JP2009123395A - Memory card socket - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a memory card socket capable of preventing a contact from being damaged, even when a differently standardized memory card is inserted by mistake, with a simple structure, with its cost suppressed. <P>SOLUTION: This memory card socket is equipped with a socket body 3, a contact block 4 having a plurality of contacts 10, and a slider 5 moving with a memory card in keeping with inserting and pulling out operation of a memory card MC. In this slider 5, one or more grooves 28 are provided to avoid contact with the contacts 10 among the contacts 10 disposed in the moving range of the slider 5, and an engagement part 5e for positioning the corner parts of the differently standardized memory card MS the thickness dimension and the width dimension of which disagree with the dimensions of the memory card MC by getting the corner parts on the inserting direction side of the memory card engaged with it is provided. In the socket body 3, one or more pushing-up portions 11a protruding in the thickness direction is provided around the end part on the card insertion port 3a side of the contact 10 corresponding to the engagement part 5e. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  In the present invention, a memory card such as an SD memory card (registered trademark) or a multimedia card (MMC) or an SDIO card having the same size and terminal arrangement as the SD memory card (registered trademark) is detachably connected. The present invention relates to a socket for a memory card.

  Conventionally, it is a box shape having a card insertion slot at one end, and a socket body into which a memory card is slid and inserted through the card insertion slot, and a resin base disposed at the other end of the socket body by press fitting A plurality of contacts that are held together and contact each of a plurality of I / O contact surfaces formed on the memory card, and a memory card that is disposed in the socket body so as to be movable in the insertion / removal direction of the memory card. A slider that moves with the memory card along with the insertion / extraction operation, a coil spring that constantly urges the slider in the direction of ejecting the memory card, and a heart cam groove that is held by the socket body and has the other end provided in the slider. The cam pin to be engaged is engaged with the locking recess that is attached to the slider and is provided on the side of the memory card when the memory card is inserted. Memory card socket and a lock member that is provided.

  In this type of memory card socket, a memory card having a different standard from that of the memory card inserted into or removed from the socket, that is, a memory card having a different standard having a different thickness or width, is inserted by mistake. There is a problem that a thick rib provided to insulate between terminals on the / O contact surface comes into contact with the contact and damages the contact. A means for preventing such an erroneous insertion of the memory card is disclosed in, for example, Patent Document 1.

  As shown in FIG. 12, the memory card socket (card socket) described in Patent Document 1 includes a housing body 200 and a cover (not shown), and is inserted from the card insertion slot 200a and the card insertion slot 200a. For example, a housing having a card storage space for storing a card (not shown) such as an IC card, and the card is received to the back of the card storage space when the thickness and width of the card are predetermined. And a card misinsertion preventing member 201 that prevents the card from being received to the back of the card accommodation space when the thickness dimension or the width dimension of the card does not reach a predetermined dimension. The card mis-insertion preventing member 201 is elastically deformable in a thickness direction connected to the pair of fixing portions (not shown) fixed to the housing body 200 and extending along the card insertion direction. A pair of spring portions 201a, a width direction stopper portion 201b for connecting each spring portion 201a along a direction orthogonal to the extending direction of the spring portion 201a, and a thickness direction provided at each end of the width direction stopper portion 201b And a pair of thickness direction stoppers 201c protruding in the direction (one in the figure). In addition, a storage space in which the spring portion 201a, the width direction stopper portion 201b, and the thickness direction stopper portion 201c are stored is formed at the bottom of the housing body 200.

Hereinafter, the operation of the erroneous card insertion preventing member 201 will be described. When a card having a predetermined thickness dimension and width dimension is inserted, the spring part 201a is elastically deformed by being pushed by the card, and the spring part 201a, the width direction stopper part 201b, and the thickness direction stopper part 201c are all housings. A card can be inserted to be stored in the bottom of the main body 200. On the other hand, when a card whose thickness dimension does not reach the predetermined dimension is inserted, the spring portion 201a is elastically deformed by being pushed by the card, but is elastic enough to accommodate the thickness direction stopper portion 201c in the bottom of the housing body 200. In order not to be deformed, insertion of the card is prevented by the thickness direction stopper portion 201c. Further, when a card whose width dimension does not reach the predetermined dimension is inserted, since the card does not contact the spring part 201a, the spring part 201a is not elastically deformed. Therefore, the width direction stopper part 201b is stored in the bottom of the housing body 200. Therefore, the insertion of the card is prevented by the width direction stopper portion 201b. Thus, by providing the card erroneous insertion preventing member 201, it is possible to prevent erroneous insertion of a card having a different standard whose thickness or width does not reach a predetermined dimension and prevent the contact from being damaged.
JP 2004-62500 A

  However, in the above conventional example, in order to prevent erroneous insertion of cards with different standards, it is necessary to provide the wrong card insertion preventing member 201 on the housing body 200 as a member different from the members constituting the existing memory card socket. There is a problem in that a costly mechanism is required as well as a costly mechanism.

