CN116241559A

CN116241559A - Sliding rail assembly

Info

Publication number: CN116241559A
Application number: CN202310453410.0A
Authority: CN
Inventors: 陈庚金; 杨顺和; 翁子承; 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: 2020-08-03
Filing date: 2020-08-03
Publication date: 2023-06-09
Also published as: CN114060408B; CN114060408A

Abstract

The invention relates to a sliding rail assembly, which comprises a first rail, a second rail, a third rail and a limiting piece. The third rail is movably mounted between the first rail and the second rail. The second rail and the third rail can be displaced along a first direction from a preset position relative to the first rail; the limiting piece is provided with a first part and a second part; when the second rail and the third rail are at the preset positions relative to the first rail, the first part of the limiting piece is arranged at the end parts of the adjacent first rail, second rail and third rail, and the second part of the limiting piece is used for preventing the first rail, the second rail and the third rail from separating from each other in a second direction. The first direction and the second direction are substantially perpendicular to each other.

Description

Sliding rail assembly

The present application is a divisional application of the application titled "slide rail assembly" with chinese application No. 202010766547.8 and application date 2020, 08 and 03.

Technical Field

The present invention relates to a sliding rail, and more particularly, to a sliding rail assembly with reliability.

Background

Fig. 1 shows a prior art slide assembly 10. The track assembly 10 includes a plurality of tracks. Wherein a second rail 14 is movably mounted within a channel 16 of the first rail 12 and a slide assist device 18 has a plurality of balls for assisting in longitudinal displacement of the second rail 14 relative to the first rail 12. Further, the rail assembly 10 must meet the safety regulations and quality control of some standards to meet the basic demands of the market. For example, the track assembly 10 must typically be subjected to a shock test to verify that the tracks of the track assembly 10 are durable and capable of carrying a particular weight of a load (e.g., a server or drawer, etc.). When the rail assembly 10 receives the vibration test (fig. 1 shows that only a force F is applied to the rail assembly 10), if the rail assembly 10 receives the force F and the rails are separated or bent, the safety and quality of the rail assembly 10 are considered to be problematic. FIG. 1 shows that after the sliding rail assembly 10 receives the force F, a portion of the second rail 14 is laterally (or laterally) separated or bent with respect to the first rail 12, which may cause the second rail 14 to be incorrectly installed in the channel 16 of the first rail 12, and may result in the second rail 14 not being smoothly displaced with respect to the first rail 12.

Therefore, how to develop a reliable sliding rail assembly is a considerable issue.

Disclosure of Invention

The invention aims to provide a sliding rail assembly with reliability, so that the sliding rail assembly has tight stability in a folding position.

According to one aspect of the present invention, a slide assembly includes a first rail, a second rail, a third rail, and a stopper. The first rail comprises a first wall, a second wall and a longitudinal wall which are connected between the first wall and the second wall of the first rail; the second rail comprises a first wall, a second wall and a longitudinal wall which are connected between the first wall and the second wall of the second rail; the third rail is movably arranged between the first rail and the second rail, and the second rail and the third rail can be displaced along a first direction from a folding position relative to the first rail; the limiting piece is provided with a first part and a second part; when the second rail and the third rail are at the folding position relative to the first rail, the first part of the limiting piece is arranged at the front end parts of the adjacent first rail, second rail and third rail, and the second part of the limiting piece is used for preventing the first rail, the second rail and the third rail from separating from each other in a second direction, and the first direction and the second direction are in a substantially vertical direction relation.

Preferably, the first rail is provided with a bracket fixedly connected to the first rail, the bracket has a limiting feature, the limiting feature comprises an upper portion, a lower portion and a middle portion, the upper portion, the lower portion and the middle portion together define a limiting space for the second portion of the limiting member to extend into to form a limiting relationship with the upper portion, the lower portion and the middle portion of the limiting feature.

Preferably, the bracket has an upper support portion, a lower support portion and an intermediate support portion connected between the upper support portion and the lower support portion, wherein the upper support portion is located on a first wall adjacent to the first rail, the lower support portion is located on a second wall adjacent to the first rail, and the intermediate support portion is located on a longitudinal wall adjacent to the first rail.

Preferably, the limiting feature is a notch type.

Preferably, the middle portion of the stop feature is located adjacent the front end of the first rail, and the upper and lower portions of the stop feature are located beyond the front end of the first rail.

