JP2009016313A - Memory card socket - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a memory card socket capable of surely preventing a memory card from bouncing out when taking it out. <P>SOLUTION: The memory card socket includes: a slider 5 that is arranged inside a socket body so as to move back and forth and moves back and forth together with a memory card MC following inserting/removing operation of the memory card MC; a slider lock means which locks the slider 5 at a specified position with the push-in force not applied to the memory card MC is removed after the slider 5 moves to a tail end position and which releases the lock when the slider 5 moves backward with the push-in force applied to the memory card MC after locking; and a lock body 24 which engages with a locking recess 101 of the memory card MC when the slider 5 is locked, for locking the memory card MC. An engagement protrusion 34 is provided to the slider 5 which engages with the locking recess 101 from the side of the memory card MC while the slider 5 abuts on the front part of the memory card MC. <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 (registered trademark) having the same size and terminal arrangement as the SD memory card (registered trademark) can be inserted and removed. The present invention relates to a memory card socket for connecting to a card.

Conventionally, it has a box shape with a card insertion slot at the front, and the socket body into which the memory card is slid out of the card insertion slot is inserted and integrated into the resin base disposed at the rear of the socket body by press fitting A plurality of contacts that are held and contact each of a plurality of I / O contact surfaces of the memory card, and are arranged in the socket body so as to be movable in the front-rear direction, and memory according to the insertion / extraction operation of the memory card from the card insertion slot A slider that moves in the front-rear direction together with the card, a coil spring that constantly biases the slider forward, a heart cam groove formed on the surface of the slider, one end held by the connector body, and the other end in the heart cam groove The slider moves to the specified position when the pushing force of the memory card is released after the slider is moved to the last position. Then, the other end fits into a recess opened on the front side provided in the heart cam groove, and the slider is locked in the predetermined position by restricting the forward movement of the slider, and after being locked, a pushing force to the memory card is applied to the slider. The cam pin that releases the other end from the recess of the heart cam groove when the rearward movement of the heart cam groove and the slider are locked in the predetermined position to engage the memory card locking recess to lock the memory card. A memory card socket provided with a card lock means is provided (see, for example, Patent Document 1).
JP 2003-217713 A (paragraphs [0039]-[0046], [0051]-[0053] and FIG. 1)

  In the conventional memory card socket described above, when the lock by the card lock means is released when the memory card is taken out, the card lock means is retracted to the outside of the lock recess to restrict the movement of the memory card. Therefore, when the slider is moved in the take-out direction by receiving the urging force of the coil spring, there is a problem that the memory card is pushed out by the slider.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a memory card socket that reliably prevents the memory card from popping out when the card is taken out.

  In order to achieve the above object, the invention according to claim 1 is a socket main body formed in a box shape having a card insertion slot opened on the front surface, and a memory card is slid and inserted through the card insertion slot. And a plurality of contacts that respectively contact a plurality of I / O contact surfaces provided on one side of the memory card, and a socket body that is movably disposed in the front-rear direction, and that is connected to the memory card from the card insertion slot. A slider that moves forward and backward with the memory card as a result of the insertion / extraction operation, an urging spring that constantly urges the slider forward, and a slider that releases the pushing force of the memory card after moving the slider to the rearmost position. The lock is unlocked when the slider is locked in place and the slider moves backward due to the pushing force applied to the memory card. An idler locking means and a card locking means for locking the memory card by engaging the locking recess of the memory card when the slider is locked at the predetermined position, with the front portion of the memory card being brought into contact with the slider A first fitting projection that fits from the side of the memory card is provided in a locking recess provided in the memory card on the side surface of the slider that is opposed to the side surface of the memory card in a state of being .

  The invention of claim 2 is characterized in that, in the invention of claim 1, the corners of the first fitting protrusions are formed in a curved surface shape in the insertion / extraction direction of the memory card.

  According to a third aspect of the present invention, in the first or second aspect of the present invention, the memory card is placed on the surface of the slider that is disposed opposite to the one surface in the thickness direction of the memory card with the front portion of the memory card in contact with the slider. A second fitting projection for fitting from the thickness direction of the memory card is provided in the locking recess.

