Adaptive transmission structure and supporting and adjusting mechanism

Abstract

The utility model provides an adaptive transmission structure and a support adjusting mechanism. The adaptive transmission structure comprises a first moving part and a second moving part which are rotationally connected, and a sliding first transmission part and a second transmission part which is in transmission connection with the first transmission part are respectively arranged. The arc-shaped surfaces are matched with each other to adapt to relative rotation of the two moving parts, so that interference is avoided. A rotating space is formed by two side walls beside the arc-shaped surface of the first transmission part; and the transmission part on the arc-shaped surface of the second transmission part is arranged in the rotating space. When the moving part rotates, the transmission part moves in the space; when the first transmission piece slides, the side wall pushes the transmission part, and transmission is achieved. The structure is suitable for transmission between two rotatable moving parts, and solves the transmission problem of a complex connecting rod mechanism. The supporting and adjusting mechanism comprises a supporting piece and the adaptive transmission structure, the second moving piece is rotationally arranged on the supporting piece, the first locking piece and the second locking piece are locked with the first locking part and the second locking part in a matched mode after transmission of the adaptive transmission structure, and therefore locking of the whole supporting and adjusting mechanism is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to furniture field, especially a kind of adaptive transmission structure and support adjusting mechanism. BACKGROUND

[0002] In furniture, many locking structures are directly arranged on movable components, and switches are generally also directly arranged on the movable components. The movable components are movably arranged on a main body component. After moving relative to the main body component, the locking and unlocking of the movable components can still be directly controlled. For example, rotating armrests, lifting armrests, etc. However, if the main component also moves when the movable component moves, the main component also needs to be locked when locking. At this time, not only more cost is needed to set up two locking structures, but also one or more switches need to be set up at other positions through pull wires. If two switches are directly set up on the main body component and the movable component, the operation difficulty will be greatly increased, and the user cannot control two switches at the same time while adjusting the movable component.

[0003] However, if the positions of the movable component and the main body component are not suitable for setting pull wires (such as no wiring space, pull wires will be exposed, etc.) or very long pull wires are needed to achieve control, how will technicians achieve the locking and unlocking of them?

[0004] Imagine a device with a relatively complex linkage mechanism on a fixed component. The movable component is set at the other end of the mechanism. When adjusting the movable component, the linkage mechanism will also move, and relative rotation will occur between the linkage and the movable component during the movement. When locking the movable component, the entire linkage mechanism and the movable component need to be locked at this time. Multiple positions or points need to be locked. It is known that separate locking of each component not only requires a lot of effort in design, but also wastes component costs. Therefore, it is a better way to lock multiple locking positions through a switch in series. To achieve multi-point series locking, the first problem to be solved is to adapt to the rotation between components and to achieve transmission, that is, adaptive transmission. SUMMARY

[0005] To solve the above technical problems, the utility model provides a kind of adaptive transmission structure, including first, second moving parts of rotation connection, respectively equipped with the first transmission part of sliding and the second transmission part of transmission connection with it. Two arc surfaces cooperate with each other, can adapt to the relative rotation of two moving parts, avoid interference. The arc surface of first transmission part forms rotation space by two side walls, and the transmission part on the arc surface of second transmission part is disposed in the rotation space. When the moving part rotates, the transmission part moves in the space. When the first transmission part slides, the side wall pushes the transmission part, and realizes transmission transmission. The structure is suitable for transmission between two rotatable moving parts, solves the transmission problem of complex connecting rod mechanism, and can lock one transmission part as switch, to realize the simultaneous locking of multiple transmission parts. A plurality of structures in series can form a long transmission chain, and adapt to more connecting rod movement mechanisms. The adaptive transmission structure realizes adaptive transmission, reduces cost, simplifies operation, effectively improves product quality and competitiveness, and helps manufacturers to improve efficiency.

[0006] Further provided is a support adjusting mechanism, including a support and the adaptive transmission structure described above, the second moving part is rotatably arranged on the support, the second transmission part is rotatably arranged on the second moving part, and the first and second locking members are movably connected in transmission. The first and second locking parts are respectively arranged on the first moving part and the support. By operating the first transmission part, the first and second locking members are locked with the first and second locking parts through the transmission of the above structure, so that the whole mechanism is locked.

[0007] The technical scheme of the utility model is as follows:

[0008] An adaptive transmission structure includes a first moving part and a second moving part, the first moving part is rotatably connected with the second moving part, the first moving part is provided with a first transmission part, the second moving part is provided with a second transmission part, the first transmission part is slidably arranged on the first moving part, and the first transmission part is in transmission connection with the second transmission part.

