Slide rail buffer

Abstract

The utility model provides a slide rail buffer relates to the field of slide rail buffer. Including fixed part, its both sides along the direction of sliding are provided with slide cylinder, and the middle part extends along the direction of sliding and forms the guide plate, the side of guide plate to the inside strip is provided with the guide groove, the beginning of guide groove is provided with locking lug, first sliding part, it is slidably arranged in fixed part one side, its both sides along the direction of sliding are through the compression spring rod sliding and are equipped in the slide cylinder, the other end of compression spring rod and slide rail inside strip abut, first sliding part interval is provided with movable lock nail and guide lock nail, movable lock nail and guide lock nail all can be slidably matched in the guide groove, and movable lock nail can selectively lock in locking lug, second sliding part is slidably arranged between fixed part and first sliding part, and is elastically connected with first sliding part through compression spring. Can improve the ejection force transmission efficiency, ensure that inside strip can be effectively driven to eject in place, has the advantages of compact structure, locking reliable, unlocking smooth simultaneously.

Description

Technical Field

[0001] This utility model relates to the field of slide rail buffers, and more specifically, to a slide rail buffer. Background Technology

[0002] Drawer slides are widely used in furniture such as drawers and cabinets, providing a smooth opening and closing experience for drawers or cabinet doors. Modern drawer slides are usually equipped with a soft-close function, which slows down the drawer when closing and achieves a "soft close," and automatically pops out a distance when opening, making it easier for users to grab.

[0003] Existing drawer slide rebound mechanisms have some technical defects. For example, some rebound mechanisms, due to insufficient spring force or unreasonable structural design, can only drive the middle bar of the drawer slide, but cannot effectively drive the lighter inner guide bar to fully spring into place, causing the drawer to open awkwardly. In addition, to achieve the locking and releasing functions, common locking structures may be relatively complex, or require excessive force to unlock, affecting user experience and component lifespan. Therefore, it is necessary to design a drawer slide damper with a reasonable structure, efficient spring force transmission, reliable locking, and smooth unlocking. Utility Model Content

[0004] The purpose of this utility model is to provide a slide rail buffer that can improve the efficiency of ejection force transmission, ensure that the inner bar can be effectively driven and ejected into place, and has the advantages of compact structure, reliable locking and smooth unlocking.

[0005] The embodiments of this utility model are implemented as follows: This application provides a slide rail damper, installed on a slide rail, for providing a buffering and rebound function for the slide rail, wherein the slide rail includes an outer strip, a middle strip, and an inner strip that are slidably connected in sequence; the damper includes: A fastener is used to fix the outer strip of the slide rail. It has slide cylinders on both sides along the sliding direction, and a guide plate is formed by extending the middle part along the sliding direction. A guide groove is opened on the side of the guide plate facing the inner strip. A locking protrusion is provided at the beginning of the guide groove. A first sliding member is slidably disposed on one side of the fixed member. Both sides of the first sliding member are slidably inserted into the slide cylinder via compression spring rods along the sliding direction. The other end of the compression spring rods abuts against the middle strip of the slide rail. Movable locking pins and guide locking pins are spaced apart along the sliding direction on the side of the first sliding member facing the fixed member. Both the movable locking pins and the guide locking pins can be slidably engaged with the guide groove, and the movable locking pins can selectively lock onto the locking protrusion. The second sliding member is slidably disposed between the fixed member and the first sliding member, and is elastically connected to the first sliding member by a compression spring.

[0006] Furthermore, based on the aforementioned scheme, the first sliding member includes a sliding plate and a spring mounting plate. The sliding plate is provided with the movable locking pin and the guide locking pin, and the compression spring rod is provided on both axial sides of the sliding plate. The spring mounting plate is connected to one end of the sliding plate near the second sliding member.

[0007] Furthermore, based on the aforementioned scheme, the sliding plate has two fan-shaped mounting slots on the side facing the fixing member; the movable locking pin and the guide locking pin are rotatably installed in the two mounting slots respectively, and one end of each locking pin is hinged to the center of the corresponding mounting slot; wherein, the mounting slot for installing the guide locking pin has an arc-shaped hole on the side away from its center, one end of the guide locking pin is provided with a limiting shaft passing through the arc-shaped hole, and the outer end of the limiting shaft is provided with a limiting part with a diameter larger than the diameter of the arc-shaped hole; The end of the guide groove is curved in an arc shape, and the width of the curved section is the same as the width of the arc-shaped hole.

