Ball socket for a car seat
By optimizing the gap design and R-angle structure of the ball joint in automotive seats, and combining it with high-strength materials, the stress concentration problem was solved, stress was evenly distributed, the service life of the ball joint was extended, and the stability and load-bearing capacity of the structure were improved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGSU YASHI TECH CO LTD
- Filing Date
- 2025-08-04
- Publication Date
- 2026-07-03
AI Technical Summary
Traditional ball-and-socket structures suffer from uneven stress distribution under high-frequency vibration and long-term load, which can easily lead to localized stress concentration, causing cracks, affecting service life, and potentially posing safety hazards.
By optimizing the gap design and the R-angle structure, and combining high-strength nylon material, aluminum alloy reinforced base layer and carbon fiber reinforcing ribs, stress is evenly distributed, local stress concentration is avoided, and structural stability and load-bearing capacity are enhanced.
It effectively prevents crack formation, extends service life, improves the crack resistance and overall strength of the ball joint, ensures stable operation under complex working conditions, and enhances the support and stability of seat components.
Smart Images

Figure CN224453383U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of ball joint connectors for vehicle seats, specifically a ball joint for automobile seats. Background Technology
[0002] Ball joints are a common and highly practical connection method in the mechanical field, playing a crucial role in numerous applications. For example, in vehicle seats, ball joints allow for flexible adjustment of backrest angles and seating postures, greatly improving comfort and convenience. Industrial robotic arms also rely on them to achieve free rotation and precise positioning in multiple directions, meeting the needs of complex operations. The core advantages of this structure are significant: it provides components with high rotational flexibility, allowing them to move easily at different angles and directions, while ensuring stable connections and reliable support during rotation, effectively guaranteeing the normal operation of the machinery.
[0003] However, under complex working conditions of high-frequency vibration and long-term load, the structural characteristics of traditional ball-and-socket structures result in uneven stress distribution, which easily leads to stress concentration. This localized stress concentration will gradually damage the material and cause cracks. Once cracks are generated and propagate, they will affect the service life of the ball-and-socket structure and may also cause safety hazards. Utility Model Content
[0004] To address the shortcomings of existing technologies, this application provides a ball joint for automotive seats. By optimizing the gap design and radius (R-angle), it achieves uniform stress distribution, avoids local stress concentration, significantly improves the crack resistance of the ball joint, extends its service life, and enhances the support and stability of seat components while ensuring rotational flexibility. This ensures that the seat will not experience excessive displacement or damage due to shaking or vibration during vehicle operation, thus solving the problems mentioned in the background art.
[0005] To achieve the above objectives, this application provides the following technical solution: a ball joint for an automobile seat, comprising a ball joint body, the ball joint body comprising an outer ring and equidistantly arranged R-angles, the R-angles being integrally formed on the inner wall of the outer ring, the R-angles being configured as an R-shaped structure, and equidistant and parallel gaps being formed between the R-angles, the R-angles and gaps being arranged in a ring sequentially.
[0006] The above scheme aims to avoid stress concentration and optimize the crack resistance of the ball socket. By setting equidistant and parallel gaps, the contact stress of the ball head rotating in the socket is dispersed to multiple points, avoiding local stress concentration. By setting the R-angle of the R-shaped structure, the stress transmission path is further smoothed, and the stress peak is reduced, thereby effectively preventing the generation of cracks.
[0007] Furthermore, the ball socket body is made of high-strength nylon material.
[0008] Through the above solution, the ball socket body is made of high-strength nylon material. This material has good mechanical properties and can withstand greater external forces without being easily damaged, ensuring that the ball socket body has sufficient strength during use. At the same time, its excellent wear resistance can reduce wear when the ball socket rubs against other parts, extend its service life, and ensure the overall reliability and durability of the ball socket for automotive seats.
[0009] Furthermore, a reinforcing base layer is embedded in the center of the ball socket body, and the reinforcing base layer is made of aluminum alloy.
[0010] Through the above solution, the reinforced base layer made of aluminum alloy has high strength, which can significantly enhance the structural strength of the ball socket body, making it less prone to damage when subjected to large loads. Moreover, aluminum alloy is lightweight, so it can enhance the structural strength without excessively increasing the overall weight of the ball socket body, which is beneficial to the lightweight design of car seats.
