BRIEF DESCRIPTION OF THE DRAWINGS

[0001] FIGS. 1A-1C illustrate perspective views of an example device that includes a sequential multi-axis hinge assembly in accordance with some implementations.

[0002] FIGS. 2A-2D illustrate assembled and exploded views of an example sequential multi-axis hinge assembly in accordance with some implementations.

[0003] FIGS. 3A-1 through 3B-9 illustrate cross sectional views of an example sequential multi-axis hinge assembly in closing and opening scenarios in accordance with some implementations.

[0004] FIGS. 4A-4C illustrate cross sectional views of an example friction band example in accordance with some implementations.

DETAILED DESCRIPTION

[0005] Some computing devices, such as a tablet or a touch screen device, can be used for a variety of purposes including displaying books, interacting with applications, browsing the Internet, reading email, or other similar activities. For certain applications, more processing power and input capabilities are desired. Input devices, such as keyboards, can be attached to tablet devices to allow additional interactions, such as, editing documents, filling in forms, composing emails, and other similar activities. The attachment of input devices, such as a keyboard, can enable tablet-style computing devices to provide convenience similar to a laptop and enable lap-top style computing devices to have flexibility similar to a tablet. In these scenarios, a first device portion, such as a display can be removeably rotatably coupled to a second device portion, such as another display and/or an input device. A manner in which the first and second portions are removeably rotatably coupled can enhance or diminish the user experience. For instance, if the device tips backwards when the user tries to use it, the user experience is diminished. Further, in touch display scenarios, the user experience can be diminished if the touch display bounces when the user touches it. Toward these ends, some of the present implementations relate to sequential multi-axis hinge assemblies that rotatably couple the device portions and that can reduce device tipping and/or reduce display bounce, among other advantages.

[0006] FIGS. 1A-1C collectively illustrate an example computing device (e.g., device) 100 that can include a first portion 102 and a second portion 104 rotatably secured together by a sequential multi-axis hinge assembly 106. In some examples, the first portion 102 may be a tablet device having a touch screen 108 (shown cut-away) and the second portion 104 may be an input device and/or include an input device 110 (shown cut-away).

[0007] In an example, the input device 1 10 can be a keyboard 112. Other implementations can employ other input devices, for instance, a touch screen can function as an input device (e.g., display a virtual keyboard). The device 100 can also include computing elements 1 14 (illustrated relative to FIG. IB) such as a processor, memory/storage, a battery, and/or a video or graphics processor, among other components/elements. These computing elements may be positioned in the first portion 102 and/or second portion 104.

[0008] The sequential multi-axis hinge assembly 106 can include articulating hinge covers (e.g., hinge covers 1 16) that can obscure and/or protect the underlying elements. The hinge covers are removed starting at FIG. 2A to facilitate illustration of the underlying elements.

[0009] FIG. 1 A shows the computing device 100 in a closed position or orientation from a "front" view of the computing device 100. In the closed orientation, each hinge of the sequential multi-axis hinge assembly 106 is rotated to its individual fully closed orientation to position the first portion 102 over the second portion 104. In an example shown in FIG.

IA, in the closed orientation, the second portion 104 can be configured to be positioned on a generally horizontal surface such as a table top, and the first and second portions 102 and 104 may be generally parallel to one another and the horizontal surface (e.g., the first portion 102 is juxtaposed over the second portion 104).

[0010] In the closed orientation, the first portion 102 and the second portion 104 may be at a rotational angle of approximately zero degrees relative to each other; however, this closed angle may be more or less depending on the particular hinge assembly implementation. For example, a device may have a closed angle of around negative two to negative five degrees.

[0011] FIG. IB shows the computing device 100 in an open or deployed position. In the open position, the first portion 102 and the second portion 104 may be at an obtuse angle a relative to each other to enable interaction with the first portion 102.

[0012] Note that the mass of various components, such as computing elements 1 14 can affect the stability of the device in various orientations. For instance, computing elements 114(3), 114(4), and 1 14(5) can move the center of mass as the first and second portions are rotated from the closed orientation of FIG. 1A to the deployed or open orientation of FIG.