[0009] The first transmission part and the second transmission part are both provided with arc surfaces, and the two arc surfaces cooperate with each other. The arc surfaces are configured to adapt to the relative rotation of the first moving part and the second moving part by the cooperation of the arc surfaces of the first transmission part and the second transmission part.

[0010] The first transmission part is provided with two side walls beside the arc surface, and a rotation space is formed between the two side walls. The second transmission part is provided with a transmission part on the arc surface, and the transmission part is arranged in the rotation space. When the first moving part and the second moving part rotate, the transmission part moves in the rotation space. When the first transmission part slides, the transmission part moves at any position of the side wall, and the side wall can push the transmission part to move, so that the sliding of the first transmission part can always be transmitted to the second transmission part.

[0011] The adaptive transmission structure can be applied to the transmission between two rotatable moving parts. When the two moving parts rotate relative to each other, the arc surfaces between the transmission parts will cooperate to rotate without interference. When one of the transmission parts moves, the transmission between the two can be achieved through the abutment of the side wall and the transmission part and the pushing force. The problem of transmission in a complex linkage mechanism is solved, and one of the transmission parts can be used as a switch for locking and unlocking, achieving the effect of simultaneously locking multiple transmission parts. Of course, if multiple structures are used in series, a long enough transmission chain can be formed, which is suitable for more linkage mechanisms. The structure not only realizes adaptive transmission, but also reduces the cost of parts and simplifies the operation. After successfully solving the above problems, the innovative structure greatly improves the quality and competitiveness of the product and improves the manufacturer's benefits.

[0012] As a preferred, the arc surface of the first transmission part is slotted, the slot forms the rotating space on the first transmission part, and two side walls are formed in the slot, and the side walls are located beside the arc surface of the first transmission part. The structure is simple, and the side walls required for transmission can be formed by simply slotting.

[0013] As a preferred, the center of the arc surface is the rotation point of the first moving part and the second moving part. It is used for adapting to the rotation of the first moving part and the second moving part without interference and obstruction.

[0014] As a preferred, the first transmission part is provided with a first connecting part near the end close to the second transmission part, the second transmission part is provided with a second connecting part near the end close to the first transmission part, the first connecting part is provided with a first arc surface towards the second connecting part, and the second connecting part is provided with a second arc surface correspondingly. The first transmission part and the second transmission part are provided with a connecting part specially used for connecting transmission, which liberates the multifunctionality of the first transmission part and the second transmission part. For example, the first transmission part can be used as an operating part or a switch to control the locking and unlocking of the mechanism, and the second transmission part can be used as a driving part to drive the locking part.

[0015] As a preferred, the first connecting part extends from the first transmission part in the rotation direction of the first moving part. It is used for covering enough rotation range, so that the transmission part can always be kept in the rotating space.

[0016] As a preferred, the second connecting part is curved upwards from the second transmission part towards the first connecting part. The shape of the second connecting part is matched with the shape of the second transmission part and the first connecting part.

[0017] As a preferred, the first transmission part is provided with two arc-shaped sheet-shaped bodies spaced left and right at one end close to the second transmission part, the end surface of the arc-shaped sheet-shaped body towards the second transmission part is the arc surface, the arc-shaped sheet-shaped bodies form the rotating space therebetween, and the opposite end surfaces of the arc-shaped sheet-shaped bodies are the side walls.

[0018] As a preferred, the transmission part is spherical. Reduce the friction with the side wall when rotating, reduce wear and improve life.

[0019] The support adjusting mechanism comprises a support and the adaptive transmission structure, the support is rotationally connected with the second moving part, the second transmission part is rotationally arranged on the second moving part, the first locking part and the second locking part are rotationally connected on the second transmission part, the first locking part is movably arranged between the first moving part and the second moving part, the second locking part is movably arranged between the second moving part and the support, the first locking part and the second locking part are circumferentially limited with the second moving part and rotate with the rotation of the second moving part, the first moving part is provided with a first locking part, the support is provided with a second locking part, the first locking part and the first locking part are selectively matched and locked, and the second locking part and the second locking part are selectively matched and locked; when the first transmission part slides on the first moving part, the second transmission part rotates on the second moving part, and the first locking part and the second locking part move together, when the first locking part and the second locking part move to be matched and locked with the first locking part and the second locking part respectively, the support, the second moving part and the first moving part are relatively static.

