Adjustable chair with telescopic backrest adjusting mechanism

Abstract

An adjustable chair enhances comfort and support of a user through an adjusting mechanism, and comprises a seat, a backrest and a base. A unique feature of such a chair is its telescopic backrest adjustment mechanism allowing simultaneous vertical and horizontal adjustment of the position of the backrest relative to the seat. This dual adjustment capability is achieved by using a telescopic tube arranged obliquely relative to the seat, enabling the backrest to move rearward and upward when the tube is elongated and forward and downward when the tube is shortened. The telescopic tube is equipped with a locking mechanism, allowing the backrest to be locked in various extended positions, thereby customizing backrest height and seat depth according to different user ergonomic requirements. The locking mechanism is operated through a release button or a lever, and the position design is convenient for a sitting user to easily touch.

Description

Technical Field

[0001] This invention relates to a chair, and more specifically, to an adjustable chair designed to provide improved comfort and support in a variety of work environments. Background Technology

[0002] Work chairs are essential in environments where tasks are primarily performed in a seated position, such as offices, assembly lines, and other production environments. The design of these chairs significantly impacts worker comfort, health, and productivity. Traditional work chairs typically come equipped with a variety of adjustable features, such as seat height, armrests, and tilt mechanisms, to enhance ergonomic support.

[0003] However, a common drawback of many office chairs is the lack of sufficient backrest adjustability. Typical chair backrests are often fixed in one position or offer only limited adjustability, failing to accommodate a wide range of user body sizes and shapes. This limitation can lead to several problems:

[0004] • Poor posture support: A fixed backrest cannot provide sufficient lumbar support for all users, leading to poor posture and potential back pain.

[0005] • Discomfort due to different body types: Especially in production line environments, workers of different heights and torso lengths may find it difficult to stay comfortable because the backrest cannot be adjusted to meet their specific needs.

[0006] • Fatigue and reduced productivity: Insufficient back support can lead to fatigue and discomfort, reducing a worker's ability to perform tasks effectively for extended periods.

[0007] While some advanced office chairs offer height-adjustable backrests, these solutions are often complex and expensive, making them impractical for production lines, and they still cannot adjust the depth of the seat relative to the backrest. This lack of depth adjustment means that shorter users may find the seat too deep, resulting in insufficient backrest contact and support, while taller users may find the seat too shallow, potentially causing the seat edges to uncomfortably press against the back of their legs.

[0008] Existing technologies include various adjustable chairs that attempt to address these ergonomic issues, but they often fall short in several aspects:

[0009] • Limited adjustment range: Many chairs only offer vertical backrest adjustment, neglecting the equally important horizontal seat depth adjustment.

[0010] • Complex mechanisms: Some existing solutions involve overly complex mechanisms that are not only prone to failure but also make the chair bulky and difficult to adjust.

[0011] Therefore, there is a need for a work chair that can provide an integrated solution in a simple and intuitive way, while adjusting the height and depth of the backrest to accommodate a wide range of users and improve ergonomic support in the workplace environment. Summary of the Invention

[0012] The present invention aims to overcome the limitations of the prior art and provide an adjustable chair that allows for simultaneous height and depth adjustment of the backrest through a simple and intuitive mechanism based on a telescopic configuration similar to an adjustable suitcase handle, thereby providing good support for the user.

[0013] The main objective of this invention is to provide an adjustable chair with an adjustable backrest that can be easily modified to accommodate the height and depth needs of various users, thereby providing better lumbar support and overall comfort, helping users maintain correct posture and reduce fatigue. Furthermore, the adjustable chair of this invention allows for simultaneous adjustment of both height and depth using a single intuitive mechanism, enabling users to easily adjust the chair backrest without leaving their seat.

