Foaming headrest assembly of automobile

Abstract

The invention discloses an automobile foaming headrest assembly, relates to the technical field of automobile headrests, and aims to solve the technical problems of low safety, low comfort and the like of the automobile headrests. Comprising a seat backrest with a safety structure, a seat headrest is arranged at the top of the seat backrest, and a springback mechanism, an adjusting assembly, a supporting assembly and a massage assembly are arranged in the seat headrest. The air leakage cylinder, the transmission cylinder and the expansion sleeve which are in a transverse linear array can axially rotate to switch a horizontal parallel mode and an axial expansion mode, when the air leakage cylinder, the transmission cylinder and the expansion sleeve are horizontally parallel, the head exerts pressure to enable the expansion sleeve to be compressed, expanded and mutually extruded, and the air leakage cylinder, the transmission cylinder and the expansion sleeve can be self-adaptively shaped to be attached to the head, disperse pressure, absorb energy in a grading mode and limit displacement during collision. Kneading massage can be realized through dynamic pressure; during axial expansion, the expansion sleeve wraps the afterbrain to form a linear supporting belt, pressure is uniformly dispersed, and the risk of injury to the afterbrain after collision is reduced; an elastic structure is arranged in the headrest, so that deformation of the headrest can be prevented, and driving comfort and safety are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of automotive headrests, and more specifically, to an automotive foam headrest assembly. Background Art

[0002] With the upgrading of the automotive consumer market, users' requirements for the in-vehicle riding experience are increasing day by day. As a component that directly contacts the human head and neck, the headrest needs to have the ability to fit the human curve, dynamic support, and breathable heat dissipation to relieve the fatigue of long-time driving or riding. Currently, most automotive headrests use fixed-shaped foam materials, which are difficult to fit the head curves of different drivers and passengers. During long-distance driving or riding, due to uneven pressure distribution in the contact area between the head and the headrest, local compression is likely to occur, causing neck fatigue and discomfort, and unable to provide precise and comfortable support for the head. In automotive collision accidents, especially in rear-end or side collisions, the traditional headrest energy absorption method is single, making it difficult to effectively limit the abnormal displacement of the head. At the same time, the targeted protection of the back of the head by the headrest is weak, unable to fully disperse the collision impact force, increasing the risk of head injury, and difficult to meet the increasingly stringent automotive safety regulations. Moreover, during long-term use of the automotive headrest, the foam material bears the acting force and is prone to problems such as deformation, affecting the use effect. In view of this, we propose an automotive foam headrest assembly. Summary of the Invention

[0003] The purpose of the present invention is to provide an automotive foam headrest assembly to solve the technical problems such as the lack of safety and comfort of automotive headrests.

[0004] To solve the above technical problems, the present invention provides the following technical solution: An automotive foam headrest assembly includes a seat back with a safety structure, a seat headrest arranged at the top of the seat back, a rebound mechanism, an adjustment component, a support component, and a massage component arranged inside the seat headrest. The rebound mechanism includes two groups of a plurality of air leakage cylinders, transmission cylinders, and expansion sleeves arranged in a horizontal linear array and capable of rotating axially towards or away from each other. The transmission cylinder is movably sleeved on the surface of the air leakage cylinder, and the expansion sleeve is movably sleeved on the surface of the air leakage cylinder. A guide rod is fixedly connected inside each transmission cylinder, and the guide rod is inserted into the air leakage cylinder. An air pressure chamber is formed between each guide rod, air leakage cylinder, and expansion sleeve. The two groups of a plurality of the transmission cylinders and expansion sleeves arranged in a horizontal linear array rotate axially towards or away from each other, causing the two groups of a plurality of expansion sleeves to axially expand or be horizontally parallel. When they are horizontally parallel, the head applies a force to the transmission cylinder, causing a plurality of expansion sleeves to compress and expand and squeeze each other, capable of self-adaptively shaping to precisely fit the head curve, dispersing pressure, and filling the support blind area. When axially expanded, it can accurately wrap the arc contour of the back of the head, forming a linear support belt to evenly disperse pressure. In a vehicle collision, it can reduce the risk of injury to the back of the head. The present invention can axially rotate and switch between the horizontal parallel mode and the axially expanded mode through two groups of laterally linear arrays of air leakage cylinders, transmission cylinders, and expansion sleeves. When in the horizontal parallel mode, when the head applies pressure, the expansion sleeves are compressed and expanded and squeeze each other, which can adaptively shape and fit the head and disperse pressure, absorb energy in stages and limit displacement during a collision, and can also perform kneading massage through dynamic pressure. When axially expanded, the expansion sleeves wrap the back of the head to form a linear support belt, evenly dispersing pressure and reducing the risk of injury to the back of the head during a collision. This design integrates the functions of adaptive support, collision protection, and massage, improving the comfort and safety of driving and riding and adapting to the needs of multiple scenarios.

