Patent Application
20070188302
None.
The present invention relates generally to an electronic information system. More particularly, the present invention relates to an electronic key system comprising an electrical/electronic key-like device and a key receptacle.
Electronic key systems have been used in many applications and have proven to be a source for portable data solutions. For example, electronic key systems have been used in data logging applications wherein a portable electrical/electronic key-like device stores user and/or other information for transport of data to/from a remote station; in access control applications where a portable key-like device stores information to be verified by an access control program or system; in cashless vending or cash token applications wherein a portable electrical/electronic key-like device stores a value (e.g. cash value or number of credits, etc.) that is decremented after vending a product or being served, and can be recharged with additional value; and in security applications wherein a portable electrical/electronic key-like device stores personal identification information that is valid only when the electrical/electronic key-like device is being used by the owner or authorized personnel of the electrical/electronic key-like device.
Prior electronic key systems include an electrical/electronic key-like device and an electrical key receptacle as disclosed in U.S. Pat. No. 4,752,679, entitled “RECEPTACLE DEVICE”, issued on Jun. 21, 1988; U.S. Pat. No. 4,659,915, entitled “RECEPTACLE DESIGN FOR USE WITH ELECTRONIC KEY-LIKE DEVICE”, issued on Apr. 21, 1987; U.S. Pat. No. 4,522,456, entitled “ELECTRONIC TAG RECEPTACLE AND READER”, issued on Jun. 11, 1985; U.S. Pat. No. 4,620,088, entitled “RECEPTACLE DESIGN FOR USE WITH ELECTRONIC KEY-LIKE DEVICE”, issued on Oct. 28, 1986; U.S. Design Patent No. Des. 345,686, entitled “ELECTRICAL INFORMATION KEY”, issued on Apr. 5, 1994; U.S. Pat. No. 4,578,573, entitled “PORTABLE ELECTRONIC INFORMATION DEVICES AND METHOD OF MANUFACTURE”, issued on Mar. 25, 1986; U.S. Pat. No. 4,549,076, entitled “ORIENTATION GUIDE ARRANGEMENT FOR ELECTRONIC KEY AND RECEPTACLE COMBINATION”, issued on Oct. 22, 1985; U.S. Pat. No. 4,436,993, entitled “ELECTRONIC KEY”, issued on Mar. 13, 1984; U.S. Pat. No. 5,073,703, entitled “APPARATUS FOR ENCODING ELECTRICAL IDENTIFICATION DEVICES BY MEANS OF SELECTIVELY FUSIBLE LINKS”, issued on Dec. 17, 1991; U.S. Design Patent No. Des. 291,897, entitled “IDENTIFICATION TAG”, issued on Sep. 15, 1987; U.S. Pat. No. 4,326,125, entitled “MICROELECTRONIC MEMORY KEY WITH RECEPTACLE AND SYSTEMS THEREFOR”, issued on Apr. 20, 1982; and U.S. Pat. No. 4,297,569, entitled “MICROELECTRONIC MEMORY KEY WITH RECEPTACLE AND SYSTEMS THEREFOR”, issued on Oct. 27, 1981; all of which are assigned to Datakey Electronics, Inc., the assignee of the present application, and all of which are incorporated herein by reference.
The above referenced electronic key systems disclose electrical/electronic key-like devices and receptacles. In general, an outside circuit or electrical operation system is activated by use of a portable key-like device which is inserted into a receptacle or the like, to make electrical contact or connection with the outside circuit or the electrical operation system. Such electrical contact or connection is generally made by rotating a key-like device after the device is fully inserted into a receptacle, whereby a plurality of spring contact pins of the receptacle mate with contacts of the key-like device. Electrical pathways or wires/traces in the receptacle electrically connect the spring contact pins to an interface of the receptacle. The interface carries electrical signals from the key-like device to the outside circuit or electrical operation system.
It has been noted that the contacts of the key-like device and the receptacle are subject to wear and tear not only because of the mechanical contact, but also because the contacts of a key-like device are exposed to an outside environment without protection. Therefore, it is desirable to have a contactless electronic key system.
Further, it is desirable to have a receptacle that is capable of receiving contactless or both contact and contactless key-like devices. Also, it is desirable to have an intelligent receptacle which is capable of performing a transaction between the key-like device and the receptacle, for example, providing embedded functional applications using a key-like device and providing an interface between the key-like device and an outside operation system.
Accordingly, there is a need for an improved electronic key system.
To solve the above and the other problems, in one embodiment, the present invention provides an electronic key system comprising a key-like device and an intelligent receptacle. In some embodiments, the key may be a contactless key; and in other embodiments, the key may be a contact key. For a contactless key-like device, the contacts are within or covered by a housing or enclosure which eliminates the problem of exposure of contacts to an outside environment. The intelligent receptacle of the present invention is capable of receiving both contact and contactless key-like devices. Also, in some embodiments, the intelligent receptacle of the present invention includes a circuit for embedded functional applications and an interface between the key-like device and an external operation system.
