JP3507381B2 - Card connector - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a card connector attached to an electronic device such as a mobile phone, a telephone, a PDA (personal digital assistance), a portable audio device, and a camera. The present invention relates to a structure for preventing deformation.

[0002]

2. Description of the Related Art In electronic equipment such as mobile phones, telephones, PDAs, cameras, etc., an IC for CPU or memory
SIM (subscriber identity module) with built-in
Card, MMC (multi media card) card, SD (su
By installing an IC card such as a per density; secure digital) card, various functions are expanded.

In such a connector structure for detachably mounting an IC card, a plurality of contact terminals connected to various signal processing circuits and power supply circuits on the electronic equipment side in which the connector is mounted are housed in a connector housing. An IC in which a plurality of contact terminals are provided
A plurality of contact terminals formed on the front surface or the back surface of the card are brought into contact with each other, and the IC card is electrically connected to the electronic device to which the connector is attached via these contact terminals.

Of the above IC cards, the SD card has a shape as shown in FIGS. Figure 1
1 (a) is a card top view, FIG. 11 (b) is a front view, and FIG. 11 (c)
11A is a sectional view taken along line AA of FIG. 11A, and FIG. 12 is a bottom view of the card.

In these figures, the SD card 20 has an upper body portion 21 having a thickness a. A chamfer 22 for preventing erroneous insertion is provided at the right end of the upper body 21. On the back surface side of the upper body portion 21, a lower body portion 23 having a predetermined thickness b that is slightly narrower than the upper body portion 21 is formed. That is, in the card 20, stepped portions 24 are formed at both end portions along the card side end.

A plurality of recesses (grooves) 26 are formed by a plurality of partition walls (dividing walls) 25 on the tip side of the lower main body 23, and contact pads 27 are formed on the bottom surfaces of these recesses 26.
Is provided. The depth of each recess 26 is equal to that of the lower main body 23.
Thickness b of each contact pad 2
The surface of 7 is located away from the front surface of the upper body 21 by the thickness a of the upper body 21.

A slidable write protect button 28 is arranged on the side surface of the card 20, and the write protect button 28 is slid to one position to prohibit data writing to the card 20.

As a connector for loading a card having a two-stage structure such as the SD card, the present applicant has
Japanese Patent Application No. 11-316110 dated November 5, 1999
No., invention title "card connector structure" is applied.

According to the invention of this application, a two-layer thick card 20 such as the SD card, and a single-layer thin card (for example, MMC card) having substantially the same thickness a as the upper main body portion 21 of the SD card 20. ) And a common connector for both sides, a pair of two-sided thick card 20 supports both side ends of the upper body portion 21 and one-sided thin card and guides their insertion and removal movements. By forming guide grooves on both inner side walls of the connector housing, and by supporting the portions of both cards having the same thickness a by the guide grooves, when each card is supported by the connector, the contact pad 27 of each card is connected to the connector. The contact terminals have the same distance, and each card is brought into contact with the contact terminals with the same contact pressure.

FIG. 13 shows a connector 100 of the invention of this application.
2 shows a state in which the SD card 20 is normally loaded, and a plurality of contact terminals 102 are arranged in parallel on the lower plate of the connector housing 101. The connector housing 101 is provided with an abutting wall 103 for abutting the inserted IC card 20, and the abutting wall 1
The chamfered portion 22 of the IC card 20 is provided at one corner of 03.
The corner wall 104 is formed so as to abut. On both inner side walls of the connector housing 101,
The guide groove 105 described above is formed, and the pair of guide grooves 105 support the side end of the upper main body portion 21 of the card 20.

In FIG. 13, since the card 10 is normally inserted, the contact terminal 1 of the connector 100 is
The contact part 102a of 02 is the contact pad 2 of the SD card 20.
It is in contact with 7 with an appropriate contact pressure.