Preferably, the limiting member is fixedly disposed on the second rail.

Preferably, the limiting member and the second rail are integrated.

Preferably, the second portion of the stopper extends substantially perpendicularly from the first portion.

Preferably, when the second rail and the third rail are displaced from the retracted position to an extended position relative to the first rail, the limiting member is far away from the front end portions of the first rail and the third rail.

Preferably, the slide rail assembly further comprises at least one sliding assisting device, and the first rail, the second rail and the third rail are supported relative to each other by the at least one sliding assisting device.

According to another aspect of the present invention, a slide assembly includes a first rail, a second rail, a third rail, and a stopper. The third rail is movably arranged between the first rail and the second rail, and the first rail, the second rail and the third rail can longitudinally displace relative to each other; the limiting piece is arranged on the second rail; when the second rail and the third rail are at a preset position relative to the first rail, the limiting piece can buckle the first rail so as to prevent the first rail, the second rail and the third rail from being separated transversely relative to each other.

Preferably, the first rail comprises a first wall, a second wall and a longitudinal wall connected between the first wall and the second wall of the first rail, wherein the first wall, the second wall and the longitudinal wall of the first rail jointly define a channel; the third rail is movably arranged on the channel of the first rail, the third rail comprises a first wall, a second wall and a longitudinal wall which are connected between the first wall and the second wall of the third rail, and the first wall, the second wall and the longitudinal wall of the third rail jointly define a channel; the second rail is movably mounted to the channel of the third rail.

Preferably, the predetermined position is a retracted position.

Preferably, the second rail has a first end and a second end far away from the first end of the second rail, and the limiting member is located adjacent to the first end of the second rail.

Preferably, the limiting member comprises a first portion and a second portion; the first rail is provided with a bracket, the bracket is provided with a limiting feature, the limiting feature comprises an upper part, a lower part and a middle part, and the upper part, the lower part and the middle part jointly define a limiting space; when the second rail and the third rail are at the preset positions relative to the first rail, the second part of the limiting piece extends into the limiting space to form a limiting relation with the upper part, the lower part and the middle part of the limiting feature.

Preferably, the sliding rail assembly further comprises a first supporting seat arranged on a first wall adjacent to the third rail, and a second supporting seat arranged on a second wall adjacent to the third rail; the first supporting seat is provided with a first groove, and the second supporting seat is provided with a second groove; the second rail comprises a first wall, a second wall and a longitudinal wall which are connected between the first wall and the second wall of the second rail; the first wall of the second rail is provided with a first supporting leg extending into the first groove, and the second wall of the second rail is provided with a second supporting leg extending into the second groove so as to prevent the second rail from moving transversely.

According to yet another aspect of the present invention, a slide assembly includes a first rail, a second rail, a third rail, and a stopper. The first rail comprises a first wall, a second wall and a longitudinal wall which are connected between the first wall and the second wall of the first rail; the second rail comprises a first wall, a second wall and a longitudinal wall which are connected between the first wall and the second wall of the second rail; the third rail is movably arranged between the first rail and the second rail, and comprises a first wall, a second wall and a longitudinal wall which are connected between the first wall and the second wall of the third rail; the limiting piece is arranged on the second rail; wherein two of the first rail, the second rail and the third rail are supported relative to each other by at least one sliding-assisting device; when the second rail and the third rail are at a preset position relative to the first rail, a preset distance is reserved between one end of the at least one sliding assisting device and a first end of the first rail, and one part of the limiting piece is adjacent to one side edge of the longitudinal wall of the first rail.

Drawings

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

FIG. 1 is a schematic view of a prior art slide assembly.

Fig. 2 shows a combined schematic view of a first rail, a second rail and a third rail of the sliding rail assembly according to the first embodiment of the invention.

Fig. 3 shows an exploded view of a slide assembly according to a first embodiment of the present invention.

Fig. 4 shows a partial schematic view of a second rail of the sliding rail assembly according to the first embodiment of the invention.

Fig. 5 shows a schematic cross-sectional view of a second rail of the sliding rail assembly according to the first embodiment of the invention.

Fig. 6 is a schematic view showing a sliding rail assembly in a retracted state according to a first embodiment of the present invention.