In one embodiment of the present invention, an electronic key system comprises an electrical/electronic key-like device; and a key receptacle for receiving the electrical/electronic key-like device. The key receptacle includes a housing having an opening configured and arranged to receive the electrical/electronic key-like device, the opening having an inside end and an outside end; a circuit mounted in the housing, the circuit having at least one electrical trace and at least one embedded application operable with the electrical/electronic key-like device; and in the case of contactless, a transceiver antenna member disposed proximate the inside end of the opening or a suitable position along the opening.
In one embodiment, the electrical/electronic key-like device is a contactless electrical/electronic key-like device. The contactless electrical/electronic key-like device comprises a generally key-like enclosure having a distal end and a proximal end; a circuit disposed in and supported by the enclosure; and a magnetic coupling member disposed in the enclosure proximate the distal end of the enclosure or a suitable position inside the enclosure. In some embodiments, the enclosure is molded plastic, but other materials and suitable forming methods may be used as well. In some embodiments, the circuit and the magnetic coupling member are contained substantially or completely within the enclosure, i.e. are not exposed to an outside environment.
In one embodiment, when the key-like device is inserted into the opening, the magnetic field of the magnetic coupling member is disposed substantially orthogonal to the magnetic field of the transceiver antenna member. There is no coupling between the magnetic field, and there is no transaction between the key-like device and the key receptacle. When the key-like device is fully inserted into the receptacle and turned to a predetermined position at which the magnetic field of the magnetic coupling member and the magnetic field of the transceiver antenna member are substantially aligned with each other, the magnetic field of the magnetic coupling member is coupled to the magnetic field of the transceiver antenna member so as to enable a transaction between the circuit of the key-like device and the circuit of the key receptacle.
In some embodiments, when the key-like device is turned into a predetermined position, such as the predetermined position mentioned in the immediately proceeding paragraph, a feedback, such as a tactile, audible, or visual feedback, is generated. The key-like device is configured in a shape, such as a cylindrical shape, such that it prevents devices which do not physically “fit” from being inserted and turned into the predetermined position.
In another embodiment of the present invention, the electrical/electronic key-like device includes a key-like enclosure having a distal end and a proximal end and at least one groove disposed on each side of the enclosure between the distal end and the proximal end; a circuit disposed in and supported by the enclosure; and at least one electrical contact electrically connected to the circuit via at least one trace, the at least one electrical contact being disposed in the corresponding groove and exposed to the outside environment.
In another embodiment, the key receptacle further includes a plurality of contact pins. The contact pins make contact with the electrical contacts of the key-like device when the key-like device is fully inserted into the opening of the key receptacle and turned to a predetermined position.
The present invention further provides a method of operating an electronic key system. In one embodiment, the method includes the steps of providing an electrical/electronic key-like device, the electrical/electronic key-like device storing information and having a first circuit; inserting the electrical/electronic key-like device into a key receptacle, the key receptacle having a second circuit; moving the electrical/electronic key-like device into a predetermined position with respect to the key receptacle to enable a transaction between the first circuit of the electrical/electronic key-like device and the second circuit of the key receptacle.
In one embodiment, the transaction is a data logging operation to read/write data between the key-like device and the key receptacle for transport of data to/from a remote station.
In another embodiment, the transaction is an access control operation to verify data stored in the key-like device and provide access to an external operation system that the key receptacle is interfaced with.
In yet another embodiment, the transaction is a vending operation whereby the data stored in the key-like device is an amount of value (e.g. cash value or number of credits, etc.) and is decremented after each vending operation.
In yet an additional embodiment, the transaction is a cash token recharging operation whereby the data stored in the key-like device is increased by an amount of value.
One advantage of the present invention is that the contactless key-like device does not have contacts or other electronics exposed to the environment, and wear and tear on the contacts are thus substantially reduced.
Another advantage of the present invention is that the contactless system allows the electrical components/electronics to be sealed against corrosion, such as galvanic decay, or other hostile environments, such as salt air/spray or chemicals, etc.
A further advantage of the present invention is that the key receptacle is capable of receiving both contact and contactless types of key-like device, such that it allows for continued use of existing contact type of key-like devices.
Yet another advantage of the present invention is that the key receptacle is intelligent so that an external reader/writer or other hardware device can be eliminated. Additional functions can also be programmed on the circuit of the key receptacle.
These and other advantages of the present invention will become apparent to those skilled in the art from the following detailed description, wherein is shown and described illustrative embodiments of the invention, including best modes contemplated for carrying out the invention. As will be realized, the invention is capable of modifications in various obvious aspects, all without departing from the spirit and scope of the present invention. Accordingly, the drawings and detailed description are to be regarded as illustrative in nature and not restrictive.
The present invention provides an electronic key system having an electrical/electronic key-like device and an intelligent key receptacle, wherein the system is capable of performing a transaction between the electrical/electronic key-like device and key receptacle after the electrical/electronic key-like device is inserted into the key receptacle and moved to a predetermined position. In some embodiments, the key receptacle is capable of functionally receiving either a key-like device with exposed contacts or a key-like device with embedded circuits which are not exposed.
