Mechanism for realizing synchronous locking and movement device

Abstract

The utility model provides a mechanism for realizing synchronous locking and a movement device. The mechanism comprises a driving piece, a mounting seat and at least two locking pieces, at least two moving parts are movably arranged on the mounting seat, the driving part is also movably arranged on the mounting seat and is in transmission connection with the locking parts, and the locking parts are respectively adjacent to the moving parts. When the driving part moves relative to the mounting seat, all the locking parts can be driven to synchronously move towards the moving parts, so that all the moving parts are synchronously locked; on the contrary, the driving piece moves reversely, the locking piece is synchronously far away from the moving piece, and synchronous unlocking is achieved. According to the mechanism, due to the fact that the number of moving parts is large, movement is more complex, and through the unique design, cooperative work of the multiple locking parts is ingeniously achieved through the driving part; according to the movement device, the movement device of the double-four-bar mechanism is formed by the components of the movement device and the mechanisms, the locking mechanism is applied to the complex double-four-bar mechanism, and the movement device can be integrally and rapidly locked at a time.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of furniture, especially a mechanism and motion device realizing synchronous locking. BACKGROUND

[0002] In the development of furniture, functionality and comfort are increasingly valued, and the position of furniture in mechanical transmission is gradually highlighted. In adjustable furniture, multiple moving parts often need to be effectively locked and unlocked. The traditional locking method has many drawbacks and cannot meet the growing demand for efficient and accurate control.

[0003] In existing adjustable furniture, each movable part basically needs a separate switch for control. In some complex mechanisms, multiple locking pieces are used to lock multiple moving parts in sequence. This method is not only time-consuming and labor-intensive, but also inefficient, complex and costly.

[0004] In addition, the traditional locking mechanism is complex in structure and has many parts, which not only increases the manufacturing cost, but also makes maintenance and repair more difficult. Once a part fails, the maintenance personnel need to spend a lot of time troubleshooting and replacing, further affecting normal use.

[0005] Therefore, there is an urgent need in the market for a mechanism that can achieve synchronous locking and unlocking of multiple moving parts. SUMMARY

[0006] To solve the above technical problems, the utility model provides a mechanism for realizing synchronous locking, comprising a driving piece, a mounting seat and at least two locking pieces. At least two moving parts are movably arranged on the mounting seat, the driving piece is movably arranged on the mounting seat and is in transmission connection with each locking piece, and the locking pieces are respectively adjacent to the moving parts. When the driving piece moves relative to the mounting seat, it can drive all the locking pieces to move synchronously towards the moving parts, thereby synchronously locking all the moving parts. Conversely, when the driving piece moves in the opposite direction, the locking pieces move away from the moving parts, achieving synchronous unlocking. This mechanism has a large number of moving parts and more complex movements, but through unique design, it cleverly realizes the cooperative work of multiple locking pieces with the driving piece. It is efficient, easy to operate and simple in structure, and can quickly lock the entire mechanism according to demand, and can be widely used in various scenes requiring synchronous locking control of multiple parts.

[0007] Further provided is a motion device comprising a base, a first connecting rod, a first moving part, a second connecting rod, a second moving part, a transmission piece and the above-mentioned mechanism, which constitutes a double four-bar linkage mechanism. The above-mentioned locking mechanism is applied to a complex double four-bar linkage mechanism and can lock the entire motion device at once and quickly.

[0008] The technical solution of the utility model is as follows:

[0009] The mechanism for realizing synchronous locking comprises a driving member, a mounting base, and at least two locking members, the mounting base is movably provided with at least two moving members, the driving member is movably arranged on the mounting base, and the driving member and the locking members are in transmission connection, and the locking members are respectively located on the sides of the moving members; the driving member is configured to drive all the locking members to move towards the locking members or move away from the locking members synchronously when the driving member moves relative to the mounting base, and when the locking members all move towards the moving members, all the moving members are synchronously locked, and when the locking members all move away from the moving members, all the moving members are synchronously unlocked.

