EP3981291B1

EP3981291B1 - Slide rail assembly and cabinet comprising the same

Info

Publication number: EP3981291B1
Application number: EP20848830.4A
Authority: EP
Inventors: Quanfang HE
Original assignee: Dongguan Dige Hardware Products Co Ltd
Current assignee: Dongguan Dige Hardware Products Co Ltd
Priority date: 2020-08-25
Filing date: 2020-12-09
Publication date: 2023-12-06
Anticipated expiration: 2040-12-09
Also published as: WO2022041560A1; ES2971410T3; CN111870069A; US20220304466A1; EP3981291A4; EP3981291A1

Description

TECHNICAL FIELD

The present invention relates to the field of furniture, and in particular to a slide rail assembly and a cabinet comprising the same.

BACKGROUND

Slide rails, also known as guide rails or slide ways, refer to hardware interconnecting parts that are fixed to a cabinet body of furniture and are used for drawers of the furniture or cabinet boards moving in or out. The slide rails are suitable for connection of wooden and steel drawers and cabinets, furniture, filing cabinets, bathroom cabinets, and the like.
At present, in the installation of a drawer, slide rails are mostly used in order to facilitate sliding of the drawer. With the improvement of people's living standards, more and more items need to be stored, and therefore the storage space of the drawer needs to be increased. The existing drawer usually adopts roller type slide rails, and rollers must have a certain height in order to ensure smoothness of sliding. Because the rollers are located at the bottom of the drawer, the drawer is raised and the installation space for the drawer is reduced, which results in a smaller drawer size that cannot meet higher storage requirements. CN102232735B discloses a synchronizing device for guide rails comprising an upper rail, a middle rail and a lower rail, wherein the synchronizing device comprises a synchronizing wheel which is rotationally arranged through a wheel shaft; the middle rail is fixedly provided with a wheel frame corresponding to the synchronizing wheel; and the two sides of the wheel shaft are connected with the middle rail and the wheel frame respectively. CN210672684U discloses a three-section drawer sliding rail assembly comprising a movable rail, a middle rail and a fixed rail connected with a cabinet body, wherein when the movable rail slides, the middle rail is driven by the gear to slide along the fixed rail. FR2461471A1 discloses a guide device for drawers and others, which comprises a support rail fixed to the body of the furniture, an extraction rail fixed to the drawer and an intermediate rail between the support guide and the extraction rail, and trolleys arranged between these rails. WO2008038472A1 discloses a slide rail unit including a stationary rail, an intermediate rail to be assembled with the stationary rail through a plurality of balls, and a moving rail to be assembled with the intermediate rail through a plurality of balls, wherein in the longitudinal direction, the intermediate rail can slide relative to the stationary rail, and the moving rail can slide relative to the intermediate rail. DE202010007999U1 shows a pull-out guide for drawers or the like, with a carcass rail, with a drawer rail and with a central rail which is guided in two rolling element carriages, the central rail having a toothed wheel and the two rolling element carriages each having a toothed rack meshing with the toothed wheel, wherein the toothed racks each have a toothed rack end section which projects beyond the rolling element carriage and meshes with the toothed wheel when the pull-out guide is fully extended.