[0020] The adaptive transmission structure solves the problem of both adapting to the rotation between components and realizing transmission, so that the product can be locked at multiple locking positions in series through one switch, avoids setting a locking structure and a corresponding switch for each component, and does not need to use a pull wire, thereby reducing the number of parts, reducing the cost of parts, saving the effort and time cost of designing a locking mechanism for each component in the design process, and greatly simplifying the operation process of the user, improving the convenience and experience of use, and the user can more easily adjust the movable component and complete the locking.

[0021] As a preferred, the first locking part, the second locking part, the first locking part and the second locking part are all provided with planar meshing teeth.

[0022] The design starting point, concept and beneficial effects of the utility model with the above technical scheme are:

[0023] The adaptive transmission structure can be applied to transmission between two rotatable moving parts, when relative rotation is generated between the two moving parts, the arc surfaces between the transmission parts cooperate to generate non-interference relative rotation, when one of the transmission parts moves, transmission between the two can be realized through abutment and thrust force of the side wall and the transmission part; the transmission problem in the complex linkage mechanism is solved, and then one of the transmission parts can be used as a switch for locking and unlocking, the effect of simultaneously locking multiple transmission parts is realized; of course, if multiple structures are used in series, a long enough transmission chain can also be formed, which is suitable for more linkage mechanisms; the structure not only realizes adaptive transmission, but also has the advantages of reducing the cost of parts and simplifying the operation, after successfully solving the above problems, the product quality and competitiveness are greatly improved, and the manufacturer's benefits are improved.

[0024] The support adjusting mechanism solves the problem of both adapting to the rotation between parts and realizing transmission through the adaptive transmission structure, so that the product can be locked in multiple locking positions through a switch in series, avoiding the need to separately set a locking structure and a corresponding switch for each part, and without the need to use a pull wire, reducing the number of parts used, thereby reducing the cost of parts, and saving the effort and time cost of separately designing a locking mechanism for each part during the design process; moreover, the scheme only needs one switch to realize locking and unlocking of multiple positions, greatly simplifying the operation process of the user, improving the convenience and experience of use, and the user can more easily adjust the movable parts and complete locking; after reducing the cost and optimizing the experience, the competitiveness and market share of the product will be effectively improved. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 A first, second four-bar linkage mechanism headrest three-dimensional structure schematic diagram is shown in the embodiment of the utility model;

[0026] Figure 2 The headrest relative to Figure 1 The three-dimensional structure schematic diagram of the headrest after movement Figure 1 ;

[0027] Figure 3 The headrest relative to Figure 1 The three-dimensional structure schematic diagram of the headrest after movement Figure 2 ;

[0028] Figure 4 The adaptive transmission structure is provided on the support adjusting mechanism in the embodiment of the utility model, and the three-dimensional structure schematic diagram is shown;

[0029] Figure 5 A third linkage mechanism headrest side view is shown in the embodiment of the utility model;

[0030] Figure 6 It is the three-dimensional structure schematic view of the locking part in the embodiment of the utility model;

[0031] Figure 7 It is the three-dimensional structure schematic view of the second locking part in the embodiment of the utility model;

[0032] Figure 8 It is the three-dimensional structure schematic view of the connecting part in the embodiment of the utility model;

[0033] Figure 9 It is the three-dimensional structure schematic view of the base in the embodiment of the utility model;

[0034] Figure 10 It is the three-dimensional structure schematic view of the first moving part and the backrest frame in the embodiment of the utility model;

[0035] Figure 11 It is the bottom view of the second transmission part and the first transmission part transmission connection in the embodiment of the utility model;

[0036] Figure 12 It is the three-dimensional structure schematic view of the second transmission part and the first transmission part transmission connection in the embodiment of the utility model;

[0037] Figure 13 It is the three-dimensional structure schematic view of the adaptive transmission structure in the embodiment of the utility model;

[0038] Figure 14 It is the sectional view of the adaptive transmission structure in the embodiment of the utility model.

