CN115479079A

CN115479079A - Sliding rail assembly

Info

Publication number: CN115479079A
Application number: CN202110664114.6A
Authority: CN
Inventors: 陈庚金; 杨顺和; 张维成; 王俊强
Original assignee: King Slide Works Co Ltd; King Slide Technology Co Ltd
Current assignee: King Slide Works Co Ltd; King Slide Technology Co Ltd
Priority date: 2021-06-16
Filing date: 2021-06-16
Publication date: 2022-12-16

Abstract

The invention relates to a slide rail assembly, which comprises a first rail, a second rail, a third rail, a first supporting device and at least one supporting piece. The first rail is provided with a first end part and a second end part which are opposite; the second rail is longitudinally displaceable relative to the first rail; the third rail is longitudinally displaceable relative to the second rail; the first support device exceeds the first end of the first rail by a preset longitudinal distance; at least one supporting member is arranged on one of the second rail and the first supporting device.

Description

Sliding rail assembly

Technical Field

The present invention relates to a slide rail, and more particularly, to a slide rail assembly capable of improving the supporting performance of the slide rail during relative displacement.

Background

For example, U.S. Pat. No. 8,147,011 B2 discloses a slide rail assembly including a first rail member, a second rail member and a third rail member. The second rail member is movably mounted between the first rail member and the second rail member. Wherein the second rail member comprises a first rail section and a second rail section which are connected back to back. The second rail section is provided with a plurality of first rollers and second rollers; when the third rail member is pulled out relative to the second rail member, the first roller and the second roller are used for assisting and supporting the third rail member. Alternatively, when the third rail member is pulled out to a predetermined stroke relative to the second rail member, the supporting wheel connected to the front support of the first rail member can also be used to support the third rail member. The main disclosure is to provide the third rail to be easily guided to be reassembled with the second rail and to assist the third rail to slide when the third rail is to be reassembled again after being pulled out and separated from the second rail by the pair of supporting wheels of the front bracket.

For example, U.S. Pat. No. 10,159,343 B2 discloses a slide rail assembly including a first rail, a second rail, a third rail, a first bracket and a second bracket. The third rail is movably mounted between the first rail and the second rail. The first bracket and the second bracket can move relative to the first rail. The first bracket and the first rail can move relative to each other through the at least one rolling piece. The first bracket and the first rail can be displaced relative to each other by the first rolling member or the second rolling member, so as to facilitate the first bracket and the first rail to move relative to each other, thereby increasing the extension distance of the slide rail assembly relative to the frame.

For example, japanese patent publication No. JP 5514379 B2 discloses a slide rail assembly comprising a movable rail, a fixed rail and a pressure contact member. The movable rail and the fixed rail can move relative to each other, and the movable rail and the fixed rail can be contacted and displaced relative to each other through the pressure contact piece. The pressure contact member is a roller. This document mainly discloses that when the movable rail is displaced to a position close to the retracted position relative to the fixed rail, the movable rail can be closed by itself relative to the fixed rail by means of the pressure contact member of the roller.

Although the above three patents have disclosed the related technical features of the roller (rolling element) applied to the sliding track, how to develop a different sliding track product becomes an important issue with the market demand.

Disclosure of Invention

One objective of the present invention is to provide a slide rail assembly capable of improving the supporting performance of the slide rail during relative displacement.

Another object of the present invention is to provide a slide rail assembly capable of reducing resistance when the slide rail is relatively displaced.

According to an aspect of the present invention, a sliding rail assembly includes a first rail, a second rail, a third rail, a first supporting device and at least one supporting member. The first rail is provided with a first end part and a second end part which are opposite; the second rail is longitudinally displaceable relative to the first rail; the third rail is longitudinally displaceable relative to the second rail; the first support means extends a predetermined longitudinal distance beyond the first end of the first rail; at least one supporting member is arranged on one of the second rail and the first supporting device.

According to another aspect of the present invention, a sliding rail assembly includes a first rail, a second rail, a third rail, a first supporting device and at least one supporting member. The second rail is longitudinally displaceable relative to the first rail; the third rail is longitudinally displaceable relative to the second rail; the first support means extends a predetermined longitudinal distance beyond the first end of the first rail; at least one support member is arranged on the second rail; wherein the first rail, the second rail and the third rail are provided with a first end part and a second end part which are opposite; when the second rail is longitudinally displaced to an extending position from a folding position to an opening direction relative to the first rail, the at least one supporting piece is in contact support along the first supporting device; wherein one of the at least one support member and the first support device comprises an arc-shaped profile, and the other of the at least one support member and the first support device comprises a linear section for supporting the arc-shaped profile in a mutual contact manner; when the second rail is in the extending position relative to the first rail, the first end part of the second rail exceeds the first end part of the first rail; when the second rail is at the extending position relative to the first rail, the third rail can move to an opening position relative to the second rail; when the third rail is in the open position relative to the second rail, the first end of the third rail exceeds the first end of the second rail.

