Slide rail assembly with extended stroke

Abstract

The utility model discloses a slide rail assembly with extended stroke, a middle rail is provided with a stroke extension assembly, the stroke extension assembly comprises a plurality of transmission gears which are sequentially meshed with one another, the transmission gears are rotatably arranged on the middle rail, and the plurality of transmission gears are arranged along the sliding direction of the middle rail. The transmission gear is meshed with the first rack and the second rack. According to the stroke extending assembly, when the drawer is completely opened, the head end of the first rack is meshed with the transmission gear located on the rearmost side, the second rack is meshed with the transmission gear located on the foremost side, an extending area is formed between the head end of the bottom rail and the tail end of the upper rail in the state, and the bottom rail and the upper rail are not overlapped in the extending area. Compared with an overlapping area of an existing single gear, the outward moving stroke of the upper rail can be increased, so that the openable stroke of the drawer can be lengthened as much as possible in a cabinet with the same installation depth, the drawer can be completely drawn out, and articles in the drawer can be conveniently placed or taken out.

Description

Technical Field

[0001] The utility model relates to a slide rail assembly with extended stroke. Background Art

[0002] Prior art, such as Chinese utility model patent document with publication number CN212868336U, discloses a gear rack synchronous motion slide rail, wherein the slide rail comprises an upper rail, a middle rail and a lower rail; the upper rail can slide relative to the middle rail; the middle rail can slide relative to the lower rail; a transmission rack is fixed on the slide rail; the transmission rack comprises an upper transmission rack and a lower transmission rack; the upper transmission rack is fixed to the upper rail by a fixing device; the lower transmission rack is fixed to the lower rail by a fixing device; a rotatable gear is fixed on the middle rail; the upper transmission rack is meshed with the gear; the lower transmission rack is meshed with the gear.

[0003] See also Figure 7 The existing synchronous slide rail adopts a method of setting racks on the bottom rail 10 and the upper rail 30 respectively, and setting a gear on the middle rail 20. The meshing of the gear and the rack can make the middle rail 20 and the upper rail 30 synchronized when moving. The problem with the existing method of using a single gear to mesh with two racks for synchronous transmission is that when the upper rail 30 moves outward to the maximum stroke, there is an overlapping area between the tail end of the upper rail and the head end of the bottom rail, such as Figure 7 As shown in B in the middle. This overlapping area constrains the outward opening stroke of the drawer. The reason for this problem is that a single gear setting must always require two racks to mesh with this gear to keep the slide rail moving outward or inward in sync, and the two racks meshing with the rack affect the outward movement stroke of the slide rail. The existing way to solve the stroke problem is to lengthen the length of the middle rail, the upper rail and the rack. However, blindly increasing the length will face installation problems. Since the depth of the cabinet is limited, when the length of the slide rail when closed is greater than the depth of the cabinet, it will face the problem of being unable to install. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a slide rail assembly that can solve the problem of overlapping area between the tail end of the upper rail and the head end of the bottom rail and extend the opening stroke.

[0005] A stroke-extended slide rail assembly designed for this purpose comprises a bottom rail, a middle rail and an upper rail, wherein the middle rail is slidably arranged relative to the bottom rail, and the upper rail is slidably arranged relative to the middle rail, a first rack is arranged on the bottom rail, a second rack is arranged on the upper rail, and a stroke-extending assembly is arranged on the middle rail, wherein the stroke-extending assembly comprises a plurality of transmission gears meshing with each other in sequence, the transmission gears are rotatably arranged on the middle rail, a plurality of transmission gears are arranged in an array along the sliding direction of the middle rail, and the transmission gears are respectively meshed with the first rack and the second rack.

[0006] Preferably, the stroke extension assembly further comprises a gear bracket, wherein the gear bracket is mounted on the middle rail, a mounting shaft is disposed on the gear bracket, and the transmission gear is rotatably disposed on the mounting shaft.

[0007] Preferably, a positioning hole corresponding to the mounting shaft is provided on the middle rail, and the mounting shaft is inserted into the positioning hole.

[0008] Preferably, the gear bracket is fixedly mounted on the middle rail by ultrasonic welding.