SUMMARY

An objective of the present invention is to provide a slide rail assembly that can increase an installation space of a drawer and runs stably, quietly and smoothly.
In order to achieve the aforementioned objective, a slide rail assembly is provided in the present invention, which comprises a top rail, a middle rail and a bottom rail arranged in sequence from top to bottom.
The top rail defines a first cavity and is provided with a first opening communicated with the first cavity, the bottom rail defines a second cavity and is provided with a second opening communicated with the second cavity, and the first opening and the second opening are arranged opposite to each other; the middle rail comprises a first bending portion, a transition portion, and a second bending portion connected in sequence, and the first bending portion is inserted into the first cavity through the first opening, and the second bending portion is inserted into the second cavity through the second opening.
A first bracket is provided between the first bending portion and the top rail to separate the first bending portion and the top rail, and the first bracket is provided with a first hole in which a first rolling element in contact with the first bending portion and the top rail is provided; a second bracket is provided between the second bending portion and the bottom rail to separate the second bending portion and the bottom rail, and the second bracket is provided with a second hole in which a second rolling element in contact with the second bending portion and the bottom rail is provided.
The first bracket is provided with a first serrated edge along a length direction of the first bracket, the second bracket is provided with a second serrated edge along a length direction of the second bracket, a gear is provided between the first serrated edge and the serrated edge and meshes with the first serrated edge and the second serrated edge, and the gear is connected to the transition portion through a rotating shaft.
According to the invention, the first bracket is provided with three first rolling units, each being composed of a plurality of first rolling elements arranged along the length direction of the first bracket; the three first rolling units are arranged in an inverted triangle viewed from a cross-section direction of the first bracket, two first rolling units are arranged above the first bending portion, and another first rolling unit is arranged below the first bending portion.
The second bracket is provided with three second rolling units, each being composed of a plurality of second rolling elements arranged along the length direction of the second bracket; the three first rolling units are arranged in an upright triangle viewed from a cross-section direction of the second bracket, two second rolling units are arranged below the second bending portion, and another second rolling unit is arranged above the second bending portion.
According to the invention, the first bending portion, the transition portion, and the second bending portion together enclose a sliding cavity.
A side of the first bending portion facing away from the sliding cavity is provided with two first guide grooves extending along a length direction of the first bending portion, and the two first guiding grooves are respectively used for accommodating two first rolling elements of the two first rolling units arranged above the first bending portion; a side of the first bending portion facing toward the sliding cavity is provided with one first guide groove extending along the length direction of the first bending portion, and the one first guiding groove is used for accommodating one first rolling element of the another first rolling unit arranged below the first bending portion.
A side of the second bending portion facing away from the sliding cavity is provided with two second guide grooves extending along a length direction of the second bending portion, and the two second guiding grooves are respectively used for accommodating two second rolling elements of the two second rolling units arranged below the second bending portion; a side of the second bending portion facing toward the sliding cavity is provided with one second guide groove extending along the length direction of the second bending portion, and the one second guiding groove is used for accommodating one second rolling element of the another second rolling unit arranged above the second bending portion.
In some embodiments of the present invention, two ends of the first bending portion are respectively provided with a first protrusion and a second protrusion protruding away from the sliding cavity, and the first bracket is defined between the first protrusion and the second protrusion.
In some embodiments of the present invention, two ends of the second bending portion are respectively provided with a third protrusion and a fourth protrusion protruding away from the sliding cavity, and the second bracket is defined between the third protrusion and the fourth protrusion.
According to the invention a rear end of the top rail is provided with a fifth protrusion protruding toward the first cavity, a front end of the top rail is provided with a regulating screw, and the first bracket is defined between the fifth protrusion and the regulating screw.
In some embodiments of the present invention, two ends of the bottom rail are respectively provided with a sixth protrusion and a seventh protrusion protruding toward the second cavity, and the second bracket is defines between the sixth protrusion and the seventh protrusion.
According to the present invention, a front end of the top rail is further provided with a limiting member comprising a clamping portion adapted to the first cavity and a baffle provided at a front end of the clamping portion, and the clamping portion is inserted into the first cavity to realize connection between the limiting member and the top rail.
In some embodiments of the present invention, the bottom rail is provided with a mounting plate disposed vertically, and the mounting plate is provided with a plurality of connecting holes.
Another objective of the present invention is to provide a cabinet which comprises a cabinet body, one or more drawers, and one or more slide rail assemblies described above, the drawers are arranged inside the cabinet body; a bottom rail of the slide rail assembly is fixed to an inner side of the cabinet body, and a top rail of the slide rail assembly is fixed to a bottom surface of the drawer.
The slide rail assembly provided in the present invention has the following advantages compared with the prior art.
The top rail and the middle rail slide relative to each other through a first rolling element, and the middle rail and the bottom rail slide relative to each other through a second rolling element, so that the slide rail assembly can meet the requirements of drawing out and pushing in a drawer. The top rail defines the first cavity, the bottom rail defines the second cavity, the first bending portion of the middle rail is inserted into the first cavity, and the second bending portion of the middle rail is inserted into the second cavity, so that a height of the entire slide rail assembly is reduced, which reduces a space under the drawer occupied by the slide rail assembly, allowing more items stored in the drawer. In addition, the gear is provided between the first serrated edge of the first bracket and the second serrated edge of the second bracket and meshes with the first serrated edge and the second serrated edge, so that the top rail, the middle rail and the bottom rail can be linked, allowing more stable, quieter and smoother running of the slide rail assembly.
In addition, a cabinet is also provided in the present invention, and the cabinet has advantages of large storage capacity, low noise, good quality and the like, due to adopting the aforementioned slide rail assembly.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is an overall schematic view of a slide rail assembly according to an embodiment of the present invention;
FIG. 2 is an explosive schematic view of a slide rail assembly according to an embodiment of the present invention;
FIG. 3 is a schematic view showing an end face of a top rail according to an embodiment of the present invention;
FIG. 4 is a schematic view showing an end face of a bottom rail according to an embodiment of the present invention;
FIG. 5 is a schematic view showing an end face of a middle rail according to an embodiment of the present invention;
FIG. 6 is a schematic view showing an end face of a slide rail assembly according to an embodiment of the present invention;
FIG. 7 is a schematic view showing a first bracket, a second bracket, a first rolling element, a second rolling element, a gear, and a middle rail assembled according to an embodiment of the present invention;
FIG. 8 is a schematic structural diagram of a rear end of a top rail according to an embodiment of the present invention;
FIG. 9 is a schematic structural diagram of a front end of a top rail according to an embodiment of the present invention; and
FIG. 10 is a schematic structural diagram of a bottom rail according to an embodiment of the present invention.

