Abstract:
A card connector into and from which a card is inserted and removed, includes a plurality of contacts each having a contact portion to contact the card, a housing arranging and holding the contacts and having a fitting opening for inserting the card, a guide frame formed integrally with or separately from the housing and having guide portions for guiding the card to the contacts, a shell enclosing that part of the guide frame in which removing device is installed for removing the card from the card connector, and terminals arranged on the side of the leading end of the fitting opening for preventing troubles caused by static electricity. One of the terminals is provided with an extending piece extending onto the side opposite from the connection portion to be connected to a substrate. The shell is provided with an extending portion adapted to contact the extending piece. The card connector thus constructed is free from secondary discharge.

Description:
BACKGROUND OF THE INVENTION 
   This invention relates to a card connector for use in electric and electronic appliances such as personal computers, printers and the like, and more particularly to a card connector with a structure for preventing troubles caused by electro-static discharge (ESD). 
   There have been many kinds of cards as media for a wide variety of information. It has been a common practice to obtain or store various information from or onto a card inserted in a card connector which is connected to an information appliance. 
   In order to connect a card to a card connector, the card connector is provided with a fitting opening for inserting the card thereinto, and contacts having a contact portion are provided in the card connector so as to extend the contact portions into the fitting opening so that upon the card being inserted, said card is brought into contact with the contact portions of the contacts, thereby achieving continuity therebetween. As only a small portion of said card extends from said card connector, ejector means as disclosed in a Patent Literature described below has been provided in order to remove said card from said connector. Card connectors have been disclosed in the following Patent Literatures 1 and 2. 
   Patent Literature 1 
   According to the ABSTRACT of Japanese Patent Application Opened No. 2000-58,197, the invention has an object to provide an IC card connector which has a reduced overall height and is simple in construction and which is able to be readily changed from standard mounting to reverse mounting and has a variable standoff state. An IC card connector having the following construction is disclosed. A frame portion  2  includes a pair of guide frames  3  made of a synthetic resin and a metal bridge  4  connecting one ends of the guide frames  3  so that the frame portion  2  is substantially U-shaped. Incorporated in the bridge are a lever  5  and a plate  6  which form part of an ejector mechanism for removing the IC card. An ejector button  8  is slidably mounted on one of the guide frames. When the ejector button  8  is slidably moved, the lever is rotated to cause the plate to be slid, thereby ejecting the IC card from the IC card connector. In order to prevent the IC card turned upside down from being inserted into the connector, one of the guide frames is formed with a thin polar key  3 A, and the other guide frame is formed with a thick polar key, and both the guide frames are in symmetry except for the polar keys so that the guide frames on the left and right sides can be changed with each other. 
   In connection therewith, claim 1 of the Japanese Patent Application Opened No. 2000-58,197 recites an IC card connector comprising a frame portion including a pair of guide frames made of a synthetic resin and a metal bridge connecting one ends of said guide frames so that said frame portion is substantially U-shaped, a lever and a plate incorporated in said bridge as part of an ejector mechanism for ejecting the IC card from the connector, and an ejector button slidably mounted on one of said guide frames for causing said lever to rotate, thereby ejecting said IC card by a sliding movement of said plate caused by rotation of said lever. Claim 2 recites an IC card connector whose frame portion including a pair of guide frames made of a synthetic resin and a metal bridge connecting one ends of said guide frames so that said frame portion is substantially U-shaped, and the pair of guide frames made of the synthetic resin of said substantially U-shaped frame portion are each formed with a polar key on the side opposite from an opening portion, said polarities of the keys being different from each other, for preventing an IC card turned upside down from being inserted, while said pair of guide frames are configured in symmetry except for said polar keys so that said guide frames on the left and right sides can be changed with each other. Claim 3 recites an IC card connector whose frame portion including a pair of guide frames made of a synthetic resin and a metal bridge connecting one ends of said guide frames so that said frame portion is substantially U-shaped, and the pair of guide frames made of the synthetic resin of said substantially U-shaped frame portion each having an earth lug incorporated therein, said earth lugs having a hook pin integrally formed therewith for anchoring said earth lugs to a printed substrate. Claim 4 recites the IC card connector as set forth in claim 3 including said earth lugs each having a positioning portion as its integral part adapted to abut against said printed substrate, and heights of said hook pins and said positioning portions being variable. 
