A bidirectional pull-out slide rail

Abstract

The utility model discloses a bidirectional pull slide rail, including two groups of symmetrical side rail, the middle part of two groups side rail is slidably installed with slide rail, and is installed with a plurality of groups of positioning assembly between two groups of side rail and slide rail, the positioning assembly includes a plurality of groups of positioning slot of being set up in the side wall of slide rail, the middle part of side rail is provided with the mounting groove corresponding positioning slot, the inside of mounting groove is inserted and is installed with the positioning pin matched with positioning slot, the side wall of positioning pin evenly is provided with a plurality of groups of clamping block, and the inner wall of mounting groove is provided with annular groove corresponding clamping block, and the clamping block can be rotatablely connected in annular groove to restrict positioning pin and separate along the axial direction of mounting groove. Through the rotary joint cooperation of positioning pin side wall clamping block and annular groove, effectively resist vibration and impact, prevent the axial release of positioning pin, thereby ensure the locking reliability of slide rail on any telescopic position, avoid the accidental sliding in the use process, strengthen the stability and security of bidirectional pull operation.

Description

Technical Field

[0001] This utility model relates to the field of slide rail technology, specifically a bidirectional pull-out slide rail. Background Technology

[0002] Two-way pull-out slides, as a mechanical structure that enables bidirectional reciprocating pull-out movements, are widely used in furniture, industrial equipment, medical devices, warehousing and logistics, and other fields. Their core function is to enable the pull-out operation of drawers, trays, compartments and other components in two opposite directions through the relative sliding of the slide components, thereby improving space utilization and ease of operation.

[0003] Existing bidirectional pull-out slide rails mostly use a spring-loaded locating pin structure, whose positioning reliability highly depends on the continuous clamping force of the spring. Under vibration and impact, the locating pin may gradually dislodge from the locating groove, causing the slide rail to accidentally slip or disengage midway. Therefore, a new type of bidirectional pull-out slide rail is needed. Utility Model Content

[0004] The purpose of this utility model is to provide a bidirectional pull-out slide rail, which uses a locking block on the side wall of the positioning pin in the positioning component and a rotating locking structure with the annular groove on the inner wall of the mounting groove to prevent the positioning pin from accidentally coming out, thereby solving the technical problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A bidirectional pull-out slide rail includes two sets of symmetrically arranged side rails, with a slide rail slidably installed in the middle of the two sets of side rails, and several sets of positioning components installed between the two sets of side rails and the slide rail.

[0007] The positioning component includes several sets of positioning grooves formed on the side wall of the slide rail. The middle part of the side rail is provided with an installation groove corresponding to the positioning groove. A positioning pin that matches the positioning groove is inserted and installed inside the installation groove. Several sets of locking blocks are evenly arranged on the side wall of the positioning pin. An annular groove is formed on the inner wall of the installation groove corresponding to the locking block. The locking block can be rotatably engaged in the annular groove to prevent the positioning pin from disengaging along the axial direction of the installation groove.

[0008] Preferably, a spring is installed inside the mounting groove and sleeved outside the positioning pin. One end of the spring is connected to the bottom of the mounting groove, and the other side of the spring abuts against the side wall of the end of the positioning pin.

[0009] Preferably, one end of the positioning pin inserted into the positioning groove is hemispherical, and the groove shape of the plurality of positioning grooves is adapted to the hemispherical end of the positioning pin.

[0010] Preferably, the annular groove has several sets of slots on the side of the mounting groove near the opening of the mounting groove, the slots extend along the axial direction of the mounting groove and communicate with the annular groove, and the block can slide into the annular groove along the axial direction of the slot.

[0011] Preferably, the end of the positioning pin away from the positioning groove extends to the outside of the side rail and is fixedly connected to a connecting ring, and the inner wall of the connecting ring is uniformly provided with several sets of anti-slip ridges along the circumference.

[0012] Preferably, the two side walls of the slide rail are provided with strip-shaped grooves along their length direction, and several sets of positioning grooves are distributed at intervals along the length direction of the strip-shaped grooves at the bottom of the grooves.

