CN110435516B - Headrest assembly with adjustable lateral support member - Google Patents
Headrest assembly with adjustable lateral support member Download PDFInfo
- Publication number
- CN110435516B CN110435516B CN201810419966.7A CN201810419966A CN110435516B CN 110435516 B CN110435516 B CN 110435516B CN 201810419966 A CN201810419966 A CN 201810419966A CN 110435516 B CN110435516 B CN 110435516B
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- Prior art keywords
- lateral support
- pair
- bushing
- frame
- headrest assembly
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
- B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
- B60N2/80—Head-rests
- B60N2/885—Head-rests provided with side-rests
Abstract
The invention relates to a headrest assembly with adjustable lateral support members. A headrest assembly is provided with a frame having a central support region. The lateral support members are pivotally connected to the frame to provide lateral support at various angles. The shaft is connected to the frame. The bushing is disposed on the shaft using the slot. A spring is connected to the lateral support member and is oriented about the bushing to provide a resistive torque to the lateral support member relative to the frame to allow angular adjustment of the lateral support member relative to the central support region. The resilient member maintains continuous contact with the bushing due to the orientation of the slot relative to the resilient member. A groove is formed in the elastic member. A fastener is fastened to the shaft and extends through the slot to limit rotation of the lateral support member relative to the central support region.
Description
Technical Field
Various embodiments relate to headrest assemblies with adjustable lateral support members, commonly referred to as winged headrests (winged headrests).
Background
Chinese utility model patent No. CN 203419023U issued 2/5/2014 discloses a headrest assembly with adjustable lateral support members.
SUMMARY
In accordance with at least one embodiment, a headrest assembly is provided with a frame adapted to be mounted adjacent a seat back. The frame provides a central support area. Lateral support members are pivotally connected to the frame and extend laterally from the central support region to provide lateral support at various angles relative to the central support region. The shaft is connected to one of the frame and the lateral support member. The bushing is disposed on the shaft. The bushing has a slit (seam). A spring is connected to the other of the frame and the lateral support member and is oriented about the bushing to provide a resistive torque to the lateral support member relative to the frame to allow angular adjustment of the lateral support member relative to the central support region. The resilient member maintains continuous contact with the bushing due to the orientation of the slot relative to the resilient member.
According to a further embodiment, the spring maintains a continuous resisting torque to the lateral support member such that a torque applied to the lateral support member in excess of the resisting torque pivots the lateral support member for adjustment.
According to another further embodiment, the slit is angled relative to a central axis of the shaft.
According to another further embodiment, the resilient member comprises a cylindrical portion and at least one plate extending from the cylindrical portion. The bushing includes a cylindrical portion sized to be received within the cylindrical portion of the resilient member. At least one tab extends from the cylindrical portion to engage at least one spring plate to maintain alignment of the slot relative to the spring with the spring rotation bushing.
According to another further embodiment, the bushing is substantially cylindrical.
According to a further embodiment, the slot extends along the length of the bushing.
According to another further embodiment, the bushing is formed from a polymeric material.
According to another further embodiment, the lateral support member comprises a pair of lateral support members, each pivotally connected to the frame and extending laterally from the central support region in opposite directions to provide lateral support at various angles relative to the central support region. The axle includes a pair of axles, each axle connected to the frame and one of the pair of lateral support members. The bushing includes a pair of bushings, each bushing disposed on one of the pair of shafts. The spring includes a pair of springs, each spring being connected to the frame and the other of the pair of lateral support members and oriented around one of the pair of bushings.
According to another further embodiment, a groove is formed in the resilient member. A fastener is secured to the shaft and extends through the slot to engage an end of the slot to limit rotation of the lateral support member relative to the central support region.
According to a further embodiment, a hole is formed through the bushing. The fastener extends through the bushing aperture.
According to a further embodiment, a threaded hole is formed in the shaft. The fastener is threaded and engages in a threaded hole in the shaft.
According to another further embodiment, the shaft is connected to the frame.
