A travel switching type furniture bumper

Abstract

A stroke switching type furniture rebounder, the stroke switching structure includes a movable pin assembly; the movable pin assembly is telescopically arranged in the adjusting hole of the telescopic seat; the lower side of the rear end of the telescopic top rod is provided with a rear stop block; when the movable pin assembly protrudes out of the adjusting hole and approaches the telescopic top rod, the top end of the movable pin assembly can abut against the rear stop block to limit the forward and backward stroke of the telescopic top rod in a short stroke state; when the movable pin assembly moves to a state of not abutting against the rear stop block, the forward and backward stroke of the telescopic top rod is in a long stroke state; the two sides of the telescopic seat and the two sides of the telescopic shell are provided with slide rails and slide blocks which are slidably connected. The rebounder solves the defects of the existing rebounder in installation, stroke switching and buffer compatibility, realizes multifunctional integration through structural innovation, simplifies the material preparation and installation process, and improves the practicability and economy of the furniture rebounder.

Description

Technical Field

[0001] This utility model relates to the field of furniture hardware accessories technology, and in particular to a travel-switching type furniture rebound device. Background Technology

[0002] A door rebound mechanism is a switch used on furniture such as cabinets and drawers. After installing the door rebound mechanism, the door can be opened and closed without a handle; simply pressing the door panel is sufficient. Due to limited space at the end of the top rod, existing rebound mechanisms are typically only a choice between a magnetic or a buffer component. Different types of hinge structures often require different rebound mechanisms, resulting in a large variety and quantity of materials, and it's difficult to simultaneously accommodate multiple functions such as top rod length adjustment, magnetic closure, and buffer cushioning. Therefore, a furniture rebound device with both a buffer and magnetic closure has been designed on the market. For example, a furniture rebound device disclosed in patent number CN202510270095.7. However, during actual use testing, the applicant discovered that this type of rebound device also has the following drawbacks: 1. This type of rebound device can switch between long and short strokes of the telescopic top rod in the outward rebound state by adjusting the depth of the hook screw, thereby meeting the arrangement requirements of telescopic top rods of large and small stroke rebounders; however, this arrangement method is not convenient for the fixed installation of the radial hook body. When the hook screw is not exposed enough, the hook body is easy to fall out, making the overall installation of the rebound device difficult.

[0003] 2. The telescopic base and telescopic shell are slidably limited on both sides by long side slide rails and side slide grooves. The side slide rails and side slide grooves are relatively long, making it difficult for the telescopic base and telescopic shell to be snapped together and fixed.

[0004] 3. Adjusting the hole position limit of the ejector pin through the telescopic connecting block of the telescopic seat, the ejector pin is prone to wobbling back and forth, which is not convenient for the assembly of the telescopic components.

[0005] 4. The adjusting nut is suspended at the end of the adjusting pin, making it easy for it to fall off the adjusting pin during the adjustment process.

[0006] 5. The base and outer shell are only fastened together by snap-fit ​​at the front and rear ends, which can easily cause lateral offset errors and affect the consistency of appearance. Utility Model Content

[0007] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a travel-switching type furniture rebound device.

[0008] The technical solution adopted by one embodiment of this utility model to solve its technical problem is: a stroke-switching furniture rebounder, including: a base, an outer shell, a telescopic component and a stroke-switching structure; The telescopic assembly includes a telescopic top rod, a telescopic outer shell, a telescopic base, a hook body, and a reset elastic element; the telescopic outer shell and the telescopic base are elongated, forming an elongated sliding receiving cavity; the telescopic top rod is slidably installed in the sliding receiving cavity, and its front end can extend and retract from the front end of the telescopic outer shell; the reset elastic element is installed in the sliding receiving cavity and can keep the telescopic top rod in an outwardly springy or inwardly pressed state; the outer shell is detachably installed on the base and presses the telescopic assembly onto the base; The telescopic assembly is provided with a hook guide groove; one end of the hook body can be movably inserted into the hook guide groove, and the other end can be rotatably mounted on the hook mounting post of the telescopic seat; the hook body is used to limit the telescopic stroke of the telescopic top rod. The stroke switching structure includes a movable pin assembly; the movable pin assembly is telescopically inserted through the adjustment hole of the telescopic seat; a rear stop is provided on the lower rear end of the telescopic top rod; when the upper part of the movable pin assembly extends out of the adjustment hole and approaches the telescopic top rod, the top end of the movable pin assembly can abut against the rear stop to limit the forward and backward stroke of the telescopic top rod to a short stroke state; when the movable pin assembly moves to a state where it does not abut against the rear stop, the forward and backward stroke of the telescopic top rod is in a long stroke state.

