Abstract:
A high frequency connector is used for connecting with a high frequency transmission cable as to offer a function of transmitting signal of an electric appliance. The high frequency connector includes an insulation body with multiple terminal therein, a metal inner covering disposed at outer side of the insulation body and a jacket disposed at the outermost side of the connector. The terminals are electrically connected to the cable and the inner cover at an end thereof has a locating device for holding the cable. The locating device is provided with an engaging device so as to retain and hold the cable at a preset position without loosening and swaying such that both high frequency characteristics and integral strength of the connector can be enhanced.

Description:
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to a high frequency connector and particularly to a high frequency connector used with electrical equipment. 
     2. Description of Related Art 
     Due to the core technology for operation and processing in a computer system upgrading incessantly, the net information service being incessantly promoted and data density growing multiply, it not only brings internal revolution of the computer but also makes the transmission frequency width and storage capacity of the computer peripheries rising suddenly. 
     For the data storage equipment, it plays an important role in a structure of computer system for saving programs, files and various data. Owing to the internal transmission speed and the information storage capacity being enhanced, the external interface transmission specification of the data storage equipment has to be upgraded such that it is capable of providing the hard disk enough frequency width for completing effective input and output. 
     In order to meet the required frequency width, the data storage equipment has progressed the interface specification such as Ultra ATA, Ultra ATAS/66, Ultra ATA/100 or Ultra ATA/133, in recent years. Currently, the Serial ATA has be regulated as a cable standard for a highest transmission frequency width and problems faced with the production technique are getting more if the frequency width of the cable line is getting higher. 
     The serial ATA has been developed with a set of serial transmission pair as a signal transmission passage instead of the traditional design of parallel wiring. Presently, the connector mainly has an insulation body with multiple terminals therein for electrically connecting with the cable and the insulation body at the outer side thereof is a jacket, which is made of plastics with injection molding directly. However, problems, which have to be solved, resided in the preceding fabrication way are listed hereinafter: 
     1) The cable is unable to be fixed easily: Because the high frequency transmission cable is pretty sensitive to the range difference of signal between the serial transmission pairs such that it may result in mistakes during signal transmission in case of the cable line having any turn or bent. Especially, the cable at the position for joining the connector is frequently incapable of meeting the standard frequency width due to internal lines of the cable misaligning caused by the factor of fabrication work. 
     2) It is interfered by the magnetic field easily: Although the current used high frequency transmission cable is provided with a ground line therein, there is no any electromagnetic screening device available at the outer side of the connector so that the joint of the connector may be interfered by the external electromagnetic field and generate noisy signal to reduce the quality of transmission. 
     3) Insufficient holding force is provided: At the present time, the connector is provided with terminals extending outward such that the terminals and an oppositely joined connector interfere with each other to form a major holding force. However, the preceding holding structure is incapable of complying with the contact situation of inserting and taking out frequently and it is quite easy to become insufficient holding force due to elastic fatigue of the terminals. In this way, a serious consequence such as signal breaking out will occur because of connector loosening. 
     4) The engaging device is lack of firmness: The conventional connector at the joining surface thereof is made of plastics and the plastics provides low hardness so that the conventional connector can keep firm only in case of the connector being inserted to engage with the opposite joining connector and being taken out to disengage from the opposite joining connector less frequently. If the connector is used under the condition of being inserted and taken out frequently, the part made of plastics may fracture and the connector becomes useless. 
     SUMMARY OF THE INVENTION 
     A primary object of the present invention is to provide a high frequency connector, which can locate the cable firmly, so as to avoid the cable being bent and misaligned during the connector being made and enhance the high frequency characteristics of the connector. 
     Another object of the present invention is to provide a high frequency connector, with which the electromagnetic interference can be screened out, the engaging device can be intensified and the joining force thereof can be increase, so that the integral strength thereof and the effect for protecting from the electromagnetic can be enhanced substantially. 