  The present invention has been made in view of the above points, and is a memory card that has a simple configuration and can prevent contact damage when a memory card with a different standard is erroneously inserted while suppressing cost. The purpose is to provide a socket for the use.

  In order to achieve the above object, the invention according to claim 1 is formed in a box shape having a card insertion slot opened at one end, and a socket body into which a memory card is slid and inserted through the card insertion slot, and a memory A contact block having a plurality of contacts that respectively contact a plurality of I / O contact surfaces provided on one surface of the card, the contact block being disposed on the socket body with the plurality of contacts facing the card insertion slot side, and the socket body And a slider that moves with the memory card when the memory card is inserted / removed from the card insertion slot. The slider has a slider movement range of the contacts. One or a plurality of grooves for avoiding contact with the contacts arranged on the surface are provided, and the thickness dimension and the width dimension are An engagement portion is provided for engaging and positioning a corner portion on the insertion direction side of a memory card of a different standard that does not match the size of the memory card, and the socket body has a contact card corresponding to at least the engagement portion. One or a plurality of push-up portions protruding in the thickness direction are provided around the end portion on the insertion opening side.

  According to the present invention, the corner portion on the insertion direction side of the memory card having a different standard of thickness and width that does not match can be positioned at a desired position by the engaging portion provided on the slider. Since the push-up part that protrudes in the thickness direction is provided around the end of the contact corresponding to the position where the card is inserted, even if the memory card is forcibly pushed, the corners of the memory card are pushed up by the push-up part. It is possible to prevent the contact portion from being damaged due to contact of the corner portion of the contact portion. Furthermore, the engaging part can be formed by cutting out the slider, and the push-up part can also be formed by cutting and raising from the socket body, so if a memory card with a different standard is mistakenly inserted with a simple structure and low cost Can be prevented from being damaged.

  Embodiments of a memory card socket according to the present invention will be described below with reference to the drawings. In the following description, unless otherwise specified, the arrow ab in FIG. 1 is defined as the up and down direction, the arrow cd as the left and right direction, and the arrow ef as the front and rear direction. In this embodiment, as shown in FIGS. 1 and 2, a base shell 1 formed by punching and bending a stainless steel plate having a very thin thickness, and the thickness is extremely thin like the base shell 1. Formed by punching and bending a stainless steel metal plate, a flat box-shaped socket body 3 having a card insertion slot 3a opened on the front surface by being attached to the base shell 1 is composed of the base shell 1 A cover shell 2 to be mounted, a contact block 4 mounted in the rear portion of the socket body 3, and an L-shaped resin molded product disposed movably in the front-rear direction in the socket body 3 on the front side of the contact block 4. The slider 5 is a main component.

  As shown in FIGS. 5A and 5B, the base shell 1 is provided with side pieces 6a and 6b formed by bending upward on the left and right sides of a rectangular metal plate. It is open. A protruding piece 9 protruding upward is formed at the rear end of the base shell 1 in a left-right direction at a predetermined interval. The protruding piece 9 protruding upward is formed at the left end of the base shell 1 at a predetermined interval in the front-rear direction. The base shell is formed by press-fitting these projecting pieces 9 into the press-fitting groove 8 (see FIG. 7B) opened on the lower surface of the resin base 7 of the contact block 4 from below. The contact block 4 is press-fitted and fixed to the upper surface of 1.

  Further, a plurality of holes 11 are formed in front of the rear end of the base shell 1 so as to allow the contacts 10 described later held by the contact block 4 to escape.

  Further, a support piece 12 that is substantially L-shaped in a side view is projected from the right end of the front side edge of the base shell 1 so as to protrude upward from a position outside the passing position of the memory card MC and further its front end protrudes rearward. A shaft portion 16b on one end side of a cam pin 16, which will be described later, is engaged in an engagement hole 12a provided on the upper surface of the support piece 12, and the cam pin 16 is pivotally supported with respect to the support piece 12. ing. Further, on the right edge of the base shell 1, protrusions 13, 13 that fit into a groove 27 of the slider 5 to be described later and guide the slider 5 are formed by cutting and raising in the front-rear direction. Further, on the left side of the front edge of the base shell 1, an engagement piece 1a that is engaged with a front end portion of a side portion 7b of a base body 7 described later is formed by bending.

