Abstract: A new and improved quiet hinge mechanism assembly comprises first and second hinge plates, and first and second connect plates. A pin shaft passes through the first and second connect plates, and a bushing and gasket are mounted upon the pin shaft such that the first connect plate does not engage the pin shaft, and the first and second connect plates do not engage each other. In addition, the bushing and the gasket are fabricated from a suitable, self-lubricating material, such as, for example, polyoxymethylene (POM), thereby rendering the new and improved hinge mechanism assembly quiet.

Abstract: A table includes a table panel, first and second mounting members, and first and second leg assemblies. Each of the first and second mounting members is coupled or formed with the table panel. Each of the first and second leg assemblies includes a linking member having an end portion rotatably coupled with the first mounting member and another end portion rotatably coupled with the second mounting member. When the first or second leg assembly is unfolded, the linking member abuts one or more retainers of the table panel and forms interference fit with the first and second mounting members. This significantly reduces vibration when the table is in use.

Abstract: A hinge device according to the present invention includes a pivotable member pivotable relative to a fixed member around a first screw member or a second screw member serving as a pivot shaft. A rotation restricting washer is disposed between a movable plate portion of the pivotable member and a bearing face of the second screw member. The rotation restricting washer is disposed non-turnably relative to a support plate portion of the fixed member by fitting a restricting piece disposed on one of the support plate portion and the rotation restricting washer into a receiving portion disposed on the other one of the support plate portion and the rotation restricting washer.

Abstract: A first hinge 11 comprises: a first turning shaft portion 111 which extends vertically; a first supporting portion 112 which is extended longitudinally and laterally, and supports the bottom of the first turning shaft portion 111; and a first mounting portion 113 which extends downwardly from the rear end of the first supporting portion 112. A second hinge 12 comprises: a second turning shaft portion 121 which extends vertically; a second supporting portion 122 which is extended longitudinally and laterally, and supports the top of the second turning shaft portion 121; and a second mounting portion 123 which extends upwardly from the rear end of the second supporting portion 122. The first supporting portion 112 is disposed above the second supporting portion 122. The first mounting portion 113 is disposed below the second supporting portion 122. The second mounting portion 123 is disposed above the first supporting portion 112.

Abstract: The present invention provides a hinge of a mobile terminal with a flexible screen. The outer side of the hinge supports the flexible screen. The hinge comprises a main support body, a first bracket and a second bracket rotatably connected to a rotating shaft of the hinge, a first support body and a second support body respectively slidably connected to the first bracket and the second bracket, and a synchronous control mechanism. An auxiliary support body is separately provided between the first support body and the main support body and between the second support body and the main support body. The auxiliary support body is correspondingly located at a bend portion of the hinge in a closed state. The hinge is further provided with a first guide structure rotating around the rotating shaft of the hinge together with the first bracket and a second guide structure rotating around the rotating shaft of the hinge together with the second bracket.

Abstract: A dual-shaft hinge includes a hinge body, a pivot shaft set including a first pivot shaft and a second pivot shaft and pivotally mounted in the hinge body in parallel, and a rotation constraint unit mounted in the hinge body and so configured for allowing the first pivot shaft and the second pivot shaft to be rotated in turn.

Abstract: A posterior cervical fixation system including an occipital plate member, a cross connector, a pair of elongated spinal rods and a plurality of polyaxial screws. The occipital plate member configured for fixing to an occipital bone comprises an aperture to receive a bone anchor member to secure the occipital plate member to the occipital bone and at least one rod clamping element dimensioned to receive at least one spinal rod. The cross connector secures the pair of elongated spinal rods to vertebral bodies. The cross connector includes a pair of collet connectors and a cross bar that is configured to secure the pair of elongated spinal rods in a desired distance. Each polyaxial screw has an anchor head associated with a fastening member. The pair of elongated spinal rods is configured to extend along the vertebral bodies between the occipital plate member and at least one of the polyaxial screws.

