CN117017002A

CN117017002A - Headrest hinge and lying tool

Info

Publication number: CN117017002A
Application number: CN202311071578.1A
Authority: CN
Inventors: 陈嘉良; 徐彩红; 陈素玲; 杨辉武
Original assignee: Foshan Gaoming Wanshida Furniture Accessories Co ltd
Current assignee: Foshan Gaoming Wanshida Furniture Accessories Co ltd
Priority date: 2023-08-23
Filing date: 2023-08-23
Publication date: 2023-11-10

Abstract

The application relates to the technical field of furniture, and particularly discloses a headrest hinge and a lying tool. The headrest hinge comprises a first mounting structure, a second mounting structure, a limiting unit, a first connecting plate and a second connecting plate, wherein the first mounting structure comprises a first mounting seat and a first mounting plate which is connected to the first mounting seat in a sliding manner, and the first mounting seat is used for being connected with a lying tool frame body. The second mounting structure comprises a second mounting plate and a second mounting seat, one end of the second mounting plate is rotationally connected with one end of the first mounting plate, the second mounting seat is used for mounting a headrest, and the second mounting seat is slidably connected to the second mounting plate. The limiting unit is used for locking the second mounting plate to fix an included angle between the first mounting plate and the second mounting plate after rotation. The first connecting plate will promote the second mount pad and do the motion of keeping away from the second mounting panel, and the second connecting plate will promote the first mount pad and do the motion of keeping away from first mount pad, and headrest lifting is to suitable height for general build user's head can be supported by the headrest well.

Description

Headrest hinge and lying tool

Technical Field

The application relates to the technical field of furniture, in particular to a headrest hinge and a lying tool.

Background

Along with the social development, multifunctional furniture such as functional sofas and the like have been put into thousands of households. The headrest of function sofa and some function beds is adjustable headrest, and the user can be according to the different inclination of self custom adjustment headrest when using to reach best use experience.

A furniture function hinge is disclosed in the publication CN 216364432U, which can be adjusted by a user to bend the hinge to different angles so that a headrest mounted on the hinge can be adjusted to a proper angle. However, the mounting seat of the hinge has a limited stroke capable of sliding relative to the mounting plate, and the height of the headrest cannot be greatly raised while adjusting the angle of the headrest.

The physique of the european person is generally larger than that of the asian person, and when the european person adjusts the angle of the headrest through the hinge, the headrest may only support the neck of the european user but not the hindbrain portion of the user, and the user experience is poor. On the basis of using the hinge, if the headrest is required to be supported to the back brain of a user, the mounting plate can only be prolonged so that the sliding stroke of the mounting seat is increased, and the purpose of lifting the headrest is achieved. However, after extending the length of the mounting plate, the size of the sofa headrest needs to be correspondingly increased to wrap the mounting plate, and the size of the sofa needs to be correspondingly increased to adapt to the size of the headrest after being increased.

Accordingly, the prior art is still in need of improvement and development.

Disclosure of Invention

The application discloses a headrest hinge and a lying tool, which are used for solving the problem that the existing headrest hinge cannot raise the height of a headrest in the rotation process of the headrest.

In order to achieve the above purpose, the application adopts the following technical scheme:

a headrest hinge, comprising:

a first mounting structure comprising:

the first mounting seat is used for being mounted on a frame body of the lying tool; and

the first mounting plate is connected to the first mounting seat in a sliding manner;

a second mounting structure comprising:

one end of the second mounting plate is rotationally connected with one end of the second mounting plate; and

the second mounting seat is used for mounting a headrest of the lying tool and is connected to the second mounting plate in a sliding manner;

the limiting unit is arranged at the joint of the first mounting plate and the second mounting plate and is used for locking the second mounting plate after the second mounting plate rotates relative to the first mounting plate, so that an included angle between the first mounting plate and the second mounting plate is fixed;

the first connecting plate is rotationally connected with the first mounting plate at one end, rotationally connected with the second mounting seat at the other end, and used for pushing the second mounting seat to slide relative to the second mounting plate when the second mounting plate rotates relative to the first mounting plate;

the second connecting plate, the one end of second connecting plate with first mount pad rotates to be connected, the other end of second connecting plate with the second mounting panel rotates to be connected, the second mounting panel is used for promoting when the second mounting panel for first mounting panel rotates first mount pad slides for first mounting panel.