IB. To address this issue and avoid tipping, the sequential multi-axis hinge assembly 106 may provide a foot 118 in the deployed orientation that may increase the stability of the computing device 100 and/or reduce the likelihood of the computing device 100 tipping over backward in the deployed position from the mass of components in the first portion 102. The foot 1 18 can increase a footprint f of the device. For instance, compare the footprint f _c in the closed orientation of FIG. 1A to the deployed footprint fd of FIG. IB. Thus, the sequential nature of the sequential multi-axis hinge assembly 106 may create the foot 118 in the deployed position that can help stabilize the computing device 100 and decrease tipping (e.g., maintain the center of mass over the footprint).

[0013] FIG. 1C shows the computing device 100 in a detached state. In some examples, the sequential multi-axis hinge assembly 106 can be secured to the first portion 102 and the second portion 104 in a relatively permanent manner via a fastening component (e.g., in a manner that is not intended to be readily separable by an end user). Alternatively, the sequential multi-axis hinge assembly 106 can be secured to the first portion 102 and the second portion 104 in an attachable/detachable manner as shown in Figure 1C.

[0014] In an example implementation, the sequential multi-axis hinge assembly 106 may include one or more protrusions 120, or fangs, configured to engage with one or more receptacles of the first portion 102 to attach the sequential multi-axis hinge assembly 106 to the first portion 102. The protrusions 120 may be configured to engage with receptacles (not shown) of the first portion 102 via a latch mechanism or via a magnetic mechanism enabling a quick and easy attach/detach mechanism for an end user. Other attach/detach assemblies may also be contemplated. Similarly, the sequential multi-axis hinge assembly 106 may attach to the second portion 104 by similar permanent or detachable means as described above.

[0015] Alternatively, or additionally to the mechanical coupling described above, the quick attach/detach assembly can enable electronic components of the first portion 102 and the second portion 104 to attach and detach in order to electrically couple processor, storage/memory, and/or battery from the first portion 102 to the graphics processor and/or keyboard in the second portion 104, for example.

[0016] Thus, the quick attach/detach assembly can allow the user to be able to detach the first portion 102 or the second portion 104 to use either portion independent of the other. For example, the first portion 102 may be operated as a stand-alone tablet device, and then may be attached to second portion 104, via sequential multi-axis hinge assembly 106, allowing the computing device 100 to function similar to a laptop device. Additionally, a user may also be able to exchange the first portion 102 or the second portion 104 for application-specific devices. For example, an individual second portion 104 may include a keyboard and/or a touchscreen. In certain scenarios, the user may attach a first touchscreen as the first portion 102 and a second touchscreen as the second portion 104, and utilize the computing device 100 like a book. In other scenarios, the user may attach a touchscreen as the first portion 102 and an input device, manifest as a keyboard and trackpad, as the second portion 104, and utilize the computing device 100 like a laptop. Other configurations and implementations may be contemplated.

[0017] FIGS. 2A-2C collectively show another example sequential multi-axis hinge assembly 106A. In this case, the sequential multi-axis hinge assembly 106A includes a pair of hinge sets 202 that are spaced apart and covered by hinge covers 1 16 (shown in FIG. 2 A, shown in ghost in FIG. 2B, removed in FIG. 2C). Individual hinge sets 202 can include multiple hinge frames 204. (Note that due to space constraints on the drawing pages, not all elements are labeled in each figure, and not every instance of every element is labeled, rather representative elements are labeled.) Individual hinge frames 204 can define shaft enclosures 206 that can receive hinge shafts or hinge pins 208. Individual shaft enclosures 206 can be aligned with shaft enclosures 206 of adjacent hinge frames 204 to receive a hinge shaft and form a hinge 210 that rotates around a hinge axis 212 defined by the hinge shaft 208. For instance, shaft enclosure 206(1) of hinge frame 204(1) fits between shaft enclosures 206(2)A and 206(2)B of hinge frame 204(2) to receive hinge shaft 208(1) to form hinge 210(1). Similarly, shaft enclosure 206(2)C of hinge frame 204(2) fits between shaft enclosures 206(3 )A and 206(3)B of hinge frame 204(3) to receive hinge shaft 208(2) to form hinge 210(2). The sequential multi-axis hinge assembly 106A can also include sequencing assemblies 214 that can control the relative order that rotation occurs around individual hinge axes 212 under specific conditions, such as opening or closing. In this example the sequencing assemblies 214 can include friction band 216, timing cam 218, shuttle cam 220, first portion timing cam 222, spacer 224, and/or end caps 226.

