Swing type seat mechanical stretching device

Abstract

The utility model relates to a swing type seat mechanical stretching device which comprises two mechanical stretching units which are arranged in a bilateral symmetry mode, each mechanical stretching unit is composed of a seat frame supporting piece, a leg and foot assembly, a backrest rod and a transmission rod, the two mechanical stretching units are connected through a fixing assembly and a driving rod assembly, and the leg and foot assemblies are installed on the seat frame supporting pieces. The seat is characterized in that the driving rod assembly is composed of a first driving rod and a second driving rod, a quadrilateral supporting structure of the seat is formed by a seat frame supporting piece, a transmission rod, the upper half section of a second leg connecting rod and the lower half section of a backrest rod, swing plates which are symmetrically arranged are arranged on the two sides of the fixing assembly respectively, and a front swing rod and a rear swing rod are hinged to the upper portions of the front side and the rear side of each swing plate respectively. The lower end of the front swing rod and the lower end of the rear swing rod are hinged to the seat frame supporting piece. The swing mechanism has a swing function and is simple in structure, convenient to produce, install and maintain and low in cost.

Description

Technical Field

[0001] The present application relates to a mechanical extension device for a swinging seat, which is mainly applicable to the design of an electric seat with adjustable posture and swinging function. Background Art

[0002] The swing seat mechanical extension device in the prior art is usually fixed or rotatably installed on the seat base as the main supporting frame of the electric seat. The function is relatively simple, which affects the customer's comfort. The structure is usually relatively complex, which leads to inconvenience in production, installation and maintenance, and relatively high cost. Summary of the invention

[0003] The technical problem solved by the present application is to overcome the above-mentioned deficiencies in the prior art and to provide a swinging seat mechanical extension device with a swinging function.

[0004] The technical solution adopted by the present application to solve the above technical problems includes: a swing seat mechanical extension device, including two mechanical extension units symmetrically arranged on the left and right, each mechanical extension unit is composed of a seat frame support, a leg and foot assembly, a backrest rod, and a transmission rod, the two mechanical extension units are connected by a fixed assembly and a driving rod assembly, and the leg and foot assembly is installed on the seat frame support, and its characteristics are: the driving rod assembly is composed of a driving rod 1 and a driving rod 2, the seat frame support, the transmission rod, the upper half of the leg connecting rod 2, and the lower half of the backrest rod constitute a quadrilateral support structure of the seat, the quadrilateral support mechanism is driven by the action of the leg and foot assembly, thereby synchronously driving the backrest rod to move, reducing the number of parts and production, installation and maintenance steps, and relatively saving costs. The two sides of the fixed assembly are respectively provided with symmetrically arranged swing plates, and the upper parts of the front and rear sides of the swing plates are respectively hinged with a front swing rod and a rear swing rod, and the lower ends of the front swing rod and the rear swing rod are respectively hinged on the seat frame support, so that the swing seat mechanical extension device is installed on the fixed assembly as a whole and can swing in the front and rear directions, providing a swing function for users and improving the comfort of customers.

[0005] The front end of the seat frame support is hinged to the second leg link through the second hinge axis of the seat frame leg link, and the rear part of the seat frame support is hinged to the backrest rod through the seat frame backrest hinge axis. The backrest rod is provided with a backrest lying position limiter, which touches the seat frame support when lying down. The lower part of the backrest rod is hinged to the rear end of the transmission rod through the hinge axis of the backrest transmission rod, and the front end of the transmission rod is hinged to the middle part of the second leg link through the hinge axis of the transmission rod leg link.

[0006] The leg and foot assembly described in the present application is composed only of leg link 1, leg link 2, leg link 3, leg link 4, and a footrest. Drive rod 1 is fixedly connected to leg link 1, one end of leg link 1 is hinged to the seat frame support, the other end of leg link 1 is hinged to one end of leg link 3, the other end of leg link 3 is hinged to one end of the footrest, the other end of the footrest is hinged to one end of leg link 4, the middle part of leg link 4 is hinged to leg link 1, the other end of leg link 4 is hinged to one end of leg link 2, and the other end of leg link 2 is hinged to the seat frame support.

[0007] The present application may also provide a driving device, which adopts an electric push rod. One end of the driving device is hinged on the hinge shaft of driving rod 2, and the other end of the driving device is hinged on the hinge shaft of driving rod 1. The hinge shaft of driving rod 2 is located in the upper front of driving rod 2, and the hinge shaft of driving rod 1 is located below driving rod 1. The driving force of the driving device is basically consistent with the expansion and contraction direction of the leg and foot assembly, which is relatively labor-saving and energy-saving.