[0008] Furthermore, based on the aforementioned scheme, limit plates are provided on both sides of the spring mounting plate. The two limit plates are integrally formed with the spring mounting plate and form a positioning gap between the end near the second sliding member and the second sliding member. The fixing member has two protrusions near the beginning of the guide groove. The two protrusions are arranged opposite each other in a direction perpendicular to the sliding direction, and the two protrusions correspond one-to-one with the two positioning gaps in the sliding direction.

[0009] Furthermore, based on the aforementioned scheme, two compression springs are provided, and the two compression springs are arranged side by side.

[0010] Furthermore, based on the aforementioned scheme, the width of the beginning of the guide groove extends along a side perpendicular to the sliding direction, and the extension direction is consistent with the bending direction of the end of the guide groove, so as to form a wide portion that accommodates the locking protrusion. The locking protrusion is arranged in an inverted V shape along the sliding direction (slightly inclined relative to the axial direction); the side of the wide part opposite to the V-shaped angle of the locking protrusion forms a V-shaped slide with it, and the outer angle of the V-shaped slide is offset from its inner angle, so that the movable locking pin can fall into the recess of the V-shaped slide and lock itself, and after the first sliding member is slightly compressed, it slides out along one side of the V-shaped slide and then moves along the guide groove. When resetting, it slides in along the other side of the V-shaped slide and locks.

[0011] Furthermore, based on the aforementioned scheme, the first sliding member is provided with a first elastic element that is bent in a serpentine shape on the opposite side of the two compression spring rods, and the first elastic element is configured to abut against the middle strip of the slide rail.

[0012] Furthermore, based on the aforementioned scheme, the compression spring rod includes a rod body and a spring sleeved on the outside of the rod body, the rod body is connected to the sliding plate, and the length of the spring in its natural state is greater than the length of the rod body.

[0013] Furthermore, based on the aforementioned scheme, the second slider is provided with two curved second elastic members on the side facing the first slider. The two second elastic members are located on both sides of the compression spring and are configured to abut against the two limiting plates.

[0014] Furthermore, based on the aforementioned scheme, the second sliding member is slidably engaged with the inner side of the fixed member on both sides along the sliding direction via strip rails.

[0015] Compared with the prior art, the embodiments of this utility model have at least the following advantages or beneficial effects: This application provides a stable installation benchmark for the whole through a fixing component. Its slide cylinder provides a guide for the compression spring rod of the first sliding component. The second sliding component is elastically connected to the first sliding component through a compression spring, so that the elastic force of the compression spring rod and the elastic force of the compression spring form a double superposition. Compared with the early single elastic force structure, the overall elastic force output is significantly improved, ensuring that the inner bar of the slide rail can be effectively ejected into place. Through the cooperation of the movable locking pin of the first sliding component and the locking protrusion of the guide groove of the fixing component, the elastic force can be stably stored. The sliding cooperation between the guide locking pin and the guide groove ensures that the first sliding component moves along a fixed trajectory without jamming, completely eliminating the elastic force waste caused by structural offset and jamming in the early stage. By directly abutting the compression spring rod of the first sliding component with the middle bar of the slide rail, the elastic force is directly transmitted. With the superposition of the auxiliary elastic force of the compression spring, the external force required to drive the middle bar into place is greatly reduced. It is not necessary to apply a large force like the early rebound device, which improves the convenience of operation, while reducing the wear of slide rail components caused by forceful operation and extending the overall service life of the slide rail. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of the slide rail buffer according to an embodiment of the present invention; Figure 2 This is a top view of the slide rail buffer in an embodiment of the present invention when it is extended; Figure 3 This is a top view of the slide rail buffer during compression in an embodiment of this utility model; Figure 4 This is a schematic diagram of the structure of the fastener in an embodiment of the present utility model; Figure 5 This is a top view of the fastener according to an embodiment of the present utility model; Figure 6 This is a top view of the first sliding member according to an embodiment of the present utility model; Figure 7 This is a bottom view of the first sliding member according to an embodiment of the present utility model; Figure 8 This is a schematic diagram of the structure of the second sliding member in an embodiment of this utility model.

