EP2878227A1 - Sliding device for drawer - Google Patents
Sliding device for drawer Download PDFInfo
- Publication number
- EP2878227A1 EP2878227A1 EP13822268.2A EP13822268A EP2878227A1 EP 2878227 A1 EP2878227 A1 EP 2878227A1 EP 13822268 A EP13822268 A EP 13822268A EP 2878227 A1 EP2878227 A1 EP 2878227A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- ball
- drawer
- sliding device
- support
- raceway
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
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Classifications
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
- A47B96/00—Details of cabinets, racks or shelf units not covered by a single one of groups A47B43/00 - A47B95/00; General details of furniture
- A47B96/06—Brackets or similar supporting means for cabinets, racks or shelves
- A47B96/07—Brackets or similar supporting means for cabinets, racks or shelves adjustable in themselves
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
- A47B88/00—Drawers for tables, cabinets or like furniture; Guides for drawers
- A47B88/40—Sliding drawers; Slides or guides therefor
- A47B88/49—Sliding drawers; Slides or guides therefor with double extensible guides or parts
- A47B88/493—Sliding drawers; Slides or guides therefor with double extensible guides or parts with rollers, ball bearings, wheels, or the like
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
- A47B88/00—Drawers for tables, cabinets or like furniture; Guides for drawers
- A47B88/40—Sliding drawers; Slides or guides therefor
- A47B88/483—Sliding drawers; Slides or guides therefor with single extensible guides or parts
- A47B88/487—Sliding drawers; Slides or guides therefor with single extensible guides or parts with rollers, ball bearings, wheels, or the like
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
- A47B2210/00—General construction of drawers, guides and guide devices
- A47B2210/0002—Guide construction for drawers
- A47B2210/0029—Guide bearing means
- A47B2210/0032—Balls
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
- A47B2210/00—General construction of drawers, guides and guide devices
- A47B2210/0002—Guide construction for drawers
- A47B2210/0051—Guide position
- A47B2210/0059—Guide located at the side of the drawer
Definitions
- the sliding device 100 disposed at a first side of the drawer 13 is symmetrical to the sliding device 100' disposed at a second side of the drawer 13 with reference to the drawer 13. Given this, only the sliding device 100 is illustrated in Fig. 1 .
- Each ball 120, 120', 140, 140' is disposed between the corresponding adjacent two of the flanges 111, 111', 131, 131', 151, and 151'.
- the balls 120, 120', 140, and 140' slidably connect the sliding rails 110, 130, and 150 to each other. Guiding the movement of the balls 120 and 140, raceways 113, 133, 135, and 153 are formed in the flanges 111, 131, and 151. Raceways for guiding the movement of the balls 120' and 140' are also formed in the flanges 111', 131', and 151' although the reference numerals of these raceways have been omitted.
- the adjacent sliding rails are coupled to each other so as to be slidable in the direction parallel to the retraction direction B or the extension direction A of the drawer 13.
- the above-stated two imaginary lines IC1 and IC2 may be formed parallel to the vertical direction VL.
- an angle ( ⁇ 5, refer to Fig. 5 ) between the two imaginary lines IC1 and IC2 is 180o, and the angles ⁇ 1, ⁇ 2, ⁇ 3, and ⁇ 4 of the four support surfaces 2131, 2133, 2331, and 2333 relative to the vertical direction VL are the same as each other.
- the sliding device 200 must be configured such that the sliding device installed on one side of the drawer 13 and the sliding device installed on the other side of the drawer 13 are symmetric with respect to the drawer 13.
- the bent part 4135 is concave in a direction in which the ball 420 is inserted into the raceway 413, so that a portion of the ball 420 can be disposed in the raceway 413.
- the bent part 4135 is formed parallel to the retraction direction B or the extension direction A of the drawer 13.
- the ball 420, of which a portion of the first side is disposed in the raceway 413, is brought into contact with and supported by the first support surface 4131 and the second support surface 4133.
- the outer circumferential surface of the ball 420 can be brought into line contact with and supported by the inner circumferential surface of the each support portion 4132, 4134, 4532, 4534
Landscapes
- Drawers Of Furniture (AREA)
- Bearings For Parts Moving Linearly (AREA)
Abstract
Description
- The present invention generally relates to sliding devices for drawers and, more particularly, to a sliding device that is installed in an electronic apparatus or furniture provided with a drawer for storing an object therein so as to guide extension or retraction of the drawer.
- Generally, drawers are widely used in a variety of storage means, for example, furniture and electronic apparatuses such as refrigerators, so as to store objects. Such a drawer is provided with a sliding device so that the drawer can be easily opened or closed.
