Chassis structure with seat-back synchro linkage

Abstract

The invention discloses a chassis structure with a seat-back synchronous linkage device, comprising a bottom plate, a chassis arranged below the bottom plate, a tail plate, a connecting rod block hinged to the front end of the chassis and to the front end of the bottom plate, a seat-back synchronous linkage device arranged in the chassis, and a locking mechanism arranged in the chassis; the seat-back synchronous linkage device comprises a first fulcrum shaft hinged to the rear end of the chassis and the tail plate, a first rotating shaft located in front of the first fulcrum shaft and hinged to the rear end of the bottom plate and the tail plate, and a notch groove is provided on the chassis; the seat-back synchronous linkage device also comprises a second fulcrum shaft hinged at the front end of the chassis, a third fulcrum shaft hinged to the front end of the chassis and the rear end of the connecting rod block, a second rotating shaft hinged to the front end of the connecting rod block and the front end of the bottom plate, and an elastic reset mechanism; the elastic reset mechanism comprises a first compression spring fixing rubber sleeved on the second fulcrum shaft, a second compression spring fixing rubber sleeved on the second rotating shaft, a retractable connecting shaft assembly, and a compression spring sleeved outside the connecting shaft assembly.

Description

Technical Field

[0001] The invention relates to the technical field of swivel chairs, in particular to a chassis structure with a seat-back synchronous linkage device. Background Art

[0002] Swivel chairs are widely used in people's work and life. Swivel chairs have functions such as lifting, tilting and rotating. Swivel chairs are mainly composed of chair legs, pneumatic rods, cylinders, chassis structure, seat and backrest, and the various functions of the swivel chair are mainly realized through the chassis structure. With the improvement of people's living standards, people's demand for the comfort of swivel chairs is also getting higher and higher. The function of seat-back synchronous linkage appears in the existing swivel chair, which means that the seat and backrest operate synchronously when tilting. However, the structure of the existing seat-back synchronous linkage device is cumbersome and complicated, with many parts, great difficulty in processing, low production efficiency, resulting in high production cost, and the structural design of the existing seat-back synchronous linkage device is not scientific and reasonable enough. When tilting, the user needs to exert a considerable force on the backrest in order to counteract his own weight acting on the seat, which affects the user's comfort and makes it difficult to tilt. In addition, the existing elastic reset mechanism sometimes has the problem of insufficient elasticity, which is prone to weightlessness, has safety hazards, and is generally comfortable.

[0003] Therefore, how to achieve a simple structure, scientific and reasonable design, few parts, automatically adjust the reclining elastic force according to the user's weight, easy and convenient reclining operation, the user can adjust the backrest and seat to obtain the best posture, strong comfort, and the elastic reset mechanism is full of elasticity to effectively prevent the occurrence of weightlessness, and the safety of the chassis structure with a seat-back synchronous linkage device is a technical problem that needs to be solved urgently in the industry. Summary of the invention

[0004] The main purpose of the present invention is to provide a chassis structure with a seat-back synchronous linkage device, aiming to achieve a chassis structure with a simple structure, scientific and reasonable design, few parts, and can automatically adjust the reclining elastic force according to the user's weight. The reclining operation is easy and the user can adjust the backrest and the seat to obtain the best posture. The comfort is strong, and the elastic reset mechanism is full of elasticity, which effectively prevents the occurrence of weightlessness. The safety of the chassis structure with a seat-back synchronous linkage device is high.

[0005] The invention provides a chassis structure with a seat-back synchronous linkage device, comprising a bottom plate fixedly arranged at the bottom of the seat and linked to the seat, a chassis arranged below the bottom plate, a tail plate arranged between the bottom plate and the chassis and linked to the backrest, a connecting rod block hinged to the front end of the chassis and hinged to the front end of the bottom plate, a seat-back synchronous linkage device arranged in the chassis, and a locking mechanism arranged in the chassis for keeping the back-seat synchronous linkage device in an initial state or a raised state; the seat-back synchronous linkage device comprises a first fulcrum axis hinged at the rear end of the chassis and the tail plate, a first rotating axis located in front of the first fulcrum axis and hinged to the rear end of the base plate and the tail plate, when the tail plate reclines with the reclining of the backrest, the first rotating axis rotates around the first fulcrum axis so as to drive the rear end of the base plate to move upward and backward, and a notch groove for the first rotating axis to move is provided on the chassis; the seat-back synchronous linkage device also comprises a second fulcrum axis hinged at the front end of the chassis The cam is an elastic member which is configured to move the second end of the base plate and the second end of the base plate, the second end of the base plate being arranged on a circle, the second end of the base plate being arranged on a circle, the second end of the base plate being arranged on a circle, and the second end of the base plate being arranged on a circle.