Abstract: A hinge assembly includes a first bracket and a second bracket. The first bracket includes a first attachment member, a pin member and an elastomer member. The second bracket includes a second attachment member and a hollow cylinder member.

Abstract: Provided is a rearwardly-pivoting door having a pivoting arc in the longitudinal direction of a vehicle. The door may be pivotally coupled with the vehicle by a hinge assembly at a rear portion of the door and a front portion is slidably engaged in a channel receiver when the door is in a closed position. The hinge assembly and channel receiver resist lateral movement of the door to maintain an occupant within a seating area of the vehicle. One or more securing devices may be utilized to maintain the door in an opened or closed position. The securing device may be mechanical and/or magnetic.

Abstract: A hinge unit includes a first member, a second member, a coupling member, a protrusion fixed to the first member, and a tilt stopper. When the tilt stopper is fixed at a position (P1) of the second member, the tilt stopper and the protrusion are brought into contact with each other, to thereby limit a movable range within a first angle range. When the tilt stopper is fixed at a position (P2) of the second member, the tilt stopper and the protrusion are held in non-contact with each other irrespective of a pivoting angle.

Abstract: A self-contained hinge mechanism is provided including a hinge movement control assembly. The hinge movement control assembly includes a number of stacked alternating friction rings and pressure disks providing a tunable pivoting resistance. As the hinge mechanism is actuated, an internal shaft and a set of friction rings rotationally-locked to the internal shaft and door moves relative to a set of pressure disks rotationally-locked to a fixed hinge mechanism housing and mount frame. A resistance to the pivoting of the hinge mechanism elements is provided by the clamping force of multiple force members moving the pressure disks along axial translation guides of the housing closer to one another and sandwiching the friction rings closer together.

Abstract: The description relates to devices that include hinged portions and controlling rotation of the portions. One example can include a display that is configured to rotate relative to an axis. The example can also include a clutch assembly interposed between first and second planet gear assemblies positioned along the axis. The first and second planet gears configured to multiply resistance to rotation around the axis that is supplied by the clutch assembly.

Abstract: The description relates to devices, such as computing devices having displays that can be rotated through a range of travel. The device can counter-balance the display to create a near weightless feel for the user when repositioning the display.

Abstract: A surgical instrument includes a first arm engageable with a first spinal construct disposed with a first vertebral surface. A second arm is connected with the first arm via a pivot and being engageable with a second spinal construct disposed with a second vertebral surface. The first arm is movable to rotate the first spinal construct relative to the pivot and/or the second arm is movable to rotate the second spinal construct relative to the pivot such that the first vertebral surface is moved relative to the second vertebral surface. Systems and methods of use are disclosed.

Abstract: A variable resistance brake clutch facilitates a rotational coupling of electronic device components, and can include a rotatable shaft, a brake disposed proximate the rotatable shaft, and an actuator coupled to and configured to actuate the brake. The brake applies a braking force against a rotational motion of the shaft, and release of the brake results in low to no frictional resistance against the rotational motion. The braking force can be provided by default, and a capacitive touch sensor or other input component can allow a user to actuate the actuator manually to release the brake when desired. The release can be maintained as long as the sensor detects the touch event or other user input. A processor and solenoid can facilitate actuation by on a touch event, which sensor can be located at a back corner of a laptop upper component.

Abstract: A biaxial hinge which allows a first casing having a keyboard and a second casing having a display to open and close 360 degrees relative to each other. The biaxial hinge ensures that the keyboard, rubber feet, and other parts can sink relative to the first casing. The biaxial hinge includes a biaxial hinge portion and an actuating mechanism. The biaxial hinge portion includes a rotation controlling unit. The actuating mechanism includes a fixed cam part, a slide cam part facing the fixed cam part, and a link part.

