A buffer rebound device for a slide rail

Abstract

The utility model provides a kind of buffer rebound device for slide rail, including pressing rebound device and buffer device, buffer device is installed on the fixed rail of slide rail assembly, the damper of the movable rail of slide rail assembly and buffer device is buckled or separated;Pressing rebound device includes pedestal, pressing rebound component and function switching component, pedestal is installed in the movable rail of slide rail assembly, the elastic positioning part of pressing rebound component is buckled with one end of pedestal, the elastic movable part of pressing rebound component is slidably connected on the upper surface of pedestal, and cooperate the structure of the function switching seat of function switching component, transmission gear piece, switching control piece, rack assembly, simple structure, also can realize pressing rebound after closing slide rail again, power storage can be achieved in any position and power storage point is linear, then reach the function of buffer closing, strong applicability, reliable and practical, ensure product use effect.

Description

Technical Field

[0001] This utility model relates to the field of slide rail technology, specifically a buffer rebound device for slide rails. Background Technology

[0002] Currently, the functional components of the buffer rebound slide rail include a press-to-rebound buffer device, which is installed on the slide rails on the left and right sides of the drawer. A synchronous running component is installed between the press-to-rebound buffer devices. The press-to-rebound buffer device stores energy when the slide rail is closed and leaves space for pressing to unlock. When the drawer is pressed, the drawer unlocks and rebounds, realizing the automatic pop-out of the pull-out furniture. It is convenient to use and has a high safety performance.

[0003] The aforementioned buffer-rebound slide rail typically switches between buffering and rebound functions by adding a circulation groove to the rebound slide rail principle. The energy storage sliding module connected to the power unit moves within this groove via a guide. The function switching is achieved through the structural coordination between the energy storage sliding module, the rebound housing, and the actuating block. This allows the slide rail to achieve a buffered closure after being pressed and rebounded, with the buffer device assisting in the closing process. Alternatively, after the slide rail is closed, it can be pulled out directly, and then closed without damping. These solutions allow for energy storage at the front end or after closing to a certain position before buffering closure. However, the energy storage position when closing the slide rail can only be a fixed point, not an arbitrary position. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a buffer rebound device for slide rails. It has a simple structure and can achieve the function of storing force at any position when the slide rail is closed after being pressed and rebounded, with the storage point being linear, and then buffering and closing. It is highly applicable, reliable and practical, and ensures the product's performance.

[0005] The purpose of this invention is achieved as follows: a buffer rebound device for a slide rail includes a press-rebound device and a buffer device with a buffer closing function installed on the slide rail assembly. The buffer device is installed on the fixed rail of the slide rail assembly. The movable rail of the slide rail assembly is engaged with or disengaged from the damper of the buffer device as it opens and closes. The press-rebound device includes a base adapted to be installed on the movable rail and a press-rebound component with a press-rebound opening function. The elastic positioning part of the press-rebound component is engaged with one end of the base. The elastic movable part of the press-rebound component slides on the upper surface of the base in a directional manner to store force or slides on the upper surface of the base in a directional manner to release force. The press-and-rebound component includes a function switching component for switching between a press-and-rebound on function and a buffer off function. The function switching component comprises a function switching base, a transmission gear, a switching control component, and a rack assembly. The rack assembly is mounted to a fixed rail via a mounting plate. The function switching base is slidably connected to the bottom surface of the base and fixedly connected to the elastic movable part of the press-and-rebound component via a functional connector. The transmission gear is rotatably connected to the function switching base and meshes with the rack assembly. A movable support component is shaft-connected to the transmission gear. The switching control component is shaft-connected to the function switching base. When the movable rail closes, the movable support extends outward from the transmission gear and engages with the directional swing end of the switching control, thus braking the transmission gear on the rack assembly. The connecting swing end of the switching control swings outward as the movable rail closes, causing the directional swing end of the switching control to swing and separate from the movable support, allowing the transmission gear to rotate freely back and forth on the rack assembly. When the movable rail opens, the connecting swing end of the switching control swings inward, causing the directional swing end of the switching control to swing. Simultaneously, the movable support retracts outward and inward, separating from the directional swing end of the switching control, allowing the transmission gear to rotate in a directional manner for forward rolling on the rack assembly.

