Rotary locking mechanism and vehicle-mounted welfare seat

Abstract

The utility model belongs to the technical field of vehicle seats, and particularly relates to a rotary locking mechanism and a vehicle-mounted welfare seat, the rotary locking mechanism comprises an arc-shaped gear plate, a driving module, a needle bearing, a locking plate and a locking pin, the arc-shaped gear plate and the locking pin are assembled at the bottom of a seat rotating part, the driving module is arranged on a mounting frame in a vehicle body, and the driving module comprises a driving rotating plate and the locking plate. A driving gear and a needle bearing are arranged on the driving rotating plate, the driving module drives the arc-shaped gear plate so that the seat can rotate out of or be retracted into the vehicle body, a manual retracting mode is provided, and the driving gear on the driving rotating plate is separated from matching teeth on the arc-shaped gear plate so that the seat can be retracted and locked. The technical problem that in the prior art, a rotary unlocking mechanism of a vehicle seat is not flexible enough, and the seat needs to be adjusted to a specific unlocking position to enable the seat not to be limited by an original mechanical locking structure is solved.

Description

Technical Field

[0001] This utility model belongs to the field of vehicle seat technology, specifically a rotary locking mechanism and a vehicle-mounted welfare seat. Background Technology

[0002] To facilitate boarding and alighting for people with mobility impairments, some existing vehicle models are equipped with rotating and lifting seats. These seats can be moved to the outside of the vehicle and lowered in height via a rotating lifting frame, making it easier for people with mobility impairments to get on and off.

[0003] However, existing vehicle seat rotation unlocking mechanisms require the seat to be adjusted to a "specific unlocking position" before it can be rotated out of the vehicle without being restricted by the original mechanical locking structure. This results in repetitive actions, which lengthen the movement stroke and time of the mechanism. If the drive motor is simply used for locking, the requirements of seat strength testing cannot be met. Summary of the Invention

[0004] To address the technical problem that existing vehicle seat rotation unlocking mechanisms are not flexible enough and require the seat to be adjusted to a "specific unlocking position" before it can be freed from the limitations of the original mechanical locking structure, this application proposes a rotation locking mechanism and an in-vehicle welfare seat, which solves the aforementioned technical problem.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] This utility model provides a rotary locking mechanism, comprising: an arc-shaped gear plate fixed to the bottom of a seat rotating component; a mating tooth formed on the outer arc of the arc-shaped gear plate; a retaining tooth block protruding away from the center at one end of the mating tooth; a rotating tooth segment formed on the other end of the mating tooth; and a pushing tooth section formed at the smooth transition between the retaining tooth block and the rotating tooth segment. A drive module mounted on a vehicle body mounting bracket includes a drive rotating plate and a drive gear disposed on the drive rotating plate; a long, narrow movable groove is formed in the middle of the drive rotating plate. A connecting post is fitted at the moving slot, and the drive rotating plate is movably connected to the mounting bracket inside the vehicle body via the connecting post. The drive rotating plate has three extension ends. The first extension end of the drive rotating plate near the retaining tooth block is formed as a separation end. The drive gear is disposed between the separation end and the moving slot. A mating post is formed on the second extension end of the drive rotating plate extending away from the separation end. A first elastic element is disposed on the drive rotating plate. One end of the first elastic element is connected between the second extension end of the drive rotating plate and the moving slot, and the other end of the first elastic element is connected to... On the mounting bracket inside the vehicle body, the drive plate, under the combined action of the first elastic element and the needle roller bearing, causes the drive gear to abut against the arc-shaped gear plate and mesh with the mating teeth. When the drive gear rotates, it pushes the arc-shaped gear plate to rotate, allowing the seat to rotate out or retract into the vehicle body. The needle roller bearing is disposed on the third extension end of the drive plate extending to the inner arc of the arc-shaped gear plate. Under the action of mechanical engagement, the needle roller bearing abuts against the inner arc of the arc-shaped gear plate. At the same time, a groove for accommodating the needle roller bearing is formed on the inner arc of the arc-shaped gear plate. When the drive gear meshes with the retaining tooth block and the pushing tooth, the needle roller bearing engages within the groove; the locking plate, the middle of which is rotatably mounted on the vehicle body mounting bracket via a rotating pin, has an elongated limiting groove formed on the locking plate to accommodate the mating pin, a second elastic element is connected to the first end of the locking plate, one end of the second elastic element is connected to the locking plate, and the other end of the second elastic element is connected to the vehicle body mounting bracket, and a locking hook is formed on the second end of the locking plate. Under the combined action of the second elastic element and the needle roller bearing, the locking plate hooks the locking pin and holds it in place;A locking pin, fixed to the bottom of the seat rotating component, is engaged with the retaining gear block when the seat is locked in the vehicle body. The locking pin is hooked by the locking hook of the locking plate. In electronic control mode, the driving gear rotates to the pushing tooth section and moves towards the rotating tooth segment. The arc-shaped gear plate is pushed by the driving gear, causing the mating column to overcome the force of the second elastic element and push the locking plate, gradually releasing the locking hook from the locking pin. When the driving gear fully rotates to the rotating tooth segment, the locking pin disengages from the locking hook. The driving gear continues to move along the rotating tooth segment until it reaches the far end of the rotating tooth segment. As the seat rotates out of the vehicle body from one end of the retaining tooth block, a manual retraction mode is provided after the seat rotates out. In manual retraction mode, the separating end of the drive plate overcomes the elastic force of the first elastic element and moves away from the arc-shaped gear plate under the action of external force, causing the drive gear to disengage from the mating teeth. During the process of the drive plate moving away from the arc-shaped gear plate, the mating post of the drive plate acts on the locking plate, causing the locking plate to rotate against the force of the second elastic element, thereby causing the hook of the locking hook to face the upcoming locking pin, continuing to rotate and retract the seat until the locking pin strikes the locking hook, completing the retraction and locking.

