Two-degree-of-freedom movable headrest

Abstract

The utility model relates to a two-degree-of-freedom movable headrest. The technical problems that due to the fact that existing parts are numerous, installation is troublesome, the buffering effect is poor, and accurate positioning cannot be achieved are solved. Comprising a headrest crank arm movably arranged between a headrest stand column and a headrest frame, the two ends of the headrest crank arm are each provided with two rotating installation parts, a rotating shaft installation notch is formed between the rotating installation parts, and the upper end of the headrest stand column and the inner side of the headrest frame are each provided with a rotating shaft; and the two ends of the rotating shaft are movably connected with the two rotating mounting parts through rotating connecting structures correspondingly, so that the rotating shaft is rotationally arranged in the rotating shaft mounting notch, soft damping pieces are arranged at the two ends of the rotating shaft correspondingly, and the soft damping pieces make contact with one sides of the rotating mounting parts. The headrest has the advantages that the headrest stand column and the headrest frame are connected with the headrest crank arm through the connecting rotating shaft, the second arc-shaped block of the connecting rotating shaft is matched with the arc-shaped notch of the connecting shaft, and therefore the connecting shaft is connected with the rotating installation part, the structure is simple, and installation is convenient and fast.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of seat headrest, specifically relates to a double freedom movable headrest. BACKGROUND

[0002] With the continuous improvement of people's attention to health and comfort, users hope that the chair headrest can better fit the head and neck curve. The headrest on the market can generally only set a single rotating structure to adjust the angle of the headrest due to the fixed installation position, but cannot meet the body shape and use demand of different users. At the same time, the rotating structure of the adjustable headrest is complex, the numerous parts lead to installation trouble, and faults are prone to occur.

[0003] In order to solve the problems existing in the prior art, people have carried out long-term exploration and put forward various kinds of solutions. For example, the Chinese patent document discloses a headrest [202021113953.6], which comprises a headrest piece, a connecting piece and a base piece. The first end of the connecting piece is hinged to the headrest piece through a headrest hinge assembly. The second end of the connecting piece is hinged to the base piece through an angle-adjustable base hinge assembly. The base piece is also provided with a buckle part connected with the chair buckle.

[0004] The above-mentioned scheme solves the problem of single angle adjustment of the existing headrest to a certain extent and cannot meet the use of different users, but the scheme still has many deficiencies, such as numerous parts leading to installation trouble, poor buffering effect and unable to realize precise positioning. SUMMARY

[0005] The utility model aims at the above-mentioned problem and provides a double freedom movable headrest.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a double freedom movable headrest, which comprises a headrest curved arm movably arranged between a headrest upright and a headrest frame. The two ends of the headrest curved arm are respectively provided with two rotating mounting parts, and a rotating shaft mounting gap is formed between the rotating mounting parts. The upper end of the headrest upright and the inner side of the headrest frame are respectively provided with rotating shafts. The two ends of the rotating shafts are respectively movably connected with the two rotating mounting parts through rotating connection structures, so that the rotating shafts are rotatably arranged in the rotating shaft mounting gap. The two ends of the rotating shafts are respectively provided with soft damping pieces which are circumferentially positioned with the rotating shafts. The soft damping pieces are in contact with the side of the rotating mounting part close to the rotating shaft mounting gap. The rotating shafts and the rotating mounting parts are connected through the rotating connection structures, which is simple in structure and convenient to install. At the same time, the position of the headrest frame can be freely adjusted according to the demand, which improves the practicability. Moreover, the soft damping pieces are installed between the rotating shafts and the rotating mounting parts, which plays a certain buffering role in the adjustment process.

[0007] In the double-degree-of-freedom movable headrest, the soft damping member has a friction surface on one side close to the rotating shaft mounting gap of the rotating mounting part.

[0008] In the double-degree-of-freedom movable headrest, the soft damping member is in the form of a gasket and is made of soft plastic. During adjustment, proper resistance is provided so that the user can feel a certain sense of resistance during adjustment, thereby more accurately controlling the adjustment position, and effectively preventing rebound after adjustment.

[0009] In the double-degree-of-freedom movable headrest, the rotating connection structure includes mounting holes that respectively transversely pass through the rotating mounting part and are in communication with the rotating shaft mounting gap, and a connecting rotating shaft is arranged in the mounting hole through a rotating connection assembly. The soft damping member is located between the rotating shaft and the connecting rotating shaft, and the rotating shaft, the soft damping member, and the connecting rotating shaft are circumferentially positioned relative to each other through a plug-in assembly.

