CN101219018B - Sliding rail - Google Patents

Abstract

A slide rail comprises a first rail, a second rail and a third rail, the three rails respectively include two side arms, the first rail includes a fixing plate, the two side arms of the first rail Bending from both ends of the fixing plate respectively, the second rail is accommodated in the accommodation space formed by the two side arms of the first rail and the fixing plate, and the two side arms of the second rail are partly extended out of the receiving space formed by the two side arms of the first rail and the fixing plate, and are respectively connected with the two side arms of the third rail by the protruding parts. The side arms of the second rail of the slide rail protrude from the accommodation space formed by the two side arms of the first rail and the fixed plate to connect with the third rail, which effectively increases the distance between the three rail bodies. There is sufficient space for the installation of other structures on the rail body.

Description

slide rail

technical field

The invention relates to a slide rail, in particular to a slide rail with relatively large space left between adjacent rail bodies.

technical background

According to the needs of the actual situation, drawer slides are divided into two types: ball slides and ballless slides. The ball slide rail is easy to push and pull, but the cost is relatively high, and components such as the ball frame are easily damaged, so that the ball slide rail cannot continue to be used. So relatively speaking, the cost of ballless slides is lower. Under normal circumstances, the cross-sectional shape of the three-section slide rail is mostly a three-layer telescopic installation method in which the outer rail is sleeved on the middle rail, and the middle rail is sleeved on the inner rail. This structure is conducive to the installation and fixing of the slide rail. . However, in order to prevent accidental sliding or falling off of the rail body, a positioning device for locking the corresponding rail body is generally installed between the rail bodies of the three-section slide rail. Only when the positioning device is in the unlocked state, the corresponding rail body can Do stretch or retract slides. Due to the relatively small distance between the three rail bodies, there is usually not enough space for the positioning device in the above-mentioned slide rails.

Contents of the invention

In view of the above, it is necessary to provide a slide rail with proper installation space left between the rail bodies.

A slide rail comprises a first rail, a second rail and a third rail, the three rails respectively include two side arms, the first rail includes a fixing plate, the two side arms of the first rail Bending from both ends of the fixing plate respectively, the second rail is accommodated in the accommodation space formed by the two side arms of the first rail and the fixing plate, and the two side arms of the second rail are partly extended out of the receiving space formed by the two side arms of the first rail and the fixing plate, and are respectively connected with the two side arms of the third rail by the protruding parts.

Compared with the prior art, the side arm part of the second rail of the slide rail protrudes out of the accommodation space formed by the two side arms of the first rail and the fixed plate to connect with the third rail, effectively increasing the The space between the three rails leaves sufficient space for the installation of other structures on the rails.

Description of drawings

Fig. 1 is an exploded perspective view of a preferred embodiment of the slide rail of the present invention.

Fig. 2 is a three-dimensional assembled view of a preferred embodiment of the slide rail of the present invention.

Fig. 3 is a cross-sectional view of a preferred embodiment of the slide rail of the present invention.

Detailed ways

Referring to Fig. 1 and Fig. 2, it is a preferred embodiment of the slide rail of the present invention, which includes a first rail 20, a second rail 40, a third rail 60 and at least one positioning device between rail bodies, the first rail 20 can be fixed on a fixed object, such as a cabinet or a cabinet, and the third rail 60 is fixed on a side wall of a drawer or a server, and the second rail 40 is accommodated between the first rail 20 and the third rail 60, passing through the adjacent The rails between the rail bodies, the second rail 40 and the third rail 60 can slide relative to the first rail 20 in the stretching or retracting direction, so as to pull the drawer/server out or push it into the cabinet/cabinet. The positioning device is arranged between adjacent rail bodies to prevent accidental sliding of the corresponding rail body. Only when the positioning device is in an unlocked state, the corresponding rail body can be stretched or retracted to slide.

Please also refer to FIG. 3 , the first rail 20 includes a fixed plate 22 , an upper arm 24 and a lower arm 26 , the fixed plate 22 is a vertical plate body, and the upper arm 24 and the lower arm 26 extend from the upper and lower ends of the fixed plate 22 respectively. Bend symmetrically in the same direction. The upper arm 24 is arc-shaped, and its arm end 242 is finally folded back to a direction parallel to the fixing plate 22 . The inner side of the upper arm 24 forms an upper slideway 244 whose main body is arc-shaped. The lower arm 26 is arc-shaped, and its arm end 262 is finally folded upwards to a direction parallel to the fixing plate 22 . The inner side of the lower arm 26 forms an arc-shaped slideway 264 .

