CN112576624B

CN112576624B - Sliding rail assembly

Info

Publication number: CN112576624B
Application number: CN201910923745.8A
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: 2019-09-27
Filing date: 2019-09-27
Publication date: 2022-07-29
Anticipated expiration: 2039-09-27
Also published as: CN112576624A

Abstract

The invention relates to a slide rail assembly, which comprises a first rail, a second rail, a first sliding assisting device and a second sliding assisting device. The second rail can move relative to the first rail; the first sliding-assistant device and the second sliding-assistant device are arranged on the first rail; when the second rail is at a folding position relative to the first rail, the first sliding-assistant device and the second sliding-assistant device are used for supporting the second rail.

Description

Sliding rail assembly

Technical Field

The present invention relates to a slide rail mechanism, and more particularly to a slide rail assembly having at least two sliding aids disposed between two slide rails.

Background

As shown in fig. 1, the conventional slide rail assembly 100 includes a plurality of relatively movable slide rails, such as an outer rail 102, a middle rail 104 and an inner rail 106. The sliding rails 102, 104, 106 are usually provided with a sliding assisting device therebetween, for example, a sliding assisting device 108 is provided between the middle rail 104 and the inner rail 106, and the sliding assisting device 108 usually comprises a plurality of balls capable of being supported between the middle rail 104 and the inner rail 106 to facilitate smooth displacement between the two. In the prior art, when the slide rail assembly 100 is in a folded state, so that the inner rail 106 is folded relative to the middle rail 104, the sliding assistant device 108 is usually only approximately supported at the middle section of the inner rail 106, and therefore, a rear section K of the inner rail 106 is not supported by (the balls of) the sliding assistant device 108, so that the rear section K of the inner rail 106 may be easily deformed or warped due to external force or gravity of a load.

The invention of U.S. patent No. US 8,303,183B 2 by Chen et al is designed to solve the above problems by additionally installing a ball shaft member at the end of the inner rail. However, such ball shaft member will move synchronously with the inner rail and occupy the channel space at the end of the inner rail, so that it is not easy to design an interaction mechanism (e.g. a synchronization mechanism, a positioning mechanism, etc.) between the inner rail and the middle rail, thereby affecting the functionality of the slide rail.

Disclosure of Invention

The invention aims to provide a slide rail assembly with two sliding-assistant devices arranged between two slide rails.

According to an aspect of the present invention, a slide rail assembly includes a first rail, a second rail, a first sliding aid and a second sliding aid. The second rail is longitudinally displaceable relative to the first rail; the first and second sliding-assistant devices are arranged on the first rail and both comprise a plurality of rolling pieces; when the second rail is in a folding position relative to the first rail, the rolling pieces of the first sliding assisting device and the rolling pieces of the second sliding assisting device are respectively used for supporting different parts of the second rail; when the second rail moves from the folding position to a first direction to an opening preset stroke, the second sliding-assistant device moves to a preset position along with the second rail in the first direction.

Preferably, the second rail has a front section and a rear section; when the second rail is in the retracted position relative to the first rail, the rolling members of the second sliding assistance device are used for supporting at least one part of the rear section of the second rail.

Preferably, the slide rail assembly further comprises a first working member disposed on the first rail, and the second sliding-aid device comprises a supporting portion; when the second sliding-assistant device is at the preset position, the second sliding-assistant device blocks the first work piece in a state through the abutting part, so as to prevent the second sliding-assistant device from moving from the preset position to a second direction opposite to the first direction.

Preferably, the first operating member is movably mounted to the first rail, the slide assembly further comprises a third rail, and the first rail is movably mounted between the third rail and the second rail, the third rail comprises a release mechanism; when the first rail moves to a predetermined return stroke relative to the third rail in the second direction, the first working member is driven by the release mechanism to be no longer in the state, so as to allow the second sliding-assistant device to move from the predetermined position to the second direction.

Preferably, the slide rail assembly further comprises a first elastic member for providing an elastic force to the first working member.

Preferably, the first rail further comprises a first limiting feature, and when the second sliding assisting device is located at the predetermined position, the second sliding assisting device and the first limiting feature block each other to prevent the second sliding assisting device from moving from the predetermined position to the first direction.