[0006] Based on the above optimization, the switching control component includes a latch and a return pusher. The latch is connected to the function switching seat via a rotating shaft, and the directional swing end of the latch has a stop protrusion that abuts against the rotating and extending movable support. The connecting swing end of the latch has a locking part that swings relative to the stop protrusion in conjunction with the opening and closing of the movable rail. The return pusher is installed on the function switching seat, and the elasticity of the return pusher acts on the directional swing end of the latch.

[0007] Based on the above optimization, the switching control component includes a first protrusion for forcibly changing the locking action to switch the transmission gear component from a braking state to a free rotation state. The first protrusion is integrally formed on the upper surface of the base. As the movable rail closes, the first protrusion connects with the locking part of the latch and drives the locking part of the latch to swing outward, thereby linking the stop protrusion to separate from the movable support component.

[0008] Based on the above optimization, the switching control component also includes a second protrusion for forcibly changing the locking action so that the transmission gear component switches from a free rotation state to a directional rotation state. The second protrusion is integrally formed on the inner side wall of the base. As the movable rail opens, the second protrusion connects with the locking part and drives the locking part to reset and swing inward, causing the movable support component to retract inward and separate from the stop protrusion.

[0009] Based on the above optimization, the transmission gear component is rotatably connected to the function switching seat via a rotating shaft, and one side of the transmission gear component is provided with a gear part that meshes with the rack assembly, and the other side of the transmission gear component is provided with a limiting protrusion. A limiting groove is formed between the limiting protrusions to limit the rotation extension and retraction range of the movable support component. The movable support component is axially connected to the limiting groove via a positioning shaft.

[0010] Based on the above optimization, the return pusher includes a return push block and a return spring. The return push block is slidably mounted on the function switching seat. One elastic end of the return spring is connected to the function switching seat, and the other elastic end of the return spring is connected to the return push block, so that the return push block is always elastically connected to the directional swing end of the latch.

[0011] Based on the above optimization, the press-rebound component includes a rebound power component, a rebound power slider, and a rotating block pin. One elastic end of the rebound power component is installed at one end of the base, and the other elastic end of the rebound power component is installed on the rebound power slider. The rebound power slider is slidably connected to the upper surface of the base. The connecting end of the rotating block pin is rotatably connected to the rebound power slider. The swinging end of the rotating block pin moves forward, swings to lock, or swings to unlock and slides backward on the base as the rebound power slider moves. The rebound power slider is equipped with a functional connector for pushing the rotating block pin to swing and locking it on the base. The functional connector is slidably connected to the upper surface of the base and its bottom passes through the base while being fixedly connected to the function switching seat by a fixing member. A return spring is connected between the functional connector and the rebound power slider. The functional connector abuts against or separates from the rotating pin as the rebound power slider and the rotating pin move.

[0012] Based on the above optimization, the pressure rebound component is equipped with a synchronous triggering component for synchronous triggering. The synchronous triggering component includes a synchronous triggering shaft, a synchronous triggering block, a synchronous reset elastic element, and a front triggering block. The synchronous triggering shaft is rotatably connected to the base. The synchronous triggering block is mounted on the synchronous triggering shaft and can slide back and forth on the base as the synchronous triggering shaft rotates. The synchronous triggering block is equipped with a synchronous reset elastic element for pushing the rotating pin to swing in a directional manner so as to unlock it from the base. The two elastic ends of the synchronous reset elastic element are respectively connected to the synchronous triggering block and the base. The mounting plate is provided with a front trigger block that can drive the synchronous trigger shaft to rotate and link the synchronous trigger block to move when the movable rail is pressed. The front trigger block is integrally formed on the mounting plate.

[0013] Based on the above optimization, the rebound power slider is equipped with a buffer triggering component for synchronous activation. The buffer triggering component includes a buffer trigger block and a buffer spring. The buffer trigger block is located at the front end of the rebound power slider and is slidably connected to the base. The two elastic ends of the buffer spring are respectively connected to the rebound power slider and the buffer trigger block. The mounting plate is equipped with a rear trigger block that can push the buffer trigger block forward when the movable rail is pulled, and simultaneously cause the rebound power slider to slide forward on the base. The rear trigger block is integrally formed on the mounting plate.