Preferably, the limiting unit includes:

the first support plate comprises a first support plate, and the first support plate is fixedly connected to one end of the first mounting plate;

the second support plate comprises a second support plate, and the second support plate is fixedly connected to one end of the second mounting plate;

the first support plate and the second support plate are both rotationally connected with the rotating shaft;

the first support plate structure is matched with the second support plate structure to limit the second mounting plate.

Preferably, the first support plate comprises a first part and a second part which are arranged in opposite directions, the first part and the second part are respectively and fixedly connected to two sides of the first mounting plate, the second support plate is arranged between the first part and the second part, the first part is rotationally connected with the rotating shaft, and the second part is rotationally connected with the rotating shaft;

the first part is provided with a first bulge, one end of the first connecting plate is rotationally connected with the first bulge, and the other end of the first connecting plate is rotationally connected with the second mounting seat.

Preferably, the headrest hinge further comprises a third support plate, the third support plate is rotationally connected with the rotating shaft, a second protrusion and a third protrusion are arranged on the third support plate, the second protrusion is connected with the second mounting plate, one end of the second connecting plate is rotationally connected with the first mounting seat, and the other end of the second connecting plate is rotationally connected with the third protrusion.

Preferably, the limiting unit further comprises a first cover plate and a second cover plate, wherein the first cover plate is used for closing one side of the first portion, the second cover plate is used for closing one side of the second portion, and the second cover plate is arranged between the third support plate and the second portion.

Preferably, a first bump is arranged on the first cover plate, a first notch is arranged on the first part, and the first bump is used for being clamped in the first notch;

the second cover plate is provided with a second lug, the second part is provided with a second notch, and the second lug is used for being clamped in the second notch.

Preferably, the first connecting plate and the second connecting plate are arc-shaped plates.

Preferably, the first mounting seat is an L-shaped plate, one side of the first mounting seat is fixedly connected with the frame body of the lying tool, and the other side of the first mounting seat is in sliding connection with the first mounting plate;

the first mounting seat is fixedly connected with a first sliding block, a long hole is formed in the first mounting plate, and the first sliding block is connected to the inner wall of the long hole in a sliding mode.

Preferably, the second mounting seat is an L-shaped plate, one side of the second mounting seat is fixedly connected with a headrest of the lying tool, and the other side of the second mounting seat is in sliding connection with the first mounting plate;

the first mounting seat is fixedly connected with a second sliding block, the first mounting plate is provided with a long hole, and the second sliding block is connected to the inner wall of the long hole in a sliding mode.

The application also discloses a lying tool which comprises the headrest hinge.

Compared with the prior art, the application has the beneficial effects that:

the application provides a headrest hinge which comprises a first mounting structure and a second mounting structure, wherein the first mounting structure comprises a first mounting plate and a first mounting seat, the first mounting plate is slidably connected to the first mounting seat, the first mounting seat is used for being mounted on a frame body of a lying tool, the second mounting structure comprises a second mounting plate and a second mounting seat, the second mounting seat is slidably connected to the second mounting plate, the first mounting plate is rotatably connected with the second mounting plate, and the second mounting seat is used for mounting a headrest of the lying tool. The headrest hinge further comprises a first connecting plate and a second connecting plate, one end of the first connecting plate is rotationally connected with the first mounting plate, and the other end of the first connecting plate is rotationally connected with the second mounting seat. One end of the second connecting plate is rotationally connected with the first mounting seat, and the other end of the second connecting plate is rotationally connected with the second mounting plate. When the second mounting plate rotates relative to the first mounting plate, the first connecting plate and the second connecting plate are driven to move, at the moment, the first connecting plate drives the second mounting seat to move away from the second mounting plate, and the second connecting plate drives the first mounting plate to move away from the first mounting seat. The junction at first mounting panel and second mounting panel still is provided with limit structure, and limit structure is used for locking second mounting panel after the second mounting panel rotates for contained angle between first mounting panel and the second mounting panel is fixed. After setting up second connecting plate and first mount pad, first mounting panel can rise, and then drives the headrest height and rise for lie the size of the headrest of utensil just can realize rising under the condition that does not change, in order to adapt to general physique crowd's demand.

In addition, the application also discloses a lying tool which comprises the headrest hinge and has all the advantages of the headrest hinge.

