Sliding device for drawer

Abstract

A sliding device is provided for a drawer which may provide a detent function by an elastic displacement to a rail member enabling a storage body to be moved from a main body in a sliding manner, thereby implementing a fixed maintenance force having a more robust state at a drawn-into location of the storage body to the main body. The sliding device includes: a first rail member which has a locking projection, an intermediate rail member coupled to be movable with respect to the first rail member, a second rail member coupled to be movable with respect to the intermediate rail member at a location opposite to the first rail member, and a detent member which is provided on the second rail member, and has an opening which accommodates the locking projection and a constraining protrusion which suppresses the locking projection from being separated from the opening.

Claims

1. A sliding device for a drawer comprising: a first rail member; an intermediate rail member which is coupled to be movable with respect to the first rail member; a second rail member which is coupled to be movable with respect to the intermediate rail member at a location opposite to the first rail member; a locking projection integrally formed on the first rail member, the locking projection having a drawn-out inclined surface portion inclined toward the second rail member; and a detent member provided on the second rail member and being elastically deformable when contacting the locking projection, the detent member comprising: an elastic behavior portion being elastically deformed and spaced at an interval from and parallel to the second rail member; an opening formed in the elastic behavior portion to receive the locking projection therein; and a constraining protrusion which suppresses the locking projection from being separated from the opening, the constraining protrusion protruding toward the opening and being bent with respect to the elastic behavior portion in a direction toward the second rail member so that when the first rail member is withdrawn from the second rail member, the elastic behavior portion is deflected toward the second rail member via contact between the constraining protrusion and the drawn-out inclined surface portion of the locking projection, wherein the locking projection and the opening are disposed on the same axis based on the moving direction of the first rail member with respect to the second rail member.

2. The sliding device for the drawer of claim 1, wherein the detent member comprises a fixing portion for coupling the detent member to the second rail member, wherein the elastic behavior portion is parallel to the fixing portion.

3. The sliding device for the drawer of claim 2, wherein the elastic behavior portion has a drawn-into guide surface which is bent downward toward the second rail member at a free end of the elastic behavior portion.

4. The sliding device for the drawer of claim 3, wherein the locking projection comprises a drawn-into inclined surface portion which is inclined downward toward the drawn-into guide surface at a location opposite to the drawn-out inclined surface portion.

5. The sliding device for the drawer of claim 4, wherein the drawn-into inclined surface portion and the drawn-out inclined surface portion are formed to protrude to have the same inclination angles based on the locking projection with respect to the first rail member.

6. The sliding device for the drawer of claim 1, wherein the second rail member has a locking protrusion which is bent upward for fixing the detent member.

7. The sliding device for the drawer of claim 6, wherein the detent member has a recess for coupling the locking protrusion.

8. The sliding device for the drawer of claim 1, wherein the detent member is partially cut from the second rail member and is bent upward and is integrally formed with the second rail member.

Description

DESCRIPTION OF DRAWINGS

(1) FIG. 1 is a perspective diagram illustrating a state where a sliding device for a drawer according to an exemplary embodiment of the present disclosure is drawn into.

(2) FIG. 2 is an exploded perspective diagram illustrating the sliding device for the drawer illustrated in FIG. 1.

(3) FIG. 3 is a bottom perspective diagram illustrating the sliding device for the drawer illustrated in FIG. 2.

(4) FIG. 4 is a perspective diagram illustrating a state where the sliding device for the drawer illustrated in FIG. 1 is drawn out.

(5) FIGS. 5 to 7 illustrate main portions of the present disclosure, and are enlarged cross-sectional diagrams sequentially illustrating the relative displacement relationship between a locking projection and a detent member in a drawn-into process of the rail member.

(6) FIG. 5 is a cross-sectional diagram illustrating the location relationship between the locking projection and the detent member in an initial state where the rail member is drawn into.

(7) FIG. 6 is a cross-sectional diagram illustrating an elastic displacement of the detent member according to the contact with the locking projection in the drawn-into process of the rail member.

(8) FIG. 7 is a cross-sectional diagram illustrating the location relationship between the locking projection and the detent member in a state where the rail member is completely drawn into.

(9) FIG. 8 is a perspective diagram illustrating a configuration of the detent member according to another exemplary embodiment of the present disclosure.

BEST MODE

(10) Hereinafter, preferred exemplary embodiments of the present disclosure will be described in detail with reference to the attached exemplary drawings.

(11) Referring to FIGS. 1 to 4, a sliding device for a drawer according to an exemplary embodiment of the present disclosure is configured to include a first rail member 10, a second rail member 20, a pair of intermediate rail members 30 which are movably coupled to the first rail member 10 and the second rail member 20, respectively, and a detent member 40 which implements a detent function by an elastic displacement in a drawn-into process and a drawn-out process between the first rail member 10 and the second rail member 20, respectively.

(12) In this case, the first rail member 10 and the second rail member 20 are selectively fixed to any one of a main body and a storage body to be coupled to be mutually movable through the intermediate rail member 30. An exemplary embodiment of the present disclosure to be described below is described based on a case where the first rail member 10 is fixed to a movable storage body such as a drawer, and the second rail member 20 is fixed to the main body of furniture, household appliance, or the like which accommodates the storage body so as to be drawn into and drawn out in a movable state.

