BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is an exploded view of a PC card kit in accordance with the present invention;
FIG. 2 is another exploded view of the PC card kit shown in FIG. 1, while taken from a different aspect;
FIG. 3 is a partly enlarged view taken from the circle in FIG. 2;
FIG. 4 is a perspective view of a bottom cover of the PC card kit; and
FIG. 5 is a perspective view of the PC card kit shown in FIG. 1.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
Referring to FIGS. 1, 2 and 5, a PC card 100 in accordance with the present invention for mounting to an electronic device (not shown) includes a pair of metal shells 3, 4, a printed circuit board (not shown) interposed between the shells 3, 4, an insulative frame 2 supporting the printed circuit board, a top cover 5 and a detachable bottom cover 6 mounted to the insulative frame 2. The insulative frame 2 is integrally formed as a rectangular member and includes a pair of longitudinal rails 21, 22, a traverse bar 23, and a connecting bar 24 connected the rails 21, 22 respectively at front and rear ends of the rails 21, 22. A plurality of slits 201 are respectively defined on the rails 21, 22 and the traverse bar 23.
Referring to FIGS. 2 and 3, the fixed top cover or a projecting extension portion extends from the rear ends of the rails 21, 225, which designated number 5. A front end 55 of the top cover 5 is connecting with the frame 2. The top cover 5 has a plate 50, a pair of sidewalls 51, 52 extending upwardly from the plate 50, and a rear wall 53 connecting the sidewalls 51, 52. The sidewalls 51, 52, the rear wall 53, and the plate 50 form a space. A plurality of projections 501 are respectively defined on the sidewalls 51, 52 and the rear wall 53. Each sidewall 51, 52 has a plurality of ribs 502 on the inner face thereof for guiding the insertion of the printed circuit board. A recess 54 is defined on each sidewall 51, 52 of the top cover 5 and close to the rear ends of the rails 21, 22.
Referring to FIGS. 1 and 2, the metal shells are rectangular shape and include a top shell 3 and a bottom shell 4. A plurality of interference tabs 301 extending from opposite sides and rear edge of the top shell 3. The interference tabs 301 are engaging with the slits 201 of the insulative frame 2 for securing the top shell 3 to the insulative frame 2. The bottom shell 4 includes a pair of sidewalls 41, 42 at two opposite side thereof. Two connecting members 43 are formed at a rear end of the bottom shell 4.
Referring to FIG. 4, the bottom cover 6 includes a plate 60, a pair of sidewalls 61, 62 extending upwardly from the plate 60, and a rear wall 63 connecting the pair of sidewalls 61, 62. A plurality of grooves 601 are defined on the sidewalls 61, 62 and the rear wall 63. The bottom cover 6 has a front end 65 opposite to the rear wall 63. A plurality of connecting members 602 are formed on the front end 65 for engaging with the connecting members 43 of the bottom shell 4. A protrusion 64 is formed on each sidewall 61, 62 and behind the front end 65 in a front to back direction.
In assembly, the bottom shell 4 and the top shell 3 sandwich the insulative frame 2 therebetween to form a tabular portion with a first close space therein. The tabular portion and the top cover 5 constitute a case body wherein the space of the top cover 5 is exposed to an exterior of the case body. The bottom cover 6 is assembly to the top cover 5 thereby forms another close space. The projections 501 and the grooves 601 are mating with each other to form a latch mechanism for securing the bottom cover 6 to the top cover 5. In the same time, the protrusions 64 are received in the recesses 54 in an up to down direction for positioning the bottom cover 6 on the top cover 5. Since the top cover 5 is connected with the rear ends of the insulative frame 2, more importantly, the bottom cover also borders the case body at the joint section of the top cover 5 and the insulative frame 2 in a front to back direction, so the intension of this section is weak and easy to be destructed. The protrusion 64 and the recess 54 form an auxiliary enforcement mechanism for positioning the bottom cover 6 to the top cover 5 when the PC card is working. The protrusion 64 and the recess 54 are entirely enclosed within the top cover 5 and the bottom cover 6. The enforcement mechanism can prevent the displacement between the bottom cover 6 and the top cover 5. The enforcement mechanism also resists the torsion and the inflection brought by an outside force so that the PC card kit has an improved intensity.
It is to be understood, however, that even though numerous characteristics and advantages of the present invention have been set forth in the foregoing description, together with details of the structure and function of the invention, the disclosure is illustrative only, and changes may be made in detail, especially in matters of shape, size, and arrangement of parts within the principles of the invention to the full extent indicated by the broad general meaning of the terms in which the appended claims are expressed.
Patent Application
20070279874
