Office chair backrest structure linked along with back

Abstract

The utility model belongs to the technical field of office chairs, and particularly relates to an office chair backrest structure linked along with the back. The backrest assembly is composed of a backrest supporting frame and an elastic backrest. The elastic backrest is fixedly connected with fixed bases on the inner sides of the left and right longitudinal beams of the backrest supporting frame through four groups of elastic connecting pieces on the two sides of the back surface; a pair of clamping sliding grooves are formed in the inner sides of the lower half sections of the inner sides of left and right longitudinal beams of the backrest supporting frame, and a waist support is movably clamped between the left and right clamping sliding grooves and is attached to the elastic backrest; the surface of the elastic backrest is wrapped with a layer of elastic mesh cloth, and after the upper half portion of the elastic backrest is pressed when the elastic backrest leans backwards, the middle of the elastic backrest deforms to be in a reverse arch shape and is tightly attached to the back. A double-layer backrest structure is adopted, and a support of the backrest structure is separated from a back support, so that the back support can be always kept in an attached state along with body movement, effective support is provided for the back, and comfort is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of office chairs, in particular to a backrest structure of an office chair which is linked with the backrest. Background Art

[0002] Currently, with the accelerated pace of social life, the production efficiency of daily necessities is also being tested, and the main development direction is low cost, practicality and high production efficiency. The office chair backrests used by people mainly include wood, metal frames, and rattan woven backrests. However, these backrests have the disadvantages of high processing costs, multiple processing steps, and low production efficiency. Traditional office chair backrests are fixed structures or multi-section structures. The backrest and support structure are connected together, which is relatively rigid and cannot be fully fitted to the back. Therefore, a backrest structure with automatic movement is proposed. Utility Model Content

[0003] In order to solve the defects and shortcomings of the existing technology, the purpose of the utility model is to provide an office chair backrest structure with a simple structure, reasonable design and easy use. It adopts a double-layer backrest structure to separate the support of the backrest structure from the back support, so that the back support can always keep in fit with the body movement, provide effective support for the back and increase comfort.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is as follows: it comprises a roller bracket, a cylinder, an adjustable base, a seat cushion, an armrest, and a backrest assembly; the middle of the roller bracket is fixed with a cylinder, the top of the cylinder is connected to the adjustable base, and the upper surface and both sides of the adjustable base are respectively provided with a seat cushion and an armrest; the rear end of the adjustable base is connected to the backrest assembly; wherein, the backrest assembly is composed of a backrest support frame and an elastic backrest; the elastic backrest is fixedly connected to the fixed base on the inner side of the left and right longitudinal beams of the backrest support frame through four sets of elastic connectors on both sides of the back Fixed; a pair of clamping grooves are provided on the inner sides of the lower half of the inner sides of the left and right longitudinal beams of the backrest supporting frame, and a lumbar support is movably clamped between the left and right clamping grooves, and the lumbar support keeps in close contact with the elastic backrest; the surface of the elastic backrest is wrapped with a layer of elastic mesh, and when leaning back, the upper part of the elastic backrest is compressed and the middle part is deformed into an anti-arch shape to keep in close contact with the back, and the elastic backrest is a soft thin sheet structure, and a large area of ​​air vents is provided in the middle of the elastic backrest, and the elastic mesh wrapped on the surface of the elastic backrest enables the elastic backrest to maintain a concave bowl-shaped structure to form a wrapping structure for the back.

[0005] Preferably, the backrest support frame is a rectangular frame structure, which is a micro-deformable structure with a thick bottom and a thin top, a hard bottom and a soft top, and a connecting base with an integrated structure is laterally connected to the bottom of the backrest support frame.

[0006] Preferably, the lumbar support slides up and down along the snap-fitting slot to adjust the lumbar support point.

[0007] Preferably, the elastic connector maintains a one-to-one correspondence with the fixed base and is fixed by bolts to achieve the connection and fixation between the backrest support frame and the elastic backrest.

[0008] After adopting the above structure, the beneficial effects of the utility model are:

[0009] 1. Provide good support including fitting the back curve support and dynamic support for the waist;

[0010] Fits the back curve support: The soft paddle structure of the chair back can closely fit the natural curve of the back, helping to maintain the normal physiological curvature of the spine;

[0011] Dynamic support for the waist: The dynamic backrest design can adjust the support position and strength according to the movement of the waist in real time, always maintaining effective support for the waist.

[0012] 2. Improve comfort:

[0013] Reduce pressure points: The backrest of the chair can continuously adjust according to the body's movements, making the contact between the back and the chair more even, distributing the body's weight, reducing local pressure, and thus improving comfort;

[0014] Adaptable to different body shapes: The office chair with dynamic backrest is highly adaptable and can meet the needs of people of different body shapes; providing users with personalized support and comfort experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the present invention is described in detail through the following specific implementations and drawings.

