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CN-121987038-A - Chair headrest assembly

CN121987038ACN 121987038 ACN121987038 ACN 121987038ACN-121987038-A

Abstract

A chair headrest assembly includes a headrest body vertically adjustable as a single unit relative to a support bracket attached to a seat back. The headrest body is pivoted to the top of the support frame through a pivot, and the pivot penetrates through a slightly curved opening vertically extending at the left side and the right side of the rear part of the headrest body. The slide rail is provided with teeth arranged on the inner surface of the rear part, and a damping gear mechanism is pivoted on the pivot and meshed with the slide rail. This engagement allows for controlled vertical and angular adjustment of the headrest body, providing smooth movement and maintaining headrest position without the need for an additional locking mechanism. The simplified construction improves user comfort and reduces manufacturing complexity by eliminating interference with the user's neck.

Inventors

  • CHEN DEJUN

Assignees

  • 广力达企业有限公司

Dates

Publication Date
20260508
Application Date
20250122
Priority Date
20241107

Claims (10)

  1. 1. A chair headrest assembly, comprising: a support frame configured to be attachable to the chair back, the support frame including a pivot at an upper end thereof; a headrest body, comprising: A rear part A front portion connected to the rear portion; At least one slide rail mounted to the inner surface of the rear portion of the headrest body, the slide rail having a series of teeth along its length, and At least one damping gear mechanism pivoted to a pivot of the support frame and enclosed in the headrest body, wherein the damping gear mechanism is meshed with teeth of the sliding rail; the left side and the right side of the rear part of the headrest body are provided with vertically extending openings, and each opening is used for the corresponding end part of the pivot to pass through; wherein engagement of the damping gear mechanism with the slide rail allows for controlled vertical adjustment of the headrest body relative to the support frame.
  2. 2. The chair headrest assembly according to claim 1 wherein the track comprises two parallel toothed tracks mounted to an inner bottom surface of the rear portion, the dampened gear mechanism comprising two gears each engaged with a respective toothed track.
  3. 3. The chair headrest assembly according to claim 1 wherein the slide rail is integrally formed on an inner surface of the rear portion of the headrest body.
  4. 4. The chair headrest assembly according to claim 1 wherein the opening in the rear of the headrest body is a vertically extending slot having a predetermined curvature, guiding the ends of the pivot shafts during vertical adjustment and tilting the headrest body forward or rearward accordingly.
  5. 5. The chair headrest assembly according to claim 1 wherein said dampening gear mechanism provides resistance during vertical movement, requires manual force to adjust said headrest body, and maintains the position of said headrest body when released.
  6. 6. The chair headrest assembly according to claim 1 wherein the rear and front portions of the headrest body are ergonomically contoured to support the head and neck of a user without interfering with the neck of the user during use.
  7. 7. The chair headrest assembly according to claim 1 further including a protective cover enclosing the dampened gear mechanism and pivot shaft within the headrest body.
  8. 8. The chair headrest assembly according to claim 7 wherein said dampening gear mechanism includes a biasing assembly exerting a force to maintain engagement between said dampening gear mechanism and said sled, wherein the biasing assembly is disposed on the protective cover.
  9. 9. The chair headrest assembly according to claim 1 wherein the damping gear mechanism includes a biasing assembly exerting a force to maintain engagement between the damping gear mechanism and the sled.
  10. 10. The chair headrest assembly according to claim 1 wherein said support bracket includes a central support post connected to the back of the chair, said pivot being located at a top end of said central support post.

Description

Chair headrest assembly Technical Field The present invention relates to ergonomic furniture, and in particular to an adjustable chair headrest. More particularly, the present invention relates to a chair headrest having vertical and angular adjustability to enhance the comfort of the user and the supporting effect of the head and neck. Background Adjustable chair headrests are often integrated into office chairs, play chairs and other seating solutions to provide support and comfort to the user during prolonged sitting postures. Conventional headrest designs typically have fixed or limited adjustment structures that allow the headrest to be tilted to an angle or adjusted vertically within a predetermined range. One notable prior art example is U.S. patent No. 9,380,878, which discloses a chair headrest assembly that includes a front side member, a middle member, and a rear side member. This design allows for vertical and angular adjustment through the combination of the pivot member and the fastening assembly, allowing the user to customize the position of the headrest according to the preferences. Despite the advances in existing designs, there are limitations that affect the comfort of the user and the overall functionality of the chair headrest. For example, U.S. patent No. 9,380,878 discloses a design that includes a plurality of interconnected components on the front side, middle and rear side. This complexity increases the manufacturing cost, assembly time, and potential risk of mechanical failure. Moreover, an increased number of components requires more complex maintenance procedures, potentially shortening product life and increasing the likelihood of wear. In addition, the integration of multiple components may result in a headrest design that is too cumbersome to meet modern ergonomic aesthetics or space saving requirements. Furthermore, the complex assembly limits the ability to easily customize or adjust the headrest design to accommodate different chair models or user preferences, limiting its applicability in various seating solutions. Precision assembly of multiple components requires higher production costs, potentially translating to higher retail prices and reduced market competitiveness. Moreover, the precise alignment and assembly of most components complicates the manufacturing process, potentially leading to higher defect rates and lower overall product reliability. Furthermore, the design of the back side member in U.S. patent number 9,380,878 to remain stationary during adjustment can cause interference between the user's neck and the back side portion of the headrest, particularly when used for extended periods of time, the static back may press against the user's neck, causing discomfort. In addition, while some headrests provide vertical and angular adjustment in existing office chair designs, the range and fluency of these adjustments tends to be limited. Users of different heights and sitting postures may have difficulty achieving an optimal headrest position that provides adequate support without causing stress. In view of the above limitations, there is a clear need for a more simplified and ergonomic chair headrest design. For example, to reduce the number of components to increase manufacturing efficiency, reduce costs, and minimize maintenance requirements, and also to provide interference-free vertical and angular adjustment to increase overall comfort to the user during use. Disclosure of Invention The present invention provides an improved chair headrest assembly that addresses ergonomic and structural limitations of conventional headrest designs. Specifically, the invention introduces a simplified and streamlined headrest structure, which improves user comfort, adjustment convenience and manufacturing efficiency. Unlike the prior art, which includes a plurality of interconnecting members on the front, middle and rear sides, the proposed headrest design omits the middle member. This reduced complexity of assembly results in a more streamlined assembly, reduced manufacturing costs and simplified assembly and maintenance procedures. In this embodiment, the headrest body includes an integrated rear portion and front portion. The rear portion serves as a front support frame ensuring structural stability while allowing for smooth adjustment. This integrated design eliminates static components that previously could cause ergonomic problems, such as interference with the user's neck, thereby improving overall user comfort. In addition, the rail mechanism mounted to the rear inner bottom surface has a series of teeth. These slide rails provide an accurate and controlled track for vertical adjustment of the headrest. In the invention, the number of the sliding rails in the sliding rail mechanism can be adjusted according to actual needs and can be 1,2 or even more than 3. The chair headrest assembly of the present invention further includes a damping gear mechanism pivotally co