Fig. 7 is a schematic view showing a sliding rail assembly in an extended state according to a first embodiment of the present invention.

Fig. 8 is a schematic partial perspective view of the sliding rail assembly according to the first embodiment of the present invention in a first view angle of the retracted state.

Fig. 9 is a schematic partial perspective view showing a second view of the sliding rail assembly in the retracted state according to the first embodiment of the present invention.

Fig. 10 shows a sliding rail assembly according to a second embodiment of the invention, which comprises a first rail, a second rail and a third rail.

Fig. 11 shows an exploded view of a slide assembly according to a second embodiment of the present invention.

Fig. 12 is a schematic view of a portion of a second rail of a sliding rail assembly according to a second embodiment of the invention.

Fig. 13 is a schematic cross-sectional view of a second rail of a slide rail assembly according to a second embodiment of the invention.

Fig. 14 is a schematic view showing a sliding rail assembly in a retracted state according to a second embodiment of the present invention.

Fig. 15 is a partial schematic view showing a second rail of the sliding rail assembly in a predetermined position relative to a third rail according to a second embodiment of the present invention.

Fig. 16 is a schematic cross-sectional view showing the second rail of the sliding rail assembly of the second embodiment of the present invention at the predetermined position relative to the third rail.

Fig. 17 shows a partial schematic view of a second rail of a third embodiment of the invention.

Detailed Description

As shown in fig. 2 and 3, a sliding rail assembly 100 according to a first embodiment of the present invention includes a first rail 102, a second rail 104, a third rail 106 and a limiting member 108. The third rail 106 is movably mounted between the first rail 102 and the second rail 104. The first rail 102, the second rail 104, and the third rail 106 are longitudinally displaceable relative to one another. The first rail 102, the third rail 106 and the second rail 104 are, for example, an outer rail, a middle rail and an inner rail, respectively, but are not limited in implementation. It should be noted that, in this embodiment, the X-axis direction is the longitudinal direction (or the length direction or the displacement direction of the sliding rail), the Y-axis direction is the transverse direction (or the lateral direction of the sliding rail), and the Z-axis direction is the vertical direction (or the height direction of the sliding rail).

The first rail 102 includes a first wall 110a, a second wall 110b, and a longitudinal wall 112 connected between the first wall 110a and the second wall 110b of the first rail 102. The first wall 110a, the second wall 110b and the longitudinal wall 112 of the first rail 102 together define a channel. The first rail 102 is provided with a bracket 114, and the bracket 114 is connected (e.g., fixedly connected) to the first rail 102 to be regarded as a part of the first rail 102. In other words, the bracket 114 and the first rail 102 can be considered as a single body. The first rail 102 has a first end 102a and a second end 102b, which are far from the first end 102a, and the first end 102a and the second end 102b are, for example, a front end and a rear end, but not limited thereto. The bracket 114 has an upper support portion 116a, a lower support portion 116b and an intermediate support portion 118 connected between the upper support portion 116a and the lower support portion 116b, wherein the upper support portion 116a is located adjacent to the first wall 110a of the first rail 102, the lower support portion 116b is located adjacent to the second wall 110b of the first rail 102, and the intermediate support portion 118 is located adjacent to the longitudinal wall 112 of the first rail 102.

Preferably, the bracket 114 has a stop feature 120, the stop feature 120 comprising an upper portion 120a, a lower portion 120b, and an intermediate portion 120c. The upper portion 120a, the lower portion 120b and the middle portion 120c together define a space S.

Preferably, the stop feature 120 is a notch type.

Preferably, the middle portion 120c of the stop feature 120 is located adjacent to the first end 102a (e.g., the front end) of the first rail 102, and the upper portion 120a and the lower portion 120b of the stop feature 120 are located beyond the first end 102a (e.g., the front end) of the first rail 102.

The third rail 106 is movably mounted within the channel of the first rail 102. The third rail 106 includes a first wall 122a, a second wall 122b, and a longitudinal wall 124 connected between the first wall 122a and the second wall 122b of the third rail 106. The first wall 122a, the second wall 122b and the longitudinal wall 124 of the third rail 106 together define a channel. The third rail 106 has a first end 106a and a second end 106b, which are far from the first end 106a, and the first end 106a and the second end 106b are, for example, front end and rear end, but not limited thereto.

