Abstract:
The invention discloses a connector, a connector, a matched connector, a matched connector and a connecting assembly. The connecting assembly includes the connector and the matched connector. A terminal fixing portion of the connector is provided with terminal accommodating cavities for accommodating connecting terminals. Separators for separating adjacent connecting terminals are disposed as protruding between the terminal accommodating cavities. The matched connector comprises insertion holes and isolating slots provided on a female end seat. The separators are inserted into the isolating slots. One end of the connecting terminal is disposed on the body of the connector, and the other end is held within the insertion hole and is connectable with a terminal connecting piece of the matched connector. The invention prevents connecting terminals from interfering with each other to provide a higher secure connection performance, while maintaining smaller spacing therebetween.

Description:
CLAIM OF PRIORITY 
       [0001]    The present application claims priority from Chinese Patent Application Number 201610186446.7 filed Mar. 29, 2016, the subject matter of which is incorporated herein by reference. 
       TECHNICAL FILED 
       [0002]    The present invention relates generally to an electrical connection structure, and particularly relates to a connector, a matched connector and a connecting assembly. 
       BACKGROUND 
       [0003]    Connecting pieces are generally used for connecting in the existing technology in order to achieve stable electrical connection between different electronic devices, wires or connecting terminals. With the development of integration and large scale of electronic devices, a plurality of electronic devices, wires or connecting terminals often need to be simultaneously connected. Particularly, when a plurality of connecting terminals are connected, interference such as point discharge is easily produced between the connecting terminals spaced in a short distance, thus causing potential safety hazards. 
       SUMMARY OF THE INVENTION 
       [0004]    One of the objects of the present invention is to overcome the shortcomings in the prior art. Thus a connecting piece, a connector, a matched connecting piece, a matched connector and a connecting assembly which are compact in structure, safe and stable are provided in the present invention. 
         [0005]    The present invention achieves the above object by the following technical solutions. 
         [0006]    The present invention provides a connecting piece. The connecting piece includes a body including a terminal fixing portion which is provided with a plurality of terminal accommodating cavities in a penetrating mode and separators arranged on the body and positioned between the adjacent terminal accommodating cavities. The separators extend reversely in the extension direction of the terminal accommodating cavities to separate the connecting terminals on the two sides of each separator. 
         [0007]    Preferably, the body includes enclosure walls which continuously extend from the terminal fixing portion in the axial direction of the terminal accommodating cavities, and the separators are spaced from the enclosure walls. 
         [0008]    Preferably, the body is provided with enclosure walls which continuously extend from the terminal fixing portion in the axial direction of the connecting piece, and the lengths of the enclosure walls extending along the extension directions of the terminal accommodating cavities are greater than the extension lengths of the separators. 
         [0009]    Preferably, each enclosure wall is provided with a buckle matching portion used for buckling and matching a buckle on an external housing. 
         [0010]    Preferably, the terminal accommodating cavities are arranged in two rows, each row of which includes a plurality of terminal accommodating cavities, and the separators are arranged between all the adjacent terminal accommodating cavities. 
         [0011]    Preferably, the separators include a transverse separator and longitudinal separators, and the transverse separator is arranged between one row of terminal accommodating cavities and the other row of terminal accommodating cavities and the longitudinal separators are arranged on two sides of each terminal accommodating cavity in each row. 
         [0012]    Preferably, all the longitudinal separators are connected with the transverse separator. 
         [0013]    Preferably, the separators are integrated pieces. 
         [0014]    Preferably, the connecting piece is an integrated injection molding piece. 
         [0015]    Preferably, the terminal accommodating cavities include first accommodating cavities for accommodating low-voltage connecting terminals and second accommodating cavities for accommodating high-voltage connecting terminals. 
         [0016]    Preferably, the first accommodating cavities and the second accommodating cavities have the same dimension, shape and structure. 
         [0017]    Preferably, the separator is arranged between at least two adjacent second accommodating cavities. 
         [0018]    Preferably, the separators are merely arranged between all the adjacent second accommodating cavities. 
         [0019]    The present invention further provides a connector. The connector includes connecting terminals and the aforesaid connecting piece, and the connecting terminals are accommodated in the terminal accommodating cavities. 
         [0020]    Preferably, at least part of the connecting terminals extend out of the terminal accommodating cavities from the front end of the terminal fixing portion, and the lengths of the connecting terminals extending out of the terminal accommodating cavities are smaller than the extension lengths of the adjacent separators. 
         [0021]    Preferably, the body is provided with enclosure walls which continuously extend in the axial direction of the terminal accommodating cavities from the front end of the terminal fixing portion, and the extension lengths of the enclosure walls are greater than the lengths of the connecting terminals extending out of the terminal accommodating cavities. 
         [0022]    Preferably, the connector further includes first secondary locks provided on the body, and each first secondary lock is provided with a blocking portion which is in blocking fit with the connecting terminal. 
         [0023]    Preferably, each connecting terminal is provided with a terminal body and an insertion end is arranged on the terminal body. The terminal body has a radial dimension greater than that of the insertion end and is provided with a front end portion and a rear end portion in the insertion direction of the connecting terminal. The front end portion of the terminal body is in blocking fit with the blocking portion. 
         [0024]    Preferably, a first barb is provided in each terminal accommodating cavity, and the first barbs are in blocking fit with the rear end portions of the terminal bodies. 
