Abstract: A patient support apparatus includes a frame, a stationary member mounted relative to the frame, a movable member having a pivot member rotatably mounting the movable member about the stationary member, and a fastener securing the pivot member to the stationary member. The patient support apparatus also includes a joint between the pivot member and the stationary member, which is configured to apply a tension force on the fastener.

Abstract: An adjustable connection joint has a partially shaped spherical member attached to a first member to be adjusted with respect to a second member. A slidable base member slides in a bushing which is attached to the second member. A bolt extends through a washer that spreads a slotted end of the slidable base member against the bushing. Tightening the bolt pulls a locking member against an inside of the partially spherically shaped member and pulls it against a conical cavity on an end of the slidable member. Tightening the bolt concurrently locks the slidable member in the bushing and locks a position of the partially shaped cylindrical member in the conical cavity at the end of the slidable member.

Abstract: A body support device in accordance with one embodiment of the present disclosure includes a body attachment portion configured for attaching the body support device to a body of a user, wherein the body attachment portion has a first side and a second side, therein the first side is configured for coupling with the body of the user and wherein the second side is configured for facing away from the body of the user, a leg having an elongate body, a first end having a coupling interface configured for attachment with the second side of the body attachment portion and a second end extending from the body attachment portion, wherein the coupling interface includes a hinge assembly such that the leg is configured for movement within a pivot range, and a locking assembly for locking the leg in a fixed position relative to the body attachment portion within the pivot range.

Abstract: The present invention relates to a chair for supporting a person feeding a baby. The chair includes a seat. The chair includes an armrest operatively connected to the seat. The armrest is selectively rotatable about a vertical axis, and moveable forward/rearward, laterally inward/outward and vertically relative to the seat. The armrest is shaped to receive a baby thereon.

Abstract: An armrest arrangement for a vehicle seat includes a mounting fitting to be mounted on a vehicle seat, and an armrest body having a trunk and a support element having an arm support surface for receiving an arm of a user when using the armrest arrangement. The armrest body having the trunk can be detachably attached to the mounting fitting. When mounted on the mounting fitting, the armrest body is pivotable about an axis of rotation with respect to the mounting fitting. The support element can be displaced with the arm support surface relative to the trunk in a longitudinal extension direction of the trunk.

Abstract: A seating assembly may employ one or more of: a seat stagger, a seat overlap, and a seat angling to offer significant width and comfort gains and reduce the negative impact of width and leg room gains on seating density. With one seat of a pair staggered forward with respect to the other seat each may then be moved laterally and overlap (as seen from the front). The seating positions may be further improved by angling each seat away from their center arm rest area, reducing the encroaching effect of the overlap by pointing the passenger away from the overlap, reducing the visual impact of the staggered seating by pointing the passenger away from the nearest seat ahead, and improving leg room by directing the passenger's legs forward at an angle.

Abstract: The present disclosure provides a deployable and height adjustable armrest assembly for use with, for example, an aircraft pilot seat. The assembly includes an armrest positioned atop a rack comprising a plurality of detents each corresponding to a deployed armrest position. A lever carries a pawl that travels along one edge of the rack which locates in a selected one of the plurality of detents to lock the armrest in one of its deployed positions. The armrest is configured to be raised manually to deploy and adjust the armrest upward. The lever is configured to be actuated manually to disengage the pawl from its engagement in one of the detents to lower or return the armrest to its stowed positions. The armrest is particularly advantageous in close quarters such as a flight deck, or where a stowed armrest can be used to expand the width of the seat bottom.

Abstract: A cam adjustment device for lifting and lowering an armrest includes an armrest assembly and a support frame. The armrest assembly includes a connection base. The support frame has a support rod. The connection base is slidably connected to the support rod. A locking mechanism includes a cam wrench disposed on the connection base and rotatably installed on the connection base. The cam wrench is rotated such that a cam on the cam wrench presses and acts on the support rod. In a locked state, the cam wrench presses the support rod such that the connection base and the support rod are kept to be relatively fixed. In an unlocked state, the cam wrench is rotated to allow the cam to be released from the support rod, such that the connection base is lifted, lowered, and adjusted relative to the support rod.

