# US 2017/0280877 A1 · Height-adjustable armrest > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2017/0280877 A1 - Document ID: US20170280877A1 - Status: Published application - Kind: A1 - Application number: 15/473,931 - Filed: 2017-03-30 - Published: 2017-10-05 - Earliest claimed: 2016-03-30 - Assignees: Bock 1 GmbH & Co. KG - Applicants: Bock 1 GmbH & Co. KG - Inventors: HERMANN BOCK - Web page: https://patentgrep.com/patent/US20170280877A1 ## CPC - A47C 1/0305: {by peg-and-notch or pawl-and-ratchet mechanism} - A47C 1/03: the parts being arm-rests - A47C 1/0308: {adjustable by rotation} - A47C 7/54: Supports for the arms - A47C 7/541: {of adjustable type (adjustable arm-rests of reclining or easy chairs A47C1/03)} - F16H 21/06: which can be made ineffective when desired - F16H 21/44: for conveying or interconverting oscillating or reciprocating motions - A47C: CHAIRS; SOFAS; BEDS - F16H: GEARING ## Abstract A height-adjustable armrest for a chair, in particular an office chair, has an arm support, which is retained by an armrest holder. The armrest holder is pivotable and a pivoting causes the armrest to be adjusted in height. An arresting device fixes the armrest holder in a height position. The arresting device is arranged at the upper, alterable-height end of the armrest holder and has a linearly movable latching element. The latching element is connected via a guide element to the armrest holder such that each pivoting movement of the armrest holder induces a linear movement of the latching element. ## Claims ### Claim 1 A height-adjustable armrest for a chair, comprising: an armrest holder; an arm support being retained by said armrest holder, said armrest holder being pivotable, a pivoting causing the height-adjustable armrest to be adjusted in height; a guide element; and an arresting device for fixing said armrest holder in a height position, said arresting device disposed at an upper, alterable-height end of said armrest holder and having a linearly movable latching element, said linearly movable latching element being connected via said guide element to said armrest holder such that each pivoting movement of said armrest holder induces a linear movement of said linearly movable latching element. ### Claim 2 (depends on 1) The height-adjustable armrest according to claim 1, wherein said linearly movable latching element is connected to said armrest holder such that prevention of the linear movement as a result of said linearly movable latching element being secured causes prevention of the pivoting movement and thus fixing of said armrest holder in the height position. ### Claim 3 (depends on 1) The height-adjustable armrest according to claim 1, wherein said guide element is connected to said armrest holder in a region of said upper, alterable-height end of said armrest holder. ### Claim 4 (depends on 1) The height-adjustable armrest according to claim 1, further comprising wherein said armrest holder has at least one supporting arm which is articulated, on the one hand, on a part of a chair frame, a first pivot pin being formed in the process, and, on the other hand, on said arm support, a second pivot pin being formed in the process, wherein said supporting arm is connected to said guide element in an articulated manner at a point of rotation, which is spaced apart from said first and second pivot pins, such that pivoting of said supporting arm is converted into a back and forth movement of said guide element. ### Claim 5 (depends on 4) The height-adjustable armrest according to claim 4, further comprising a guide arm, the point of rotation is provided by said guide arm which projects out of a basic elongate shape of said supporting arm. ### Claim 6 (depends on 5) The height-adjustable armrest according to claim 5, wherein said point of rotation is disposed in a vicinity of said second pivot pin being an upper pivot pin. ### Claim 7 (depends on 1) The height-adjustable armrest according to claim 1, further comprising a linear guide, said guide element acts directly on said linearly movable latching element and guides said linearly movable latching element back and forth in said linear guide, wherein the linear movement of said linearly movable latching element runs parallel to a longitudinal direction of said arm support. ### Claim 8 (depends on 1) The height-adjustable armrest according to claim 1, further comprising a triggering device; and wherein said arresting device has a locking element which, in a height-fixing rest position, is in engagement with said linearly movable latching element and said locking element, in order for a height of the height-adjustable armrest to be adjusted by actuating of said triggering device, said locking element can be shifted from a rest position into an adjustment position, in which said locking element is disengaged from said linearly movable latching element, wherein said locking element can be moved transversely to a direction of the linear movement of said linearly movable latching element. ### Claim 9 (depends on 8) The height-adjustable armrest according to claim 8, further comprising at least one spring element acting on said locking element and ensures that said locking element remains in the rest position. ### Claim 10 (depends on 9) The height-adjustable armrest according to claim 9, wherein said triggering device has a pushbutton which, when actuated, acts on said locking element and shifts said locking element counter to a spring force of said at least one spring element, into the adjustment position. ### Claim 11 (depends on 1) The height-adjustable armrest according to claim 1, wherein said armrest holder is configured to form a parallelogram guide such that a position of said arm support, irrespective of the height position, remains unaltered. ### Claim 12 (depends on 1) The height-adjustable armrest according to claim 1, wherein the height-adjustable armrest is for an office chair.