Abstract: An adjustable supporting device includes a pivotal connection device and two supporting members individually pivotally connected to the pivotal connection device. The pivotal connection device includes a rotational restriction mechanism including a driving part and a restricting part connected to the driving part. The restricting part is capable of being driven by the driving part so as to move relative to the supporting members. Therein, the restricting part is capable of entering limitation ranges of rotational restriction structures of the supporting members simultaneously for individually limiting rotation ranges of the supporting members relative to the pivotal connection device according to the rotational restriction structures.

Abstract: The embodiment of the invention provides a hinge device and a folded apparatus having such hinge device. The hinge device comprises a hinge bracket, a first axis, and a second axis provided being parallel with each other and supported rotatably by the hinge bracket, the first axis is connected to a first body of an apparatus, and the second axis is connected to a second body of the apparatus, the first body can rotate from 0 degree to 360 degree and/or from 360 degree to 0 degree with respect to the second body by being brought by the first axis and the second axis, wherein, when the first body rotates from 0 degree to a predetermined angle and/or from the predetermined angle to 0 degree with respect to the second body, the first axis rotates and the second axis rests, and wherein, when the first body rotates from the predetermined angle to 360 degree and/or from 360 degree to the predetermined angle with respect to the second body, the second axis rotates and the first axis rests.

Abstract: To provide a biaxial hinge which enables an opening/closing movement of terminal, such as notebook PC, from 0° up to 180° or more, which ensures the opening/closing movement starting from a stable stopping position available at any opening/closing angle, a second hinge shaft attached to a second casing and a second hinge shaft attached to a second casing are connected to each other via a joint member and provided so as to be rotatable relative to each other, and a selective rotation restricting device is provided between the both hinge shafts. The selective rotation restricting device is so structured that it allows the both hinge shafts to rotate, when the first casing and the second casing are in a closed state, and it restricts one of the first hinge shaft and the second hinge shaft in rotation, when the other hinge shaft rotates relative to the one hinge shaft.

Abstract: A dual-shaft hinge includes an axle housing, a pivot shaft set including a first pivot shaft and a second pivot shaft respectively pivotally coupled to the axle housing, a transmission mechanism including a first transmission member connected to the first pivot shaft and a second transmission member connected to the second pivot shaft, and a link connected between the first transmission member and the second transmission member in such a manner that the first pivot shaft and the second pivot shaft are rotatable relative to each other and the axle housing is turnable about the second pivot shaft to prevent the problem of a broken component due to overstress, or the problem of a jammed component.

Abstract: A hinge includes a pivot, two connection members pivotally connected by the pivot, a first magnetic part connected to one of the connection members, a second magnetic part moveably disposed relative to the first magnetic part and kinetically connected to the other one of the connection members, and an adjustment part kinetically connected to the other connection member and urging against the adjustment part. The magnetic moment of the second magnetic part is opposite to that of the first magnetic part. When the two connection members rotate relatively, the other connection member drives the adjustment part and the second magnetic part to rotate relative to the first magnetic part, so as to produce a repulsive moment resisting the rotation and varies with the rotation. A foldable electronic apparatus has the hinge.

Abstract: A rotary shaft structure is provided with rotational and locating functions based on a compact request condition. The rotary shaft structure includes a combination of a shaft body and a braking device, in which the braking device includes a first end provided with a limiting portion and a second end provided with an assembling portion, thereby preventing an axial displacement of a rotary shaft. The shaft body corresponding to the first end of the braking device and the limiting portion thereof includes a base portion and at least one braking portion formed on the base portion, in which a locating function is formed when an interference state of the limiting portion of the braking device and the braking portion of the shaft body is formed, thereby improving the conditions of assembly and fitting difficulties, complication and time-consuming process in conventional skills.

Abstract: An adjustable friction hinge that implements a sex bolt in the barrel of the hinge is disclosed. One or more washers can be concentrically arranged about the sex bolt and can interact with the portions of the leaves of the hinge to create the necessary friction to maintain a desired hinge position. An indent can also be provided on the friction hinge to abut an interior of the sex bolt and prevent loosening of the sex bolt during use. The sex bolt acts as a more stable structural backbone as compared to the prior art adjustable hinge and includes a receiving portion where a common tool can be used to reduce or increase the amount of friction in the hinge. The washer configuration of the present application exhibits little to no wear characteristics over time.