Abstract: An armrest pad assembly includes: an armrest pad, wherein the armrest pad includes a first support section, a bendable section, and a second support section that are successively connected along a lengthwise direction of the armrest pad; wherein the armrest pad is internally provided with a first inner frame and a second inner frame, the first inner frame being fixed to the first support section, and the second inner frame being fixed to the second support section; wherein the first inner frame and the second inner frame are configured to be connected to an armrest frame of a chair, such that during upward and downward folding adjustment of the armrest frame of the chair, the first inner frame and the second inner frame drive the first support section and the second support section to be folded upward and downward about the bendable section to a predetermined position.

Abstract: An operator station is provided for a work vehicle cab. The operator station includes a base frame; an operator chair including a chair frame; and a chair arm. A chair arm adjustment mechanism includes a mounting post and the chair frame; a clamp configured to fit about the mounting post; a tie rod; and a lever. The lever is movable into a first pivotal position to move the tie rod to substantially disengage the clamp surface from the post surface, and the lever is movable into a second pivotal position to move the tie rod to substantially engage the clamp surface on the post surface. When the clamp surface is disengaged, the chair arm body is movable along the post axis, and when the clamp surface is engaged with the post surface, the chair arm body, at least in part, is fixed along the post axis.

Abstract: A backrest includes: a backrest body against which a seated person leans a back thereof, a backrest support positioned behind and supporting the backrest body; and an armrest body provided outside in a width direction of the backrest body and supported by the backrest support so as to move up and down at a position separated from the backrest body. A chair includes the above-described backrest.

Abstract: An armrest assembly for a vehicle seat, the assembly comprising an armrest, a support, and an intermediate portion, the armrest being movable in translation along a vertical direction relative to the support, the assembly further comprising a locking device for the armrest comprising: a first part having toothed elements, and a second part capable of coming into contact with the toothed elements of the first part, and wherein the second part is movable between a locking position in which the second part is in contact with the toothed elements of the first part and an unlocking position allowing movement in translation along the vertical direction of the armrest.

Abstract: A height adjustment assembly for use in furniture such as a chair armrest is revealed. The height adjustment assembly includes a fixing base, an outer sleeve, and a rod. A snap block is released from one of one of the slots of the fixing base to be in a released state when a drive portion of the rid is driven for synchronously driving the snap block of the rod to move for adjustment. Now the fixing base remains still and the outer sleeve can be moved and adjusted vertically relative to the fixing base. The vertical movement of the outer sleeve includes a highest point and a lowest point. The fixing base or a fixed position of the fixing base is located between the highest point and the lowest point. Thereby the fixing base is covered with the outer sleeve to improve beauty and quality of the furniture.

Abstract: The invention relates to a console for a vehicle passenger compartment. The console comprises for example an armrest and a fixed storage compartment that is under the armrest. The object of the invention is to provide a console comprising a storage compartment that offers a high degree of flexibility with respect to the possible uses in the vehicle and with respect to the space requirement. The particularity is that the console of a vehicle has a frame and a container, wherein the container is mounted so as to be movable relative to the frame, and wherein the container can be completely separated from the frame.

Abstract: The invention relates primarily to an armrest with an arm support (11) pivotable about an axis (a) between an upper end position and a lower end position, with a locking mechanism (13) movable between a locked position and a released position, comprising first detent (14) on the arm support (11) and second detent (15) on a structure (12) with fixed position, wherein the first detent (14) and the second detent (15) are engaged when the locking mechanism (13) is in a locked position and are disengaged when the locking mechanism is in a released position. The special feature thereof consists in that at least a partial range of the movement of the locking mechanism (13) in at least one direction between the released position and the locked position takes place in damped manner by a damping element (26).