[0018] Icons: 1-Fixed component, 11-Slide cylinder, 12-Guide plate, 13-Guide groove, 131-Wide section, 132-V-shaped slide, 14-Locking protrusion, 15-Protrusion, 2-First sliding component, 201-Sliding plate, 202-Spring mounting plate, 203-Mounting groove, 204-Arc-shaped hole, 205-Limiting plate, 206-Positioning gap, 21-Compression spring rod, 22-Modible locking pin, 23-Guide locking pin, 231-Limiting shaft, 24-First elastic component, 3-Second sliding component, 31-Second elastic component, 32-Strip rail plate, 4-Compression spring. Detailed Implementation

[0019] The embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0020] Please refer to Figures 1-8 The diagram shown is a schematic of the overall structure of the slide rail buffer. This embodiment provides a slide rail damper, installed on a slide rail, for providing a buffering and rebound function for the slide rail. The slide rail includes an outer strip, a middle strip, and an inner strip that are slidably connected in sequence; the damper includes: The fastener 1 is used to fix the outer strip of the slide rail. It has slide cylinders 11 on both sides along the sliding direction, and the middle part extends along the sliding direction to form a guide plate 12. The guide plate 12 has a guide groove 13 on the side facing the inner strip. A locking protrusion 14 is provided at the beginning of the guide groove 13. The first sliding member 2 is slidably disposed on one side of the fixed member 1. Both sides of the first sliding member 2 are slidably inserted into the slide cylinder 11 through the spring rod 21 along the sliding direction. The other end of the spring rod 21 abuts against the middle strip of the slide rail. The side of the first sliding member 2 facing the fixed member 1 is provided with movable locking pins 22 and guide locking pins 23 at intervals along the sliding direction. Both movable locking pins 22 and guide locking pins 23 can be slidably engaged with the guide groove 13, and the movable locking pins 22 can be selectively locked to the locking protrusion 14. The second sliding member 3 is slidably disposed between the fixed member 1 and the first sliding member 2, and is elastically connected to the first sliding member 2 by a compression spring 4.

[0021] The following will further describe a slide rail buffer according to this exemplary embodiment.

[0022] In some embodiments, this slide rail buffer is installed on a slide rail composed of outer, middle, and inner bars that are slidably connected in sequence. The core components include a fixing member 1, a first sliding member 2, and a second sliding member 3. The fixing member 1 is used to fix and connect the outer bars of the slide rail. It has sliding cylinders 11 on both sides along the sliding direction, and extends in the middle to form a guide plate 12 with a guide groove 13. A locking protrusion 14 is provided at the beginning of the guide groove 13. This structure provides a stable installation reference for the buffer. The sliding cylinders 11 provide guidance for the sliding of the first sliding member 2. The guide groove 13 and the locking protrusion 14 cooperate to achieve precise control of elastic energy storage and release, avoiding elastic energy waste. The first sliding member 2 is slidably mounted on one side of the fixed member 1. Both sides slide through the sliding cylinder 11 via spring rods 21 and abut against the middle bar. A movable locking pin 22 and a guide locking pin 23 are provided on the side facing the fixed member 1 (both cooperate with the guide groove 13; the movable locking pin 22 can be locked to the protrusion). The spring rod 21 directly transmits the initial elastic force to the middle bar, solving the defect of early rebounders lacking direct elastic force transmission. The locking cooperation between the movable locking pin 22 and the locking protrusion 14 achieves elastic energy storage, and the guide locking pin 23 ensures accurate sliding trajectory, avoiding elastic force loss due to jamming. The second sliding member 3 is slidably mounted between the fixed member 1 and the first sliding member 2, and is elastically connected to the first sliding member 2 via a compression spring 4. The compression spring 4 and the spring rod 21 form a double elastic force superposition, significantly improving the overall elastic force output compared to the early single elastic force structure. This allows the inner bar to be ejected into place under the superimposed elastic force, while reducing the external force required to drive the middle bar by more than 50%, completely solving the problem of needing a large force to drive the middle bar.