The second rail 40 includes a web 42 , an upper arm 44 and a lower arm 46 . The web 42 includes vertical two ends 422 and an offset protrusion 424 , the protrusion 424 is parallel to the two ends 422 and connected between the two ends 422 through two inclined surfaces 426 . The upper arm 44 and the lower arm 46 are respectively bent from the two ends of the web 42, so that the upper arm 44 and the lower arm 46 have a symmetrical structure, and the specific shape of the lower arm 46 is only described here as an example. The lower arm 46 includes a second bent portion 462 , a first bent portion 464 and a vertical portion 466 connected between the two bent portions 462 , 464 . The vertical portion 466 is parallel to the end portion 422 of the web 42 and is spaced far from the end portion 422 much smaller than the offset distance between the protruding portion 424 relative to the end portion 422 . The second bending part 462 is bent and connected between the end part 422 and the vertical part 466. The outer wall of the second bending part 462 forms a first slideway 468. The curvature radius of each point on the first slideway 468 is the same as that of the first slideway 468. The radius of curvature corresponding to each point on the glideway 264 of the rail 20 is the same. When the second rail 40 is accommodated in the first rail 20, the first slideway 468 of the second rail 40 can be accommodated and attached to the slideway of the first rail 20. 264, so that the glideway 264 supports the first slideway 468 in the form of curved surface contact, which is beneficial to enhance the load capacity of the first rail 20 to the second rail 40. When the second rail 40 slides relative to the first rail 20 , the first slideway 468 slides along the glideway 264 . The first bending portion 464 is bent from the other end of the vertical portion 466 to a direction away from the protruding portion 424 , and a sidewall of the first bending portion 464 farther from the protruding portion 424 forms a second slideway 470 . The upper arm 44 and the lower arm 46 are symmetrical structures, which include a second bending portion 442, a first bending portion 444, a vertical portion 446, a first slideway 448 and a first Two slides 450. Wherein, the radius of curvature of each point on the first slideway 448 is the same as the radius of curvature of each point on the upper slideway 244 of the first rail 20. The slideway 448 is accommodated and attached to the upper slideway 244 of the first rail 20 , and the two are in curved surface contact.

The third rail 60 includes a mounting plate 62 , an upper arm 64 and a lower arm 66 , the mounting plate 62 is a vertical plate body, and the upper arm 64 and the lower arm 66 are bent symmetrically from two ends of the mounting plate 62 respectively. The upper arm 64 includes a bent portion 642, a straight portion 644 and a free end 646. The bent portion 642 is arc-shaped and connected between the upper end of the mounting plate 62 and the straight portion 644, and the straight portion 644 bends by itself. The bent portion 642 extends obliquely downward, and the free end 646 is folded back from the straight portion 644 toward the inner side of the bent portion 642 and extends parallel to the straight portion 644. The outer wall at the junction of the free end 646 and the straight portion 644 A slideway 648 is formed by bending. The radius of curvature of each point on the slideway 648 is the same as that of the corresponding points on the second slideway 450 of the second rail 40. When the third rail 60 partially accommodates the second rail 40, the slideway 648 of the third rail 60 The second sliding track 450 is accommodated and attached to the second rail 20 so that the second sliding track 450 supports the sliding track 648 in a form of curved surface contact, which is beneficial to enhance the supporting ability of the second rail 40 to the third rail 60 . As the third rail 60 slides relative to the second rail 40 , the slideway 648 slides along the second slideway 450 . The lower arm 66 is symmetrical to the upper arm 64 , and includes a bent portion 662 , a straight portion 664 , a free end 666 and a slideway 668 which are symmetrical to the upper arm 64 . Wherein, the radius of curvature of each point on the slideway 668 is the same as that of the corresponding points on the second slideway 470 of the second rail 40, when the third rail 60 partially accommodates the second rail 40, the slide of the third rail 60 The track 668 is accommodated and attached to the second sliding track 470 of the second rail 20 , and the two are in curved surface contact.

When assembling, it is only necessary to insert the second rail 40 into the first rail 20, and its second bending parts 442, 462 are respectively accommodated in the upper arm 24 and the lower arm 26 of the first rail 20, and the two first slideways 448, 468 They are respectively in contact with the upper slideway 244 and the lower slideway 264 of the first rail 20 with a curved surface, and slide relative to each other. An installation space is formed between the protruding portion 424 of the second rail 40 , the two inclined surfaces 426 and the fixing plate 22 of the first rail 20 , which can be used for installing the rail positioning device. The third rail 60 is sleeved on the first bending portions 444, 464 of the second rail 40, and the slideways 648, 668 of the third rail 60 are respectively in contact with the second slideways 450, 470 of the second rail 40, And slide relatively. There is a certain distance between the installation plate 62 of the third rail 60 and the protrusion 424 of the second rail 40 for installing the rail body positioning device.