The second rail 104 is movably mounted within the channel of the third rail 106. The second rail 104 includes a first wall 126a, a second wall 126b, and a longitudinal wall 128 connected between the first wall 126a and the second wall 126b of the second rail 104. The second rail 104 has a first end 104a and a second end 104b, which are far from the first end 104a, and the first end 104a and the second end 104b are, for example, front end and rear end, but not limited thereto.

Preferably, the sliding rail assembly 100 further comprises at least one sliding aid, and the first rail 102, the second rail 104 and the third rail 106 are supported relative to each other by the at least one sliding aid. For example, the sliding rail assembly 20 includes at least one sliding assisting device for assisting the smoothness of the relative displacement of the first rail 102 with respect to the third rail 106, wherein the at least one sliding assisting device is provided with a first bead 134a and a second bead 134b located in the channel of the first rail 102, and the first bead 134a and the second bead 134b each have a plurality of rolling members 136 for supporting the first wall 122a and the second wall 122b of the third rail 106, respectively, but the embodiment is not limited thereto. In another aspect, the sliding rail assembly 20 further includes at least one other sliding assisting device for assisting the smoothness of the relative displacement between the second rail 104 and the third rail 106, wherein the at least one other sliding assisting device is exemplified by a first sliding assisting device 138 and a second sliding assisting device 140 movably installed in the channel of the third rail 106, wherein the first sliding assisting device 138 and the second sliding assisting device 140 can be used for supporting rail sections of different portions of the second rail 104, and the first sliding assisting device 138 and the second sliding assisting device 140 each include a plurality of first balls 142a and a plurality of second balls 142b (see fig. 6 in cooperation with the portion), the first balls 142a of the first sliding assisting device 138 and the second sliding assisting device 140 are supported between the first wall 122a of the third rail 106 and the first wall 126a of the second rail 104, and the second balls 142b of the first sliding assisting device 138 and the second sliding assisting device 140 are supported between the second wall 122b of the third rail 106 and the second wall 104 b.

As shown in fig. 3, 4 and 5, the limiting member 108 is disposed on the second rail 104, and the limiting member 108 has a first portion 130 and a second portion 132. Preferably, the limiting member 108 is fixedly disposed on the second rail 104, and the second portion 132 of the limiting member 108 extends substantially perpendicularly from the first portion 130. Preferably, the limiting member 108 is located adjacent to the first end 104a of the second rail 104, for example, but not limited thereto.

As shown in fig. 6 and 7, the second rail 104 and the third rail 106 can be at a predetermined position P (e.g., a retracted position as shown in fig. 6) relative to the first rail 102. Wherein the first rail 102 and the third rail 106 are supported relative to each other by the at least one sliding-assist device (e.g., the first bead 134a and the second bead 134 b); on the other hand, the third rail 106 and the second rail 104 are supported relative to each other by the at least one other slide assist device (e.g., the first slide assist device 138 and the second slide assist device 140). When the second rail 104 and the third rail 106 are at the predetermined position P relative to the first rail 102, a first predetermined distance K1 is provided between a first end (e.g., front end) of the at least one other sliding assisting device (e.g., the first sliding assisting device 138) and a first end 106a of the third rail 106, and a second predetermined distance K2 is provided between a first end (e.g., front end) of the at least one sliding assisting device (e.g., the first bead 134a and the second bead 134 b) and a first end 102a of the first rail 102 (as shown in fig. 6).

Further, when the second rail 104 and the third rail 106 are respectively displaced from the first rail 102 to a first extended position E1 and a second extended position E2 (as shown in fig. 7) along a first direction D1 (e.g., a longitudinal direction) from the predetermined position P, the limiting member 108 is away from the

front ends

102a, 106a of the first rail 102 and the third rail 106, and the at least one other sliding assisting device (e.g., the first sliding assisting device 138) and the at least one sliding assisting device (e.g., the first bead 134a and the second bead 134 b) are also displaced toward the first direction D1 to be respectively close to the first end 106a of the third rail 106 and the first end 102a of the first rail 102.

