JPH08167449A - Card ejection device for card connector and card connector - Google Patents

Abstract

PURPOSE: To attain miniaturization and weight saving for the card connector by making use of a wire formed from a shape memory alloy as the card ejection device for a card connector, which is equipped with a surface electrode for inserting/extracting a card, instead of having bulky parts such as a motor, a solenoid and the like and parts with mechanical sliding sections. CONSTITUTION: A movable locking body 17 equipped with an engaging pawl 18 is installed onto a base 1 mounted with a cover 31 capable of being opened/ closed, and a shape memory wire 24 capable of being shortened by an exothermic reaction due to electrical energization is connected to the movable locking body 17. One end section of the wire 24 is fixed onto the base side via terminals 25 and 26. The locking pawl 18 is faced to the engaging section 45 of the cover 31 in a state that the locking pawl is energized by an elastic body 22.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a card connector card ejection device and a card connector.

[0002]

2. Description of the Related Art Recently, not only cameras based on conventional optical principles but also cameras capable of electromagnetically recording a subject have been proposed. In an electromagnetic application camera, it is desired that the medium for recording an object electromagnetically be smaller than a known IC card. Further, not only cameras but also cards used as general information recording media are being miniaturized.

Under such circumstances, a card connector as a device for electrically connecting a card and an electronic circuit is also required to be small and thin, which is suitable for a miniaturized card. The slim design allows it to be mounted on small portable devices such as cameras.

On the other hand, in the conventional card ejecting apparatus adopted in the card connector having the automatic card ejecting function, the one using the electric power as a driving source is a component such as a motor or solenoid, that is, the volume is relatively large. A component having a mechanical sliding portion that is easily bulky and may cause rusting or seizure is used as a power source.

By the way, in the above-mentioned card connector, it is indispensable to improve the contact reliability between the surface electrode of the card and the electrode contact provided on the connector side in order to improve the performance of the card connector. Various attempts have been made for that purpose. Applying treatment such as gold plating to the electrode contacts is one of the commonly used measures. Also, in a card connector in which the entire surface of the card, including the surface electrodes, is inserted into the connector while rubbing against the electrode contacts on the connector side, cleaning them by rubbing between the surface electrodes of the card and the electrode contacts. It is said that the action to do is exhibited.

[0006]

However, if a bulky component such as a motor or a solenoid is used for the card connector which is required to be small and thin as described above, it is difficult to meet the requirement. Moreover, it is not preferable for a precision portable device such as a camera to use a component that may cause rusting or seizure.

On the other hand, in the card connector which exhibits the above-mentioned cleaning action, the electrode contact on the connector side also rubs the surface other than the surface electrode of the card to make a rubbing mark on the surface, or the electrode contact is prematurely worn. There is a problem such as.

The present invention has been made in view of the above circumstances and problems.

The object of the present invention is not to use a bulky component such as a motor or a solenoid or a component having a mechanical sliding portion as a drive source, but instead to use a shape memory alloy to achieve miniaturization and weight reduction. An object of the present invention is to provide a card ejection device of a card connector that is easy to perform and can be kept at a low price.

Another object of the present invention is to provide a card connector provided with a card ejection device using a shape memory alloy as a driving source, wherein the cleaning action by rubbing between the surface electrode of the card and the electrode contact on the connector side is It is an object of the present invention to provide a card connector which can be minimized at necessary points both at the time of insertion and at the time of extraction.

[0011]

SUMMARY OF THE INVENTION A card ejecting device for a card connector according to a first aspect of the present invention comprises a base provided with electrode contacts for contacting surface electrodes of the card, and a longitudinal direction within a predetermined range on the base. A cover that is movably attached and that is swingable in the opening / closing direction, a card insertion / removal port provided in the cover and a holding mechanism for the inserted card, and a cover push-out device that constantly biases the cover backward. A mechanism, a cover opening mechanism for constantly urging the cover in the opening direction, a first lock mechanism for holding the cover at the front position against the urging by the pushing mechanism, and a cover only at the front position. In a card connector including a second lock mechanism that locks and holds in a closed posture and releases the locked state at a rear position, the first lock mechanism distributes the cover and the base. An engaging portion provided, a movable locking body that is displaceable with respect to the engaging portion in the engagement / disengagement direction, an elastic body that constantly urges the movable locking body in the engaging direction, and an energized state and a non-energized state. Made of a shape memory alloy that changes its length due to the temperature change caused by the change of temperature, and the change of the length displaces the movable locking body in the direction of disengagement from the engaging portion against the bias of the elastic body. And a stretchable member for allowing the stretchable member to move.