   Patent Literature 2 
   According to the ABSTRACT of Japanese Patent Application Opened No. 2003-208,935, the invention has an object to provide a connector which is never bent or dislodged from a substrate upon impact. The connector comprises contacts  10 , an insulator  20  for holding the contacts, and fixing members  30  fixed to a substrate for holding the insulator  20  mounted on said substrate  120 , thereby enabling a connection object to be moved in a connection direction A so as to be connected to said contacts  10  and to be moved in a disconnection direction B so as to be disconnected from said contacts  10 , wherein said fixing members  30  each comprise an abutment surface  30   c  extending from an opposite surface  20   a  of said insulator in said disconnection direction so that said abutment surface  30   c  abuts against the end face of said connection object on the side of said connection direction. 
   In connection therewith, claim 1 of the Japanese Patent Application Opened No. 2003-208,935 recites a connector including electrically conductive contacts, an insulator for holding said contacts, and fixing members fixed to a substrate for holding said insulator mounted on said substrate, thereby enabling a connection object to be moved in a connection direction so as to be connected to said contacts and to be moved in a disconnection direction opposite to the connection direction so as to be disconnected from said contacts, wherein said fixing members each comprise an abutment surface facing to the end face of said connection object and extending from an opposite surface of said insulator in said disconnection direction so that said abutment surface abuts against the end face of said connection object on the side of said connection direction when said connection object is being moved in said connection direction to bring it into contact with said contacts. Claim 2 recites the connector as set forth in claim 1 including said fixing members each comprising a press-fitting portion in the form of a plate-shape adapted to be press-fitted into said insulator and a fixed portion in the form of a plate-shape adapted to be fixed to said substrate, said abutment surface being one in its thickness direction which extends across the plate surface of said fixing member. 
   Static electricity will be frequently accumulated in cards generally used. When a card with the stored static electricity is brought into contact with contacts of a connector, the stored static electricity is liable to cause short circuit and malfunctionings of the connector and peripheral equipment. In usual, therefore, a contact (terminal) is used as an approach to preventing the troubles caused by the stored static electricity so that before contacting between the card and said contacts, the card is brought into contact with the contact (terminal) for this approach to discharge the static electricity through the contact (terminal) to a frame ground (FG) or substrate as in the Patent Literatures described above. 
   With the configurations disclosed in the Patent Literatures, however, there have been many cases that the stored static electricity would discharge at clearances between the contact (terminal) for this approach and metal bridges (so-called secondary discharge), before it discharges from the contact (terminal) to the frame ground (FG) or a substrate. The secondary discharge leads to occurrence of noise which disturbs the signal line, resulting in malfunctioning of the card. This problem remains to be solved. 
   SUMMARY OF THE INVENTION 
   In view of the problems of the prior art described above, it is an object of the invention to provide a card connector having a construction enabling the secondary discharge of static electricity to be prevented. 
   The object of the invention as described above can be accomplished by the card connector  10  into and from which a card  60  is inserted and removed, according to the invention, including a plurality of contacts  14  each having a contact portion  141  adapted to contact said card  60 , a housing  12  arranging and holding said contacts  14  and having a fitting opening  28  into which said card  60  is inserted, a guide frame  16  formed integrally with or separately from said housing  12  and having guide portions for guiding said card  60  to said contacts  14 , a shell  18  enclosing that part of said guide frame  16  in which removing means is installed, terminals  20  arranged on the side of the leading end of said fitting opening  28  for preventing troubles caused by static electricity, and the removing means for removing said card  60  from said card connector  10 , wherein at least one of said terminals  20  is provided with an extending piece  201  extending onto the side of the terminal opposite from its connection portion to be connected to a substrate, and said shell  18  is provided with an extending portion  182  adapted to contact said extending piece  201 . 
   According to a preferred embodiment, said shell  18  is further provided with an extending portion  182  on the side opposite from said extending piece  201  for preventing said terminal  20  from tilting. 
   As can be seen from the above description the card connector  10  according to the invention can bring about the following significant functions and effects. 
   (1) In an card connector  10  into and from which a card  60  is inserted and removed, including a plurality of contacts  14  each having a contact portion  141  adapted to contact said card  60 , a housing  12  arranging and holding said contacts  14  and having a fitting opening  28  into which said card  60  is inserted, a guide frame  16  formed integrally with or separately from said housing  12  and having guide portions for guiding said card  60  to said contacts  14 , a shell  18  enclosing that part of said guide frame  16  in which removing means is installed, terminals  20  arranged on the side of the leading end of said fitting opening  28  for preventing troubles caused by static electricity, and the removing means for removing said card  60  from said card connector  10 , according to the invention at least one of said terminals  20  is provided with an extending piece  201  extending onto the side of the terminal opposite from its connection portion to be connected to a substrate, and said shell  18  is provided with an extending portion  182  adapted to contact said extending piece  201 . Accordingly, the secondary discharge can be reliably prevented and hence no noise occurs so that malfunctioning of the card can be prevented. 
