JP5090510B2 - Memory card connector - Google Patents

Description

  The present invention relates to a memory card connector for connecting a memory card accommodated in a card accommodating portion to an electronic device, and more particularly, a memory having an erroneous insertion prevention mechanism for restricting insertion of a memory card to be inserted in an erroneous posture. The present invention relates to a card connector.

  Conventionally, as shown in FIG. 8, the memory card 10 such as a large SD card has an inclined surface 10a formed on one side of the front surface in the insertion direction to be inserted into the card accommodating portion. In the memory card connector 100 to be connected to the memory card 10 with the inclined surface 10a, as shown in FIG. 11, an erroneous insertion preventing projection 101 or the like is formed at a portion lacking by the inclined surface 10a of the memory card 10. The insertion of the memory card 10 that is to be inserted into the card accommodating portion 103 in a posture in which the front and back sides and the front and back sides are reversed (hereinafter referred to as an erroneous posture) is excluded (Patent Document 1).

On the back surface of the memory card 10, a plurality of concave grooves 11, 11... Are formed along the front edge from the front edge to the rear, and the conductive pads 12, 12. However, when the inclined surface 10a is formed, the conductive pad 12a at that portion is exposed slightly rearward (downward in FIG. 8) from the other conductive pads 12. Therefore, as shown in FIG. 9, the contact 102a of the memory card connector 100 that contacts the conductive pad 12a is also arranged so as to protrude rearward in the insertion direction as compared to the other contacts 102. The mis-insertion preventing protrusion 101 is erected further rearward of the contact 102a so that the conductive pad 12 does not contact the protruding contact 102a first.
Japanese Patent No. 3924677

  As shown in FIG. 10, the memory card connector 100 provided with the above-described erroneous insertion prevention mechanism has the contact 102a brought into contact with the conductive pad 12a of the memory card 10 inserted in a normal posture. 101 had to be a height that passes through the groove 11 and the height was limited. For example, the depth of the concave groove 11 is about 0.5 mm, and the erroneous insertion preventing projection 101 needs to be at least a height of 0.5 mm or less.

  On the other hand, the card housing portion 103 is often covered with a cover 104 made of an elastic material such as a metal plate in order to shield the contacts 102 and the memory card 10. When the cover 104 bends, it may get over the erroneous insertion prevention protrusion 101 and the erroneous insertion prevention function may not be performed.

  In addition, the erroneous insertion preventing projection 101 needs to be disposed in the concave groove 11 that does not contact the memory card 10 behind the contact 102a that contacts the conductive pad 12a. Since the thickness could not be taken and the strength could not be obtained, the memory card 10 inserted in the wrong posture was in contact and easily damaged.

  Furthermore, it is necessary to accurately form minute protrusions 101 on the inner surface of the case constituting the card housing portion 103, and the mold structure for manufacturing the case is complicated, and strict manufacturing accuracy is required.

  The present invention has been made in consideration of the above-described conventional problems, and provides a memory card connector that can reliably prevent an erroneously inserted memory card from being inserted with a simple configuration without processing a case. The purpose is to do.

  In order to achieve the above-described object, the invention according to claim 1 includes a case in which a plurality of contact pieces are attached insulated from each other, and a memory card that covers the upper surface of the case and is inserted from the rear to the front. A memory card having a cover formed between the card storing portion and the case and having an inclined surface for preventing erroneous insertion between the front surface and one side surface in the inserting direction is stored in the card storing portion. Memory card connector in which each of the contacts comes into contact with a plurality of conductive parts exposed in front of the memory card when crossing the insertion direction of the memory card from the base end on the center side of the cover. A plate spring piece that is cantilevered toward the cover is integrally formed, and at least the free end of the plate spring piece is inclined downward with respect to the cover to form an erroneous insertion prevention plate portion. Rear sides, faces the card accommodating section perpendicular to the insertion direction of the memory card, the most important feature memory card connector across the movement locus of the inclined surface of the memory card inserted into the card accommodation portion.