  According to the first aspect of the invention, when the memory card is taken out, the first fitting protrusion provided on the slider is fitted with the locking recess of the memory card, thereby preventing the memory card from popping out. There is. In addition, the dimensional tolerance in the width direction of the memory card (the direction perpendicular to the card insertion / removal direction and the thickness direction) reduces the positional deviation of the I / O contact surface to ensure the electrical connection. Since the first fitting protrusion provided on the slider is fitted in the locking recess from the side having a small dimensional tolerance, the first fitting protrusion and the locking recess are stricter than the direction. It is possible to surely obtain the effect of preventing popping out by securely fitting the portion.

  According to the invention of claim 2, since the corner portion of the first fitting protrusion is formed in a curved surface shape, the movement when the locking recess gets over the first fitting protrusion can be smoothly performed, and the operation There is an effect that the touch can be improved.

  According to the invention of claim 3, in addition to the first fitting protrusion, the second fitting protrusion provided on the slider is engaged in the locking recess from the thickness direction. There is an effect that it can be surely prevented.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS. In the following description, the arrow ab in FIG. 2 will be described in the vertical direction, the arrow cd in the horizontal direction, and the arrow ef in the front-rear direction unless otherwise specified.

  FIG. 1 and FIG. 2 show an entire exploded perspective view and an overall perspective view of the present embodiment corresponding to a memory card MC such as an SD memory card (registered trademark). As shown in the drawing, a base shell 1 (one metal shell) formed by stamping and bending a very thin stainless steel plate, and a stainless steel having a very thin thickness similar to the base shell 1. A cover which is formed by punching and bending a plate, and which comprises a flat box-shaped socket body 3 with a base shell 1 which is attached to the base shell 1 and has a card insertion slot 3a open on the front surface. Shell 2 (the other metal shell), contact block 4 mounted in the rear part of socket body 3, and socket body on the front side of contact block 4 In which the slider 5 consisting movably disposed are L-shaped resin molded article in the longitudinal direction and the major components within.

  As shown in FIGS. 6 (a) and 6 (b), the base shell 1 has side pieces 6a and 6b formed by bending the rectangular plate-like metal plate on the left and right sides of the upper surface (corresponding to the inside of the socket body 3) in the side direction. The front and rear ends are open. At the rear end of the base shell 1, projecting pieces 9 projecting in the upper surface direction are bent into four in the left-right direction at a predetermined interval. At the left end of the base shell 1, projecting pieces 9 projecting in the upper surface direction are formed at a predetermined interval. The protrusions 9 are bent in the front-rear direction, and these protruding pieces 9 are press-fitted from below into a press-fitting groove 8 (see FIG. 8B) opened on the lower surface of the resin base 7 of the contact block 4. The contact block 4 is press-fitted and fixed to the upper surface of the base shell 1.

  Further, a plurality of holes 11 for releasing later-described contacts 10 held by the contact block 4 are formed slightly forward from the rear end of the base shell 1.

  Further, a support piece 12 having an L-shape in a side view is formed at 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 to protrude rearward. Thus, the support piece 12 and the base shell 1 are formed in a U-shape, and both end portions of a metal round bar are bent in a direction perpendicular to the axial direction in the shaft hole 12a provided on the upper surface of the support piece 12. A shaft portion 16b on one end side of the cam pin 16 is engaged, and the cam pin 16 is pivotally supported with respect to the support piece 12 so as to be rotatable. Further, on the right edge of the base shell 1, ridges 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 them up 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. 8, the contact block 4 is disposed along the rear side of the base shell 1 and the cover shell 2, and includes a side portion 7a that closes the rear surface of the socket body 3, and a left end portion of the side portion 7a. It has a base body 7 made of an L-shaped resin molded product that projects forward and is integrally formed with a side portion 7b that is disposed along the side piece 6b of the base shell 1. A slider is located at the front right end of the side portion 7a. A round bar-shaped spring receiving projection 7c that holds one end of a coil spring 14 (urging spring) that biases 5 forward is projected, and a rectangular fitting projection 7e is formed at the right end of the upper surface of the side portion 7a. Is protruding. The side portion 7b extends from the connecting portion with the side portion 7a along the sliding direction of the memory card MC, and integrally includes a step portion 7d that faces the back surface of the memory card MC. At the corners on the shell 2 side, there are provided three engaging recesses 17 which are engaged with a protruding piece 20 of the cover shell 2 described later, spaced apart 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 7, nine contacts 10 ... corresponding to and in contact with a plurality of (9 in the case of SD memory) I / O contact surfaces (not shown) formed in parallel on the rear surface of the memory card MC are provided. The contact side of each contact 10 is protruded to the front surface (card insertion slot 3a) side of the side portion 7a. Further, in the engaging groove 33 provided on the upper surface of the side portion 7 b, the common terminal plate 30, the switch piece 31 that constitutes a contact for detecting attachment of the memory card MC together with the common terminal plate 30, and the memory card together with the common terminal plate 30 A switch piece 32 that constitutes a position detecting contact of the MC write protect switch 100 is press-fitted and fixed from the upper surface side, and the contact spring portion of each switch piece 31, 32 is a socket from a recessed portion provided on the side portion 7 b. The main body 3 is protruded in the inner direction (the storage space side of the memory card MC). Note that the soldering terminals 10a of the contacts 10... Protrude upward (on the mounting board side) from the rear surface of the side portion 7a, and the soldering terminals 30a of the common terminal plate 30 and the soldering terminals 31a of the switch pieces 31 and 32, respectively. 32a protrudes upward from the outer surface of the side portion 7b.