   (2) According to the invention, said shell  18  is further provided with an extending portion  182  on the side opposite from said extending piece  201  for preventing said terminal  20  from tilting. Consequently, said extending piece  201  of said terminal  20  can be securely brought into contact with said extending portion  182  of said shell  18  to prevent the secondary discharge. 
   The invention will be more fully understood by referring to the following detailed specification and claims taken in connection with the appended drawings. 

   
     BRIEF DESCRIPTION OF THE DRAWINGS 
       FIG. 1A  is a perspective view of the card connector according to the invention viewed from the above on the side where a card is inserted; 
       FIG. 1B  is a perspective view of the card connector according to the invention viewed from the below on the side where a card is inserted; 
       FIG. 2A  is a perspective view of the card connector according to the invention with a card inserted, viewed from the above on the side where the card is inserted; 
       FIG. 2B  is a perspective view of the card connector shown in  FIG. 2A  viewed from the below on the side where the card is inserted; 
       FIG. 3  is a partly enlarged perspective view of a shell for use in the card connector according to the invention, which incorporates therein an ejector button, a cam pin frame, a heart cam plate, and an elastic body, and is in contact with a terminal; 
       FIG. 4A  is a perspective view of the terminal held by the shell; 
       FIG. 4B  is a perspective view of a terminal held on the opposite side of the shell; 
       FIG. 5  is a perspective view of the shell; 
       FIG. 6  is a perspective view of a housing; 
       FIG. 7  is a perspective view of a contact; 
       FIG. 8A  is a perspective view of a guide frame viewed from the above on the side of the fitting opening; 
       FIG. 8B  is a perspective view of the guide frame viewed from the below on the side of the fitting opening; 
       FIG. 9  is a perspective view of a slider plate; 
       FIG. 10  is a perspective view of a slider arm; 
       FIG. 11  is a perspective view of a metal frame; 
       FIG. 12  is a perspective view of the shell with the ejector button, the cam pin frame, the heart cam plate and the elastic body incorporated therein; and 
       FIG. 13  is a perspective view of a fixture. 
   

   DESCRIPTION OF THE PREFERRED EMBODIMENTS 
   One embodiment of the card connector according to the invention will be explained with reference to  FIGS. 1A to 13 . The card connector according to the embodiment is configured to receive a CompactFlash card (registered trademark).  FIG. 1A  is a perspective view of the card connector according to the invention viewed from the above on the side where the card is inserted, and  FIG. 1B  is a perspective view of the card connector shown in  FIG. 1A  viewed from the below on the side where the card is inserted.  FIG. 2A  is a perspective view of the card connector with the card inserted, viewed from the above on the side where the card is inserted, and  FIG. 2B  is a perspective view of the card connector shown in  FIG. 2A  viewed from the below on the side where the card is inserted.  FIG. 3  is a partly enlarged perspective view of a shell for use in the card connector according to the invention, which incorporates therein an ejector button, a cam pin frame, a heart cam plate, and an elastic body and is in contact with a terminal.  FIG. 4A  is a perspective view of the terminal to be held by the shell, while  FIG. 4B  is a perspective view of a terminal to be held on the opposite side of the terminal shown in  FIG. 4A .  FIG. 5  is a perspective view of the shell.  FIG. 6  is a perspective view of a housing and  FIG. 7  is a perspective view of a contact.  FIG. 8A  is a perspective view of a guide frame viewed from the above on the side of the fitting opening, while  FIG. 8B  is a perspective view of the guide frame viewed from the below on the side of the fitting opening.  FIG. 9  is a perspective view of a slider plate, while  FIG. 10  is a perspective view of a slider arm and  FIG. 11  is a perspective view of a metal frame.  FIG. 12  is a perspective view of the shell with the ejector button, the cam pin frame, the heart cam plate and the elastic body incorporated therein.  FIG. 13  is a perspective view of a fixture. 
   The card connector  10  according to the invention at least comprises contacts  14 , a housing  12 , card removing means, a shell  18 , terminals  20 , and a guide frame  16 . 
