WO2016167576A1

WO2016167576A1 - Slide unit for drawer

Info

Publication number: WO2016167576A1
Application number: PCT/KR2016/003901
Authority: WO
Inventors: 김덕회; 김성우; 라인숙; 임정규; 김택한
Original assignee: (주)세고스
Priority date: 2015-04-13
Filing date: 2016-04-14
Publication date: 2016-10-20

Abstract

A slide unit for a drawer is disclosed. The present invention provides a slide unit for a drawer, which includes a middle slide rail molded through a simple process to enhance productivity, wherein the middle slide rail has an improved structure to enable each of a body-side fixing rail and a drawer-side fixing rail to more smoothly slide on the middle slide rail.

Description

Slide unit for drawers

The present invention relates to a slide unit for a drawer, and more particularly, the inner rail can be manufactured by a simple process to improve productivity, and the structure of the inner rail can be improved to make the moving rail more smoothly with respect to the inner rail. The present invention relates to a slide unit for a drawer which can not only make the slide moveable but also make the inner rail slide more smoothly with respect to the fixed rail.

Generally, a drawer guide rail member is provided between the main body and the drawer so that the drawer is easily withdrawn or withdrawn from the main body when the user opens and closes the drawer.

Such drawer guide rail members include, for example, two-stage folding and three-stage folding, wherein in the case of three-stage folding, the main body side fixing rail is fixed to the inner surface of the refrigerator inner wall, general furniture, and the like. The fixed rail is fixed to the housing (drawer). In addition, the drawer guide rail member has a plurality of intermediate slide rails disposed between the main body side rail and the drawer side fixed rail, and a plurality of drawer side fixed rails and the middle slide rails. The slide ball is arranged.

However, in the related art, since the intermediate slide rail is molded through a complicated roll forming process, there is a problem of causing an increase in manufacturing cost and a decrease in productivity. In addition, there is a possibility that the plating is not easy to the side portion to cause corrosion, and accordingly also has the disadvantage of deterioration in durability.

Therefore, the present applicant can improve the productivity by molding the intermediate slide rail through a simpler process than the conventional one, and the structure for allowing the main body side rail and the drawer side fixed rail to slide more smoothly with respect to the intermediate slide rail, respectively. It is suggested.

Accordingly, an object of the present invention for solving this problem is to improve the productivity by forming the intermediate slide rail through a simple process, the structure of the intermediate slide rail to improve the structure of the intermediate slide rail body side fixed rail and drawer It is to provide a slide unit for a drawer that can be fixed to the side fixing rails more smoothly.

The present invention for achieving the above object is a fixed rail fixed to the main body and provided with an inner receiving space in one side area, connected to the receiving body to draw or withdraw the housing relative to the main body, with respect to the fixed rail A movable rail provided to be movable in a slide and having an inner accommodating space therein, and an inner rail provided at least partially in the fixed rail and the inner accommodating space of the movable rail to allow the movable rail to slide with respect to the fixed rail; Including, but the inner rail provides a slide unit for a drawer is formed using a rolling method.

In addition, the present invention for achieving the above object is a fixed rail fixed to the main body, connected to the receiving body to draw or withdraw the receiving body with respect to the main body, is provided to be movable slide relative to the fixed rail A moving rail provided with a receiving space, and an inner rail connected to an end of the fixed rail so as to be located in the inner receiving space of the moving rail, the inner rail allowing slide movement of the moving rail with respect to the fixed rail; The rail provides a slide unit for a drawer that is molded using a rolling method.

The inner rail may include a contact portion integrally connected to both ends of the plate and the plate and provided to contact a plurality of slide balls accommodated in the inner receiving space of the fixed rail and the moving rail, respectively. The contact portion is provided with three cloud surfaces spaced apart from each other along the circumferential direction, the cloud surface is curved on both sides of the upper end of the contact portion of the pair of the first cloud surface on which the pair of the first slide ball is seated, Provided is a slide unit for a drawer having a larger diameter than the first cloud surface, and includes a second cloud surface that is curved at the lower end of the first cloud surface in the direction of the housing to roll the second slide ball.

According to the slide unit for drawers of the present invention described above, by forming the inner rail to enable the slide movement of the moving rail with respect to the fixed rail by using a rolling method, it is possible to reduce the manufacturing cost and improve productivity through the simplification of the manufacturing process You can import it.

In addition, since the plating solution can be evenly coated on the entire inner rail surface, it is possible to further prevent corrosion and increase durability.

In addition, by providing a plurality of reinforcing ribs extending in the longitudinal direction and spaced apart from each other in the width direction on the plate of the inner rail, the strength of the inner rail can be increased to further prevent the shape deformation caused by external force. do.

In addition, the contact portion includes at least one groove provided on the plurality of cloud surfaces spaced apart from each other, or at least one cloud protrusion provided on the plurality of cloud surfaces spaced from each other, thereby providing a plurality of slide balls and The cross rolling contact area of the inner rails can be reduced to allow the moving rails to slide more smoothly with respect to the inner rails as well as to allow the inner rails to slide smoothly with respect to the fixed rails.

In addition, the weight of the weight is placed on the enclosure by changing the diameter of the slice ball, which enables the slide movement, and further improves the durability of the inner rail and improves the cloudiness even when a considerable load is applied to the slide unit. have.

1 is a view showing a state in which a slide unit for a drawer according to a first embodiment of the present invention is installed.

2 is a view showing a state in which another example of a fixed rail is applied in FIG.

3 is a perspective view illustrating an inner rail in a slide unit for a drawer according to the first embodiment of the present invention.