The elastic member used in the invention according to claim 1 is
It may be a flexible wire material such as a wire or a non-flexible member (which does not bend) such as a rod or a pin. When a wire material such as a wire is used, it is possible to adopt the configurations of claims 2, 3, and 4, and when a member having no flexibility such as a rod is used. , The elastic member is made of a shape memory alloy that increases its length by heat generated by energization, and the movable locking body engaged with the engaging portion by such an elastic member is pierced to unlock. It is also possible to do so.

A card ejecting device for a card connector according to a second aspect of the present invention is the card ejecting device according to the first aspect, wherein the elastic member is a wire made of a shape memory alloy whose length is shortened by heat generated by energization. This wire has one end fixed to the base and the other end connected to the movable locking body.

A card ejecting device for a card connector according to a third aspect of the present invention is the card ejecting device according to the second aspect, wherein the movable locking body has an intermediate portion rotatably supported by the base and one end and the other end. And the engaging claw and the connecting part are separately provided in the part, and the engaging part is provided in the cover in a recessed stepped shape and corresponds to the engaging claw, and is made of a wire made of a shape memory alloy. One part is fixed to the base, and the other part is connected to the connecting part of the movable locking body.

A card ejecting device for a card connector according to a fourth aspect of the present invention is the card ejecting device for a card connector according to the third aspect, wherein the wire is bent in a U shape and both ends thereof are fixed to the base. The bending part is connected to the connecting part of the movable locking body, and this wire is arranged along the side surface of the cover, and the power supply wire is electrically connected to the both ends fixed to the base of the wire. Has been done.

According to a fifth aspect of the present invention, there is provided a card connector ejecting device for a card connector, in which a base provided with an electrode contact which comes into contact with a surface electrode of the card is attached to the base so as to be movable in the front-back direction within a predetermined range. A cover attached so as to be swingable in the opening / closing direction, a card insertion / removal port provided on the cover and a holding mechanism for the inserted card, a cover pushing mechanism for constantly biasing the cover backward, and a cover always A cover opening mechanism for urging in the opening direction,
A first locking mechanism for holding the cover in the front position against the bias of the pushing mechanism, and a second lock for locking the cover only in the front position and holding it in the closed posture and releasing the locked state in the rear position. And a mechanism.

[0017]

In the invention according to claim 1, when the first lock mechanism is released, the cover is pushed out to the rear position by the cover pushing mechanism, whereby the second lock mechanism is released and the cover is opened. Is opened to the open position. That is, the cover is open when both the first lock mechanism and the second lock mechanism are released.

When the cover is open, the card is inserted through the card insertion / removal opening, and the inserted card is held by the cover by the holding mechanism. When the cover holding the card is closed against the bias of the cover opening mechanism and then protruded to the front position against the bias of the cover pushing mechanism, the first lock mechanism holds the cover at the front position. Then, the cover is held in the closed posture by the second lock mechanism. That is, the cover is closed when both the first lock mechanism and the second lock mechanism are in the locked state.

As a member for disengaging the movable locking body of the first lock mechanism from its engaging portion, it is made of a shape memory alloy whose length changes according to temperature change accompanying switching between energized state and de-energized state. Since the elastic member is used, the unlocking operation of the first lock mechanism can be performed without using a component having a mechanical sliding portion such as a motor or a solenoid.

According to the second aspect of the invention, since the wire made of a shape memory alloy is used as the elastic member, it is easy to simplify the structure as compared with the case of using a motor or a solenoid. , It is easy to achieve the weight reduction of the card connector.