[0009] Optionally, the movable pin assembly includes a separate upper pin and a lower cover; the lower cover is located below the adjustment hole, and the upper pin is located above the adjustment hole, and the upper pin can pass through the adjustment hole from above and lock with the lower cover.

[0010] Optionally, the outer edge of the upper pin is provided with an outer edge protrusion; the upper outer edge of the adjustment hole is provided with an outer edge groove that matches the outer edge protrusion. The outer edge protrusion can be positioned above the outer edge of the adjustment hole so that the upper pin can abut against the rear stop block; by rotating the upper pin, the outer edge protrusion can be inserted into the outer edge groove, at which point the upper pin does not abut against the rear stop block.

[0011] Optionally, the movable pin assembly further includes a pin spring; the pin spring sleeve is located below the adjusting hole, with its upper end abutting against the lower side of the adjusting hole and its lower end abutting against the lower cover; the lower cover includes a cover post and a cover ring platform; the cover ring platform is located below the cover post; the cover post is provided with internal threads and is threadedly connected to the lower end of the upper pin; the pin spring is sleeved on the outer edge of the cover post, with its lower end abutting against the cover ring platform.

[0012] Optionally, the outer casing is provided with an adjusting nut, and the reset elastic element is a reset spring; the telescopic assembly includes an adjusting pin; the adjusting pin includes a pin portion and a threaded post portion; the threaded post portion is threadedly connected to the adjusting nut; the pin portion extends into the telescopic rod; the reset spring can be sleeved on the pin portion; The adjusting ejector pin is provided with an ejector pin limiting block; the rear end of the telescopic seat is provided with an ejector pin slot, the upper part of the ejector pin slot is open, and the ejector pin limiting block can be inserted into the ejector pin slot from above.

[0013] Optionally, the top of the ejector pin limiting block is provided with a connecting protrusion; the rear end of the telescopic housing is provided with a connecting groove; the connecting protrusion can be inserted into the connecting groove; the base is provided with a nut support; the adjusting nut is located above the nut support; the housing is sleeved with a nut clearance groove; the nut clearance groove is located above the nut support, and the outer periphery of the adjusting nut extends out of the nut clearance groove; an arc-shaped support surface is provided above the nut support.

[0014] Optionally, the telescopic base and the telescopic housing are provided with slidably connected side rails and side sliders; the side rails are divided into several segments along the front-back direction, and a rail clearance notch is provided between two adjacent side rail segments; the side sliders are provided in several segments along the front-back direction; the side sliders can slide into the side rails through the rail clearance notch.

[0015] Optionally, the rear end of the outer casing and the rear end of the base are provided with a first slot and a first locking part that can be snapped together; the lower front end of the base is provided with a second slot, and the lower front end of the outer casing is provided with a second locking part, the second locking part being able to snap into the second slot.

[0016] Optionally, the outer casing and the base are provided with matching side grooves and side protrusions on both sides; the side protrusions can be inserted vertically into the side grooves. The side grooves and side protrusions are provided in at least three sets at intervals, located at the front, middle and rear of the base and the outer casing, respectively.

[0017] Optionally, the lower front side of the outer casing is provided with an upward-facing inclined guide surface.

[0018] The beneficial effects of this utility model are as follows: This utility model not only solves the defects of existing rebounders in terms of installation, stroke switching, and buffer compatibility, but also achieves multi-functional integration through structural innovation, simplifies the material preparation and installation process, and improves the practicality and economy of furniture rebounders, as detailed below: 1. Stable and Reliable Stroke Switching Structure: The telescopic design of the movable pin assembly replaces the traditional hook screw, enabling flexible switching between long and short strokes of the telescopic rod. The movable pin assembly interacts directly with the rear stop of the telescopic rod, resulting in a simple structure, convenient adjustment, and avoiding the problem of the hook body easily detaching, thus improving installation stability and operational reliability.