   Before explaining the components of the card connector, the cards  60  will be explained. The cards  60  are used for printers, card readers and the like. The cards  60  each mainly comprise contact portions adapted to contact the contact portions  141  of the contacts  14 , patterns connecting from the contact portions of the card to circuits, and connection portions adapted to be connected to integrated circuits and central processing units mounted on the patterns. Cards  60  to be used for the card connector  10  according to the invention include Multimedia card (registered trademark), SD card (Secure Digital memory card) (registered trademark), Mini-SD card (Mini Secure Digital memory card) (registered trademark), Memory Stick card (registered trademark), SmartMedia card (registered trademark), CompactFlash card (registered trademark), xD card (registered trademark), RS-MMC card (Reduce Size MMC card) (registered trademark), Transflash card (registered trademark), S card (registered trademark), Memory-stick Duo card (registered trademark) and the like, these being IC cards having built-in CPU or IC for memory. 
   The card connector  10  in the illustrated embodiment is configured to have a structure into which a CompactFlash card (CF card) (registered trademark) can be inserted. 
   The components of the card connector will be explained. First, referring to  FIGS. 1A ,  1 B,  4 A and  4 B, the terminals  20  will be explained which are concerned with an important aspect of the invention. Said terminals  20  are made of a metal and formed by means of the press-working of the known technique. Preferred metals from which to form the terminals  20  include brass, beryllium copper, phosphor bronze and the like which comply with the requirements as to springiness, electric conductivity and the like. Said terminals  20  are provided on said guide frame  16 , one on each of guide portions  162  on both sides of the guide frame  16 . Each of said terminals  20  at least comprises a card contact portion  202  adapted to contact said card  60 , locking portions  205  adapted to engage said guide frame  16 , engaging pieces  204 , and a connection leg  203  to be connected to a substrate. Moreover, said terminal  20  to be located on the side of the guide frame  16  provided with said shell  18  and ejector means further comprises an extending piece  201  adapted to contact an extending portion  182  of said shell  18  (see  FIG. 3 ). 
   As described above, said terminal  20  on the side of the guide frame  16  provided with said shell  18  and ejector means is provided with the extending piece  201  extending in the direction opposite from the connection leg  203  as shown in  FIG. 4A . Said extending piece  201  of the terminal  20  is brought into contact with the extending portion  182  of said shell  18  to prevent secondary discharge. The size and shape of said extending piece  201  may be any ones insofar as the extending piece  201  can contact the extending portion  182  of the shell  18  and may be suitably designed in consideration of miniaturization of the connector, and strength and electrically contacting ability of the terminal. In the illustrated embodiment, the extending piece  201  is in the form of a plate and extends on the order of 1.2 mm to 1.6 mm. 
   As described above, each of said terminals  20  is provided with the connection leg  203  in the form of clevis or yoked type extending (on the connection side to the substrate) in the direction opposite from said extending piece  201 . Said connection leg  203  is made to be a clevis-shape to provide a springiness to it which makes it easy to fix (or insert) the terminal to (or into) the substrate. The shape of the connection leg  203  may be any one which enables the terminal  20  to be fixed to or inserted into the substrate and may be suitably designed in consideration of its strength and function. 
   As described above, each of said terminals  20  is provided with the card contact portion  202  extending onto the card insertion side and adapted to contact said card  60 . The term “the card insertion side” used herein means the side of a fitting opening  28  of the housing for inserting the card  60  into the card connector  10 . When the card contact portion  202  contacts said card  60 , static electricity flows through said terminals  20  into the substrate. The shape and size of said card contact portion  202  may be any ones so long as the card contact portion  202  can contact said card  60  and may be suitably designed in consideration of the function (causing the static electricity to flow to the substrate), electrically contacting ability, strength, and the like. It is desirable to bend the tips of the card contact portions  202  in a manner facilitating the contact with said card  60  without scratching the card  60 . 
   As described above, each of said terminals  20  is provided with locking portions  205  which are substantially U-shaped for the purpose of engaging and fixing the terminal  20  to said guide frame  16 . Said locking portions  205  need only be able to engage said guide frame  16 , thereby enabling the terminal  20  to be fixed to the guide frame  16 , and may be suitably designed in consideration of the springiness, strength and the like of the terminal  20 . The two locking portions  205  of the terminal are formed as shown in the drawings by cutting one locking portion at its middle to provide elasticity to the locking portions  205 . 
   As described above, each of said terminals  20  is provided with the engaging pieces  204  substantially L-shaped on both the sides in the width direction on the opposite side of said locking portions  205  for the purpose of holding said terminal  20  in the vertical direction. Said engaging pieces  204  cooperate with said locking portions  205  to fix said terminal  20  in its vertical position to said guide frame  16 . The shape and size of the engaging pieces  204  may be any ones insofar as the terminal  20  can be fixed thereat and may be suitably designed in consideration of the function and strength of the engaging pieces  204 . 