According to another aspect of the present invention, a slide assembly for mounting a carrier to a rack, the rack including a first post and a second post, the carrier including a first predetermined portion and a second predetermined portion, the first predetermined portion having a first width, the second predetermined portion having a second width smaller than the first width, the slide assembly including a first rail, a second rail, a third rail, a first supporting device, a second supporting device and at least one supporting member. The first rail is provided with a first end part and a second end part which are opposite; the second rail is longitudinally displaceable relative to the first rail; the third rail can be longitudinally displaced relative to the second rail and is used for being installed to a second predetermined part of the bearing object; the first support means extending a predetermined longitudinal distance beyond the first end of the first rail, the first support means being adapted to provide mounting of the first rail to the first post; the second supporting device can move relative to the first supporting device and is used for mounting the first rail to the second column; at least one supporting member is arranged on one of the second rail and the first supporting device.

Drawings

For further explanation of the above objects, structural features and effects of the present invention, the present invention will be described in detail with reference to the accompanying drawings, in which:

fig. 1 is an exploded view of a slide rail assembly according to a first embodiment of the invention.

Fig. 2 is a schematic view illustrating a slide rail assembly in a retracted state according to a first embodiment of the present invention.

Fig. 3 is a schematic view illustrating the slide rail assembly in an extended state according to the first embodiment of the present invention.

Fig. 4 is an exploded view of a first embodiment of a carrier mountable to a rack via a rail assembly.

Fig. 5 is a schematic view of the carrier of the first embodiment of the present invention being mounted to the rack by a pair of slide assemblies.

Fig. 6 is a partial schematic view illustrating that the carrier can be positioned in the rack by the slide rail assembly in the retracted state according to the first embodiment of the present invention.

Fig. 7 is a partial schematic view of the carrier according to the first embodiment of the invention, which can be positioned outside the rack by the slide rail assembly in the extended state.

Fig. 8 is a schematic view of the carrier of the first embodiment of the present invention being mounted to the rack by the pair of slide rail assemblies.

Fig. 9 is a schematic view illustrating the slide rail assembly mounted on the rack and in the retracted state according to the second embodiment of the present invention.

Fig. 10 is a schematic view of the slide rail assembly of the second embodiment of the present invention installed on the rack and in the extended state.

Fig. 11 is a schematic view illustrating the slide rail assembly of the third embodiment of the invention installed on the rack and in the retracted state.

Fig. 12 is a schematic view of the slide assembly of the third embodiment of the present invention installed on the frame and in the extended state.

Fig. 13 is a schematic view of the carrier of the third embodiment of the present invention being mounted to the rack by the slide rail assembly.

Fig. 14 is a schematic view illustrating the slide rail assembly of the fourth embodiment of the invention installed in the rack and in the retracted state.

Fig. 15 is a schematic view of the slide assembly of the fourth embodiment of the present invention installed on the frame and in the extended state.

Fig. 16 is a partial view of the slide rail assembly mounted on the frame and in the extended state according to the fourth embodiment of the present invention.

Fig. 17 is a partial schematic view of the slide rail assembly mounted on the frame in the extended state according to the fourth embodiment of the invention.

Detailed Description

As shown in fig. 1 and 2, a slide assembly 20 according to a first embodiment of the present invention includes a first rail 22, a second rail 24, a third rail 26, a first supporting device 28 and at least one supporting member 30, wherein the second rail 24 is movably installed between the first rail 22 and the third rail 26, and preferably, the slide assembly 20 further includes a second supporting device 32. The first rail 22 (e.g., outer rail), the second rail 24 (e.g., middle rail), and the third rail 26 (e.g., inner rail) are longitudinally displaceable relative to one another. It should be noted that in this embodiment, the X-axis direction is a longitudinal direction (or a length direction or a displacement direction of the slide rail), the Y-axis direction is a transverse direction (or a lateral direction of the slide rail), and the Z-axis direction is a vertical direction (or a height direction of the slide rail).

The first rail 22 has a first end 22a and a second end 22b opposite to each other, such as a front end and a rear end, but not limited to the embodiment. The first rail 22 includes a first wall 34a, a second wall 34b and a longitudinal wall 36 connected between the first wall 34a and the second wall 34b of the first rail 22. The first wall 34a, the second wall 34b and the longitudinal wall 36 of the first rail 22 together define a first channel 38.