4 is a diagram illustrating another example of FIG. 1.

5 is a view showing a state in which a reinforcing rib is provided on the inner rail in the slide unit for a drawer according to the first embodiment of the present invention.

6 is a perspective view showing a state in which reinforcing ribs are provided on an inner rail of a slide unit for a drawer according to the first embodiment of the present invention.

7 is a perspective view showing a state in which a through hole is provided in an inner rail of a slide unit for a drawer according to the first embodiment of the present invention.

8 is a view showing a state in which a plurality of grooves are provided on the cloud surface of the contact portion in the slide unit for a drawer according to the first embodiment of the present invention.

FIG. 9 is a view illustrating a state where a plurality of cloud protrusions are provided on a cloud surface of a contact unit in a slide unit for a drawer according to a first embodiment of the present invention.

10 is a view showing a state in which a slide unit for a drawer according to a second embodiment of the present invention is installed.

11A and 11B are views illustrating a coupling method of a fixed rail and an inner rail in a slide unit for a drawer according to a second embodiment of the present invention.

12 is a view showing a state in which a slide unit for a drawer according to a third embodiment of the present invention is installed.

FIG. 13 is a perspective view illustrating the inner rail of FIG. 12. FIG.

14 and 15 are views showing a state in which another example is applied to the fixed rail of FIG.

16 is a diagram illustrating a state in which an example is applied to the moving rail of FIG. 12.

17 is a diagram illustrating a state in which another example is applied to the moving rail of FIG. 12.

18 is a view showing a modification of the inner rail according to the present invention, FIG. 18A is a perspective view showing a modification of the inner rail described in FIG. 15, and FIGS. 18B and 18C are views of the inner rail described in FIG. 2. It is a perspective view which shows another modified example.

19A and 19B are views showing another modified example of the inner rail shown in FIG. 4.

20 is a diagram illustrating a state in which another example is applied to the moving rail of FIG. 19A.

21 is a diagram illustrating a state in which another example is applied to the moving rail of FIG. 12.

In order to fully understand the present invention, preferred embodiments of the present invention will be described with reference to the accompanying drawings. Embodiment of the present invention may be modified in various forms, the scope of the invention should not be construed as limited to the embodiments described in detail below. This embodiment is provided to more completely explain the present invention to those skilled in the art. Therefore, the shape of the elements in the drawings and the like may be exaggerated to emphasize a more clear description. It should be noted that the same members in each drawing are sometimes shown with the same reference numerals. In addition, detailed descriptions of well-known functions and configurations that are determined to unnecessarily obscure the subject matter of the present invention are omitted.

A slide unit for a drawer (hereinafter referred to as a 'slide unit') according to a preferred embodiment of the present invention is provided to be able to smoothly move the drawer of an electronic product, particularly a drawer type refrigerator or various furnitures in a forward and backward direction.

1 is a view showing a state in which a slide unit for a drawer according to a first embodiment of the present invention is installed, Figure 2 is a view showing a state in which another example of the fixed rail in Figure 1 is applied, Figure 3 is a first view of the present invention 4 is a perspective view illustrating an inner rail in a slide unit for a drawer according to an embodiment, and FIG. 4 is a diagram illustrating another example of FIG. 1.

Hereinafter, the present invention will be described with reference to various embodiments.

As shown in FIG. 1, the slide unit 100 according to the first exemplary embodiment of the present invention includes a fixed rail 110 fixed to the main body 10 and provided with an inner accommodating space 111 in one region. A moving rail which is connected to the housing 20 to slide the housing 20 into or out of the main body 10, is provided to be slidably movable with respect to the fixed rail 110, and the inner receiving space 121 is provided ( 120 and an inner rail 130 provided at least partially in the

inner receiving spaces

111 and 121 of the fixed rail 110 and the moving rail 120 to allow the movable rail 120 to slide relative to the fixed rail 110. , inner rail).

First, the fixing rail 110 may be fixed to various parts such as the inner wall of the refrigerator and the inner wall of the furniture by using a screw or the like. Hereinafter, the fixing rail 110 will be described based on a case provided in the refrigerator for convenience of description.

Specifically, as shown in FIG. 1, the fixed rail 110 has a configuration fixed to the inner wall of the refrigerator, and is integrally connected to the 'U' shape having an inner accommodating space 111. It can be made in the form of a configuration. This fixed rail 110 can be molded using a press process, for example.

However, the present invention is not limited thereto, and as shown in FIG. 2, the fixing rail 110 includes a fixing frame 112 fixed to the main body 10, and fixed to the fixing frame 112 to accommodate the inside in one region. It may also include an auxiliary frame 113 provided with a space (111). In this case, the fixing frame 112 and the auxiliary frame 113 may be fixedly coupled to each other through, for example, spot welding, rivet bonding, screw coupling, or the like.

In this way, the fixed rail 110 can be applied to both the former and the latter configuration, the former case is also reduced compared to the latter case, the number of components is also reduced and no mutual bonding process is required to reduce the manufacturing cost and productivity In consideration of the above, it is more preferable to apply the former case. Hereinafter, the description will be made with reference to the case where the fixed rail 110 is applied to the former structure when describing the configuration.

Next, the moving rail 120 is connected to the housing 20 to draw in or draw out the housing 20, specifically the drawer of the drawer type refrigerator with respect to the main body 10, but slides with respect to the fixed rail 110. It is provided to be movable and the inner accommodating space 121 is provided. The moving rail 120 may be fixedly coupled to the housing 20 by using a separate bracket (not shown).

