Mechanical stretching device for footrest extension type rocking chair and rocking chair thereof

Abstract

The application relates to a foot-rest lengthened type rocking chair mechanical stretching device and a rocking chair. The foot-rest lengthened type rocking chair mechanical stretching device comprises two symmetrically arranged mechanical stretching units and a rear fixing rod, a front driving rod and a connecting frame. Each mechanical stretching unit is provided with a leg and foot assembly, a framework assembly, a front swinging rod and a rear swinging rod. The framework assembly is provided with a seat installation assembly, a backrest installation rod and a linkage rod. The middle part of the backrest installation rod is hingedly connected to the seat installation assembly. The lower end of the backrest installation rod is hingedly connected to the rear end of the linkage rod. The front end of the linkage rod is hingedly connected to the leg and foot assembly. The lower ends of the front swinging rod and the rear swinging rod are respectively hingedly connected to the seat installation assembly. The two rear swinging rods are fixedly connected through the rear fixing rod. The two ends of the front driving rod are respectively connected to the leg and foot assembly. The two ends of the connecting frame are fixedly arranged between the seat installation assemblies. The application has the advantages of simple structure, swinging function in any state and increased total length of the foot-rest.

Description

Technical Field

[0001] This application relates to a mechanical extension device for a footrest-extended swing chair and the swing chair thereof, which is mainly applicable to seat designs with back-and-forth swing function. Background Technology

[0002] The existing swing-type chair can be found in patent number CN202320836259.4, entitled "A mechanical extension device for barrier-free locking of swinging motion". In order to prevent the back-and-forth swinging in the lying position from taking up too much space and posing a certain risk, a locking mechanism is specially set to lock the swinging function. This affects the use of the swinging function by consumers when lying down and makes the structure relatively complex. In addition, its footrest is relatively short and is not suitable for consumers with larger stature. Summary of the Invention

[0003] The technical problem solved by this application is to overcome the above-mentioned deficiencies in the prior art and to provide a simple structure, a footrest extension type swing chair mechanical extension device and the swing chair thereof that can be swung at any time.

[0004] The technical solution adopted by this application to solve the above-mentioned technical problems includes: a mechanical extension device for a swing chair with extended leg rest. The mechanical extension device for a swing chair with extended leg rest includes two symmetrically arranged mechanical extension units and a rear fixed rod, a front drive rod, and a connecting frame connecting the two mechanical extension units. Each mechanical extension unit is provided with a leg assembly, a frame assembly, a front swing rod, and a rear swing rod. The frame assembly is provided with a seat mounting assembly, a backrest mounting rod, and a linkage rod. The middle part of the backrest mounting rod is hinged to the seat mounting assembly, the lower end of the backrest mounting rod is hinged to the rear end of the linkage rod, and the front end of the linkage rod is hinged to the leg assembly. The lower ends of the front swing rod and the rear swing rod are respectively hinged to the seat mounting assembly. The two rear swing rods are fixedly connected by the rear fixed rod. The two ends of the front drive rod are respectively fixedly connected to the leg assemblies of the two mechanical extension units. The connecting frame is fixedly installed between the seat mounting assemblies of the two mechanical extension units. The structure is relatively simple and does not affect the realization of the swing function.

[0005] The leg assembly described in this application includes leg link one, leg link two, leg link three, leg link four, a rear footrest, a front footrest, and a footrest control. One end of leg link one and leg link two are respectively hinged to the seat mounting assembly. The other end of leg link one is hinged to one end of leg link three. The other end of leg link two is hinged to one end of leg link four. The other end of leg link four is hinged to the rear footrest via a hinge axis. The rear footrest is hinged to leg link three via a hinge axis. The rear footrest is hinged to the footrest control via a hinge axis. The front footrest is hinged to the footrest control via a hinge axis. The front footrest is hinged to leg link three via a hinge axis. Leg link four is hinged to leg link one via a hinge axis. This application, through the interconnection between the rear footrest, the front footrest, and the footrest control, as well as the connection and positioning relationship with the other components of the leg assembly, enables the rear footrest and the front footrest to be spliced ​​into a combined footrest (extended footrest) when the leg assembly is unfolded, thereby increasing the total length of the footrest and expanding the applicability and comfort of the seat.

