Patent Application
20060099856
This invention relates to a card connector for use in electric and electronic appliances in instruments and for use in printers and card readers, and more particularly to a card connector adapted to accommodate a plurality of cards by means of the same contacts.
There have been many different kinds of cards as media for a wide variety of information. It has been a common practice to acquire or store various information from or onto a card inserted into a card connector connected to an information appliance.
In prior art card connectors, contacts are arranged correspondingly to cards which are able to be inserted into the card connector, respectively, in one-to-one relationship, and the contacts each at least comprise a contact portion adapted to contact the card, a holding portion held in a housing, and a connection portion to be connected to a substrate. Such card connectors are disclosed in the following Patent Literature 1 (Japanese Patent Application Opened No. 2003-31,861) and Patent Literature 2 (Japanese Patent Application No. 2004-161,293).
Patent Literature 1
According to the Abstract of the Japanese Patent Application Opened No. 2003-31,861, this invention has an object to provide a card connector for IC cards having a push-in and push-out mechanism common to plural kinds of cards to achieve the miniaturization in overall shape of the connector. In a card connector for IC cards including a housing having an inserting opening common to plural kinds of IC cards, into which an IC card is inserted to bring the electrode of the IC card into connection with the contacts in the inserting opening, the housing includes therein a slider adapted to advance or retract in conjunction with push-in and push-out operations of the IC card in the housing, and a locking mechanism for locking the slider and the IC card when the push-in is effected and for releasing the locking when the push-out is effected, whereby a shape and a position are set in the slider depending upon the width, length and front shape of the IC card, positions of electrodes of the IC card, and positions of the contacts relative to the housing, thereby enabling the slider to engage the IC card in compliance with shapes of the plural kinds of IC cards. FIGS. 1 and 2 of the Patent Literature 1 illustrate contacts each corresponding to respective card in one-to-one relationship.
Patent Literature 2
According to the Abstract of the Japanese Patent Application No. 2004-161,293 filed by the applicant of the present case, the invention has an object to provide a card connector which, after one card has been inserted, is capable of preventing a further card from being inserted and easy to design its housing and easy to remove a card and achieves its miniaturization without any limitation in circuit design of substrates and without any obstruction to the high density of conductors. In a card connector including a required number of contacts adapted to contact connection portions of a plurality of memory cards and a housing having a plurality of inserting openings for receiving a plurality of memory cards, respectively, and arranging and holding the contacts therein, the card connector comprises at least one locking member located at a predetermined position on the housing and pivotable or movable when one kind of card is inserted, and at least one spring member displaceable when one kind of card is inserted, thereby permitting only one kind of card to be inserted with the aid of the locking member and the spring member. FIGS. 1, 2 and 3 of the Patent Literature 2 show contacts each correspond to respective card in one-to-one relationship.
In recent years, miniaturizations have proceeded in the information appliances as well as substrates or boards used therein so that areas occupied by the substrates have become narrower. Such a limitation of areas occupied by the substrates leads to the use of a plurality of substrates. Moreover, if a plurality of connectors is required for exchanging a plurality of memory cards, information appliances would become bulky which would be inconvenient for carrying them. Consequently, card connectors for receiving a plurality of cards have been proposed as in the Patent Literatures 1 and 2.
The card connectors disclosed in the Patent Literatures 1 and 2 suffer several disadvantages from plural kinds of contacts necessarily required correspondingly to a plurality of cards to be inserted, complicated arrangement of connection portions of the contacts, and difficulties in assembling operationality and mounting operation by a customer. Moreover, as the plural kinds of contacts are required corresponding to the number of cards, areas occupied by the substrates will increase, resulting in limitation of freedom for design of the substrate and connector.
It is an object of the invention to provide a card connector which overcomes the disadvantages of the prior art described above and which has a high degree of freedom for design of substrate and connector without complicating the arrangement of connection portions of contacts and is easy to assemble and easy to mount connection portions onto a substrate by a customer or consumer.