-
Fig. 1 illustrates a storage means provided with typical sliding devices for a drawer.Fig. 2 is a sectional view of the storage means ofFig. 1 . - Referring to
Figs. 1 and 2 , the storage means 10 for storing objects (not shown) includes a storage body 11 having astorage space 12 therein, and adrawer 13. Slidingdevices 100 and 100' respectively connect opposite sides of thedrawer 13 to the storage body 11. - The
drawer 13 for storing objects (not shown) therein is guided by thesliding devices 100 and 100' such that thedrawer 13 slides relative to the storage body 11 in a direction parallel to the X-axis of coordinates ofFig. 1 and thus is extended from thestorage space 12 in a direction designated by reference character A or retracted into thestorage space 12 in a direction designated by reference character B. - For reference, the
sliding device 100 disposed at a first side of thedrawer 13 is symmetrical to the sliding device 100' disposed at a second side of thedrawer 13 with reference to thedrawer 13. Given this, only thesliding device 100 is illustrated inFig. 1 . -
Fig. 3 is an enlarged sectional view of the sliding device illustrated inFig. 2 . - The
sliding device 100 includes a plurality of slidingrails balls rail flanges Fig. 1 . The longitudinal central line that is not shown inFig. 1 will be explained later herein with reference toFig. 4 . - Each
ball flanges balls sliding rails balls raceways flanges balls - The construction and operation of the
sliding device 100 were described in detail in Korean Patent Unexamined Publication No.10-2008-0059697 sliding device 100, and explanation thereof is thus deemed unnecessary. - A load G including the weight of the
drawer 12 and the weight of objects received therein is applied to thedrawer 12. Furthermore, as shown in the drawing, when thedrawer 13 is opened, force F derived from the load G or external force is applied to the outer end of thedrawer 13 downward in the vertical direction, that is, in a direction parallel to the Z-axis of coordinates ofFig. 1 . Reaction force F' to the force F is applied to the inner end of thedrawer 13 upward in the vertical direction parallel to the Z-axis. - Torsional loads M and M' are respectively applied to the
sliding devices 100 and 100' by the forces G, F, and F'. - As shown by the curved arrows of
Fig. 2 , the torsional load M is applied to thesliding device 100, disposed at the first side of thedrawer 13, in the clockwise direction with respect to the longitudinal central line. The torsional load M is applied to the sliding device 100', disposed at the second side of thedrawer 13, in the counterclockwise direction. - For reference, detailed explanation of the torsional load applied to the
sliding device 100 is in Korean Patent Registration No.10-1021574 - Because of the torsional loads M applied to the
sliding device 100, forces P1 and P2 are applied to theball 120 between theflanges - Such forces P1 and P2 acting in a direction inclined by a predetermined angle θ are also applied between the
other balls flanges sliding device 100 in a direction inclined by a predetermined angle θ relative to the vertical direction VL. Furthermore, forces acting in a direction inclined relative to the vertical direction are also applied by the torsional load M' to the sliding device 100' disposed on the second side of thedrawer 13; however, illustration of these forces is deemed unnecessary for the sake of explanation. - Typically, each
raceway corresponding balls balls drawer 13, while thedrawer 13 is repeatedly extended in the direction B or retracted in the direction A. If theballs raceway - If the sliding
rail drawer 13 may not be smoothly opened or closed, or noise may occur during the extension or retraction process of thedrawer 13. In addition, the lifetime of the slidingrail - Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and an object of the present invention is to prevent a sliding device for a drawer from being deformed or abnormally worn and to increase the lifetime of the sliding device.
- In order to accomplish the above object, the present invention provides a sliding device for guiding a drawer such that the drawer is extended from or retracted into a storage space formed in a storage body. The sliding device includes: a plurality of sliding rails each having a pair of flanges; and a plurality of balls slidably connecting the sliding rails to each other. Each of the flanges may include a raceway in which a portion of the corresponding ball is disposed. The raceway guides the ball such that the ball rolls in a direction of extension or retraction of the drawer. The raceway includes: a bent part extending parallel to the direction of extension or retraction of the drawer, the bent part being concave in a direction in which the ball is inserted into the raceway; and a plurality of support surfaces disposed forming a symmetric structure with respect to an imaginary line connecting a center point of the ball to the bent part, the support surfaces supporting the ball thereon.
- The support surfaces may comprise a pair of support surfaces.
- Each of the pair of support surfaces may have a planar shape.
- Each of the pair of support surfaces may have a curved shape that is concave toward a portion thereof making contact with the ball. A radius of curvature of the support surface may range from more than 50% of a diameter of the ball to 60% of the diameter of the ball.
- Each of the pair of support surfaces may have therein a support depression in which a portion of the ball is disposed. The support depression may extend parallel to the direction of extension or retraction of the drawer. A radius of curvature of the support depression may range from 50% of a diameter of the ball to 60% of the diameter of the ball. The support depression may have a radius of curvature corresponding to a radius of the ball so that the support depression comes into line contact with the ball.
- A space may be defined between the bent part and the corresponding ball.
- In embodiments of a sliding device for a drawer according to the present invention, a support surface that can support force applied to balls in a direction inclined to the vertical direction is formed on a raceway. Thereby, the sliding rail can be prevented from being deformed or abnormally worn, and the lifetime of the sliding device can be increased.
- Furthermore, a space is formed between the raceway and the balls so that a lubricant is retained in the space or fine dust caused by abrasion between parts is collected. Thereby, even after the sliding device has been used over a long period of time, the sliding device can be reliably operated.
