Detachable buffering sofa leg assembly
By using a split connecting column and base design and a double buffer structure, the problems of traditional sofa legs being difficult to disassemble and having insufficient shock absorption strength are solved, enabling quick disassembly of sofa legs and efficient cushioning, thereby improving the user experience and extending the lifespan of the sofa.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-26
- Publication Date
- 2026-04-07
AI Technical Summary
Traditional sofa legs are molded as a single piece with the sofa, making them difficult to disassemble. They also have weak shock absorption, which affects user experience and lifespan.
It adopts a split connecting column and base design, combined with a double buffer structure and adjustment structure. The threaded connection enables disassembly, and the buffer springs made of manganese steel and high carbon steel provide multi-layer buffering. The guide structure ensures stability and flexibility.
It enables quick disassembly and replacement of sofa legs, improves cushioning and shock absorption performance, reduces maintenance costs, enhances comfort and quietness, and extends the lifespan of the sofa.
Smart Images
Figure CN224084964U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to sofa accessory technical field, concretely is a detachable buffer sofa foot subassembly. BACKGROUND
[0002] In the modern furniture field, the sofa as important household goods, its comfort and durability are concerned, the sofa foot as the key part of supporting the sofa, not only need to have good supporting performance, still need to satisfy the user demand in the buffer shock attenuation and detachability. The traditional sofa foot and sofa body usually adopt the integrated mode connection, this kind of connecting mode although guarantees the stability of structure to some extent, but there is obvious defect: when the sofa foot appears damage or needs to be replaced, it is difficult to individually detach and replace the sofa foot, often need to handle the whole sofa, not only waste resources, still increase the use cost of user, simultaneously, the traditional sofa foot's buffer structure is relatively simple, generally only relies on single buffer component to realize the buffer function, when the sofa is subjected to axial force, such as the impact force produced when people sit down or get up, etc. Condition, the traditional buffer structure is difficult to effectively buffer high action, and the buffer strength is weak, leading to the sofa to easily produce larger vibration and noise, influence the use experience of user, long -term use can also cause damage to the overall structure of sofa, reduce the service life of sofa. SUMMARY
[0003] In view of the prior art deficiency, the utility model provides a detachable buffer sofa foot subassembly, to solve the problem that the traditional sofa foot and sofa integrated molding are difficult to detach and the buffer strength is weak.
[0004] To achieve the above purpose, the utility model provides a detachable buffer sofa foot subassembly, including connecting column and base, the connecting column is penetrated along its length direction and is connected with the connecting hole, the connecting hole is screw -threaded with the connecting bolt for the threaded cooperation with the pre -buried hole of the sofa corner outside, the base is provided with the buffer hole that the connecting column end partial place is inserted, the buffer hole is provided with the first buffer piece for buffering part high action when the connecting column is subjected to axial force loading, the connecting column and base are provided with the second buffer piece for buffering part high action when the connecting column is subjected to axial force loading, the connecting column is provided with the adjusting structure for the linkage cooperation with the second buffer piece to adjust the buffer force degree of second buffer piece, the buffer hole is provided with the guide structure for guiding and positioning the activity direction of connecting column.
[0005] The advantages of adopting the above technical solution are as follows: The separate structure of the connecting column and the base, combined with the threaded connection of the connecting bolts, creates a detachable mechanical connection between the sofa legs and the sofa body. When the sofa legs wear out or age due to long-term use, or when the user needs to replace the sofa legs according to the decoration style, disassembly or installation can be quickly completed by simply tightening the connecting bolts, significantly reducing furniture maintenance costs and improving the maintainability and lifespan of the sofa. Secondly, the double buffer structure significantly improves the cushioning and shock absorption performance of the sofa legs. The first buffer element is set in the buffer hole of the base, directly bearing the axial force transmitted by the connecting column, absorbing part of the impact force through elastic deformation; the second buffer element… This secondary buffer is positioned between the connecting column and the base, effectively dispersing the high-frequency, high-amplitude impact forces experienced by the sofa during use (such as the instantaneous load when a person sits down, the collision force when moving the sofa, etc.), preventing the impact force from being directly transmitted to the main structure of the sofa, thereby reducing the vibration and noise of the sofa frame and improving the comfort and quietness of the user. The design of the adjustable structure further enhances the applicability and flexibility of the components. Users can adjust the structure to change the cushioning force of the second buffer to adapt to the load requirements of different usage scenarios (such as the difference in load between daily home use and high-frequency use in commercial places), achieving personalized adjustment of the cushioning performance.