Abstract: A hinge mechanism includes a shaft with shaft portion, shaft sleeve, first torque spring, and first sliding member. The shaft sleeve defines a through hole for the shaft portion extending through, a slot extending substantially parallel to the through hole, and forms hooks extending from two opposite sides of the slot. The first sliding member goes over the shaft sleeve, and the first torque spring includes a first end fixed to the shaft and a second end extending through the slot and then fixed to the first sliding member. The first torque provides torque to prevent the shaft sleeve from rotating to the shaft. When the first sliding member is moved along the shaft sleeve to compress the first torque spring, the torque can be adjusted.

Abstract: A portable electronic device includes a first body, a first pivot element fixed to the first body, a shaft, a second pivot element and a second body fixed to the second pivot element. The shaft having a first block is pivoted to the first pivot element. The second pivot element having a second block is pivoted to the shaft. When the second body covering the first body rotates together with the second pivot element pivoting relatively to the shaft to form a first included angle between the first and second bodies, the second block leans against the first block to restrict the relative pivoting of the second pivot element and the shaft. Then, the second body rotates together with the shaft pivoting relatively to the first pivot element to form a second included angle greater than the first included angle between the first and second bodies.

Abstract: A hinge mechanism includes a fixing member, a rotary member, a rotary member, an adjusting member and a support member, all of which are interconnected. The rotary member is capable of being positioned in a preset manner to form an acute angle relative to the fixing member, the adjusting member is capable of being positioned in a preset manner to form an acute angle relative to the rotary member; and the support member is capable of being positioned in a preset manner to form an obtuse angle relative to the adjusting member. An electronic device using the hinge mechanism is also provided.

Abstract: A hinge assembly has a pintle, a stationary leaf, a rotating leaf, a rotating pressing disk, a stationary pressing disk, a biasing assembly and a fastener. The rotating pressing disk is mounted rotatably around the pintle, is attached non-rotatably to the rotating leaf and has a track face, an inner track and an outer track. The stationary pressing disk is mounted securely around the pintle and has a protrusion face, an inner protrusion and an outer protrusion. The inner and outer protrusions respectively contact slidably with the inner and outer track on the rotating pressing disk. With the arrangement of the inner and outer tracks on the rotating pressing disk and the inner and outer protrusions on the stationary pressing disk, the resistance provided by the hinge assembly is variable.

Abstract: A hinge mechanism includes a first rotation assembly, a second rotation assembly substantially parallel to the first rotation assembly, a brace member, a connection shaft partially received in the sliding slot, a first connection member, and a second connection member. The first rotation assembly includes a first pivoting shaft and a first bracket sleeved on the first pivoting shaft. The first bracket includes a mounting portion eccentrically formed on one end of the first bracket. The second rotation assembly includes a second pivoting shaft and a second bracket sleeved on the second pivoting shaft. The second bracket includes a mounting portion eccentrically formed on the second bracket. The brace member defines a sliding slot. An end of the first connection member is eccentrically connected to the first pivoting shaft, and the other end of the first connection member is connected to the connection shaft.

Abstract: A hinge assembly has a pintle, a torque assembly and a resistance assembly. The pintle has a head formed on the pintle. The torque assembly is mounted on the pintle at a first side of the head to provide a force to automatically open the cover relative to the body to a first angle. The resistance assembly is mounted on the pintle at a second side of the head to provide a frictional force to hold the cover at a second angle relative to the body when the cover is closed relative to the body. Accordingly, the cover can be pivoted open relative to the body automatically with the torque provided by the torque assembly.

Abstract: A hinge is operable to a fixed open position where it is prevented from being closed and to a position where it is released from the fixed open position and is capable of being operated to a closed position.