[0010] Firstly, the mounting base is provided with at least two moving members, so that the mechanism as a whole is a non-single motion mechanism, and the motion thereof is more complex; at this time, for the plurality of moving members, a plurality of locking members are required to lock; in the scheme, the plurality of locking members can simultaneously lock the respective adjacent moving members driven by the driving member, the locking efficiency is high, the locking is convenient, the structure is simple, the locking of the mechanism as a whole can be quickly realized according to the requirement, and the application scenarios are more.

[0011] As a preferred, the two moving members are respectively rotationally connected at the two end portions of the mounting base, and the driving member is rotationally arranged on the mounting base; the locking members are slidingly arranged between the moving members and the mounting base, the two locking members are respectively in transmission connection at the two end portions of the driving member, and the directions of the two locking members are opposite. When the driving member rotates once, the two locking members can simultaneously move, and in the case that the locking members have the same locking mode, such as the meshing locking of the plane meshing teeth, the locking members need to slide in different directions towards the opposite directions to synchronously lock or unlock; of course, the driving member can also be slidingly arranged on the mounting base, at this time, the locking members can be arranged on the same side of the driving member, which can be changed according to the specific use scene, and in the rotation, the movement of the driving member can be kept smooth, the effect of driving locking and unlocking is better, and it is more conducive to application in some complex scenes.

[0012] As a preferred, the two end portions of the driving member are respectively provided with two protrusions, and the directions of the two protrusions are opposite; a waist-shaped groove is formed in the protrusion, and a transmission column is protruded on the locking member and is inserted into the waist-shaped groove. The driving member and the locking member are in transmission connection through the waist-shaped groove and the transmission column, and in the case that the posture of the driving member is changed after the movement, the transmission column can still remain in the waist-shaped groove to prevent interference.

[0013] As a preferred, the driving member is in a strip shape.

[0014] As a preferred, the moving member is rotationally connected with the mounting base through a rotating shaft, and the locking member is slidingly arranged on the rotating shaft.

[0015] Preferably, the moving part and the locking part are provided with planar engagement teeth, which are evenly distributed on the moving part and the locking part in the circumferential direction.

[0016] Preferably, a locking spring is arranged between any locking part and the mounting base, and the locking spring is configured to give the locking part an elastic force towards the moving part. The locking part is arranged on the rotating shaft, so that the locking spring can be sleeved on the rotating shaft to give the locking part an elastic force towards the moving part. The locking spring has the advantage of keeping the locking in the unoperated state.

[0017] Preferably, the mechanism further comprises an operating part, which is slidingly arranged on any moving part and is configured to be in transmission connection with the driving part. When operating, the user holds the moving part with the operating part to unlock, and then adjusts, and then locks after the adjustment is completed, so that the operation is simple and convenient.

[0018] The mechanism is applied to a complex double four-bar linkage mechanism, and can lock the whole motion device at one time and quickly.

[0019] The mechanism is applied to a complex double four-bar linkage mechanism, and can lock the whole motion device at one time and quickly.

[0020] The design starting point, concept and beneficial effects of the utility model are as follows:

[0021] In the locking mechanism, at least two moving parts are first provided on the mounting base. Therefore, the mechanism as a whole is not a single-movement mechanism when it moves. Its movement should be more complex. At this time, multiple locking parts are required to lock the multiple moving parts. In this solution, through the drive of the driving part, multiple locking parts can lock their adjacent moving parts at the same time. The locking efficiency is high, the locking is convenient, and the structure is simple. It can quickly realize the locking of the entire mechanism according to the requirements and has a wide range of application scenarios.