[0018] Friction bands 216 can be secured to respective hinge frames 204. The hinge shafts 208 can pass through respective friction bands and the friction bands can provide resistance to rotation of the hinge shafts. Stated another way, the friction bands can function as a friction interface between the hinge frames to provide an arresting force for the attached device. That is, the friction bands 216 may be undersized relative to a hinge shaft diameter, and the hinge shaft 208 may cause the friction band 216 to expand when the friction band 216 is inserted over the hinge shaft 208. An amount of friction may be adjusted by factors such as a thickness and length of the friction band 216, the diameter of the hinge shaft 208, a type of grease used, and/or other known friction technologies. Various types of friction bands 216 may be contemplated. Further, in some implementations the friction bands can supply a uniform friction force (e.g., resistance) to the hinge shaft for the range of rotation of the hinge shaft. In other implementations, the friction bands can supply a non-uniform resistance (e.g., varying friction force). For instance, with a hinge shaft that has a range of rotation of 30 degrees, the friction force could be greater from zero degrees to 10 degrees than from 10 degrees to 30 degrees. One such example can be seen in FIG. 2D where the friction band 216A(1) has both high areas 228 and low areas 230. The high and low areas can bias the hinge shaft toward specific orientations. For instance, features on the outwardly facing surface of the hinge shaft 208 could be biased toward the low areas because less friction is encountered at the low areas compared to the high areas. Further, in some implementations, the friction force can be the same in both directions of rotation. In other implementations, the friction force can be different for opening rotation than for closing rotation. For instance, the friction force could be lower for opening rotation (e.g., when the user opens a device that is in the closed orientation) and relatively higher for closing rotation (e.g., when the user closes a device in the open or deployed orientation). A further example that illustrates these aspects is shown and described below relative to FIGS. 4A-4C.

[0019] As mentioned, sequencing assemblies 214 can control the relative order of rotation around the hinge axes 212. The sequencing assemblies 214 can also control an extent of rotation (e.g., number of degrees or radians of rotation) around individual hinge axes 212. In this case, the extent of rotation can be controlled by interactions of adjacent hinge frames 204. For instance, FIG. 2B shows how the interaction of hinge frame 204(1) with hinge frame 204(2) can define an angle of rotation or range of rotation 232 around hinge axis 212(1). The angle of rotation around the individual hinge axes can collectively define the angle of rotation of the sequential multi-axis hinge assembly 106A.

[0020] The sequential multi-axis hinge assembly 106A can also include shuttle guides 234 (FIG. 2D) that can prevent rotation of the shuttle cam 220 around the corresponding hinge shaft 208 while allowing the shuttle cam to move orthogonally to the hinge shaft 208. In this example, the shuttle guides are implemented as tabs or rails 236 that ride or slide in slots 238. In this case, the rails 236 are formed on the shuttle cams 220 and the slots 238 are formed in the friction bands 216. However, other configurations are contemplated. For instance, the rails could be formed in the friction bands and the slots could be formed in the shuttle cams, for example.

[0021] FIGS. 3A-1 through 3A-9 and FIGS. 3B-1 through 3B-9 collectively show how sequencing assemblies 214A and 214B, respectively, can collectively control the rotation sequence of sequential multi-axis hinge assembly 106A. FIGS. 3A-1 through 3A-9 show views through shuttle cam 220A(1), timing cam 218A(1), shuttle cam 220A(2), and first portion cam 222A(1). FIGS. 3B-1 through 3B-9 show views through timing cam 218B(1), shuttle cam 220B(1), and timing cam 218B(2).