The second rail 24 is movably mounted to the first channel 38 of the first rail 22. The second rail 24 has a first end 24a and a second end 24b opposite to each other, such as a front end and a rear end, but not limited to the embodiment. The second rail 24 includes a first wall 40a, a second wall 40b and a longitudinal wall 42 connected between the first wall 40a and the second wall 40b of the second rail 24. The first wall 40a, the second wall 40b and the longitudinal wall 42 of the second rail 24 together define a second channel 44.

The third rail 26 is movably mounted to the second channel 44 of the second rail 24. The third rail 26 has a first end 26a and a second end 26b opposite to each other, such as a front end and a rear end, but not limited to the embodiment. The third rail 26 includes a first wall 46a, a second wall 46b and a longitudinal wall 48 connected between the first wall 46a and the second wall 46b of the third rail 26.

Preferably, the slide assembly 20 further comprises at least a first sliding assisting device 50 movably installed between the first rail 22 and the second rail 24, and the at least a first sliding assisting device 50 comprises a plurality of first balls 52 for improving smoothness when the second rail 24 and the first rail 22 are displaced relative to each other.

Preferably, the slide assembly 20 further includes a second sliding aid 54 movably mounted between the second rail 24 and the third rail 26, the second sliding aid 54 includes a plurality of second balls 56 for improving smoothness when the third rail 26 and the second rail 24 are displaced relative to each other.

The first support means 28 is beyond the first end 22a of the first rail 22 by a predetermined longitudinal distance X.

Preferably, the first supporting device 28 comprises a reinforcing member 58 and a first bracket 60, the reinforcing member 58 is located at a back side of the first rail 22, and the reinforcing member 58 is substantially longitudinally oriented, for example, a portion of the reinforcing member 58 is connected to the back side of the first rail 22 (the back side is, for example, the side opposite to the first channel 38), and the other portion of the reinforcing member 58 is beyond the first end 22a of the first rail 22 by the predetermined longitudinal distance X, since a portion of the reinforcing member 58 is connected (for example, fixed, but not limited) to the first rail 22, thereby improving the local structural strength of the first rail 22; on the other hand, the reinforcing member 58 has a first end 58a and a second end 58b opposite to each other, such as a front end and a rear end, but the embodiment is not limited thereto. The first bracket 60 is connected (e.g., fixed, but not limited) to the reinforcement member 58, and the first bracket 60 is located adjacent to the first end portion 58a of the reinforcement member 58. The first support assembly 28 further includes at least one first mounting member 62 disposed on the first bracket 60.

Preferably, the reinforcing member 58 includes a first portion 64a, a second portion 64b and a longitudinal portion 66 connected between the first portion 64a and the second portion 64b, the first portion 64a, the second portion 64b and the longitudinal portion 66 of the reinforcing member 58 together define a reinforcing channel 68 (see fig. 5), and the reinforcing channel 68 is located between the first end portion 58a and the second end portion 58 b.

Preferably, the second support device 32 is movable relative to the first support device 28. Further, the second supporting device 32 includes a second bracket 71, an extension bracket 70 (see fig. 5), and at least one second mounting element 72, wherein the extension bracket 70 is movably mounted to the reinforcing channel 68 of the reinforcing element 58, and the second supporting device 32 is adjustable relative to the first supporting device 28 by the extension bracket 70. On the other hand, the at least one second mounting member 72 is provided to the second bracket 71.

Preferably, the first supporting device 28 further includes a supporting portion 74, for example, the supporting portion 74 is disposed on the first bracket 60, and the supporting portion 74 extends transversely (or laterally) relative to the reinforcing member 58.

The at least one support 30 is disposed on the second rail 24.

Preferably, the track assembly 20 further comprises an auxiliary member 76 connected to the second track 24, and the at least one support member 30 is rotatably mounted on the auxiliary member 76, for example, the at least one support member 30 is mounted on the auxiliary member 76 through a shaft 78.

Preferably, the auxiliary member 76 is connected (e.g., fixedly connected) to the second rail 24, and the auxiliary member 76 is located adjacent to the first end 24a of the second rail 24.

Preferably, when the second rail 24 is folded relative to the first rail 22 (as shown in fig. 2), the first end 24a of the second rail 24 is beyond the first end 22a of the first rail 22, which facilitates the connection of the auxiliary element 76 to the second rail 24.

