A drawer pre-tightening force slide rail

Abstract

A drawer pre-tightening force slide rail, which comprises an outer rail and a middle rail assembly. The outer rail includes a chute. The middle rail assembly includes a slider, a pressing member, and a pre-tightening spring. The slider includes a body, a sliding insert block, and a receiving groove. The receiving groove is provided on the body and the sliding insert block. The pressing member is received in the receiving groove and includes a pressing portion and a fixing portion. The pre-tightening spring abuts between the pressing portion and the inside of the receiving groove to drive the pressing portion of the pressing member to abut against the chute. In this drawer pre-tightening force slide rail, a pre-tightening spring is provided between the pressing member and the slider, so that the pressing member always abuts in the chute, thereby compensating for the loss of the contact surface caused by friction between the slider and the outer rail. Furthermore, the slider can always tightly abut against the outer rail, achieving the purpose of eliminating the gap.

Description

Technical Field

[0001] The invention relates to the technical field of drawer slide rails, and in particular to a drawer pre-tightening force slide rail. Background Art

[0002] In people's lives, drawer slides are used in many places, such as drawers and sliding doors. These products need to return to their original positions after being pulled open. Therefore, for some sliding slides, the drawer slides will cause particularly large wear during the back and forth sliding process. Especially after years of use, the sliding surface will be greatly worn, resulting in gaps, which will cause the drawer to deform when pulled out, and even cause the drawer to be pulled out and not smoothly. In addition, due to the manufacturing process, the assembled slides will cause the drawer to shake left and right due to the accumulation of tolerances, which will affect the user experience of the drawer. Summary of the invention

[0003] In view of this, the present invention provides a drawer preload slide rail which can avoid the above-mentioned problems.

[0004] A drawer preload slide rail, comprising an outer rail and a middle rail assembly arranged in the outer rail. The outer rail comprises a slide groove. The middle rail assembly comprises a slider arranged in the slide groove, at least two abutting members arranged on the slider, and a preload spring arranged between the abutting member and the slider. The slider comprises a body, two sliding blocks respectively arranged on both sides of the body, and at least two receiving grooves for accommodating the abutting members. The contour of the sliding block in the sliding direction perpendicular to the slide groove is an isosceles triangle. The receiving groove is arranged on the body and the sliding block. The abutting member is accommodated in the receiving groove and comprises an abutting top portion abutting in the slide groove, and a fixing portion arranged in the receiving groove. The preload spring abuts against the abutting top portion and the receiving groove to drive the abutting top portion of the abutting member to push against the slide groove.

[0005] Furthermore, the slide groove includes a accommodating cavity and two guide grooves respectively arranged on both sides of the accommodating cavity. The guide groove is symmetrically arranged on a cross section perpendicular to the sliding direction of the slide groove and the outline of the guide groove is an isosceles triangle. The sliding plug is inserted in the guide groove, and the isosceles triangle of the guide groove and the isosceles triangle of the sliding plug.

[0006] Furthermore, the straight lines on which the heights of the isosceles triangles of the two guide grooves lie coincide with each other.

[0007] Furthermore, the body of the slider is accommodated in the accommodating cavity.

[0008] Further, the receiving groove includes a receiving cavity provided on the body, a butting groove provided on the sliding plug, and a clamping groove provided on one side of the receiving cavity facing the butting groove.

[0009] Further, the butting top is received in the butting groove, and in a cross-section perpendicular to the sliding direction of the sliding groove, the contour of the butting top is half of the isosceles triangle along its height.

[0010] Further, the fixing portion further includes a semi-circular groove, a semi-circular groove is formed on the receiving cavity, the pre-tightening spring is received in the space formed by the two semi-circular grooves, and the pre-tightening spring abuts between the butting top and the receiving cavity.

[0011] Further, one side of the fixing portion facing the butting top has a clamping strip, and the clamping strip is inserted into the clamping groove.

[0012] Further, the butting member is clamped between the slider and the sliding groove of the outer rail to fix the relative position of the butting member.

[0013] Further, when the butting member abuts in the guiding groove, the butting member is disengaged from abutting against the sliding plug

[0014] Compared with the prior art, the drawer pre-tightening force slide rail provided by the present invention is provided with a butting member on the middle rail assembly, and the butting member abuts in the sliding groove of the outer rail. At the same time, a pre-tightening spring is provided between the butting member and the slider, so that the butting member always abuts in the sliding groove, so that the loss of the contact surface caused by friction between the slider and the outer rail can be compensated, and further the slider can always be tightly abutted against the outer rail, achieving the purpose of eliminating the gap. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of the drawer pre-tightening force slide rail provided by the present invention.

[0016] Figure 2 is Figure 1 an exploded structural diagram of the middle rail assembly of the drawer pre-tightening force slide rail.

[0017] Figure 3 is Figure 1 a cross-sectional structural diagram of the middle rail assembly of the drawer pre-tightening force slide rail DETAILED DESCRIPTION OF THE INVENTION

[0018] The following further details the specific embodiments of the present invention. It should be understood that the description of the embodiments of the present invention herein is not intended to limit the protection scope of the present invention.