[0023] In a preferred embodiment, the first sliding member 2 includes a sliding plate 201 and a spring mounting plate 202. The sliding plate 201 is provided with a movable locking pin 22, a guide locking pin 23, and a compression spring rod 21. The spring mounting plate 202 is connected to the end of the sliding plate 201 near the second sliding member 3. This structure realizes functional partitioning. The sliding plate 201 focuses on sliding guidance and locking cooperation, ensuring that the locking pin and the guide groove 13 are precisely fitted and the compression spring rod 21 slides stably. The spring mounting plate 202 provides a positioning of the compression spring 4 perpendicular to the sliding direction, avoiding the deviation of the elastic force direction caused by the offset of the compression spring 4, ensuring that the elastic force is efficiently transmitted along the sliding direction of the slide rail, and further improving the ejection stability.

[0024] In a preferred embodiment, the sliding plate 201 has two fan-shaped mounting slots 203 on the side facing the fixing member 1. The movable locking pin 22 and the guide locking pin 23 are rotatably mounted in the slots, and one end of each locking pin is hinged to the center of the corresponding mounting slot 203. The mounting slot 203 of the guide locking pin 23 has an arc-shaped hole 204 on the side away from the center. One end of the guide locking pin 23 is provided with a limiting shaft 231 that passes through the arc-shaped hole 204. The guide locking pin 23 has a limiting part with a diameter larger than that of the arc-shaped hole 204 at its outer end. The end of the guide slot 13 is curved and its width is consistent with that of the arc-shaped hole 204. The fan-shaped mounting slots 203 allow the locking pin to rotate flexibly around the center to adapt to changes in the trajectory of the guide slot 13 (such as end curvature). The arc-shaped hole 204 and the limiting shaft 231 cooperate to limit the rotation angle of the guide locking pin 23, preventing excessive rotation and disengagement from the guide slot 13. The limiting part prevents the limiting shaft 231 from disengaging. The bending width at the end of the guide groove 13 matches the arc-shaped hole 204, ensuring that the guide pin 23 slides without gaps and avoids elastic loss due to pin jamming, thus ensuring a continuous and smooth ejection process.

[0025] In a preferred embodiment, the spring mounting plate 202 is provided with integrally formed limiting plates 205 on both sides, and the two limiting plates 205 form positioning gaps 206 with the second sliding member 3 respectively. The fixing member 1 has two opposing protrusions 15 near the beginning of the guide groove 13, and the two protrusions 15 correspond one-to-one with the two positioning gaps 206 in the sliding direction. When the first sliding member 2 is reset, the protrusions 15 are embedded in the positioning gaps 206, and the limiting effect of the gap sidewall corrects the offset of the first sliding member 2 (such as left or right offset), ensuring accurate alignment of the locking pin and the guide groove 13 after each reset, avoiding locking failure or spring force transmission deviation caused by offset, and improving the long-term consistency of the buffer.

[0026] As a preferred implementation, two compression springs 4 are provided and arranged side by side. Compared with a single compression spring 4, the double spring structure doubles the elastic force reserve. At the same time, the side-by-side arrangement ensures that the elastic force is evenly distributed along the sliding direction, avoiding sliding tilt caused by excessive elastic force on one side. After superimposing the elastic force of the compression spring rod 21, the overall elastic force output can meet the ejection requirements of slide rails of different specifications (such as those with a length of 300-800mm).

[0027] In a preferred embodiment, the guide groove 13 extends to one side along the vertical sliding direction to form a wide portion 131 for accommodating the locking protrusion 14. The locking protrusion 14 is inverted V-shaped, with rounded transitions at the corners and a slight axial inclination. A V-shaped slide is formed on the side opposite to the V-shaped corner of the wide portion 131 and the locking protrusion 14. The outer corner of the V-shaped slide 132 is offset from its inner corner, so that the movable locking pin 22 can fall into the recess of the V-shaped slide 132 and lock itself. After the first sliding member 2 is slightly compressed, it slides out along one side of the V-shaped slide 132 and then moves along the guide groove 13. When resetting, it slides in along the other side of the V-shaped slide 132 and locks.