Preferably, the position of the at least one supporting member 30 corresponds to one of the first portion 64a and the second portion 64b of the reinforcing member 58, and at least one of the first portion 64a and the second portion 64b of the at least one supporting member 30 and the reinforcing member 58 includes an arc-shaped contour. Here, the at least one supporting member 30 is a rolling member or a smooth member including the arc-shaped contour, and may be implemented as a spherical or cylindrical object such as a roller or a ball, but is not limited thereto; and the position of the at least one supporting member 30 corresponds to one of the first portion 64a and the second portion 64b of the reinforcing member 58, and here, it is taken as an example that the supporting member corresponds to the first portion 64a of the reinforcing member 58. The first portion 64a of the stiffener 58 includes a linear section arranged substantially longitudinally for supporting in contact with the arcuate profile.

Preferably, the at least one support member 30 comprises a plastic material.

Preferably, the auxiliary element 76 has a space 80 (e.g., an opening or a notch), and the at least one supporting element 30 corresponds to the first portion 64a of the reinforcing element 58 through the space 80.

As shown in fig. 2 and 3, the slide rail assembly 20 can be in a retracted state (as shown in fig. 2, the second rail 24 and the third rail 26 are both retracted relative to the first rail 22). Further, the second rail 24 can be longitudinally displaced from a retracted position R (shown in fig. 2) to an opening direction D1 to an extended position E (shown in fig. 3) relative to the first rail 22, and the third rail 26 can be longitudinally displaced from the second rail 24 at the extended position E to an opening position K in the opening direction D1, so that the slide rail assembly 20 is in an extended state. Wherein, when the second rail 24 is in the extended position E relative to the first rail 22, the first end 24a of the second rail 24 exceeds the first end 22a of the first rail 22; when the third rail 26 is in the open position K relative to the second rail 24, the first end 26a of the third rail 26 extends beyond the first end 24a of the second rail 24 (as shown in fig. 3).

Preferably, when the slide rail assembly 20 is in the retracted state, the first end 26a of the third rail 26 is located between the at least one first mounting element 62 and the at least one second mounting element 72.

Preferably, when the slide rail assembly 20 is in the extended state (as shown in fig. 3), the first end 26a of the third rail 26 extends beyond the at least one first mounting member 62 by a predetermined distance.

It should be noted that, since the first supporting device 28 exceeds the first end portion 22a of the first rail 22 by the predetermined longitudinal distance X, the at least one supporting member 30 can be supported in a mutual supporting relationship along the first portion 64a of the reinforcing member 58 during the process of longitudinally displacing the second rail 24 relative to the first rail 22 from the retracted position R to the opening direction D1 to the extended position E; alternatively, the at least one supporting member 30 can be supported along the first portion 64a of the reinforcing member 58 in a contacting manner during the longitudinal displacement of the second rail 24 relative to the first rail 22 from the extended position E to the retracted position R in the retracting direction D2. Wherein, the at least one supporting member 30 and the first portion 64a of the reinforcing member 58 are supported by the arc-shaped contour and the linear section contacting each other, which helps to reduce the frictional resistance.

For example, the at least one supporting member 30 can roll along the first portion 64a of the reinforcing member 58 to improve or reduce the friction force when the second rail 24 is displaced relative to the first rail 22, which helps to ensure the smoothness of the displacement of the second rail 24 relative to the first rail 22 between the retracted position R and the extended position E, and enables the second rail 24 (or the third rail 26) to obtain an additional supporting effect relative to the first rail 22. For the user, the pulling force or pushing force applied to the slide rail can be effectively reduced, that is, the user can easily or effortlessly complete the opening or closing of the slide rail assembly 20.

As shown in fig. 4 and 5, a carrier 82 can be mounted to a rack via a pair of rail assemblies 20, the carrier 82 (e.g., an electronic device or a device housing) includes a first predetermined portion 82a and a second predetermined portion 82b, the first predetermined portion 82a has a first width W1, and the second predetermined portion 82b has a second width W2 smaller than the first width W1. The frame includes a pair of first posts 84a and a pair of second posts 84b, and the first rail 22 of each slide rail assembly 20 can be mounted to the first posts 84a via the first support device 28, and the first rail 22 can be mounted to the second posts 84b via the second support device 32.

Preferably, the first rail 22 of each slide rail assembly 20 is mountable to the first post 84a and the second post 84b via the at least one first mounting member 62 and the at least one second mounting member 72.

