. 5A showing the
memory card outside of the sleeve, FIG. 5B showing the memory card
positioned within the sleeve and FIG. 5C showing a side view of the
card and sleeve of FIG. 5B;
[0028] FIGS. 6A-6C show a fourth memory card embodiment utilizing a
memory card insert and a surrounding sleeve, FIG. 6A showing the
memory card outside of the sleeve, FIG. 6B showing the memory card
positioned within the sleeve and FIG. 6C showing a side view of the
card and sleeve of FIG. 6B;
[0029] FIG. 7 illustrates, in a fifth embodiment, a variation of
the memory card and sleeve of the fourth embodiment of FIGS.
6A-6C;
[0030] FIG. 8 shows an alternate structure for a portion of the
foregoing memory card embodiments;
[0031] FIG. 9A shows a sixth memory card embodiment with one form
of sleeve in place on the card in a protective position, and FIGS.
9B-9E illustrate four alternate versions of the sleeve of FIG. 9A
when moved out of its protective position;
[0032] FIGS. 10A and 10B show a seventh memory card embodiment
wherein a memory card is moveable between two positions with
respect to a sleeve in which it is captured, the sleeve containing
one set of contacts and the card insert the other, the two
positions being shown in FIGS. 10A and 10B;
[0033] FIGS. 11A and 11B show an eighth memory card embodiment
wherein a memory card is moveable between two positions with
respect to a sleeve in which it is captured in order to expose one
or the other of two sets of contacts on the card insert; and
[0034] FIGS. 12A-12B illustrate a specific structure for
implementing the eighth memory card embodiment shown generally in
FIGS. 11A and 11B, FIGS. 12A and 12B showing respective front and
rear views of the structure when the card is fully inserted into
the sleeve and FIGS. 12C and 12D showing respective front and rear
views of the structure when the card extends out of the sleeve.
DESCRIPTION OF EXEMPLARY EMBODIMENTS
[0035] Referring to FIG. 1A, a standard memory card 11, in this
case the SD card, has an extension 13 formed as part of the card to
provide an additional interface, in this case a USB compatible
plug. According to the SD Memory Card Specifications, nine
electrical contacts 15-23 are provided on bottom surfaces of
grooves 25-32, the two contacts 22 and 23 being placed in the one
groove 32. The card is 24 mm. by 32 mm. in size with a thickness 35
of 2.1 mm. (see the side view of FIG. 1B).
[0036] In order to be compatible with the USB specifications, the
addition 13 has a minimum length of 12 mm. from an end 12 of the SD
card portion and has a width of 12.35 mm. Four electrical contacts
37-40 according to the USB specifications are provided on the flat
surface of the extension 13. Both sets of contacts 15-23 and 37-40
are positioned on the same side of the memory system card of FIG.
1A. The extension 13 has a thickness 43 of 1.70 mm. in the region
of the contacts 37-40, which is less than that of the SD card
portion 11. The thickness of the extension 13 is maintained within
the extremities of the SD card portion, for a distance of at least
2 mm. from the edge 12 in a region 45 (FIG. 1A), so that it does
not interfere with insertion of the structure into SD card slots
that have a push-push connector, which requires pushing the card
further into the slot than normal in order to release it for
removal. The surrounding shield of the flat extension 13 that is
part of the USB specification has been omitted.
[0037] Various of these details of the structure of FIGS. 1A and 1B
can certainly be changed so long as the contact structure at one
end physically conforms to one standard and the contact structure
at the other end physically conforms to a second standard. One is a
memory card standard since numerous hand held devices include
receptacles for such cards. A memory card standard other than for
the SD card, such as one of the others described above, can be
utilized instead. The second standard is one that is more commonly
used on personal computers, notebook computers and other computing
devices, in this case the USB standard. The IEEE 1394 standard
could instead be used for the second standard, for example, but its
use is currently not as widespread as the USB. Alternatively, both
sets of contacts may conform to different memory card standards. A
third or more sets of contacts according to yet one or more other
standards could also be added but it may usually not be practical
to do so with such a small card system. And when a memory card
includes a set of SD memory card contacts, as does the card of
FIGS. 1A-B, the card can also be accessed by a host through these
contacts as a MMC card because of the relationship between the SD
and MMC card specifications. This memory within this card is
therefore accessible through either of two physical sets of
external electrical contacts with any one of three signal
formats.