[0022] In the motion device, a double four-bar linkage is formed by the base, the first connecting rod, the first moving member, the second connecting rod, the second moving member, the transmission member, and the aforementioned mechanism. The locking mechanism described above is applied to a complex double four-bar linkage and can lock the entire motion device in one go and quickly. Specifically, the base, the first connecting rod, the first moving member, and the transmission member form a four-bar linkage, and the transmission member, the second connecting rod, the second moving member, and the mounting base form a four-bar linkage. When these two four-bar linkages are locked, the whole device forms a larger four-bar linkage-like mechanism. The locking mechanism can simultaneously lock these three movable four-bar linkages and similar linkages, allowing the entire device to be locked and unlocked, resulting in higher locking efficiency. Attached Figure Description

[0023] Figure 1 The present invention provides a three-dimensional structural schematic diagram of the headrest of the first and second four-bar linkage mechanisms in the embodiments.

[0024] Figure 2 In the embodiments of this utility model, the headrest is relative to Figure 1 Schematic diagram of the three-dimensional structure after movement Figure 1 ;

[0025] Figure 3 In the embodiments of this utility model, the headrest is relative to Figure 1 Schematic diagram of the three-dimensional structure after movement Figure 2 ;

[0026] Figure 4 This is a three-dimensional structural diagram of the synchronous locking mechanism being installed on the motion device in an embodiment of the present invention;

[0027] Figure 5 The present invention provides a side view of the headrest of the third linkage mechanism in the embodiments.

[0028] Figure 6 This is a three-dimensional structural diagram of the locking member and locking part in the embodiments of this utility model;

[0029] Figure 7 This is a three-dimensional structural diagram of the first locking member in an embodiment of the present invention;

[0030] Figure 8 This is a three-dimensional structural diagram of the transmission component in an embodiment of the present invention;

[0031] Figure 9 This is a three-dimensional structural diagram of the base in an embodiment of the present invention;

[0032] Figure 10 This is a three-dimensional structural diagram of the second moving part and the pillow frame in the embodiment of the present invention;

[0033] Figure 11 This is a bottom view of the transmission connection between the driving component and the operating component in an embodiment of the present invention;

[0034] Figure 12 This is a three-dimensional structural diagram of the transmission connection between the driving component and the operating component in the embodiment of this utility model;

[0035] Figure 13 This is a schematic diagram showing the application state of the headrest in an embodiment of the present invention.

[0036] The reference numerals in the attached drawings are as follows: base 1; mounting groove 101; arc surface 102; second moving component, headrest frame 2; receiving groove 201; protrusion 202; support arm 21; window 22; first connecting rod 3; first moving component, passive connecting rod 4; second connecting rod 5; mounting seat, locking connecting rod 6; transmission component 9; first rotation point 91; clearance groove 90; first locking part 10; second locking part 11; first locking element 12; first transmission column 121; second locking element 13; second transmission column 131; operating component 14; slide groove 141; first connecting part 142; first arc surface 143; side wall 144; driving component 15; first waist-shaped groove 151; second waist-shaped groove 152; second connecting part 153; second arc surface 154; transmission part 155; planar meshing tooth 16; headrest frame 17; lever block 18. Detailed Implementation

[0037] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0038] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0039] In the description of this utility model, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0040] The specific implementation of this utility model is as follows:

[0041] like Figures 1-4 As shown, this utility model provides a mechanism for achieving synchronous locking. This mechanism is applied in a motion device, which includes a base 1, a second moving member 2, and the synchronous locking mechanism. It also includes a first linkage group, a second linkage group, and a transmission member 9. The two ends of the first linkage group are rotatably connected to the base 1 and the transmission member 9 respectively, forming a first four-bar linkage. The two ends of the second linkage group are rotatably connected to the second moving member 2 and the transmission member 9 respectively, forming a second four-bar linkage, enabling the second moving member 2 to move relative to the base 1 in at least two directions.