(13) The first rail member 10 is fixed to the storage body, and has a bent portion 12 for supporting the seating of a rolling means (not illustrated) on the side portions opposite to each other along the longitudinal direction. In this case, the rolling means includes a ball cage which rotatably accommodates a plurality of balls, and the bent portion 12 is formed to be bent to have an appropriate curvature for stable contact with the balls of the rolling means.

(14) In addition, the first rail member 10 has a locking projection 14 which protrudes downward toward the interior to face the second rail member 20 to induce an elastic displacement of the detent member 40 when being in contact with the detent member 40. In addition, the first rail member 10 has a stopper 16 which protrudes toward the interior to be in contact with the intermediate rail member 30 at a location spaced apart from the locking projection 14 to limit the drawn-out stroke of the first rail member 10 to the intermediate rail member 30.

(15) Here, the locking projection 14 includes a drawn-into inclined surface portion 14a which is formed to be inclined downward toward the detent member 40 to be in contact with the detent member 40 at the drawn-into location, and a drawn-out inclined surface portion 14b which is formed to be inclined downward at a portion opposite to the drawn-into inclined surface portion 14a to be in contact with the detent member 40 at the drawn-out location, and more preferably, the drawn-into inclined surface portion 14a and the drawn-out inclined surface portion 14b are configured to be formed to protrude from the first rail member 10 to have the same inclination angles with respect to the locking projection 14.

(16) In this case, the locking projection 14 and the stopper 16 may be provided by bending downward toward the second rail member 20 in the form of partially cutting a material of the first rail member 10.

(17) The second rail member 20 is fixed to the main body, and has a bent portion 22 for supporting the seating of the rolling means (not illustrated) on the side portions opposite to each other along the longitudinal direction. Even in this case, the bent portion 22 is formed to be bent to have an appropriate curvature for stable contact with the balls of the rolling means.

(18) In addition, the second rail member 20 has a bending-type locking protrusion 24 which protrudes downward toward the interior for fixing the detent member 40. In addition, the second rail member 20 has a stopper 26 which protrudes toward the interior to be in contact with the intermediate rail member 30 at a location spaced apart from the locking protrusion 24 to limit the drawn-out stroke of the second rail member 20 to the intermediate rail member 30.

(19) In this case, the locking protrusion 24 and the stopper 26 may be provided by bending the first rail member 10 upward in the form of partially cutting a material of the second rail member 20.

(20) In addition, the second rail member 20 has a perforated hole 28 in the form of penetrating a material for coupling the detent member 40 by a riveting.

(21) The intermediate rail member 30 is a pair of members located between the first rail member 10 and the second rail member 20, and is configured to be coupled to the first rail member 10 and the second rail member 20 to be relatively movable through the rolling means, respectively. To this end, the intermediate rail member 30 has a bent portion 32 for supporting the seating of the rolling means (not illustrated) on the side portions opposite to each other along the longitudinal direction. Even in this case, the bent portion 32 is formed to be bent to have an appropriate curvature for stable contact with the balls of the rolling means.

(22) In addition, the intermediate rail member 30 has a first counter stopper 34 which is bent to limit the drawn-out stroke of the first rail member 10 to the intermediate rail member 30 by being in contact with the stopper 16 of the first rail member 10, and a second counter stopper 36 which is bent to limit the drawn-out stroke of the second rail member 20 to the intermediate rail member 30 by being in contact with the stopper 26 of the second rail member 20.

(23) In this case, the first counter stopper 34 and the second counter stopper 36 are formed at both free ends of the intermediate rail member 30 to correspond to the stopper 16 of the first rail member 10 and the stopper 26 of the second rail member 20 at locations opposite to each other, when the intermediate rail member 30 is viewed as a whole.

(24) The detent member 40 implements a detent function by an elastic displacement of each member in the drawn-into and drawn-out processes of the first rail member 10 with respect to the second rail member 20, and is formed in a cantilever shape which has one end fixed to the second rail member 20 and the other end protruding to be bent upward toward the locking projection 14 of the first rail member 10.

(25) In this case, the detent member 40 may be formed of a separate structure which is detachably coupled to the second rail member 20, or formed of an integral structure which is formed together with the second rail member 20.

(26) First, if the detent member 40 is formed of the separate structure which is detachably coupled to the second rail member 20, the structure is as follows.

(27) That is, the detent member 40 has a fixing portion 42 which is formed parallel to the second rail member 20 for coupling the second rail member 20, a connecting portion 44 which extends integrally from the fixing portion 42 and is bent upward, and an elastic behavior portion 46 which extends integrally from the connecting portion 44 and is bent parallel to the fixing portion 42 while being spaced apart therefrom at a predetermined interval, and the elastic behavior portion 46 is configured to have an opening 46a for accommodating the locking projection 14 therein and a constraining protrusion 46b which is bent downward to suppress the separation of the locking projection 14 from the opening 46a.