[0014] Based on the above optimization, the base is provided with a sliding groove for the rebound power slider to slide back and forth. The rear end of the sliding groove is connected to an arc groove for the rotating block pin to swing and lock or unlock. The rotating block pin slides along the sliding groove with the rebound power slider and swings into or away from the arc groove.

[0015] Based on the above optimization, the left and right outer sides of the base are respectively provided with guide protrusions for relative movement with the function switching seat, and the left and right sides of the function switching seat are respectively provided with guide grooves that are slidably connected with the guide protrusions.

[0016] The advantages of this utility model are: By applying the function switching component of this structure to the buffer rebound slide rail, pressing the slide rail causes it to rebound and extend a certain distance under the action of the rebound component. The function switching component then activates, causing the movable support to extend outwards while the transmission gear is stopped. The slide rail can be stopped at any position and then pushed back to achieve the storage of the buffer rebound device. After the storage is complete and the slide rail has traveled a certain distance, the buffer device closes the slide rail. The structure is simple, effectively switching between buffer rebound and slide rail functions, and is convenient, reliable, and practical. Furthermore, if the slide rail assembly bends and closes, simply pulling out the slide rail assembly and then pushing it back will also achieve a soft closure. This quiet operation and gentle buffering enhance the user experience. Attached Figure Description

[0017] Figure 1 This is a diagram showing the closed state of a preferred embodiment of the present invention.

[0018] Figure 2 This is a diagram showing the opening state of a preferred embodiment of the present invention.

[0019] Figure 3 This is a fully opened view of a preferred embodiment of the present invention.

[0020] Figure 4 This is a front view of a preferred embodiment of the present invention (with part of the base removed).

[0021] Figure 5This diagram shows the fully released power state of the press-and-rebound component in a preferred embodiment of the present invention.

[0022] Figure 6 This is a diagram showing the power state of the release portion of the press-and-rebound component in a preferred embodiment of the present invention.

[0023] Figure 7 This diagram illustrates the power storage state of the press-and-rebound component in a preferred embodiment of the present invention.

[0024] Figure 8 This is a schematic diagram of the base structure of a preferred embodiment of the present invention.

[0025] Figure 9 This is a schematic diagram showing the relationship between the press-rebound component and the function switching component in a preferred embodiment of the present invention.

[0026] Figure 10 This is a schematic diagram of the function switching component in a preferred embodiment of the present invention.

[0027] Figure 11 This is a partial exploded view of the function switching component in a preferred embodiment of the present invention.

[0028] Figure 12 This is a schematic diagram of the transmission gear component in a braking state in a preferred embodiment of the present invention.

[0029] Figure 13 This is a schematic diagram of the transmission gear component in the unlocked state in a preferred embodiment of the present invention.

[0030] Figure 14 This is a schematic diagram of the transmission gear component in a free-rotating state in a preferred embodiment of the present invention.

[0031] Figure 15 This is an exploded view of the function switching component in a preferred embodiment of the present invention.

[0032] Figure 16 This is a schematic diagram of the transmission gear and movable support in a preferred embodiment of the present invention.

[0033] Figure 17 This is a schematic diagram of the transmission gear component in a preferred embodiment of the present invention.

[0034] Figure 18 This is a structural schematic diagram of the transmission gear component from another angle in a preferred embodiment of the present invention. Detailed Implementation

[0035] The present invention will now be further described with reference to the accompanying drawings.

[0036] According to the appendix Figures 1 to 18As shown, the buffer rebound device for the slide rail of this utility model includes a press-rebound device and a buffer device 2 installed on the slide rail assembly 1. The buffer device 2 is installed on the fixed rail 11 of the slide rail assembly 1. The movable rail 12 of the slide rail assembly 1 is engaged with or disengaged from the damper of the buffer device 2 as it opens and closes. The press-rebound device includes a base 3 adapted to be installed on the movable rail 12 and a press-rebound component 4 with a press-rebound opening function. The elastic positioning part of the press-rebound component 4 is engaged with one end of the base 3, and the elastic movable part of the press-rebound component 4 slides on the upper surface of the base 3 in a directional manner, storing or releasing force.

