Turntable locking structure, seat assembly and automobile with same

Abstract

The invention discloses a turntable locking structure, a seat assembly and an automobile, the turntable locking structure comprises a locking module, the locking module comprises an outer locking ring and an inner locking ring mounted on an inner ring, and a driven bulge and a fixed bulge are arranged on the outer side wall of the inner locking ring; a locking cavity is formed among the driven bulge, the fixed bulge, the inner side wall of the outer locking ring and the outer side wall of the inner locking ring; elastic pieces and locking pieces are arranged on the two sides of the fixed protrusion, and a driving protrusion is arranged on the side face of the driving disc and extends into the locking cavity; the inner side wall of the outer locking ring or / and the outer side wall of the inner locking ring of the locking cavity is / are constructed into a wedging inclined surface; the locking piece is clamped at the narrower part of the wedging inclined surface under the elastic force action of the elastic piece so as to realize the locking of the locking module; the driving protrusion drives the locking piece to press the elastic piece so that the locking module can be unlocked and rotate. The automobile seat locking mechanism is simple and compact in structure and capable of being matched with a limited space below an automobile seat, the locking cavities are mutually independent, loads are evenly distributed, the service life of the mechanism is effectively prolonged, and durability is high.

Description

Technical Field

[0001] This invention relates to the field of automotive seat technology, specifically to a turntable locking structure, a seat assembly, and the automotive thereof. Background Technology

[0002] In the current automotive market, seat rotation functionality is gradually becoming a mainstream feature in MPVs, multi-purpose vehicles (MPVs), and motorhomes. By rotating the seats, passengers can sit face-to-face, expand interior space, or adapt to storage and rest scenarios, significantly improving the vehicle's spatial flexibility and user experience. The turntable locking structure is the core safety component for realizing this function; its locking reliability and ease of operation directly affect passenger safety and user experience.

[0003] However, existing rotary locking structures for car seats mostly employ a design with multiple rollers sharing a common elastic element. This results in problems such as uneven preload distribution, weak vibration resistance during locking, easy jamming during unlocking, and rapid wear. Furthermore, the complex structure occupies a large space, making it difficult to adapt to the limited installation area under the seat, and may also affect the layout of surrounding components such as the slide rail. Therefore, there is an urgent need for a rotary locking structure that can meet the core requirements of car seats for high reliability, convenient operation, and compact layout. Summary of the Invention

[0004] To solve the above technical problems, the present invention provides a compact, easy-to-use, and durable turntable locking structure, seat assembly, and automobile thereof.

[0005] The technical solution is as follows:

[0006] A turntable locking structure includes a locking module, wherein the locking module includes an outer locking ring and an inner locking ring installed on the inner ring of the outer locking ring. The key point is that: driven protrusions and fixed protrusions are arranged alternately on the outer side wall of the inner locking ring, and adjacent driven protrusions and fixed protrusions form a locking cavity with the inner side wall of the outer locking ring and the outer side wall of the inner locking ring.

[0007] Elastic elements are provided on both sides of the fixed protrusion, and a locking element is provided on the outer side of the elastic element.

[0008] It also includes a drive disk, on the side of which a drive protrusion is arranged, the drive protrusion extending into the locking cavity, and the drive protrusion being located between the driven protrusion and the locking member;

[0009] The inner wall of the outer locking ring and / or the outer wall of the inner locking ring of the locking cavity are constructed into a wedge-shaped inclined surface. The locking element, under the elastic force of the elastic element, engages at the narrower part of the wedge-shaped inclined surface to lock the locking module. The driving protrusion drives the locking element to press against the elastic element, thereby unlocking the locking module. With this structure, the locking element and elastic element are configured within the locking cavity, enabling locking by engaging the wedge-shaped inclined surface and the narrower part of the inner wall of the outer locking ring. Unlocking is achieved by pushing the driving protrusion under the action of the driving disc. This structure is compact, does not occupy additional space, and each locking cavity is independent and does not interfere with others, improving the smoothness of use and the stability of locking, and reducing safety hazards.

[0010] Preferably, the locking element is a roller or a wedge block. Using the above structure, locking is achieved through the engagement of the roller or wedge block with the wedge-shaped inclined surface, and different locking elements can be adapted to different application scenarios.