-
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Fig. 1 is a perspective view showing a storage means provided with typical sliding devices for a drawer; -
Fig. 2 is a sectional view of the storage means ofFig. 1 ; -
Fig. 3 is a sectional view of the sliding device illustrated inFig. 2 ; -
Fig. 4 is a sectional view illustrating a sliding device for a drawer according to a first embodiment of the present invention; -
Fig. 5 is an enlarged view of portion V ofFig. 4 ; -
Fig. 6 is a sectional view illustrating a sliding device for a drawer according to a second embodiment of the present invention; -
Fig. 7 is an enlarged view of portion VII ofFig. 6 ; -
Fig. 8 is a sectional view illustrating a sliding device for a drawer according to a third embodiment of the present invention; and -
Fig. 9 is an enlarged view of portion IX ofFig. 8 . - The present invention will now be described in detail based on aspects (or embodiments). The present invention may, however, be embodied in many different forms and should not be construed as being limited to only the embodiments set forth herein, but should be construed as covering modifications, equivalents or alternatives falling within ideas and technical scope of the present invention. In the following description of the invention, if the related known functions or specific instructions on configuring the gist of the present invention unnecessarily obscure the gist of the invention, the detailed description thereof will be omitted.
- Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings.
-
Fig. 4 is a sectional view illustrating a sliding device for a drawer according to a first embodiment of the present invention. - Referring to
Fig. 4 , a slidingdevice 200 for a drawer according to a first embodiment of the present invention includes three slidingrails balls device 200 may further include a retainer that supports theballs balls - Each sliding
rail flanges - For the sake of explanation, the three sliding
rails rail 210, the second slidingrail 230 and the third slidingrail 250 according to a sequence of arrangement. - Two
flanges 211 and 211' are provided on the first slidingrail 210 to be symmetric with respect to a longitudinal central line CL1. Twoflanges 231 and 231' are provided on the second slidingrail 230 to be symmetrical with respect to a longitudinal central line CL2. Twoflanges 251 and 251' are provided on the third slidingrail 250 to be symmetrical with respect to a longitudinal central line CL3. -
Balls 220 and 220' are respectively provided in spaces between theflanges 211 and 211' of the first slidingrail 210 and theflanges 231 and 231' of the second slidingrail 230 that are disposed adjacent to theflanges 211 and 211'.Balls flanges 231 and 231' of the second slidingrail 230 and theflanges 251 and 251' of the third slidingrail 250 that are disposed adjacent to theflanges 231 and 231'. - A
raceway 213 in which a portion of theball 220 is disposed is formed in a surface of theflange 211 of the first slidingrail 210. Araceway 233 in which a portion of theball 220 is disposed is also formed in a first surface of theflange 231 of the second slidingrail 230 that faces theball 220. - A
raceway 235 in which a portion of theball 240 is disposed is formed in a second surface of theflange 231 of the second slidingrail 230 that faces theball 240. Araceway 253 in which a portion of theball 240 is disposed is formed in a surface of theflange 251 of the third slidingrail 250 that faces theball 240. - Although it is not shown in the drawings, a plurality of
balls 220 and a plurality ofballs 240 are arranged in the longitudinal direction of the slidingrails raceway Fig. 1 ) in which a drawer (13 ofFig. 1 ) is retracted or in a direction (A ofFig. 1 ) in which the drawer is extended, that is, in the direction parallel to the X-axis. Theballs raceways drawer 13 can slide in the retraction direction B or the extension direction A. - Furthermore, raceways are also respectively formed in the flanges 211', 231' and 251', although they are not designated by reference numerals. The
balls 220' and 240' are partially disposed in the respective raceways. Thus, theballs 220' and 240' can roll in the direction parallel to the retraction direction B or extension direction A of thedrawer 13 under guidance of the raceways. - Therefore, the first sliding
rail 210 and the second slidingrail 230 are coupled to each other so as to be slidable relative to each other by theballs 220 and 220' in the direction parallel to the X-axis of coordinates. The second slidingrail 230 and the third slidingrail 240 are coupled to each other so as to be slidable relative to each other by theballs - That is, of the sliding
rails drawer 13. - To make the sliding
rails rails - For reference, the second sliding
rail 230 is provided to increase the distance range within which the slidingdevice 200 can guide the retraction B and the extension A of thedrawer 13. Although it is not shown in the drawings, as needed, at least one additional sliding rail (not shown) and a plurality of additional balls (not shown) may be provided between the second slidingrail 230 and the third slidingrail 250. - Alternatively, although it is not shown in the drawings, if the sliding
device 200 is used in asmall drawer 13 and thus does not require a comparatively long distance range within which thedrawer 13 can be extended, the first slidingrail 210 and the third slidingrail 250 may be directly coupled to each other. In this case, the second slidingrail 230 and theballs flanges 211 of the first slidingrail 210 is reduced, or the distance between theflanges 251 of the third slidingrail 250 is increased. - In other words, the sliding
device 200 according to the first embodiment of the present invention may have a three stage structure having the three slidingrails device 200 may be used as one of sliding devices having other multiple stage structures, for example, a two stage structure or more than three stage structure. - This can be applied to other embodiments of the present invention, which will be explained later herein.