[0037] Furthermore, the press-and-rebound component 4 is equipped with a function switching component 5 for switching between a press-and-rebound on function and a buffer off function. The function switching component 5 includes a function switching base 51, a transmission gear component 52, a switching control component, and a rack assembly 55. The rack assembly 55 is fitted and installed on the fixed rail 11 via a mounting plate 6. The function switching base 51 is slidably connected to the bottom surface of the base 3 and fixedly connected to the elastic movable part of the press-and-rebound component 4 via a functional connector 56. The transmission gear component 52 is rotatably connected to the function switching base 51 and meshes with the rack assembly 55. The transmission gear component 52 is shaft-connected to a movable support component 57, and the switching control component is shaft-connected to the function switching base 51.

[0038] Furthermore, when the movable rail closes, the movable support 57 extends outward from the transmission gear 52 and engages with the directional swing end of the switching control, thus braking the transmission gear 52 against the rack assembly 55. During this time, the connecting swing end of the switching control swings outward as the movable rail 12 closes, thereby causing the directional swing end of the switching control to swing and separate from the movable support 57, allowing the transmission gear 52 to rotate freely back and forth on the rack assembly 55. When the sliding assembly 1 is pulled, the connecting swing end of the switching control swings inward as the movable rail 12 opens, thereby causing the directional swing end of the switching control to swing. Simultaneously, the movable support 57 retracts outward and inward, separating from the directional swing end of the switching control, allowing the transmission gear 52 to rotate in a directional manner for forward rolling on the rack assembly 55.

[0039] By switching between the three states of the rack assembly 55 and the function switching component 5 of this structure, the slide rail assembly 1 can achieve the functions of accumulating power and buffering at any position, as well as pressing and rebounding.

[0040] Reference Figures 1 to 18As shown, further detailed, the switching control component includes a latch 53 and a return pusher 54. The latch 53 is connected to the function switching seat 51 via a rotating shaft, and the directional swing end of the latch 53 has a stop protrusion 531 that abuts against the rotating and extending movable support 57. The connecting swing end of the latch 53 has a locking part 532 that swings relative to the stop protrusion 531 in conjunction with the opening and closing of the movable rail. The return pusher 54 is mounted on the function switching seat 51, and the elasticity of the return pusher 54 acts on the directional swing end of the latch 53.

[0041] In the optimized solution, the switching control component includes a first protrusion 31 for forcibly changing the action of the latch 53 to switch the transmission gear 52 from a braking state to a free rotation state. The first protrusion 31 is integrally formed on the upper surface of the base 3. As the movable rail 12 closes, the first protrusion 31 connects with the latch 532 of the latch 53 and drives the latch 53 to swing outward, thereby causing the linkage stop protrusion 531 to separate from the movable support 57.

[0042] Furthermore, the switching control also includes a second protrusion 32 for forcibly changing the action of the latch 53 to switch the transmission gear 52 from a free rotation state to a directional rotation state. The second protrusion 32 is integrally formed on the inner sidewall of the base 3. As the movable rail 12 opens, the second protrusion 32 connects with the locking part 532 and drives the locking part 532 to reset and swing inward, causing the movable support 57 to retract inward and separate from the stop protrusion 531.

[0043] The return pusher 54 includes a return push block 541 and a return spring 542. The return push block 541 is slidably mounted on the function switching seat 51. One elastic end of the return spring 542 is connected to the function switching seat 51, and the other elastic end of the return spring 542 is connected to the return push block 541, so that the return push block 541 is always elastically connected to the directional swing end of the latch 53.

[0044] By coordinating the switching control component with the return push component 54 and the transmission gear component 52, the function switching device can effectively achieve power storage and buffer closing even when the relative position of the slide rail assembly 1 is in any state. The structure is simple and the operation is convenient.