[0011] Preferably, the elastic element is a compression spring, with one end of each elastic element in the locking cavity connected to the fixed protrusion, and the other end connected to the locking element. With this structure, the elastic element provides a continuous and stable preload to the locking element, ensuring that the locking element always tends to move towards the narrower section between the wedge-shaped inclined surface and the inner wall of the outer locking ring, thus achieving locking. Furthermore, the elastic element can counteract a certain vibration gap, and during unlocking, it undergoes elastic deformation under the action of the driving protrusion, allowing the locking element to disengage from the wedge-tight state and unlock. When the driving protrusion stops, the elastic element can also push the locking element back to its original position.

[0012] Preferably, the wedge-shaped inclined surface is disposed on the outer wall of the inner locking ring, and the wedge-shaped inclined surface is disposed on the outer wall of the inner locking ring on both sides of the fixed protrusion. The distance from the wedge-shaped inclined surface to the inner wall of the outer locking ring gradually increases as it approaches the fixed protrusion. When the elastic element is in a free state, the locking element is engaged at the narrower point between the wedge-shaped inclined surface and the inner wall of the outer locking ring, and the locking module is locked. When all the locking elements located on the left side of the fixed protrusion compress the elastic element, the locking module is unlocked, and the inner locking ring can rotate clockwise. When all the locking elements located on the right side of the fixed protrusion compress the elastic element, the locking module is unlocked, and the inner locking ring can rotate counterclockwise. With the above structure, the locking element and the elastic element can cooperate with the wedge-shaped inclined surface in the locking cavity to achieve locking and unlocking, and can rotate in different directions according to the usage.

[0013] Preferably, the driving protrusion unlocks the locking member located to the left of the fixed protrusion, and the driving protrusion located to the right of the fixed protrusion contacts the driven protrusion, driving the inner locking ring to rotate clockwise; the driving protrusion unlocks the locking member located to the right of the fixed protrusion, and the driving protrusion located to the left of the fixed protrusion contacts the driven protrusion, driving the inner locking ring to rotate counterclockwise. This structure enables simultaneous unlocking and rotation, avoiding the stuttering or lag caused by step-by-step operations and improving the smoothness of the turntable locking structure's rotation.

[0014] Preferably, the device further includes an upper housing and a lower housing. Connecting holes are provided at corresponding positions near the outer edge of the upper housing, the lower housing, and the outer locking ring, and fastening screws are inserted into the connecting holes. The inner locking ring is fitted and disposed above the lower housing.

[0015] An isolation pad is provided between the lower housing and the inner locking ring and locking cavity. With this structure, the upper and lower housings and the outer locking ring are connected and fixed by fastening screws, while the inner locking component is surrounded between the upper and lower housings, forming a single unit. The isolation pad separates the locking component and elastic component within the locking cavity from the lower housing, preventing abnormal noise during use and reducing the frictional resistance of the locking component during rotation.

[0016] Preferably, the drive disc is disposed between the upper housing and the inner locking ring, and a drive gear is fixedly sleeved on the outside of the drive disc. A drive protrusion is arranged on the side of the drive disc near the inner locking ring, and the drive protrusion extends into the locking cavity. With this structure, when the drive gear rotates, it drives the drive disc to rotate as well, thereby pushing the locking element to press against the elastic element, causing it to disengage from the wedged state, thus achieving unlocking and rotation.

[0017] Preferably, a motor is installed on the side of the upper housing, with its output end connected to an external splined shaft. A transmission gear is fixedly fitted onto the external splined shaft, and this transmission gear is installed between the upper housing and the outer locking ring. The external splined shaft can pass through the transmission gear and extend into the mounting sleeve of the outer locking ring. The transmission gear meshes with the drive gear. With this structure, the motor can sequentially transmit power to the external splined shaft and the transmission gear, and then to the drive gear, thereby driving the drive protrusion to rotate, achieving unlocking and rotation.

[0018] A seat assembly, the key feature of which is that it includes the aforementioned turntable locking structure, which is disposed between the seat frame and the seat slide rail. Using this structure, the seat can be safely and reliably locked and rotated.