Drawings

FIG. 1 is a schematic view of a first construction of a headrest hinge according to an embodiment of the present application;

FIG. 2 is a schematic view of a second construction of a headrest hinge according to an embodiment of the present application;

FIG. 3 is an exploded view of a headrest hinge according to an embodiment of the present application;

FIG. 4 is a schematic view of a first configuration of a headrest hinge according to an embodiment of the present application deployed at a first angle;

FIG. 5 is a schematic view of a second configuration of a headrest hinge according to an embodiment of the present application deployed at a first angle;

FIG. 6 is a schematic view of a first configuration of a headrest hinge according to an embodiment of the present application deployed at a second angle;

FIG. 7 is a schematic view of a second configuration of a headrest hinge according to an embodiment of the present application deployed at a second angle;

fig. 8 is a front view showing an initial state of a headrest hinge according to an embodiment of the present application;

FIG. 9 is a front view of a headrest hinge according to an embodiment of the present application, after being unfolded at a first angle;

fig. 10 is a front view of a headrest hinge according to an embodiment of the present application after being unfolded at a second angle.

Description of main reference numerals: 10-first mounting structure, 11-first mounting seat, 111-first slider, 12-first mounting plate, 20-second mounting structure, 21-second mounting plate, 211-second slider, 22-second mounting seat, 30-limit unit, 31-first support plate structure, 311-first support plate, 312-first portion, 3121-first protrusion, 3122-first notch, 313-second portion, 3131-second notch, 32-second support plate structure, 321-second support plate, 33-spindle, 34-first cover plate, 341-first protrusion, 35-second cover plate, 351-second protrusion, 40-first connection plate, 50-second connection plate, 60-third support plate, 61-second protrusion, 62-third protrusion, 70-long hole.

Detailed Description

The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

In the present application, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate an azimuth or a positional relationship based on that shown in the drawings. These terms are only used to better describe the present application and its embodiments and are not intended to limit the scope of the indicated devices, elements or components to the particular orientations or to configure and operate in the particular orientations.

Also, some of the terms described above may be used to indicate other meanings in addition to orientation or positional relationships, for example, the term "upper" may also be used to indicate some sort of attachment or connection in some cases. The specific meaning of these terms in the present application will be understood by those of ordinary skill in the art according to the specific circumstances.

Furthermore, the terms "mounted," "configured," "provided," "connected," and "connected" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; may be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements, or components. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.

Furthermore, the terms "first," "second," and the like, are used primarily to distinguish between different devices, elements, or components (the particular species and configurations may be the same or different), and are not used to indicate or imply the relative importance and number of devices, elements, or components indicated. Unless otherwise indicated, the meaning of "a plurality" is two or more.

The technical scheme of the application will be further described with reference to the examples and the accompanying drawings.

Examples

With the development of society, more comfortable functional sofas are more widely purchased by users. Functional sofas typically include an adjustable tilt angle headrest that can support the user's hindbrain at different tilt angles to allow the user to obtain a better use experience.

A furniture function hinge is disclosed in the publication CN 216364432U, which can be adjusted by the user so that the hinge is folded to a suitable angle to support the user's hindbrain. However, the hinge has a limited range of travel in which the mount can slide relative to the mounting plate, and a limited height of the headrest lifting while adjusting the angle of the headrest.

In the European and American market, because the physique of the user is large, namely the length of the trunk of the European and American user is generally longer than that of the trunk of the Asian user, when the European and American user sits on the lying tool, the height of the head of the European and American user is higher than that of the Asian user, and at the moment, if the hinge such as in a bulletin number is still used, the height of the headrest is limited, the headrest can only be supported to the neck of the user, the hindbrain of the user can not be supported, and the use experience of the user is poor.

On the basis of still using the hinge, if European and American users want to obtain a better use experience, firstly, the width of the headrest is widened, so that the headrest can support the forebrain of the users when the headrest is lifted to the same height. However, in order to coordinate the lying tool, the main body portion of the lying tool likewise needs to be widened so that the lying tool is wholly coordinated. And secondly, heightening the height of the backrest of the lying tool so that the headrest can support the hindbrain of a user when rising to the same height. However, both the above methods require changing the size of the frame of the lying tool, and the cost of the leather and the frame used in the lying tool is greatly increased.