[0006] The leg assembly described in this application also includes a leg rest. The leg rest is hinged to the leg link four via a leg rest hinge shaft. A leg rest limiting rivet is provided on the leg link three, and a limiting groove is provided on the leg rest. The leg rest limiting rivet is fitted into the limiting groove. The leg rest is used to support part of the load on the user's legs when lying down, so that the center of gravity of the legs is relatively shifted backward, reducing the load on the footrest and preventing the risk of forward tilting that may be caused by excessive forward shift of the body's center of gravity when swinging.

[0007] The seat mounting assembly described in this application includes a seat mounting plate, a front seat support plate, and a rear seat support plate that are fixed together as one unit. The lower ends of the front swing arm and the rear swing arm are respectively hinged to the lower ends of the front seat support plate and the rear seat support plate.

[0008] This application also includes a push rod motor, one end of which is hinged to the connecting frame, and the other end of which is hinged to the front drive rod. The push rod motor drives the extension or retraction of the leg assembly.

[0009] This application also includes a chair with the above-mentioned extended footrest mechanical extension device, the chair including a chassis assembly and an extended footrest mechanical extension device, the extended footrest mechanical extension device being oscillatingly mounted on the chassis assembly via a front swing rod and a rear swing rod.

[0010] The chassis assembly has a side plate on each side, and the upper ends of the front swing arm and the rear swing arm are hinged to each side plate.

[0011] Compared with the prior art, this application has the following advantages and effects: simple structure, swing function can be used in any state, increased total length of footrest, and expanded applicability and comfort of the seat. Attached Figure Description

[0012] Figure 1 This is a three-dimensional schematic diagram of the sitting posture of the chair according to an embodiment of this application.

[0013] Figure 2 This is a side view of the chair posture according to an embodiment of this application.

[0014] Figure 3 This is a top view of the seating posture of the chair according to an embodiment of this application.

[0015] Figure 4 This is a three-dimensional schematic diagram of the reclining posture of the chair according to an embodiment of this application.

[0016] Figure 5 This is a side view of the reclining posture of the chair according to an embodiment of this application.

[0017] Figure 6 This is a top view of the reclining posture of the chair according to an embodiment of this application.

[0018] In the picture: Chassis assembly 1, side plate 11, front hinge shaft of side plate 111, rear hinge shaft of side plate 112, leg assembly 2, leg link 1 21, hinge shaft of leg link 1 and leg link 4 211, leg link 2 22, leg link 3 23, rear footrest of leg link 3 231, front footrest of leg link 3 232, hinge shaft of leg link 1 and leg link 3 233, footrest limiting rivet 234, leg link 4 24, rear footrest of leg link 4 241, leg link 4, footrest of leg link 4 242, footrest Rear component 25, footrest rear component footrest control hinge shaft 251, footrest front component 26, footrest front component footrest control hinge shaft 261, footrest control 27, leg rest 28, limit groove 281, frame assembly 3, seat mounting assembly 31, seat mounting plate 311, seat front support plate 312, seat rear support plate 313, backrest mounting rod 32, linkage rod 33, rear fixing rod 4, push rod motor 5, front swing rod 6, rear swing rod 7, front drive rod 8, front drive rod motor hinge shaft 81, connecting frame 9. Detailed Implementation

[0019] The present application will be further described in detail below with reference to the accompanying drawings and embodiments. These embodiments are illustrative of the present application, but the present application is not limited to them. Figure 2 The right side is the front, and the left side is the back.