Preferably, the slide rail assembly further comprises a second working member disposed to the first rail, and when the second rail moves from the retracted position to the first direction relative to the first rail, the second rail can drive the first rail through the second working member, so that the second rail and the first rail move synchronously to the first direction relative to the third rail.

Preferably, the second operating member is movably mounted to the first rail, and the rail assembly further includes a second elastic member for providing an elastic force to the second operating member.

Preferably, the first rail includes a first wall, a second wall and a longitudinal wall connected between the first wall and the second wall of the first rail, and the first wall, the second wall and the longitudinal wall of the first rail together define a channel for receiving the second rail.

Preferably, the second rail comprises a first wall, a second wall and a longitudinal wall connected between the first wall and the second wall of the second rail; the second sliding-assistant device comprises a first edge part and a second edge part, and the rolling pieces of the second sliding-assistant device are arranged on the first edge part and the second edge part of the second sliding-assistant device; when the second rail is in the retracted position, the rolling members of the second sliding assistance device are used for at least supporting the first wall and the second wall of the second rail.

Preferably, the first sliding aid device comprises a first edge and a second edge, and the rolling members of the first sliding aid device are arranged on the first edge and the second edge of the first sliding aid device to support the first wall and the second wall of the second rail.

According to another aspect of the present invention, a slide rail assembly includes a first rail, a second rail, a first sliding aid, a second sliding aid, and a first working member. The second rail can move relative to the first rail; the first sliding-assistant device and the second sliding-assistant device are arranged on the first rail, and the second sliding-assistant device comprises a butting part; the first working member is movably mounted to the first rail so as to be capable of being in one of a first state and a second state; when the second rail is in a folding position relative to the first rail, the first sliding assisting device and the second sliding assisting device are respectively used for supporting different parts of the second rail; when the second rail moves from the folding position to a first direction to an opening preset stroke, the second sliding-assistant device moves to a preset position along with the second rail in the first direction; when the second sliding-assistant device is at the preset position, the second sliding-assistant device is blocked with the first work piece in the second state through the abutting part, so as to prevent the second sliding-assistant device from moving from the preset position to a second direction opposite to the first direction.

Preferably, the slide rail assembly further comprises a third rail and a second working member; the first rail is movably arranged between the third rail and the second rail, and the second working piece is movably arranged on the first rail and can be in one of a first preset state and a second preset state; when the second rail moves from the retracted position to the first direction relative to the first rail, the second rail can drive the first rail through the second workpiece in the first predetermined state, so that the second rail and the first rail synchronously move in the first direction relative to the third rail.

Preferably, the third rail is further provided with a positioning mechanism, and the positioning mechanism comprises a guiding feature, a blocking feature and an intermediate feature arranged between the guiding feature and the blocking feature; when the second rail and the first rail continue to synchronously move towards the first direction relative to the third rail, the second working piece is guided to the middle feature by the guiding feature of the positioning mechanism, so that the second working piece is supported by the middle feature of the positioning mechanism and is switched from the first predetermined state to the second predetermined state, and the second rail and the first rail do not synchronously move towards the first direction relative to the third rail any more.

Preferably, when the first rail moves to an extended position relative to the third rail in the first direction, the second operating member in the first predetermined state can be engaged with the blocking feature of the positioning mechanism to prevent the first rail from moving to the second direction from the extended position relative to the third rail.

Preferably, when the second rail is displaced to a stroke from an open position to the second direction relative to the first rail, the second rail can push against the second working member, so that the second working member is switched from the first predetermined state to the second predetermined state, and the second working member is released from the blocking feature of the positioning mechanism, so as to allow the first rail to be displaced from the extended position to the second direction.

Preferably, the first workpiece has a drive feature; when the second rail continues to move in the second direction, the second rail contacts with the driving feature of the first workpiece in the second state, so that the second rail and the first rail can synchronously move in the second direction relative to the third rail, and the end parts of the second rail and the first rail can maintain a preset distance.

Preferably, the third rail is further provided with a release mechanism; when the second rail and the first rail move to a predetermined return stroke in the second direction relative to the third rail, the first working member is driven by the release mechanism to switch the first working member from the second state to the first state, so as to allow the second sliding assistance device to move from the predetermined position to the second direction.

Preferably, the slide assembly further includes a second elastic member for providing an elastic force to the second working member.