According to a further embodiment, the elastic element is connected to the lateral support member.
In accordance with at least another embodiment, a headrest assembly is provided with a frame adapted to be mounted adjacent a seat back. The frame provides a central support area. The lateral support members are pivotally connected to the frame and extend laterally from the central support region to provide lateral support at various angles relative to the central support region. The shaft is connected to one of the frame and the lateral support member. A spring is connected to the other of the frame and the lateral support member and is oriented about the axis to provide a resistive torque to the lateral support member relative to the frame to allow angular adjustment of the lateral support member relative to the central support region. A groove is formed in the elastic member. A fastener is secured to the shaft and extends through the slot to engage an end of the slot to limit rotation of the lateral support member relative to the central support region.
According to a further embodiment, a threaded hole is formed in the shaft. The fastener is threaded and engages in a threaded hole in the shaft.
According to another further embodiment, a bushing is arranged on the shaft between the shaft and the elastic element.
According to a further embodiment, a hole is formed through the bushing. The fastener extends through the bushing aperture.
According to another further embodiment, the lateral support member comprises a pair of lateral support members, each pivotally connected to the frame and extending laterally from the central support region in opposite directions to provide lateral support at various angles relative to the central support region. The axle includes a pair of axles, each axle connected to the frame and the other of the pair of lateral support members. The spring includes a pair of springs, each spring being connected to the frame and the other of the pair of lateral support members and oriented about one of the pair of shafts.
According to another further embodiment, the shaft is connected to the frame.
In accordance with at least another embodiment, a method for assembling a headrest assembly provides a frame having a central support region. A pair of lateral support members is provided that are pivotally connected to the central support region at laterally spaced apart regions at pivots. A designed resisting torque is determined to pivot each of the pair of lateral support members. The bushing thickness associated with the designed resistance torque is selected. A pair of bushings having a selected bushing thickness are mounted on the pivot.
Drawings
Fig. 1 is a front perspective view of a headrest assembly according to an embodiment;
FIG. 2 is a top perspective view of the headrest assembly of FIG. 1;
FIG. 3 is a front perspective view of the headrest assembly of FIG. 1, illustrated partially disassembled;
FIG. 4 is a rear perspective view of the headrest assembly of FIG. 1, illustrated partially disassembled;
fig. 5 is an exploded front perspective view of the headrest assembly of fig. 1, according to an embodiment;
fig. 6 is a perspective view of a bushing of the headrest assembly of fig. 5, according to an embodiment;
FIG. 7 is an exploded front perspective view of the headrest assembly of FIG. 1 according to another embodiment;
FIG. 8 is a cross-sectional view taken along section line 8-8 of FIG. 3;
fig. 9 is a perspective view of a bushing of the headrest assembly of fig. 6 according to another embodiment.
Detailed Description
As required, detailed embodiments of the present invention are disclosed herein; however, it is to be understood that the disclosed embodiments are merely exemplary of the invention that may be embodied in various and alternative forms. The drawings are not necessarily to scale; some features may be exaggerated or minimized to show details of particular components. Therefore, specific structural and functional details disclosed herein are not to be interpreted as limiting, but merely as a representative basis for teaching one skilled in the art to variously employ the present invention.
A headrest assembly is illustrated in fig. 1 and 2. The head restraint assembly is generally indicated by the numeral 20. The headrest assembly 20 is a headrest assembly for any seat assembly, such as a vehicle seat assembly, an office chair, or the like. The vehicle seat assembly may be provided in any vehicle such as a land vehicle, aircraft, watercraft or the like. The vehicle seat assembly may also be disposed in any row in the vehicle.
The head restraint assembly 20 includes a pair of posts 22 for mounting the head restraint assembly 20 adjacent a seat back of the seat assembly. The headrest assembly 20 includes a rear base sub-assembly 24 and a front wing sub-assembly 26 disposed on the post 22. The base subassembly 24 is illustrated in fig. 2, 3 and 5. The base subassembly 24 is stationary relative to the column 22. The base subassembly 24 includes a base foam 28 (fig. 3 and 5) disposed on the column 22 and a base trim 30 (fig. 2 and 5) disposed over the base foam 28.
