Seat headrest and seat

Abstract

The seat headrest comprises a front cover assembly and a rear cover assembly, the rear cover assembly comprises a rear cover and a guide rail which are integrally formed through injection molding, and the rear cover can be fixedly connected to a seat; the front cover assembly comprises a foaming headrest, a front cover and a sliding rod, the front cover and the sliding rod are integrally formed in an injection molding mode, the sliding rod is connected with the guide rail in a sliding mode, a clamping structure is arranged between the sliding rod and the guide rail, and the clamping structure can limit relative movement between the sliding rod and the guide rail. The foaming headrest is formed on the front cover in a foaming mode. The seat headrest has high dimensional precision, the assembly difference between the sliding rod and the guide rail can be eliminated through the injection molding integrated forming technology, the clamping structure is arranged between the sliding rod and the guide rail, the clamping structure can limit relative movement between the sliding rod and the guide rail, and stepless adjustment between the guide rail and the sliding block is achieved.

Description

Technical Field

[0001] The present application relates to the field of automobile seats, and in particular to a seat headrest and a seat. Background Art

[0002] As people's living standards improve, their requirements for vehicle ride comfort are also increasing. Traditional vehicle seats are equipped with adjustable headrests for supporting the head, which can meet the needs of passengers of different heights. The adjustment mechanism of traditional adjustable headrests usually adopts split aluminum alloy guide rails and nylon sliders. Among them, the aluminum alloy guide rails are two aluminum alloy guide rails independently installed on the seat back frame, and four nylon sliders that cooperate with the guide rails are assembled on the headrest frame to achieve graded adjustment of the headrest height. However, the technical solutions for adjusting the height of the headrest in the prior art rely on the assembly of multiple components. The split guide rails need to be fixed to the back frame separately, which has large installation errors and easily leads to uneven sliding resistance between the guide rails and the sliders. In addition, multiple nylon sliders are installed in a dispersed manner on the headrest frame, resulting in increased cumulative tolerances that affect smoothness, poor slider matching stability, low assembly accuracy of the guide rails and sliders, complex processes and high difficulty in precision control. The adjustable headrests in the prior art also require an additional metal frame for the headrest, which increases material and processing costs, resulting in increased redundant costs for the seat headrest.

[0003] Application Contents

[0004] In response to the problems existing in the above-mentioned prior art, the present application provides a seat headrest, and the specific technical solution is as follows:

[0005] In one aspect, the present application provides a seat headrest, comprising:

[0006] A rear cover assembly, comprising an injection-molded integrally formed rear cover and a guide rail, wherein the rear cover can be fixedly connected to the seat;

[0007] The front cover assembly includes a foam headrest, a front cover and a sliding rod. The front cover and the sliding rod are injection-molded as one piece. The sliding rod is slidably connected to the guide rail. A locking structure is provided between the sliding rod and the guide rail. The locking structure can limit the relative movement between the sliding rod and the guide rail. The foam headrest is foamed and formed on the front cover.

[0008] In a possible implementation manner, the material of the rear cover and the guide rail includes at least one of polyamide resin and a mixed material of polyamide resin and glass fiber.

[0009] In a possible implementation manner, the material of the front cover and the sliding rod includes at least one of polyamide resin and a mixed material of polyamide resin and glass fiber.

[0010] In a possible implementation manner, the sliding resistance between the sliding rod and the guide rail is 20-30N.

[0011] In a possible implementation manner, the locking structure includes a protrusion and a groove that match each other.

[0012] In a possible implementation manner, a detachable blocking member is provided between the sliding rod and the guide rail, and the blocking member can limit the sliding rod from separating from the guide rail.

[0013] In a possible implementation manner, the foam headrest covers the top end of the front cover and one side for supporting the head.

[0014] On the other hand, the present application also provides a seat comprising a seat back and the seat headrest as described above.

[0015] In a possible implementation manner, a connecting bracket is provided at the top end of the seat back, and the seat headrest is detachably connected to the connecting bracket.

[0016] In a possible implementation manner, the seat back includes a seat frame and a foam back, and the foam back is foam-molded on the seat frame.