Preferably, the sliding rail assembly 100 further includes at least one supporting seat, such as a first supporting seat 144a disposed adjacent to the first wall 122a of the third rail 106, and a second supporting seat 144b disposed adjacent to the second wall 122b of the third rail 106, wherein the first supporting seat 144a and the second supporting seat 144b are close to the first end 106a of the third rail 106, and are located at a channel port of the channel of the third rail 106 as an example; the sliding rail assembly further includes two first blocking portions 145 (e.g., two front blocking portions) respectively disposed on the first wall 110a and the second wall 110b of the adjacent first rail 102, where the two first blocking portions 145 are close to the first end 102a of the first rail 102 and are located at the channel opening of the channel of the first rail 102. When the second rail 104 and the third rail 106 are respectively displaced to the first extended position E1 and the second extended position E2 in the first direction D1 relative to the first rail 102 (as shown in fig. 7), the at least one other sliding assisting device (e.g. the first sliding assisting device 138) is blocked by the first supporting seat 144a and the second supporting seat 144b of the third rail 106, and the at least one sliding assisting device (e.g. the first bead 134a and the second bead 134 b) is blocked by the two first blocking portions 145 of the first rail 102.

As shown in fig. 6, 8 and 9, when the second rail 104 and the third rail 106 are at the predetermined position P relative to the first rail 102, the first portion 130 of the limiting member 108 is disposed adjacent to the first ends (e.g., front ends) 102a, 104a, 106a of the first rail 102, the second rail 104 and the third rail 106, and the second portion 132 of the limiting member 108 is configured to prevent the first rail 102, the second rail 104 and the third rail 106 from being separated from each other in a second direction D2 (e.g., lateral or side direction), and the first direction D1 is substantially perpendicular to the second direction D2.

Preferably, when the second rail 104 and the third rail 106 are at the predetermined position P relative to the first rail 102, the spacing space S of the spacing feature 120 of the bracket 114 is used for the second portion 132 of the spacing member 108 to extend into, such that the second portion 132 of the spacing member 108 forms a spacing relationship with the upper portion 120a, the lower portion 120b and the middle portion 120c of the spacing feature 120 (as shown in fig. 8 and 9).

Preferably, when the second rail 104 and the third rail 106 are at the predetermined position P relative to the first rail 102, the first end (e.g., front end) of the at least one other sliding assisting device (e.g., the first sliding assisting device 138) and the first end 106a of the third rail 106 have the first predetermined distance K1 (as shown in fig. 6), and the first end (e.g., front end) of the at least one sliding assisting device (e.g., the first bead 134a and the second bead 134 b) and the first end 102a of the first rail 102 have the second predetermined distance K2 (as shown in fig. 6). That is, the track segments of the second track 104 within the first predetermined distance K1 are not supported by the at least one other slide assist device (e.g., the first slide assist device 138 and the second slide assist device 140), and the track segments of the third track 106 within the second predetermined distance K2 are not supported by the at least one slide assist device (e.g., the first bead 134a and the second bead 134 b), at which time, if a force (or external force) is applied to the track assembly 100, the track segments of the first track 102, the second track 104 and the third track 106 within the predetermined distances K1, K2 may not be effectively supported by each other so as to be affected by the force (or external force), causing the track segments of the first track 102, the second track 104 and the third track 106 to be separated from each other. Therefore, in this embodiment, a portion (e.g. the second portion 132) of the limiting member 108 is adjacent to a side L of the longitudinal wall 112 of the first rail 102 (or a side L of the middle supporting portion 118 of the bracket 114 of the first rail 102), for example, the portion (e.g. the second portion 132) of the limiting member 108 can be fastened to the side L of the longitudinal wall 112 of the first rail 102 (or fasten to the side L of the middle supporting portion 118 of the bracket 114 of the first rail 102), so as to prevent the first rail 102, the second rail 104 and the third rail 106 from moving or disengaging in the second direction D2 (e.g. laterally or laterally) relative to each other. That is, once the force is applied to the track assembly 100 in the second direction D2 (as shown in fig. 8 and 9), the portion (e.g., the second portion 132) of the stopper 108 is adjacent to the side L of the longitudinal wall 112 of the first rail 102 (or adjacent to the side L of the intermediate support portion 118 of the bracket 114 of the first rail 102), such that the portion (e.g., the second portion 132) of the stopper 108 and the side L of the longitudinal wall 112 of the first rail 102 (or the side L of the intermediate support portion 118 of the bracket 114 of the first rail 102) can contact each other to create a blocking effect for preventing the first rail 102, the second rail 104, and the third rail 106 from moving or disengaging relative to each other in the second direction D2 (e.g., laterally or laterally). The first portion 130 and the second portion 132 of the limiting member 108 together define a space for accommodating at least a portion of the first end 102a of the first rail 102 (or the middle portion 120c of the bracket 114) and at least a portion of the first end 106a of the third rail 106 (as shown in fig. 8 and 9).