[0014] The adjustable chair provided by this invention has several features. First, the chair includes one or more telescopic tubes for the base seat and backrest. These telescopic tubes are angled to allow the backrest to move both vertically and horizontally during adjustment, thereby enhancing ergonomic support by modifying the height and depth of the backrest relative to the seat. Second, a locking mechanism is integrated with the telescopic tubes to lock the backrest in various extended positions. This locking mechanism is easily operated via a release button or lever for quick and safe adjustment. Furthermore, the telescopic tubes are made of materials such as aluminum, steel, or reinforced plastic, chosen for their strength, lightweight, and durability. Additionally, in one embodiment, the base also includes multiple casters to allow the adjustable chair to slide on a flat surface.

[0015] The adjustable chair according to the present invention offers several advantages over existing chairs. By allowing vertical and horizontal adjustments, the adjustable chair can be customized to any user's individual comfort needs, thereby improving comfort and providing support. The simple mechanism based on the telescopic design allows for quick and easy adjustments, enhancing workflow and productivity even when the user is seated. Furthermore, the use of telescopic tubes in the adjustable chair maximizes the range of adjustment while maintaining a compact and efficient design, avoiding the bulkiness and complexity of other adjustable chairs.

[0016] In summary, this invention provides an adjustable chair that significantly improves ergonomic support and user comfort through an innovative telescopic backrest mechanism. This chair is not only multifunctional and easy to adjust, but also meets the needs of a diverse range of users in various work environments. Attached Figure Description

[0017] Figure 1 The illustration shows an external view of one embodiment of the adjustable chair of the present invention;

[0018] Figure 2 The illustration shows an embodiment of the locking mechanism for the adjustable chair of the present invention;

[0019] Figure 3 The diagram shows the state of the chair when the telescopic tube is extended and can be adjusted.

[0020] Figure 4 The diagram shows the state of the chair before the telescopic tube is extended, allowing for adjustment. Detailed Implementation

[0021] This invention relates to an ergonomically adjustable chair designed to enhance user comfort and support by providing a backrest that is adjustable in both height and depth, the backrest being adjustable using a telescopic mechanism. The following examples illustrate the structure, function, and advantages of this adjustable chair, demonstrating how it overcomes the limitations of the prior art and improves the user experience.

[0022] Please refer to Figure 1 , Figure 1 The illustration shows an external view of one embodiment of the adjustable chair of the present invention. In this embodiment, the adjustable chair 100 includes a seat 110, a backrest 120, and a base 130. The seat 110 includes a seat surface 112 for a user to sit on and is connected to the base 130. The base 130 includes a set of casters 132 (four in this embodiment) for easy movement. However, in other embodiments, the base 130 may not have casters 132. In this embodiment, the base 130 also includes a height adjustment mechanism 134, typically a pneumatic or hydraulic lifting device, allowing the user to adjust the height of the seat 110 according to personal preference.

[0023] In this embodiment, the backrest 120 is connected to the seat 110 via at least one telescopic tube 140. The telescopic tube 140 is the core component for adjusting the height of the backrest 120, and the telescopic tube 140 is set at an angle relative to the vertical axis of the seat 110. This angled setting allows the user to adjust the backrest 120 simultaneously in both vertical and horizontal directions, thereby changing the height and depth of the backrest 120 relative to the seat 110.

[0024] In this embodiment, the telescopic tube 140 is made of durable materials such as aluminum, steel, or reinforced plastic to ensure that it is both lightweight and strong enough to withstand frequent adjustments and the weight of different users. These telescopic tubes 140 have a series of sections that slide against each other, similar to the handle of a telescopic suitcase. In this embodiment, the telescopic tube 140 consists of an upper section 142 and a lower section 143, where the lower section 143 is connected to the seat 110 or the base 130 (in this embodiment, connected to the base 130), while the upper section 142 is connected to the backrest 120.