     Accordingly, the high frequency connector according the present invention includes an insulation body providing multiple terminals connected to the cable, a metal inner covering disposed at the outer side of the insulation body with an end thereof extending a locating device for holding the cable and the locating device having an engaging device for fastening the cable, and a jacket extending from the connecting section of the insulation body to cover the insulation body, the metal inner covering and part of the cable. Hence, the cable can keep at a preset position due to the locating device of the inner covering and can avoid loosening and swaying due to the engaging device in the locating device such that the integral strength of the high frequency connector can be enhanced. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The present invention can be more fully understood by reference to the following description and accompanying drawings, in which: 
         FIG. 1  is a perspective view of a high frequency connector according to the present invention; 
         FIG. 2  is an exploded perspective view of the high frequency connector shown in  FIG. 1 ; 
         FIG. 3  is a perspective view of a locating device for a covering body in the high frequency connector according to the present invention in a state of engagement; 
         FIG. 4  is a perspective view illustrating the connector in the first state of use; and 
         FIG. 5  is a perspective view illustrating the connector in the second state of use. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
     Referring to  FIGS. 1 and 2 , a high frequency connector according to the present invention is connected to a high frequency transmission cable  70  to transmit electrical signals and the high frequency connector includes an insulation body  10  with multiple terminals  60 , an inner metal covering  20  disposed at the outer side of the insulation body  10  and a jacket  40  disposed at the outermost part of the connector. The terminals  60  in the insulation body  10  electrically connects with the cable  70  and the inner covering  20  at an end thereof has a locating device  30  for holding the cable  70  as shown in FIG.  3 . The locating device  30  has an engaging device  32  for securing the cable  70  and the locating device  30  with the inner covering  20  thereof can keep the cable  70  at a preset position and prevent the cable  70  from loosening and swaying. Thus, the cable with bent and misaligning resulting from the connector being fabricated can be avoided so that it is capable of intensifying the high frequency characteristics of the connector and strengthening the connector. 
     The insulation body  10  primary has a receiving groove  12  for accommodate the terminals  60  and allowing the terminals  60  passing through the insulation body  10  and has at least an abrupt block  11  on the surface thereof. The insulation body  10  extends a reduced joint  14  and the reduced joint  14  divides the insulation body  10  into a wiring section  15  and an inserted section  16 . The receiving groove  12  corresponding to the inserted section  16  forms an inserted opening  13  and the inserted section  16  at a lateral side thereof has a foolproof post  17 . Thus, the inserted section  16  and the inserted opening  13  constitutes a structure corresponding to an opposite joining connector  80  and it is possible to distinguish the inserted direction of the opposite joining connector  80  by way of the foolproof post  17  to avoid a careless insertion done by the user. 
     The covering  20  is composed of a set of metal thin plates and includes two metal shells  21 ,  21 ′ and the locating device  30  is extended from one of the metal shells  21 ,  21 ′ corresponding to an end of the wiring section  15  on the insulation body. The metal shells  21 ,  21 ′ at both lateral sides thereof have a lateral wall  22  respectively corresponding to the wiring section  15  of the insulation body  10  with lock holes  23  provided at the lateral walls  22  of the metal shell  21  corresponding to lock tabs  24  provided at the lateral walls  22  of the metal shell  21 ′ such that the metal shells  21 ,  21 ′ can be engaged to each other. Further, the metal shells  21 ,  21 ′ have a piercing hole  25  corresponding to the abrupt block  11  and each of the metal shells  21 ,  21 ′ provides at least a fitting hole  26  to fit with the connector  80  in a way of interfering with each other and provides at least a ground plate  27  for contacting with a ground device of the connector  80 . Hence, the tightness between the high frequency connector and the connector  80  can be enhanced with the aid of the interfering fitting hole  26  and the effect of electromagnetic protection of the entire connector can be enhanced by way of the ground plate  27 . 
     Besides, the locating device  30  includes two holding wings  31 ,  31 ′ for enclosing the circumferential surface of the cable  70  and the engaging device  32  is disposed at the free end of each of the holding wings  31 ,  31 ′ with one of the free ends having a lock hole  33  and the other free end having a lock piece  34  so that the lock hole  33  can engage with the lock piece  34  to define the position of the cable  70  with respect to the covering  20  so as to facilitate subsequent assembling operations and secure the cable  70  from being bent and misaligned. 