[0007] Furthermore, the drive module also includes a drive motor for driving the drive gear to rotate, and the drive motor is fixed on the drive plate.

[0008] Furthermore, both the first elastic element and the second elastic element are tension springs.

[0009] Furthermore, a recess is formed on the drive plate near the arc-shaped gear plate, and the recess is used to configure the drive gear.

[0010] Another aspect of this utility model provides a vehicle-mounted welfare seat, which is mounted on a vehicle body using the rotary locking mechanism described above. The vehicle-mounted welfare seat includes a sensing connection device, which includes: a frame, which is elliptically mounted on a seat fixing base, with a vertically oriented mounting surface formed at the access end of the frame, and a horizontally extending alignment post and a docking switch fixed on the mounting surface; a docking piece, which is vertically formed at the tail end of the seat's lower base plate, and has a switch sensing block and a slot with a wide opening and a narrow closing. After the seat's lower base plate is moved horizontally above the frame, the docking piece abuts against the mounting surface, and the alignment post is inserted into the slot from a horizontal direction. Simultaneously, the switch sensing block triggers the docking switch; and a host computer, which, upon receiving information that the docking switch has been triggered, controls the alignment post of the frame to rise, and the alignment post moves from the opening end to the closing end of the slot, completing the guiding and positioning of the seat's lower base plate and folding up the seat.

[0011] Furthermore, the mounting surface of the frame is also provided with a magnet for adsorbing the docking piece, and the docking piece is made of iron.

[0012] Furthermore, a circumferentially expanding limiting cap is formed at the end of the alignment post away from the frame.

[0013] Based on the above technical solution, the technical effects that this utility model can achieve are as follows:

[0014] This utility model discloses a rotary locking mechanism. An arc-shaped gear plate is mounted at the bottom of the seat rotating component, and a drive gear is mounted on the vehicle body mounting bracket. The drive gear meshes with mating teeth on the arc-shaped gear plate. After the drive gear rotates, it drives the bottom of the seat rotating component to rotate out of or into the vehicle body mounting bracket via the arc-shaped gear plate. The drive gear itself is mounted on a drive plate, the middle of which is movably mounted on the vehicle body mounting bracket. The first extension end of the drive plate near the retaining tooth block is a separation end, and the drive gear is located near this separation end. A mating post is formed on the second extension end of the drive plate, which engages with a locking plate on the vehicle body mounting bracket, allowing the locking plate to be released from its locked state or placed in a state where it can receive the locking pin. A third extension end of the drive plate is provided with a mechanism that can abut against... The needle roller bearing on the inner arc of the arc-shaped gear plate, under the action of mechanical cooperation, is tangent to the inner arc of the arc-shaped gear plate, making the entire movement process smoother, the meshing pitch smaller, and preventing tooth skipping. Meanwhile, the mating teeth on the outer arc of the arc-shaped gear plate have three parts: a retaining tooth block, a pushing tooth section, and a rotating tooth section. When the seat is locked in the vehicle body, i.e., when the mechanism is in the locked state, the driving gear meshes with the retaining tooth block, and the needle roller bearing remains in the groove on the inner arc of the arc-shaped gear plate. Under the action of the second elastic element, the locking pin is hooked and held by the locking plate's hook. When the seat is about to rotate out of the vehicle body, i.e., when the mechanism is in the unlocking process, the driving gear meshes with the pushing tooth section, and the needle roller bearing moves in the groove on the inner arc of the arc-shaped gear plate. The driving gear and... When the teeth engage, relative to the locked state, the drive plate gradually moves closer to the arc-shaped gear plate. During this movement, the mating pin of the drive plate pushes open the locking hook of the locking plate, allowing the locking pin to gradually disengage. In the subsequent rotation of the seat, i.e., when the mechanism is in the unlocked state, the drive gear engages with the rotating teeth, and the locking pin is completely disengaged from the locking hook. The drive gear drives the drive plate to rotate. When the drive gear reaches the end of the drive plate furthest from the retaining teeth, the seat rotates to its limit position. Furthermore, because the drive plate engages with the arc-shaped gear plate under the combined action of the first elastic element and the needle roller bearing, the drive gear meshes with the mating teeth on the arc-shaped gear plate. This means that the original engagement between the drive plate and the arc-shaped gear plate can be disrupted by external force. The relationship between the driving gear and the mating teeth is such that, specifically, after the force exerted by the first elastic element on the drive plate is overcome by external force, the drive plate rotates relative to the arc-shaped gear plate. The disengaged end of the rotated drive plate moves away from the arc-shaped gear plate, causing the driving gear to move away from the mating teeth. The second extended end of the drive plate, where the mating post is located, approaches the arc-shaped gear plate. The needle roller bearing also rotates with the drive plate, moving from one tangent position to another. During the rotation of the drive plate due to external force, the driving gear and the arc-shaped gear plate no longer mesh. Simultaneously, the mating post of the drive plate can control the action of the locking plate. Thus, without interfering with the original drive module, the locking, unlocking, and seat movement of the mechanism can be achieved anytime, anywhere via manual mode.This allows the vehicle seat rotation mechanism equipped with a rotation locking mechanism to operate in both electronic and manual modes, solving the technical problem in existing vehicle seat rotation unlocking mechanisms that are not flexible enough and require the seat to be adjusted to a "specific unlocking position" before it can be retracted into the vehicle;

[0015] The inductive connection device for the vehicle-mounted welfare seat of this utility model eliminates multiple positioning components at the horizontal mating point of the seat fixing base and the seat base plate compared to the original solution. This avoids the risk of deformation and abnormal noise. In the original solution, the positioning components are arranged on the horizontal mating surface of the seat fixing base and the seat base plate. The first end of the seat base plate moves towards the access end of the seat fixing base until the seat base plate is about to completely cover the seat fixing base. At this point, the positioning components guide and position the rear end of the seat base plate. During the guiding and positioning process, the positioning components inevitably collide with the seat base plate, producing abnormal noise. Repeated collisions can also cause deformation of the positioning components, the seat base plate, or the seat fixing base. The inductive connection device for the vehicle-mounted welfare seat of this utility model eliminates the risk of deformation and abnormal noise. The positioning and docking device for the fixed seat and the seat base plate is arranged in the vertical direction at the rear end. When the seat base plate is about to completely cover the seat fixed seat, the alignment post on the seat fixed seat is inserted into the slot of the seat base plate in the horizontal direction. The alignment post is first inserted into the wide opening of the slot, and the minimum inner diameter of the slot opening is significantly larger than the maximum outer diameter of the alignment post to prevent the alignment post from hitting the edge of the slot. Then, the frame on the seat fixed seat rises and the alignment post moves from the wide opening end of the slot to the narrow tail end, completing the guiding and positioning of the seat base plate and folding up the seat. This solves the technical problem in the original solution where the positioning component was placed at the horizontal mating point between the seat fixed seat and the seat base plate, which caused abnormal noise and deformation of related mating components during the seat folding process. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the rotary locking mechanism of this utility model;

