Locating and forced pullout device of a guide rail in a drawer

Abstract

A locating and forced pullout device of a guide rail in a drawer comprises an inner rail, an intermediate rail and an outer rail. The inner rail provides an elongated groove at the rear side thereof and a stop part is disposed in the groove. The stop part has an upward slant toward an end thereof and is joined to the inner groove vertically. The intermediate rail is sliding relative to the inner rail and provides an elastic frame at the rear side thereof with a central frame hole. Also, the elastic frame has a respective upright rim at two opposite lateral sides. The elastic frame can catch the stop part to form a state of locating as soon as the drawer is pushed back and the engaging edge presses the elastic frame. The elastic frame separates from the engaging edge and bounces back to allow the stop part separating from the elastic frame as soon as the drawer is pulled out.

Description

BACKGROUND OF THE INVENTION

[0001] 1. Field of the Invention

[0002] The present invention relates to a locating and forced pullout device of a guide rail in a drawer. In particular, the present invention relates to a locating and forced pullout device, which perform an effective function of locating the drawer after pushing the drawer into place and pulling out the drawer in a forced way.

[0003] 2. Description of Related Art

[0004] Drawers have been popularly used in furniture, office desks, cabinets, and etc. The drawers can contain articles and can be pulled out and pushed into place conveniently so that they can be long lasting and impossible to be replaced.

[0005] Usually, a drawer basically is an open box with a lateral side thereof being joined to a slide rail and the slide rail is in conjunction with an inner wall of a drawer space preserved in the furniture. Hence, as soon as the drawer is pulled, the slide rail moves to allow the drawer being pushed into place or pulled out smoothly. For a larger drawer, there slide rails are utilized, that is, an outer rail encloses an intermediate rail and the intermediate rail encloses an inner rail such that adjacent rails can slide relative to each other to perform the operation of pulling out and pushing into the drawer.

[0006] In fact, when the drawer is pushed into place, it is necessary for the drawer to be located well with a locating device so as not to fall off automatically. If the locating device is provided with excessive tightness or firmness, a greater force has to be exerted while the drawer is pulled out so that the user may not feel smoothly. Hence, how to design a slide rail with a function of excellent locating and forced pullout is a subject pursued by the makers. Especially, it is much harder for the preceding three slide rails.

SUMMARY OF THE INVENTION

[0007] A locating and forced pullout device of a guide rail in a drawer according to the present invention comprises an inner rail, an intermediate rail and an outer rail. The inner rail provides an elongated groove at the rear side thereof and a stop part is disposed in the groove. The stop part has an upward slant toward an end thereof and is joined to the inner groove vertically. The intermediate rail is sliding relative to the inner rail and provides an elastic frame at the rear side thereof with a central frame hole. Also, the elastic frame has a respective upright rim at two opposite lateral sides. The elastic frame can catch the stop part to form a state of locating as soon as the drawer is pushed back and the engaging edge presses the elastic frame. The elastic frame separates from the engaging edge and bounces back to allow the stop part separating from the elastic frame as soon as the drawer is pulled out.

BRIEF DESCRIPTION OF THE DRAWINGS

[0008] The present invention can be more fully understood by reference to the following description and accompanying drawings, in which:

[0009] FIG. 1 is a perspective view of a locating and forced pullout device for a guide rail in a drawer according to the present invention;

[0010] FIG. 2 is a sectional view illustrating the locating and forced pullout device of the present invention in a state of locating; and

[0011] FIG. 3 is a sectional view illustrating the locating and forced pullout device of the present invention in a state of being forced pulling out.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] Referring to FIGS. 1 to 3, basically, a guide rail in a drawer according to the present invention comprises an inner rail 1, an intermediate rail 2 and an outer rail 3.

[0013] Wherein, the inner rail 1 is enclosed before being pulling out and is disposed at the outermost position while it is pulled out. The inner rail 1 at a side thereof (the lower side shown in FIG. 1) has a conventional connection part to be joined to the drawer box and no detail will be described further with regard to the conventional connection part. The inner rail 1 at another side thereof is the invented part, that is, a stop part 12 is mounted to the inner rail 1 on the inner groove 11 thereof. The stop part 12 has a slant arm to perform a function of catching and can be made by way of stamping integrally with the inner rail 1 or another part joined to the inner rail 1.

[0014] The intermediate rail 2 is a slide rail disposed at the middle section of the inner rail 1 and can slide with conventional balls at lateral sides thereof with respect to both of the inner rail 1 and the outer rail 3. This is prior art and no detail will be described further. The intermediate rail 2 has a rise part at an end thereof and the rise part is an elastic frame 21. The elastic frame 21 can be integrated with the intermediate rail 2 or another part provided on the intermediate rail 2. The elastic frame 21 has a central frame hole 211 and at two opposite lateral sides thereof has an upright rim 212 respectively. Both ends of the elastic frame 21 provide chamfer ends and the size of the frame hole 211 is greater than the stop part 12 so that the stop part can be received therein.

[0015] The outer rail 3 covers the intermediate rail 2 and at the front end thereof is stamped a downward V-shaped engaging edge 31. The engaging edge 31 at the center thereof has a rim line 311, which is the lowermost spot thereof, and a rise is formed from the engaging edge 31 toward the front end and the rear end thereof respectively.

[0016] Referring to FIGS. 1 to 3 again, in case of the drawer being pushed backward into place, the inner rail 1 is moved with the drawer to result in the stop part 12 at the front end thereof lifting the elastic frame 21. Then, as soon as the drawer is pushed inward further, the stop part 12 can be inserted into the frame hole 211 of the elastic frame 21 first and then presses downward to enter the outer rail 3 due to being hindered by the engaging edge 31. Once the elastic frame 21 passes through the rim line 311, the drawer becomes in a state of locating and the inner and the intermediate rails 1, 2 are unable to move outward.

[0017] In case of the drawer being pulled out, the drawer box is extracted and the elastic frame 21 may separate from the engaging edge 31 to bounce back such that the it is possible for the stop part 12 to pass over the elastic frame 21 and the drawer box can be pulled out smoothly.

[0018] It is appreciated from the preceding embodiment that the locating and pullout device according to the present invention can offer a much more effective function of locating and pullout than the prior art does.

[0019] While the invention has been described with reference to the preferred embodiment thereof, it is to be understood that modifications or variations may be easily made without departing from the spirit of this invention, which is defined by the appended claims.

Claims

1. A locating and forced pullout device of a guide rail in a drawer, comprising

an inner rail with a rear side, providing an elongated groove at the rear side and a stop part being disposed in the groove, the stop part having an upward slant toward an end thereof and being joined to the inner groove vertically;

an intermediate rail, being sliding relative to the inner rail, providing an elastic frame at a rear side thereof with a central frame hole, having a respective upright rim at two opposite lateral sides thereof with two arched chamfer ends on the respective upright rim, and the frame hole having a size not less than the stop part; and

an outer rail, being sliding with respect to the intermediate rail, providing a downward engaging edge at a rear end thereof;

whereby, the elastic frame can catch the stop part to form a state of locating as soon as the drawer is pushed back and the engaging edge presses the elastic frame; the elastic frame separates from the engaging edge and bounces back to allow the stop part separating from the elastic frame as soon as the drawer is pulled out.

2. The locating and forced pullout device of a guide rail in a drawer according to claim 1, wherein the inner rail, the intermediate rail and outer rail are made of metal.