It should be noted that, since the carrier 82 has a special shape (e.g., a shape with a wide front and a narrow back), the third rail 26 of each slide rail assembly 20 can be only partially installed to the side 86 of the second predetermined portion 82b of the carrier 82, and when each slide rail assembly 20 is in the retracted state, the first ends 22a, 24a, 26a of the first rail 22, the second rail 24 and the third rail 26 substantially correspond to the middle position of the carrier 82. It should be noted that, since the second rail 24 of this embodiment can be supported by the at least one supporting member 30 along the (first portion 64a of the) reinforcing member 58 in a contact manner, particularly, when the sliding track assembly 20 is in the retracted position, the at least one supporting member 30 is located at a position substantially in the middle of two sides of the supporting object 82. Therefore, the supporting ability of the third rail 26 and the second rail 24 for the specially shaped carrier 82 is improved.

As shown in fig. 6 and 7, a user can apply a pulling force to the carrier 82 in the opening direction D1 to move the slide assembly 20 from the retracted state (shown in fig. 6) to the extended state (shown in fig. 7), so that the carrier 82 can be moved from inside the rack to outside the rack. Alternatively, a user can apply a pushing force to the carrier 82 in the retracting direction D2 to move the slide assembly 20 from the extended state (as shown in fig. 7) to the retracted state (as shown in fig. 6), so as to displace the carrier 82 from outside the rack into the rack.

It should be noted that when the slide rail assembly 20 is in the extended state, the first end portion 26a of the third rail 26 exceeds the at least one first mounting element 62 and the first column 84a by the predetermined distance (as shown in fig. 7), and the other portion (including the first predetermined portion 82 a) of the carrier 82 which is not supported by the third rail 26 has a heavy weight enough to affect the supporting force of the third rail 26 and the second rail 24, however, since the second rail 24 of this embodiment can be supported by the at least one supporting element 30 along the (first portion 64a of the reinforcing element 58), it is helpful to improve the supporting ability of the third rail 26 and the second rail 24 to maintain a certain degree of the supporting ability for the carrier 82 with a special shape.

In addition, the at least one supporting member 30 and (the first portion 64a of) the reinforcing member 58 are supported by the arc-shaped contour and the linear section in contact, so as to improve or reduce the friction force when the second rail 24 is displaced relative to the first rail 22, thereby achieving the effect of saving labor. For example, when the user applies the pulling force to the supporting object 82, the second rail 24 (and the third rail 26) is pulled out from the retracted position R relative to the first rail 22 in the opening direction D1, so as to reduce the pulling force of the second rail 24 relative to the first rail 22; alternatively, when the user applies the pushing force to the support 82 to push the second rail 24 (and the third rail 26) from the extended position E (the open position K) to the retracted direction D2 relative to the first rail 22, the pushing force of the second rail 24 relative to the first rail 22 can be reduced. This allows the user to easily or effortlessly open or close the slide assembly 20 even if the third rail 26 is only partially mounted to the second predetermined portion 82b (side 86) of the carrier 82.

As shown in fig. 8, two opposite side edges 86 of the second predetermined portion 82b of the carrier 82 are mounted on the third rail 26 of each slide rail assembly 20. When the slide rail assembly 20 is in the retracted state and/or the extended state, the bottom surface 88 of the supporting object 82 can also be supported by the supporting portion 74. Accordingly, the supporting object 82 can be effectively supported during the process of moving from the inside of the rack to the outside of the rack or from the outside of the rack to the inside of the rack, so as to ensure the smoothness of the relative movement between the slide rails of the slide rail assembly 20. It is also helpful for the user to easily or laborsavingly complete the opening or closing of the slide assembly 20.

Referring to fig. 9 and 10, a slide rail assembly 200 according to a second embodiment of the invention is shown. The slide rail assembly 200 of the second embodiment differs from the slide rail assembly 20 of the first embodiment substantially in that: the first bracket 202 of the slide rail assembly 200 includes an extension portion 204, the at least one support member 206 is disposed on the auxiliary member 208, and the at least one support member 206 corresponds to the extension portion 204 of the first bracket 202, and the extension portion 204 of the first bracket 202 includes a linear section substantially disposed longitudinally for contacting and supporting with the arc-shaped contour of the at least one support member 206.