Preferably, the first support 144a has a first groove 146, and the second support 144b has a second groove 148 (shown in fig. 8). On the other hand, the first wall 126a of the second rail 104 has a first support leg 150 extending into the first channel 146, and the second wall 126b of the second rail 104 has a second support leg 152 extending into the second channel 148. When the second rail 104 and the third rail 106 are at the predetermined position P relative to the first rail 102, the second rail 104 extends into the first groove 146 via the first supporting leg 150, and the second rail 104 extends into the second groove 148 via the second supporting leg 152, so as to prevent the second rail 104 and the third rail 106 from moving or disengaging relative to each other in the second direction D2 (as shown in fig. 8).

As described above, once the force is applied to the sliding rail assembly 100 in the second direction D2 (as shown in fig. 8 and 9), even if the first wall 126a and the second wall 126b of the portion of the rail section of the second rail 104 within the first predetermined distance K1 can be supported by the first support seat 144a and the second support seat 144b, respectively, if the applied force is large enough, the first support leg 150 of the first wall 126a and the second support leg 152 of the second wall 126b of the second rail 104 still may separate from the first groove 146 of the first support seat 144a and the second groove 148 of the second support seat 144b, respectively, in the second direction D2, causing the first wall 126a and the second wall 126b of the portion of the rail section of the second rail 104 within the first predetermined distance K1 to fail to be correctly positioned in the channel of the third rail 106, thus, the portion (e.g., the second portion 132) of the stopper 108 adjacent to the side edge L of the longitudinal wall 112 of the first rail 102 (or adjacent to the side edge L of the middle supporting portion 118 of the bracket 114 of the first rail 102) can be used to prevent the second rail 104 and the third rail 106 from moving toward the second direction D2 relative to each other (as shown in fig. 8), i.e., the stopper 108 can be used to ensure that the first supporting leg 150 of the first wall 126a and the second supporting leg 152 of the second wall 126b of the second rail 104 are not separated from the first groove 146 of the first supporting seat 144a and the second groove 148 of the second supporting seat 144b, respectively, so as to ensure that the second rail 104 is stably installed in the channel of the third rail 106 without being affected by the force (or external force), the slide rail assembly 100 is reliable and safe in use.

Fig. 10 and 11 show a sliding rail assembly 200 according to a second embodiment of the present invention, which includes a first rail 202, a second rail 204, a third rail 206, and a limiting member 208. The third rail 206 is movably mounted between the first rail 202 and the second rail 204.

As shown in fig. 11, 12 and 13, the limiting member 208 is disposed on the second rail 204, and the limiting member 208 has a first portion 230 and a second portion 232. Preferably, the limiting member 208 is fixedly disposed on the second rail 204, and the second portion 232 of the limiting member 208 extends substantially perpendicularly from the first portion 230. Preferably, the limiting member 208 is located adjacent to the first end 204a of the second rail 204, for example, but not limited thereto.

As shown in fig. 14, the second rail 204 and the third rail 206 can be at the predetermined position P (e.g., a retracted position) relative to the first rail 202. Wherein the first rail 202 and the third rail 206 are supported relative to each other by the at least one sliding-assist device (e.g., the first bead 234a and the second bead 234 b); on the other hand, the third rail 206 and the second rail 204 are supported relative to each other by the at least one other glider (e.g., the first glider 238 and the second glider 240). Wherein when the second rail 204 and the third rail 206 are at the predetermined position P relative to the first rail 202, a first predetermined distance K1 is provided between a first end (e.g., front end) of the at least one other sliding aid (e.g., the first sliding aid 238) and a first end 206a of the third rail 206.

As shown in fig. 14, 15 and 16, when the second rail 204 is at the predetermined position P relative to the third rail 206, the first portion 230 of the limiting member 208 is disposed adjacent to the first end portions (front end portions) 204a, 206a of the second rail 204 and the third rail 206, and the second portion 232 of the limiting member 208 is used to prevent the second rail 204 and the third rail 206 from being separated from each other in the second direction D2 (e.g. laterally or laterally, as shown in fig. 15 and 16). The first direction D1 and the second direction D2 are substantially perpendicular to each other.