Referring now to fig. 4 and 5, the head restraint assembly 20 includes a rotor 32, the rotor 32 being formed of a metal alloy formed to integrally provide the pair of posts 22, the pair of intermediate forward supports 34 and the interconnecting cross member 36. A bracket 38 extends from the cross member 36. The bracket 38 is formed from a metal alloy and may be welded or otherwise fastened to the cross member 36.
Referring now to fig. 1-5, the wing assembly 26 includes a frame 40 mounted to the rotor 32. As illustrated in fig. 4, the frame 40 includes a plurality of clips 42 having leading and abutting edges that engage the carrier 38 and secure the frame 40 to the rotor 32. A threaded fastener 44 (fig. 5) secures one of the clips 42 to the bracket 38 to retain the frame 40 on the rotor 32.
For the embodiment depicted in fig. 1-5, the frame 40 is stationary relative to the rotor 32 and supports the wing sub-assembly 26 thereon. The frame 40 also provides a central support area for the head of the occupant. The wing subassembly 26 includes a pair of wings 46, 48 or lateral support members pivotally connected to the frame 40 to provide lateral support to the head of the occupant. The wings 46, 48 may lie alongside the frame 40, as depicted in fig. 3 and 4, or may pivot to provide lateral support as illustrated in fig. 2. The wings 46, 48 are manually adjustable within a pivot range to allow the occupant to adjust the wings 46, 48 to meet the occupant's preference and/or comfort.
Referring to fig. 3 and 5, head support foam 50 is provided across the wings 46, 48 and the frame 40. Head support foam 50 includes a pair of living hinges 52 to allow head support foam 50 to pivot with wings 46, 48. Fig. 1, 2 and 5 illustrate the headrest assembly 20 with the head support trim cover 54 over the wing assemblies 26. The head support trim cover 54 is sized to flex as the wings 46, 48 pivot.
Referring now to fig. 5, the wing subassembly 26 includes a pair of axles 56 mounted to the frame 40 to provide pivotal connection with the wings 46, 48. A pair of bushings 58, 60 are provided, each oriented about one of the shafts 56. The bushings 58, 60 are each formed from a polymer material such as Polyoxymethylene (POM). One of the bushings 60 is illustrated in greater detail in fig. 6. Bushing 60 includes a generally cylindrical body 62 for receiving shaft 56 and a longitudinal slot 64 for assembly on shaft 56.
Referring again to fig. 5, a pair of springs 66, 68 are disposed about the bushings 58, 60. Each spring 66, 68 is formed from a resilient material such as a spring steel alloy. Each spring 66, 68 has a cylindrical portion 70 sized to receive one of the bushings 58, 60. Each spring 66, 68 also includes a pair of plates 72, 74 sized to extend over a base plate 76 on each wing 46, 48.
Referring again to fig. 6, the bushing 60 includes a pair of tabs 75, 77 extending from the cylindrical body 62 along the slot 64. The tabs 75, 77 are sized to be received between the plates 72, 74 of the springs 66, 68 to maintain the orientation of each bushing 58, 60 relative to the corresponding spring 66, 68. By maintaining the orientation of bushings 58, 60 relative to springs 66, 68, engagement of springs 66, 68 on one of slots 64 is avoided, thereby providing a consistent resistive torque against rotation of wings 46, 48. In other words, by limiting the rotation of the bushings 58, 60 relative to the springs 66, 68, the springs 66, 68 may clear the slot 64, which may otherwise alter the torque generated.