Further, when the second rail 210 is longitudinally displaced from the retracted position R to the extended position E in the opening direction D1 relative to the first rail 212, the at least one supporting member 206 is supported along the extending portion 204 of the first bracket 202 in a contacting manner; alternatively, the at least one supporting element 206 is supported along the extending portion 204 of the first bracket 202 in a contacting manner when the second rail 210 is displaced from the extended position E to the retracted position R in the retracting direction D2 relative to the first rail 212. According to this configuration, substantially the same technical effects as those of the first embodiment can be achieved, for example, by using the at least one supporting member 206 and the extending portion 204 of the first bracket 202 to be supported in contact with each other by the arc-shaped contour and the linear section, so as to improve or reduce the friction force when the second rail 210 is displaced relative to the first rail 212, which can generate a labor-saving effect for the user. Further, when the user applies the pulling force to the object (not shown) carried by the third rail 214, the second rail 210 (and the third rail 214) is pulled out from the retracted position R in the opening direction D1 relative to the first rail 212, so as to reduce the pulling force of the second rail 210 relative to the first rail 212; alternatively, when the user applies the pushing force to the load-bearing object to push the second rail 210 (and the third rail 214) from the extended position E (the opening position K) to the retracted direction D2 relative to the first rail 212, the pushing force of the second rail 210 relative to the first rail 212 can be reduced. For the user, the opening or closing of the slide rail assembly 200 can be easily or effortlessly completed.

Referring to fig. 11, 12 and 13, a slide rail assembly 300 according to a third embodiment of the invention is shown. The slide rail assembly 300 of the third embodiment differs from the slide rail assemblies 20 of the first and second embodiments substantially in that: the at least one support 302 is disposed on the first bracket 306 of the first support apparatus 304; when the slide rail assembly 300 is in an extended state (as shown in fig. 12 or 13), the at least one supporting member 302 is located at a bottom of one of the second rail 308 and the third rail 310, and the at least one supporting member 302 is used for supporting the bottom surface 312 (as shown in fig. 13) of the carrier 82. Since the at least one supporting member 302 and the bottom surface 312 of the carrier 82 are supported by contacting an arc-shaped contour and a linear segment, the frictional resistance can be reduced, and the at least one supporting member 302 can be used to support the carrier 82, which can be easily or laborsavingly opened or closed by a user even if the third rail 310 is only partially installed to the side 86 of the second predetermined portion 82b of the carrier 82.

Referring to fig. 14, 15, 16 and 17, a slide rail assembly 400 according to a fourth embodiment of the invention is shown. The slide rail assembly 400 of the fourth embodiment is different from the slide rail assembly 20 of the first embodiment in that: at least one further support 404 is provided on the auxiliary element 403 of the second rail 402, said at least one further support 404 being adapted to cooperate with a third rail 406. Preferably, the auxiliary device 402 further has a working member 408.

Further, when the second rail 402 is displaced from the retracted position R (as shown in fig. 14) to the opening direction D1 to the extended position E (as shown in fig. 15) relative to the first rail 401, the second rail can be supported by the supporting member 410 along the first portion 415a of the reinforcing member 414 of the first supporting device 412. And when the third rail 406 is displaced to the opening position K in the opening direction D1 relative to the second rail 402 at the extended position E, the second wall 417b (as shown in fig. 15 or 16) of the third rail 406 can be supported by the other supporting member 404. In the opposite direction, when the second rail 402 is displaced relative to the first rail 401 from the extended position E (as shown in fig. 15) to the retracted position D2, the first portion 415a of the reinforcing member 414 of the first supporting device 412 can be contacted by the supporting member 410. And when the third rail 406 is displaced from the open position K (as shown in fig. 15) to the retracted direction D2 relative to the second rail 402 at the extended position E, the other support member 404 provides a contact support for the second wall 417b of the third rail 406. Preferably, the other support 404 and the support 410 are substantially a rolling member or an optical sliding member, and may be implemented as a ball or a cylinder, such as a roller or a ball, but not limited thereto.

According to this configuration, the friction force when the second rail 402 is displaced relative to the first rail 401 can be improved or reduced by the supporting member 410; on the other hand, the friction force when the third rail 406 is displaced relative to the second rail 402 can be improved or reduced by the other support 404.

Preferably, the auxiliary element 403 has a connecting portion having a first connecting section 407a and a second connecting section 407b, the supporting element 410 is mounted to the adjacent first connecting section 407a through the shaft 405, and the working element 408 is mounted to the adjacent second connecting section 407b (as shown in fig. 16 and 17).

Preferably, the working member 408 is an elastic member, and the working member 408 has a buckle portion 416 and a guide portion 418 connected to the buckle portion 416 (as shown in fig. 17), the guide portion 418 includes an inclined surface or an arc surface, and a locking space 420 is formed between the buckle portion 416 and the second connecting section 407b of the auxiliary member 403. When the second rail 402 is located at the extended position E relative to the first rail 401, the fastening portion 416 of the operating member 408 can fasten a side portion 424 of the first bracket 422 through the fastening space 420 to limit the lateral movement of the second rail 402 at the extended position E, such as preventing the second rail 402 from shaking left and right (as shown in fig. 16 and 17) due to external force.

