Patent Application
20090156260
1. Field of the Invention
The present invention relates generally to electronic devices and more particularly, to the routing of an electrical cable connecting a rotating housing to a stationary housing of the electronic device.
2. Introduction
There is a trend within the field of electronic devices, and especially within the field of cellular phones to split the phones in two parts that may be turned or rotated in relation to each other. Example electronic devices are Motorola's i90c, i95c1, V60, V66, and Timeport P8097 phones are configurable into their open and closed positions by rotating one part of the phone containing the audio transducer about a hinge relative to another part of the phone containing the microphone, wherein the rotation of the flip member occurs in a plane perpendicular to the plane containing the base member. Such phones or devices are typically referred to as “clamshell” or “flip” devices. Electronic devices such as Motorola's V70 phone are configurable into their open and closed positions by similarly rotating the part of the phone containing the audio transducer relative to another part of the phone containing the microphone; however, in these devices, the rotation occurs in a plane substantially parallel to the plane containing the part of the device housing the microphone. Electronic devices such as Motorola's V70 phone may be referred to as “twist”, “swivel”, or “rotational” devices. Reconfigurable devices such as the V70 are used primarily to minimize the size of the device while the device is in its standby mode or closed position, while providing a more conventional phone or device feel to the user when the device is in its in-use mode or open position.
However, due to the reduction in size of these electronic devices, it becomes more difficult to have all circuits confined exclusively to one particular area of the communication device. This leads to the need of providing signals and power between the two parts or halves while at the same time allowing safe rotation of the two parts in relation to each other. One way is to route signals and power is to provide a flex film with conductors known as a flex circuit in the interior of a hinge. However, such a film may be subject to bending causing damage to the conductors and due to the physical characteristics of the film may impede the rotation of the hinge.
For the reasons stated above, and for other reasons stated below which will become apparent to those skilled in the art upon reading and understanding the present specification, there is a need in the art for electrically connecting a stationary housing and a rotating housing of a device. There is also a need for a hinge to align and integrate the rotating housing to the stationary housing of a rotator phone.
A method and apparatus that electrically connects a stationary housing and a rotating housing of a device through a hinge assembly is disclosed. The method may include a spline hinge assembly having first and second access planes, and a cable that is ribbonized at the housing and bundled at the hinge assembly that has the ability to transmit torque from the fixed half of the device to the rotating half. A split construction hinge assembly allows the rotational half of the device to be a separate sub-assembly from the fixed half sub-assembly. Through an index/castled spline, the two halves can be properly aligned and assembled, and have the ability to transmit a torque.
In order to describe the manner in which the above-recited and other advantages and features of the invention can be obtained, a more particular description of the invention briefly described above will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings. Understanding that these drawings depict only typical embodiments of the invention and are not therefore to be considered to be limiting of its scope, the invention will be described and explained with additional specificity and detail through the use of the accompanying drawings in which:
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The features and advantages of the invention may be realized and obtained by means of the instruments and combinations particularly pointed out in the appended claims. These and other features of the present invention will become more fully apparent from the following description and appended claims, or may be learned by the practice of the invention as set forth herein.
Various embodiments of the invention are discussed in detail below. While specific implementations are discussed, it should be understood that this is done for illustration purposes only. A person skilled in the relevant art will recognize that other components and configurations may be used without parting from the spirit and scope of the invention.
The invention comprises a variety of embodiments, such as a method and apparatus and other embodiments that relate to the basic concepts of the invention.
This invention concerns electrically connecting a stationary housing and a rotating housing of a device through a spline hinge assembly.
The rotating housing 120 can be rotated about two axes. Specifically, the rotating housing 120 can be rotated such that the angle between the bottom surface of the rotating housing 120 and the corresponding top surface of the stationary housing 110 varies or such that the angle between the longitudinal axis of the rotating housing 120 and that of the stationary housing 110 varies. The stationary housing 110 and rotating housing 120 or the stationary and rotating halves can open both 180 degrees clockwise and counter clockwise for a total of 360 degrees of rotational motion. Preferably, the spline hinge assembly 140 is formed at the central position of one end of the stationary housing 110 and rotating housing 120. Specifically, the rotating housing 120 is rotatably connected to the stationary housing 110 via the spline hinge assembly 140 in a direction in which the rotating housing 120 moves away from the stationary housing 110 via the rotation of the rotating housing 120 about a center of rotation from the position where the rotating housing 120 is substantially placed on the stationary housing 110. The movement between the two housing is measured by arc 130. The rotating housing 120 can be rotated about the hinge in the direction in which the rotating housing 120 moves away from or toward the stationary housing 110. The spline hinge assembly 140 is provided at one end of the stationary housing 110 while being extended vertically.
The rotating housing 120 is rotatably connected to the stationary housing 110 via the spline hinge assembly 140. The spline hinge assembly 140 has a split construction that allows the rotational half 120 of the device to be a separate sub-assembly from the fixed or stationary half 110. The spline hinge assembly 140 is positioned at the center of rotation and the spline hinge assembly 140 has the ability to transmit torque from the stationary housing 110 or fixed half of the device to the rotating housing 120 or rotating half by use of a spline and gear mechanism. The spline hinge assembly 140 has at least one spline rib 240 that meshes with internal spline grooves on the inner wall of the rotating housing 120. The spline rib and groove allows the rotating housing 120 and the stationary housing 110 to be properly aligned and assembled, and also have the ability to transmit torque through a gear assembly. The barrel section of the spline hinge assembly 140 defines an opening of substantially cylindrical cross-section that is aligned with the rotating housing 120 so as to be collinear. The projecting indexing element (spline rib 240) comprises a short protrusion with a rounded or beveled tip extending from the proximal end of the spline hinge assembly 140.
In addition to providing sub-assembly integration and torque transferring, the spline housing assembly 140 provides an access point or via for a cable to route signals and power from the respective halves of the device. Cable 270 is a micro-coax cable that is ribbonized at the stationary housing 110 and at the rotating housing 120 of the device and bundled in the spline hinge assembly 140. The individual strands of the micro-coax cable have small diameter and lightweight for easy routing with superior mechanical strength and flex life characteristics. In flat ribbon form, cable 270 or the micro-coax cable provides stable electrical properties and excellent electro magnetic interference (EMI) protection without any extra shielding, dramatically reducing the profile of the cable 270. When the cable 270 enters the spline hinge assembly 140 from either the stationary housing 110 or rotating housing 120 it is in a flat ribbon form. The spline hinge assembly 140 may include one or more ramped, radius or chamfered surfaces 250 that taper outward allowing the micro-coax cable or cable 270 to lay flat as it enters and exits the spline hinge assembly 140 without bulging upward and provides strain relief for the individual coax lines. A grommet surface 260 at the second access plane can be used to protect the micro-coax cable 270 from any sharp edges and wear during opening and closing of the device and provides strain relief.
Other configurations of the described embodiments of the disclosure are part of the scope of this disclosure. For example, the principles of the disclosure may be applied to each individual user where each user may individually deploy such a system. This enables each user to utilize the benefits of the disclosure even if any one of the large number of possible applications do not need the functionality described herein. It does not necessarily need to be one system used by all end users. Accordingly, the appended claims and their legal equivalents should only define the disclosure, rather than any specific examples given.
