Movable depth adjustment rail for a furniture drawer

Abstract

The application discloses a movable depth-adjusting guide rail for a furniture drawer, comprising a fixed rail and a movable rail in relative movement cooperation, a driving device and a depth-adjusting device; the depth-adjusting device comprises a fixed seat, a stopper and a locking piece, wherein the locking piece is rotatably installed on the fixed seat around a rotating shaft parallel to the moving direction of the movable rail; the stopper comprises an adjusting rod and a bump block, and the locking piece is formed with a locking hole; the rotating movement of the locking piece is used to rotate and switch between a tension position and a release position; when the locking piece is rotated and switched to the tension position, the inner wall of the locking hole tightly presses the adjusting rod to limit the axial movement of the stopper; when the locking piece is rotated and switched to the release position, the inner wall of the locking hole is in a relaxed state with the adjusting rod, so that the adjusting rod can move axially along the rotating shaft under the action of external force.

Description

Technical Field

[0001] This invention relates to the technical field of drawer slide structures, and in particular to a movable depth-adjustable drawer slide for furniture drawers. Background Technology

[0002] In the existing furniture industry, guide rails are widely used in drawer products. The sliding guide rails guide the sliding motion, thereby realizing the push-pull movement. As the market's functional demands become more diverse, functions such as "buffered self-closing" and / or "press-rebound" have appeared on the market, such as the "guide rail rebound box" disclosed in the applicant's previous patent application "CN115299720A, a press-rebound type guide rail rebound box, drawer guide rail".

[0003] Secondly, errors in guide rail installation and dimensional errors in the drawer front panel can lead to inconsistent gaps between the drawer front panel and the cabinet when closed, affecting the overall aesthetics of the furniture. To address this issue, patent TWI767690B discloses a depth adjustment device that uses a depth adjustment wheel to drive a stop element along a preset longitudinal axis. While this method is simple to operate, it suffers from the following problems: 1) Complex assembly leads to low production efficiency; 2) Because the depth adjustment wheel is directly exposed outside the drawer rail, users are prone to accidentally touching it while pulling out the drawer, or children may move it out of curiosity, causing unnecessary longitudinal movement of the stop element; 3) Frequent opening and closing of the drawer causes frequent collisions between the stop element and the drive mechanism. The threaded engagement between the depth adjustment wheel and the stop element, coupled with the fact that the depth adjustment device is typically made of plastic, limits the structural strength of the threaded engagement. Frequent impacts can cause breakage or damage to the threaded engagement, ultimately leading to the depth adjustment wheel jamming or losing its ability to drive the stop element. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a movable depth-adjustable guide rail for furniture drawers that has a stable and reliable structure and high assembly efficiency.

[0005] To achieve the above objectives, the present invention provides a movable depth-adjustable guide rail for furniture drawers, comprising a fixed rail and a movable rail that are relatively movablely engaged, a drive device for driving the movable rail to move within a portion of a predetermined moving path between a closed position and an open position, and a depth-adjusting device for adjusting the closed position of the movable rail relative to the fixed rail; the depth-adjusting device includes a fixed base, a stop member, and a locking member, wherein the locking member is rotatably mounted on the fixed base about a rotation axis parallel to the moving direction of the movable rail; the stop member includes a through-hole that is movably inserted along the rotation axis. The system includes an adjusting rod with a fixed base and a locking member, and a stop block for engaging with the drive device in the closed position. The locking member has a locking hole with an eccentric circular cross-section through which the adjusting rod passes. The locking member rotates to switch between a tensioned position and a released position. When the locking member is rotated to the tensioned position, the inner wall of the locking hole tightly presses against the adjusting rod to restrict axial movement of the stop. When the locking member is rotated to the released position, the inner wall of the locking hole is relaxed between the adjusting rod and the adjusting rod, allowing the adjusting rod to move axially along the rotation axis under external force.

[0006] Furthermore, the cross-section of the locking hole is elliptical, and the cross-section of the adjustment area where the adjusting rod passes through and engages with the locking hole is also elliptical.

[0007] Furthermore, the adjustment area of ​​the adjustment rod is formed with at least one transmission tooth, and an external force is applied to the adjustment rod by a preset operating tool cooperating with the transmission tooth to move it axially along the rotation axis.

[0008] Furthermore, the locking member is formed with an operating port that communicates with the locking hole. A preset operating tool is inserted into the operating port and engages with the transmission gear to apply external force to the adjusting rod and move it axially along the rotation axis.

[0009] Furthermore, when the locking member is rotated to the release position, the transmission teeth are exposed in the area corresponding to the operating port; conversely, when the locking member is rotated to the tension position, the operating port avoids the transmission teeth and the locking hole surrounds and blocks the transmission teeth.

