Abstract:
This invention discloses a novel socket connector and female terminals therein. The female terminal has a contact portion and an attachment portion. The attachment portion is set to attach to a wire core, while the contact portion is set to permit a pin to plug in and contact conductively. A neck with a smaller diameter is provided between the contact portion and the attachment portion. The contact portion comprises an outer barrel and an inner tube having a plurality of spring elements extending axially. Each spring element has a biasing section toward the inner tube axis near the plug-in entrance for matching the contact pin. The other side of the spring element distant from the biasing section is connected to the inner tube. The inner tube and the outer barrel are made of a metal sheet in one-piece construction while the inner tube is connected to the neck at one end and connected to the outer barrel via the folded part at the opposite side. The outer barrel is shorter than the inner tube. A diameter shrinking part is further provided with the outer barrel near the contact pin plug-in entrance for improving the assembly to the socket connector.

Description:
CROSS REFERENCE TO RELATED APPLICATIONS  
       [0001]    This application is a Continuation of U.S. application Ser. No. 11/730,110 filed on Mar. 29, 2007. Priority is claimed based upon U.S. application Ser. No. 11/730,110 filed on Mar. 29, 2007, which claims priority from R.O.C. Patent Application No. 096103655, filed on Feb. 1, 2007, all of which is incorporated herein by reference in its entirety. 
     
    
     BACKGROUND OF THE INVENTION 
       [0002]    1. Technical Field 
         [0003]    The present invention relates to a terminal for being installed in an isolating housing to form an assembled electrical socket connector and, more particularly, to a female terminal that is made of metal and set to permit a slender pin to plug in and contact conductively. 
         [0004]    2. Description of Related Art 
         [0005]    Electrical socket connector is known as an indispensable part for connecting multi-core cables of 3C products and household appliances for signal communication. Conventional electrical socket connectors can be principally classified into either male connectors or socket connectors. A male connector typically comprises a plurality of pins and a socket connector typically comprises a plurality of terminals corresponding to said plural of pins so as to permit the pins of the male connector to plug in and contact conductively. 
         [0006]    Compared with a male connector, a socket connector requires a more complex manufacturing technique. The critical component of such socket connector is the terminals therein, which preferably have small-volume; provide guide function to the pin that are to be plugged in; and provide appropriate clamp force to ensure the connection and conduction between the terminals and the pins plugged therein. Thus, a terminal made of a metal sheet in one-piece construction has become the main stream of the development of the art. 
         [0007]    In prior arts, U.S. Pat. No. 5,720,634 discloses a female terminal formed in one-piece construction. In such prior-art female terminal, an inner tube and an outer barrel are provided at the portion in contact with a pin, wherein the outer barrel is connected to a neck of the female terminal, while the inner tube is formed by folding a metal sheet inwardly within the outer barrel. The inner tube is substantially composed of a plurality of spring elements bent with a mold in order to clamp a pin. Since the spring elements are formed as cantilevers, the inner tube is with only one end folded as a round gateway while the opposite end is opened as a free end, and thus full control of configuration of such prior-art female terminal is difficult to achieve. 
         [0008]    In prior arts, U.S. Pat. No. 6,152,787 also provides a female terminal formed in one-piece construction. In such prior-art female terminal, an inner tube and an outer barrel are provided at the portion in contact with a pin, wherein the inner tube is connected to a neck of the female terminal, while the outer barrel is formed by folding a metal sheet to enclose the inner tube. The inner tube is substantially composed of a plurality of spring elements bent with a mold in order to clamp a pin. Since the spring elements are formed as cantilevers, the inner tube is with only one end folded as a round gateway while the opposite end is opened as a free end, and thus full control of configuration of such prior-art female terminal is difficult to achieve. Actually, the configurations of U.S. Pat. No. 6,152,787 and U.S. Pat. No. 5,720,634 are very similar. The only difference therebetween is that U.S. Pat. No. 5,720,634 has the outer barrel connected to the neck of the female terminal and the inner tube is formed by folding a metal sheet inwardly within the outer barrel, while U.S. Pat. No. 6,152,787 has the inner tube connected to the neck of the female terminal, while the outer barrel is formed by folding a metal sheet to enclose the inner tube. 