[0008] Compared with the prior art, the present invention has the following advantages and effects: it has a swing function, a simple structure, is easy to produce, install and maintain, and has a low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a three-dimensional schematic diagram of a sitting posture of an embodiment of the present application.

[0010] Figure 2 It is a side schematic diagram of the sitting posture of an embodiment of the present application.

[0011] Figure 3 It is a side view schematic diagram of the back swing in the sitting position of an embodiment of the present application.

[0012] Figure 4 It is a side schematic diagram of the sitting forward swing of the embodiment of the present application.

[0013] Figure 5 It is a three-dimensional schematic diagram of a lying position according to an embodiment of the present application.

[0014] Figure 6 It is a side schematic diagram of a lying position of an embodiment of the present application.

[0015] Figure 7 It is a side schematic diagram of the rear swing in the lying position according to an embodiment of the present application.

[0016] Figure 8 It is a side schematic diagram of the front swing in the lying position according to the embodiment of the present application.

[0017] In the figure:

[0018] Fixed component 1, drive rod assembly 2, drive rod one 21, drive rod one hinge axis 211, drive rod two 22, drive rod two hinge axis 221, leg and foot assembly 3, leg link one 31, leg link two 32, leg link three 33, leg link four 34, footrest 35, seat frame support 4, seat frame backrest hinge axis 41, seat frame leg link two hinge axis 42, backrest rod 5, backrest lying position limiter 51, backrest transmission rod hinge axis 52, swing plate 6, front swing rod 7, front swing rod upper hinge axis 71, front swing rod lower hinge axis 72, rear swing rod 8, rear swing rod upper hinge axis 81, rear swing rod lower hinge axis 82, transmission rod 9, transmission rod leg link two hinge axis 91. DETAILED DESCRIPTION

[0019] The present application is further described in detail below with reference to the accompanying drawings and examples. The following examples are explanations of the present application and the present application is not limited to the following examples. Figure 2 The right side is the front and the left side is the back.

[0020] See also Figures 1 to 8 The swing seat mechanical extension device of the embodiment of the present application includes two mechanical extension units symmetrically arranged on the left and right, each mechanical extension unit is composed of a seat frame support 4, a leg and foot assembly 3, a backrest rod 5, and a transmission rod 9. The two mechanical extension units are connected by a fixing assembly 1 and a driving rod assembly 2. One end of the driving device (not shown in the figure) is hinged on the driving rod second hinge shaft 221 of the driving rod second 22, and the other end of the driving device is hinged on the driving rod first hinge shaft 211 of the driving rod first 21 to drive the electric seat posture conversion. The driving rod first 2 1 is hinged with the leg connecting rod 31 of the leg and foot assembly 3 to control the expansion or folding of the leg and foot assembly 3. The design feature of the present application is that the two sides of the fixed assembly 1 are respectively provided with symmetrically arranged swing plates 6, and the upper parts of the front and rear sides of the swing plates 6 are respectively hinged with a front swing rod 7 and a rear swing rod 8, and the lower ends of the front swing rod 7 and the rear swing rod 8 are respectively hinged on the seat frame support 4, so that the swing seat mechanical extension device is installed as a whole on the fixed assembly 1 and can swing in the front and rear directions, providing a swing function for the user and improving the customer's comfort.

[0021] The front end of the seat frame support 4 is hinged to the leg link 2 32 through the seat frame leg link 2 hinge shaft 42, the rear part of the seat frame support 4 is hinged to the backrest rod 5 through the seat frame backrest hinge shaft 41, the backrest rod 5 is provided with a backrest lying position limiter 51, the lower part of the backrest rod 5 is hinged to the rear end of the transmission rod 9 through the backrest transmission rod hinge shaft 52, and the front end of the transmission rod 9 is hinged to the middle part of the leg link 2 32 through the transmission rod leg link 2 hinge shaft 91. The present application forms a quadrilateral support structure of the seat through the seat frame support 4, the transmission rod 9, the upper half of the leg link 2 32 (the transmission rod leg link 2 hinge shaft 91 to the seat frame leg link 2 hinge shaft 42), and the lower half of the backrest rod 5 (the seat frame backrest hinge shaft 41 to the backrest transmission rod hinge shaft 52), which saves the process flow, reduces the number of parts and installation and maintenance steps, and relatively saves costs.