[0013] Preferably, the inner wall of the side rail is rotatably fitted with several sets of ball bearings corresponding to the strip groove, and the slide rail achieves bidirectional sliding along the length of the side rail through the rolling cooperation between the strip groove and the ball bearings.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] The locating pin's sidewall locking block and the annular groove engage in a rotating engagement, providing a reliable mechanical locking structure that replaces the traditional single spring clamping method. This design effectively resists vibration and impact, preventing the locating pin from axially loosening, thus ensuring the reliability of the slide rail's locking at any extension or retraction position, avoiding accidental slippage during use, and significantly enhancing the stability and safety of bidirectional pull-out operation. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the strip groove structure of this utility model;

[0018] Figure 3 This is a schematic diagram showing the disassembled upper structure of the side rail of this utility model;

[0019] Figure 4 This is a schematic diagram of the internal structure of the mounting slot of this utility model.

[0020] In the diagram: 1. Side rail; 2. Slide rail; 3. Positioning component; 31. Positioning groove; 32. Mounting groove; 33. Positioning pin; 34. Locking block; 35. Annular groove; 36. Spring; 37. Slot; 38. Connecting ring; 4. Strip groove; 5. Ball bearing. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] This utility model provides: a bidirectional pull-out slide rail, such as Figures 1-4 As shown, the slide rail includes two symmetrically arranged side rails 1, with a slide rail 2 slidably mounted in the middle of the two side rails 1. Several sets of positioning components 3 are installed between the two side rails 1 and the slide rail 2. The side rails 1 are the supporting frame of the entire bidirectional pull-out slide rail, and the two symmetrically arranged structures provide a stable sliding reference for the slide rail 2. The slide rail 2 is the core moving component that realizes the bidirectional pull-out function. It is slidably mounted in the middle of the two side rails 1 and can drive loads such as trays to move bidirectionally along the length of the side rails 1.

[0023] The positioning component 3 includes several sets of positioning grooves 31 formed on the side wall of the slide rail 2. A mounting groove 32 is formed in the middle of the side rail 1 corresponding to the positioning groove 31. A positioning pin 33 matching the positioning groove 31 is inserted into the mounting groove 32. Several sets of locking blocks 34 are evenly arranged on the side wall of the positioning pin 33. An annular groove 35 is formed on the inner wall of the mounting groove 32 corresponding to the locking blocks 34. The locking blocks 34 can be rotatably engaged in the annular groove 35 to prevent the positioning pin 33 from axially disengaging along the mounting groove 32. The mounting groove 32 provides guidance for the positioning pin 33. The positioning pin 33 directly fixes the relative position of the slide rail 2 and the side rail 1 by embedding into the positioning groove 31. The locking blocks 34 on the side wall of the positioning pin 33 and the annular groove 35 on the inner wall of the mounting groove 32 constitute a mechanical locking structure to prevent the positioning pin 33 from axially disengaging. When it is necessary to lock the position of the slide rail 2, push the positioning pin 33 along the axial direction of the mounting groove 32 so that its end is embedded in the positioning groove 31 of the slide rail 2. Then rotate the positioning pin 33 to drive the locking block 34 to rotate in the annular groove 35 and engage with the inner wall of the annular groove 35. At this time, the annular groove 35 blocks the locking block 34 from moving axially, thereby limiting the positioning pin 33 from disengaging from the positioning groove 31 and achieving stable locking of the slide rail 2. When it is necessary to pull the slide rail 2 out, rotate the positioning pin 33 in the opposite direction to unlock the locking block 34 from the annular groove 35, pull the positioning pin 33 out of the positioning groove 31, and then push the slide rail 2 to slide bidirectionally along the middle of the side rail 1.