[0006] The present invention further comprises: the first buffer component includes a first buffer spring disposed in a buffer hole, the beginning end of the first buffer spring abutting against the bottom of the connecting column, the end end of the first buffer spring being connected to the bottom wall of the buffer hole, and the first buffer spring being made of manganese steel.
[0007] The advantages of adopting the above technical solution are: the specific structure of the first buffer component is defined, and a manganese steel first buffer spring is used as the core buffer element. Its technical advantages lie in the dual optimization of material properties and structural design. Manganese steel, as a high-strength alloy material, has excellent tensile strength and fatigue resistance, and can maintain stable elastic deformation under long-term, high-frequency loads. The spring structure design allows it to absorb and store energy through compression or stretching deformation when the connecting column is subjected to axial force, and then slowly release it, thereby effectively buffering the impact of instantaneous impact on the sofa body. The spring's initial end abuts against the bottom of the connecting column, and its end connects to the bottom wall of the buffer hole, directly constraining the axial movement of the connecting column. When the sofa is subjected to a downward load (such as human weight), the connecting column moves into the buffer hole and compresses the spring. The spring's reaction force balances the load, slowing down the downward speed of the connecting column. When the load is removed, the spring's elastic restoring force pushes the connecting column back to its original position, achieving dynamic balance in the buffering process. This not only effectively absorbs vertical impact forces but also provides stable buffering force through the spring's linear elastic characteristics, preventing sofa wobbling or noise problems caused by sudden changes in buffering force.
[0008] The present invention further includes: the second buffer component includes a second buffer spring sleeved on the connecting column, the end of the second buffer spring being connected to the top wall of the base, the beginning of the second buffer spring being provided with a connecting ring, the connecting ring being coaxial with the connecting column and detachably connected, and the second buffer spring being made of high carbon steel.
[0009] The advantages of adopting the above technical solution are as follows: The design of using a second buffer spring made of high-carbon steel with a detachable connecting ring achieves an organic combination of buffering performance and structural flexibility. High-carbon steel has high hardness and elastic limit, and the spring made of it can maintain stable elastic deformation when subjected to large loads, and has excellent fatigue resistance. It is suitable for sofa leg buffering scenarios that need to frequently bear alternating loads. The second buffer spring is sleeved on the connecting column, with its end connected to the top wall of the base and its beginning detachably connected to the connecting column through the connecting ring. This setting allows the spring to generate radial constraint when the connecting column moves axially, forming a three-dimensional buffering system that cooperates with the first buffer component. That is, the axial arrangement of the second buffer spring and the first buffer spring form a double buffer barrier, providing buffering resistance for the downward and upward movement trends of the connecting column, respectively. It can more comprehensively absorb impact forces from different directions (such as the downward impact force when sitting down and the upward rebound force when standing up). The detachable connection between the connecting ring and the connecting column means that when the second buffer spring is fatigued due to long-term use, it is not necessary to disassemble the entire sofa leg assembly. Only the connecting ring and the spring need to be replaced, which greatly reduces maintenance difficulty and cost.
[0010] The present invention further includes the following: the adjustment structure includes a first threaded groove formed on the outer peripheral wall of the connecting column along the length direction of the connecting column and a second threaded groove formed on the inner peripheral wall of the shaft hole of the connecting ring. The first threaded groove and the second threaded groove are threadedly connected to realize the connection and cooperation between the connecting ring and the connecting column.
[0011] The advantages of adopting the above technical solution are as follows: The use of a threaded groove connection to achieve a detachable connection between the connecting ring and the connecting post offers a core advantage: a simple and reliable mechanical structure that enables stepless adjustment of the cushioning force, meeting the personalized needs of different users for sofa cushioning performance. Specifically, for scenarios with different load-bearing requirements (such as lightweight sofas for children and heavy-duty sofas for adults), the position of the connecting ring can be adjusted to adapt to different load ranges, ensuring the cushioning component performs optimally under various working conditions. Secondly, when the cushioning springs experience slight fatigue and loosening due to prolonged use, tightening the connecting ring increases the spring preload, restoring the original cushioning effect and preventing the replacement of the entire component due to spring performance degradation, thus extending the lifespan of the sofa legs. Furthermore, the threaded connection structure has excellent self-locking properties; once adjusted to the appropriate position, the connecting ring will not loosen due to vibration or long-term load, ensuring the stability of the cushioning force.