[0019] 2. The movable pin assembly has good positioning and reduces shaking: The movable pin assembly passes through the adjustment hole of the telescopic seat and cooperates with the rear stop of the telescopic top rod. The structure is compact and the positioning is accurate, which effectively prevents the movable pin assembly from shaking back and forth during the movement, ensuring the stability and consistency of the stroke switching, while facilitating the overall assembly of the telescopic assembly.

[0020] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0021] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of the structure of the furniture rebound device of this utility model; Figure 2 for Figure 1 Exploded view of the rebound device in the furniture; Figure 3 for Figure 1 Another exploded view of the furniture rebound device; Figure 4 for Figure 1 Cross-sectional view of the furniture rebound device.

[0022] Explanation of key component symbols: 10. Base; 11. Nut support; 12. First slot; 13. Second slot; 14. Side protrusion; 20. Outer shell; 21. Nut clearance groove; 22. First locking part; 23. Second locking part; 24. Side groove; 25. Inclined guide surface; 30. Telescopic assembly; 31. Telescopic top rod; 311. Rear stop; 32. Telescopic outer shell; 321. Side slider; 322. Connecting slot; 323. Rear limit slider; 33. Telescopic seat; 331. Adjustment hole; 332. Outer edge groove; 333. Rib; 334. Annular cylinder wall; 335. Stroke limit groove; 336. Side slide rail; 337. Slide rail clearance notch; 38. Ejector pin slot; 339. Hook mounting post; 34. Hook body; 35. Reset elastic element; 36. Adjusting ejector pin; 361. Ejector pin part; 362. Threaded post part; 363. Ejector pin limiting block; 364. Connecting protrusion; 37. Hook guide groove; 38. Rear limiting slide groove; 40. Movable pin assembly; 41. Upper pin; 411. Outer edge protrusion; 412. Notch; 413. Force application groove; 42. Lower cover; 421. Cover post; 422. Cover ring platform; 43. Pin spring; 50. Adjusting nut. Detailed Implementation

[0023] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0024] In the description of this utility model, "multiple" means two or more; "greater than," "less than," and "exceeding" are understood to exclude the stated number; "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly specifying the number of indicated technical features or their sequential relationship.

[0025] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0026] In this utility model, unless otherwise explicitly defined, the terms "setting," "installing," and "connecting" should be interpreted broadly. For example, they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to a fixed connection, a detachable connection, or an integral molding; they can refer to a mechanical connection; they can refer to the internal connection of two components or the interaction between two components. Those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0027] Example Reference Figures 1 to 4 The present invention proposes a stroke-switching furniture rebounder, comprising: a base 10, an outer shell 20, a telescopic component 30, and a stroke-switching structure; The telescopic assembly 30 includes a telescopic top rod 31, a telescopic outer shell 32, a telescopic base 33, a hook body 34, and a reset elastic element 35. The telescopic outer shell 32 and the telescopic base 33 are elongated and together form an elongated sliding receiving cavity. The telescopic top rod 31 is slidably installed in the sliding receiving cavity, and its front end can extend and retract at the front end of the telescopic outer shell 32. The reset elastic element 35 is installed in the sliding receiving cavity and can keep the telescopic top rod 31 in an outwardly spring-loaded or inwardly pressed state. The outer shell 20 is detachably installed on the base 10 and presses the telescopic assembly 30 onto the base 10. The telescopic assembly 30 is provided with a hook guide groove 37; one end of the hook body 34 can be movably inserted into the hook guide groove 37, and the other end can be rotatably mounted on the hook mounting post 339 of the telescopic seat 33; the hook body 34 is used to limit the telescopic stroke of the telescopic top rod 31. The stroke switching structure includes a movable pin assembly 40; the movable pin assembly 40 is telescopically inserted through an adjustment hole 331 in the telescopic seat 33; a rear stop 311 is provided on the lower rear end of the telescopic top rod 31; when the upper part of the movable pin assembly 40 extends out of the adjustment hole 331 and approaches the telescopic top rod 31, the top of the movable pin assembly 40 can abut against the rear stop 311 to limit the forward and backward stroke of the telescopic top rod 31 to a short stroke state; when the movable pin assembly 40 moves to a state where it does not abut against the rear stop 311, the forward and backward stroke of the telescopic top rod 31 is in a long stroke state.