Accordingly, in the present application, there is provided a headrest hinge, referring to fig. 1 and 2, the headrest hinge includes a first mounting structure 10 and a second mounting structure 20, the first mounting structure 10 includes a first mounting seat 11 and a first mounting plate 12, the first mounting seat 11 is used for being mounted on a frame body of a lying tool, and the first mounting plate 12 is slidably connected to the first mounting seat 11. The second mounting structure 20 includes a second mounting plate 21 and a second mounting seat 22, one end of the second mounting plate 21 is rotatably connected with one end of the first mounting plate 12, the second mounting seat 22 is used for mounting a headrest of the lying tool, and the second mounting seat 22 is slidably connected to the second mounting plate 21. The headrest hinge further comprises a limiting unit 30, wherein the limiting unit 30 is arranged at the joint of the first mounting plate 12 and the second mounting plate 21, and the limiting unit 30 is used for locking the second mounting plate 21 after the second mounting plate 21 rotates, so that an included angle between the first mounting plate 12 and the second mounting plate 21 is fixed. The headrest hinge further comprises a first connecting plate 40 and a second connecting plate 50, wherein one end of the first connecting plate 40 is rotatably connected with the first mounting plate 12, the other end of the first connecting plate 40 is rotatably connected with the second mounting seat 22, one end of the second connecting plate 50 is rotatably connected with the second mounting plate 21, and the other end of the second connecting plate 50 is rotatably connected with the second mounting seat 22. When the second mounting plate 21 rotates relative to the first mounting plate 12, the first connecting plate 40 will push the second mounting seat 22 to move away from the second mounting plate 21 under the driving of the second mounting plate 21, and the second connecting plate 50 will push the first mounting plate 12 to move away from the first mounting seat 11 due to the fixing of the first mounting seat 11. At this time, the first mounting plate 12 and the second mounting seat 22 are simultaneously far away from the first mounting seat 11, so that the headrest mounted on the second mounting seat 22 can be raised to a proper height, and the head of a general user can be well supported by the headrest.

It should be understood that the structure of the limiting unit 30 in the present application is similar to the structure and principle of the angle locking mechanism in the application documents with publication numbers CN 215820338U and CN 216364432U, so that the detailed parts of the limiting unit 30 are not shown in the drawings of the present application, and only the main plate of the limiting unit 30 is used for illustration.

Referring to fig. 3, in an embodiment of the present application, the limiting unit 30 includes a first support plate 311 structure 31 and a second support plate 321 structure 32, and the first support plate 311 structure 31 and the second support plate 321 structure 32 are used to cooperate to lock the second mounting plate 21. The first support plate 311 structure 31 includes a first support plate 311, the first support plate 311 is fixedly connected to one end of the first mounting plate 12, the second support plate 321 structure 32 includes a second support plate 321, and the second support plate 321 is fixedly connected to one end of the second mounting plate 21. The first support plate 311 and the second support plate 321 are rotatably connected with the rotating shaft 33, and the first support plate 311 is tightly attached to the second support plate 321. As disclosed in the above application, not shown in the drawings, the limiting unit 30 further comprises a locking piece and a snap spring, an arc tooth slot is arranged on the first support plate 311, a plurality of locking teeth are arranged in the arc tooth slot, an arc locking groove is arranged on the second support plate 321, and the first clamping plate structure and the second clamping plate structure can realize locking of the second mounting plate 21 through arc matching of the locking piece, the snap spring, the arc tooth slot and the arc locking groove.

In one embodiment of the present application, the rotating shaft 33 is a linear cylindrical rod.

The first support plate 311 includes a first portion 312 and a second portion 313 disposed opposite to each other, where the first portion 312 and the second portion 313 are fixedly connected to two sides of the first mounting plate 12, the second support plate 321 is disposed between the first portion 312 and the second portion 313, and the first portion 312 is rotatably connected to the rotating shaft 33, and the second portion 313 is also rotatably connected to the rotating shaft 33. The second support plate 321 is clamped by the first part 312 and the second part 313, so that the second support rod can be kept stable in the rotating process.

