A seat structure

Abstract

This utility model relates to a seat structure, including a seat cushion, an upper connecting plate, a rear lower pivot, an elastic arc plate, a rear upper pivot, a front pivot, a pneumatic lifter, fasteners, a decorative cover, a switch button, a guide rod, a moving block, a positioning top block, a return spring, a rotating adjustment plate, and an adjustment linkage. The bottom end of the seat cushion is fitted with the upper connecting plate, and the bottom end of the upper connecting plate is provided with an ear block. An elastic arc plate is installed below the upper connecting plate, and the front end of the elastic arc plate is provided with a bearing seat. The front pivot is rotatably connected to the bearing seat, and one side of the front pivot is fixed to the inner wall of the ear block. A pneumatic lifter is sleeved and installed at the bottom end of the elastic arc plate. This utility model can simplify the structure of commercial office chairs, enabling them to meet the adjustment function and comfort requirements of commercial office chairs with lower R&D investment and lower manufacturing costs. Moreover, by changing different backrests, it can also meet the needs of civilian or household use.

Description

Technical Field

[0001] This utility model relates to the field of office chair technology, and in particular to a seat structure. Background Technology

[0002] Currently, there is a clear distinction between commercial and residential chairs on the market. Commercial chairs generally have diverse adjustment functions, complex mechanisms, and high manufacturing costs, and most of them are mesh chairs. Residential chairs, on the other hand, are mostly made of wood or upholstered, and have limited functions, such as dining chairs. How to develop a chair that can be used in both commercial and residential settings, meet the needs of multiple scenarios and functions, save on R&D investment, and offer high cost-effectiveness is a challenge and an opportunity for industry developers. Utility Model Content

[0003] The problem solved by this utility model is to provide a seat structure that simplifies the structure of commercial office chairs, enabling them to meet the needs of adjustment functions and comfort of commercial office chairs with lower R&D investment and lower manufacturing costs. Moreover, by changing different backrests, it can also meet the needs of civilian or household use.

[0004] To achieve the above objectives, this utility model adopts the following technical solution: a seat structure, including a seat cushion, an upper connecting plate, a rear lower pivot, an elastic arc plate, a rear upper pivot, a front pivot, a pneumatic lifter, fasteners, a decorative cover, a switch button, a guide rod, a moving block, a positioning top block, a return spring, a rotating adjustment plate, and an adjustment linkage. The bottom end of the seat cushion is fitted with the upper connecting plate, and the bottom end of the upper connecting plate is provided with an ear block. An elastic arc plate is installed below the upper connecting plate, and a bearing seat is provided at the front end of the elastic arc plate. The front pivot is rotatably connected to the bearing seat, and one side of the front pivot is fixed to the inner wall of the ear block. A pneumatic lifter is fitted onto the bottom end of the elastic arc plate, and a switch button is installed at the top end of the pneumatic lifter. A rotating column is provided at the top of the elastic arc plate. A rotating adjustment plate is rotatably connected to the outer side of the rotating column. An adjustment seat is provided on the outer wall of the top of the rotating adjustment plate. An adjustment connecting rod is rotatably connected inside the adjustment seat. A pressing plate is provided on the outer wall of one end of the adjustment connecting rod corresponding to the position of the switch button. A guide rod is fixedly connected inside the elastic arc plate. A moving block is slidably connected to the guide rod, and one side of the moving block is sleeved on the outer wall of the rotating adjustment plate. A positioning top block is slidably connected to the guide rod. A U-shaped groove is opened at the top of the positioning top block. A positioning protrusion is provided on the outer wall of the bottom end of the upper connecting plate corresponding to the position of the U-shaped groove. A return spring is slidably connected to the side of the guide rod near the elastic arc plate, and the other end of the return spring is sleeved with the positioning top block.

[0005] Preferably, the lower rear end of the elastic arc plate is provided with a through hole, a lower rear rotating shaft is installed through the through hole and is rotatably connected to a first connecting hole at the bottom of the armrest, an ear block is provided at the bottom rear end of the connecting plate, an upper rear rotating shaft is installed through the ear block and is rotatably connected to a corresponding second connecting hole on the armrest, and a third connecting hole is provided at the upper rear end of the armrest, a fastener is installed through the third connecting hole and is fixedly connected to a nut on the mesh back or soft backrest.

[0006] Preferably, a five-claw base is fixedly connected to the outer side of the pneumatic lifter, and a caster wheel is installed on the bottom outer wall of the five-claw base.

