With respect to
Referring to
The switch module 121 also includes a receiving chamber (not labeled) defined at a center position thereof for receiving an actuator 1212. As similarly illustrated in prior references, such as U.S. Pat. No. 6,974,920, the switch module 121 also comprises four dome-shaped conductive plates disposed around a central plate (shown in FIG. 3 or FIG. 6 of U.S. Pat. No. 6,974,920). These five plates are respectively electrically connected to corresponding contacts 12113 disposed at the bottom wall when the actuator 1212 tilts close to one of four selected plates or is depressed to close the central plate, and can send a selected function command to the printed circuit board 122 due to an electrical jointing between the contacts 12113 and the traces formed on the printed circuit board 122.
However, in another preferred embodiment, the switch module 121 is only designed to achieve several functions, and includes a pair of conductive plates and a central plate that are electrically connected to the contacts 12113. For example, along one horizontal axis, the actuator 1212 can be tilted to close two existing conductive plates, or depressed to press the central plate, for providing an electrical connection. Along another horizontal axis, in this embodiment, which is perpendicular to said horizontal axis, the actuator 1212 can be tilted, however, for reason of absence of two conductive plates, cannot achieve an electrical connection. In other words, even through the actuator 1212 is driven toward these two direction, these are no corresponding functions reflected by the portable audio player. In addition, as similarly illustrated in FIG. 2 of prior reference, U.S. Pat. No. 6,344,618, a metal shell with a hollow open formed thereon, through which the actuator 1212 extends, is provided for shielding the base 1211 and soldering with the printed circuit board 122, thereby consequently holding the switch module 121 in position, and preventing EMI (Electro-Magnetic Interference).
Referring to
Referring to
The manual handle 11 is assembled to the switch module 121, with a upper portion of the key seat 1213 being fittingly received in the rounded receiving space 112. During operation by a user, the manual handle 12, together with the actuator 1212, may be synchronously tilted forwardly or rearwardly along the lengthwise direction, and achieve corresponding functions, or may be synchronously pressed downwardly for achieving another function. And, the lateral receiving space 113 receives the angled inclining portions 12111 and provides enough deflective angle for the manual handle 11 and the actuator 1212. However, when the manual handle 12 is tilted toward lateral direction for a mistake operation by users, the ribs 114 will abut against a top surface of metal shell, presumed that a metal shell is provided, or abut against the top surface of the base 1211, for limiting tilts of the manual handle 11 and actuator 1212.
In another preferred embodiment, the ribs 114 are formed on the top surface of the base 1211 and at two remote ends of a diagonal of the base 1211. This design also can prevent abundant operation for anticipative abuttal between the ribs 114 and the bottom wall of the truncated conical portion 119. Obviously, if the metal shell is provided, a corresponding through hole (not shown), through which the ribs 114 extends, must be provided accordingly. And, it is noted that other shapes structures can replace the ribs 114 formed either at the manual handle 11 or at the switch module 121, such as conic protruding, inclining protruding. By these alternative structures, the needless directional operation also can be bared.
Referring to
With respect to
With respect to
With respect to
The flexible cable 70 includes a plurality twisting wires or parallel wires 79 for transmitting data signals, such as power signal or audio signal, and an insulative jacket 701 surrounding the wires 79, with front parts of wires 79 being exposed beyond the insulative jacket 701. Each wire 79 includes at leas a conductor (not shown) for electrically terminated to the printed circuit board 51, and achieving an electrical connection therebetween. The stress relief 71 is integrally molded with a front part of the cable 70. Referring to
The stress relief 71 also includes an annular slot 711, and a rod 713 behind the annular slot 711. The annular slot 711 is lower than the rod 713 and the columned head 712, and shaped as a neck-like configuration. Reversely, each cover half 2, 3 forms a semi-circle rib 21, 31 extending inwardly from inner surfaces thereof, and sequentially, the cover halves 2, 3 form a circumferential rib when these two cover halves 2, 3 engage with each other. The circumferential rib surrounds and interferentially engages with the annular slot 711. By above cooperation, the stress relief 71 is reliably hold in position and can hardly remove forwardly or rearwardly relative to the cover halves 2, 3. Behind the semi-circle rib 21, 31, each cover half 2, 3 form a smooth receiving room 22, 32, with a diameter being increased along a front-to-rear direction after engagement of two cover halves 2, 3. Therefore, these two receiving room 22, 32 together defines a general conic room. Corresponding, a front portion of the rod 713 is shaped smoothly to form an ascending wall 7112, this wall 7112 forms an ascending grade structure for fitly engaging with the general conic room.
According to above description, the columned head 712 is fitly and closely received in rounded receiving space 23, 23, the V-shape inclining cut 7121 is fitly engaged with the inclining protruding 24, for preventing a distortion upon the cable 70 and stress relief 71. Further, an engagement of the annular slot 711 and the ribs 21, 31, can hold the stress relief 71 in position. An engagement of the ascending wall 7112 fitly and closely is received in the conic room for decreasing distortion when a twisting occurs upon the cable 70. In brief, due to the design of stress relief 71, the cable 70 and the stress relief 71 and joint between the cable 70 and the printed circuit board 51 can hardly suffer from distortion even if a twisting happens to cable 70.
With respect to
During a process to mold the stress relief 71 over the cable 70 conveniently, a pair of poles (not shown) is adopted to hold the cable 70 in position. Then after subsequent processes of cooling the melted plastic material and taking way the mold, a pair of apertures 7123, 7124 are formed.
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.
Number | Date | Country | Kind |
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200620072333.6 | Apr 2006 | CN | national |