  As shown in FIG. 7, the contact block 4 is arranged along the rear side of the base shell 1 and the cover shell 2, and closes the rear surface of the socket body 3, and the left end of the side portion 7a. Projecting forward and having a base body 7 made of a substantially L-shaped resin molded product integrally formed with a side portion 7b arranged along the side piece 6b of the base shell 1, at the right end of the front surface of the side portion 7a. A round bar-shaped spring receiving projection 7c is provided to hold one end of the coil spring 14 that urges the slider 5 forward, and a rectangular fitting projection 7e is provided at the right end of the upper surface of the side portion 7a. Has been. Further, the side portion 7b is integrally provided with a step portion 7d that extends along a sliding direction of the memory card MC from a connection portion with the side portion 7a and faces the back surface of the memory card MC. In addition, at the upper corner portion of the front surface of the side portion 7a, there are provided three engagement recesses 17 that are engaged with a protruding piece 20 of the cover shell 2 described later with a space in the left-right direction. In addition, an engagement recess 18 that engages with a bent piece 19 of the cover shell 2 described later is formed on the upper corner of the rear surface of the side portion 7a over substantially the entire left and right direction.

  Further, on the side portion 7a of the base body 7, there are nine I / O contact surfaces (not shown) formed in parallel on the back surface of the rear portion of the memory card MC in parallel with each other (nine in the SD memory card (registered trademark)). The contacts 10 are press-fitted and fixed, and the contact side of each contact 10 is projected forward of the side portion 7a. Further, in the press-fitting grooves 33, 34, 35 provided on the upper surface of the side portion 7b, a common terminal plate 30 having fixed contacts 41a, 42a and a fixed contact 41a provided on the common terminal plate 30 together with a memory card MC mounting detection A movable contact plate having a movable contact plate 31A having a movable contact constituting a contact, and a movable contact plate constituting a contact for position detection of the write protect switch 100 of the memory card MC together with a fixed contact 42a provided on the common terminal plate 30. 31B is press-fitted and fixed from above. Note that the soldering terminals 10a of the contacts 10... Protrude upward from the rear surface of the side portion 7a, and the soldering terminals 30a of the common terminal plate 30 and the soldering terminals (surface mounting terminals) of the movable contact plates 31A and 31B described later. ) 31d and 31d protrude upward from the outer surface of the side portion 7b.

  As shown in FIG. 1, the common terminal board 30 is formed by punching and bending an elastic strip-shaped sheet metal, and upward from the upper edge on one end side in the longitudinal direction. A soldering piece 30a having a substantially L-shape in side view is projected. In addition, the dowel-shaped fixed contacts 41a and 42a are provided on one end side in the longitudinal direction at the middle portion in the longitudinal direction and the upper edge on the other end side, and the middle portion in the longitudinal direction is bent outward. The other end side in the longitudinal direction of the fixed contact plates 41 and 42 is connected. When the common terminal plate 30 is press-fitted and fixed in the press-fitting groove 33 of the base body 7, the end portions of the fixed contact plates 41 and 42 on the side where the fixed contacts 41a and 42a are formed are recessed portions 36 and 36 provided on the side portion 7b. Placed inside.

  Next, the movable contact plates 31A and 31B will be described. Since the movable contact plates 31A and 31B are formed in the same shape, the movable contact plate 31A will be described with reference to FIG. 1, and the description of the movable contact plate 31B will be omitted. The movable contact plate 31A is formed by punching and bending a metal plate having elasticity, a rectangular plate-like press-fitting piece 31a that is press-fitted and fixed in a press-fitting groove 34 provided in the base body 7, and a press-fitting piece 31a. A strip-shaped contact spring portion 31b that protrudes laterally from the upper portion on one end side in the width direction and has a distal end curved in a substantially U shape, and is extended from one side edge of the press-fitting piece 31a in the thickness direction of the socket body 3 And a soldering terminal 31d having a substantially L shape in side view. The contact spring 31b is formed with a V notch (not shown) that comes into contact with the fixed contact 41a at a portion closer to the front of the curved portion provided on the distal end side, and the fixed contact 41a from the portion where the V notch is formed. , 42a are configured to be movable contacts. When the movable contact plates 31A and 31B are press-fitted into the press-fit grooves 34 and 35 opened on the upper surface of the base body 7, the curved portion provided on the distal end side of the contact spring 31b of each movable contact plate 31A and 31B becomes the side portion 7b. It protrudes inward of the socket body 3 through the recess 36 (see FIG. 9).

  On the other hand, the cover shell 2 is formed by bending a rear edge of a rectangular plate-shaped metal plate in a direction substantially perpendicular to the main surface, that is, in a downward direction, as shown in FIG. Three projecting pieces 20 projecting in a direction substantially perpendicular to the main surface, that is, in a lower side direction, are bent slightly toward the front end of the piece 19. Further, a fitting hole 2b into which the fitting protrusion 7e of the base body 7 is fitted is provided on the right side of the rear portion of the cover shell 2, and the front portion of the right edge of the cover shell 2 protrudes downward. An L-shaped weld piece 2a is formed by bending.