[0024] Preferably, a spring 36 is installed inside the mounting groove 32, sleeved on the outside of the positioning pin 33. One end of the spring 36 is connected to the bottom of the mounting groove 32, and the other side of the spring 36 abuts against the side wall of the end of the positioning pin 33. This sleeved installation method ensures that the spring force of the spring 36 is always along the axial direction of the positioning pin 33, preventing the positioning pin 33 from jamming due to spring force deviation. One end of the spring 36 is connected to the bottom of the mounting groove 32, and the other end abuts against the end of the positioning pin 33, forming a continuous pushing force on the positioning pin 33. When the positioning pin 33 is not locked, the spring 36 is in a naturally extended or slightly compressed state, applying a pushing force towards the positioning groove 31 to the positioning pin 33. When the positioning pin 33 is pushed into the positioning groove 31, the positioning pin 33 compresses the spring 36 and stores its elastic potential energy. After the positioning pin 33 is rotated to lock the block 34 and the annular groove 35, the elastic potential energy of the spring 36 is converted into a continuous pushing force, which tightly presses the positioning pin 33 into the positioning groove 31, reducing the gap between the positioning pin 33 and the positioning groove 31 caused by vibration or impact, and preventing loosening. When unlocking, after the positioning pin 33 is rotated in the opposite direction to disengage the block 34 from the annular groove 35, the elastic force of the spring 36 can assist the positioning pin 33 to automatically pop out of the positioning groove 31, improving the ease of operation.

[0025] Furthermore, one end of the positioning pin 33 inserted into the positioning groove 31 is hemispherical, and the opening shape of several sets of positioning grooves 31 is adapted to the hemispherical end of the positioning pin 33. The hemispherical end of the positioning pin 33 allows for a smoother fit between the positioning pin 33 and the positioning groove 31. The arc-shaped surface of the hemispherical end reduces frictional resistance during insertion and also provides an automatic centering function. When the positioning pin 33 is pushed into the positioning groove 31, the hemispherical end of the positioning pin 33 first contacts the opening of the positioning groove 31. The arc-shaped surface guides the positioning pin 33 to automatically adjust its angle. Even if there is a slight offset in the slide rail 2, it can still accurately align with the center of the positioning groove 31, allowing for smooth insertion without the need for precise manual alignment. In addition, the hemispherical design avoids jamming points when inserting the right-angle end, improving the flexibility of positioning adjustment.

[0026] Furthermore, the annular groove 35 has several sets of slots 37 on the side near the opening of the mounting groove 32, corresponding to the locking block 34. The slots 37 extend axially along the mounting groove 32 and communicate with the annular groove 35, allowing the locking block 34 to slide axially into the annular groove 35 along the slots 37. The slots 37 are guide structures that provide a channel for the locking block 34 to enter the annular groove 35. Their axial extension direction is consistent with the mounting groove 32 and they communicate with the annular groove 35, ensuring that the locking block 34 can smoothly enter the locking area. When installing the positioning pin 33, first align the locking block 34 on the side wall of the positioning pin 33 with the slot 37 on the inner wall of the mounting groove 32 on the side rail 1, and push the positioning pin 33 along the axial direction of the slot 37 so that the locking block 34 slides into the annular groove 35 together with the positioning pin 33; after the end of the positioning pin 33 is fully embedded in the positioning groove 31, rotate the positioning pin 33 clockwise or counterclockwise to drive the locking block 34 to rotate in the annular groove 35 until the locking block 34 is completely misaligned with the slot 37. At this time, the inner wall of the annular groove 35 prevents the locking block 34 from moving outward along the axial direction, thus completing the axial locking of the positioning pin 33.

[0027] It is worth noting that the end of the positioning pin 33 furthest from the positioning groove 31 extends to the outside of the side rail 1 and is fixedly connected to a connecting ring 38. Several sets of anti-slip protrusions are evenly arranged circumferentially on the inner wall of the connecting ring 38. The connecting ring 38 is fixed to the end of the positioning pin 33 extending from the side rail 1, providing a stable grip point for hand application; the anti-slip protrusions on its inner wall increase the frictional resistance between the fingers and the connecting ring 38, preventing slippage during operation. When it is necessary to rotate or push / pull the positioning pin 33, the operator inserts their fingers into the connecting ring 38, grips the inner wall of the connecting ring 38, and applies rotational or axial force. Through the fixed connection between the connecting ring 38 and the positioning pin 33, the positioning pin 33 is driven to rotate or move synchronously, avoiding operational errors caused by slippage and improving the reliability of positioning, locking, and unlocking.