Abstract: An arm assembly includes an arm support configured to support an arm of a seated user, an arm stalk extending downwardly from and supporting the arm support, an arm base telescopingly receiving the arm stalk between a first position and a second position and a bearing arrangement positioned between the arm stalk and the arm base. The bearing arrangement includes a bearing member configured to abut the arm base, and a biasing member configured to bias the bearing member from the arm stalk and into abutment with the arm base.

Abstract: A seating assembly may employ one or more of: a seat stagger, a seat overlap, and a seat angling to offer significant width and comfort gains and reduce the negative impact of width and leg room gains on seating density. With one seat of a pair staggered forward with respect to the other seat each may then be moved laterally and overlap (as seen from the front). The seating positions may be further improved by angling each seat away from their center arm rest area, reducing the encroaching effect of the overlap by pointing the passenger away from the overlap, reducing the visual impact of the staggered seating by pointing the passenger away from the nearest seat ahead, and improving leg room by directing the passenger's legs forward at an angle.

Abstract: An elevation-type armrest includes a driving assembly and a cushioning assembly. The driving assembly includes a worm, a crank, an axle, a shaft, a worm gear, two toothed wheels and two pinions. The crank is connected to the worm. The axle extends perpendicular to the worm. The worm gear is connected to the axle and engaged with the worm. The first toothed wheel is connected to the axle. The shaft extends parallel to the axle. The second toothed wheel is connected to the shaft and engaged with the first toothed wheel. The pinions are connected to two ends of the shaft. The cushioning assembly includes a supporting tube connected to two racks. Each of the racks includes a toothed portion movably located in a corresponding one of the cylinders and engaged with a corresponding one of the pinions.

Abstract: A toilet safety arm accessory device comprises a frame that fits around a toilet and a pair of arms coupled thereto allows a user to apply a pulling force onto the device to allow the user to seat him or herself onto a toilet and/or to rise therefrom. The device, which the user grips in lowering and raising himself on and from the toilet. The device may be installed onto a toilet without the use of any tools or hardware and thus does not result in any damage, destruction, or other modification to or of the subject toilet. The toilet safety arm accessory device may also comprise elements of the device that may be added to existing toilet safety devices to allow a user to apply a pulling force and otherwise improve leverage needed to lower him or herself from a toilet and/or raise him or herself from a toilet.

Abstract: A positionable platform for an interior of a vehicle comprising: a planar top surface; a bottom housing with a channel; and a releasable locking mechanism disposed between the planar top surface and the bottom housing. The releasable locking mechanism includes: a first bracket; a second bracket layered beside the first bracket; a button accessible for manipulation connected to the first bracket; a locked state where the second bracket extends into the channel; and an unlocked state where the movement of the button in a first direction causes movement of the first bracket in the first direction, which causes movement of the second bracket in a second direction different than the first direction that withdraws the second bracket from the channel or reduces the extension of the second bracket into the channel.

Abstract: An interbody spacer for the spine is provided. The interbody spacer includes a cage and at least one bone screw configured to anchor the cage between two vertebrae of the spine. The cage includes a lock rotationally movable with respect to the cage between a locked configuration and an unlocked configuration. When in an unlocked configuration, bone screws may be inserted and removed from the cage. When in a locked configuration, the insertion and removal pathway of the bone screw is blocked by the lock, thereby, providing backout protection for the bone screws. The lock is coupled to the cage by a pronged retainer and includes a camming surface to provide for incremental rotation of the lock. The lock includes a space-saving shape providing for maximum bone screw angulation on a laterally smaller anterior platform.

Abstract: An exemplary embodiment of the present disclosure relates to an armrest apparatus and an industrial vehicle including the same, and the armrest apparatus disposed in a driver seat includes: an armrest body which supports an operator's arm; and a drive unit which has a variable length, provides power to move the armrest body upward, and absorbs force applied in a direction in which the armrest body moves downward.