Returning to fig. 5, a pair of threaded fasteners, namely a screw 78 and a nut 80, are provided on each wing 46, 48. Screws 78 and nuts 80 are tightened through the spring plates 72, 74 and the base plate 76. Pressure is applied as the screw 78 and nut 80 are tightened to tighten the cylindrical portion 70 against the bushing body 62 of the corresponding bushing 58, 60. The pressure on the bushings 58, 60 requires a predetermined torque to overcome and rotate the wings 46, 48.
The cylindrical portion 70 of each elastic element 66, 68 fastened on the bushing 58, 60 provides a resisting torque against the pivoting of the wing 46, 48. The resisting torque is sufficient to maintain the wings 46, 48 at any angular position of the wings 46, 48 relative to the frame 40 without any predetermined torque application.
With continued reference to fig. 5, a threaded bore 82 is formed transversely through each shaft 56. A pair of shoulder bolts 84 each include a threaded end that is tightened into each of the threaded holes 82 of the shaft 56. Slots (not shown) are formed in the springs 66, 68 and slots 86 (fig. 6) are formed in the bushings 58, 60 to allow the shank of the shoulder bolt 84 to pass through the shaft 56. The slots in the springs 66, 68 engage the shoulder bolts 84 to limit rotation of the springs 66, 68, and thus the wings 46, 48, relative to the frame 40. A pair of covers 88, 90 are provided on the backs of the wings 46, 48 to enclose the components of the wings 46, 48 therein.
Figures 7 and 8 show a wing sub-assembly 92 according to another embodiment. The wing subassembly 92 includes a frame 40 having an axle 56 to provide a pivotal connection to the wings 46, 48. Bushings 94, 96 are disposed about the shaft 56. The bushings 94, 96 are formed of a polymeric material, such as POM. POM provides sufficient structural integrity while reducing friction. One of the bushings 96 is illustrated enlarged in more detail in fig. 9. Bushing 96 includes a longitudinal slot 98 that is angled relative to the central axis of shaft 56. A slit parallel to the central axis of the shaft 56 may result in a change in torque at the location of the wings 46, 48 that engage the slit, as opposed to the location of the wings 46, 48 that do not contact the slit. The angled slot 98 is designed to maintain contact with the spring to achieve consistent torque at any location.
A hole 100 is formed through the bushing 96 to allow passage of the shoulder bolt 84. Shoulder bolt 84 engages bore 100 to limit rotation of bushing 96 to maintain the position of slot 98 relative to shaft 56.
Referring again to fig. 7 and 8, a pair of resilient members 102, 104 are provided similar to the previous embodiments so as to extend over the bushings 94, 96 and be secured to the wings 46, 48 by the screws 78. Each spring 102, 104 includes a threaded boss 106 for receiving the screw 78, thereby eliminating additional fastener components. Each spring 102, 104 also includes a slot 108 to allow passage of the shoulder bolt 84. The slot 108 of each resilient member 102, 104 engages the shoulder bolt 84 to limit forward rotation of the corresponding wing 46, 48.
The various designs of the wing subassemblies 26, 92 provide various pivot angle adjustments of the wings 46, 48 in a simplified design that allows for consistent torque without the need for additional components that increase cost, manufacturing, weight, and thus reduce fuel efficiency of the associated vehicle. The wing assemblies 26, 92 are modular and may be used in any headrest assembly 20. If different torques are required for a particular application, different torques can be achieved by utilizing different thicknesses of the bushings 58, 60, 94, 96. Accordingly, all other components of the wing sub-assembly 26, 92 may be standardized, while the various thicknesses for the bushings 58, 60, 94, 96 allow for a variety of torque-limited wing 46, 48 headrest assemblies 20.
While various embodiments are described above, it is not intended that these embodiments describe all possible forms of the invention. Rather, the words used in the specification are words of description rather than limitation, and it is understood that various changes may be made without departing from the spirit and scope of the invention. Furthermore, features of various implemented embodiments may be combined to form further embodiments of the invention.
