Card Connector
A card connector has a housing, a sliding member that is designed to receive a card, and a latching member that is connected to the housing. The sliding member is slidable relative to the housing. The latching member is designed to engage the card to prevent the card from being removed from the housing.
The present invention relates to a card connector, in particular to a memory card connector.
BACKGROUND OF THE INVENTIONMemory cards for storing data are used in many electronic devices, such as video cameras, digital still cameras, smartphones, PDA's, music players, ATMs, cable television decoders, toys, games, PC adapters, multi-media cards and other electronic applications. A card reader, which typically is part of an electronic device, is used to read data from a memory card and transmit the data to the electronic device. And a card reader may also be used to write data from the electronic device to the memory card. A card connector is used to connect a memory card to a card reader.
There are a variety of card connectors. A common type of card connector is the push-push type, in which a memory card is first pushed into the cavity of the card connector to a latched operative position and is pushed again to be ejected and released from the latched position.
U.S. Pat. No. 7,367,828 ('828 patent), incorporated herein by reference, describes a typical memory card connector of the push-push type. As illustrated in
Referring to
Referring to
As shown in
When pushing of the memory card 36 in the inward direction “A” is stopped, as shown in
From the latched operative position, a further push (to the “overrun” or inner limit position) and a release of the memory card 36 allow the coil spring 66 to push the memory card 36 back to the position of
Throughout this entire process, the spring arm 84 (
Although not described in the '828 patent, the lock of the projection 68 of the locking arm 62b with the recess 36b of the memory card 36 can be either a soft lock or a hard lock. In a soft lock, the lock of the projection 68 with the recess 36b can prevent accidental removal of the memory card 36 from its latched operative position. But it cannot prevent the memory card 36 from being forcefully pulled out from its latched operative position. In a hard lock, the lock of the projection 68 with the recess 36b can prevent the memory card 36 from being pulled out either by accident or by the application of a force.
The inventor of the present application recognizes that in a conventional memory card connector with a hard lock, a forceful removal of the memory card from the latched operative position may damage the memory card connector. At the latched operative position, as illustrated in
The applicant's invention solves this problem by using a latching member connected to the housing to keep (or latch) the memory card in the latched operative position. With this arrangement a pulling force on the memory card is transmitted from the memory card to the latching member and then to the housing. In the conventional arrangement of the '828 patent, on the other hand, a pulling force on the memory card 36 is transmitted from the memory card 36 to the projection 68, then to the cam slider 62, to the pin 64, and finally to the housing 28. Since the pin 64 is used to transmit the force, it may be damaged if the force is sufficiently large.
According to one aspect of applicant's invention, a card connector includes a housing, a sliding member that is configured to receive a card, and a latching member that is connected to the housing. The latching member is configured to engage the card to prevent the card from being removed from the housing. The sliding member is slidable relative to the housing;
In a preferred embodiment, the sliding member is at least partially disposed in the housing, and the sliding member has a first position and a second position that is further inside the housing than the first position.
In another preferred embodiment, the latching member has an engaged position and a disengaged position. At the engaged position the latching member engages the card to prevent the card from being removed from the housing. At the disengaged position the latching member is disengaged from the card thus allowing the card to be removed from the housing.
In still another preferred embodiment, when the sliding member is at the second position the latching member is at the engaged position to engage the card to prevent the card from being removed from the housing, and when the sliding member is at the first position the latching member is at the disengaged position and is disengaged with the card, thus allowing the card to be removed from the housing.
In yet another preferred embodiment, the sliding member includes a notch. When the sliding member is at the first position the sliding member pushes the latching member to the disengaged position. When the sliding member is at the second position the notch of the sliding member allows the latching member to be at the engaged position.
In still yet another preferred embodiment, the card includes a notch. When the sliding member is at the second position, the latching member engages with the notch of the card to prevent the card from being removed from the card connector.
In a further preferred embodiment, the latching member and the notch of the card are configured so that when the latching member engages with the notch of the card to prevent the card from being pulled out of the housing, the engagement does not lift the latching member from the engaged position to the disengaged position.
In a still further preferred embodiment, the latching member and the notch of the sliding member are configured so that the latching member is moved from the engaged position to the disengaged position when the sliding member moves from the second position into the first position.
In a yet further preferred embodiment, the notch of the sliding member includes an incline which allows the notch to lift the latching member out of the notch of the card when the sliding member moves from the second position into the first position.
In a still yet preferred embodiment, the latching member includes a locking member and an elastic member that connects the locking member to the housing.
In another preferred embodiment, the locking member has an engaged position and a disengaged position and the elastic member biases the locking member towards the engaged position.
