WO2023087862A1

WO2023087862A1 - Flipping and adjusting mechanism, headrest-flipping device and headrest support

Info

Publication number: WO2023087862A1
Application number: PCT/CN2022/117603
Authority: WO
Inventors: 蔡赛军; 李晓鸿; 宋刚; 吕战征
Original assignee: 锐迈科技股份有限公司
Priority date: 2021-11-17
Filing date: 2022-09-07
Publication date: 2023-05-25

Abstract

A flipping and adjusting mechanism, a headrest-flipping device and a headrest support. The flipping and adjusting mechanism comprises a flipping connector (1) and a lifting assembly (2), wherein the lifting assembly (2) comprises a movable member (21) and a fixed assembly (22), and the flipping connector (1) is used for being rotatably connected to the movable member (21); and a limiting deflection member (221) is arranged on the fixed assembly (22), a limiting portion (11) matching the limiting deflection member (221) is arranged on the flipping connector (1), the movable member (21) is used for driving the flipping connector (1) to slide relative to the fixed assembly (22), and after the limiting portion (11) comes into contact with the limiting deflection member (221), the movable member (21) continues to push to enable the flipping connector (1) to rotate relative to the fixed assembly (22).

Description

An overturning adjustment mechanism, a headrest overturning device and a headrest bracket

technical field

The invention relates to the technical field of furniture, in particular to an overturn adjustment mechanism, a headrest overturn device and a headrest bracket.

Background technique

As a part of smart home, functional sofa is becoming more and more popular in life. Functional sofas usually have the functions of posture adjustment and shape transformation. Different parts such as legs, backrest, headrest, and waist can be adjusted to adapt to different groups of people and different sitting postures, so as to find the most comfortable angle for the body and relax the body.

The sofas with backrest angle adjustment function in the prior art usually cannot adjust the headrest alone, or need manual adjustment, which is not convenient enough to adjust the headrest. Although some sofa seats can meet the requirements of convenient adjustment, the adjustment structure is very complicated, the volume is large, the manufacture and installation are difficult, the cost is high, the reliability is poor, the function is single, and there is no anti-pinch function.

Contents of the invention

The technical problem to be solved by the present invention lies in the problems of complex structure, large volume, poor reliability, and difficulty in manufacture and installation of the existing overturn adjustment mechanism for sofa headrest angle adjustment.

In order to solve the above technical problems, the present application aims at the deficiencies and defects of the prior art, and provides an overturn adjustment mechanism, which includes an overturn connector and a lifting assembly, and the lift assembly includes a movable part and a fixed assembly, and the overturn connector uses to be rotatably connected with the movable part;

The fixed component is provided with a limiting deflection member, and the overturning connector is provided with a limiting part matched with the limiting deflector, and the movable part is used to drive the overturning connector relative to the fixed The assembly moves, and when the limiting portion contacts the limiting deflecting member, the movable member continues to push so that the turning connecting member rotates relative to the fixed assembly.

Further, the limiting portion includes a limiting guide surface, and during the rotation of the overturning link, the limiting guiding surface moves relatively with the limiting deflector.

Further, a limit nail is provided at the end of the movable part connected to the flip connector, and the limit nail is used to cooperate with the bottom surface of the flip connector to limit the rotation angle of the flip connector.

Further, the limiting deflection member is a limiting pin, and a bushing is provided on the limiting pin.

Further, the fixing assembly includes a fixing part and a mounting part, the fixing part and the mounting part are integrally formed, fixedly connected or separately arranged, and the limiting deflector is arranged on the mounting part.

Further, the fixed part is provided with a guide rail groove body, and the movable part is provided with a sliding groove body matched with the guide rail groove body, and the sliding groove body is slidably connected with the guide rail groove body.

Further, the movable part includes a lifting connection part, one end of the lifting connection part is hinged with the turning connection part, and the other end of the lifting connection part is used for connecting with the lifting rod.