[0017] Figure 2 This is a schematic diagram of the drive plate of this utility model;

[0018] Figure 3 This is a schematic diagram of the drive module of this utility model;

[0019] Figure 4 This is a schematic diagram of the rotary locking mechanism of this utility model in the unlocked state;

[0020] Figure 5 This is a schematic diagram of the rotary locking mechanism of this utility model during the unlocking process;

[0021] Figure 6 This is a schematic diagram of the rotary locking mechanism of this utility model in the locked state;

[0022] Figure 7 This is a schematic diagram of the rotary locking mechanism of this utility model when manually unlocking;

[0023] Figure 8 This is a schematic diagram of the vehicle-mounted welfare seat of this utility model;

[0024] Figure 9 This is a schematic diagram of the frame of this utility model at the assembly surface;

[0025] Figure 10 This is a schematic diagram of the docking piece of this utility model;

[0026] Figure 11 This is a schematic diagram of the inductive connection device of this utility model;

[0027] Figure 12 This is a schematic diagram of the inductive connection device of this utility model during the guiding and positioning process;

[0028] Figure 13 This is a schematic diagram of the inductive connection device of this utility model after the guiding and positioning is completed.

[0029] In this utility model: 1-arc-shaped gear plate, 11-holding tooth block, 12-rotating tooth segment, 13-pushing tooth part, 14-groove; 2-drive module, 21-drive rotating plate, 211-separation end, 212-fitting column, 213-moving groove, 22-drive gear, 221-drive motor, 23-first elastic element, 24-connecting column; 3-needle roller bearing; 4-locking plate, 41-limiting groove, 42-second elastic element, 43-locking hook, 44-rotating pin; 5-locking pin;