Abstract: A chair assembly includes a four-bar arrangement that includes a lower end and an upper end where the upper end is adjustable between a raised position and a lowered position, and an arm rest assembly adapted to support the arm of a seated user thereon and supported on an upper end of the four-bar arrangement, wherein the lower end of the four-bar arrangement is pivotably supported from an arm support structure for pivotable movement about an arm pivot axis, such that the upper end of the four-bar arrangement is movable between a first position and second position located laterally outward from the first position, and wherein the arm pivot axis is angularly offset from a vertical axis.

Abstract: A vehicle seat having a backrest, a seat extending in a transverse direction from a first side edge to a second side edge, and a seat module. The armrest module includes a body and an armrest supported by this body, and is able to move relative to the seat between a home position where the armrest laterally extends the seat or is lower than the seat so as to be able to receive an occupant, and a rest position where the armrest is higher than the seat so as to be able to receive the arm of the occupant sitting on the seat. The armrest module has a substantially flat shape in a vertical plane, and has a thickness extending in the transverse direction.

Abstract: The invention concerns an apparatus with inclination-adjustable pivoting element, a pivoting element, hinged on a support structure around a first axis of rotation to move between a first limit stop position and a second limit stop position. The apparatus comprises at least one abutment body, rotationally connected to the pivoting body and to the structure around the first axis and constrainable in rotation to the pivoting element. The abutment body stops the pivoting element in the first limit stop position by abutting against a first stop. The apparatus comprises: at least one body of constraint between the abutment body and the pivoting element, which may assume alternatively a constraint and a release configuration; and a control device, kinematically connected to the constraint body to move it between the two aforesaid positions. The inclination in the first limit stop position is adjusted by activating the control device and varying the inclination of the pivoting element.

Abstract: A height adjustment structure for an armrest contains: an accommodation sleeve for accommodating a fixer and a slider, a cap connected with a support arm, a pedestal, and a pull member. The pull member includes an extension extending out of a first window of the accommodation sleeve so as to pull an engagement protrusion to horizontally remove from or engage into one of multiple recesses of the fixer. The fixer includes a groove and two closed slots. The slider includes an extending lid, a second window, two tabs, a cutout, an elongated orifice, and an abutting protrusion. The pull member includes a receiving orifice, a spring, and a tilted orifice. The engagement protrusion abuts against the cutout and inserts into the one recess, and the engagement protrusion includes a column extending from a side thereof and inserted into the elongated orifice via the tilted orifice.

Abstract: A height adjustable chair armrest includes an armrest top portion and a supporting member coupled with a chair body. The supporting member includes an outer tube and an inner tube received in the outer tube. The inner tube includes a plurality of positioning holes. A resilient member is mounted in the inner tube and includes a body and a resilient plate slantingly branching from the body. A first peg is disposed on the body and is releasably engaged in one of the plurality of positioning holes. An actuation rod is insertable through the outer tube into an operational hole of the body to press against or release the resilient plate. A rib is disposed on an inner periphery of the inner tube and is spaced from a top end of the inner tube by a spacing. The resilient member is restrained at a side of the rib.

Abstract: An armrest assembly comprising a base structure and an upper structure that has an upper surface providing an armrest. The upper structure is movable with respect to the base structure between an upper position and a lower position under the control of a lockable actuator that is operable to lock the upper structure with respect to the base structure in any one of a plurality of adoptable positions. A second locking device is operable to lock the upper structure with respect to the base structure in at least one of the adoptable positions, the locking device including locking elements that inter-engage mechanically when the second locking device locks the upper structure with respect to said base structure.

Abstract: An armrest adjuster is revealed. The armrest adjuster includes an armrest disposed on a top surface of an armrest support. The armrest consists of an armrest pad, an armrest base connected to an armrest cover of the armrest pad to form an armrest body, a first component, a second component fixed between the armrest base and the top surface of the armrest support and arranged with a projecting shaft thereof in the fore-and-aft direction, a first shaft cover, a second shaft cover, and at least one damper. The armrest can not only be changed between a button-free mode and a button mode easily, but also can be installed optionally for adjustment in fore-and-aft direction or lateral direction, or rotation from side to side, with/or without damping action. Thereby the armrest is easy to be installed and the side-view height of the armrest can be reduced.

