Rotary locking mechanism, seat assembly and vehicle

Abstract

This disclosure relates to a rotary locking mechanism, comprising: a brake ring and a clamping member; a roller-elastic member assembly including a first roller, a second roller, and an elastic member; a drive disc having drive protrusions respectively mating with the roller-elastic member assembly, wherein the elastic member is disposed between the first roller and the second roller and simultaneously contacts the first roller and the second roller respectively; a wedge-tightening structure is formed by the inner circumferential surface of the brake ring and the outer circumferential surface of the clamping member; the roller-elastic member assembly can be disposed within the mating wedge-tightening structure, and when the drive disc is not rotating, the elastic member presses the first roller and the second roller to both sides respectively to wedge the first roller and the second roller tightly within the wedge-tightening structure. This disclosure also relates to a seat assembly and a transportation vehicle. This disclosure allows for the locking of a rotatable device that can be fixed to the rotary locking mechanism in one position with a simple structure.

Description

Technical Field

[0001] This disclosure relates to a rotary locking mechanism, a seat assembly, and a transportation vehicle. Background Technology

[0002] With the rapid development of the automotive industry, the demand for "emotional value" is increasing for high-end or luxury cars, and users expect the passenger cabin space to offer more practical and unique features. The demand for rotating seats is one such example.

[0003] A swivel chair typically consists of a seat and a rotating mechanism for rotating the seat. For swivel chairs, a crucial task is to securely lock the seat in its rotated position.

[0004] In addition, the rotating mechanism should also be able to be used for the rotation and locking of other devices that require rotation. Utility Model Content

[0005] The purpose of this disclosure is to provide a rotary locking mechanism by means of which a rotatable device that can be fixed to the rotary locking mechanism can be locked in one position with a simple structure.

[0006] Another object of this disclosure is to provide a seat assembly and a means of transportation.

[0007] The first aspect of this disclosure is a rotary locking mechanism configured to lock and unlock the rotational movement of a rotatable device. The rotary locking mechanism includes: a brake ring and a clamping member, a cavity formed between the inner circumferential surface of the brake ring and the outer circumferential surface of the clamping member; a plurality of roller-elastic element assemblies disposed within the cavity and including a first roller, a second roller, and an elastic element; a drive disk having drive protrusions respectively cooperating with the roller-elastic element assemblies, the drive protrusions extending axially and into the cavity; characterized in that the elastic element in the roller-elastic element assembly is disposed between the first roller and the second roller and simultaneously contacts the first roller and the second roller respectively; a wedge structure formed by the inner circumferential surface of the brake ring and the outer circumferential surface of the clamping member, the wedge structure being configured to receive the roller-elastic elements. The first and second rollers in the elastic element assembly and the wedge-tightening roller-elastic element assembly; and the wedge-tightening structure and the roller-elastic element assembly are configured such that the roller-elastic element assembly can be disposed within the mating wedge-tightening structure and, when the drive disc is not rotating, the elastic element in the roller-elastic element assembly presses the first and second rollers to both sides respectively to wedge the first and second rollers into the wedge-tightening structure, thereby locking the rotation locking mechanism; the wedge-tightening structure, the roller-elastic element assembly, and the drive protrusion are configured such that, when the drive disc rotates, a corresponding drive protrusion in the drive protrusion can contact and push one of the first and second rollers of the corresponding roller-elastic element assembly, thereby pressing the first roller and the second roller against the elastic element and disengaging from the wedge-tightening structure, while the other roller serves as a rotation support for the clamping element.

[0008] By employing the rotary locking mechanism of this disclosure, and by providing an elastic element, a first roller, and a second roller, along with a corresponding wedge-locking structure, a roller-elastic element assembly can simultaneously contact the first and second rollers on both sides. This allows the elastic element to simultaneously push and compress the first and second rollers to both sides, wedging them between the inner circumferential surface of the brake ring and the outer circumferential surface of the clamping member. This effectively locks and unlocks the rotational movement of the rotatable device, eliminating gaps and achieving a locking effect. This roller-elastic element assembly is structurally compact and simple, and, combined with the corresponding wedge-locking structure, achieves very robust wedging and locking. In conventional designs, a corresponding elastic element might be required for both the first and second rollers, in which case the first roller and its corresponding elastic element, as well as the second roller and its corresponding elastic element, would need to be spaced apart. Compared to the conventional design, the roller-elastic element assembly in the rotary locking mechanism of this disclosure is more advantageous in terms of component processing and matching, as well as assembly. Additionally, it allows for advantageous unlocking of the rotary locking mechanism during drive disc rotation and provides a rotary support after unlocking. In this disclosure, the "rotary support" can be understood as a rotary bearing, and the rollers used as the rotary support provide radial support for the rotation of the clamping member relative to the brake ring. Furthermore, in this disclosure, when the drive protrusion pushes one of the rollers to disengage from the wedge-tightening structure, the other roller can function as a rotary support and, through contact with the wedge-tightening structure, can also drive the clamping member to rotate to a certain extent.

[0009] In some embodiments, the clamping member includes a plurality of radially outwardly projecting first driven protrusions on its outer periphery, with n roller-elastic element assemblies and n+1 drive protrusions disposed between any two adjacent first driven protrusions. This allows for an advantageous, spaced-out arrangement of the roller-elastic element assemblies and drive protrusions. Furthermore, the number of roller-elastic element assemblies and drive protrusions can be selected according to requirements.

[0010] In some embodiments, n is 1, and the roller-elastic member assembly is arranged between two mating drive protrusions; or n is greater than or equal to 2, and the roller-elastic member assembly and drive protrusions are alternately arranged. This allows for an advantageous arrangement of the roller-elastic member assembly with respect to the drive protrusions.

[0011] In some embodiments, the driving protrusion and the first driven protrusion are configured such that when the drive disk rotates, another driving protrusion in the driving protrusion group can drive the first driven protrusion to move. Thus, one driving protrusion in the drive protrusion group of the drive disk can be responsible for contacting the roller for unlocking, while the other driving protrusion can drive the clamping member to rotate. This achieves functional division of labor among the driving protrusions in the drive protrusion group.

[0012] In some embodiments, the other drive protrusion can directly contact the first driven protrusion when the drive disc rotates, thereby directly driving the first driven protrusion to move. In conventional solutions, the drive protrusion pushes a roller via an elastic element to unlock, and then pushes the first driven protrusion via the same roller. This method has a relatively long force transmission link, and there is a certain degree of lag from the moment the drive protrusion contacts the elastic element to the moment it pushes the first driven protrusion, due to the inherent characteristics of the elastic element. Unlike conventional solutions, in this disclosure, the drive protrusions responsible for contacting the roller to unlock and those responsible for contacting the first driven protrusion of the clamping member are different, thus providing the possibility of reducing or mitigating this transmission lag.