Preferably, the support member 410 and the other support member 404 are adjacent to the first wall 426a and the second wall 426b of the second rail 402, respectively, and near the first end 402a of the second rail 402 (as shown in fig. 14).

Although the present invention has been described with reference to the present specific embodiments, it will be recognized by those skilled in the art that the above embodiments are merely illustrative of the present invention and that various equivalent changes and modifications may be made without departing from the spirit of the invention and, therefore, it is intended that all changes and modifications to the above embodiments be included within the scope of the appended claims.

Claims

1. A slide rail assembly comprises a first rail, a second rail, a third rail, a first supporting device and at least one supporting piece, and is characterized in that:

the first rail is provided with a first end part and a second end part which are opposite;

the second rail being longitudinally displaceable relative to the first rail;

said third rail being longitudinally displaceable relative to the second rail;

the first support means extends beyond the first end of the first rail by a predetermined longitudinal distance; and

the at least one supporting member is arranged on one of the second rail and the first supporting device.

2. The slide rail assembly of claim 1 wherein the first support means comprises a stiffener and a first bracket, the stiffener being located on a backside of the first rail and the stiffener exceeding the predetermined longitudinal distance of the first end of the first rail; the first bracket is connected with the reinforcing piece.

3. The slide rail assembly of claim 2 wherein the reinforcement member comprises a first portion, a second portion and a longitudinal portion connected between the first portion and the second portion; the at least one support member is arranged on the second rail; when the second rail is longitudinally displaced to an extending position from a folding position to an opening direction relative to the first rail, the at least one supporting piece is in contact support along one of the first part and the second part of the reinforcing piece; when the second rail moves from the extending position to a folding direction to the folding position relative to the first rail, the at least one supporting piece is in contact support along one of the first portion and the second portion of the reinforcing piece.

4. The slide rail assembly of claim 3 wherein at least one of the first portion and the second portion of the at least one support member and the reinforcing member comprises an arcuate profile.

5. The slide rail assembly of claim 3 further comprising an auxiliary member coupled to the second rail, the at least one support member being rotatably mounted to the auxiliary member, the second rail having a first end and a second end opposite each other, and the auxiliary member being coupled to the first end of the adjacent second rail.

6. The slide rail assembly of claim 2 wherein the first bracket includes an extension that extends substantially longitudinally; the at least one support member is arranged on the second rail; when the second rail is longitudinally displaced to an extending position from a folding position to an opening direction relative to the first rail, the at least one supporting piece is in contact support along the extending part of the first bracket; when the second rail moves to the folding position from the extending position to the folding direction relative to the first rail, the at least one supporting piece is in contact support along the extending part of the first bracket.

7. The slide rail assembly of claim 6 wherein at least one of the at least one support member and the extension portion of the first bracket includes an arcuate profile.

8. The slide rail assembly of claim 6 further comprising an auxiliary member coupled to the second rail, the at least one support member being rotatably mounted to the auxiliary member, the second rail having a first end and a second end opposite each other, and the auxiliary member being coupled to the first end of the adjacent second rail.

9. The slide rail assembly of claim 3 further comprising at least one other support member disposed on the second rail, wherein the at least one other support member provides contact support for the third rail when the third rail is moved in the opening direction to an open position relative to the second rail in the extended position; when the third rail is displaced from the opening position to the folding direction relative to the second rail at the extending position, the third rail can be supported by the at least one other supporting member in a contact manner.

10. The slide rail assembly of claim 2 wherein the at least one support member is disposed on the first bracket of the first support device; when the slide rail assembly is in an extended state, the at least one support member is positioned at the bottom of one of the second rail and the third rail, and the at least one support member is rotatably mounted on the first bracket.

11. The slide rail assembly of claim 2 further comprising a second support device movable relative to the first support device, the first support device and the second support device comprising at least one first mounting member and at least one second mounting member, respectively, the at least one first mounting member and the at least one second mounting member configured to provide mounting of the first rail to a first post and a second post of a frame.

12. The slide rail assembly of claim 5 wherein the auxiliary member further comprises a working member having a locking portion and a guiding portion connecting the locking portion, the guiding portion comprises an inclined surface or an arc surface, a locking space is provided between the locking portion and the auxiliary member, and the locking portion of the working member can lock a side portion of the first bracket through the locking space when the second rail is in an extended position relative to the first rail.