Next, at least a portion of the inner rail 130 is provided in the

inner receiving spaces

111 and 121 of the fixed rail 110 and the moving rail 120 to enable the slide rail of the moving rail 120 with respect to the fixed rail 110. do.

In an embodiment of the present invention, the inner rail 130 is molded using a rolling method. Rolling means the method of processing the metal material of high temperature or normal temperature through the roller which rotates using metal baking.

Meanwhile, in the related art, a configuration corresponding to the inner rail 130 of the present invention was formed using a roll forming process. Specifically, one plate is roll formed to create a surface contactable with a plurality of slide balls, and then bend both regions. To adopt a structure consisting of two layers in the center.

However, the inner rail manufactured by the conventional roll forming method has a problem in that the plating liquid is hard to be introduced into the micro-gaps in which the two ends are not completely in contact with each other and the two ends are located in the center area. Accordingly, the possibility that corrosion occurs in a portion where the plating solution is not coated increases, and as time passes, the corrosion portion extends to the entire area, which causes a problem that the durability of the entire inner rail decreases rapidly.

In contrast, in the present invention, the inner rail 130 is not only manufactured using a rolling method unlike the conventional art, but also a separate bending process is not required as in the prior art, thereby reducing the manufacturing cost and improving productivity through the simplification of the process. You can import it. In addition, since there is no micro-gap that the two layers contact each other as in the prior art, the plating solution can be evenly coated on the entire inner rail 130 surface, thereby further preventing corrosion and increasing durability.

As shown in FIG. 1 and FIG. 3, the inner rail 130 is provided at both ends of the plate 131 and the plate 131 provided in the outer regions of the fixed rail 110 and the moving rail 120, respectively. It includes a contact portion 132 is integrally connected but provided in contact with the plurality of slide balls 150 accommodated in the inner receiving space (111, 121), respectively.

In an embodiment of the present invention, for example, as shown in FIGS. 1 and 3, the contact portion 132 is provided with three cloud surfaces 133 spaced apart from each other along its circumferential direction, and the cloud surface 133 is It extends along the longitudinal direction L of the contact part 132. That is, three slide balls 150 are provided in the

inner receiving spaces

111 and 121 of the fixed rail 110 and the moving rail 120, respectively, based on the transverse cross-sections of the fixed rail 110 and the moving rail 120. And, the inner rail 130 is in contact with the slide ball 150 to enable the reciprocating slide movement of the moving rail 120. Here, the circumferential direction of the contact portion 132 means the edge circumferential direction of the contact portion 132 on the basis of the transverse cross section of the inner rail 130. On the other hand, when defining the three slide balls 150 as a group, these three slide ball 150 groups are defined in the longitudinal direction of the inner receiving space (111, 121) of the fixed rail 110 and the moving rail 120 It may be provided in plurality.

As another example, as shown in FIG. 4, the contact portion 132 is provided with four cloud surfaces 133 spaced apart from each other along the circumferential direction thereof, and the cloud surface 133 is elongated along the length direction of the contact portion 132. It may be extended. That is, four slide balls 150 are provided in the

inner receiving spaces

111 and 121 of the fixed rail 110 and the moving rail 120, respectively, based on the transverse cross-sections of the fixed rail 110 and the moving rail 120. And, the inner rail 130 is in contact with the slide ball 150 to enable the reciprocating slide movement of the moving rail 120. On the other hand, the fixed rail 110 and the moving rail 120, while preventing the outer separation of the plurality of slide balls 150, the relative slide movement distance of the inner rail 130 relative to the fixed rail 110, the inner rail ( A separate stopper (not shown) is further provided to limit the relative slide moving distance of the moving rail 120 relative to 130.

Hereinafter, for convenience of description, description and illustration will be made based on the case where three cloud surfaces 133 are provided on the contact portion 132.

5 is a view illustrating a state in which a reinforcing rib is provided on an inner rail in a slide unit for a drawer according to the first embodiment of the present invention, and FIG. 6 is a reinforcement on the inner rail of the slide unit for a drawer according to the first embodiment of the present invention. It is a perspective view which shows the state provided with the rib, and FIG. 7 is a perspective view which shows the state in which the through-hole was provided in the inner rail of the slide unit for drawers which concerns on 1st Embodiment of this invention.

In the present invention, as shown in Figures 5 and 6, the plate 131 may be provided to protrude a plurality of reinforcing ribs 134 extending in the longitudinal direction and spaced apart from each other in the width direction. .

Such a plurality of reinforcing ribs 134, the inner rail when the load of the housing 20 acts on the moving rail 120 and the inner rail 130, in particular by a significant load of the article stored in the housing 20 Substantial load is also transmitted to the 130 to further prevent the deformation of the inner rail 130 from occurring (such as bending). In other words, when a deformation of the inner rail 130 occurs due to the load of the housing 20, a smooth slide movement of the housing 20 is limited.

Here, the protruding height D2 of the plurality of reinforcing ribs 134 is a vertical distance between one surface of the plate 131 to which the plurality of reinforcing ribs 134 is connected and an end portion of the contact portion 132 positioned adjacent thereto. It is preferable to form smaller than D1).

If the protruding heights D2 of the plurality of reinforcing ribs 134 are formed to have a predetermined length or more, interference between the reinforcing ribs 134 and the local regions of the moving rails 120 and the fixed rails 110 may occur. There is a problem that the weight of the inner rail 130 also increases.