Drawings

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

fig. 1 is a perspective view of a slide rail assembly according to the prior art.

Fig. 2 is a schematic perspective view of a slide rail assembly according to an embodiment of the invention.

Fig. 3 is an exploded view of the first rail, the second rail and the third rail of the slide rail assembly according to the embodiment of the invention.

Fig. 4 is an exploded view of the first rail and two working members of the slide rail assembly according to the embodiment of the invention.

Fig. 5 is a schematic view showing the assembly of the first rail and two working members of the slide rail assembly according to the embodiment of the invention.

Fig. 6 is a schematic view illustrating a slide rail assembly in a retracted state according to an embodiment of the present invention.

Fig. 7 is a schematic view illustrating that the first rail and the second rail of the slide rail assembly according to the embodiment of the invention can move in a first direction relative to the third rail.

Fig. 8 is a schematic view illustrating that the first rail and the second rail of the slide rail assembly of the embodiment of the invention can synchronously move toward the first direction relative to the third rail.

Fig. 9 is a schematic view illustrating that the first rail and the second rail of the slide rail assembly according to the embodiment of the invention can continuously and synchronously move in the first direction relative to the third rail.

Fig. 10 is a schematic view illustrating that the first rail and the second rail of the slide rail assembly do not synchronously move in the first direction relative to the third rail.

Fig. 11 is a schematic view illustrating a slide rail assembly according to an embodiment of the invention in an extended state.

Fig. 12 is a schematic view illustrating that the first rail of the slide rail assembly of the embodiment of the invention is at an extended position relative to the third rail, and the second rail is displaced in a second direction relative to the first rail.

Fig. 13 is an enlarged view of the region a of fig. 12.

Fig. 14 is a schematic view illustrating that the first rail of the slide rail assembly of the embodiment of the invention is at the extended position relative to the third rail, and the second rail continues to move in the second direction relative to the first rail.

Fig. 15 is a schematic view illustrating that the second rail and the first rail of the slide rail assembly of the embodiment of the invention can synchronously displace toward the second direction relative to the first rail.

Fig. 16 is a schematic view illustrating the second rail and the first rail of the slide rail assembly of the embodiment of the invention synchronously moving to the second direction continuously relative to the first rail.

Fig. 17 is a schematic view illustrating that the second rail and the first rail of the slide rail assembly according to the embodiment of the invention can move in the second direction relative to the first rail without being synchronized.

Fig. 18 is a partial schematic view illustrating the slide rail assembly in the retracted state according to the embodiment of the present invention.

Detailed Description

As shown in fig. 2 and 3, a slide rail assembly 20 according to an embodiment of the present invention includes a first rail 22, a second rail 24, a first sliding assistance device 26 and a second sliding assistance device 28, and preferably, the slide rail assembly 20 further includes a third rail 30. Wherein the first rail 22 is movably mounted between the third rail 30 and the second rail 24.

The third rail 30 includes a first wall 32a, a second wall 32b and a longitudinal wall 34 connected between the first wall 32a and the second wall 32b of the third rail 30. The first wall 32a, the second wall 32b and the longitudinal wall 34 of the third rail 30 together define a channel for receiving the first rail 22. In addition, the third rail 30 has a front end f3 and a rear end r 3. Preferably, the longitudinal wall 34 of the third rail 30 is provided with a release mechanism 36 and a positioning mechanism 38. Wherein, compared to the positioning mechanism 38, the release mechanism 36 is closer to the rear end r3 of the third rail 30; on the other hand, the positioning mechanism 38 is farther from the rear end r3 of the third rail 30 than the release mechanism 36.

Preferably, the release mechanism 36 includes a supporting portion 36a and a releasing portion 36b adjacent to the supporting portion 36a, and the releasing portion 36b is, for example, an inclined surface or an arc surface, but the implementation is not limited thereto.

Preferably, the positioning mechanism 38 includes a guide feature 38a, a stop feature 38b, and an intermediate feature 38c disposed between the guide feature 38a and the stop feature 38 b. The guiding feature 38a is, for example, a slope or a curved surface, the blocking feature 38b is, for example, a wall or a recess, and the middle feature 38c is substantially a plane, but not limited to the implementation.