         [0025]    Preferably, the connecting terminals are in interference fit with the walls of the corresponding terminal accommodating cavities. 
         [0026]    Preferably, the connecting terminals and the body are formed as an integrated piece. 
         [0027]    Preferably, two ends of the connecting terminals extend out of the terminal accommodating cavity respectively. 
         [0028]    Preferably, the connector further includes a circuit board, and one end of each connecting terminal is connected to a matched terminal of a matched connector and the other end is connected to the circuit board. 
         [0029]    Preferably, the connecting terminals include low-voltage connecting terminals and high-voltage connecting terminals. 
         [0030]    Preferably, the low-voltage connecting terminals and the high-voltage connecting terminals have the same dimension, shape and structure. 
         [0031]    Preferably, the terminal accommodating cavities include first accommodating cavities and second accommodating cavities, and the low-voltage connecting terminals are accommodated in the first accommodating cavities and the high-voltage connecting terminals are accommodated in the second accommodating cavities. 
         [0032]    The present invention further provides a matched connecting piece. The matched connecting piece includes a female end seat which is provided with insertion holes and isolating slots. The insertion holes are formed in the axial direction of the female end seat in a penetrating mode and are used for accommodating the connecting terminals on the matched connecting piece. The isolating slots are arranged between the insertion holes to accommodate the separators on the matched connecting piece. 
         [0033]    Preferably, the isolating slots are arranged in two rows and each row includes a plurality of isolating slots. The insertion holes are arranged between all the adjacent isolating slots. 
         [0034]    Preferably, all the isolating slots are configured to be in communication with each other. 
         [0035]    Preferably, the matched connecting piece is an injection molding piece. 
         [0036]    Preferably, each insertion hole is provided with a front opening and a rear opening in the axial direction thereof. The wall of the insertion hole at the front end thereof is provided with an installation gap which is in communication with the front opening. The front opening is used for accommodating a connecting terminal on the matched connector. 
         [0037]    The present invention further provides a matched connector. The matched connector includes the matched connecting piece and terminal connecting pieces as described in claims. The terminal connecting pieces are inserted into the insertion holes. 
         [0038]    Preferably, the matched connector further includes second secondary locks and each second secondary lock is provided with a stop portion. Each terminal connecting piece is provided with a stopping front portion. The stop portion is at least partially in blocking fit with the stopping front portion of the terminal connecting piece. 
         [0039]    Preferably, each insertion hole is provided with a front opening and a rear opening in the axial direction thereof. The wall of the insertion hole at the front end thereof is provided with an installation gap which is in communication with the front opening. The front opening is used for accommodating a connecting terminal on the matched connector. The terminal connecting piece is inserted from the rear opening, and the stop portion is accommodated in the installation gap. 
         [0040]    Preferably, a second barb is provided in each insertion hole, and each terminal connecting piece is provided with a blocking matching portion protruding along the terminal connecting piece. The second barb is in blocking fit with the blocking matching portion of the terminal connecting piece. 
         [0041]    The present invention further provides a connecting assembly. The connecting assembly includes the aforesaid connecting piece and the matched connecting piece as described in claims. The separators are accommodated in the isolating slots. 
         [0042]    Preferably, the connecting assembly further includes connecting terminals. One end of each connecting terminal is arranged on the body and the other end is inserted into the insertion hole. 
         [0043]    Preferably, the connecting assembly further includes a circuit board, and one end of each connecting terminal is connected to the circuit board. 
         [0044]    Preferably, the connecting assembly further includes terminal connecting pieces, and each terminal connecting piece is accommodated in the insertion hole and connected with the other end of the connecting terminal. 
         [0045]    Compared with the prior art, the connecting pieces of the present invention are provided with separators disposed on the bodies so that the connecting terminals inserted into the terminal accommodating cavities on the bodies are separated, which improves the safe connection performance, enables all the connecting terminals to keep smaller spacing on the premise of no mutual interference, and enables the connecting pieces to be compact in overall structure and the installation space to be saved. 
         [0046]    Preferably, by means of matching between the transverse separators and the longitudinal separators, the separators of the connecting pieces not only improve the safety performance of the connecting pieces including a plurality of connecting terminals, but also provide larger accommodating space for installing the connecting terminals with different specifications. The connecting pieces achieve a quick and convenient insertion, provide different connection manners, and can be matched with the matched connecting pieces to meet different connection requirements. 
     
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         [0047]      FIG. 1  is a structural schematic diagram I of one embodiment of a connecting piece provided by the present invention. 
           [0048]      FIG. 2  is a structural schematic diagram II of the connecting piece in  FIG. 1 . 
           [0049]      FIG. 3  is a structural schematic diagram I of a connector provided by the present invention. 
           [0050]      FIG. 4  is a structural schematic diagram II of the connector in  FIG. 3 . 
           [0051]      FIG. 5  is a section view of the connector in  FIG. 3  along the line C-C. 
           [0052]      FIG. 6  is a structural schematic diagram of a high-voltage connecting terminal of the connector in  FIG. 3 . 
           [0053]      FIG. 7  is a structural schematic diagram of another embodiment of a connecting piece provided by the present invention. 
           [0054]      FIG. 8  is a structural schematic diagram of a connector of the connecting piece shown in  FIG. 7  provided by the present invention. 