The above object can be achieved by a card connector 10 into and from which a plurality of cards are inserted and removed, including a required number of contacts 14 each having a contact portion adapted to contact the card, and a housing 12 arranging and holding the contacts 14 and having one or plural fitting openings each into which the card is inserted, wherein according to the invention the contacts 14 each comprise contact portions 22 and 24 to contact at least two cards 50 and 60 so that the same contact 14 can be brought into contact with at least two cards 50 and 60.
In the case that two cards 50 and 60 are inserted into upper and lower fitting openings arranged one above the other, the above object can be achieved by a card connector 10 into and from which two cards 50 and 60 are inserted and removed one above the other, including a required number of contacts 14 each having a contact portion adapted to contact the card 50, 60, and a housing 12 arranging and holding the contacts 14 and having two fitting openings 26 and 28 into which the cards 50 and 60 are inserted, respectively, wherein according to the invention the contacts 14 each comprise contact portions 22 and 24 to contact the two cards 50 and 60, respectively, so that the same contact 14 can be brought into contact with the two cards 50 and 60.
The housing 12 includes an upper wall 30, a lower wall 32, two side walls 34 for connecting the upper and lower walls 30 and 32, and a rear wall 36, and these upper 30, lower 32, two side 34 and rear 36 walls form the one or plural fitting openings 26 and 28, and the two side walls 34 are each provided at the inside with guide means 38 for guiding the card to the contact portions 22 and 24 of the contacts when the card 50, 60 is inserted.
The contacts 14 each comprise a connection portion 16 at one end adapted to be connected to a substrate or the like, a holding portion 18 provided contiguously to the connection portion 16 for fixing the contact to the housing 12, and contact pieces 20 at the other end, which are formed by dividing the portion adjacent to and extending from the holding portion 18 toward the other end into a plurality of pieces each having a contact portion 22, 24 adapted to contact the corresponding card.
The contact pieces 20 of the contacts 14 adapted to contact a card 60 to be inserted into the fitting opening 28 upper than the lowermost fitting opening 26 are bent such that the bent contact pieces 20 of the contacts 14 do not extend into the lower fitting opening 26. Moreover, the contacts 14 are inserted into the housing 12 from the side of the fitting opening and held in the housing.
As can be seen from the above description, the card connector according to the invention can bring about the following significant function and effect. According to the invention, the connector 10 into and from which a plurality of cards are inserted and removed, including a required number of contacts 14 each having a contact portion adapted to contact the card, and a housing 12 arranging and holding the contacts 14 and having one or plural fitting openings each into which the card is inserted, wherein the contacts 14 each comprise contact portions 22 and 24 to contact at least two cards 50 and 60 so that the same contact 14 can be brought into contact with at least two cards 50 and 60. Therefore, the card connector 10 according to the invention has a high degree of freedom for design of substrate and connector without complicating the arrangement of connection portions 16 of contacts 14 and without any limitation of areas occupied by substrates, and is easy to assemble and easy to mount connection portions onto a substrate by a customer or consumer.
According to the invention, the card connector 10 into and from which two cards 50 and 60 are inserted and removed one above the other, including a required number of contacts 14 each having a contact portion adapted to contact the card 50, 60, and a housing 12 arranging and holding the contacts 14 and having two fitting openings 26 and 28 into which the cards 50 and 60 are inserted, respectively, wherein the contacts 14 each comprise contact portions 22 and 24 to contact the two cards 50 and 60, respectively, so that the same contact 14 can be brought into contact with the two cards 50 and 60. Consequently, the card connector 10 according to the invention has a high degree of freedom for design of substrate and connector without complicating the arrangement of connection portions 16 of contacts 14 and without any limitation of areas occupied by substrates, and is easy to assemble and easy to mount connection portions onto a substrate by a customer or consumer.