[0005] Preferably, the rebound mechanism further includes a plurality of bottom plates, and the plurality of bottom plates are fixedly connected in a square array to the inner wall on the right side of the seat headrest, and a load-bearing plate is hinged to one side of each bottom plate.

[0006] Preferably, a plurality of the air leakage cylinders are fixedly connected to one side of the load-bearing plate, and a slider is fixedly connected to the surface of each end of the air leakage cylinder in an annular array, and the slider is slidably connected to the inner part of the chute on the transmission cylinder.

[0007] Preferably, both ends of the expansion sleeve are in close contact between the transmission cylinder and the load-bearing plate, and a contact piece is hinged to each end of the transmission cylinder.

[0008] Preferably, the adjustment assembly includes a plurality of movable rings, and the plurality of movable rings are movably sleeved on the surface of the transmission cylinder. Two bending rods are rotatably connected to the inner walls on both sides of the seat headrest in a symmetrical structure, and the bending rods are hinged to the movable rings.

[0009] Preferably, handles are fixedly connected to both ends of one of the bending rods, and gear cylinders are fixedly connected to both ends of each bending rod, and two vertically opposite gear cylinders are meshed and connected.

[0010] Preferably, the support assembly includes a plurality of bending rods, and the plurality of bending rods are fixedly connected in a linear array to the inner wall on the right side of the seat headrest. A curved surface is arranged on one side of each bending rod, and the curved surface is in movable contact with the inner wall on the left side of the seat headrest. A slot is opened at one end of each bending rod.

[0011] Preferably, a plurality of support rods are arranged in a linear array on the inner wall on the right side of the seat headrest. An arc surface is arranged on one side of each support rod, and each support rod is inserted into the corresponding slot of the vertical shaft. In the present invention, the bending rods and the support rods of the support assembly are inserted into each other through the slots to form an arc-shaped arch surface, which automatically adjusts the support structure when the headrest is pressed for a long time, avoids the deformation and collapse of the stress surface, maintains the soft touch and support performance of the headrest, and extends the service life.

[0012] Preferably, the massage assembly includes a plurality of valve cylinders, and the plurality of valve cylinders are all movably sleeved inside the holes on the contact piece. Moreover, for the contact piece, a valve piece is fixedly connected to the inner wall of each valve cylinder, and a retaining piece is fixedly connected to the inside of each hole on the contact piece, and the valve piece and the retaining piece are hermetically adapted.

[0013] Preferably, two first springs are symmetrically and movably sleeved on the surface of the strut of each valve cylinder, and the first springs are fixedly connected to the contact piece. Through the double-chamber design of the contact piece and the valve cylinder structure in the massage assembly of the present invention, when pressure is applied to the head, gas flow is realized through the communication of the chambers, generating a kneading massage effect on the head and neck, relieving the fatigue caused by long-term driving. At the same time, the dynamic pressure feedback brought by the air pressure change can stimulate blood circulation and improve wakefulness.