[0017] The implementation of this application has the following beneficial effects:

[0018] A seat headrest provided in the present application includes a rear cover assembly and a front cover assembly, the rear cover assembly includes a rear cover and a guide rail that are integrally injection-molded, and the rear cover can be fixedly connected to the seat; the front cover assembly includes a front cover and a slide rod that are integrally injection-molded, and the dimensional accuracy of the front cover assembly and the rear cover assembly can be improved through injection molding, thereby improving the parallelism of the guide rail and the slide rod, and eliminating the assembly error between the slide rod and the guide rail; the slide rod is slidably connected to the guide rail, and a locking structure is provided between the slide rod and the guide rail, and the locking structure can limit the relative movement between the slide rod and the guide rail, and realize stepless adjustment between the guide rail and the slider; the front cover assembly also includes a foam headrest foamed on the front cover, which is beneficial to improving the comfort and support of the headrest. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] To more clearly illustrate the technical solution of this application, the following is a brief introduction to the drawings used in the embodiments, wherein identical components are denoted by identical reference numerals. Obviously, the drawings described below are merely some embodiments of this application, and those skilled in the art can derive other drawings based on these drawings without inventive effort.

[0020] Figure 1 : A schematic diagram of the cross-sectional structure of a seat headrest provided in an embodiment of the present application

[0021] Figure 2: A schematic structural diagram of a rear cover assembly provided in an embodiment of the present application;

[0022] Figure 3 : A schematic structural diagram of a front cover assembly provided in an embodiment of the present application;

[0023] Figure 4 : A schematic structural diagram of the guide rail and slide bar provided in an embodiment of the present application;

[0024] Figure 5 : A schematic structural diagram of a foam headrest provided in an embodiment of the present application;

[0025] Figure 6 : A schematic structural diagram of a seat back provided in an embodiment of the present application;

[0026] Figure 7 : A schematic diagram of the structure of the seat back and headrest after assembly provided by an embodiment of the present application;

[0027] Figure 8 : A schematic structural diagram of the seat back and rear cover assembly after assembly provided by an embodiment of the present application;

[0028] Among them, the reference numerals in the figure correspond to:

[0029] 1-rear cover assembly, 11-rear cover, 12-guide rail, 2-front cover assembly, 21-front cover, 22-slide rod, 23-foam headrest, 3-seat backrest, 31-connecting bracket, 32-foam backrest, 33-fixing bracket. DETAILED DESCRIPTION

[0030] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the quantity of the technical features indicated. Thus, features defined as "first" or "second" may explicitly or implicitly include at least one of these features.

[0032] In this application, unless otherwise specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; they can refer to direct connection or indirect connection through an intermediate medium; they can refer to internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0033] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element.

[0034] It should be noted that the directions or positional relationships indicated by terms such as "upper", "lower", "left", "right", "inside", "outside", "front", and "back" are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing this application. They do not indicate or imply that the device or structure referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on this application.

[0035] The following describes the seat headrest provided by the embodiment of the present application with reference to the accompanying drawings. The seat headrest includes a rear cover assembly 1 and a front cover assembly 2. The rear cover assembly 1 includes a rear cover 11 and a guide rail 12 that are integrally formed by injection molding. The rear cover 11 can be fixedly connected to the seat; the front cover assembly 2 includes a foam headrest 23, a front cover 21 and a slide rod 22. The front cover 21 and the slide rod 22 are integrally formed by injection molding. The slide rod 22 is slidably connected to the guide rail 12. Figure 1 , Figure 1A schematic diagram of the structure of the rear seat headrest in which the slide rod 22 is slidably connected to the guide rail 12 is shown. A locking structure is provided between the slide rod 22 and the guide rail 12, which can limit the relative movement between the slide rod 22 and the guide rail 12. The foam headrest 23 is foamed and formed on the front cover 21. The seat headrest provided in the present application includes a rear cover 11 and a guide rail 12 that are integrally formed by injection molding, and a front cover 21 and a slide rod 22 that are integrally formed by injection molding. The dimensional accuracy of the rear cover assembly 1 and the front cover assembly 2 can be improved through the integral injection molding process, which is beneficial to improving the parallelism of the guide rail 12 and the slide rod 22, thereby eliminating the assembly error between the slide rod 22 and the guide rail 12; the slide rod 22 is slidably connected to the guide rail 12, and a locking structure is provided between the slide rod 22 and the guide rail 12, which can limit the relative movement between the slide rod 22 and the guide rail 12, and realize stepless adjustment between the guide rail 12 and the slider; the front cover assembly 2 also includes a foamed headrest 23 foamed on the front cover 21. In this way, the foamed headrest 23 is directly formed on the front cover 21 through the foaming process, which is beneficial to improving the comfort and support of the headrest and simplifying the internal structure of the headrest.

