Hyper-extendable friction hinge

Abstract

An exemplary hinge device includes a first hinge member and a second hinge member rotatably coupled together to form a range of rotation therebetween. When the members over-rotate outside the range of rotation into an over-extension zone, an over-extension mechanism applies an over-extension clamping force. The over-extension mechanism may include a cantilever or snap-fit ​​structure providing the clamping force. Frictional components may provide rotational resistance between the members during normal rotation, with a resistance torque less than that of the over-extension mechanism. Structural aspects include a partially cylindrical shell structure that partitions or encloses compartments within the device and allows passage of electrical FPC connectors. Mounting elements such as pins, holes, and alignment structures are used for mounting the device. Variable over-extension clamping force protects sensitive augmented reality glasses components from damage during managed over-extension while also accommodating an extended fit range. Lightweight construction minimizes mass contribution. The hinge device integrates smoothly into AR glasses, avoiding discomfort that could compromise the immersive experience.

Description

[0001] Cross-references to related applications

[0002] This patent application claims the benefit of priority to U.S. Provisional Patent Application No. 63 / 618,130 entitled “HYPEREXTENDABLE FRICTION HINGE”, filed January 5, 2024, by Chao et al., which is incorporated herein by reference in its entirety. Background Technology

[0003] Augmented reality (AR) glasses typically consist of a frame, temples, and optical components that allow the wearer to view augmented content. The frame houses optical components, such as waveguides and projectors, that blend virtual images with the wearer's real-world field of vision. The temples are hinged to the frame and extend backward to rest against the wearer's ears to support the glasses.

[0004] Uncontrolled hyperextension of the temples can negatively impact the viewing experience of enhanced content. For example, if the temples rotate excessively beyond their intended range of motion, the frame and optics may become misaligned or deformed. This can alter the axis along which projected light travels through the waveguide. Any deformation can misalign the waveguide and projector, causing distortion or other problems with the enhanced image.

[0005] Additionally, conventional AR glasses are designed for users with average head sizes. Users with larger or smaller heads may experience discomfort due to poor fit. Typical rigid frames and temples lack adjustability to accommodate different users. Temples may tend to overstretch if stretched excessively around a large head, or fail to reach the user's ears if stretched too small.

[0006] Therefore, uncontrolled hyperstretching will directly reduce the optical performance of AR glasses. Summary of the Invention

[0007] This disclosure relates to a hinge device with rotation and overextension capabilities. The hinge device includes a first hinge member and a second hinge member, which are rotatably coupled together to allow for a rotational zone between them. An overextension mechanism is configured to apply an overextension clamping force between the first and second hinge members when the first and second hinge members are over-rotated beyond the overextension zone of normal rotation. This protects the hinge from damage while enabling managed overextension to address some of the problems discussed above. The overextension mechanism is activated during excessive rotation between the members.

[0008] In one example, the super-extendable mechanism includes a cantilever or snap-fit ​​structure, such as a binder clip, bulldog clip, U-shaped structure, or C-shaped structure. The cantilever or snap-fit ​​structure conveniently provides super-extendable clamping force functionality.

[0009] Additionally, in some examples, the hinge may include a friction element to provide rotational resistance between the two hinge members during normal rotation. In some examples, the friction element may provide a smaller resistive torque than the clamping force or torque generated by the superextension mechanism, such that the superextension mechanism is not activated during normal rotation of the first and second hinge members, and is only activated when the first and second hinge members rotate excessively beyond the normal rotation zone or range.

[0010] Structurally, it includes a partially cylindrical shell structure to seal, enclose, or divide the compartments within the hinge mechanism. Mounting components such as pins, holes, and alignment parts are also provided for mounting the hinge mechanism to augmented reality glasses. Attached Figure Description

[0011] Figure 1 Example electronic devices are shown based on certain examples.

[0012] Figures 2A to 2B These are image views of hinge devices based on some examples.

[0013] Figures 3A to 3D This is a picture view of the first and second hinge members of a hinge device according to certain examples.

[0014] Figures 4 to 5 These are image views of hinge devices based on some examples.

[0015] Figures 6A to 6C The following are examples of hinge devices for accommodating flexible components.

[0016] Figures 7A to 7B It is based on some examples Figures 6A to 6C The image view shows the hinge mechanism mounted on the support arm 202 of the example AR glasses.

[0017] Figure 8 A flowchart of example operations in a method based on certain examples is shown. Detailed Implementation

[0018] Some examples in this article provide hinge mechanisms for AR glasses that allow for comfortable rotation while providing controlled hyperextension to minimize deformation of the frame and optics and protect sensitive display optics from damage due to excessive rotation. The hinge mechanisms can accommodate different head sizes while limiting rotation of the temples or arms within safe boundaries. These improvements can help maintain an undamaged augmented reality experience.

[0019] Figure 1 The diagram shows a perspective view of a head-mounted user device based on some examples, in which augmented reality (AR) glasses (e.g., AR glasses 100) are shown. AR glasses 100 are compact in size and have limited space available for internal components. In this example, AR glasses 100 can be worn to view augmented or virtual content displayed on top of real-world content visible in a content interaction system.