Preferably, when the second rail 204 is at the predetermined position P relative to the third rail 206, the first end (e.g., front end) of the at least one other sliding aid (e.g., the first sliding aid 238) is at the first predetermined distance K1 (as shown in fig. 6) from the first end 206a of the third rail 206. That is, the track sections of the second track 204 within the first predetermined distance K1 cannot be supported by the at least one other sliding aid (e.g., the first sliding aid 238 and the second sliding aid 240), when the sliding rail assembly 200 receives a force (or external force), the track sections of the second track 204 and the third track 206 within the first predetermined distance K1 may not be effectively supported by each other so as to be affected by the force (or external force), resulting in the track sections of the second track 204 and the third track 206 being separated from each other. Thus, this embodiment can prevent the second rail 204 and the third rail 206 from moving or disengaging in the second direction D2 (e.g., laterally or laterally) relative to each other by a portion (e.g., the second portion 232) of the stop 208 adjacent to a side L 'of the longitudinal wall 224 of the third rail 206, e.g., the portion (e.g., the second portion 232) of the stop 208 can catch the side L' of the longitudinal wall 224 of the third rail 206. That is, once the force is applied to the track assembly 200 in the second direction D2 (as shown in fig. 15 and 16), the portion (e.g., the second portion 232) of the stopper 208 is adjacent to the side L 'of the longitudinal wall 224 of the third rail 206, such that the portion (e.g., the second portion 232) of the stopper 208 and the side L' of the longitudinal wall 224 of the third rail 206 can contact each other to generate a blocking effect for preventing the second rail 204 and the third rail 206 from moving or disengaging in the second direction D2 (e.g., laterally or laterally) relative to each other. The first portion 230 and the second portion 232 of the limiting member 208 together define a space for accommodating at least a portion of the first end 206a of the third rail 206.

Preferably, the first support 244a has a first groove 246 and the second support 244b has a second groove 248. On the other hand, the first wall 226a of the second rail 204 has a first support leg 250 extending into the first groove 246, and the second wall 226b of the second rail 204 has a second support leg 252 extending into the second groove 248. When the second rail 204 is at the predetermined position P relative to the third rail 206, the second rail 204 extends into the first groove 246 via the first supporting leg 250, and the second rail 204 extends into the second groove 248 via the second supporting leg 252, so as to prevent the second rail 204 and the third rail 206 from moving or disengaging relative to each other in the second direction D2 (as shown in fig. 15 and 16).

As mentioned above, once the force is applied to the slide rail assembly 200 in the second direction D2 (as shown in fig. 14, 15 and 16), even if the first wall 226a and the second wall 226b of a portion of the rail section of the second rail 204 within the first predetermined distance K1 can be supported by the first support base 244a and the second support base 244b, respectively, if the applied force is large enough, the first support leg 250 of the first wall 226a and the second support leg 252 of the second wall 226b of the second rail 204 still may be separated from the first groove 246 of the first support base 244a and the second groove 248 of the second support base 244b in the second direction D2, respectively, causing the first wall 226a and the second wall 226b of a portion of the rail section of the second rail 204 within the first predetermined distance K1 to be not correctly located in the channel of the third rail 206. Therefore, the side edge L' of the longitudinal wall 224 of the third rail 206 adjacent to the portion (e.g., the second portion 232) of the limiting member 208 according to the present invention can be used to prevent the second rail 204 and the third rail 206 from moving in the second direction D2 (as shown in fig. 15 and 16) relative to each other, i.e., the limiting member 208 can be used to ensure that the first supporting leg 250 of the first wall 226a and the second supporting leg 252 of the second wall 226b of the second rail 204 are not separated from the first groove 246 of the first supporting seat 244a and the second groove 248 of the second supporting seat 244b, respectively, so that the second rail 204 can be stably installed in the channel of the third rail 206 without being affected by the force (or external force) when installed in the channel of the third rail 206, and the sliding rail assembly 200 has reliability and safety in use.