   Said shell  18  will then be explained which is another important aspect of the invention. Said shell  18  is made of a metal and formed by means of the press-working of the known technique. Preferred metals from which to form said shell  18  include brass, beryllium copper, phosphor bronze and the like which comply with the requirements as to workability, strength, electric conductivity, manufacturing cost, and the like. As shown in  FIG. 5 , said shell  18  has a substantially U-shaped cross-section and at least comprises the extending portions  182  adapted to contact the extending piece  201  and the connection leg  203  of said terminal  20 , respectively, an engaging recess  181  covering part of said guide frame  16  accommodating the card removing means, and an urging piece  183  for urging said heart cam plate  34 . 
   Said shell  18  serves to enclose the integral unit including said ejector button  30 , said cam pin plate  32 , said heart cam plate  34 , and said elastic body  36 . For this purpose, said shell  18  includes the engaging recess  181  as shown in  FIG. 5  into which the integral unit including said ejector button  30 , said cam pin plate  32 , said heart cam plate  34 , and said elastic body  36  can be inserted. The shape and size of said engaging recess  181  may be any ones so long as the integral unit including said ejector button  30 , said cam pin plate  32 , said heart cam plate  34 , and said elastic body  36  can be inserted into the engaging recess  181 , and the shell  18  can be fixed to said guide frame  16 , and may be suitably designed in consideration of the workability, strength, electric conductivity, cost and the like. 
   As described above, the shell is provided with the urging piece  183  in the engaging recess  181  for urging said heart cam plate  34  toward said cam pin plate  32 . The shape, size and position of said urging piece  183  may only need to be able to urge said heart cam plate  34  toward said cam pin plate  32  and may be suitably designed in consideration of such a function, its springiness, strength and the like. 
   As shown in  FIGS. 3 ,  5  and  12  and as described above, said shell  18  is provided with the extending portion  182  adapted to contact the extending piece  201  of said terminal. Said extending portion  182  is provided at the location making it possible to contact the extending piece  201  of said terminal  20 . The shape and size of said extending portion  182  may need only be able to contact said extending piece  201  and may be suitably designed in consideration of the strength, contact force, continuity, workability and the like. In the illustrated embodiment, the extending portion  182  extends in a substantially trapezoid manner. 
   In order to vertically hold said terminal  20 , it is desirable to provide the extending portions  182  on both the sides of the U-shaped cross-section. 
   Said housing  12  will then be explained. The housing  12  is formed from an electrically insulating plastic material by means of the injection molding of the known technique. The materials for the housing  12  may be suitably selected in consideration of dimensional stability, workability, manufacturing cost, and the like and in generally include polybutylene terephthalate (PBT), polyamide (66PA or 46PA), liquid crystal polymer (LCP), polycarbonate (PC) and the like and combination thereof. As shown in  FIG. 6 , said housing  12  is substantially hexahedral and is formed with inserting holes  12  into which said contacts  14  are inserted. The shape and size of said inserting holes  12  may need only be able to hold said contacts  14  and may be suitably designed in consideration of the shape and size of said contacts  14  and strength and the like of said housing  12 . Moreover, said housing  12  is provided with holes, one at each of the longitudinal ends, for inserting said fixtures  38 . 
   Said contacts  14  will then be explained. Said contacts  14  are made of a metal and formed by means of the press-working of the known technique. Preferred metals from which to form the contacts  14  include brass, beryllium copper, phosphor bronze and the like which comply with the requirements as to springiness, electric conductivity and the like. As shown in  FIG. 7 , said contact  14  is substantially crank-shaped and at least comprises a contact portion  141  adapted to contact said card  60 , a fixed portion to be held in said housing  12 , and a connection portion  143  to be connected to a substrate (not shown). The contacts  14  are fixed to the housing  12  by press-fitting, hooking (lancing) or the like such that the contact portions  141  extend from the housing  12  into its fitting opening  28 . Extending distances of said contact portions  141  into said fitting opening  28  may be suitably designed in consideration of specifications and the like of said card  60 . 
   Referring to  FIGS. 8A and 8B , the guide frame  16  is explained. Said guide frame  16  is formed from an electrically insulating plastic material by means of the injection molding of the known technique. The materials for the guide frame  16  may be suitably selected in consideration of dimensional stability, workability, manufacturing cost, and the like and in generally include polybutylene terephthalate (PBT), polyamide (66PA or 46PA), liquid crystal polymer (LCP), polycarbonate (PC) and the like and combination thereof. As shown in  FIGS. 8A and 8B , said guide frame  16  is substantially U-shaped and at least comprises guide portions  162  arranged in the longitudinal direction symmetrically with respect to the inserting direction of the card, and a jointing portion  161  for connecting the guide portions  162 . 