[0030] 100-Frame, 101-Assembly surface, 102-Alignment post, 103-Dating switch, 104-Pot magnet; 200-Dating piece, 201-Switch sensing block, 202-Card slot. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0032] like Figure 1-8As shown, this utility model provides a rotary locking mechanism, including an arc-shaped gear plate 1, a drive module 2, a needle roller bearing 3, a locking plate 4, and a locking pin 5. The arc-shaped gear plate 1 is fixed to the bottom of the seat rotating component. A mating tooth is formed on the outer arc of the arc-shaped gear plate 1. One end of the mating tooth protrudes away from the center to form a retaining tooth block 11. The other part of the mating tooth forms a rotating tooth segment 12. A pushing tooth section 13 is formed at the smooth transition between the retaining tooth block 11 and the rotating tooth segment 12. The drive module 2 is mounted on a mounting bracket inside the vehicle body and includes a drive rotating plate 21 and a drive gear 22 disposed on the drive rotating plate 21. A long, narrow movable groove 213 is formed in the middle of the drive rotating plate 21. A connecting post 24 is fitted into the movable groove 213. The drive rotating plate 21 is flexibly connected to the connecting post 24. The drive plate 21 is dynamically connected to the mounting bracket inside the vehicle body. It has three extended ends. The first extended end of the drive plate 21 near the retaining tooth block 11 forms a separating end 211. A drive gear 22 is disposed between the separating end 211 and the movable groove 213. A mating post 212 is formed on the second extended end of the drive plate 21 extending away from the separating end 211. A first elastic element 23 is disposed on the drive plate 21. One end of the first elastic element 23 is connected between the second extended end of the drive plate 21 and the movable groove 213, and the other end is connected to the mounting bracket inside the vehicle body. Under the combined action of the first elastic element 23 and the needle roller bearing 3, the drive plate 21 causes the drive gear 22 to abut against the arc-shaped gear plate 1 and mesh with the mating teeth. 2. When rotated, the arc-shaped gear plate 1 is driven to rotate, causing the seat to rotate out or retract into the vehicle body. The needle roller bearing 3 is disposed on the third extended end of the drive plate 21 extending to the inner arc of the arc-shaped gear plate 1. Under the action of the first elastic member 23, the needle roller bearing 3 abuts against the inner arc of the arc-shaped gear plate 1. At the same time, a groove 14 for receiving the needle roller bearing 3 is formed on the inner arc of the arc-shaped gear plate 1. When the drive gear 22 meshes with the retaining tooth block 11 and the pushing tooth 13, the needle roller bearing 3 is engaged in the groove 14. The middle part of the locking plate 4 is rotatably mounted on the mounting bracket in the vehicle body through the rotating pin 44. A long strip-shaped limiting groove 41 for receiving the mating post 212 is formed on the locking plate 4. A second elastic member 42 is connected to the first end of the locking plate 4. One end of the second elastic member 42 is connected to the lock. On plate 4, the other end of the second elastic element 42 is connected to the mounting bracket inside the vehicle body. A locking hook 43 is formed on the second end of the locking plate 4. Under the combined action of the second elastic element 42 and the needle roller bearing 3, the locking plate 4 hooks and holds the locking pin 5. The locking pin 5 is fixed to the bottom of the seat rotating component. When the seat is locked inside the vehicle body, the drive gear 22 of the drive plate 21 meshes with the retaining tooth block 11, and the locking pin 5 is hooked by the locking hook 43 of the locking plate 4. In the electric control mode, the drive gear 22 rotates to the pushing tooth section 13 and moves towards the rotating tooth section 12. The arc-shaped gear plate 1 is pushed by the drive gear 22, which drives the mating column 212 to overcome the force of the second elastic element 42 and push the locking plate 4, so that the locking hook 43 gradually releases the limit on the locking pin 5. When the drive gear 22 rotates completely to the rotating tooth section 12...Lock pin 5 disengages from lock hook 43, and drive gear 22 continues to move on rotating tooth segment 12 until the end of rotating tooth segment 12 is away from holding tooth block 11. The seat rotates out of the vehicle body. Additionally, a manual retraction mode is provided after the seat rotates out of the vehicle body. In manual retraction mode, the separating end 211 of drive plate 21 overcomes the elastic force of the first elastic element 23 and moves away from arc-shaped gear plate 1 under the action of external force, causing drive gear 22 to disengage from the mating teeth. During the process of drive plate 21 moving away from arc-shaped gear plate 1, the mating post 212 of drive plate 21 acts on lock plate 4, causing lock plate 4 to rotate against the force of the second elastic element 42, thereby causing the hook of lock hook 43 to face the approaching lock pin 5, continuing to rotate and retract the seat until lock pin 5 strikes into lock hook 43, completing the retraction and locking process.

[0033] It should be noted that there is a height difference between the arc-shaped gear plate 1 and the drive rotating plate 21, and part of the drive rotating plate 21 can overlap with the arc-shaped gear plate 1 in the horizontal direction; for example Figure 1 and 7 As shown, when the drive plate 21 rotates counterclockwise, the needle roller bearing 3 can move away from the arc gear plate 1. After moving away from the arc gear plate 1 from the tangent point on the right, it rotates counterclockwise by an angle and then becomes tangent to the arc gear plate 1 again at the tangent point on the left.

[0034] In one specific embodiment of the present invention, the drive module 2 further includes a drive motor 221 for driving the drive gear 22 to rotate, and the drive motor 221 is fixed on the drive rotating plate 21.

[0035] In one specific embodiment of this utility model, the first elastic element 23 and the second elastic element 42 are both tension springs, and both can be connected to the mounting bracket inside the vehicle body by a connecting pin.

[0036] In one specific embodiment of this utility model, a recess is formed on the drive plate 21 near the arc-shaped gear plate 1. The recess is used to configure the drive gear 22, making the overall structure more compact.

[0037] like Figure 8-13As shown, this utility model also provides a vehicle-mounted welfare seat, which is assembled onto the vehicle body via the aforementioned rotary locking mechanism. The vehicle-mounted welfare seat includes a sensor connection device, which includes a frame 100, a docking piece 200, and a host computer. The frame 100 is flexibly mounted on the seat fixing base. The access end of the frame 100 forms a vertically oriented mounting surface 101. A horizontally extending alignment post 102 and a docking switch 103 are fixed on the mounting surface 101. The docking piece 200 is vertically formed at the rear end of the seat's lower base plate. The upper part has a switch sensing block 201 and a slot 202 with a wide opening and a narrow closing. After the seat bottom plate is moved horizontally above the frame 100, the mating piece 200 abuts against the assembly surface 101, and the alignment post 102 is inserted into the slot 202 from the horizontal direction. At the same time, the switch sensing block 201 triggers the mating switch 103. After receiving the information that the mating switch 103 has been triggered, the host computer controls the alignment post 102 of the frame 100 to rise. The alignment post 102 moves from the opening end of the slot 202 to the closing end, completing the guiding and positioning of the seat bottom plate and folding up the seat.