[0019] As shown in Figures 1 to 3 the figure, it is a schematic structural diagram of the drawer pre-tightening force slide rail provided by the present invention. The drawer pre-tightening force slide rail includes an outer rail 10 and a middle rail assembly 20 disposed in the outer rail 10. It can be imagined that the drawer pre-tightening force slide rail further includes some other functional modules, such as an inner rail, assembly screws, mounting components, etc., which are well-known techniques to those skilled in the art and will not be elaborated herein.

[0020] The outer rail 10 includes an outer rail body 11 and a chute 12 disposed on the outer rail body 11. The outer rail body 11 can be made of metal or non-metal. The chute 12 includes a strip-shaped accommodating cavity 121 and two guide grooves 122 respectively disposed on both sides of the accommodating cavity 121. The specifications of the accommodating cavity 121 can be set according to actual needs, such as width and thickness. The guide grooves 122 are disposed on both sides of the accommodating cavity 121 and are symmetrically arranged, that is, the two guide grooves 122 are symmetric with respect to the middle plane of the accommodating cavity 121. In a cross-section perpendicular to the sliding direction of the chute 12, the profile of the guide groove 122 is an isosceles triangle. The straight lines where the heights of the isosceles triangles of the two guide grooves 122 are located coincide, and the straight lines where the heights of the two isosceles triangles are located are perpendicular to the sliding direction of the chute 12. By setting the guide groove 122 as an isosceles triangle, the contact area of the guide groove 122 can be increased, and thus the load can be increased, and the load-bearing capacity of the guide groove 112 can be improved.

[0021] The middle rail assembly 20 includes a slider 21 disposed in the chute 12, at least two abutting members 22 disposed on the slider 21, and a pre-tightening spring 23 disposed between the abutting member 22 and the slider. Since the slider 21 is disposed in the chute 12, it can slide along the chute 12. At the same time, the slider 21 is also used for fixedly setting the inner rail to drive the inner rail to slide. The slider 21 includes a body 211, two sliding inserts 212 respectively disposed on both sides of the body 211, and at least two accommodating grooves 213 for accommodating the abutting members 22. The body 211 is used for setting the inner rail, so bolt holes can be provided thereon. The sliding inserts 212 are respectively disposed on both sides of the body 211 and are symmetrically arranged. Specifically, the two sliding inserts 212 are also symmetric with respect to the middle plane of the accommodating cavity 121. In a cross-section perpendicular to the sliding direction of the chute 12, the contour line of the sliding insert 212 is also an isosceles triangle. At the same time, the isosceles triangle of the guide groove 122 is the same as the isosceles triangle of the sliding insert 212, so that the sliding insert 212 can be stably engaged with the guide groove 122 to facilitate the sliding insert 212 to slide along the guide groove 122.

[0022] The accommodating groove 213 is provided on the body 211 and the sliding plug 212, and includes a receiving cavity 2131 provided on the body 211, an abutting groove 2132 provided on the sliding plug 212, and a clamping groove 2133 provided on one side of the receiving cavity 2131 facing the abutting groove 2132. The receiving cavity 2131 is provided on the body 211 and is provided with a semi-circular groove for receiving and fixing the pre-tightening spring 23. The structure of the receiving cavity 2131 can be set according to actual needs. In this embodiment, the receiving cavity 2131 is a square groove. The abutting groove 2132 is used to receive a part of the abutting member 22, and is opened on the sliding plug 212. In a cross-section perpendicular to the sliding direction of the sliding groove 12, the area formed by the contour line of the abutting groove 2132 is half of the sliding plug 212. The clamping groove 2133 is provided on one side of the receiving cavity 2131 facing the abutting groove 2132 and is spaced from the abutting groove 2132.

[0023] The abutting member 22 includes an abutting portion 221 abutted in the sliding groove 12 and a fixing portion 222 connected to the abutting portion 221. The abutting portion 221 is received in the abutting groove 2132, and in a cross-section perpendicular to the sliding direction of the sliding groove 12, the contour line of the abutting portion 221 is half of the isosceles triangle of the sliding plug 212, so that the abutting portion 221 can be inserted into the guide groove 122 of the sliding groove 12 together with the other half of the sliding plug 212 corresponding to the abutting groove 2132. The fixing portion 222 is received in the receiving cavity 2131 and also includes a semi-circular groove. The semi-circular groove and the semi-circular groove of the receiving cavity 2131 are used together to receive and fix the pre-tightening spring 23. The fixing portion 222 further includes a clamping strip 223 provided on one side facing the abutting portion 221. The clamping strip 223 is inserted into the clamping groove 2132. During assembly, the clamping strip 223 should be inserted into the clamping groove 2132 first, and then other parts of the fixing portion 222 should be received in the receiving cavity 2131. The clamping strip 223 is spaced from the abutting portion 221, so that the relative position between the abutting member 22 and the slider 21 can be fixed. The abutting member 22 is clamped between the slider 21 and the sliding groove 12 of the outer rail 10 to fix the relative position of the abutting member 22.