  Further, the front surface of the cover shell 2 is elastically brought into contact with the surface of the memory card MC to hold the memory card MC, and for the SDIO type card, it is elastically contacted with a ground terminal provided on the upper surface of the SDIO card. The spring pieces 21 and 21 are formed by punching and bending, and a shaft portion 16b on one end side of the cam pin 16 is provided at a portion facing the support piece 12 of the base shell 1 on the right end portion on the front side. A pressing piece 22 is formed by cutting and raising to prevent the shaft portion 16b from falling off. Further, the shaft portion 16a at the other end portion of the cam pin 16 is pressed, and the tip of the shaft portion 16a is provided with an uneven surface of a guide groove 15b described later. A substantially T-shaped elastic contact spring piece 23 to be brought into contact with 15c is formed by punching and bending. Also, a lock body 24 that engages with the locking recess 101 of the memory card MC when the memory card MC is mounted is punched and bent near the rear end of the right end portion of the cover shell 2. It is formed by. The lock body 24 is in the form of a long and narrow strip, and is substantially parallel to the side piece 6a of the base shell 1 and is connected to the cover shell 2 with the rear end portion bent and the front end portion bent inward. The engagement piece 24b is formed to extend forward from the front end portion of the piece 24a and has a distal end curved in a substantially arc shape toward the inner side (see FIG. 6B).

  The slider 5 is a resin molded product, and as shown in FIG. 8, a side portion 5a that contacts the right edge of the memory card MC and a front edge of the memory card MC that protrudes laterally from the rear end of the side portion 5a. Is formed in a substantially L-shape with the side portion 5b that comes into contact with the side portion 5b, and a slope formed by dropping the corner portion on the right side of the front portion of the memory card MC at the entering corner surrounded by the side portion 5a and the side portion 5b. A contact portion 5c having an inclined surface in contact with the cut portion 102 on the front surface is formed. The contact portion 5c is formed with a notch engaging portion 5e described later. Further, on the inner side surface (the left side surface in FIG. 8A) of the side portion 5a, a step portion 5d extending along the sliding direction of the memory card MC from the contact portion 5c and facing the back surface of the memory card MC is provided. It is prepared as one.

  On the other hand, on the lower surface of the side portion 5a, there is formed a narrow groove 26 having a substantially arc-shaped cross section having an outer side, a lower side, and a rear side opened from the rear end portion to the central portion. The other end of the coil spring 14 is housed, and the inner surface of the front end of the narrow groove 26 is a surface that receives the elastic force of the coil spring 14. Further, on the lower surface of the side portion 5a, both the front and rear sides and the lower side are opened, and a concave groove 27 into which the protruding portions 13 and 13 of the base shell 1 are engaged is formed along the front and rear direction. That is, when the assembly is completed, the slider 5 is restricted in moving direction by the main plane of the base shell 1, the side piece 6 a, the ridges 13 and 13, and the main plane of the cover shell 2, Further movement in the forward direction is restricted by contacting the front end portion of 5a. The slider 5 is urged forward by a coil spring 14, and the memory card MC is inserted into the socket body 3 so that the I / O contact surface of the memory card MC contacts the contacts 10 and the memory. The card MC slides between a position where it can be removed from the socket body 3. In addition, in order to prevent the contacts 10 and the slider 5 from colliding with each other when the slider 5 is slid, the side portion 7b has a plurality of groove portions 28 with front and rear surfaces and lower surfaces that avoid the contacts 10 (opened). Two are shown in the figure.

  In addition, a heart cam groove portion 15 into which the shaft portion 16a of the cam pin 16 is movably engaged is formed on the upper surface of the front side portion of the side portion 5a, and a lock provided on the cover shell 2 is located behind the heart cam groove portion 15. A concave groove 25 into which the body 24 is inserted is formed. As shown in FIGS. 8A and 8D, the heart cam groove portion 15 includes a heart cam 15a and a guide groove 15b formed in the peripheral portion of the heart cam 15a, and the shaft portion 16a of the cam pin 16 is connected to the guide groove 15b. As the slider 5 moves back and forth, the relative movement of the shaft portion 16a of the cam pin 16 in the guide groove 15b is guided by the guide groove 15b and the uneven surface 15c formed on the bottom surface of the guide groove 15b. It has come to be. The front portion of the heart cam 15a is formed with a concave portion 15d opened to the front side, and the shaft portion 16a of the cam pin 16 is released when the pushing force of the memory card MC after the slider 5 is moved to the rearmost position. By fitting into the recess 15d, the movement of the slider 5 in the forward direction is restricted, and the slider 5 is held at a predetermined position. Further, a protruding portion 29 protruding inward of the socket body 3 is formed on the front side portion on the right end surface of the groove 25 provided on the upper surface of the side portion 5a, and when the slider 5 moves to the predetermined position. The overhanging portion 29 presses the lever piece 24a of the lock body 24 to engage the tip portion (engagement piece 24b) of the lock body 24 into the locking recess 101 of the memory card MC, and to the memory card MC. When the slider 5 is moved to the take-out position, the protruding portion 29 is separated from the lock body 24, so that the lock body 24 returns to the initial position, and the tip of the engagement piece 24b is retracted from the lock recess 101. It has become.

