Adjustable armrest and method for the use thereof
An adjustable armrest includes a base member pivotable about a first horizontal axis in a side-to-side direction. An arm support member is connected to the base member. A first latch member includes a plurality of notches, while a second latch member includes a pawl shaped to releasably engage at least one of the plurality of notches. One of the first or second latch members is mounted on the base member, with the second latch member being moveable relative to the first latch member between at least one engaged position and a release position. In another aspect, a chair includes a pair of adjustable armrests. In another aspect, a method of adjusting the lateral position of an armrest is provided.
This application claims the benefit of U.S. Provisional Application No. 60/965,978, filed Aug. 23, 2007, the entire disclosure of which is hereby incorporated herein by reference.
FIELD OF THE INVENTIONThe present invention relates generally to an armrest, and in particular, to an adjustable armrest, a chair incorporating such an armrest and the method for the use thereof.
BACKGROUNDChairs of the type typically used in offices and the like often are configured with armrests. In many instances, the armrests are provided with vertical adjustability. In some instances, an upper portion of the armrest is provided with lateral adjustability, such that an arm pad can be moved side-to-side to accommodate users having different body widths. Typically, however, the armrest includes a stem that is not laterally moveable, such that lateral adjustment of the upper portion does not provide more or less room between the stems, for example to accommodate a large individual with wide legs. Conversely, stems that are spaced too far apart can take up excess room, for example when chairs are situated around a conference table. Therefore, while the lateral adjustment of the upper portion of an armrest may provide for a variety of reconfigurable positions to accommodate a range of users, the fixed positions and/or configurations of the stems may not be ideally suited for a wide cross-section of users and/or applications.
In addition, the actuation of armrests, whether for vertical or lateral adjustment, often requires independent actuation of a trigger or release mechanism that allows the armrest to be moved. Such triggers, however, may not be easily located by a user unfamiliar with a particular chair, or may be difficult to actuate, for example, by someone of limited dexterity and strength.
SUMMARYThe present inventions are defined by the claims, and nothing in this section should be read as a limitation on those claims. Rather, by way of general introduction and briefly stated, various embodiments are described that relate to an adjustable armrest, chairs incorporating such an armrest, and/or the method for the use thereof.
For example and without limitation, in one aspect, one embodiment of an adjustable armrest includes a base member pivotable about a first horizontal axis oriented in a fore-and-aft direction, wherein the base member is pivotable about the axis in a side-to-side direction. An arm support is connected to the base member and includes an armrest support extending in the fore-and-aft direction. A first latch member includes a plurality of notches, while a second latch member includes a pawl shaped to releasably engage at least one of the plurality of notches. One of the first or second latch members is mounted on the base member, with the second latch member being moveable relative to the first latch member between at least one engaged position and a release position. In the engaged position, the pawl is engaged with at least one of the plurality of notches such that the base member is prevented from pivoting about said first horizontal axis. In the release position, the pawl is disengaged from the plurality of notches such that the base member is pivotable about the first horizontal axis.
In another aspect, a chair includes a pair of adjustable armrests and a seat having a longitudinally spaced front and back and laterally spaced opposite sides. The pair of armrests are positioned along the opposite sides of the seat and are pivotable in a side-to-side direction about a longitudinally extending horizontal axis.
In another aspect, a method of adjusting the position of an armrest includes pulling up on an upper portion of the armrest, pivoting the armrest about a horizontal axis in a side-to-side direction toward and away from a side of a seat to a desired lateral position, and releasing the upper portion of the armrest. In one embodiment, the method further includes adjusting a height of the armrest.
In another aspect, a method of adjusting the position of an armrest includes pivoting the armrest about a horizontal axis in side-to-side direction toward and away from a side of a seat to a desired position while free of any load being applied downwardly to the armrest. The method further includes pushing down on the armrest and thereby locking the armrest such that the armrest is prevented from pivoting about the horizontal axis. Locking the armrest is automatically performed by pushing down on the armrest free of any independent actuation of any locking mechanism.
The various aspects and embodiments provide significant advantages over other armrests, chairs and methods for the user thereof. For example, and without limitation, the lateral position of the entire armrest can be easily adjusted to accommodate different users, while providing a chair with a variable width footprint. In addition, the lateral position of the armrests can be easily adjusted without a separate, independent actuation of a trigger mechanism, while at the same time providing rigid support when loaded.
Of course, it should be understood that the various aspects disclosed herein can be used individually or in combination, with various combinations providing additional advantages. The present invention, together with further objects and advantages, will be best understood by reference to the following detailed description taken in conjunction with the accompanying drawings.