[0028] Specifically, the length of the side of the V-shaped angle of the locking protrusion 14 closest to the extension direction of the width portion 131 is shorter than the length of the other side, so that the movable locking pin 22 can only slide out from the shorter side, while the longer side may block and limit it; and the width portion 131 and the side opposite to the V-shaped angle of the locking protrusion 14 are provided with two extension grooves extending away from the locking protrusion 14. The extension grooves further optimize the sliding trajectory of the locking pin, avoid jamming during unlocking and sliding in, ensure timely release of elasticity, and improve the user's operating feel. The two extension grooves are connected to the guide groove 13, and their middle connecting part is bent to form a V-shaped slide 132 with the V-shaped angle. The inverted V-shaped locking protrusion 14 cooperates with the V-shaped slide, so that the movable locking pin 22 can fall into the recess of the slide and lock itself, ensuring that there is no accidental unlocking during energy storage; when the first sliding member 2 is slightly compressed, the movable locking pin 22 slides out along one side of the slide, and slides in along the other side to lock during reset.

[0029] In a preferred embodiment, the first sliding member 2 is provided with a serpentine first elastic member 24 on the opposite side of the compression spring rod 21. The first elastic member 24 is configured to abut against the middle bar of the slide rail. The serpentine structure has multi-segment elastic deformation characteristics. Compared with the straight elastic member, its elastic force output is softer and its stroke is longer. Based on the elastic force of the compression spring rod 21, the first elastic member 24 can provide an additional 15%-20% elastic force, while buffering the impact when the middle bar slides (such as the collision when the slide rail extends to the limit position), reducing component wear, and extending the service life of the slide rail and the buffer.

[0030] In a preferred embodiment, the aforementioned compression spring rod 21 includes a rod body and a spring sleeved on the outside. The rod body is connected to a sliding plate 201, and the length of the spring in its natural state is greater than the length of the rod body. The longer natural length of the spring allows it to make slight contact with the center bar before the slide rail extends, forming a pre-elastic force. When the slide rail extends, the spring first provides elastic force through deformation, and the rod body then bears the pressure. This avoids the initial elastic force gap caused by the rod body being stressed first and the spring acting later, ensuring that the slide rail has stable elastic support from the initial extension stage, further reducing the initial external force required to drive the center bar.

[0031] In a preferred embodiment, the second sliding member 3 is provided with two curved second elastic members 31 on the side facing the first sliding member 2. The two second elastic members 31 are located on both sides of the compression spring 4 and are configured to abut against the two limiting plates 205. The curved structure allows the second elastic members 31 to buffer the collision between the first sliding member 2 and the second sliding member 3 (such as the impact force at the moment of unlocking) through their own deformation when the compression spring 4 extends and retracts, avoiding noise caused by rigid contact; at the same time, the second elastic members 31 can assist the compression spring 4 in pushing the first sliding member 2 to reset, improving the reset speed while ensuring a smooth and uninterrupted reset process.

[0032] In a preferred embodiment, the second sliding member 3 is slidably engaged with the inner side of the fixing member 1 via strip rails 32 on both sides along the sliding direction. The strip rails 32 and the inner side of the fixing member 1 form a surface contact sliding, which improves sliding stability compared to a point contact structure and prevents the second sliding member 3 from shifting vertically during sliding. At the same time, the strip rails 32 restrict the sliding direction of the second sliding member 3, ensuring that the elastic force of the compression spring 4 is transmitted entirely along the sliding direction without lateral force loss, further ensuring the overall elastic force output efficiency.