Claims (17)
1. A headrest assembly, comprising:
a frame adapted to be mounted adjacent a seat back, the frame providing a central support area;
a lateral support member pivotally connected to the frame and extending laterally from the central support region to provide lateral support at various angles relative to the central support region;
a shaft connected to one of the frame and the lateral support member;
a bushing disposed on the shaft, the bushing having a slot; and
a spring connected to the other of the frame and the lateral support member and oriented about the bushing to provide the lateral support member with a resistive torque relative to the frame to allow angular adjustment of the lateral support member relative to the central support region, wherein the spring maintains continuous contact with the bushing due to the orientation of the slot relative to the spring;
wherein the bushing includes a pair of tabs extending from a cylindrical body of the bushing along the slot, and the pair of tabs are sized to be received between a pair of plates of the spring to maintain the orientation of the bushing relative to the spring.
2. The headrest assembly of claim 1, wherein the spring maintains a continuous resistive torque to the lateral support member such that a torque applied to the lateral support member in excess of the resistive torque pivots the lateral support member for adjustment.
3. The headrest assembly of claim 1, wherein the resilient member comprises:
the cylindrical portion is formed by a cylindrical portion,
the pair of plates extending from the cylindrical portion; and is
Wherein the cylindrical body of the bushing is sized to be received within the cylindrical portion of the resilient member, and
wherein the pair of tabs extend from the cylindrical body of the bushing to engage the pair of plates to rotate the bushing with the spring to maintain alignment of the slot relative to the spring.
4. The headrest assembly of claim 1, wherein the slot extends along a length of the bushing.
5. The headrest assembly of claim 1, wherein the bushing is formed from a polymer material.
6. The headrest assembly of claim 1, wherein the lateral support members include a pair of lateral support members, each pivotally connected to the frame and extending laterally from the central support region in opposite directions to provide lateral support at various angles relative to the central support region;
wherein the axle comprises a pair of axles, each axle connected to the frame and one of the pair of lateral support members;
wherein the bushing includes a pair of bushings each disposed on one of the pair of shafts; and is
Wherein the spring comprises a pair of springs, each spring connected to the frame and the other of the pair of lateral support members and oriented around one of the pair of bushings.
7. The headrest assembly of claim 1, wherein a slot is formed in the resilient member; and is
Wherein the headrest assembly further comprises a fastener fastened to the shaft and extending through the slot to engage an end of the slot to limit rotation of the lateral support member relative to the central support region.
8. The headrest assembly of claim 7, wherein a hole is formed through the bushing; and is
Wherein the fastener extends through the aperture.
9. The headrest assembly of claim 8, wherein a threaded bore is formed in the shaft; and is
Wherein the fastener comprises a threaded fastener engaged in the threaded bore in the shaft.
10. The headrest assembly of claim 1, wherein the shaft is connected to the frame.
11. The headrest assembly of claim 10, wherein the spring is coupled to the lateral support member.
12. A headrest assembly, comprising:
a frame adapted to be mounted adjacent a seat back, the frame providing a central support area;
a lateral support member pivotally connected to the frame and extending laterally from the central support region to provide lateral support at various angles relative to the central support region;
a shaft connected to one of the frame and the lateral support member;
a spring connected to the other of the frame and the lateral support member and oriented about the axis to provide a resistive torque to the lateral support member relative to the frame to allow angular adjustment of the lateral support member relative to the central support region, wherein a slot is formed in the spring; and
a fastener fastened to the shaft and extending through the slot to engage an end of the slot to limit rotation of the lateral support member relative to the central support region;
a bushing disposed on the shaft between the shaft and the elastic member;
wherein the bushing includes a pair of tabs extending from a cylindrical body of the bushing along an aperture of the bushing, and the pair of tabs are sized to be received between a pair of plates of the spring to maintain an orientation of the bushing relative to the spring.
13. The headrest assembly of claim 12, wherein a threaded bore is formed in the shaft; and is
Wherein the fastener comprises a threaded fastener engaged in the threaded bore in the shaft.
14. The headrest assembly of claim 12, wherein a hole is formed through the bushing; and is
Wherein the fastener extends through the aperture.