The first rail 22 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 first rail 22. The first wall 40a, the second wall 40b and the longitudinal wall 42 of the first rail 22 together define a channel for receiving the second rail 24. In addition, the first rail 22 has a front end f1 and a rear end r 1.

The first and second sliding

aids

26 and 28 are disposed on the first rail 22. Preferably, the first and second sliding assist

devices

26, 28 are disposed within the channel of the first rail 22. The first and second sliding

aids

26 and 28 each include a plurality of rolling elements. For example, the first sliding aid 26 includes a plurality of first rolling elements 44, and the second sliding aid 28 includes a plurality of second rolling elements 46. The rolling

members

44, 46 may be balls or rollers, but are not limited in implementation.

The second rail 24 includes a first wall 45a, a second wall 45b and a longitudinal wall 47 connected between the first wall 45a and the second wall 45b of the second rail 24. In addition, the second rail 24 has a front end f2 and a rear end r 2. The second rail 24 has a synchronization feature 25, and the synchronization feature 25 is exemplified by a wall of a hole H, but is not limited in implementation.

Preferably, the first slip aid 26 includes a first side portion 48a, a second side portion 48b, and a longitudinal portion 48c connected between the first side portion 48a and the second side portion 48 b. The first side portion 48a, the second side portion 48b, and the longitudinal portion 48c of the first sliding assist device 26 are positioned to correspond to the first wall 40a, the second wall 40b, and the longitudinal wall 42 of the first rail 22, respectively. The first rolling elements 44 of the first slip aid 26 are disposed at the first edge 48a and the second edge 48b of the first slip aid 26.

Preferably, the second slip aid 28 includes a first side portion 50a, a second side portion 50b and a longitudinal portion 50c connected between the first side portion 50a and the second side portion 50 b. The first side 50a, the second side 50b, and the longitudinal side 50c of the second sliding assist device 28 are positioned to correspond to the first wall 40a, the second wall 40b, and the longitudinal wall 42 of the first rail 22, respectively. The second rolling elements 46 of the second slip aid 28 are disposed at the first edge 50a and the second edge 50b of the second slip aid 28.

When the second rail 24 is located at a retracted position R relative to the first rail 22, the first sliding assistance device 26 and the second sliding assistance device 28 are respectively configured to support different portions of the second rail 24 (as shown in fig. 2).

As shown in fig. 3, 4 and 5, the longitudinal wall 42 of the first rail 22 has a first opening 52 and a second opening 54, and the first opening 52 and the second opening 54 communicate with a first side L1 and a second side L2 of the longitudinal wall 42 of the first rail 22. Wherein the first side L1 is adjacent to (the longitudinal wall 34 of) the third rail 30 and the second side L2 is adjacent to (the longitudinal wall 47 of) the second rail 24.

Preferably, the slide rail assembly 20 further includes a first operating member 56 and a second operating member 58 mounted to the first rail 22. Here, the first operating member 56 and the second operating member 58 are movably mounted on the first rail 22. For example, the first operating member 56 and the second operating member 58 are pivotally connected to the longitudinal wall 42 of the first rail 22 via a first axis X1 and a second axis X2, respectively.

Preferably, the slide assembly 20 further includes a first elastic member 60 and a second elastic member 62 for providing an elastic force to the first operating member 56 and the second operating member 58, respectively.

Preferably, the longitudinal portion 50c of the second sliding aid 28 has a space 64, and the first operating member 56 and the second operating member 58 are located in the space 64.

Preferably, the second sliding aid 28 includes a support portion 65. For example, the abutting portion 65 is disposed on the longitudinal portion 50c of the second sliding assistance device 28, and the abutting portion 65 is adjacent to the space 64, here, the abutting portion 65 is taken as a protrusion, but the implementation is not limited thereto.

Preferably, the first rail 22 further includes a first stop feature 66 and a second stop feature 68. The first stop feature 66 and the second stop feature 68 are, for example, a protrusion, but are not limited in implementation. The first stop feature 66 and the second stop feature 68 are configured to provide a limited range of longitudinal displacement of the second sliding assist device 28 relative to the first rail 22.

Preferably, the first operating member 56 has a first extending portion 56a, and the first extending portion 56a passes through the first opening 52 of the first rail 22 and faces the longitudinal wall 34 of the third rail 30; on the other hand, the second operating member 58 has a second extension 58a passing through the second opening 54 of the first rail 22 and facing the longitudinal wall 34 of the third rail 30, and a corresponding feature 58b for cooperating with the synchronization feature 25.