[0045] Reference Figures 1 to 18 As shown in the figure, further detailed, the transmission gear component 52 is rotatably connected to the function switching seat 51 via a rotating shaft, and one side of the transmission gear component 52 is provided with a gear part 521 that meshes with the rack assembly 55, and the other side of the transmission gear component 52 is provided with a limiting protrusion 522. A limiting groove 523 is formed between the limiting protrusions 522 to limit the rotation extension and retraction range of the movable support member 57. The movable support member 57 is axially connected to the limiting groove 523 via a positioning shaft.

[0046] The transmission gear 52 and the movable support 57 of this structure are structurally compatible. When the transmission gear 52 rotates clockwise, the movable support 57 can extend outward from the limiting groove 523 around the positioning shaft; when the transmission gear 52 rotates counterclockwise, the movable support 57 can retract inward from the limiting groove 523 around the positioning shaft. The structure is simple, effectively realizes function switching, and is easy to operate.

[0047] Reference Figures 1 to 18 As shown, in the optimized scheme, the press-rebound component 4 includes a rebound power component 41, a rebound power slider 42, and a rotating pin 43. One elastic end of the rebound power component 41 is mounted on one end of the base 3, and the other elastic end of the rebound power component 41 is mounted on the rebound power slider 42, which is slidably connected to the upper surface of the base 3. The connecting end of the rotating pin 43 is rotatably connected to the rebound power slider 42, and the swinging end of the rotating pin 43 moves forward, locks, or unlocks and slides backward on the base 3 as the rebound power slider 42 moves.

[0048] Furthermore, the rebound power slider 42 is equipped with a functional connector 56 for pushing the rotating pin 43 to swing and locking it on the base 3. The functional connector 56 is slidably connected to the upper surface of the base 3, and its bottom passes through the base 3 while being fixedly connected to the function switching seat 51 by a fixing member. A return spring 44 is connected between the functional connector 56 and the rebound power slider 42. The functional connector 56 abuts against or separates from the rotating pin 43 as the rebound power slider 42 and the rotating pin 43 move together.

[0049] In practical applications, the pressure rebound component 4 is equipped with a synchronous triggering component 47 for synchronous triggering. The synchronous triggering component 47 includes a synchronous triggering shaft 471, a synchronous triggering block 472, a synchronous reset elastic element 473, and a front triggering block 61. The synchronous triggering shaft 471 is rotatably connected to the base 3. The synchronous triggering block 472 is mounted on the synchronous triggering shaft 471 and can slide back and forth on the base 3 as the synchronous triggering shaft 471 rotates. The synchronous triggering block 472 is equipped with a synchronous reset elastic element 473 for pushing the rotating pin 43 to swing in a directional manner so as to unlock it from the base 3. The two elastic ends of the synchronous reset elastic element 473 are respectively connected to the synchronous triggering block 472 and the base 3.

[0050] Furthermore, the rebound power slider 42 is equipped with a buffer triggering component for synchronous activation. The buffer triggering component includes a buffer trigger block 45 and a buffer spring 46. The buffer trigger block 45 is located at the front end of the rebound power slider 42 and is slidably connected to the base 3. The two elastic ends of the buffer spring 46 are respectively connected to the rebound power slider 42 and the buffer trigger block 45.

[0051] During this process, the mounting plate 6 is provided with a front actuating block 61 that can drive the synchronous trigger shaft 471 to rotate and trigger the synchronous trigger block 472 to move when the movable rail 12 is pressed, and a rear actuating block 62 that can push the buffer trigger block 45 forward and trigger the rebound power slider 42 to slide forward on the base 3 when the movable rail 12 is pulled. The front actuating block 61 and the rear actuating block 62 are integrally formed on the mounting plate 6.

[0052] In addition, the base 3 is provided with a sliding groove 33 for the rebound power slider 42 to slide back and forth. The rear end of the sliding groove 33 is connected to an arc groove 34 for the rotating block pin 43 to swing and lock or unlock. The rotating block pin 43 slides along the sliding groove 33 to the arc groove 34 or slides away from the arc groove 34 as the rebound power slider 42 moves.