[0011] Furthermore, the reinforced base layer includes a base ring and a base corner. The base ring is adapted to the shape of the outer ring and is centrally embedded inside the outer ring. The base corner is adapted to the shape of the R-corner and is centrally embedded inside the R-corner.
[0012] The above solution ensures that the reinforced base layer fits closely to the shape of the ball joint body, providing comprehensive reinforcement to all key parts of the ball joint body, improving the overall load-bearing capacity and stability of the ball joint, and ensuring that the ball joint can function normally during the adjustment of the car seat.
[0013] Furthermore, the base ring and base corner are integrally formed.
[0014] Through the above-mentioned solution, the one-piece molding process can ensure the connection strength between the base ring and the base corner, avoiding loosening or damage caused by insufficient strength of the connection part. At the same time, the one-piece molding makes the overall structure of the reinforced base layer more stable and reliable. When the ball socket body is under stress, it can better transmit and disperse stress as a whole, improve the overall performance of the ball socket, and extend its service life.
[0015] Furthermore, a reinforcing rib is embedded in the center of the reinforced base layer, and the reinforcing rib is made of carbon fiber.
[0016] Through the above solutions, the addition of reinforcing ribs can further improve the strength and stability of the ball socket, enabling it to maintain structural integrity even when subjected to greater external forces. Moreover, the lightweight properties of carbon fiber will not add too much weight to the ball socket, which helps to reduce the weight of the car seat, while improving the load-bearing capacity of the ball socket and meeting the usage requirements of the car seat under various working conditions.
[0017] Furthermore, the reinforcing rib includes a reinforcing ring and a reinforcing rod, with the reinforcing ring centrally embedded inside the base ring and the reinforcing rod centrally embedded inside the base corner.
[0018] The above-mentioned solution enables the reinforcing ribs to provide targeted reinforcement to different parts of the base layer. The reinforcing ring can enhance the strength of the base ring, and the reinforcing rod can enhance the strength of the base corner, thereby further improving the overall load-bearing capacity and stability of the ball socket, ensuring that the ball socket will not deform or be damaged when subjected to complex external forces, and guaranteeing the normal use of the car seat.
[0019] Furthermore, the reinforcing ring and the reinforcing rod are integrally formed.
[0020] The above-mentioned design ensures a tight connection between the various parts of the reinforcing rib, enabling the reinforcing rib to function as a whole. When the ball socket is under stress, the reinforcing ring and reinforcing rod can work together better to effectively transfer stress, avoid stress concentration in local areas, improve the overall load-bearing capacity and deformation resistance of the ball socket, and extend the service life of the ball socket.
[0021] Compared with the prior art, the technical solution of this application has the following beneficial effects:
[0022] This ball joint for automotive seats, by setting equidistant and parallel gaps, disperses the contact stress of the ball head when rotating within the joint to multiple points, avoiding localized stress concentration. The R-shaped structure with R-angle further smooths the stress transmission path and reduces stress peaks, thereby effectively preventing crack formation. The addition of an aluminum alloy reinforcing base and carbon fiber reinforcing ribs further improves the overall strength of the ball joint and optimizes its crack resistance. Attached Figure Description
[0023] Figure 1 This is a three-dimensional structural diagram of the entire application;
[0024] Figure 2 This is a structural diagram of the ball-and-socket body of this application;
[0025] Figure 3 This application includes a diagram of the reinforced base structure.
[0026] Figure 4 This is a structural diagram of the reinforcing ribs in this application;
[0027] Figure 5 This is a front view of the overall cross-section of this application.
[0028] In the picture:
[0029] 1. Ball socket body; 101. Outer ring; 102. Radius (R-angle); 103. Gap; 2. Reinforcing base layer; 201. Base ring; 202. Base angle; 3. Reinforcing rib; 301. Reinforcing ring; 302. Reinforcing rod. Detailed Implementation
[0030] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0031] Please see Figure 1 , Figure 3 and Figure 4 The ball joint for a car seat in this embodiment includes a ball joint body 1. The ball joint body 1 includes an outer ring 101 and equidistantly arranged R-angles 102. The R-angles 102 are integrally formed on the inner wall of the outer ring 101. The R-angles 102 are set as R-shaped structures. Equidistant and parallel gaps 103 are formed between the R-angles 102. The R-angles 102 and the gaps 103 are arranged in a ring.