[0014] Compared with the prior art, the beneficial effects of the present invention are: 1. The present invention can axially rotate and switch between the horizontal parallel mode and the axial expansion mode through two groups of horizontally linear arrays of air leakage cylinders, transmission cylinders and expansion sleeves. When in the horizontal parallel mode, when pressure is applied to the head, the expansion sleeves are compressed and expanded and squeeze each other, which can adaptively shape and fit the head, disperse pressure, absorb energy in stages and limit displacement during collisions, and can also achieve kneading massage through dynamic pressure; when in the axial expansion mode, the expansion sleeves wrap around the back of the head to form a linear support belt, evenly dispersing pressure and reducing the risk of head injury in the back of the head during collisions; and by setting an elastic structure inside it, it can prevent the deformation of the headrest, improve the driving and riding comfort and safety, and adapt to the needs of multiple scenarios.

[0015] 2. In the present invention, the curved rod and the support rod of the support assembly are inserted into each other through the slots to form an arc-shaped arch surface, which automatically adjusts the support structure when the headrest is pressed for a long time, avoids the deformation and collapse of the stress surface, maintains the soft touch and support performance of the headrest, and extends the service life.

[0016] 3. Through the double-chamber design of the contact piece and the valve cylinder structure in the massage assembly of the present invention, when pressure is applied to the head, gas flow is realized through the communication of the chambers, generating a kneading massage effect on the head and neck, relieving the fatigue caused by long-term driving. At the same time, the dynamic pressure feedback brought by the air pressure change can stimulate blood circulation and improve wakefulness. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a three-dimensional structural schematic diagram of the present invention.

[0018] Figure 2 is a schematic sectional view of the seat headrest structure of the present invention.

[0019] Figure 3 is a three-dimensional structural schematic diagram of the rebound mechanism of the present invention.

[0020] Figure 4This is a schematic cross-sectional view of the contact piece structure of the present invention to show the three-dimensional structure of the massage component.

[0021] Figure 5 This is a schematic three-dimensional exploded view of the massage component of the present invention.

[0022] Figure 6 This is a schematic enlarged three-dimensional view of the rebound mechanism of the present invention.

[0023] Figure 7 This is an exploded view of the rebound mechanism of the present invention.

[0024] Figure 8 This is a schematic three-dimensional view of the adjustment component of the present invention.

[0025] Figure 9 This is a schematic three-dimensional view of the support component of the present invention.

[0026] Figure 10 This is a schematic view of the structure of the drive cylinder in the axial unfolded state of use of the present invention.

[0027] Figure 11 This is a schematic view of the structure of the drive cylinder in the horizontal state of use of the present invention.

[0028] Explanation of reference numerals in the figure: 1, seat backrest; 2, seat headrest; 3, rebound mechanism; 31, bottom plate; 32, load-bearing plate; 33, air leakage cylinder; 331, slider; 34, drive cylinder; 341, guide rod; 35, expansion sleeve; 36, contact piece; 4, adjustment component; 41, movable ring; 42, bent rod; 421, handle; 43, gear cylinder; 5, support component; 51, bent rod; 511, curved surface; 512, slot; 52, support rod; 521, arc surface; 6, massage component; 61, valve cylinder; 611, valve piece; 62, baffle; 63, first spring. Detailed implementation manners

[0029] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0030] In the present invention, unless otherwise clearly specified and defined, terms such as "installation", "connection", "linkage", "fixation", etc. shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] As Figures 1-4 , Figures 6-7 and Figures 10-11 shown, an automotive foamed headrest assembly according to the present invention includes a seat backrest 1 with a safety structure, a seat headrest 2 arranged at the top of the seat backrest 1, a rebound mechanism 3, an adjustment assembly 4, a support assembly 5, and a massage assembly 6 arranged inside the seat headrest 2.