[0013] In some embodiments, the driving protrusion and the first driven protrusion are configured such that when the drive disc rotates and one of the driving protrusions causes the roller to disengage from the wedging structure, the other driving protrusion can simultaneously or subsequently contact the first driven protrusion and drive it to move. Therefore, especially when the other driving protrusion contacts the first driven protrusion and drives it to move as the wedging structure disengages, rotational lag during unlocking can be significantly reduced.

[0014] In some embodiments, the driving protrusion and the first driven protrusion are configured such that another driving protrusion of the driving protrusion contacts the first driven protrusion shortly after the roller disengages from the wedging structure and drives the first driven protrusion to move. This can also reduce rotational lag in the unlocking situation to some extent.

[0015] In some embodiments, the other driving protrusion can indirectly drive the first driven protrusion to move when the drive disk rotates.

[0016] In some embodiments, between any two adjacent first driven protrusions, an additional roller-elastic element assembly is provided adjacent to each first driven protrusion. This additional roller-elastic element assembly includes a third roller and an additional elastic element, which is disposed between the corresponding first driven protrusion and the third roller. Furthermore, an additional wedging structure is formed between the inner circumferential surface of the brake ring and the outer circumferential surface of the clamping member. This additional wedging structure is configured to receive the additional roller-elastic element assembly and wed the third roller within it. When the drive disc rotates, the other driving protrusion can push the third roller, causing it to be pressed against the additional elastic element and disengaged from the additional wedging structure. Thus, the other driving protrusion drives the first driven protrusion to move via the third roller and the additional elastic element. Therefore, additional roller-elasticity assemblies can be provided adjacent to the first driven protrusion, thereby additionally providing locking force and thus providing a more reliable locking effect under confined space conditions. This solution achieves a good trade-off between hysteresis time and locking effect.

[0017] In some embodiments, the clamping member includes a plurality of radially outwardly protruding second driven protrusions on its outer periphery. A driving protrusion is disposed between the second driven protrusions and the inner circumferential surface of the brake ring. A driving protrusion and a corresponding second driven protrusion are respectively provided on both sides of a roller-elastic member assembly. The second driven protrusion, the roller-elastic member assembly, and the driving protrusion are configured such that after one of the first and second rollers is pressed against the elastic member and disengaged from the wedging structure, the other roller is pressed against the second driven protrusion via the elastic member. Thus, the driving protrusion can drive the second driven protrusion to move via the roller-elastic member assembly. This allows the radial space between the second driven protrusion and the inner circumferential surface of the brake ring to be "utilized" to arrange the driving protrusion, thereby enabling more roller-elastic member assemblies to be arranged in a limited space while ensuring the pushing action by the second driven protrusion, achieving a better locking effect.

[0018] In some embodiments, the clamping member includes a plurality of radially outwardly protruding third driven protrusions on its outer periphery. These third driven protrusions are located within a wedge-tightening structure. An elastic element is arranged between the third driven protrusions and the inner circumferential surface of the brake ring. Driving protrusions are provided on both sides of a roller-elastic element assembly. The third driven protrusions, the roller-elastic element assembly, and the driving protrusions are configured such that one of the first and second rollers, after being pressed against the elastic element and disengaged from the wedge-tightening structure, contacts the third driven protrusion. This allows the driving protrusion to move the third driven protrusion via the single roller. This allows the radial space between the third driven protrusion and the inner circumferential surface of the brake ring to be utilized to arrange the elastic element, enabling more roller-elastic element assemblies to be arranged within a limited space while ensuring the pushing action by the third driven protrusion, thus achieving a better locking effect.

[0019] In some embodiments, the same number of roller-elastic element assemblies and drive protrusions are provided, and the roller-elastic element assemblies and drive protrusions are arranged alternately. This allows for more roller-elastic element assemblies and drive protrusions to be provided within a limited space, thereby achieving a better locking effect.

[0020] In some embodiments, the tip of the first driven protrusion of the clamping member is radially spaced from the inner circumferential surface of the brake ring. This prevents friction between the clamping member and the brake ring during drive disc rotation, thereby reducing rotational resistance.

[0021] In some embodiments, n is greater than or equal to 2, and a pushing step is provided on the outer peripheral surface of the clamping member between at least two roller-elastic element assemblies. The pushing step, the roller-elastic element assembly, and the driving protrusion are configured such that after one of the first and second rollers is pressed against the elastic element and disengaged from the wedging structure, the other roller is pressed against the pushing step via the elastic element, thereby enabling the driving protrusion to move the pushing step via the roller-elastic element assembly. This allows for better pushing action via the pushing step, particularly by the additional driving protrusion driving the first driven protrusion to achieve a better pushing action.

[0022] In some embodiments, in the wedge-clamping structure, the inner circumferential surface of the brake ring is arc-shaped, and an additional pushing step is provided on the outer circumferential surface of the clamping member. An elastic body is arranged between the additional pushing step and the inner circumferential surface of the brake ring. The additional pushing step, the roller-elastic member assembly, and the driving protrusion are configured such that one of the first and second rollers, after being pressed against the elastic member and disengaged from the wedge-clamping structure, contacts the additional pushing step. This allows the driving protrusion to move the additional pushing step via the roller. Consequently, the additional pushing step achieves a better pushing effect, especially when combined with the other driving protrusion to drive the first driven protrusion to achieve a better pushing effect.

[0023] In some embodiments, the side of the drive protrusion facing the first or second roller has a recessed structure, and the shape of the recessed structure matches the shape of the first or second roller, so that the drive protrusion can conform to the first or second roller when it contacts it. Thus, when the drive protrusion contacts and pushes the first or second roller, the drive protrusion forms a surface contact with the corresponding roller, rather than a line contact, such as when the side of the drive protrusion is planar. This effectively prevents wear on the roller-facing side of the drive protrusion due to prolonged contact with the roller.

[0024] In some embodiments, the top tip of the drive protrusion of the drive disc is radially spaced from the inner circumferential surface of the brake ring. This prevents friction between the drive disc and the brake ring during rotation, thereby reducing rotational resistance.

[0025] In some embodiments, the elastic element is a spring or an elastomeric element made of an elastomer. This provides a good elastic element solution.

[0026] In some embodiments, the additional elastic element is a spring or an elastomeric element made of an elastomer. This provides a good elastic element solution.