In still another preferred embodiment, the card includes a notch. When the sliding member is at the second position, the locking member engages with the notch of the card to prevent the card from being removed from the card connector.
In yet another preferred embodiment, the locking member and the notch of the card are configured so that when the locking member engages with the notch of the card to prevent the card from being pulled out of the housing, the engagement does not lift the locking member from the engaged position to the disengaged position.
In still yet another preferred embodiment, the locking member and the notch of the sliding member are configured so that when the sliding member moves from the second position into the first position, the locking member is moved from the engaged position to the disengaged position.
In a further preferred embodiment, the notch of the sliding member includes an incline which allows the notch to lift the locking member out of the notch of the card when the sliding member moves from the second position into the first position.
In a still further preferred embodiment, the notches are aligned along a lateral direction of the housing.
In a yet further preferred embodiment, the housing includes a side rail and the latching member is connected to the side rail.
In a still yet further preferred embodiment, the housing includes a cover and the latching member is connected to the cover.
According to another aspect of applicant's invention, a card connector includes a housing, a sliding member that is designed to receive a card, and a latching member. The sliding member is slidable relative to the housing. The latching member includes an engaged position where the latching member engages the card to prevent the card from being removed from the housing, and a disengaged position where the latching member is disengaged with the card to allow the card to be removed from the housing. The sliding member moves the latching member between the engaged position and the disengaged position.
In one preferred embodiment, the sliding member is at least partially disposed in the housing, and it has a first position and a second position that is further inside the housing than the first position.
In another preferred embodiment, when the sliding member is at the second position the latching member is at the engaged position to engage the card to prevent the card from being removed from the housing. When the sliding member is at the first position the latching member is at the disengaged position and is disengaged with the card, thus allowing the card to be removed from the housing.
In still another preferred embodiment, the sliding member includes a notch. When the sliding member is at the first position the sliding member pushes the latching member to the disengaged position. When the sliding member is at the second position the notch of the sliding member allows the latching member to be at the engaged position.
In yet another preferred embodiment, the card includes a notch. When the sliding member is at the second position, the latching member engages with the notch of the card to prevent the card from being removed from the card connector.
As shown in
The housing 30 is preferably made from a dielectric material and includes two rails 32, 34, a plurality of electric terminals 36, and an opening 38. The two rails 32, 34, arranged in parallel along the edges of the housing 30, extend in a longitudinal direction of the housing 30. One rail 32 is configured to receive a side (an edge) of the sliding member 50, thereby allowing the sliding member 50 to slide along the rail 32 (to be described in more detail below). Alternatively, both rails 32, 34 may be configured to receive two opposite sides (edges) of the sliding member 50, respectively. In the embodiment shown in
The terminals 36 of the housing 30 are used for electrical connection with the electric contacts of a memory card 80. The terminals 36 may be of any type that is known in the art, such as the type described in U.S. Pat. No. 7,367,838.
One or each of the side surfaces of the housing 30 may be covered with a cover. Typically, the cover is made from a metal such as sheet metal, although it can be made from any suitable material such as a plastic material. The cover may substantially shield the entire side of the housing 30, as shown in U.S. Pat. No. 7,367,838. Alternatively, as shown in
The opening 38 of the housing 30 allows the housing 30 to receive a memory card 80 (as shown in
As shown in
The locking mechanism 60 of the memory card connector 20 is shown in each of
The structure of the locking mechanism 60 for performing the first function may be similar in many respects to any prior art locking mechanism such as the locking mechanism described and shown in U.S. Pat. No. 7,367,838. The structure may include a heart-shaped cam slot, a pin, and a spring 52. Preferably the heart-shaped cam slot is part of the sliding member 50. As shown in
The structure of the locking mechanism 60 for performing the first function can position the sliding member 50 (and memory card 80) at three positions: the released position, the latched position, and the overrun position. To connect the memory card 80 to the memory card connector 20, a user places the memory card 80 in the sliding member 50, and pushes the sliding member 50 and memory card 80 from the released position further inside the housing 30, through the latched position, into the overrun position. Then the user releases the sliding member 50 and memory card 80 at the overrun position, allowing the spring 52 to push the sliding member 50 and memory card 80 from the overrun position into the latched position. At this point, the pin latches into a latch notch of the heart-shaped cam slot, thereby stopping the sliding member 50 at the latched position. At the same time, the memory card 80 is connected (or latched) to the housing 30, preventing the memory card 80 from being removed from the memory card connector 20. At the latched position, the contacts of the memory card 80 are in contact with the terminals 36 of the memory card connector 20. To release the sliding member 50 and memory card 80 from the latched position, the user pushes the sliding member 50 and memory card 80 from the latched position further inside the housing 30 into the overrun position. Then the user releases the sliding member 50 and memory card 80, allowing them to retract from the overrun position, through the latched position, and into the released position. At this position, the user can remove the memory card 80 from the memory card connector 20.