The terms “longitudinal” and “lateral” as used herein are intended to indicate the directions 50, 52 of the chair from front to back and from side to side, respectively. Similarly, the terms “front”, “side”, “back”, “forwardly”, “rearwardly”, “upwardly” and “downwardly” as used herein are intended to indicate the various directions and portions of the chair as normally understood when viewed from the perspective of a user sitting in the chair. It should be understood that the terms “mounted,” “connected”, “coupled,” “supported by,” and variations thereof, refer to two or more members or components that are joined, engaged or abutted, whether directly or indirectly, for example, by way of another component or member, and further that the two or more members, or intervening member(s) can be joined by being integrally formed, or by way of various fastening devices, including for example and without limitation, mechanical fasteners, adhesives, welding, press fit, bent-over tab members, etc. The term “plurality” means two or more.
As shown in
It should be understood that in other embodiments (not shown), the chair can include other types of support structures, including three or more fixed legs, sled bases, and other known structures. In addition, it should be understood that the chair can be configured with a seat and back that tilt together but at different rates, or with a seat and back that are fixed and tilt together at the same rate. In other embodiments, the seat may remain fixed, with the back tilting by itself, or with both the seat and back being fixed. It should be understood that an armrest can be connected to the support structure for any of these types of chairs, or other seating structures, including without limitation vehicular and airplane seating, carts, bicycles, wheelchairs, stadium seating or any other type of body support structures having a seating surface.
Armrest Assembly:Referring to the drawings,
The lower arm support 26, otherwise referred to as a base member, is configured with an inwardly extending flange 54. A latch member 56 is mounted to the flange 54, with a pair of shims 58 secured to the latch member. The latch member 56 includes a rack 60, configured as a plurality of notches 74 defined by teeth formed along a top thereof. The latch member 56 is fixedly mounted to the support structure 12 in a non-rotatable relationship using the shims 58, with the base member 26, including the flange 54, being pivotally mounted to the latch member 56 and support structure about a main pivot axis 62. The pivot axis 62 extends substantially horizontally along the longitudinal (fore-and-aft) direction 50. In this way, the lower arm support or base member 26, and connected upper arm support 24, are pivotable about the main pivot axis 62 in a side-to-side direction so as to accommodate users of different widths. The flange 54 is provided with slots 64 of varying length as a function of the distance from the pivot axis 62, such that the lower arm support 26 can pivot relative to the latch member 56. A pair of covers 117, separate from or integral with the lower arm support, are also configured with slots 64.
A second latch member 66 is pivotally mounted to the base member 26, and in particular the flange 54, about a second pivot axis 72, also running in the fore-and-aft or longitudinal direction 50. The pivot axis 72 is spaced apart, preferably inwardly and/or upwardly, from the main pivot axis 62. The second latch member 66 includes a downwardly extending pawl 68 that is shaped to engage at least one of the notches 74 of the rack 60 of the latch member 56. The term “pawl” as used herein means any protuberance, projection, detent or other member capable of mating with and/or engaging a corresponding opening or projection/protuberance, such as a notch, tooth, etc. A distal end 70 of the latch member 66 is inserted into the opening 48 formed in the rack 42 and is constrained by the rack 42. It should be understood that in an alternative embodiment the position of the pawl and rack can be reversed on the two latch members 56, 66. In yet another embodiment, a pivotable latch member, having a pawl or rack, is pivotally connected to the support structure, and a latch member fixed relative to the support structure and having a mating rack or pawl, is moveably connected to the base member or lower arm support such that the latch member remains pivotally stationary as the base member pivots.