[0027] In some embodiments, the rotary locking mechanism is constructed without welded structures. Therefore, welding processes can be avoided during the manufacture of the rotary locking mechanism, thus preventing the welding from causing thermal effects on the brake ring, clamping elements, and roller contact surfaces, and thereby avoiding a reduction in locking capability.

[0028] In some embodiments, the rotary locking mechanism is equipped with a drive motor capable of driving the drive disk to rotate. The rotary locking mechanism also includes a housing on which a bracket for mounting the drive motor is integrally formed. This provides a structurally suitable bracket structure for mounting the drive motor, avoiding more complex installation structures and additional assembly time due to a separately designed bracket structure.

[0029] In some embodiments, the rotary locking mechanism further includes a separate gear component that can be fixedly mounted on the drive disk, allowing the drive disk to rotate via gear transmission. This allows the power input and power output portions of the drive unit used to rotate the clamping member to be constructed separately; the power input portion can be a separate gear component, while the power output portion can be the drive disk, thereby reducing the machining or forming difficulty of the gear component and the drive disk respectively. Furthermore, the gear component can have its tooth profile individually adapted according to actual needs, allowing a single drive disk to be equipped with multiple gear components, for example, those with different tooth profiles, thus improving the flexibility of the drive disk and gear component combination. In this disclosure, the gear component can have internal teeth or external teeth.

[0030] In some embodiments, the gear is hollow and has external teeth, and includes a recessed mating portion on its inner circumference, while the drive disk includes a protruding portion on one side. A protruding mating portion is provided on the outer circumference of this protruding portion to engage with the recessed mating portion. The protruding portion of the drive disk can be inserted into the hollow portion of the gear, thereby forming a form-locking fit between the recessed and protruding mating portions. This achieves an advantageous form-locking fit between the gear and the drive disk.

[0031] In some embodiments, the rotary locking mechanism includes a housing with a snap-fit ​​portion and a cover plate with a window portion corresponding to the snap-fit ​​portion. The snap-fit ​​portion can engage with the window portion to snap the housing and the cover plate together. This snap-fit ​​connection between the housing and the cover plate can serve as a pre-assembly fixing means prior to the final threaded connection.

[0032] In some embodiments, the rotary locking mechanism includes a cover plate that is fixedly disposed on the brake ring and at least partially covers the cavity. An isolation washer is provided between the clamping member and / or the roller-elastic assembly and the cover plate. The isolation washer is configured to reduce noise generated by the movement of the clamping member and / or the roller-elastic assembly and / or to reduce the frictional resistance of the clamping member and / or the roller-elastic assembly during movement. This reduces or even eliminates abnormal noises caused by collisions between metal parts during movement, and reduces the frictional resistance of the metal parts during movement.

[0033] In some embodiments, the number of the plurality of roller-elastic element assemblies is chosen such that the plurality of roller-elastic element assemblies can lock the rotatable device carried by the clamping member of the rotary locking mechanism. Thus, good locking of the rotatable device can be achieved with a reasonable number of roller-elastic element assemblies.

[0034] In some embodiments, the wedge-tightening structure has a deformation-receiving portion in the middle region for accommodating the deformed elastic element. Thus, for example, when the elastic element is made of a volumetrically incompressible elastomer, radial deformation clearance space can be reserved for such elastomer.

[0035] In some embodiments, the contour of the wedge structure is configured such that the elastic element can be received within the wedge structure relative to the first and second rollers, offset from the line connecting their centers. Thus, the elastic element is always radially biased in one direction when compressed, preventing radial slippage and providing a stable and uniform compressive force to the first and second rollers on both sides.

[0036] In some embodiments, the rotatable device is a seat.

[0037] A second aspect of this disclosure relates to a seat assembly comprising a seat with a seat frame, characterized in that the seat assembly further comprises a rotation locking mechanism according to this disclosure, and the seat frame is capable of being secured to a clamping element of the rotation locking mechanism.

[0038] The disclosure relates to a means of transport including a seat assembly according to this disclosure. In this disclosure, the means of transport is not limited to vehicles but may also include other land transport vehicles, such as trains, or may be air or water transport vehicles. For example, for trains and air transport vehicles, business class passengers have a certain demand for swivel seats.

[0039] The technical features mentioned above, those to be mentioned below, and those shown individually in the accompanying drawings can be combined arbitrarily, provided that the combined technical features are not contradictory. All feasible combinations of features are the technical content explicitly described herein. Any one of the multiple sub-features contained in the same statement can be applied independently, without necessarily being applied together with other sub-features. Attached Figure Description

[0040] The present disclosure will be further described below with reference to the illustrative drawings and exemplary embodiments. Wherein:

[0041] Figure 1 A schematic perspective view showing an embodiment of the rotary locking mechanism according to the present disclosure is shown.

[0042] Figure 2 Show Figure 1 A schematic exploded view of the rotary locking mechanism, in which the drive motor is not shown.

[0043] Figure 3 Show Figure 1 Another schematic exploded view of the rotary locking mechanism, showing the drive motor.

[0044] Figure 4 Show Figure 1 A schematic cross-sectional view of a portion of the rotary locking mechanism.

[0045] Figure 5 Show Figure 1 Another schematic exploded view of the rotary locking mechanism, in which the drive motor is also shown and is shown in an exaggerated magnified manner.

[0046] Figure 6 Show Figure 5 A schematic structural diagram of the arrangement within the dashed box, wherein, Figure 6 The arrangement structure is in a locked state.

[0047] Figure 7 Show Figure 5 A schematic structural diagram of the arrangement within the dashed box, wherein, Figure 7 The arrangement structure is in the unlocked state and the drive disc can push the clamping parts.

[0048] Figure 8 A schematic structural diagram showing a portion of the rotary locking mechanism according to another embodiment of the present disclosure, relating to locking and unlocking.

[0049] Figure 9 A schematic structural diagram showing a portion of the rotary locking mechanism according to another embodiment of the present disclosure, relating to locking and unlocking.

[0050] Figure 10 A schematic structural diagram showing a portion of the rotary locking mechanism according to another embodiment of the present disclosure, relating to locking and unlocking.

[0051] Figure 11 A schematic structural diagram showing a portion of the rotary locking mechanism according to another embodiment of the present disclosure, relating to locking and unlocking.

[0052] Figure 12 A schematic structural diagram showing a portion of the rotary locking mechanism according to another embodiment of the present disclosure, relating to locking and unlocking.

[0053] Figure 13 Show Figure 1 A view showing the arrangement of the clamping element, brake ring, drive disc, and roller-elastic element assembly in the rotary locking mechanism, with detailed views of parts of this arrangement.