[0012] The present invention further comprises: a plurality of guide blocks evenly distributed around the outer peripheral wall of the end of the connecting column; the radial cross-section of the guide blocks is trapezoidal; the guiding structure includes a plurality of guide grooves circumferentially opened on the inner peripheral wall of the buffer hole; the plurality of guide grooves correspond one-to-one with the plurality of guide blocks and each guide block is inserted into the corresponding guide groove; the shape of the guide groove is adapted to the shape of the guide block; and the guide block is slidably disposed in the guide groove.
[0013] The advantages of adopting the above technical solution are: the guiding structure in the above technology achieves precise guidance and positioning of the connecting column's movement direction through the cooperation of the guiding block and the guiding groove. The guiding block is evenly distributed around the outer peripheral wall of the end of the connecting column, and its radial cross section is trapezoidal. It is inserted one-to-one with the trapezoidal guiding groove on the inner peripheral wall of the buffer hole. This design utilizes the inclined surface constraint characteristics of the trapezoidal structure to ensure that the connecting column can only slide in a straight line along the direction of the guiding groove when it moves axially. This effectively prevents the connecting column from tilting or rotating circumferentially due to uneven load, thereby avoiding problems such as twisting, jamming or even breakage of the buffer components (such as the first and second buffer springs) due to uneven force.
[0014] The present invention further comprises: the base is made of hard rubber material, and a protective sleeve for protecting the connecting column is provided on the connecting column. The protective sleeve is made of plastic material and the inner peripheral wall of the shaft hole of the protective sleeve is fitted with the outer peripheral wall of the connecting column with a clearance. The protective sleeve is movably sleeved on the connecting column along the length direction of the connecting column.
[0015] The advantages of adopting the above technical solution are: the base is made of hard rubber, which has excellent anti-slip performance and cushioning characteristics, providing stable support when in contact with the ground and reducing the sliding and displacement of the sofa during use. At the same time, the elastic deformation of the rubber material can absorb the vibration caused by uneven ground. Combined with the internal double cushioning structure, a three-level cushioning system is formed, further improving the overall shock absorption effect. The plastic protective sleeve on the connecting column is fitted in a gap fit, and its main function is to protect the connecting column from external environmental erosion and mechanical damage. Attached Figure Description
[0016] Figure 1 This is a three-dimensional view of the present invention;
[0017] Figure 2 This is a cross-sectional view of the present invention. Detailed Implementation
[0018] This utility model provides a detachable cushioned sofa leg assembly, including a connecting column 1 and a base 2. The connecting column 1 has a connecting hole 11 extending along its length. A connecting bolt 12, threaded into the connecting hole 11 for threaded engagement with pre-embedded holes at the corners of an external sofa, is threaded into the connecting hole 11. The base 2 has a cushioning hole 21 for partial insertion of the end of the connecting column 1. A first cushioning element is provided in the cushioning hole 21 to buffer a portion of the high force when the connecting column 1 is subjected to axial force. A second cushioning element is provided between the connecting column 1 and the base 2 to buffer a portion of the high force when the connecting column 1 is subjected to axial force. The column 1 is provided with an adjustment structure for cooperating with the second buffer to adjust the buffering force of the second buffer. The buffer hole 21 is provided with a guide structure for guiding and positioning the movement direction of the connecting column 1. The first buffer includes a first buffer spring 22 disposed in the buffer hole 21. The starting end of the first buffer spring 22 abuts against the bottom of the connecting column 1, and the end of the first buffer spring 22 is connected to the bottom wall of the buffer hole 21. The first buffer spring 22 is made of manganese steel. The second buffer includes a second buffer spring 13 sleeved on the connecting column 1. The end of the second buffer spring 13 is connected to the top wall of the base 2. The second buffer spring 13 is provided with a connecting ring 3 at its starting end. The connecting ring 3 is coaxial with the connecting post 1 and detachably connected. The second buffer spring 13 is made of high carbon steel. The adjustment structure includes a first threaded groove 14 formed on the outer peripheral wall of the connecting post 1 along its length and a second threaded groove 31 formed on the inner peripheral wall of the shaft hole of the connecting ring 3. The first threaded groove 14 and the second threaded groove 31 are threadedly connected to realize the connection between the connecting ring 3 and the connecting post 1. A plurality of guide blocks 15 are evenly distributed circumferentially on the outer peripheral wall at the end of the connecting post 1. The radial cross-section of the guide block 15 is trapezoidal. The guide structure includes... The system includes several guide grooves 211 circumferentially formed on the inner peripheral wall of the buffer hole 21. Each guide groove 211 corresponds to a guide block 15, and each guide block 15 is inserted into the corresponding guide groove 211. The shape of the guide groove 211 is adapted to the shape of the guide block 15. The guide block 15 is slidably disposed in the guide groove 211. The base 2 is made of hard rubber material. The connecting column 1 is provided with a protective sleeve for protecting the connecting column 1. The protective sleeve is made of plastic material, and the inner peripheral wall of the shaft hole of the protective sleeve is clearance-fitted with the outer peripheral wall of the connecting column 1. The protective sleeve is movably sleeved on the connecting column 1 along the length direction of the connecting column 1.