[0038] The electronic block diagram of FIG. 2 shows generally an
example of the electronic system within the structure of FIGS. 1A
and 1B. Flash memory 47 is accessed from the SD card contacts 15-23
through a controller circuit 49, as currently exists in SD memory
cards. What is added is an interface circuit 51 for converting the
SD signal protocols at the SD contacts 15-23 into USB signal
protocols at the USB contacts 37-40. Alternatively, a single
controller can be used in place of the circuits 49 and 51 to
provide both signal protocols. If one or more additional sets of
contacts are provided, provision is made to interface the
additional set(s) of contacts with the signal protocols of the
additional standard(s).
[0039] Because of the two interfaces, the resulting memory system
of FIGS. 1A, 1B and 2 is useable with a wide variety of types of
host devices. This is illustrated in FIG. 3. One set of contacts of
such a memory card 53 can be inserted into a memory card slot of a
PDA 55, and the other set of contacts into a USB receptacle of a
notebook computer 57. Addition of the second interface increases
the convenience and portability of the memory card. This is an
advantage for most all uses of memory cards but is of particular
benefit in certain applications. For example, if the card 53 stores
the medical history and other health information of an individual
who is carrying the card at the time of an accident or sudden
illness, it is more likely that emergency health care providers
will have access to a host device that can immediately read the
stored information from the card through either of the two
interfaces. The two interfaces also increase the usefulness of a
memory card for transferring data between different types of hosts.
For example, data can be transferred by the card 53 of FIG. 3
between the PDA 55 and the computer 57, even though these hosts do
not have a common card interface.
[0040] The second pattern of contacts can be added to most any
standard memory card. Another example is given in FIGS. 4A and 4B,
respective front and side views of a miniSD card 14 with the USB
connector portion 13 added. The miniSD card has eleven electrical
contacts 46 mounted along one edge on a surface portion that is
slightly depressed from the front card surface. Only nine of these
contacts are currently used, the same number and with the same
functions as the SD memory card. A thickness 42 specified for the
miniSD card is 1.4 mm., smaller than the 1.70 mm. thickness 43 of
the USB plug extension.
[0041] A variation of the structure of the card described with
respect to FIGS. 1A-3, but with the same functionality and
advantages, is illustrated in FIGS. 5A-5C. Instead of a single
unitary card structure, a unitary card 61 is inserted into a sleeve
63. Elements that are the same or functionally the same as those of
the earlier figures are given the same reference numbers. The
memory card 61 includes both the memory card contacts 15-23 and the
USB contacts 37-40 on a common planar surface of a unitary piece,
such as results from injection molding. In plan view, the card 61
has the same dimensions as the card of FIG. 1A except that its
wider portion is made to be somewhat narrower than the portion of
the card of FIG. 1A so that it can be inserted into the sleeve 63
that has outer dimensions conforming to the SD card standard. The
card 61 is shown to be so inserted into the sleeve 63 in FIG. 5B.
The sleeve 63 includes the openings 25-32 at an otherwise closed
end through which the contacts 15-23 are accessible when the card
61 is inserted into the sleeve 63, as shown in FIG. 5B. The sleeve
63 also contains an opening at its end opposite the openings 25-32,
through which the card 61 is inserted and removed. When the card
61, which contains the memory and interface circuits of FIG. 2, is
to be inserted into a SD memory card receptacle, it is first
inserted into the sleeve 63, as shown in FIG. 5B. The end of the
combination containing the contacts 15-23 is inserted into the SD
memory card slot. When the card 61 is to be inserted into a USB
receptacle, this can be done with or without the sleeve 63 in
place.