[0032] It should be noted that the safety structure on the seat backrest 1 is composed of components such as a safety buckle and an adjustment slide rail, and the seat backrest 1 is composed of a seat frame, a filler, leather, etc., which will not be described in detail here.

[0033] The rebound mechanism 3 includes a plurality of bottom plates 31, and the plurality of bottom plates 31 are fixedly connected in a square array to the inner wall on the right side of the seat headrest 2. One side of each bottom plate 31 is hinged with a load-bearing plate 32, and one side of each load-bearing plate 32 is fixedly connected with an air leakage cylinder 33. The end surface of each air leakage cylinder 33 is fixedly connected with sliders 331 in an annular array. A transmission cylinder 34 is slidably sleeved on the surface of each air leakage cylinder 33, and the sliders 331 are slidably connected inside the chute on the transmission cylinder 34. A guide rod 341 is fixedly sleeved inside each transmission cylinder 34, and the guide rod 341 is slidably sleeved inside the air leakage cylinder 33. An expansion sleeve 35 is movably sleeved on the surface of each air leakage cylinder 33, and the end of the expansion sleeve 35 is in close contact with one side of the transmission cylinder 34. Moreover, an air pressure chamber is formed among the guide rod 341, the air leakage cylinder 33, and the expansion sleeve 35. Each end of the transmission cylinder 34 is hinged with a contact piece 36 with two chambers.

[0034] It should be noted that the expansion sleeve 35 and the contact piece 36 are made of rubber material and have elastic deformation characteristics, capable of functions such as expansion and contraction.

[0035] Specifically, a number of drive cylinders 34 and expansion sleeves 35 of the two groups of horizontal linear arrays can rotate axially towards each other or in opposite axial directions, causing the drive cylinders 34 and expansion sleeves 35 of the two groups of horizontal linear arrays to axially expand or be horizontally parallel. When they are horizontally parallel, a force is applied to the drive cylinder 34 by the head, causing a number of expansion sleeves 35 to compress and expand, which can adaptively shape and precisely fit the head curve, disperse pressure and fill the support blind area. In a vehicle collision, it can absorb energy in stages and limit abnormal displacement of the head, and the dynamic pressure change can apply a kneading pressure to the driver's head. When axially expanded, it can precisely wrap the arc contour of the back of the head, form a linear support belt to evenly disperse pressure, and in a vehicle collision, it can reduce the risk of injury to the back of the head and further reduce the sense of dizziness of the head.

[0036] In the present invention, the air leakage cylinders 33, drive cylinders 34 and expansion sleeves 35 of the two groups of horizontal linear arrays can be axially rotated to switch between the horizontal parallel and axial expansion modes. When horizontally parallel, the head applies pressure to cause the expansion sleeves 35 to compress and expand and squeeze each other, which can adaptively shape and fit the head, disperse pressure, absorb energy in stages and limit displacement during a collision, and can also achieve kneading massage through dynamic pressure. When axially expanded, the expansion sleeves 35 wrap the back of the head to form a linear support belt to evenly disperse pressure and reduce the risk of injury to the back of the head during a collision. And by setting an elastic structure inside it, it can prevent the deformation of the headrest, improve the comfort and safety of driving and riding, and adapt to the needs of multiple scenarios.

[0037] As Figure 8 shown, the adjusting assembly 4 includes a number of movable rings 41, and a number of the movable rings 41 are all movably sleeved on the surface of the drive cylinder 34. Two bending rods 42 are rotatably connected to the inner walls on both sides of the seat headrest 2 in a symmetrical structure, and the bending rods 42 are hinged to the movable rings 41. One of the bending rods 42 is fixedly connected with a handle 421 at both ends, and each bending rod 42 is fixedly connected with a gear cylinder 43 at both ends, and two vertically opposite gear cylinders 43 are meshed and connected.