[0020] See Figures 1-6The extended-length swing chair mechanical extension device described in this application embodiment includes two symmetrically arranged mechanical extension units and a rear fixed rod 4, a front drive rod 8, and a connecting frame 9 connecting the two mechanical extension units. Each mechanical extension unit is provided with a leg assembly 2, a frame assembly 3, a front swing rod 6, and a rear swing rod 7. The frame assembly 3 is provided with a seat mounting assembly 31, a backrest mounting rod 32, and a linkage rod 33. The backrest mounting rod 32 is hinged to the seat mounting assembly 31 at the middle, and the lower end of the backrest mounting rod 32 is hinged to the rear end of the linkage rod 33. The front end of the linkage rod 33 is hinged to the leg assembly 2. The lower ends of the front swing rod 6 and the rear swing rod 7 are respectively hinged to the seat mounting assembly 31, thereby allowing the frame assembly 3 to be mounted on the front swing rod 2. The rear swing rod 3 can swing back and forth. The two rear swing rods 3 are fixedly connected by the rear fixed rod 4. The two ends of the front drive rod 8 are fixedly connected to the leg components 2 of the two mechanical extension units respectively. The connecting frame 9 is installed between the seat mounting components 31 of the two mechanical extension units. One end of the push rod motor 5 is hinged to the connecting frame 9, and the other end of the push rod motor 5 is hinged to the front drive rod 8. The push rod motor 5 drives the extension or retraction of the leg components 2 without affecting the swing function. The structure is relatively simple and improves the customer experience.

[0021] The leg assembly 2 described in this application includes a leg link 1 21, a leg link 22, a leg link 3 23, a leg link 4 24, a footrest rear piece 25, a footrest front piece 26, and a footrest control 27. One end of the leg link 1 21 and the leg link 22 are respectively hinged to the front of the seat mounting plate 311. The other end of the leg link 1 21 is hinged to one end of the leg link 3, and the other end of the leg link 22 is hinged to one end of the leg link 4 24. The other end of the leg link 4 24 is connected to the footrest rear piece via a hinge shaft 241. Part 25 is hinged. The rear part 25 of the footrest is hinged to the third leg link 23 via the hinge shaft 231 of the rear part leg link 3. The rear part 25 of the footrest is hinged to the foot control 27 via the foot control hinge shaft 251 of the rear part footrest. The front part 26 of the footrest is hinged to the foot control 27 via the foot control hinge shaft 261 of the front part footrest. The front part 26 of the footrest is hinged to the third leg link 23 via the hinge shaft 232 of the front part leg link 3. The fourth leg link 24 is hinged to the first leg link 21 via the hinge shaft 211 of the first leg link 4. This application utilizes the interconnection between the rear footrest 25, the front footrest 26, and the footrest control 27, as well as the positioning relationship with the remaining components of the leg assembly, to enable the rear footrest 25 and the front footrest 26 to be assembled into a combined footrest (extended footrest) in the unfolded state of the leg assembly 2. This increases the total length of the footrest, expands the applicability and comfort of the seat.

[0022] The leg assembly 2 described in this application is further provided with a leg rest 28. The leg rest 28 is hinged to the leg link 4 24 via the leg rest hinge shaft 242. The leg link 3 23 is provided with a leg rest limiting rivet 234. The leg rest 28 is provided with a limiting groove 281. The leg rest limiting rivet 234 is fitted into the limiting groove 281. The leg rest 28 is used to support part of the load on the user's legs when lying down, so that the center of gravity of the legs is relatively shifted backward, reducing the load on the footrest (including the footrest rear piece 25 and the footrest front piece 26), and preventing the risk of forward tilting that may be caused by excessive forward shift of the body's center of gravity when swinging.

[0023] The seat mounting assembly 31 described in this application includes a seat mounting plate 311, a front seat support plate 312, and a rear seat support plate 313 fixed together. The lower ends of the front swing rod 6 and the rear swing rod 7 are respectively hinged to the lower ends of the front seat support plate 312 and the rear seat support plate 313.

[0024] This application also includes a chair with the above-mentioned extended footrest mechanical extension device. The chair includes a chassis assembly 1 and an extended footrest mechanical extension device, which is oscillatingly mounted on the chassis assembly 1 via a front swing rod 6 and a rear swing rod 7.

[0025] The chassis assembly 1 has a side plate 11 on each side, and the upper ends of the front swing rod 6 and the rear swing rod 7 are respectively hinged to each side plate 11.