[0039] The reference numerals are: base 1;Mounting groove 101;Camber surface 102;First moving part, backrest frame 2;Receiving groove 201;Bump 202;Support arm 21;Window 22;First connecting rod 3;Supporting part, passive connecting rod 4;Second connecting rod 5;Second moving part, locking connecting rod 6;Connecting part 9;First rotation point 91;Avoidance groove 90;Second locking part 10;First locking part 11;Second locking part 12;Second transmission column 121;First locking part 13;First transmission column 131;First transmission part 14;Slide groove 141;First link part 142;First arc surface 143;Side wall 144;Second transmission part 15;First waist type groove 151;Second waist type groove 152;Second link part 153;Second arc surface 154;Transmission part 155;Plane engagement tooth 16;Backrest frame 17;Dial block 18;Arc sheet body 19. DETAILED DESCRIPTION

[0040] 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.

[0041] 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.

[0042] 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.

[0043] The specific embodiments of this utility model are as follows:

[0044] like Figures 1-4 As shown, this utility model provides an adaptive transmission structure, which includes a first moving component, a second moving component, a first transmission component, and a second transmission component. This adaptive transmission structure is applied in a support adjustment mechanism, which is composed of a double four-bar linkage. Specifically, the mechanism includes a base 1, a first moving component 2, a first linkage group, a second linkage group, and a connector 9. The two ends of the first linkage group are rotatably connected to the base 1 and the connector 9 respectively to form a first four-bar linkage. The two ends of the second linkage group are rotatably connected to the first moving component 2 and the connector 9 respectively to form a second four-bar linkage, so that the first moving component 2 can move relative to the base 1 in at least two directions.

[0045] It also includes a control component, a second locking member 12, a first locking member 13, and a second moving member 6. The control component includes a first transmission member 14 and a second transmission member 15. The first transmission member 14 is movably mounted on the first moving member 2 or the base 1, and the first transmission member 14 and the second transmission member 15 are connected in a transmission manner. The second linkage group includes a locking link 6, and the first linkage group has a passive link 4. The second transmission member 15 is movably mounted on the locking link 6. The locking link 6 and the passive link 4 are rotatably mounted on the connecting member 9 via the same rotating shaft (not shown). The second locking member 12 and the first locking member 13 are both linked with the second transmission member 15. The passive link 4 is provided with a second locking part 10, and the second locking member 12 is located beside the second locking part 10. The second locking member 12 is configured to selectively engage with the second locking part 10 to lock as the control component moves. When the second locking member 12 engages with the first locking part 11 to lock, the first four-bar linkage mechanism and the second four-bar linkage mechanism are locked.

[0046] When the first four-bar linkage and the second four-bar linkage are locked, the base 1, the first linkage assembly, the second linkage assembly, the connecting piece 9 and the first moving piece 2 form a third linkage, the first moving piece 2 is provided with a first locking part 11, the first locking part 11 is located beside the first locking part 11, the first locking part 11 is configured to selectively cooperate with the first locking part 11 with the movement of the control assembly, when the first locking part 11 cooperates with the first locking part 11, the third linkage is locked, and the first moving piece 2 remains stationary with the base 1.

[0047] The first four-bar linkage and the second four-bar linkage are both four-bar linkages, and the third linkage is a four-bar linkage. When unlocked, the first four-bar linkage and the second four-bar linkage can produce multi-directional movement of the first moving piece 2 relative to the base 1, and at least position switching in a plane, so as to realize the adjustment function. When the first moving piece 2 moves, the first four-bar linkage and the second four-bar linkage form a double four-bar linkage, compared with the prior art, the adjustment capacity of the support adjustment mechanism is better, mainly reflected in the mobility and flexibility of the first moving piece 2, which can better meet the multi-use needs of users and better meet the ergonomics.

[0048] In addition, the locking mechanism is simple in structure and ingenious in implementation:

[0049] The locking link 6 and the passive link 4 are rotatably arranged on the connecting piece 9 through the same rotation shaft, that is, the first linkage assembly and the second linkage assembly have a common rotation point (the first rotation point 91) on the connecting piece 9, that is, the rotation points of the locking link 6 and the passive link 4 on the connecting piece 9, and the three are rotatably connected at the point. At the common rotation point, the locking link 6, the passive link 4 and the connecting piece 9 all rotate around the same axis, and the second locking part 10 and the second locking part 12 are arranged at the common rotation point, so as to realize the simultaneous locking and unlocking of the first and second linkage assemblies.

[0050] Specifically, the second transmission part 15 is arranged on the locking link 6, and the second transmission part 15 is connected with the second locking part 12, when the second locking part 12 is locked with the second locking part 10 on the passive link 4, the passive link 4 and the second transmission part 15 are also locked, and 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 connecting piece 9. Since the first four-bar linkage and the second four-bar linkage are both four-bar linkages, the first four-bar linkage and the second four-bar linkage are locked.