[0053] Furthermore, the left and right outer sides of the base 3 are respectively provided with guide protrusions 35 for relative movement with the function switching seat 51, and the left and right sides of the function switching seat 51 are respectively provided with guide grooves 511 that are slidably connected with the guide protrusions 35.

[0054] The base 3, function switching component 5, and press-rebound component 4 of this structure are structurally compatible, resulting in a compact structure that improves the smoothness and stability of operation between components and ensures the quality of product use.

[0055] That is, when the slide rail assembly 1 is closed, pushing the movable rail 12 inward causes the rear trigger block 62 to trigger the buffer trigger block 45 and push the buffer trigger block 45 forward, thereby driving the rebound power slider 42 forward along the sliding groove 33, and simultaneously pulling the rebound power component 41 to store force. At this time, since the function switching seat 51 and the rebound power slider 42 are relatively stationary, the transmission gear component 52 can rotate clockwise on the rack assembly 55 as the rebound power slider 42 moves. At the same time, the movable support component 57 extends outward as the transmission gear component 52 rotates, abutting against the stop protrusion 531 of the lock 53, thereby locking the transmission gear component 52 and keeping it relatively stationary with the function switching seat 51, so that the transmission gear component 52 is in a braking state. Since the function switching seat 51 is fixedly connected to the function connector 56, the function connector 56 abuts against the rotating block pin 43. As the press-and-rebound component 4 and the function switching component 5 move relative to each other, the rebound power slider 42 continues to move forward, further pulling the rebound power component 41 to accumulate force until the locking part 532 of the latch 53 touches the first protrusion 31. The first protrusion 31 forcibly drives the locking part 532 to swing, thereby changing the position of the latch 53 and causing the movable support component 57 to separate from the stop protrusion 531 of the latch 53, thus switching the transmission gear component 52 from the braking state to the free rotation state. At this time, the rotating block pin 43 is pushed and swings to the arc groove 34, causing the press-and-rebound component 4 to accumulate force and lock. Then, driven by the damper of the buffer device 2, the slide rail assembly 1 slowly closes, realizing the buffer closing function.

[0056] When opened, pressing the slide rail assembly 1 causes the front actuating block 61 to move along the movable rail 12 and touch the synchronous trigger shaft 471, causing the synchronous trigger shaft 471 to rotate. Under the elastic action of the synchronous reset elastic member 473, the synchronous trigger block 472 is pushed backward, thereby pushing the rotating dial 43 to swing, causing the dial pin 43 to disengage from the arc groove 34. Under the reset elastic force of the rebound force member 41, the rebound force slider 42 is driven to slide backward along the sliding groove 33. During this period, the function switching component 5 is activated, the transmission gear 52 rotates counterclockwise on the rack assembly 55, and the movable support member 57 rotates and retracts accordingly. At the same time, it passes the second protrusion 32 of the base 3, which pushes the locking part 532 of the latch 53 back. Under the action of the return push member 54, the transmission gear 52 changes from a free rotation state to a counterclockwise directional rotation state, realizing the smooth opening of the slide rail assembly 1.

[0057] At this time, if the slide rail assembly 1 is pushed inward, the transmission gear 52 rotates clockwise, causing the movable support 57 to extend outward and stop the transmission gear 52, so that the transmission gear 52 is in a braking state again, causing the rebound power 41 of the pressing rebound component 4 to stop and be in a power storage state. In conjunction with the damper of the buffer device 2, the buffer closure can be achieved.

[0058] Thus, the function switching component 5, employing this structure and working in conjunction with the rack and pinion assembly 55 throughout its entire operation, enables the slide rail assembly 1 to achieve both a buffered closure after charging at any position and a press-to-open mechanism. The structure is simple, effectively switching between slide rail buffer and rebound functions, and is convenient, reliable, and practical. Furthermore, if the slide rail assembly 1 bends and closes, simply pulling it out and then pushing it back in will also achieve a buffered closure. The operation is quiet and the buffering is gentle, enhancing the user experience.

[0059] The above specific embodiments are only specific implementations of the present utility model with better effects. Any structure that is the same as or equivalent to the buffer rebound device for the slide rail of the present utility model is within the protection scope of the present utility model.

