KR100400196B1 - apparatus for detecting card insertion - Google Patents

Abstract

One of the pair of detection contacts required for card insertion detection can be constituted by a ground contact, and a card insertion detection device with a small number of parts is obtained.

A card connector having a ground contact provided to conduct with a ground land of a card, wherein a part of the ground contact is connected to the ground contact with the ground contact, the tip is freed to form an insertion detection tongue, and is pushed by a card inserted in the base member. When it is displaced, the detection contact is brought into contact with the insertion detection tongue.

The insertion detecting tongue is provided in such a manner that it can be displaced independently from the ground contact so that the ground contact is not spaced apart from the ground land when pressed by the detection contact.

Description

Device for detecting card insertion

The present invention relates to an apparatus for detecting the insertion of a card in a connector for inserting and removing an information recording card such as a memory card.

The memory card connector not only detects the insertion of the card but also records or reads information. Conventionally, the insertion detection of the card is performed by providing a pair of detection contacts (detection terminals) which are pushed and displaced by the card and are in contact with the power supply terminal or the signal terminal of the connector.

However, a pair of detection contacts that can be installed for detecting insertion of a card in a connector such as various media cards that are miniaturized are factors that hinder the miniaturization and increase the cost.

This invention is made | formed in view of the conventional problem, and an object of this invention is to obtain the apparatus which can detect a card insertion more simply.

1 is a perspective view showing an embodiment in which the card insertion detecting device according to the present invention is applied to a memory card connector.

2 is a plan view of the same.

3 is a side view of the same.

4 is a perspective view showing the relationship between the ground contact and the sensing contact supported on the base member.

5 is a plan view.

FIG. 6 is a cross-sectional view taken along the line VI-VI of FIG. 5.

FIG. 7 is a cross-sectional view of the VI-VI line and the ground contact of FIG. 5 being pushed and displaced by the card.

FIG. 8 is a cross-sectional view of the VI-VI line of FIG. 5, in which both the ground contact and the detection contact are pushed and displaced by the card.

9 is a perspective view corresponding to FIG. 1 showing another form of the present invention.

Explanation of symbols for main parts of the drawings

10 base member 11 contact support wall

12, 13 inserting wall 14 inserting part

15 slide member 16 tension spring

18: heart cam mechanism 21: signal contact group

22: power contact 23: ground contact

23 a: soldering angle 23 b: fixing part

23 c: elastic deformation angle 23 d: end of contact contact

26: Insertion detection contact 26 a: Soldering angle

26 b: fixing part 26 c: elastic deformation angle

26 d: landing end 30: substrate

31: signal land group 32: power land

33: power ground land 36: insertion detection land

40: control circuit 41: power circuit

42: insertion detection circuit MC: memory card

P: Power Land E: Ground Land

L: Signal land group

The present invention has been made in view of detecting insertion of a card by using a ground contact for conducting a ground land of a card necessarily provided in the card connector.

In other words, the present invention provides a card having a base member having an insertion and removal portion of a card having a ground land, and a ground contact installed on the base member so as to be connected to the ground land when the card is inserted. In the connector, a part of the ground contact is connected to the ground contact with the ground contact, and the tip is freed to form an insertion detection tongue, while the detection contact contacts the insertion detection tongue when displaced by a card inserted in the base member. Characterized in that it supports.

In this way, if the insertion detection tongue is provided in the ground contact and the detection contact paired with the insertion detection tongue is provided, the card can be detected with almost no space.

Specifically, when the insertion detection tongue is pushed by the detection contact, the insertion contact tongue is installed so as to be displaced independently from the ground contact so that the ground contact does not fall from the ground land. Even if power is applied, it is possible to maintain contact between the ground contact and the ground land of the card and perform a stable detection operation.

The ground contact and the sensing contact are preferably arranged so as to be crimp-displaced in the order of the ground contact and the sensing contact when the card is inserted into the inserting / removing portion of the base member.

More specifically, the ground contact includes a fixing portion to the base member, an elastic deformation angle portion extending from the fixing portion, a contact point contact point pressed in contact with a ground land of a card formed at a free end of the elastic deformation angle portion, and the elasticity. The insertion detecting tongue piece formed at a part of the deformation angle, wherein the detection contact is formed at a fixed portion with respect to the base member and an elastic deformation angle extending from the fixing part to the insertion detection tongue piece of the ground contact and at a free end of the elastic deformation angle part. It is preferable to have a contacting end contacting the insertion detecting tongue piece and the elastic deformation angle part when it is displaced by the card.