[0009] Compared with the prior art, the utility model is provided with a stroke extension component on the middle rail, and the stroke extension component includes a plurality of transmission gears meshing with each other in sequence, the transmission gears are rotatably arranged on the middle rail, and the plurality of transmission gears are arranged along the sliding direction of the middle rail, and the transmission gears are respectively meshed with the first rack and the second rack. The stroke extension component can realize that when the drawer is fully opened, the head end of the first rack meshes with the transmission gear located at the rear side, and the second rack meshes with the transmission gear at the front side, in which state, an extension area is formed between the head end of the bottom rail and the tail end of the upper rail, and the bottom rail and the upper rail do not overlap each other in the extension area. Compared with the existing single gear with overlapping area, the outward movement stroke of the upper rail can be increased to realize the maximum possible lengthening of the drawer opening stroke in the cabinet with the same installation depth, so that the drawer can be fully pulled out, which is convenient for placing or taking out the items in the drawer. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is one of the three-dimensional structural schematic diagrams of the slide rail;

[0011] Figure 2 The second schematic diagram of the three-dimensional structure of the slide rail;

[0012] Figure 3 It is a schematic diagram of the exploded structure of the middle rail and the stroke extension assembly;

[0013] Figure 4 It is a schematic diagram of the planar structure of the slide rail;

[0014] Figure 5 This is a comparison diagram of the opening of a single gear slide and an extended stroke slide;

[0015] Figure 6 This is a comparison diagram of the closing of a single gear slide and an extended stroke slide;

[0016] Figure 7 It is a structural schematic diagram of an existing single gear slide rail. DETAILED DESCRIPTION

[0017] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0018] See also Figure 1-Figure 6 A stroke-extended slide rail assembly comprises a bottom rail 10, a middle rail 20 and an upper rail 30, wherein the middle rail 20 is slidably arranged relative to the bottom rail 10, and the upper rail 30 is slidably arranged relative to the middle rail 20, a first rack 110 is arranged on the bottom rail 10, a second rack 310 is arranged on the upper rail 30, and a stroke-extending assembly 40 is arranged on the middle rail 20, wherein the stroke-extending assembly 40 comprises a plurality of transmission gears 420 meshing with each other in sequence, the transmission gears 420 are rotatably arranged on the middle rail 20, and a plurality of transmission gears 420 are arranged in an array along the sliding direction of the middle rail 20, and the transmission gears 420 are respectively meshed with the first rack 110 and the second rack 310.

[0019] The stroke extension component can achieve that when the drawer is fully opened, the head end of the first rack is meshed with the transmission gear at the rear side, and the second rack is meshed with the transmission gear at the front side. In this state, an extension area is formed between the head end of the bottom rail and the tail end of the upper rail, such as Figure 4 As shown in A, the bottom rail and the upper rail do not overlap each other in the extended area. Compared with the existing single gear with overlapping areas, the outward movement stroke of the upper rail can be increased to achieve the maximum possible lengthening of the drawer opening stroke in the cabinet with the same installation depth, so that the drawer can be fully pulled out, which is convenient for placing or taking out items from the drawer.

[0020] See also Figure 3 The stroke extension assembly 40 further includes a gear bracket 410 , which is mounted on the middle rail 20 . A mounting shaft 411 is disposed on the gear bracket 410 , and the transmission gear 420 is rotatably disposed on the mounting shaft 411 .

[0021] See also Figure 3 The middle rail 20 is provided with a positioning hole 210 corresponding to the installation shaft 411 , and the installation shaft 411 is inserted into the positioning hole 210 .

[0022] In the present invention, the gear bracket 410 is fixedly mounted on the middle rail 20 by ultrasonic welding.

[0023] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. The technicians in this industry should understand that the utility model is not limited by the above embodiments. The above embodiments and the description are only to illustrate the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model will have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A slide rail assembly with an extended stroke, comprising a bottom rail (10), a middle rail (20) and an upper rail (30), wherein the middle rail (20) is slidably arranged relative to the bottom rail (10), and the upper rail (30) is slidably arranged relative to the middle rail (20), the bottom rail (10) is provided with a first rack (110), and the upper rail (30) is provided with a second rack (310), characterized in that: A stroke extension assembly (40) is arranged on the middle rail (20), and the stroke extension assembly (40) includes a plurality of transmission gears (420) meshing with each other in sequence. The transmission gears (420) are rotatably arranged on the middle rail (20), and the plurality of transmission gears (420) are arranged in an array along the sliding direction of the middle rail (20), and the transmission gears (420) are respectively meshed with the first rack (110) and the second rack (310).

2. The slide rail assembly with extended stroke according to claim 1, characterized in that: The stroke extension assembly (40) further comprises a gear bracket (410), wherein the gear bracket (410) is mounted on the middle rail (20), a mounting shaft (411) is arranged on the gear bracket (410), and the transmission gear (420) is rotatably arranged on the mounting shaft (411).

3. The slide rail assembly with extended stroke according to claim 2, characterized in that: The middle rail (20) is provided with a positioning hole (210) corresponding to the installation shaft (411), and the installation shaft (411) is inserted into the positioning hole (210).

4. A slide rail assembly with extended stroke according to claim 2 or 3, characterized in that: The gear bracket (410) is fixedly mounted on the middle rail (20) by ultrasonic welding.

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