According to the present invention, by forming the protruding height of the reinforcing rib 134 in the above-described range, it is possible to prevent the interference with the reinforcing rib 134 when the moving rail 120 slides as much as possible, and also to provide a plate ( By reinforcing the strength of the 131, it is possible to further prevent the deformation of the inner rail 130 caused by the load of the housing 20.

As shown in FIG. 7, in the present invention, the plate 131 may be provided with a plurality of through holes 135 spaced apart from each other along its longitudinal direction. The through hole 135 may be formed through a punching process of the press process, and in this case, the weight of the inner rail 130 itself may be reduced, and further, the load of the entire product may be reduced. .

8 is a view showing a state in which a plurality of grooves are provided on the cloud surface of the contact portion in the slide unit for a drawer according to the first embodiment of the present invention, Figure 9 is a slide unit for a drawer according to the first embodiment of the present invention It is a figure which shows the state in which the some cloud protrusion was provided in the cloud surface of a contact part.

In the following. The structure which enables the moving rail 120 to slide more smoothly with respect to the fixed rail 110 is demonstrated.

To this end, for example, as shown in FIG. 8, the contact portion 132 includes at least one groove 136 provided on the plurality of cloud surfaces 133 to be spaced apart from each other. The groove 136 is provided to extend in the longitudinal direction of the plate 131, and when forming the inner rail 130 in a rolling manner, a plurality of grooves 136 may also be formed at the same time. In addition, the plurality of grooves 136 may be formed through a separate grooving process. In addition, the plurality of grooves 136 may be continuously formed from one end to the other end in the longitudinal direction of the plate 131. Although the groove 136 is formed only in a part of the plurality of cloud surfaces 133 in the related drawings, this is for convenience of illustration only and the grooves 136 are all formed on the plurality of cloud surfaces 133.

In the present invention, the at least one groove 136 is provided on the cloud surface 133 of the contact portion 132, and thus the cloud surface 133 of the contact portion 132 is relatively larger than the case where the groove 136 is not provided. The mutual contact area with the plurality of slide balls 150 can be reduced. In addition, when viewed based on a cross section, the contact area between the rolling surface 133 of the contact portion 132 and the plurality of slide balls 150 may be reduced by the width of the at least one groove 136. . Accordingly, the present invention further reduces the mutual contact area between the rolling surface 133 of the contact portion 132 and the plurality of slide balls 150 to move relative slide of the moving rail 120 relative to the inner rail 130. And the frictional force generated between the slide balls 150 and the rolling surface 133 during the slide movement of the inner rail 130 relative to the fixed rail 110 to finally reduce the moving rail 120. The slide can be moved smoothly.

As another example, as shown in FIG. 9, the contact portions 132 are provided on the plurality of cloud surfaces 133 to be spaced apart from each other, and include at least one cloud protrusion 137 protruding from the plurality of cloud surfaces 133. do. The rolling protrusion 137 is provided to extend in the longitudinal direction of the plate 131, and when forming the inner rail 130 in a rolling manner, the plurality of rolling protrusions 137 may be formed at the same time. In addition, the plurality of cloud protrusions 137 may be separately formed and then provided on the cloud surface 133 by welding or the like. In addition, the plurality of cloud protrusions 137 may be continuously formed from one end to the other end in the longitudinal direction of the plate 131. Although the cloud protrusion 137 is formed only in a part of the plurality of cloud surfaces 133 in the related drawings, this is for convenience of illustration only, and the cloud protrusions 137 are all formed on the plurality of cloud surfaces 133. .

In the present invention, at least one cloud protrusion 137 is provided on the cloud surface 133 of the contact portion 132, so that the cloud surface 133 of the contact portion 132 is relatively larger than the case where the cloud protrusion 137 is not provided. ) And the plurality of slide balls 150 can be reduced in mutual contact area. In addition, when viewed based on the cross-section, the plurality of slide balls 150 are in contact with the outer surface of the plurality of projections 137, respectively, without directly contacting the cloud surface 133, the cloud surface 133 It is possible to reduce the mutual contact area as compared with the case of direct contact with. Accordingly, the present invention further reduces the mutual contact area between the contact portion 132 and the plurality of slide balls 150 to allow relative movement of the movable rail 120 relative to the inner rail 130 and the fixed rail 110. The frictional force generated between the plurality of slide balls 150 and the contact portion 132 at the time of the relative slide movement of the inner rail 130 relative to the lateral motion of the inner rail 130 may be reduced so that the moving rail 120 can be slidably moved smoothly. Can be.

10 is a view showing a state in which a slide unit for a drawer according to a second embodiment of the present invention is installed, Figures 11a and 11b is a view of the fixed rail and the inner rail in the slide unit for a drawer according to the second embodiment of the present invention It is a figure which shows a coupling method.

Hereinafter, a slide unit according to a second embodiment of the present invention will be described, and a repetitive description of the same configuration as that of the first embodiment will be omitted, and reference numerals starting with 200 will be used for the same configuration.

As shown in FIG. 10, the slide unit 200 according to the second embodiment of the present invention includes a fixed rail 210 fixed to the main body 10 and an enclosure 20 with respect to the main body 10. A moving rail 220 which is connected to the receiving body 20 to draw in or draw out, is provided to be slidably movable with respect to the fixed rail 210, and an inner accommodating space 221 is provided, and an inner side of the moving rail 220. It includes an inner rail 230 connected to an end of the fixed rail 210 to be located in the receiving space 221 and enabling the slide movement of the moving rail 220 with respect to the fixed rail 210. Here, the inner rail 230 is molded using the rolling method as in the first embodiment.