   Said guide frame  16  and said housing  12  cooperate with each other to form the fitting opening  28  for inserting said card  60 . Each of said guide portions  162  arranged in symmetry is formed in the inner side with a guide groove  163  for guiding said card  60  to said contacts  14 . The size and shape of said guide grooves  163  may need only be able to guide said card  60  to said contacts  14  and may be suitably designed in consideration of such a function, the shape and size of said card  60 , the strength of said guide portions  162 , and the like. 
   Moreover, each of said guide portions  162  is provided at the end remote from the card insertion side with a card abutment surface  164  against which said card  60  abuts. The guide portion  162  and the card abutment surface  164  form a substantially L-shape. Said card abutment surfaces  164  also serve as positioning means for said slider plate  22  whose pushing-out pieces  222  (later described) abut against the card abutment surfaces  164 , respectively. 
   Further, each of said guide portions  162  is provided with a projection  168  on the side of said card abutment surface  164 , which is adapted to engage a hole  265  of said metal frame  26 , for positioning the metal frame  26  relative to the guide frame  16  by the engagement of the projections  168  with the holes  265  of the metal frame  26 . 
   Referring also to  FIGS. 4A and 4B , each of said guide portions  162  is formed with a hole  167  on the card insertion side, through which the card contact portion  202  of said terminal  20  extends into said fitting opening  28 . The size and shape of said holes  167  need only allow the card contact portions  202  to extend therethrough, and may be suitably designed in consideration of the strength of the guide portions and the function of the holes  167 . In the illustrated embodiment, the holes  167  are rectangular for facilitating forming of the holes  167 . 
   Moreover, each of said guide portions  162  is provided in the proximity of said hole  167  with latches  165  with which the locking portion  205  of said terminal  20  is engaged and with anchoring grooves  166  with which said engaging pieces  204  are engaged, respectively. The sizes and shapes of said latches  165  and said anchoring grooves  166  only need to permit said terminals  20  to be vertically held and may be suitably designed in consideration of their functions, the strength and workability of the guide portions  162 . 
   Positions of said latches  165 , said anchoring grooves  166 , and said holes  167  may be suitably designed in consideration of the functions of said terminals  20  (the approach to static electricity), strengths and the like. 
   Said slider plate  22  will then be explained. Said slider plate  22  is made of a metal and formed by means of the press-working of the known technique. Preferred metals from which to form said slider plate  22  include brass, beryllium copper, phosphor bronze and the like which comply with the requirements as to workability, strength, electric conductivity, slidability, and the like. As shown in  FIG. 9 , said slider plate  22  is a substantially plate-shaped piece and at least comprises the pushing-out pieces  222  for pushing out said card  60 , guide pieces  223  for moving said slider plate  22  in a direction parallel to the inserting direction of said card  60 , anchoring pieces  224  adapted to engage said metal frame  26 , and an anchoring projection piece  221  adapted to engage said slider arm  24 . 
   Said slider plate  22  is a member for removing said card  60  and has the substantially L-shaped pushing-out pieces  222  at both the longitudinal ends for pushing out said card  60 . Said pushing-out pieces  222  need only be able to push out said card  60  and may be suitably designed in consideration of their function, the strength, balancing upon pushing out, and the like. 
   Moreover, as described above said slider plate  22  is provided at the middle of its length with the anchoring projection piece  221  adapted to engage the engaging hole  243  of said slider arm  24 . By the engagement of said anchoring projection piece  221  with said engaging hole  243 , said slider plate  22  and said slider arm  24  are connected to each other so that said slider plate  22  is moved in conjunction with the movement of said slider arm  24 . 
   As described above, said slider plate  22  is provided at both the longitudinal ends with the anchoring pieces  224  adapted to engage anchoring holes  264  of said metal frame  26  and further with the guide pieces  223 . Said guide pieces  223  are brought into contact with the side surfaces of the guide portions  162  of said guide frame  16  so that said slider plate is moved in a direction parallel to the inserting direction of said card. Said anchoring pieces  224  engage the anchoring holes  264  of said metal frame  26  so that the slider plate  22  is moved in the direction parallel to the inserting direction of said card and is prevented from moving in the direction of thickness of the slider plate  22 . The sizes and shapes of said guide pieces  223  and said anchoring pieces  224  may be suitably designed in consideration of these functions, strength, workability, slidability and the like. In the illustrated embodiment, as shown in  FIG. 9  said guide pieces  223  are plate-shaped pieces which extend onto the side opposite to the card insertion side and have a bent tip. As shown in  FIG. 9 , moreover, said anchoring pieces  224  are plate-shaped pieces which extend onto the card insertion side and have an extended tip. 