Abstract: A hinge comprises a shaft, a bracket, a first interference member, a second interference member, and a sleeve member set around and in tight contact with the shaft. A first end of the sleeve member is fixed to the bracket, and a second end of the sleeve member is fixed to the second interference member. The shaft rotates in the sleeve member to rub against the inner surface of the sleeve member to supply friction.

Abstract: A pivotable support shaft for connecting a display with a base member and supporting the display is disclosed. The support is designed to enable the display to have different postures in working condition and package and transporting condition. For example, in the working condition, the screen of the display may be pivotable between a pitch-up angle of about 20° and a pitch-down angle of about ?20°, and in the package and transporting condition, the screen of the display may be pivoted down to a pitch-down angle of about ?90° where the screen faces downwardly to reduce the package size and improve the transportation stability.

Abstract: An interfering assembly of a hinge includes a male element including a first raised portion and a second raised portion, and a female element defining a through hole. A sliding surface apart from a center of the through hole protrudes from the female element. An inner slot and an outer slot are formed beside the sliding surface. The female element defines a first depressed portion and a second depressed portion correspondingly engaged with the first and second raised portions. Widths of the inner slot and the outer slot are gradually varied. During rotation of the rotating member, the first and second raised portions are slid out from the first and second depressed portions, respectively, and then in frictional engagement with the sliding surface, together with partial portions covering the inner and outer slots, correspondingly.

Abstract: A hinge includes a fixing frame, a rotating frame, a support, and a connecting member. The rotating frame is pivotally joined to the fixing frame. The support includes a first connecting portion for joining to the base and a second connecting portion. The connecting member is mounted between the rotating frame and the support. Furthermore, the connecting member is operably moved between an extended position and a retracted position in response to two opposite pivoting directions of the rotating frame with respect to the fixing frame. In addition, the support moves away from the rotating frame in response to the connection member moving from the retracted position to the extended position thereof.

Abstract: A hinge assembly includes a pivot shaft, a first leaf, a fixing leaf, a restricting member, a deformable member, two limiting blocks, and a fastening member. The rotatable leaf is non-rotatably connected to the pivot shaft and the fixing leaf is rotatably connected to the pivot shaft. The restricting member and the deformable member are rotatably sleeved on the pivot shaft. The restricting member defines two positioning grooves. The deformable member includes a base plate and two protrusions extending substantially perpendicularly from the base plate. The limiting blocks are partially received in the positioning grooves and connected to the deformable member. When the rotatable leaf is rotated, the limiting blocks slide out of the positioning grooves to press the base plate of the deformable member such that the deformable member becomes elastically deformed. The fastening member is fixed on an end of the pivot shaft.

Abstract: A hinge has a pintle, a spacer assembly, a stationary bracket and a rotating bracket. The pintle is mounted through the spacer assembly and is connected to the stationary and rotating brackets. The spacer assembly has multiple spacers stacked with each other. Each spacer has a ring segment and a bearing segment. The ring segment is mounted around the pintle. The bearing segment has an absorbing space to absorb the stress acting on the ring segment. Therefore, the spacer sustains less stress to prevent breakage easily and a lifespan of the spacer is extended. Therefore, the hinge has a longer lifespan.

Abstract: A hinge includes a fixing member, a shaft fixed to the fixing member, a rotating member, an interfering member, and a fastener. The shaft includes a shaft post, and the fastener is fixed to a distal end of the shaft post. The interfering member defines a fixing hole departing from a center of the interfering member, and includes two guiding surfaces. The rotating member defines an oblong adjusting hole, through which the shaft post rotatably passes. A first resisting stub and a second resisting stub extend from the rotating member, to resist against the corresponding guiding surfaces. The shaft post is fixedly received in the fixing hole. When the rotating member is rotated relative to the shaft post, the first and second resisting stubs always resist against and move along the corresponding guiding surfaces, to urge the shaft post to relatively move in the adjusting hole.