[0012]

In the above connector, as shown in FIG. 14, when the card 20 is mistakenly inserted with its front and back reversed, the card 20 has its rear end wall 29 abutted on the corner wall 104. It can be inserted into the connector 100.

However, when the card is inserted upside down to such a position, the contact portion 102a of the contact terminal 102 is excessively pressed by the bottom surface of the card 20, as shown in FIG. As a result, the contact terminal 102 is excessively displaced and exceeds the elastic limit, and there is a problem that the contact terminal 102 is plastically deformed.

The present invention has been made in consideration of such circumstances, and provides a card connector capable of surely preventing the contact terminals from being deformed even when the card is inserted erroneously with its front and back reversed. This is a problem to be solved.

[0015]

According to one aspect of the present invention,
An upper body having a chamfered portion at the tip corner, a lower body having a width slightly narrower than the upper body and having a plurality of recesses formed in parallel by a plurality of partition walls on the tip side, and the plurality of recesses. Each contact pad has a contact pad provided on both sides thereof, and a step portion formed by the bottom surface of the upper body portion and the bottom surface of the lower body portion is formed along the card side edge. In a card connector which is held in a connector housing so as to abut with contact portions of a plurality of elastically deformable contact terminals disposed therein, a pair of guide grooves for supporting and guiding both end portions of the card are formed in the connector housing. In addition, the plurality of contact terminals may be provided with a protrusion that fits into any of the plurality of recesses of the card when the card is loaded. It has to.

According to the invention, when the card is properly inserted, the convex portion formed on the contact terminal fits into the concave portion of the contact pad portion of the card. Of course, at this time, the contact between the contact pad of the card and the contact terminal of the connector is not hindered by the convex portion.

On the other hand, when the card is inserted erroneously with its front and back reversed, this convex portion functions as a stopper to stop the insertion of the card before the contact terminal is displaced beyond the elastic limit. You can

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 is a plan view showing an embodiment of a card connector according to the present invention, FIG. 2 is a partially cutaway plan view showing an essential portion of the present invention, and FIG. 3 is a direction of an arrow D in FIG. FIG. 4 is a front view seen from above, and FIG. 4 is a partially enlarged view of FIG. 3. Further, FIG. 5 is a view showing a state of the IC card and the connector before the card is inserted. In addition, the connector cross-sectional view shown in the lower right of FIG.

This card connector 1 is a mobile phone, P
It is provided in electronic devices such as DAs, portable audios, and cameras.

The connector 1 shown in FIGS. 1 to 5 can be loaded with a two-step thick card 20 having a step, such as the SD card shown in FIGS. 11 and 12. Further, a one-step thin card such as an MMC card having the same shape, size and thickness a as the upper body 21 of the SD card 20 can be loaded.

1 to 5, the card connector 1
Has a connector housing 30 integrally molded with an insulating material such as a resin material.

The IC card 20 is inserted into the connector 1 through the card insertion port 11 formed on the front surface of the housing 30.

In the housing 30, as shown in FIG.
Abutting wall 12 for abutting the inserted IC card 20
The corner wall 13 is formed at one corner of the abutment wall 12 so as to abut the chamfered portion 22 of the IC card 20.

Here, as shown in FIG. 3, the IC card 20 is guided in the inserting / removing direction with its both end portions supported by a pair of guide grooves 14a, 14b formed on both inner side walls of the housing 30. It

One of the guide grooves 14a is the front end portion 1 of the housing.
9 from the corner wall 13 to the other guide groove 1
4b extends from the front end 19 of the housing to the butting wall 12.

Each of the guide grooves 14a, 14b has a top wall 15,
It is formed by the side wall 16 and the lower surface wall 17.

Further, a side wall 18 is formed so as to extend downward from the edge of the lower surface wall 17 of each guide groove 14a, 14b.

Lower plate 3 which constitutes the lower wall of the housing 30
1 has a plurality of grooves 32 for positioning and fixing the plurality of contact terminals 40.