[0036] Specifically, the injection molding process is to inject molten material into a closed mold cavity under high pressure, and form a component of a specific shape after cooling and solidification. In this way, the integrated rear cover 11 and guide rail 12 and the integrated front cover 21 and slide rod 22 are manufactured through the injection molding process, which can achieve efficient batch manufacturing and improve the dimensional accuracy of the front cover assembly 2 and the rear cover assembly 1.

[0037] Specifically, the dimensional tolerance of the guide rail 12 and the slide rod 22 prepared by the injection molding process is ±0.1mm. It can be understood that the injection molding process is conducive to improving the dimensional accuracy of the guide rail 12 and the slide rod 22, reducing the cumulative tolerance, and thereby improving the smoothness of the fit between the guide rail 12 and the slide rod 22, ensuring the assembly accuracy between the guide rail 12 and the slide rod 22.

[0038] In a possible embodiment, at least two guide rails 12 are provided on the rear cover 11 at intervals, and at least two slide bars 22 are provided on the front cover 21 at intervals. Figure 2 and Figure 3 , Figure 2 This is a structural diagram of two guide rails 12 spaced apart on the back cover 11. Figure 3 This is a structural schematic diagram of two sliding rods 22 spaced apart on the front cover 21, wherein the sliding rods 22 are arranged corresponding to the guide rails 12, the sliding rods 22 can be assembled into the corresponding guide rails 12, and at least two sliding rods 22 spaced apart can move synchronously, which is beneficial to improving the stability of relative sliding between the rear cover assembly 1 and the front cover assembly 2.

[0039] Specifically, the sliding range of the slide bar 22 relative to the guide rail 12 is 0-100 mm. It is understood that the sliding range of the slide bar 22 relative to the guide rail 12 can be any value within the range of 0-100 mm, which is not enumerated here. In this way, the front cover assembly 2 can slide relative to the rear cover assembly 1 within the above range, and the height of the front cover assembly 2 can be adjusted according to the actual needs of the user to meet the needs of users of different heights.

[0040] In a possible embodiment, the guide rail 12 is provided with a limited guide groove in the longitudinal direction, and the slide bar 22 is provided with a slider in the longitudinal direction. The slider can be accommodated in the limited guide groove, and the slider and the limited guide groove are slidably matched. Figure 4 , Figure 4 The structure details of the guide rail 12 with a limiting guide groove and the slide bar 22 with a slider are shown. By providing the mutually cooperating slider and limiting guide groove, the contact area between the slide bar 22 and the guide rail 12 is increased, limiting the lateral rotation of the slide bar 22 within the guide rail 12, thereby preventing the headrest from moving during vehicle motion.

[0041] In a possible embodiment, the material of the rear cover 11 and the guide rail 12 includes at least one of polyamide resin and a blend of polyamide resin and glass fiber. Polyamide resin has excellent flexibility and can absorb collision energy through plastic deformation, preventing damage to the head. Furthermore, polyamide resin has good melt flowability and can be used in injection molding processes, facilitating the formation of a complex, integrated structure of the rear cover 11 and the guide rail 12. Blending glass fiber with polyamide resin can improve the composite material's flexural properties, tensile strength, and thermal stability. Compared to metal materials, polyamide resin and glass fiber have lower density, which helps reduce the overall weight of the headrest and achieve lightweight manufacturing.

[0042] Specifically, the material of the back cover 11 and the guide rail 12 is a mixture of polyamide 66 and glass fiber; preferably, the material of the back cover 11 and the guide rail 12 includes a mixture of 70% polyamide 66 and 30% glass fiber. In this way, the polyamide resin material is used as the matrix to provide flexible molecular chains and hydrogen bond networks, which can effectively absorb impact energy and maintain crystallization stability at high temperatures. 30% glass fiber is used as the reinforcing phase to form a rigid skeleton, so that the glass fiber and the resin can be bonded through a silane coupling agent, so that the glass fiber is arranged in a direction along the injection molding flow direction to bear the main stress, which is beneficial to improve the rigidity and dimensional stability of the back cover 11 and the guide rail 12.

[0043] In a possible embodiment, the material of the front cover 21 and the slide bar 22 includes at least one of polyamide resin and a blend of polyamide resin and glass fiber. This improves the impact resistance of the front cover 21, absorbing collision energy through plastic deformation and preventing head injury. Furthermore, polyamide resin has good melt flowability and is suitable for injection molding, facilitating the formation of a complex, integrated structure of the front cover 21 and the slide bar 22. The glass fiber can enhance the bending resistance, tensile strength, and thermal stability of the blended material.

