US20140097732A1

US20140097732A1 - Sliding rail assembly

Info

Publication number: US20140097732A1
Application number: US14/036,782
Authority: US
Inventors: Yousong Xiao
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-01-13
Filing date: 2013-09-25
Publication date: 2014-04-10
Also published as: WO2012094812A1; CN203723703U

Abstract

A sliding rail assembly includes an outer rail, a middle rail, and an inner rail that are matched with one another, and a self-locking device matched with the inner rail. The self-locking device includes a fixed block and a sliding block moving with respect to the fixed block, a sliding slot provided for the sliding block to slide is disposed on the fixed block, and a sliding block limiting slot is disposed on the sliding block. A spring extends in the sliding slot, and has one end connected to the bottom of the sliding block, and the other end fastened to the fixed block. A clamping portion and a limiting slot are disposed on the fixed block to match with a sliding block clamping portion- and a sliding block limiting portion disposed on the sliding block.

Description

BACKGROUND OF THE INVENTION

1. Field of Invention
The present invention relates to a sliding rail assembly, and more particularly to a sliding rail assembly provided with a self-locking device.
2. Related Art
A sliding rail is a device for implementing relative moving of two adjacent objects, such as a drawer and a keyboard drawer. Generally speaking, sliding rail assemblies use balls to reduce friction, so as to implement smooth opening and closing; however, in a certain situation, when an object is moved or is affected by an external force, the object connected to the sliding rail cannot effectively maintain closed state, and is easily slide to fall or shake, causing potential safety risk. Therefore, a sliding rail device having a self-locking function is proposed, for example, a sliding rail device having a self-locking function disclosed in China patent No. 200820188869.3, in which an inner slot is disposed on an inner rail, a fixed plate is disposed in the inner slot, a groove is disposed on the fixed plate, a hooking block is slidably disposed on the groove, the hooking block is connected to the fixed plate through a spring, a boss is disposed on the hooking block, a fastening hole matched with the boss is disposed on the fixed plate, a pipe step matched with the boss is also disposed in the groove simultaneously, and a pipe notch is disposed on a hooking plate. When the boss enters into the boss fastening hole and is clamped by the boss fastening hole pipe, the rail assembly is locked and cannot slide freely, so that the sliding rail assembly in closed state and the object connected thereto can be fixed. However, the disposed boss fastening hole has limited elasticity, and is easily deformed after being repeatedly used, so that the self-locking state is unreliable, thereby affecting the use of the whole object. At the same time, an error easily occurs in matched positioning between the boss and the boss fastening hole during use, which also affects opening and closing of the object.

SUMMARY OF THE INVENTION

The present invention is directed to overcome the defects of the prior art and provide a sliding rail assembly that is stable and can be used repeatedly and reliably for a long time.
In order to implement the above objective, the present invention adopts the following technical solution.
The sliding rail assembly includes an outer rail, a middle rail, and an inner rail that are matched with one another, and a self-locking device mounted in a matched manner, and is characterized in that: the self-locking device includes a fixed block and a sliding block moving relative to the fixed block, the fixed block is fixed through clamping by mounting limiting blocks at two symmetric portions, at the same time, a sliding slot provided for the sliding block to slide is disposed on the fixed block, and a sliding block limiting slot is disposed on the sliding block. A spring extends in the sliding slot, and has one end connected to the bottom of the sliding block, and the other end fastened to the fixed block. A clamping portion and a limiting slot are disposed on the fixed block, so as to match with a sliding block clamping portion and a sliding block limiting portion disposed on the sliding block. A buffer is further disposed at the front end of the fixed block.
The clamping portion on the fixed block includes a first clamping portion and a second clamping portion, the first clamping portion and the second clamping portion are protruded on the surface of the fixed block, and has a distance there-between slightly greater than the width of the sliding block clamping portion; a clamping block matched with the sliding block is disposed on the inner rail, and the clamping block is fixed to the inner rail through a clamping block riveting hole.
The fixed block is fixed to a mounting groove through clamping by mounting limiting blocks at two symmetric portions.
A sliding guide slot provided with a slope is disposed between the limiting slot of the fixed block and the first clamping portion.
The outer rail and middle rail, and the middle rail and inner rail are respectively connected in a sliding manner through balls disposed in an outer ball slot and an inner ball slot.
Two springs are disposed in parallel.
By means of the technical solution, the present invention has the following beneficial effects:

- the self-locking member may be used repeatedly without deformation and reliably, and can be locked firmly; when being moved or being affected by an external force, an object using the sliding rail can remain stable, safe and reliable.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a three-dimensional schematic view of a sliding rail assembly according to the present invention;

FIG. 1 A is a portion enlarged drawing form FIG. 1.

FIG. 2 is a three-dimensional schematic view of a self-locking device of a sliding rail assembly according to the present invention;

FIG. 3 is a schematic view of a self-locking device of a sliding rail assembly in closed state according to the present invention; and

FIG. 4 is a schematic view of a self-locking device of a sliding rail assembly in opening state according to the present invention.