[0006] Preferably, a cone tube is installed on the chassis.

[0007] The present invention realizes a simple structure, scientific and reasonable design, few parts, and can automatically adjust the reclining elastic force according to the weight of the user. The reclining operation is easy and convenient. The user can configure and adjust the backrest and the seat to obtain the best posture. The comfort is strong, and the elastic reset mechanism is full of elasticity, which effectively prevents the occurrence of weightlessness. The chassis structure with a seat-back synchronous linkage device is highly safe. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is one of the three-dimensional structural schematic diagrams of an embodiment of a chassis structure with a seat back synchronous linkage device of the present invention;

[0009] Figure 2 The second three-dimensional structural schematic diagram of an embodiment of a chassis structure with a seat back synchronous linkage device of the present invention;

[0010] Figure 3It is a side structural schematic diagram of an embodiment of a chassis structure with a seat back synchronous linkage device of the present invention;

[0011] Figure 4 It is a schematic diagram of a three-dimensional structure explosion of an embodiment of a chassis structure with a seat back synchronous linkage device of the present invention;

[0012] Figure 5 The figure is a schematic diagram of the exploded structure of the side of an embodiment of a chassis structure with a seat back synchronous linkage device of the present invention.

[0013] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0014] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0015] Reference Figures 1 to 5 , an embodiment of the chassis structure with a seat-back synchronous linkage device of the present invention is proposed, comprising a base plate 101 fixedly arranged at the bottom of a seat and linked to the seat, a chassis 102 arranged below the base plate 101, a tail plate 103 arranged between the base plate 101 and the chassis 102 and linked to the backrest, a connecting rod block 104 hinged to the front end of the chassis 102 and the front end of the base plate 101, a seat-back synchronous linkage device arranged in the chassis 102, and a locking mechanism 105 arranged in the chassis 102 for keeping the seat-back synchronous linkage device in an initial state or a lifted state.

[0016] A cone tube 106 is installed on the chassis 102, and the lower end of the cone tube 106 is connected to a gas pressure rod.

[0017] The seat back synchronous linkage device includes a first fulcrum shaft 107 hinged on the rear end of the chassis 102 and the tail plate 103, and a first rotating shaft 108 located in front of the first fulcrum shaft 107 and hinged on the rear end of the base plate 101 and the tail plate 103. When the tail plate 103 reclines with the reclining of the backrest, the first rotating shaft 108 rotates around the first fulcrum shaft 107 to drive the rear end of the base plate 101 to move upward and backward, and the front end of the base plate 101 will also move upward and backward with a greater movement amplitude than the rear end of the base plate 101. The chassis 102 is provided with a notch groove 109 for the first rotating shaft 108 to move.

[0018] The seat back synchronous linkage device also includes a second fulcrum shaft 110 hinged at the front end of the chassis 102, a third fulcrum shaft 111 hinged at the front end of the chassis 102 and the rear end of the connecting rod block 104, a second rotating shaft 112 hinged at the front end of the connecting rod block 104 and the front end of the base plate 101, and also includes an elastic reset mechanism for resetting the base plate 101, the tail plate 103, and the connecting rod block 104.

[0019] The elastic reset mechanism includes a first compression spring fixing glue 113 sleeved on the second fulcrum shaft 110, a second compression spring fixing glue 114 sleeved on the second rotating shaft 112, a retractable connecting shaft assembly 115 connected between the first compression spring fixing glue 113 and the second compression spring fixing glue 114, and a compression spring 116 sleeved outside the connecting shaft assembly 115 and constrained between the first compression spring fixing glue 113 and the second compression spring fixing glue 114.