[0026] The unfolding process of the leg assembly 2 in this application is as follows: When the user is seated and wants the leg assembly 2 to unfold, the controller (not shown in the figure) activates the push rod motor 5. The push rod motor 5 drives the front drive rod 8 to extend forward, causing the lower end of the leg connecting rod 21 to move forward, thereby unfolding the entire leg assembly 2 forward. The rear footrest 25 and the front footrest 26 gradually form a complete footrest. The leg rest 28 moves upward, and the leg connecting rod 22 drives the linkage rod 33 to move forward, causing the lower end of the backrest mounting rod 32 connected to the linkage rod 33 to move forward. The upper end of the backrest mounting rod 32 tilts backward, forming... Figure 5 The lying position is shown. The process of returning from a lying position to a sitting position is similar.

[0027] The embodiments of this application can swing in any state (sitting, lying down, or a posture between sitting and lying down).

[0028] The parts not described in detail in this application are all prior art and will not be described in detail here.

Claims

1. A mechanical extension device for a swing chair with extended leg rest, comprising two symmetrically arranged mechanical extension units and a rear fixed rod, a front drive rod, and a connecting frame connecting the two mechanical extension units. Each mechanical extension unit is provided with a leg assembly, a frame assembly, a front swing rod, and a rear swing rod. The frame assembly is provided with a seat mounting assembly, a backrest mounting rod, and a linkage rod. The backrest mounting rod is hinged to the seat mounting assembly at its center. The device is characterized by: The lower end of the backrest mounting rod is hinged to the rear end of the linkage rod, the front end of the linkage rod is hinged to the leg assembly, the lower ends of the front swing rod and the rear swing rod are respectively hinged to the seat mounting assembly, the two rear swing rods are fixedly connected by the rear fixed rod, the two ends of the front drive rod are respectively fixedly connected to the leg assemblies of the two mechanical extension units, and the connecting frame is fixedly installed between the seat mounting assemblies of the two mechanical extension units.

2. The mechanical extension device for the leg rest type swing chair according to claim 1, characterized in that: The leg assembly includes leg link one, leg link two, leg link three, leg link four, rear footrest, front footrest, and footrest control. One end of leg link one and leg link two are respectively hinged to the seat mounting assembly. The other end of leg link one is hinged to one end of leg link three. The other end of leg link two is hinged to one end of leg link four. The other end of leg link four is hinged to the rear footrest via a hinge axis. The rear footrest is hinged to leg link three via a hinge axis. The rear footrest is hinged to the footrest control via a hinge axis. The front footrest is hinged to the footrest control via a hinge axis. The front footrest is hinged to leg link three via a hinge axis. Leg link four is hinged to leg link one via a hinge axis.

3. The mechanical extension device for the leg rest type swing chair according to claim 2, characterized in that: The leg assembly is also provided with a leg rest, which is hinged to the leg connecting rod four via a leg rest hinge shaft. The leg connecting rod three is provided with a leg rest limiting rivet, and the leg rest is provided with a limiting groove. The leg rest limiting rivet is fitted into the limiting groove.

4. The mechanical extension device for the leg rest type swing chair according to claim 1, characterized in that: The seat mounting assembly includes a seat mounting plate, a front seat support plate, and a rear seat support plate that are fixed together. The lower ends of the front swing arm and the rear swing arm are respectively hinged to the lower ends of the front seat support plate and the rear seat support plate.

5. The mechanical extension device for the leg rest extended type swing chair according to claim 1, characterized in that: It is also equipped with a push rod motor, one end of which is hinged to the connecting frame, and the other end of which is hinged to the front drive rod.

6. A type of armchair, characterized by: The chair includes a chassis assembly and a footrest extension mechanism as described in any one of claims 1 to 5. The footrest extension mechanism is oscillatingly mounted on the chassis assembly via a front swing arm and a rear swing arm.

7. The chair according to claim 6, characterized in that: The chassis assembly has a side plate on each side, and the upper ends of the front swing arm and the rear swing arm are hinged to each side plate.

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