           [0055]      FIG. 9  is a structural schematic diagram I of a matched connecting piece provided by the present invention. 
           [0056]      FIG. 10  is a structural schematic diagram II of the matched connecting piece in  FIG. 9 . 
           [0057]      FIG. 11  is a structural schematic diagram of a matched connector provided by the present invention. 
           [0058]      FIG. 12  is a structural schematic diagram I of the matched connector in  FIG. 11  provided with second secondary locks. 
           [0059]      FIG. 13  is a structural schematic diagram II of the matched connector in  FIG. 12 . 
           [0060]      FIG. 14  is a perspective exploded view of the matched connector in  FIG. 12 . 
           [0061]      FIG. 15  is a structural schematic diagram of a terminal connecting piece of the matched connector in  FIG. 11 . 
           [0062]      FIG. 16  is a structural schematic diagram of a connecting assembly provided by the present invention. 
           [0063]      FIG. 17  is a perspective exploded view of the connecting assembly in  FIG. 16  at one viewing angle. 
           [0064]      FIG. 18  is a perspective exploded view of the connecting assembly in  FIG. 17  at another viewing angle. 
           [0065]      FIG. 19  is a section view of the connecting assembly in  FIG. 16  along the line D-D. 
           [0066]      FIG. 20  is a section view of the connecting assembly in  FIG. 16  along the line E-E. 
       
    
    
     DETAILED DESCRIPTION OF EMBODIMENTS 
       [0067]    The present invention will be described in detail below in combination with the accompanying drawings. 
       Embodiment I 
       [0068]    Please refer to  FIG. 1  and  FIG. 2 , which show a connecting piece  101  provided by the present invention. The connecting piece  101  includes a body  10  and separators  20 . 
         [0069]    The body  10  may be an integrated piece made of an insulating material, e.g. an injection molding piece. The shape, dimension and specification of the body  10  are selectable according to the installation requirement and a matched connecting terminal. In this embodiment, the body  10  is generally of a cuboid shape. The body  10  includes a terminal fixing portion  19 . The terminal fixing portion  19  is provided with a plurality of terminal accommodating cavities ( 11 ,  12 ) in a penetrating mode. The plurality of terminal accommodating cavities ( 11 ,  12 ) are used for accommodating connecting terminals ( 40 ,  50 ) as described below. The terminal fixing portion  19  may be configured to be plate-like. The body  10  is provided with side walls  14 . The side walls  14  are arranged around the terminal fixing portion  19 . 
         [0070]    In this embodiment, the terminal accommodating cavities include first accommodating cavities  11  and second accommodating cavities  12 . The first accommodating cavity  11  is used for accommodating a low-voltage connecting terminal  40  as described below. The second accommodating cavity  12  is used for accommodating a high-voltage connecting terminal  50  as described below. The first accommodating cavities  11  and the second accommodating cavities  12  are both formed in a penetrating mode, and also can be interpreted as through holes or tubular cavities, so that two ends can be connected via the corresponding low-voltage connecting terminals  40  and high-voltage connecting terminals  50 . The shape and dimension of the first accommodating cavity  11  can be available as long as they meet the requirement for accommodating the low-voltage connecting terminal  40 . In this embodiment, the walls of the first accommodating cavity  11  at least partially abut against the low-voltage connecting terminals  40 . The shape and dimension of the second accommodating cavity  12  can be available as long as they meet the requirement for accommodating the high-voltage connecting terminal  50 . In this embodiment, the walls of the second accommodating cavity  12  at least partially abut against the high-voltage connecting terminal  50 . The shapes, dimensions and structures of the first accommodating cavity  11  may be the same or different as those of the second accommodating cavity  12  on the premise that the requirements for accommodating the corresponding low-voltage connecting terminal  40  and high-voltage connecting terminal  50  are met. 
         [0071]    It should be appreciated that, in this embodiment, the shape, dimension and structure of the first accommodating cavity  11  are the same as those of the second accommodating cavity  12 , that is, the mechanical structure of the first accommodating cavity  11  is the same as that of the second accommodating cavity  12 . But to distinguish the different effects that the first accommodating cavity  11  and the second accommodating cavity  12  have when they are respectively in installation fit with the low-voltage connecting terminal  40  and the high-voltage connecting terminal  50  to accordingly connect a low-voltage line and a high-voltage line, different names are used to indicate them. 
         [0072]    The quantities of the first accommodating cavities  11  and the second accommodating cavities  12  are selectable according to the connection requirement and the quantities of the corresponding low-voltage connecting terminals  40  and high-voltage connecting terminals  50 . In this embodiment, the quantity of the first accommodating cavities  11  is four. The quantity of the second accommodating cavities  12  is eighteen. The relative arrangement relationship of the first accommodating cavities  11  and the second accommodating cavities  12  can be selected according to the installation space and the connection requirement. In this embodiment, the first accommodating cavities  11  and the second accommodating cavities  12  are divided into two rows. Each row includes two first accommodating cavities  11  and nine second accommodating cavities  12 . The first accommodating cavities  11  and the second accommodating cavities  12  in one row are exactly opposite to those in the other row in a one-to-one correspondence mode. That is, the two rows of first accommodating cavities  11  and second accommodating cavities  12  are parallel and exactly opposite. 