[0016] Figure 1 It is a structural diagram of the utility model;

[0017] Figure 2 This is a schematic structural diagram of the backrest assembly of the utility model;

[0018] Figure 3 This is a schematic structural diagram of the backrest support frame 61 of the present invention;

[0019] Figure 4 This is a schematic structural diagram of the elastic backrest 62 of the present invention;

[0020] Figure 5 This is a schematic diagram of the elastic backrest 62 of the present invention after being deformed under pressure;

[0021] Explanation of the accompanying drawings: roller bracket 1, cylinder 2, adjustment base 3, seat cushion 4, armrest 5, backrest assembly 6, backrest support frame 61, elastic backrest 62, lumbar support 63, connecting piece 64, connecting base 65, snap-in slide 66, fixed base 67, air vent 68. DETAILED DESCRIPTION

[0022] To make the objectives, technical solutions, and advantages of the present invention more clearly apparent, the present invention is described below using specific embodiments illustrated in the accompanying drawings. However, it should be understood that these descriptions are merely illustrative and are not intended to limit the scope of the present invention. Furthermore, descriptions of known structures and technologies are omitted in the following description to avoid unnecessary confusion regarding the concepts of the present invention.

[0023] It should also be noted here that, in order to avoid obscuring the present invention due to unnecessary details, only structures and / or processing steps closely related to the solution according to the present invention are shown in the accompanying drawings, while other details that are not closely related to the present invention are omitted.

[0024] See Figure 1-Figure 5 As shown, this specific embodiment adopts the following technical solutions: it includes a roller bracket 1, a cylinder 2, an adjustable base 3, a seat cushion 4, an armrest 5, and a backrest assembly 6; the middle of the roller bracket 1 is fixed with a cylinder 2, the top of the cylinder 2 is connected to the adjustable base 3, and the upper surface and both sides of the adjustable base 3 are respectively provided with a seat cushion 4 and an armrest 5; the rear end of the adjustable base 3 is connected to the backrest assembly 6; wherein, the backrest assembly 6 is composed of a backrest support frame 61 and an elastic backrest 62; the elastic backrest 62 is connected to the back Four sets of elastic connectors 64 on either side are connected and fixed to fixed bases 67 on the inner sides of the left and right longitudinal beams of the backrest support frame 61. A pair of engaging slots 66 are provided on the inner sides of the lower half of the inner sides of the left and right longitudinal beams of the backrest support frame 61. A lumbar support 63 is movably engaged between the left and right engaging slots 66, and the lumbar support 63 maintains a close fit with the elastic backrest 62. The surface of the elastic backrest 62 is wrapped with an elastic mesh. When reclining, the upper half of the elastic backrest 62 is compressed, and the middle part of the elastic backrest 62 deforms into a reverse arch shape, maintaining a close fit with the back. The flexible structure of the elastic backrest 62 maintains a close fit with the back, and when leaning left or right, or reclining backward, the elastic backrest 62 can always maintain a close fit with the back, providing sufficient support.

[0025] Among them, the backrest support frame 61 is a rectangular frame structure, which is a micro-deformation structure with a thick bottom and a thin top, a hard bottom and a soft top. The backrest support frame 61 provides four-point support for the elastic backrest 62; the bottom of the backrest support frame 61 is laterally connected with a connecting base 65 of an integrated structure; the elastic backrest 62 is a soft thin sheet structure, and a large-area air vent 68 is provided in the middle of the elastic backrest 62, and the elastic mesh wrapped on the surface of the elastic backrest 62 enables the elastic backrest 62 to maintain a concave bowl-shaped structure to form a wrapping structure for the back.

[0026] In addition, the lumbar support 63 slides up and down along the engaging slot 66 to adjust the lumbar support point. A soft airbag structure is provided on the surface of the lumbar support 63, which can be manually inflated and deflated to adjust the support strength according to the support requirements. The elastic connector 64 maintains a one-to-one correspondence with the fixed base 67 and is fixed by bolts to achieve the connection and fixation between the backrest support frame 61 and the elastic backrest 62. The elastic connector 64 bridges the gap between the backrest support frame 61 and the elastic backrest 62, providing space for the elastic backrest 62 to deform.

[0027] The working principle and effect of this specific implementation method:

[0028] 1. Provide good support:

[0029] Conforms to the back curve: Regardless of the user's posture, the chair back closely conforms to the natural curve of the back, including the cervical, thoracic, and lumbar vertebrae, providing comprehensive and even support. This helps maintain the normal physiological curvature of the spine, reduces spinal deformation and scoliosis caused by prolonged improper sitting posture, and prevents occupational diseases such as back pain and neck stiffness.