[0042] The synchronous locking mechanism includes a control component, a first locking element 12, a second locking element 13, and a mounting base that can function as a linkage. The control component includes an operating element 14 and a driving element 15. The operating element 14 is movably mounted on the second moving element 2 or the base 1, and the operating element 14 is drive-connected to the driving element 15. The first linkage group or the second linkage group includes a locking linkage 6, and the other linkage group has a passive linkage 4. The driving element 15 is movably mounted on the locking linkage 6, and the locking linkage 6 and the passive linkage 4 are rotatably mounted on the transmission element 9 via the same rotating shaft (not shown). Both the first locking element 12 and the second locking element 13 are linked with the driving element 15. The passive linkage 4 is provided with a first locking part 10, and the first locking element 12 is located beside the first locking part 10. The first locking element 12 is configured to selectively engage with the first locking part 10 to lock as the control component moves. When the first locking element 12 engages with the second locking part 11 to lock, the first four-bar linkage and the second four-bar linkage are locked.

[0043] When the first four-bar linkage is locked to the second four-bar linkage, the base 1, the first linkage assembly, the second linkage assembly, the transmission component 9, and the second moving component 2 form the third linkage. The second moving component 2 or the base 1 is provided with a second locking part 11, and the second locking member 13 is located beside the second locking part 11. The second locking member 13 is configured to selectively cooperate with the second locking part 11 to lock as the control component moves. When the second locking member 13 cooperates with the second locking part 11 to lock, the third linkage is locked, and the second moving component 2 and the base 1 remain stationary.

[0044] The first and second four-bar linkages are both four-bar linkages, while the third linkage is a quasi-four-bar linkage. When the motion device is unlocked, the first and second four-bar linkages enable the second moving part 2 to move in multiple directions relative to the base 1, and it can switch positions within at least one plane, thereby achieving the adjustment function. When the second moving part 2 is in motion, the first and second four-bar linkages together form a double four-bar linkage. Compared to existing technologies, this motion device has better adjustment capabilities, mainly reflected in the greater mobility and flexibility of the second moving part 2, better meeting the user's multi-purpose needs and being more ergonomic.

[0045] In addition, the locking mechanism has a simple structure and is ingeniously implemented:

[0046] Locking link 6 and driven link 4 are rotatably mounted on transmission component 9 via the same rotation axis. This means the first and second link groups share a common rotation point on transmission component 9 (the first rotation point 91), which is also the rotation point of locking link 6 and driven link 4 on transmission component 9. All three are rotatably connected at this point. At this common rotation point, locking link 6, driven link 4, and transmission component 9 all rotate around the same axis. The first locking part 10 and the first locking element 12 are located at this point, enabling simultaneous locking and unlocking of both the first and second link mechanisms.

[0047] Specifically, the driving member 15 is mounted on the locking link 6, and the driving member 15 is linked with the first locking member 12. When the first locking member 12 locks with the first locking part 10 on the passive link 4, the passive link 4 and the driving member 15 are also locked. Similarly, the passive link 4 and the locking link 6 are also locked, and the passive link 4 and the locking link 6 cannot rotate relative to the transmission member 9. Since both the first four-bar linkage and the second four-bar linkage are four-bar linkages, both the first four-bar linkage and the second four-bar linkage are locked.

[0048] The third linkage mechanism is a four-bar linkage. After the first four-bar linkage mechanism and the second four-bar linkage mechanism are locked, the locking link 6 and the passive link 4 are equivalent to the same link. Although the mechanism formed by the first link group and the second link group cannot move independently, the third linkage mechanism can still move. Therefore, the second locking member 13 needs to be locked with the second locking part 11 on the base 1 or the second moving member 2 in order to completely lock the entire moving device and keep the second moving member 2 and the base 1 stationary.

[0049] In simple terms, the first locking member 12 and the first locking part 10 can simultaneously lock the first and second four-bar linkages. At this point, the motion device can still move because a third linkage exists. Therefore, it is further locked by the second locking member 13 and the second locking part 11 to ultimately lock the motion device. Both the first locking member 12 and the second locking member 13 are controlled by the control component. Therefore, the locking mechanism is ingeniously designed, the locking and unlocking operations are simple and quick, and the support effect after locking is excellent.