[0010] Furthermore, the fixed base is formed with a limiting hole for the adjusting rod to pass through, and the cross-section of the limiting area where the adjusting rod passes through and engages with the limiting hole is in an irregular shape that matches the limiting hole. The limiting hole and the limiting area of ​​the adjusting rod are engaged to restrict the rotational movement of the adjusting rod relative to the fixed base.

[0011] Furthermore, the limiting area of ​​the adjusting rod overlaps with the adjusting area.

[0012] Furthermore, the locking member has a protruding paddle.

[0013] The present invention adopts the above-mentioned solution, and its beneficial effects are as follows: 1) The installation method of the adjusting rod of the stop member being movable through the fixed seat and the locking member improves the assembly efficiency and reduces the assembly difficulty; 2) The locking member rotates to switch between the tension position and the release position, and the adjusting rod is tightly pressed by the inner wall of the locking hole with an eccentric circle cross-section to restrict the axial movement of the stop member, thereby effectively improving and reducing the impact caused by the frequent collision between the block and the driving device, ensuring that the stop member will not easily move axially, and the stability is higher; 3) The adjusting rod is formed with transmission teeth that cooperate with the externally preset operating tool to drive the adjusting rod to move axially, effectively solving the problem of accidental contact, while also making the adjustment operation convenient and quick; 4) As the locking member rotates to switch between the tension position and the release position, when the rotation is switched to the release position, the transmission teeth are exposed in the area corresponding to the operating port, so that the adjustment operation can be performed; conversely, when the rotation is switched to the tension position, the adjustment operation cannot be performed, which has a protective effect. Attached Figure Description

[0014] Figure 1 This is a structural diagram of a guide rail application.

[0015] Figure 2 This is a schematic diagram of the guide rail structure.

[0016] Figure 3 for Figure 2 A magnified view of part A in the image.

[0017] Figure 4 This is a schematic diagram of the drive device and the depth adjustment device.

[0018] Figure 5 This is a schematic diagram of the depth adjustment device.

[0019] Figure 6 This is a schematic diagram of an explosion of a depth adjustment device.

[0020] Figure 7 This is a schematic diagram showing the locking element in the tensioned position.

[0021] Figure 8 for Figure 7 A partial sectional view of BB in the image.

[0022] Figure 9 This is a schematic diagram showing the locking element in the released position.

[0023] Figure 10 for Figure 9 A partial sectional view of CC in the image.

[0024] Among them, 100-cabinet body, 200-drawer, 1-fixed rail, 2-moving rail, 3-drive device, 31-stop block, 32-reset block, 4-depth adjustment device, 41-fixed base, 411-limiting hole, 42-locking element, 421-locking hole, 422-operating port, 423-toggle block, 43-stop element, 431-adjusting rod, 432-stop block, 433-transmission gear, OP-moving direction, D-rotation shaft, F-adjustment area, G-limiting area, S-clearance. Implementation

[0025] To facilitate understanding of the present invention, a more complete description is given below with reference to the accompanying drawings. Preferred embodiments of the invention are shown in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided so that this disclosure will be thorough and complete.

[0026] See appendix Figure 1 As shown in this embodiment, a movable depth-adjustable guide rail for furniture drawers includes a fixed rail 1 and a movable rail 2 that move in relative cooperation, a drive device 3, and a depth-adjusting device 4. Common guide rail structures in the art include two-section rails consisting of a fixed rail 1 and a movable rail 2, and three-section rails consisting of a fixed rail 1, an intermediate rail (not shown in the figure), and a movable rail 2. The rails are slidably installed via sliding supports. Their structure and principle are conventional techniques and will not be elaborated upon here. Furthermore, the fixed rail 1 is fixedly connected to the furniture cabinet 100, and the movable rail 2 is fixedly connected to the drawer 200. The relative movement between the movable rail 2 and the fixed rail 1 is achieved through the pushing and pulling action of the drawer 200.

[0027] See appendix Figure 2-4 As shown, in this embodiment, the driving device 3 is used to drive the movable rail 2 to move within a portion of the movement path between a predetermined closed position and an open position, thereby realizing the functions of closing buffer self-closing and / or pressing and opening of the movable rail 2. Its structure and principle are conventional technical means, and can be referred to in existing patents CN213282174U, CN115299720A and TWI767690B. The specific principles and structural features will not be elaborated here. For ease of understanding, the driving device 3 is defined as being fixedly installed on the fixed rail 1. It includes a housing, a stop block 31 slidably disposed on the housing, and a reset block 32 movably hinged to the front end of the stop block 31. A gap S is left between the stop block 31 and the reset block 32, and the reset block 32 can slide down into a pre-set clearance groove in the housing.