[0028] Specifically, the two side walls of the slide rail 2 are provided with strip-shaped grooves 4 along their length, and several sets of positioning grooves 31 are distributed at intervals along the length of the strip-shaped grooves 4 at the bottom of the grooves 4. The groove walls of the strip-shaped grooves 4 can limit the lateral displacement of the slide rail 2, ensuring that the slide rail 2 moves only along the length of the side rail 1; at the same time, the bottom of the strip-shaped grooves 4 provides a regular opening space for the positioning grooves 31, so that the positioning grooves 31 can be orderly distributed along the sliding direction of the slide rail 2. When the slide rail 2 cooperates with the side rail 1, the ball bearings 5 ​​on the inner wall of the side rail 1 are embedded in the strip-shaped grooves 4, and the two side walls of the strip-shaped grooves 4 block the lateral movement of the auxiliary sliding components, thereby limiting the slide rail 2 from tilting left and right or wobbling up and down during the sliding process, ensuring the stability of the movement trajectory of the slide rail 2.

[0029] More specifically, several sets of balls 5 are rotatably installed on the inner wall of the side rail 1 corresponding to the strip groove 4. The slide rail 2 achieves bidirectional sliding along the length of the side rail 1 through the rolling cooperation between the strip groove 4 and the balls 5. The balls 5 are rotatably installed on the inner wall of the side rail 1 and correspond to the strip groove 4 of the slide rail 2. Their rolling characteristics can convert the sliding friction between the slide rail 2 and the side rail 1 into rolling friction, greatly reducing the coefficient of friction. When the operator pushes the slide rail 2, the bottom of the groove 4 on both sides of the slide rail 2 contacts the balls 5 on the inner wall of the side rail 1. The moving force of the slide rail 2 drives the balls 5 to roll in the strip groove 4. The resistance of rolling friction is much less than that of sliding friction, making the bidirectional pulling of the slide rail 2 smoother and less labor-intensive.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A bidirectional pull-out slide rail, characterized in that: It includes two sets of symmetrically arranged side rails (1), and a slide rail (2) is slidably installed in the middle of the two sets of side rails (1). Several sets of positioning components (3) are installed between the two sets of side rails (1) and the slide rail (2). The positioning component (3) includes several sets of positioning grooves (31) opened on the side wall of the slide rail (2). The middle part of the side rail (1) is provided with an installation groove (32) corresponding to the positioning groove (31). The installation groove (32) is filled with a positioning pin (33) that matches the positioning groove (31). Several sets of locking blocks (34) are evenly arranged on the side wall of the positioning pin (33). The inner wall of the installation groove (32) is provided with an annular groove (35) corresponding to the locking block (34). The locking block (34) can be rotatably locked in the annular groove (35) to restrict the positioning pin (33) from detaching axially along the installation groove (32).

2. The bidirectional pull-out slide rail according to claim 1, characterized in that: The mounting groove (32) is equipped with a spring (36) sleeved on the outside of the positioning pin (33). One end of the spring (36) is connected to the bottom of the mounting groove (32), and the other side of the spring (36) abuts against the side wall of the end of the positioning pin (33).

3. The bidirectional pull-out slide rail according to claim 1, characterized in that: The end of the positioning pin (33) inserted into the positioning groove (31) is hemispherical, and the groove shape of several sets of positioning grooves (31) is adapted to the hemispherical end of the positioning pin (33).

4. The bidirectional pull-out slide rail according to claim 1, characterized in that: The annular groove (35) has several sets of slots (37) on the side of the mounting groove (32) near the opening. The slots (37) extend axially along the mounting groove (32) and communicate with the annular groove (35). The slots (34) can slide axially into the annular groove (35) along the slots (37).

5. A bidirectional pull-out slide rail according to claim 1, characterized in that: The end of the positioning pin (33) away from the positioning groove (31) extends to the outside of the side rail (1) and is fixedly connected to a connecting ring (38). The inner wall of the connecting ring (38) is uniformly provided with several sets of anti-slip ridges along the circumference.

6. A bidirectional pull-out slide rail according to claim 1, characterized in that: The slide rail (2) has strip grooves (4) on both sides along its length direction, and several sets of positioning grooves (31) are distributed at intervals along the length direction of the strip grooves (4) at the bottom of the strip grooves (4).

7. A bidirectional pull-out slide rail according to claim 6, characterized in that: The inner wall of the side rail (1) is rotatably mounted with several sets of balls (5) corresponding to the strip groove (4). The slide rail (2) achieves bidirectional sliding along the length direction of the side rail (1) through the rolling cooperation between the strip groove (4) and the balls (5).

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