[0007] The beneficial effects of this utility model are: it can simplify the structure of commercial office chairs, enabling them to meet the needs of adjustment function and comfort of commercial office chairs with lower R&D investment and lower manufacturing cost, and can also meet the needs of civilian or household use by changing different backrests. Attached Figure Description

[0008] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a partial three-dimensional structural diagram of the present invention; Figure 3 This utility model Figure 2 Partial 3D structural diagram; Figure 4 This is a partial three-dimensional structural view of the present invention viewed from below; Figure 5 This is a three-dimensional structural diagram of the upper connecting plate and the elastic arc plate of this utility model; Figure 6 This is a three-dimensional structural diagram of the handrail of this utility model; Figure 7 This is a partial three-dimensional structural view of the present invention in its locked state; Figure 8 This is a partial three-dimensional structural view of the unlocked state of this utility model; Figure 9 This is a three-dimensional structural diagram of the unfolded backrest of this utility model.

[0009] Legend: 1. Seat cushion; 2. Upper connecting plate; 201. Ear block; 202. Positioning protrusion; 3. Rear lower pivot; 4. Elastic arc plate; 401. Bearing seat; 402. Rotating column; 403. Through hole; 5. Rear upper pivot; 6. Front pivot; 7. Pneumatic lifter; 701. Switch button; 8. Five-claw base; 9. Casters; 11. Guide rod; 12. Moving block; 13. Positioning top block; 131. U-shaped groove; 15. Return spring; 17. Rotating adjustment plate; 171. Adjustment seat; 19. Adjustment connecting rod; 191. Pressing plate; 21. Armrest; 211. First connecting hole; 212. Second connecting hole; 213. Third connecting hole; 23. Soft backrest; 24. Mesh back; 26. Fastener; 27. Decorative cover. Detailed Implementation

[0010] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0011] Specific implementation examples are given below.

[0012] See Figures 1-9A seat structure includes a seat cushion 1, an upper connecting plate 2, a rear lower pivot 3, an elastic arc plate 4, a rear upper pivot 5, a front pivot 6, a pneumatic lifter 7, a five-claw base 8, casters 9, a switch button 701, a guide rod 11, a moving block 12, a positioning top block 13, a return spring 15, a rotating adjustment plate 17, and an adjustment connecting rod 19. The upper connecting plate 2 is fitted onto the bottom end of the seat cushion 1, and an ear block 201 is provided at the bottom end of the upper connecting plate 2. An elastic arc plate 4 is installed below the upper connecting plate 2, and a bearing seat 401 is provided at the front end of the elastic arc plate 4. The front pivot 6 is rotatably connected to the bearing seat 401. One side of the front rotating shaft 6 is fixed to the inner wall of the ear block 201. A pneumatic lifter 7 is sleeved on the bottom end of the elastic arc plate 4. A switch button 701 is installed on the top of the pneumatic lifter 7. A rotating column 402 is set on the top of the elastic arc plate 4. A rotating adjustment plate 17 is rotatably connected to the outside of the rotating column 402. An adjustment seat 171 is set on the outer wall of the top of the rotating adjustment plate 17. An adjustment connecting rod 19 is rotatably connected inside the adjustment seat 171. A pressing plate 191 is set on the outer wall of one end of the adjustment connecting rod 19 corresponding to the position of the switch button 701. A guide rod 11 is fixedly connected inside the elastic arc plate 4. A movable block 12 is slidably connected to the guide rod 11, and one side of the movable block 12 is sleeved on the outer wall of the rotating adjustment plate 17. A positioning top block 13 is slidably connected to the guide rod 11. A U-shaped groove 131 is opened at the top of the positioning top block 13. A positioning protrusion 201 is provided on the bottom outer wall of the upper connecting plate 2 corresponding to the position of the U-shaped groove 131. A return spring 15 is slidably connected to the side of the guide rod 11 near the elastic arc plate 4, and the other end of the return spring 15 is sleeved with the positioning top block 13. A through hole 403 is provided at the lower rear end of the elastic arc plate 4. The lower rear rotating shaft 3 passes through the through hole 403 and is connected to the armrest. The first connecting hole 211 at the bottom of the 21 is rotatably connected. The rear end of the upper connecting plate 2 is provided with an ear block 202. The rear upper rotating shaft 5 passes through the ear block 202 and is rotatably connected to the corresponding second connecting hole 212 on the handrail 21. The upper rear end of the handrail 21 is provided with a third connecting hole 213. A fastener 26 is inserted through the third connecting hole 213 and is fixedly connected to the nut 231 on the mesh back 24, nut 241 or soft backrest 23. A five-claw base 8 is fixedly connected to the outside of the pneumatic lifter 7. A caster wheel 9 is installed on the bottom outer wall of the five-claw base 8 to facilitate the movement of the equipment.