Fig. 17 shows an embodiment of the second rail 300 according to the third embodiment of the invention. Specifically, unlike the first embodiment, the stopper 108 is an additional member attached to the second rail 104, and the second rail 300 of this embodiment is directly integrated with the stopper 302, that is, the second rail 300 is directly formed with the stopper 302.

While the invention has been described with reference to the present specific embodiments, it will be appreciated by those skilled in the art that the above embodiments are for illustration only, and that various equivalent changes and modifications may be made without departing from the spirit of the invention, and therefore, all changes and modifications to the above embodiments are intended to be within the scope of the claims of the present application as long as they come within the true spirit of the invention.

Claims

1. A sliding rail assembly comprises a first rail, a second rail and a third rail, wherein the first rail comprises a first wall, a second wall and a longitudinal wall which are connected between the first wall and the second wall of the first rail; the second rail comprises a first wall, a second wall and a longitudinal wall which are connected between the first wall and the second wall of the second rail; the third rail is movably installed between the first rail and the second rail, and the second rail and the third rail can be displaced along a first direction from a folding position relative to the first rail, and the third rail is characterized in that:

the sliding rail assembly also comprises a limiting piece, wherein the limiting piece is provided with a first part and a second part;

when the second rail and the third rail are at the folding position relative to the first rail, the first part of the limiting piece is arranged at the front end parts of the adjacent first rail, second rail and third rail, and the second part of the limiting piece is used for preventing the first rail, the second rail and the third rail from separating from each other in a second direction, and the first direction and the second direction are in a substantially vertical direction relation.

2. The slide rail assembly of claim 1 wherein the first rail is provided with a bracket fixedly coupled to the first rail, the bracket having a spacing feature comprising an upper portion, a lower portion and an intermediate portion, the upper portion, the lower portion and the intermediate portion together defining a spacing space for the second portion of the spacing member to extend into a spacing relationship with the upper portion, the lower portion and the intermediate portion of the spacing feature.

3. The slide rail assembly of claim 2 wherein the bracket has an upper support portion, a lower support portion and an intermediate support portion connected between the upper support portion and the lower support portion, the upper support portion being positioned adjacent a first wall of the first rail, the lower support portion being positioned adjacent a second wall of the first rail, the intermediate support portion being positioned adjacent a longitudinal wall of the first rail.

4. The slide assembly of claim 3 wherein the limit feature is a notch pattern.

5. The slide assembly of claim 2 wherein the intermediate portion of the stop feature is located adjacent the front end of the first rail and the upper and lower portions of the stop feature are located beyond the front end of the first rail.

6. The slide assembly of claim 1, wherein the stop is fixedly disposed on the second rail.

7. The slide assembly of claim 6 wherein the stop is integral with the second rail.

8. The slide assembly of claim 6 wherein the second portion of the stop member extends substantially perpendicularly from the first portion.

9. The track assembly of claim 6, wherein the stop member is spaced apart from the front ends of the first track and the third track when the second track and the third track are displaced from the retracted position to an extended position relative to the first track.

10. The slide assembly of claim 1 further comprising at least one slide assist device, and the first rail, the second rail, and the third rail are supported relative to one another by the at least one slide assist device.

11. A sliding rail assembly comprises a first rail, a second rail and a third rail, wherein the first rail comprises a first wall, a second wall and a longitudinal wall which are connected between the first wall and the second wall of the first rail; the second rail comprises a first wall, a second wall and a longitudinal wall which are connected between the first wall and the second wall of the second rail; the third rail is movably installed between the first rail and the second rail, and the third rail comprises a first wall, a second wall and a longitudinal wall connected between the first wall and the second wall of the third rail, and is characterized in that:

the sliding rail assembly also comprises a limiting piece arranged on the second rail;

wherein two of the first rail, the second rail and the third rail are supported relative to each other by at least one sliding-assisting device;

when the second rail and the third rail are at a preset position relative to the first rail, a preset distance is reserved between one end of the at least one sliding assisting device and a first end of the first rail, and one part of the limiting piece is adjacent to one side edge of the longitudinal wall of the first rail.

12. The slide rail assembly of claim 11 wherein the first rail is provided with a bracket having a limit feature comprising an upper portion, a lower portion and an intermediate portion, the upper portion, lower portion and intermediate portion together defining a limit space for the portion of the limit member to extend into in limiting relationship with the upper portion, lower portion and intermediate portion of the limit feature.