Preferably, the movable part is provided with a guide chute, and the fixed assembly is provided with a sliding part slidably connected with the guide chute.

Further, a lifting connection part is provided between the two ends of the movable part, and the lifting connection part is used for connecting with the lifting rod.

Further, an elastic return member is further included, one end of the elastic return member is connected to the turning connector, and the other end of the elastic return member is used to be connected to the movable member.

The present application also provides a headrest flipping device, including a flipping connector, a lifting assembly, a lifting rod and a driving mechanism, the lifting assembly includes a movable part and a fixed assembly, and the flipping connecting part is used to rotatably connect with the movable part ;

The fixed component is provided with a limiting deflection member, and the overturning connector is provided with a limiting part matched with the limiting deflector, and the movable part is used to drive the overturning connector relative to the fixed The assembly moves, and when the limiting part is in contact with the limiting and deflecting member, the movable member continues to push so that the flip connecting member rotates relative to the fixed assembly;

The lifting rod is used for connecting with the movable part, and the middle part of the lifting rod is used for connecting with the output end of the driving mechanism.

Further, the driving mechanism drives the elevating rod to drive the movable part to a maximum lifting distance of 100mm-170mm, and the maximum adjustment angle of the movable part to push the turning connector while lifting is 40°-70°.

Further, it also includes a fixed rod, the two ends of the fixed rod are respectively connected to the fixed components on both sides, the middle part of the fixed rod is used to connect with the driving mechanism, and the fixed rod is connected to the bottom of the fixed component. The vertical distance between the ends is 300mm-400mm.

Further, the driving mechanism includes a driving motor, a driving guide rail and a slider, the slider is used to connect with the lifting rod, and the driving motor is used to drive the slider to drive the lifting rod along the drive Rail slides.

The present application also provides a headrest bracket, including a headrest board, a backrest frame and the headrest turning device, the headrest board is used to connect with the turning connector, the fixing assembly is connected to the backrest frame The installation side panel is connected, and the width of the installation side panel is 50mm-70mm.

Preferably, the headrest board includes a hinged first adjustment board and a second adjustment board, and the first adjustment board can rotate relative to the second adjustment board.

Implementing the embodiment of the present invention has the following beneficial effects:

The lifting assembly of the present invention drives the flipping connecting piece to lift up and down to realize switching between high and low backrests of the sofa, and the sliding lifting assembly cooperates with the limit deflection piece to rotate the flipping connecting piece, thereby realizing the angle adjustment of the sofa headrest. The resistance of the limiting deflection member deflects the overturning connecting member, the rotation movement is stable and the manufacturing and installation steps are reduced, which effectively reduces the cost.

The turning mechanism of the invention has a simple structure and takes up less space, so that the height and thickness of the headrest support are reduced, and can be used for an ultra-thin sofa that can automatically adjust the height of the backrest.

In the present invention, an elastic recovery part is provided between the turning connection part and the movable part, and the smooth recovery of the turning connection part can be realized through the elastic recovery part, which has the function of preventing hand pinching, and improves the safety of the turning device.

Description of drawings

In order to illustrate the technical solution of the present invention more clearly, the accompanying drawings that need to be used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention , for those skilled in the art, other drawings can also be obtained based on these drawings without creative work.

Fig. 1 is the schematic structural diagram of the flip adjustment mechanism of embodiment 1;

Fig. 2 is a structural schematic diagram of the connection between the turning connector and the lifting assembly in Embodiment 1;

Fig. 3 is the bottom view of embodiment 1 movable part and fixed assembly socket;

Fig. 4 is a schematic structural diagram of the unilateral arrangement of the lifting component in the headrest turning device of embodiment 1;

Fig. 5 is a structural schematic diagram of the symmetrical arrangement of the lifting components in the headrest turning device of Embodiment 1;

Fig. 6 is a structural schematic diagram of the expansion of the headrest board of the headrest bracket in Embodiment 1;

Fig. 7 is a schematic structural diagram of the folded headrest board of the headrest bracket in Embodiment 1;

Fig. 8 is a schematic structural view of the headrest bracket of Embodiment 2;

Figure 9 is a side view of the headrest support.