[0020] Figure 1 An exemplary AR glasses 100 includes a small frame 112 made of any suitable material, such as plastic or metal, including any suitable shape memory alloy as known in the field of ophthalmic eyewear. In one or more examples, the frame 112 includes a front member 138, which includes a first or left (when worn by a user) optics holder 122 (e.g., a display or lens holder) and a second or right (when worn by a user) optics holder 124, the left and right optics holders 122 and 124 being connected by a nose pad or bridge 130. The front member 138 additionally includes a left end portion 116 and a right end portion 118. A first or left optical element 126 and a second or right optical element 128 may be disposed within the respective left and right optics holders 122 and 124. Each of the right and left optical elements 128 may be a lens, a display, a display assembly, or a combination thereof. Any display assembly disclosed herein may be disposed in the AR glasses 100.

[0021] Frame 112 further includes a left arm or left temple 104 and a right arm or right temple 106, which are coupled to the respective left and right end portions 116 and 118 of the front member 138 by any suitable means, such as at folding hinges 144 (one folding hinge 144 on each side), to the front member 138 for coupling to the front member 138, or rigidly or otherwise secured to the front member 138 to become integral with the front member 138. In one or more implementations, each of the temple members 104 and 106 includes a first portion 114 coupled to the respective left or right end portion 116 or 118 of the front member 138, and any suitable second portion 136 for coupling to the user's ear. In some examples, the front member 138 may be formed from a single piece of material to have an integral or monolithic construction. In some examples, for example... Figure 1 As shown, the entire frame 112 can be formed from a single material to have an integral or monolithic construction.

[0022] As mentioned above, AR glasses typically also include optical components housed within the frame and temples that enable the wearer to view augmented content. The frame houses optical components, such as waveguides and projectors, that fuse virtual images with the wearer's real-world view. The temples connect to the frame at hinges and extend backward to rest against the wearer's ears to support the glasses. Uncontrolled overextension of the temples can negatively impact the viewing of augmented content. For example, if the temples rotate excessively beyond their intended range of motion, the frame and optics may become misaligned or deformed. This can alter the axis along which projected light travels through the waveguide. Any deformation can cause the waveguide and projector to become misaligned, resulting in distortion of the augmented image or other problems.

[0023] Furthermore, conventional AR glasses are designed for users with average head sizes. Users with larger or smaller heads may experience discomfort due to poor fit. Typical rigid frames and temples lack adjustability to accommodate different users. Temples may easily overstretch if stretched excessively around a large head, or fail to reach the user's ears if stretched too small. Therefore, uncontrolled overstretching can directly degrade the optical performance of AR glasses. These and other aspects will now be described with reference to some specific examples.

[0024] Reference Figures 2A to 2B An example hinge device 220 with rotation and super-extension functions is provided. The hinge device 220 can be mounted between the support arm 202 and the right arm 204 of the AR glasses 100, for example... Figure 3D and Figures 7A to 7B As shown. In some examples, the location is in Figure 1 The AR glasses 100 have folding hinges at or near point 144. Figure 1 The AR glasses 100 have a folding hinge 144, but can also be mounted on other glasses such as standard reading glasses or sunglasses. The support arm 202 can be provided as an integral extension of, for example, frame 214, but in other examples can be attached separately to frame 214. Frame 214 can include as described herein. Figure 1 The frame 112 has one or more features. The support arm 202 may carry navigation buttons 212 for users to browse augmented content viewed in the AR glasses 100, or to control one or more components of the AR glasses 100 as described below.

[0025] The hinge device 220 includes a first hinge member 206 and a second hinge member 208, which are rotatably coupled together at an arm rotation axis 210 to allow for a rotational zone between them. In some examples, the arm rotation axis 210 may be... Figure 1 The folding hinge 144 of the AR glasses 100 overlaps. These components can be seen more clearly and in magnified view in subsequent figures. An example arm rotation area 216 with approximately 90 degrees of rotation is shown, but other rotation areas are possible. The arm rotation area 216 may, for example, correspond to the opening or closing movement of the arm of the AR glasses 100.

[0026] As described in more detail below, the overextension element or mechanism 222 is configured to apply an overextension clamping force between the first hinge member 206 and the second hinge member 208 when the first hinge member 206 and the second hinge member 208 over-rotate at 217 into an overextension zone 218 beyond normal rotation. A visible overextension gap can be created between the end of the right arm 204 and the opposite end of the support arm 202, for example... Figure 2B At point 224. The overextension capability of the overextension mechanism 222 protects the hinge assembly 220 from damage while enabling managed overextension to address some of the potential optical distortion problems discussed separately above. The overextension mechanism 222 is activated when excessive rotation occurs between the hinge members and, in some examples, is configured to apply an overextension clamping force between the first hinge member 206 and the second hinge member 208 when the first hinge member 206 and the second hinge member 208 are excessively rotated relative to each other into the overextension zone 218. The overextension clamping force is further described below.