-
Fig. 5 is an enlarged view of portion V ofFig. 4 . - Referring to
Fig. 5 , a pair ofsupport surfaces bent part 2135 are formed in theraceway 213 formed in eachflange 211 of the first slidingrail 210. For the sake of explanation, the support surfaces 2131 and 2133 respectively refer to afirst support surface 2131 and asecond support surface 2133. - The
bent part 2135 is concave in a direction in which theball 220 is inserted into theraceway 213, so that a portion of theball 220 can be disposed in theraceway 213. Thebent part 2135 is formed parallel to the retraction direction (B ofFig. 1 ) or the extension direction (A ofFig. 1 ) of the drawer (13 ofFig. 1 ). - That is, the
first support surface 2131 and thesecond support surface 2133 are formed on opposite sides of thebent part 2135 so as to form a concave bent shape. A portion of a first side of theball 220 is disposed in the concave bent part. Theball 220, of which a portion of the first side is disposed in theraceway 213, is brought into contact with and supported by thefirst support surface 2131 and thesecond support surface 2133. - The
first support surface 2131 and thesecond support surface 2133 are symmetrical to each other with respect to an imaginary line IC1 connecting thebent part 2135 to a center point 01 of theball 220. An angle θ1 between the imaginary line IC1 and thefirst support surface 2131 is the same as an angle θ2 between the imaginary line IC1 and thesecond support surface 2133. - Meanwhile, a pair of
planar support surfaces bent parts 2335 are also formed in theraceway 233 formed in the first surface of theflange 231 of the second slidingrail 230. For the sake of explanation, the support surfaces 2331 and 2333 respectively refer to athird support surface 2331 and afourth support surface 2333. - The
bent part 2335 is concave in a direction in which theball 220 is inserted into theraceway 233, so that a portion of theball 220 can be disposed in theraceway 233. Thebent part 2335 is also formed parallel to the retraction direction B or the extension direction A of thedrawer 13. - That is, the
third support surface 2331 and thefourth support surface 2333 are formed on opposite sides of thebent part 2135 so as to form a concave bent shape. A portion of a second side of theball 220 is disposed in this concave bent part. Theball 220, of which a portion of the second side is disposed in theraceway 233, is brought into contact with and supported by thethird support surface 2331 and thefourth support surface 2333. - The
third support surface 2331 and thefourth support surface 2333 are symmetrical to each other with respect to an imaginary line IC2 connecting thebent part 2335 to the center point 01 of theball 220. An angle θ3 between the imaginary line IC2 and thethird support surface 2331 is the same as an angle θ4 between the imaginary line IC2 and thefourth support surface 2333. - A contact point between the
ball 220 and thefirst support surface 2131 refers to afirst support point 2132. A contact point between theball 220 and thesecond support surface 2133 refers to asecond support point 2134. A contact point between theball 220 and thethird support surface 2331 refers to athird support point 2332. A contact point between theball 220 and thefourth support surface 2333 refers to afourth support point 2334. In this case, theball 220 is surrounded by the foursupport surfaces support points - That is, the
raceways ball 220 use the foursupport surfaces ball 220. Therefore, theraceways support points Fig. 1 ). Consequently, a load applied to the slidingdevice 100 according to the first embodiment of the present invention is uniformly dispersed, whereby the load support performance of the slidingdevice 100 can be enhanced, and the expected lifetime thereof can be increased. - Because the sliding
device 200 according to the first embodiment of the present invention has the above-mentioned construction, theballs 220 can be guided by theraceways balls 220 roll in the direction parallel to the retraction direction B or extension direction A of thedrawer 13. In addition, even when force is applied to theballs 220 in a direction (refer to P1 or P2 ofFig. 1 ) inclined to a vertical direction (VL ofFig. 3 ), theballs 220 can be prevented from being displaced from the original trajectory while rolling along theraceways - Therefore, in the sliding
device 200 according to the first embodiment of the present invention, the slidingrails device 200 can also be increased. - Meanwhile, a
space 2136 is defined between thebent part 2135 formed theraceway 213 of the first slidingrail 210 and an outer circumferential surface of the first side of theball 220. Aspace 2336 is defined between thebent part 2335 formed theraceway 233 of the second slidingrail 230 and an outer circumferential surface of the second side of theball 220. - Although it is not shown in the drawings, a lubricant is applied between the
balls 220 and theraceways balls 220 easier. Here, as the rolling of theballs 220 is repeated, oil films that have been formed between the support points 2132, 2133, 2332, and 2334 and the outer circumferential surfaces of theballs 220 may be become lost. However, in the slidingdevice 200 according to the first embodiment the present invention, the lubricant that has been present in thespaces balls 220, thus replenishing the oil films so that the lubricant effect can be sustained. - Furthermore, as contact between the
balls 220 and the foursupport surfaces balls 220. However, in the slidingdevice 200 according to the first embodiment the present invention, such fine dust can be collected in thespaces device 200 is used over a long period of time, theballs 220 can smoothly roll. - Meanwhile, the above-stated two imaginary lines IC1 and IC2 may be formed parallel to the vertical direction VL. In this case, an angle (θ5, refer to