[0051] 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 first locking member 13 needs to be locked with the first locking part 11 on the base 1 or the first moving member 2 in order to completely lock the entire support adjustment mechanism and keep the first moving member 2 and the base 1 stationary.

[0052] In simple terms, the second locking member 12 and the second locking part 10 can simultaneously lock the first and second four-bar linkages. At this time, the support adjustment mechanism can still move because a third linkage exists. Therefore, it is further locked by the first locking member 13 and the first locking part 11 to ultimately lock the support adjustment mechanism. Both the second locking member 12 and the first locking member 13 are controlled by the control component. Therefore, the structure is ingeniously designed, the locking and unlocking operations are simple and quick, and the support effect after locking is excellent.

[0053] The specific structure of the supporting adjustment mechanism is further described below:

[0054] Specifically, such as Figures 1-7 As shown, the first linkage group includes a first link 3 and a support 4; the second linkage group includes a second link 5 and a second moving member 6. The first four-bar linkage mechanism composed of the base 1, the first link 3, the support 4, and the connector 9 is a four-bar linkage mechanism; the second four-bar linkage mechanism composed of the connector 9, the second link 5, the second moving member 6, and the first 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; the passive link and the locking link are in different linkage groups. Further, the locking link is the second moving member 6, and the passive link is the support 4; therefore, in this design, the second moving member 6 and the support 4 are rotatably connected to the connector 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 connecting member 9. The lower end of the support member 4 is rotatably connected to the front of the base 1, and the upper end of the support member 4 is rotatably connected to the rear ends of the connecting member 9 and the second moving member 6. The support member 4 is located in front of the first connecting rod 3 and is closer to the first 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 first moving member 2, and the rear end of the second connecting rod 5 is rotatably connected to the upper part of the connecting member 9. The front end of the second moving member 6 is rotatably connected to the lower part of the first moving member 2. The second moving member 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 support member 4 and the second moving member 6 are more suitable for locking. The rotational connection of the movable links is achieved through the pivot of their respective rotation points.

[0055] More specifically, as shown in Figure 8 The connecting piece 9 includes a first rotation point 91, a second rotation point and a third rotation point, which are in a triangular distribution. The second moving piece 6 and the support piece 4 are rotationally connected to the first rotation point 91 and the connecting piece 9, the first connecting rod 3 is rotationally connected to the second rotation point and the connecting piece 9, and the second connecting rod 5 is rotationally connected to the third rotation point and the connecting piece 9. This scheme specifically provides three rotation points in a triangular distribution on the connecting piece 9 to realize the transmission of the first four-bar linkage and the second four-bar linkage. The first four-bar linkage and the second four-bar linkage can move together and jointly make the first moving piece 2 move in multiple dimensions when unlocked. The first rotation point 91 is the common rotation point, and the rotation axis is provided at this point. The connecting piece 9 is roughly triangular, and the connecting piece 9 is provided with a avoiding slot 90 for avoiding the connecting rod. The shape of the connecting piece 9 also corresponds to the distribution of the rotation points, and the avoiding slot 90 can make the connecting rod move smoothly.

[0056] Four or two rotation points can also be provided on the connecting piece 9 to achieve movement, but from the effect, the connecting piece 9 with three rotation points is better, so three rotation points are used in this embodiment.

[0057] The first four-bar linkage and the second four-bar linkage are both four-bar linkages, and the movement of the four-bar linkage is more delicate and smooth than the prior art. Specifically, in one mechanism of the prior art, two swing rods are sequentially rotationally connected to the base, and the second moving piece can also move in two directions relative to the base, but this double-swing-rod mechanism has a single movement trajectory, the load is concentrated and easy to wear, the movement range is limited by the length of the rod, cannot reach more positions, and has poor flexibility. The double four-bar linkage mechanism of the present scheme has a controllable movement trajectory, can design complex trajectories such as straight lines, ellipses and specific curves, multiple rods share the load, reduce stress concentration, improve load capacity and service life, and more importantly, has high customization degree. After presetting the trajectory according to the demand, the movement range covers a wider range, the movement is delicate and more flexible, and generally meets the user's demand. The four-bar linkage mechanism has obvious advantages in movement complexity, load capacity and dynamic performance, and is a better solution in the case of high requirements for control accuracy and reliability.