[0027] Back to Figure 1 The AR glasses 100 include a computing device, such as a computer 132, which can be of any suitable type to be carried by the frame 112 and, in one or more examples, has a suitable size and shape to be at least partially disposed in one of the temple members 104 and 106. In one or more examples, such as Figure 1As shown, the computer 132 is similar in size and shape to one of the temple pieces 106 (e.g., or temple piece 104), and is therefore almost entirely (if not completely) situated within the structure and boundaries of such temple piece 106. In one or more examples, the computer 132 is situated within both temple pieces 104 and 106, and flexible circuitry connecting the two parts of the computer 132 passes through one (or typically both) of the folding hinges 144. The computer 132 may include one or more printed circuit boards (PCBs) and one or more hardware processors with memory, wireless communication circuitry, and a power supply. In some examples, the computer 132 includes low-power circuitry, high-speed circuitry, and a display processor. Various other examples may include these elements in different configurations or integrated in different ways.

[0028] The computer 132 also includes a battery 110 or other suitable portable power supply. In some examples, the battery 110 is disposed in one of the temple members 104 or 106. Figure 1 In the AR glasses 100 shown, the battery 110 is shown disposed in the left temple 104 and electrically coupled to the remainder of the computer 132 disposed in the right temple 106 via a connector 134. The AR glasses 100 may include a connector or port (not shown) suitable for charging the battery 110 and accessible from the outside of the frame 112, a wireless receiver, a transmitter or transceiver (not shown), or a combination of such devices.

[0029] In one or more implementations, AR glasses 100 includes a camera device 102. Although two camera devices are depicted, other examples contemplate the use of a single or additional (i.e., more than two) camera devices. In one or more examples, in addition to camera device 102, AR glasses 100 also includes any number of input sensors or peripheral devices. The front element 138 is provided with an outward-facing, forward-facing, or front or outer surface 120 that faces forward or away from the user when AR glasses 100 is mounted on the user's face, and conversely, an inward-facing, rearward-facing, or rear or inner surface 108 that faces the user's face when AR glasses 100 is mounted on the user's face. Such sensors may include: an inward-facing video sensor or digital imaging module (e.g., a camera device), which may be mounted on the inner surface 108 of the front member 138 or disposed within the inner surface of the insert 138, or mounted in other positions on the frame 112 to face the user; and an outward-facing video sensor or digital imaging module (e.g., a camera device 102), which may be mounted on the outer surface 120 of the front member 138 or disposed within the outer surface of the insert 138, or mounted in other positions on the frame 112 to face away from the user.

[0030] Such sensors, peripherals, or accessories may additionally include biometric sensors, environmental condition sensors, light sensors, temperature sensors, position sensors, power monitors, or any other such sensors. In one or more implementations, the AR glasses 100 includes a track pad 140 or other touch or sensory input device to receive navigation commands from the user. One or more track pads 140 may be conveniently provided at one location for user interaction on one or both of the track pad 140 and the temple pieces 106.

[0031] In some examples, the PCB of computer 132 includes a flexible portion 146. In some examples, the flexible portion 146 is located at or adjacent to the folding hinge 144. More specifically, the flexible portion 146 may be located in an area on either side of the folding hinge 144 (or each folding hinge 144) or across an area of ​​the folding hinge 144 (or each folding hinge 144). For example, when the left arm 104 and right arm 106 of AR glasses 100 open and close, the flexible portion 146 adjacent to the folding hinge 144 may be subjected to a degree of bending, flexing, or movement. In some examples, the controlled hyperextension capability of hyperextension mechanism 222 protects the folding hinge 144 and flexible portion 146 of AR glasses 100 from damage, while enabling managed hyperextension to address some of the negative viewing issues discussed separately above.

[0032] Figure 3B A hinge device 220 according to some examples is shown. The hinge device 220 includes a first hinge member 206 and a second hinge member 208 (shown separately). Figure 3A In the first hinge member 206, the second hinge member 208 is rotatably coupled to the first hinge member 206 such that the second hinge member 208 can rotate relative to the first hinge member 206 within its normal or permissible rotation angle. The normal or permissible rotation angle may also be referred to as the rotation zone, for example... Figure 2B Example arm rotation zone 216 in the example.

[0033] In some examples, the first hinge member 206 is rotatably coupled to the second hinge member 208 at an arm rotation axis 210 defined by a pair of tubular bosses 324 carried by the second hinge member 208. Figure 3A An enlarged view of the second hinge member 208 is shown. Figure 3C The image shows a corresponding pin in a pair of pins 328 that rotatably secures the first hinge member 206 to the second hinge member 208 for each tubular boss 324.

[0034] In some examples, the first hinge member 206 includes a mounting portion comprising one or more alignment tabs 332 and screws 336 for example... Figure 3D The manner shown secures the first hinge member 206 (and thus the hinge assembly 220) to the support arm 202. Other alignment and securing features are also possible. In some examples, the second hinge member 208 also includes a mounting portion comprising one or more retaining tabs 338 and alignment holes 340 to secure the second hinge member 208 to the end of the arm of the AR glasses 100.