[0050] The specific structure of the motion device will be further described as follows:

[0051] Specifically, such as Figures 1-7 As shown, the first linkage group includes a first link 3 and a first moving member 4; the second linkage group includes a second link 5 and a mounting base 6. The first four-bar linkage mechanism composed of the base 1, the first link 3, the first moving member 4, and the transmission member 9 is a four-bar linkage mechanism, and the second four-bar linkage mechanism composed of the transmission member 9, the second link 5, the mounting base 6, and the second moving member 2 is also a four-bar linkage mechanism. The locking link can be any one of the first, second, third, or mounting base, and the passive link and the locking link are in different linkage groups. Further, the locking link is the mounting base 6, and the passive link is the first moving member 4; therefore, in this design, the mounting base 6 and the first moving member 4 are rotatably connected to the transmission member 9 at the same rotation point. Positionally, the lower end of the first connecting rod 3 is rotatably connected to the rear of the base 1, and the upper end of the first connecting rod 3 is rotatably connected to the rear of the transmission member 9. The lower end of the first moving member 4 is rotatably connected to the front of the base 1, and the upper end of the first moving member 4 is rotatably connected to the rear ends of the transmission member 9 and the mounting base 6. The first moving member 4 is located in front of the first connecting rod 3 and is closer to the second moving member 2 than the first connecting rod 3. The front end of the second connecting rod 5 is rotatably connected to the upper part of the second moving member 2, and the rear end of the second connecting rod 5 is rotatably connected to the upper part of the transmission member 9. The front end of the mounting base 6 is rotatably connected to the lower part of the second moving member 2. The mounting base 6 is located below the second connecting rod 5 and is closer to the base 1 than the second connecting rod 5. The positions of the first moving member 4 and the mounting base 6 are more suitable for locking. The rotational connection of the movable links is achieved through the rotating shafts of their respective rotation points.

[0052] To be more specific, such as Figure 8As shown, the transmission component 9 includes a first rotation point 91, a second rotation point, and a third rotation point, which are arranged in a triangular pattern. The mounting base 6 and the first moving component 4 are rotatably connected to the transmission component 9 at the first rotation point 91. The first connecting rod 3 is rotatably connected to the transmission component 9 at the second rotation point, and the second connecting rod 5 is rotatably connected to the transmission component 9 at the third rotation point. This design specifically sets three triangularly distributed rotation points on the transmission component 9 to achieve transmission between the first and second four-bar linkages. When unlocked, the first and second four-bar linkages can move together and jointly cause the second moving component 2 to perform multi-dimensional motion. The first rotation point 91 is the common rotation point, and the rotation shaft is located here. The transmission component 9 is roughly triangular in shape, and a clearance groove 90 is provided on the transmission component 9 to avoid the connecting rod. The shape of the transmission component 9 also corresponds to the distribution of the rotation points, and the clearance groove 90 allows the connecting rod to move smoothly.

[0053] The transmission component 9 can achieve movement by setting four or two rotation points, but in terms of effect, the transmission component 9 with three rotation points is better. Therefore, the transmission component 9 with three rotation points is adopted in this embodiment.

[0054] Both the first and second four-bar linkages are four-bar linkages, and their motion is more refined and fluid than existing technologies. Specifically, in one type of existing mechanism, two oscillating rods are sequentially connected to a base, enabling the second moving component to move relative to the base in two directions. However, this type of mechanism with two oscillating rods has a single motion trajectory, concentrated loads leading to wear, and a limited range of motion due to rod length, resulting in poor flexibility. In contrast, the double four-bar linkage of this solution offers controllable motion trajectories, allowing for the design of complex trajectories such as straight lines, ellipses, and specific curves. Multiple rods distribute the load, reducing stress concentration and improving load-bearing capacity and service life. More importantly, it offers high customizability; by pre-setting the trajectory according to requirements, it can achieve a wider range of motion coverage, resulting in more refined and flexible motion that generally meets user needs. The four-bar linkage has significant advantages in terms of motion complexity, load capacity, and dynamic performance, making it a superior solution for applications requiring high control accuracy and reliability.