[0010] In the double-degree-of-freedom movable headrest, the plug-in assembly includes a first plug-in assembly arranged between the end of the rotating shaft and the soft damping member, and a second plug-in assembly arranged between the end of the rotating shaft and the connecting rotating shaft.

[0011] In the double-degree-of-freedom movable headrest, the first plug-in assembly includes a plurality of arc-shaped grooves arranged on the end surface of the rotating shaft, the arc-shaped grooves are uniformly distributed in a circumferential direction with the center line of the rotating shaft as the center, the soft damping member has a plurality of first arc-shaped blocks on the side away from the friction surface, the first arc-shaped blocks are plugged into the arc-shaped grooves, and the side of the soft damping member away from the friction surface is arranged in abutment with the end surface of the rotating shaft. The first arc-shaped blocks of the soft damping member are connected with the arc-shaped grooves of the connecting shaft, which can ensure the stability of the soft damping member during adjustment.

[0012] In the double-degree-of-freedom movable headrest, the second plug-in assembly includes a connecting cylinder arranged on the center of the end surface of the rotating shaft and plugged into the soft damping member, the end of the connecting cylinder does not exceed the side of the soft damping member having the friction surface, the connecting cylinder is provided with a plurality of arc-shaped notches corresponding to the arc-shaped grooves, one end of the connecting rotating shaft is provided with a plurality of second arc-shaped blocks corresponding to the arc-shaped notches, and the second arc-shaped blocks and the arc-shaped notches are plugged into each other on the inside of the soft damping member. The arc-shaped notches of the rotating shaft are connected with the second arc-shaped blocks of the connecting rotating shaft, thereby connecting the connecting shaft with the rotating mounting part.

[0013] In the double-freedom movable headrest, the rotating connecting assembly comprises an annular limiting part arranged on the circumferential inner side of the mounting hole near the soft damping part, the circumferential inner side of the annular limiting part is provided with a plurality of arc-shaped limiting blocks, and the adjacent two arc-shaped limiting blocks form an arc-shaped limiting groove; the connecting rotating shaft is coaxially provided with a cylindrical body and a columnar part, the diameter of the cylindrical body is larger than that of the columnar part, the columnar part is rotatably arranged in the inner side of the annular limiting part, and one end of the cylindrical body abuts against one end of the annular limiting part; the second arc-shaped blocks are arranged at one end of the columnar part and are provided with a plurality of arc-shaped rotating parts corresponding to the arc-shaped limiting grooves on the circumferential outer side of the columnar part, the adjacent two arc-shaped rotating parts form an arc-shaped rotating groove, and the arc-shaped rotating parts and the arc-shaped limiting grooves and the arc-shaped limiting blocks and the arc-shaped rotating grooves are rotatably connected, respectively. The arc-shaped rotating groove and the arc-shaped limiting block ensure the adjustment angle range between the headrest column and the headrest curved arm and between the headrest frame and the headrest curved arm.

[0014] In the double-freedom movable headrest, the two rotating shafts are in the form of horizontally arranged columnar structures, one rotating shaft is connected to the connecting seat on the inner side of the headrest frame, and the other rotating shaft is connected to the upper end of the headrest column; the headrest curved arm is in the form of an arc-shaped structure; the mounting holes on the two rotating mounting parts at any one end of the headrest curved arm correspond to each other and are coaxially arranged with the rotating shafts; and the inner side of the rotating shaft mounting notch is provided with arc-shaped grooves matched with the outer side of the rotating shafts.

[0015] In the double-freedom movable headrest, the headrest column is vertically and adjustably provided with a headrest mounting seat on the side close to the headrest frame; and the headrest mounting seat is provided with mounting sockets in a split structure. The headrest mounting seat is connected to the back of the chair through the mounting sockets, and the headrest mounting seat is vertically movable in the headrest column, and the headrest mounting seat and the headrest column are fixed to each other through an elastic fixing assembly; and the user can freely adjust the lifting height of the headrest column according to needs.

[0016] Compared with the prior art, the headrest has the following advantages:

[0017] 1. The headrest column and the headrest frame are connected to the headrest curved arm through the connecting rotating shaft, the second arc-shaped blocks of the connecting rotating shaft are matched with the arc-shaped notches of the connecting shaft, so that the connecting shaft is connected to the rotating mounting part, and the structure is simple and convenient to install.