   The positions of said guide pieces  223  and said anchoring pieces  224  may be suitably designed in consideration of the functions described above, high slidability, the balancing upon sliding, and the like. 
   Said slider arm  24  will then be explained. Said slider arm  24  is made of a metal and formed by means of the press-working of the known technique. Preferred metals from which to form said slider arm  24  include brass, beryllium copper, phosphor bronze and the like which comply with the requirements as to workability, strength, electric conductivity, pivotally (rotationally) movable property, and the like. As shown in  FIG. 10 , said slider arm  24  is substantially a plate-shaped piece and at least comprises the engaging hole  243  adapted to engage the anchoring projection piece  221  of said slider plate  22 , a bearing hole  242  to be fitted with a punched out projection  262  of said metal frame  26  so as to support said slider arm  24  by said projection  262 , and a pressure receiving piece  241  adapted to be urged by an urging surface  322  of said cam pin plate. 
   As described above, said slider arm  24  is provided at one end with the pressure receiving piece  241  extending onto the card insertion side and adapted to be urged by the urging surface  322  of said cam pin plate  32  and at the other end with the engaging hole  243  adapted to engage the anchoring projection piece  221  of said slider plate  22 . The shapes and the sizes of said pressure receiving piece  241  and said engaging hole  243  may be suitably designed in consideration of their functions, smooth pivotal movement and strength of the slider arm  24  and the like. 
   As described above, said slider arm  24  is formed at the middle of its length with the bearing hole  242  to be fitted with the projection  262  of said metal frame  26  for supporting the slider arm  24  relative to the metal frame  26 . The shape and size of said bearing hole  242  need only be able to support said slider arm  24  by said projection  262  of the metal frame  26 , and may be suitably designed in consideration of the function, strength and workability of the slider arm  24 . 
   As described above, the projection  262  of said metal frame  26  is fitted in the bearing hole  242  of said slider arm  24  so as to support the slider arm  24  by the projection  262  of said metal frame  26 , and the engaging hole  243  of said slider arm  24  is engaged with the anchoring projection piece  221  of said slider plate  22  so that said slider plate  22 , said slider arm  24  and said metal frame  26  are connected to one another. In this way, when said slider arm  24  is pivotally moved about the projection  262  of said metal frame  26 , said slider plate  22  is also moved in conjunction with such a pivotal movement. 
   Said metal frame  26  will then be explained. Said metal frame  26  is made of a metal and formed by means of the press-working of the known technique. Preferred metals from which to form said metal frame  26  include brass, beryllium copper, phosphor bronze and the like which comply with the requirements as to workability, strength, electric conductivity and the like. As shown in  FIG. 11 , said metal frame  26  is substantially U-shaped and at least comprises engaging grooves  261  adapted to engage the guide portions  162  of said guide frame  16 , respectively, the projection  262  to be fitted in the bearing hole  242  of said slider arm  24 , the anchoring holes  264  adapted to engage the anchoring pieces  224  of said slider plate  22 , respectively, and contact pieces  263  adapted to contact said card  60 . 
   Said metal frame  26  is provided at both longitudinal ends with engaging portions  266  having a U-shaped cross-section and extending onto the card insertion side. Each of said engaging portions  266  is provided at the tip with a contact piece  263  adapted to contact the upper surface of said card  60 . 
   Each of said engaging portions  266  having the U-shaped cross-section is provided with the engaging groove  261  adapted to engage part of the guide portion  162  of said guide frame  16 . The size and shape of said engaging groove need only be able to engage the part of the guide portion  162  of said guide frame  16  and may be suitably designed in consideration of the size of the guide portion  162 , miniaturization and strength of the card connector. 
   Each of said engaging portion  266  is formed with the anchoring hole  264  adapted to engage the anchoring piece  224  of said slider plate  22  and the hole  265  adapted to engage the projection  168  of said guide frame  16 . The size and shape of said anchoring holes  264  and said holes  265  may be suitably designed in consideration of the functions described above, the strength, workability and the like of the metal frame  26 . 
   Moreover, said metal frame  26  is provided with the projection  262  at a location corresponding to the bearing hole  242  of said slider arm  24  to be fitted in the bearing hole  242 . The projection  262  of said metal frame  26  is fitted in the bearing hole  242  of said slider arm  24  so as to support the slider arm  24  by the projection  262  of said metal frame  26 , and the engaging hole  243  of said slider arm  24  is engaged with the anchoring projection piece  221  of said slider plate  22  so that said slider plate  22 , said slider arm  24  and said metal frame  26  are connected to one another. In this way, when said slider arm  24  is pivotally moved about the projection  262  of said metal frame  26 , said slider plate  22  is also moved in conjunction with such a pivotal movement. 