[0033] The working principle of this embodiment when applied to a slide rail: Phase 1: Closing drawers and energy storage When the drawer is open, the damper is in the extended position. At this time, the compression spring 4 is in a natural or slightly compressed state, and the movable locking pin 22 on the first sliding member 2 is located at the end of the guide groove 13. When the user pushes the drawer to close, the middle rail of the slide slides inward relative to the fixed outer rail. The inner end face of the middle rail contacts the ends of the compression spring rods 21 on both sides of the first sliding member 2 and applies an inward pushing force to it. This pushing force pushes the entire first sliding member 2 to slide inward (towards the fixed member 1) along the slide cylinder 11 on the fixed member 1. Since the second sliding member 3 is connected to the first sliding member 2 through the compression spring 4, the movement of the first sliding member 2 begins to compress the compression spring 4 located between it and the second sliding member 3. At this time, the second sliding member 3 may also slide backward inside the fixed member 1. During this process, the user's pushing force (kinetic energy) is gradually converted into the elastic potential energy of the compression spring 4 and stored. During the inward sliding of the first sliding member 2, the movable locking pin 22 and the guide locking pin 23 on it move synchronously along the guide groove 13 on the guide plate 12 of the fixed member 1. The trajectory of the guide groove 13 controls the movement path of the first slider 2. When the drawer is fully closed, the first slider 2 also reaches the innermost end of its travel. At this time, the movable locking pin 22 slides precisely into the recess of the V-shaped slide 132 formed by the locking protrusion 14 at the beginning of the guide groove 13. Due to the self-locking effect of the V-shaped structure, the movable locking pin 22 is reliably locked in this position. At this time, the compression spring 4 is in its maximum compression state, storing the maximum elastic potential energy, and the entire mechanism is stably locked in the energy-storing state. The drawer is thus kept in the closed position.

[0034] Phase Two: Opening the Drawer and Releasing Energy (Rebound) When a user needs to open the drawer, they will first press the drawer slightly inward, or directly apply an outward pull. This action is transmitted to the damper, manifesting as a tiny but crucial inward push or disturbance on the spring rod 21. This tiny compressive force causes the first slider 2 to produce a very slight backward displacement. It is this displacement that causes the movable locking pin 22, which is stuck in the V-shaped recess, to be pushed upward and slide out along the short, pre-set ramp of the V-shaped slide rail 132, thereby releasing the locking state. This design makes the force required for unlocking very small, providing a light user experience. Once the lock is released, the potential energy stored in the highly compressed spring 4 is released instantly. The spring extends violently, pushing the second slider 3 and the first slider 2 as a whole to slide at high speed along the slide cylinder 11 in the direction outside the guide rail (i.e., the drawer opening direction). The first slider 2 transmits this powerful, instantaneous ejection force to the slide rail center bar it abuts through the spring rods 21 on both sides. This force is sufficient to overcome the static friction and inertia of the entire slide rail system (middle bar and inner bar). Since the middle bar and inner bar are slidably connected, when the middle bar is pushed forcefully, it will drive the inner bar to move together. The abundant and instantaneous ejection force provided by the embodiments of this application ensures that not only the middle bar, but also the inner bar, which has less linkage and requires instantaneous burst force to start, can be effectively driven, thereby realizing the drawer fully opening into place. During the reset process of the first sliding member 2, the movable locking pin 22 and the guide locking pin 23 slide along the guide groove 13 again, eventually returning to the end of the guide groove 13 to prepare for the next closing cycle.

[0035] Furthermore, unless otherwise explicitly specified or limited, the terms "installation" and "connection" in this application embodiment should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. The terms "upper," "lower," "left," "right," "inner," "outer," and "side," etc., are merely for reference to the direction in the accompanying drawings or the usual placement of the product during use. They are only for clearly describing this application and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limitations on this application. The terms "first," "second," etc., are only used for distinguishing descriptions and should not be construed as indicating or implying relative importance; "multiple" refers to at least two. In this application embodiment, the limitations on relative positional relationships such as parallel, perpendicular, and aligned are all relative to the current technological level and are not absolutely strict limitations. Slight deviations are allowed; approximations of parallel, perpendicular, and aligned are all acceptable. For example, "A and B are parallel" means that A and B are parallel or approximately parallel, and the angle between A and B can be between 0 degrees and 10 degrees.

[0036] The above are only some embodiments and implementation methods of this application. The protection scope of this application is not limited thereto. In the absence of conflict, the embodiments and features in the embodiments of this application can be combined with each other. Any combination of features in different embodiments is also within the protection scope of this application. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the protection scope of this application.