[0058] In the locking aspect: as shown in Figure 1 , 4When the first four-bar linkage and the second four-bar linkage are locked, the support 4 is locked with the second moving part 6, the base 1, the first connecting rod 3, the connecting part 9, the second connecting rod 5, the first moving part 2 and the support 4 and the second moving part 6 form a third connecting rod. When only the support 4 and the second moving part 6 are locked, the third connecting rod is still a movable four-bar linkage, the first moving part 2 is not completely locked at this time, and therefore the first locking part 13 and the first locking part 11 are required to lock the third connecting rod in addition to locking the first four-bar linkage and the second four-bar linkage. Moreover, the second locking part 12 and the first locking part 13 are simultaneously locked or unlocked, and the first four-bar linkage, the second four-bar linkage and the third connecting rod are synchronously locked or unlocked.

[0059] Specifically, the first transmission part 14 is slidingly arranged on the first moving part 2, and the user can control the first transmission part 14 to switch between the unlocked and locked states while controlling the movement of the first moving part 2, which can be completed by one hand, and the operation is more convenient. The second transmission part 15 is in the shape of a long strip, the middle part of which is rotatably connected to the second moving part 6, and the two ends of the second transmission part 15 are respectively in transmission connection with the second locking part 12 and the first locking part 13. The second transmission part 15 is rotatably arranged on the second moving part 6, and when the second transmission part 15 rotates, the two ends thereof rotate together. Since the first and second locking parts are in transmission connection with the two ends of the second transmission part 15, the first and second locking parts 12 and 13 will move together to be locked or unlocked, that is, the state of the first, second and third connecting rods can be controlled at the same time, so that the unlocking and locking of the first moving part 2 can be achieved at one step. The two ends of the second transmission part 15 are respectively provided with two protruding parts, the directions of the two protruding parts are opposite, and the two protruding parts of the second transmission part 15 are respectively provided with a first waist-shaped groove 151 and a second waist-shaped groove 152. The second transmission part 15 is provided with a second transmission column 121, and the first locking part 13 is provided with a first transmission column 131. The second transmission column 121 is inserted into the first waist-shaped groove 151, and the first transmission column 131 is inserted into the second waist-shaped groove 152. The second transmission part 15 and the locking part are in transmission through the waist-shaped grooves and the transmission columns, and the structure is simple. Moreover, the transmission column can still be retained in the waist-shaped groove in the case of changing the posture of the moving part.

[0060] One end of the locking link 6 is provided with a rotating shaft, and the other end of the locking link 6 is provided with a first rotating shaft (not shown), and the locking link 6 is rotatably connected to the base 1 or the first moving part 2 through the first rotating shaft. The second locking part 12 is slidably arranged on the rotating shaft, and the first locking part 13 is slidably arranged on the first rotating shaft. In this scheme, the locking link is the second moving part 6, and the second moving part 6 is rotatably connected to the first moving part 2 through the first rotating shaft. The second locking part 10 is arranged on the supporting part 4, and the first locking part 11 is arranged on the first moving part 2. Under the action of the second transmission part 15, the second locking part 12 and the first locking part 13 slide on the rotating shaft and the first rotating shaft to realize locking and unlocking. In addition, a circumferential limiting structure needs to be arranged between the second locking part 12, the first locking part 13 and the locking link 6 to keep the synchronous rotation of the second locking part 12, the first locking part 13 and the locking link 6. The circumferential limiting structure can be a convex groove structure and the like. Moreover, since the middle part of the second transmission part 15 rotates, the two locking parts are located on the two sides of the second transmission part 15, so when the second transmission part 15 rotates, the sliding directions of the two locking parts are opposite, and therefore the orientation directions of the second locking part 12 and the first locking part 13 should also be opposite.

[0061] The locking part and the locking part are selectively locked by the plane meshing tooth 16: the second locking part 12, the first locking part 13, the second locking part 10 and the first locking part 11 are uniformly distributed with a plurality of plane meshing teeth 16 along the circumference, and the plane meshing teeth 16 are located on the end face of the part. The second locking part 12 and the second locking part 10 are selectively engaged and locked, and the first locking part 13 and the first locking part 11 are selectively engaged and locked. The engagement and locking of the locking part and the locking part are realized by the plane meshing teeth 16 uniformly distributed on the same plane. A locking spring (not shown) is also provided on the first rotating shaft on which the first locking part 13 is installed. The locking spring always gives the second locking part a spring force towards the first locking part 11. When the user does not control the movement of the first transmission part 14, the first and second locking parts are always locked with the first and second locking parts. When the user controls the movement of the first transmission part 14, the second transmission part 15 rotates and resists the spring force of the locking spring to make the locking contact, so that the operation becomes more easy and simple.

