Electronic device restraint mechanism

ELECTRONIC DEVICE RESTRAINT MECHANISM

CROSS-REFERENCE TO A RELATED APPLICATION

[0001] The present application claims the benefit of, and incorporates by reference, provisional application Serial No. 60/916,557, filed May 7, 2007, and entitled “Two-Stage Security Lock for Notebook Docking Station.” BACKGROUND

[0001] Portable devices, such as notebook computers, are susceptible to theft. Various locking mechanisms may be available by which such portable devices can be physically restrained to structures, such as docking stations, furniture, etc. Such restraint and locking mechanisms occupy space which is at a premium in portable devices.

BRIEF DESCRIPTION OF THE DRAWINGS

[0002] For a detailed description of exemplary embodiments of the invention, reference will now be made to the accompanying drawings in which:

[0003] Figure 1 shows an illustrative notebook computer resting on top of a docking station, in accordance with various embodiments;

[0004] Figure 2 shows the notebook computer of Figure 1 in locking engagement with the docking station, in accordance with various embodiments;

[0005] Figure 3 shows an illustrative embodiment of a portion of the docking station, in accordance with various embodiments;

[0006] Figure 4 shows an illustrative ejector mechanism, in accordance with various embodiments;

[0007] Figures 5 and 6 show different views of an illustrative sliding member, in accordance with various embodiments;

[0008] Figures 7 and 8 show an illustrative locking mechanism in an unlocked position, in accordance with various embodiments; and

[0009] Figure 9 illustrates the locking mechanism of Figures 7 and 8 in a locked position, in accordance with various embodiments.

NOTATION AND NOMENCLATURE

[0010] Certain terms are used throughout the following description and claims to refer to particular system components. As one skilled in the art will appreciate, computer companies may refer to a component by different names. This document does not intend to distinguish between components that differ in name but not function. In the following discussion and in the claims, the terms “including” and “comprising” are used in an open-ended fashion, and thus should be interpreted to mean “including, but not limited to... Also, the term “couple” or “couples” is intended to mean either an indirect, direct, optical or wireless electrical connection. Thus, if a first device couples to a second device, that connection may be through a direct electrical connection, through an indirect electrical connection via other devices and connections, through an optical electrical connection, or through a wireless electrical connection. A “docking station” may broadly be defined as any apparatus to which a computer (e.g., a notebook computer or laptop computer) may couple. In some embodiments, a “docking station” may be defined as a base into which laptop/notebook computers may be plugged when at a fixed location. In some embodiments, a “docking station” may be defined as a receptacle for a portable computer that allows the computer to connect to accessories such as monitors and keyboards when used as a desktop computer. Other well-known definitions for “docking stations” also may be used.

DETAILED DESCRIPTION

[0011] Disclosed herein are various embodiments of a locking mechanism that can be used to physically restrain portable devices (e.g., notebook computers, docking stations) to immovable or difficult-to-move structures (e.g., furniture), thereby preventing theft of the portable devices. The disclosed embodiments are advantageous at least because of their conservative use of portable device real estate.

[0012] Figures 1 and 2 show an illustrative notebook computer 10 resting on top of a docking station 12. In turn, the docking station 12 rests on top of a surface such as a table 14. The table 14 comprises one or more legs 16 or other structures by which the docking station may be restrained. In other embodiments, the clocking station 12 may rest on top of other types of immovable or difficult-tomove objects, including desks, computer anchors, walls, various types of furniture, etc.

[0013] The docking station 12 comprises a sliding member 20. In some embodiments, the sliding member 20 comprises a switch having a useraccessible surface that protrudes beyond a surface 13 of the docking station 12. The sliding member 20 may be of any suitable shape (e.g., a rectangular prism) and size (e.g., between 0.5cm and 3cm in length, between 0.25cm and 2cm in height and between 0.25cm and 6cm in depth). The sliding member 20 can be slid in the direction of arrow 21 from an unlocked position (U) to a locked position (L). When the sliding member 20 is in the locked position, the notebook computer 10 is locked to the docking station and cannot be removed without damaging the computer and docking station. In accordance with various embodiments, the sliding member 20 is maintained in the locked position L by action of a docking station lock 23, shown in Figure 2. The lock 23 is inserted into slot 22 and turned, for example, with a key. The lock 23 couples to a cable 25 which, in turn, couples to any suitable, immovable (or difficult-to-move) object, such as leg 16 of the table 14. In this way, the lock 23 locks the docking station 12 to the table 14 and also prevents the sliding member 20 from returning to the unlocked position U. By maintaining the sliding member 20 in the locked position L, the notebook computer 10 is locked to the docking station. One lock (23) thereby performs two locking functions: the locking of the notebook computer 10 to the docking station 12, and the locking of the docking station 12 to the table 14.

[0014] Figure 3 shows an interior view of a portion of the docking station 12. The view in Figure 3 is oriented as indicated by arrows 11 in Figures 1-3. The sliding member 20 is shown in the upper left-hand portion of the figure. An ejector bar 30 is also shown. As described in detail below, the ejector bar 30 slides to the left (i.e., in the direction of arrow 31) to cause the notebook computer 10 (not specifically shown in Figure 3) to be ejected (e.g., pushed away) from the docking station 12.

