# US 11,076,694 B2 · Slide rail assembly > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,076,694 B2 - Document ID: US11076694B2 - Status: Granted - Kind: B2 - Application number: 16/795,789 - Filed: 2020-02-20 - Published: 2021-05-20 - Granted: 2021-08-03 - Earliest claimed: 2019-11-18 - Assignees: King Slide Works Co., Ltd.; King Slide Technology Co., Ltd. - Applicants: King Slide Works Co., Ltd.; King Slide Technology Co., Ltd. - Inventors: Ken-Ching Chen; Shun-Ho Yang; Tzu-Cheng Weng; Chun-Chiang Wang - Web page: https://patentgrep.com/patent/US11076694B2 ## CPC - A47B 88/443: Successive movement of rails within drawer slides, i.e. at least one rail element is not moving during the movement of other elements - A47B 88/493: with rollers, ball bearings, wheels, or the like - A47B 88/49: with double extensible guides or parts - A47B 88/497: with other guiding mechanisms, e.g. scissor mechanisms - H05K 7/1489: {characterized by the mounting of blades therein, e.g. brackets, rails, trays (H05K7/1491 takes precedence)} - A47B 2210/007: Three slide synchronisation - A47B: TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE (furniture jointing F16B) - H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS ## Abstract A slide rail assembly includes a first rail, a second rail, a third rail and a switch member. The second rail is movably mounted between the first rail and the third rail. The switch member is configured to be switched between a first state and a second state. When the switch member is in the second state, the second rail is configured to be driven by the third rail to move to a predetermined position along a retracting direction. When the third rail is moved relative to the second rail at the predetermined position along an extending direction, the switch member is configured to be switched from the second state to the first state. ## Claims ### Claim 1 A slide rail assembly, comprising: a first rail; a second rail movable relative to the first rail; a third rail movable relative to the second rail, the third rail being arranged with a driving structure and a front contact feature; and a switch member movable relative to the second rail and configured to be in one of a first state and a second state, wherein the switch member is arranged with a switch part; wherein when the second rail is located at a first extended position relative to the first rail, the switch member is operable to switch from the first state to the second state; wherein when the third rail is moved from a second extended position along a retracting direction and when the switch member is in the second state, the switch part of the switch member is configured to block a moving path of the driving structure, and the driving structure of the third rail is configured to continuously push the switch member in the second state along the retracting direction to drive the second rail to move to a predetermined position along the retracting direction; wherein when the third rail is moved a predetermined extended distance relative to the second rail at the predetermined position along an extending direction, the third rail is configured to drive the switch member to switch from the second state to the first state through the front contact feature. ### Claim 2 (depends on 1) The slide rail assembly of claim 1, wherein the third rail is further arranged with a rear contact feature; when the third rail is detached from a passage of the second rail along the extending direction and when the switch member is switched from the first state to the second state, the third rail is configured to drive the switch member to switch from the second state to the first state through the rear contact feature during a process of the third rail being remounted to the passage of the second rail along the retracting direction. ### Claim 3 (depends on 2) The slide rail assembly of claim 2, wherein the second rail is movably mounted between the first rail and the third rail, and the second rail has a first side and a second side; and wherein the first side of the second rail faces the first rail, and the second side of the second rail faces the third rail. ### Claim 4 (depends on 3) The slide rail assembly of claim 3, wherein the second rail has a first limiting part, a second limiting part and a space defined between the first limiting part and the second limiting part, and the space is communicated with the first side and the second side of the second rail; the switch member is pivotally connected to the first side of the second rail through a shaft member, and the switch part is configured to pass through a portion of the space from the first side of the second rail to extend to the second side of the second rail. ### Claim 5 (depends on 4) The slide rail assembly of claim 4, wherein when the switch member is in the second state, the switch part of the switch member, the driving structure, the front contact feature and the rear contact feature are located at a substantially same horizontal position. ### Claim 6 (depends on 4) The slide rail assembly of claim 4, wherein one of the front contact feature of the third rail and the switch part of the switch member has a guiding surface. ### Claim 7 (depends on 4) The slide rail assembly of claim 4, wherein one of the rear contact feature of the third rail and the switch part of the switch member has a guiding surface. ### Claim 8 (depends on 1) The slide rail assembly of claim 1, wherein when the second rail is located at the predetermined position and when the driving structure of the third rail contacts the switch member in the second state, the third rail is prevented from being moved relative to the second rail along the retracting direction. ### Claim 9 (depends on 8) The slide rail assembly of claim 8, wherein when the switch member is in the first state, the driving structure of the third rail is spaced from the switch member, so as to allow the third rail to be moved relative to the second rail along the retracting direction to a fully-retracted position. ### Claim 10 (depends on 1) The slide rail assembly of claim 1, wherein when the second rail is located at the first extended position relative to the first rail, the slide rail assembly has a first length; and wherein when the second rail is located at the predetermined position relative to the first rail, the slide rail assembly has a second length smaller than the first length. ### Claim 11 (depends on 1) The slide rail assembly of claim 1, further comprising a front base arranged on the first rail, and a first engaging mechanism arranged on the second rail; wherein the front base comprises a blocking feature; wherein when the second rail is located at the first extended position, the first engaging mechanism is located adjacent to the blocking feature of the front base, in order to prevent the second rail from being moved from the first extended position along the retracting direction; wherein the first engaging mechanism comprises a first engaging member and a first elastic member configured to provide an elastic force to the first engaging member; wherein when the second rail is located at the first extended position, the first engaging member is located adjacent to the blocking feature of the front base in response to the elastic force of the elastic member. ### Claim 12 (depends on 11) The slide rail assembly of claim 11, further comprising a rear base arranged on the first rail, and a second engaging mechanism arranged on the second rail; wherein when the second rail is moved from the first extended position to the predetermined position along the retracting direction, the second rail