Among them, the reference numerals in the figure correspond to: 1-overturn connector, 11-limiting part, 12-adjusting plate connecting part, 111-limiting guide surface, 2-lifting assembly, 21-moving part, 211-sliding groove Body, 222-rail groove body, 212-lifting connector, 213-guide chute, 224-slider, 214-lifting connection, 22-fixed assembly, 221-limit deflection member, 2211-bush, 22a- Fixed part, 22b-installation part, 23-limiting part, 3-lifting rod, 31-slider connector, 4-fixed rod, 5-driving mechanism, 51-driving motor, 52-driving guide rail, 53-slider , 6-elastic return member, 7-headrest board, 8-backrest frame, 81-install side panels.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear" etc. is based on the orientation or positional relationship shown in the drawings, and is only for It is convenient to describe the present invention and simplify the description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and thus should not be construed as limiting the present invention. The terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of these features.

In addition, in the present invention, unless otherwise clearly specified and limited, terms such as "installation" and "connection" should be understood in a broad sense, for example, it may be a fixed connection, a detachable connection, or an integral connection; It can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

The invention provides an overturn adjustment mechanism, which can be used to adjust the angle of some structures in common furniture relative to the main body. For example, it can be installed on the sofa body to adjust the angle of the legs, backrest, headrest or waist of the sofa relative to the sofa body. In the embodiment of the present application, the turning adjustment mechanism is installed on the backrest frame of the sofa, and is used for adjusting the height of the backrest of the sofa and the angle of the headrest.

Example 1

As shown in Figures 1-5, this embodiment 1 provides a flip adjustment mechanism, including a flip connector 1 and a lift assembly 2, the lift assembly 2 includes a movable part 21 and a fixed assembly 22, and the movable part 21 can move relative to the fixed assembly 22 Sliding, overturning connector 1 is used for rotational connection with movable part 21; fixed assembly 22 is provided with limiting deflection member 221, and overturning connector 1 is provided with limiting part 11 matched with limiting deflecting member 221, and movable member 21 It is used to drive the turning connector 1 to move relative to the fixed assembly 22 . When the limiting part 11 is in contact with the limiting deflection member 221 , the movable member 21 continues to push to make the turning connecting member 1 rotate relative to the fixing assembly 22 .

Specifically, as shown in FIG. 2 , the overturn connector includes an integrally bent adjustment plate connecting portion 12 and a limiting portion 11, the adjusting plate connecting portion 12 is used to connect with an adjusting plate such as a headrest board, and the limiting portion 11 includes The limiting guide surface 111 , during the rotation of the overturning connector 1 , the limiting guiding surface 111 and the limiting deflecting member 221 move relatively. Specifically, the limit guide surface 111 is a guide inclined surface. When the movable part 21 drives the flip connector 1 to move upward until the limit guide surface 111 contacts the limit deflector 221, the movable part 21 continues to push, so that the flip connector 1 The limit deflector 221 rotates under the resistance. Preferably, the end of the guide inclined surface close to the movable part 21 is an arc-shaped guide surface, and the arc-shaped guide surface contacts and moves with the limit deflection member 221 to keep the rotating speed of the flipping connector 1 uniform, and avoid the occurrence of speed when the deflection angle of the flipping connector 1 increases. In the event of a sudden change, the turning connector keeps rotating at a constant speed, and the adjustment process is more stable. In this embodiment, the deflection movement of the sliding connection between the inclined-plane limit guide surface 111 and the limit deflection member 221 improves the stability of the rotation adjustment process of the turning connector 1 .