   The integral unit of said shell  18  including said ejector button  30 , said cam pin plate  32 , said heart cam plate  34 , and said elastic body  36  will then be explained with reference to  FIG. 12 . As shown in  FIG. 12 , the integral unit is substantially hexahedral and serves to eject said card  60  from the card connector. Said ejector button  30 , said cam pin plate  32 , and said heart cam plate  34  are formed from an electrically insulating plastic material by means of the injection molding of the known technique. The materials for these members may be suitably selected in consideration of dimensional stability, workability, manufacturing cost, and the like and in generally include polybutylene terephthalate (PBT), polyamide (66PA or 46PA), liquid crystal polymer (LCP), polycarbonate (PC) and the like and combination thereof. Said elastic body  36  is made of a metal, and commercially available coil springs are used for the elastic body depending upon customer&#39;s specifications. 
   Said ejector button  30  is substantially hexahedral and provided at one end with an actuating portion  302  and at the other end with a pin  301 . Said cam pin plate  32  is also substantially hexahedral and provided at one end with a hole  321  and at the other end with the urging surface  322  and a moving pin  323 . Said heart cam plate  34  is also substantially hexahedral and is provided at one end with an extending pin (not shown) adapted to engage said elastic body  36  and at the other end with a heart cam groove  341 . 
   Said ejection button  30 , said cam pin plate  32 , said heart cam plate  34  and said elastic body  36  are integrally combined with one another in a manner such that the pin  301  of said ejector button  30  engages the hole  321  of said cam pin plate  32 , and the moving pin  323  of said cam pin plate  32  engages the heart cam groove  341  of said heart cam plate  34 , and that the extending pin  342  of said heart cam plate  34  engages said elastic body  36 , and said elastic body  36  is embraced by said heart cam plate  34  and said ejector button  30 . 
   The fixtures  38  will then be explained. Said fixtures  38  are made of a metal and formed by means of the press-working of the known technique. Preferred metals from which to form said fixtures  38  include brass, beryllium copper, phosphor bronze and the like which comply with the requirements as to workability, dimensional stability, and the like. 
   Said fixtures  38  serve to increase the fixing (holding) strength when said card connector  10  is fixed to a substrate, and each comprise a fixed portion  381  to be fixed to said housing  12  and a connection portion  382  to be connected to the substrate. 
   Finally, the method for ejecting said card  60  from the card connector  10  will be explained. First, under the condition that said card  60  has been inserted into said card connector  10  as shown in  FIG. 2A , the actuating portion  302  of said ejector button  30  is pushed into the inserting direction of said card so that the moving pin  323  of said cam pin plate  32  integrally incorporated in the integral unit moves in the heart cam groove  341  of said heart cam plate  34 . 
   As a result of such a movement of the moving pin  323  in said heart cam groove  341 , the urging surface  322  of said cam pin plate  32  pushes the pressure receiving piece  241  of said slider arm  24  into the inserting direction of said card. As described above, the slider arm  24  is pivotally mounted on said metal frame  26  whose projection  262  is fitted in the bearing hole  242  of the slider arm  24 . Consequently, upon the pressure receiving piece  241  being pushed, the slider arm  24  is pivotally moved about the projection  262  of the metal frame  26 . 
   Since said anchoring projection piece  221  of the slider plate  22  engages the engaging hole  243  of said slider arm  24 , the pivotal movement of said slider arm  24  causes said slider plate  22  to move in a direction in parallel with the card moving direction. Said slider plate  22  is moved in the direction parallel to the card moving direction so that the pushing-out pieces  222  of said slider plate  22  push said card  60  in the direction opposite to the inserting direction of the card, thereby removing said card from the card connector  10 . When the slider plate  22  is moved in the direction parallel to the card moving direction, the slider plate  22  is assuredly moved with the aid of its guide pieces  223  and the anchoring pieces  224 . 
   Examples of applications of the present invention are card connectors for use in electronic or electric appliances such as personal computers, printers and the like, and more particularly card connectors having means with which to prevent troubles caused by electrostatic discharge (ESD). 
   While the invention has been particularly shown and described with reference to the preferred embodiments thereof, it will be understood by those skilled in the art that the foregoing and other changes in form and details can be made therein without departing from the spirit and scope of the invention.