15. The headrest assembly of claim 12, wherein the lateral support members include a pair of lateral support members, each pivotally connected to the frame and extending laterally from the central support region in opposite directions to provide lateral support at various angles relative to the central support region;
wherein the axle comprises a pair of axles, each axle connected to the frame and one of the pair of lateral support members; and is
Wherein the spring comprises a pair of springs, each spring connected to the frame and the other of the pair of lateral support members and oriented about one of the pair of shafts.
16. The headrest assembly of claim 12, wherein the shaft is connected to the frame.
17. A method of assembling a headrest assembly, the method comprising:
providing a frame having a central support region;
providing a pair of lateral support members pivotally connected to the central support region at laterally spaced apart regions at pivots;
determining a designed resistance torque to pivot each of the pair of lateral support members;
selecting a bushing thickness associated with a designed resistance torque; and
a pair of bushings having a selected bushing thickness are mounted on the pivot.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810419966.7A CN110435516B (en) | 2018-05-04 | 2018-05-04 | Headrest assembly with adjustable lateral support member |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810419966.7A CN110435516B (en) | 2018-05-04 | 2018-05-04 | Headrest assembly with adjustable lateral support member |
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| Publication Number | Publication Date |
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| CN110435516A CN110435516A (en) | 2019-11-12 |
| CN110435516B true CN110435516B (en) | 2022-07-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810419966.7A Active CN110435516B (en) | 2018-05-04 | 2018-05-04 | Headrest assembly with adjustable lateral support member |
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| CN (1) | CN110435516B (en) |
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| CN104329368A (en) * | 2014-10-15 | 2015-02-04 | 哈尔滨东安发动机（集团）有限公司 | Bearing bushing structure |
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| EP2921341A1 (en) * | 2014-03-18 | 2015-09-23 | Volvo Car Corporation | Adjustable side support |
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| CN206668739U (en) * | 2017-04-25 | 2017-11-24 | 武汉泰盛汽车内饰件有限公司 | A kind of Damping rotation shaft for auto parts machinery assembling |
| CN206664368U (en) * | 2017-04-25 | 2017-11-24 | 武汉泰盛汽车内饰件有限公司 | Adjustable automobile seat headrest front wing skeleton |
| CN208198200U (en) * | 2018-04-28 | 2018-12-07 | 上汽大众汽车有限公司 | Car seat headrest front wing skeleton easy to assembly |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101918724A (en) * | 2007-11-08 | 2010-12-15 | 圣戈班性能塑料帕姆普斯有限公司 | Bearing bush |
| CN201530338U (en) * | 2009-09-23 | 2010-07-21 | 佛吉亚(上海)管理有限公司 | Eight-directional manually adjustable head cushion for automobile seats |
| CN202827215U (en) * | 2012-07-21 | 2013-03-27 | 长春富维-江森自控汽车饰件系统有限公司 | Automobile seat headrest adjusting mechanism for longitudinal and flank-angle adjustment |
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| EP2921341A1 (en) * | 2014-03-18 | 2015-09-23 | Volvo Car Corporation | Adjustable side support |
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| CN104329368A (en) * | 2014-10-15 | 2015-02-04 | 哈尔滨东安发动机（集团）有限公司 | Bearing bushing structure |
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| CN206668739U (en) * | 2017-04-25 | 2017-11-24 | 武汉泰盛汽车内饰件有限公司 | A kind of Damping rotation shaft for auto parts machinery assembling |
| CN206664368U (en) * | 2017-04-25 | 2017-11-24 | 武汉泰盛汽车内饰件有限公司 | Adjustable automobile seat headrest front wing skeleton |
| CN208198200U (en) * | 2018-04-28 | 2018-12-07 | 上汽大众汽车有限公司 | Car seat headrest front wing skeleton easy to assembly |
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| Publication number | Publication date |
|---|---|
| CN110435516A (en) | 2019-11-12 |
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