WO2019139290A1

WO2019139290A1 - Sliding device for drawer

Info

Publication number: WO2019139290A1
Application number: PCT/KR2018/016806
Authority: WO
Inventors: 이두면; 김기광
Original assignee: (주)세고스
Priority date: 2018-01-10
Filing date: 2018-12-28
Publication date: 2019-07-18
Also published as: US20210068540A1; EP3738470A1; CN213664408U; KR20190085332A; EP3738470A4

Abstract

The present invention relates to a sliding device for a drawer, which mixes and uses a plurality of sliding balls having different tensile strengths, thereby reducing noise when being operated and reinforcing the rigidity thereof. The sliding device for a drawer comprises: a fixed rail fixedly coupled to a main body; a movable rail fixedly coupled to a storage body and slidably movable on the fixed rail; an intermediate rail disposed between the fixed rail and the movable rail so as to guide the sliding movement of the movable rail; and ball assemblies which slidably move by being disposed between the intermediate rail and the fixed rail and between the intermediate rail and the movable rail, and which have a plurality of sliding balls having different tensile strengths, wherein the ball assemblies have sliding balls having a higher tensile strength disposed on the outermost side thereof. Due to said configuration, it is possible to obtain the effects of reducing noise by generally using sliding balls having a lower tensile strength, and reinforcing rigidity by using sliding balls having a higher tensile strength at a region to which an impact load is applied.

Description

Slide device for drawers

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slide apparatus for a drawer, and more particularly, to a slide apparatus for a drawer which can mix a plurality of slide balls having different tensile strengths to reduce rigidity while reducing noise during operation.

Generally, a sliding device for a drawer is provided between a main body and a main body, and is used such that when the user opens and closes the main body, the main body is easily drawn out or pulled out from the main body.

Such a sliding device for a drawer is provided with a two-stage folding type and a three-fold folding type. Here, in the three-stage folding type, the fixed rail is fastened to the inner surface of the main body, and the movable rail is fastened to the outer surface of the housing. A middle rail is provided between the fixed rail and the moving rail, and a plurality of slide balls are disposed between the middle rail and the fixed rail and between the middle rail and the moving rail to perform rolling motion. With this configuration, the intermediate rail and the movable rail are supported by the fixed rail and are slidably moved together with the accommodating body.

In the conventional sliding device for a drawer, the slide ball is made of the same material and used. For example, the slide ball is made of a metal material or a plastic material.

However, when the slide ball is made of a metal material, there is a problem that a large noise is generated when the storage body is moved, causing discomfort to the user, and when the slide ball is made of a plastic material, the slide ball is easily broken.

Disclosure of the Invention The present invention has been made to solve the above problems, and it is an object of the present invention to provide a slide device for a drawer which can reinforce rigidity while mixing a plurality of slide balls having different tensile strengths, There is a purpose.

According to an aspect of the present invention, there is provided a slide device for a drawer, including: a stationary rail fastened to a main body; A movable rail fastened to the housing and slidably moved on the fixed rail; A middle rail disposed between the fixed rail and the movable rail and guiding the sliding movement of the movable rail; And a plurality of slide balls disposed between the intermediate rail and the fixed rail and between the intermediate rail and the moving rail and slidably moving and having different tensile strengths, wherein the slide ball having a large tensile strength is disposed on the outermost side And a ball assembly.

Wherein the intermediate rail includes: a plate portion disposed between the fixed rail and the movable rail; And a contact portion provided on both sides along the longitudinal direction of the plate portion and having a rolling surface in which the slide ball of the ball assembly is partially received, wherein the rolling surface is provided on one side and the other side of the plate portion, And may be formed in a plurality of spaced apart directions.

The ball assembly includes: a retainer having a plurality of through holes formed at both ends and corners at regular intervals in the longitudinal direction; A first slide ball inserted into a first through hole formed at one end of the retainer and disposed on a first rolling surface curved at one side edge of the contact portion; A second slide ball inserted into a second through hole formed in an edge of the retainer and disposed on a second rolling surface curved at the other edge of the contact portion; And a third slide ball inserted into a third through hole formed at the other end of the retainer and disposed on a third rolling surface curved on the lower side of the second rolling surface.

Here, the first through-hole and the third through-hole may be provided on the same line, and the second through-hole may be provided between the first through-hole and the third through-hole.