Each contact terminal 40 has a power supply terminal,
Signal terminals etc. are included. Each contact 40 is connected to a contact pad of a printed wiring board of an electronic device by soldering to a terminal portion 40a, a fixing portion 40b for fixing in the groove 32, and elastically displaced to contact the contact pad 25 of the card 20. It has a contact spring piece 40c in contact therewith. The contact spring piece 40c has a protruding contact portion 40d.

A recess 3 into which the left and right ends of the fixed portion 40b of the contact terminal 40 are press-fitted is formed on both side walls forming the groove 32.
4 (see FIG. 4) are formed, and the fixed portions 40b of the contact terminals 40 are supported and fixed by the recesses 34.

Then, these plurality of contact terminals 4
No. 0 makes electrical connection between the card 20 and the electronic device, and elastic force thereof gives a proper card holding force when the card is loaded.

Here, the contact terminal 50 located on the rightmost side when viewed from the card insertion port 11 has a shape as shown in FIG. 6, unlike the other contact terminals 40.

This contact terminal 50, like the other contact terminals 40, has a terminal portion 50a soldered to a contact pad of a printed wiring board of an electronic device, a fixing portion 50b for fixing in the groove 32, and an elastic member. Has a contact spring piece portion 50c that is displaced to contact the contact pad 25 of the card 20, and has a protruding contact portion 5 at its tip.
It has 0d. The fixing portion 50b has linear grooves (not shown) formed in recesses 34 formed on both side walls of the groove 32.
A protrusion 50e for positioning and fixing is formed so as to engage with.

Further, the contact terminal 50 has bent pieces 50f extending from the fixed portion 50b to the tip side on both sides thereof, and the tip end of the bent piece 50f has a lower plate 31 of the connector housing 30. It is a convex portion 50g protruding upward from.

These protrusions 50g formed on the contact terminals 50 are located in the chamfered portion 22 of the plurality of grooves 26 in which the contact pads 27 of the card 20 are arranged when the card is normally loaded. The arrangement position, width, and height are set so as to fit in the groove 26a.

The pair of convex portions 50g function as stoppers for preventing the card 20 from being inserted all the way when the card 20 is erroneously inserted backwards and forwards.

In this case, the convex portion 50g is not formed on the contact spring piece portion 50c of the contact terminal 50, but is arranged on both sides of the convex portion 50g when the card 20 is normally inserted. This is to prevent the elastic displacement operation of the spring piece portion 50c from being hindered.

FIG. 7 shows a state where the card 20 is normally inserted.

When the card 20 is inserted into the connector 1,
Both side surfaces of the upper body portion 21 of the card 20 have guide grooves 14a,
14b is guided by each side wall 16 of the bottom body 14b, and both end portions of the bottom surface of the upper body portion 21, that is, the step portion 24 are
7 and supports the upper body 21 so that the card 20 is not lifted by the elastic force of the contact terminal 40.
Both end portions of the upper surface of the are restricted by the upper surface wall 15. The lower body 23 of the card 20 is housed in the housing space sandwiched by the side walls 18.

The chamfered portion 22 of the card 20 is the corner wall 1
It can be inserted to a position where it abuts against the front wall 3 and the abutment wall 12. Card 20 until this state
When is inserted, the stopper protrusion 50g formed on the contact terminal 50 fits into the groove 26a formed behind the chamfered portion 22 of the card 20. At this time, the contact portion 50d of the contact terminal 50 is
It is pressed and elastically deformed by the contact pad 27 provided in the groove 26a and comes into contact with the contact pad 25 with an appropriate contact pressure. Of course, the other contact terminal 40 also comes into contact with the other contact pad 27 with an appropriate contact pressure.

FIG. 8 shows a state in which the card 20 is erroneously inserted with its front and back reversed.