[0018] 2. The soft damping part is arranged between the connecting shaft and the rotating mounting part, appropriate resistance is provided during adjustment, the user can feel a certain sense of frustration during adjustment, so that the adjustment position can be more accurately controlled, and the loosening phenomenon after adjustment can be effectively prevented.

[0019] 3. The device utilizes the arc-shaped limiting blocks of the rotating mounting part and the arc-shaped rotating grooves of the connecting rotating shaft, ensures the angle rotating range of the headrest, can adapt to the head and neck curves of different users, and provides ideal support. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a structural schematic diagram of the utility model.

[0021] Figure 2 is an exploded view of the structure of the utility model.

[0022] Figure 3 is the headrest curve arm in the utility model. Figure 2 is a structure enlarged view of A in the middle.

[0023] Figure 4 is a side view of the headrest curve arm in the utility model.

[0024] Figure 5 is a structural schematic diagram of the connecting rotating shaft in the utility model.

[0025] Figure 6 is a structural schematic diagram of the soft damping piece in the utility model.

[0026] In the drawing: headrest stand 1, headrest frame 2, connecting seat 21, headrest curve arm 3, rotating mounting part 4, rotating shaft mounting notch 41, arc-shaped recess 42, rotating shaft 5, soft damping piece 51, friction surface 52, rotating connection structure 6, mounting hole 61, connecting rotating shaft 62, cylindrical body 63, columnar part 64, rotating connection assembly 7, annular limiting part 71, arc-shaped limiting block 72, arc-shaped limiting groove 73, arc-shaped rotating part 74, arc-shaped rotating groove 75, plug-in assembly 8, first plug-in assembly 81, second plug-in assembly 82, arc-shaped groove 83, first arc-shaped block 84, connecting cylindrical part 85, arc-shaped notch 86, second arc-shaped block 87, headrest mounting seat 9, mounting bayonet 91. DETAILED DESCRIPTION

[0027] The utility model will be explained in further detail below in combination with the drawings and specific embodiments.

[0028] As Figures 1-6As shown, a two-degree-of-freedom movable headrest comprises a headrest curved arm 3 movably arranged between a headrest column 1 and a headrest frame 2, the headrest curved arm 3 has two rotating mounting portions 4 at two ends respectively, and a rotating shaft mounting gap 41 is formed between the rotating mounting portions 4, the headrest column 1 has a rotating shaft 5 at the upper end and the headrest frame 2 has a rotating shaft 5 at the inner side, the rotating shaft 5 at two ends is movably connected with the two rotating mounting portions 4 through rotating connection structures 6 so that the rotating shaft 5 is movably arranged in the rotating shaft mounting gap 41, and the rotating shaft 5 at two ends is provided with soft damping members 51 which are circumferentially positioned with the rotating shaft 5, and the soft damping members 51 are in contact with the rotating mounting portions 4 close to the side of the rotating shaft mounting gap 41. The rotating shaft 5 is connected with the rotating mounting portions 4 through the rotating connection structures 6, which is simple in structure and convenient to install, and the position of the headrest frame 2 can be freely adjusted according to the needs, which improves the practicability, and the soft damping members 51 are installed between the rotating shaft 5 and the rotating mounting portions 4, which plays a certain buffering role in the adjustment process.

[0029] In combination Figure 1 and Figure 2 As shown, the soft damping members 51 have friction surfaces 52 in contact with the rotating mounting portions 4 close to the side of the rotating shaft mounting gap 41.

[0030] Among them, the soft damping members 51 are in the form of gaskets and are made of soft plastic. In the adjustment process, appropriate resistance is provided, so that the user can feel a certain sense of frustration when adjusting, thereby more accurately controlling the adjustment position, and also effectively preventing rebound phenomenon after adjustment.

[0031] In combination Figure 2 , Figure 4 and Figure 5 As shown, the rotating connection structure 6 comprises mounting holes 61 which are transversely through the rotating mounting portions 4 and are connected with the rotating shaft mounting gap 41, and connecting shafts 62 are arranged in the mounting holes 61 through rotating connection assemblies 7, the soft damping members 51 are located between the rotating shaft 5 and the connecting shafts 62, and the rotating shaft 5, the soft damping members 51 and the connecting shafts 62 are circumferentially positioned through plug-in assemblies 8.