[0042] The thicknesses of the card 61 and the sleeve 63 relative to
each other are shown in the side view of FIG. 5C. An outside
thickness 65 of the sleeve 63 conforms to the memory card
specifications, in this case that of the SD card, namely 2.1 mm. In
order to fit within the sleeve 63, at least the portion of the card
61 that fits within the sleeve, most of the card, is made to have a
thickness 67 that is about equal to or less than the inside
dimension of the sleeve. The card 61 is then easily inserted into
the sleeve 63 and removed from it by hand. A thickness that
provides a somewhat tight fit between the two holds them together
so that they do not easily separate. Alternatively, a push-push
connector (not shown) may be included in the sleeve to positively
hold them together but releasing the card in response to the card
being pushed a distance into the sleeve. As a further alternative,
a detent mechanism (not shown), such as small indentations on
opposite sides of the memory card 61 and cooperatively shaped and
positioned bumps on the inside of the sidewalls of the sleeve 63,
can alternatively be employed. The detent is engaged and disengaged
by sufficient hand force when inserting the card 61 into, or
removing it from, the sleeve 63. With use of a push-push, detent or
other positive holding mechanism, the memory card thickness 67 can
be made as small as the memory card technology allows, such as 1
mm., since the relative thicknesses of the card 61 and sleeve 63
need not be controlled to hold the two together. Front and rear
walls of the sleeve 63 are preferably planar, except for the area
including the openings 25-32. Similarly, the card 61 preferably has
parallel planar front and rear surfaces except for the region of
the second set of contacts 37-40, where the thickness is made to
conform to the specifications for those contacts. In the case of a
USB connector, the dimensions of the extension containing the
contacts 37-40 are as described for the extension 13 of FIGS. 1A
and 1B, the thickness 69 being 1.70 mm.
[0043] A card having a contact pattern other than that of the SD
card may alternately be used with a separate sleeve, following that
of FIGS. 5A-C. The Memory Stick memory card is particularly
adaptable to separation into an inner card and outer sleeve since
it, as does the SD card, utilizes slots along a narrow edge in
which the exposed electrical contacts are recessed. For other
memory cards that do not have their contacts recessed, the sleeve
is added with, of course, openings through one wall over the
contacts of the inner card when fully inserted.
[0044] A modification of the memory system of FIGS. 5A, SB and 5C
is illustrated in respective FIGS. 6A, 6B and 6C. Instead of the
memory card containing the contacts that become accessible though
openings in the sleeve when the card is inserted into it, a
cooperatively shaped sleeve 71 and card 73 have sets 75-83 and
85-93 of contacts, respectively, that make electrical contact when
the card is inserted into the sleeve. The memory card contacts
15-23 are attached to the sleeve 71. A small printed circuit board
is positioned within the sleeve, attached to an inner side of its
top surface, that contains contacts 75-83 facing downward into the
sleeve and including conductive traces (shown as dashed lines)
connecting each of these contacts with a respective one of the
memory card contacts 15-23. When the card 73, which is shorter than
the card 61 of FIG. 5A, is inserted into the sleeve 71, the card
contacts 85-93 make physical contact with respective ones of the
sleeve contacts 75-83. The positioning of these contacts need not
follow any particular card standard.
[0045] FIG. 7 shows a variation of the embodiment of FIGS. 6A-C.
Instead of the inserted card 73 configured as shown in FIGS. 6A-C,
the card of FIGS. 4A-B is used as the insert. A sleeve 71* is
similar to the sleeve 71, the primary difference being that the
internal contacts for contacting an inserted card are positioned in
the pattern of the miniSD card contacts 46. When the memory card is
inserted into the sleeve 71*, each of the nine active miniSD card
contacts 46 is electrically connected within the sleeve 71* with an
appropriate one of the SD card contacts 15-23. As with the card 73,
the card insert of FIG. 7 is removable from the sleeve 73*.
[0046] Although the examples of FIGS. 6A-C and 7 utilize a shell
and its contacts that conform to the SD memory card specifications,
they could follow another of the memory card standards instead. Use
of the Memory Stick or miniSD standards are among the
possibilities.