[0019] A type of automobile, the key feature of which is that it includes the aforementioned seat assembly. Adopting this structure can significantly improve the flexibility of interior space and passenger comfort.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows: the overall structure is compact, does not occupy additional space, can effectively adapt to the limited space under the car seat, does not affect the arrangement of surrounding components, and each locking cavity is equipped with a locking element and an elastic element, so that each locking cavity is independent of each other and does not interfere with each other, and can cooperate with the wedge-tightening inclined surface to achieve locking. It can simultaneously achieve unlocking and rotation under the action of the driving convex, so that the unlocking and rotation process is smooth and without jamming. Multiple independent locking cavities evenly distribute the load, effectively extending the service life of the mechanism, adapting to the long-term high-frequency rotation requirements of the seat, and has strong durability. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the present invention;

[0022] Figure 2 This is an exploded view of the present invention;

[0023] Figure 3 for Figure 1 A schematic diagram showing the structure with the motor 8 and upper housing 1 removed.

[0024] Figure 4 for Figure 3 A schematic diagram of the structure with the drive disk 7 and motor 8 removed;

[0025] Figure 5 This is a side sectional view of the present invention;

[0026] Figure 6 A schematic diagram of the locking state of the rollers inside the locking cavity;

[0027] Figure 7 for Figure 6 Enlarged diagram of A in the middle;

[0028] Figure 8 This is a diagram illustrating the unlocked state.

[0029] Figure 9 This is a diagram showing the locking state of the wedge block inside the locking cavity 15. Detailed Implementation

[0030] The present invention will be further described below with reference to the embodiments and accompanying drawings.

[0031] like Figures 1 to 9As shown, the turntable locking structure includes a locking module, which includes an outer locking ring 3 and an inner locking ring 4 installed on the inner ring of the outer locking ring 3. Driven protrusions 4a and fixed protrusions 4b are arranged alternately on the outer side wall of the inner locking ring 4. Adjacent driven protrusions 4a and fixed protrusions 4b form a locking cavity 15 between the inner side wall of the outer locking ring 3 and the outer side wall of the inner locking ring 4.

[0032] Elastic elements 6 are provided on both sides of the fixed protrusion 4b, and locking elements 5 are provided on the outer side of the elastic elements 6.

[0033] It also includes a drive disk 7, on which a drive protrusion 7a1 is arranged on the side. The drive protrusion 7a1 extends into the locking cavity 15 and is located between the driven protrusion 4a and the locking member 5.

[0034] The inner wall of the outer locking ring 3 and / or the outer wall of the inner locking ring 4 of the locking cavity 15 are constructed into a wedge-shaped inclined surface. The locking member 5 is locked in the narrow part of the wedge-shaped inclined surface under the elastic force of the elastic member 6 to achieve the locking of the locking module. The driving protrusion 7a1 drives the locking member 5 to press the elastic member 6 to achieve the unlocking of the locking module.

[0035] like Figures 6 to 9 As shown, each locking cavity 15 is equipped with a locking element 5 and an elastic element 6. The locking element 5 can be a roller or a wedge block, and different locking elements 5 can be selected according to different usage scenarios. When the roller is used as the locking element 5, the engagement is mainly achieved by rolling friction. It has low friction loss, long service life, smooth operation and excellent NVH performance, sensitive locking and unlocking response, and low processing and assembly difficulty, making it suitable for the high-frequency rotation usage scenario of car seats. When the wedge block is used as the locking element 5, it is wedge-tightened by surface contact, with strong locking rigidity, high load-bearing capacity, good self-locking stability and outstanding anti-loosening ability.

[0036] The elastic element 6 is a compression spring. One end of the elastic element 6 in the locking cavity 15 is connected to the fixed protrusion 4b, and the other end is connected to the locking element 5. The elastic element 6 can provide a continuous and stable preload to the locking element 5, so that the locking element 5 always has a tendency to move towards the narrower part of the wedge-shaped inclined surface and the inner sidewall of the outer locking ring 3 to achieve locking. It can also offset a certain vibration gap. At the same time, when unlocking, it can undergo elastic deformation under the action of the driving protrusion 7a1, allowing the locking element 5 to disengage from the wedge-tight state and achieve unlocking. When the driving protrusion 7a1 stops, the elastic element 6 can also push the locking element 5 to reset.

[0037] The locking units within each locking cavity 15 are independent and do not interfere with each other. Even if the locking element 5 or elastic element 6 in a single locking cavity 15 experiences slight wear, it will not affect the overall locking function. This avoids the problem of "all are damaged if one is damaged" when multiple locking elements share an elastic element, significantly improving locking stability under driving vibration and reducing safety hazards. Furthermore, all elastic elements 6 are connected to the fixed protrusion 4b, ensuring even distribution around the circumference of the inner locking ring 4. This prevents interference between adjacent units, and the locking load is evenly distributed across multiple locking cavities 15, avoiding concentrated stress on a single component. This extends the overall service life of the mechanism and is suitable for the long-term, high-frequency rotation requirements of car seats.