is engaged with the rear base through the second engaging mechanism, in order to prevent the second rail from being moved from the predetermined position along the extending direction; wherein the second engaging mechanism comprises a second engaging member and a second elastic member configured to provide an elastic force to the second engaging member; wherein when the second rail is located at the predetermined position, the second engaging member is configured to be engaged with the rear base in response to the elastic force of the second elastic member. ### Claim 13 A slide rail assembly, comprising: a first rail; a second rail movable relative to the first rail; a third rail movable relative to the second rail, the third rail being arranged with a driving structure and a front contact feature; and a switch member movable relative to the second rail to be in one of a first state and a second state, wherein the switch member is arranged with a switch part; wherein the switch member is operable to switch from the first state to the second state; wherein the second rail is configured to be located at a predetermined position relative to the first rail; wherein when the second rail is located at a predetermined position relative to the first rail, and when the switch member is switched from the first state to the second state, the third rail is configured to drive the switch member to switch from the second state to the first state through the front contact feature during a process of the third rail being moved a predetermined extended distance relative to the second rail at the predetermined position along an extending direction; wherein when the second rail is located at a first extended position relative to the first rail, the switch member is operable to switch from the first state to the second state; wherein when the third rail is moved from a second extended position along a retracting direction and when the switch member is in the second state, the switch part of the switch member is configured to block a moving path of the driving structure, and the driving structure of the third rail is configured to continuously push the switch member in the second state along the retracting direction to drive the second rail to move to the predetermined position along the retracting direction. ### Claim 14 (depends on 13) The slide rail assembly of claim 13, wherein the second rail is movably mounted between the first rail and the third rail, and the second rail has a first side and a second side; wherein the first side of the second rail faces the first rail, and the second side of the second rail faces the third rail; wherein the second rail has a first limiting part, a second limiting part and a space defined between the first limiting part and the second limiting part, and the space is communicated with the first side and the second side of the second rail; wherein the switch member is pivotally connected to the first side of the second rail through a shaft member, and the switch part is configured to pass through a portion of the space from the first side of the second rail to extend to the second side of the second rail. ### Claim 15 (depends on 13) The slide rail assembly of claim 13, further comprising a front base arranged on the first rail, and a first engaging mechanism arranged on the second rail; wherein the front base comprises a blocking feature; wherein when the second rail is located at the first extended position, the first engaging mechanism is located adjacent to the blocking feature of the front base, in order to prevent the second rail from being moved from the first extended position along the retracting direction; wherein the slide rail assembly further comprises a rear base arranged on the first rail, and a second engaging mechanism arranged on the second rail; wherein when the second rail is moved from the first extended position to the predetermined position along the retracting direction, the second rail is configured to be engaged with the rear base through the second engaging mechanism, in order to prevent the second rail from being moved from the predetermined position along the extending direction. ### Claim 16 A slide rail assembly, comprising: a first rail; a second rail movable relative to the first rail; a third rail movably mounted to a passage of the second rail to be movable relative to the second rail, the third rail being arranged with a driving structure and a rear contact feature; and a switch member movable relative to the second rail to be in one of a first state and a second state, wherein the switch member is arranged with a switch part; wherein when the third rail is detached from the passage of the second rail along an extending direction and when the switch member is switched from the first state to the second state, the third rail is configured to drive the switch member to switch from the second state to the first state through the rear contact feature during a process of the third rail being remounted to the passage of the second rail along a retracting direction; wherein when the second rail is located at a first extended position relative to the first rail, the switch member is operable to switch from the first state to the second state; wherein when the third rail is moved from a second extended position along the retracting direction and when the switch member is in the second state, the switch part of the switch member is configured to block a moving path of the driving structure, and the driving structure of the third rail is configured to continuously push the switch member in the second state along the retracting direction to drive the second rail to move to the predetermined position along the retracting direction. ### Claim 17 (depends on 16) The slide rail assembly of claim 16, wherein the second rail is movably mounted between the first rail and the third rail, and the second rail has a first side and a second side; wherein the first side of the second rail faces the first rail, and the second side of the second rail faces the third rail; wherein the second rail has a first limiting part, a second limiting part and a space defined between the first limiting part and the second limiting part, and the space is communicated with the first side and the second side of the second rail; wherein the switch member is pivotally connected to the first side of the second rail through a shaft member, and the switch member is arranged with a switch part passing through a portion of the space from the first side of the second rail to extend to the second side of the second rail. ### Claim 18 (depends on 17) The slide rail assembly of claim 17, further comprising a front base arranged on the first rail, and a first engaging mechanism arranged on the second rail; wherein the front base comprises a blocking feature; wherein when the second rail is located at the first extended position, the first engaging mechanism is located adjacent to the blocking feature of the front base, in order to prevent the second rail from being moved from the first extended position along the retracting direction. ### Claim 19 (depends on 18) The slide rail assembly of claim 18, further comprising a rear base arranged on the first rail, and a second engaging mechanism arranged on the second rail; wherein when the second rail is moved from the first extended position to the predetermined position along the retracting direction, the second rail is configured to be engaged with the rear base through the second engaging mechanism, in order to prevent the second rail from being moved from the predetermined position along the extending direction.