Specifically, a limiting member 23 is provided at one end of the movable member 21 connected to the turning connecting member 1 , and the limiting member 23 is used to cooperate with the bottom surface of the turning connecting member 1 to limit the rotation angle of the turning connecting member 1 . Specifically, the bottom surface of the turning connector 1 is provided with two contact planes of different heights that are opened and folded in cooperation with the limiter 23 . In some embodiments, the limiting member 23 may be a limiting structure such as a limiting rivet, a limiting pin, or a limiting block. Restricting the rotation angle of the overturning connector 1 by the limiting member 23 can prevent the overadjustment of the overturning connector from being unable to be retracted smoothly and reducing comfort.

In some embodiments, the limiting deflector 221 may be a limiting pin, and a bushing 2211 is sleeved on the limiting pin. Specifically, when the movable part 21 drives the turning connecting part 1 to move along the fixed assembly 22 until the turning connecting part 1 collides with the limiting deflecting part 221, the turning connecting part 1 continues to rotate, and the bushing 2211 of the limiting deflecting part 221 is in contact with the limiting deflecting part 221. The position guide surface 111 is rollingly connected, and the resistance of the limit deflection member 221 makes the turning connection part 1 rotate. The arrangement of the bushing 2211 can avoid the noise generated by the sliding friction between the limit deflection member 221 and the limit guide surface 111 , and has the advantages of quietness, easy maintenance and good smoothness.

The fixing assembly 22 in this embodiment includes a fixing part 22a and an installation part 22b, and the fixing part 22a and the installation part 22b are fixedly connected. The fixing part 22a and the mounting part 22b can be fixedly connected to the backrest frame by fasteners such as rivets, pins or screws. In some embodiments, the mounting part 22b is integrally formed with the fixing part 22a. In some other embodiments, as shown in FIG. 4 , the installation part 22b may be separately provided from the fixing part 22a, and fixed on the backrest respectively. In this embodiment, the limiting and deflecting member 221 is disposed on the installation portion 22b.

Specifically, as shown in Figure 3, the fixed part 22a is provided with a guide rail groove body 222, and the movable part 21 is provided with a sliding groove body 211 matched with the guide rail groove body 222, and the sliding groove body 211 is slidably connected with the guide rail groove body 222. . In this embodiment, the guide rail groove body 222 fits and slides with the sliding groove body 211 . In some embodiments, the guide rail groove body 22 is also provided with a rolling body and an embedded frame to make the sliding groove body 211 slide smoothly. Body contact, the friction force in the power transmission process is reduced by rolling, and the power transmission efficiency, guiding accuracy and wear resistance of the moving part 21 relative to the fixed component 22 are improved, making the movement more convenient and stable.

Specifically, the movable part 21 is provided with a lift connector 212 , one end of the lift connector 212 is hinged to the flip connector 1 , and the other end of the lift connector 212 is used to connect with the lift rod 3 . In some embodiments, the lifting link 212 can be integrally formed with the movable part 21 . In some other embodiments, the lifting connecting member 212 may also be fixedly connected to the movable member 21 by means of fasteners such as screws, bolts, rivets or welding. In this embodiment, one end of the lifting connector 212 is rotationally connected with the flipping connector 1 through a rotating member, and the other end of the lifting connector 212 is provided with a bending connection part, which is connected with the lifting rod 3 through the bending connection part, and the lifting rod 3 is used for Connect and drive the movable part 21 to move.

Specifically, the turning adjustment mechanism further includes an elastic return member 6 , one end of which is connected to the turning connecting member 1 , and the other end is used to connect to the movable member 21 . In this embodiment, the elastic return member 6 is connected to the lift connecting member 212 of the movable member 21 . In some embodiments, the elastic return member 6 can be a spring. The elastic recovery part maintains a certain elastic recovery force between the turning connection part 1 and the lifting connection part 212 . When the turning connector 1 is driven to rotate and retract, because of the elastic force of the elastic recovery member 6, the recovery force of the turning connector is smaller than the recovery force generated by the driving mechanism directly driving the lifting rod and the movable member. The setting of the elastic recovery part makes the clamping force of the hand or objects clamped by the headrest board greatly reduced during the process of turning the connector to drive the headrest board to recover, and because of the elastic force of the elastic recovery part, the headrest board can be easily pulled to expand The gap between the headrest board and the backrest frame takes out the clamped object, thereby playing the role of anti-clamping.