According to the invention, the housing 12 includes an upper wall 30, a lower wall 32, two side walls 34 for connecting the upper and lower walls 30 and 32, and a rear wall 36, and these upper 30, lower 32, two side 34 and rear 36 walls form the one or plural fitting openings 26 and 28, and the two side walls 34 are each provided at the inside with guide means 38 for guiding the card to the contact portions 22 and 24 of the contacts when the card 50, 60 is inserted. Therefore, the cards 50 and 60 can be reliably conducted to the contact portions 22 and 24 of the contacts 14.
According to the invention, the contacts 14 each comprise a connection portion 16 at one end adapted to be connected to a substrate or the like, a holding portion 18 provided contiguously to the connection portion 16 for fixing the contact to the housing 12, and contact pieces 20 at the other end, which are formed by dividing the portion adjacent to and extending from the holding portion 18 toward the other end into a plurality of pieces each having a contact portion 22, 24 adapted to contact the corresponding card. Accordingly, it is possible to provide a card connector 10 which is able to be connected to a plurality of cards 50 and 60 by the use of the same contacts 14.
According to the invention, the contact pieces 20 of the contacts 14 adapted to contact a card 60 to be inserted into the fitting opening 28 upper than the lowermost fitting opening 26 are bent such that the bent contact pieces 20 of the contacts 14 do not extend into the lower fitting opening 26. Therefore, the same contacts 14 can be securely brought into contact with a plurality of cards 50 and 60 and there is no card to which the contacts could not be connected.
According to the invention, the contacts 14 are inserted into the housing 12 from the side of the fitting opening and held in the housing. Therefore, the contacts 14 having a plurality of contact pieces 20 can be easily inserted into the housing 12, and unintentional deformation of the contacts 14 is easy to confirm.
The invention will be more fully understood by referring to the following detailed specification and claims taken in connection with the appended drawings.
One embodiment of the invention will be explained with reference to
The card connector 10 according to the invention mainly comprises contacts 14 and a housing 12.
Before explaining the components of the card connector, the cards will be explained. The cards are used for printers, card readers and the like. The cards each mainly comprise contact portions adapted to contact the contact portions 22 and 24 of the contacts 14, patterns connecting from the contact portions of the card to circuits, and connection portions adapted to be connected to integrated circuits and central processing units mounted on the patterns. Cards to be used for the card connector 10 according to the invention include Multimedia card (registered trademark), SD card (Secure Digital memory card) (registered trademark), Memory-Stick (registered trademark), SmartMedia (registered trademark), CompactFlash (registered trademark), xD card (registered trademark), Memory-Stick Duo (registered trademark), and the like, these being IC cards having built-in CPU or IC for memory.
With the card connector 10 in the illustrated embodiment, the Memory-Stick 60 is inserted into the upper fitting opening, and the Memory-Stick Duo 50 is inserted into the lower fitting opening.
First, the contact 14 will be explained which is a subject matter of the invention. The contacts 14 are made of a metal and formed by means of the press-working of the known technique. Preferred metals from which to form the contacts 14 include brass, beryllium copper, phosphor bronze and the like which comply with the requirements such as electric conductivity, springiness, workability, and the like.
The contact 14 comprises at least contact portions 22 and 24 adapted to contact the plurality of cards 50 and 60, respectively, a holding portion 18 to be fixed to the housing 12, and a connection portion 16 to be connected to a substrate.
An important aspect of the contact 14 according to the invention lies in the feature capable of contacting a plurality of cards. For example, the contact 14 can contact both the Memory-Stick 60 inserted in the upper fitting opening and the Memory-Stick Duo 50 inserted in the lower fitting opening of the card connector. While the contact can contact the two cards 50 and 60 as shown in
While the connection portion 16 of the contact 14 is of a surface mounting type (SMT) in the illustrated embodiment, it may be of a dip type. The connection portion 16 of the contact 14 may be suitably designed according to a specification of the substrate to which the connection portion 16 is connected. In the illustrated embodiment, the connection portion 16 extends onto the side of the insertion of the cards 50 and 60 (on the side of the fitting openings 26 and 28 for the cards), although the connection portion 16 may extend onto the opposite side of the fitting openings. The extending direction of the connection portion may be suitably designed in consideration of the specification of the substrate, positions of the contact portions of the cards 50 and 60 and positions of insertion of the cards into the upper and lower fitting openings. It is preferable to insert and hold the contact 14 into the housing from the side of the fitting opening (from the side of the insertion of the cards) in view of easier insertion of the contact and easier ascertainment of deformation of the contact.