  Hereinafter, the assembly method of this embodiment will be described. First, each of the contacts 10 is press-fitted into a press-fitting hole (not shown) opened on the rear surface of the base 7 and the common terminal plate 30 is press-fitted into a press-fitting groove 33 provided in the side portion 7b of the base 7. The movable contact plates 31A and 31B are press-fitted and fixed in press-fit grooves 34 and 35 provided in the portion 7b, respectively. At this time, the contact spring portion 31b of the fixed contact plate 41 and the movable contact plate 31A is opposed to the rear recessed portion 36 provided on the side portion 7b with the contact spring portion 31b inside, and the side portion. The contact spring portion 31b of the fixed contact plate 42 and the movable contact plate 31B is disposed opposite to the front recessed portion 36 provided in 7b with the contact spring portion 31b inside.

  Then, after assembling the contact block 4 by holding the contacts 10..., The common terminal plate 30 and the movable contact plates 31 </ b> A and 31 </ b> B on the base body 7, the base body 7 of the contact block 4 is placed on the upper surface of the base shell 1. Then, the base 7 is fixed to the base shell 1 by press-fitting the protruding piece 9 of the base shell 1 into the press-fit groove 8 opened on the lower surface of the base 7. At this time, the front end portion of the side portion 7b of the base body 7 is engaged with the engagement piece 1a of the base shell 1 to regulate the positional deviation of the front end portion of the side portion 7b. Then, with the one end side of the coil spring 14 inserted and held in the spring receiving projection 7c of the base body 7, the other end side of the coil spring 14 is inserted into the narrow groove 26, and the protrusion 13 of the base shell 1 is recessed. After the slider 5 is placed on the base shell 1 so as to fit in the groove 27, the shaft portion 16 b on one end side of the cam pin 16 is engaged with the engagement hole 12 a provided in the support piece 12 of the base shell 1. At the same time, the shaft portion 16 a on the other end side of the cam pin 16 is engaged with the heart cam groove portion 15 of the slider 5. Thereafter, the cover shell 2 is bridged between the tip portions of both side pieces 6a and 6b of the base shell 1 with the fitting protrusion 7e of the base body 7 fitted in the fitting hole 2b of the cover shell 2. The base shell 1 and the cover shell 2 are joined by laser welding of the joining portions (the butted portions of the left and right side edges of the cover shell 2 and the tip portions of both side pieces 6a and 6b of the base shell 1), A box-shaped socket body 3 having a card insertion slot 3a opened at the front is formed, and the assembly of the memory card socket is completed (see FIG. 2). A narrow welding piece 12b projecting sideways is projected on the upper surface of the support piece 12 formed by bending from the front side edge of the base shell 1, and the cover shell 2 is attached to the weld piece 12b. Since the support piece 12 is connected to the cover shell 2 by abutting the downward stepped portion of the weld piece 2a and joining by laser welding, the strength of the support piece 12 can be increased. In this assembled state, the slider 5 is urged by the coil spring 14 to be pushed forward, and the front end of the side portion 5a abuts on the support piece 12 of the base shell 1, thereby further moving the slider 5 forward. Movement to is regulated. In this state, one end of the cam pin 16 has moved to the position A (see FIG. 8A) at the rear end of the guide groove 15b.

  Here, the space between the support piece 12 of the base shell 1 and the side portion 7b of the base 7 corresponds to the card insertion slot 3a, and is above the step portions 5d and 7d of the side portion 5a and side portion 7b of the slider 5. The dimension between the inner edges of the memory card MC is set to be slightly larger than the maximum width dimension on both sides of the memory card MC, and the dimension between the upper surface of the base shell 1 and the upward surfaces of the step portions 5d and 7d is set on the upper surface of the base shell 1. The size is slightly smaller than the height of the downward surface of the downward step 103 (see FIGS. 3 and 4) formed over the entire length in the front-rear direction on both side edges of the back surface of the memory card MC with the back side placed. The size between the inner edges of the side portions 5a and 7b below the step portions 5d and 7d is set to be slightly larger than the width of the both sides below the downward step portion 103 of the memory card MC.

  Thus, when the back surface (surface on which the I / O contact surface is formed) of the memory card MC is placed on the upper surface side of the base shell 1, the downward step portion 103 of the memory card MC is the step portion 5d of the side portions 5a and 7b. 7d so that the memory card MC can be inserted from the card insertion slot 3a. On the contrary, the surface of the memory card MC (the surface opposite to the surface on which the I / O contact surface is formed). Is directed to the upper surface side of the base shell 1, the both side portions of the memory card MC that are on the base shell 1 side cannot pass between the inner edges of the two stepped portions 5d and 7d, and the memory card MC faces in the front-back direction. Incorrect insertion due to mistakes is prevented.