Fig. 5 ) between the two imaginary lines IC1 and IC2 is 180º, and the angles θ1, θ2, θ3, and θ4 of the foursupport surfaces - For reference, if the four
support surfaces ball 220 in a direction inclined to the vertical direction (VL ofFig. 3 ), the foursupport surfaces - The orientation angles of the four
support surfaces device 200 is manufactured and installed in the storage means (refer to 10 ofFig. 1 ) and then a test is conducted. - Meanwhile, the
raceway 235 is formed on the second surface of theflange 231 of the second slidingrail 230. A pair ofsupport surfaces bent part 2355 are formed in theraceway 235. - The
bent part 2355 is concave in a direction in which theball 240 is inserted into theraceway 235, so that a portion of theball 240 can be disposed in theraceway 235. Thebent part 2355 is formed parallel to the retraction direction B or the extension direction A of thedrawer 13. - The
balls flange 231 of the second slidingrail 230. Given this, the structures of theraceways ball 240 rolling in the direction parallel to the retraction direction B or the extension direction A of thedrawer 13 are respectively the same as those of the above-mentionedraceways raceways rail 210 while theraceways rail 250. Therefore, further explanation will be omitted. - Generally, two sliding
devices 200 are symmetrically installed on the respective opposite sides of the drawer (13 ofFig. 1 ). Therefore, if the slidingdevice 200 is configured such that it can be used on either side of thedrawer 13, the compatibility of the slidingdevice 200 as well as parts constituting the slidingdevice 200 can be enhanced, and inventory can be reduced. - To make is possible to use the sliding
device 200 on either side of thedrawer 13, for example, the slidingdevice 200 must be configured such that the sliding device installed on one side of thedrawer 13 and the sliding device installed on the other side of thedrawer 13 are symmetric with respect to thedrawer 13. - To achieve the above purpose, for instance, the sliding
device 200 has a symmetric structure with respect to a central plane CS. The term "central plane" refers to a plane on which all of the longitudinal central lines CL1, CL2, and CL3 of the slidingrails - If all of the longitudinal central lines CL1, CL2, and CL3 of the sliding
rails device 200 can have a symmetric structure with respect to the central plane CS. - In this case, because the
raceways device 200 that can be installed on one side of thedrawer 13 can also be installed on the other side of thedrawer 13. - Furthermore, in the sliding
device 200 according to the first embodiment of the present invention, each slidingrail device 200, description of the remaining portion of the slidingdevice 200 that includes the flanges 211' and 231' and theballs 220' and 240' will be omitted. Also, in the following description of the other embodiments of the present invention, if a part has a symmetric structure with respect to the central plane CS, only one of either side of the part will be representatively explained. - For reference, in the above description of the sliding
device 200 according to the first embodiment of the present invention, although a pair of support surfaces has been illustrated as being formed on eachraceway ball 220 is supported, thus dispersing as much force applied to theball 220 as possible. -
Fig. 6 is a sectional view of a sliding device for a drawer according to a second embodiment of the present invention. - Referring to
Fig. 6 , the slidingdevice 300 according to the second embodiment of the present invention includes two slidingrails balls 320 and 340. Each slidingrail flanges rails rail 310 and a second slidingrail 350 sequentially arranged. - The
balls 320 are disposed between theflange 311 of the first slidingrail 310 and theflange 351 of the second slidingrail 350 that is adjacent to theflange 311. - A
raceway 313 in which a portion of a first side of eachball 320 is disposed is formed in a surface of theflange 311 of the first slidingrail 310. Araceway 353 in which a portion of a second side of theball 320 is disposed is also formed in a surface of theflange 351 of the second slidingrail 350 that faces theball 320. - The
balls 320 are arranged in a line. Theraceways Fig. 1 ) or the extension direction (A ofFig. 1 ) of the drawer (13 ofFig. 1 ) so that theballs 320 can roll in the direction parallel to the retraction direction B or extension direction A of thedrawer 13 under guidance of theraceways rails drawer 13. -
Fig. 7 is an enlarged view of portion VII ofFig. 6 . - Referring to
Fig. 7 , a pair ofcurved support surfaces bent part 3135 are formed in theraceway 313 formed in eachflange 311 of the first slidingrail 310. For the sake of explanation, the support surfaces 3131 and 3133 respectively refer to afirst support surface 3131 and asecond support surface 3133. - The
bent part 3135 is concave in a direction in which theball 320 is inserted into theraceway 313, so that a portion of theball 320 can be disposed in theraceway 313. Thebent part 3135 is formed parallel to the retraction direction B or the extension direction A of thedrawer 13, in other words, parallel to the X-axis of coordinates ofFig. 4 . That is, theball 320, of which a portion of the first side is disposed in theraceway 313, is brought into contact with and supported by thefirst support surface 3131 and thesecond support surface 3133. - The
first support surface 3131 and thesecond support surface 3133 are formed to be symmetrical to each other with respect to an imaginary line IC3 connecting thebent part 3135 to acenter point 02 of theball 320. That is, the arc-shapedfirst support surface 3131 and the arc-shapedsecond support surface 3133 are symmetrical to each other with respect to the imaginary line IC3. - A pair of