[0038] The wedge-shaped inclined surface is disposed on the outer wall of the inner locking ring 4, and the wedge-shaped inclined surface is disposed on the outer wall of the inner locking ring 4 on both sides of the fixed protrusion 4b. The distance from the wedge-shaped inclined surface to the inner wall of the outer locking ring 3 gradually increases as it approaches the fixed protrusion 4b. When the elastic member 6 is in a free state, the locking member 5 is stuck at the narrower part between the wedge-shaped inclined surface and the inner wall of the outer locking ring 3, and the locking module is locked. When all the locking members 5 located on the left side of the fixed protrusion 4b compress the elastic member 6, the locking module is unlocked, and the inner locking ring 4 can rotate clockwise. When all the locking members 5 located on the right side of the fixed protrusion 4b compress the elastic member 6, the locking module is unlocked, and the inner locking ring 4 can rotate counterclockwise.

[0039] The driving protrusion 7a1 drives the locking member 5 located to the left of the fixed protrusion 4b to unlock, and the driving protrusion 7a1 located to the right of the fixed protrusion 4b contacts the driven protrusion 4a, driving the inner locking ring 4 to rotate clockwise; the driving protrusion 7a1 drives the locking member 5 located to the right of the fixed protrusion 4b to unlock, and the driving protrusion 7a1 located to the left of the fixed protrusion 4b contacts the driven protrusion 4a, driving the inner locking ring 4 to rotate counterclockwise.

[0040] When rotating clockwise, the drive protrusions 7a1 on both sides of the fixed protrusion 4b perform the actions of "pushing the locking element 5 to unlock" and "pushing the driven protrusion 4a of the inner locking ring 3 to rotate," respectively. When rotating counterclockwise, the drive protrusions 7a1 on both sides of the fixed protrusion 4b perform the actions of "pushing the driven protrusion 4a of the inner locking ring 3 to rotate" and "pushing the locking element 5 to unlock," respectively. Whether rotating clockwise or counterclockwise, the unlocking and rotating actions are performed simultaneously, avoiding the stuttering or lag caused by separate operations and improving the smoothness of the turntable locking structure's rotation.

[0041] Furthermore, the magnitude of the force exerted by the drive protrusions 7a1 on the left and right sides is matched and the direction of force application is symmetrically distributed; at the same time, the pre-tightening reaction force of the elastic element 6 on both sides of the locking element 5 is also corresponding to each other, so that the circumferential force of the entire locking module forms a balanced system, and there will be no situation where the force on one side is too large, thus avoiding the "off-center load" problem caused by the imbalance of force in the mechanism from the root.

[0042] like Figure 1 , Figure 2 and Figure 5 As shown, it also includes an upper housing 1 and a lower housing 2. Connecting holes are provided at corresponding positions near the outer edge of the upper housing 1, the lower housing 2 and the outer locking ring 3, and fastening screws 9 are inserted in the connecting holes. The upper housing 1, the lower housing 2 and the outer locking ring 3 can be connected into a whole by fastening screws 9. The inner locking ring 4 is fitted on the upper part of the lower housing 2 and can be contained between the upper housing 1 and the lower housing 2.

[0043] An isolation pad 13 is provided between the lower housing 2, the inner locking ring 4, and the locking cavity 15. The inner edge of the isolation pad 13 is positioned corresponding to the inner locking ring 4, allowing it to fit snugly against the bottom surface of the inner locking ring 4. This isolation pad 13 separates the locking element 5 and the elastic element 6 within the locking cavity 15 from the lower housing 2, preventing collisions and noises that could affect the performance of the device during operation.

[0044] like Figures 1 to 6 As shown, the drive disk 7 is disposed between the upper housing 1 and the inner locking ring 4. A drive gear 7b is fixedly sleeved on the outside of the drive disk 7. The drive protrusion 7a1 is arranged on the side of the drive disk 7 near the inner locking ring 4. The drive protrusion 7a1 extends into the locking cavity 15.