This embodiment also provides a headrest turning device, as shown in FIGS. 4 and 5 , which includes the above-mentioned turning adjustment mechanism, lifting rod 3 and driving mechanism 5 . The lifting rod 3 is used to connect the movable part 21 and the driving mechanism 5 . In this embodiment, the driving mechanism 5 drives the elevating rod 3 to drive the movable part 21 to a maximum lifting distance of 100mm-170mm, and the maximum adjustment angle of the movable part 21 to push the turning connector 1 while lifting is 40°-70°. Preferably, the maximum sliding distance of the movable member 21 may be 130mm-170mm. In this embodiment, the maximum sliding distance of the movable part relative to the fixed assembly can be 100mm, 110mm, 130mm, 150mm, 160mm or 170mm, and the maximum adjustment angle of the flip connector 1 can be 40°, 45°, 50°, 55°, 60° ° or 70°. In this embodiment, the sliding distance of the movable part 21 relative to the fixed assembly 22 is increased, so that the lifting distance of the headrest board is increased, and the height and height conversion of the sofa backrest is more obvious. The angle adjustment of the turning connector 1 is increased, so that the angle adjustment range of the sofa headrest is larger. In this embodiment, the backrest of the sofa can not only adjust the angle of the headrest through the turning device of the headrest, but also realize the conversion between height and height of the backrest.

Specifically, in some embodiments, as shown in FIG. 4 , the headrest turning device includes a set of lifting components 2, and the two ends of the lifting rod 3 are respectively connected to the lifting connecting piece 212, and the lifting connecting piece 212 at one end passes through the movable part. 21 drives to move up and down. In some other embodiments, as shown in FIG. 5 , the headrest turning device includes two sets of lifting assemblies 2 which are arranged oppositely. The setting of two sets of lifting components makes the lifting movement more stable. Lifting rod 3 is connected between two groups of lifting assemblies, and lifting rod 3 is used for being connected with the output end of driving mechanism 5.

The turning adjustment mechanism of this embodiment also includes a fixed rod 4 , the two ends of the fixed rod 4 are respectively connected with the fixing components 22 on both sides, and the middle part of the fixed rod 4 is used for connecting with the driving mechanism 5 . In some embodiments, the vertical distance from the fixing rod 4 to the bottom end of the fixing assembly 22 is 300mm-400mm. Preferably, it may be 300mm, 320mm, 350mm, 380mm or 400mm. In this embodiment, the vertical distance from the fixing rod 4 to the bottom end of the fixing assembly 22 is 350 mm. Compared with the traditional headrest support, the overall height of the headrest turning device of the present application is lower, so it can be used for a shorter sofa backrest, and because its height is adjustable, the headrest turning device of this embodiment can adjust the sofa backrest height, increased backrest functionality and comfort.

Specifically, the driving mechanism 5 includes a driving motor 51 , a driving rail 52 and a slider 53 , the slider 53 is used to connect with the lifting rod 3 , and the driving motor 51 is used to drive the slider 53 to drive the lifting rod 3 to move along the driving rail 52 . In this embodiment, the driving mechanism 5 is a slider motor, and the driving motor 51 end of the driving mechanism 5 can be connected to the fixed rod 4 or connected to the top frame of the backrest through a motor connector. In some embodiments, the drive mechanism 5 can also be a linear drive mechanism such as a linear push rod motor, a drive cylinder, a hydraulic cylinder, etc., which can drive the elevating rod to move up and down. The fixed end of the driving mechanism can be connected with the fixed rod 4 or the top frame of the back frame, and the linear output end of the driving mechanism is connected with the elevating rod 3 .