[0025] Please refer to Figure 2 , Figure 2 The illustration depicts an embodiment of the locking mechanism of the adjustable chair of the present invention. Adjustment of the backrest 120 is achieved via a release button 154 of a locking mechanism 150, which is released at the midpoint of a crossbar 152. When this release button 154 is pressed, it releases a pin (not shown) within the crossbar 152, allowing the upper section 142 and lower section 143 of the telescopic tube 140 to slide relative to each other. Specifically, the telescopic tube 140 can be locked at multiple positions along its length because the locking mechanism 150 internally includes spring-loaded pins, which in this embodiment are located on both sides of the crossbar 152, engaging corresponding holes or grooves on the telescopic tube 140. Once the desired position is reached, releasing the release button 154 causes the pins to engage with the corresponding holes or grooves on the telescopic tube 140, locking the telescopic tube 140 in the appropriate position and securing the backrest 120 at the selected height and depth.

[0026] When the release button 154 is pressed, the telescopic tube 140 will extend or retract when the user pulls or pushes the backrest 120. Please also refer to... Figure 3 and Figure 4 , Figure 3 and Figure 4 The diagram illustrates the adjustable chair configuration with the telescopic tube 140 extended. Extending the telescopic tube 140 simultaneously increases the height of the backrest 120 and the distance between it and the seat 110, effectively raising the backrest 120 and increasing the seat depth. Conversely, shortening the telescopic tube 140 lowers the backrest 120 and reduces the seat depth. This dual adjustment capability is crucial for providing optimal lumbar support and accommodating users of different body types and shapes.

[0027] This adjustable chair 100 is ergonomically designed to support the user's back and reduce the risk of discomfort or injury during prolonged sitting. By allowing the backrest 120 to adjust in both the vertical and horizontal directions, the adjustable chair 100 helps maintain the user's spine's natural curve, providing support where it is most needed. This adjustability is particularly beneficial for users who sit for long periods, as it can significantly reduce fatigue and increase comfort.

[0028] In addition to adjustment mechanisms such as the telescopic tube 140, the adjustable chair 100 may include other ergonomic features to enhance user comfort. For example, the adjustable chair 100 may include an adjustable lumbar support (not shown) that moves synchronously with the backrest 120. This ensures that the lumbar support remains in an optimal position relative to the user's back, further enhancing ergonomic benefits.

[0029] Additionally, the backrest 120 may include an elastic section, which can be a resilient cushion. When the height and depth are adjusted, this elastic section conforms to the user's back to increase user comfort.

[0030] In summary, the adjustable chair with a telescopic backrest proposed in this invention offers a significant improvement over traditional office chairs. It provides customizable support to suit the individual needs of the user, enhancing comfort and ergonomic benefits.

[0031] The present invention has been described above, but it is not intended to limit the scope of the patent rights claimed by the present invention. Any modifications or refinements made by those skilled in the art without departing from the spirit or scope of this patent are equivalent changes or designs made under the spirit disclosed in the present invention and should be included within the claims of the present invention.

Claims

1. An adjustable chair, characterized in that, include: One seat; One backrest; A base supports the seat; A telescopic tube, wherein one end of the telescopic tube is connected to the seat or the base, and the other end of the telescopic tube is connected to the backrest; A locking mechanism is operatively connected to the telescopic tube, the locking mechanism being configured to lock the telescopic tube in multiple extended positions; The telescopic tube is set at a certain angle relative to the seat, so that extending the telescopic tube increases the distance between the backrest and the seat and raises the height of the backrest.

2. The adjustable chair as described in claim 1, characterized in that, The telescopic tube includes at least two relatively sliding sections, and the locking mechanism includes a release button that, when pressed, allows these sections to slide and adjust the position of the backrest.

3. The adjustable chair as described in claim 2, characterized in that, The release button is located on a horizontal bar, which is connected to the telescopic tube.

4. The adjustable chair as described in claim 1, characterized in that, The material of the telescopic tube is selected from the group consisting of aluminum, steel, and reinforced plastics.

5. The adjustable chair as described in claim 1, characterized in that, The locking mechanism is configured to lock at multiple locations along the length of the telescopic tube.

6. The adjustable chair as described in claim 1, characterized in that, The base also includes multiple casters.

7. The adjustable chair as described in claim 1, characterized in that, The backrest also includes an elastic portion that conforms to the user's back.

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