         [0009]    Further, in prior arts, U.S. Pat. No. 6,358,104 discloses another female terminal formed in one-piece construction. In such prior-art female terminal, an inner tube and an outer barrel are provided at the portion in connection with a pin wherein the inner tube is connected to a neck of the female terminal, while the outer barrel is formed by folding a metal sheet to enclose the inner tube. A plurality of spring elements are deposited in the inner tube and each of the spring elements has a wavy profile in the middle portion thereof. Thereby, when the inner tube is later bent into a shape of a round gateway by a mold, the wavy portion of each said spring element leans toward the inner tube axis automatically under the bending force so as to provide a clamp force to a plugged pin. Meantime, as the U.S. Pat. No. 6,358,104 has both ends of the inner tube formed as round gateways by bending a metal sheet, both ends are not shaped as cantilevers. Thus, compared with U.S. Pat. No. 6,152,787 and U.S. Pat. No. 5,720,634, it achieves superior structure strength. 
       SUMMARY OF THE INVENTION 
       [0010]    To provide a terminal that possesses superior structure strength and can be manufactured more easily so as to remedy foresaid shortcomings of the prior arts, the present invention discloses a novel electrical socket connector and female terminals therein. The female terminal has a contact portion and an attachment portion. The attachment portion is set to attach to a wire core, while the contact portion is set to permit a pin to plug in and contact conductively. A neck with a smaller diameter is provided between the contact portion and the attachment portion. The contact portion comprises an outer barrel and an inner tube having a plurality of spring elements extending axially. Each spring element has a biasing section toward the inner tube axis near the plug-in entrance for matching the contact pin. The other side of the spring element distant from the biasing section is connected to the inner tube. The inner tube and the outer barrel are made of a metal sheet in one-piece construction, while the outer barrel is connected to the neck at one end and connected to the inner tube via the folded part at the opposite side. The inner tube is shorter than the outer barrel in order to be accommodated in the outer barrel. A diameter shrinking part is further provided with the outer barrel near the contact pin plug-in entrance for improving the assembly to the socket connector. 
         [0011]    Thus, it is one objective of the present invention to provide a female terminal in a socket connector that provides superior clamp force. 
         [0012]    It is another objective of the present invention to provide a female terminal in a socket connector that can be manufactured more easily. 
         [0013]    It is a further objective of the present invention to provide a female terminal in a socket connector that possesses superior structure strength. 
         [0014]    It is still another objective of the present invention to provide a socket connector that is equipped with plural female terminals that provide superior clamp force. 
         [0015]    It is yet another objective of the present invention to provide a socket connector that is equipped with plural female terminals that can be manufactured more easily. 
         [0016]    It is an additional objective of the present invention to provide a socket connector that is equipped with female terminals that possess superior structure strength. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0017]    The invention as well as a preferred mode of use, further objectives and advantages thereof, will be best understood by reference to the following detailed description of an illustrative embodiment when read in conjunction with the accompanying drawings, wherein: 
           [0018]      FIG. 1A  is an expanded view of the female terminal of a socket connector according to a first preferred embodiment of the present invention; 
           [0019]      FIG. 1B  is a cross sectional view of the configured female terminal of the socket connector according to the first preferred embodiment of the present invention; 
           [0020]      FIG. 2  is a partial exploded view of the female terminal of a socket connector according to a second preferred embodiment of the present invention; 
           [0021]      FIG. 3  is a partial expanded view of the female terminal of a socket connector according to a third preferred embodiment of the present invention; 
           [0022]      FIG. 4  is a partial expanded view of the female terminal of a socket connector according to a fourth preferred embodiment of the present invention; 
           [0023]      FIG. 5  is a partial expanded view of the female terminal of a socket connector according to a fifth preferred embodiment of the present invention; and 
           [0024]      FIG. 6  is a partial expanded view of the female terminal of a socket connector according to a sixth preferred embodiment of the present invention. 