Specifically, in some embodiments, the slider 53 is directly fixedly connected to the middle of the lifting rod 3 . In some other embodiments, the lifting rod 3 is connected to the slider 53 through the slider connector 31 , the slider connector 31 is fixedly connected to the lifting rod 3 , and the slider 53 is hinged or fixedly connected to the slider connector 31 . In this embodiment, the slider 53 drives the lifting components on both sides through the lifting rod 3, so that the synchronous stability of the lifting components on both sides is better, and the linear motion direction of the drive motor drives the slider is consistent with the lifting direction of the lifting components.

This embodiment also provides a headrest bracket, as shown in Figures 6 and 7, including a headrest board 7, a backrest frame 8 and a headrest overturning device, the headrest board 7 is used for the overturning connector 1 of the headrest overturning device To connect, adjust the angle of the headrest, the headrest overturning device is connected with the installation side plate 81 of the backrest frame 8 through the fixing assembly 22 . Specifically, the two fixing components 22 are symmetrically installed on the inner sides of the two installation side plates 81 . As shown in FIG. 9 , in some embodiments, the width of the installation side plate 81 may be 50mm-70mm. Preferably, the maximum width of the installation side plate can be 50mm, 55mm, 60mm, 65mm, 68mm or 70mm. Compared with the traditional sofa backrest, this embodiment uses the lifting movement of the lifting component to drive the rotation of the flip connector to adjust the angle of the headrest board. The space occupied by the lifting component is small, so the width of the side panel can be designed to be narrower. The thickness of the sofa backrest frame is thinner, which reduces the volume of the backrest, improves the aesthetic appearance of the sofa, and can realize the design of an ultra-thin sofa.

In some implementations, the headrest board 7 of this embodiment may include a hinged first adjustment board and a second adjustment board, and the first adjustment board can rotate relative to the second adjustment board. Specifically, in practical applications, the first adjusting plate is fixedly connected to the turning connector, the second adjusting plate can rotate relative to the first adjusting plate, and the second adjusting plate allows the user’s head to be slightly tilted back during the adjustment process. Keep a proper curvature between the head and neck and relax the cervical spine. A limiting component for limiting the rotation angle of the first adjustment plate and the second adjustment plate may be arranged to limit the maximum rotation angle of the second adjustment plate.

The adjustment steps of the headrest board in this embodiment: the driving mechanism 5 drives the elevating rod 3 to move, and the elevating rod 3 drives the movable part 21 to slide upward relative to the fixed assembly 22, thereby driving the flip connector 1 and the headrest board 7 to move upward. After the limit part 11 of the connector 1 contacts with the limit deflector 221 arranged at one end of the fixed assembly 22, based on the force that the movable part 21 drives the overturn connector 1 to continue to move upward and the limitation of the overturn connector by the limit deflector 221 The resistance of the position makes the turning connector 1 drive the headrest board to rotate and adjust to one side of the backrest frame. The elastic recovery force between the flip connector 1 and the movable part 21 is maintained by the elastic recovery part 6, so that the flip connector 1 can be retracted smoothly with the movable part 21. In the case of an object in the headrest board, the elastic return part 6 can be relied on The elastic force expands the gap between the headrest board and the backrest frame, thus playing the role of anti-pinch.

In this embodiment, the lifting assembly drives the turning connector to lift and lower to realize switching between high and low backrests of the sofa. The sliding and lifting assembly cooperates with the limit deflection part to rotate the flip connecting part, realizing the angle adjustment of the sofa headrest. The resistance of the limiting deflection member enables the deflection of the flipping connecting member to have a simple structure, uniform rotation speed, and stable rotational movement, and the number of manufacturing and installation steps is reduced, which effectively reduces the cost. An elastic return member 6 is arranged between the flip connector 1 and the lift connector 212. When the flip connector 1 is driven to rotate and retract, the elastic force of the elastic return member 6 can easily pull the headrest board and expand the headrest board and the backrest frame. The gap between them acts as an anti-pinch.