         [0073]    In order to achieve better protective performance, in this embodiment, the body  10  is provided with enclosure walls  15 . The enclosure walls  15  enclose all of the first accommodating cavities  11  and the second accommodating cavities  12 . The enclosure walls  15  are configured to be spaced from the separators  20 , so that the matched connecting piece has a larger installation space or has a larger space for matching with other structures. The enclosure walls  15  have greater extension lengths in the axial direction of the second accommodating cavities  12  than those of the separators  20 , that is, the protruding heights of the enclosure walls  15  relative to the transverse planes of the openings of the second accommodating cavities  12  are greater than the protruding heights of the separators  20  relative to the transverse planes of the openings of the second accommodating cavities  12 . The enclosure walls  15  are arranged around all of the first accommodating cavities  11  and the second accommodating cavities  12 . The enclosure walls  15  are connected with the side walls  14  to form an accommodating cavity (not shown in the figures) matched with a matched connecting piece. The inner side walls of the enclosure walls  15  may be in contact with the matched connecting piece to form installation fit. 
         [0074]    In order to facilitate close fit with a female end connecting structure, in this embodiment, each enclosure wall  15  is provided with a buckle matching portion  13  in a protruding mode, and the buckle matching portions  13  are used for buckling and matching buckles on a matched housing. The buckle matching portions  13  may be of installation matching structures such as clamping grooves, through holes and the like. 
         [0075]    The separators  20  are arranged on the body  10  and positioned between the adjacent terminal accommodating cavities ( 11 ,  12 ). The separators  20  extend reversely in the extension direction of the terminal accommodating cavities ( 11 ,  12 ) to separate the connecting terminals ( 40 ,  50 ) at the two sides of the separators  20 . The separators  20  may prevent the charged low-voltage connecting terminals  40  and high-voltage connecting terminals  50  from breaking down air. The breakdown air may lead to one high-voltage connecting terminal  50  is electrically conducted with another high-voltage connecting terminal  50  and one high-voltage connecting terminal  50  is electrically conducted with one low-voltage connecting terminal  40 . Particularly, the insertion ends of the low-voltage connecting terminals  40  and the high-voltage connecting terminals  50  are generally sharp, thus causing point discharge, which can be avoided by using the separators  20 . The separators  20  may be made of a material meeting the requirement for blocking point discharge, e.g. rubber and boards. In this embodiment, the separators  20  are made of plastic, that is, the separator  20  has a plastic structure. The shape and the dimension of the separators  20  can be acceptable as long as they meet the requirement for blocking point discharge. The separators  20  may be lugs or bosses. In this embodiment, the separators  20  are flat in order to reduce the occupied space as much as possible. The extension lengths of the separators  20  are greater than or equal to the lengths of the corresponding high-voltage connecting terminals  50  protruding out of the second accommodating cavities  12 , thus avoiding point discharge that may be generated by high-voltage connecting terminals  50 . The separators  20  are arranged on the body  10  and positioned between at least two second accommodating cavities  12 . The separators  20  extend in the axial direction of the second accommodating cavities  12 , so as to prevent the high-voltage connecting terminals at the two sides of the separators  20  from breaking down air. 
         [0076]    It could be contemplated that, the probability of the air breakdown generated between one high-voltage conductor and one low-voltage conductor is smaller than that between one high-voltage conductor and another high-voltage conductor on the premise of equal spacing. Thus, the separators  20  may be merely arranged between all the adjacent second accommodating cavities  12 . In this embodiment, in order to avoid the problem that the high-voltage connecting terminals  50  and the low-voltage connecting terminals  40  are electrically conducted due to the air breakdown generated therebetween, a plurality of separators  20  are provided and a part of the separators  20  are arranged between the first accommodating cavities  11  and the second accommodating cavities  12 . 
         [0077]    As mentioned above, in this embodiment, the second accommodating cavities  12  are arranged in two rows. Each row includes a plurality of second accommodating cavities  12 . The separators  20  are arranged between the adjacent second accommodating cavities  12 . In this embodiment, the separators  20  include a transverse separator  21  and longitudinal separators  22 . The transverse separator  21  is arranged between one row of second accommodating cavities  12  and the other row of second accommodating cavities  12 . The longitudinal separators  22  are arranged at two sides of each second accommodating cavity  12  in each row. The above implementation manner of the separators  20  enables three sides of each second accommodating cavity  12  to be enclosed, so that not only can the safety performance of preventing the point discharge of the high-voltage connecting terminals  50  be obtained, but also devices or conductors connected and matched with the high-voltage connecting terminals  50  accommodated in the second accommodating cavities  12  have a larger installation space because the fourth side of each second accommodating cavities  12  is open (i.e., in an elongated shape of straight slot). 
         [0078]    In order to obtain better shielding performance to better prevent point discharge, the second accommodating cavities  12  are shorter in the spaced distance therebetween and more compact in structures. In this embodiment, all the longitudinal separators  22  are connected with the transverse separator  21 . That is, in this embodiment, the separators  22  are configured to form a plurality of cross grids connected transversely. 
         [0079]    In order to facilitate assembly and improve the stable connection performance, the connecting piece  101  is an integrated piece in this embodiment. In order to reduce the manufacturing cost on the premise of better preventing point discharge, the connecting piece  101  is an injection molding piece in this embodiment. 