[0045] A motor 8 is provided on the side of the upper housing 1. The output end of the motor 8 is connected to an external spline shaft 8a. A transmission gear 10 is fixedly sleeved on the external spline shaft 8a. The transmission gear 10 is installed between the upper housing 1 and the outer locking ring 3. The external spline shaft 8a can pass through the transmission gear 10 and extend into the mounting sleeve of the outer locking ring 3. The transmission gear 10 meshes with the drive gear 7b.

[0046] When the motor 8 is working, the power generated is transmitted to the external spline shaft 8a. The external spline shaft 8a engages with the inner spline of the transmission gear 10, which drives the transmission gear 10 to rotate. The transmission gear 10 meshes with the drive gear 7b, thus transmitting the power further to the drive disc 7, causing the drive disc 7 to rotate with the drive gear 7b. This allows the drive protrusion 7a1 on the drive disc 7 to push the locking member 5 to compress the elastic member 6 to unlock, and pushes the driven protrusion 4a to rotate the inner locking ring 4.

[0047] This turntable locking structure adopts an independent locking unit design of "single locking cavity - single locking element - single elastic element", such as Figures 6 to 9 As shown, its locked, unlocked, rotated, and reset states are as follows:

[0048] In the locked state, under the thrust of the elastic element 6, the locking element 5 gradually moves towards the narrower section between the wedge-tightening inclined surface and the inner wall of the outer locking ring 3, gradually wedging the locking element 5 until the locking state is achieved. All locking units in the locking cavities 15 synchronously complete the above wedging action, with the preload of each unit evenly distributed and without mutual interference, ensuring that the locking force is evenly transmitted along the circumference and improving the resistance to vibration and loosening.

[0049] During unlocking, the driving protrusion 7a1 in the locking cavity 15 on one side of the fixed protrusion 4b moves the locking member 5 towards a narrower area away from the wedge-tightening slope and the inner wall of the outer locking ring 3, compressing the elastic member 6. This releases the rigid constraint between the outer locking ring 3 and the inner locking ring 4, restoring their relative rotational freedom. Meanwhile, the locking member 5 and the wedge-tightening slope in the locking cavity 15 on the other side of the fixed protrusion 4b remain wedge-tight, but the driving protrusion 7a1 in this locking cavity 15 pushes the driven protrusion 4a, thereby achieving the rotation of the inner locking ring 4.

[0050] Once unlocking is complete, the drive disc 7 stops rotating, and the elastic element 6 can push the locking element 5 back into the narrower section between the wedge-tightening inclined surface and the inner wall of the outer locking ring 3 to achieve locking. All locking units in the locking cavities 15 are synchronously reset, waiting for the next locking command to be triggered.

[0051] The design of a single chamber, a single locking element, and a single elastic element ensures that each locking unit operates independently and is highly controllable. This avoids the problem of uneven preload caused by multiple locking elements sharing the same elastic element, and also achieves a smooth and seamless locking / unlocking process, meeting the high-frequency and high-reliability usage requirements of car seats.

[0052] A seat assembly including the aforementioned turntable locking structure, the turntable locking structure being disposed between the seat frame and the seat slide rail.

[0053] A first mounting screw 14 is also provided at corresponding positions on the upper housing 1 and the outer locking ring 3. The first mounting screw 14 is upwardly positioned to connect with the corresponding seat frame portion. A washer 16 is also provided between the first mounting screw 14 and the outer locking ring 3. The inner locking ring 4 is located above the lower housing 2, and a second mounting screw 12 is provided on the inner locking ring 4. The second mounting screw 12 is downwardly positioned to connect with the corresponding seat slide rail. By integrating the turntable lock structure under the seat with the first mounting screw 14 and the second mounting screw 12, no additional space is required. It can adapt to the limited space under the car seat, does not affect the arrangement of surrounding components, and allows the seat to meet various user needs while ensuring safety.

[0054] An automobile includes the aforementioned seat assembly, which can be used in the automobile to significantly improve the interior space flexibility and passenger comfort, thus enhancing the in-car experience.

[0055] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention. Those skilled in the art, under the guidance of the present invention, can make various similar representations without departing from the spirit and claims of the present invention, and such modifications all fall within the protection scope of the present invention.