The illustrated embodiment is an embodiment in which the card insertion detecting device of the present invention is applied to a memory card connector.

As shown in FIGS. 1 and 3, the base member 10 made of synthetic resin is fixed on the substrate 30. The base member 10 has a U-shape having a contact support wall 11 and right and left insertion walls 12 and 13 in plan view, and has a contact support wall 11 and left and right insertion walls 12 and 13. The insertion part 14 of the memory card MC is formed.

On the insertion wall 13 side, a slide member 15 in contact with the memory card MC inserted in the insertion section 14 is supported to be movable in the insertion direction of the memory card, and the slide member 15 is provided with a tension spring ( 16), the memory card is moved in the direction of ejecting the memory card.

The slide member 15 is position controlled by the heart cam mechanism 18. In other words, when the heart cam mechanism 18 moves the slide member 15 to its insertion end while pushing the slide member 15 according to the memory card inserted into the inserting portion 14, the heart cam mechanism 18 maintains the slide member 15, that is, the memory card in the insertion position. When the memory card is moved back to the insertion end in the insertion position, the slide member 15 is moved to the discharge position by the force of the tension spring 16, and the memory card can be taken out. Such a heart cam mechanism 18 is well known, and the present invention can be applied to any connector that can move the memory card to the insertion position and the ejection position, so that further description of the insertion and removal mechanism is omitted.

As is well known, the memory card includes an information storage circuit, and a signal land group L connected to a memory circuit at the end of the insertion side, a power supply land P for supplying a read voltage, and a ground land E are provided. Equipped.

On the other hand, the contact supporting wall 11 of the base member 10 has a signal contact group 21 corresponding to these signal land groups L, a power contact 22 corresponding to the power land P, and a ground land E. The ground contact 23 corresponding to) is supported. The signal contact group 21 is conducted (soldered) to the signal land group 31 on the substrate 30, and each signal land group 31 is connected to a control circuit (signal circuit) 40. As shown in FIG.

The power supply contact 22 and the ground contact 23 are electrically connected to the power supply land 32 and the power supply ground land 33 on the substrate 30, respectively, and are connected to the power supply circuit 41.

24 and 25 are input prohibition contacts supported by the base member 10, and when the both of them are pushed and connected by the input prohibition protrusions set on the memory card, the control call 40 through the input prohibition lands 34 and 35 is carried out. Is applied.

The above is an example of the circuit configuration of a normal memory card connector.

This embodiment constitutes a detection device that detects the insertion of a memory card by using the ground contact 23 and supporting the detection contact 26 newly on the contact support wall 11 of the base member 10.

The relationship between the said ground contact 23 and the insertion detection contact 26 is demonstrated about FIG. 4 thru | or FIG.

The ground contact 23 is a solder angle 23a to be soldered to the power supply ground land 33 of the substrate 30, a fixing portion 23b fixed to the contact support wall 11 of the base member 10, and the high It has the elastic contact angle 23c extended in the insertion part 14 from the top part 23b, and the contact contact end 23d formed in the front free end of the elastic deformation angle 23c. The contact point end 23d is pressed by the ground land E of the memory card MC and contacts the ground land E. At this time, the elastic deformation angle 23c is bent to generate a conduction pressure.

In the elastic deformation angle 23c, an insertion detection tongue piece 23f extending from the fixing portion 23b side toward the contacting contact end portion 23d side is formed by the U-shaped cut portion 23E. The insertion detection tongue piece 23f maintains a contact state between the contact point end 23d and the ground land E while the contact point end 23d is pressed and conducted to the ground land E of the memory card. Only the insertion detecting tongue 23f has an independent elasticity that can be bent.

On the other hand, the insertion detection contact 26 includes a solder angle 26a soldered to the insertion detection land 36 of the substrate 30, a fixing part 26b fixedly fixed to the contact support wall 11 of the base member 10, An elastic deformation angle 26c extending from the fixing portion 26b on the insertion detecting tongue piece 23f of the ground contact 23, and a contacting end 26d formed at the tip free end of the elastic deformation angle 26c; have. The contact end 26d does not conduct with any part of the ground contact 23 in the free state, but is pressed by the ground land E of the memory card MC (or the back of the memory card other than the ground land E). It is elastically deformed on the insertion detection tongue piece 23f side of the ground contact 23, and a part of elastic deformation angle 26c is made to contact the insertion detection tongue piece 23f. The contact end 26d is located close to the contact support wall 11 at the contact point end 23d, and the contact point end 23d is first stored when the memory card is inserted into the insert 14 of the base member 10. The elastic end is pushed against the card, and the contact end 26d is pressed against the memory card to elastically deform. The lead angle 26a of the insertion detection contact 26 described above is conducted to the insertion detection land 36 on the substrate 30, and the insertion detection land 36 and the power supply ground land 33 are inserted detection circuits 42. )

The apparatus of the above configuration can detect the insertion of the memory card MC as follows.