       Embodiment II 
       [0080]    Please refer to  FIG. 3  to  FIG. 6 , which show structural schematic diagrams of a connector  102  provided by the present invention. The connector  102  includes the connecting piece  101  of embodiment I and connecting terminals ( 40 ,  50 ). 
         [0081]    In this embodiment, the connecting terminals include low-voltage connecting terminals  40  and high-voltage connecting terminals  50 . In order to achieve a better blocking effect to improve the protective performance on the premise of facilitating realization of corresponding connection functions, the connecting terminals ( 40 ,  50 ) extend out of the terminal accommodating cavities ( 11 ,  12 ) from the front end of the terminal fixing portion  19 , and the lengths of the connecting terminals ( 40 ,  50 ) extending out of the terminal accommodating cavities ( 11 ,  12 ) are smaller than the extension lengths of the adjacent separators  20 . 
         [0082]    The low-voltage connecting terminals  40  are accommodated in the first accommodating cavities  11 . The high-voltage connecting terminals  50  are accommodated in the second accommodating cavities  12 . In this embodiment, the low-voltage connecting terminals  40  extend in the insertion direction thereof to extend out of the first accommodating cavities  11 , and the lengths of the low-voltage connecting terminals  40  extending out of the first accommodating cavities  11  are smaller than or equal to the extension lengths of the separators  20 . Of course, the low-voltage connecting terminals  40  may be accommodated in the first accommodating cavities  11  but do not extend out of the first accommodating cavities  11 . At the moment, electronic devices or wires matched with the low-voltage connecting terminals  40  may enter the first accommodating cavities  11  by extending, so as to realize connection of low-voltage lines with the low-voltage connecting terminals  40 . Accordingly, the separators  20  can also prevent the low-voltage connecting terminals  40 , the electronic devices or the wires from discharging. 
         [0083]    The high-voltage connecting terminals  50  extend in the insertion direction thereof to extends out of the second accommodating cavities  12 , and the lengths of the high-voltage connecting terminals  50  extending out of the second accommodating cavities  12  are smaller than or equal to the extension lengths of the separators  20 . Of course, the high-voltage connecting terminals  50  may be accommodated in the second accommodating cavities  12  but do not extend out of the second accommodating cavities  12 . At the moment, electronic devices or wires matched with the high-voltage connecting terminals  50  may enter the second accommodating cavities  12  by extending, so as to realize connection of high-voltage lines with the high-voltage connecting terminals  50 . Accordingly, the separators  20  can also prevent the high-voltage connecting terminals  50 , the electronic devices or the wires from discharging. 
         [0084]    According to the corresponding connection requirements, the low-voltage connecting terminals  40  and the high-voltage connecting terminals  50  may adopt the same structure or different structures. In order to reduce the manufacturing cost and improve the installation efficiency, the low-voltage connecting terminals  40  and the high-voltage connecting terminals  50  have the same structure, dimension and shape in this embodiment. It should be noted that, the connecting terminals are named for distinguishing the different effects that the low-voltage connecting terminals  40  are connected to low-voltage lines while the high-voltage connecting terminals  50  are connected to high-voltage lines. In this embodiment, each high-voltage connecting terminal  50  includes a high-voltage body  51  and a high-voltage insertion end  52 . The high-voltage body  51  has a radial dimension or cross section area greater than that of the high-voltage insertion end  52 . The high-voltage bodies  51  are accommodated in the second accommodating cavities  12 . The high-voltage insertion ends  52  extend out of the second accommodating cavities  12 . The high-voltage bodies  51  can be in blocking fit with blocking portions  62  of the first secondary locks  60  as will be described below, so as to prevent the high-voltage connecting terminals  50  from moving. 
         [0085]    In order to be stably arranged in the first accommodating cavity  11 , each low-voltage terminal body  41  is provided with a low-voltage front end portion  411  and a low-voltage rear end portion  412  in the insertion direction of the low-voltage connecting terminal  40 . The low-voltage front end portion  411  of the low-voltage terminal body  41  is matched with the blocking portion  62  in a blocking manner. In order to be stably arranged in the second accommodating cavity  12 , each high-voltage terminal body  51  is provided with a high-voltage front end portion  511  and a high-voltage rear end portion  512  in the insertion direction of the high-voltage connecting terminal  50 . The high-voltage front end portion  511  of the high-voltage terminal body  51  is matched with a blocking portion  62  in a blocking manner. 
         [0086]    In order to further stably arrange each low-voltage connecting terminal in a first accommodating cavity  11 , the first accommodating cavity  11  is provided with a first barb  18 . The first barb  18  is in blocking fit with the low-voltage rear end portion  412  of the low-voltage terminal body  41 . In order to further stably arrange each high-voltage connecting terminal in a second accommodating cavity  12 , the second accommodating cavity  12  is provided with a first barb  18 . The first barb  18  is in blocking fit with the high-voltage rear end portion  512  of the high-voltage terminal body  51 . 