Also at this time, the card 20 can be inserted into the connector while the upper wall of the step portion 24, that is, the upper body portion 21 is supported by the guide grooves 14a and 14b. However, since the groove 26 like the front end side is not formed on the rear end side of the card 20, if the card 20 is inserted erroneously with its front and back reversed, the card 20 may be inserted at a stage where the card 20 is inserted to some extent. The rear end wall 29 hits the stopper projection 50g formed on the contact terminal 50, and further insertion becomes impossible. Therefore, according to this connector, since the card 20 is not inserted further unlike the conventional case, the contact terminal 40 is not overloaded and is not displaced beyond the elastic limit.

As described above, in this embodiment, since the stopper structure 50g is formed on one contact terminal 50, when the card is inserted by mistake, the contact terminals 40 and 50 have elastic limits. The insertion of the card 20 can be stopped before the displacement exceeding the above is given, whereby the plastic deformation of the contact terminals 40, 50 can be prevented in advance.

FIG. 9 shows another embodiment of the present invention. In this embodiment, the stopper protrusion 50g formed on the contact terminal 50 has a structure in which a metal piece is folded back, and the strength of the stopper portion is increased. Is getting bigger.

FIG. 10 shows another embodiment of the present invention. In this embodiment, the stopper projection 50g has a structure in which metal pieces are folded back to increase the strength of the stopper and Contact terminals 40, 5
The contact points 40d and 50d of 0 are also folded back.

In the above-described connector 1 of the present embodiment, the cantilevered contact terminals 40, 50 have their terminal portions 40a, 50a located on the front side of the connector 1 and the contact portions 40d, 50d. Since the connector 1 is arranged so as to be located on the back side of the connector 1, the area occupied by the connector 1 can be reduced as compared with the case where this is reversed.
That is, when the arrangement direction of the contact terminals 40 and 50 is reversed, the terminal portion 40a is exposed to the outside of the housing of the connector 1, and the occupied area increases accordingly.

By the way, the stopper projection 50g does not interfere with the contact between the contact terminal 40 and the contact pad 27 when the card 20 is loaded, and can be fitted into any of the grooves 26 of the card 20. It can function as the stopper described above. That is, the stopper projection 50g is not necessarily provided on both sides of the contact spring piece 50c of the contact terminal 50 as in the above-described embodiment, but is provided so as to cover the contact spring piece 50c from above. It is also possible.

In the above embodiment, the protrusion 50g is provided on both sides of the contact spring piece 50c, but the protrusion 50g may be provided on only one side.

In the above embodiment, the contact portion of the plurality of contact terminals is located closest to the front side of the connector, that is, the contact terminal 50 located closer to the corner wall 13 is a stopper. Projection 50g
However, the same convex portion may be provided for the other contact terminal 40, or the convex portion may be provided for a plurality of contact terminals.

Further, in the above embodiment, the guide grooves 14a and 14b formed in the connector housing 30 are used to form the card 2
Although it is arranged to support both side edges of the upper main body 21 of 0,
With this guide groove, the bottom surface of the card 20, that is, the lower main body 2
Even in the case of a connector structure that supports 3, the same effect as described above can be obtained by providing the protrusion 50g.

Further, in the above embodiment, the upper plate of the connector housing 30 covers only the vicinity of the guide grooves 14a and 14b and the abutting wall 12, but it covers the entire surface of the card, or most of it. May be.

Further, the connector housing may be composed of a plurality of housing members such as an upper housing made of sheet metal and a lower housing made of resin.

[0054]

As described above, according to the present invention,
The contact terminal has a protrusion that fits into one of the recesses formed in the contact pad of the card when the card is loaded. The convex portion functions as a stopper, which allows the insertion of the card to be stopped before the displacement exceeding the elastic limit is given to the contact terminal. Therefore, it is possible to surely prevent the plastic deformation of the contact terminal.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of a card connector according to the present invention.

FIG. 2 is a partially broken plan view showing an embodiment of a card connector according to the present invention.

FIG. 3 is a front view showing an embodiment of a card connector according to the present invention.