curved support surfaces bent part 3535 are formed in theraceway 353 formed in a surface of eachflange 351 of the second slidingrail 350. Thecurved support surfaces bent part 3535 are symmetrical to the support surfaces 3131 and 3133 and thebent part 3135 with respect to thecenter point 02 of theball 320; therefore, further explanation is deemed unnecessary. - For the sake of explanation, the support surfaces 3531 and 3533 respectively refer to a
third support surface 3531 and afourth support surface 3533. The arc-shapedthird support surface 3531 and the arc-shapedfourth support surface 3533 are disposed to be symmetrical to each other with respect to an imaginary line IC4 connecting thebent part 3535 to thecenter point 02 of theball 320. - A contact point between the
ball 320 and thefirst support surface 3131 refers to afirst support point 3132. A contact point between theball 320 and thesecond support surface 3133 refers to asecond support point 3134. A contact point between theball 320 and thethird support surface 3531 refers to athird support point 3532. A contact point between theball 320 and thefourth support surface 3533 refers to afourth support point 3534. In this case, theball 320 is surrounded by the foursupport surfaces ball 320 is brought into contact with and supported by the foursupport points - The
ball 320 is guided by theraceways ball 320 such that theball 320 rolls in the direction parallel to the retraction direction B or extension direction A of thedrawer 13. Therefore, as explained above, even when force is applied to theball 320 in a direction P1 or P2 inclined to the vertical direction (VL ofFig. 3 ), theball 320 can be prevented from being displaced from the original trajectory. - Therefore, in the sliding
device 300 according to the second embodiment of the present invention, the slidingrails device 300 can also be increased. - For reference, a curvature radius of each of the four
support surfaces Fig. 1 ) is changed. In detail, the curvature radius of the eachsupport surface ball 320 to 60% of the diameter 2Rb. - Meanwhile, a
space 3136 is defined between thebent part 3135 formed theraceway 313 of the first slidingrail 310 and the outer circumferential surface of the first side of theball 320. Aspace 3536 is defined between thebent part 3535 formed theraceway 353 of the second slidingrail 350 and the outer circumferential surface of the second side of theball 320. The shape, operation, and effect of thespaces Fig. 5 ); therefore, further explanation will be omitted. - In the sliding
device 300 according to the second embodiment of the present invention, the foursupport surfaces Fig. 3 ) that is applied toward thecenter point 02 of theball 320 in a direction inclined to the vertical direction (VL ofFig. 3 ). Therefore, the foursupport surfaces support surfaces center point 02 of theball 320. That is, the two imaginary lines IC3 and IC4 described above may be oriented parallel to the vertical direction (VL ofFig. 3 ). - In the sliding
device 300 according to the second embodiment of the present invention, theraceways device 300 that is installed on either side of thedrawer 13 can be used on the other side of thedrawer 13. Therefore, the compatibility of the slidingdevice 300 as well as parts constituting the slidingdevice 300 can be enhanced, and inventory can be reduced. - For reference, the first sliding
rail 310 is fastened to either the drawer (13 ofFig. 1 ) or a storage body (11 ofFig. 1 ) of the storage means (10 ofFig. 1 ), and the second slidingrail 350 is fastened to the other one of thedrawer 13 and the storage body 11. Consequently, the slidingdevice 300 according to the second embodiment of the present invention can guide thedrawer 13 such that thedrawer 13 can be smoothly moved relative to the storage body 11 in the retraction direction B or the extension direction A. - Although it is not shown in the drawings, if there is a need for an increase in distance that the
drawer 13 can be extended from the storage body 11, at least one additional sliding rail having the same structure as the second slidingrail 230 ofFig. 4 may be installed between the first slidingrail 310 and the second slidingrail 350. -
Fig. 8 is a sectional view of a sliding device for a drawer according to a third embodiment of the present invention. - Referring to
Fig. 8 , the slidingdevice 400 according to the third embodiment of the present invention includes two slidingrails balls 420. Each slidingrail flanges rails rail 410 and a second slidingrail 450 in a sequence of arrangement. - The
balls 420 are disposed between theflange 411 of the first slidingrail 410 and theflange 451 of the second slidingrail 450 that is adjacent to theflange 411. - A
raceway 413 in which a portion of a first side of eachball 420 is disposed is formed in a surface of theflange 411 of the first slidingrail 410. Araceway 453 in which a portion of a second side of theball 420 is disposed is also formed in a surface of theflange 451 of the second slidingrail 450 that faces theball 420. - The
raceways Fig. 1 ) or the extension direction (A ofFig. 1 ) of the drawer (13 ofFig. 1 ) so that theballs 420 can roll in the retraction direction B or extension direction A of thedrawer 13 under guidance of theraceways -
Fig. 9 is an enlarged view of portion IX ofFig. 8 . - Referring to
Fig. 9 , a pair ofplanar support surfaces bent part 4135 are formed in theraceway 413 formed in eachflange 411 of the first slidingrail 410. For the sake of explanation, the support surfaces 4131 and 4133 respectively refer to afirst support surface 4131 and asecond support surface 4133. - The