  The inclined surface of the memory card inserted into the card accommodating portion in the normal posture abuts on the lower end of the rear side surface of the erroneous insertion preventing plate portion that crosses the movement locus of the inclined surface. The rear side of the erroneous insertion prevention plate faces the card compartment in a direction perpendicular to the memory card insertion direction, so that the contact position with the memory card shifts to the free end side as the memory card is inserted forward. As a result, the whole of the erroneous insertion preventing plate portion is guided so as to be retracted upward from the card accommodating portion, and the memory card can be further inserted forward. On the other hand, a memory card inserted in an incorrect posture has a surface that is perpendicular to the insertion direction other than the inclined surface abuts substantially parallel to the rear side surface of the misinsertion prevention plate portion. In addition, since the card is not retracted from the card housing portion, the further forward insertion of the memory card is restricted.

  The invention according to claim 2 is characterized in that the cover is formed of a conductive metal plate, the cover is cut out in a substantially U shape, and a leaf spring piece is cut and raised from a part of the cover. And

  A cover made of a conductive metal plate is cut out in a substantially U shape in a direction crossing the insertion direction of the memory card, thereby forming a leaf spring piece that is cantilevered inside. An erroneous insertion prevention plate portion is formed simply by bending the free end side of the leaf spring piece that intersects the movement locus of the inclined surface in the vertical direction downward and facing it into the card accommodating portion.

  The invention according to claim 3 is characterized in that the leading end of the erroneous insertion preventing plate portion protrudes rearward from the rear side surface on the base end side.

  Since the erroneous insertion prevention plate portion is inclined downward with respect to the cover, the rear side surface of the distal end protrudes rearward at the lowest position from the base end side. Even if a memory card with a curved upper and lower surface in the insertion direction is inserted in an incorrect posture, the rear side of the tip first comes into contact with the front surface below the curved surface, and the erroneous insertion prevention plate part is not guided upward. Insertion is restricted. In addition, when a memory card that is inserted in a normal posture is inserted, the middle of the rear side of the erroneous insertion prevention plate part first contacts the inclined surface of the memory card, and the contact position shifts to the free end side. As a result, the erroneous insertion prevention plate part is retracted upward from the card housing part, and the memory card can be further inserted forward.

  The invention according to claim 4 is characterized in that the upper surface of the leaf spring piece is formed wider from the free end toward the base end.

  The memory card inserted in front is in contact with the rear side, and the largest bending moment is generated at the base end of the leaf spring piece that is cantilevered. However, the section modulus increases toward the base end. The leaf spring piece is less likely to be damaged by the bending.

  The invention according to claim 5 is characterized in that a guide surface that is inclined downward is formed between the rear side surface and the lower surface of the erroneous insertion preventing plate portion.

  Since the inclined surface of the memory card inserted in a normal posture comes into contact with the guide surface inclined downward, the erroneous insertion preventing plate portion is guided to retreat upward. In the memory card inserted in the wrong posture, the front surface in the insertion direction comes into contact with the rear side surface parallel in the vertical direction and does not come into contact with the guide surface, so that the erroneous insertion prevention plate portion is not guided upward.

  According to the first aspect of the present invention, the card spring is received in a wrong posture with a simple structure in which the leaf spring piece is formed on the cover with the free end facing the card receiving portion in a direction crossing the insertion direction of the memory card. The insertion of the memory card inserted into the card can be surely eliminated.

  Further, since the leaf spring piece having the erroneous insertion preventing plate portion is formed on the cover, it can be used together with the erroneous insertion preventing projection frame portion formed on the conventional case side, and insertion of the wrong posture can be prevented more reliably.

  According to the invention of claim 2, the leaf spring piece having the erroneous insertion preventing plate portion can be formed from the card forming the card housing portion without using a new part.

  The leaf spring piece cut and raised from the cover has a large section modulus in the direction in which the memory card abuts on the rear side surface, so that a large bending stress does not occur in the insertion direction of the memory card and is not easily damaged.

  The cover for shielding contacts and memory cards can be used to form an incorrect insertion prevention plate with a simple press process.

  According to the third aspect of the present invention, even if curved surfaces are formed at the top and bottom of the front surface in the memory card insertion direction, the memory card inserted in the wrong posture has a vertical flat surface on the front surface on the rear side surface of the erroneous insertion prevention plate portion. The insertion is reliably restricted.

  According to the invention of claim 4, it is possible to restrict the insertion of the memory card to be inserted in a wrong posture without the plate spring piece being plastically deformed.

  According to the fifth aspect of the present invention, the inclined surface of the memory card inserted in a normal posture abuts on the guide surface, and the erroneous insertion preventing plate portion is more securely retracted from the card housing portion.