Abstract: A retractable interface assembly includes a base member defining a track and a track follower support member engaging the track and moving along the track between a retracted position and an extended position. A viewing angle detent mechanism pivotably connects an interface panel to the track follower support member and defines a plurality of angular positions of the interface panel relative to the track follower support member, including a storage angle position and a full up angle position, to fix the interface panel relative to the track follower support member in one of the plurality of angular positions. A position setting device sets a position of the track follower support member along the track of the base member. The set positions include the retracted position and the extended position of the track follower support member along the track of the base member.

Abstract: The armrest comprises an arm support that is vertically adjustable by an adjuster that is held on the vehicle frame. The adjustment takes place here independently of a storage compartment. In this way, the vertical position of the armrest can be adapted to the size of the occupants of the seat. The adjuster can be operated with a manual drive or electrically as an alternative, for example. The adjuster has a guide fixed to the vehicle frame and a slide that carries the arm support and that is vertically shiftable on the guide.

Abstract: An armrest locking mechanism includes a lever and an armrest lock. The lever is configured to unlock a movement of an armrest. The armrest lock is configured to unlock a movement of the lever.

Abstract: A headrest includes a reverse input blocking clutch and a displacement mechanism. The reverse input blocking clutch includes input and output shafts that respectively receive and output rotational torque, an outer ring and a side plate in which rotation is restricted, cylindrical rollers that control blocking of the rotational torque reversely input from the output shaft and transmission of the rotational torque from the input shaft through engagement and disengagement between the outer ring and output shaft, and a cage to retain the cylindrical rollers. The displacement mechanism has one end fixed to stays and another end fixed to a headrest main body positioned at a top of a seat back, and displaces the headrest main body through the rotational torque from the output shaft of the reverse input blocking clutch. The another end of displacement mechanism has the side plate of the reverse input blocking clutch mounted thereto.

Abstract: A rotary positioning device for an armrest includes a positioning member, a base, a sliding member, and a detent member. The positioning member includes a plurality of first engaging recesses formed at a side edge thereof. The base is rotatably connected to the positioning member. The sliding member is slidably arranged in base and is selectively switchable between a locked position and an unlocked position. The detent member is movably arranged in the base and is selectively engaged with one of the plurality of first engaging recesses to correspond to the locked position or the unlocked position of the sliding member.

Abstract: An armrest includes a shell convertible between a fixed position and a non-fixed position, a lock unit, and a control unit. The lock unit includes a base seat and two pivot gears, each of which has an arm segment and a gear segment having a plurality of first teeth. The control unit includes a rack having a plurality of second teeth and is operable to move between a locking position and an unlocking position. When the control unit is at the locking position, the second teeth mesh with the first teeth, the pivot gears are locked, and the shell is at the fixed position. When the control unit is at the unlocking position, the rack is away from the pivot gears, the pivot gears are pivotally rotatable, and the shell is at the non-fixed position.

Abstract: The armrest structure includes a connecting seat having a sleeve. A height adjustment rod is disposed in the sleeve and has two symmetric boards. Each of the boards is formed with recesses. A receiving room is formed between the two boards. An elevation rod is disposed in the sleeve. An end of the elevation rod has a projection received in the receiving room. Another end of the elevation rod has a connecting seat with a cylinder and a spring. An armrest set has a tube and an armrest connected atop the tube. The tube is received in the sleeve and sheathes the height adjustment rod and elevation rod. A top of the tube is formed with a channel for receiving a trigger. A fixing bar passes through the projection and is embedded into one of the recesses.