According to the third aspect of the present invention, the ratio of the length from the pivotal support portion to the engaging claw and the connecting portion of the movable locking body is taken into consideration, whereby the engaging claw of the engaging portion with respect to the movement allowance of the connecting portion. It is possible to freely change the motion allowance. Therefore, it is easy to design so that the engaging claw can be reliably disengaged from the engaging portion of the cover when the length of the wire is shortened due to heat generation during energization.

In the invention according to claim 4, since the wire is arranged along the side surface of the cover and the power is supplied to both ends of the wire, the thinning of the card connector is for power supply. Not damaged by wires or wires.

In the invention according to claim 5, the operation of the first locking mechanism and the second locking mechanism is exactly the same as the above-mentioned operation described for the invention according to claim 1. Therefore, if the card is inserted into the open cover, the cover is closed, and then the card is projected to the front position, the first lock mechanism and the second lock mechanism are locked. In this case, the card moves with the cover, so that when the cover is closed, the surface electrode of the card contacts the electrode contact of the base, and when the card is pushed forward, the surface electrode of the card rubs against the electrode contact of the base. The surface electrodes and the electrode contacts are cleaned by the rubbing at that time. This cleaning action is also performed when the card is ejected by releasing the first lock mechanism and the second lock mechanism.

[0024]

1 is an exploded perspective view showing a card ejecting device for a card connector and a card connector according to an embodiment of the present invention.

In FIG. 1, reference numeral 1 denotes a base made of an electrically insulating synthetic resin molded body, in which a large number of groove portions 3 of the bottom plate portion 2 are provided with strip-shaped metal pieces having a spring property.
A predetermined number of the metal pieces are used as the contact piece members 4 for transmitting and receiving signals, and another predetermined piece is used as the cover opening mechanism 5 used for opening the cover 31 described later. That is, the plurality of contact piece members 4 are provided with the electrode contacts 6 that are slightly elevated above the bottom plate portion 2, and these electrode contacts 6 ... Are arranged in the array pattern of the plurality of surface electrodes T of the cover 31. They are arranged in a corresponding pattern. Electrode contact 6 ...
Is displaced along with the deformation of the contact piece member 4 while resisting the elasticity of the contact piece member 4. The cover opening mechanism 5 has a function as a lifter that constantly urges the cover 31 in the opening direction, and includes a pressing portion 7 that protrudes upward from the bottom plate portion 2.

A pair of left and right arm portions 8 and 8 are provided on both sides of the front end of the base 1, and a projection 9 used as a support shaft is provided on each of the arm portions 8 and 8 (see FIG. 1). Shows only the protrusion 9 of the arm 8 on one side).

The base 1 is provided integrally with base plate portions 11 and 12 projecting to one side thereof, which are distributed front and back.
The spring holding frame 13 is integrally provided on the rear side base plate portion 11, while the grooved partition wall 14 and the terminal holding portion 15 are arranged on the front side base plate portion 12 in the front-back direction (arrow A). It is set up. Then, a movable locking body 17 made of a synthetic resin molded body is attached to the rear base plate portion 11 via a shaft 16 so as to be freely rotatable around the shaft 16. Movable locking body 1
7, an intermediate portion is pivotally supported by the shaft 16, a hook-shaped engaging claw 18 is provided at one end, and a connecting portion 19 to which a pin member 21 such as a rivet is attached is provided at the other end. In addition, the engaging claw 18 and the connecting portion 19 form an opening angle of a substantially right angle. In the movable locking body 17, the engaging claw 18 is constantly elastically biased inward (in the engaging direction described later) by the elastic body 22 which is a compression coil spring housed and held in the spring holding frame 13. ing.