[0035] Therefore, in some examples, the hinge assembly 220 includes integrated mounting portions for secure mechanical coupling to the augmented reality glasses. These portions may include pins, holes, wall alignment structures, fasteners, or similar fasteners. A first hinge member is securely connected to a support arm or front frame member via its mounting portion. Simultaneously, a second hinge member is securely coupled to a rotating temple member. This interlocking mounting arrangement creates a skeleton for the rotation of the temple member relative to the frame. Specifically, the first mounting portion on the first hinge member engages with a corresponding second mounting portion on the AR glasses frame or housing. The resulting stable assembly can reliably withstand repeated temple adjustments during long-term use without loosening. Thus, the mounting portions provide a basis for smooth and controlled rotation of the hinge assembly 220 throughout the product lifecycle. They enable secure integration into the AR glasses 100 to support dynamic movement, thereby achieving customizable fit and optical alignment. The mounting configuration secures the hinge assembly 220 as a rotatable platform for AR experiences.

[0036] As mentioned above, in some examples, an overextended element or mechanism 222 is provided for the hinge device 220. Figure 4 In the example shown, the super-extension mechanism 222 is integrally formed with the second hinge member 208, but other arrangements, such as separate fittings or integrations, are possible. The super-extension mechanism 222 is configured to, during normal operation of the hinge device 220, for example when the right arm 204 (or Figure 1 The right arm or temple piece 106) and / or the left arm 206 (or Figure 1 As the left arm or temple 104 rotates within the entire arm rotation zone 216, a continuous clamping force is applied between the first hinge member 206 and the second hinge member 208. This normal rotation operation can occur, for example, between two positions: a first position in which the arm of the AR glasses 100 is folded inward against the frame in a closed or unused position, and a second position in which the arm of the AR glasses 100 is folded outward in an open or used position, in which, for example, the arm rests against the wearer's temple to view the augmented content in the AR glasses 100.

[0037] In some examples, the superextension mechanism 222 is also configured to rotate into a superextension region, such as those mentioned above, when the first hinge member and the second hinge member over-rotate relative to each other. Figure 2B When in the overextension zone 218, an overextension clamping force is applied between the first hinge member 206 and the second hinge member 208. In some examples, the overextension mechanism 222 is activated to apply the overextension clamping force during excessive rotation between the first and second hinge members. The overextension clamping force seeks to return the hinge assembly 220 to normal operating conditions (i.e., back to the arm rotation zone 216) while achieving managed overextension to mitigate some of the negative impacts on the optical components of the AR glasses 100 discussed above.

[0038] In some examples, as shown, the overextension element or mechanism 222 includes an elastic or "spring" snap-fit ​​structure having a triangular or "Δ" shape in the side or transverse view. Other shapes, such as "C" or "U" shapes in the side or transverse view or section, are possible. In some examples of the hinge device, the arm of the snap-fit ​​structure, which presents a C-shape or U-shape in the side view, serves as a cantilever element. This cantilever design can generate a clamping force when the hinge members are subjected to over-rotation into the overextension zone. As the first and second hinge members rotate beyond their normal range, the arm of the snap-fit ​​structure is forced to deflect, thereby generating a restoring force using the cantilever principle. This force acts in the opposite direction to the over-rotation, effectively clamping the hinge members together and resisting further overextension.

[0039] In some examples, the cantilever of the snap-fit ​​structure is carefully engineered to balance flexibility and rigidity. Upon entering the hyperextension zone, the inherent elasticity of the snap-fit ​​arms allows them to bend while maintaining structural integrity. This flexibility ensures that the arms can absorb and dissipate stress from excessive rotation, resulting in a clamping force that is both responsive and controlled. The result is a hinge mechanism that provides enhanced protection against potential overextension, which is helpful in the precision environment of augmented reality glasses where the alignment of optical components is crucial.

[0040] In some examples, the cantilever latch structure is designed to provide variable clamping force. This variability is helpful in some cases because it allows the hinge mechanism to accommodate different degrees of overextension, ensuring that the clamping force is proportional to the degree of over-rotation. The latch arm, acting as a cantilever beam, applies increasing clamping force as the overextension angle increases, thus providing progressive drag to protect the structural and functional integrity of the AR glasses.

[0041] In some examples, such as those shown, the snap-fit ​​structure holds the tubular boss 324 and the retaining tab 338 of the second hinge member 208 together without bias in the position shown during normal operation or rotation of the arm of the AR glasses 100, i.e., in contact with or closely adjacent to each other. In this version, the overstretch mechanism 222 does not generate, impose, or apply a continuous clamping force on the tubular boss 324 and the retaining tab 338. Only the inherent structural integrity of the resilient snap-fit ​​structure serves to provide a stable base or foundation for the arm rotation axis 210.

[0042] In some examples, the snap-fit ​​structure is used to bias the tubular boss 324 and the retaining tab 338 together even during normal operation or rotation of the arm. Here, the overextend mechanism 222 applies a continuous clamping force on these elements and seeks to increase the rigidity of the hinge assembly 220 and the stability of the arm rotation axis 210. The continuous clamping force is used to hold these elements together and increase the overall stability of the hinge assembly 220. In some examples, the continuous clamping force is along... Figure 3A The direction of the middle arrows 344 and 346 is considered. Offset or continuous clamping force in other directions is possible.