Example 2

As shown in FIG. 8 , the lifting assembly 2 of the headrest bracket in the second embodiment is different from that in the first embodiment. The difference between the lifting assembly 2 in Embodiment 2 and Embodiment 1 is that the movable part 21 is provided with a guide chute 213, and the fixed assembly 22 is provided with a sliding member 224 that matches the guide chute 213. When the movable part 21 slides relative to the fixed assembly 22 , the guide chute 213 is slidably connected with the sliding part 224 . In Embodiment 2, the sliding member 224 can be a sliding pin, at least two sliding pins are fixed on the fixed assembly 22, the sliding pin is installed in the guide chute 213, and the guiding chute 213 is slidably connected with the sliding pin so that the movable member 21 Can slide relative to the fixed assembly 22 . In practical applications, the vertical movement of the movable part 21 relative to the fixed assembly 22 includes but not limited to the vertical movement of the movable part relative to the fixed assembly through chute sliding, threaded rotation structure, sliding sleeve, push rod or slide rail sliding.

Specifically, in this embodiment, the movable part 21 is hinged to one end of the flip connector 1, and the other end of the flip connector 1 is connected to the headrest board 7, and the movable part 21 drives the flip connector 1 and the headrest board 7 to move along the fixed assembly 22. . A lifting connection portion 214 is provided between the two ends of the movable member 21 , and the lifting connection portion 214 is used for connecting with the lifting rod 3 . Specifically, the middle part of the movable part 21 is provided with a lifting connection part 214 that is bent inwardly. 21 slides.

In this embodiment, the driving motor 51 drives the sliding block 53 to drive the elevating rod 3 to slide along the driving guide rail 52, and the sliding block 53 can be articulated with the elevating rod 3 by means of a bolt connection, which is convenient for installation. The linear motion direction of the drive motor driving the slider is the same as or different from the motion direction in which the guide chute and the sliding piece cooperate to slide in the lifting assembly.

The flip adjustment mechanism of the present application realizes the switching of the high and low backrest of the sofa and the angle adjustment of the sofa headrest through the cooperation of the sliding lifting assembly and the limit deflection member. Compared with the headrest structure using a complex link mechanism for angle adjustment, the present application has simple structure, light and stable movement, fewer manufacturing and installation steps, and greatly reduces space and cost requirements. An elastic recovery part is arranged between the turning connection part and the movable part, through which the turning connection part can be recovered smoothly and has an anti-pinch function. The turning adjustment mechanism of the present application is small in size and can be applied to the angle of the backrest of a thin sofa and the adjustment of the headrest.

The above are the preferred embodiments of the present invention, and it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications are also considered as the present invention. protection scope of the invention.

Claims

A flip adjustment mechanism, characterized in that it includes a flip connector (1) and a lift assembly (2), the lift assembly (2) includes a movable part (21) and a fixed assembly (22), the flip connector ( 1) Used for rotational connection with the movable part (21);