  Further, in the base shell 1, push-up portions 11 a are formed by cutting and raising on both side edges on the front side of the right end hole 11 provided corresponding to the right end contact 10 (see FIG. 5B). That is, when the memory card MC is inserted into the card insertion slot 3a in the normal direction, it is inserted through an opening of a groove (not shown) that leads to the I / O contact surface provided on the back surface of the memory card MC. Each of the contacts 10 can move to the contact position. However, when the memory card MC is to be inserted with the front-rear direction reversed, the push-up portion 11a collides with the front portion in the insertion direction. By restricting the above movement, the tip of each contact 10 is prevented from being damaged by hitting the front surface on the insertion side of the memory card MC.

  Further, as shown in FIG. 5B, from the front right side edge of the left end hole 11, the front right side edge of the second hole 11 from the left end, the front left side edge of the fourth hole 11 from the left end, from the left end. A push-up portion 11 a is also formed by cutting and raising at the right side edge on the front side of the fifth hole 11. This is because when a memory card MS (see FIGS. 10 (c) and 10 (d)) with different standards whose thickness and width are smaller than the size of the memory card MC is erroneously inserted, the insertion direction of the memory card MS A thick rib (not shown) for insulating a portion corresponding to each contact 10 on the I / O contact surface of the memory card MS, specifically, a tip of each contact 10. This is to prevent the contacts 10 from being damaged by colliding with each other. That is, when the memory card MS is mistakenly inserted, the rib of the memory card MS collides with the push-up portion 11a, and when the memory card MS is further pushed, the push-up portion 11a causes the rib of the memory card MS to By letting it escape upward, it is possible to avoid the contacts 10... And the ribs of the memory card MS from colliding with each other, and it is possible to prevent the contacts 10.

  The push-up portion 11a may be provided in any hole 11 as long as the hole 11 other than the hole 11 at the right end can provide the above-described effect, but it does not depend on the insertion angle of the memory card MS. It is desirable that the ribs of the memory card MS be arranged so as to make contact with any one of the push-up portions 11a.

  Next, the operation of inserting / removing the memory card MC into / from the memory card socket according to the present embodiment will be described. When the memory card MC is not attached, the slider 5 is moved forward to a position where the front end of the side portion 5a abuts with the support piece 12 of the base shell 1 due to the elastic force of the coil spring 14. . In this state, the engagement piece 24b of the lock body 24 is retracted into the concave groove 25, and the distal end portion of the engagement piece 24b does not protrude inward from the inner side surface of the side portion 5a.

  From this state, when the memory card MC is inserted into the card insertion slot 3a of the socket body 3 with the front-rear direction and the front-back direction in the normal direction, the memory card MC is connected to the side 5a of the slider 5 and the side 7b of the base body 7. The downward stepped portions 103 and 103 on both sides of the lower surface of the memory card MC are placed on the upper side of the stepped portions 5d and 7d provided on the both side portions 5a and 7b. When the memory card MC is further inserted into the socket body 3, the inclined cut portion 102 provided on the right side of the front end portion of the memory card MC abuts against the contact portion 5c of the slider 5 and pushes the slider 5 backward. become. Thereafter, when the memory card MC is pushed further inward against the resilient force of the coil spring 14 applied to the slider 5, the slider 5 moves backward with the movement of the memory card MC. By the retreat of the slider 5, the shaft portion 16a of the cam pin 16 is moved by the guide groove 15b to the lower side in FIG. 8A while being guided by the uneven surface 15c at the bottom of the guide groove 15b of the heart cam groove portion 15. 8 (a) (in fact, when the slider 5 moves rearward, the shaft 16a of the cam pin 16 moves forward in the guide groove 15b (in FIG. 8A)). Will move down)). When the memory card MC is pushed to a position close to the position where the rear surface of the side portion 5b of the slider 5 contacts the front surface of the base 7 of the contact block 4, the shaft portion 16a of the cam pin 16 reaches the position C where the shaft portion 16a contacts the front end portion of the guide groove 15b. In other words, it is impossible to push further. At this time, as the slider 5 moves rearward, the overhanging portion 29 provided on the inner end surface of the groove 25 abuts on the lever piece 24a of the lock body 24, and the lever piece 24a is bent inward of the socket body 3. Therefore, the engaging piece 24b of the lock body 24 protrudes inward from the inner surface of the side portion 5a and engages with the locking recess 101 of the memory card MC, thereby locking the memory card MC and the memory card. MC is prevented from falling off.

  When the pushing force applied to the memory card MC at this position is released, the slider 5 returns to the front together with the memory card MC due to the elastic force of the coil spring 14, but the shaft portion 16a of the cam pin 16 is guided by the guide groove. While being guided by 15b, it moves to a position D that fits into the recess 15d of the heart cam 15a. Therefore, when the shaft portion 16a of the cam pin 16 contacts the recess 15d of the heart cam 15a, further forward movement of the slider 5 is restricted, and the memory card MC locked by the lock body 24 is also located in the socket body 3 at that position. Will stay.

