Electrical connector equipped with discrete bottom plate for mounting to PCB

An electrical connector including a contact module having an insulative housing with a plurality of contacts disposed therein and enclosed within a first metallic shell, and a second metallic shell attached to the first shell and located between the first shell and the printed circuit board so as to allow the raised type mating cavity which is formed by the first shell. The contact module includes a metallic shielding plate with an oblique section. A pair of Z-shaped fixing columns are located by two sides of the oblique section.

BACKGROUND OF THE DISCLOSURE

1. Field of the Disclosure

The invention is related to an electrical connector and particularly to the electrical connector adapted to be mounted to a printed circuit board and compliant with the device casing. The instant application relates to the copending application with a Ser. No. 15/817,321, having the same inventors and the same applicant and titled “ELECTRICAL CONNECTOR EQUIPPED WITH AN OBLIQUE STRUCTURE FOR PROVIDING RECEIVING SPACE”.

2. Description of Related Arts

Chinese Patent Application Publication No. 105375157A and CN105322386A both disclose the so-called sink type connector which is located in a notch of the printed circuit board for a low profile arrangement, thus unfitting the device casing having the upper or standard level insertion opening for the electrical connector.

It is desired to provide an electrical connector which is essentially mounted upon the printed circuit board with proper support around the shell, and has the corresponding upper insulator and lower insulator both essentially extending in an oblique manner around for compliance with the obliquely extending retaining sections of the contacts.

SUMMARY OF THE DISCLOSURE

To achieve the above desire, an electrical connector adapted for mounting to an upper surface of the printed circuit board, including a contact module having an insulative housing with a plurality of contacts disposed therein and enclosed within a first metallic shell, and a second metallic shell attached to the first shell and located between the first shell and the printed circuit board so as to allow the raised type mating cavity which is formed by the first shell. The contact module includes a metallic shielding plate with an oblique section. A pair of Z-shaped fixing columns are located by two sides of the oblique section.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

Reference will now be made in detail to the embodiments of the present disclosure. Referring toFIGS. 1-14, an electrical card connector100is used to be mounted to an upper surface201of a printed circuit board200. The electrical connector10includes a contact module10, a first metallic shell20, a second metallic shell30, a first insulating film40and a second insulating film50.

The contact module10includes an insulative housing11, a plurality of contacts15disposed in the insulative housing11, the waterproof plate17enclosing the contacts15, and a metallic shielding plate19embedded within the insulative housing11. The insulative housing11includes a base111and a tongue portion112extending forwardly from the base111and forming opposite upper surface113and lower surfaces114. The base111forms a groove115and the holes116communicating with the groove115. The waterproof plate17fills both the groove115and the holes116. The base further forms escaping holes117communicating with the holes116. The base111includes a front region118, the rear region119and a middle region120between the front region118and the rear region119in a front-to-back direction. The holes116are formed in the middle region120. The groove115is formed between the front region118and the rear region119. The escaping holes117are formed in the rear region119which forms a bottom portion121, and the escaping holes117extend through the bottom portion121forwardly and downwardly. The escaping holes117may assure flowing the glue for forming the waterproof plate17.

The contacts15includes the upper contact151and the lower contacts151. The upper contact151includes a front upper contacting section153exposed upon the upper surface113of the tongue portion112, the middle upper retaining section154embedded within the housing11, and a rear upper soldering section155extending out of the housing11. The lower contact152includes a front lower contacting section156exposed upon the lower surface114of the tongue portion11, a middle lower retaining section157embedded within the housing11, and a rear lower soldering section158extending out of the housing11. Notably, in this embodiment, an oblique section (not labeled) is formed between the upper retaining section154and the upper soldering section155, and similarly an oblique section (not labeled) is formed between the lower retaining section157and the lower soldering section158for complying with the oblique portions of the upper insulator122and the lower insulator123.

The housing11includes an upper insulator122, the lower insulator123and the covering insulator124. The upper contacts151and the upper insulator122commonly form the upper contact module125, and the lower contacts142and the lower insulator123commonly form the lower contact module126. The upper contact module125, the lower contact module126are assembled to commonly sandwich the shielding plate19therebetween as a sub-assembly and the covering insulator124are applied upon the sub-assembly.