In the form before inserting the memory card MC of FIG. 6 into the insertion portion 14 of the base member 10, the ground contact 23 and the insertion detection contact 26 are not electrically connected, and the insertion detection circuit 42 No insertion detection signal is sent. When the memory card is inserted from the state shown in FIG. 6, the ground land E first contacts the contact point 23d of the ground contact 23 to bend the elastic deformation angle 23c downward.

Therefore, in this insertion step, the ground land E of the memory card is grounded.

Furthermore, when the memory card is inserted, the ground land E contacts the landing end 26d while maintaining the conduction state with the landing contact end 23d of the ground contact 23, thereby moving the elastic deformation angle 26c downward in the drawing. Bend to

Then, part of the elastic deformation angle 26c is conducted with the insertion detecting tongue 23f, and the insertion detecting circuit 42 detects the insertion of the memory card (Fig. 8).

That is, the insertion detecting tongue 23f can be displaced independently from the ground contact 23 to the extent that the ground contact 23 does not fall from the ground land E when pushed by the detection contact 26.

In other words, the insertion detecting tongue 23f does not inhibit the conduction relationship between the contacting contact end 23d and the ground land E of the memory card when the insertion detecting tongue piece 23f is pressed by the elastic deformation angle 26c and elastically deformed.

When the memory card is inserted, the power supply contact 22 contacts the power supply land P of the memory card, and a read voltage is applied to the memory card through the power supply circuit 41. At the same time, a plurality of signal contact groups 21 are stored in the memory. The information stored in the information storage circuit of the memory card in contact with the signal land group L of the card is read by the control circuit 40. This read operation is not different from the conventional one.

In the above embodiment, the insertion detecting tongue 23f of the ground contact 23 is formed in the elastic deformation angle 23c by forming a U-shaped cutout 23E at the elastic deformation angle 23c. ) May be provided in parallel with the elastic deformation angle 23c.

In addition, in the above embodiment, if the ground contact 23 is the ground contact of the power supply circuit 41, but the ground contact 23 is grounded, the power supply circuit need not be the ground contact.

9 shows the embodiment by model.

The card insertion detecting device is generally applicable to the detachment mechanism of a small thin card in addition to the memory card connector.

As described above, the present invention makes it possible to configure one surface of a pair of detection contacts necessary for the insertion detection of a card with a ground contact, so that a small and small number of card insertion detection devices can be obtained.

Claims (4)

A base member having an insertion and removal portion of a card having a ground land; A ground contact installed in the base member so as to correspond to the ground land of the card and to be connected to the ground land when the card is inserted; An insertion detecting tongue piece formed by connecting a base portion to a corresponding ground contact to a part of the ground contact and freeing the tip thereof; A detection contact supported to contact the insertion detection tongue when displaced by a card inserted in the base member; And And a detection circuit for detecting the insertion of the card by contact between the insertion detection tongue and the detection contact. The method of claim 1, And the insertion detecting tongue is capable of being displaced independently from the ground contact so that the ground contact does not fall from the ground card when pushed by the detection contact. The method according to claim 1 or 2, And the ground contact and the sensing contact are displaced in the order of the ground contact and the sensing contact when the card is inserted into the inserting portion of the base member. The method according to any one of claims 1 to 3, The ground contact is formed at a portion of the elastic deformation angle and a contact portion contacting the ground contact of the elastic deformation angle extending from the fixing portion and the ground land of the card formed at the free end of the elastic deformation angle portion and the elastic deformation angle. With insert tongue The detection contact piece is inserted into the insertion detection piece when it is pushed and displaced by a fixed portion to the base member and an elastic deformation angle extending from the fixing part onto the insertion detection piece of the ground contact, and a card formed at the free end of the elastic deformation angle. And a landing end for contacting the elastically deformed corner portion.