Claims

1. A slide rail buffer, characterized in that, Mounted on a slide rail, it provides a buffer and rebound function for the slide rail, wherein the slide rail includes an outer strip, a middle strip, and an inner strip that are slidably connected in sequence; the buffer includes: A fastener is used to fix the outer strip of the slide rail. It has slide cylinders on both sides along the sliding direction, and a guide plate is formed by extending the middle part along the sliding direction. A guide groove is opened on the side of the guide plate facing the inner strip. A locking protrusion is provided at the beginning of the guide groove. A first sliding member is slidably disposed on one side of the fixed member. Both sides of the first sliding member are slidably inserted into the slide cylinder via compression spring rods along the sliding direction. The other end of the compression spring rods abuts against the middle strip of the slide rail. Movable locking pins and guide locking pins are spaced apart along the sliding direction on the side of the first sliding member facing the fixed member. Both the movable locking pins and the guide locking pins can be slidably engaged with the guide groove, and the movable locking pins can selectively lock onto the locking protrusion. The second sliding member is slidably disposed between the fixed member and the first sliding member, and is elastically connected to the first sliding member by a compression spring.

2. The slide rail buffer according to claim 1, characterized in that, The first sliding member includes a sliding plate and a spring mounting plate. The sliding plate is provided with the movable locking pin and the guide locking pin. The compression spring rod is provided on both axial sides of the sliding plate. The spring mounting plate is connected to one end of the sliding plate near the second sliding member.

3. The slide rail buffer according to claim 2, characterized in that, The sliding plate has two fan-shaped mounting slots on the side facing the fixing member; the movable locking pin and the guide locking pin are rotatably installed in the two mounting slots, and one end of each locking pin is hinged to the center of the corresponding mounting slot; wherein, the mounting slot for installing the guide locking pin has an arc-shaped hole on the side away from its center, and one end of the guide locking pin is provided with a limiting shaft passing through the arc-shaped hole, and the outer end of the limiting shaft is provided with a limiting part with a diameter larger than the diameter of the arc-shaped hole; The end of the guide groove is curved in an arc shape, and the width of the curved section is the same as the width of the arc-shaped hole.

4. The slide rail buffer according to claim 2, characterized in that, Limiting plates are provided on both sides of the spring mounting plate. The two limiting plates are integrally formed with the spring mounting plate and form a positioning gap between the end near the second sliding member and the second sliding member. The fixing member has two protrusions near the beginning of the guide groove. The two protrusions are arranged opposite each other in a direction perpendicular to the sliding direction, and the two protrusions correspond one-to-one with the two positioning gaps in the sliding direction.

5. The slide rail buffer according to claim 1, characterized in that, Two compression springs are provided, and the two compression springs are arranged side by side.

6. The slide rail buffer according to claim 1, characterized in that, The width of the beginning of the guide groove extends along one side perpendicular to the sliding direction, and the extension direction is consistent with the bending direction of the end of the guide groove, so as to form a wide portion that accommodates the locking protrusion. The locking protrusion is arranged in an inverted V shape along the sliding direction; the side of the wide part opposite to the V-shaped angle of the locking protrusion forms a V-shaped slide, and the outer angle of the V-shaped slide is offset from its inner angle, so that the movable locking pin can fall into the recess of the V-shaped slide and lock itself. After the first sliding member is slightly compressed, it slides out along one side of the V-shaped slide and then moves along the guide groove. When resetting, it slides in along the other side of the V-shaped slide and locks.

7. The slide rail buffer according to claim 2, characterized in that, The first sliding member has a first elastic element that is bent in a serpentine shape on the side corresponding to the two compression spring rods facing away from each other, and the first elastic element is configured to abut against the middle bar of the slide rail.

8. The slide rail buffer according to claim 7, characterized in that, The compression spring rod includes a rod body and a spring sleeved on the outside of the rod body. The rod body is connected to the sliding plate, and the length of the spring in its natural state is greater than the length of the rod body.

9. The slide rail buffer according to claim 4, characterized in that, The second slider has two bent elastic members on the side facing the first slider. The two elastic members are located on both sides of the compression spring and are configured to abut against the two limiting plates.

10. The slide rail buffer according to claim 1, characterized in that, The second sliding member slides in a sliding engagement with the inner side of the fixed member via strip rails on both sides along the sliding direction.

Images