Claims

1. A buffer rebound device for a slide rail, comprising a press-rebound device mounted on a slide rail assembly (1) and a buffer device (2) having a buffer closing function, wherein the buffer device (2) is mounted on a fixed rail (11) of the slide rail assembly (1), and the movable rail (12) of the slide rail assembly (1) is engaged with or disengaged from the damper of the buffer device (2) as it opens and closes, characterized in that: The press-rebound device includes a base (3) adapted to be installed on the movable rail (12) and a press-rebound component (4) with a press-rebound opening function. The elastic positioning part of the press-rebound component (4) is fastened to one end of the base (3), and the elastic moving part of the press-rebound component (4) slides on the upper surface of the base (3) in a directional manner or slides on the upper surface of the base (3) in a directional manner. The press-rebound component (4) is provided with a function switching component (5) for switching between the press-rebound opening function and the buffer closing function. The function switching component (5) includes a function switching seat (51), a transmission gear component (52), a switching control component, and a rack assembly (55). The rack assembly (55) is adapted to the fixed rail (11) through the mounting plate (6). The function switching seat (51) is slidably connected to the bottom surface of the base (3) and fixedly connected to the elastic movable part of the press-rebound component (4) through the function connector (56). The transmission gear component (52) is rotatably connected to the function switching seat (51) and meshes with the rack assembly (55). The transmission gear component (52) is shaft-connected to a movable support component (57). The switching control component is shaft-connected to the function switching seat (51). When the movable rail closes, the movable support (57) extends outward from the transmission gear (52) and is stopped by the directional swing end of the switching control, so that the transmission gear (52) is stopped on the rack assembly (55). When the movable rail (12) closes, the connecting swing end of the switching control swings outward, thereby linking the directional swing end of the switching control to swing and separating from the movable support (57), so that the transmission gear (52) can be in a free rotation state that can roll back and forth on the rack assembly (55). When the movable rail (12) opens, the connecting swing end of the switching control swings inward to reset, thereby linking the directional swing end of the switching control to swing. At the same time, the movable support (57) retracts outward and inward and separates from the directional swing end of the switching control, so that the transmission gear (52) is in a directional rotation state for rolling forward on the rack assembly (55).

2. The buffer rebound device for the slide rail according to claim 1, characterized in that: The switching control includes a latch (53) and a return pusher (54). The latch (53) is connected to the function switching seat (51) via a rotating shaft. The directional swing end of the latch (53) has a stop protrusion (531) that abuts against the rotating and extended movable support (57). The connecting swing end of the latch (53) has a locking part (532) that swings relative to the stop protrusion (531) in conjunction with the opening and closing of the movable rail. The return pusher (54) is installed on the function switching seat (51), and the elasticity of the return pusher (54) acts on the directional swing end of the latch (53).

3. The buffer rebound device for the slide rail according to claim 2, characterized in that: The switching control includes a first protrusion (31) for forcibly changing the action of the latch (53) to switch the transmission gear (52) from the braking state to the free rotation state. The first protrusion (31) is integrally formed on the upper surface of the base (3). The first protrusion (31) is connected to the latch (532) of the latch (53) as the movable rail (12) closes and drives the latch (532) of the latch (53) to swing outward, thereby linking the stop protrusion (531) and the movable support (57) to separate.

4. The buffer rebound device for the slide rail according to claim 2, characterized in that: The switching control also includes a second protrusion (32) for forcibly changing the action of the latch (53) to switch the transmission gear (52) from a free rotation state to a directional rotation state. The second protrusion (32) is integrally formed on the inner side wall of the base (3). The second protrusion (32) connects with the locking part (532) as the movable rail (12) opens and drives the locking part (532) to reset and swing inward, causing the movable support (57) to retract inward and separate from the stop protrusion (531).