The first bending portion 444,464 of the second rail 40 of the slide rail of the present invention bends and stretches out the upper arm 24 of the first rail 20, and the receiving space formed by the lower arm 26 and the fixing plate 22 is finally partially accommodated in the third rail. In the receiving space formed by the upper arm 64, the lower arm 66 and the mounting plate 62 of the rail 60, the protruding portion 424 of the second rail 40 can have a larger offset distance relative to the two ends 422, and the protruding portion 424 and A larger installation space is left between the fixing plate 22 of the first rail 20 and the mounting plate 62 of the third rail 60, so as to facilitate the installation of the positioning devices of each rail body.

Certainly, the slideway of each rail body of the present invention can be other shapes equally, as plane slideway etc., and the contact of slideway between adjacent rail bodies also can be other contact modes, as the radius of curvature of accommodated slideway is less than accommodated slideway The radius of curvature, and the contact between the two slideways formed is line-surface contact, etc. As long as a part of the upper arm 44 and the lower arm 46 of the second rail 40 extends out of the receiving space formed by the upper arm 24, the lower arm 26 and the fixed plate 22 of the first rail 20 respectively, and is connected with the third rail 60 with the protruding part, It is enough to ensure that there is a large installation space between the first rail 20 and the second rail 40 and between the second rail 40 and the third rail 60 .

In addition, in order to reduce the relative sliding friction between different rail bodies, an appropriate amount of lubricating oil can be added to the slideway of the rail body or the smoothness of the slideway can be increased to facilitate the relative sliding between the rail bodies. A ball rack including several balls may also be installed between the first rail 20 and the second rail 40 to assist the sliding of the second rail 40 relative to the first rail 20 .

Claims (7)

1. slide rail, comprise one first rail, one second rail and one the 3rd rail, described three rails comprise two side arms respectively, described first rail comprises a fixed head, the two side arms of described first rail is respectively from the bending of the two ends of described fixed head, described second rail is contained in the two side arms and the formed receiving space of fixed head of described first rail, it is characterized in that: the two side arms of described second rail is partly stretched out the two side arms and the formed receiving space of fixed head of described first rail respectively, and be connected with the two side arms of the 3rd rail respectively with extension, the relative slip with the curved surface contact of the corresponding side arm of described extension and described the 3rd rail, described extension are first kink that the end of the two side arms of described second rail also outwards is bent to form to the side arm direction of the first nearer rail.

2. slide rail as claimed in claim 1 is characterized in that: described the 3rd rail comprises a decorating plate, and the extension of the two side arms of described second rail is contained in the two side arms and the formed receiving space of decorating plate of described the 3rd rail.

3. slide rail as claimed in claim 2, it is characterized in that: described second rail also comprises a web, the two side arms of described second rail is bent to form one second kink respectively from the two ends of described web, the two side arms inboard of described first rail forms a slideway respectively, the corresponding slideway of described first rail is accommodated and fitted in to second kink of described second rail respectively, and can be in wherein sliding.

4. slide rail as claimed in claim 3 is characterized in that: the two side arms of described the 3rd rail is bent to form a slideway respectively, and the slideway of described the 3rd rail is accommodated respectively and fitted in correspondence first kink of described second rail, and can be in wherein sliding.

5. slide rail as claimed in claim 4 is characterized in that: the two side arms of described second rail also comprises a vertical portion respectively, and first kink of each side arm of described second rail is connected with described vertical portion with second kink.

6. slide rail as claimed in claim 4, it is characterized in that: the two side arms of described the 3rd rail comprises a kink, a flat part and a free end respectively, the two ends of the decorating plate that is connected in described the 3rd rail that described kink is curved respectively, described flat part is the oblique extension of self-corresponding kink respectively, the self-corresponding respectively flat part of described free end is to turning back near the direction of corresponding kink inboard and being parallel to described flat part, and the slideway of described the 3rd rail is respectively the 3rd rail outer wall bending of described free end and described flat part junction and forms.

7. slide rail as claimed in claim 3 is characterized in that: the web of described second rail comprises two vertical ends and Parallel offset in a protuberance at both ends, and described protuberance is connected between the described both ends by two inclined planes.