Dual back chair universal lifting backrest
By designing a universal adjustable backrest for double-back chairs, and employing structures such as buckles, damping, and springs, the problem of existing double-back ergonomic chairs being incompatible with different body types has been solved, achieving the effects of reducing costs and improving comfort.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JINYONG OFFICE FURNITURE (SHANGHAI) CO LTD
- Filing Date
- 2025-08-04
- Publication Date
- 2026-07-21
AI Technical Summary
The existing double-back ergonomic chairs cannot accommodate the different body types due to their height adjustment function, resulting in high production costs and poor aesthetics, failing to meet the needs of enterprises for cost reduction and efficiency improvement as well as user comfort.
A universal adjustable backrest frame for double-back chairs was designed. Through the combination of components such as the headrest front cover, headrest back shell, headrest rod, backrest rod, and back panel, and by adopting structures such as buckles, damping, spring devices, and movable torsion devices, the headrest and backrest frame can be flexibly adjusted to meet the needs of users of different body types.
It achieves a reliable structure, stable support, and beautiful appearance, reduces production costs, adapts to different models of bases and chair components, provides multi-dimensional adjustment functions, disperses pressure on the spine and neck, and improves user comfort and product experience.
Smart Images
Figure CN224522708U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to an ergonomic chair, specifically a universal adjustable backrest for a double-back chair. Background Technology
[0002] With fierce market competition, ergonomic chairs with various functions are attracting consumers. Currently, most dual-back ergonomic chairs on the market, due to their unique left and right backrest structure, cannot be further upgraded to adjust their height to suit the needs of consumers with different body types. A common way to upgrade the height adjustment function is to optimize the entire backrest frame, but this has drawbacks: different optimization solutions are needed for different product characteristics, resulting in higher production costs and slightly less aesthetic appeal, failing to meet the development needs of enterprises for cost reduction and efficiency improvement. Utility Model Content
[0003] The purpose of this utility model is to provide a universal adjustable backrest for double-back chairs to solve the problems mentioned in the background art.
[0004] To achieve the above objectives, this utility model provides the following technical solution:
[0005] A universal adjustable backrest frame for a double-back chair includes a headrest front cover, a headrest back cover, a headrest rod, a backrest rod, a back panel, a movable cover plate, a movable cover plate fixing plate, and a crossbar. The headrest back cover has a buckle on one side that is fastened to the headrest front cover. A headrest rotation damper is installed inside the headrest back cover and is movably assembled with the top of the headrest rod. A headrest lifting damper is installed on one side of the backrest rod and is movably assembled with the headrest rod. The backrest rod is fastened to the back panel. A movable slider and a spring device are installed on one side of the movable cover plate, and a locking strip on the movable cover plate engages with a groove on the back panel, allowing the movable cover plate to slide along the groove. The movable cover plate is fastened to the movable cover plate fixing plate and the crossbar. A pre-drilled hole at the bottom of the back panel is fastened to a base. The crossbar is fastened to a movable locking mechanism.
[0006] Preferably, the front of the headrest cover is covered with headrest padding and has a pre-drilled hole for fastening with the headrest cover with a buckle. The headrest rotation damping has a built-in spring device to allow the headrest cover, headrest padding, and headrest back cover to be adjusted synchronously and flexibly.
[0007] Preferably, the headrest rotation damping is based on a screw as the rotation axis, and dust plugs are installed on both sides of the headrest back shell.
[0008] Preferably, the top of the backrest has a deep groove for installing a headrest bar; one side of the backrest has an empty groove, through which a backrest cover plate is fastened.
[0009] Preferably, the headrest lifting damping has a built-in spring device to allow the headrest rod to be flexibly adjusted up and down.
[0010] Preferably, the top of the movable cover plate has a deep groove for inserting a crossbar.
[0011] Preferably, the movable cover plate, the movable cover plate fixing plate, and the crossbar are fastened to the back plate by two screws.
[0012] Preferably, the back plate has a pre-drilled hole and is fastened to the back rod by three screws, and the bottom of the back plate has a pre-drilled hole and is fastened to the base by four screws.