[0062] Of course, a damping piece can also be arranged at the end of each movable link to realize the effect of keeping still after movement.

[0063] In addition, as Figure 9As shown, the first connecting rod 3 has a rearward convex curved arc, that is, the first connecting rod 3 is curved upward from bottom to top and forward. The base 1 is provided with a mounting groove 101, and the lower end of the first connecting rod 3 is arranged in the mounting groove 101. The end surface of the mounting groove 101 away from the first connecting rod 3 is an arc surface 102, which is adapted to the curvature of the first connecting rod 3. The curved first connecting rod 3 can be used to increase the rotation angle, so as to solve the problem that the straight rod is accommodated to interfere with the base 1, and the rotatable angle is too small.

[0064] As shown in the drawings, Figures 1-3 The support adjusting mechanism is applied to a headrest, which comprises a head support assembly and the support adjusting mechanism. The head support assembly comprises a headrest frame 17 and a headrest support 2. The headrest frame 17 is arranged on the headrest support 2 and is rotatable about an axis in the left-right direction. The headrest frame 17 is configured to fit and support the head and neck of a human body. The headrest support 2 is the second moving member, and the base 1 is configured to be connected with the back of a seat. When the headrest support 2 moves relative to the base 1, the headrest support 2 drives the headrest frame 17 to move together.

[0065] The headrest is adjusted and supported by the support adjusting mechanism, so that the headrest has multi-dimensional movement and variable posture to adapt to different needs of different users. The users can obtain more reasonable and comfortable support for the head and neck, which is in line with ergonomics. The headrest frame 17 can also rotate relative to the headrest support 2 to adapt to the curve and inclination angle of the head and neck of the human body. When the headrest support 2 is locked, the movement of the headrest frame 17 is also locked. In addition, the headrest frame 17 can also adaptively rotate relative to the headrest support 2 to fit the head and neck of the human body. Even if the movement of the headrest frame 17 is locked, the headrest frame 17 can still rotate. The support adjusting mechanism can also be applied to a waist rest.

[0066] In addition, as shown in the drawings, Figure 10 The headrest support 2 is provided with a protrusion 202 protruding downward, and the first transmission member 14 is provided with a sliding groove 141 penetrating upward and downward. The protrusion 202 is inserted into the sliding groove 141, so that the first transmission member 14 slides more stably on the headrest support 2. Further, the first transmission member 14 is also provided with a knob 18, and the headrest support 2 comprises two branch arms 21 diverging left and right. One of the branch arms 21 is provided with a window 22, and the knob 18 is connected with the first transmission member 14 through the window 22. The knob 18 makes the operation more convenient.

[0067] As shown in the drawings, Figures 11-14As shown, the second transmission member 15 is rotatably arranged on the second moving member 6, the first transmission member 14 is movably arranged on the headrest frame 2, the first transmission member 14 is in transmission connection with the second transmission member 15, but the headrest frame 2 and the second moving member 6 can also relatively rotate, at this time, the transmission of the second transmission member 15 and the first transmission member 14 also needs to adapt to the rotation of the second moving member 6 and the headrest frame 2. Specifically, the rear end of the first transmission member 14 is provided with a first connecting part 142, the front end of the second transmission member 15 is provided with a second connecting part 153, the first connecting part 142 is provided with a first arc surface 143 towards the second connecting part 153, the second connecting part 153 is correspondingly provided with a second arc surface 154, and the two arc surfaces cooperate with each other to enable the second transmission member 15 and the first transmission member 14 to adapt to the relative rotation of the second moving member 6 and the headrest frame 2. A groove is formed on the first connecting part 142 at the first arc surface 143, two side walls 144 are formed in the groove, and a rotation space is naturally formed between the two side walls 144. The side walls 144 are naturally located on the side of the first arc surface 143 and are more forward relative to the first arc surface 143. The second arc surface 154 of the second connecting part 153 is provided with a spherical transmission part 155, the spherical transmission part 155 protrudes forward from the second arc surface 154 and is located in the rotation space between the two side walls 144, and the transmission part can move in the rotation space. When the headrest frame 2 and the second moving member 6 rotate, the transmission part 155 rotates between the two side walls 144, and the two are configured to abut against the transmission, that is, when the first transmission member 14 slides, the connecting member is at any position of the side wall 144, the side wall 144 can push the connecting member to move, so that the sliding of the first transmission member 14 can always be transmitted to the second transmission member 15.