       
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
       [0025]    The present invention is directed to a female terminal of a socket connector. Those of ordinary skill in the art will appreciate that the principle of the connection and conduction between the female terminal and a male terminal of the socket connector is well known and need not be discussed in great details herein. Furthermore, the accompanying drawings are provided for schematically showing the structural characters of the present invention and are not necessarily drawn to scale. 
         [0026]    Please firstly refer to  FIGS. 1A and 1B  for a first preferred embodiment of the present invention. In can be seen in the drawings that the disclosed female terminal  100  primarily comprises an attachment portion  102 , a contact portion  104 , a neck  106 , an outer barrel  108 , an inner tube  110 , a folded part  112 , a plurality of spring elements  114 , a plurality of biasing sections  116  and a diameter shrinking part  118 . 
         [0027]    The female terminal  100  is formed in one-piece construction by pressing a metal sheet in a mold and has the contact portion  104 , the attachment portion  102  distant from the contact portion  104 , and the neck  106  for joining the contact portion  104  and the attachment portion  102 . The attachment portion  102  functions for connecting a conductive wire while the contact portion  104  permits a slender pin to plug in, so as to connect and clamp the pin and establish conductive communication with the pin. The inner tube  110  of the contact portion  104  has a plurality of spring elements  114  extending axially. Each of the spring elements  114  has the end distant from biasing section  116  connected to the inner wall of the inner tube  110 , and has the end near the biasing section  116  separated from the inner wall of the inner tube  110  with a slit. Alternatively, said slit may be further extended into the form of an opening. Since the spring element  114  is separated from the inner tube  110  with the slit, the portion thereof near the entrance of the contact portion  104  becomes a free end, which can be firstly formed as the biasing section  116  toward the inner tube axis by a tool, so that after a pin is plugged into the female terminal  100 , the biasing section  116  can provide appropriate guide function and clamp force to the pin. 
         [0028]    Foresaid plural spring elements  114 , the inner tube  110  and outer barrel  108  are formed as one piece from a single metal sheet by means of, for instance, pressing method. The outer barrel  108  has one end connected with the neck  106  directly and has the opposite end connected with the inner tube  110  via the folded part  112 . The inner tube  110  is shorter than the outer barrel  108  in order to be accommodated in the outer barrel  108 . A diameter shrinking part  118  is further provided with the outer barrel  108  and contact portion  104  near the contact pin plug-in entrance for improving the assembly to the socket connector. 
         [0029]    In addition to the strip shape, the spring element  114  can also be formed into a trapezoid shape with one end broader that the opposite end or a shape with middle concaved profile as long as the portion thereof near the entrance of the contact portion  104  can become the free end, which can be formed as a biasing section  116  facing toward the inner tube axis so as to provide appropriate guide function and clamp force to the pin. Hence, on the spring element  114 , the biasing section  116  may be wider than the two ends connected to the inner tube  110 . Alternatively, the biasing section  116  may be narrower than the two ends connected to the inner tube  110 . Further, for providing preferable guide function and clamp force to pins of varied lengths, the amount of the spring elements  114  is preferably 3, which achieves better effect of guidance and balance. Nevertheless, the amount of the spring elements  114  can be 2 or other amount in consideration of special limitation or the size of the pin. 
         [0030]    Please refer to  FIG. 2  for a second preferred embodiment of the present invention. In can be seen in the drawing that the disclosed female terminal  100  primarily comprises an attachment portion  102 , a contact portion  104 , a neck  106 , an outer barrel  108 , an inner tube  110 , a folded part  112 , a plurality of spring elements  114 , a plurality of biasing sections  216  and a diameter shrinking part  118 . 