[0047] A possible modification to the USB connector portion of the
embodiments of FIGS. 1A-B, 4A-B, 5A-C, 6A-C and 7 is illustrated in
FIG. 8. Rather than just providing a connector with a planar shape,
one or both rails 97 and 99 are added as a key to prevent the plug
from being inserted into a USB receptacle up side down and thus
fail to make electrical contact. When properly inserted, the rails
97 and 99 fit on opposite sides of a substrate in the USB
receptacle that carries the contacts. If inverted, the plug of FIG.
8 will not fit into the USB receptacle. Since the rails 97 and 99
are normally too thick to fit into the usual memory card receptacle
slot, they positioned a distance 101 (such as 2.0 mm. or more) from
an edge of the memory card to which the plug is attached so that
they do not limit pushing the card further into the memory card
slot to release it from a push-push connector.
[0048] FIGS. 9A-9E illustrate several variations of another
embodiment of the memory card system. Rather than extending the
dimensions of a standard memory card to accommodate the second
connector, the entire structure is maintained within the footprint
of the standard memory card. FIG. 9A shows the combination within
the outer 24 mm. by 32 mm. dimensions of the SD card, as an
example. A cap 103, which is removable and re-attachable by a hand
operated frictional fit, protects the USB contacts 37-40 when the
unit is being used as a SD memory card. The cap 103 may be closed
at its exposed end but is open at the end into which the USB
connector plug is inserted. The view FIG. 9B shows the structure
with this cap removed. In the configuration of FIG. 9A, the unit
appears and is used like any standard SD memory card. When the cap
103 is removed (FIG. 9B), the unit may be inserted into a USB
receptacle. The amount of space devoted to the memory and other
integrated circuits is, of course, reduced since the USB connector
occupies a portion of the length of the standard SD card instead.
Otherwise, the structure is as described with respect to FIGS.
1A-B. Or the memory card may be a separate piece that fits within a
sleeve, according to the embodiment of FIGS. 5A-C. The separate
memory card and sleeve may, as a further alternative, contain
mating electrical contacts in the manner of the embodiment of FIGS.
6A-C.
[0049] Since the removable cap 103 could become lost in use, it is
preferable to retain an attachment between it and at least the
outer shell or sleeve of the unit when the USB connector is being
used. FIG. 9C illustrates one way to do this with a slideable cover
103'. The exposed end of the cap 103 (FIG. 9A) is opened to form
the cover 103' that is slid by hand between the position shown in
FIG. 9C, wherein the USB connector is exposed for use, and a second
position where the cover 103' overlies the USB contacts 37-40, as
is shown for the cap 103 in FIG. 9A.
[0050] Another manner of attachment is illustrated in FIG. 9D,
where a cap 103'' is attached by a hinge 105 to the main card body
at its end from which the extension containing the contacts 37-40
extends. This allows the cap 103'' to be swung out of the way when
the card is to be inserted into a USB receptacle, the position
shown in FIG. 9D. When pivoted 180 degrees about the hinge 105 by
hand in a counterclockwise direction, the unit will appear as shown
in FIG. 9A. The rotation occurs about an axis that is perpendicular
to the broad surfaces of the card. In a variation on the structure
of FIG. 9D, the cap is split into two portions that are separately
pivoted about respective hinges 105 and 107.
[0051] Rather than having a portion of the outer shell or sleeve
that is moved out of the way of the USB connector, as illustrated
in FIGS. 9A-E, a shell with the shape of a standard memory card may
have a memory card retained therein that is moveable by hand
between two extreme positions with respect to the shell. In one
position, the memory card is totally within the shell to enable the
unit to be used as a memory card, and in the other position the
card is slid along the shell to extend the USB connector out of the
shell to enable insertion into a USB receptacle. Two alternate ways
of accomplishing this are shown in FIGS. 10A-B and 11A-B.