It is the perspective view which looked at the state which inserts the memory card 10 with the normal attitude | position in the memory card connector 1 which concerns on one embodiment of this invention from diagonally forward upper direction. 2 is an exploded perspective view of a case 2 and a cover 3. FIG. (A) of cover 3 is a top view, (b) is a principal part perspective view (c) which shows leaf spring piece 4, and is an AA line sectional view of (b). (A) in a state where the memory card 10 is inserted in a normal posture into the memory card connector 1 indicated by a wavy line in the cover 3 is a perspective view as viewed obliquely from above, and (b) is a perspective view of relevant parts. (A) in a state in which the memory card 10 is inserted into the memory card connector 1 in a normal posture is a plan view of the main part, (b) is a longitudinal sectional view cut along the leaf spring piece 4, and (c) is It is BB sectional drawing of (a). (A) in a state in which the memory card 10 is inserted into the memory card connector 1 in an incorrect posture is a plan view of the main part, (b) is a longitudinal sectional view cut along the leaf spring piece 4, and (c) is It is CC sectional view taken on the line of (a). It is a principal part perspective view which shows the state which inserted the memory card 10 in the incorrect attitude | position in the memory card connector 1 which shows the cover 3 with a wavy line. 2 is a bottom view of the memory card 10. FIG. It is a perspective view which shows the state which inserts the memory card 10 in the conventional memory card connector 100. FIG. It is a longitudinal cross-sectional view which shows the state which inserts the memory card 10 with the normal attitude | position in the conventional memory card connector 100. FIG. It is a longitudinal cross-sectional view which shows the state which inserted the memory card 10 in the conventional memory card connector 100 accidentally.

  A memory card connector 1 according to an embodiment of the present invention will be described below with reference to FIGS. 2 will be described with the cover 3 side in FIG. 2 as the upper side, the case 2 side as the lower side, the vertical direction in FIG. 3A as the front-rear direction, and the left-right direction as the left-right direction. As shown in FIG. 2, the memory card connector 1 includes a case 2 in which a concave portion is formed on the inside by a U-shaped frame portion along the periphery except for the rear, and along the upper surface of the case 2. The conductive metal cover 3 is assembled, and the metal cover 3 covers the concave portion of the case 2 from above, thereby forming a card accommodating portion 6 for accommodating the memory card 10 therebetween.

  The case 2 is formed of an insulating synthetic resin, and a large number of contacts 5 are integrally attached to the front side of the case 2 along the front-rear direction when the case 2 is formed. The contact portion behind each contact 5 protrudes into the card housing portion 6 and comes into contact with the conductive pad 12 of the memory card 10 inserted into the card housing portion 6 in a normal posture. As shown in FIG. 7, among the contacts 5, the contact 5 a that contacts the conductive pad 12 a exposed to the rear of the inclined surface 10 a of the memory card 10 is slightly behind the other contacts 5 and the contact portion accommodates the contact. It is attached so as to face the inside of the portion 6, and the periphery including the rear is surrounded by an erroneous insertion prevention frame portion 7. The erroneous insertion prevention frame portion 7 functions in the same manner as the conventional conventional erroneous insertion prevention projection 101. Therefore, its height passes through the concave groove 11 of the memory card 10 without interference. The height is 0.5 mm or less.

  A discharge plate 13 slidable before and after the contact portion of the contact 5 is spanned between the left and right frame portions of the case 2, and this discharge plate 13 is a compression spring 14 mounted in the right frame portion of the case 2. The well-known push-push type eject mechanism is constructed by urging the rear and the link whose tip engages with the heart cam groove formed in the front right frame part. The That is, when the memory card 10 inserted in a normal posture contacts the discharge plate 13 and is inserted further forward against the compression spring 14, the link engages with the lock position of the heart cam groove, and the discharge plate 13 is locked. The memory card 10 is held even if the insertion force is released in a state where the memory card 10 is connected to the contact 5. Further, when the memory card 10 is further pushed in from this state, the link is released from the lock position of the heart cam groove, and is biased by the compression spring 14 and the memory card 10 is ejected from the card accommodating portion 6 by the ejection plate 13.

