Patent Application
20110303522
1. Technical Field
The disclosure relates, generally, to a device control, and particularly, to a control assembly of electronic devices.
2. Description of Related Art
Many electronic devices include a housing with an interior compartment receiving a printed circuit board (PCB) therein. The electronic device often includes a control assembly for directing various operations. In use, however, the controls of the electronic device are prone to accidental activation. Thus, accuracy and reliability of such controls is less than dependable.
Therefore, there is room for improvement within the art.
The components in the drawings are not necessarily drawn to scale, the emphasis instead being placed upon clearly illustrating the principles of the present disclosure. Moreover, in the drawings, like reference numerals designate corresponding parts throughout several views, and all the views are schematic.
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The switch 30 is a block. The switch 30 further defines a contact protrusion 31 on a top surface of the switch 30. The contact portion 25 extends from an end surface of the guide portion 23 away from the moving portion 21 corresponding to the contact protrusion 31. When the external force is applied to force member 20, the resilient member 40 is compressed until the contact portion 25 reaches the contact protrusion 31 of the switch 30, which opens accordingly.
The resilient member 40 can be a spring, a foam ring, rubber ring, or any elastic element. In the illustrated embodiment, the resilient member 40 is a foam ring.
During assembly, the switch 30 is first electrically fixed on the printed circuit board 105. The resilient member 40 is then placed on the printed circuit board 105 and surrounds the corresponding switch 30. Next, the force member 20 is received in the mounting hole 102. Finally, the fixing members 103 fixedly pass through the corresponding fixing holes 106 to fix the control assembly 100 between the housing 101 and the printed circuit board 105. At the same time, the resilient member 40 abuts the contact portion 25. Due to the resilient member 40 abutting the contact portion 25, the control assembly 100 prevents accidental activation.
In use, the force member 20 of the control assembly 100 cannot relocate along a horizontal axis of the housing 101 due to the guide portion 23, such that the force member 20 cannot be locked into the housing 101. In addition, because the side surface 231 of the guide portion 23 is angled with an axis of the guide portion 23, and matches an inner surface of the conical frustum portion 104 of the mounting hole 102, the housing 101 of the electronic device is sealed to external contaminants. Furthermore, because the guide portion 23 is a conical frustum and an outer diameter of the guide portion progressively increases toward the switch 30, friction during the slide of the force member 20 is decreased, and the control assembly 100 is more sensitive.
In an alternative embodiment, the side surface 231 of the guide portion 23 may be parallel to a moving direction of the force member. At this time, the cylindrical portion 107 can be replaced to a conical frustum portion, and the moving portion 21 can be changed to match the conical frustum portion.
Finally, while various embodiments have been described and illustrated, the disclosure is not to be construed as being limited thereto. Various modifications can be made to the embodiments by those skilled in the art without departing from the true spirit and scope of the disclosure as defined by the appended claims.
| Number | Date | Country | Kind |
|---|---|---|---|
| 201010195165.0 | Jun 2010 | CN | national |