[0028] See appendix Figure 5 and 6As shown, in this embodiment, the depth adjustment device 4 is used to adjust the closed position of the movable rail 2 relative to the fixed rail 1. The depth adjustment device 4 is mounted on the movable rail 2. Specifically, the depth adjustment device 4 includes a fixed base 41, a stop 43, and a locking member 42. The fixed base 41 has an inverted U-shaped structure and two positioning ears are formed at both ends. The locking member 42 is rotatably mounted on the fixed base 41 about a rotation axis D that moves parallel to the movable rail 2. The stop 43 includes an adjusting rod 431 that is movably inserted through the fixed base 41 and the locking member 42 along the rotation axis D, and a stop block 432 for contacting and engaging with the drive device 3 in the closed position. Specifically, the positioning ear of the fixed base 41 is provided with a coaxially aligned through hole through which the adjusting rod 431 passes, and the locking member 42 is formed with a locking hole 421 through which the adjusting rod 431 passes. Thus, after the stop member 43 passes through the through hole of the fixed base 41 and the locking hole 421 of the locking member 42 along the rotation axis D, the installation and cooperation of the three can be realized. At this time, the adjusting rod 431 of the stop member 43 also serves as the connecting shaft between the fixed base 41 and the locking member 42, so that the locking member 42 can rotate around the rotation axis D. Since the stop member 43 is in a movable fit relationship with the fixed base 41 and the locking member 42, the stop member 43 moves axially along the rotation axis D.

[0029] In this embodiment, see Appendix Figure 7-10 As shown, the cross-section of the locking hole 421 is an eccentric circle. Therefore, through the rotational movement of the locking member 42, the eccentric region of the inner wall of the locking hole 421 can avoid or press against the inner wall of the adjusting rod 431, thereby allowing the locking member 42 to rotate between a predetermined tension position and a release position. Specifically, see the attached diagram. Figure 7-8 As shown, when the locking member 42 is rotated to the tensioned position, the inner wall of the locking hole 421 tightly presses against the adjusting rod 431 to restrict the axial movement of the stop member 43, thus achieving a locking effect; conversely, see Appendix Figure 9-10 As shown, when the locking member 42 is rotated to the release position, the inner wall of the locking hole 421 and the adjusting rod 431 are in a relaxed state, so that the adjusting rod 431 can move axially along the rotation axis D under the action of external force, thereby playing the role of release and adjustment.

[0030] Further details can be found in the appendix. Figure 7-10 As shown, the cross-section of the locking hole 421 in this embodiment is elliptical, and the cross-section of the adjustment area F where the adjusting rod 431 passes through and engages with the locking hole 421 is also elliptical. Therefore, as the locking member 42 rotates, (see attached diagram) Figure 9 and 10As shown, when the elliptical major axis region of the locking hole 421 overlaps with the elliptical major axis region of the adjusting rod 431, and when the elliptical minor axis region of the locking hole 421 overlaps with the elliptical minor axis region of the adjusting rod 431, the corresponding locking member 42 is in the released position, and the inner wall of the locking hole 421 and the adjusting rod 431 are in a relaxed state; conversely, see Appendix Figure 7 and 8 As shown, when the elliptical major axis region of the locking hole 421 overlaps with the elliptical minor axis region of the adjusting rod 431, and when the elliptical minor axis region of the locking hole 421 overlaps with the elliptical major axis region of the adjusting rod 431, the corresponding locking member 42 is in the tensioned position, and a tight pressure occurs between the inner wall of the locking hole 421 and the adjusting rod 431.

[0031] Furthermore, in this embodiment, the major axis of the elliptical adjustment area F of the adjustment rod 431 is arranged vertically and the minor axis is arranged horizontally, i.e.: see Appendix Figure 9 and 10 As shown, when the locking member 42 is rotated downwards to the vertical position, so that the major axis of the elliptical locking hole 421 is arranged vertically and the minor axis is arranged horizontally, the corresponding rotation switches to the release position; conversely, see the appendix. Figure 7 and 8 As shown, when the locking member 42 is rotated upward to the lateral position, so that the major axis of the elliptical locking hole 421 is arranged laterally and the minor axis is arranged vertically, the corresponding rotation switches to the tensioning position. The tensioning and release positions are not limited to a single position; those skilled in the art can use derived positions according to the actual product requirements.