  In the vicinity of the opening of the card accommodating portion 6 further rearward between the left and right frame portions of the case 2, a shutter 15 is rotatably spanned. The shutter 15 covers the vicinity of the opening of the card storage unit 6 in which the memory card 10 is not stored, and prevents dust from entering the card storage unit 6. Further, the engaging portion 15a of the shutter 15 engages with a pair of V-shaped detection pieces 16 and 16 formed at left and right separated positions on the metal cover 3 side so as to cover the vicinity of the opening of the card housing portion 6. When the memory card 10 is inserted at an angle other than the insertion direction in the front-rear direction, the rotation is restricted without releasing the engagement with the one V-shaped detection piece 16, and the memory card in the direction other than the front-rear direction is restricted. 10 is inserted into the card accommodating portion 6.

  Furthermore, the height h of the engaging portion 15a of the shutter 15 from the inner bottom surface of the card housing portion 6 is slightly lower than the thickness of the prescribed memory card 10 connected to the memory card connector 1. As a result, even if a memory card thinner than the height h of the engaging portion 15a is to be inserted into the card housing portion 6, the pair of V-shaped detection pieces 16, 16 are pushed up to release the engagement with the shutter 15. Cannot be inserted, and insertion into the card housing portion 6 is restricted.

  As shown in FIG. 2, the metal cover 3 can be attached to cover the concave portion of the case 2 by bending the left and right sides of the rectangular conductive metal plate so as to surround the left and right frame portions of the case 2 from the outside. In addition to the above-described one V-shaped detection piece 16 being cut and raised on the rear side of the plane, the plane is substantially U toward the right in a plane slightly behind the contact 5a attached to the case 2. By being cut out in a letter shape, the leaf spring piece 4 is integrally formed inside thereof. Here, the “substantially U-shape” includes all shapes formed in the shape of an elongated strip leaving one side on the base end side in addition to the V-shape.

  As shown in FIGS. 3 (a) and 3 (b), the leaf spring piece 4 is cantilevered integrally with the center side of the plane of the metal cover 3 as the base end 4a toward the right, and then viewed in the vertical direction. The side edge 4b is parallel to the left-right direction and is orthogonal to the insertion direction of the memory card 10. On the other hand, the front side 4c is inclined rearward toward the right, whereby the width in the front-rear direction of the leaf spring piece 4 is increased from the free end toward the base end, and around the neutral axis in the vertical direction. The section modulus is increased toward the base end 4a. As will be described later, the leaf spring piece 4 receives the insertion force forward from the memory card 10 by the erroneous insertion preventing plate portion 8 on the free end side, and the largest bending moment is generated at the proximal end 4a. Since the bending modulus can be reduced with a maximum section modulus, plastic deformation hardly occurs even when a strong insertion force is applied.

  Further, the leaf spring piece 4 is bent obliquely downward in the vicinity of the center, and a free end side serves as an erroneous insertion prevention plate portion 8 facing the card accommodating portion 6. As shown in FIGS. 4A and 4B, the erroneous insertion prevention plate portion 8 has a movement trajectory in which the inclined surface 10 a of the memory card 10 inserted forward in a normal posture moves in the card housing portion 6. As shown in FIGS. 5 (a), 5 (b), and 5 (c), the upper end of the inclined surface 10a of the memory card 10 that faces the card accommodating portion 6 so as to cross and is inserted in a normal posture is thereby obtained. It contacts the lower end of the rear side surface 8a of the erroneous insertion prevention plate portion 8.

  The misinsertion prevention plate portion 8 whose base end side is bent obliquely downward faces the card storage portion 6 at its free end, but here, at least the free end and the inner bottom surface of the card storage portion 6 Is less than the height h of the engaging portion 15a of the shutter 15. Thereby, the memory card 10 inserted by rotating the shutter 15 is surely brought into contact with the erroneous insertion preventing plate portion 8 regardless of the insertion posture.

  Moreover, the rear side surface 8d of the free end of the erroneous insertion preventing plate portion 8 is formed so as to protrude rearward from the rear side surface 8a on the base end side, as shown in FIGS. 6 (a) and 6 (c). Yes. Therefore, as shown in FIG. 6C, even if the front upper portion of the memory card 10 inserted in the wrong posture is a curved surface, the rear side surface 8d located at the bottom is the flat front surface of the memory card 10. The memory card 10 does not accidentally come into contact with the lower side of the erroneous insertion prevention plate portion 8, and the erroneous insertion prevention plate portion 8 is not retracted upward.