[0055] Regarding locking: such as Figure 1 , 4As shown in Figure 7, when the first four-bar linkage is locked to the second four-bar linkage, the first moving member 4 is locked to the mounting base 6. The base 1, the first connecting member 3, the transmission member 9, the second connecting member 5, the second moving member 2, and the first moving member 4 and the mounting base 6 form the third linkage. When only the first moving member 4 and the mounting base 6 are locked, the third linkage is still a movable four-bar linkage. The second moving member 2 is not fully locked at this time. Therefore, in addition to locking the first and second four-bar linkages, the second locking member 13 and the second locking part 11 are also needed to lock the third linkage. Moreover, the first locking member 12 and the second locking member 13 lock or unlock simultaneously, and the first four-bar linkage, the second four-bar linkage, and the third linkage will be locked or unlocked synchronously.

[0056] Specifically, the operating component 14 is slidably mounted on the second moving component 2. While controlling the movement of the second moving component 2, the user can also control the operating component 14 to switch between unlocked and locked states, which can be completed with one hand, making operation more convenient. The driving component 15 is elongated, with its middle part rotatably connected to the mounting base 6. The two ends of the driving component 15 are respectively connected to the first locking component 12 and the second locking component 13. The driving component 15 is rotatably mounted on the mounting base 6. When the driving component 15 rotates, its two ends rotate together. Since the first and second locking components are rotatably connected to the two ends of the driving component 15, the first and second locking components 12 and 13 will move together to lock or unlock. That is, the state switching of the first, second and third linkage mechanisms can be controlled simultaneously, thereby realizing the unlocking and locking of the second moving component 2 in one step. The driving member 15 has two protrusions at both ends, with the two protrusions facing opposite directions. A first waist-shaped groove 151 and a second waist-shaped groove 152 are respectively formed on the two protrusions of the driving member 15. A first transmission post 121 is provided on the first locking member 12, and a second transmission post 131 is provided on the second locking member 13. The first transmission post 121 is inserted into the first waist-shaped groove 151, and the second transmission post 131 is inserted into the second waist-shaped groove 152. The driving member 15 and the locking member achieve transmission through the waist-shaped grooves and transmission posts, resulting in a simple structure. Moreover, even after changing its posture during movement, the transmission post can still remain in the waist-shaped groove.

[0057] One end of the locking link 6 is inserted with a rotating shaft, and the other end is inserted with a first rotating shaft (not shown). The locking link 6 is rotatably connected to the base 1 or the second moving member 2 via the first rotating shaft. The first locking member 12 is slidably disposed on the rotating shaft, and the second locking member 13 is slidably disposed on the first rotating shaft. In this design, the locking link is a mounting base 6, which is rotatably connected to the second moving member 2 via the first rotating shaft. The first locking part 10 is disposed on the first moving member 4, and the second locking part 11 is disposed on the second moving member 2. Under the action of the driving member 15, the first locking member 12 and the second locking member 13 slide on the rotating shaft and the first rotating shaft to achieve locking and unlocking. In addition, a circumferential limiting structure needs to be provided between the first locking member 12, the second locking member 13, and the locking link 6 to maintain the synchronous rotation of the first locking member 12, the second locking member 13, and the locking link 6. The circumferential limiting structure can be a convex-groove structure, etc. Furthermore, since the middle part of the drive member 15 rotates and the two locking members are located on both sides of the drive member 15, the sliding directions of the two locking members are opposite when the drive member 15 rotates. Therefore, the orientation directions of the first locking member 12 and the second locking member 13 should also be opposite.