[0054] Figure 14 A schematic cross-sectional view is shown of the arrangement of a seat in a vehicle equipped with a rotary locking mechanism according to the present disclosure. Detailed Implementation

[0055] Firstly, by using Figures 1 to 7 The basic structure and operating principle of a rotary locking mechanism 100 according to an embodiment of the present disclosure are described.

[0056] like Figures 1 to 3 As shown, the rotary locking mechanism 100 according to this disclosure includes a housing 1, an external gear 2, a drive disc 4, a roller-elastic member assembly, a clamping member 7, a brake ring 8, and a cover plate 10. The housing 1 and the cover plate 10 are fixedly connected together, and the drive disc 4, roller-elastic member assembly, clamping member 7, and brake ring 8 are housed within an installation space defined by the housing 1 and the cover plate 10. This rotary locking mechanism 100 is configured to lock and unlock the rotational movement of a rotatable device, particularly a seat 200. The seat 200 can be a seat 200 for a transportation vehicle. Of course, the seat 200 can also be a seat 200 in other application scenarios. The seat 200 and the rotary locking mechanism 100 can constitute a seat assembly. The transportation vehicle 300 can be, for example, a motor vehicle, such as a passenger car. The transportation vehicle 300 can also be other land transportation vehicles, air transportation vehicles, or water transportation vehicles. For passenger cars, the transportation vehicle 300 of this disclosure can particularly be a mid-to-large SUV or MPV. Of course, the rotary locking mechanism 100 disclosed herein can be used not only in the transport vehicle 300, but also in other application areas where the rotary locking mechanism 100 is required.

[0057] To fix the cover plate 10 to the housing 1, a plurality of first bolts 11 are provided on the cover plate 10, and a plurality of first bolt holes are provided on the housing 1. The plurality of first bolt holes on the housing 1 are fitted into the plurality of first bolts 11 on the cover plate 10, and are fixed by nuts. In addition, a plurality of snap-fit ​​parts 1c are provided on the outer periphery of the housing 1, and a window part 10a corresponding to the snap-fit ​​parts 1c is provided on the outer periphery of the cover plate 10. The snap-fit ​​parts 1c can be snapped into the window part 10a, so that the housing 1 and the cover plate 10 are pre-assembled and fixed before being finally fixed by nuts.

[0058] The clamping member 7 is installed within the inner circumferential surface of the brake ring 8. Multiple second bolts 14 are provided on the clamping member 7, which can be used to connect rotatable devices, such as the seat frame of a seat.

[0059] A cavity is formed between the inner circumferential surface of the brake ring 8 and the outer circumferential surface of the clamping member 7. A roller-elastic member assembly is disposed within the cavity and includes a first roller 6a, a second roller 6b, and an elastic member 5. A drive protrusion 4b is provided on the drive disc 4, each corresponding to a roller-elastic member assembly. In this embodiment, each roller-elastic member assembly has two drive protrusions 4b, which extend axially and into the cavity. In this embodiment, the clamping member 7 includes a plurality of radially outwardly protruding first driven protrusions 7a on its outer circumference. A roller-elastic member assembly and two drive protrusions 4b are disposed between any two adjacent first driven protrusions 7a, with the roller-elastic member assembly positioned between the two corresponding drive protrusions 4b. A wedge-tightening structure is formed by the inner circumferential surface of the brake ring 8 and the outer circumferential surface of the clamping member 7. This wedge-tightening structure is configured to receive and wedge the first roller 6a and the second roller 6b in the roller-elastic member assembly. Here, the clamping member 7, the drive disc 4, the roller-elastic member assembly, and the brake ring 8 constitute the main functional components of the rotary locking mechanism. When the drive disc 4 is not rotating, the first roller 6a and the second roller 6b in the roller-elastic member assembly are wedge-tightened in the wedge-tightening structure, for example, at the wedge-tightening point, under the action of the elastic member 5, thereby locking the clamping member 7 relative to the brake ring 8, and thereby locking a rotatable device, such as a seat lock, that is fixed to the clamping member 7. When the drive disc 4 rotates, one of the two drive protrusions 4b of the drive disc 4 unlocks one of the rollers in the roller-elastic member assembly, while the other drive protrusion 4b drives the first driven protrusion 7a of the clamping member 7 to rotate. During this process, the other roller in the roller-elastic member assembly acts as a rotational support for the clamping member 7. That is, when the drive disc 4 drives the clamping disc to rotate, the clamping member 7 can rotate freely around the central axis within the brake ring 8 with one of the rollers as the rotational support. The locking and unlocking situations will be described in detail below.

[0060] To drive the drive disk 4 to rotate, a separate external gear component 2 is arranged on the drive disk 4. This external gear component 2 is hollow and includes a recessed mating portion 2a on its inner circumference. The drive disk 4 includes a protruding portion on one side, and a protruding mating portion 4a is provided on the outer circumference of this protruding portion to mate with the recessed mating portion 2a. The protruding portion of the drive disk 4 can be inserted into the hollow portion of the external gear component 2, thereby forming a form-locking mating structure between the recessed mating portion 2a and the protruding mating portion 4a. In another embodiment, a technical solution where the drive disk 4 and the external gear component 2 are integrally constructed is also conceivable. Furthermore, in another embodiment, an internal gear component with an internal gear is also conceivable. Figure 3 As can be seen, the rotary locking mechanism may further include a drive motor 12, which is mounted, for example, on a bracket portion integrally constructed on the housing 1 via a motor bolt 13, wherein the motor bolt 13 can pass through a first motor bolt hole 12b in the drive motor 12 and a second motor bolt hole 1b in the housing 1. To transmit the rotational motion of the drive motor 12 to the external gear 2, which is connected to the drive disc 4, the rotary locking mechanism may include a rack 3, one side of which is connected to the drive motor 12, and the other side is connected to the teeth of the external gear 2, wherein the other side can pass through a rack hole 1a in the housing 1 and a motor hole 12a in the motor. A mating tooth that interacts with the teeth on the other side of the external gear 2 may exist within the motor hole 12a. Here, the portion of the housing with the rack hole 1a and the portion with the second motor bolt hole 1b can jointly serve as a bracket portion for the drive motor 12.