List of reference numerals: 1, top rail; 101, first cavity; 102, first opening; 103, fifth protrusion; 2, middle rail; 201, first bending portion; 2012, first protrusion; 2011, second protrusion; 202, transition portion; 203, second bending portion; 2031, second guide groove; 2032, third protrusion; 2033, fourth protrusion; 204, sliding cavity; 3. bottom rail; 301, second cavity; 302, second opening; 303, sixth protrusion; 304, seventh protrusion; 305, mounting plate; 4, first bracket; 401, first serrated edge; 5, first rolling element; 6, second bracket; 601, second serrated edge; 7, second rolling element; 8, gear; 9, rotating shaft; 10, regulating screw; 11, limiting element; 1101, clamping portion; and 1102, baffle.

DETAILED DESCRIPTION

It should be understood that the terms "first", "second", etc. are used in the present invention to describe various information, but the information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present invention, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information.
In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connecting" should be understood in a broad sense, for example, it may refer to fixed connection, detachable connection, or integral connection; it may also refer to mechanical connection or electrical connection; it may also refer to direct connection or indirect connection through an intermediate medium; and it may refer to internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above-mentioned terms in the present invention can be understood in specific situations. In addition, the orientations such as "top", "bottom", "inside", and "outside" in the present invention are all descriptions based on the orientation of a slide rail assembly installed on a cabinet.
Refer to FIG. 1 to FIG. 7. A slide rail assembly provided according to an embodiment of the present invention comprises a top rail 1, a middle rail 2 and a bottom rail 3 arranged in sequence from top to bottom. The top rail 1 defines a first cavity 101 and is provided with a first opening 102 communicated with the first cavity 101. The bottom rail 3 defines a second cavity 301 and is provided with a second opening 302 communicated with the second cavity 301. The first opening 102 and the second opening 302 are arranged opposite to each other. The middle rail 2 comprises a first bending portion 201, a transition portion 202, and a second bending portion 203 which are connected in sequence and together enclose a sliding cavity. The first bending portion 201 is inserted into the first cavity 101 through the first opening 102, and the second bending portion 203 is inserted into the second cavity 301 through the second opening 302. A first bracket 4 is provided between the first bending portion 201 and the top rail 1 to separate the first bending portion 201 and the top rail 1. The first bracket 4 is provided with a first hole in which a first rolling element 5 in contact with the first bending portion 201 and the top rail 1 is provided. A second bracket 6 is provided between the second bending portion 203 and the bottom rail 3 to separate the second bending portion 203 and the bottom rail 3. The second bracket 6 is provided with a second hole in which a second rolling element 7 in contact with the second bending portion 203 and the bottom rail 3 is provided. The first bracket 4 is provided with a first serrated edge 401 along a length direction of the first bracket 4, the second bracket 6 is provided with a second serrated edge 601 along a length direction of the second bracket 6, a gear 8 is provided between the first serrated edge 401 and the serrated edge 601 and meshes with the first serrated edge 401 and the second serrated edge 601, and the gear 8 is connected to the transition portion 202 through a rotating shaft 9.
With the aforementioned structure, the top rail 1 and the middle rail 2 slide relative to each other through a first rolling element 5, and the middle rail 2 and the bottom rail 3 slide relative to each other through a second rolling element 7, so that the slide rail assembly provided in the present invention can meet the requirements of drawing out and pushing in a drawer. The top rail 1 defines the first cavity 101, the bottom rail 3 defines the second cavity 301, the first bending portion 201 of the middle rail 2 is inserted into the first cavity 101, and the second bending portion 203 of the middle rail 2 is inserted into the second cavity 301, so that a height of the entire slide rail assembly is reduced, which reduces a space under the drawer occupied by the slide rail assembly, allowing more items stored in the drawer. In addition, the gear 8 is provided between the first serrated edge 401 of the first bracket 4 and the second serrated edge 601 of the second bracket 6 and meshes with the first serrated edge 401 and the second serrated edge 601, so that the top rail 1, the middle rail 2 and the bottom rail 3 can be linked, allowing more stable, quieter and smoother running of the slide rail assembly.
According to the invention, refer to FIG. 6, in the embodiment, the first bracket 4 is provided with three first rolling units, each being composed of a plurality of first rolling elements 5 arranged along the length direction of the first bracket 4. The three first rolling units are arranged in an inverted triangle viewed from a cross-section direction of the first bracket, two first rolling units are arranged above the first bending portion 201, and another first rolling unit is arranged below the first bending portion 201. Similarly, the second bracket 6 is provided with three second rolling units, each being composed of a plurality of second rolling elements 7 arranged along the length direction of the second bracket 6. The three first rolling units are arranged in an upright triangle viewed from a cross-sectional direction of the second bracket 6, two second rolling units are arranged below the second bending portion 203, and another second rolling unit is arranged above the second bending portion 203. In this way, the first rolling units and the second rolling units arranged in a triangle can make the slide rail assembly evenly stressed, thereby improving working condition of the slide rail assembly, prolonging service life of the sliding rail assembly, and increasing stability of the slide rail assembly during operation.