[0052] The implementation of FIGS. 10A-B is like that described
above with respect to FIGS. 6A-C, except that an internal card 73'
is made shorter than the card 73 in order to fit entirely within a
shell 71' in one position (FIG. 10A) and to be retained within the
shell 71' by a mechanical stop at its end through which the second
connector extends when the card is slid along the shell into the
second position (FIG. 10B). This mechanical stop can be provided by
restricting the size of the end opening in the shell to allow the
second connector extension to pass through while being too small
for the wider main portion of the memory card to pass. A portion of
the backside of the shell 71' adjacent this end may optionally be
removed (not shown) for a distance from the end in order to
facilitate moving and/or holding of the card by hand. The card 73'
can be prevented from moving back into the shell 71' from the
position shown in FIG. 10B by use of an internal detent mechanism
(not shown) that can be overridden by hand when the user desires to
move the card 73' back into the shell 71'. The SD memory card and
USB specifications are also implemented in this example but, as
with the other examples, is not limited to this particular
combination.
[0053] Similarly, the memory card system of FIGS. 11A-B is like
that described with respect to FIGS. 5A-C, except that an internal
card 61' is made shorter than the card 61 in order to fit entirely
within a shell 63' in one position (FIG. 11A) and to be retained
within the shell 63' by a mechanical stop at its end through which
the second connector extends when the card is slid along the shell
into the second position (FIG. 11B). The shell 63', in this
example, also has outer dimensions according to the SD memory card
standard and the second set of contacts shown on the card follow
the USB standard. Appropriate mechanical techniques may be used to
retain the card 61' in the two extreme positions of FIGS. 11A and
11B but allow this retention to be overcome by hand to slide the
shell 63' with respect to the card 61'.
[0054] In the two examples of FIGS. 10A-B and 11A-B, the shell is
slid with respect to the internal memory card to expose one of the
sets of contacts while covering and protecting the other. As with
the other embodiments described herein, a single side of the
internal memory card carries the two sets of external electrical
contacts for convenience but the two sets could be positioned on
opposite sides of the card if there was a reason to do so.
[0055] FIGS. 12A-D show perspective views of a more detailed
implementation of the embodiment of FIGS. 11A-B. A shell 111 having
an external shape and other physical characteristics of a memory
card according to the SD card standard has a memory card 113
contained within it. In FIGS. 12A-B, the card 113 is shown fully
inserted into the shell. A lip 115 at the end of a resilient wall
portion 117 holds the card 113 in place. Contacts 15-23 on the card
113 are, in this position, accessible through openings 25-32 of the
shell 111. The signals at the contacts 15-23 are according to the
SD memory card specifications. The unit can be inserted into a SD
memory card receptacle of a host or other device that may be
connected to a host, the end containing the contacts 15-23 being
inserted first.
[0056] In FIGS. 12C-D, the memory card 113 has been withdrawn from
the shell 111 to expose the USB connector plug and its contacts
37-40. At the same time, the other set of contacts 15-23 has been
withdrawn into the sleeve and are thereby covered by it. The card
113 is released from the shell 111 by flexing the resilient wall
portion 117 by hand away from the card to remove the lip 115 from
its path. When removed, the card 113 is prevented from being
separated from the shell 111 by tabs 119 and 121 on the end of the
shell. Removal of the relatively narrow USB connector plug from the
shell 111 is stopped when the wider portion of the card 113 abuts
the shell tabs 119 and 121, as best seen from FIG. 12D. A portion
of the backside of the shell 111 adjacent this end may be removed,
as shown, in order to facilitate manipulation of the card 113 by
hand. An internal detent mechanism (not shown) can be used to
prevent the card 113 from inadvertently moving back into the shell
111. The user overcomes this retention when pushing the card 113
back into the shell 111. Alternatively, the card 113 can be held by
hand in its extended position by the user gripping it through the
backside opening of the shell 111 when inserting the extended USB
plug into a USB receptacle.
[0057] Although the examples of FIGS. 11A-B and 12A-C utilize a
shell and its contacts that conform to the SD memory card
specifications, they could follow another of the memory card
standards instead. Use of the Memory Stick or miniSD standards are
among the possibilities. And although these examples show that the
second set of contacts follows the USB specifications, another
standard memory card or other data transfer interface could be used
instead.
[0058] Although the various aspects of the present invention have
been described with respect to several exemplary embodiments and
variations thereof, it will be understood that the invention is
entitled to protection within the full scope of the appended
claims.
* * * * *