[0022] Looking at FIG. 3A-1, shuttle cam 220A(1), timing cam 218A(1), shuttle cam 220A(2), and first portion cam 222A(1) each define an aperture 300A through which the respective hinge shafts 208 extend. Further, hinge frame 204(1) defines a cam recess 302 and shuttle cam 220A(1) defines cam lobes 304(1) and 304(2). The timing cam 218A(1) defines cam lobe 306 and cam recesses 308(1) and 308(2). Shuttle cam 220A(2) defines cam lobes 310(1) and 310(2) and first portion cam 222A(1) defines cam lobe 312 and cam recess 314. To avoid clutter on the drawing pages not all of these elements are specifically designated in each of FIGS. 3A-2 through 3A-9.

[0023] Looking at FIG. 3B-1, timing cam 218B(1), shuttle cam 220B(1), timing cam 218B(2) and hinge frame 204(4) can each define apertures 300B through which the respective hinge shafts 208 extend. Timing cam 218B(1) can define a cam recess 316. (In the illustrated implementation, all of the timing cams can have the same profile to reduce the number of different elements in the device. As such, timing cam 218B(1) can also define another cam recess and a cam lobe which are shown but not designated). Shuttle cam 220B(1) can define cam lobes 318(1) and 318(2). Timing cam 218B(2) can define cam recess 320 as well as cam lobe 322 (and another shown but not designated cam recess).

[0024] Looking at FIGS. 3A-1 and 3B-1, in this implementation, the hinge shafts 208 have a keyed configuration. In this example, the hinge shafts are keyable in that the hinge shafts have a "D" shaped configuration when viewed orthogonal to the hinge axis 212. The cams can have a corresponding "D" shaped aperture to prevent rotation of the cams around the respective hinge shaft. For instance, hinge shaft 208(1) is "D" shaped and aperture 300B(1) of timing cam 218B(1) is "D" shaped so that the hinge shaft and the timing cam rotate together. Other key shapes are contemplated. For instance, the hinge shafts could have a star shaped configuration that matches star shaped apertures. Note further, that shuttle cams 220 A(l), 220A(2), and 220B(1) have elongate apertures 300A(1), 300A(2), and 300B(2). The elongate apertures allow the shuttle cams to move orthogonally relative to the hinge shafts 208(1), 208(2), and/or 208(3). For instance, as labeled relative to shuttle cam 220A(1), a width of hinge shaft 208(1) is indicated as wi and a width of aperture 300A(1) in the shuttle cam is indicated as W2. A different between the width of the aperture and the width of the hinge shaft (w2-wi) can define an extent of lateral movement of the shuttle cam relative to the hinge shaft. This aspect works cooperatively with the shuttle guide (234A(1), FIG. 2D) to define movement of the shuttle cam. Recall that the discussion above relative to FIG. 2D explained how the shuttle cams can move orthogonally on the rails and slots, but cannot rotate.

[0025] Functional aspects of how sequencing assemblies 214A and 214B can control the sequence of rotation of the sequential multi-axis hinge assembly 106A are now explained starting with FIGS. 3A-1 and 3B-1. These FIGS, show the sequential multi-axis hinge assembly 106A in the fully open or deployed position similar to FIG. IB. Assume for purposes of explanation that a user is applying a force as indicated by arrow 324 to close the device similar to FIG. 1 A. Looking at sequencing assembly 214A, rotation around hinge shaft 208(1) is blocked by shuttle cam 220A(1). In this instance, the shuttle cam' s cam lobe 304(1) is engaged in cam recess 302 on the hinge frame 204(1). The shuttle cam 220A(1) is blocked from moving laterally (e.g., orthogonally to the hinge axis) by cam lobe 304(2) engaging cam lobe 306 of timing cam 218A(1).