[0019] The foregoing has shown and described the basic principles and main features of this utility model, as well as its advantages. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications may be made to this utility model without departing from its spirit and scope. All such changes and modifications fall within the scope of protection of this utility model as defined by the appended claims and their equivalents.
Claims
1. A detachable cushioning sofa leg assembly, characterized in that: The device includes a connecting column and a base. The connecting column has a connecting hole running through it along its length. A connecting bolt is threaded into the connecting hole for threaded engagement with a pre-embedded hole at the corner of an external sofa. The base has a buffer hole for partial insertion of the end of the connecting column. A first buffer element is provided in the buffer hole to buffer a portion of the high force when the connecting column is subjected to axial force. A second buffer element is provided between the connecting column and the base to buffer a portion of the high force when the connecting column is subjected to axial force. An adjustment structure is provided on the connecting column to work in conjunction with the second buffer element to adjust the buffering force of the second buffer element. A guide structure is provided in the buffer hole to guide and position the movement direction of the connecting column.
2. The detachable cushioning sofa leg assembly according to claim 1, characterized in that: The first buffer component includes a first buffer spring disposed in a buffer hole. The beginning of the first buffer spring is abutted against the bottom of the connecting post, and the end of the first buffer spring is connected to the bottom wall of the buffer hole. The first buffer spring is made of manganese steel.
3. The detachable cushioning sofa leg assembly according to claim 1, characterized in that: The second buffer component includes a second buffer spring sleeved on the connecting column. The end of the second buffer spring is connected to the top wall of the base. The beginning of the second buffer spring is provided with a connecting ring. The connecting ring is coaxial with the connecting column and is detachably connected. The second buffer spring is made of high carbon steel.
4. A detachable cushioning sofa leg assembly according to claim 3, characterized in that: The adjustment structure includes a first threaded groove formed on the outer peripheral wall of the connecting column along the length direction of the connecting column and a second threaded groove formed on the inner peripheral wall of the shaft hole of the connecting ring. The first threaded groove and the second threaded groove are threadedly connected to realize the connection and cooperation between the connecting ring and the connecting column.
5. A detachable cushioning sofa leg assembly according to claim 1, characterized in that: The outer peripheral wall at the end of the connecting column is evenly distributed with a number of guide blocks in a circumferential direction. The radial cross-section of the guide blocks is trapezoidal. The guide structure includes a number of guide grooves circumferentially opened on the inner peripheral wall of the buffer hole. The number of guide grooves corresponds one-to-one with the number of guide blocks, and each guide block is inserted into the corresponding guide groove. The shape of the guide groove is adapted to the shape of the guide block, and the guide block is slidably disposed in the guide groove.
6. A detachable cushioning sofa leg assembly according to claim 1, characterized in that: The base is made of hard rubber, and a protective sleeve is provided on the connecting column to protect the connecting column. The protective sleeve is made of plastic and the inner peripheral wall of the shaft hole of the protective sleeve is fitted with the outer peripheral wall of the connecting column with a clearance. The protective sleeve is movably sleeved on the connecting column along the length direction of the connecting column.