In an alternative embodiment, shown in
Referring to
The upper arm support 24 includes an elongated armrest support 80 extending forwardly from the stem, and also rearwardly a lesser amount. As shown in
An actuator member 98 includes a head 100 that is connected to the spring plate 90 intermediate the free end 94 and the fixed end 92. A necked portion 102 of the head is inserted into a slot 96 to connect the actuator and spring plate. The actuator includes an elongated shaft 104. An annular flange 106 extends transversely from the shaft below the head and slideably engages the interior side walls of the cavity 134 of the upper arm support, or stem, so as to stabilize the actuator. A lower end 112 of the actuator includes a tapered cavity 108 with a slotted opening formed therein. A pawl 110, configured as a bullet shape, is slideably secured to the lower end 112 of the actuator, for example in a track, and extends through an opening 113 in the stem 76. The pawl 110 is slideable along the tapered surface 114 of the cavity such that the pawl is extended or retracted transversely relative to the actuator shaft and rack 42 as the shaft moves down and up respectively in response to actuation of the trigger 86. In an alternative embodiment, the pawl 110 is not attached to the actuator, but rather simply is inserted through the opening 113 in the stem 76, and is biased in and out of engagement with the rack simply by movement of the rack and a tapered opening behind the pawl, thereby allowing it to move out of engagement with the rack. The pawl 110 is releasably engaged with one of the notches 46 formed in the rack to secure the upper arm support 24 in a desired vertical (height) position relative to the lower arm support 26. Instead of the spring plate, or in addition thereto, a spring 115 is attached to the bottom of the actuator as shown in
It should be understood that when the upper support member pawl 110 is engaged with the rack 42, the upper support member 24 is “coupled” to the latch member 166 by way of the rack 42. Of course, when the upper support member pawl 110 is disengaged with the rack 42, for example when the height of the armrest is being adjusted, the upper support member is not coupled to the latch member 66, such that the pawl 68 remains engaged with at least one of the notches 74 on the latch member 56. In this way, an adjustment of the height of the armrest, by pulling up on the armrest with the trigger 86 depressed, does not inadvertently disengage the latch members 66, 56 thereby allowing the armrest also to move side-to-side. At the same time, it should be understood that even when the upper support member pawl 110 is engaged with the rack 42, the upper support member 24 is moveable in a vertical direction relative to the lower support member 26 a small amount so as to allow the rack 42 to move and disengage the pawl 68 from the latch member 56.
Referring to the embodiment of
In another aspect of the embodiment shown in
In yet another embodiment shown in
The upper and lower arm supports, or various components thereof such as the tubular structure, flange and rack, are preferably made of plastic, for example nylon 33% GF BASF Capron 8223G HS, although it should be understood that they can be made of other materials, such as metal with the flange being welded to a tubular structure (see
In operation, and referring to the embodiments of
Referring to the armrest embodiment of
Alternatively, in the various embodiments, the user can simply push the armrest sideways so as to overcome the spring force and bump the latch member 66, 380 to another location as long as a downward force is not being applied.
In some embodiments, such as in
The armrest embodiment of
In any of the embodiments, when the user pushes down on the armrest 22, for example when exiting the chair or when working with their arms resting on the armrests, the latch members 56, 66, 166, 256, 292, 380, 386 are firmly engaged and prevent any rotation of the armrest in a lateral direction. In addition, when no load is applied to the armrest, one or more springs bias the latch members into engagement such that the lateral position of the armrest is not inadvertently changed.
Operation of Height Adjustment:In operation, and referring to the embodiments of
In addition, as explained above, when the pawl 110 is disengaged with the rack 42, for example when the height of the armrest is being adjusted, the upper support member 24 is not coupled to the latch member 66, such that the pawl 68 remains engaged with the rack 74 on the latch member 56. In this way, an adjustment of the height of the armrest by pulling up on the armrest with the trigger depressed does not inadvertently disengage the latch members 66, 56 thereby allowing the armrest also to move side-to-side.
Although the present invention has been described with reference to preferred embodiments, those skilled in the art will recognize that changes may be made in form and detail without departing from the spirit and scope of the invention. As such, it is intended that the foregoing detailed description be regarded as illustrative rather than limiting and that it is the appended claims, including all equivalents thereof, which are intended to define the scope of the invention.
Claims
1. An adjustable armrest comprising:
- a base member pivotable about a first horizontal axis oriented in a fore-and-aft direction, wherein said base member is pivotable about said axis in a side-to-side direction;
- an arm support connected to said base member and comprising an elongated armrest support extending in the fore-and-aft direction;
- a first latch member comprising a plurality of notches; and
- a second latch member comprising a pawl shaped to releasably engage at least one of said plurality of notches, wherein one of said first or second latch members is mounted on said base member, wherein said second latch member is moveable relative to said first latch member between at least one engaged position, wherein said pawl is engaged with at least one of said plurality of notches such that said base member is prevented from pivoting about said first horizontal axis, and a release position, wherein said pawl is disengaged from said plurality of notches such that said base member is pivotable about said first horizontal axis.
2. The armrest of claim 1 wherein said arm support comprises a stem moveably connected to said base member, wherein said stem and said base member are vertically moveable relative to each other.
3. The armrest of claim 2 wherein said armrest support is connected to an upper portion of said stem.
4. The armrest of claim 2 wherein said stem is coupled to said second latch member, wherein said second latch member is moveable to said release position in response to an upward movement of said movement of said stem.
5. The armrest of claim 4 wherein one of said stem or said base member comprises a second plurality of notches and the other of said stem or base member comprises a second pawl, wherein said second pawl is moveable relative to said second plurality of notches between at least one engaged position, wherein said second pawl is engaged with at least one of said plurality of second notches and said stem is coupled to said second latch member, and a release position, wherein said second pawl is disengaged from said second plurality of notches and said stem is decoupled from said second latch member.
