A slide rail assembly includes first to third rails and an engaging mechanism movably mounted on the second rail. The second rail is displaceable with respect to the first rail, and the third rail is displaceable with respect to the second rail. The three rails define a length when the second rail is displaced from a first to a second position in a first direction and the third rail, to a third position in the same direction, extending out of the second rail. Once the second rail is displaced from the second to a fourth position in a second direction, the length is reduced, and the second rail is kept at the fourth position by the engaging mechanism.

A slide rail comprises a longitudinal body and a pair of longitudinal supporting structures extended from two sides of the longitudinal body. Each of the supporting structures has a U-shaped cross section and includes a first supporting arm and a second supporting arm bent relative to the first supporting arm. A ball raceway is formed on one of the first supporting arm and the second supporting arm.

A slide rail assembly includes a first rail, a second rail, a third rail, a locking member and an operating member. The second rail is movable relative to the first rail between a first position and a second position. The third rail is movable relative to the second rail. The locking member is mounted to the second rail. When the second rail is located at the second position, the locking member is configured to lock a portion of the first rail, such that the second rail is not movable relative to the first rail from the second position toward the first position. The operating member is configured to be operated by a user to unlock the portion of the first rail from the locking member.

A slide rail assembly includes first to third rails and an engaging mechanism movably mounted on the second rail. The second rail is displaceable with respect to the first rail, and the third rail is displaceable with respect to the second rail. The three rails define a length when the second rail is displaced from a first to a second position in a first direction and the third rail, to a third position in the same direction, extending out of the second rail. Once the second rail is displaced from the second to a fourth position in a second direction, the length is reduced, and the second rail is kept at the fourth position by the engaging mechanism.

A mounting device is configured to mount a carried object to a connecting board. The connecting board is arranged with a mounting hole for mounting a positioning member of the carried object. The mounting device includes a blocking portion, an operating portion, and a base portion. The blocking portion is adjacent to the mounting hole of the connecting board. The operating portion is operatively connected to the blocking portion. The base portion has a first section connected to the connecting board, and a second section connected to the blocking portion. Wherein, when the positioning member of the carried object enters the mounting hole of the connecting board, the blocking portion is configured to block the positioning member; and when the operating portion is operated to move the blocking portion away from the mounting hole of the connecting board, the positioning member is able to disengage from the mounting hole.

Slide assemblies that include at least an inner slide segment and an outer slide segment. Many of the slide assemblies also include an intermediate slide segment interposed between the inner slide segment and the outer slide segment. The outer slide segment is constructed from a bent piece of material having a substantially uniform wall thickness. The outer slide segment is formed to have a wall portion, an upper portion and a lower portion. Each of the upper portion and lower portion include two layers of the piece of material. A mounting assembly for a slide assembly includes at least one bracket having a first pin and a second pin movable relative to the first pin. The second pin can surround and slide upon the first pin and can be biased to a first position and movable to a second position relative to the first pin.

The sliding rail assembly includes an outer rail having a positioning feature, an intermediate rail displaceable relative to the outer rail and having a concave surface facing the positioning feature, a first stopper pivotally connected to the concave surface to correspond to a first side portion of the positioning feature; and an operating device movably connected to the outer rail with a push rod thereof placed in the concave surface and located on one side of the first stopper, so that when the push rod pushes the first stopper along the concave surface, the first stopper is prohibited from blocking the first side portion of the positioning feature.

A synchronous mechanism of a slide rail includes a first hooked bracket, a second hooked bracket, an inner hook set and an outer hook set. The first hooked bracket and the second hooked bracket are installed on a middle rail, and the inner hook set is installed on an inner rail, and the outer hook set is installed on an outer rail. When the slide rail is pulled out or pushed in, the inner, middle, and outer rails are interacted, so that the inner rail, the middle rail and the outer rail can be moved synchronously when they are pushed in or pulled out, so as to improve the smoothness and stability of the operation and the practicality and service life of the product.

A three-section slide rail device includes an outer section, a middle section and an inner section. The outer section includes an outer rail having an extension block formed on a sliding surface. The middle section includes an anti-retraction locking member pivotably connected with a middle rail. The inner section includes an inner rail having an abutment plate formed on an inner surface. The abutment plate abuts against and urges upwardly the anti-retraction locking member to keep the anti-retraction locking member. When the inner section is moved relative to the middle section to disengage the abutment plate from the anti-retraction locking member, the anti-retraction locking member is permitted to turn downwardly to allow the middle section to move to a short extended state, where the anti-retraction locking member abuts against the extension block to prevent a further extending movement of the middle section.

A sliding rail is adapted to be engaged with an engaging member, and includes a track and a limiting mechanism. The track includes a base wall, two side walls, and two pivoting slots. The limiting mechanism includes first and second operating members, a limiting member, and first and second connecting members. The first operating member is operable for driving the limiting member from a locked position, where the engaging member is contained in a limiting space between the limiting member and one of the side walls, to a first unlocked position, where the limiting member is rotated about the second connecting member to open the limiting space. The second operating member is operable for driving the limiting member from the locked position to a second unlocked position, where the limiting member is rotated about the first connecting member to open the limiting space.