Abstract: An armrest apparatus includes an armrest arranged on one lateral side of a driver seat. A height adjustment mechanism adjusts a height of the armrest relative to the driver seat. A flip-up mechanism swingably supports the armrest about a swing shaft center oriented in a lateral direction relative to the driver seat, whereby the armrest can be flipped up from a use position to a non-use position. The armrest apparatus also allows for height adjustment based on the physique of a driver and has an armrest that is movable to a position unlikely to interfere with boarding and unboarding.

Abstract: An armrest, in particular for office chairs, comprising a support bracket (16) connected to the chair, a tube (34) connected to the vertical part (24) of said bracket, and an arm support pad, characterized in that the tube presents at one end a flange (36) comprising rotation guides for a plate (66), said plate presenting an aperture (66) for the insertion of the lower end of the tube and being provided with rotation guides (38) cooperating with said flange (36) for the rotation of said plate (66) about said tube (34), said plate (66) and said pad (80) being constrained by mutually cooperating slide guides (74, 78) which enable said pad (80) to translate relative to said plate (66) with said flange (36) interposed between them.

Abstract: The invention relates to a vehicle seat with a seat part, with a backrest and with a height-adjustable armrest, in which the height-adjustable armrest has an arm support part and a lever mechanism to lift or lower the arm support part with a stationary base component, with one or two pivot lever parts articulated to the base component and with a height-adjustable lower component articulated to the pivot lever parts to carry the arm support part, wherein the height-adjustable armrest is distinguished by a locking device to lock the lever mechanism with a first locking part arranged on the side of the base component and having a first locking tooth system, with a second locking part arranged on the side of the lower component and having a further locking tooth system , and with locking means, which are displaceably arranged in relation to the two locking parts by means of an actuating element in such a way that counter-locking tooth systems of the locking means can engage in the locking tooth systems of the loc

Abstract: An adjustable armrest with an central core with a longitudinal channel, a locking slide slidably received in the longitudinal channel, and locking members retained by the central core. The locking slide has a first position wherein the locking members are pressed to a position projecting outboard of the elongate central core and a second position wherein the locking members are permitted to retract within the elongate central core. An elongate core sleeve receives the elongate central core, and the core sleeve has a plurality of longitudinally spaced inlets and ridges. A first arm portion is fixed in relation to the elongate central core, and a second arm portion fixed in relation to the elongate core sleeve. The first arm portion can be extended and retracted in relation to the second arm portion by an actuation of the locking slide from the first position to the second position.

Abstract: Disclosed is an apparatus for adjusting the height of an armrest, capable of adjusting the heights of the arm rests arranged at the left and right sides of a driver's seat, respectively, in the vertical direction according to the physical condition of the driver.

Abstract: A height adjustment mechanism for a chair armrest contains: an inner tube, an adjusting member, an outer tube, a driving block, a fixing member, and a resilient element. The inner tube includes a base, an accommodating groove, and an elongated hole. The adjusting member includes a guiding slot, two toothed racks, and a plurality of guide teeth, wherein each guide tooth has a first crown portion, a first root portion, and a first bottom face. The outer tube includes a support plate an orifice. The driving block includes a pressing portion, two flanges, and plural positioning teeth, wherein a number of the plural positioning teeth is less than that of the plurality of guide teeth. The fixing member includes a first segment and a second segment. The resilient element is fixed in the inner tube and includes a first end abutting against the driving block and the fixing member.

Abstract: An adjustable armrest having a base and an armrest that are coupled together through an articulating joint assembly. The joint assembly includes a body with a first articulating ball joint and a second articulating ball joint. The first articulating ball joint is coupled to the armrest with the second articulating ball joint being coupled to the base.

Abstract: An armrest assembly is provided for adjusting an armrest of a seating unit in three degrees of motion. The armrest assembly includes an angle-adjustment mechanism that allows the armrest to pivot and to translate forward, and a lift mechanism that enables vertical articulation of the armrest. The angle-adjustment assembly includes a pivot bracket with a downwardly disposed pin and a shuttle with an arcuate slot to receive the pin. The arcuate slot includes contoured walls that form detents for restricting movement of the pin, thereby restraining rotation of the shuttle, with respect to the pivot bracket, to predefined angular positions. The lift mechanism includes a rack with ride element(s) extending therefrom and locking teeth, and a control bar with track(s). An upward manual actuation of the control bar causes the track to shift laterally and retract the locking teeth, via interaction between the track(s) and ride element(s), respectively.