Claims

1. A turntable locking structure, comprising a locking module, the locking module comprising an outer locking ring (3) and an inner locking ring (4) installed on the inner ring of the outer locking ring (3), characterized in that: Driven protrusions (4a) and fixed protrusions (4b) are arranged alternately on the outer side wall of the inner locking ring (4), and a locking cavity (15) is formed between adjacent driven protrusions (4a) and fixed protrusions (4b) and the inner side wall of the outer locking ring (3) and the outer side wall of the inner locking ring (4). Elastic members (6) are provided on both sides of the fixed protrusion (4b), and a locking member (5) is provided on the outer side of the elastic member (6). It also includes a drive disk (7), on which a drive protrusion (7a1) is arranged on the side. The drive protrusion (7a1) extends into the locking cavity (15) and is located between the driven protrusion (4a) and the locking member (5). The inner wall of the outer locking ring (3) and / or the outer wall of the inner locking ring (4) of the locking cavity (15) are constructed into a wedge-shaped inclined surface. The locking member (5) is locked in the narrow part of the wedge-shaped inclined surface under the elastic force of the elastic member (6) to achieve the locking of the locking module. The driving protrusion (7a1) drives the locking member (5) to press the elastic member (6) to achieve the unlocking of the locking module.

2. The turntable locking structure according to claim 1, characterized in that: The locking element (5) is a roller or a wedge block.

3. The turntable locking structure according to claim 1 or 2, characterized in that: The elastic element (6) is a compression spring. One end of the elastic element (6) in the locking cavity (15) is connected to the fixed protrusion (4b), and the other end is connected to the locking element (5).

4. The turntable locking structure according to claim 1 or 2, characterized in that: The wedge-shaped inclined surface is provided on the outer wall of the inner locking ring (4), and the wedge-shaped inclined surface is provided on the outer wall of the inner locking ring (4) on both sides of the fixed protrusion (4b). The distance from the wedge-shaped inclined surface to the inner wall of the outer locking ring (3) gradually increases as it approaches the fixed protrusion (4b). When the elastic element (6) is in a free state, the locking element (5) is stuck at the narrower part between the wedge-shaped inclined surface and the inner wall of the outer locking ring (3), and the locking module is locked. When all the locking elements (5) located on the left side of the fixed protrusion (4b) compress the elastic element (6), the locking module is unlocked, and the inner locking ring (4) can rotate clockwise. When all the locking elements (5) located on the right side of the fixed protrusion (4b) compress the elastic element (6), the locking module is unlocked, and the inner locking ring (4) can rotate counterclockwise.

5. The turntable locking structure according to claim 4, characterized in that: The driving protrusion (7a1) drives the locking member (5) located to the left of the fixed protrusion (4b) to unlock, and the driving protrusion (7a1) located to the right of the fixed protrusion (4b) contacts the driven protrusion (4a), driving the inner locking ring (4) to rotate clockwise; the driving protrusion (7a1) drives the locking member (5) located to the right of the fixed protrusion (4b) to unlock, and the driving protrusion (7a1) located to the left of the fixed protrusion (4b) contacts the driven protrusion (4a), driving the inner locking ring (4) to rotate counterclockwise.

6. The turntable locking structure according to claim 1 or 2, characterized in that: It also includes an upper housing (1) and a lower housing (2). Connection holes are provided at corresponding positions near the outer edge of the upper housing (1), the lower housing (2) and the outer locking ring (3), and fastening screws (9) are inserted in the connection holes for connection. The inner locking ring (4) is fitted and disposed above the lower housing (2). An isolation pad (13) is provided between the lower housing (2) and the inner locking ring (4) and the locking cavity (15).

7. The turntable locking structure according to claim 6, characterized in that: The drive disk (7) is disposed between the upper housing (1) and the inner locking ring (4). A drive gear (7b) is fixedly sleeved on the drive disk (7). The drive protrusion (7a1) is arranged on the side of the drive disk (7) near the inner locking ring (4). The drive protrusion (7a1) extends into the locking cavity (15).

8. The turntable locking structure according to claim 7, characterized in that: A motor (8) is provided on the side of the upper housing (1). The output end of the motor (8) is connected to an external spline shaft (8a). A transmission gear (10) is fixedly fitted on the external spline shaft (8a). The transmission gear (10) is installed between the upper housing (1) and the external locking ring (3). The external spline shaft (8a) can pass through the transmission gear (10) and extend into the mounting sleeve of the external locking ring (3). The transmission gear (10) meshes with the drive gear (7b).

9. A seat assembly, characterized in that: Includes the turntable locking structure as described in any one of claims 1-8, wherein the turntable locking structure can be disposed between the seat frame and the seat slide rail.

10. A car, characterized in that: Includes the seat assembly as described in claim 9.

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