[0026] Sequencing assembly 214B blocks rotation around hinge shaft 208(2). The hinge shaft 208(2) passes through shuttle cam 220B(1). This shuttle cam 220B(1) is blocked from rotation by cam lobe 318(1) engaging cam recess 316 in timing cam 218B(1). Further, the shuttle cam 220B(1) cannot move laterally away from timing cam 218B(1) because cam lobe 318(2) is engaging cam lobe 322 of timing cam 218B(2). Returning to sequencing assembly 214A, shuttle cam 220 A(2) and hence hinge shaft 208(3) cannot rotate. Specifically, cam lobe 310(1) of shuttle cam 220A(2) is engaging cam recess 308(2) of timing cam 218A(1). The shuttle cam 220 A(2) cannot move away from timing cam 218A(1). Thus, counter-clockwise rotation responsive to force 324 can only occur at hinge shaft 208(4).

[0027] FIGS. 3A-2 and 3B-2 show sequential multi-axis hinge assembly 106A after about thirty degrees of rotation around hinge shaft 208(4). At this point, rotation around hinge shaft 208(4) can be stopped by contact between adjacent hinge frames as shown at 232 of FIG. 2B. Note however, in relation to sequencing assembly 214A, that cam lobe 312 of first portion cam 222A(1) is no longer opposing cam lobe 310(2) of shuttle cam 220A(2). Instead, cam recess 314 is aligned with cam lobe 310(2). As such, shuttle cam 220A(2) is free to move laterally toward first portion cam 222A(1) and away from timing cam 218A(1). The movement can occur because of the elongate shape of aperture 300A(3) relative to hinge shaft 208(3). Rotation around hinge shafts 208(1) and 208(2) remains blocked for the reasons described above relative to FIGS. 3A-1 and 3B-1. Relative to hinge shaft 208(2), shuttle cam 220B(1) is blocked from rotation by cam lobe 318(1) engaging cam recess 316 in timing cam 218B(1). Further, the shuttle cam 220B(1) cannot move laterally away from timing cam 218B(1) because cam lobe 318(2) is engaging cam lobe 322 of timing cam 218B(2).

[0028] FIGS. 3A-3 and 3B-3 show a subsequent instance where shuttle cam 220A(2) has moved laterally toward first portion cam 222A(1) and away from timing cam 218A(1). The sequential multi-axis hinge assembly 106A (e.g., shuttle cam 220A(2)) is now able to rotate counter-clockwise around or with hinge shaft 208(3). Note that this rotation of shuttle cam 220A(2) rotates the shuttle cam's cam lobe 310(1) away from the cam recess 308(2) of timing cam 218A(1) in sequencing assembly 214A. Further, in sequencing assembly 214B, the counter-clockwise rotation around hinge shaft 208(3) rotates cam lobe 322 of timing cam 218B(2) away from cam lobe 318(2) of shuttle cam 220B(1). Now cam recess 320 of timing cam 218B(2) is proximate to cam lobe 318(2) of shuttle cam 220B(1). Thus, at this point shuttle cam 220B(1) is now free to move laterally (e.g., left to right on the drawing page) relative to hinge shaft 208(2).

[0029] FIGS. 3A-4 and 3B-4 show a subsequent instance where in sequencing assembly 214B the shuttle cam 220B(1) has moved laterally on hinge shaft 208(2) toward timing cam 218B(2) and away from timing cam 218B(1). The shuttle cam's cam lobe 318(2) is now engaging the timing cam' s cam recess 320 and cam lobe 318(1) has vacated cam recess 316 and as such, the shuttle cam 220B(1) and hinge shaft 208(2) are able to rotate counterclockwise. Note that this rotation of hinge shaft 208(2) also rotates timing cam 218A(1) of sequencing assembly 214A. Recall by comparing FIG. 3A-3 to FIG. 3A-4 that prior to this rotation, shuttle cam 220A(1) was blocked from rotation because cam lobe 306 of timing cam 218A(1) kept the shuttle cam' s cam lobe 304(1) engaged with cam recess 302 in hinge frame 204(1). Now with the rotation of timing cam 218A(1) cam recess 308(1) is now aligned with cam lobe 304(2), which allows the shuttle cam 220A(1) to be able to move laterally relative to hinge shaft 208(1).