FIG. 4 is a partially enlarged front view showing the embodiment of the card connector according to the present invention.

FIG. 5 is a two-sided view showing a state of an IC card and a connector before insertion of a card connector according to an embodiment of the present invention.

FIG. 6 is a three-view drawing showing a contact terminal in which a stopper projection is formed in the embodiment of the card connector of the present invention.

FIG. 7 is a two-sided view showing a state of the connector when the card is properly inserted in the embodiment of the card connector according to the present invention.

FIG. 8 is a two-sided view showing a state of the connector when the card is erroneously inserted in the embodiment of the card connector according to the present invention.

FIG. 9 is a cross-sectional view showing another embodiment of the present invention.

FIG. 10 is a sectional view showing another embodiment of the present invention.

FIG. 11 is a trihedral view illustrating a card to which the present invention is applied.

FIG. 12 is a bottom view illustrating a card applied to the present invention.

FIG. 13 is a two-sided view showing a prior art.

FIG. 14 is a two-sided view showing a defect of the prior art.

[Explanation of symbols]

1 card connector 11 Card slot 12 butting wall 13 corner walls 14a, 14b Guide groove 15 Top wall 16 Side wall 17 Bottom wall 18 Side wall 20 thick two-tiered card 21 Upper body 22 Chamfer 23 Lower body 24 steps 25 partitions 26 recess (groove) 27 contact pads 29 rear end wall 30 connector housing 31 Lower plate 32 grooves 34 recess 40 contact terminals 40a terminal part 40b fixed part 40c Contact spring piece 40d contact part 50 contact terminals 50a terminal part 50b fixed part 50c Contact spring piece 50d contact part 50e protrusion 50f bent piece 50g stopper protrusion

Front page continuation (72) Inventor Takaaki Furuta 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (56) References JP 2001-160458 (JP, A) JP 10-91729 (JP, A) JP-A-11-329633 (JP, A) JP-A-2001-143789 (JP, A) Actually developed 62-5363 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) G06K 17/00 H01R 13/56-13/72 H01R 12/18 H01R 16/64-13/645

Claims (6)

(57) [Claims] 1. An upper body portion having a chamfered portion at a tip corner portion, a lower body portion having a width slightly narrower than that of the upper body portion, and a plurality of concave portions formed by a plurality of partition walls formed in parallel on the tip side, A card having contact pads provided in the plurality of recesses and having step portions formed by the bottom surface of the upper body portion and the bottom surface of the lower body portion at both end portions along the card side edge, In a card connector that holds a contact pad in a connector housing such that the contact pads respectively contact the contact portions of a plurality of elastically deformable contact terminals arranged in the connector housing, a pair of supporting and guiding both side ends of the card are provided. A guide groove is formed in the connector housing, and a protrusion that fits into any of the plurality of recesses of the card when the card is loaded is provided with the plurality of contacts. Card connector being characterized in that the provided child. 2. The convex portion projects higher than a lower plate of the connector housing and is located between a card insertion opening of the connector housing and a contact portion of the contact terminal. The card connector described in 1. 3. The card connector according to claim 1, wherein the protrusions are provided on both sides of the contact terminal. 4. The card connector according to claim 1, wherein the plurality of contact terminals are fixedly supported in a plurality of grooves formed in a lower plate of the connector housing. 5. The plurality of contact terminals are elastic spring pieces extending along the card insertion direction, and the plurality of elastic spring pieces have ends for electrical connection located on the front side in the card insertion direction. The card connector according to any one of claims 1 to 4, wherein a contact portion that comes into contact with the contact pad is located on the inner side. 6. The pair of guide grooves support each side end of the upper main body of the card to guide the insertion / removal of the upper main body, and the guide groove is provided below a space sandwiched between the pair of guide grooves. The card connector according to claim 1, wherein a side wall for defining a space for accommodating the lower main body of the card is formed in the housing.