[0068] The first connecting part 142 extends from the first transmission member 14 in the rotation direction of the first moving member 2, for covering a sufficient rotation range, so that the transmission part 155 can always remain in the rotation space; the second connecting part 153 is upwardly bent and raised from the second transmission member 15 towards the first connecting part 142, and the shape of the second connecting part 153 is matched with the shape of the second transmission member 15 and the first connecting part 142.

[0069] More specifically, the end of the first transmission member 14 close to the second transmission member 15 is provided with two arc-shaped sheet bodies 19 which are spaced apart left and right, the end face of the arc-shaped sheet body 19 towards the second transmission member 15 is the first arc surface 143, the rotation space is formed between the arc-shaped sheet bodies 19, and the opposite end faces of the arc-shaped sheet bodies 19 are the side walls 144.

Claims

1. An adaptive transmission structure, characterized in that: It includes a first moving part and a second moving part, the first moving part and the second moving part are rotatably connected, the first moving part is provided with a first transmission part, the second moving part is provided with a second transmission part, the first transmission part is slidably disposed on the first moving part, and the first transmission part and the second transmission part are connected in transmission. Both the first and second transmission components are provided with arc-shaped surfaces. The two arc-shaped surfaces cooperate with each other. The arc-shaped surfaces are configured so that the first and second transmission components can adapt to the relative rotation of the first and second moving components through the cooperation of the arc-shaped surfaces. The first transmission component has two sidewalls on the side of the arc-shaped surface, and a rotation space is formed between the two sidewalls. The second transmission component has a transmission part protruding on the arc-shaped surface. The transmission part is set in the rotation space. When the first and second moving components rotate, the transmission part moves in the rotation space. When the first transmission component slides, the sidewall can push the transmission part to move at any position of the transmission part, so that the sliding of the first transmission component can always be transmitted to the second transmission component.

2. The adaptive transmission structure according to claim 1, characterized in that: A groove is cut into the arc-shaped surface of the first transmission component, forming the rotation space on the first transmission component, and two sidewalls are formed in the groove, with the sidewalls located beside the arc-shaped surface of the first transmission component.

3. The adaptive transmission structure according to claim 1, characterized in that: The center of the arc surface is the rotation point of the first moving part and the second moving part.

4. The adaptive transmission structure according to claim 1, characterized in that: The first transmission member has a first connecting part at its end near the second transmission member, and the second transmission member has a second connecting part at its end near the first transmission member. The first connecting part has a first arc-shaped surface facing the second connecting part, and the second connecting part has a corresponding second arc-shaped surface.

5. The adaptive transmission structure according to claim 4, characterized in that: The first connecting part extends from the first transmission member along the rotation direction of the first moving member.

6. The adaptive transmission structure according to claim 4, characterized in that: The second connecting part bends upwards from the second transmission member toward the first connecting part.

7. The adaptive transmission structure according to claim 1, characterized in that: The first transmission member has two arc-shaped plates spaced apart at one end near the second transmission member. The end face of the arc-shaped plates facing the second transmission member is the arc-shaped surface. The arc-shaped plates form the rotation space. The opposite end faces of the arc-shaped plates are sidewalls.

8. The adaptive transmission structure according to claim 1, characterized in that: The transmission part is spherical.

9. A support adjustment mechanism, characterized in that: The system includes a support member and an adaptive transmission structure as described in any one of claims 1-8. The support member is rotatably connected to the second moving member. The second transmission member is rotatably mounted on the second moving member. A first locking member and a second locking member are transmittedly connected to the second transmission member. The first locking member is movably mounted between the first and second moving members, and the second locking member is movably mounted between the second moving member and the support member. Both the first and second locking members are circumferentially limited by the second moving member and rotate with the rotation of the second moving member. The first moving member is provided with a first locking part, and the support member is provided with a second locking part. The first locking member selectively engages with the first locking part and locks itself, and the second locking member selectively engages with the second locking part. When the first transmission member slides on the first moving member, it drives the second transmission member to rotate on the second moving member and drives the first and second locking members to move together. When the first and second locking members move to engage with the first and second locking parts respectively, the support member, the second moving member, and the first moving member are all relatively stationary.

10. The support adjustment mechanism according to claim 9, characterized in that: The first locking member, the second locking member, the first locking part, and the second locking part are all provided with planar meshing teeth.

Images