[0028] This invention not only solves the defects of existing rebounders in terms of installation, stroke switching, and buffer compatibility, but also achieves multi-functional integration through structural innovation, simplifying material preparation and installation processes, and improving the practicality and economy of furniture rebounders, as detailed below: 1. Stable and reliable stroke switching structure: The telescopic design of the movable pin assembly 40 replaces the traditional hook screw, enabling flexible switching between long and short strokes of the telescopic top rod 31. The movable pin assembly 40 interacts directly with the rear stop 311 of the telescopic top rod 31, resulting in a simple structure, convenient adjustment, and avoiding the problem of the hook body 34 easily detaching, thus improving installation stability and operational reliability.

[0029] 2. The movable pin assembly 40 is well-positioned and reduces shaking: The movable pin assembly 40 passes through the adjustment hole 331 of the telescopic seat 33 and cooperates with the rear stop block 311 of the telescopic top rod 31. The structure is compact and the positioning is accurate, which effectively prevents the movable pin assembly 40 from shaking back and forth during the movement process, ensuring the stability and consistency of the stroke switching, while facilitating the overall assembly of the telescopic assembly 30.

[0030] In this embodiment, the movable pin assembly 40 includes a separate upper pin 41 and a lower retaining cover 42. The lower retaining cover 42 is located below the adjustment hole 331, and the upper pin 41 is located above the adjustment hole 331. The upper pin 41 can pass through the adjustment hole 331 from above and lock with the lower retaining cover 42. The separate upper pin 41 and lower retaining cover 42 structure enables modular assembly of the movable pin assembly 40. The upper pin 41 is responsible for the stroke switching function (directly contacting the rear stop 311), and the lower retaining cover 42 provides bottom support and a fixing point. The two can be manufactured separately and then assembled. This design significantly simplifies the manufacturing process: the upper pin 41 can be made of a high-hardness material to ensure wear resistance, while the lower retaining cover 42 can be made of an easily formable material to reduce costs; at the same time, the separate structure reduces the difficulty of precision machining, and the damping of the movable pin assembly 40 can be controlled by adjusting the locking force during assembly, improving the operating feel and lifespan.

[0031] In this embodiment, the outer edge of the upper pin 41 is provided with an outer edge protrusion 411; the upper outer edge of the adjustment hole 331 is provided with an outer edge groove 332 that matches the outer edge protrusion 411; the outer edge protrusion 411 can be placed above the outer edge of the adjustment hole 331 so that the upper pin 41 can abut against the rear stop 311; when the upper pin 41 is rotated, the outer edge protrusion 411 can be inserted into the outer edge groove 332, at which time the upper pin 41 does not abut against the rear stop 311. The outer edge protrusion 411 of the upper pin 41 and the outer edge groove 332 of the adjustment hole 331 of the telescopic seat 33 form a "boss-groove" fit. When the outer edge protrusion 411 is attached to the upper surface of the adjustment hole 331, the upper pin 41 remains in an upward state to block the rear stop 311 (short stroke mode); when the upper pin 41 is rotated so that the protrusion is inserted into the groove, the upper pin 41 moves down and disengages from the rear stop 311 (long stroke mode). This structure enables stepless operation of "rotation and one-button switching" without the need to disassemble parts or auxiliary tools. The switching process is intuitive and reliable, and the engagement of the protrusion and the groove after embedding can prevent accidental reset.

[0032] In this embodiment, at least two outer edge protrusions 411 are evenly arranged circumferentially; at least two outer edge grooves 332 are correspondingly provided with the outer edge protrusions 411. This ensures that the upper pin 41 is subjected to uniform force during rotational switching, avoiding wear or jamming caused by stress concentration at a single point. The multi-protrusion design also enhances the stability of the switching state: in short-stroke mode, multiple protrusions jointly bear the impact force of the rear stop 311; in long-stroke mode, multiple protrusions synchronously embed into the grooves to ensure that the upper pin 41 is firmly locked, preventing vibration from loosening it.