         [0087]    In order to facilitate realizing preassembly of the low-voltage connecting terminals  40  and the high-voltage connecting terminals  50  and improve the stable installation performance of the corresponding low-voltage connecting terminals  40  and high-voltage connecting terminals  50 , the connector  102  further includes first secondary locks  60 . The first secondary locks  60  are preassembled on the body  10  through primary locks and in blocking fit with the high-voltage bodies  51  through final locks, thus limiting positions of the high-voltage connecting terminals  50 . The first secondary locks  60  are provided with blocking portions  62  in one-to-one blocking fit with the high-voltage bodies  51  of the high-voltage connecting terminals  50  and the low-voltage bodies  41  of the low-voltage connecting terminals  40 . The blocking portions  62  may be plate-like. 
       Embodiment III 
       [0088]    Please refer to  FIG. 7 . As a variation of embodiment I, the present invention further provides a connecting piece  103 . Embodiment III mainly differs from embodiment I in that: the supporting structure of the connecting piece  103  is different from that of the connecting piece  101  of embodiment I. The connecting piece  103  includes a body  35 . Both the body  35  and the body  10  of the connecting piece  101  of embodiment I are used for bearing the separators  20 . 
         [0089]    The connecting terminals ( 40 ,  50 ,  71 ,  72 ) are in interference fit with the walls of the terminal accommodating cavities ( 11 ,  12 ). In this embodiment, the low-voltage connecting terminals  40  are in interference fit with the walls of the corresponding low-voltage terminal accommodating cavities  11 . The high-voltage connecting terminals  50  are in interference fit with the walls of the corresponding high-voltage terminal accommodating cavities  12 . 
         [0090]    As another assembly mode, the connecting terminals ( 40 ,  50 ,  71 ,  72 ) and the body  35  are formed as an integrated piece in order to strengthen the stability and improve the assembly efficiency. For example, the connecting terminals ( 40 ,  50 ,  71 ,  72 ) and the body  35  may be formed into an integrated piece made from copper material. Further, two ends of the connecting terminals ( 40 ,  50 ) extend out of the terminal accommodating cavities ( 11 ,  12 ) respectively, so that the two ends of the connecting terminals ( 40 ,  50 ,  71 ,  72 ) can be connected with electronic devices or matched terminals respectively. For example, the two ends of the connecting terminals ( 40 ,  50 ,  71 ,  72 ) can be connected with a circuit board and terminal connecting pieces  88  respectively. 
         [0091]    In order to improve the integration level of circuits for saving energy and improve the universal performance, a circuit board (not shown in the figure) is further included. One end of each of the connecting terminals ( 40 ,  50 ,  71 ,  72 ) is connected to a matched terminal of a matched connector  105 , while the other end is connected to the circuit board. In this embodiment, the matched terminal may be the terminal connecting piece  88  as described below. 
         [0092]    The body  35  includes an installation portion  355 . The installation portion  355  is provided with a plurality of terminal accommodating cavities  351  in a penetrating mode. The terminal accommodating cavities  351  are used for accommodating connecting terminals of the following connector  104  or electronic devices on the circuit board. The terminal accommodating cavities  351  may also be divided into high-voltage terminal accommodating cavities and low-voltage terminal accommodating cavities, and the specific distribution and matching of the terminal accommodating cavities are described in the aforementioned embodiments and will not be redundantly described herein. The shape and the structure of the body  35  only need to meet the requirement for bearing the separators  20 . In this embodiment, in order to achieve better sealing and protective performance, when the separators  20  are inserted into the body  35 , the side wall of the body  35  is in sealing fit with a female end seat  210  as described below. Specifically, the body  35  is provided with an accommodating cavity for accommodating the separators  20 . One end of the accommodating cavity is open, so that the separators  20  can be inserted into the corresponding body  35 . 
         [0093]    The male end connecting piece  102  is provided with the same separators  20  as those the connecting piece  101  is provided with. All the separators  20  are arranged on the body  35 . In order to further improve the stability of the separators  20  on the body  35 , the separators  20  and the body  35  are formed as an integrated piece. In this embodiment, in order to achieve better performance of preventing point discharge and reduce the manufacturing cost, the separators  20  and the body  35  are formed as an injection molding piece, that is, the separators  20  and the body  35  are made into an integrated piece by injection molding. 
         [0094]    It should be noted that, the body  35  may be replaced with the body  10  in embodiment I. In embodiment II, the body  35  and the terminal accommodating cavities  351  are used for matching with electronic devices on a circuit board to form a male end connector. Because the circuit board and the electronic devices are regular and flat in structure, the installation portion  355  of the body  35  may be flat. According to different shapes and specifications of electronic devices or connecting terminals to be accommodated, it is not necessary for the terminal accommodating cavities  351  to be as complex as the terminal accommodating cavities ( 11 ,  12 ) in embodiment I, so that the manufacturing cost is reduced. 
       Embodiment IV 
       [0095]    Referring to  FIG. 8 , the present invention further provides a connector  104 . The connector  104  includes the connecting piece  103  of embodiment III and connecting terminals ( 71 ,  72 ). 
         [0096]    The connecting terminals ( 71 ,  72 ) may be replaced with the connecting terminals ( 40 ,  50 ) in embodiment I. In this embodiment, the connecting terminals ( 71 ,  72 ) are columnar. One end of each of the connecting terminals ( 71 ,  72 ) is arranged on a terminal accommodating cavity  351  of the body  35 , and the other end is used to be connected with a matched connector. 