[0043] In either arrangement (normal bias or no bias), the increasing overstretch force applied to the arm of the AR glasses 100 can eventually be used at a threshold level to cause the tubular boss 324 and the fixing tab 338 of the second hinge member 208 to separate into the overstretch area. It should be recalled that the pin 328 secures the first hinge member 206 (attached to the support arm 202) to the second hinge member 208 (attached to the right arm 204) and transmits the applied overstretch force to the tubular bosses 324, forcing them spatially away from their respective fixing tabs 338 (i.e., forcing them to separate). This spatial movement deforms the snap-fit ​​structure of the overstretch mechanism 222 and causes an overstretch clamping force in the opposite direction. This opposite-direction overstretch clamping force also extends along... Figure 3A The directional action of the middle arrows 344 and 346.

[0044] In some examples, the snap-fit ​​structure of the super-extend mechanism 222 can be configured to provide a variable super-extend clamping force based on variations in the thickness or width of the snap-fit ​​structure of the super-extend mechanism 222. In some examples, the super-extend clamping force applied by the super-extend mechanism 222 is dynamic or variable based on the degree to which the first hinge member or the second hinge member enters the super-extend zone when the first hinge member and the second hinge member over-rotate relative to each other. For example, the further the tubular boss 324 and the fixing tab 338 are separated during a super-extend event, the greater the deformation of the resilient snap-fit ​​structure, causing the restoring super-extend clamping force generated by the super-extend mechanism 222 to increase dynamically and proportionally.

[0045] In some examples, the super-extension mechanism 222 applies a continuous clamping force between the first and second hinge members during normal rotation of the temple. This force increases the rigidity of the rotating hinge structure. The rigid base better supports the arm's rotation axis and the integrated electronics passing through the hinge mechanism.

[0046] During an overstretch event, the clamping force increases proportionally to the overrotation. For example, if the user overstretches the arm to accommodate an oversized head, the hinge components slightly separate. This causes the resilient snap-fit ​​structure of the overstretch mechanism to deform, thereby dynamically increasing its restorative clamping force.

[0047] Therefore, the variable overstretch clamping force prevents uncontrolled or damaging separation of the hinge components. It achieves managed flexibility while protecting the sensitive optics and electronics integrated throughout the AR glasses. Specifically, unrestricted overstretching could misalign waveguides or projectors in the frame, distorting the enhanced display. Or excessive rotation could damage the fragile flexible data wiring from the temples. By enabling the overstretch mechanism in case of excessive rotation, the hinge assembly avoids transmitting these excessive forces to the vulnerable display components. Thus, the variable but restorative clamping force protects both the durable hinge structure itself and the sensitive electronics within the AR glasses that enable an immersive user experience. In some examples, the continuous clamping force and / or overstretch clamping force generated by the hinge assembly ranges from 45 Newtons (N) to 350 N, and in some examples from 45 N to 85 N.

[0048] For more specific reference Figures 3C to 3D As can be seen, hinge device 220 includes a partially cylindrical shell structure 350, which is configured to seal or separate the first compartment from the second compartment during rotation between the first hinge member and the second hinge member. The partially cylindrical shell structure 350 can be seen more clearly in these views. The function of the partially cylindrical shell structure 350 is described in more detail in the following figures, which illustrate in detail how hinge device 220 is able to accommodate and protect the flexible cable passing through the folding hinge 144 of AR glasses 100 in some examples. In the examples shown, the partially cylindrical shell structure 350 is integrally formed with or integrally formed on the first hinge member 206, but other separate or integral arrangements are possible.

[0049] Reference Figure 3DIn some examples, the hinge device 220 includes a rotation limiter. Here, the arm of the snap-fit ​​structure includes or acts as a rotation limiter 354, which is configured to limit the rotation of the first hinge member 206 relative to the second hinge member 208 to a specific angular range within the normal rotation range before entering the overextension zone. When fully rotated (i.e., in...) Figure 3D (In a view that rotates downwards or clockwise), the rotation limiter 354 can act against the opposing surface 356 of the first hinge member 206 to limit or prevent further rotation of the first hinge member 206 relative to the second hinge member 208. At this rotational travel limit, the rotation limiter 354 enables or activates the operation of the overextension mechanism 222. In some examples, the rotation limiter 354 may include interacting protrusions and / or grooves located on the first hinge member 206 and the second hinge member 208, respectively.

[0050] Now refer to Figure 4 The image shows a picture view of an example hinge assembly 220 including a friction element 404. In the example shown, the friction element 404 is located in one or both tubular bosses 324, but other positions and arrangements are possible. The friction element 404 is configured to provide rotational resistance between the first hinge member 206 and the second hinge member 208 during normal operation (e.g., in the arm rotation zone 216). In some examples, the friction element 404 includes an element that is C-shaped in cross-section, as shown, which is inserted between the pin 328 and the tubular boss 324 to generate frictional and resistance torque between the two elements, and thus between the first hinge member 206 and the second hinge member 208. In some examples, the resistance torque of the friction element 404 is less than the resistance torque generated by the overextension clamping force of the overextension mechanism 222.