The first rolling surface, the second rolling surface, and the third rolling surface are curved to have the same diameter, and the first slide ball, the second slide ball, and the third slide ball are formed to have the same diameter It is possible.

The first rolling surface and the second rolling surface are curved to have the same diameter and the third rolling surface is curved to have a larger diameter than the second rolling surface, And the third slide ball may be provided with a larger diameter than the two slide balls.

The ball assembly may be provided such that a plurality of the first slide balls and the slide balls disposed at both side ends of the third slide ball have a larger tensile strength than the slide balls positioned at the center.

In addition, the ball assembly may be provided such that the slide balls disposed on both side ends of the plurality of second slide balls have a larger tensile strength than the slide balls positioned on the center side.

Furthermore, the ball assembly may be provided such that the difference in tensile strength between the slide balls having different tensile strengths is 400 MPa or more.

More specifically, the ball assembly may be formed of a material having a tensile strength of 405 to 2500 MPa and a material having a tensile strength of 5 to 150 MPa.

The stationary rail and the movable rail may further include a stopper protruding from the inner circumferential surface and restricting the movement of the ball assembly so that the ball assembly slides only within a predetermined area.

The intermediate rail may further include a stopper for restricting movement such that the ball assembly slides only within a predetermined area.

According to the slide apparatus for a drawer according to the present invention, noise can be reduced by using a slide ball having a low tensile strength as a whole, and a slide ball having a high tensile strength can be used for a portion to which an impact load is applied, Effect can be obtained.

1 is a perspective view schematically showing a slide device for a drawer according to an embodiment of the present invention,

2 is an exploded perspective view schematically showing a drawer slide device according to an embodiment of the present invention,

3 is a side view schematically showing a drawer slide device according to an embodiment of the present invention,

4 is a perspective view schematically showing a fixed rail and a movable rail extracted from a drawer slide device according to an embodiment of the present invention,

5 is a side view schematically showing a middle rail extracted from a drawer slide device according to an embodiment of the present invention.

6 is a perspective view schematically showing a middle rail extracted from a drawer slide device according to an embodiment of the present invention,

7 is a plan view schematically showing a retainer in a drawer slide device according to an embodiment of the present invention,

8 is a view schematically showing a load application state of a drawer slide device according to an embodiment of the present invention,

9 is a front view and a rear view schematically showing a state in which a ball assembly is arranged on a middle rail in a drawer slide device according to an embodiment of the present invention;

10 is a schematic view illustrating a drawer slide apparatus according to another embodiment of the present invention.

11 is a view schematically showing a drawer slide apparatus according to another embodiment of the present invention.

In order to facilitate understanding of the features of the present invention, the slide device for a drawer according to an embodiment of the present invention will be described in detail below.

It should be noted that, in order to facilitate understanding of the embodiments described below, reference numerals are added to the components of the accompanying drawings, so that the same components are denoted by the same reference numerals even though they are shown in different drawings . In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

Hereinafter, a specific embodiment of the present invention will be described with reference to the accompanying drawings.

1 to 3 are a perspective view, an exploded perspective view and a side view schematically showing a drawer slide device according to an embodiment of the present invention.

FIG. 4 is a perspective view schematically showing a fixed rail and a movable rail extracted from the drawer slide device, and FIGS. 5 and 6 are side views schematically showing the middle rail extracted from the drawer slide device. And FIG. 7 is a plan view schematically showing the retainer in the drawer slide device.

9 is a front view schematically showing a state in which the ball assembly is disposed on the intermediate rail in the drawer slide device. FIG. 8 is a view schematically showing a load state applied to the slide device for a drawer, And FIG.

1 to 9, a sliding device 100 for a drawer according to an embodiment of the present invention includes a fixed rail 200 fastened and fixed to a main body 10, A middle rail 400 disposed between the fixed rail 200 and the movable rail 300 for guiding sliding movement of the movable rail 300, a movable rail 300 sliding on the rail 200, A plurality of slide balls are disposed between the intermediate rail 400 and the fixed rail 200 and between the intermediate rail 400 and the movable rail 300 and are slidingly moved and have different tensile strengths. And a ball assembly 500 in which a slide ball having a large strength is arranged on the outermost side.

That is, in the present invention, a slide ball made of a material having a relatively small tensile strength is disposed on the center side, a slide ball made of a material having a relatively large tensile strength is disposed on the outermost side, and a slide Compared with a slide device using balls, noise can be reduced during operation, and rigidity can be reinforced compared with a slide device using only a slide ball made of a material having a small tensile strength.

