U.S. patent application number 14/036782 was filed with the patent office on 2014-04-10 for sliding rail assembly.
The applicant listed for this patent is Yousong XIAO. Invention is credited to Yousong XIAO.
Application Number | 20140097732 14/036782 |
Document ID | / |
Family ID | 46506755 |
Filed Date | 2014-04-10 |
United States Patent
Application |
20140097732 |
Kind Code |
A1 |
XIAO; Yousong |
April 10, 2014 |
SLIDING RAIL ASSEMBLY
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.
Inventors: |
XIAO; Yousong; (Shenzhen,
CN) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
XIAO; Yousong |
Shenzhen |
|
CN |
|
|
Family ID: |
46506755 |
Appl. No.: |
14/036782 |
Filed: |
September 25, 2013 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
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PCT/CN2011/070216 |
Jan 13, 2011 |
|
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14036782 |
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Current U.S.
Class: |
312/319.1 |
Current CPC
Class: |
A47B 88/467 20170101;
A47B 88/493 20170101 |
Class at
Publication: |
312/319.1 |
International
Class: |
A47B 88/04 20060101
A47B088/04 |
Claims
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.
Description
BACKGROUND OF THE INVENTION
[0001] 1. Field of Invention
[0002] The present invention relates to a sliding rail assembly,
and more particularly to a sliding rail assembly provided with a
self-locking device.
[0003] 2. Related Art
[0004] 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
[0005] 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.
[0006] In order to implement the above objective, the present
invention adopts the following technical solution.
[0007] 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.
[0008] 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.
[0009] The fixed block is fixed to a mounting groove through
clamping by mounting limiting blocks at two symmetric portions.
[0010] A sliding guide slot provided with a slope is disposed
between the limiting slot of the fixed block and the first clamping
portion.
[0011] 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.
[0012] Two springs are disposed in parallel.
[0013] By means of the technical solution, the present invention
has the following beneficial effects: [0014] 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
[0015] FIG. 1 is a three-dimensional schematic view of a sliding
rail assembly according to the present invention;
[0016] FIG. 1 A is a portion enlarged drawing form FIG. 1.
[0017] FIG. 2 is a three-dimensional schematic view of a
self-locking device of a sliding rail assembly according to the
present invention;
[0018] 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
[0019] 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
[0020] The present invention is further illustrated through
accompanying drawings.
[0021] 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.
[0022] 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.
[0023] 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.
* * * * *