[0061] The cover plate 10 can be fixed to the brake ring 8 by a first bolt 11 passing through the cover plate 10, and the cover plate 10 substantially covers the cavity. A spacer 9 is provided between the clamping member 7 and the roller-elastic member assembly and the cover plate 10, thereby providing a spacer 9 that... Figure 4 The upper end shown can isolate the cover plate, and the isolation gasket 9 is as follows: Figure 4 The lower end shown can isolate the clamping element and the roller in the roller-elastic element assembly to avoid abnormal noise caused by collision between metal parts and to reduce the frictional resistance of the metal parts during rotation.

[0062] exist Figure 4 The arrangement of the external gear 2, drive disc 4, one of the rollers in the roller-elastic assembly (such as the first roller 6a or the second roller 6b), clamping member 7, brake ring 8, isolation washer 9, and cover plate 10 relative to each other can be seen. Furthermore, the first bolt 11 and the second bolt 14 fixed to the clamping member 7 can also be seen.

[0063] The following uses Figures 5 to 7Describe the locking and unlocking states of the roller-elastic component assembly. For example... Figure 5 As shown, the rotation of the drive motor 12 drives the rack 3 to rotate, and the rack 3 meshes with the external gear, driving the external gear to rotate. Here, the external gear and the drive disk 4 are assembled to form a component, the drive disk 4 and the external gear rotate together, and the rotation of the external gear drives the rotation of the drive disk 4. When the drive motor 12 is not rotating, the roller-elastic component assembly can be in the following position: Figure 6 In the locked state shown, neither of the two drive protrusions 4b on the drive disc 4 is in contact with the first roller 6a and the second roller 6b. At this time, the elastic member 5 pushes the first roller 6a and the second roller 6b apart to both sides, thereby wedging the first roller 6a and the second roller 6b into the wedging structure formed between the brake ring 8 and the clamping member 7. When the drive motor 12 rotates, as... Figure 7 As shown, the drive disc 4 can rotate in one direction, such as clockwise, whereby one of the drive protrusions 4b contacts the first roller 6a, and under the further compression deformation of the elastic member 5, pushes the first roller 6a out of the wedging structure, thereby entering the... Figure 7 As shown in the unlocked state, at the same time, another drive protrusion 4b contacts and drives the clamping member 7. Figure 7 The first driven protrusion 7a on the right side allows the drive disk 4 to rotate together with the clamping member 7 when unlocked. Conversely, when along with... Figure 7 When rotating in the opposite direction, it can also achieve the same effect as... Figure 7 Similar unlocking and pushing effects are achieved, wherein the other driving protrusion 4b can contact the second roller 6b and push the second roller 6b to disengage from the wedging, while the one driving protrusion 4b can... Figure 7 The first driven protrusion 7a on the left side contacts and drives the first driven protrusion 7a. It is easy to understand here that the designations of the one driving protrusion 4b and the other driving protrusion 4b on the outer side are related to the steering direction. When the rotation direction changes, the designations of the two outer driving protrusions can be interchanged.

[0064] In addition, from Figure 6 and Figure 7 It can also be seen that the side of the driving protrusion 4b facing the first roller 6a or the second roller 6b has a recessed structure, and the shape of the recessed structure matches the shape of the first roller 6a or the second roller 6b, so that the driving protrusion 4b can fit against the first roller 6a or the second roller 6b when it contacts the first roller 6a or the second roller 6b. Furthermore, from... Figure 6 and Figure 7As can be seen from the diagram, the wedge-tightening structure has a deformation-accommodating portion in the middle region for accommodating the deformed elastic element 5. Here, in the wedge-tightening structure, this middle region is located between the wedge-tightening points of the rollers.

[0065] This disclosure previously exemplifies a technical solution involving two drive protrusions for a roller-elastic member assembly, but other embodiments are not excluded. For example, in one embodiment, a technical solution involving four drive protrusions for a roller-elastic member assembly may be provided. These four drive protrusions may be, for example, first, second, third, and fourth drive protrusions, wherein these four drive protrusions and a roller-elastic member assembly are located between two first driven protrusions, the first and second drive protrusions are located on one side of the roller-elastic member assembly, and the third and fourth drive protrusions are located on the other side of the roller-elastic member assembly, respectively. When the drive disc rotates in one direction, for example, the second drive protrusion may contact and push the first roller to disengage it from the wedging, while the fourth drive protrusion pushes one of the first driven protrusions; when the drive disc rotates in the opposite direction, for example, the third drive protrusion may contact and push the second roller to disengage it from the wedging, while the first drive protrusion pushes another first driven protrusion.

[0066] Furthermore, in another embodiment, it is conceivable that, such as Figure 8 Between any two adjacent first driven protrusions 7a, an additional roller-elastic element assembly can be provided adjacent to the first driven protrusion 7a. The additional roller-elastic element assembly includes a third roller 6c and an additional elastic element 5'. The additional elastic element 5' is disposed between the corresponding first driven protrusion 7a and the third roller 6c. Furthermore, an additional wedge structure is formed between the inner circumferential surface of the brake ring 8 and the outer circumferential surface of the clamping member 7. This additional wedge structure is configured to receive the additional roller-elastic element assembly and wedge the third roller 6c in the additional roller-elastic element assembly. When the drive disc rotates, the other driving protrusion 4b can push the third roller 6c, causing the third roller 6c to be pressed against the additional elastic element 5' and disengaged from the additional wedge structure. Thus, the other driving protrusion 4b drives the first driven protrusion 7a to move via the third roller 6c and the additional elastic element 5'. In this configuration, the other driving protrusion 4b can indirectly drive the first driven protrusion 7a to move when the drive disc rotates. See also the description of the preceding embodiments for further details.

[0067] Furthermore, in other embodiments, it is conceivable that more than one roller-elastic element assembly and corresponding multiple drive protrusions may be provided. For example, in Figure 9In the illustrated embodiment, the clamping member 7 includes a plurality of radially outwardly protruding first driven protrusions 7a on its outer periphery. Two roller-elastic element assemblies and three driving protrusions are disposed between any two adjacent first driven protrusions 7a, wherein the roller-elastic element assemblies and driving protrusions are alternately arranged. In this embodiment, the wedge structure, the roller-elastic element assembly, and the driving protrusions are configured such that when the drive disc rotates, for example, in one direction such as clockwise, a corresponding driving protrusion (in that rotational direction) Figure 9 The outer left drive protrusion 4b and the middle drive protrusion 4b can contact and push one of the first roller 6a and the second roller 6b of the corresponding roller-elastic member assembly (in this rotation direction). Figure 9 The corresponding first roller 6a), thus one of the first roller 6a and the second roller 6b is pressed against the elastic member 5 and disengaged from the wedging structure, while the other roller (in this rotational direction) Figure 9 The corresponding second roller 6b serves as a rotational support for the clamping member 7. Furthermore, in this embodiment, a pushing step 74 is provided on the outer peripheral surface of the clamping member 7 between the two roller-elastic member assemblies. The pushing step 74, the roller-elastic member assembly, and the driving protrusion 4b are configured such that after one of the first rollers 6a and 6b is pressed against the elastic member 5 and disengaged from the wedging structure, the other roller is pressed against the pushing step 74 via the elastic member 5. This allows the corresponding driving protrusion (in this embodiment, the middle driving protrusion 4b) to drive the pushing step 74 via the roller-elastic member assembly. It is understood that the operation is similar when rotating in the opposite direction. See the description of the previous embodiment for other aspects.