[0032] In combination Figure 3 and Figure 6 As shown, the plug-in assemblies 8 are divided into first plug-in assemblies 81 arranged between the ends of the rotating shaft 5 and the soft damping members 51, and second plug-in assemblies 82 arranged between the ends of the rotating shaft 5 and the connecting shafts 62.

[0033] The first plug-in assembly 81 comprises a plurality of arc-shaped grooves 83 arranged on the end face of the rotating shaft 5, the arc-shaped grooves 83 are uniformly distributed in the circumferential direction with the center line of the rotating shaft 5 as the center, and the soft damping member 51 has a plurality of first arc-shaped blocks 84 corresponding to the arc-shaped grooves 83 on the side away from the friction surface 52, and the first arc-shaped blocks 84 are plugged into the arc-shaped grooves 83 so that the side of the soft damping member 51 away from the friction surface 52 is arranged in abutment with the end face of the rotating shaft 5. The first arc-shaped blocks 84 of the soft damping member 51 are connected with the arc-shaped grooves 83 of the connecting shaft 5, which can ensure the stability of the soft damping member 51 during adjustment.

[0034] Specifically, the second plug-in assembly 82 comprises a connecting barrel portion 85 arranged in the center of the end face of the rotating shaft 5 and plugged into the soft damping member 51, the end of the connecting barrel portion 85 does not exceed the side of the soft damping member 51 with the friction surface 52, the connecting barrel portion 85 is provided with a plurality of arc-shaped notches 86 corresponding to the arc-shaped grooves 83, one end of the connecting rotating shaft 62 has a plurality of second arc-shaped blocks 87 corresponding to the arc-shaped notches 86, and the second arc-shaped blocks 87 and the arc-shaped notches 86 are plugged into each other on the inner side of the soft damping member 51. The arc-shaped notches 86 of the rotating shaft 5 are connected with the second arc-shaped blocks 87 of the connecting rotating shaft 62, so that the connecting shaft 5 is connected with the rotating mounting portion 4.

[0035] Combining Figure 4 and Figure 5 As shown in the figure, the rotating connecting assembly 7 comprises an annular limiting portion 71 arranged on the circumferential inner side of the mounting hole 61 close to the soft damping member 51, the annular limiting portion 71 has a plurality of arc-shaped limiting blocks 72 on the circumferential inner side, an arc-shaped limiting groove 73 is formed between adjacent two arc-shaped limiting blocks 72, the connecting rotating shaft 62 has a coaxially arranged barrel-shaped body 63 and a columnar portion 64, the diameter of the barrel-shaped body 63 is larger than that of the columnar portion 64, the columnar portion 64 is rotatably arranged on the inner side of the annular limiting portion 71, and one end of the barrel-shaped body 63 abuts against one end of the annular limiting portion 71, the second arc-shaped blocks 87 are arranged at one end of the columnar portion 64 and have a plurality of arc-shaped rotating portions 74 corresponding to the arc-shaped limiting grooves 73 on the circumferential outer side of the columnar portion 64, an arc-shaped rotating groove 75 is formed between adjacent two arc-shaped rotating portions 74, and the arc-shaped rotating portions 74 and the arc-shaped limiting grooves 73 and the arc-shaped limiting blocks 72 and the arc-shaped rotating grooves 75 are rotatably connected respectively. The arc-shaped rotating groove 75 and the arc-shaped limiting block 72 ensure the adjustment angle range between the headrest stand 1 and the headrest curved arm 3 and between the headrest frame 2 and the headrest curved arm 3.

[0036] As Figure 2As shown, the two rotating shafts 5 are in the shape of a column and one of the rotating shafts 5 is connected to the inner side of the headrest frame 2 through the connecting seat 21, and the other rotating shaft 5 is connected to the upper end of the headrest column 1, the headrest curved arm 3 is in the shape of an arch, the mounting holes 61 on the two rotating mounting portions 4 at either end of the headrest curved arm 3 are corresponding to each other and coaxially arranged with the rotating shaft 5, and the inner side of the rotating shaft mounting gap 41 has an arc-shaped groove 42 matching the outer side of the rotating shaft 5.