[0033] Furthermore, the outer edge of the adjustment hole 331 and the lower side of the outer edge protrusion 411 are provided with matching ribs 333 and notches 412; the ribs 333 and notches 412 are matched to limit the rotational movement of the upper pin 41. By adding complementary ribs 333 and notches 412 to the outer edge of the adjustment hole 331 and the bottom of the protrusion, a "foolproof limiting structure" is formed. When the rib 333 is engaged in the notch 412, the upper pin 41 is limited to rotating only within a specific angle (such as 90°), ensuring that the outer edge protrusion 411 is precisely aligned with the groove entrance. This design completely eliminates the misalignment problem caused by excessive rotation, and users can quickly locate the switching endpoint by touch, improving operational reliability, especially suitable for blind operation in concealed environments.

[0034] In this embodiment, the movable pin assembly 40 also includes a pin spring 43; the pin spring 43 is located below the adjustment hole 331, with its upper end abutting against the lower side of the adjustment hole 331 and its lower end abutting against the lower cover 42; the introduction of the pin spring 43 forms a self-resetting system: the upper end of the spring pushes against the lower edge of the adjustment hole 331, and the lower end presses against the lower cover 42, always applying a downward elastic force to the upper pin 41 and the lower cover 42.

[0035] Specifically, the lower cover 42 includes a cover post 421 and a cover ring platform 422; the cover ring platform 422 is located below the cover post 421; the cover post 421 has internal threads and is threadedly connected to the lower end of the upper pin 41; the pin spring 43 is sleeved on the outer edge of the cover post 421, with its lower end abutting against the cover ring platform 422. The stepped structure of the lower cover 42 (cover post 421 + cover ring platform 422) and the pin spring 43 form a highly efficient force transmission chain: the spring is sleeved on the outer wall of the cover post 421, and its lower end abuts against the ring platform to increase the bearing area and avoid stress concentration. The internal thread of the cover post 421 is directly connected to the upper pin 41, ensuring axial coaxiality between the two and eliminating eccentric wear. The ring platform also serves as a spring positioning reference, preventing lateral bending failure of the spring and improving the durability of the elastic system.

[0036] In this embodiment, the lower end of the upper pin 41 is provided with a force-applying groove 413, into which an unlocking tool can be inserted to rotate the upper pin 41. The force-applying groove 413 (such as a Phillips head or hexagonal socket) at the bottom of the upper pin 41 allows for rotation using a specialized tool (screwdriver / wrench). This design solves the problem of inconvenient finger operation in confined spaces: installers can apply force precisely inside the cabinet using tools, avoiding slippage leading to switching failures or component damage, making it particularly suitable for high-end cabinet installations with concealed installation.

[0037] In this embodiment, an annular cylindrical wall 334 extends downward below the adjusting hole 331; the annular cylindrical wall 334 provides space for arranging the lower cover 42. The annular cylindrical wall 334 extending downward below the telescopic seat 33 encloses the lower cover 42 and the pin spring 43, forming a sealed protective cavity. The cylindrical wall isolates dust and oil from entering the interior of the movable pin assembly 40, preventing impurities from jamming the spring or threads; at the same time, it restrains the radial sway of the lower cover 42, ensuring that the upper pin 41 always moves vertically, avoiding uneven wear of the stop or switching failure due to tilting.

[0038] Furthermore, a travel limiting groove 335 extending forward and backward is provided above the telescopic seat 33, and the adjustment hole 331 is located within the travel limiting groove 335; the rear stop 311 can move forward and backward within the travel limiting groove 335. The side wall of the limiting groove precisely guides the movement trajectory of the rear stop 311, eliminating lateral offset when the push rod moves; at the same time, the groove depth controls the amount of sinking of the rear stop 311, preventing it from excessively pressing down and interfering with the operation of the movable pin assembly 40, thus improving the positioning accuracy in the short stroke mode.

[0039] In this embodiment, the outer casing 20 is provided with an adjusting nut 50, and the reset elastic element 35 is a reset spring; the telescopic assembly 30 includes an adjusting pin 36; the adjusting pin 36 includes a pin part 361 and a threaded post part 362; the threaded post part 362 is threadedly connected to the adjusting nut 50; the pin part 361 extends into the telescopic rod 31; the reset spring can be sleeved on the pin part 361; the adjusting pin 36 is provided with a pin limiting block 363; the rear end of the telescopic seat 33 is provided with a pin slot 338, the upper opening of the pin slot 338 is provided, and the pin limiting block 363 can be engaged into the pin slot 338 from above.