The fixed rail 200 is fixed to the inner surface of the main body 10 and is fixed in position. The movable rail 300 is coupled to the outer surface of the housing 20 and slides on the fixed rail 200, So that the body 20 can be drawn in or drawn out.

A fixed rail stopper 210 protruding inwardly from the inner circumferential surface of the fixed rail 200 and the movable rail 300 for restricting the movement of the ball assembly 500 to slide only within a predetermined area, And a stopper 310 are respectively formed.

That is, as shown in FIG. 4, the fixed rail stopper 210 and the movable rail stopper 310 are formed as a pair and spaced apart from each other by a predetermined distance. With this configuration, the ball assembly 500 is caused to slide only between the fixed rail stopper 210 and the movable rail stopper 310, respectively.

The intermediate rail 400 includes a plate portion 410 disposed between the fixed rail 200 and the movable rail 300 and a plate portion 410 provided on both sides along the longitudinal direction of the plate portion 410, And a contact portion 420 having a rolling surface such that the slide ball of the slide plate 500 is partially received. Here, the rolling surfaces are formed at three sides of one side and the other side of the plate portion 410 so as to be spaced apart from each other along the circumferential direction thereof, and a plurality of slide balls are provided in rolling contact.

5, the contact portion 420 is formed on the upper side and the lower side of the plate portion 410, and the contact portion 420 formed on the upper side is formed to be opposite to the contact portion 420 formed on the lower side do. That is, three rolling surfaces are formed along the circumferential direction on the upper side of the plate portion 410, and three rolling surfaces are formed along the circumferential direction from the lower side of the plate portion 410.

6, the rolling surface includes a first rolling surface 421 curved at one side edge of the contact portion 420 and a second rolling surface 421 formed at the other edge of the contacting portion 420, And a third rolling surface 423 curved at a diameter larger than the second rolling surface 422 below the second rolling surface 422. The second rolling surface 422 is curved at the same diameter as the first rolling surface 422, . That is, the first and second

rolling surfaces

421 and 422 are provided with slide balls having the same diameter, and the third rolling surface 423 is provided with a slide ball with a larger diameter.

The intermediate rail 400 is provided with a middle rail stopper 430 for restricting movement of the ball assembly 500 so that the ball assembly 500 slides only within a predetermined area.

More specifically, the intermediate rail stoppers 430 are formed as a pair and spaced apart from each other by a predetermined distance, and protrude from the plate portion 410 toward the first rolling surface 421. That is, the distance between the intermediate rail stopper 430 and the ball assembly 500 is longer than the length of the ball assembly 500, so that the ball assembly 500 is slidably moved between the intermediate rail stoppers 430.

8, the intermediate rail stopper 430 formed on the upper side of the plate portion 410 is formed to be antiparallel to the intermediate rail stopper 430 formed on the lower side of the plate portion 410. As shown in FIG. That is, the intermediate rail stopper 430 formed on the upper side of the plate portion 410 is biased to the left with reference to the drawing, and the intermediate rail stopper 430 formed on the lower side of the plate portion 410, And is biased to the right. The distance between the intermediate rail stopper 430 formed on the upper side of the plate portion 410 and the distance between the intermediate rail stopper 430 formed on the lower side of the plate portion 410 may be different from each other.

The intermediate rail stopper 430 formed in this way restricts the moving range of the ball assembly 500 together with the fixed rail stopper 210 and the movable rail stopper 310 to limit the maximum draw-out distance of the accommodating body.

The ball assembly 500 includes a retainer 510 having a plurality of through holes formed in a lattice shape and having a plurality of through holes formed at both ends and corners at regular intervals in the longitudinal direction, A first slide ball 520 inserted into the first slide surface 511 and disposed on the first rolling surface 421 and a second slide ball 520 inserted into a second through hole 512 formed on an edge of the retainer 510, A second slide ball 530 provided at the same diameter as the second slide surface 520 and disposed on the second rolling surface 422 and a third through hole 513 formed on the other end of the retainer 510, And a third slide ball 540 having a larger diameter than the second slide ball 530 and disposed on the third rolling surface 423.

7, the retainer 510 has first through holes 511 formed at regular intervals along the longitudinal direction at one side end thereof, and second through holes 511 are formed at regular intervals along the longitudinal direction at the edges, And a third through hole 513 is formed at a predetermined distance along the longitudinal direction at the other end.