6. The armrest of claim 5 wherein said stem further comprises a trigger connected to an actuator member, wherein said actuator member comprises said second pawl and wherein said second plurality of notches are disposed on said base member.
7. The armrest of claim 5 further comprising a rack configured with said second plurality of notches, wherein said rack is moveably mounted to said base member and wherein said second pawl is moveable relative to and engageable with said rack.
8. The armrest of claim 7 further comprising a spring biasing said rack in a downward direction.
9. The armrest of claim 7 wherein said rack is engaged with said second latch member, wherein said second latch member is moveable between said engaged and release positions as said rack is moveable between at least a first position and a second position.
10. The armrest of claim 2 wherein at least a portion of said stem has a curved shape, with said stem having an inner concave contour and an outer convex contour.
11. The armrest of claim 1 wherein said one of said base member or said first latch member comprises an indexing member engaged with at least one of a plurality of second notches formed on the other of said base member or said first latch member.
12. The armrest of claim 1 wherein said second latch member is rotatably mounted to said base member about a second horizontal axis spaced from said first horizontal axis.
13. A chair comprising:
- a seat having a longitudinally spaced front and back and laterally spaced opposite sides; and
- a pair of armrests positioned along said opposite sides of said seat, each of said armrests comprising: a base member pivotable about a longitudinally extending horizontal axis; an arm support connected to said base member, wherein said arm support and said base member are pivotable about said horizontal axis toward and away from one of said sides of said seat; a first latch member comprising a plurality of notches; and a second latch member comprising a pawl shaped to releasably engage at least one of said plurality of notches, wherein one of said first or second latch members is mounted on said base member, wherein said second latch member is moveable relative to said first latch member between at least one engaged position, wherein said pawl is engaged with at least one of said plurality of notches such that said base member is prevented from pivoting about said first horizontal axis, and a release position, wherein said pawl is disengaged from said plurality of notches such that said base member is pivotable about said first horizontal axis.
14-24. (canceled)
25. A method of adjusting the position of an armrest comprising:
- pulling up on an upper portion of said armrest;
- pivoting said armrest about a horizontal axis in a side-to-side direction toward and away from a side of a seat to a desired lateral position; and
- releasing said upper portion of said armrest.
26. The method of claim 25 wherein said pulling up on said upper portion of said armrest is performed free of any actuation of any release mechanism.
27. The method of claim 25 further comprising pushing down on said upper portion of said armrest and thereby locking said armrest such that said armrest is prevented from pivoting about said horizontal axis.
28. The method of claim 27 wherein said locking said armrest is automatically performed by said pushing down on said upper portion free of any independent actuation of any locking mechanism.
29. The method of claim 25 further comprising moving an armrest vertically between a plurality of height positions and locking said armrest at a desired one of said plurality of height positions, wherein said pulling up on said upper portion of said armrest is carried out while said armrest is locked at any one of said plurality of height positions, wherein said armrest is laterally adjustable when locked at any one of said plurality of height positions.
30. The method of claim 29 wherein said moving said armrest vertically between said plurality of height positions further comprises actuating a trigger and moving said upper portion of said armrest between said plurality of height positions, releasing said trigger and thereby maintaining said armrest at said desired one of said height positions.
31. A method of adjusting the position of an armrest comprising:
- pivoting said armrest about a horizontal axis in a side-to-side direction toward and away from a side of a seat to a desired position free of any load being applied downwardly to said armrest; and
- pushing down on said armrest and thereby locking said armrest such that said armrest is prevented from pivoting about said horizontal axis, wherein said locking said armrest is automatically performed by said pushing down on said armrest free of any independent actuation of any locking mechanism.
32. A chair comprising:
- a seat having a longitudinally spaced front and back and laterally spaced opposite sides; and
- a pair of armrests positioned along said opposite sides of said seat, each of said armrests comprising: a lower support pivotable about a longitudinally extending horizontal axis; and an upper support connected to said lower support, wherein said upper support and said lower support are pivotable about said horizontal axis toward and away from one of said respective sides of said seat, and wherein said upper support is moveably connected to said lower support in a substantially vertical direction such that the height of such upper support is adjustable relative to said lower support.
Type: Application
Filed: Aug 20, 2008
Publication Date: Apr 30, 2009
Inventors: Jeffrey A. Weber (Golden Valley, MN), Jason Holt (Minneapolis, MN), John F. Aldrich (Grandville, MI), Timothy A. Hoogland (Zeeland, MI), Robert W. Roth (Holland, MI), Robert M. Seeley (Zeeland, MI)
Application Number: 12/229,223
International Classification: A47C 7/54 (20060101);