[0051] The hinge mechanism 220 therefore includes a friction element that provides rotational resistance between the first and second hinge members. In some examples, this friction element 404 is carefully adjusted or configured to produce smooth rotation of the temple members of the AR glasses 100 relative to the front frame 112. Specifically, the friction element 404 applies a resistance torque between the two hinge members. In some examples, this resistance torque is less than the resistance torque applied by the overextension mechanism. By keeping the resistance torque of the friction element low, excessive resistance to the rotation of the temple members during normal use is avoided. This allows the user to comfortably adjust the angle and position of the AR glasses.

[0052] Meanwhile, the presence of the friction component 404 prevents the temples from swinging too freely or wobbling uncontrollably. Unrestricted swinging can lead to poor alignment of the AR display components or an uncomfortable wearing experience. When the user rotates the temples relative to the frame of the AR glasses 100, the friction component 404 provides a smooth, controlled feel. This improves the overall usability and ergonomics of the AR glasses 100.

[0053] Now refer to Figure 5 The hinge assembly 220 is designed for integration into augmented reality glasses (e.g., AR glasses 100) intended for extended wear. Therefore, minimizing the size and weight of the component helps ensure user comfort during continuous wear. The first hinge member 206 and the second hinge member 208 are constructed of lightweight aluminum or plastic to reduce the mass contributed by these rotating components. In some examples, through the use of optimized materials and efficient mechanical design, the weight of the entire hinge assembly 220 can be in the range of only about 1.4 to 10 grams. This lightweight construction helps ensure that the hinge assembly 220 does not contribute significant weight to the sides of the AR glasses 100.

[0054] While some existing hyperextension mechanisms include metal snap-fit ​​structures, other variations utilize polymers or composites to further minimize weight. Specifically, advanced plastics and carbon fiber compounds offer a high strength-to-weight ratio. Replacing metal with lighter polymers or carbon allows for a significant reduction in density while maintaining elastic strength. For example, by using various composite layups and adding polymers, snap-fits can be up to 40% lighter than steel or aluminum while maintaining comparable durability. This significantly reduces the hyperextension mechanism's contribution to the overall hinge assembly's weight. Lighter hyperextension components also allow for the redistribution of the weight savings to additional sensors or projection electronics.

[0055] By using durable yet ultra-lightweight metal or plastic, the hinge components avoid putting stress on the critical head-mounted sensor components in the AR Glasses 100. Therefore, the lightweight hinge construction complements other ergonomic design elements to maintain the comfort of the AR Glasses 100 during extended wear. Users can enjoy rich AR experiences enabled by robust eye-tracking, scanning, and projection hardware integrated into the AR glasses without discomfort from the hinges connecting the temples and the front frame.

[0056] The slim hinge mechanism is also seamlessly integrated into the arm of the AR Glasses 100, without any bulky protrusions that could cause pressure points on the user's head. This lightweight and compact hinge mechanism embodies a design focused on improving wear comfort for all-day use of the AR Glasses 100.

[0057] Now refer to Figures 6A to 6C as well as Figures 7A to 7B As mentioned above, the hinge device 220 includes a partially cylindrical shell structure 350 configured to seal, close, or separate the first compartment from the second compartment during rotation between the first hinge member 206 and the second hinge member 208. This partially cylindrical shell structure 350 is designed to allow the flexible cable 614 connector to pass between the two compartments. In some examples, the flexible cable 614 may comprise or be composed of one or more flexible printed circuit boards (FPCs) or flexible printed circuit boards (PCBs). Other flexible electrical connections are possible.

[0058] In some examples, multi-layered or multi-strand flexible cables 614 electrically interconnect hardware components distributed across the frame and temples of the AR glasses 100. As mentioned above, these components may include batteries, camera devices, sensors, processors, waveguides, projectors, and other components that enable AR functionality. In some examples, the flexible cables 614 pass through hinge devices 220 as they travel from the frame to the temples.

[0059] The partially cylindrical shell structure 350 is used in the opening / closing of the temple relative to the frame (e.g., as...). Figure 6B and Figure 6C During the transition (shown in the diagram), sufficient space and protection are provided for the flexible cable 614. Without space 622, the flexible cable 614 could be squeezed, bent, or otherwise damaged, resulting in a failure of electrical continuity. Damage to the flexible cable 614 would disable the core functions of the AR glasses. The partially cylindrical shell structure 350 seals, encloses, or isolates the flexible cable 614 from the rotating first and second hinge members. This allows the flexible cable 614 to bend smoothly and pass through the hinge assembly 220 wiring without the risk of mechanical damage or electrical short circuits. In some examples, the reliable operation of integrated AR electronics depends heavily on the safe passage of the flexible cable 614 through the hinges of the AR glasses 100, for example, as shown in the diagram. Figures 7A to 7B As shown.