Referring to fig. 2 and 3, a first protrusion 3121 is provided on the first portion 312, one end of the first connection plate 40 is rotatably connected to the first protrusion 3121, and the other end of the first connection plate 40 is rotatably connected to the second mounting seat 22. By providing first projection 3121, first coupling plate 40 is coupled to first mounting plate 12 such that it does not interfere with the rotation of second mounting plate 21.

Referring to fig. 3, the hinge structure further includes a third support plate 60, the third support plate 60 is rotatably connected with the rotating shaft 33, and a second protrusion 61 and a third protrusion 62 are disposed on the third support plate 60, one end of the second mounting plate 21 is rotatably connected with the second protrusion 61, fixedly connected with the second protrusion 61, or bolted with the second protrusion, one end of the second connecting plate 50 is rotatably connected with one end of the first mounting seat 11, and the other end of the second connecting plate 50 is rotatably connected with the third protrusion 62.

In an embodiment of the present application, as can be seen from comparing fig. 1, 4 and 6, when the second mounting plate 21 rotates, the second mounting plate 21 drives the third support plate 60 to rotate, the clockwise rotating third support plate 60 presses the second connecting plate 50 downward, and the original sliding of the first mounting seat 11 relative to the first mounting plate 12 is converted into the upward sliding of the first mounting plate 12 relative to the first mounting seat 11 due to the fixed connection of the first mounting seat 11 to the frame body of the lying tool, and the height of the headrest mounted on the second mounting seat 22 is increased after the upward sliding of the first mounting plate 12.

Similarly, in comparison with fig. 2, 5 and 7, when the second mounting plate 21 rotates relative to the first mounting plate 12, the other end of the first link plate 40 moves to a position above the one end of the first link plate 40 without changing the relative positional relationship between the first protrusion 3121 and the limiting structure, the first link plate 40 is incompressible, and during rotation of the second mounting plate 21, the first link plate 40 will push the second mounting plate 22 to move away from the second mounting plate 21, i.e., the first mounting plate 12 pushes the headrest such that the height of the headrest increases.

Referring to fig. 8 and 10, a distance a between one end of the second mounting seat 22 and the other end of the second mounting plate 21 is denoted in fig. 8, and a distance B between one end of the second mounting plate 21 and the other end of the second mounting plate 21 is denoted in fig. 10. The distance C between the other end of the first mounting plate 12 and one end of the first mounting seat 11 is labeled in fig. 8, and the distance D between the other end of the first mounting plate 12 and one end of the first mounting seat 11 is labeled in fig. 10.

Upon rotation of the second mounting plate 21 as compared to the first mounting plate 12, the form of the headrest hinge is changed from the state of fig. 8 to fig. 9 and then to the form of fig. 10.

When using a furniture hinge as disclosed in the publication CN 216364432U or a furniture hinge as disclosed in the publication CN215820353U, the headrest can only be raised by a+b while the angle is changed, and the raised height of the headrest cannot be adapted to the needs of the general population. In the application, the headrest can be used for lifting the height of A+B+C+D, and the headrest can adapt to the requirements of the general crowd, so that the head of the general user can be well supported. Meanwhile, when the hinge is used, the original frame structure and the original leather size of the lying tool basically do not need to be modified, so that the production cost is greatly reduced.

Of course, in one embodiment of the present application, the headrest hinge of the present application can also be used on a armrest.

In an embodiment of the present application, referring to fig. 3, the limiting unit 30 further includes a first cover 34 and a second cover 35, the first cover 34 is used for closing a side of the first portion 312 facing away from the second support 321, the second cover 35 is used for closing a side of the second portion 313 facing away from the second support 321, and the second cover 35 is disposed between the third support 60 and the second portion 313. After the first cover plate 34 and the second cover plate 35 are arranged, the locking block and the snap spring at the limiting unit 30 are not easy to interfere with each other, and the limiting unit 30 can work stably.

Of course, in an embodiment of the present application, in order to prevent the first cover 34 and the first portion 312 from sliding relatively during the rotation of the second mounting plate 21, a first protrusion 341 is disposed on the first cover 34, a first notch 3122 is disposed on the first portion 312, and the first protrusion 341 is configured to be clamped in the first notch 3122.

In an embodiment of the present application, in order to prevent the second cover plate 35 and the second portion 313 from sliding relatively during the rotation of the second mounting plate 21, the second cover plate 35 is provided with a second protrusion 351, the second portion 313 is provided with a second notch 3131, and the second protrusion 351 is configured to be clamped in the second notch 3131.