A limiting deflector (221) is arranged on the fixing assembly (22), and a limiting part (11) matched with the limiting deflecting member (221) is arranged on the turning connector (1), and the The movable part (21) is used to drive the flip connecting part (1) to move relative to the fixed assembly (22), and when the limiting part (11) contacts the limiting deflection part (221), The movable part (21) continues to push to make the turning connecting part (1) rotate relative to the fixed assembly (22).
The overturn adjustment mechanism according to claim 1, characterized in that, the limit part (11) includes a limit guide surface (111), during the rotation process of the overturn connector (1), the The limit guide surface (111) moves relative to the limit deflector (221).
The overturn adjustment mechanism according to claim 1, characterized in that, one end of the movable part (21) connected to the overturn connector (1) is provided with a limiter (23), and the limiter ( 23) It is used to cooperate with the bottom surface of the turning connecting part (1) to limit the rotation angle of the turning connecting part (1).
The flip adjustment mechanism according to claim 1, characterized in that, the limiting deflector (221) is a limiting pin, and a bushing (2211) is provided on the limiting pin.
A flip adjustment mechanism according to claim 1, characterized in that, the fixing assembly (22) comprises a fixing part (22a) and a mounting part (22b), and the fixing part (22a) and the mounting part ( 22b) Integral molding, fixed connection or separate arrangement, the limiting deflector (221) is arranged on the installation part (22b).
A flip adjustment mechanism according to claim 5, characterized in that, the fixed part (22a) is provided with a guide rail groove (222), and the movable part (21) is provided with the guide rail groove ( 222) A matching sliding groove body (211), the sliding groove body (211) is slidingly connected with the guide rail groove body (222).
The flip adjustment mechanism according to claim 6, characterized in that, the movable part (21) includes a lift connector (212), and one end of the lift connector (212) is connected to the flip connector (1) Hinged, the other end of the lifting connector (212) is used to connect with the lifting rod (3).
The overturn adjustment mechanism according to claim 1, characterized in that, the movable part (21) is provided with a guide chute (213), and the fixed assembly (22) is provided with a (213) Slider (224) for sliding connection.
A flip adjustment mechanism according to claim 8, characterized in that, a lifting connection part (214) is provided between the two ends of the movable part (21), and the lifting connection part (214) is used to communicate with Lifting rod (3) is connected.
The overturn adjustment mechanism according to claim 1, characterized in that it further comprises an elastic return member (6), one end of the elastic return member (6) is connected to the overturn connector (1), and the elastic return The other end of the piece (6) is used to connect with the movable piece (21).
A headrest turning device, characterized in that it comprises a turning link (1), a lifting assembly (2), a lifting rod (3) and a drive mechanism (5), and the lifting assembly (2) includes a movable part (21) and a fixed assembly (22), the flip connecting piece (1) is used for rotational connection with the movable piece (21);

A limiting deflector (221) is arranged on the fixing assembly (22), and a limiting part (11) matched with the limiting deflecting member (221) is arranged on the turning connector (1), and the The movable part (21) is used to drive the flip connecting part (1) to move relative to the fixed assembly (22), and when the limiting part (11) contacts the limiting deflection part (221), The movable part (21) continues to push so that the flip connecting part (1) rotates relative to the fixed assembly (22);

The lifting rod (3) is used for connecting with the movable part (21), and the middle part of the lifting rod (3) is used for connecting with the output end of the driving mechanism (5).
The headrest turning device according to claim 11, characterized in that the driving mechanism (5) drives the lifting rod (3) to drive the movable part (21) to a maximum lifting distance of 100mm-170mm, When the movable part (21) is raised and lowered, the maximum adjustment angle for pushing the turning connecting part (1) is 40°-70°.
The headrest turning device according to claim 11, further comprising a fixed rod (4), the two ends of the fixed rod (4) are respectively connected to the fixed components (22) on both sides, the The middle part of the fixing rod (4) is used to connect with the driving mechanism (5), and the vertical distance from the fixing rod (4) to the bottom end of the fixing assembly (22) is 300mm-400mm.
A headrest turning device according to claim 11, characterized in that, the driving mechanism (5) includes a driving motor (51), a driving guide rail (52) and a slider (53), and the slider (53 ) is used to connect with the lifting rod (3), and the driving motor (51) is used to drive the slider (53) to drive the lifting rod (3) to slide along the driving guide rail (52).
A headrest bracket, characterized in that it comprises a headrest board (7), a backrest frame (8) and the headrest turning device according to any one of claims 11-14, the headrest board (7) is used for It is connected with the turning connector (1), the headrest turning device is connected with the installation side plate (81) of the backrest frame (8) through the fixing assembly (22), and the installation side plate (81) The width is 50mm-70mm.
A headrest bracket according to claim 15, characterized in that, the headrest board (7) includes a hinged first adjustment board and a second adjustment board, and the first adjustment board can be adjusted relative to the first adjustment board. The two adjustment plates rotate.