5. The buffer rebound device for the slide rail according to claim 2, characterized in that: The transmission gear (52) is rotatably connected to the function switching seat (51) via a rotating shaft. One side of the transmission gear (52) is provided with a gear part (521) that meshes with the rack assembly (55), and the other side of the transmission gear (52) is provided with a limiting protrusion (522). A limiting groove (523) is formed between the limiting protrusions (522) to limit the rotation extension and retraction range of the movable support (57). The movable support (57) is axially connected to the limiting groove (523) via a positioning shaft. The return pusher (54) includes a return push block (541) and a return spring (542). The return push block (541) is slidably mounted on the function switching seat (51). One elastic end of the return spring (542) is connected to the function switching seat (51), and the other elastic end of the return spring (542) is connected to the return push block (541), so that the return push block (541) is always elastically connected to the directional swing end of the latch (53).

6. The buffer rebound device for the slide rail according to claim 1, characterized in that: The press-rebound component (4) includes a rebound power component (41), a rebound power slider (42), and a rotating block pin (43). One elastic end of the rebound power component (41) is installed on one end of the base (3), and the other elastic end of the rebound power component (41) is installed on the rebound power slider (42). The rebound power slider (42) is slidably connected to the upper surface of the base (3). The connecting end of the rotating block pin (43) is rotatably connected to the rebound power slider (42). The swing end of the rotating block pin (43) moves forward, swings to lock, or swings to unlock and slides backward on the base (3) as the rebound power slider (42) moves. The rebound power slider (42) is equipped with a functional connector (56) for pushing the rotating block pin (43) to swing and lock it on the base (3). The functional connector (56) is slidably connected to the upper surface of the base (3) and its bottom passes through the base (3) while being fixedly connected to the function switching seat (51) by a fixing member. A reset spring (44) is connected between the functional connector (56) and the rebound power slider (42). The functional connector (56) abuts against or separates from the rotating pin (43) as the rebound power slider (42) moves.

7. The buffer rebound device for the slide rail according to claim 5, characterized in that: The pressure rebound component (4) is provided with a synchronous triggering component (47) for synchronous triggering. The synchronous triggering component (47) includes a synchronous triggering shaft (471), a synchronous triggering block (472), a synchronous reset elastic element (473), and a front triggering block (61). The synchronous triggering shaft (471) is rotatably connected to the base (3). The synchronous triggering block (472) is mounted on the synchronous triggering shaft (471) and can slide back and forth on the base (3) as the synchronous triggering shaft (471) rotates. The synchronous triggering block (472) is equipped with a synchronous reset elastic element (473) for pushing the rotating pin (43) to swing in a directional manner so as to unlock it from the base (3). The two elastic ends of the synchronous reset elastic element (473) are respectively connected to the synchronous triggering block (472) and the base (3). The mounting plate (6) is provided with a front trigger block (61) that can push the synchronous trigger shaft (471) to rotate and link the synchronous trigger block (472) to move when the movable rail (12) is pressed. The front trigger block (61) is integrally formed on the mounting plate (6).

8. The buffer rebound device for the slide rail according to claim 6, characterized in that: The rebound power slider (42) is equipped with a buffer triggering component for synchronous triggering. The buffer triggering component includes a buffer trigger block (45) and a buffer spring (46). The buffer trigger block (45) is located at the front end of the rebound power slider (42) and is slidably connected to the base (3). The two elastic ends of the buffer spring (46) are respectively connected to the rebound power slider (42) and the buffer trigger block (45). The mounting plate (6) is provided with a rear trigger block (62) that can push the buffer trigger block (45) forward when the movable rail (12) is pulled, and simultaneously link the rebound power slider (42) to slide forward on the base (3). The rear trigger block (62) is integrally formed on the mounting plate (6).

9. The buffer rebound device for the slide rail according to claim 5, characterized in that: The base (3) is provided with a sliding groove (33) for the rebound power slider (42) to slide back and forth. The rear end of the sliding groove (33) is connected to an arc groove (34) for the rotating block pin (43) to swing and lock or unlock. The rotating block pin (43) slides along the sliding groove (33) with the rebound power slider (42) and swings into or away from the arc groove (34).

10. The buffer rebound device for the slide rail according to claim 5, characterized in that: The base (3) is provided with guide protrusions (35) on the left and right sides for relative movement with the function switching seat (51), and guide slots (511) are provided on the left and right sides of the function switching seat (51) for sliding connection with the guide protrusions (35).

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