  When the memory card MC is moved to a predetermined position by being pushed in, the tips of the contacts 10 projecting forward from the side portion 7a of the base body 7 are sequentially applied to the corresponding I / O contact surfaces formed on the back surface of the memory card MC. Will be in contact. Further, the movable contact plate 31A protruding inward from the inner surface of the side portion 7b of the base body 7 is pushed by the tip end portion of the memory card MC and comes into contact with the common terminal plate 30. Since the connection with the board 30 (that is, the contact for detecting attachment) is conducted, the switch signal is used to detect that the memory card MC has been inserted into the proper position by an external detection circuit (not shown). Can do.

  Further, a concave portion 105 in which the knob 104 of the write protect switch 100 is exposed is provided on one side surface of the memory card MC corresponding to the movable contact plate 31B, and the movable contact plate 31B is changed depending on the movement position of the knob 104 in the concave portion 105. The leading end of the switch rides on the knob 104 or falls into the recess 105, and accordingly, between the movable contact plate 31B and the common terminal plate 30 (that is, the position detection contact of the write protect switch 100) is turned on. Therefore, it is possible to detect whether or not the memory card MC is in the write protect state by using an external detection circuit (not shown) using this switch signal. In the standard of the memory card MC, the dimensional tolerance in the width direction is smaller than the dimensional tolerance in the thickness direction, and the contact spring portions 31b of the movable contact plates 31A and 31B are arranged on the card surface from the width direction of the memory card MC. Alternatively, since it is in contact with the write protect switch, the contact stability can be improved as compared with the case where it is in contact with the card surface or the write protect switch from the thickness direction where the dimensional variation is large.

  When the memory card MC mounted as described above is taken out from the socket, first, the end of the memory card MC exposed to the outside is pushed in the insertion direction from the card insertion slot 3a of the socket body 3, and the slider 5 together with the memory card MC is pushed. Is moved in the insertion direction. By this movement, the shaft portion 16a of the cam pin 16 is detached from the concave portion 15d of the heart cam 15a, and is guided by the guide groove 15b to exit rightward from the concave portion 15d, and moves to a position E in the guide groove 15b.

  Thereafter, when the pushing force of the memory card MC is released, the slider 5 moves forward by the elastic force of the coil spring 14. When the slider 5 moves forward, the shaft portion 16a of the cam pin 16 is guided by the guide groove 15b along with the movement of the slider 5 and passes through the position F in the guide groove 15b on the right side of the heart cam 15a. Move to position A at the rear end. Further, as the slider 5 moves in the forward direction, the overhanging portion 29 of the slider 5 is separated from the lever piece 24a of the lock body 24, so that the force for bending the lever piece 24a is lost and the lever piece 24a is moved to the initial position. Returning, the tip of the engagement piece 24b is retracted into the concave groove 25 of the side portion 5a, so that the engagement state between the engagement piece 24b and the locking recess 101 is released, and the lock of the memory card MC is released. The Further, since the end portion of the memory card MC is largely exposed to the outside from the card insertion port 3a of the socket body 3, the memory card MC can be taken out from the socket body 3.

  Hereinafter, the engaging portion 5e of the slider 5 and the push-up portion 11a of the base shell 1 which are the gist of the present embodiment will be described. First, as shown in FIG. 10B, a case where a memory card MS having a different standard is inserted into the socket body 3 provided with the conventional slider 5 without the engaging portion 5e will be described. In the conventional slider 5, when a memory card MS having a different standard is inserted, the corner portion on the insertion direction side of the memory card MS is guided by the contact portion 5c of the slider 5 and fits into the groove 28 (FIG. 10). (See (d)). Therefore, when the memory card MS is pushed in that state, the upper wall of the groove portion 28 prevents the push-up portion 11a from escaping the memory card MS upward, and the corner portion of the memory card MS, that is, the I / O of the memory card is The thick ribs provided to insulate between the terminals on the O contact surface cannot escape above the contact 10 but abut against the tip of the contact 10, thus damaging the contact 10.

  Therefore, in the present embodiment, as shown in FIG. 10A, the contact portion 5c of the slider 5 is formed by cutting out the engagement portion 5e with which the corner portion of the memory card MS is engaged. The engaging portion 5e positions the memory card MS so that when the corner portion of the memory card MS is engaged, the push-up portion 11a provided in the right end hole 11 and the rib of the memory card MS abut each other. (See FIG. 10C).