[0037] In combination Figure 1 And Figure 2 As shown, the headrest column 1 is vertically adjustable and has a headrest mounting seat 9 near the side of the headrest frame 2, and the headrest mounting seat 9 has a mounting bayonet 91 in a split structure. The headrest mounting seat 9 is connected to the backrest through the mounting bayonet 91, and the headrest mounting seat 9 is vertically movable in the headrest column 1, and the headrest mounting seat 9 and the headrest column 1 are fixed to each other through an elastic fixing assembly, and the user can freely adjust the height of the headrest column 1 according to the needs.

[0038] The principle of the embodiment is:

[0039] The headrest column 1 is connected to the backrest through the headrest mounting seat 9, and the headrest column 1 can be adjusted in height through the headrest mounting seat 9, the headrest column 1 and the headrest frame 2 are connected through the headrest curved arm 3, the rotating shaft 5 of the headrest column 1 is connected to the rotating mounting portion 4 at one end of the headrest curved arm 3, and the rotating shaft 5 of the headrest frame 2 is connected to the rotating mounting portion 4 at the other end of the headrest curved arm 3, and a soft damping member 51 is installed between the rotating shaft 5 and the rotating mounting portion 4, which can provide appropriate resistance to facilitate accurate control of the adjustment position, the first arc-shaped block 84 of the soft damping member 51 is inserted into the arc-shaped groove 83 of the rotating shaft 5, the connecting rotating shaft 62 is installed in the mounting hole 61, the second arc-shaped block 87 of the connecting rotating shaft 62 is inserted into the arc-shaped gap 86 of the rotating shaft 5, and the arc-shaped limiting block 72 of the rotating mounting portion 4 is arranged in the arc-shaped rotating groove 75 of the connecting rotating shaft 62, so that the headrest curved arm 3 can be adjusted within a certain range.

[0040] The specific embodiments described herein are merely illustrative of the spirit of the present application. Those skilled in the art to which the present application belongs can make various modifications or supplements to the described specific embodiments or use similar ways to replace them, without deviating from the spirit of the present application or exceeding the scope defined by the appended claims.

[0041] Although the headrest post 1, the headrest frame 2, the connecting seat 21, the headrest curved arm 3, the rotary mounting portion 4, the rotary shaft mounting notch 41, the arc-shaped recess 42, the rotary shaft 5, the soft damping piece 51, the friction surface 52, the rotary connecting structure 6, the mounting hole 61, the connecting rotary shaft 62, the cylindrical body 63, the columnar portion 64, the rotary connecting assembly 7, the annular limiting portion 71, the arc-shaped limiting block 72, the arc-shaped limiting groove 73, the arc-shaped rotating portion 74, the arc-shaped rotating groove 75, the plug-in assembly 8, the first plug-in assembly 81, the second plug-in assembly 82, the arc-shaped groove 83, the first arc-shaped block 84, the connecting cylindrical portion 85, the arc-shaped notch 86, the second arc-shaped block 87, the headrest mounting seat 9, the mounting bayonet 91 and the like are used more in the text, but the possibility of using other terms is not excluded. Using these terms is only for more convenient description and explanation of the essence of the utility model; it is contrary to the spirit of the utility model to interpret them as any kind of additional limitation.

Claims

1. A dual-degree-of-freedom movable headrest, comprising a headrest arm (3) movably disposed between a headrest column (1) and a headrest frame (2), characterized in that, The headrest arm (3) has two rotating mounting parts (4) at both ends, and a pivot mounting notch (41) is formed between the rotating mounting parts (4). The upper end of the headrest column (1) and the inner side of the headrest frame (2) have rotating shafts (5). The two ends of the rotating shafts (5) are movably connected to the two rotating mounting parts (4) through a rotating connection structure (6), so that the rotating shafts (5) are rotatably set in the pivot mounting notch (41). The two ends of the rotating shafts (5) are respectively provided with soft damping parts (51) that are circumferentially positioned with the rotating shafts (5). The soft damping parts (51) are in contact with the side of the rotating mounting part (4) near the pivot mounting notch (41).

2. The dual-degree-of-freedom movable headrest according to claim 1, characterized in that, The soft damping member (51) has a friction surface (52) on one side that contacts the side of the rotating mounting part (4) near the shaft mounting notch (41).

3. A dual-degree-of-freedom movable headrest according to claim 1, characterized in that, The soft damping element (51) is in the shape of a gasket and is made of soft plastic.