     The jacket  40  extends from the reduced joint  14  of the insulation body  10  toward the cable  70  and covers the insulation body  10 , the inner covering  20  and part of the cable  70 . The jacket  40  includes two outer casing halves  41 ,  41 ′ with one of the inner sides thereof having an engaging blind hole  43  and the other one of the inner sides thereof having an engaging post  44  so that the two outer casing halves  41 ,  41 ′ can be attached to each other oppositely. Further, the outer casing halves  41 ,  41 ′ at the inner sides thereof have a locating recess  42  respectively for receiving the abrupt block  11  of the insulation body  10  so that the abrupt block  11  can pass through the piercing hole  25  and enter the locating recess  42  to restrain positions of the insulation body  10 , the inner covering  20  and the jacket  40  relatively. 
     Firstly, the cable  70  is pulled in a straight state without bending before the connector of the present invention being made. Then, the cable  70  is welded to the terminals  60 . Next, the piercing holes  25  at the metal shells  21 ,  21 ′ are aligned to the abrupt block  11  and to be mounted at two lateral sides of the insulation body  10 . Right at this time, the lock tabs  24  on the lateral wall  22  of the metal shell  21  fall into the lock holes  23  so that the two metal shells  21 ,  21 ′ can cover the insulation body  10 . Afterward, referring to  FIGS. 2 and 3 , the holding wings  31 ,  31 ′ of the locating device  30  on the metal shells  21 ,  21 ′ are bent along the circular surface of the cable  70  so as to join the engaging device  32  provided at the ends of the holding wings  31 ,  31 ′ such that the lock piece  34  can fall into the retaining hole  33  to define the position of the cable  70  relative to the inner covering  20  to facilitate the subsequent operations for assembling the connector of the present invention and secure the cable  70  from bending and misaligning so as to maintain the high frequency characteristics thereof. Finally, the jacket  40  is made with the locating recesses  42  at the inner sides thereof aligning with the abrupt block  11  and the engaging hole  43  aligns with the engaging post at two lateral sides of the inner sides respectively. Because the locating recess  42  corresponds to the abrupt block  11 , the outer casing halves  41 ,  41 ′ extend from the reduced joint  14  just rightly to cover the insulation body  10 , the inner covering  20  and part of the cable  70 . The two outer casing halves  41 ,  41 ′ are treated with high frequency seaming after having reached the preset position so that the outer casing halves  41 ,  41 ′ can join with each other as an integral piece and the high frequency connector can be obtained. 
     Wherein, the jacket  40  is made with injection molding directly after the step of enclosing with the metal shells  21 ,  21 ′. The jacket  40  at the end section thereof is provided with a locating sleeve  50  as shown in  FIG. 1  can absorb the bending force of the cable  70  and the locating sleeve  50  is formed with injection molding. 
     Referring to  FIGS. 4 and 5 , while the high frequency connector of the present invention is in use, the opposite joining connector  80  at the outer side thereof has a shield shell  81  and the high frequency connector of the present invention is connected to the connector  80  by way of the inserted section  16  o the insulation body  10  with the interfering fitting hole  26  at the metal shell  21  engaging with the connector  80  during swapping so as to intensify the inserting or detaching force. In addition, the ground plate  27  on the metal shell  21  can contact with the shield  81  of the connector  80  to obtain the effect of integral electromagnetic protection. 
     It is appreciated that the high frequency connector according to the present invention can locate the cable  70  firmly by way of locating device to prevent the cable  70  from bending and misaligning so as to enhance the high frequency characteristics of the present invention and constitute a screen of electromagnetic interference. Furthermore, the joining structure of the connector can be intensified to enhance the engaging force so that the integral strength of the connector can be enhanced and the effect of electromagnetic protection can be promoted substantially. 
     While the invention has been described with reference to a preferred embodiment thereof, it is to be understood that modifications or variations may be easily made without departing from the spirit of the invention, which is defined in the appended claims.