(28) Here, the opening 46a and the constraining protrusion 46b are each disposed on the same axis as the locking projection 14 based on the moving direction of the first rail member 10 with respect to the second rail member 20, and the width and length of the opening 46a are each set to sizes sufficient to accommodate the locking projection 14 therein.

(29) In addition, the detent member 40 has a perforated hole 42a for coupling the second rail member 20 by a riveting, and has a recess 42b for coupling the locking protrusion 24, and the perforated hole 42a is formed to penetrate the fixing portion 42, and the recess 42b is formed in a shape which is recessed by being partially cut from the free end of the fixing portion 42. That is, the fixing portion 42 of the detent member 40 has the perforated hole 42a for coupling the second rail member 20 by the riveting, and the recess 42b for coupling the locking protrusion 24.

(30) In addition, the elastic behavior portion 46 has a drawn-into guide surface 46c which is formed of a structure which is bent downward toward the locking projection 14 at the free end of the elastic behavior portion 46 to be inclined to be in contact with the drawn-into inclined surface portion 14a of the locking projection 14.

(31) Accordingly, in the sliding device for the drawer according to the present disclosure configured as described above, as illustrated in FIGS. 5 to 7, the elastic behavior portion 46 of the detent member 40 may be displaced downward by the contact between the locking projection 14 and the detent member 40 to guide the entry of the locking projection 14 into the opening 46a in the process where the first rail member 10 moves to the drawn-into location to the second rail member 20.

(32) That is, the elastic behavior portion 46 of the detent member 40 may be displaced downward by a pressing force according to the contact between the drawn-into inclined surface portion 14a of the locking projection 14 and the drawn-into guide surface 46c of the elastic behavior portion 46, and thus the locking projection 14 smoothly enters into the opening 46a of the detent member 40.

(33) In this case, the constraining protrusion 46b of the detent member 40 may more actively limit the separation of the locking projection 14 from the opening 46a by being in contact with the drawn-out inclined surface portion 14b of the locking projection 14, thereby implementing a fixed maintenance force having the robust state at the drawn-into location of the storage body to the main body.

(34) In addition, according to the present disclosure, if the first rail member 10 moves to the drawn-out location to the second rail member 20, the downward displacement of the elastic behavior portion 46 may be naturally induced through the contact between the drawn-out inclined surface portion 14b of the locking projection 14 and the constraining protrusion 46b of the elastic behavior portion 46, and in this process, since the locking projection 14 may pass the constraining protrusion 46b of the elastic behavior portion 46 and easily escape outward from the opening 46a, the location of the storage body may be switched from the drawn-into location to the drawn-out location with respect to the main body.

(35) In addition, as described above, when the storage body is switched to the drawn-out location while being switched to the drawn-into location with respect to the main body, the user may feel the shift manipulation feeling when the downward displacement of the elastic behavior portion 46 is accompanied by the contact between the locking projection 14 of the first rail member 10 and the elastic behavior portion 46 of the detent member 40, that is, the contact between the drawn-into inclined surface portion 14a of the locking projection 14 and the drawn-in guide surface 46c of the elastic behavior portion 46 and the contact between the drawn-out inclined surface portion 14b of the locking projection 14 and the constraining protrusion 46b of the elastic behavior portion 46.

(36) Meanwhile, as another exemplary embodiment of the present disclosure, if the detent member 40 is formed of an integral structure which is formed together with the second rail member 20, the structure may be as follows.

(37) That is, referring to FIG. 8, the detent member 40 has a bending-type elastic behavior portion 146 with an integral structure which is partially cut from the material of the second rail member 20 and bent upward and then disposed parallel to the second rail member 20 while being spaced apart therefrom at a predetermined interval. In this case, the elastic behavior portion 146 is configured to have an opening 146a for accommodating the locking projection 14 therein, a constraining protrusion 146b which is bent downward toward the drawn-out inclined surface portion 14b to suppress the locking projection 14 from being separated from the opening 146a, and a drawn-into guide surface 146c having an inclined structure which is bent downward toward the drawn-into inclined surface portion 14a of the locking projection 14 at the free end of the elastic behavior portion 146 to be in contact with the drawn-into inclined surface portion 14a of the locking projection 14, as an integral structure.

(38) In this case, it is natural that the configuration of the perforated hole 28 for the riveting with the locking protrusion 24 is removed from the second rail member 20, and it is natural that the configuration of the perforated hole 42a for the riveting and the recess 42b for coupling the locking protrusion 24 is also removed from the detent member 40. In addition, since the detent member 40 according to another exemplary embodiment of the present disclosure also performs the same operation and function as those in the exemplary embodiment, a detailed description thereof will be omitted.

(39) The above description is merely illustrative of the technical spirit of the present disclosure, and those skilled in the art to which the present disclosure pertains may make various modifications and variations without departing from the essential characteristics of the present disclosure. Accordingly, the exemplary embodiments disclosed in the present disclosure are not intended to limit the technical spirit of the present disclosure, but to explain it, and the scope of the technical spirit of the present disclosure is not limited by these exemplary embodiments. Accordingly, the protection scope of the present disclosure should be interpreted by the appended claims, and all technical spirits within the equivalent range should be interpreted as being included in the scope of the present disclosure.