The holding portion 18 of the contact 14 serves to fix the contact 14 to the housing 12 by press-fitting arrow-head members into the housing 12, the arrow-head members being previously provided at the holding portion 18 to extend in width directions. Other than the press-fitting, it may be fixed to the housing 12 by hooking, welding, or the like. The size of the holding portion 18 may be suitably designed in consideration of the fact that the forwardly extending portion from the holding portion 18 is divided into a plurality of contact pieces 20 as described below, and the strength of the housing 12, miniaturization of the card connector 10 and the like. In the illustrated embodiment, the holding portion 18 is approximately 25 mm in width.
As described above, in order to bring the contact 14 (a single contact) into a plurality of cards (two cards in the illustrated embodiment), the forwardly extending portion from the holding portion 18 is divided into two contact pieces 20 extending in the longitudinal direction in the illustrated embodiment. The contact pieces 20 are each provided at its tip with a contact portion 22, 24 adapted to contact the respective card 50, 60. Positions of the contact portions 22 and 24 are suitably designed so that they extend into the respective fitting openings 26 and 28 to obtain predetermined contact pressures as shown in
The housing 12 will then be explained. The housing 12 is formed from an electrically insulating plastic material by means of the injection molding of the known technique. The materials suitable for the housing 12 include polybutylene terephthalate (PBT), polyamide (66PA or 46PA), liquid crystal polymer (LCP), polycarbonate (PC) and the like and combination thereof in consideration of dimensional stability, workability, manufacturing cost and the like. The housing 12 may be provided with a required number of fitting openings into which a plurality of cards is inserted, respectively. The housing 12 is provided with two fitting openings 26 and 28 arranged one above the other in the illustrated embodiment. Sizes of the fitting openings 26 and 28 are suitably designed so that the cards 50 and 60 can be inserted into the fitting openings, respectively, and on insertion of the cards 50 and 60, they can be brought into contact with the contacts 14.
The housing 12 comprises at least an upper wall 30, a lower wall 32, two side walls 34 and a rear wall 36. A required number of intermediate walls may be provided depending upon the number of cards to be inserted, as the case may be. The upper wall 30, the lower wall 32, the two side walls 34 and the rear wall 36 form the upper fitting opening 28 for the Memory-Stick 60 and the lower fitting opening 26 for the Memory-Stick Duo 50.
The side walls 34 are each provided on the inside with guides 38 for the purpose of facilitating conducting the inserted cards to the respective contact portions 22 and 24 of the contacts. Sizes of the guides 38 may be determined to enable the cards 50 and 60 to be guided to the respective contact portions 22 and 24 of the contacts and may be suitably designed in consideration of the sizes of the cards 50 and 60 and the strength of the housing 12.
Although the card connector having two fitting openings for the cards 50 and 60 arranged one above the other is shown in the illustrated embodiment, it is to be understood that a card connector may be constructed to bring a plurality of cards into contact with the same contacts irrespective of the number of cards.
Examples of applications of the present invention are card connectors 10 for use in electric and electronic appliances in instruments and for use in printers and card readers and particularly card connectors capable of accommodating a plurality of cards with the same contacts 14.
While the invention has been particularly shown and described with reference to the preferred embodiments thereof, it will be understood by those skilled in the art that the foregoing and other changes in form and details can be made therein without departing from the spirit and scope of the invention.
| Number | Date | Country | Kind |
|---|---|---|---|
| 2004-321,645 | Nov 2004 | JP | national |