13. A slide rail assembly comprises a first rail, a second rail, a third rail, a first supporting device and at least one supporting piece, and is characterized in that:

the second rail being longitudinally displaceable relative to the first rail;

said third rail being longitudinally displaceable relative to the second rail;

the at least one support member is arranged on the second rail;

wherein the first rail, the second rail and the third rail are provided with a first end part and a second end part which are opposite;

when the second rail is longitudinally displaced to an extending position from a folding position to an opening direction relative to the first rail, the at least one supporting piece is in contact support along the first supporting device;

wherein one of the at least one support member and the first support device comprises an arc-shaped profile, and the other of the at least one support member and the first support device comprises a linear segment for contacting and supporting with the arc-shaped profile;

when the second rail is in the extending position relative to the first rail, the first end part of the second rail exceeds the first end part of the first rail;

when the second rail is at the extending position relative to the first rail, the third rail can move to an opening position relative to the second rail;

when the third rail is in the open position relative to the second rail, the first end of the third rail exceeds the first end of the second rail.

14. The slide rail assembly of claim 13 wherein the first support means comprises a stiffening member and a first bracket, the stiffening member being connected to the first rail and the stiffening member extending beyond the first end of the first rail by the predetermined longitudinal distance; the first bracket is connected with the reinforcing piece.

15. The slide rail assembly of claim 14 wherein the at least one support member is supported along the reinforcement member in contact with one of the first brackets during longitudinal displacement of the second rail relative to the first rail from the retracted position to the extended position in the opening direction; when the second rail moves from the extended position to the retracted position relative to the first rail in a retracting direction, the at least one supporting member is supported along the reinforcing member in contact with one of the first brackets, and the at least one supporting member is a rolling member or an optical sliding member.

16. The slide rail assembly of claim 15 wherein the at least one support member comprises a plastic material.

17. A kind of slide rail assembly, is suitable for installing a bearing object to a stander, this stander includes a first post and a second post, this bearing object includes a first prespecified portion and a second prespecified portion, this first prespecified portion has a first width, and this second prespecified portion has a second width smaller than this first width, this slide rail assembly includes a first rail, a second rail, a third rail, a first strutting arrangement, a second strutting arrangement and at least a strutting piece, characterized by that:

the second rail being longitudinally displaceable relative to the first rail;

the third rail can be longitudinally displaced relative to the second rail and is used for being installed to a second preset part of the bearing object;

said first support means extending a predetermined longitudinal distance beyond the first end of the first rail, the first support means being adapted to provide mounting of the first rail to the first post;

the second supporting device can move relative to the first supporting device and is used for mounting the first rail to the second column; and

18. The slide rail assembly of claim 17 wherein the first support device comprises a stiffener, a first bracket, and at least a first mounting member, the stiffener being attached to a back side of the first rail and the stiffener extending beyond the first end of the first rail by the predetermined longitudinal distance; the first bracket is connected with the reinforcing piece and is installed to the first column through the at least one first installation piece; the reinforcing part comprises a first part, a second part and a longitudinal part which are connected between the first part and the second part; the at least one support member is arranged on the second rail; when the second rail is longitudinally displaced from a folding position to an opening position relative to the first rail, the at least one supporting piece is in contact support along one of the first part and the second part of the reinforcing piece; when the second rail moves from the extending position to a folding direction to the folding position relative to the first rail, the at least one supporting piece is in contact support along one of the first portion and the second portion of the reinforcing piece.

19. The slide rail assembly of claim 17 wherein the first support means comprises a reinforcement member, a first bracket and at least a first mounting member, the reinforcement member being attached to a back side of the first rail and the reinforcement member extending beyond the first end of the first rail by the predetermined longitudinal distance; the first bracket is connected with the reinforcing piece and is installed to the first column through the at least one first installation piece; the first bracket comprises an extension part, and the extension part is in a longitudinal direction; the at least one support member is arranged on the second rail; when the second rail is longitudinally displaced to an extending position from a folding position to an opening direction relative to the first rail, the at least one supporting piece is in contact support along the extending part of the first bracket; when the second rail moves to the folding position from the extending position to the folding direction relative to the first rail, the at least one supporting piece is in contact support along the extending part of the first bracket.

20. The slide rail assembly of claim 17 wherein the first support device comprises a stiffener, a first bracket, and at least a first mounting member, the stiffener being attached to a back side of the first rail and the stiffener extending beyond the first end of the first rail by the predetermined longitudinal distance; the first bracket is connected with the reinforcing piece and is installed to the first column through the at least one first installation piece; the at least one supporting piece is arranged on a first bracket of the first supporting device; when the slide rail assembly is in an extended state, the at least one supporting member is used for supporting the bearing object.