  On the other hand, the cover shell 2 is bent by bending the rear edge of the rectangular plate-shaped metal plate in a direction substantially perpendicular to the main surface, that is, the lower surface (corresponding to the inside of the socket body 3) as shown in FIG. A piece 19 is formed, and three projecting pieces 20 projecting in a direction substantially perpendicular to the main surface, that is, a lower surface side direction, are bent and formed slightly closer to the front end than the bent piece 19. 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. An L-shape projecting downward is formed on the front surface of the right edge of the cover shell 2. The weld piece 2a is bent.

  Further, the cover shell 2 is elastically brought into contact with the surface of the memory card MC to hold the memory card MC, and the SDIO type card is elastically contacted with a ground terminal provided on the upper surface of the SDIO card. The contact spring pieces 21, 21 are formed by punching and bending, and a shaft portion 16 b on one end side of the cam pin 16 is formed at a position facing the support piece 12 of the base shell 1 on the right end portion on the front side. By pressing the shaft portion 16b and urging the shaft portion 16b toward the support piece 12 side, a holding piece 22 that prevents the shaft portion 16b from falling off is formed by cutting and raising, and the shaft portion 16a on the other end side of the cam pin 16 is further pressed. Thus, a T-shaped elastic contact spring piece 23 for bringing the tip of the shaft portion 16a into contact with an uneven surface 15c of a guide groove 15b, which will be described later, performs punching and bending. It is formed by. Further, 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 the tip side is curved in an arc shape inward (see FIG. 7B).

  The slider 5 is a synthetic resin molded product, and as shown in FIG. 9, 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. An inclined cut formed by dropping a corner on the right side of the front portion of the memory card MC at an 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 portion 102 on the front surface is formed. Further, on the inner side surface (the left side surface in FIG. 5A) of the side portion 5a, a step portion 5d that extends from the contact portion 5c along the sliding direction of the memory card MC and faces the back surface of the memory card MC is integrated. In preparation. Then, in a state where the front portion of the memory card MC is in contact with the side portion 5b of the slider 5, the memory card MC has a memory recess in the locking recess 101 on the side surface of the step portion 5d facing the side surface of the memory card MC. A fitting projection 34 (first fitting projection) that fits from the side of the card MC (the direction orthogonal to the card insertion / removal direction and the thickness direction) protrudes from the card MC, and the bottom surface of the step 5d is for locking. A fitting projection 35 (second fitting projection) that fits in the recess 101 from the thickness direction of the memory card MC is provided. Further, as shown in FIG. 11, curved surfaces 34a and 35a are formed at the corners on both sides of the fitting protrusions 34 and 35, respectively, in the insertion / extraction direction of the memory card MC.

  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 contact 10 and the memory card MC. The slider 5 slides between the position at which it can be removed from the socket body 3.