[0044] Specifically, the material of the front cover 21 and the slide rod 22 is a mixture of polyamide 66 and glass fiber; preferably, the material of the front cover 21 and the slide rod 22 includes a mixture of 70% polyamide 66 and 30% glass fiber. In this way, using polyamide resin material as the matrix and 30% glass fiber as the reinforcing phase can improve the rigidity and dimensional stability of the front cover 21 and the slide rod 22, and reduce the weight of the front cover assembly 2, which is conducive to the sliding of the front cover assembly 2 relative to the rear cover 11.

[0045] It is understandable that the front cover 21 and the rear cover 11 can be made of the same material or different materials, and the materials of the front cover 21 and the rear cover 11 can be adjusted according to actual application requirements.

[0046] In a possible embodiment, the sliding resistance between the slide bar 22 and the guide rail 12 is 20-30 N. It is understood that the sliding resistance between the slide bar 22 and the guide rail 12 can be any value between 20-30 N, which is not enumerated here. Thus, controlling the sliding resistance between the slide bar 22 and the guide rail 12 within the aforementioned range ensures that the front cover assembly 2 does not slide down due to inertia or vibration, while also facilitating user adjustment of the front cover assembly 2.

[0047] Specifically, the slide rod 22 is installed in the guide rail 12, and the slide rod 22 is tightly fitted with the inner wall of the guide rail 12. During the movement of the slide rod 22 relative to the guide rail 12, the slide rod 22 can generate resistance through friction between the guide rails 12, thereby realizing stepless adjustment between the rear cover assembly 1 and the front cover assembly 2, which is easy to operate and helps to improve usage efficiency.

[0048] In a possible embodiment, the locking structure includes mutually matching protrusions and grooves, so that the relative locking between the guide rail 12 and the slide rod 22 can be achieved through the cooperation between the protrusions and the grooves, thereby preventing the front cover assembly 2 from moving relative to the rear cover assembly 1 during the movement of the vehicle.

[0049] In a possible embodiment, the locking structure includes a locking piece and a locking hole; specifically, the guide rail 12 is provided with locking pieces at intervals in the longitudinal direction, and the slide rod 22 is provided with locking holes at intervals in the longitudinal direction. The slide rod 22 slides longitudinally in the guide rail 12, and the slide rod 22 moves to a preset position, and the relative locking of the position between the slide rod 22 and the guide rail 12 can be achieved through the locking piece and the locking hole.

[0050] In a possible embodiment, a headrest frame is provided on the rear cover 11, and the headrest frame is used to support the rear cover assembly 1, and can withstand and disperse the impact energy received by the headrest; specifically, the headrest frame and the rear cover 11 are an integrally-molded structure by injection molding, which can eliminate the assembly gap between the rear cover 11 and the headrest frame, reduce assembly parts, form a continuous force-bearing structure, and help improve the impact resistance of the headrest.

[0051] Specifically, an avoidance groove is further provided on the rear cover 11 , which can achieve relative avoidance between the front cover 21 and the rear cover 11 during the sliding stroke of the front cover assembly 2 , thereby ensuring smooth sliding of the front cover 21 .

[0052] In a possible embodiment, a detachable blocking member is provided between the slide bar 22 and the guide rail 12. The blocking member can prevent the slide bar 22 from separating from the guide rail 12. It can be understood that after the slide bar 22 is assembled to the guide rail 12, the blocking member is assembled at the top end of the guide rail 12 to prevent the slide bar 22 from separating from the guide rail 12 after the bottom end of the slide bar 22 moves to the top end of the guide rail 12. Specifically, the blocking member is provided at the top end of the guide rail 12. The blocking member can be an injection-molded boss. The injection-molded boss and the guide rail 12 are an integrally injection-molded structure, which helps to reduce the assembly tolerance between the various components.

[0053] In a possible implementation manner, the foamed headrest 23 is formed on the front cover 21 by a foaming molding process, wherein the foaming molding process places the front cover 21 in a foaming mold, and the foaming material is fixed to the front cover 21 through cooling and cross-linking, thereby reducing the gap between the foamed headrest 23 and the front cover 21; and the shape of the foamed headrest 23 can be designed by designing the foaming mold, thereby realizing mass production of the foamed headrest 23 and improving the dimensional accuracy of mass-produced foamed headrests 23.

[0054] Specifically, the foam headrest 23 covers the top of the front cover 21 and one side for supporting the head. Figure 5 , Figure 5 It is a side view of the front cover assembly 2, showing the structure of the foam headrest 23 wrapped around the front cover 21. In this way, the foam headrest 23 can fit the curve of the head and neck, provide support for the user's head and neck, and evenly distribute the pressure on the seat headrest.