Abstract: An adjustable friction hinge with a first hinge portion with two spaced apart first hinge knuckles and second hinge portion having a second hinge knuckle with rotatably fit together. A barrel bushing is non-rotatably positioned in the second hinge knuckle. A friction bushing is slidably and non-rotatably located in openings in the two first hinge knuckles. A threaded compression nut, and a non-threaded compression nut are located in the two spaced apart first hinge knuckles. A screw passes through the non-threaded compression nut, the spaced apart first hinge knuckles, the second hinge knuckle, the two friction bushings, and into the threaded compression nut. When the screw is tightened, the threaded and non-threaded compression nuts force the two frictional bushing into frictional contact with the barrel bushing to increase a force required to move the first hinge portion and the second hinge portion relative to each other.

Abstract: An interfering assembly of a hinge includes a male element including a first raised portion and a second raised portion, and a female element defining a through hole. A slot apart from a center of the through hole is defined in the female element. An inner ring and an outer ring are formed beside the slot. The inner ring defines a first depressed portion engaged with the first raised portion, and the outer ring defines a second depressed portion engaged with the second raised portion. Widths of the inner ring and the ring slot are gradually varied. During rotation of the rotating member, the first and second raised portions are slid out from the first and second depressed portions, respectively, and then in frictional engagement with the inner and outer rings, together with partial portions of the first and second raised portions covering the slot, correspondingly.

Abstract: A limiting hinge has a stationary limiting washer, a rotating limiting washer, a rotating bracket and a positioning washer mounted around a pintle in sequence. A first resistance is formed between the stationary limiting washer and the rotating limiting washer. A second resistance is formed between the rotating limiting washer and the rotating bracket. A third resistance is formed between the rotating bracket and the positioning washer. Because the first resistance is larger than the second resistance while the second resistance is larger than the third resistance, the rotating limiting washer disengages from the rotating bracket when a huge force is accidentally applied. Therefore, the rotating limiting washer stays still with the stationary limiting washer to prevent breakage.

Abstract: A 360° bi-directional rotary hinge formed of a fixed bracket, a rotary bracket, a limiter plate, a stop plate, a positioning plate, a spring ring and a fastening member for use in a folding electronic device is disclosed. Subject to matching between bottom blocks of the limiter plate and arched sliding grooves of the stop plate, movement of the stop plate is constrained by the fixed bracket, and therefore rotation of the rotary bracket of the 360° bi-directional rotary hinge is limited to a forward and backward 360° angle. Further, the stop plate carries an index block corresponding to a ?180° angle indication hole and a 180° angle indication hole on the base member of the folding electronic device for giving an indication when the rotary bracket is rotated to +180° or ?180° angle relative to the fixed bracket.

Abstract: The present application is directed to a hinge for a clamshell-type wireless communication device or other electronic device. In one embodiment, the communication device includes a base portion and a flip portion. A hinge mechanism movably couples the flip portion to the base portion so that the flip portion may pivot between a closed position and an open position. The hinge mechanism comprises first and second hinge parts, an indexing pin, and a spring. The indexing pin is rotatable relative to the first hinge part about a pivot axis. Additionally, the indexing pin is movable axially along the pivot axis. The second hinge part is non-rotatably engaged with the indexing pin and is rotatable about the pivot axis relative to the first hinge part between closed and open positions. The spring applies both an axial force and a rotational force to the indexing pin.

Abstract: A hinge assembly includes a base, a joint member, a pintle, and a coiling spring. The joint member is rotatably connected to the base. The pintle runs through the base and the joint member. The coiling spring has a first end and a second end. The first end is fixed relative to the base, and the second end is fixed relative to the joint member.

Abstract: A hinge provides swiveling of a display relative to one side of a host body including a first fastening seat, a pintle, a second fastening seat, a main torsion anchor member, a torsion rotary member, an ancillary torsion anchor member, a compressed elastic reed assembly and a nut. The main torsion anchor member and the torsion rotary member are compressed by a returning force of the compressed elastic reed assembly. When the pintle pivots to a selected angle, the protrusion rapidly slides in a retaining latch trough of the main torsion anchor member through a steep sloped surface so that the display automatically and fully folds over the host body. The torsion rotary member pivots concurrently so that the bulged edge slides on a gradual sloped surface of different gradients so that adequate friction resistance is generated due to compression of the returning force of the compressed elastic reed assembly.