[0038] In a preferred embodiment of this utility model, a magnet 104 for adsorbing the docking piece 200 is also provided on the mounting surface 101 of the frame 100. Correspondingly, the docking piece 200 is made of iron. The magnet 104 adsorbs the docking piece 200. After the magnet 104 adsorbs the docking piece 200, it can prevent the independent seat where the seat bottom plate is located from detaching from the frame 100 before it has been guided and positioned, thus avoiding the occurrence of slippage.

[0039] In a preferred embodiment of the present invention, a circumferentially expanding limiting cap is formed at the end of the alignment post 102 away from the frame 100. During the wire positioning process, the limiting cap can abut against the side of the docking piece 200 away from the frame 100 to prevent the independent seat from detaching from the frame 100 before the guide positioning is complete.

[0040] In a preferred embodiment of the present invention, there is a pair of alignment posts 102 on the assembly surface 101, which are symmetrically arranged on both sides of the docking switch 103.

[0041] The vehicle-mounted welfare seat of this utility model is used as follows: the person with mobility impairment first sits on the independent seat. The independent seat is moved horizontally above the seat fixing seat through the guide device. It is guided and positioned by the sensor connection device. The frame 100 on the seat fixing seat rises and retracts the independent seat. Then, the seat is rotated and retracted into the vehicle body through the rotation locking mechanism and locked in the vehicle, completing a whole set of retraction actions.

[0042] It should be understood that the specific embodiments described above are only for explaining the present invention and are not intended to limit the present invention. Obvious variations or modifications derived from the spirit of the present invention are still within the protection scope of the present invention.

Claims

1. A rotary locking mechanism, characterized in that, include: Arc-shaped gear plate (1) is fixed to the bottom of the seat rotating component. The outer arc of the arc-shaped gear plate (1) has a mating tooth. One end of the mating tooth protrudes away from the center to form a retaining tooth block (11). The other part of the mating tooth forms a rotating tooth segment (12). The smooth transition between the retaining tooth block (11) and the rotating tooth segment (12) forms a pushing tooth part (13). A drive module (2) is mounted on a vehicle body mounting bracket and includes a drive plate (21) and a drive gear (22) disposed on the drive plate (21). A long, narrow movable groove (213) is formed in the middle of the drive plate (21), and a connecting post (24) is fitted at the movable groove (213). The drive plate (21) is movably connected to the vehicle body mounting bracket via the connecting post (24). The drive plate (21) has three extended ends. The first extended end of the drive plate (21) near the retaining tooth block (11) is formed as a separating end (211). The separating end (211) and the movable groove (213) are connected... The drive gear (22) is configured between the drive plate (21) and the second extension end extending away from the separation end (211) is formed with a mating post (212). The drive plate (21) is configured with a first elastic element (23). One end of the first elastic element (23) is connected between the second extension end of the drive plate (21) and the movable groove (213). The other end of the first elastic element (23) is connected to the mounting bracket inside the vehicle body. The drive gear (22) abuts against the arc-shaped gear plate (1) and meshes with the mating teeth. When the drive gear (22) rotates, it pushes the arc-shaped gear plate (1) to rotate so that the seat can rotate out or retract into the vehicle body. A needle roller bearing (3) is disposed on the third extension end of the drive plate (21) extending to the inner arc of the arc gear plate (1). The needle roller bearing (3) abuts against the inner arc of the arc gear plate (1) under the action of mechanical cooperation. Under the dual action of the first elastic element (23) and the needle roller bearing (3), the drive plate (21) causes the drive gear (22) to abut against the arc gear plate (1) and mesh with the mating teeth. At the same time, a groove (14) for receiving the needle roller bearing (3) is formed on the inner arc of the arc gear plate (1). When the drive gear (22) meshes with the retaining tooth block (11) and the pushing tooth (13), the needle roller bearing (3) is fitted in the groove (14). Locking plate (4), the middle part of which is rotatably mounted on the mounting bracket inside the vehicle body via a rotating pin (44), the locking plate (4) has an elongated limiting groove (41) for receiving the mating pin (212), a second elastic element (42) is connected to the first end of the locking plate (4), one end of the second elastic element (42) is connected to the locking plate (4), and the other end of the second elastic element (42) is connected to the mounting bracket inside the vehicle body, a locking hook (43) is formed on the second end of the locking plate (4), and under the combined action of the second elastic element (42) and the needle roller bearing (3), the locking plate (4) hooks the locking pin (5) and holds it. Locking pin (5), which is fixed to the bottom of the seat rotating component, when the seat is locked in the vehicle body, the drive gear (22) of the drive plate (21) meshes with the retaining tooth block (11), and the locking pin (5) is hooked by the locking hook (43) of the locking plate (4). In the electric control mode, the drive gear (22) rotates to the pushing tooth (13) and moves towards the rotating tooth segment (12). The arc-shaped gear plate (1) is pushed by the drive gear (22), which drives the mating column (212) to overcome the force of the second elastic element (42) and push the locking plate (4) so ​​that the locking hook (43) gradually releases the restriction on the locking pin (5). When the drive gear (22) rotates completely to the rotating tooth segment (12), the locking pin (5) disengages from the locking hook (43), and the drive gear (22) continues on the rotating tooth segment (12). When the rotating tooth segment (12) moves away from the end of the retaining tooth block (11), the seat rotates out of the vehicle body. Additionally, after the seat rotates out of the vehicle body, a manual retraction mode is provided. In the manual retraction mode, the separating end (211) of the drive plate (21) overcomes the elastic force of the first elastic element (23) and moves away from the arc gear plate (1) under the action of external force, causing the drive gear (22) to disengage from the mating tooth. During the process of the drive plate (21) moving away from the arc gear plate (1), the mating column (212) of the drive plate (21) acts on the locking plate (4), causing the locking plate (4) to rotate against the force of the second elastic element (42), thereby causing the hook of the locking hook (43) to face the upcoming locking pin (5), and continue to rotate to retract the seat until the locking pin (5) hits the locking hook (43), completing the retraction and locking.