Here, the first through-hole 511 and the third through-hole 513 are provided on the same line, and the second through-hole 512 is formed through the first through-hole 511 and the third through- 513, respectively. With this configuration, the load points can be dispersed, the load applied to the slide device 100 for a drawer can be dispersed by the accommodating body, and the rigidity of the slide device for a drawer can be reinforced.

8, the first slide ball 520 and the second slide ball 530 are provided with the same diameter, and the third slide ball 540 is provided with the first slide ball 520 and the second slide ball 530, And is larger in diameter than the slide ball 520.

8, a rotational force R is applied in a clockwise direction so that the first slide ball 520 and the second slide ball 540 are rotated by the rotation of the first slide ball 520, A load P higher than that of the second slide ball 530 is applied. Particularly, when a heavy accommodating body is housed in the accommodating body 20, a larger load is applied to the third slide ball 540 by the rotational force R, thereby increasing the wear and damage of the third slide ball 540 .

Therefore, the third slide ball 540 and the third slide surface 423 are provided to have a larger diameter than the first slide ball 520 and the first rolling surface 421, The contact area of the rolling contact surface 540 is increased. The third slide ball 540 and the third slide ball 540 are dispersed so that the third slide ball 540 and the third slide ball 540 are dispersed in the concentrated load applied between the moving rail 300 and the third slide ball 540, The abrasion and damage of the substrate can be reduced.

9, the ball assembly 500 includes

slide balls

521 and 541 disposed at both ends of a plurality of the first slide ball 520 and the third slide ball 540, The

slide balls

522 and 542 have a larger tensile strength than the

slide balls

522 and 542.

The ball assembly 500 may be configured such that the slide ball 532 disposed at both ends of the plurality of second slide balls 530 has a larger tensile strength than the slide ball 532 positioned at the center have.

That is, the ball assembly 500 includes

slide balls

521 and 541 positioned at both ends of the first and

third slide balls

520 and 540 among the first to

third slide balls

520, 530, Or the

slide balls

521, 531, and 541 located at both ends of the first to

third slide balls

520, 530, and 540 may be formed of a material having a high tensile strength can do. Therefore, the number of the slide balls of the material having a large tensile strength can be selected in consideration of the required rigidity according to the intended use of the accommodating body.

Here, the ball assembly 500 can be applied to a material having a tensile strength of 400 MPa or more different from that of the slide ball having a different tensile strength.

More specifically, the slide ball having a large tensile strength is made of a material having a tensile strength of 405 to 2500 MPa, and the slide ball having a small tensile strength can be provided of a material having a tensile strength of 5 to 150 MPa.

For example, an iron ball slide ball having a tensile strength of 600 MPa is manufactured, and a slide ball made of a polyacetal resin (POM) having a tensile strength of 100 MPa is used. In the case of using only a slide ball made of iron and a slide ball made of a polyacetal resin The results are shown in Table 1 below.

In Table 1 below, the comparative example is a case where only a slide ball made of iron is used.

In the first embodiment, the

slide balls

521, 531, and 541 positioned at both ends of the first to

third slide balls

520, 530, and 540 are used as the slide balls. The

balls

522, 532 and 542 were made of a slide ball made of polyacetal resin.

In the second embodiment, the

slide balls

521 and 541, which are located at both side ends of the first and

third slide balls

520 and 540, are used as the slide balls, and the

slide balls

522, 542 and the second slide ball 530 were made of polyacetal resin.

	비교예Comparative Example	실시예 1Example 1		실시예 2Example 2
	[dB][dB]	[dB][dB]	개선율Improvement rate	[dB][dB]	개선율Improvement rate
ISO LoudnessISO Loudness	4.44.4	3.93.9	11%11%	2.52.5	56%56%

As shown in Table 1, in the comparative example, 4.4 dB of noise was generated during operation, 3.9 dB of noise was generated in Example 1, and the noise was improved by 11%. In the second embodiment, noise of 2.5 dB is generated and the noise is improved by 56%.

Therefore, compared with the case of using the slide ball made of all of the slide balls, the slide ball located at both ends is reinforced by using a slide ball made of a material having relatively high tensile strength such as iron and the like, The slide ball positioned can be made of a material having a relatively low tensile strength such as polyacetal resin to reduce noise generation.