[0030] FIGS. 3A-5 and 3B-5 show a subsequent point where shuttle cam 220A(1) has moved laterally to the right on hinge shaft 208(1) to allow counter-clockwise rotation of hinge shaft 208(1), shuttle cam 220A(1), and timing cam 218B(1). At this point, rotation around each of the hinge shafts 208 in the counter-clockwise direction is complete and the sequential multi-axis hinge assembly 106A is in the closed position.

[0031] Assume at this point, the user wants to open the device and applies a force 324(1) to open the sequential multi-axis hinge assembly 106A. Shuttle cam 220A(1), timing cam 218B(1), and hinge shaft 208(1) are free to rotate clockwise. However, in sequencing assembly 214A, cam lobe 304(2) of shuttle cam 220A(1) is engaging cam recess 308(1) of timing cam 218A(1) thereby blocking clockwise rotation relative to hinge shaft 208(2). Similarly, relative to sequencing assembly 214B, cam lobe 318(2) of shuttle cam 220B(1) is engaging cam recess 320 of timing cam 218B(2) to prevent rotation relative to hinge shaft 208(3). Returning to sequencing assembly 214A, cam lobe 310(2) of shuttle cam 220A(2) is engaging cam recess 314 first portion cam 222A(1) to prevent rotation relative to hinge shaft 208(4). Thus, at this point, clockwise rotation is only possible at hinge shaft 208(1).

[0032] FIGS. 3A-6 and 3B-6 show sequential multi-axis hinge assembly 106A. At this point, in sequencing assembly 214A the cam lobe 304(1) of shuttle cam 220A(1) is now aligned with cam recess 302 in hinge frame 204(1). The shuttle cam is now free to move laterally (right to left on the drawing page) to an extent defined by the elongate configuration of the aperture 300A(1) compared to hinge shaft 208(1). Lateral movement of the shuttle cam 220A(1) will disengage the shuttle cam from timing cam 218A(1) and allow rotation around hinge shaft 208(2). Hinge shafts 208(3) and 208(4) remain constrained for the reasons described above relative to FIGS. 3A-5 and 3B-5.

[0033] FIGS. 3A-7 and 3B-7 show shuttle cam 220A(1) has vacated timing cam 218A(1) and moved left into cam recess 302, which allows clockwise rotation of hinge shaft 208(2), timing cam 218A(1) and shuttle cam 220B(1). Now, after the clockwise rotation cam lobe 318(1) of shuttle cam 220B(1) is aligned with cam recess 316 of timing cam 218B(1). The shuttle cam 220B(1) can now move orthogonally (e.g., laterally right to left) on hinge shaft 208(2).

[0034] FIGS. 3A-8 and 3B-8 show shuttle cam 220B(1) has vacated timing cam 218B(2) and moved left into cam recess 316 of timing cam 218B(l), which allows clockwise rotation of hinge shaft 208(3), timing cam 218B(2), and shuttle cam 220A(2). Now, after the clockwise rotation cam lobe 310(1) of shuttle cam 220A(2) is aligned with cam recess 308(2) of timing cam 218A(1). The shuttle cam 220A(2) can now move orthogonally (e.g., laterally right to left) on hinge shaft 208(3). This movement of the shuttle cam 220A(2) disengages cam lobe 310(2) from cam recess 314 of first portion cam 222A(1).

[0035] FIGS. 3A-9 and 3B-9 show first portion cam 222A(1), hinge shaft 208(4), and hinge frame 204(4) rotated clockwise until the sequential multi-axis hinge assembly 106A reaches the open position. The rotation could occur because shuttle cam 220A(2) disengages cam lobe 310(2) from cam recess 314 of first portion cam 222A(1) and moved laterally and engaged cam recess 308(2) in timing cam 218A(1) to allow the first portion cam to rotate. A full cycle of sequential closing rotation and sequential opening rotation has been described and the sequential multi-axis hinge assembly 106A is now back at the fully open orientation of FIGS. 3A-1 and 3B-1. Stated another way, the sequential multi- axis hinge assembly can control the sequence or order of rotation around individual hinge axes (e.g., hinge shafts). For example, hinge axis one, then hinge axis two, then hinge axis three, then hinge axis four in opening rotation and then hinge axis four, then hinge axis three, then hinge axis two, then hinge axis one in closing order. Further, the sequential multi-axis hinge assembly can define the range of rotation around the individual hinge axes and can block rotation around the other hinge axes until the range of rotation is complete.