Reference numeral 23 is an expansion / contraction member made of a shape memory alloy, the length of which is changed by the temperature change accompanying the switching between the energized state and the non-energized state. It consists of a single thin wire 24 made of a shape memory alloy that shortens. This wire 24 is U
The terminals 25 and 26 are bent into a letter shape, and the terminals 25 and 26 are fixed to both ends by soldering or caulking.
5, 26 are fixed to the base 1 via the terminal holding portion 15. Power supply wires 28 and 29 extending from the power supply connector 27 are electrically connected to the terminals 25 and 26 by soldering or caulking. Further, the U-shaped bent portion of the wire 24 is wound around the pin member 21 provided on the connecting portion 19 of the movable locking body 17, and further,
An intermediate portion of the wire 24 is inserted into the two grooves of the grooved partition wall 14. With this configuration, when the wire 24 is energized to generate heat in the wire 24, the wire 24 is shortened to a length memorized by itself. When the wire 24 is shortened in this way, the connecting portion 19 of the movable locking body 17 is
Is pulled forward, and accordingly, the engaging claw 18 rotates outward against the force of the elastic body 22. When the wire 24 is de-energized and the wire 24 no longer generates heat, the wire 24 is increased in length to the length memorized by itself. When the wire 24 becomes longer in this way, the tensile force of the wire 24 disappears, and the engaging claw 18 is pushed by the force of the elastic body 22 and displaced inward.

In FIG. 1, reference numeral 31 is a cover. The cover 31 has a card insertion / removal opening 32 at its rear end and a flat cylindrical card holding mechanism 33 whose upper surface is partially opened. The cover 31 has a card slot 32
A card stopper 34 (see FIG. 4) with which the front end of the card C inserted from the end abuts is provided. Also, cover 3
A pair of left and right arm portions 35, 35 are provided on both sides of the front end of the projection 1, and each of these arm portions 35, 35 is provided with a long hole 36, 36 elongated in the front-rear direction. And
The arm portions 35, 35 are fitted into the outer sides of the arm portions 8, 8 of the base 1, and the long holes 36, 36 are fitted in the protrusions 9, 9. In this attached state, the pressing portion 7 of the cover opening mechanism 5 as the lifter corresponds to the lower surface of the card holding mechanism 33. In this way, the cover 31 attached to the base 1 is movable in the front-rear direction within a range in which the protrusion 9 can relatively move forward and backward within the elongated hole 36, and can swing in the opening and closing direction around the protrusion 9. is there.

FIG. 5 is a plan view of the card connector as viewed from the back side. As shown in FIGS. 1 and 5, the cover 31 is provided with a cover pushing mechanism 38. The cover pushing-out mechanism 38 includes a hollow box-shaped portion 39 integrally provided on the lower surface side of the holding mechanism 33 of the cover 31, a compression coil spring 41 housed in the box-shaped portion 39, and a compression coil spring 41.
The pressing pin 42 that is constantly urged in the protruding direction from the box-shaped portion 39 by the cover plate 43 that closes the box-shaped portion 39.
It has and.

A recess 44 is provided on one side surface of the cover 31 at a position corresponding to the engaging claw 18 of the movable locking body 17, and the stepped surface of the recess 44 is engaged with the engaging claw 18. The engaging portion 45 is to be disengaged. The engaging portion 45, the movable locking body 17, the elastic body 22, and the wire 24 constitute the first lock mechanism 10, and the action of the first lock mechanism 10 causes the cover 31 to push the push mechanism 38. It is designed to be held in the front position against the urging force. Details of the operation of the first lock mechanism 10 will be described later.

In FIG. 5, FIG. 6, FIG. 7 and FIG.
Is a second lock mechanism. The second lock mechanism 20 locks the cover 31 only in the front position and holds it in the closed posture and releases the locked state in the rear position (details of operation of the second lock mechanism 20 will be described later). It is composed of two stepped surfaces 51 and 52 provided at the rear end portion of the cover 1 having different levels and front and rear positions, and an engagement projection 53 projecting forward on the lower surface side of the card holding mechanism 33 of the cover 31.

FIG. 2 is a partial plan view showing a state where the cover 31 is locked by the first locking mechanism 10, and FIG. 3 is a partial plan view showing a state immediately after the cover 31 is unlocked by the first locking mechanism 10. 4 is a partially cutaway plan view of the cover 31 retracted to the rear position, FIG. 6 is a side view showing a state in which the cover 31 is locked by the second lock mechanism 20 in a partial cross section, and FIG. FIG. 8 is a side view with a partial cross section showing a state immediately after the lock mechanism 20 unlocks the cover 31, and FIG. 8 is a side view with a partial cross section showing the state where the cover 31 is open.