10 is a view schematically showing a drawer slide apparatus according to another embodiment of the present invention.

Referring to FIG. 10, a slide device for a drawer according to another embodiment of the present invention is provided with the same configuration as the slide device for a drawer according to the embodiment of the present invention described with reference to FIGS. 1 to 9, 2 rolling surface and the third rolling surface are curved to have the same diameter, and the first slide ball, the second slide ball and the third slide ball are provided with the same diameter.

That is, in the slide device for a drawer according to another embodiment of the present invention, the first to third slide balls are provided with the same diameter.

The slide device for a drawer according to another embodiment of the present invention is provided in the same configuration as the slide device for a drawer according to the embodiment of the present invention described in Figs. 1 to 9, but differs in the number of arrayed slide balls.

That is, in the slide device for a drawer according to another embodiment of the present invention, as shown in Fig. 11 (a), the slide balls disposed on the contact portion are provided in two rows, The slide balls disposed in the contact portion may be provided in four rows.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It is to be understood that various changes and modifications may be made without departing from the scope of the appended claims.

Claims

A fixed rail fastened to the body;

A movable rail fastened to the housing and slidably moved on the fixed rail;

A middle rail disposed between the fixed rail and the movable rail and guiding the sliding movement of the movable rail; And

A plurality of slide balls disposed between the intermediate rail and the fixed rail and disposed between the intermediate rail and the moving rail and slidably moving and having different tensile strengths, Assembly;

And a sliding device for a drawer.
The method according to claim 1,

Wherein the intermediate rail comprises:

A plate portion disposed between the fixed rail and the movable rail; And

And a contact portion provided on both sides of the plate portion along the longitudinal direction and having a rolling surface for partially receiving the slide ball of the ball assembly,

Wherein the rolling surfaces are formed on the one and the other sides of the plate portion so as to be spaced from each other along the circumferential direction thereof.
3. The method of claim 2,

The ball assembly includes:

A retainer having a plurality of through holes formed at both ends and corners at regular intervals in the longitudinal direction;

A first slide ball inserted into a first through hole formed at one end of the retainer and disposed on a first rolling surface curved at one side edge of the contact portion;

A second slide ball inserted into a second through hole formed in an edge of the retainer and disposed on a second rolling surface curved at the other edge of the contact portion; And

A third slide ball inserted into a third through hole formed at the other end of the retainer and disposed on a third rolling surface curved at a lower side of the second rolling surface;

And a slide mechanism for sliding the drawer.
The method of claim 3,

The retainer

Wherein the first through-hole and the third through-hole are provided on the same line, and the second through-hole is provided between the first through-hole and the third through-hole.
The method of claim 3,

The first rolling surface, the second rolling surface, and the third rolling surface are curved to have the same diameter,

Wherein the first slide ball, the second slide ball, and the third slide ball have the same diameter.
The method of claim 3,

Wherein the first rolling surface and the second rolling surface are curved to have the same diameter, the third rolling surface is curved to a larger diameter than the second rolling surface,

Wherein the first slide ball and the second slide ball are provided with the same diameter and the third slide ball is provided with a larger diameter than the two slide balls.
The method of claim 3,

The ball assembly includes:

Wherein a plurality of the first slide balls and the slide balls disposed at both side ends of the third slide ball have a larger tensile strength than the slide balls located at the center side.
8. The method of claim 7,

The ball assembly includes:

Wherein a slide ball disposed at both side ends of the plurality of second slide balls has a larger tensile strength than a slide ball positioned at a center side.
The method according to claim 1,

The ball assembly includes:

Wherein a difference in tensile strength between the slide balls having different tensile strengths is 400 MPa or more.
The method according to claim 1,

The ball assembly includes:

Characterized in that the slide ball having a large tensile strength is made of a material having a tensile strength of 405 to 2500 MPa and the slide ball having a small tensile strength is made of a material having a tensile strength of 5 to 150 MPa.
The method according to claim 1,

Wherein the fixed rail and the movable rail are movable,

A stopper protruding from the inner circumferential surface and restricting movement of the ball assembly to slide only within a predetermined area;

Further comprising: a sliding member for sliding the drawer.
The method according to claim 1,

Wherein the intermediate rail comprises:

A stopper for restricting movement of the ball assembly so as to slide only within a predetermined area;

Further comprising: a sliding member for sliding the drawer.