[0022] The leg-foot assembly 3 described in the present application is composed of only a leg link 1 31, a leg link 2 32, a leg link 33, a leg link 4 34, and a footrest 35. The driving rod 1 21 is fixedly connected to the leg link 1 31, one end of the leg link 1 31 is hinged to the seat frame support 4, the other end of the leg link 1 31 is hinged to one end of the leg link 33, the other end of the leg link 33 is hinged to one end of the footrest 35, the other end of the footrest 35 is hinged to one end of the leg link 4 34, the middle part of the leg link 4 34 is hinged to the leg link 1 31, the other end of the leg link 4 34 is hinged to one end of the leg link 2 32, and the other end of the leg link 2 32 is hinged to the seat frame support 41.

[0023] The driving device of the present application can adopt an electric push rod, and the hinge shaft 221 of the driving rod 2 is located at the front and upper part of the driving rod 22, and the hinge shaft 211 of the driving rod 1 is located below the driving rod 1 21 (in the sitting position, it is located at the rear side below the driving rod 1 21, and in the lying position, it is moved forward by the driving device and is located at the front side below the driving rod 1 21). The driving force of the driving device is basically consistent with the expansion and contraction direction of the leg and foot assembly 3, which is relatively labor-saving and energy-saving.

[0024] See also Figure 2~Figure 4 , Figure 6~Figure 8 In the embodiment of the present application, whether in a sitting or lying position, since the entire swinging seat mechanical extension device is suspended on the swinging plate 6, the body fatigue and / or discomfort caused by sitting or lying for a long time can be relieved by swinging at any time, and the circulation of qi and blood can be increased, which is convenient and practical.

[0025] Any part not described in this application is prior art and will not be described in detail. Any simple deformation or combination of the technical features and technical solutions of this application should be considered to fall within the protection scope of this application.

Claims

1. A mechanical extension device for a swinging seat, comprising two mechanical extension units arranged symmetrically on the left and right, each mechanical extension unit consisting of a seat frame support, a leg and foot assembly, a backrest rod, and a transmission rod, the two mechanical extension units are connected by a fixing assembly and a driving rod assembly, and the leg and foot assembly is mounted on the seat frame support, wherein: The driving rod assembly is composed of driving rod 1 and driving rod 2. The seat frame support, transmission rod, upper half of leg link 2 and lower half of backrest rod constitute a quadrilateral supporting structure of the seat. Symmetrically arranged swing plates are respectively provided on both sides of the fixed assembly. Front and rear upper parts of the swing plates are respectively hinged with front swing rods and rear swing rods. The lower ends of the front swing rods and rear swing rods are respectively hinged to the seat frame support.

2. The mechanical extension device for a swing type seat according to claim 1, characterized in that: The front end of the seat frame support is hinged to the second leg link through the second hinge axis of the seat frame leg link, and the rear part of the seat frame support is hinged to the backrest rod through the seat frame backrest hinge axis. The backrest rod is provided with a backrest lying position limiter, which touches the seat frame support when lying down. The lower part of the backrest rod is hinged to the rear end of the transmission rod through the hinge axis of the backrest transmission rod, and the front end of the transmission rod is hinged to the middle part of the second leg link through the hinge axis of the transmission rod leg link.

3. The swing seat mechanical extension device according to claim 2 is characterized in that: The leg and foot assembly consists only of leg link 1, leg link 2, leg link 3, leg link 4, and a footrest. Drive rod 1 is fixedly connected to leg link 1, one end of leg link 1 is hinged to the seat frame support, the other end of leg link 1 is hinged to one end of leg link 3, the other end of leg link 3 is hinged to one end of the footrest, the other end of the footrest is hinged to one end of leg link 4, the middle part of leg link 4 is hinged to leg link 1, the other end of leg link 4 is hinged to one end of leg link 2, and the other end of leg link 2 is hinged to the seat frame support.

4. The mechanical extension device for a swing type seat according to claim 1, characterized in that: A driving device is also provided, which adopts an electric push rod. One end of the driving device is hinged on the hinge shaft of driving rod 2, and the other end of the driving device is hinged on the hinge shaft of driving rod 1. The hinge shaft of driving rod 2 is located in the front and upper part of driving rod 2, and the hinge shaft of driving rod 1 is located below driving rod 1.

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