The shielding plate19includes a horizontal section191, a pair of soldering legs192extending our of the housing11for mounting to the printed circuit board200, and an oblique section132between the horizontal section191and the pair of soldering legs192. The oblique section193extends rearwardly and downwardly to have the tongue portion112raised upwardly correspondingly. The horizontal section191forms a pair of latching sections194on two lateral sides for locking with the corresponding plug connector. The shielding plate19forms an opening195corresponding to the holes116so as to assure flowing of the glue for forming the waterproof plate17.

The upper insulator122has a first middle fixing hole129at the middle region in the transverse direction, the lower insulator123has the second middle fixing hole128corresponding to the first fixing hole129. The insulative housing11further includes a first fixing column129extending through both the first middle fixing hole and the second middle fixing hole. The upper insulator122has the first side fixing hole131, and the lower insulator123has the second side fixing hole132. The insulative housing11further includes a second fixing column133extending through both the corresponding first side fixing hole131and second side fixing hole132. Notably, the first fixing column129and the second fixing column133are formed via the same insert-molding or over-molding process during forming the covering insulator124. Notably, the upper insulator122and the lower insulator123form the oblique surface134and the platform135around the second fixing column133for easy forming the second fixing column133.

The lower insulator123forms the positioning post136, and the upper insulator122forms the positioning hole137in which the positioning post136is received. Notably, both the first fixing column129and the second fixing column133are of a Z-shaped configuration for assuring the upper soldering sections155of the upper contacts151and the lower soldering sections158of the lower contacts152are coplanar with each other. In this embodiment, the upper insulator122and the lower insulator123form the corresponding oblique portions (not labeled) to commonly sandwich the oblique section193of the shielding plate19therebetween compliantly.

The first shell20enclosing the housing11and includes a bottom face21close to the printed circuit board200, a top face22opposite to the bottom face21, the side faces23connecting the bottom face21and the top face22. All the bottom face21, the top face22and the side faces23commonly form the mating cavity24. The top face22forms a downward recess221, and the bottom face21forms a pair of upward recesses211. The first insulating film40is attached upon the top face22to cover the downward recess221, and the second insulating film50is attached upon the bottom face21to cover the upward recesses211.

The second shell30is attached to the first shell20and includes a pair of mounting legs31and a plate32attached upon the bottom face21wherein the plate32and the mounting legs31are coplanar with each other. The second shell30further includes a pair of wings33extending upwardly to be soldered to the side faces23, respectively The mounting leg31includes a screw hole311for mounting to the printed circuit board200. In this embodiment, the screw hole311is open sidewardly for easy forming by stamping. The plate32is located under the bottom face21so as to raise upon the mating cavity24for complying with the opening of the device casing. A pair of ribs321are formed upon the plate32by two sides of the second insulating film50with a thickness of more than 0.1 mm to be larger than that of the second insulating film50which is generally 0.06 mm so as to assure reliable soldering between the ribs321and the bottom face21without hindrance of the second insulating film50.

The rear region119of the base111has a top face lower than the top face22of the shell20so as to form a receiving space140for receiving the electronic parts. The first shell20further includes a pair of bending pieces25extending from the side faces23for preventing backward movement of the contact module10during mating, and a pair of securing pieces26for restraining outward deflection of the side extensions231. A pair of securing tabs29opposite to the corresponding bending pieces25in the vertical direction for being received within corresponding recesses139in an undersurface of the bottom portion121to upwardly cover the corresponding second fixing column133. The first shell20includes an oblique section (not labeled) compliantly covering the corresponding oblique portion of the upper insulator122so as to leave a relatively large receiving space140above as mentioned before. Notably, as shown inFIG. 13, the receiving space140is essentially aligned with the mating cavity24in the front-to-back direction.

While a preferred embodiment in accordance with the present disclosure has been shown and described, equivalent modifications and changes known to persons skilled in the art according to the spirit of the present disclosure are considered within the scope of the present disclosure as described in the appended claims.