In the embodiment described above, when the cover 31 is pushed by the cover opening mechanism 5 as a lifter to open the cover 31, that is, when the card connector is not used, the wire 24 is not energized, and the wire 24 is not energized. 24
Is a little loose. Further, both the first lock mechanism 10 and the second lock mechanism 20 are unlocked. That is, as shown in FIG. 4, the engaging claw 18 of the movable locking body 17 in the first locking mechanism 10 is elastically contacted to the side surface of the cover 31 by the force of the elastic body 22, and the engaging protrusion of the second locking mechanism 20 is engaged. 5
3 engages with the upper stepped surface 52 to regulate the open position of the cover 31. The pressing pin 42 of the cover pushing-out mechanism 38 is pushed out by the compression coil spring 41, and the rear end surface 55 of the bottom plate portion 2 of the base 1 as shown in FIG.
(For the rear end surface 55 of the bottom plate portion 2, see FIG.
See).

With the cover 31 open as described above, the card C is inserted from the card slot 32 to be held by the holding mechanism 33, and the front end of the card C is abutted against the card stopper 34, and then the card C C or cover 3
1 is pushed as indicated by arrow a in FIG.
When the rear end portion is pushed down against the force of the cover opening mechanism 5 (see FIG. 1) to be closed, the second locking mechanism 2 is moved as shown in FIG.
The lower stepped surface 51 faces the engaging protrusion 53 of 0 immediately in front thereof. At this time, the engaging claw 1 of the movable locking body 17
8 slides on the side surface of the cover 31, and the pressing pin 42 of the cover pushing-out mechanism 38 slides on the rear end surface 55 of the bottom plate portion 2. When the cover 31 or the card C is pushed forward from the state shown in FIG. 7 as indicated by the arrow b in FIG. 8, the pressing pin 42 of the cover pushing mechanism 38 is pushed by the end surface 55 of the bottom plate portion 2 into the compression coil spring 4.
It is pushed into the box-shaped portion 39 against the force of 1, and with it,
In the second lock mechanism 20 as shown in FIG.
3 overlaps under the stepped surface 51 on the lower side, and in the first lock mechanism 10, after the engaging claw 18 of the movable locking body 17 faces the engaging portion 45, the elastic force is immediately increased as shown in FIG. The force of the body 22 fits into the recess 44 and engages with the engaging portion 45. In this state, the first locking mechanism 10 locks the cover 31 to prevent the cover 31 from retracting to the rear position,
The lock mechanism 20 also locks the cover 31 to prevent the cover 31 from opening, so that the cover 31 remains closed. Then, a surface electrode (described later) provided on the card C held by the cover 31 makes elastic contact with the electrode contact of the contact piece member 4.

When it is desired to eject the card C, the wire 24 is passed through the power supply connector 27 and the power supply wires 28 and 29.
Energize. By doing so, the wire 24 generates heat and the length is shortened to the length memorized by itself, so that the connecting portion 19 of the movable locking body 17 is pulled forward as shown by an arrow B in FIG. Along with this, the engaging claw 18 rotates outward against the force of the elastic body 22 and is disengaged from the engaging portion 45 (FIG. 3). Then, the pressing pin 42 of the cover pushing mechanism 38 is
Is abutted against the end surface of the bottom plate portion 2 of the base 1 by the force of the compression coil spring 41, the force causes the cover 31 to move to the rear position as shown by the arrow c in FIG. The engagement protrusion 53 of the mechanism 20 is released to the rear of the lower stepped surface 51 to release the locked state. When the second lock mechanism 20 is released in this way, the cover 31 is opened by the force of the cover opening mechanism 5 as shown by the arrow d in FIG. The opening angle of the cover 31 at this time is regulated by the engagement projection 53 hitting the upper stepped surface 52 (FIG. 8). The energization of the wire 24 may be stopped when the engaging claw 18 is disengaged from the engaging portion 45.