         [0097]    In this embodiment, the connecting terminals ( 71 ,  72 ) include second low-voltage connecting terminals  71  and second high-voltage connecting terminals  72 . Terminal connecting pieces  88  connected with the second low-voltage connecting terminals  71  may be connected with a low-voltage line. Terminal connecting pieces  88  connected with the second high-voltage connecting terminals  72  may be connected with a high-voltage line. Each of the terminal connecting pieces  88  has a maximum radial dimension greater than that of the second low-voltage connecting terminal  71  and the second high-voltage connecting terminal  72 . The second low-voltage connecting terminals  71  are inserted into the first accommodating cavities  11 . The second high-voltage connecting terminals  72  are inserted into the second accommodating cavities  12 . 
         [0098]    In this embodiment, the second low-voltage connecting terminals  71  are inserted into the first accommodating cavities  11  in the direction along which the separators  20  are inserted into the body  10 . The second high-voltage connecting terminals  72  are inserted into the second accommodating cavities  12  in the direction along which the separators  20  are inserted into the body  10 . 
         [0099]    In order to conveniently insert the second low-voltage connecting terminals  71  and the second high-voltage connecting terminals  72  into the corresponding body  10 , all the second low-voltage connecting terminals  71  and all the second high-voltage connecting terminals  72  are preferably arranged on the body  35 . In this embodiment, the body  35  is provided with terminal accommodating cavities  351 . One end of each of the second low-voltage connecting terminals  71  and the second high-voltage connecting terminals  72  is inserted into the corresponding terminal accommodating cavity  351 , so that the second low-voltage connecting terminals and the second high-voltage connecting terminals can be respectively inserted into the corresponding first accommodating cavities  11  and second accommodating cavities  12  when the separators  20  are inserted into the body  10 . 
         [0100]    The second low-voltage connecting terminals  71  may be the same as or different from the first low-voltage connecting terminals  40  of embodiment III in structure. In this embodiment, the second low-voltage connecting terminals  71  and the first low-voltage connecting terminals  40  have different structures. The second low-voltage connecting terminal  71  has a roughly cuboid column structure. In this embodiment, the second high-voltage connecting terminals  72  and the second low-voltage connecting terminals  71  have the same structure and dimension. 
       Embodiment V 
       [0101]    Embodiment V provides another implementation of the connector  104 . In embodiment V, the connector  104  includes the connecting piece  103  of embodiment III and a circuit board (not shown in the figures). The circuit board is also referred to as a wiring board. Electronic devices (not shown in the figures) are arranged on the circuit board in a protruding mode. The circuit board may be arranged to be exactly opposite to one side of the installation portion  355  or attached to the outer bottom wall of the installation portion  355 . The electronic devices on the circuit board penetrate through the terminal accommodating cavities  351  to be connected with the matched connector on the other side of the installation portion  355 . 
       Embodiment VI 
       [0102]    Please refer to  FIG. 9  and  FIG. 10 , which show a matched connecting piece  105  provided by the present invention. The matched connecting piece  105  can be used for matching with the connecting piece  101  of embodiment I and the connecting piece  103  of embodiment III. The matched connecting piece  105  includes a female end seat  210 . The female end seat  210  is provided with insertion holes  212  and isolating slots  216 . 
         [0103]    Each insertion hole  212  is formed in a penetrating mode in the axial direction of the female end seat  210  and is provided with a front opening  213 , a rear opening  217 , an installation gap  214  and a radial gap  215 . In this embodiment, each insertion hole  212  is a through hole formed in a penetrating mode in the axial direction of the female end seat  210 . The front openings  213  of the insertion holes  212  are used for accommodating the connecting terminals ( 71 ,  72 ) of the connector  104  or electronic devices, and the rear openings  217  of the insertion holes  212  are used for accommodating the terminal connecting pieces  88  as described below. The installation gaps  214  are communicated with the front openings  213  to accommodate stop portions  92  of the second secondary locks  90  as described below, so that the second secondary locks  90  can be arranged on the matched connecting piece  105  in a more flat and more space-saving mode. The radial gaps  215  are formed on the side walls of the insertion holes  212  at the front end thereof and are in communication with the installation gaps  214 . The radial gaps  215  enable the insertion holes  212  to have a larger accommodating space so as to adapt to connecting terminals with larger dimension, thus having a higher universal performance. 
         [0104]    The isolating slot  216  is formed between the insertion holes  212  to be used for inserting the separators  20  of the connecting piece  103 . The arrangement relationship between the insertion holes  212  and the isolating slots  216  in this embodiment will be specifically described as follows: the insertion holes  212  are arranged in two rows, and each row includes a plurality of insertion holes  212 ; and the isolating slots  216  are formed between all the adjacent insertion holes  212 . In order to save materials and facilitate insertion fit, all the isolating slots  216  are arranged in communication with each other. 
         [0105]    In order to strengthen the stability, the matched connecting piece  105  may be made into an integrated piece by injection molding. 
       Embodiment VII 
       [0106]    Please refer to  FIGS. 11-15 , which show a matched connector  106  provided by the present invention. The matched connector  106  includes the matched connecting piece  105  of embodiment VI and terminal connecting pieces  88 . 