  Further, as shown in FIGS. 9 and 11, a heart cam groove portion 15 into which the shaft portion 16 a of the cam pin 16 is movably engaged is formed on the upper surface of the front side portion of the side portion 5 a, and the rear side of the heart cam groove portion 15 is formed. A concave groove 25 into which a lock body 24 provided in the cover shell 2 is inserted is formed. FIG. 11 shows a state in which the slider 5 has moved to the lock position, and the memory card MC is omitted for ease of explanation. As shown in FIGS. 9A and 9D, 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. When the slider 5 moves back and forth, the guide groove 15b and the uneven surface 15c formed on the bottom surface of the guide groove 15b guide the relative movement of the shaft portion 16a of the cam pin 16 in the guide groove 15b. It is like that. 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 recessed when the pushing force of the memory card MC after the slider 5 is moved to the rearmost position is released. By fitting in 15d, the movement of the slider 5 in the forward direction is restricted, and the slider 5 is held at a predetermined position (see FIG. 11). Further, a protruding portion 29 protruding in the inner direction 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 and engages the tip portion (engagement piece 24b) of the lock body 24 into the locking recess 101 of the memory card MC. When the slider 5 is moved to the take-out position, the overhanging portion 29 is separated from the lock body 24, so that the lock body 24 returns to the initial position, and the tip portion of the engagement piece 24b is withdrawn from the locking recess 101. It has become. Since the concave groove 25 is positioned above the fitting protrusion 34, the lock body 24 disposed in the concave groove 25 engages with the upper portion of the locking recess 101, and the fitting protrusion 34 is The lower portion of the locking recess 101 is engaged.

  In assembling the memory card socket, the contacts 10 are first press-fitted into press-fitting holes opened on the rear surface of the base 7, and the common terminal plate 30 and the switch pieces 31 and 32 are inserted into the engaging grooves 33 of the base 7. After assembling the contact block 4 by press-fitting from above, the base 7 of the contact block 4 is placed on the upper surface of the base shell 1, and the press-fitting groove 8 that opens the protruding piece 9 of the base shell 1 to the lower surface of the base 7. The base 7 is fixed to the base shell 1 by press-fitting into (see FIG. 5B). 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 placing the slider 5 on the base shell 1 so as to fit in the groove 27, the shaft portion 16b on one end side of the cam pin 16 is engaged with the shaft hole 12a provided in the support piece 12 of the base shell, and 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 FIGS. 2 and 5A).

  Here, on the upper surface of the support piece 12 formed by folding back from the front side edge of the base shell 1, a narrow projection 12b projecting sideways is projected, and the cover shell 2 is formed on the projection 12b. Since the support step 12 is connected to the cover shell 2 by abutting the downward stepped portion of the welding piece 2a (see FIG. 3B) and joining by laser welding, the shaft on one end side of the cam pin 16 The strength of the support piece 12 provided with the shaft hole 12a on which the portion 16b is pivotally supported can be increased. Therefore, the movement of the cam pin 16 moving in the heart cam groove 15 with the movement of the slider 5 in the front-rear direction can be stabilized. As a result, the front-rear movement of the slider 5, that is, the insertion / removal operation of the memory card MC is stabilized. The insertion / extraction life of the memory card MC can be improved. Further, since the shaft portion 16b on one end side of the cam pin 16 is pressed against the support piece 12 side by the pressing piece 22 formed by cutting and raising a part of the cover shell 2, the shaft portion 16b on one end side of the cam pin 16 is supported by the support piece. It is possible to prevent the shaft 12 from dropping off from the shaft hole 12a.

  In this assembled state, the slider 5 is urged by the coil spring 14 and pushed forward (to the card insertion slot 3a side) so that the front end of the side portion 5a abuts on the support piece 12 of the base shell 1. Thus, further forward movement of the slider 5 is restricted. In this state, one end of the cam pin 16 has moved to the position A (see FIG. 9A) 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 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. In addition, the dimension between the inner edges of the side parts 5a and 7b below the step parts 5d and 7d is set to be slightly larger than the dimension of the both side widths below the downward step part 103 of the memory card MC.

  As a result, 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 becomes 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, and the surface of the memory card MC (the surface opposite to the surface on which the I / O contact surface is formed) is reversed. When facing toward the upper surface side of the base shell 1, both side portions of the memory card MC on the base shell 1 side cannot pass between the inner edges of the two stepped portions 5d and 7d, which is due to an error in the front and back direction of the memory card MC. Incorrect insertion is prevented.