As described above, the cover 31
The forward / backward movement of is allowed by the relative movement of the projection 9 of the base 1 forward and backward within the elongated hole 36 of the cover 31.

In the above embodiment, by changing the ratio of the lengths from the pivotal support portion of the movable locking body 17 to the engaging claw 18 and the connecting part 19, the engaging claw 18 with respect to the movement allowance of the connecting part 19 is changed. It is possible to freely change the motion allowance. Therefore, it is possible to easily design the engaging claw 18 to surely disengage from the engaging portion 45 of the cover 31 when the length of the wire 24 is shortened due to heat generation during energization.

In this embodiment, the wire 24 is provided along the side surface of the cover 31, and the wire 24 is provided.
Since the power is supplied to both ends of the card connector, it is possible to easily achieve the thinning of the card connector as compared with the case where the wire 24 is arranged under the base 1 or on the cover 31.
There is an advantage that it is not damaged by the power supply wires 28, 29 and the wire 24.

When the open cover 31 is closed and then pushed out to the front position, the card C held by the cover 31 is covered by the cover 3 as shown by arrows e and f in FIG.
Since the surface electrode T of the card C rubs against the electrode contact 6 on the base 1 side, the surface electrode T and the electrode contact 6 are cleaned by the rubbing at that time. This cleaning action is also performed when the card is ejected by releasing the first lock mechanism 10 and the second lock mechanism 20.

Embodiments of the card ejecting device and the card connector of the card connector of the present invention are not limited to the above-mentioned embodiments. Other preferred embodiments will be listed below. (1) A card ejection device and a card connector in which the engaging portion of the first lock mechanism is provided on the base side and the movable locking body is provided on the cover side. (2) The elastic member is made of a non-flexible member such as a rod or a pin, and the elastic member is made of a shape memory alloy that lengthens due to heat generated by energization. A card ejecting device and a card connector configured so that the movable locking body engaged with the engaging portion is pierced to release the lock. (3) The elastic member is composed of a wire made of a shape memory alloy that shortens the length by heat generated by energization, one end of the wire is fixed to the base, and the other end is connected to the movable locking body. , A card ejection device and a card connector adapted to apply a voltage to one end and the other end thereof. (4) As shown in FIG. 9, the protrusion 6 protruding from the side surface of the base 1.
The cover opening mechanism 5 is configured by fitting the torsion coil springs 62, 62 into the coils 1, 61, and engaging one end of the torsion coil springs 62, 62 with the base 1 and the other end with the cover 2. Card ejector and card connector. In FIG. 9, the same parts as those described with reference to FIGS. 1 to 8 are designated by the same reference numerals and detailed description thereof is omitted.

[0042]

According to the first aspect of the present invention, the card can be ejected by opening the cover without using a component such as a motor or a solenoid that tends to increase in size. Easy to achieve downsizing and thinning. Further, the motor and the solenoid are apt to cause troubles such as rust and seizure of the mechanical sliding portion, but according to the present invention, the shape memory is used as a member for disengaging the movable locking body of the first lock mechanism from the engaging portion. Since the elastic member made of an alloy is used, there is an advantage that there is no mechanical sliding portion that causes such trouble.

According to the second aspect of the present invention, the card ejecting device can be constructed with a simple structure and a light weight.

According to the third aspect of the present invention, since it is not necessary to determine the change in length of the wire that shortens the length due to heat generation during energization with high accuracy, the design of the card connector becomes easier. Moreover, the production cost can be kept low.

According to the invention of claim 4, there is an advantage that the thinning of the card connector is facilitated.

According to the invention of claim 5, the cleaning action by rubbing between the surface electrode of the card and the electrode contact on the connector side is carried out to a minimum at necessary places both when the card is inserted and when it is pulled out. Therefore, even though the contact reliability between the two is improved and the performance of the card connector is enhanced, the situation in which the electrode contacts are unnecessarily worn or the surface of the card is scratched is not caused.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a card ejection device of a card connector and a card connector according to an embodiment of the present invention.