[0013] Working principle: When the seat cushion 1 needs to be raised or lowered, one end of the adjusting linkage 19 can be lifted, causing the adjusting linkage 19 to move up and down along the adjusting seat 171. This causes the pressing plate 191 on the adjusting linkage 19 to press the switch button 701, causing the pneumatic lifter 7 on the elastic arc plate 4 to rise or fall, thereby adjusting the height of the chair to facilitate use by users of different heights. When the user leans against the backrest and needs to move back and forth, the adjusting linkage 19 can be moved forward. This causes the adjusting seat 171 to drive the rotating adjusting plate 17 to rotate counterclockwise along the rotating column 402. This causes the rotating adjusting plate 17 to drive the moving block 12 to move synchronously along the guide rod towards the adjusting linkage 19. Under the pushing force of the return spring 15, the positioning top block moves along the guide rod 11. Move the adjustment rod 19 to one side and make the U-shaped groove 131 on the positioning top block 13 misalign with the positioning protrusion 201 on the upper connecting plate 2. At this time, there is a large gap between the positioning top block 13 and the positioning protrusion 201, so that the backrest 24 can have enough room to swing backward. When the user leans against the backrest, the backward thrust is transmitted to the armrest 21. The armrest 21 rotates around the rear lower pivot 3. At the same time, the armrest 21 pulls the connecting plate 2 backward through the rear upper pivot 5. The connecting plate 2 then pulls the elastic arc plate 4 backward through the front pivot 6 to deform. Since the elastic arc plate 4 is an elastic plastic part, its rebound force supports the backward force of the human body. When the user releases the backward thrust, the elastic arc plate 4 returns to its original position, and at the same time forces the connecting plate 2, armrest 21 and backrest 24 to return to their original positions. When the user needs to fix the backrest while working at a desk, they can move the adjustment lever 19 backward. The adjustment seat 171 drives the rotating adjustment plate 17 to rotate clockwise along the rotating column 402. The rotating adjustment plate 17 pushes the moving block 12 to move synchronously to the other side of the adjustment lever 19 along the guide rod. Under the pushing force of the moving block 12, the positioning top block moves along the guide rod 11, and the U-shaped groove 131 on the positioning top block 13 aligns with the positioning protrusion 201 on the upper connecting plate 2. At this time, there is no gap between the positioning top block 13 and the positioning protrusion 201, so the backrest is in a locked state. Through the above principle, the locking and unlocking of the chair backrest can be completed, increasing the user's comfort. In addition, a five-claw base 8 is fixedly connected to the outside of the pneumatic lifter 7. A caster wheel 9 is installed on the bottom outer wall of the five-claw base 8. The chair can be moved to the moving position by the caster wheel 9 on the five-claw base 8, which facilitates the movement of the chair. This embodiment features two types of backrests: a soft-padded backrest 23 and a mesh backrest 24. All other parts are shared, thus greatly satisfying the needs of different commercial and civilian applications. Furthermore, the backrests are easy to replace, saving on research and development costs.

[0014] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A seat structure, characterized in that, It includes an elastic arc plate, with a bearing seat at the front end of the elastic arc plate, a front rotating shaft connected to the bearing seat, an upper connecting plate connected to the top of the elastic arc plate, and a rotatable connection between the rear of the elastic arc plate and the handrail. A pneumatic lifter is sleeved and installed at the bottom end of the elastic arc plate. The armrest has its bottom end rotatably connected to the elastic arc plate and the upper connecting plate, and its rear end is connected to the backrest. The backrest comes in two forms: a mesh backrest or a padded backrest; a connecting nut is provided at the front end of the backrest.

2. The seat structure according to claim 1, characterized in that, The top of the elastic arc plate is provided with a rotating column, and a rotating adjustment plate is rotatably connected to the outer side of the rotating column. An adjustment seat is provided on the outer wall of the top of the rotating adjustment plate, and an adjustment connecting rod is rotatably connected inside the adjustment seat. A pressing plate is provided on the outer wall of one end of the adjustment connecting rod corresponding to the position of the switch button.

3. The seat structure according to claim 2, characterized in that, A guide rod is fixedly connected inside the elastic arc plate, and a moving block is slidably connected to the guide rod, with one side of the moving block sleeved on the outer wall of the rotating adjustment plate.

4. A seat structure according to claim 3, characterized in that, A positioning block is slidably connected to the guide rod. A U-shaped groove is provided at the top of the positioning block. A return spring is slidably connected to one side of the guide rod near the elastic arc plate, and the other end of the return spring is sleeved with the positioning block.

5. A seat structure according to claim 4, characterized in that, A positioning protrusion is provided on the bottom outer wall of the upper connecting plate corresponding to the position of the U-shaped groove.

6. A seat structure according to claim 5, characterized in that, The lower rear end of the elastic arc plate is provided with a through hole, and a lower rear rotating shaft is installed through the through hole and rotatably connected to the first connecting hole at the bottom of the handrail. The bottom rear end of the connecting plate is provided with an ear block, and an upper rear rotating shaft is installed through the ear block and rotatably connected to the corresponding second connecting hole on the handrail.

7. A seat structure according to claim 6, characterized in that, The upper rear end of the armrest is provided with a third connecting hole, in which a fastener is inserted and fixedly connected to a nut provided on the mesh back or soft backrest.

8. A seat structure according to claim 1, characterized in that, The pneumatic lifter is fixedly connected to a five-claw base on its outer side, and a caster wheel is installed on the bottom outer wall of the five-claw base.

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