In the first embodiment of the present invention, the inner accommodating space 111 is provided at one end of the fixed rail 110, whereas in the second embodiment of the present invention, the fixed rail 210 has a cross-sectional shape of approximately 'U'. It is provided to have, and there is a difference in the one end portion is provided toward the inner receiving space 221 direction of the moving rail 220.

In addition, in the second embodiment of the present invention, the inner rail 230 is connected to the end of the fixed rail 210 and the plurality of slide balls 250 positioned in the inner receiving space 221 of the moving rail 220 and The slide movement of the moving rail 220 is enabled while contacting.

That is, in the first embodiment of the present invention, the slide movement is performed between the fixed rail 110 and the inner rail 130, and between the inner rail 130 and the moving rail 120, whereas the second embodiment of the present invention In the embodiment, there is a difference that the slide movement is made only between the inner rail 230 and the moving rail 220.

Here, the inner rail 230 may be applied in the same shape and structure as in the first embodiment, except that the contact portion 232 is integrally connected to only one end of the plate 231.

In the second embodiment of the present invention, for example, as shown in FIG. 11A, the inner rail 230 may be integrally formed at the end of the fixed rail 210 using a welding method.

In addition, as another example, as shown in FIG. 11B, the inner rail 230 may be connected to the end of the fixed rail 210 by using a rivet bonding method. In addition, the inner rail 230 may be connected to the end of the fixed rail 210 by screw coupling.

As such, the slide unit 200 according to the second embodiment of the present invention simplifies the structure of the fixed rail 210 and makes the slide contact only between the inner rail 230 and the moving rail 220, thereby mutually The area of the slide contact portion can be further reduced, thereby reducing the generation of contact friction force generated during the slide movement, thereby allowing the moving rail 220 to slide smoothly.

12 is a view illustrating a state in which a slide unit for a drawer according to a third embodiment of the present invention is installed, FIG. 13 is a perspective view illustrating an inner rail of FIG. 12, and FIG. 14 is a state where another example is applied to the fixing rail of FIG. 12. It is a figure which shows.

In the third embodiment of the present invention, the slide unit for the drawer finds a numerical range for the detailed configuration of the inner rail through a plurality of experiments, and further improves the durability of the inner rail manufactured through the numerical range, Enhancement has the effect.

Hereinafter, in describing the slide unit according to the third embodiment of the present invention, reference is made to FIG. 12, and repeated descriptions of the same components as those of the first embodiment are omitted, and reference numerals beginning with the 300s for the same components are omitted. Let's use.

As shown in FIG. 12, the slide unit 300 according to the third embodiment of the present invention includes a fixed rail 310 fixed to the main body 10 and having an inner accommodating space 311 provided at one side thereof. A moving rail which is connected to the housing 20 to draw in or draw out the housing 20 with respect to the main body 10, is provided to be slidably movable with respect to the fixed rail 310, and an inner receiving space 321 is provided. And an inner rail 330 provided in at least a portion of the inner

accommodating spaces

311 and 321 to allow a sliding movement of the moving rail 320 with respect to the fixed rail 310. Here, the inner rail 330 is molded using a rolling method as in the first embodiment.

In the third embodiment, the shape of the inner rail and the configuration of the rolling surface and the slide ball are different from those of the first and second embodiments, and by this difference, a large weight is stored in the housing 20. Even if a considerable load is applied to the slide unit 300, the slide unit 300 can be smoothly driven and durability can be improved.

In detail, as illustrated in FIG. 13, at least a portion of the inner rail 330 is provided in the inner

accommodating spaces

311 and 321, and the moving rail with respect to the fixed rail 310 by rolling friction of the slide ball 350. A slide movement of the 320 is possible, and the inner rail 330 includes a plate 331 provided at an outer region of the fixed rail 310 and the moving rail 320 and at both ends of the plate 331. Each contact unit 332 extends integrally and is provided in rolling contact with a plurality of slide balls accommodated in the

inner receiving spaces

311 and 321, respectively.

In addition, the contact portion 332 is provided with three cloud surface 333 at the top and bottom, respectively, so as to be spaced apart from each other in the circumferential direction, the cloud surface 333 extends long along the longitudinal direction of the contact portion 332 do. In this case, the cloud surface 333 is curved on both sides of the upper end of the contact portion 332, and a pair of first cloud surfaces 334 on which a pair of first slide balls 351 are seated, and the first cloud surface A second cloud surface 335 having a diameter larger than that of 334, and is curved at the lower end of the first cloud surface 334 in the direction of the receiver 20 to cloud the second slide ball 352. Are distinguished.

In this case, referring again to FIG. 12, three slide balls 350 are provided in the inner

accommodating spaces

311 and 321, respectively, based on the transverse cross-sections of the fixed rail 310 and the moving rail 320. The slide ball 350 has a first slide ball 351 in contact with the first rolling surface 334, and a material having a larger diameter than the first slide ball 351 and in contact with the second rolling surface 335. It can be divided into two slide balls (352).

The first slide ball 351 has a diameter slightly smaller than the diameter of the first cloud surface 334, and likewise, the second slide ball 352 has a diameter slightly smaller than the diameter of the second cloud surface 335. Is formed. If the slide ball 350 is the same as the diameter of the rolling surface 333, the contact area is increased during the rolling motion, so the friction force rises, so that the slide can not be smoothly expected, the diameter of the slide ball 350 is in contact with the rolling surface 333 It can be adjusted within an appropriate numerical range to form smaller than the diameter of).