         [0031]    The female terminal  100  is formed in one-piece construction by pressing a metal sheet in a mold and has the contact portion  104 , the attachment portion  102  distant from the contact portion  104 , and the neck  106  for joining the contact portion  104  and the attachment portion  102 . The attachment portion  102  functions for connecting a conductive wire, while the contact portion  104  permits a slender pin to plug in so as to connect and clamp the pin and establish conductive communication with the pin. The inner tube  110  of the contact portion  104  has a plurality of spring elements  114  extending axially. Each of the spring elements  114  has the end distant from the biasing section  216  connected to the inner wall of the inner tube  110 , and has the end near the biasing section  216  separated from the inner wall of the inner tube  110  with a slit. Alternatively, said slit may be further extended into the form of an opening. Since the spring element  114  is separated from the inner tube  110  with the slit, the portion thereof distant from the entrance of the contact portion  104  becomes a free end, which can be firstly formed as the biasing section  216  facing toward the inner tube axis by a tool, so that after a pin is plugged into the female terminal  100 , the biasing section  216  can provide appropriate guide function and clamp force to the pin. 
         [0032]    Foresaid plural spring elements  114 , the inner tube  110  and outer barrel  108  are formed as one piece from a single metal sheet by means of, for instance, pressing method. The outer barrel  108  has one end connected with the neck  106  directly and has the opposite end connected with the inner tube  110  via a folded part  112 . The inner tube  110  is shorter than the outer barrel  108  in order to be accommodated in the outer barrel  108 . A diameter shrinking part  118  is further provided with the outer barrel  108  and the contact portion  104  near the contact pin plug-in entrance for improving the assembly to the socket connector. 
         [0033]    In addition to the strip shape, the spring element  114  can be also formed into a trapezoid shape with one end broader that the opposite end or a shape with middle concaved profile as long as the portion thereof distant from the entrance of the contact portion  104  can become the free end, which can be formed as a biasing section  216  facing toward the inner tube axis so as to provide appropriate guide function and clamp force to the pin. Hence, on the spring element  114 , the biasing section  216  may be wider than the two ends connected to the inner tube  110 . Alternatively, the biasing section  216  may be narrower than the two ends connected to the inner tube  110 . Further, for providing preferable guide function and clamp force to pins of varied lengths, the amount of the spring elements  114  is preferably 3, which achieves better effect of guidance and balance. Nevertheless, the amount of the spring elements  114  can be 2 or other amount in consideration of special limitation or the size of the pin. 
         [0034]    Please refer to  FIG. 3  for a third preferred embodiment of the present invention. In can be seen in the drawing that the disclosed female terminal  100  primarily comprises an attachment portion  102 , a contact portion  104 , a neck  106 , an outer barrel  108 , an inner tube  110 , a folded part  112 , a spring element  114 , a biasing section  316  and a diameter shrinking part  118 . 
         [0035]    The female terminal  100  is formed in one-piece construction by pressing a metal sheet in a mold and has the contact portion  104 , the attachment portion  102  distant from the contact portion  104 , and the neck  106  for joining the contact portion  104  and the attachment portion  102 . The attachment portion  102  functions for connecting a conductive wire, while the contact portion  104  permits a slender pin to plug in so as to connect and clamp the pin and establish conductive communication with the pin. The inner tube  110  of the contact portion  104  has a plurality of spring elements  114  extending axially. Each of the spring elements  114  has the end near the entrance of the contact portion  104  and the end distant from the entrance of the contact portion  104  connected to the inner wall of the inner tube  110 , and has the opposite sides separated from the inner wall of the inner tube  110  with a slit respectively. Alternatively, each said slit may be further extended into the form of an opening. Since the opposite sides of the spring elements  114  are not connected to the inner tube  110 , the middle portions of the spring elements  114  can provide relatively better elasticity and deformability. The middle portions of the spring elements  114  may be firstly formed as biasing sections  316  facing toward the inner tube axis by a tool, so that after a pin is plugged into the female terminal  100 , the biasing sections  316  can provide appropriate guide function and clamp force to the pin. 
         [0036]    Foresaid plural spring elements  114 , the inner tube  110  and outer barrel  108  are formed as one piece from a single metal sheet by means of, for instance, pressing method. The outer barrel  108  has one end connected with the neck  106  directly and has the opposite end connected with the inner tube  110  via a folded part  112 . The inner tube  110  is shorter than the outer barrel  108  in order to be accommodated in the outer barrel  108 . A diameter shrinking part  118  is further provided with the outer barrel  108  and the contact portion  104  near the contact pin plug-in entrance for improving the assembly to the socket connector. 