bent part 4135 is concave in a direction in which theball 420 is inserted into theraceway 413, so that a portion of theball 420 can be disposed in theraceway 413. Thebent part 4135 is formed parallel to the retraction direction B or the extension direction A of thedrawer 13. Theball 420, of which a portion of the first side is disposed in theraceway 413, is brought into contact with and supported by thefirst support surface 4131 and thesecond support surface 4133. - Likewise, a pair of
planar support surfaces bent part 4535 are formed in theraceway 453 formed in a surface of eachflange 451 of the second slidingrail 450. Thecurved support surfaces bent part 4535 are symmetrical to the support surfaces 4131 and 4133 and thebent part 4135 with respect to acenter point 03 of theball 420; therefore, further explanation is deemed unnecessary. -
Support depressions ball 420, are respectively formed in the foursurfaces support depressions drawer 13. An inner circumferential surface of eachsupport depression - The support surfaces 4131 and 4133 formed on the
flange 411 are symmetrical to each other with respect to an imaginary line (not shown) connecting thebent part 4135 to acenter point 03 of theball 420. The support surfaces 4531 and 4533 formed on theflange 451 are symmetrical to each other with respect to an imaginary line (not shown) connecting thebent part 4535 to thecenter point 03 of theball 420. - The
support depressions concave support portions ball 420 makes contact with thesupport depressions support depression ball 420 to 60% of the diameter 2Rb. - Alternatively, each
support surface support depression center point 03 of theball 420; and a curvature radius of the inner circumferential surface of thesupport depression ball 420. That is, if the curvature radius of the inner circumferential surface of thesupport depression ball 420, the outer circumferential surface of theball 420 can be brought into line contact with and supported by the inner circumferential surface of the eachsupport portion - In this case, the force with which the
raceways ball 420 is increased compared to that of the structure in which each raceway comes into point contact with the outer surface of theball 420. Therefore, if thedrawer 13 is designed keeping in mind that a comparatively heavy object may be stored in thedrawer 13, it is preferable that the slidingdevice 400 according to the third embodiment of the present invention be used. - A
space 3136 is defined between thebent part 4135 formed theraceway 413 of the first slidingrail 410 and the outer circumferential surface of the first side of theball 420. Aspace 4536 is defined between thebent part 4535 formed theraceway 453 of the second slidingrail 450 and the outer circumferential surface of the second side of theball 420. The shape, operation, and effect of thespaces Fig. 5 ); therefore, further explanation will be omitted. - For reference, the
support depressions device 400 according to the third embodiment of the present invention can also be applied to the slidingdevice 200 according to the first embodiment or the slidingdevice 300 according to the second embodiment. - Although the preferred embodiments of the sliding device for drawers according to the present invention have been disclosed for illustrative purposes, the spirit of the invention is not limited to the embodiments. Those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims. Such modifications, additions and substitutions must be regarded as falling within the scope of the present invention.
-
- 200, 300, 400: sliding device for drawers
- 210, 230, 250, 310, 350, 410, 450: sliding rail
- 211, 231, 251, 311, 351, 411, 451: flange
- 220, 240, 320, 420: ball
- 213, 233, 235, 253, 313, 353, 413, 453: raceway
Claims (9)
- A sliding device for guiding a drawer such that the drawer is extended from or retracted into a storage space formed in a storage body, the sliding device comprising:a plurality of sliding rails each having a pair of flanges; anda plurality of balls slidably connecting the sliding rails to each other,wherein each of the flanges comprises a raceway in which a portion of the corresponding ball is disposed, the raceway guiding the ball such that the ball rolls in a direction of extension or retraction of the drawer,wherein the raceway comprises:a bent part extending parallel to the direction of extension or retraction of the drawer, the bent part being concave in a direction in which the ball is inserted into the raceway; anda plurality of support surfaces disposed forming a symmetric structure with respect to an imaginary line connecting a center point of the ball to the bent part, the support surfaces supporting the ball thereon.
- The sliding device of claim 1, wherein the support surfaces comprise a pair of support surfaces.
- The sliding device of claim 2, wherein each of the pair of support surfaces has a planar shape.
- The sliding device of claim 2, wherein each of the pair of support surfaces has a curved shape that is concave toward a portion thereof making contact with the ball.
- The sliding device of claim 4, wherein a radius of curvature of the support surface ranges from more than 50% of a diameter of the ball to 60% of the diameter of the ball.
- The sliding device of any one of claims 3 through 5, wherein each of the pair of support surfaces has therein a support depression in which a portion of the ball is disposed, the support depression extending parallel to the direction of extension or retraction of the drawer.
- The sliding device of claim 6, wherein a radius of curvature of the support depression ranges from 50% of a diameter of the ball to 60% of the diameter of the ball.
- The sliding device of claim 6, wherein the support depression has a radius of curvature corresponding to a radius of the ball so that the support depression comes into line contact with the ball.