Abstract: A hinge assembly includes a shaft, a leaf, a rotatable joint, a positioning member, an elastic engaging member, and a fastening member. The leaf is non-rotatably mounted on the shaft, and the rotatable joint is rotatably mounted on the shaft. The positioning member includes an engaging surface, and is non-rotatable relative to the rotatable joint. The elastic engaging member includes an engaging surface, and is non-rotatably sleeved on the shaft. The fastening member is engaged on the shaft. One of the engaging surfaces of the positioning member and the engaging member forms an engaging protrusion, and the other one of the engaging surfaces of the positioning member and the engaging member defines an engaging slot engaging with the engaging protrusion.

Abstract: A hinge assembly includes a pivot shaft, a rotary member and a steady member sleeved on the pivot shaft. The rotary member and the steady member faces each other and are rotatable relative to each other. The rotary member forms a first peak, and the steady member forms a second peak. A friction portion is formed between the rotary member and the steady member. A thickness of the friction portion exceeds or equals to a thickness of either of the first peak or the second peak, and is less than the combined thickness of the first peak and the second peak. A support mechanism using the hinge assembly is also provided.

Abstract: A hinge assembly includes a shaft, a first bracket, a resilient member, and an engaging member. The shaft includes a limiting structure including a guiding groove and a limiting slot. The first bracket is rotatable relative to the shaft. The engaging member is rotatably sleeved on the shaft and non-rotatable relative to the first bracket. The engaging member forms a latching pole slidably received in the guiding groove and being engagable with the limiting slot of the shaft.

Abstract: A hinge includes a rack, a shaft, and an interfering assembly. The interfering assembly includes a first interfering member fixed to the rack, and a second interfering member capable of rotating with the shaft. The first interfering member includes a first end surface. A first tab is formed on the first end surface. Each of two opposite ends of the first tab forms a first slope surface. The second interfering member includes a second end surface. A first recess is defined in the second end surface for receiving the first tab therein. Each of two opposite ends of recess forms a second slope surface. The shaft rotates with respect to the rack. One of the first slope surfaces of the first tab is able to engage with a corresponding one of the two second slope surfaces of the first recess to guide the first tab sliding into the first recess.

Abstract: A hinge assembly includes a pivotal shaft, a connecting member, a supporting member, a stationary member having an engaging surface, a rotating member having a receiving surface, and a locking member. A first end of the pivotal shaft is fixed to the connecting member. A second of the pivotal shaft is passed through the supporting member, the stationary member, the rotating member, and the locking member. The stationary member is fixed on the supporting member and is rotatable relative to the pivotal shaft. The rotating member is non-rotatable relative to the pivotal shaft. The engaging surface forms two first positioning protrusions and two second positioning protrusions. The receiving surface defines two first positioning grooves to receive the first positioning protrusions and two second positioning grooves to receive the second positioning protrusions. A height of each second positioning protrusion is larger than a height of each first positioning protrusion.

Abstract: A hinge assembly includes a first connecting member, a second connecting member, and a pivot subassembly. The pivot subassembly connects the first connecting member to the second connecting member. The pivot subassembly includes a rotatable shaft, a sleeve, and a positioning ring. The rotatable shaft is non-rotatably connected to the first connecting member. The sleeve is sleeved on the rotatable shaft, and non-rotatably connected to the rotatable shaft. The positioning ring is non-rotatably connected to the second connecting member. The sleeve defines two positioning cutouts, and the positioning ring defines two positioning protrusions engaging with the positioning cutouts. When the rotatable shaft rotates, one of the sleeve and the positioning ring deforms, so that the at least one positioning protrusion disengages from the at least one positioning cutout.