[0055] On the other hand, the present application also provides a seat, comprising a seat back 3 and a seat headrest as described above, with reference to Figure 7 , Figure 7 This diagram shows the seat headrest assembled to the seat back 3. This reduces the number of subassembly components and the impact of tolerances during assembly. Furthermore, the lightweight headrest reduces redundant seat components, thereby reducing overall seat mass, simplifying the manufacturing process, and facilitating mass production.

[0056] In a possible embodiment, a connecting bracket 31 is provided at the top of the seat back 3. Figure 6 , the seat headrest can be detachably connected to the connecting bracket 31. Like this, the modular design of the seat back 3 and the seat headrest can be realized, the sub-assembly components of the seat are reduced, and it is conducive to reducing the assembly tolerance of the seat.

[0057] Specifically, a locking hole is provided on the rear cover 11, and a locking piece that can be engaged with the locking hole is provided on the connecting bracket 31. In this way, through the cooperation between the locking hole and the locking piece, a detachable connection between the seat headrest and the seat back can be achieved.

[0058] In a possible embodiment, a connecting plate is provided on the rear cover 11 of the seat headrest, and the connecting plate can be fixedly connected to the connecting bracket 31, referring to Figure 8 , Figure 8 The seat structure is shown after the rear cover assembly 1 is securely connected to the connecting bracket 31. Specifically, the connecting plate and connecting bracket 31 are provided with corresponding locking holes, through which a locking member can pass, securing the connecting bracket 31 to the connecting plate. This secures the position of the seat headrest and prevents it from moving relative to the seat back 3.

[0059] In a possible embodiment, the seat back 3 includes a seat frame and a foam back 32, which is foam-molded onto the seat frame. This allows the foam back 32 to fill the gaps in the seat frame, avoiding the "foam-frame separation" issue found in conventional assembled backrests and improving the overall rigidity of the seat back 3.

[0060] Specifically, a fixing bracket 33 is provided at the bottom of the seat back 3 , and the fixing bracket 33 can be fixedly connected to the vehicle to achieve assembly of the seat and the vehicle.

[0061] On the other hand, the present application also provides a vehicle, comprising the seat headrest as described above or the seat as described above.

[0062] It should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same and similar parts between the various embodiments can be referenced to each other.

[0063] What is described above are only some embodiments of the present application and are not intended to limit the present application. Those skilled in the art should understand that the present application may be subject to various changes and improvements, and any modifications, equivalent substitutions, and improvements made in accordance with the present application shall fall within the scope of protection claimed by the present application.

Claims

1. A seat headrest, characterized in that: include: A rear cover assembly, comprising an injection-molded integrally formed rear cover and a guide rail, wherein the rear cover can be fixedly connected to the seat; The front cover assembly includes a foam headrest, a front cover and a sliding rod. The front cover and the sliding rod are injection-molded as one piece. The sliding rod is slidably connected to the guide rail. A locking structure is provided between the sliding rod and the guide rail. The locking structure can limit the relative movement between the sliding rod and the guide rail. The foam headrest is foamed and formed on the front cover.

2. The seat headrest according to claim 1, characterized in that: The material of the rear cover and the guide rail includes at least one of polyamide resin and a mixed material of polyamide resin and glass fiber.

3. The seat headrest according to claim 1, characterized in that: The front cover and the slide bar are made of at least one of polyamide resin and a mixed material of polyamide resin and glass fiber.

4. The seat headrest according to any one of claims 1 to 3, characterized in that: The sliding resistance between the slide bar and the guide rail is 20-30N.

5. The seat headrest according to any one of claims 1 to 3, characterized in that: The locking structure includes protrusions and grooves that match each other.

6. The seat headrest according to any one of claims 1 to 3, characterized in that: A detachable blocking member is provided between the slide bar and the guide rail, and the blocking member can limit the slide bar from being separated from the guide rail.

7. The seat headrest according to any one of claims 1 to 3, characterized in that: The foam headrest covers the top end of the front cover and one side thereof for supporting the head.

8. A seat, characterized in that: The utility model comprises a seat back and a seat headrest according to any one of claims 1 to 7.

9. The seat according to claim 8, characterized in that A connecting bracket is provided at the top end of the seat back, and the seat headrest is detachably connected to the connecting bracket.

10. The seat according to claim 8, characterized in that The seat back comprises a seat frame and a foam back, and the foam back is foam-molded on the seat frame.

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