[0038] Specifically, by manually adjusting the handle 421 and driving through the meshing of two vertically opposite gear cylinders 43, the two bending rods 42 are caused to rotate axially towards each other, and through the movable rings 41, the drive cylinder 34 is in two use states of axial expansion or horizontal parallel.

[0039] When in use, axial rotation unfolds: first turn the handle 421, and the two gear cylinders 43 of the vertical axis mesh and transmit the two bending rods 42 in the opposite direction, and through the movable ring 41, the transmission cylinder 34 rotates in the opposite direction to form an unfolded state; horizontal parallel: by turning the handle 421 in the opposite direction, the two bending rods 42 are rotated through gear transmission, so that they are in a horizontal parallel state; when the transmission cylinder 34 is in a horizontal state: the transmission cylinder 34 is moved to one side by the head pressure, and the guide rod 341 moves inside the leak cylinder 33, so that the gas inside it is transported to the expansion sleeve 35 to expand it, wherein a number of expansion sleeves 35 are formed. Due to the uneven pressure on the head, the expansion sleeves 35 have different expansion states and squeeze each other. The contact pieces 36 can adaptively shape and accurately fit the curve of the head, disperse the pressure and fill the support blind spots. In a car collision, they can absorb energy in stages and limit abnormal displacement of the head. The dynamic pressure change can apply kneading pressure to the driver's head. When the transmission cylinder 34 is deployed, the expansion sleeves 35 are expanded by squeezing, which can accurately wrap the arc contour of the back of the head to form a linear support belt to evenly disperse the pressure. In a vehicle collision, the risk of injury to the back of the head can be reduced and the feeling of dizziness can be further reduced.

[0040] like Figure 9 As shown, the support assembly 5 includes a plurality of bent rods 51, and the plurality of bent rods 51 are fixedly connected to the right inner wall of the seat headrest 2 in a linear array, a curved surface 511 is arranged on one side of each of the bent rods 51, and the curved surface 511 is in active contact with the left inner wall of the seat headrest 2, a slot 512 is opened at one end of each of the bent rods 51, and a plurality of support rods 52 are arranged on the right inner wall of the seat headrest 2 in a linear array, a curved surface 521 is arranged on one side of each of the support rods 52, and each of the support rods 52 is inserted into the slot 512 corresponding to the vertical axis.

[0041] Specifically, when the head applies force to the headrest for a long time, one end of the support rod 52 slides in the slot 512, causing the bending rod 51 and the support rod 52 to form a complete arc-shaped arch surface, supporting the shape of the headrest and preventing the force-bearing surface of the headrest from deforming due to long-term use, thereby affecting its softness during use.

[0042] When in use, during the compression process, one end of the support rod 52 moves inside the slot 512, so that the support rod 52 and the curved rod 51 form a complete arc-shaped arch surface, which supports the headrest and maintains its complete shape.

[0043] The present invention forms an arcuate surface by plugging the bending rod 51 of the support assembly 5 and the support rod 52 through the slot 512. When the headrest is under pressure for a long time, the support structure is automatically adjusted to avoid deformation and collapse of the stress-bearing surface, maintain the soft touch and support performance of the headrest, and extend the service life.

[0044] like Figure 5As shown in the figure, the massage component 6 includes a number of valve cylinders 61. A number of the valve cylinders 61 are all movably sleeved inside the holes on the contact piece 36. And for the contact piece 36, a valve piece 611 is fixedly connected to the inner wall of each valve cylinder 61. A stop piece 62 is fixedly connected inside the hole on each contact piece 36. And the valve piece 611 is hermetically adapted to the stop piece 62. On the surface of the support rod of each valve cylinder 61, two first springs 63 are symmetrically movably sleeved, and the first springs 63 are fixedly connected to the contact piece 36.

[0045] Specifically, when one of the chambers on the contact piece 36 is subjected to a force, the valve cylinder 61 moves to one side, causing the valve piece 611 to move out of the hole in the stop piece 62, so that the two chambers communicate with each other, and local massage of the head can be performed.