         [0037]    In addition the strip shape, the spring element  114  can also be formed into a trapezoid shape with one end broader that the opposite end or a shape with middle concaved profile as long as a biasing section  316  facing toward the inner tube axis can be formed at the middle portion of the spring element  114  so as to provide appropriate guide function and clamp force to the pin. Hence, on the spring element  114 , the biasing section  316  may be wider than the two ends connected to the inner tube  110 . Alternatively, the biasing section  316  may be narrower than the two ends connected to the inner tube  110 . Further, for providing preferable guide function and clamp force to pins in varied lengths, the amount of the spring elements  114  is preferably 3, which achieves better effect of guidance and balance. Nevertheless, the amount of the spring elements  114  can be 2 or other amount in consideration of special limitation or the size of the pin. 
         [0038]    Please refer to  FIG. 4  for a fourth preferred embodiment of the present invention. In can be seen in the drawing that the disclosed female terminal  100  primarily comprises an attachment portion  102 , a contact portion  104 , a neck  106 , an outer barrel  108 , an inner tube  110 , a folded part  112 , a plurality of spring elements  114 , a plurality of biasing sections  116  and a diameter shrinking part  118 . 
         [0039]    The female terminal  100  is formed in one-piece construction by pressing a metal sheet in a mold and has the contact portion  104 , the attachment portion  102  distant from the contact portion  104 , and the neck  106  for joining the contact portion  104  and the attachment portion  102 . The attachment portion  102  functions for connecting a conductive wire, while the contact portion  104  permits a slender pin to plug in so as to connect and clamp the pin and establish conductive communication with the pin. The inner tube  110  of the contact portion  104  has a plurality of spring elements  114  extending axially. Each of the spring elements  114  has the end distant from the biasing section  116  connected to the inner wall of the inner tube  110 , and has the end near the biasing section  116  separated from the inner wall of the inner tube  110  with a slit. Alternatively, said slit may be further extended into the form of an opening. Since the spring element  114  is separated from the inner tube  110  with the slit, the portion thereof near the entrance of the contact portion  104  becomes a free end, which can be firstly formed as a biasing section  116  facing toward the inner tube axis by a tool, so that after a pin is plugged into the female terminal  100 , the biasing section  116  can provide appropriate guide function and clamp force to the pin. 
         [0040]    Foresaid plural spring elements  114 , the inner tube  110  and outer barrel  108  are formed as one piece from a single metal sheet by means of, for instance, pressing method. The inner tube  110  has one end connected with the neck  106  directly and has the opposite end connected with the outer barrel  108  via a folded part  112 . The outer barrel  108  is shorter than the inner tube  110 . A diameter shrinking part  118  is further provided with the outer barrel  108  and the contact portion  104  near the contact pin plug-in entrance for improving the assembly to the socket connector. 
         [0041]    In addition the strip shape, the spring element  114  can be also formed into a trapezoid shape with one end broader that the opposite end or a shape with middle concaved profile as long as the portion thereof near the entrance of the contact portion  104  can become the free end, which can be formed as a biasing section  116  facing toward the inner tube axis so as to provide appropriate guide function and clamp force to the pin. Hence, on the spring element  114 , the biasing section  116  may be wider than the two ends connected to the inner tube  110 . Alternatively, the biasing section  116  may be narrower than the two ends connected to the inner tube  110 . Further, for providing preferable guide function and clamp force to pins of varied lengths, the amount of the spring elements  114  is preferably 3, which achieves better effect of guidance and balance. Nevertheless, the amount of the spring elements  114  can be 2 or other amount in consideration of special limitation or the size of the pin. 
         [0042]    Please refer to  FIG. 5  for a fifth preferred embodiment of the present invention. In can be seen in the drawing that the disclosed female terminal  100  primarily comprises an attachment portion  102 , a contact portion  104 , a neck  106 , an outer barrel  108 , an inner tube  110 , a folded part  112 , a plurality of spring elements  114 , a plurality of biasing sections  216  and a diameter shrinking part  118 . 