[0068] Furthermore, in other embodiments, such as Figure 10 As shown, in the wedge-tightening structure, the inner circumferential surface of the brake ring 8 is arc-shaped, and an additional pushing step 75 is provided on the outer circumferential surface of the clamping member 7. The elastic body 5 is arranged between the additional pushing step 75 and the inner circumferential surface of the brake ring 8. The additional pushing step 75, the roller-elastic member assembly, and the driving protrusion 4b are configured such that one of the first roller 6a and the second roller 6b, after being pressed against the elastic member and disengaged from the wedge-tightening structure, contacts the additional pushing step 75, thereby enabling the driving protrusion 4b to drive the additional pushing step 75 via the one roller. See the description of the previous embodiment for other aspects.

[0069] Between the two first driven protrusions 7a, in addition to the aforementioned number of drive protrusions 4b and roller-elastic member assemblies, other numbers of drive protrusions 4b and roller-elastic member assemblies may also be conceived.

[0070] In the above embodiments, the arrangement of the drive protrusion 4b and the roller-elastic member assembly between the two first driven protrusions 7a is mainly described. The pushing action on the clamping member 7 is primarily achieved by the drive protrusion 4b pushing the first driven protrusion 7a. This arrangement of the first driven protrusion 7a allows the drive protrusion 4b to directly push the first driven protrusion 7a. Of course, a better locking effect can also be achieved with indirect pushing. In the case of the first driven protrusion 7a, a trade-off can be made between the drive protrusion 4b directly pushing the first driven protrusion 7a and the better locking effect caused by indirect pushing.

[0071] Next, using Figure 11 and Figure 12 The description describes a technical solution that replaces the first driven protrusion 7a with a second driven protrusion 7b and a third driven protrusion 7c. In these two solutions, the pushing action on the clamping member 7 is mainly achieved by driving the protrusion 4b to push the second driven protrusion 7b or the third driven protrusion 7c. Figure 11 As shown, in an embodiment with a second driven protrusion 7b, the clamping member 7 includes a plurality of radially outwardly protruding second driven protrusions 7b on its outer periphery. A driving protrusion 4b is disposed between the second driven protrusions 7b and the inner circumferential surface of the brake ring 8. A driving protrusion 4b and a corresponding second driven protrusion 7b are respectively provided on both sides of a roller-elastic member assembly. The second driven protrusion 7b, the roller-elastic member assembly, and the driving protrusion 4b are configured such that after one of the first rollers 6a and 6b is pressed against the elastic member 5 and disengaged from the wedging structure, the other roller is pressed against the second driven protrusion 7b via the elastic member 5, thereby enabling the driving protrusion 4b to drive the second driven protrusion 7b to move via the roller-elastic member assembly. Figure 12As shown, in an embodiment with a third driven protrusion 7c, the clamping member 7 includes a plurality of radially outwardly protruding third driven protrusions 7c on its outer periphery. The third driven protrusions 7c are located within a wedge-tightening structure. An elastic member 5 is arranged between the third driven protrusions 7c and the inner circumferential surface of the brake ring 8. Driving protrusions 4b are respectively provided on both sides of a roller-elastic member assembly. The third driven protrusions 7c, the roller-elastic member assembly, and the driving protrusions 4b are configured such that one of the first rollers 6a and 6b, after being pressed against the elastic member 5 and disengaged from the wedge-tightening structure, contacts the third driven protrusion 7c, thereby enabling the driving protrusion 4b to drive the third driven protrusion 7c via the roller. Figure 11 and Figure 12 In the two embodiments shown, the driving protrusion 4b can also be driven in two directions, thereby driving the corresponding second driven protrusion 7b and third driven protrusion 7c to move. Here, except for the different arrangement of the second driven protrusion 7b and third driven protrusion 7c, as well as the corresponding driving protrusion 4b and elastic member 5, the locking and unlocking principles, the variation of the wedge-tightening structure, and other components in the rotary locking mechanism are basically the same as in the previous embodiments, so the description of the previous embodiments can be referred to.

[0072] In the two embodiments described above, the same number of roller-elastic element assemblies and drive protrusions 4b are provided, and the roller-elastic element assemblies and drive protrusions 4b are alternately arranged. Of course, it is also conceivable to provide other numbers of drive protrusions 4b. For example, in an embodiment not shown, two or more drive protrusions 4b may be provided between two roller-elastic element assemblies.

[0073] It should be noted that, in this disclosure, the structures presented in the corresponding figures for clarity are schematic, showing the second driven protrusion 7b, the third driven protrusion 7c, the preceding pushing step 74, and the additional pushing step 75. Other forms of protruding structures projecting from the outer peripheral surface of the clamping member 7 are conceivable. Here, such a protruding structure could be one that extends outward from a circular base structure.

[0074] Then, with the help of Figure 13 Describe the relative positional relationship between the drive protrusion 4b of the drive disc 4 and the brake ring 8. For example... Figure 13As shown, in order to avoid or reduce the driving resistance, the top end of the first driven protrusion 7a of the clamping member 7 is radially spaced apart from the inner circumferential surface of the brake ring 8 by a first distance h1, and the top end of the driving protrusion 4b of the driving disk 4 is radially spaced apart from the inner circumferential surface of the brake ring 8 by a second distance h2. Thus, when the driving disk 4 drives the clamping member 7 to rotate, the first driven protrusion 7a of the clamping member 7 and the brake ring 8 are in a non-contact state in the radial direction, and the driving protrusion 4b of the driving disk 4 and the brake ring 8 are also in a non-contact state in the radial direction.

[0075] In this disclosure, the elastic element 5 can be a spring, such as a metal compression spring, or it can be an elastomeric element made of silicone or rubber. Furthermore, in this disclosure, the rotary locking mechanism may be free of welded structures, thereby reducing the heat output from welding to the brake ring 8, clamping element 7, and roller contact surfaces.