Abstract: A child car seat has a seat back with an upper end and a head rest coupled to the seat back near the upper end. The head rest is vertically adjustable along the seat back between a raised position and a lowered position. The car seat has an adjustment mechanism with an actuator and a lock element. The lock element is movable between a locked condition preventing vertical adjustment of the head rest and an unlocked condition permitting vertical adjustment of the head rest. The actuator is actuable to reconfigure the adjustment mechanism between a locked arrangement blocking the lock element in the locked condition, a released arrangement unblocking the lock element from the locked condition, and an unlocked arrangement whereby the lock element is in the unlocked condition.

Abstract: The armrest assembly includes a connecting seat, an adjusting rod, a link and an armrest seat. The connecting seat has a connecting rod and a hollow connecting tube with a fixing hole. The adjusting rod has a ring and a bar. The bar is received in the connecting tube and formed with adjusting holes in a row. A fixing block is formed under the adjusting holes and inserted into the fixing hole. The link passes through the connecting tube. Two ends of the link are separately formed with a fixing insert for being inserted into one of the adjusting holes and a pushing button. The armrest seat has a support and an armrest. The support is received in the connecting tube and receives the link. The pushing button projects from a through hole of the support.

Abstract: A height-adjustable handrest has constituent components describe below. A middle bar element is inserted into a handrest external bar and has an internal space for containing a spring and an inner bar element. The handrest external bar is enclosed by a support unit with an upper end pivotally coupled to a press element. The press element has one end abutting against the inner bar element and has the other end protruding under an upward thrust from the spring. A pin passing through slots formed at the handrest external bar to penetrate oblong holes disposed at the inner bar element and the middle bar element, respectively. When pressed, the press element drives the inner bar element to move downward, thereby moving the pin upward along the inclined oblong hole of the inner bar element, compressing the spring downward, and moving the pin into a longitudinal channel of the handrest external bar.

Abstract: An armrest device for a chair includes a lower support rod that rises at a side of a chair seat and has a tubular upper end portion; and an upper support cylinder that has an armrest provided in an upper end thereof, is externally fitted to the lower support rod so as to be slidable in an up-down direction, and has a plurality of engaging portions therein. The armrest is made height-adjustable with respect to the lower support rod by disposing the locking member and a biasing member at an upper end portion of the lower support rod and providing the rotating rod inside the lower support rod.

Abstract: A chair assembly includes a four-bar linkage assembly including a first linkage member, a second linkage member, a third linkage member and a fourth linkage member each pivotably coupled to one another such that the four-bar linkage assembly includes an upper end that is adjustable between raised and lowered positions, and an arm rest assembly adapted to support the arm of a seated user thereon and supported the upper end of the four-bar linkage assembly, wherein a lower end of the four-bar linkage assembly is pivotably supported from an arm support structure for pivotable movement, such that the upper end of the four-bar linkage assembly is moveable between a first position and second position located laterally outward from the first position.

Abstract: A height adjustment mechanism for a chair armrest contains: an inner tube, an adjusting member, an outer tube, a driving block, a fixing member, and a resilient element. The inner tube includes a base, an accommodating groove, and an elongated hole. The adjusting member includes a guiding slot, two toothed racks, and a plurality of guide teeth, wherein each guide tooth has a first crown portion, a first root portion, and a first bottom face. The outer tube includes a support plate an orifice. The driving block includes a pressing portion, two flanges, and plural positioning teeth, wherein a number of the plural positioning teeth is less than that of the plurality of guide teeth. The fixing member includes a first segment and a second segment. The resilient element is fixed in the inner tube and includes a first end abutting against the driving block and the fixing member.