[0040] By adjusting the threaded engagement between the ejector pin 36 (ejector part 361 + threaded post part 362) and the adjusting nut 50, the travel of the telescopic ejector rod 31 can be finely adjusted. Simultaneously, a return spring is fitted onto the ejector pin part 361, simplifying the internal structural layout. The ejector pin limiting block 363 engages with the ejector pin slot 338 (open at the top) at the rear end of the telescopic seat 33 to achieve radial limiting of the adjustable ejector pin 36, preventing back-and-forth wobbling. The ejector pin limiting block 363 can be directly engaged into the ejector pin slot 338 from above, without the need for additional fasteners.

[0041] Specifically, the top of the ejector pin limiting block 363 is provided with a connecting protrusion 364; the rear end of the telescopic housing 32 is provided with a connecting groove 322; the connecting protrusion 364 can be engaged with the connecting groove 322. The connecting protrusion 364 of the ejector pin limiting block 363 engages with the connecting groove 322 at the rear end of the telescopic housing 32, so that the telescopic seat 33 and the telescopic housing 32 move synchronously and avoid jamming caused by misalignment.

[0042] Furthermore, a rear limiting slider 323 is provided at the lower rear end of the telescopic housing 32; a rear limiting groove 38 is provided at the rear end of the telescopic base 33, and the rear limiting groove 38 is located below the ejector pin slot 338; the rear limiting groove 38 has a transverse "L" shape structure, and an avoidance notch is provided between it and the side slide rail 336; the rear limiting slider 323 can be inserted into the inner side of the rear limiting groove 38 through the avoidance notch to fix the rear end of the telescopic housing 32, avoid the expansion and deformation of the telescopic housing 32, thereby ensuring the shape of the telescopic housing 32, and effectively preventing the connecting protrusion 364 on the top of the ejector pin limiting protrusion 363 from separating from the connecting groove 322 provided at the rear end of the telescopic housing 32 during disassembly and assembly.

[0043] In this embodiment, the base 10 is provided with a nut support 11; the adjusting nut 50 is located above the nut support 11; the nut support 11 on the base 10 supports the adjusting nut 50 to prevent the nut from falling off due to being suspended and subjected to force, and the support provides bottom support to ensure that the nut does not shift when the thread is adjusted.

[0044] Specifically, the outer casing 20 has a nut clearance groove 21; the nut clearance groove 21 is located above the nut support 11, and the outer periphery of the adjusting nut 50 extends out of the nut clearance groove 21; the nut clearance groove 21 allows the outer periphery of the adjusting nut 50 to be exposed, which is convenient for direct rotation and adjustment with tools without disassembling the outer casing 20.

[0045] Furthermore, an arc-shaped support surface is provided above the nut support 11. The arc-shaped support surface is enlarged to match the outer contour of the adjusting nut 50, preventing the adjusting nut 50 from falling off.

[0046] In this embodiment, the telescopic base 33 and the telescopic housing 32 are provided with slidably connected side rails 336 and side sliders 321 on both sides. The side rails 336 are divided into several segments along the front-back direction, and a rail clearance notch 337 is provided between adjacent two segments of the side rails 336. The side sliders 321 are provided at intervals along the front-back direction. The side sliders 321 can slide into the side rails 336 through the rail clearance notch 337. The segmented design of the side rails 336 and side sliders 321 facilitates assembly: the telescopic base 33 and the telescopic housing 32 adopt segmented side rails 336 and side sliders 321. The side rails 336 are arranged at intervals along the front-back direction, and the side sliders 321 are allowed to slide into the notch through the rail clearance notch 337, which greatly simplifies the engagement and assembly process between the telescopic components 30, solves the problem of difficult installation of long side rails 336 and side sliding grooves, and improves production efficiency and assembly accuracy.

[0047] In this embodiment, the rear end of the outer casing 20 and the rear end of the base 10 are provided with a first slot 12 and a first locking part 22 for engaging; the lower front side of the base 10 is provided with a second slot 13, and the lower front side of the outer casing 20 is provided with a second locking part 23, which can be engaged with the second slot 13. The outer casing 20 and the base 10 are engaged bidirectionally through the front and rear slots / locking parts (first slot 12 + first locking part 22, second slot 13 + second locking part 23).