         [0043]    The female terminal  100  is formed in one-piece construction by pressing a metal sheet in a mold and has the contact portion  104 , the attachment portion  102  distant from the contact portion  104 , and the neck  106  for joining the contact portion  104  and the attachment portion  102 . The attachment portion  102  functions for connecting a conductive wire, while the contact portion  104  permits a slender pin to plug in so as to connect and clamp the pin and establish conductive communication with the pin. The inner tube  110  of the contact portion  104  has a plurality of spring elements  114  extending axially. Each of the spring elements  114  has the end distant from the biasing section  216  connected to the inner wall of the inner tube  110 , and has the end near the biasing section  216  separated from the inner wall of the inner tube  110  with a slit. Alternatively, said slit may be further extended into the form of an opening. Since the spring element  114  is separated from the inner tube  110  with the slit, the portion thereof distant from the entrance of the contact portion  104  becomes a free end, which can be firstly formed as the biasing section  216  facing toward the inner tube axis by a tool, so that after a pin is plugged into the female terminal  100 , the biasing section  216  can provide appropriate guide function and clamp force to the pin. 
         [0044]    Foresaid plural spring elements  114 , the inner tube  110  and outer barrel  108  are formed as one piece from a single metal sheet by means of, for instance, pressing method. The inner tube  110  has one end connected with the neck  106  directly and has the opposite end connected with the outer barrel  108  via a folded part  112 . The outer barrel  108  is shorter than the inner tube  110 . A diameter shrinking part  118  is further provided with the outer barrel  108  and the contact portion  104  near the contact pin plug-in entrance for improving the assembly to the socket connector. 
         [0045]    In addition the strip shape, the spring element  114  can be also formed into a trapezoid shape with one end broader that the opposite end or a shape with middle concaved profile as long as the portion thereof distant from the entrance of the contact portion  104  can become the free end, which can be formed as a biasing section  216  facing toward the inner tube axis so as to provide appropriate guide function and clamp force to the pin. Hence, on the spring element  114 , the biasing section  216  may be wider than the two ends connected to the inner tube  110 . Alternatively, the biasing section  216  may be narrower than the two ends connected to the inner tube  110 . Further, for providing preferable guide function and clamp force to pins in varied lengths, the amount of the spring elements  114  is preferably 3, which achieves better effect of guidance and balance. Nevertheless, the amount of the spring elements  114  can be 2 or other amount in consideration of special limitation or the size of the pin. 
         [0046]    Please refer to  FIG. 6  for a sixth preferred embodiment of the present invention. In can be seen in the drawing that the disclosed female terminal  100  primarily comprises an attachment portion  102 , a contact portion  104 , a neck  106 , an outer barrel  108 , an inner tube  110 , a folded part  112 , a plurality of spring elements  114 , a plurality of biasing section  316  and a diameter shrinking part  118 . 
         [0047]    The female terminal  100  is formed in one-piece construction by pressing a metal sheet in a mold and has the contact portion  104 , the attachment portion  102  distant from the contact portion  104 , and the neck  106  for joining the contact portion  104  and the attachment portion  102 . The attachment portion  102  functions for connecting a conductive wire, while the contact portion  104  permits a slender pin to plug in so as to connect and clamp the pin and establish conductive communication with the pin. The inner tube  110  of the contact portion  104  has a plurality of spring elements  114  extending axially. Each of the spring elements  114  has the end near the entrance of the contact portion  104  and the end distant from the entrance of the contact portion  104  connected to the inner wall of the inner tube  110 , and has the opposite sides separated from the inner wall of the inner tube  110  with a slit respectively. Alternatively, each said slit may be further extended into the form of an opening. Since the opposite sides of the spring elements  114  are not connected to the inner tube  110 , the middle portions of the spring elements  114  can provide relatively better elasticity and deformability. The middle portions of the spring elements  114  may be firstly formed as biasing sections  316  facing toward the inner tube axis by a tool so that after a pin is plugged into the female terminal  100 , the biasing sections  316  can provide appropriate guide function and clamp force to the pin. 
