Patent Publication Number: US-6210236-B1

Title: Casette and two-layer type of wire-connection chassis

Description:
BACKGROUND OF THE INVENTION 
     The two-layer type of wire-connection chassis as shown in FIG. 8 is a novel wire-connection chassis of the applicant&#39;s filed previously (under application No. 82313632 and new model application No. 103909); the prime feature of the aforesaid application is to improve the drawback of the conventional one-layer type of wire-connection chassis, which takes a considerable area and space of a PCB (printed circuit board), while the present invention will reduce the area and space required by the electronic parts without affecting the functions thereof. The structure of the previous invention as shown in FIG. 8 comprises a receptacle body  24 , an upper-layer conductive pin base, a lower-layer conductive pin base, and a plurality of conductive pins respectively. As shown in FIG. 5, the wire-connection chassis can be plugged on a PCB  26  by means of a plurality of conductive pins  25 ; then, both of them are mounted in casings  29  and  30 ; the bottom surface of the PCB  26  is almost attached to the casing  30 , and the space supported with some short post  28  them is too marrow to install any electronic parts; in other words, electrical parts  27  can only be mounted on the top surface of the PCB. In that case, the space available is limited, while the space in the casings  29  and  30  is wasted; as a result, the dimensions of the equipment will be increased without providing additional functions of the equipment, and therefore improvement thereof is required. 
     SUMMARY OF THE INVENTION 
     In view of the drawbacks of the aforesaid conventional two-layer type of wire-connection chassis and the PCB thereof, some improvements are required; therefore, the inventor has developed further improvements for the previous two-layer type of wire-connection chassis. The improved chassis not only can provide it with a simple structure, but also can provide a structure, in which the upper-layer and the lower-layer pins extend out of the mid-section of the seal plate of the wire-connection chassis so as to facilitate a PCB to assemble with the chassis; then, both sides of the PCB mounted in the middle of the casing can be mounted or soldered with electrical parts; in other words, the limited space in the casing will be used completely and fully, and it is deemed quite useful to the current equipment which all require a popularity of small and thin dimensions. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     FIG. 1 is a sectional view of the present invention, showing two sides thereof. 
     FIG. 2 is a perspective view of the present invention, being disassembled from a printed circuit board. 
     FIG. 3 is a sectional view of the present invention, showing two sides of an upper-layer conductive pin base thereof. 
     FIG. 4 is a sectional view of the present invention mounted in a body portion together with a printed circuit board. 
     FIG. 5 is s sectional view of the present invention, showing a plug-type wire-connection chassis and a printed circuit board mounted in a body portion. 
     FIG. 6 is a sectional view of another embodiment of the present invention, showing the two sides thereof. 
     FIG. 7 is a sectional view of another embodiment of the conductive pin base of the present invention, showing the two sides thereof. 
     FIG. 8 s a sectional view of a plug-type wire connection chassis, showing the tow sides thereof. 
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
     This invention relates to a cassette and two-layer type of wire connection chassis, which comprises, as shown in FIG. 1, a receptacle body  10 , a seal plate  11 , a plurality of upper-layer conductive pin bases  12  and conductive pins  13 , a plurality of lower-layer conductive pin base  15  and conductive pins  16 , and a metal shield  14 . Both the receptacle body  10  and the seal plate  11  are plastic parts by injection molding. One end of the receptacle body has a plurality of plug parts  101  for receiving plugs to provide electrical connection; the number of the plug part  101  can be designed into two or an even number in accordance with requirement (for example, eight (8) parts are provided in the present invention). The inner portion of the receptacle body is plugged with the upper-layer and lower layer conductive pin bases  12  and  15  respectively. A metal shield  14  is mounted between the upper-layer conductive pin bases and the lower-layer conductive pin bases so as to prevent from interference and crosstalk between the upper-layer conductive pins and the lower-layer conductive pins. The rear side of the receptacle body  10  is covered with a seal plate  11  so as to have the aforesaid parts sealed in the receptacle body  10 , and only to have the rear ends of the conductive pins  13  and  16  extended out of the partition slots  111  of the seal plate so as to connect with a PCB (printed circuit board). The outer side of the seal plate  11  are finished, by molding, with a pair of opposite guide clamps  112  having recess channels respectively for champing and connecting with the PCB. The recess channel may be furnished with a form as shown in FIG. 6, i.e., a through recess channel so as to fit a PCB having different width. FIG. 2 is a perspective view of the present invention, being disassembled from a PCB; the plug parts  101  of the receptacle body  10  are used for receiving plugs. The PCB  17  is pushed and mounted in place by means of the guide clamp of the seal plate  11 , and is held with the upper-layer and lower-layer conductive pins; the current of every conductive pins will then be transmitted to the various electrical parts  18  and  19  in the circuits of the PCB for rectification and transformation process. The model or shape of the upper-layer and lower-layer conductive pins bases and the pins thereof is all the same, but the two layers are arranged in opposite position. FIG. 3 is a sectional view and a plan view of the upper-layer conductive pin base  12  and the conductive pins  13  thereof. The conductive pin base  12  is a plastic parts formed by means of injection molding so as to have all pins therein fixed together; the prime feature thereof is that the mid-section of the conductive pin is sealed and fixed in place by means of the conductive pin base  13 , while the front resilient section  131  of the conductive pin is the same as the ordinary conductive pin, i.e., being bent backwards at a given angle; the resilient section  131  of the pin is standing upwards in the receptacle to be in contact with a plug electrically. The fastened section  132  of the conductive pin is not covered, and the rear end thereof is bent into a curved shape or at an acute angle. FIG. 4 is a sectional view of the present invention,showing the present invention and a PCB  17  being mounted in casings  22  and  23 ; the PCB  17  is plugged into the guide clamps  112  and between the upper-layer conductive pins  13  and the lower-layer conductive pins  16 ; in that case, both the top and bottom surface of the PCB  17  can be mounted with electrical parts  18  and  19  respectively. In order to have the PCB mounted in place firmly, a plurality of short parts  20  and  21  can be mounted between the bottom side of the PCB and the casing  23 . FIG. 6 shows another embodiment of the present invention, in which the receptacle body  31  is mounted with the upper-layer and lower-layer conductive pin bases  33  and  35 , conductive pins  34  and  36  and a metal shield. The forms of the conductive pin and the conductive pin base are shown in FIG. 7; the resilient section  341  of the conductive pin  34  is bent into a convex-shaped form; when the resilient section is pressed with a plug, it will provide a resilient and class contact electrically; the fastened section  342  of the conductive pin is the same as shown in FIG. 3, i.e., either a curved shape or an acute angle shape. 
     Briefly, the present invention is a further improvement to the previous improvement on conventional one-layer type of wire connection chassis as a result of the drawbacks thereof disclosed later so as to save more space of the chassis to increase the functions thereof (i.e., more electric parts can be mounted under the PCB); furthermore, the structure of the present invention has been much simple so as to meet the requirements to of the modern small electronic products, and to lower the manfactural cast and also to provide a better conductive (i.e., the short conductive pin will have less impedance). It is apparent that the present invention is deemed novel, advanced and practical; thereof, a “letter patent” is solicited on the merits.