  Thus, in this embodiment, when a memory card MS having a different thickness and width dimension than that of the memory card MC is inserted, the corner portion of the memory card MS is guided to the contact portion 5c. Therefore, the memory card MS can be prevented from fitting into the groove at the corner. Further, since the engaging portion 5e positions the memory card MS so that the push-up portion 11a provided in the hole 11 at the right end and the rib of the memory card MS abut, the push-up portion 11a is pushed even if the memory card MS is pushed. As a result, the rib of the memory card MS is released upward to avoid contact with the contact 10, and damage to the contact 10 can be prevented. Here, the engaging portion 5e can be formed by cutting out the slider 5, and the push-up portion 11a can be formed by cutting and raising from the base shell 1, so that it is not necessary to provide a separate member for preventing erroneous insertion as in the conventional example. Therefore, it is possible to prevent the contact 10 from being damaged when a memory card MS having a different standard is erroneously inserted with a simple configuration and cost reduction.

  In the present embodiment, as shown in FIG. 10 (c), thick reinforcing portions 5f are formed on the inner left and right side edges of the groove portion 28 corresponding to the engaging portion 5e. Thus, the slider 5 is reinforced by the reinforcing portion 5f, and when the memory card MS is inserted, the reinforcing portion 5f and the corner portion of the memory card MS abut against each other. Can be more reliably prevented.

  Further, in the present embodiment, the push-up portion 11a corresponding to the right end hole 11 protrudes upward from the left and right side edges on the front side of the hole 11, but as shown in FIG. You may make it protrude so that it may incline upwards. Also in this case, when the memory card MS having a different standard is inserted by mistake, the corner portion of the memory card MS is pushed up by the push-up portion 11a, so that the contact 10 can be prevented from being damaged.

  In this embodiment, the SD memory card (registered trademark) is described as an example of the memory card. However, the size of the part inserted into the socket is the same as that of the SD memory card (registered trademark). The SDIO card is formed and has a terminal arrangement similar to that of an SD memory card (registered trademark), and can be used with an SDIO card having a functional unit such as an I / O interface, a PHS module, or a GPS module. In other words, the memory card socket of this embodiment is compatible with both SD memory cards (registered trademark) and SDIO cards. Further, in this embodiment, a Memory Stick Duo (registered trademark) is described as an example of a memory card with different standards, but the present invention is also applied to other memory cards with different standards whose thickness dimensions and width dimensions do not match. Needless to say, an effect can be achieved. Of course, it goes without saying that the technical idea of the present invention may be applied to a memory card socket having a standard different from that of the SD memory card (registered trademark).

It is a disassembled perspective view of the socket for memory cards of this embodiment. It is an external appearance perspective view at the time of card extraction same as the above. It is a figure which shows the time of card | curd mounting same as the above, (a) is a front view, (b) is a right view, (c) is a left view, (d) is a top view, (e) is a bottom view. It is a rear view at the time of card mounting same as the above. It is a figure which shows a base shell same as the above, (a) is a top view, (b) is a perspective view. It is a figure which shows a cover shell same as the above, (a) is the perspective view seen from the front side, (b) is the perspective view seen from the back side. It is a figure which shows a contact block same as the above, (a) is the perspective view seen from the front side, (b) is the perspective view seen from the back side, (c) is a rear view. It is a figure which shows a slider same as the above, (a) is a front view, (b) is a side view, (c) is a rear view, (d) is a perspective view. It is a top view of the state which removed the cover shell same as the above. BRIEF DESCRIPTION OF THE DRAWINGS It is principal part explanatory drawing of a slider same as the above, (a) is a principal part enlarged view of the slider of this embodiment, (b) is a principal part enlarged view of the conventional slider, (c) is a memory card in the slider of this embodiment. FIG. 4D is a rear view of a state where the memory card is brought into contact with a conventional slider. It is a perspective view which shows the other structure of the raising part same as the above. It is a perspective view which shows the conventional socket for memory cards.

Explanation of symbols

3 Socket body 3a Card insertion slot 4 Contact block 5 Slider 5e Engagement part 10 Contact 11a Push-up part 28 Groove part MC Memory card MS Memory card with different standard

Claims (1)

  Formed in a box shape with a card insertion opening at one end, a socket body into which a memory card is slid and inserted through the card insertion opening, and a plurality of I / O contact surfaces provided on one surface of the memory card A plurality of contacts that contact each other, a contact block that is arranged on the socket body with the plurality of contacts facing the card insertion slot side, and is arranged movably in the insertion / extraction direction of the memory card inside the socket body, A slider that moves together with the memory card when the memory card is inserted / removed from the card insertion slot, and the slider includes one or a plurality of contacts for avoiding contact with contacts arranged in the slider movement range. The groove portion is provided, and the thickness dimension and the width dimension are different from the dimensions of the memory card and have different standards. An engagement portion is provided for engaging and positioning the corner portion on the insertion direction side of the memory card, and the socket body has a thickness direction around the end portion on the card insertion port side of the contact corresponding to the engagement portion. A memory card socket, wherein one or a plurality of push-up portions projecting from each other are provided.

Images