[0032] Please see Figure 1 and Figure 2 The ball socket body 1 is made of high-strength nylon material. This material has good mechanical properties and can withstand greater external forces without being easily damaged, ensuring that the ball socket body 1 has sufficient strength during use. At the same time, its excellent wear resistance can reduce wear when the ball socket rubs against other parts, extend its service life, and ensure the overall reliability and durability of the ball socket for car seats.
[0033] Please see Figure 3 , Figure 4 and Figure 5 The ball socket body 1 has a reinforcing base 2 embedded in the center. The reinforcing base 2 is made of aluminum alloy. The aluminum alloy reinforcing base 2 has high strength, which can significantly enhance the structural strength of the ball socket body 1, making it less prone to damage when subjected to large loads. Moreover, aluminum alloy is lightweight, which can enhance the structural strength without increasing the overall weight of the ball socket body 1 too much, which is conducive to the lightweight design of car seats.
[0034] Please see Figure 3 , Figure 4 and Figure 5 The reinforcing base layer 2 includes a base ring 201 and a base corner 202. The base ring 201 is adapted to the shape of the outer ring 101 and is centrally embedded inside the outer ring 101. The base corner 202 is adapted to the shape of the R-corner 102 and is centrally embedded inside the R-corner 102. This allows the reinforcing base layer 2 to closely fit the shape of the ball socket body 1, providing comprehensive reinforcement to all key parts of the ball socket body 1, improving the overall load-bearing capacity and stability of the ball socket, and ensuring that the ball socket can work normally during the adjustment of the car seat.
[0035] Please see Figure 3 , Figure 4 and Figure 5 The base ring 201 and the base corner 202 are integrally formed. The integral forming process can ensure the connection strength between the base ring 201 and the base corner 202, avoiding loosening or damage caused by insufficient strength of the connection part. At the same time, the integral forming makes the overall structure of the reinforced base layer 2 more stable and reliable. When the ball socket body 1 is under stress, it can better transmit and disperse stress as a whole, improve the overall performance of the ball socket, and extend its service life.
[0036] Please see Figure 4 and Figure 5 The reinforcing base 2 has a reinforcing rib 3 embedded in the center. The reinforcing rib 3 is made of carbon fiber. The addition of the reinforcing rib 3 can further improve the strength and stability of the ball socket, so that it can maintain the integrity of the structure when subjected to greater external forces. Moreover, the lightweight characteristics of carbon fiber will not add too much weight to the ball socket, which helps to reduce the weight of the car seat, while improving the load-bearing capacity of the ball socket and meeting the usage requirements of the car seat under various working conditions.
[0037] Please see Figure 4 and Figure 5 The reinforcing rib 3 includes a reinforcing ring 301 and a reinforcing rod 302. The reinforcing ring 301 is centrally embedded inside the base ring 201, and the reinforcing rod 302 is centrally embedded inside the base corner 202. This allows the reinforcing rib 3 to provide targeted reinforcement to different parts of the base layer 2. The reinforcing ring 301 can enhance the strength of the base ring 201, and the reinforcing rod 302 can enhance the strength of the base corner 202, thereby further improving the overall load-bearing capacity and stability of the ball socket, ensuring that the ball socket will not deform or be damaged when subjected to complex external forces, and guaranteeing the normal use of the car seat.
[0038] Please see Figure 4 and Figure 5 The reinforcing ring 301 and the reinforcing rod 302 are integrally molded. The integral molding design ensures a tight connection between the various parts of the reinforcing rib 3, enabling the reinforcing rib 3 to function as a whole. When the ball socket is under stress, the reinforcing ring 301 and the reinforcing rod 302 can work together better to effectively transfer stress, avoid stress concentration in local areas, improve the overall load-bearing capacity and deformation resistance of the ball socket, and extend the service life of the ball socket.
[0039] In this embodiment, a ball joint for an automotive seat, by setting equidistant and parallel gaps 103, disperses the contact stress of the ball head when rotating within the ball joint to multiple points, avoiding local stress concentration. By setting an R-shaped R-angle 102, the stress transmission path is further smoothed, reducing stress peaks and effectively preventing crack formation. By setting an aluminum alloy reinforcing base layer 2 and a carbon fiber reinforcing rib 3, the overall strength of the ball joint body 1 is further improved, optimizing the crack resistance of the ball joint body 1.