On the other hand, as shown in FIG. 14, when a heavy object is accommodated in the housing 20, a rotational force A and a load B of the object in the clockwise direction are simultaneously applied to the slide unit 300. It is transmitted, the rotational force (A) and the load (B) is more sensitive to the moving rail 320 is more sliding movement than the fixed rail 310 is fixed to the body 10.

In this case, the load B is uniformly distributed on the pair of first slide balls 351 to apply pressure, and the rotational force A is a contact point between the first slide ball 351 and the moving rail 320. Pressure is applied to the second slide ball 352 with P as the axis. The pressure due to the rotational force A increases the pressure applied to the second slide ball 352 as compared to the pressure applied to the first slide ball 351 as the load of the stored object increases. Therefore, if the rotational force A is not evenly distributed, there is a problem that the second slide ball 352 may be worn or damaged so that durability of the entire moving rail 320 may be significantly degraded.

Accordingly, the second slide ball 352 and the second rolling surface 335 are larger in diameter than the first slide ball 351 and the first rolling surface 334, so that the second slide ball 352 is formed. Since the contact area of the cloud is widened, the pressure by the rotational force (A) can be absorbed uniformly. In particular, the uniform absorption of the rotation force (A) is made highly efficient during the slide movement of the moving rail (320).

In addition, the pair of first slide balls 351 are formed with the same diameter, there is an effect that can achieve a uniform load distribution with respect to the static load (B) when there is no movement of the moving rail (320).

In this case, as shown in FIG. 15, the distance T1 of the first slide ball 351 is smaller than the radius of the second slide ball 352 based on the vertical center line C1 of the inner rail 330. Equal or longer, and as described above, the radius of the second slide ball 352 is preferably set equal to or greater than the radius of the first slide ball 351.

Specifically, the radius of the first slide ball 351 is R1, the radius of the second slide ball 352 is R2, the first slide ball 351 on the basis of the longitudinal center line C1 of the inner rail 330. When the distance of is assumed to be T1, R1≤R2≤T1 is set.

In this case, R2 ≦ T1. When the radius R2 of the second slide ball 352 is set larger than the distance T1, the center of the second slide ball 352 is the inner side of the inner rail 330. Since it is biased toward the eccentric, it solves the problem which becomes weak with respect to the rotational force (A) and the static load (B). Accordingly, there is a problem that the durability of the moving rail 320 may be significantly deteriorated or the second slide ball 352 may be separated.

As illustrated in FIG. 16, when a point having the same distance from the center of the three slide balls 350 in the inner rail 330 is defined as a center point C2, the second slide ball at the center point C2 is defined. It is preferable that the angle E between the 352 and the center of the first slide ball 351 close to the second slide ball 352 is set to 90 ° or more.

In addition, it is preferable that the angle E is set to an angle at which the pair of first slide balls 351 does not contact each other. In detail, the angle E is set to an angle greater than or equal to zero where the distance T2 of the pair of first slide balls 351 does not become zero.

In this case, as shown in FIG. 17, when the angle E is set to a value of 90 ° or less, the distance T3 at the lower end of the first slide ball 351 and the upper end of the second slide ball 352. Becomes narrow, and the width T4 of the moving rail 320 is relatively increased compared to the distance T3. Accordingly, the moving rail 320 has a problem in that durability of the slide ball 350 decreases due to a decrease in the area to withstand the rotational force (A) and rapid wear of the slide ball 350.

18A, 18B, and 18C show the inner rail 330 in the slide unit 300 provided with the above-described first slide ball 351 and the second slide ball 352 having a larger diameter than the first slide ball 351. Is a perspective view illustrating various modification examples of

The inner rail 330 in FIG. 18A has a form in which one end 337 without the slide ball 350 is increased in thickness. In detail, in the inner rail 330 of FIG. 17, an end without the slide ball 350 is formed in a diagonal direction, whereas the end 337 having a predetermined thickness protrudes in a substantially rectangular shape. Accordingly, durability of the inner rail 330 may be improved and weight reduction of the inner rail 330 may be realized.

The inner rail 330 in FIGS. 18B and 18C illustrates another modified example of the inner rail described in FIG. 2, and has an upper and lower symmetrical shape.

In this case, in FIG. 18B, the plate 331 of the inner rail 330 is formed with a semicircular recessed surface 336 between the upper and lower second slide balls 352.

In addition, the end 322 of the moving rail 320 is bent to contact and wrap the second slide ball 352 to prevent the separation of the second slide ball 352, the end 322 is a heavy storage Even in the clockwise rotational force A (see FIG. 14) by the housing 20 in which water is stored, contact with the inner rail 330 may be prevented.

In addition, the depression surface 336 also has the effect of reducing the weight of the inner rail 330.

Inner rail 330 in FIG. 18C has a sliding surface 338 unlike the recessed surface 336. The slide surface 338 is formed in parallel with the second slide ball 352 provided on the upper and lower parts. In this case, as described above, the separation of the second slide ball 352 is prevented by the end 322 of the moving rail 320 and the end 322 of the moving rail 320 contacts the inner rail 330. Can be prevented. In addition, the simple construction of the inner rail 330 has the effect that the production is easy and easy to assemble.

19A and 19B are perspective views showing another modified example of the inner rail shown in FIG. 4.

In FIG. 19A, the inner rail 330 has a shape in which the top and the bottom thereof are symmetrical, and the contact portions 332 provided to be in rolling contact with the four slide balls 350 respectively are disposed between the slide balls 350. A recessed recessed piece 339 may be formed to reduce the inner rail 330.

In addition, the end 322 of the moving rail 320 is bent to prevent the slide ball 350 from being separated.