[0058] The locking elements and locking parts achieve selective locking through planar meshing teeth 16: The first locking element 12, the second locking element 13, the first locking part 10, and the second locking part 11 all have a plurality of planar meshing teeth 16 evenly distributed circumferentially. The planar meshing teeth 16 are all located on the end face of their respective components. The first locking element 12 selectively engages with the first locking part 10, and the second locking element 13 selectively engages with the second locking part 11. The engagement and locking of the locking elements and locking parts are achieved through planar meshing teeth 16 evenly distributed circumferentially on the same plane. A locking spring (not shown) is also fitted on the first rotating shaft on which the second locking element 13 is mounted. The locking spring always provides a spring force to the second locking element towards the second locking part 11. When the user does not control the operation element 14, the first and second locking elements are always locked with the first and second locking parts. When the user controls the operation element 14, the drive element 15 rotates and counteracts the spring force of the locking spring to make the lock engage, thus making operation easier and simpler.

[0059] Of course, damping plates can also be installed at the ends of each moving link to achieve the effect of keeping it stationary after movement.

[0060] In addition, such as Figure 9As shown, the first connecting rod 3 has a backward-protruding curved arc, meaning the first connecting rod 3 bends from bottom to top and forward. A mounting groove 101 is provided on the base 1, and the lower end of the first connecting rod 3 is positioned in the mounting groove 101. The end face of the mounting groove 101 away from the first connecting rod 3 is an arc surface 102. The arc surface 102 adapts to the bending of the first connecting rod 3, and in conjunction with the bent first connecting rod 3, it can be used to increase the rotation angle to solve the problem of the straight rod colliding with the base 1, causing motion interference, and the problem of the rotation angle being too small.

[0061] like Figures 1-3 As shown in Figure 13, the motion device is applied to a headrest, which includes a head support assembly and the aforementioned motion device. The head support assembly includes a headrest frame 17 and a headrest bracket 2. The headrest frame 17 is rotatably mounted on the headrest bracket 2 about a left-right axis. The headrest frame 17 is configured to fit against and support the human head and neck. The headrest bracket 2 is the second moving component, and the base 1 is configured to connect to the back of the seat. When the headrest bracket 2 moves relative to the base 1, it drives the headrest frame 17 to move together.

[0062] This headrest uses the aforementioned motion device for movement adjustment and support, enabling multi-dimensional movement and varied postures to adapt to the different needs of various users. Users can obtain more reasonable and comfortable head and neck support, conforming to ergonomic principles. The headrest frame 17 can also rotate relative to the headrest frame 2, adapting to the curve and tilt angle of the human head and neck. When the headrest frame 2 is locked, the movement of the headrest frame 17 is also locked. Furthermore, the headrest frame 17 can adaptively rotate relative to the headrest frame 2 to conform to the human head and neck; even when the movement of the headrest frame 17 is locked, it can still rotate. This motion device can also be applied to lumbar supports.

[0063] In addition, such as Figure 10 As shown, the pillow frame 2 has a receiving groove 201, and the operating member 14 is slidably disposed in the receiving groove 201. The pillow frame 2 has a downwardly protruding protrusion 202, and the operating member 14 has a vertically penetrating sliding groove 141. The protrusion 202 is inserted into the sliding groove 141, making the operating member 14 slide more stably on the pillow frame 2. Furthermore, the operating member 14 is also provided with a lever 18. The pillow frame 2 includes two side-by-side support arms 21, one of which has a window 22. The lever 18 passes through the window 22 and connects to the operating member 14, making operation more convenient.