[0036] The sequential nature of sequential multi-axis hinge assembly 106A is described relative to FIGS. 3A-1 through 3B-9. The discussion now returns to FIGS. 2B and 2C to note some of the structural features of sequential multi-axis hinge assembly 106A. As described above, the shuttle cams 220 can provide the sequencing aspect relating to the individual hinge shafts 208. Further, in some implementations, the shuttle cams can provide the sequencing aspect without interrupting the hinge shafts (e.g., the hinge shafts pass through the shuttle cams). This feature can allow the hinge shafts 208 and the hinge frames 204 to be co-extensive with one another and sharing common endpoints (e.g., co-terminus) as illustrated by being contained within a region R (FIG. 2B). This co-extensive and co- terminus configuration can offer structural advantages to the sequential multi-axis hinge assembly 106A. For instance, the sequential multi-axis hinge assembly 106A is less likely to flex and/or bounce when exposed to forces from the user, such as touching the display. Additionally, the shuttle cams allow hinge points of the sequential multi-axis hinge assembly 106A to be linearly arranged along a single straight line L (FIG. 2B). This configuration also contributes to a more robust multi-axis hinge that is less likely to flex or bounce than other designs. Note also, that while the illustrated implementation includes four hinge axes, the present concepts can be applied to implementations employing two, three, or more than four hinge axes.

[0037] FIGS. 4A-4C collectively show another implementation of friction band 216B(1) and hinge shafts 208(1) that are similar to the implementation illustrated in FIG. 2C. In this case, the friction band 216(1) defines a generally circular passageway 402 for the hinge shaft 208(1). However, the friction band 216(1) includes a region 404 that impinges within a diameter of the generally circular passageway 402. Also, an outer profile 406 of the hinge shaft is generally circular but includes a cut-away flattened region 408. The flattened region 408 can correspond to the region 404 of the friction band and thereby bias the friction band and hinge shaft to this orientation as seen in FIG. 4A. Further, in this implementation, a slight gap exists between the region 404 and region 408. This slight gap can allow a few degrees of relatively low resistance rotation as seen by comparing FIG. 4A to 4B (e.g., specifically at 410). Further rotation causes interference or engagement between region 404 and 408 as indicated at 412 of FIG. 4C. This engagement causes a force represented by arrow 414 that will cause a slight opening of the friction band 216(1) as indicated by arrow 416. Thus, this implementation can bias the hinge shaft 208(1) to specific orientations (e.g., FIG. 4A) and allow low resistance to rotation at some orientations (e.g., FIG. 4B) and higher resistance to rotation at other orientations (e.g., FIG. 4C). Other configurations of these aspects are contemplated beyond those illustrated in FIGS 2C, 2D, and 4A-4C.

[0038] The elements of the sequential multi-axis hinge assemblies can be formed of various materials utilizing various techniques. For instance, various metals may be employed, such as iron, steel, magnesium, zinc, titanium, and/or aluminum. The metals can be formed into specific shapes by machining, casting, metal injection molding, and/or 3D printing, among others. Other implementations can use other materials, such as polymers and/or composites, which also may be shaped in various ways, such as molding, machining, and/or 3D printing, among others.

[0039] The detailed description provided above in connection with the appended drawings is intended as a description of examples and is not intended to represent the only forms in which the present examples may be constructed or utilized.

[0040] References to "an example," "one implementation," "an implementation," "one example," "an example" and the like, indicate that the described, implementation or example may include a particular feature, structure or characteristic, but every, implementation or example may not necessarily include the particular feature, structure or characteristic. Moreover, such phrases are not necessarily referring to the same implementation or example. Further, when a particular feature, structure or characteristic is described in connection with an implementation or example, it is to be appreciated that such feature, structure, or characteristic may be implemented in connection with other implementations or examples whether or not explicitly described.