[0032] To facilitate the up-and-down rotation of the locking member 42, the locking member 42 has a protruding lever 423. When in use, the user can move the lever 423 to make the locking member 42 rotate around the rotation axis D.

[0033] In this embodiment, the contact block 432 is located near the rear side of the depth adjustment device 4, close to the drive device 3. The gap S between the stop block 31 and the reset block 32 can accommodate the contact block 432, thereby enabling the contact block 432 to contact and cooperate with the drive device 3 in the closed position of the movable rail 2. That is, when the movable rail 2 slides from the open position to the closed position, the depth adjustment device 4 moves synchronously with the movable rail 2, and the reset block 32 is in the clearance groove in a downward swing clearance state, causing the contact block 432 to continuously move backward in the closed position and contact the stop block 31, thereby driving the stop block 31 to move backward. 31 moves backward and reset block 32 swings upward to exit the clearance groove and moves backward synchronously (at this time, the contact block 432 is restricted in the gap S space between the stop block 31 and the reset block 32) until the movable rail 2 is completely closed; conversely, when the movable rail 2 slides open from the closed position to the open position, the depth adjustment device 4 moves synchronously with the movable rail 2, the contact block 432 touches the stop block 31 and / or the reset block 32 and continues to move forward until the reset block 32 swings down into the clearance groove, the contact block 432 completely disengages from the drive device 3, and the movable rail 2 is then fully opened by external force or inertia.

[0034] Furthermore, when the movable rail 2 is fully closed, the gap S between the front panel of the drawer 200 and the cabinet 100 is determined by the distance between the movable rail 2 and the fixed rail 1 in the moving direction OP, and is further determined by the distance between the stop block 432 and the fixed seat 41.

[0035] Therefore, see appendix Figure 1 and 2 As shown, the axial movement of the stop 43 of the depth adjustment device 4 in the moving direction OP can produce different sizes of the gap S between the front panel and the cabinet 100. Specifically, in this embodiment, the adjusting rod 431 moves axially under the action of external force, which synchronously drives the stop block 432 to move, thereby adjusting the distance between the stop block 432 and the fixed seat 41. That is, when the adjusting rod 431 moves axially towards the drive device 3, the distance between the stop block 432 and the fixed seat 41 is increased, which correspondingly increases the gap S between the front panel of the drawer 200 and the cabinet 100; conversely, when the adjusting rod 431 moves axially away from the drive device 3, the distance between the stop block 432 and the fixed seat 41 is decreased, which correspondingly decreases the gap S between the front panel of the drawer 200 and the cabinet 100.

[0036] In this embodiment, see Appendix Figure 6As shown, the locking member 42 has an operating port 422 communicating with the locking hole 421. In this embodiment, the operating port 422 is arranged adjacent to one side of the elliptical major axis region of the locking hole 421, and the operating port 422 and the locking hole 421 are arranged perpendicularly and alternately. Secondly, the adjusting area F of the adjusting rod 431 has at least one transmission tooth 433 (preferably three transmission teeth 433 arranged sequentially along the rotation axis D), and in this embodiment, the transmission tooth 433 is located adjacent to the lower side of the elliptical major axis region of the adjusting rod 431. Therefore, see the attached diagram. Figure 9-10 As shown, when the locking member 42 rotates to the release position, the operating port 422 rotates to a horizontal position, and the transmission gear 433 is exposed in the area corresponding to the operating port 422. This allows the user to hold an operating tool (preferably a Phillips screwdriver or a specific non-standard tool derived therefrom, not specifically limited here) and insert it into the operating port 422 from the side of the movable rail 2 (the movable rail 2 needs to be opened and pulled out to the open position beforehand) to engage with the transmission gear 433, thereby applying external force to the adjusting rod 431 to move it axially along the rotation axis D; conversely, see Appendix Figure 7-8 As shown, when the locking member 42 is rotated to the tension position, the operating port 422 is rotated to the vertical position. The operating port 422 avoids the transmission tooth 433 and the locking hole 421 surrounds and blocks the transmission tooth 433, thereby preventing the user from forcibly applying force to the transmission tooth 433 with the help of operating tools, thus protecting the depth adjustment device 4.

[0037] See appendix Figure 5 and 6 As shown, in this embodiment, the perforation on the positioning ear of the fixed base 41 located on the side away from the driving device 3 also serves as a limiting hole 411 with an irregular cross-section for the adjustment rod 431 to pass through. The limiting hole 411 is convex in shape. The cross-section of the limiting area G where the adjustment rod 431 passes through and engages with the limiting hole 411 is also irregular in shape and convex in shape. By engaging the limiting area G of the adjustment rod 431 with the irregularly shaped limiting hole 411, the rotational movement of the adjustment hole relative to the fixed base 41 is restricted, ensuring that the stop member 43 can only move axially.