[0013] Preferably, the movable twist fastener is mounted on the backrest.
[0014] Preferably, the movable twist is a connector with elastic properties, including but not limited to a metal elastic movable twist or a soft plastic twist.
[0015] Compared with existing technologies, the beneficial effects of this utility model are:
[0016] This utility model features a reliable structure, stable support, strong load-bearing capacity, and an attractive appearance. Its universal adjustable backrest frame is adaptable to different models of bases, backrests, and other components of double-back chairs, effectively reducing production costs and warehousing pressure for enterprises. It also meets the needs of users with different body types, allowing users to flexibly adjust the height of the backrests and headrests for a more comfortable experience. Designed for people who sit for long periods, it provides correct posture, scientifically supporting the lumbar spine, and its multi-directional and multi-dimensional adjustment functions effectively distribute pressure on the spine, shoulders, and neck, relaxing muscle tension. It provides a better user experience without causing fatigue during prolonged sitting. Suitable for market promotion. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the structure of this utility model;
[0018] Figure 2 This is a rear view schematic diagram of the present invention;
[0019] Figure 3 This is a side view of the present invention;
[0020] Figure 4 This is an isometric schematic diagram of the present invention;
[0021] In the diagram: 1-Headrest front cover; 1.1-Headrest padding; 2-Headrest back cover; 2.1-Headrest rotation damping; 2.2-Screw 1; 2.3 Dust plug; 3-Headrest rod; 3.1-Headrest lifting damping; 4-Backrest rod; 4.1-Backrest rod cover plate; 5-Backrest plate; 5.1-Screw 3; 6-Modible cover plate; 6.1-Modible slider; 6.2-Elastic device; 7-Modible cover plate fixing plate; 7.1-Screw 2; 8-Crossbar; 9-Base; 9.1-Screw 4; 10-Modible knob. Detailed Implementation
[0022] The technical solution of this patent will be further described in detail below with reference to specific embodiments.
[0023] Please see Figure 1-4 A universal lifting backrest for double-back chairs, the main body of which includes a headrest front cover 1, a headrest back shell 2, a headrest rod 3, a backrest rod 4, a back panel 5, a movable cover plate 6, a movable cover plate fixing plate 7, and a crossbar 8. The front cover 1 of the headrest is covered with headrest padding 1.1 and has pre-drilled holes for fastening with the headrest cover 1, which has a snap fastener. The back cover 2 of the headrest contains a headrest rotation damper 2.1, which is movably assembled with the top of the headrest rod 3 using screw 2.2 as the rotation axis. The headrest rotation damper 2.1 has a built-in spring device that allows the headrest cover 1, headrest padding 1.1, and back cover 2 to be adjusted synchronously and flexibly while maintaining a certain damping condition. This is to meet the needs of people who sit for long periods of time and ensure that the headrest does not compress the head and neck area, thus preventing blood circulation from being hindered by pressure. The top of the backrest rod 4 has a deep groove for installing the headrest rod 3 and is movably assembled with the headrest rod 3 via a headrest lifting damper 3.1 installed on the side of the backrest rod 4. The headrest lifting damper 3.1 has a built-in spring device for... The headrest bar 3 is flexibly adjustable up and down while maintaining a certain level of damping to provide precise support for the head and neck of people of different body types. A slot is provided on one side of the backrest bar 4 for fastening with the backrest bar cover plate 4.1. The backrest bar 4 is fastened to the back panel 5. The top of the movable cover plate 6 has a deep groove for inserting the crossbar 8, and the movable cover plate 6, movable cover plate fixing plate 7, and crossbar 8 are fastened to the back panel 5 using screws 7.1. A movable slider 6.1 and an elastic device 6.2 are built into the space between the movable cover plate 6 and the back panel 5, allowing the movable cover plate 6 to slide along the slot in the back panel 5 while maintaining a certain level of damping. The bottom of the back panel 5 has a pre-drilled hole for fastening with the base 9. The crossbar 8 is fastened to the movable toggle 10. The movable toggle 10 can be, but is not limited to, a metal elastic movable toggle, a soft plastic toggle, or other connecting parts with elastic properties.