  Further, a stopper piece 11a is formed by cutting and raising on the inner edge of the front side (card insertion slot 3a side) of the right end hole 11 provided corresponding to the right end contact 10 in the base shell 1 (FIG. 6 ( b)). 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 contact 10 can move to the contact position. However, when the memory card MC is to be inserted with the front-rear direction reversed, the stopper piece 11a abuts on the front surface in the insertion direction to move further. This prevents the tip of each contact 10 from being damaged by hitting the front surface of the memory card MC insertion side.

  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 moves forward until the front end of the side portion 5a abuts with the support piece 12 of the base shell 1 under the elastic force of the coil spring 14. ing. 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 elastic force of the coil spring 14 applied to the slider 5, the slider 5 moves backward in cooperation with the movement of the memory card MC. By retreating 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. 9A while being guided by the concave and convex surface 15c at the bottom of the guide groove 15b of the heart cam groove portion 15. (A) is moved to the position B in the middle (actually, the slider 5 is moved rearward so that the shaft portion 16a of the cam pin 16 moves forward in the guide groove 15b (lower in FIG. 9 (a)). Will be moved to). 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 body 7 of the contact block 4, the shaft portion 16a of the cam pin 16 reaches the position C where it 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 concave 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 engagement 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 also enters the socket body 3 at that position. Will stay. At this time, the spring load of the coil spring 14 is applied to the support piece 12 via the cam pin 16, but in the present embodiment, the support piece 12 is welded to the weld piece 2a provided on the cover shell 2 as described above. Since the support piece 12 is reinforced, the support piece 12 is not deformed even when a spring load of the coil spring 14 is applied, and the cam pin 16 can be operated stably.

  When the memory card MC moves to a predetermined position by being pushed in, the tip of each contact 10 projecting forward from the side portion 7a of the slider 5 becomes a corresponding I / O contact surface formed on the back surface of the memory card MC. It will contact sequentially. Further, the switch piece 31 protruding inward from the inner side surface of the side portion 7b of the slider 5 is pushed by the tip end portion of the memory card MC and comes into contact with the common terminal plate 30, whereby the switch piece 31, the common terminal plate 30, (That is, the attachment detection contact) is conducted, so that the switch signal can be used to detect that the memory card MC has been inserted into the proper position by an external detection circuit (not shown).

  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 switch piece 32, and the tip of the switch piece 32 is changed depending on the movement position in the concave portion 105 of the knob 104. Gets on the knob 104 or falls into the recess 105, and accordingly, between the switch piece 32 and the common terminal board 30 (that is, the position detection contact of the write protect switch 100) is turned on / off. Using this switch signal, it is possible to detect whether or not the memory card MC is in the write protect state by an external detection circuit (not shown).

  When the memory card MC inserted as described above is taken out from the socket, first, the rear portion of the memory card MC exposed to the outside is pushed in the insertion direction from the card insertion port 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 protruding portion 29 of the slider 5 moves away from the lever piece 24a of the lock body 24, so that the force to bend the lever piece 24a is lost and the lever piece 24a returns to the initial position. Since the tip of the engagement piece 24b is retracted into the concave groove 25 of the side portion 5a, 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. . When the slider 5 is further moved forward and the front end of the side portion 5a is in contact with the locking piece 12, the rear portion of the memory card MC is largely exposed to the outside from the card insertion port 3a of the socket body 3. Therefore, the memory card MC can be taken out from the socket body 3. Here, the slider 5 is locked at a predetermined position when the pushing force of the memory card MC after the movement to the last position of the slider 5 is released from the heart cam groove 15 and the cam pin 16, and the pushing into the memory card MC is performed after the locking. A slider lock means is configured to release the lock when the slider 5 moves backward due to the applied force.

  By the way, when the memory card MC is removed, the locked state of the slider 5 is released, and when the slider 5 moves forward by the spring force of the coil spring 14, the memory card MC moves forward together with the slider 5. Since the projections 34 and 35 provided on the side surface and the bottom surface of the step portion 5d of the slider 5 are fitted in the locking recess 101 of the card MC, the lock of the memory card MC by the lock body 24 is released. Even when the edge of the locking recess 101 hits the fitting protrusions 34 and 35, the memory card MC can be prevented from popping out. In addition, since curved surfaces 34a and 35a are formed at the corners of the fitting protrusions 34 and 35 in the insertion / extraction direction of the memory card MC, the locking recess 101 is inserted into the fitting protrusions 34, 35 when the memory card MC is inserted / removed. The movement when getting over 35 can be made smooth, and the operational feeling can be improved.