As shown in fig. 6, the slide rail assembly 20 is in a retracted state. The first rail 22 is folded relative to the third rail 30, and the second rail 24 is folded relative to the first rail 22.

Preferably, a rear stop structure 70 (e.g., a protrusion, such as that shown in fig. 3) is disposed adjacent the rear end r3 of the third rail 30, and the rear stop structure 70 is adapted to provide a stop for the rear end r3 of the first rail 22 when the first rail 22 is retracted relative to the third rail 30.

Preferably, the slide rail assembly 20 further comprises at least one sliding-assisting structure disposed in the channel of the third rail 30 for supporting the first rail 22. Here, the sliding-assistant structure includes a first sliding-assistant portion 72a and a second sliding-assistant portion 72b as an example, but the number of the sliding-assistant structure is not limited in implementation. The first and second sliding-

assistant portions

72a and 72b are respectively used for supporting the first and

second walls

40a and 40b of the first rail 22, and the first and second sliding-

assistant portions

72a and 72b include a plurality of third rolling members 74, such as balls or rollers, for assisting the smoothness of the displacement of the first rail 22 relative to the third rail 30. Preferably, the first rail 22 has at least one pushing portion, such as a first pushing portion 76a and a second pushing portion 76 b; and, at least one front blocking structure, such as a first front blocking structure 78a and a second front blocking structure 78b, is disposed adjacent to the front end f3 of the third rail 30. The first sliding assisting portion 72a is located between the first pushing portion 76a and the first front blocking structure 78a, and the second sliding assisting portion 72b is located between the second pushing portion 76b and the second front blocking structure 78 b.

Further, the second rail 24 has a front section, a middle section and a rear section K1. When the second rail 24 is located at the retracted position R relative to the first rail 22, the first rolling members 44 of the first sliding assistance device 26 and the second rolling members 46 of the second sliding assistance device 28 are respectively used for supporting different portions of the second rail 24. The second rolling members 46 of the second sliding assistance device 28 are configured to support at least a portion of the first wall 45a and the second wall 45b of the rear section K1 of the second rail 24 (see also fig. 2), and the first rolling members 44 of the first sliding assistance device 26 are configured to support the other rail sections K2 (see also fig. 2) other than the rear section K1 of the second rail 24, for example, the first rolling members 44 of the first sliding assistance device 26 are configured to support the middle section of the second rail 24 and/or a portion of the first wall 45a and the second wall 45b of the front section. In addition, the second operating member 58 is at a predetermined longitudinal distance from the positioning mechanism 38. Wherein the second operating member 58 can be maintained in a first predetermined state S1 by the second elastic member 62 being in a state of releasing an elastic force; on the other hand, the first operating member 56 is supported on the supporting portion 36a of the release mechanism 36 through the first extending portion 56a, so that the first elastic member 60 is in a state of accumulating an elastic force and is maintained in a first state Y1. And the second sliding aid 28 is in an initial position M1, and a first predetermined portion 75 of the second sliding aid 28 can abut against the second limit feature 68. The synchronization feature 25 of the second rail 24 is at a distance from the corresponding feature 58b of the second working member 58.

As shown in fig. 7, when the second rail 24 is longitudinally displaced a distance relative to the first rail 22 from the retracted position R in a first direction D1, the synchronization feature 25 of the second rail 24 contacts the corresponding feature 58b of the second operating member 58. At this time, the first sliding assistance device 26 and the second sliding assistance device 28 are also displaced toward the first direction D1.

As shown in fig. 8, when the second rail 24 is further displaced from the retracted position R to the first direction D1 relative to the first rail 22, the second rail 24 contacts the corresponding feature 58b of the second operating member 58 via the synchronization feature 25 to drive the first rail 22, so that the second rail 24 and the first rail 22 can be synchronously displaced to the first direction D1 relative to the third rail 30. On the other hand, the first extending portion 56a of the first operating member 56 is no longer supported by the supporting portion 36a of the release mechanism 36, so that the first operating member 56 is converted from the first state Y1 to a second state Y2 by the first elastic member 60 releasing the elastic force.