Also, it is appreciated that the electronic key system of the present invention is not limited by the term “key” or its definition. The system of the present invention may also be referred to as an electronic lock or locking system, data logging system, cashless vending system, data decrementing system, or data access control system, etc. For simplification and explanation, the system 40 described below is referred to as “electronic key system”.
The system 40 shown in
Still referring to
As shown in
The key receptacle 44 further includes a transceiver antenna member 56. The transceiver antenna member 56 is disposed in the housing 46 near the inside end 50 of the opening 48 as shown in
Also as shown in
The interface 58 may provide a standard interface protocol, such as RS-232, RS-485, etc., at least one input/output line, and power/ground. It should be appreciated that the interface 58 may provide other types of interface protocols, such as wireless communications, MDB (Multiple Drop Bus), USB (Universal Serial Bus), etc., without departing from the scope of the present invention. By using the standard RS-232 interface protocol, the system significantly speeds up the integration cycle and eliminates chip-level interfacing, which is one of the advantages over the earlier systems. This eases the migration to new key technologies and applications and handling of sophisticated memory security algorithms. By using the standard RS-485 interface protocol, the system not only provides the above advantages, but also provides Daisy Chain networking with relatively inexpensive twisted pair cables and long range communications (up to 1 km or more with repeaters). By using RS-485 interface protocol, the system also allows each receptacle to have a unique, programmable ID and provides access to the at least one remotely addressable logic-level outputs in case of multiple receptacle systems/configurations
With further reference to
Also as shown in
In one exemplary implementation of the circuit 54, the transceiver antenna member 56, the circuit 70, and the magnetic coupling member 72, a suitable integrated circuit, such as model EM4056, made by EM Microelectronic-Marin SA, can be used in accordance with the principles of the present invention. The EM4056 product/data information can be found on EM Microelectronic-Marin SA's website, at www.emmicroelectronic.com, which is incorporated herein by reference.
The position at which the key 42 is capable of generating sufficient energy is predetermined by the mechanical alignment between the key 42 and the receptacle 44 and by the distance between the alignment of the magnetic fields 74 and 76. Accordingly, a key external to the panel in which the receptacle 44 is mounted cannot “talk” with the transceiver antenna member 56, i.e., not enough energy is coupled or flows between the magnetic coupling member 72 and the transceiver antenna member 56. This prevents “accidental” or “casual” activation by authorized keys and also prevents those keys that do not conform with the mechanical alignment of the receptacle, i.e. unauthorized keys, from becoming active or causing false triggering.
In some embodiments, the key 42 and the key receptacle 44 are configured and arranged such that a tactile feedback is generated when the key-like device is turned into the predetermined position. Other types of feedback can also be generated within the scope of the present invention, for example, an audible feedback by a buzzer or a visible feedback by a LED.
As shown in
The enclosure 64 of the key 42 is preferably molded plastic. The circuit 70 and the magnetic coupling member 72 are housed inside the enclosure 64 and are not exposed to the outside environment. Accordingly, key detection and communication of the present invention are performed without physical contact between the electrical components/electronics of the key and the electrical components/electronics of the key receptacle. This substantially reduces the wear and tear on the key and the key receptacle. Another advantage is that the contactless system allows the electrical components/electronics to be sealed against corrosion, such as galvanic decay, or other hostile environments, such as salt air/spray or chemicals, etc.
To operate an electronic key system in accordance with the present invention, a user simply fully inserts a key into a key receptacle and turns the key to a predetermined position to enable a transaction between the key and the key receptacle. In some embodiments, a user will feel a feedback when the key is turned to this predetermined position. In other embodiments, a user simply inserts a key into a key receptacle until the user senses a feedback, in which case no rotation of the key is necessary.
The present invention can be used in many applications, for example, a data logging application for transport of data to/from a remote station, an access control application, and a cashless vending operation, etc. In a data logging operation, the system reads/writes information from/to the key, and the user transports data to/from a remote station via a key receptacle. In an access control operation, the system determines whether the key is one of the permitted keys. If so, the system outputs logic command, such as a user-specified length of time, etc. This application can be used for locks and gates, etc. In a cashless vending operation, the system stores an amount of value (e.g. cash value, or number of credits, etc.) on the key and decrements the value on the key after each vending operation. Once the cash is used up, additional cash can be recharged onto the key in a similar operation. During a cashless vending operation, a user and/or the system may also activate a dispenser, open a control, and activate the control for a length of time.
Although the present invention has been described with reference to preferred embodiments, persons skilled in the art will recognize that changes may be made in form and detail without departing from the spirit and scope of the invention.
| Number | Date | Country | |
|---|---|---|---|
| Parent | 10112989 | Mar 2002 | US |
| Child | 11617381 | Dec 2006 | US |