According to the invention, refer to FIGS. 5 and 6, in the embodiment, in order to increase stability of the slide rail assembly during operation, a side of the first bending portion 201 facing away from the sliding cavity 204 is provided with two first guide grooves extending along a length direction of the first bending portion 201, and the two first guiding grooves are respectively used for accommodating two first rolling elements 5 of the two first rolling units arranged above the first bending portion 201; and a side of the first bending portion 201 facing toward the sliding cavity 204 is provided with one first guide groove extending along the length direction of the first bending portion 201, and the one first guiding groove is used for accommodating one first rolling element 5 of the another first rolling unit arranged below the first bending portion 201. In addition, a side of the second bending portion 203 facing away from the sliding cavity 204 is provided with two second guide grooves extending along a length direction of the second bending portion 203, and the two second guiding grooves are respectively used for accommodating two second rolling elements 7 of the two second rolling units arranged below the second bending portion 203; and a side of the second bending portion 203 facing toward the sliding cavity 204 is provided with one second guide groove extending along the length direction of the second bending portion 203, and the one second guiding groove is used for accommodating one second rolling element 7 of the another second rolling unit arranged above the second bending portion 203.
Optionally, in this embodiment, the first rolling elements 5 and the second rolling elements 7 are preferably steel balls with good rolling property and high bearing capacity. Of course, in other embodiments, the steel balls can be replaced by cylindrical steel columns or other rolling parts.
Optionally, refer to FIG. 7, in the embodiment, two ends of the first bending portion 201 are respectively provided with a first protrusion 2012 and a second protrusion 2011 protruding away from the sliding cavity 204, and the first bracket 4 is defined between the first protrusion 2012 and the second protrusion 2011. Two ends of the second bending portion 203 are respectively provided with a third protrusion 2032 and a fourth protrusion 2033 protruding away from the sliding cavity 204, and the second bracket 6 is defined between the third protrusion 2032 and the fourth protrusion 2033. In this way, the first bracket 4 and the second bracket 6 will not fall off the middle rail 2, which improves the reliability of the slide rail assembly.
According to the invention, refer to FIGS. 8 and 10, in the embodiment, a rear end of the top rail 1 is provided with a fifth protrusion 103 protruding toward the first cavity 101, a front end of the top rail 1 is provided with a regulating screw 10 that can move up and down, and the first bracket is defined between the fifth protrusion 103 and the regulating screw 10. Two ends of the bottom rail 3 are respectively provided with a sixth protrusion 303 and a seventh protrusion 304 protruding toward the second cavity 301, and the second bracket is defined between the sixth protrusion 303 and the seventh protrusion 304. In this way, the first bracket 4 will not fall off the first cavity 101 and the second bracket 6 will not fall off the second cavity 301, which further improves the reliability of the slide rail assembly. In addition, the regulating screw 10 is used for regulating the mounting height of the drawer.
According to the invention, refer to FIG. 9, in the embodiment, a front end of the top rail 1 is further provided with a limiting member 11 comprising a clamping portion 1101 adapted to the first cavity 101 and a baffle 1102 provided at a front end of the clamping portion 1101. The clamping portion 1101 is inserted into the first cavity 101 to realize connection between the limiting member 11 and the top rail 1. Based on this, the baffle 1102 can be butted with a front end of the bottom rail 3 when the front end of the top rail 1 is flush with the front end of the bottom rail 3, so as to prevent the top rail 1 from sliding backward and causing derailment, thereby further improving the reliability of the slide rail assembly. In addition, the limiting member 11 can also prevent foreign substances such as dust and debris from entering the first cavity 101 and from affecting sliding of the slide rail assembly. In addition, such slide rail assembly has more beautiful appearance.
Optionally, refer to FIGS. 4 and 10, in the embodiment, the bottom rail 3 is provided with a mounting plate 305 disposed vertically. The mounting plate 305 is connected to a cabinet body so as to fix the bottom rail 3. The mounting plate 305 is provided with a plurality of connecting holes for passing a plurality of fastening screws through.
To sum up, a slide rail assembly is provided according to an embodiment of the present invention, which comprising a top rail, a middle rail and a bottom rail arranged in sequence from top to bottom. The slide rail assembly has the following advantages compared with the prior art.