[0030] Dynamic Lumbar Support: People often unconsciously change their sitting posture during daily office work. This dynamic backrest design adjusts the position and strength of the support based on lumbar movements in real time, maintaining effective lumbar support. For example, when you lean forward, the backrest moves forward with you, providing support at the front of your waist to prevent it from hanging in the air. When you lean back, the backrest adjusts its angle to provide comfortable support and reduce pressure on your waist.

[0031] 2. Improve comfort:

[0032] Reduced pressure points: Traditional office chairs typically have fixed backs, which don't conform well to the back, easily creating localized pressure points and causing discomfort. A movable backrest, however, adjusts to your body's movements, ensuring more even contact between your back and the chair, distributing your weight and reducing localized pressure, thereby improving comfort. Even long periods of sitting in such a chair won't cause excessive fatigue or discomfort.

[0033] Adapts to different body shapes: Everyone has different body shapes and sizes, and this dynamic backrest office chair is highly adaptable and can meet the needs of people of all sizes. Whether tall or short, overweight or thin, the chair back can fit closely to the user's back, providing personalized support and comfort.

[0034] 3. Improve work efficiency:

[0035] Maintaining a good sitting posture: A good sitting posture is crucial for improving work efficiency. This type of chair can, to a certain extent, guide the user to maintain a correct sitting posture. When the chair back fits snugly against the back, the body naturally sits in a more upright position, avoiding poor sitting postures such as hunching over or crossing the legs. Maintaining a correct sitting posture for extended periods of time helps improve blood circulation, ensuring adequate oxygen supply to the brain, thereby enhancing concentration and work efficiency.

[0036] Convenient work operations: During work, people may need to frequently turn around and sideways. The dynamic backrest can flexibly rotate with the body's movements without hindering the body's activities, making it convenient for users to perform various work operations, such as taking and placing documents, communicating with colleagues, etc.

[0037] 4. Enhanced security:

[0038] Stabilizes the body: If the user suddenly leans back or loses balance, the chair backrest responds quickly, firmly hugging the back and providing stable support to prevent falls or injuries. This function is particularly important for people with poor coordination or those who tire easily.

[0039] Reduce collision injuries: Accidental collisions can occur in the office, such as collisions between chairs and other objects or people. Dynamic backrests can cushion collisions, lessening the impact and reducing the risk of injury.

[0040] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations that come within the meaning and range of equivalents of the claims be embraced within the present invention.

[0041] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. An office chair backrest structure with back linkage, characterized by: It comprises a roller bracket, a cylinder, an adjustment base, a seat cushion, an armrest and a backrest assembly; the cylinder is fixedly connected in the middle of the roller bracket, the top of the cylinder is connected to the adjustment base, the upper surface and both sides of the adjustment base are respectively provided with a seat cushion and an armrest; the rear end of the adjustment base is connected to the backrest assembly; wherein, the backrest assembly is composed of a backrest support frame and an elastic backrest; the elastic backrest is connected and fixed to the fixed base on the inner side of the left and right longitudinal beams of the backrest support frame through four groups of elastic connectors on both sides of the back; the left and right longitudinal beams of the backrest support frame are connected and fixed A pair of clamping grooves are provided on the inner side of the lower half of the inner side of the beam, and a lumbar support is movably clamped between the left and right clamping grooves, and the lumbar support is kept in close contact with the elastic backrest; the surface of the elastic backrest is wrapped with a layer of elastic mesh, and when leaning back, the upper part of the elastic backrest is compressed and the middle part is deformed into an anti-bow shape to keep in close contact with the back; the elastic backrest is a soft thin sheet structure, and a large area of ​​air holes is provided in the middle of the elastic backrest, and the elastic mesh wrapped on the surface of the elastic backrest enables the elastic backrest to maintain a concave bowl-shaped structure to form a wrapping structure for the back.

2. The backrest structure of an office chair with back linkage according to claim 1, characterized in that: The backrest support frame is a rectangular frame structure, which is a slightly deformable structure with a thick bottom and a thin top, a hard bottom and a soft top, and a connecting base of an integrated structure is laterally connected to the bottom of the backrest support frame.

3. The backrest structure of an office chair with back linkage according to claim 1, characterized in that: The waist support slides up and down along the clamping slot to adjust the waist support point.

4. The backrest structure of an office chair with back linkage according to claim 1, characterized in that: The elastic connecting piece keeps a one-to-one correspondence with the fixed base and is fixed by bolts to realize the connection and fixation between the backrest support frame and the elastic backrest.

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