4. A dual-degree-of-freedom movable headrest according to claim 2 or 3, characterized in that, The rotating connection structure (6) includes mounting holes (61) that pass through the rotating mounting part (4) laterally and are connected to the rotating shaft mounting notch (41). A connecting rotating shaft (62) is provided in the mounting hole (61) through the rotating connection assembly (7). The soft damping element (51) is located between the rotating shaft (5) and the connecting rotating shaft (62). The rotating shaft (5), the soft damping element (51) and the connecting rotating shaft (62) are circumferentially positioned with each other through the plug-in assembly (8).

5. A dual-degree-of-freedom movable headrest according to claim 4, characterized in that, The plug-in assembly (8) is divided into a first plug-in assembly (81) disposed between the end of the rotating shaft (5) and the soft damping member (51) and a second plug-in assembly (82) disposed between the end of the rotating shaft (5) and the connecting shaft (62).

6. A dual-degree-of-freedom movable headrest according to claim 5, characterized in that, The first plug-in assembly (81) includes several arc-shaped grooves (83) disposed on the end face of the rotating shaft (5). The arc-shaped grooves (83) are evenly distributed circumferentially with the center line of the rotating shaft (5) as the center. On the side of the soft damping member (51) away from the friction surface (52), there are several first arc-shaped blocks (84) corresponding to the arc-shaped grooves (83). The first arc-shaped blocks (84) are inserted into the arc-shaped grooves (83) so that the side of the soft damping member (51) away from the friction surface (52) abuts against the end face of the rotating shaft (5).

7. A dual-degree-of-freedom movable headrest according to claim 6, characterized in that, The second plug-in assembly (82) includes a connecting cylinder (85) disposed at the center of the end face of the rotating shaft (5) and inserted into the soft damping member (51). The end of the connecting cylinder (85) does not extend beyond the side of the soft damping member (51) with the friction surface (52). The connecting cylinder (85) is provided with a plurality of arc-shaped notches (86) corresponding one-to-one with the arc-shaped grooves (83). One end of the connecting rotating shaft (62) is provided with a plurality of second arc-shaped blocks (87) corresponding one-to-one with the arc-shaped notches (86), and the second arc-shaped blocks (87) and the arc-shaped notches (86) are inserted into each other inside the soft damping member (51).

8. A dual-degree-of-freedom movable headrest according to claim 7, characterized in that, The rotating connection assembly (7) includes an annular limiting part (71) disposed on the inner circumferential side of the mounting hole (61) near the soft damping member (51). The annular limiting part (71) has a plurality of arc-shaped limiting blocks (72) on its inner circumferential side, and an arc-shaped limiting groove (73) is formed between two adjacent arc-shaped limiting blocks (72). The connecting shaft (62) has a cylindrical body (63) and a columnar part (64) arranged coaxially. The diameter of the cylindrical body (63) is larger than that of the columnar part (64). The columnar part (64) is rotatably disposed on the annular limiting part. The inner side of the positioning part (71) and one end of the cylindrical body (63) abuts against one end of the annular limiting part (71). The second arc-shaped block (87) is respectively disposed at one end of the columnar part (64) and has a plurality of arc-shaped rotating parts (74) corresponding one-to-one with the arc-shaped limiting groove (73) on the outer side of the columnar part (64). An arc-shaped rotating groove (75) is formed between two adjacent arc-shaped rotating parts (74), and the arc-shaped rotating parts (74) and the arc-shaped limiting groove (73) and the arc-shaped limiting block (72) and the arc-shaped rotating groove (75) are respectively rotatably connected.

9. A dual-degree-of-freedom movable headrest according to claim 7, characterized in that, Both rotating shafts (5) are horizontally arranged columnar structures, and the side of one rotating shaft (5) is connected to the connecting seat (21) inside the headrest frame (2), while the side of the remaining rotating shaft (5) is connected to the upper end of the headrest column (1). The headrest curved arm (3) has an arched structure. The mounting holes (61) on the two rotating mounting parts (4) at any end of the headrest curved arm (3) correspond to each other and are coaxially arranged with the rotating shaft (5). The inner side of the rotating shaft mounting notch (41) has an arc-shaped groove (42) that matches the outer side of the rotating shaft (5).

10. A dual-degree-of-freedom movable headrest according to claim 1, characterized in that, The headrest column (1) is vertically adjustable with a headrest mounting base (9) on the side near the headrest frame (2), and the headrest mounting base (9) has a split mounting slot (91).

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