[0020] When the rear end of the bottom plate 101 moves upward and backward, it drives the front end of the bottom plate 101 to move upward and backward. The front end of the bottom plate 101 drives the second rotating shaft 112 to move upward and backward, so that the second rotating shaft 112 and the front end of the connecting rod block 104 rotate around the third fulcrum shaft 111. At the same time, the movement of the second rotating shaft 112 drives the second compression spring fixing glue 114 to move backward, thereby forcing the compression spring 116 to contract and generate elastic force. The seat back synchronous linkage device can automatically adjust the size of the reclining elastic force according to the weight of the user. During the reclining process, when the weight of the user is large, the tail plate 103 and the bottom plate 101 have a large force on the compression spring 116, and the more the compression spring 116 is compressed, the greater the rebound force, and the reaction force of the compression spring 116 on the tail plate 103 and the bottom plate 101 is also greater, so the reclining elastic force can be automatically adjusted according to the weight of the user. The elastic reset mechanism adopts a compression spring 116, which is a spiral spring that bears a positive pressure, can withstand strong pressure, and has a high elastic coefficient. When reclining, even when the user reclines to the maximum angle, the force applied by the user to the compression spring 116 is the greatest. The elastic force of the compression spring 116 of the elastic reset mechanism can easily cope with the user's force on the backrest and the bottom plate 101, and there will be no weightlessness, and the user is highly comfortable when reclining. The structure of the seat-back synchronous linkage device is simple, the design is scientific and reasonable, and there are few parts. The reclining elastic force can be automatically adjusted according to the user's weight. The reclining operation is easy and convenient. The user can adjust the backrest and the seat to obtain the best posture. It is comfortable, and the elastic reset mechanism is full of elasticity, which effectively prevents weightlessness and has high safety.

[0021] The seat-back synchronous linkage device allows the user to easily and comfortably perform reclining operations relative to his or her own weight. When the appropriate tilt angle is adjusted, the tilt angle can be locked by the locking mechanism 105. The user can use the seat-back synchronous linkage device to adjust the backrest and seat to obtain the best posture with high comfort.

[0022] The present invention realizes a simple structure, scientific and reasonable design, few parts, and can automatically adjust the reclining elastic force according to the weight of the user. The reclining operation is easy and convenient. The user can configure and adjust the backrest and the seat to obtain the best posture. The comfort is strong, and the elastic reset mechanism is full of elasticity, which effectively prevents the occurrence of weightlessness. The chassis structure with a seat-back synchronous linkage device is highly safe.

[0023] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structural transformation made by using the contents of the present invention description and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. Chassis structure with seat-back synchronous linkage device, characterized in that: It includes a bottom plate fixedly arranged at the bottom of the seat and linked to the seat, a chassis arranged below the bottom plate, a tail plate arranged between the bottom plate and the chassis and linked to the backrest, a connecting rod block hinged to the front end of the chassis and hinged to the front end of the bottom plate, a seat-back synchronous linkage device arranged in the chassis, and a locking mechanism arranged in the chassis for keeping the back-back synchronous linkage device in an initial state or a raised state; The seat back synchronous linkage device includes a first fulcrum shaft hinged to the rear end of the chassis and the tail board, and a first rotation shaft located in front of the first fulcrum shaft and hinged to the rear end of the bottom plate and the tail board. When the tail board reclines with the reclining of the backrest, the first rotation shaft rotates around the first fulcrum shaft to drive the rear end of the bottom plate to move upward and backward. A notch groove is provided on the chassis for the first rotation shaft to move; The seat back synchronous linkage device also includes a second fulcrum shaft hinged at the front end of the chassis, a third fulcrum shaft hinged at the front end of the chassis and the rear end of the connecting rod block, and a second rotating shaft hinged at the front end of the connecting rod block and the front end of the bottom plate, and also includes an elastic reset mechanism that resets the bottom plate, the tail plate and the connecting rod block; The elastic reset mechanism includes a first compression spring fixing rubber sleeved on the second fulcrum shaft, a second compression spring fixing rubber sleeved on the second rotating shaft, a retractable connecting shaft assembly connected between the first compression spring fixing rubber and the second compression spring fixing rubber, and a compression spring sleeved outside the connecting shaft assembly and constrained between the first compression spring fixing rubber and the second compression spring fixing rubber; When the rear end of the base plate moves upward and backward, it drives the front end of the base plate to move upward and backward. The front end of the base plate drives the second rotating shaft to move upward and backward, so that the second rotating shaft and the front end of the connecting rod block rotate around the third fulcrum axis. At the same time, the movement of the second rotating shaft drives the second compression spring fixing rubber to move backward, thereby forcing the compression spring to contract and generate elastic force.

2. The chassis structure with seat back synchronous linkage device according to claim 1, characterized in that: A cone tube is installed on the chassis.

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