1. The slide rail assembly has a lower height which reduces occupation of the space under the drawer and increases the installation space of the drawer, so that the size of the drawer can be larger, and more items can be stored, meeting higher storage requirements;
2. The top rail 1, the middle rail 2 and the bottom rail 3 can be linked, which makes the operation of the slide rail assembly more stable, quieter and smoother; and
3. The slide rail assembly is stressed evenly, which extends service life of the slide rail assembly and provide better stability and higher reliability during operation.

The above are only the preferred embodiments of the present invention. It should be pointed out that for those of ordinary skill in the art, several improvements and substitutions can be made without departing from the technical principle of the present invention, which improvements and substitutions should also fall within the protection scope of the present invention as defined by the appended claims.

Claims

A slide rail assembly, wherein the slide rail assembly comprises a top rail (1), a middle rail (2) and a bottom rail (3) arranged in sequence from top to bottom;
the top rail (1) defines a first cavity (101) and is provided with a first opening (102) communicated with the first cavity (101), the bottom rail (3) defines a second cavity (301) and is provided with a second opening (302) communicated with the second cavity (301), and the first opening (102) and the second opening (302) are arranged opposite to each other; the middle rail (2) comprises a first bending portion (201), a transition portion (202), and a second bending portion (203) connected in sequence, and the first bending portion (201) is inserted into the first cavity (101) through the first opening (102), and the second bending portion (203) is inserted into the second cavity (301) through the second opening (302);

a first bracket (4) is provided between the first bending portion (201) and the top rail (1) to separate the first bending portion (201) and the top rail (1), and the first bracket (4) is provided with a first hole in which a first rolling element (5) in contact with the first bending portion (201) and the top rail (1) is provided; a second bracket (6) is provided between the second bending portion (203) and the bottom rail (3) to separate the second bending portion (203) and the bottom rail (3), and the second bracket (6) is provided with a second hole in which a second rolling element (7) in contact with the second bending portion (203) and the bottom rail (3) is provided; and