[0046] During use, when the head relies for a long time, due to the air pressure of the head on one of the chambers on the contact piece 36, the valve cylinder 61 moves to one side, and the valve piece 611 moves out of the stop piece 62, so that the two chambers communicate with each other, to provide the most comfortable state environment, and the gas flow can massage the head and neck.

[0047] Through the double-chamber design of the contact piece 36 and the structure of the valve cylinder 61 in the massage component 6 of the present invention, when pressure is applied to the head, gas flow is realized through the communication of the chambers, generating a kneading massage effect on the head and neck, relieving the fatigue of long-term driving. At the same time, the dynamic pressure feedback brought by the air pressure change can stimulate blood circulation and improve wakefulness.

[0048] Working principle: This embodiment provides an automotive foam headrest assembly. Axial rotation and deployment: First, rotate the handle 421, and through the meshing transmission of the two gear cylinders 43 on the vertical shaft, the two bending rods 42 rotate in opposite directions, and through the movable ring 41, the transmission cylinder 34 rotates in opposite directions, forming a deployed state; Horizontal parallel: Rotate the handle 421 in the reverse direction, and through gear transmission, the two bending rods 42 rotate, causing them to be in a horizontal parallel state; When the driver's head contacts the headrest, the transmission cylinder 34 is in a horizontal state: when the transmission cylinder 34 is subjected to the head pressure and moves to one side, the guide rod 341 moves inside the air leakage cylinder 33, causing the gas inside it to be transported into the expansion sleeve 35, making it expand. Among them, due to the uneven pressure exerted by the head, several expansion sleeves 35 have different expansion states and squeeze each other. Several contact pieces 36 can adaptively shape and precisely fit the head curve, disperse the pressure and fill the support blind area. Moreover, in a vehicle collision, they can absorb energy in stages and limit the abnormal displacement of the head, and the dynamic pressure change can exert a kneading pressure on the driver's head; at the same time, when the transmission cylinder 34 is unfolded, several expansion sleeves 35 are caused to expand by extrusion, which can precisely wrap the arc contour of the back of the head, form a linear support belt to evenly disperse the pressure, and in a vehicle collision, it can reduce the risk of injury to the back of the head and further reduce the sense of dizziness of the head. During this process, due to the long-term pressure on the headrest, the contact surface deforms. Among them, during the pressure process, one end of the support rod 52 moves inside the slot 512, causing the support rod 52 and the bending rod 51 to form a complete arc-shaped arch surface to support the headrest and maintain its complete shape; when the head relies on it for a long time, by the air pressure of the head on one of the chambers of the contact piece 36, the valve cylinder 61 moves to one side, and the valve piece 611 moves out of the retaining piece 62, making the two chambers communicate, so as to provide the most comfortable state environment, and the gas flow can massage the head and neck.

[0049] The embodiments disclosed in the present invention are preferred embodiments, but not limited thereto. Those of ordinary skill in the art can easily understand the spirit of the present invention based on the above embodiments and make different extensions and changes. However, as long as they do not depart from the spirit of the present invention, they are within the protection scope of the present invention; in addition, it should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

Claims

1. An automotive foam headrest assembly, comprising a seat back with a safety structure, a seat headrest arranged at the top of the seat back, a rebound mechanism, an adjustment assembly, a support assembly and a massage assembly arranged inside the seat headrest, characterized in that, The rebound mechanism includes a number of air leakage cylinders, transmission cylinders, and expansion sleeves that are arranged in two groups in a horizontal linear array and can rotate axially towards or away from each other. The transmission cylinders are movably sleeved on the surface of the air leakage cylinders, and the expansion sleeves are movably sleeved on the surface of the air leakage cylinders. A guide rod is fixedly connected inside each transmission cylinder, and the guide rod is inserted into the air leakage cylinder. An air pressure chamber is formed between each guide rod, air leakage cylinder, and expansion sleeve. A number of the transmission cylinders and expansion sleeves in the two groups arranged in a horizontal linear array rotate axially towards or away from each other, causing a number of expansion sleeves in the two groups arranged in a horizontal linear array to expand axially or be horizontally parallel. When they are horizontally parallel, the head applies a force to the transmission cylinder, causing a number of expansion sleeves to compress and expand and squeeze each other, which can adaptively shape and precisely fit the head curve, disperse pressure, and fill the support blind area. When expanding axially, it can precisely wrap the arc contour of the back of the head, form a linear support belt to evenly disperse pressure, and reduce the risk of injury to the back of the head in a vehicle collision.