  In the present embodiment, as shown in FIG. 3 (c), the guide surface 8c facing downward and rearward is formed along the boundary between the rear side surface 8a and the lower surface 8b of the erroneous insertion prevention plate portion 8. The upper part of 10a reliably contacts the inclined surface 8c at the lower part of the rear side surface 8a.

  As shown in FIG. 1, the memory card connector 1 configured as described above is first inserted into the card accommodating portion 6 with the memory card 10 having a normal posture with the inclined surface 10 a as the right front corner. . Even if the memory card 10 is inserted in a normal posture, if the insertion direction is inclined with respect to the front-rear direction, which is the specified insertion direction, or a thin memory card that is less than the specified relative to the height of the card housing portion 6 is used. When inserted, at least one of the pair of V-shaped detection pieces 16, 16 is not pushed upward by the memory card to be inserted, and the engagement with the shutter 15 is not released. It does not rotate in a state of covering the 6 openings. In other words, the memory card 10 in a normal posture is inserted in front of the card housing portion 6 substantially along the front-rear direction.

  As shown in FIGS. 4A and 4B, when the memory card 10 is inserted to the contact position with the erroneous insertion prevention plate portion 8, the erroneous insertion prevention plate portion 8 moves the inclined surface 10a at the right front corner. Since it faces the inside of the card accommodating portion 6 so as to cross the locus, it hits the middle position of the lower portion (guide surface 8c) of the erroneous insertion prevention plate portion 8 whose height from the inner bottom surface is the same height as the memory card 10. Touch. As shown in FIGS. 5A, 5B, and 5C, the erroneous insertion preventing plate portion 8 is inclined downward toward the right side (left side in FIG. 5B). Since the inclined surface 10a is inclined rearward toward the right, the abutting position is a free end side (right side) along the guide surface 8c of the erroneous insertion preventing plate portion 8 as the memory card 10 moves forward. Move to On the other hand, since the height from the inner bottom surface of the inclined surface 10a that contacts the erroneous insertion prevention plate portion 8 does not change, the height of the contact position does not change, and the erroneous insertion prevention plate portion 8 is retracted from the card storage portion 6. Pushed upwards.

  Accordingly, the memory card 10 can be inserted further forward under the erroneous insertion prevention plate portion 8. At this time, since the erroneous insertion prevention frame portion 7 is provided at a portion that does not interfere with the inclined surface 10a of the memory card 10 inserted forward in a normal posture, it passes through the concave groove 11 of the memory card 10, The memory card 10 is inserted to a connection position where each conductive pad 12 contacts the contact 5. In this state, even if the forward insertion force is released, the memory card 10 is held at the connection position by the push-push type eject mechanism described above.

  When the memory card 10 is ejected from the card housing portion 6, when the memory card 10 is further pushed in from the connection position, the memory card 10 is ejected from the card housing portion 6 by the ejection plate 13 that is biased backward by the compression spring 14. Is done. Since the erroneous insertion preventing plate 8 and the one V-shaped detection piece 16 are each made of an elastic piece, when the memory card 10 is ejected, the original position before insertion, that is, the position facing the card accommodating portion 6. The one V-shaped detection piece 16 engages with the engaging portion 15 a of the shutter 15.

  Next, a description will be given of a case where the memory card 10 having the wrong posture with the inclined surface 10a in the rear is inserted into the card housing portion 6 of the memory card connector 1 with the front and back reversed. Even the memory card 10 having such a wrong posture has the same thickness. Therefore, when the memory card 10 is inserted along the front-rear direction, the shutter 15 is disengaged, and the memory card 10 is inserted into the front of the card housing 6. I can do it.

  The erroneously inserted memory card 10 that is rotated forward by rotating the shutter 15 has no inclined surface 10a at the portion where the erroneous insertion preventing plate portion 8 abuts, and the flat vertical surface 10b that curves upward and continues to the upper surface. It has become. On the other hand, in the erroneous insertion prevention plate portion 8 facing the card housing portion 6, the rear side surface 8d of the free end protrudes most backward, so as shown in FIGS. 6 (a), (b), and (c), The lowermost free end of the erroneous insertion prevention plate 8 abuts on the flat vertical surface 10 b of the memory card 10. Therefore, the curved surface above the vertical surface 10b does not come into contact with the lower part on the base end side of the erroneous insertion prevention plate portion 8, and the erroneous insertion prevention plate portion 8 is not pushed up by mistake.