         [0107]    The terminal connecting pieces  88  are inserted into the rear ends of the insertion holes  212  from the rear openings  217  and can be connected with the connecting terminals ( 71 ,  72 ) inserted into the insertion holes  212  from the front openings  213  or electronic devices. A plurality of terminal connecting pieces  88  can be convenient for connection with other devices and lines. The terminal connecting pieces  88  are inserted into the rear ends of the insertion holes  212  in the direction opposite to the direction in which the separators  20  are inserted into the corresponding body  10 . Moreover, the terminal connecting pieces  88  are connected with the connecting terminals ( 71 ,  72 ) respectively. In order to achieve stable connection performance, each terminal connecting piece  88  is provided with an accommodating cavity  885 . The connecting terminals ( 71 ,  72 ) are inserted into the corresponding accommodating cavities  885  to connect the terminal connecting pieces  88 . The accommodating cavities  885  may be formed in the axial direction of the terminal connecting pieces  88  in a penetrating mode. 
         [0108]    In this embodiment, to prevent the terminal connecting pieces  88  from loosening and obtain a stable connection performance, the matched connector  104  further includes second secondary locks  90 . Each second secondary lock  90  is provided with a stop portion  92 . The stop portions  92  are partially in blocking fit with the ends of the terminal connecting pieces  88 . The stop portions  92  may be plate-like. Each second secondary lock  90  further includes a cover plate  94 . The cover plates  94  are connected with the stop portions  92  and extend in the axial direction of the insertion holes  212 , and the cover plates  94  cover the installation gaps of the insertion holes  212 . The cover plates  94  can provide sufficient isolation for the connecting terminals ( 71 ,  72 ) to avoid interference with the outside or electric shock or the like. 
         [0109]    The stable arrangement manner of the terminal connecting pieces  88  in this embodiment will be specifically described as follows: each terminal connecting piece  88  is provided with a stopping front portion  881  and a blocking matching portion  882  in the direction along which the terminal connecting pieces are inserted into the first accommodating cavities and the second accommodating cavities. The stop portions  92  are at least partially in blocking fit with the stopping front portions  881  of the terminal connecting pieces  88 . In this embodiment, a second barb  48  is further provided in each of the first accommodating cavities  11  and the second accommodating cavities  12  respectively. The second barbs  48  are respectively in blocking fit with the blocking matching portions  882  of the terminal connecting pieces. 
       Embodiment VIII 
       [0110]    Please refer to  FIG. 16  to  FIG. 20 , which show a connecting assembly  107  provided by the present invention. The connecting assembly  107  includes any one of the connecting piece  101  of embodiment I and the connecting piece  103  of embodiment III, and the matched connecting piece  105  of embodiment VI. 
         [0111]    The connecting assembly  107  may realize connection through wires. In this embodiment, to further achieve a stable electric connection, the connecting assembly  107  includes connecting terminals ( 40 ,  50 ,  71 ,  72 ). One end of each of the connecting terminals ( 40 ,  50 ,  71 ,  72 ) is arranged on the body  35 , and the other end is inserted into the insertion hole  212 . In order to improve the integration level of electronic devices, the connecting assembly  107  further includes a circuit board (not shown in the figures). One end of each of the connecting terminals ( 40 ,  50 ,  71 ,  72 ) is connected to the circuit board. In order to connect other devices, the connecting assembly  107  further includes terminal connecting pieces  88 . The terminal connecting piece  88  is accommodated in the insertion hole  212  and connected with the other end of each of the connecting terminals ( 40 ,  50 ,  71 ,  72 ). 
         [0112]    For the purpose of convenient description, just take the matching relationship between the connecting piece  103  of embodiment III and the matched connecting piece  105  of embodiment VI as an example to describe as follows: the connecting terminals ( 71 ,  72 ) are installed into the terminal accommodating cavities  351 ; then, the separators  20  are aligned with the isolating slots  216  of the matched connector  106 ; the connecting terminals ( 71 ,  72 ) of the connector  104  are inserted from the front ends of the insertion holes  212  to connect the terminal connecting pieces  88  inserted from the rear ends of the insertion holes  212 . 
         [0113]    Compared with the prior art, the connecting pieces ( 101 ,  103 ) of the present invention are provided with separators  20  on the bodies ( 10 ,  35 ) so that the connecting terminals ( 40 ,  50 ,  71 ,  72 ) inserted into the terminal accommodating cavities ( 11 ,  12 ,  351 ) on the bodies ( 10 ,  35 ) are separated, which improves the safe connection performance, enables all the connecting terminals ( 40 ,  50 ,  71 ,  72 ) to keep shorter spacing on the premise of no mutual interference, and enables the connecting pieces ( 101 ,  103 ) to be compact in overall structure and to reduce the installation space. 
         [0114]    Preferably, via the transverse separators  21  matching with the longitudinal separators  22 , the separators  20  of the connecting pieces ( 101 ,  103 ) not only improve the safety performance of the connecting pieces ( 101 ,  103 ) including a plurality of connecting terminals ( 40 ,  50 ,  71 ,  72 ), but also provide larger accommodating space for installing the connecting terminals with different specifications. The connecting pieces ( 101 ,  103 ) achieve a quick and convenience insertion, provide different connection manners, and can be matched with the matched connecting piece  105  to meet different connection requirements. 
         [0115]    The foregoing descriptions are merely preferred embodiments of the present invention, but are not intended to limit the protection scope of the present invention. Any modification, equivalent substitution or improvement or the like made within the spirit of the present invention shall fall into the scope of the claims of the present invention.