[0076] In this disclosure, in addition to seats, the rotary locking mechanism can also be used for locking and unlocking other devices that require rotation, as well as the corresponding rotation. Furthermore, while the operation of each component when rotating in one direction, such as clockwise, has been mainly described above, it can be understood that when rotating in the opposite direction, such as counterclockwise, each component can operate in a similar direction.

[0077] Finally, by using Figure 14 An exemplary arrangement and operation of a seat 200 equipped with the rotary locking mechanism 100 of this disclosure in a vehicle 300 is described. For example... Figure 14 As shown, the rotary locking mechanism 100 of this disclosure can be disposed below the seat 200 and thereby form a seat assembly with the seat 200. The seat 200 can be, for example, a second-row seat 200 configured as a large MPV or large SUV in a vehicle 300, such as a zero-gravity seat.

[0078] It should be noted that the terminology used herein is for illustrative purposes only and is not intended to limit the disclosure. The singular forms “a” and “the one” as used herein should include the plural forms unless the context explicitly states otherwise. It is understood that the terms “comprising” and “including,” and other similar terms, when used in the application documents, specifically describe the presence of the stated operation, element, and / or component, without excluding the presence or addition of one or more other operations, elements, components, and / or combinations thereof. The term “and / or” as used herein includes all arbitrary combinations of one or more of the associated listed items. In the description of the drawings, similar reference numerals always denote similar elements.

[0079] The thickness of the elements in the accompanying drawings may be exaggerated for clarity. It is also understood that if an element is described as being on, coupled to, or connected to another element, then the element may be directly formed on, coupled to, or connected to the other element, or there may be one or more intermediate elements between them. Conversely, if the expressions "directly on," "directly coupled to," and "directly connected to" are used herein, it indicates that there is no intermediate element. Other terms used to describe relationships between elements should be interpreted similarly, such as "between" and "directly between," "attached" and "directly attached," "adjacent" and "directly adjacent," etc.

[0080] Terms such as “top,” “bottom,” “above,” “below,” “over,” “under,” etc., are used to describe the relationship of one element, layer, or region relative to another element, layer, or region, as shown in the accompanying drawings. It is understood that these terms should also encompass other orientations of the device in addition to those described in the accompanying drawings.

[0081] It is understood that although the terms "first," "second," etc., may be used herein to describe different elements, these elements should not be limited by these terms. These terms are merely used to distinguish one element from another. Thus, a first element may be referred to as a second element without departing from the teachings of this disclosure.

[0082] It can also be considered that all the exemplary embodiments disclosed herein can be arbitrarily combined with each other. Furthermore, all individual technical features in this application can be arbitrarily combined with each other, as long as the combined technical features are not contradictory. All technically feasible combinations of features are the technical content described in this application.

[0083] Finally, it should be noted that the above embodiments are merely for understanding this disclosure and do not constitute a limitation on the scope of protection of this disclosure. Those skilled in the art can make modifications based on the above embodiments, and these modifications will not depart from the scope of protection of this disclosure.

Claims

1. A rotary locking mechanism configured to lock and unlock the rotational movement of a rotatable device, the rotary locking mechanism comprising: A cavity is formed between the inner circumferential surface of the brake ring and the outer circumferential surface of the clamping member; Multiple roller-elastic element assemblies are disposed within the cavity and include a first roller, a second roller, and an elastic element; A drive disk has drive protrusions that mate with the roller-elastic element assembly, the drive protrusions extending axially and into the cavity. Its features are, The elastic element in the roller-elastic element assembly is disposed between the first roller and the second roller and simultaneously contacts the first roller and the second roller, respectively; A wedge-tightening structure is formed by the inner circumferential surface of the brake ring and the outer circumferential surface of the clamping member. This wedge-tightening structure is configured to receive and tighten the first and second rollers in the roller-elastic member assembly. The wedge-locking structure and the roller-elastic element assembly are configured such that the roller-elastic element assembly can be disposed within the mating wedge-locking structure, and when the drive disc is not rotating, the elastic element in the roller-elastic element assembly presses the first roller and the second roller to both sides respectively, so that the first roller and the second roller are wedge-locked in the wedge-locking structure, thereby locking the rotation locking mechanism. The wedge structure, the roller-elastic element assembly, and the drive protrusion are configured such that, when the drive disc rotates, a corresponding drive protrusion can contact and push one of the first and second rollers of the corresponding roller-elastic element assembly, thereby pressing one of the first and second rollers against the elastic element and disengaging from the wedge structure, while the other roller serves as a rotational support for the clamping element.

2. The rotary locking mechanism according to claim 1, characterized in that, The clamping member includes a plurality of radially outwardly protruding first driven protrusions on its outer periphery, and n roller-elastic member assemblies and n+1 driving protrusions are arranged between any two adjacent first driven protrusions.

3. The rotary locking mechanism according to claim 2, characterized in that, n is 1, and the roller-elastic component assembly is arranged between two mating drive protrusions, or n is greater than or equal to 2, and the roller-elastic component assembly and the drive protrusion are alternately arranged.

4. The rotary locking mechanism according to claim 3, characterized in that, The driving protrusion and the first driven protrusion are configured such that when the drive disc rotates, the other driving protrusion in the driving protrusion can drive the first driven protrusion to move.

5. The rotary locking mechanism according to claim 4, characterized in that, The other driving protrusion can directly contact the first driven protrusion when the driving disk rotates, thereby directly driving the first driven protrusion to move.

6. The rotary locking mechanism according to claim 5, characterized in that, The driving protrusion and the first driven protrusion are configured such that when the drive disc rotates and one of the driving protrusions causes the roller to disengage from the wedging structure, the other driving protrusion in the driving protrusion can simultaneously or subsequently contact the first driven protrusion and drive the first driven protrusion to move.

7. The rotary locking mechanism according to claim 4, characterized in that, The other driving protrusion can indirectly drive the first driven protrusion to move when the drive disc rotates.

8. The rotary locking mechanism according to claim 7, characterized in that, Between any two adjacent first driven protrusions, a further roller-elastic element assembly is provided adjacent to each first driven protrusion. This further roller-elastic element assembly includes a third roller and a further elastic element, which is disposed between the corresponding first driven protrusion and the third roller. Additionally, a further wedging structure is formed between the inner circumferential surface of the brake ring and the outer circumferential surface of the clamping member. This further wedging structure is configured to receive the further roller-elastic element assembly and wedge the third roller within the further roller-elastic element assembly. When the drive disc rotates, the other drive protrusion can push the third roller, causing the third roller to be pressed against the other elastic element and disengaged from the other wedge structure. Thus, the other drive protrusion drives the first driven protrusion to move via the third roller and the other elastic element.