  Here, the dimensional tolerance in the width direction of the memory card MC (the direction perpendicular to the card insertion / removal direction and the thickness direction) is because the positional displacement of the I / O contact surface is reduced to ensure electrical connection. The fitting projection 34 provided on the slider 5 is fitted in the locking recess 101 from the side having a small dimensional tolerance, so that the fitting projection 34 and the locking projection 34 are locked. By fitting the recess 101 with certainty, the effect of preventing popping out can be obtained with certainty. Note that the fitting protrusion 34 that is fitted to the locking recess 101 from the side is fitted to the lower portion in the thickness direction of the locking recess 101, and the locking recess 101 as a whole in the thickness direction. Compared to the case where the locking recess 101 and the fitting protrusion 34 are engaged with each other, the resistance force generated when the memory card MC is taken out can be prevented from being excessively increased. Yes.

  Further, in this embodiment, in addition to the fitting protrusion 34 that is fitted to the locking recess 101 from the side, the fitting protrusion 35 that is fitted to the locking recess 101 from the thickness direction is provided. Since both 34 and 35 are fitted into the locking recess 101, the memory card MC can be more reliably prevented from popping out. Note that only the fitting protrusion 34 that fits into the locking recess 101 may be provided from the width direction where the dimensional tolerance is severe, and since the variation in the dimensional accuracy in the width direction of the memory card MC is small, the fitting protrusion 34 The variation in the engagement allowance between the locking recesses 101 and the locking recesses 101 can be reduced, and even when only the fitting protrusions 34 are provided, the effect of preventing the memory card MC from popping out can be sufficiently obtained.

  In the memory card socket of the present embodiment, only one of the upper and lower metal shells (base shell 1 and cover shell 2) is press-fitted and fixed to the base 7 of the contact block 4, and the other cover shell 2 is fixed. Is joined to the base shell 1 by laser welding, and the force for press-fitting the cover shell 2 into the base body 7 as in the case where the cover shell 2 is press-fitted and fixed to the base body 7 on which the base shell 1 is press-fitted and fixed. Is not added to the base shell 1, so that the deformation of the base shell 1 can be prevented. Further, since the cover shell 2 is not press-fitted and fixed to the base body 7, the torsional force generated by the displacement of the press-fitted location is not applied to the cover shell 2 as in the case of press-fitting and the cover shell 2 is deformed. As a result, deformation of the socket body 3 is suppressed, and the flatness of the socket body 3 can be improved.

  Further, the cover shell 2 is not directly fixed to the base body 7 of the contact block 4, but the bent piece 19 provided at the rear end of the cover shell 2 contacts the engaging recess 18 provided on the rear surface side of the base body 7 from the rear side. The protruding piece 20 provided on the front end side slightly from the bent piece 19 is in contact with the engaging concave portion 17 provided on the front side of the base body 7 from the front side. Therefore, when a force that pushes the base 7 forward is generated by the frictional force generated between the I / O contact surface of the memory card MC and the contact 10 when the memory card MC is taken out, the upper part of the base 7 is moved forward. By receiving the pressing force with the protruding piece 20 of the cover shell 2, the base 7 can be prevented from falling forward. Further, even when the memory card MC is inserted, a force that pushes the base 7 backward is generated by the frictional force generated between the I / O contact surface of the memory card MC and the contact 10, but the top of the base 7 is pushed backward. By receiving the force with the bent piece 19 of the cover shell 2, the base 7 can be prevented from falling backward. Further, since the cover shell 2 is welded to the base shell 1 only on the left and right sides, the strength of the central portion is weakened, but a bent piece 19 that protrudes downward is formed at the rear edge of the cover shell 2 by bending. Therefore, the strength of the cover shell 2 can be increased by the bent piece 19.

  Further, in this embodiment, since the joining portion of the metal base shell 1 and the cover shell 2 is joined by laser welding, the base shell 1 and the cover shell 2 can be made completely at the same potential, and the base shell By grounding 1, the entire socket body 3 is securely grounded, so that it is resistant to static electricity and external noise, and EMI performance can be improved.