[0024] During installation, the universal adjustable backrest frame for the double-back chair requires the application of lubricant between the back panel 5, the movable cover plate fixing plate 7, the movable cover plate 6, the movable slider 6.1, and the elastic device 6.2 if necessary. When the movable cover plate 6 slides along the slot on the back panel 5, it drives the crossbar 8, the movable knob 10, and the double backrests to slide together, adapting to the lumbar and back support needs of people of different body types who sit for long periods. The elastic properties of the movable knob 10 allow the double backrests to move flexibly left, right, up, and down, forming a biomimetic support to support the user's lower back, providing a wrapping, precise support, and distributing pressure, ensuring the user's lower back is not unsupported or compressed, and preventing blood circulation obstruction due to prolonged sitting.
[0025] The embodiments of the present invention described above do not constitute a limitation on the scope of protection of the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.
Claims
1. A universal adjustable backrest frame for double-back chairs, characterized in that, The device includes a front cover (1), a back cover (2), a headrest rod (3), a backrest rod (4), a back panel (5), a movable cover (6), a movable cover fixing plate (7), and a crossbar (8). The back cover (2) has a buckle on one side that is fastened to the front cover (1). The back cover (2) contains a headrest rotation damper (2.1) that is movably assembled with the top of the headrest rod (3). The backrest rod (4) has a headrest lifting damper (3.1) on one side that is movably assembled with the headrest rod (3). The backrest rod (4) and... The back plate (5) is fastened; the movable cover plate (6) is equipped with a movable slider (6.1) and a spring device (6.2) on one side, and the movable cover plate (6) is provided with a locking strip that engages with the slot of the back plate (5) so that the movable cover plate (6) slides along the slot of the back plate (5). The movable cover plate (6) is fastened with the movable cover plate fixing plate (7) and the crossbar (8); the bottom of the back plate (5) has a reserved hole that is fastened with the base (9); the crossbar (8) is fastened with the movable toggle (10).
2. The universal adjustable backrest frame for double-back chairs according to claim 1, characterized in that, The front of the headrest cover (1) is covered with headrest padding (1.1) and has a pre-drilled hole for fastening with the headrest cover (1) which has a buckle. The headrest rotation damping (2.1) has a built-in spring device to make the three parts of the headrest cover (1), headrest padding (1.1) and headrest back shell (2) adjust synchronously and flexibly.
3. The universal adjustable backrest frame for double-back chairs according to claim 1, characterized in that, The headrest rotation damping (2.1) uses screw one (2.2) as the rotation axis, and dust plugs (2.3) are installed on both sides of the headrest back shell (2).
4. The universal adjustable backrest frame for double-back chairs according to claim 1, characterized in that, The top of the backrest (4) has a deep groove for installing the headrest rod (3); one side of the backrest (4) has a slot, through which the backrest cover plate (4.1) is fastened.
5. The universal adjustable backrest frame for double-back chairs according to claim 1, characterized in that, The headrest lifting damping (3.1) has a built-in spring device to allow the headrest rod (3) to be flexibly adjusted up and down.
6. The universal adjustable backrest frame for double-back chairs according to claim 1, characterized in that, The top of the movable cover plate (6) has a deep groove for inserting a crossbar (8).
7. The universal adjustable backrest frame for double-back chairs according to claim 1, characterized in that, The movable cover plate (6), the movable cover plate fixing plate (7), and the crossbar (8) are fastened to the back plate (5) by screws (7.1).
8. The universal adjustable backrest frame for double-back chairs according to claim 1, characterized in that, The back plate (5) has a reserved hole and is fastened to the back rod (4) by screw three (5.1). The bottom of the back plate (5) has a reserved hole and is fastened to the base (9) by screw four (9.1).
9. The universal adjustable backrest frame for double-back chairs according to claim 1, characterized in that, The active twist (10) is fastened to the backrest.
10. The universal adjustable backrest frame for double-back chairs according to claim 1 or 9, characterized in that, The movable twist (10) is a connector with elastic properties, including but not limited to a metal elastic movable twist or a soft plastic twist.