In addition, in FIG. 19B, the inner rail 330 is bent such that the plate 331 has an elastic force in a direction opposite to the housing 20.

Accordingly, the end 322 of the moving rail 320 does not contact the inner rail 330 by the load of the housing 20, and is applied to the slide unit 300 by the bent shape of the plate 331. The resistance can increase the durability against the rotation force (A) and the load (B) of the object.

In detail, a considerable load is also transmitted to the inner rail 330 by a considerable load of the article stored in the housing 20, and in this case, when the deformation of the inner rail 330 occurs due to the load of the housing 20, the housing is accommodated. There is a problem that the smooth slide movement of the sieve 20 is limited, the plate 331 is bent in the opposite direction of the housing 20, the shape deformation (bending, etc.) of the inner rail 330 is It can prevent further occurrence.

20 is a view illustrating a state in which another example is applied to the moving rails of FIGS. 19A and 19B.

As shown in FIG. 20, the width in the horizontal direction (drawing direction) of the moving rail 320 provided with the four slide balls 350 is defined as T5, and the length in the longitudinal direction is defined as T6. In addition, the illustrated longitudinal T5 is the same as the transverse width T5 of the moving rail 320, and is shown for comparison with T6.

In addition, the center point (C3) of the inner rail 330 is defined as the center of T5 on the horizontal axis, and the center of T5 on the vertical axis, and when the straight line with each slide ball 350 at the center point (C3) is shown The angles formed at are defined as θ1 and θ2, respectively, and the angles formed at the left and right sides may be defined as θ3 and θ4, respectively.

In this case, as a result, when the angles of θ3 and θ4 have the same value and θ1 has a value equal to or greater than θ2, that is, θ1> = θ2 and θ3 = θ4, the shape deformation of the inner rail 330 ( Bending, etc.) can be minimized. In the case of θ3 = θ4, it means that the height positions of the pair of slide balls 350 provided on the lower side are the same.

In addition, when all angles are the same as θ1 = θ2, it was confirmed that the durability is the highest by dispersing the stress to support the load and the rotational force of the housing 20.

In addition, the value of T6 is equal to or greater than T5, but preferably has a value less than twice T5. In this case, as the value of T6 increases, the value of θ2 decreases and the value of θ4 increases. As the value of θ2 decreases, the length of the inner rail 330 becomes longer, and the resistance to static load may be good. However, there is a problem that the resistance to rotational force is weak when the slide movement of the housing 20.

As shown in FIG. 20, the width in the horizontal direction (drawing direction) of the moving rail 320 provided with the three slide balls 350 is defined as T5, and the length in the longitudinal direction is defined as T6. In addition, the illustrated longitudinal T5 is the same as the transverse width T5 of the moving rail 320, and is shown for comparison with T6.

In addition, the center point (C3) of the inner rail 330 is defined as the center of T5 on the horizontal axis, and the center of T5 on the vertical axis, and when the straight line with each slide ball 350 at the center point (C3) is shown The angle formed at may be defined as θ 1, and the angle formed at the right may be defined as θ 4.

As in the case of FIG. 20, the value of T6 is equal to or larger than T5, but preferably has a value less than twice T5. In this case, as the value of T6 increases, the value of θ4 increases. As the value of θ4 increases, the length of the inner rail 330 increases, and the resistance to static load may be good, but the housing 20 There is a problem that the resistance to the rotational force is weak when the slide movement.

Embodiments of the slide unit for a drawer of the present invention described above is merely illustrative, and those skilled in the art to which the present invention pertains that various modifications and equivalent other embodiments are possible. You will know. Therefore, it will be understood that the present invention is not limited to the forms mentioned in the above detailed description. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims. It is also to be understood that the present invention includes all modifications, equivalents, and substitutes within the spirit and scope of the invention as defined by the appended claims.

10: body 20: housing

100: slide unit 110: fixed rail

111: inner receiving space 112: fixed frame

113: auxiliary frame 120: moving rail

121: inner receiving space 130: inner rail

131: plate 132: contact portion

133: cloud side 134: reinforcement rib

135: through hole 136: groove

137: cloud projection 150: slide ball

300: slide unit 310: fixed rail

320: moving rail 321: inner receiving space

322: end 330: inner rail

331: plate 332: contact portion

333: cloud surface 334: first cloud surface

335: second cloud side 336: depression

337 end 338 sliding surface

339: depression 350: slide ball

351: first slide ball 352: second slide ball

Claims

A fixed rail fixed to the main body and having an inner accommodation space at one side thereof;

A moving rail connected to the housing so as to draw or withdraw the housing relative to the main body, the movable rail being slidably movable with respect to the fixed rail and having an inner accommodation space; And

And an inner rail provided in at least a portion of an inner accommodating space of the fixed rail and the movable rail to allow a slide movement of the movable rail with respect to the fixed rail.