DETAILED DESCRIPTION OF THE INVENTION

The present invention is further illustrated through accompanying drawings.
As shown in FIG. 1 to FIG. 3, a sliding rail assembly according to the present invention includes an outer rail 10, a middle rail 20, and an inner rail 30 that are matched with one another, and a self-locking device matched with the inner rail. The self-locking device includes a fixed block 40 and a sliding block 50 moving relative to the fixed block, the fixed block is fixed through clamping by mounting limiting blocks 42 at two symmetric portions, at the same time, a sliding slot 47 provided for the sliding block to slide is disposed on the fixed block, and a slide limiting slot 51 is disposed on the sliding block. Springs 48 extend in the sliding slot, and each have one end connected to the bottom of the sliding block, and the other end fastened to the fixed block; the two springs are disposed in parallel, and are fixed in a fixed seat through engaging with a spring engagement slot 49. A clamping portion and a limiting slot 43 are disposed on the fixed block, so as to match with a sliding block clamping portion 52 and a sliding block limiting portion 53 disposed on the sliding block. A buffer 41 is further disposed at the front end of the fixed block. After the sliding rail is assembled, the buffer ensures that the fixed block and the sliding block are not damaged when a middle rail of an object is pushed back, thereby having a shock absorption and buffer effect. Specifically, the clamping portion on the fixed block includes a first clamping portion 44 and a second clamping portion 46, the first clamping portion and the second clamping portion are protruded on the surface of the fixed block, and has a distance there-between slightly greater than the width of the sliding block clamping portion 52; a sliding guide slot 45 provided with a slope is disposed between the limiting slot of the fixed block and the first clamping portion; in addition, a clamping block 32 matched with the sliding block is disposed on the inner rail 30, and the clamping block is fixed to the inner rail through a clamping block riveting hole 31; the outer rail and middle rail, and the middle rail and inner rail are respectively connected in a sliding manner through balls disposed in an outer ball slot 11 and an inner ball slot 21.
During use, the fixed seat of the self-locking device is riveted to the outer rail through the clamping block 32 with rivets. When a drawer is pulled, the sliding rail is pulled out, that is to say, the inner rail assembly is pulled to move, and at this time, the clamping block 32 on the inner rail assembly is engaged in an engagement slot of the sliding block 50, the sliding block 50 moves along the sliding slot 46 under the pulling force, and when the spring is at the maximum displacement, the sliding block limiting portion 53 on the sliding block presses against the limiting slot on the fixed seat, and at the same time, the sliding block clamping portion 52 is located between the first clamping portion 44 and the second clamping portion 46 of the fixed seat, the sliding block 50 is locked at the position through fixed engagement; at the same time, the clamping block 32 on the inner rail leaves the sliding block engagement slot, and then the inner rail slides freely until the drawer is pulled to the maximum extending length of the sliding rail. When the drawing is closed, that is, the inner rail assembly moves backwards slowly, the clamping block 32 on the inner rail assembly is first engaged with the clamping block engagement slot on the sliding block 50, and the sliding block 50 is pushed out of the locking point under a small pushing force. At the same time, the clamping block 32 on the inner rail assembly is affected by the pulling force of the spring, so that the sliding block 50 springs back together with the inner rail of the sliding rail, thereby achieving the function of automatic locking. When the drawing is pulled open, the sliding block 50 is impacted, and the sliding block 50 may actively jump from the clamping portion of the fixed seat, so that the sliding block automatically springs back under the pulling force of the spring, and the self-locking device fails. At this time, the inner rail assembly can still be pushed to slide, and when the clamping block 32 is pushed to the stop position, that is, the self-locking closed state, of the sliding block 50, and the clamping block 32 is forcedly pushed to the engagement slot of the sliding block 50, the clamping block is engaged, and the self-locking device restores the normal function. Because the sliding block 50 and the clamping block 32 both have a certain slope at the front end thereof, the sliding block 50 and the clamping block 32 are protected from being damaged when the clamping block 32 is forcedly pushed back.
Compared with the prior art, the movement of the sliding block 50 is limited by both the sliding slot 47 of the fixed seat and the slide limiting slot 51 on the sliding block, the matching with the fixed seat is stable and cannot be easily deformed, and can be locked firmly; when being moved or being affected by an external force, the object using the sliding rail can remain stable, safe and reliable.

Claims

What is claimed is:

1. A sliding rail assembly, comprising an outer rail, a middle rail, and an inner rail that are matched with one another, and a self-locking device matched with the inner rail, wherein: the self-locking device comprises a fixed block and a sliding block moving relative to the fixed block, a sliding slot provided for the sliding block to slide is disposed on the fixed block, and a sliding block limiting slot is disposed on the sliding block; a spring extends in the sliding slot, and has one end connected to the bottom of the sliding block and the other end fastened on the fixed block; a clamping portion and a limiting slot are disposed on the fixed block, so as to match with a sliding block clamping portion and a sliding block limiting portion disposed on the sliding block; and a buffer is further disposed at the front end of the fixed block.

2. The sliding rail assembly according to claim 1, wherein the clamping portion on the fixed block comprises a first clamping portion and a second clamping portion, the first clamping portion and the second clamping portion are protruded on the surface of the fixed block, and has a distance there-between slightly greater than the width of the sliding block clamping portion 52.

3. The sliding rail assembly according to claim 1, wherein the fixed block is fixed to a mounting groove through clamping by mounting limiting blocks at two symmetric portions.

4. The sliding rail assembly according to claim 1, wherein a clamping block matched with the sliding block is disposed on the inner rail, and the clamping block is fixed to the inner rail through a clamping block riveting hole.

5. The sliding rail assembly according to claim 1, wherein the spring is fixed in a fixed seat through engaging with a spring engagement slot.

6. The sliding rail assembly according to claim 1, wherein a sliding guide slot provided

slot provided with a slope is disposed between the limiting slot of the fixed block and the first clamping portion.

7. The sliding rail assembly according to claim 1, wherein the outer rail and middle rail, and the middle rail and inner rail are respectively connected in a sliding manner through balls disposed in an outer ball slot and an inner ball slot.

8. The sliding rail assembly according to claim 1, wherein two springs are disposed in parallel.