         [0048]    Foresaid plural spring elements  114 , the inner tube  110  and outer barrel  108  are formed as one piece from a single metal sheet by means of, for instance, pressing method. The inner tube  110  has one end connected with the neck  106  directly and has the opposite end connected with the outer barrel  108  via a folded part  112 . The outer barrel  108  is shorter than the inner tube  110 . A diameter shrinking part  118  is further provided with the outer barrel  108  and the contact portion  104  near the contact pin plug-in entrance for improving the assembly to the socket connector. 
         [0049]    In addition the strip shape, the spring element  114  can also be formed into a trapezoid shape with one end broader that the opposite end or a shape with middle concaved profile as long as the biasing section  316  facing toward the inner tube axis can be formed at the middle portion of the spring element  114  so as to provide appropriate guide function and clamp force to the pin. Hence, on the spring element  114 , the biasing section  316  may be wider than the two ends connected to the inner tube  110 . Alternatively, the biasing section  316  may be narrower than the two ends connected to the inner tube  110 . Further, for providing preferable guide function and clamp force to pins in varied lengths, the amount of the spring elements  114  is preferably 3, which achieves better effect of guidance and balance. Nevertheless, the amount of the spring elements  114  can be 2 or other amount in consideration of special limitation or the size of the pin. 
         [0050]    The present invention further provides a seventh preferred embodiment of the present invention, which is a socket comprising an isolating housing and a plurality of female terminals regularly arranged therein, wherein the female terminals are accommodated in the isolating housing. Each said female terminal  100  primarily comprises an attachment portion  102 , a contact portion  104 , a neck  106 , an outer barrel  108 , and an inner tube  110  and possesses the characters as disclosed in the first through sixth preferred embodiments. 
         [0051]    The present further provides an eighth preferred embodiment of the present invention, which is a socket comprising an isolating housing and a plurality of female terminals regularly arranged therein, wherein the female terminals are accommodated in the isolating housing. Each said female terminal  100  primarily comprises an attachment portion  102 , a contact portion  104 , a neck  106 , an outer barrel  108 , and an inner tube  110  and possesses the characters as disclosed in the first through sixth preferred embodiments. 
         [0052]    The present further provides a ninth preferred embodiment of the present invention, which is a socket comprising an isolating housing and a plurality of female terminals regularly arranged therein, wherein the female terminals are accommodated in the isolating housing. Each said female terminal  100  primarily comprises an attachment portion  102 , a contact portion  104 , a neck  106 , an outer barrel  108 , and an inner tube  110  and possesses the characters as disclosed in the first through sixth preferred embodiments. 
         [0053]    The present further provides a tenth preferred embodiment of the present invention, which is a socket comprising an isolating housing and a plurality of female terminals regularly arranged therein, wherein the female terminals are accommodated in the isolating housing. Each said female terminal  100  primarily comprises an attachment portion  102 , a contact portion  104 , a neck  106 , an outer barrel  108 , and an inner tube  110  and possesses the characters as disclosed in the first through sixth preferred embodiments. 
         [0054]    The present further provides an eleventh preferred embodiment of the present invention, which is a socket comprising an isolating housing and a plurality of female terminals regularly arranged therein, wherein the female terminals are accommodated in the isolating housing. Each said female terminal  100  primarily comprises an attachment portion  102 , a contact portion  104 , a neck  106 , an outer barrel  108 , and an inner tube  110  and possesses the characters as disclosed in the first through sixth preferred embodiments. 
         [0055]    The present further provides a twelfth preferred embodiment of the present invention, which is a socket comprising an isolating housing and a plurality of female terminals regularly arranged therein, wherein the female terminals are accommodated in the isolating housing. Each said female terminal  100  primarily comprises an attachment portion  102 , a contact portion  104 , a neck  106 , an outer barrel  108 , and an inner tube  110  and possesses the characters as disclosed in the first through sixth preferred embodiments. 
         [0056]    Although foresaid embodiments of the invention has been described in detail for purposes of illustration, it will be understood by one of ordinary skill in the art that numerous variations will be possible to the disclosed embodiments without going outside the scope of the invention as disclosed in the claims.