As stated above, the second function performed by the locking mechanism 60 is (1) to secure (or latch) the memory card 80 in the housing 30 when the sliding member 50 is at the latched position, and (2) to release the memory card 80 from the memory card connector 20 when the sliding member 50 is at the released position. In the embodiment shown in
As shown in
In the embodiment shown in
Preferably, the engagement between the locking member 70 and the notch 64 of the memory card 80 at the latched position is a hard lock. In other words, the locking member 70 engages the notch 64 of the memory card 80 at the latched position to prevent the memory card 36 from being pulled out by force. To this end, the surface of the locking member 70, which engages the notch 64 of the memory card 80, is configured so that it does not lift the locking member 70 out of the notch 64 when the user attempts to forcefully pull the memory card 80 out of the connector 20. This prevents the memory card 80 from being removed from the memory card connector 20 when the memory card 80 is at the latched position. Preferably, this surface of the locking member 70 does not have a slope that allows the notch 64 of the memory card 80 to exert a lifting force on the locking member 70. For example, as shown in
On the other hand, when the sliding member 50 moves from the latched or overrun position to the released position, the notch 66 of the sliding member 50 preferably lifts the locking member 70 out of the notches 64, 66 of the memory card 80 and sliding member 50, allowing the memory card 80 and sliding member 50 to move to the released position. To this end, the engagement between the locking member 70 and the notch 66 of the sliding member 50 exerts a lifting force that lifts the locking member 70 out of the notches 64, 66 of the memory card 80 and sliding member 50. In the embodiment shown in
When the sliding member 50 is between the latched position and the overrun position, the locking member 70 may be at either the engaged position or the disengaged position. If the notch 66 of the sliding member 50 is sufficiently long, the locking member 70 will stay inside the notch 66 and the locking member 70 will be in the engaged position. If the notch 66 of the sliding member 50 is not sufficiently long, the locking member 70 will be pushed to the disengaged position outside the notch 66 when the sliding member 50 moves from the latched position to the overrun position. In this case, the surface of the locking member 70 that engages a back side of the notch 66 may have an incline 78 (a gentle slope) that allows the notch 66 to lift the locking member 70 to the disengaged position.
In operation, a user first inserts the memory card 80 into the sliding member 50 (and the housing 30) of the memory card connector 20. Initially, the memory card 80 is at the released position as shown in
As the user pushes the memory card 80 further inside the housing 30, the memory card 80 will be at the latched position as shown in
If the user pushes the memory card 80 and sliding member 50 past the latched position into the overrun position and then releases the memory card 80, the spring 52 pushes the memory card 80 and sliding member 50 back outwardly until the pin latches into the latch notch of the heart-shaped cam slot. At this position, the pin fixes the sliding member 50 at the latched position. And the locking member 70 of the latching member 62 rests inside the notches 64, 66 of the memory card 80 and sliding member 50. Since the sliding member 50 is fixed at the latched position and cannot move past the latched position, the gentle slope 78 inside the notch 66 of the sliding member 50 cannot lift the locking member 70 into the disengaged position to allow the memory card 80 and sliding member 50 to return to the released position. As a result, the locking member 70 remains inside the notch 64 of the memory card 80. If the user attempts to forcefully remove the memory card 80 from the latched position, the locking member 70 prevents the memory card 80 from being removed. And the force applied by the user is transmitted from the memory card 80 to the latching member 62 and then to the housing 30. Since the force is not transmitted through the pin, the pin cannot be damaged by the attempted forceful removal.
To remove the memory card 80 from the latched position, the user pushes the memory card 80 further inside the housing 30 into the overrun position and then releases the memory card 80. The memory card 80 and sliding member 50 retreat under the spring force through the latched position to the released position. The sliding member 50 will not stop at the latched position because the pin will not latch into the latch notch of the heart-shaped cam slot. The user then can remove the memory card 80 from the card connector 20.
While particular embodiments of the present invention have been shown and described, it will be obvious to those skilled in the art that changes and modifications can be made without departing from this invention in its broader aspects. Therefore, the appended claims are to encompass within their scope all such changes and modifications as fall within the true spirit and scope of this invention.