[0060] Some examples in this article also include methods. (See references.) Figure 8This illustrates example operations in method 800 of manufacturing a hinge device. In operation 802, method 800 provides a first hinge member. In operation 804, method 800 provides a second hinge member. In operation 806, method 800 rotatably couples the first hinge member to the second hinge member such that the second hinge member can rotate throughout the entire rotation zone. In operation 808, method 800 integrates a superextension mechanism configured to apply a superextension clamping force between the first hinge member and the second hinge member when the first hinge member and the second hinge member over-rotate relative to each other into the superextension zone, wherein the superextension mechanism is activated during over-rotation between the first hinge member and the second hinge member.

[0061] In some examples, method 800 also includes an integrated friction element configured to provide rotational resistance between the first hinge member and the second hinge member in the rotational zone.

[0062] Example

[0063] Some examples of this disclosure include the following:

[0064] Example 1. A hinge device comprising: a first hinge member; a second hinge member rotatably coupled to the first hinge member such that the second hinge member is rotatable throughout a rotational region; and an overextension mechanism configured to apply an overextension clamping force between the first hinge member and the second hinge member when the first hinge member and the second hinge member are over-rotated relative to each other into the overextension region, wherein the overextension mechanism is activated during the over-rotation between the first hinge member and the second hinge member.

[0065] Example 2. The hinge device according to Example 1, wherein the super-extension mechanism is integrally formed with the second hinge member.

[0066] Example 3. The hinge device according to Example 1 or Example 2 further includes a friction element configured to provide rotational resistance between the first hinge member and the second hinge member in the rotational zone.

[0067] Example 4. The hinge device according to Example 3, wherein the resisting torque of the friction component is less than the clamping force or resisting torque generated by the overextension mechanism.

[0068] Example 5. A hinge device according to any one of Examples 1 to 4, wherein the super-extension mechanism comprises a cantilever or snap-fit ​​structure.

[0069] Example 6. The hinge device according to Example 5, wherein the snap-fit ​​structure includes at least one of a U-shape, a C-shape, or a triangle in a transverse view or cross section.

[0070] Example 7. A hinge device according to any one of Examples 1 to 6, wherein the superextension mechanism can be configured to provide a variable superextension clamping force based on a variation in the thickness or width of the superextension mechanism.

[0071] Example 8. A hinge device according to any one of Examples 1 to 7, wherein the first hinge member or the second hinge member includes a partially cylindrical shell structure configured to separate or close the first compartment and the second compartment during rotation between the first hinge member and the second hinge member.

[0072] Example 9. The hinge device according to Example 8, wherein a partial cylindrical shell structure is configured to allow a flexible electrical connector to pass between a first compartment and a second compartment.

[0073] Example 10. The hinge device according to any one of Examples 1 to 9 further includes a first mounting portion on the first hinge member, the first mounting portion being configured to engage with a corresponding second mounting portion on the device, the first mounting portion including one or more of a plurality of pins, holes, wall alignment structures or fasteners to attach the first hinge member to the device.

[0074] Example 11. The hinge device according to Example 10, wherein the device includes augmented reality (AR) glasses.

[0075] Example 12. A hinge device according to any one of Examples 1 to 11, wherein the overextension clamping force applied by the overextension mechanism is variable based on the degree to which the first hinge member or the second hinge member enters the overextension zone when the first hinge member and the second hinge member over-rotate relative to each other.

[0076] Example 13. A hinge device according to any one of Examples 1 to 12, wherein a first hinge member is coupled to the temple of the AR glasses, and a second hinge member is coupled to the front frame of the AR glasses.

[0077] Example 14. The hinge device according to any one of Examples 1 to 13 further includes a rotation limiter configured to limit the rotation of the first hinge member relative to the second hinge member to a specific angular range of the rotation zone before entering the overextension zone.

[0078] Example 15. The hinge device according to Example 14, wherein the rotation limiter includes interacting protrusions and grooves located on the first hinge member and the second hinge member, respectively.

[0079] Example 16. A hinge device according to any one of Examples 1 to 15, wherein the first hinge member and the second hinge member each comprise a metal or plastic construction or are made of a metal or plastic construction.

[0080] Example 17. The hinge device according to Example 16, wherein the hinge device has a weight in the range of 1.4 to 10 grams.

[0081] Example 18. An augmented reality glasses, comprising a frame having optical components configured to project augmented reality content; and at least one temple coupled to the frame via a hinge device according to Example 1.

[0082] Example 19. A method of manufacturing a hinge device, the method comprising: providing a first hinge member; providing a second hinge member; rotatably coupling the first hinge member to the second hinge member such that the second hinge member is rotatable throughout a rotational region; and integrating an overextension mechanism configured to apply an overextension clamping force between the first hinge member and the second hinge member when the first hinge member and the second hinge member are over-rotated relative to each other into the overextension region, wherein the overextension mechanism is activated during the over-rotation between the first hinge member and the second hinge member.

[0083] Example 20. The method according to Example 19 further includes an integrated friction element configured to provide rotational resistance between the first hinge member and the second hinge member in the rotational zone.