As shown in fig. 9, as the second rail 24 and the first rail 22 continue to synchronously displace in the first direction D1 relative to the third rail 30, the second extension 58a of the second operating member 58 contacts the guide feature 38a of the positioning mechanism 38. At this time, the second working member 58 is still in the first predetermined state S1.

As shown in fig. 10, when the second rail 24 and the first rail 22 are further synchronously displaced toward the first direction D1 relative to the third rail 30, the second extending portion 58a of the second operating member 58 is guided by the guiding feature 38a of the positioning mechanism 38 to the middle feature 38c, so that the second operating member 58 is supported by the middle feature 38c of the positioning mechanism 38 to be switched from the first predetermined state S1 to a second predetermined state S2, and the second elastic member 62 is in a state of accumulating the elastic force. At this time, since the second operating member 58 pivots by an angle to the second predetermined state S2, the synchronizing feature 25 of the second rail 24 no longer contacts the corresponding feature 58b of the second operating member 58, so that the second rail 24 and the first rail 22 are no longer synchronously displaced in the first direction D1 relative to the third rail 30. In other words, the second rail 24 and the first rail 22 can be independently displaced in the first direction D1 relative to the third rail 30. In addition, the abutting portion 65 of the second sliding aid 28 can contact a guiding feature 56b of the first operating member 56, preferably, the guiding feature 56b is a slope or a cambered surface.

As shown in fig. 11, when the first rail 22 is displaced relative to the third rail 30 in the first direction D1 to an extended position P, the second operating member 58 is displaced from the middle feature 38c to the stop feature 38b, and the second operating member 58 can be restored to the first predetermined state S1 again in response to the second elastic member 62 releasing the elastic force, and the second extending portion 58a of the second operating member 58 is caught by the stop feature 38b of the positioning mechanism 38, so as to prevent the first rail 22 from being displaced from the extended position P in a second direction D2 opposite to the first direction D1. Preferably, the first pushing portion 76a and the second pushing portion 76b of the first rail 22 can push the rear ends of the first sliding assisting portion 72a and the second sliding assisting portion 72b toward the first direction D1, so that the front ends of the first sliding assisting portion 72a and the second sliding assisting portion 72b are blocked by the first front blocking structure 78a and the second front blocking structure 78b of the third rail 30, respectively.

In addition, when the first rail 22 is in the extended position P relative to the third rail 30, the second rail 24 can still be displaced relative to the first rail 22 in the first direction D1, so that the slide rail assembly 20 is in an extended state. Further, when the first rail 22 is at the extended position P, and the second rail 24 is displaced to an open predetermined stroke relative to the first rail 22 in the first direction D1, the second sliding assistance device 28 is displaced to a predetermined position M2 along with the second rail 24 in the first direction D1, and a second predetermined portion 80 of the second sliding assistance device 28 can abut against the first limit feature 66, so that the second sliding assistance device 28 and the first limit feature 66 block each other, so as to prevent the second sliding assistance device 28 from being displaced from the predetermined position M2 to the first direction D1. When the second sliding aid 28 is at the predetermined position M2, the second sliding aid 28 is blocked by the abutting portion 65 and the first operating member 56 in the second state Y2, so as to prevent the second sliding aid 28 from being displaced from the predetermined position M2 to the second direction D2. In other alternative embodiments, when the second sliding assistance device 28 is at the predetermined position M2, the second sliding assistance device 28 can be blocked between the first operating member 56 in the second state Y2 and the second operating member 58 in the first predetermined state S1 by the abutting portion 65, and the second sliding assistance device 28 can also be prevented from being displaced from the predetermined position M2 to the first direction D1 or the second direction D2.

It should be noted that, when the second sliding assistance device 28 is displaced to the predetermined position M2 in the first direction D1, the second sliding assistance device 28 can push against the guiding feature 56b of the first working member 56 through the abutting portion 65, so that the first working member 56 slightly pivots, until the abutting portion 65 of the second sliding assistance device 28 passes over the first working member 56, the second sliding assistance device 28 can be located at the predetermined position M2, and the first working member 56 is kept in the second state Y2 by the elastic force of the first elastic member 60. Alternatively, in another state not shown, the present invention can also be implemented such that after the abutting portion 65 of the second sliding assistance device 28 first passes over the first working member 56, the first working member 56 is switched from the first state Y1 to the second state Y2 by the releasing mechanism 36. The above two embodiments are all possible, but are not limited in implementation.