9. The rotary locking mechanism according to claim 1, characterized in that, The clamping member includes multiple radially outwardly protruding second driven protrusions on its outer periphery. A driving protrusion is disposed between the second driven protrusion and the inner circumferential surface of the brake ring. Furthermore, a driving protrusion and a corresponding second driven protrusion are respectively provided on both sides of a roller-elastic member assembly. The second driven protrusion, the roller-elastic member assembly, and the drive protrusion are configured such that after one of the first rollers and the second roller is pressed against the elastic member and disengaged from the wedging structure, the other roller is pressed against the second driven protrusion via the elastic member, thereby enabling the drive protrusion to move the second driven protrusion via the roller-elastic member assembly.

10. The rotary locking mechanism according to claim 1, characterized in that, The clamping member includes multiple radially outwardly protruding third driven protrusions on its outer periphery. These third driven protrusions are located within a wedge-tightening structure. An elastic element is arranged between the third driven protrusions and the inner circumferential surface of the brake ring. Furthermore, driving protrusions are provided on both sides of a roller-elastic element assembly. The third driven protrusion, the roller-elastic member assembly, and the driving protrusion are configured such that one of the first roller and the second roller, after being pressed against the elastic member and disengaged from the wedging structure, contacts the third driven protrusion, thereby enabling the driving protrusion to move the third driven protrusion via the one roller.

11. The rotary locking mechanism according to claim 9 or 10, characterized in that, The roller-elastic component assemblies and drive protrusions are provided in the same number, and the roller-elastic component assemblies and drive protrusions are arranged alternately.

12. The rotary locking mechanism according to any one of claims 1 to 8, characterized in that, The top end of the first driven protrusion of the clamping member is radially spaced from the inner circumferential surface of the brake ring.

13. The rotary locking mechanism according to any one of claims 4 to 8, characterized in that, When n is greater than or equal to 2, a pushing step is provided on the outer circumferential surface of the clamping member between at least two roller-elastic component assemblies, wherein, The push step, the roller-elastic member assembly, and the drive protrusion are configured such that after one of the first and second rollers is pressed against the elastic member and disengaged from the wedging structure, the other roller is pressed against the push step via the elastic member, thereby enabling the drive protrusion to move the push step via the roller-elastic member assembly.

14. The rotary locking mechanism according to any one of claims 4 to 8, characterized in that, In the wedge-clamping structure, the inner circumferential surface of the brake ring is arc-shaped, and an additional pushing step is provided on the outer circumferential surface of the clamping member. The elastic element in the roller-elastic element assembly is arranged between the additional pushing step and the inner circumferential surface of the brake ring. The additional push step, the roller-elastic member assembly, and the drive protrusion are configured such that one of the first and second rollers, after being pressed against the elastic member and disengaged from the wedging structure, contacts the additional push step, thereby enabling the drive protrusion to move the additional push step via the one roller.

15. The rotary locking mechanism according to any one of claims 1 to 10, characterized in that, The side of the drive protrusion facing the first roller or the second roller has a recessed structure and the shape of the recessed structure matches the shape of the first roller or the second roller, so that the drive protrusion can fit against the first roller or the second roller when it comes into contact with the first roller or the second roller.

16. The rotary locking mechanism according to any one of claims 1 to 10, characterized in that, The top of the drive protrusion of the drive disc is radially spaced from the inner circumferential surface of the brake ring.

17. The rotary locking mechanism according to any one of claims 1 to 10, characterized in that, The elastic element is a spring or an elastic element made of an elastic body.

18. The rotary locking mechanism according to claim 8, characterized in that, The other elastic element is a spring or an elastic element made of an elastomer.

19. The rotary locking mechanism according to any one of claims 1 to 10, characterized in that, The rotary locking mechanism is equipped with a drive motor that can drive the drive disk to rotate. The rotary locking mechanism also includes a housing, on which a bracket for mounting the drive motor is integrally constructed.

20. The rotary locking mechanism according to any one of claims 1 to 10, characterized in that, The rotary locking mechanism also includes a separate gear component that can be fixedly mounted on the drive disk, thereby enabling the drive disk to rotate via gear transmission.

21. The rotary locking mechanism according to claim 20, characterized in that, The gear component is hollow and has external teeth. The gear component includes a recessed mating portion recessed on its inner circumference, while the drive disk includes a protruding portion protruding on one side. A protruding mating portion that mates with the recessed mating portion is provided on the outer circumference of the protruding portion. The protruding portion of the drive disk can be inserted into the hollow portion of the gear component, thereby forming a form-locking mating structure between the recessed mating portion and the protruding mating portion.

22. The rotary locking mechanism according to any one of claims 1 to 10, characterized in that, The rotary locking mechanism includes a housing with a latching portion and a cover plate with a window portion corresponding to the latching portion. The latching portion can be engaged in the window portion to connect the housing and the cover plate.

23. The rotary locking mechanism according to any one of claims 1 to 10, characterized in that, The rotary locking mechanism includes a cover plate that can be fixedly arranged on the brake ring and at least partially covers the cavity. An isolation gasket is provided between the clamping member and / or the roller-elastic member assembly and the cover plate. The isolation gasket is configured to reduce noise generated by the movement of the clamping member and / or the roller-elastic member assembly and / or to reduce the frictional resistance of the clamping member and / or the roller-elastic member assembly during movement.

24. The rotary locking mechanism according to any one of claims 1 to 10, characterized in that, The number of the plurality of roller-elastic element assemblies is selected such that the plurality of roller-elastic element assemblies can lock the rotatable device carried by the clamping member of the rotary locking mechanism.

25. The rotary locking mechanism according to any one of claims 1 to 10, characterized in that, The wedge structure has a deformation-accommodating portion in the middle region for accommodating the deformed elastic element.

26. The rotary locking mechanism according to any one of claims 1 to 10, characterized in that, The contour of the wedge structure is configured such that the elastic element can be received in the wedge structure relative to the first roller and the second roller, even if it is off the line connecting the centers of the first roller and the second roller.

27. The rotary locking mechanism according to any one of claims 1 to 10, characterized in that, The rotatable device is a seat.

28. A seat assembly comprising a seat with a seat frame, characterized in that, The seat assembly further includes a rotation locking mechanism according to any one of claims 1 to 27, and the seat frame is capable of being fixed to the clamping member of the rotation locking mechanism.

29. A means of transport, characterized in that, The means of transport includes the seat assembly according to claim 28.

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