In an embodiment of the present application, in order to avoid interference of the second mounting plate 21 by the first connection plate 40 or the second connection plate 50 during rotation, both the first connection plate 40 and the second connection plate 50 are provided as arc plates.

In an embodiment of the present application, referring to fig. 1 and 2, the first mounting seat 11 is an "L" plate, one side of the first mounting seat 11 is fixedly connected with the frame body of the lying tool, and a through hole is formed in the first mounting seat 11 at one side fixedly connected with the lying tool, and a screw or a bolt for fixing the frame body of the lying tool is inserted into the through hole.

The opposite side of first mount pad 11 and first mounting panel 12 butt to be provided with first slider 111 on the first mount pad 11, be provided with the slot hole on the first mounting panel 12, first slider 111 sliding connection is on the inner wall of first slot hole. Of course, at least two first sliding blocks 111 are provided, and the two first sliding blocks 111 enable the first mounting plate 12 to slide relative to the first mounting seat 11 only, so that the first mounting plate 12 is prevented from rotating relative to the first mounting seat 11 during movement.

In an embodiment of the present application, referring to fig. 1 and 2, the second mounting seat 22 is an "L" plate, one side of the second mounting seat 22 is fixedly connected to the headrest, and a through hole is provided in the second mounting seat 22 on one side fixedly connected to the headrest, and a screw or a bolt for fixing the frame body of the lying tool is inserted into the through hole.

The other side of the second mounting seat 22 is abutted against the second mounting plate 21, a second sliding block 211 is arranged on the second mounting seat 22, a long hole is arranged on the second mounting plate 21, and the second sliding block 211 is connected to the inner wall of the second long hole in a sliding mode. Of course, at least two first sliding blocks 111 are provided, and the two first sliding blocks 111 enable the first mounting plate 12 to slide relative to the first mounting seat 11 only, so that the first mounting plate 12 is prevented from rotating relative to the first mounting seat 11 during movement.

The application also discloses a lying tool which comprises the headrest hinge and has all the advantages of the headrest hinge.

The lying tool may be a sofa, a bed, a couch or other furniture that can be used for lying.

It will be understood that equivalents and modifications will occur to those skilled in the art based on the present application and its spirit, and all such modifications and substitutions are intended to be included within the scope of the present application.

Claims

1. Headrest hinge, its characterized in that includes:

a first mounting structure comprising:

a second mounting structure comprising:

2. The headrest hinge according to claim 1, wherein the stopper unit includes:

3. The headrest hinge according to claim 2, wherein the first stay includes a first portion and a second portion disposed opposite to each other, the first portion and the second portion being fixedly connected to both sides of the first mounting plate, respectively, the second stay being disposed between the first portion and the second portion, the first portion being rotatably connected to the rotation shaft, and the second portion being rotatably connected to the rotation shaft;

4. The headrest hinge according to claim 3, further comprising a third support plate rotatably connected to the rotation shaft, wherein a second protrusion and a third protrusion are provided on the third support plate, the second protrusion is connected to the second mounting plate, one end of the second connection plate is rotatably connected to the first mounting seat, and the other end of the second connection plate is rotatably connected to the third protrusion.

5. The headrest hinge according to claim 4, wherein the limiting unit further comprises a first cover plate for closing one side of the first portion and a second cover plate for closing one side of the second portion, the second cover plate being disposed between the third bracket and the second portion.

6. The headrest hinge according to claim 5, wherein the first cover plate is provided with a first protrusion, the first portion is provided with a first notch, and the first protrusion is configured to be snapped into the first notch;

7. The headrest hinge according to any one of claims 1-6, wherein the first and second connection plates are arcuate plates.

8. The headrest hinge according to claim 1, wherein the first mounting seat is an "L" shaped plate, one side of the first mounting seat is fixedly connected with a frame body of the lying tool, and the other side of the first mounting seat is slidably connected with the first mounting plate;

9. The headrest hinge according to claim 1, wherein the second mounting seat is an "L" shaped plate, one side of the second mounting seat is fixedly connected with a headrest of a lying tool, and the other side of the second mounting seat is slidably connected with the first mounting plate;

10. A lying furniture comprising a headrest hinge as claimed in any one of claims 1 to 9.