[0040] It should be noted that the aluminum alloy reinforcing base layer 2 and the carbon fiber reinforcing rib 3 can, to a certain extent, meet the elastic deformation requirements of the ball socket body 1.
[0041] The working principle of the above embodiments is as follows:
[0042] The inner wall of the outer ring 101 of the ball socket body 1 is provided with equidistant and parallel gaps 103. When the ball head rotates in the ball socket, the contact stress is distributed to multiple points, avoiding local stress concentration. At the same time, the R-angle 102 of the R-shaped structure further smooths the stress transmission path, reduces stress peaks, effectively prevents crack formation, and ensures the stability of the ball socket structure. The ball socket body 1, made of high-strength nylon material, has good mechanical properties, enabling it to withstand large external forces without easily being damaged. Its excellent wear resistance reduces wear when rubbing against other parts, thereby extending the service life of the ball socket and ensuring the overall reliability and durability of the ball socket for automotive seats. The high-strength aluminum alloy reinforced base layer 2 enhances the structural strength of the ball socket body 1, enabling it to withstand large loads without easily being damaged. Furthermore, aluminum alloy is lightweight, which enhances structural strength without excessively increasing the overall weight of the ball socket body 1, which is beneficial for the lightweight design of automotive seats. The base ring 201 and base angle 202 are tightly fitted to the shape of the ball socket body 1. The design comprehensively reinforces all key components of the ball socket body 1, improving its overall load-bearing capacity and stability. The carbon fiber reinforcing ribs 3 possess high strength, high rigidity, and lightweight characteristics, further enhancing the ball socket's strength and stability. This allows it to maintain structural integrity even under greater external forces without adding excessive weight, contributing to the lightweighting of automotive seats. Simultaneously, it improves the ball socket's load-bearing capacity, meeting the usage requirements of automotive seats under various operating conditions. The reinforcing ring 301 of the reinforcing rib 3 is centrally embedded inside the base ring 201, and the reinforcing rod 302 is centrally embedded inside the base corner 202. This design allows the reinforcing rib 3 to provide targeted reinforcement to different parts of the reinforced base layer 2. The reinforcing ring 301 enhances the strength of the base ring 201, and the reinforcing rod 302 enhances the strength of the base corner 202, thereby further improving the overall load-bearing capacity and stability of the ball socket. This ensures that the ball socket will not deform or be damaged under complex external forces, guaranteeing the normal use of the automotive seat.
[0043] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.
[0044] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A ball socket for a car seat comprising a ball socket body (1), characterized in that: The ball socket body (1) includes an outer ring (101) and equidistantly arranged R-angles (102). The R-angles (102) are integrally formed on the inner wall of the outer ring (101). The R-angles (102) are configured as R-shaped structures. Equidistant and parallel gaps (103) are formed between the R-angles (102). The R-angles (102) and gaps (103) are arranged in a ring.
2. A ball socket for a vehicle seat according to claim 1, characterized in that: The ball socket body (1) is made of high-strength nylon material.
3. A ball socket for a vehicle seat according to claim 1, characterized in that: The ball socket body (1) is centrally embedded with a reinforcing base layer (2), which is made of aluminum alloy.
4. A ball socket for a vehicle seat according to claim 3, wherein: The reinforced base layer (2) includes a base ring (201) and a base corner (202). The base ring (201) is adapted to the shape of the outer ring (101) and is centrally embedded inside the outer ring (101). The base corner (202) is adapted to the shape of the R corner (102) and is centrally embedded inside the R corner (102).
5. A ball socket for a vehicle seat according to claim 4, wherein: The base ring (201) and base corner (202) are integrally formed.
6. A ball socket for a vehicle seat according to claim 3, wherein: The reinforcing base layer (2) is centrally embedded with a reinforcing rib (3), which is made of carbon fiber.
7. A ball socket for a vehicle seat according to claim 6, characterized in that: The reinforcing rib (3) includes a reinforcing ring (301) and a reinforcing rod (302). The reinforcing ring (301) is centrally embedded inside the base ring (201), and the reinforcing rod (302) is centrally embedded inside the base corner (202).
8. A ball socket for a vehicle seat according to claim 7, characterized in that: The reinforcing ring (301) and the reinforcing rod (302) are integrally formed.