2. The automotive foamed headrest assembly according to claim 1, wherein, The rebound mechanism further includes a number of bottom plates, and the number of bottom plates is fixedly connected to the inner wall on the right side of the seat headrest in a square array. A load-bearing plate is hinged to one side of each bottom plate.

3. The automotive foamed headrest assembly according to claim 2, characterized in that, A number of the air leakage cylinders are fixedly connected to one side of the load-bearing plate. A slider is fixedly connected to the surface of each end of the air leakage cylinder in an annular array, and the slider is slidably connected to the inner part of the chute on the transmission cylinder.

4. The automotive foamed headrest assembly according to claim 3, characterized in that, Both ends of the expansion sleeve are in close contact between the transmission cylinder and the load-bearing plate, and a contact piece is hinged to each end of the transmission cylinder.

5. The automotive foamed headrest assembly according to claim 4, characterized in that, The adjustment assembly includes a number of movable rings, and the number of movable rings are all movably sleeved on the surface of the transmission cylinder. Two bending rods are rotatably connected to the inner walls on both sides of the seat headrest in a symmetrical structure, and the bending rods are hinged to the movable rings.

6. The automotive foamed headrest assembly according to claim 5, characterized in that, One of the bending rods is fixedly connected with a handle at both ends respectively. A gear cylinder is fixedly connected to both ends of each bending rod respectively, and two vertically opposite gear cylinders are meshed and connected. Among them, by manually adjusting the handle and driving through the meshing of two vertically opposite gear cylinders, the two bending rods rotate axially towards each other, and through the movable rings, the transmission cylinder is in two use states of expanding axially or being horizontally parallel.

7. The automotive foam headrest assembly according to claim 6, wherein, The support assembly includes a number of bending rods, and the number of bending rods are fixedly connected to the inner wall on the right side of the seat headrest in a linear array. A curved surface is arranged on one side of each bending rod, and the curved surface is in movable contact with the inner wall on the left side of the seat headrest. A slot is opened at one end of each bending rod.

8. The automotive foamed headrest assembly according to claim 7, wherein, A number of support rods are arranged in a linear array on the inner wall on the right side of the seat headrest. An arc surface is arranged on one side of each support rod, and each support rod is inserted into the corresponding slot of the vertical shaft. When the head applies a force to the headrest for a long time, one end of the support rod slides in the slot, causing the bending rod and the support rod to form a complete arc-shaped arch surface to support the shape of the headrest.

9. The automotive foamed headrest assembly according to claim 8, wherein, The massage assembly includes a number of valve cylinders, and the number of valve cylinders are all movably sleeved in the holes on the contact piece. And for the contact piece, a valve piece is fixedly connected to the inner wall of each valve cylinder, and a stop piece is fixedly connected to the inside of the hole on each contact piece, and the valve piece is hermetically adapted to the stop piece.

10. The automotive foamed headrest assembly according to claim 9, characterized in that, On the surface of each upper support rod of the valve cylinder, two first springs are movably sleeved in a symmetric structure, and the first springs are fixedly connected to the contact pieces; Among them, when a force acts on one of the chambers on the contact piece, the valve cylinder moves to one side, causing the valve piece to move out of the hole in the baffle, so that the two chambers are communicated, enabling local head massage.

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