[0015] Figure 4 shows another view of the ejector bar 30. The ejector bar 30 is caused to slide to the left (i.e., in the direction of arrow 31) by an end-user forcing ejector push member 32 to the right (in the direction of arrow 33). The ejector bar 30 and ejector push member 32 couple together by member 36. Member 38 couples to ejector bar 30 and to another ejector bar not shown in Figure 4. Member 38 pivots about pivot point 40. When ejector push member 32 is pushed in the direction of arrow 33, the ejector bar 30 is forced to move in the direction of arrow 31. The ejector bar 30 comprises one or more hooks 47 that catch a bottom surface of the notebook computer 12 (e.g., using one or more corresponding orifices on the bottom surface of the notebook computer 12). The ejector bar 30 also comprises one or more plungers 50. As the ejector bar 30 is moved in the direction of the arrow 31, the hooks 47 pull back slightly to release from the notebook computer 12. As the ejector bar 30 is forced further in the direction of the arrow 31, the plungers 50 are forced upward by ramps 52 (no plunger is shown at the left-most plunger ramp 52). The upward force of the plungers pushes against the notebook computer 12, thereby separating the notebook computer 12 from the docking station.

[0016] Figures 5 and 6 show top and bottom views, respectively, of the sliding member 20. The sliding member 20 comprises a transverse post 67 and a pair of vertical posts 65 and 68 protruding downward from the bottom of the sliding member 20. The transverse post 67 and vertical posts 65 and 68 may be of any suitable shape (e.g., cylindrical) and size (e.g., with radii between 1 mm and 5 mm and lengths between 5 mm and 40 mm).

[0017] Figure 7 illustrates the sliding member 20 engaging a locking bracket 75. The locking bracket 75 comprises an angled cam groove 77 in which the bottom end of the post 65 resides. As the sliding member 20 is slid to the right (in the direction of arrow 79), the rightward motion of post 65 in angled cam groove 77 forces the locking bracket 75 in an orthogonal direction, as indicated by arrow 81. A spring 70 is disposed on transverse post 67 to apply pressure in the direction opposite the direction identified by arrow 79. Spring 70 causes the sliding member 20 to naturally reside in the unlocked position U. The angled cam groove 77, in some embodiments, is of an oval shape, has a length of between 4 mm and 20 mm and a depth of between 2 mm and 8 mm.

[0018] Figure 8 illustrates a bottom view of sliding member 20, ejector bar 30, locking bracket 75 and stop member 90. The stop member 90 comprises an angled stop surface 92 and a spring 95. The angled stop surface 92 may be of a substantially triangular shape or of a quadrilateral shape with all but one side parallel and/or perpendicular to the other sides. The size of the angled stop surface 92 ranges between 15 sq. mm and 45 sq. mm. The lock 23 (shown in Figure 2) is inserted at slot 22. When inserted, the lock 23 causes the stop member 90 to slide in the direction of arrow 94. When the lock 23 is removed, spring 95 forces the stop member 90 in the direction opposite that of arrow 94. The placement of stop member 90 is in an unlocked position. The ejector bar 30 is free to move left and right as needed to lock and eject the notebook computer 10 to/from the docking station 12.

[0019] Figure 9 illustrates the stop member 90 in a locked position due to the action of lock 23 (shown in Figure 2). Spring 95 is compressed. When the stop member 90 is pushed into the position shown in Figure 9, the post 68 from the sliding member is at position 100. As the end-user slides the sliding member 20 (using, for example, a finger) in the direction of arrow 21, the post 68 moves from position 100 to position 102. In so moving from position 100 to position 102, the post 68 pushes against angled stop surface 92, which forces the stop surface 92 upward in the direction of arrow 101. This action further compresses spring 95. When the post 68 is pushed to position 102, the angled stop surface 92 is forced downward by the action of spring 95. The left edge 105 of angled stop surface 92 prevents the post 68 from returning back to position 100. The sliding member 20 is then locked in locking position L.

[0020] The action of forcing the sliding member 20 in the direction of arrow 21 causes locking bracket 75 to move downward in the direction of arrow 81, as explained above. Because the sliding member 20 becomes locked in locking position L, the locking bracket 75 also becomes locked in the position illustrated in Figure 9. The bottom portion 110 of the locking bracket 75 thereby provides a locking surface that prevents the ejector bar 30 from moving to the right in the direction of arrow 103. Because the ejector bar 30 cannot move in the direction of arrow 103, the hooks 47 do not disengage and the plungers 50 are not pushed upward. Accordingly, the notebook computer 10 is locked in place on docking station 12 until the lock 23 is removed. Removal of lock 23 permits the various aforementioned pieces to return to their unlocked states, which then permits full use of the ejector bar 30. When the lock 23 is removed, spring 111 returns locking bracket 75 back to its unlocked position, as shown in Figure 8.

[0021] The above discussion is meant to be illustrative of the principles and various embodiments of the present invention. Numerous variations and modifications will become apparent to those skilled in the art once the above disclosure is fully appreciated.