[0048] In this embodiment, the outer casing 20 and the base 10 are provided with matching side grooves 24 and side protrusions 14 on both sides; the side protrusions 14 can be inserted into the side grooves 24 vertically; the vertical engagement design of the side grooves 24 and the side protrusions 14 provides additional lateral restraint, prevents the outer casing 20 and the base 10 from moving horizontally, eliminates gaps or misalignments after component assembly, and ensures a neat product appearance.

[0049] In this embodiment, at least three sets of side grooves 24 and side protrusions 14 are spaced apart and located at the front, middle, and rear of the base 10 and the outer casing 20, respectively. The at least three sets of mutually cooperating side grooves 24 and side protrusions 14 form a multi-point lateral restraint, which solves the problem of possible lateral offset or misalignment between the outer casing 20 and the base 10, and also avoids the shape defects of deformation expansion or deformation indentation in the middle of the long-span outer casing 20.

[0050] Specifically, the side groove 24 has a countersunk hole structure with only a groove at the bottom or a grooved structure with open sides and bottom. When the side groove 24 has a grooved structure, the side protrusion 14 slides into the side groove 24, which can restrict the position of the outer shell in the front-back direction. When the side groove 24 has a countersunk hole structure with only a groove at the bottom, the side protrusion 14 can be directly inserted into the side groove 24, which can restrict the position of the outer shell 20 in the front-back direction while restricting the expansion or indentation of the shell wall of the outer shell 20.

[0051] Preferably, at least one set of the side grooves 24 has a countersunk hole structure with only a groove at the bottom; it can limit the expansion or inward deformation of the shell wall of the outer casing 20 and ensure the stability of the shell structure of the outer casing 20.

[0052] In this embodiment, an upward-facing inclined guide surface 25 is provided on the lower front side of the outer casing 20. When the outer casing 20 is fastened to the base 10, the second slot 13 at the front end needs to be fastened to the second slot 23 of the base 10 first. Then, the rear part of the outer casing 20 will be lifted, and then the rear end of the outer casing 20 will be pressed down and the first slot 22 at the rear end will be pressed into the first slot 12 at the rear of the base 10. With the inclined guide surface 25, the bottom of the outer casing 20 can be protected from wear, while maintaining the inclined guiding state of the outer casing 20, allowing the outer casing 20 to be fastened to the front end of the base 10, thus facilitating the convenient and quick installation and fixation of the outer casing 20 and the base 10.

[0053] Of course, this utility model is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of this utility model. All such equivalent modifications and substitutions are included within the scope defined by the claims of this application.

Claims

1. A trip-switching furniture bumper, characterized by, include: Base (10), outer casing (20), telescopic assembly (30) and stroke switching structure; The telescopic assembly (30) includes a telescopic top rod (31), a telescopic outer shell (32), a telescopic seat (33), a hook body (34), and a reset elastic element (35); the telescopic outer shell (32) and the telescopic seat (33) are elongated and together form an elongated sliding receiving cavity; the telescopic top rod (31) is slidably installed in the sliding receiving cavity, and its front end can extend and retract at the front end of the telescopic outer shell (32); The reset elastic element (35) is installed in the sliding receiving cavity, and can keep the telescopic top rod (31) in an externally spring-out or internally pressed state; the outer shell sleeve (20) is detachably installed on the base (10), and presses the telescopic assembly (30) onto the base (10); The telescopic assembly (30) is provided with a hook guide groove (37); one end of the hook body (34) can be movably inserted into the hook guide groove (37), and the other end is rotatably mounted on the hook mounting post (339) of the telescopic seat (33); the hook body (34) is used to limit the telescopic stroke of the telescopic top rod (31). The stroke switching structure includes a movable pin assembly (40); the movable pin assembly (40) is telescopically inserted through the adjustment hole (331) of the telescopic seat (33); a rear stop (311) is provided on the lower rear end of the telescopic top rod (31); when the upper part of the movable pin assembly (40) extends out of the adjustment hole (331) and approaches the telescopic top rod (31), the top end of the movable pin assembly (40) can abut against the rear stop (311) to limit the forward and backward stroke of the telescopic top rod (31) to a short stroke state; when the movable pin assembly (40) moves to a state where it does not abut against the rear stop (311), the forward and backward stroke of the telescopic top rod (31) is in a long stroke state.