Claims
1-3. (canceled)
4. A card connector comprising:
- a housing;
- a sliding member that is configured to receive a card, wherein the sliding member is slidable relative to the housing; and
- a latching member that is connected to the housing, wherein the latching member is configured to engage the card to prevent the card from being removed from the housing, wherein the sliding member is at least partially disposed in the housing, wherein the sliding member has a first position and a second position that is further inside the housing than the first position, wherein the latching member has an engaged position and a disengaged position, wherein at the engaged position the latching member engages the card to prevent the card from being removed from the housing, wherein at the disengaged position the latching member is disengaged from the card thus allowing the card to be removed from the housing, wherein when the sliding member is at the second position the latching member is at the engaged position to engage the card to prevent the card from being removed from the housing, and wherein when the sliding member is at the first position the latching member is at the disengaged position and is disengaged with the card, thus allowing the card to be removed from the housing.
5. The card connector of claim 4, wherein the sliding member includes a notch, and wherein when the sliding member is at the first position the sliding member pushes the latching member to the disengaged position, and wherein when the sliding member is at the second position the notch of the sliding member allows the latching member to be at the engaged position.
6. The card connector of claim 5, wherein the card includes a notch, and wherein when the sliding member is at the second position, the latching member engages with the notch of the card to prevent the card from being removed from the card connector.
7. The card connector of claim 6, wherein the latching member and the notch of the card are configured so that when the latching member engages with the notch of the card to prevent the card from being pulled out of the housing, the engagement does not lift the latching member from the engaged position to the disengaged position.
8. The card connector of claim 6, wherein the latching member and the notch of the sliding member are configured so that the latching member is moved from the engaged position to the disengaged position when the sliding member moves from the second position into the first position.
9. The card connector of claim 8, wherein the notch of the sliding member includes an incline which allows the notch to lift the latching member out of the notch of the card when the sliding member moves from the second position into the first position.
10-11. (canceled)
12. A card connector comprising:
- a housing;
- a sliding member that is configured to receive a card, wherein the sliding member is slidable relative to the housing; and
- a latching member that is connected to the housing, wherein the latching member is configured to engage the card to prevent the card from being removed from the housing, wherein the sliding member is at least partially disposed in the housing, wherein the sliding member has a first position and a second position that is further inside the housing than the first position, wherein the latching member includes a locking member and an elastic member that connects the locking member to the housing, wherein the locking member has an engaged position and a disengaged position and the elastic member biases the locking member towards the engaged position, wherein the card includes a notch, and wherein when the sliding member is at the second position, the locking member engages with the notch of the card to prevent the card from being removed from the card connector.
13. The card connector of claim 12, wherein the locking member and the notch of the card are configured so that when the locking member engages with the notch of the card to prevent the card from being pulled out of the housing, the engagement does not lift the locking member from the engaged position to the disengaged position.
14. The card connector of claim 12, wherein the locking member and the notch of the sliding member are configured so that when the sliding member moves from the second position into the first position, the locking member is moved from the engaged position to the disengaged position.
15. The card connector of claim 14, wherein the notch of the sliding member includes an incline which allows the notch to lift the locking member out of the notch of the card when the sliding member moves from the second position into the first position.
16. The card connector of claim 12, wherein the notches are aligned along a lateral direction of the housing.
17-20. (canceled)
21. A card connector comprising:
- a housing;
- a sliding member that is designed to receive a card, wherein the sliding member is slidable relative to the housing; and
- a latching member including an engaged position where the latching member engages the card to prevent the card from being removed from the housing, and a disengaged position where the latching member is disengaged with the card to allow the card to be removed from the housing, wherein the sliding member moves the latching member between the engaged position and the disengaged position, wherein the sliding member is at least partially disposed in the housing, wherein the sliding member has a first position and a second position that is farther inside the housing than the first position, wherein when the sliding member is at the second position the latching member is at the engaged position to engage the card to prevent the card from being removed from the housing, and wherein when the sliding member is at the first position the latching member is at the disengaged position and is disengaged with the card, thus allowing the card to be removed from the housing.
22. The card connector of claim 21, wherein the sliding member includes a notch, and wherein when the sliding member is at the first position the sliding member pushes the latching member to the disengaged position, and wherein when the sliding member is at the second position the notch of the sliding member allows the latching member to be at the engaged position.
23. The card connector of claim 22, wherein the card includes a notch, and wherein when the sliding member is at the second position, the latching member engages with the notch of the card to prevent the card from being removed from the card connector.
Type: Application
Filed: Jul 30, 2008
Publication Date: Feb 4, 2010
Inventor: Kiyoshi Abe (Cupertino, CA)
Application Number: 12/182,995