[0041] Although the subject matter has been described in language specific to structural features and/or methodological acts, it is to be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or acts described above. Rather, the specific features and acts described above are presented as example forms of implementing the claims.

[0042] Various device examples are described above. Additional examples are described below. One example includes a device that comprises first and second portions rotatably coupled by a set of hinge frames configured to rotate around individual frame axes defined by hinge shafts, individual hinge frames of the set of hinge frames including individual cams positioned over a respective hinge shaft. At least one individual cam comprises a shuttle cam that controls a relative sequence of rotation of the individual hinge frames by moving orthogonally to the respective hinge shaft.

[0043] Another example can include any of the above and/or below examples where other individual cams comprise timing cams and wherein the shuttle cam is positioned between two timing cams.

[0044] Another example can include any of the above and/or below examples where the shuttle cam defines an elongate aperture through which the individual hinge shaft passes and wherein the shuttle cam is configured to move orthogonally to the respective hinge shaft to an extent defined by the elongate aperture.

[0045] Another example can include any of the above and/or below examples where the shuttle cam includes rails that are received in recesses in individual cams adjacent to the shuttle cam and the rails and recesses limit rotation of the shuttle cam.

[0046] Another example can include any of the above and/or below examples where the shuttle cam comprises opposing first and second cam lobes.

[0047] Another example can include any of the above and/or below examples where at least two other cams comprise timing cams positioned on opposite sides of the shuttle cam.

[0048] Another example can include any of the above and/or below examples where a first of the timing cams comprises a first cam recess and a second of the timing cams comprises a second cam recess.

[0049] Another example can include any of the above and/or below examples where either the first cam lobe engages the first cam recess or the second cam lobe engages the second cam recess, but the first cam lobe does not engage the first cam recess at a same time that the second cam lobe engages the second cam recess.

[0050] Another example can include any of the above and/or below examples where the first cam recess and the second cam recess have a depth that is equal to a difference between a width of the respective hinge shaft and a width of an aperture of the shuttle cam that the respective hinge shaft passes through.

[0051] Another example can include any of the above and/or below examples where all of the individual hinge frames of the set of hinge frames and all of the hinge shafts are coextensive and co-terminus.

[0052] Another example can include any of the above and/or below examples where adjacent hinge frames define shaft enclosures through which an individual hinge shaft passes to form an individual hinge and wherein all hinges of the set of hinge frames are arranged along a straight line.

[0053] Another example can include any of the above and/or below examples further comprising friction interfaces that create resistance to rotation on individual hinge shafts.

[0054] Another example can include any of the above and/or below examples where the friction interfaces comprise friction bands through which individual hinge shafts pass.

[0055] Another example can include any of the above and/or below examples where the resistance is uniform through a range of rotation around the individual hinge shafts.

[0056] Another example can include any of the above and/or below examples where the resistance is the same in clockwise rotation and counter-clockwise rotation.

[0057] Another example can include any of the above and/or below examples where the resistance is different in clockwise rotation and counter-clockwise rotation.

[0058] Another example can include any of the above and/or below examples where the first portion comprises a display device and the second portion comprises an input device.

[0059] Another example can include a sequential multi-axis hinge assembly comprising a set of hinge frames configured to rotate around frame axes defined by hinge shafts. The sequential multi-axis hinge assembly further comprises a shuttle cam defining an elongate aperture through which an individual hinge shaft extends, the shuttle cam configured to move orthogonal to an individual frame axis on the individual hinge shaft to control an order of rotation around the individual frame axis and an adjacent individual frame axis.

[0060] Another example can include any of the above and/or below examples where the shuttle cam is configured to engage a cam recess associated with an adjacent individual hinge shaft to block rotation of the adjacent individual hinge shaft.

[0061] Another example can include a device comprising a set of hinges that rotate around a set of hinge shafts to couple a first portion to a second portion and a shuttle cam through which an individual hinge shaft passes, the shuttle cam configured to move orthogonally relative to the individual hinge shaft to block rotation of the individual hinge shaft or an adjacent individual hinge shaft.