2. The rotary locking mechanism according to claim 1, characterized in that, The drive module (2) also includes a drive motor (221) for driving the drive gear (22) to rotate, and the drive motor (221) is fixed on the drive plate (21).

3. The rotary locking mechanism according to claim 1, characterized in that, Both the first elastic element (23) and the second elastic element (42) are tension springs.

4. The rotary locking mechanism according to claim 1, characterized in that, The drive plate (21) has a recess near the arc-shaped gear plate (1), and the recess is used to arrange the drive gear (22).

5. A vehicle-mounted welfare seat, characterized in that, The vehicle-mounted welfare seat is mounted on the vehicle body via a rotary locking mechanism as described in any one of claims 1-4, and the in-vehicle connection device includes a sensing connection device comprising: A frame (100) is vertically mounted on a seat fixing base. The access end of the frame (100) forms a vertical mounting surface (101). A horizontally extending alignment post (102) and a docking switch (103) are fixed on the mounting surface (101). A docking piece (200) is vertically formed at the tail end of the seat under plate. A switch sensing block (201) and a slot (202) with a wide opening and a narrow closing are formed on the docking piece (200). After the seat under plate is moved to the top of the frame (100), the docking piece (200) abuts against the assembly surface (101). The alignment post (102) is inserted into the slot (202) from the horizontal direction. At the same time, the switch sensing block (201) triggers the docking switch (103). After receiving the information that the docking switch (103) is triggered, the host computer controls the alignment column (102) of the frame (100) to rise. The alignment column (102) moves from the opening end of the slot (202) to the closing end, completing the guiding and positioning of the seat bottom plate and folding up the seat.

6. The vehicle-mounted welfare seat according to claim 5, characterized in that, The mounting surface (101) of the frame (100) is also provided with a pot magnet (104) for adsorbing the docking piece (200), and the docking piece (200) is made of iron.

7. The vehicle-mounted welfare seat according to claim 5, characterized in that, The end of the alignment post (102) away from the frame (100) has a circumferentially expanding limiting cap.

Images