  Since the vertical surface 10b of the memory card 10 with which the free end of the erroneous insertion prevention plate portion 8 abuts is a flat surface orthogonal to the insertion direction, the abutment position does not move, and the erroneous insertion prevention plate portion 8 is the card. It does not evacuate upward from the accommodating part 6. Accordingly, the erroneously inserted memory card 10 is further prevented from being inserted forward by the erroneous insertion prevention plate portion 8 and cannot be inserted to the connection position where each conductive pad 12 contacts the contact 5.

  Since the memory card 10 to be inserted forwardly before and after the contact with the erroneous insertion prevention plate portion 8 does not have the inclined surface 10a at the position of the erroneous insertion prevention frame portion 7, as shown in FIG. Abutting against the insertion preventing frame portion 7, the insertion is restricted. That is, as shown in the figure, the insertion up to the connection position of the memory card 10 inserted in the wrong posture is restricted by one or both of the erroneous insertion prevention plate portion 8 and the erroneous insertion prevention frame portion 7. . Since the memory card 10 inserted up to this position has not reached the connection position, when the insertion force is released, the memory card 10 is ejected from the card accommodating portion 6 by the ejection plate 13 urged rearward by the compression spring 14. Since the erroneous insertion preventing plate 8 and the one V-shaped detection piece 16 are each made of an elastic piece, when the memory card 10 is ejected, the original position before insertion, that is, the position facing the card accommodating portion 6. The one V-shaped detection piece 16 engages with the engaging portion 15 a of the shutter 15.

  In the present embodiment, the erroneous insertion prevention frame portion 7 also restricts the insertion of the memory card 10 in the wrong posture, but if it can be restricted only by the erroneous insertion prevention plate portion 8, it is not necessarily provided.

  In addition, the rear side surface 8d of the free end of the erroneous insertion prevention plate portion 8 protrudes most rearward, but is a plate-shaped memory card in which a curved surface is not formed above the memory card inserted in an erroneous posture. If there is, it is good also considering the back side surface 8a of the erroneous insertion prevention board part 8 as a plane orthogonal to an insertion direction to a free end.

  Further, in the present embodiment, the insertion posture of the memory card 10 in which the conductive pad 12 is exposed in front of the lower surface side has been described as a normal posture. Also good. In this case, since the inclined surface 10a becomes the left front corner, the leaf spring piece 4 is cantilevered from the center of the cover 3 toward the left.

  Suitable for memory card connectors that connect memory cards to electronic devices such as mobile phones.

1 Memory card connector 2 Case 3 Cover (metal cover)
4 leaf spring piece 5 contact 6 card accommodating portion 8 erroneous insertion preventing plate portion 8a rear side surface 8c guide surface 10 memory card 10a inclined surface

Claims (5)

A case in which a plurality of contact pieces are attached insulated from each other;
A cover that covers the upper surface of the case and that has a card accommodating portion for accommodating a memory card inserted from the rear toward the front;
When a memory card having an inclined surface for preventing erroneous insertion formed between the front surface and one side surface in the insertion direction is accommodated in the card accommodating portion, each of the contacts is exposed to a plurality of conductive portions exposed in front of the memory card. Is a memory card connector that contacts
The cover is integrally formed with a leaf spring piece that is cantilevered in the direction intersecting the insertion direction of the memory card from the base end on the center side of the cover,
At least the free end side of the leaf spring piece is inclined downward with respect to the cover as an erroneous insertion prevention plate portion,
For memory cards, characterized in that the back side of the erroneous insertion prevention plate faces the card compartment perpendicular to the memory card insertion direction and crosses the movement path of the inclined surface of the memory card inserted into the card compartment. connector. The cover is formed of a conductive metal plate,
2. The memory card connector according to claim 1, wherein the cover is cut out in a substantially U shape, and a leaf spring piece is cut and raised from a part of the cover. 3. The memory card connector according to claim 1, wherein a leading end of the erroneous insertion preventing plate portion protrudes rearward from a rear side surface on the base end side. 3. The memory card connector according to claim 1, wherein the upper surface of the leaf spring piece is formed wider from the free end toward the base end. 4. The memory card connector according to claim 1, wherein a guide surface that is inclined downward is formed between a rear side surface and a lower surface of the erroneous insertion preventing plate portion.

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