The inner rail is a slide unit for a drawer is formed using a rolling method.
The method of claim 1,

The inner rail is

plate; And

And a contact portion integrally connected to both ends of the plate and provided to contact a plurality of slide balls accommodated in the inner receiving space of the fixed rail and the moving rail, respectively.
The method of claim 2,

The contact portion is provided with three to four cloud surfaces spaced apart from each other in the circumferential direction, the cloud surface is a slide unit for a drawer, characterized in that extending in the longitudinal direction of the contact portion.
The method of claim 2,

And a plurality of reinforcing ribs extending along the longitudinal direction of the plate and spaced apart from each other along the width direction of the plate to protrude from one surface thereof.
The method of claim 4, wherein

And a protruding height of the plurality of reinforcing ribs is smaller than a vertical distance between one surface of the plate to which the plurality of reinforcing ribs is connected and an end portion of the contact portion positioned adjacent thereto.
The method of claim 2,

The plate is a slide unit for a drawer, characterized in that a plurality of through-holes are provided to be spaced apart from each other along the longitudinal direction.
The method of claim 2,

The contact unit includes at least one groove provided on the plurality of cloud surfaces spaced apart from each other, wherein the groove is provided to extend in the longitudinal direction of the plate slide unit.
The method of claim 2,

The contact unit includes at least one cloud protrusion provided on the plurality of cloud surfaces spaced apart from each other, wherein the cloud protrusion is provided to extend in the longitudinal direction of the plate.
The method of claim 1,

The fixed rail,

A fixed frame fixed to the main body; And

And an auxiliary frame which is fixed to the fixing frame and has an inner accommodation space in one region thereof.
A fixed rail fixed to the main body;

A moving rail connected to the housing so as to draw or withdraw the housing relative to the main body, the movable rail being slidably movable with respect to the fixed rail and having an inner accommodation space; And

And an inner rail connected to an end of the fixed rail so as to be located in an inner receiving space of the moving rail and allowing slide movement of the moving rail with respect to the fixed rail.

The inner rail is a slide unit for a drawer is formed using a rolling method.
The method of claim 10,

The inner rail is

plate; And

And a contact portion integrally connected to one end of the plate and provided to contact a plurality of slide balls accommodated in the inner receiving space of the moving rail.
The method of claim 11,

The contact portion is provided with three to four cloud surfaces spaced apart from each other in the circumferential direction, the cloud surface is a slide unit for a drawer, characterized in that extending in the longitudinal direction of the contact portion.
The method of claim 11,

And a plurality of reinforcing ribs extending along the longitudinal direction of the plate and spaced apart from each other along the width direction of the plate to protrude from one surface thereof.
The method of claim 13,

And a protrusion height of the plurality of reinforcing ribs is smaller than a vertical distance between one surface of the plate to which the plurality of reinforcing ribs is connected and an end portion of the contact portion positioned adjacent thereto.
The method of claim 11,

The plate is a slide unit for a drawer, characterized in that a plurality of through-holes are provided to be spaced apart from each other along the longitudinal direction.
The method of claim 11,

The contact unit includes at least one groove provided on the plurality of cloud surfaces spaced apart from each other, wherein the groove is provided to extend in the longitudinal direction of the plate slide unit.
The method of claim 11,

The contact unit includes at least one cloud protrusion provided on the plurality of cloud surfaces spaced apart from each other, wherein the cloud protrusion is provided to extend in the longitudinal direction of the plate.
The method of claim 10,

The inner rail is a slide unit for a drawer, characterized in that formed integrally with the end of the fixed rail.
The method of claim 10,

The inner rail is a slide unit for a drawer, characterized in that the lock is connected to the end of the fixed rail.
The method according to claim 2 or 11, wherein

The contact portion is provided with three cloud surface 333 spaced apart from each other along the circumferential direction,

The cloud surface 333 is curved on both sides of the upper end of the contact portion, and a pair of first cloud surface 334 on which a pair of first slide balls 351 are seated, and the first cloud surface 334. Slide unit for a drawer having a large diameter, including a second rolling surface 335 is curved at the lower end of the first rolling surface 334 in the direction of the housing 20, the second slide ball 352 is rolling motion .
The method of claim 20,

The pair of first slide balls 351 has a diameter smaller than the diameter of the first cloud surface 334, and the second slide ball 352 has a diameter smaller than the diameter of the second cloud surface 335. And

The pair of first slide balls (351) have the same diameter, the second slide ball (352) is a slide unit for a drawer, characterized in that the diameter is larger than the first slide ball (351).
The method of claim 20,

When defining a point having the same distance from the pair of first slide ball 351 and the second slide ball 352 as the center point (C),

An angle E between the second slide ball 352 and the center of the first slide ball 351 close to the second slide ball 352 at the center point A is

A slide unit for a drawer, characterized in that it is equal to or greater than 90 ° and less than an angle at which the pair of first slide balls 351 do not touch each other.
The method according to claim 2 or 11, wherein

The contact portion,

Four cloud surfaces 333 are provided to be spaced apart from each other along the circumferential direction, and the cloud surfaces 333 are curved on both upper and lower ends of the contact portion, and the four slide balls 350 are seated. 4 cloud planes,

When defining the width of the transverse direction of the moving rail provided with the four slide balls 350 as T5 and the length in the longitudinal direction as T6, the value of T6 is equal to or greater than T5, but less than twice T5. Has the value of,

When the center of the inner rail 330 and the center of T5 and the center of T5 vertically defined as the center point (C3), when the straight line with each slide ball 350 at the center point (C3) When the angles formed on the upper and lower sides are defined as θ1 and θ2, respectively, and the angles formed on the left and right sides are defined as θ3 and θ4, respectively.

θ1 is greater than or equal to θ2, and θ3 is equal to θ4.
The method according to claim 2 or 11, wherein

The contact portion,

Three cloud surfaces 333 are provided to be spaced apart from each other along the circumferential direction, and the cloud surfaces 333 are curved at both sides of the upper end and one side of the lower end of the contact portion, and the three slide balls 350 are seated. Three cloud planes,

When defining the width in the horizontal direction of the moving rail provided with the three slide balls 350 as T5 and the length in the longitudinal direction as T6, the value of T6 is equal to or greater than T5, but twice the T5. A drawer slide unit having the following values.