FIG. 2 is a partial plan view showing a state where the cover is locked by the first lock mechanism.

FIG. 3 is a partial plan view of a state immediately after the first lock mechanism unlocks the cover.

FIG. 4 is a partially cutaway plan view showing a state where the cover is retracted to a rear position.

FIG. 5 is a plan view of the card connector as viewed from the back side.

FIG. 6 is a partial cross-sectional side view showing a state in which the cover is locked by the second lock mechanism.

FIG. 7 is a side view, partly in cross section, showing a state immediately after the second lock mechanism unlocks the cover.

FIG. 8 is a side view showing a state in which a cover is opened in a partial cross section.

FIG. 9 is a plan view of an embodiment of a card ejecting device and a card connector of a card connector that employs a cover opening mechanism according to a modified example, viewed from the back side.

FIG. 10 is an explanatory diagram of a cleaning action of the surface electrode and the electrode contact.

[Explanation of symbols]

 C card T-plane electrode 1 base 5 cover opening mechanism 6 electrode contact 10 first locking mechanism 16 shaft 17 movable locking body 18 engaging claw 19 connecting portion 20 second locking mechanism 22 elastic body 24 wire (expandable member) 28, 29 Power supply wire 31 Cover 32 Card insertion / removal opening 33 Holding mechanism 38 Cover pushing out mechanism 45 Engagement part

Claims (5)

[Claims] 1. A base provided with an electrode contact which comes into contact with a surface electrode of a card, and a cover attached to the base so as to be movable in the front-rear direction within a predetermined range and swingable in the opening / closing direction. A card insertion / removal port provided in this cover and a holding mechanism for the inserted card, a cover pushing-out mechanism for constantly biasing the cover backward, and a cover opening mechanism for constantly biasing the cover in the opening direction, A first locking mechanism for holding the cover in the front position against the bias of the pushing mechanism, and a second lock for locking the cover only in the front position and holding it in the closed posture and releasing the locked state in the rear position. And a movable locking body that is displaceable in an engaging / disengaging direction with respect to the engaging portion and the engaging portion provided separately on the cover and the base. It is made of an elastic body that constantly urges the locking body in the engaging direction and a shape memory alloy that changes its length depending on the temperature change accompanying the switching between the energized state and the non-energized state. A card ejecting device for a card connector, comprising: an elastic member that displaces the locking body in the direction of disengagement from the engaging portion against the bias of the elastic body. 2. The expandable member is a wire made of a shape memory alloy that shortens in length by heat generated by energization, the wire having one end fixed to the base and the other end movable. The card ejection device for a card connector according to claim 1, wherein the card ejection device is connected to the locking body. 3. A movable locking body, wherein an intermediate portion is rotatably supported by a base, and one end portion and the other end portion are provided with an engaging claw and a connecting portion, respectively. One of the wires made of shape memory alloy is fixed to the base and the other is connected to the connecting portion of the movable locking body, which is provided in the cover in a stepped shape corresponding to the engaging claws, and is made of a shape memory alloy. The card ejecting device for a card connector according to claim 2. 4. A wire is bent in a U shape, both ends thereof are fixed to a base, and the U-shaped bent portion is connected to a connecting portion of a movable locking body, and the wire is covered. The card ejecting device of the card connector according to claim 3, wherein the power supply wire is electrically connected to the both ends fixed along the side surface of the wire and fixed to the base of the wire. 5. A base provided with an electrode contact which comes into contact with a surface electrode of a card, and a cover attached to the base so as to be movable in the front-back direction within a predetermined range and swingable in the opening / closing direction. A card insertion / removal port provided in this cover and a holding mechanism for the inserted card, a cover pushing-out mechanism for constantly biasing the cover backward, and a cover opening mechanism for constantly biasing the cover in the opening direction, A first locking mechanism for holding the cover in the front position against the bias of the pushing mechanism, and a second lock for locking the cover only in the front position and holding it in the closed posture and releasing the locked state in the rear position. A card connector comprising: a mechanism.