the first bracket (4) is provided with a first serrated edge (401) along a length direction of the first bracket (4), the second bracket (6) is provided with a second serrated edge (601) along a length direction of the second bracket (6), a gear (8) is provided between the first serrated edge (401) and the second serrated edge (601) and meshes with the first serrated edge (401) and the second serrated edge (601), and the gear (8) is connected to the transition portion (202) through a rotating shaft (9),

wherein

a front end of the top rail (1) is further provided with a limiting member (11) comprising a clamping portion (1101) adapted to the first cavity (101) and a baffle (1102) provided at a front end of the clamping portion (1101), and the clamping portion (1101) is inserted into the first cavity (101) to realize connection between the limiting member (11) and the top rail (1); the first bracket (4) is provided with three first rolling units, each being composed of a plurality of first rolling elements (5) arranged along the length direction of the first bracket (4); the three first rolling units are arranged in an inverted triangle viewed from a cross-section direction of the first bracket (4), two first rolling units are arranged above the first bending portion (201), and another first rolling unit is arranged below the first bending portion (201);

the second bracket (6) is provided with three second rolling units, each being composed of a plurality of second rolling elements arranged along the length direction of the second bracket (6); the three first rolling units are arranged in an upright triangle viewed from a cross-section direction of the second bracket (6), two second rolling units are arranged below the second bending portion (203), and another second rolling unit is arranged above the second bending portion (203); the first bending portion (201), the transition portion (202), and the second bending portion (203) together enclose a sliding cavity (204);

a side of the first bending portion (201) facing away from the sliding cavity (204) is provided with two first guide grooves (2011) extending along a length direction of the first bending portion (204), and the two first guiding grooves (2011) are respectively used for accommodating two first rolling elements (5) of the two first rolling units arranged above the first bending portion (201); a side of the first bending portion (201) facing toward the sliding cavity (204) is provided with one first guide groove (2011) extending along the length direction of the first bending portion (201), and the one first guiding groove (2011) is used for accommodating one first rolling element (5) of the another first rolling unit arranged below the first bending portion (201);

a side of the second bending portion (203) facing away from the sliding cavity (204) is provided with two second guide grooves (2031) extending along a length direction of the second bending portion (203), and the two second guiding grooves (2031) are respectively used for accommodating two second rolling elements (7) of the two second rolling units arranged below the second bending portion (203); a side of the second bending portion (203) facing toward the sliding cavity (204) is provided with one second guide groove (2031) extending along the length direction of the second bending portion (203), and the one second guiding groove (2031) is used for accommodating one second rolling element (7) of the another second rolling unit arranged above the second bending portion (203); and

a rear end of the top rail (1) is provided with a fifth protrusion (103) protruding toward the first cavity (101), characterized in that a front end of the top rail (1) is provided with a regulating screw (10), and the first bracket (4) is defined between the fifth protrusion (103) and the regulating screw (10).
The slide rail assembly of claim 1, characterized in that two ends of the first bending portion (203) are respectively provided with a first protrusion (2012) and a second protrusion (2011) protruding away from the sliding cavity (204), and the first bracket (4) is defined between the first protrusion (2012) and the second protrusion (2011).
The slide rail assembly of claim 1, characterized in that two ends of the second bending portion (203) are respectively provided with a third protrusion (2032) and a fourth protrusion (2033) protruding away from the sliding cavity (204), and the second bracket (6) is defined between the third protrusion (2032) and the fourth protrusion (2033).
The slide rail assembly of claim 1, characterized in that two ends of the bottom rail (3) are respectively provided with a sixth protrusion (303) and a seventh protrusion (304) protruding toward the second cavity (301), and the second bracket (6) is defines between the sixth protrusion (303) and the seventh protrusion (304).
The slide rail assembly of claim 1, characterized in that the bottom rail (3) is provided with a mounting plate (305) disposed vertically, and the mounting plate (305) is provided with a plurality of connecting holes.
A cabinet, characterized in that the cabinet comprises a cabinet body, one or more drawers, and one or more slide rail assemblies of any one of claims 1 to 5, the drawers are arranged inside the cabinet body; a bottom rail (3) of the slide rail assembly is fixed to an inner side of the cabinet body, and a top rail (1) of the slide rail assembly is fixed to a bottom surface of the drawer.