- The sliding device of claim 1, wherein a space is defined between the bent part and the corresponding ball.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020120081590A KR101352439B1 (en) | 2012-07-26 | 2012-07-26 | Sliding device for drawer |
PCT/KR2013/006408 WO2014017775A1 (en) | 2012-07-26 | 2013-07-18 | Sliding device for drawer |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2878227A1 true EP2878227A1 (en) | 2015-06-03 |
EP2878227A4 EP2878227A4 (en) | 2016-03-30 |
Family
ID=49997532
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP13822268.2A Withdrawn EP2878227A4 (en) | 2012-07-26 | 2013-07-18 | Sliding device for drawer |
Country Status (5)
Country | Link |
---|---|
US (1) | US20150189990A1 (en) |
EP (1) | EP2878227A4 (en) |
KR (1) | KR101352439B1 (en) |
CN (1) | CN104540418B (en) |
WO (1) | WO2014017775A1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106667084A (en) * | 2016-08-26 | 2017-05-17 | 四川昱峰医疗器械有限公司 | Storage device capable of simultaneously storing solid and liquid medicines |
KR20190085332A (en) | 2018-01-10 | 2019-07-18 | (주)세고스 | Sliding apparatus for drawer |
CN108195131B (en) * | 2018-01-19 | 2020-03-31 | 青岛海尔股份有限公司 | Refrigerator, refrigerator door body and reversible bottle seat |
Family Cites Families (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE650068C (en) * | 1930-11-08 | 1937-09-15 | Ziehl Gustav | Ball track guide for drawers |
US2201227A (en) * | 1939-02-13 | 1940-05-21 | Charles C Casey | Track and carriage for sorting devices |
US3405979A (en) * | 1965-04-19 | 1968-10-15 | Tenny D. Lode | Vibration isolation |
US3451730A (en) * | 1967-10-16 | 1969-06-24 | Gen Fireproofing Co The | Drawer suspension |
JPS5418435Y2 (en) * | 1975-03-13 | 1979-07-12 | ||
NL163711C (en) * | 1976-09-09 | 1980-10-15 | Regout Nv Thomas | TELESCOPIC RAIL GUIDANCE. |
JPS54124620U (en) * | 1978-02-17 | 1979-08-31 | ||
DE3122124C2 (en) * | 1981-06-04 | 1986-09-11 | Aluminium Walzwerke Singen Gmbh, 7700 Singen | Longitudinal guide for mounting a longitudinally displaceable seat, for example in a motor vehicle |
JP2667516B2 (en) * | 1989-06-19 | 1997-10-27 | 日本トムソン株式会社 | Limited linear motion guide unit |
US5190378A (en) * | 1990-09-27 | 1993-03-02 | Nippon Thompson Co., Ltd. | Linear motion rolling contact guide unit having an asymmetrical guide channel |
JP2919454B1 (en) * | 1998-03-11 | 1999-07-12 | 義久 中村 | Storage guide device for furniture etc. |
US6299357B1 (en) * | 1999-01-20 | 2001-10-09 | Nachi-Fujikoshi Corp. | Clutch bearing for automotive air conditioning compressor |
MXPA01013262A (en) * | 1999-06-22 | 2002-06-21 | Accuride Int Inc | Adjustable detent mechanism for drawer slide. |
TWI233342B (en) * | 2001-10-12 | 2005-06-01 | Accuride Int Inc | Three member thin drawer slide |
CN2599993Y (en) * | 2003-03-08 | 2004-01-21 | 钱文进 | Slideway device of sterilizing cabinet |
CN2655737Y (en) * | 2003-11-11 | 2004-11-17 | 东莞市石龙万通实业有限公司 | Three-step telescopic slide device |
KR20080059697A (en) | 2006-12-26 | 2008-07-01 | (주)세고스 | Slide with means keeping a ball-retainer from derailing |
JP4883788B2 (en) * | 2007-03-28 | 2012-02-22 | シグマ光機株式会社 | Arc slide device |
TWI353821B (en) * | 2008-03-21 | 2011-12-11 | King Slide Works Co Ltd | Slide rail assembly |
KR101021574B1 (en) | 2008-12-31 | 2011-03-17 | (주)세고스 | sliding apparatus |
CN201658034U (en) * | 2010-02-01 | 2010-12-01 | 李绍汉 | Three-segmented drawer guide rail structure |
JP2012126181A (en) * | 2010-12-13 | 2012-07-05 | Shiroki Corp | Slide rail device |
-
2012
- 2012-07-26 KR KR1020120081590A patent/KR101352439B1/en active IP Right Grant
-
2013
- 2013-07-18 WO PCT/KR2013/006408 patent/WO2014017775A1/en active Application Filing
- 2013-07-18 EP EP13822268.2A patent/EP2878227A4/en not_active Withdrawn
- 2013-07-18 US US14/417,555 patent/US20150189990A1/en not_active Abandoned
- 2013-07-18 CN CN201380039546.1A patent/CN104540418B/en active Active
Also Published As
Publication number | Publication date |
---|---|
WO2014017775A1 (en) | 2014-01-30 |
US20150189990A1 (en) | 2015-07-09 |
CN104540418B (en) | 2016-09-07 |
KR101352439B1 (en) | 2014-01-20 |
EP2878227A4 (en) | 2016-03-30 |
CN104540418A (en) | 2015-04-22 |
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