2. The travel switching furniture bumper according to claim 1, characterized in that: The movable pin assembly (40) includes a separate upper pin (41) and a lower cover (42); the lower cover (42) is located below the adjustment hole (331), and the upper pin (41) is located above the adjustment hole (331). The upper pin (41) can pass through the adjustment hole (331) from above and lock with the lower cover (42).

3. The travel switching furniture bumper according to claim 2, characterized in that: The outer edge of the upper pin (41) is provided with an outer edge protrusion (411); the upper outer edge of the adjustment hole (331) is provided with an outer edge groove (332) that matches the outer edge protrusion (411); The outer edge protrusion (411) can be placed above the outer edge of the adjustment hole (331) so that the upper pin (41) can abut against the rear stop (311); when the upper pin (41) is rotated, the outer edge protrusion (411) can be inserted into the outer edge groove (332), at which time the upper pin (41) does not abut against the rear stop (311).

4. The travel switching furniture bumper according to claim 2, characterized in that: The movable pin assembly (40) also includes a pin spring (43); the pin spring (43) is sleeved below the adjusting hole (331), with its upper end abutting against the lower side of the adjusting hole (331) and its lower end abutting against the lower cover (42); the lower cover (42) includes a cover post (421) and a cover ring platform (422); the cover ring platform (422) is located below the cover post (421); the cover post (421) is provided with an internal thread and is threadedly connected to the lower end of the upper pin (41); the pin spring (43) is sleeved on the outer edge of the cover post (421) and its lower end abutting against the cover ring platform (422).

5. The travel switching furniture bumper according to claim 1, characterized in that: The outer casing (20) is provided with an adjusting nut (50), and the reset elastic element (35) is a reset spring; the telescopic assembly (30) includes an adjusting pin (36); the adjusting pin (36) includes a pin portion (361) and a threaded post portion (362); the threaded post portion (362) is threadedly connected to the adjusting nut (50); the pin portion (361) extends into the telescopic rod (31); the reset spring can be sleeved on the pin portion (361); The adjusting pin (36) is provided with a pin limiting block (363); the rear end of the telescopic seat (33) is provided with a pin slot (338), the upper opening of the pin slot (338) is provided, and the pin limiting block (363) can be inserted into the pin slot (338) from above.

6. The travel switching furniture bumper according to claim 5, characterized in that: The top of the pin limiting block (363) is provided with a connecting protrusion (364); the rear end of the telescopic shell (32) is provided with a connecting slot (322); the connecting protrusion (364) can be inserted into the connecting slot (322); The base (10) is provided with a nut support (11); the adjusting nut (50) is located above the nut support (11); the outer casing (20) is provided with a nut clearance groove (21); the nut clearance groove (21) is located above the nut support (11), and the outer periphery of the adjusting nut (50) extends out of the nut clearance groove (21); an arc-shaped support surface is provided above the nut support (11).

7. The travel-switching furniture rebounder according to claim 1, characterized in that: The telescopic base (33) and the telescopic outer shell (32) are provided with slidably connected side slide rails (336) and side sliders (321); the side slide rails (336) are divided into several segments along the front-back direction, and a slide rail clearance notch (337) is provided between two adjacent side slide rail segments (336); the side sliders (321) are provided in several segments along the front-back direction; the side sliders (321) can slide into the side slide rails (336) through the slide rail clearance notch (337).

8. The travel switching furniture bumper according to claim 1, characterized in that: The rear end of the outer shell (20) and the rear end of the base (10) are provided with a first slot (12) and a first locking part (22) that can be snapped together; the lower front end of the base (10) is provided with a second slot (13) and the lower front end of the outer shell (20) is provided with a second locking part (23), and the second locking part (23) can be snapped into the second slot (13).

9. The travel switching furniture bumper according to claim 8, characterized in that: The outer casing (20) and the base (10) are provided with matching side grooves (24) and side protrusions (14); the side protrusions (14) can be inserted vertically into the side grooves (24); The side grooves (24) and side protrusions (14) are provided in at least three sets at intervals, located at the front, middle and rear of the base (10) and the outer shell (20) respectively.

10. The travel switching furniture bumper according to claim 8, characterized in that: The lower front side of the outer casing (20) is provided with an upward inclined guide surface (25).

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