As shown in fig. 12, 13 and 14, the second operating member 58 further has a tripping portion 58c, and here, the tripping portion 58c is adjacent to the corresponding feature 58b as an example.

When the second rail 24 is displaced to a stroke from an open position (such as a fully extended position, but not limited to) relative to the first rail 22 in the second direction D2, a portion of the second rail 24 (such as the rear end r2 of the second rail 24, but not limited to) can push against the releasing portion 58c of the second operating member 58, so that the second operating member 58 is switched from the first predetermined state S1 (shown in fig. 12 and 13) to the second predetermined state S2 (shown in fig. 14), and the second extending portion 58a of the second operating member 58 is released from the blocking feature 38b of the positioning mechanism 38, so as to allow the first rail 22 to be displaced from the extended position P (shown in fig. 12) in the second direction D2.

As shown in FIG. 15, the first working member 56 also has a drive feature 56c, here, for example, the drive feature 56c is adjacent to the guide feature 56 b. As the second rail 24 continues to displace in the second direction D2, the portion of the second rail 24 (e.g., the rear end r2 of the second rail 24, but not limited to) contacts the drive feature 56c of the first workpiece 56 in the second state Y2, such that the second rail 24 and the first rail 22 can displace synchronously in the second direction D2 relative to the third rail 30. In addition, the first working member 56 is at a longitudinal distance from the release mechanism 36. It should be noted that the characteristic of the synchronous displacement of the second rail 24 and the first rail 22 in the second direction D2 is as follows: the ends of the second rail 24 and the first rail 22 (e.g., the front ends f2 and f1 thereof) can maintain a predetermined distance G, so as to prevent the predetermined distance G from being shortened and thereby pinching the fingers of the user when the second rail 24 is folded relative to the first rail 22 in the second direction D2; alternatively, if the second rail 24 carries a load, the second rail 24 and the first rail 22 are displaced synchronously in the second direction D2, which is helpful to increase the overall supporting strength of the load.

As shown in fig. 16, when the second rail 24 and the first rail 22 continue to synchronously displace relative to the third rail 30 in the second direction D2, the first extending portion 56a of the first operating member 56 contacts the releasing portion 36b of the release mechanism 36.

As shown in fig. 17, when the second rail 24 and the first rail 22 are further displaced to a predetermined return stroke in the second direction D2 relative to the third rail 30, the first extending portion 56a of the first operating member 56 is driven to the supporting portion 36a by the releasing portion 36b of the releasing mechanism 36, so that the first operating member 56 is no longer in the state (e.g., the first operating member 56 is restored from the second state Y2 to the first state Y1), so as to allow the second sliding assisting device 28 to be displaced from the predetermined position M2 to the second direction D2. The first rail 22 can be folded relative to the third rail 30.

As shown in fig. 18, when the first rail 22 is folded relative to the third rail 30, the second rail 24 can move in the second direction D2 relative to the first rail 22, and the second sliding assistance device 28 can also move in the second direction D2 until the slide rail assembly 20 returns to the folded state.

From the above description, it can be seen that the enhanced efficacy and advantages of the present invention are:

1. When the second rail 24 is located at the retracted position R relative to the first rail 22, the first rolling members 44 of the first sliding assistance device 26 and the second rolling members 46 of the second sliding assistance device 28 are respectively used for supporting different portions of the second rail 24. Wherein the second rolling members 46 of the second sliding aid 28 are used for supporting at least a part of the rear section K1 of the second rail 24.

2. The second sliding assist device 28 is displaceable relative to the first rail 22. When the second sliding assisting device 28 moves to the predetermined position M2 in the first direction D1, the second sliding assisting device 28 can block the first operating member 56 in the second state Y2 through the abutting portion 65, so as to prevent the second sliding assisting device 28 from moving from the predetermined position M2 to the second direction D2.