[0084] Although examples have been described with reference to specific examples, it will be apparent that various modifications and changes can be made to these examples without departing from the broader scope of this disclosure. Therefore, the specification and drawings should be considered illustrative rather than limiting. The drawings, which form part of this disclosure, illustrate specific examples of how the subject matter can be practiced by way of illustration rather than limitation. The examples shown are described in sufficient detail to enable those skilled in the art to practice the teachings disclosed herein. Other examples can be utilized and derived therefrom, allowing for structural and logical substitutions and changes without departing from the scope of this disclosure. Therefore, this detailed description should not be construed as limiting, and the scope of the various examples is defined only by the appended claims and the full scope of their equivalents.

[0085] For convenience only, such examples of the subject matter of this invention may be referred to herein individually and / or collectively by the term "example," and if more than one invention or inventive concept is disclosed in fact, it is not intended to voluntarily limit the scope of this application to any single invention or inventive concept. Therefore, while specific examples have been shown and described herein, it should be understood that any arrangement intended to achieve the same purpose may be substituted for the specific examples shown. This disclosure is intended to cover any and all adaptations or variations of the various examples. Combinations of the above examples and other examples not specifically described herein will be apparent to those skilled in the art upon review of the foregoing description.

Claims

1. A hinge device, comprising: First hinge component; A second hinge member is rotatably coupled to the first hinge member so that the second hinge member can rotate throughout the rotation area; as well as An overextension mechanism is configured to apply an overextension clamping force between the first hinge member and the second hinge member when the first hinge member and the second hinge member are over-rotated relative to each other into an overextension zone, wherein the overextension mechanism is activated during the over-rotation between the first hinge member and the second hinge member.

2. The hinge device according to claim 1, wherein, The super-extension mechanism is integrally formed with the second hinge component.

3. The hinge device of claim 1, further comprising a friction element configured to provide rotational resistance between the first hinge member and the second hinge member in the rotation zone.

4. The hinge device according to claim 3, wherein, The resistance torque of the friction component is less than the clamping force or resistance torque generated by the super-extended mechanism.

5. The hinge device according to claim 1, wherein, The super-extendable mechanism includes a cantilever structure or a snap-fit ​​structure.

6. The hinge device according to claim 5, wherein, The snap-fit ​​structure includes at least one of a U-shape, a C-shape, or a triangle in a transverse view or cross-section.

7. The hinge device according to claim 1, wherein, The hyperextension mechanism can be configured to provide a variable hyperextension clamping force based on variations in the thickness or width of the hyperextension mechanism.

8. The hinge device according to claim 1, wherein, The first hinge member or the second hinge member includes a partially cylindrical shell structure configured to separate or close a first compartment and a second compartment during rotation between the first hinge member and the second hinge member.

9. The hinge device according to claim 8, wherein, The partially cylindrical shell structure is configured to allow the flexible electrical connector to pass between the first compartment and the second compartment.

10. The hinge device of claim 1, further comprising a first mounting portion on the first hinge member, the first mounting portion being configured to engage a corresponding second mounting portion on the device, the first mounting portion including one or more of a plurality of pins, holes, wall alignment structures or fasteners to attach the first hinge member to the device.

11. The hinge device according to claim 10, wherein, The device includes augmented reality (AR) glasses.

12. The hinge device according to claim 1, wherein, The super-extended clamping force applied by the super-extended mechanism is variable based on the degree to which the first hinge member or the second hinge member enters the super-extended zone when the first hinge member and the second hinge member are over-rotated relative to each other.

13. The hinge device according to claim 1, wherein, The first hinge member is coupled to the temple of the AR glasses, and the second hinge member is coupled to the front frame of the AR glasses.

14. The hinge device of claim 1, further comprising a rotation limiter configured to limit rotation of the first hinge member relative to the second hinge member to a specific angular range of the rotation zone before entering the hyperextension zone.

15. The hinge device according to claim 14, wherein, The rotation limiter includes interacting protrusions and grooves located on the first hinge member and the second hinge member, respectively.

16. The hinge device according to claim 1, wherein, The first hinge component and the second hinge component each include a metal or plastic structure or are made of a metal or plastic structure.

17. The hinge device according to claim 16, wherein, The hinge device has a weight in the range of 1.4 to 10 grams.

18. An augmented reality glasses, comprising: A frame having optical components configured to project augmented reality content; as well as At least one temple, said at least one temple being coupled to the frame via a hinge device according to claim 1.

19. A method of manufacturing a hinge device, the method comprising: Provide a first hinge component; Provide a second hinge component; The first hinge member is rotatably coupled to the second hinge member so that the second hinge member can rotate throughout the rotation area; as well as An integrated super-extension mechanism is configured to apply a super-extension clamping force between the first hinge member and the second hinge member when the first hinge member and the second hinge member are over-rotated relative to each other into the super-extension zone, wherein the super-extension mechanism is activated during the over-rotation between the first hinge member and the second hinge member.

20. The method of claim 19, further comprising an integrated friction element configured to provide rotational resistance between the first hinge member and the second hinge member in the rotational zone.

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