[0038] Furthermore, in this embodiment, the limiting area G of the adjusting rod 431 partially or completely overlaps with the adjusting area F in the axial direction of the rotation axis D. That is, the limiting area G of the adjusting rod is an irregular shape ("convex") with two grooves formed in the circumferential surface based on an ellipse. Similarly, the limiting area G also has elliptical major and minor axis areas, which can also be tightly pressed against the inner wall of the locking hole, and also have a locking function, thereby effectively shortening the length of the stop and the fixing seat, making the overall structure lighter and simpler.

[0039] In this embodiment, several scale lines are formed on the circumferential surface of the adjusting rod 431 so that when the user drives the stop 43 to move axially, he can intuitively confirm the moving distance by observing the scale lines, making the gap S adjustment more precise and convenient.

[0040] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any way. Any modifications or variations made by those skilled in the art, without departing from the scope of the present invention, using the disclosed technical content, are equivalent embodiments of the present invention. Therefore, all equivalent changes made based on the concept of the present invention without departing from the scope of the present invention should be covered within the protection scope of the present invention.

Claims

1. A movable depth-adjustable guide rail for a furniture drawer, comprising a fixed rail (1) and a movable rail (2) that move relative to each other, a drive device (3) for driving the movable rail (2) to move within a portion of a predetermined moving path between a closed position and an open position, and a depth-adjusting device (4) for adjusting the closed position of the movable rail (2) relative to the fixed rail (1); characterized in that: The depth adjustment device (4) includes a fixed base (41), a stop (43), and a locking member (42). The locking member (42) is rotatably mounted on the fixed base (41) about a rotation axis (D) parallel to the moving direction (OP) of the movable rail (2). The stop (43) includes an adjusting rod (431) movably passing through the fixed base (41) and the locking member (42) along the rotation axis (D) and a stop block (432) for engaging with the drive device (3) in the closed position. The locking member (42) is formed with a locking hole (421) through which the adjusting rod (431) passes and has an eccentric circular cross-section. The locking member (42) can rotate between a tensioned position and a release position by rotating. When the locking member (42) is rotated to the tensioned position, the inner wall of the locking hole (421) is tightly closed. The adjusting rod (431) is pressed to restrict the axial movement of the stop (43); when the locking member (42) is rotated to the release position, the inner wall of the locking hole (421) and the adjusting rod (431) are relaxed, so that the adjusting rod (431) can move axially along the rotation axis (D) under the action of external force; the adjusting area (F) of the adjusting rod (431) is formed with at least one transmission tooth (433), and the adjusting rod (431) is applied to the adjusting rod (431) by cooperating with the transmission tooth (433) through a preset operating tool; the locking member (42) is formed with an operating port (422) communicating with the locking hole (421), and the adjusting rod (431) is applied to the adjusting rod (431) by inserting the preset operating tool into the operating port (422) and cooperating with the transmission tooth (433) through the transmission tooth (433) to apply external force to the adjusting rod (431) to move axially along the rotation axis (D).

2. The movable depth adjustable guide rail for furniture drawers according to claim 1, characterized in that: The cross-section of the locking hole (421) is elliptical, and the cross-section of the adjustment area (F) through which the adjusting rod (431) and the locking hole (421) are fitted is also elliptical.

3. The movable depth adjustable guide rail for furniture drawers according to claim 1, characterized in that: When the locking member (42) is rotated to the release position, the transmission tooth (433) is exposed in the area corresponding to the operating port (422); conversely, when the locking member (42) is rotated to the tension position, the operating port (422) avoids the transmission tooth (433) and the locking hole (421) surrounds and blocks the transmission tooth (433).

4. The movable depth adjustable guide rail for furniture drawers according to claim 1, characterized in that: The fixed seat (41) is formed with a limiting hole (411) through which the adjusting rod (431) passes and has an irregular cross-section. The cross-section of the limiting area (G) of the adjusting rod (431) and the limiting hole (411) is in an irregular shape and matches the limiting hole (411). The limiting area (G) of the adjusting rod (431) is restricted from rotating relative to the fixed seat (41) by the limiting hole (411) and the limiting area (G) of the adjusting rod (431).

5. A movable depth-adjustable guide rail for furniture drawers according to claim 4, characterized in that: The limiting area (G) of the adjusting rod (431) overlaps with the adjusting area (F).

6. A movable depth-adjustable guide rail for furniture drawers according to claim 1, characterized in that: The locking member (42) has a lever (423) protruding outward.

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