[0064] like Figure 11 , 12As shown, the driving component 15 is rotatably mounted on the mounting base 6, and the operating component 14 is movably mounted on the headrest frame 2. The operating component 14 is connected to the driving component 15, but the headrest frame 2 and the mounting base 6 will also rotate relative to each other. At this time, the transmission between the driving component 15 and the operating component 14 needs to adapt to the rotation of the mounting base 6 and the headrest frame 2. Specifically, the rear end of the operating component 14 is provided with a first connecting part 142, and the front end of the driving component 15 is provided with a second connecting part 153. The first connecting part 142 has a first arc-shaped surface 143 facing the second connecting part 153, and the second connecting part 153 has a corresponding second arc-shaped surface 154. The two cooperate with each other so that the driving component 15 and the operating component 14 can adapt to the relative rotation of the mounting base 6 and the headrest frame 2. A groove is made in the first arc-shaped surface 143 on the first connecting part 142, forming two sidewalls 144 in the groove. The sidewalls 144 are naturally located beside the first arc-shaped surface 143 and are further forward relative to the first arc-shaped surface 143. A spherical transmission part 155 is protruding from the second arc-shaped surface 154 of the second connecting part 153. The spherical transmission part 155 protrudes forward from the second arc-shaped surface 154 and is located exactly between the two side walls 144. When the headrest frame 2 and the mounting base 6 rotate, the transmission part 155 rotates between the two side walls 144, and the two are configured to abut against each other for transmission. That is, when the operating member 14 slides, the transmission part 155 can be pushed to move by the side wall 144 at any position of the side wall 144, so that the sliding of the operating member 14 can always be transmitted to the driving member 15.

Claims

1. A mechanism for achieving synchronous locking, characterized in that: It includes a drive unit, a mounting base, and at least two locking members. At least two moving members are movably provided on the mounting base. The drive unit is movably provided on the mounting base, and the drive unit and the locking members are both connected in a transmission manner. The locking members are located next to the moving members. The drive unit is configured such that when the drive unit moves relative to the mounting base, it drives all the locking members to move synchronously toward the locking members or synchronously away from the locking members. When all the locking members move toward the moving members, all the moving members are locked synchronously. When all the locking members move away from the locking members, all the moving members are unlocked synchronously.

2. The mechanism for achieving synchronous locking according to claim 1, characterized in that: Two moving parts are rotatably connected to the two ends of the mounting base, and the driving part is rotatably mounted on the mounting base; the locking part is slidably mounted between the moving parts and the mounting base, and the two locking parts are tractively connected to the two ends of the driving part, with the two locking parts facing opposite directions.

3. The mechanism for achieving synchronous locking according to claim 2, characterized in that: The driving component has two protrusions at both ends, with the two protrusions facing opposite directions; the protrusions have waist-shaped grooves, and the locking component has a transmission column protruding from it, which is inserted into the waist-shaped groove.

4. The mechanism for achieving synchronous locking according to claim 3, characterized in that: The drive component is long and narrow.

5. The mechanism for achieving synchronous locking according to claim 2, characterized in that: The moving part is rotatably connected to the mounting base via a rotating shaft, and the locking element is slidably mounted on the rotating shaft.

6. The mechanism for achieving synchronous locking according to claim 1, characterized in that: Both the moving part and the locking part are provided with planar meshing teeth, which are evenly distributed circumferentially on the moving part and the locking part.

7. The mechanism for achieving synchronous locking according to claim 1, characterized in that: A locking spring is provided between any locking element and the mounting base, and the locking spring is configured to provide a spring force to the locking element toward the moving element.

8. The mechanism for achieving synchronous locking according to claim 1, characterized in that: It also includes an operating component, which is slidably mounted on any moving component and configured to be connected to the driving component in a transmission manner.

9. A motion device, characterized in that: The device includes a base, a first connecting rod, a first moving member, a second connecting rod, a second moving member, a transmission member, and the mechanism described in any one of claims 1-8. The base is rotatably connected to one end of the first connecting rod and one end of the first moving member, and the other end of the first connecting rod and the first moving member is rotatably connected to the transmission member. The second moving member is rotatably connected to one end of the mounting base and one end of the second connecting rod, and the other end of the second connecting rod is rotatably connected to the transmission member. The other end of the mounting base is rotatably connected to the transmission member and the first moving member. There are two locking members, which are respectively disposed on the sides of the first moving member and the second moving member.

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