  In the present embodiment, the base 7 of the contact block 4 is press-fitted and fixed to the base shell 1 and the cover shell 2 is joined to the base shell 1 by laser welding. One of the two metal shells may be press-fitted and fixed to the base 7, and the other may be joined to one metal shell by laser welding. The cover shell 2 is press-fitted and fixed to the base 7, and the cover shell 2 and the base shell 1 may be joined by laser welding.

  Further, the memory card socket according to the present embodiment includes the contacts 10..., The common terminal plate 30, the solder terminals 10 a of the switch pieces 31 and 32, 30 a, 31 a and 32 a, and both side pieces 6 a and 6 b of the base shell 1. Is a stand-off socket in which the step portion of the mounting projection 6c protruding upward from the upper edge of the cover shell 2 protrudes upward from the upper surface of the cover shell 2, and is mounted on the mounting substrate in a state of floating from the substrate surface. By surface mounting, components can be mounted on the lower part of the socket body 3, but it goes without saying that the terminal structure may take other forms. In this embodiment, the SD memory card (registered trademark) is described as an example of the memory card. However, the size of the portion inserted into the socket is formed to be the same size as the SD memory card (registered trademark). In addition, an SDIO card (registered trademark) having a terminal arrangement similar to that of an SD memory card (registered trademark) and equipped with functional units such as an I / O interface, a PHS module, and a GPS module may be used. it can. That is, the memory card socket of the present embodiment is an SD card socket compatible with both SD memory cards (registered trademark) and SDIO cards (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. FIG. 4A is a front view, FIG. 4B is a right side view, FIG. 4C is a left side view, FIG. 4D is a top view, and FIG. It is a rear view at the time of card mounting same as the above. (A) (b) is an external appearance perspective view same as the above. The base shell which comprises the same is shown, (a) is a top view, (b) is a perspective view. The cover shell which comprises the same is shown, (a) is the perspective view seen from the front side, (b) is the perspective view seen from the back side. The contact block which comprises the same is shown, (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. The slider which comprises the same is shown, (a) is a front view, (b) is a side view, (c) is a rear view, (d) is a perspective view. It is an external appearance perspective view of the state which removed the cover shell same as the above. It is a principal part expansion perspective view of the state which removed the cover shell same as the above. It is a top view of the state which removed the cover shell same as the above.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Base shell 2 Cover shell 3 Socket body 3a Card insertion slot 5 Slider 7 Base 10 Contact 14 Energizing spring 15 Heart cam groove (slider lock means)
16 Cam pin (slider lock means)
16a, 16b Shaft portion 24 Lock body (card lock means)
34 Fitting protrusion (first fitting protrusion)
35 Fitting protrusion (second fitting protrusion)
101 Locking recess MC Memory card

Claims (3)

A socket body that is formed in a box shape with a card insertion slot open on the front, and a memory card slides through the card insertion slot;
A plurality of contacts disposed inside the socket body and respectively contacting a plurality of I / O contact surfaces provided on one surface of the memory card;
A slider that is movably arranged in the front-rear direction inside the socket body, and moves in the front-rear direction together with the memory card in accordance with the insertion / extraction operation of the memory card from the card insertion slot,
A biasing spring that constantly biases the slider forward,
A slider that locks the slider at a predetermined position when the pushing force of the memory card is released after moving to the rearmost position of the slider, and releases the lock when the pushing force to the memory card is applied after the locking and the slider moves backward Locking means,
A card locking means for locking the memory card by engaging the locking recess of the memory card when the slider is locked at the predetermined position;
The first fitting that fits from the side of the memory card into the locking recess of the memory card on the side of the slider that is disposed opposite to the side of the memory card with the front part of the memory card in contact with the slider A socket for a memory card, characterized by a protrusion.   2. The memory card socket according to claim 1, wherein a corner portion of the first fitting protrusion is formed in a curved shape in the insertion / extraction direction of the memory card.   With the front part of the memory card in contact with the slider, the memory card is fitted into the locking recess of the memory card from the thickness direction of the memory card on the surface of the slider disposed opposite to the surface of the memory card in the thickness direction. 3. The memory card socket according to claim 1, wherein a second fitting protrusion is provided in a protruding manner.

Images