[0024] In order to enable the abutting member 22 to have an abutting force and a pre-tightening force, when the abutting member 22 abuts in the guide groove 122, the abutting member 22 is disengaged from abutting against the sliding insert block 212, that is, the fixing portion 222 of the abutting member 22 is spaced from the top of the receiving cavity 2131. Thus, as the abutting member 22 wears, it is always abutted against the sliding groove 12 under the abutting of the pre-tightening spring 23. At the same time, at any time, the abutting portion 221 of the abutting member 22 is always under the abutting of the pre-tightening spring 23, and a pre-tightening force is applied between the outer rail 10 and the slider 21.

[0025] The pre-tightening spring 23 is received in the space formed by the two semi-circular grooves and abuts between the abutting portion 221 and the receiving cavity 2131. The pre-tightening spring 23 can be a compression spring, so as to always give a certain abutting force to the abutting member 22.

[0026] Compared with the prior art, the drawer pre-tightening force slide rail provided by the present invention is provided with an abutting member 22 on the middle rail assembly 20, and the abutting member 22 abuts in the sliding groove 12 of the outer rail 10. At the same time, a pre-tightening spring 23 is provided between the abutting member 22 and the slider 21, so that the abutting member 22 is always abutted in the sliding groove 12, thereby making up for the loss of the contact surface caused by friction between the slider 21 and the outer rail 10. Furthermore, the slider 21 can be always tightly abutted against the outer rail 10 to achieve the purpose of eliminating the gap.

[0027] The above is only the preferred embodiment of the present invention and is not used to limit the protection scope of the present invention. Any modification, equivalent replacement or improvement within the spirit of the present invention is covered by the scope of the claims of the present invention.

Claims

1. A drawer pre-tightening force slide rail, characterized in that: The drawer pre-tightening force slide rail includes an outer rail and a middle rail assembly disposed in the outer rail. The outer rail includes a chute, and the chute includes a receiving cavity and two guide grooves respectively disposed on both sides of the receiving cavity. The middle rail assembly includes a slider disposed in the chute, at least two abutting members disposed on the slider, and a pre-tightening spring disposed between the abutting member and the slider. The slider includes a body, two sliding inserts respectively disposed on both sides of the body, and at least two receiving grooves for receiving the abutting members. The receiving groove includes a receiving cavity disposed on the body and an abutting groove disposed on the sliding insert. In a cross-section perpendicular to the sliding direction of the chute, the profile of the sliding insert is an isosceles triangle. The receiving groove is disposed on the body and the sliding insert. The abutting member is received in the receiving groove and includes an abutting portion abutting in the chute and a fixing portion disposed in the receiving groove. The abutting portion is received in the abutting groove. In a cross-section perpendicular to the sliding direction of the chute, the profile of the abutting portion is half of the height of the isosceles triangle. The pre-tightening spring abuts between the abutting portion and the receiving groove to drive the abutting portion of the abutting member to abut against the chute. When the abutting member abuts in the guide groove, the abutting member disengages from abutting against the sliding insert, that is, the fixing portion of the abutting member is spaced from the top of the receiving cavity. Thus, as the abutting member wears, it always abuts against the chute under the abutting of the pre-tightening spring. At the same time, at any time, the abutting portion of the abutting member is always under the abutting of the pre-tightening spring, applying a pre-tightening force between the outer rail and the slider.

2. The drawer pre-tightening force slide rail according to claim 1, wherein: In a cross-section perpendicular to the sliding direction of the chute, the guide grooves are symmetrically disposed and the profile of the guide groove is an isosceles triangle. The sliding insert is inserted in the guide groove, and the isosceles triangle of the guide groove is the same as the isosceles triangle of the sliding insert.

3. The drawer pre-tightening force slide rail according to claim 2, wherein: The straight lines where the heights of the isosceles triangles of the two guide grooves are located coincide.

4. The drawer pre-tightening force slide rail according to claim 2, characterized in that: The body of the slider is received in the receiving cavity.

5. The drawer pre-tightening force slide rail according to claim 1, characterized in that: The receiving groove further includes a clamping groove disposed on one side of the receiving cavity facing the abutting groove.

6. The drawer pre-tightening force slide rail according to claim 5, wherein: The fixing portion further includes a semi-circular groove. A semi-circular groove is formed on the receiving cavity. The pre-tightening spring is received in the space formed by the two semi-circular grooves. The pre-tightening spring abuts between the abutting portion and the receiving cavity.

7. The drawer pre-tightening force slide rail according to claim 5, wherein: One side of the fixing portion facing the abutting portion has a clamping strip, and the clamping strip is inserted in the clamping groove.

8. The drawer pre-tightening force slide rail according to claim 1, characterized in that: The abutting member is clamped between the slider and the chute of the outer rail to fix the relative position of the abutting member.

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