3. When the second rail 24 is displaced from an open position in the second direction D2, a portion of the second rail 24 (e.g., the rear end r2 of the second rail 24) contacts the driving feature 56c of the first operating member 56 in the second state Y2, so that the second rail 24 and the first rail 22 can be synchronously displaced relative to the third rail 30 in the second direction D2. This is characterized, for example, in that the ends of the second rail 24 and the first rail 22 (e.g., the front ends f2 and f1 thereof) can maintain a predetermined distance G, so as to prevent the predetermined distance G from being shortened and thereby pinching the fingers of the user when the second rail 24 is folded relative to the first rail 22 in the second direction D2.

4. When the second rail 24 and the first rail 22 are displaced to a predetermined return stroke in the second direction D2 relative to the third rail 30, the first operating member 56 in the second state Y2 is driven by the releasing portion 36b of the release mechanism 36 to be in the first state Y1, so as to allow the second sliding assistance device 28 to be displaced from the predetermined position M2 to the second direction D2.

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 illustrative only, and various equivalent changes and modifications may be made without departing from the spirit of the present invention, and therefore, it is intended to cover in the appended claims all such changes and modifications as fall within the true spirit of the invention.

Claims

1. A kind of sliding rail assembly, include a first rail, a second rail and a first sliding-assistant device, wherein, this second rail can be relative to this first rail displacement, this first sliding-assistant device sets up in this first rail, characterized by that:

the slide rail assembly also comprises a second sliding-assistant device arranged on the first rail, and the second sliding-assistant device comprises a butting part; and

a first working member movably mounted to the first rail to be capable of being in one of a first state and a second state;

When the second rail is in a folding position relative to the first rail, the first sliding assisting device and the second sliding assisting device are respectively used for supporting different parts of the second rail;

when the second rail moves from the folding position to a first direction to an opening preset stroke, the second sliding-assistant device moves to a preset position along with the second rail in the first direction;

when the second sliding-assistant device is at the preset position, the second sliding-assistant device is blocked with the first workpiece in the second state through the abutting part, so as to prevent the second sliding-assistant device from moving from the preset position to a second direction opposite to the first direction;

the slide rail assembly also comprises a third rail and a second workpiece; the first rail is movably arranged between the third rail and the second rail, and the second working piece is movably arranged on the first rail and can be in one of a first preset state and a second preset state; when the second rail moves from the retracted position to the first direction relative to the first rail, the second rail can drive the first rail through the second workpiece in the first predetermined state, so that the second rail and the first rail synchronously move to the first direction relative to the third rail;

The third rail is also provided with a positioning mechanism, and the positioning mechanism comprises a guide feature, a blocking feature and an intermediate feature which are arranged between the guide feature and the blocking feature; when the second rail and the first rail continue to synchronously move towards the first direction relative to the third rail, the second working piece is guided to the middle feature by the guiding feature of the positioning mechanism, so that the second working piece is supported by the middle feature of the positioning mechanism and is switched from the first predetermined state to the second predetermined state, and the second rail and the first rail do not synchronously move towards the first direction relative to the third rail any more.

2. The slide rail assembly of claim 1 wherein when the first rail is displaced relative to the third rail in the first direction to an extended position, and the second operating member in the first predetermined state is capable of latching against a blocking feature of the positioning mechanism to prevent displacement of the first rail relative to the third rail from the extended position to the second direction.

3. The slide assembly of claim 2 wherein when the second rail is displaced from an open position to a stroke in the second direction relative to the first rail, the second rail is capable of pushing against the second working member to transition the second working member from the first predetermined state to the second predetermined state, thereby releasing the second working member from the blocking feature of the positioning mechanism to allow the first rail to be displaced from the extended position to the second direction.

4. The slide rail assembly of claim 3 wherein the first working member has a drive feature; when the second rail continues to move in the second direction, the second rail contacts with the driving feature of the first workpiece in the second state, so that the second rail and the first rail can synchronously move in the second direction relative to the third rail, and the end parts of the second rail and the first rail can maintain a preset distance.

5. The slide rail assembly of claim 4 wherein the third rail is further provided with a release mechanism; when the second rail and the first rail move to a predetermined return stroke in the second direction relative to the third rail, the first working member is driven by the release mechanism to switch the first working member from the second state to the first state, so as to allow the second sliding assistance device to move from the predetermined position to the second direction.

6. The slide rail assembly of claim 1 further comprising a first resilient member for providing a resilient force to the first working member.

7. The slide rail assembly of claim 1 further comprising a second resilient member for providing a resilient force to the second working member.