Swing type seat mechanical stretching device

Abstract

The invention relates to a swing type seat mechanical stretching device which comprises two mechanical stretching units arranged in a bilateral symmetry mode, a fixing assembly and a connecting assembly, swing plates are arranged on the two sides of the fixing assembly respectively, the mechanical stretching units are symmetrically installed on the fixing assembly in a swing mode, and the two mechanical stretching units are connected through the connecting assembly. The folding chair is characterized in that the mechanical stretching unit is provided with a swing stopping mechanism, the swing stopping mechanism is connected with a backrest assembly of the mechanical stretching unit, and the backrest assembly controls the swing stopping mechanism to be in a folded state in the sitting posture and in an unfolded state in the TV posture-lying posture. The swing mechanism is simple in structure and convenient to operate, has relative safety, and is beneficial for preventing the possible risk that the swing function is abused.

Description

Technical Field

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

[0002] When the swing chair of the prior art is converted from a sitting position to a TV position or a lying position, a handle or a hand switch is required to lock the swing mechanism through the swing-stop mechanism. The structure is relatively complex and the operation is troublesome. 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 mechanical extension device for a swinging seat with a simple structure that can simultaneously turn on or off the anti-sway function when switching between a sitting position and a TV position through a backrest assembly with only one action.

[0004] The technical solution adopted by the present application to solve the above-mentioned technical problems includes: a swing-type seat mechanical extension device, comprising two mechanical extension units, a fixed assembly, and a connecting assembly, each symmetrically arranged on both sides of the fixed assembly. A swing plate is provided on each side of the fixed assembly. Each mechanical extension unit is symmetrically swingably mounted on the fixed assembly. The two mechanical extension units are interconnected by the connecting assembly. The mechanical extension unit is characterized in that: the mechanical extension unit is provided with a swing-stop mechanism, which is connected to the backrest assembly of the mechanical extension unit. The swing-stop mechanism is controlled by the backrest assembly to be in a retracted state in the sitting position, which does not affect the swing function of the present application, and in an open state in the TV position to reclining position, which limits the seat's swing function. Therefore, the swing-type seat mechanical extension device of the present application provides users with a swing function while sitting, improving user comfort. When switching to the TV position, the seat backrest only needs to be manually adjusted, and the backrest assembly can be used to simultaneously control the seat from swinging. This single action achieves the state transition between the sitting position and the TV position and the state adjustment of the swing-stop mechanism. The swing-stop function is always maintained during the transition from the TV position to the reclining position, preventing the seat from swinging excessively between the TV position and the reclining position, which may affect safety.

[0005] The yoke is connected to the seat frame by means of a hinged connection between the front and rear legs of the backrest and the seat frame, and the hinged connection between the front and rear legs of the backrest and the seat frame is connected to the seat frame by means of a hinged connection between the front and rear legs of the backrest and the seat frame. A stopper hinge shaft is provided, one end of the front stopper and the rear stopper are hinged on the stopper hinge shaft, the other end of the front stopper cooperates with the front swing rod, and the rear stopper is installed on the bracket through the rear stopper mounting shaft, and the other end of the rear stopper cooperates with the rear swing rod. One end of support rod one is hinged on the seat mounting plate, and a support rod one hinge shaft is provided in the middle of support rod one, one end of support rod two is hinged to support rod one through support rod one hinge shaft, and the other end of support rod two is hinged to the mounting plate through support rod two mounting pin. One end of the leg driving rod is hinged to the mounting plate through the leg driving rod mounting shaft, and the other end of the leg driving rod is hinged to the leg and foot assembly through the leg driving shaft, driving the leg and foot assembly to expand or retract, and the leg limit rod is installed on the mounting plate through the leg limit rod mounting shaft, and a leg limit rod limiting groove is provided at the front of the leg limit rod, and a limiting rivet is provided on the leg and foot assembly, and the limiting rivet is sleeved in the leg limit rod limiting groove. When the sitting position is converted to the TV position, the upper end of the backrest mounting rod tilts backward and downward, the upper end of the backrest adjustment rod moves backward and the lower end moves forward, driving the transmission rod to move forward, and the transmission rod controls the anti-swing mechanism to open through the anti-swing member hinge shaft, and the front anti-swing member and the rear anti-swing member respectively support the front swing bar and the rear swing bar to stop the swing function of the device of this application.

[0006] The leg and foot assembly includes leg link 1, leg link 2, leg link 3, leg link 4, a footrest, leg link 5, and leg link 6. One end of leg link 1 and leg link 2 are hinged on the seat mounting plate, 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 6, the other end of leg link 6 is hinged to one end of leg link 5, the middle part of leg link 5 is hinged to the middle part of leg link 3, the other end of leg link 5 is hinged to one end of leg link 4, the middle part of leg link 4 is hinged to the middle part of leg link 1, the other end of leg link 4 is hinged to the other end of leg link 2, a limiting rivet is provided on leg link 2, and the other end of the leg driving rod is hinged to leg link 2 through the leg driving shaft.

[0007] When in a lying position, the limit rivet is located at the frontmost position of the limit slot of the leg limit rod, limiting the maximum lying position of this application.

[0008] The seat mounting plate is provided with a TV posture lying position rear support, and the TV posture lying position rear support touches the support rod between the TV posture-lying position state to assist in supporting the rear pressure of the seat mounting plate.

[0009] The connecting assembly includes an anti-torsion tube, a front connecting tube, and a rear connecting tube. The anti-torsion tube is fixedly connected between the brackets of the two mechanical extension units, the front connecting tube is fixed between the front swing arms of the two mechanical extension units, and the rear connecting tube is fixed between the rear swing arms of the two mechanical extension units. The center lines of the anti-torsion tube, the front connecting tube, and the rear connecting tube are parallel to each other, and the cross-sections of the anti-torsion tube, the front connecting tube, and the rear connecting tube and the lines connecting the intersections of their respective center lines form an isosceles triangle, which increases the stability of the present application.

[0010] The backrest mounting rod is L-shaped.

[0011] The present application also provides a base, and the fixing component is installed on the base.

[0012] Compared with the prior art, the present application has the following advantages and effects: the present application has a simple structure, is easy to operate, is relatively safe, and helps to prevent the risks that may be faced by the abuse of the swing function. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a three-dimensional schematic diagram of the TV posture of Example 1 of the present application.

[0014] Figure 2 This is a schematic diagram of the inner side of the sitting posture of Example 1 of the present application.

[0015] Figure 3 This is a schematic diagram of the outer side of the sitting posture of Example 1 of the present application.

[0016] Figure 4 This is a schematic diagram of the inner side of the TV posture of Example 1 of the present application.

[0017] Figure 5 It is a schematic diagram of the outer side of the TV posture of Example 1 of the present application.

[0018] Figure 6 This is a schematic diagram of the inner side of the lying position of Example 1 of the present application.

[0019] Figure 7 This is a schematic diagram of the outer side of the lying position of Example 1 of the present application.

[0020] Figure 8 It is a schematic diagram of the inner side of the relevant components when the anti-sway mechanism of the embodiment of the present application is in the open state (the anti-sway mechanism limits the swing of the seat in the TV posture and lying position).

[0021] Figure 9 It is a schematic diagram of the inner side of the anti-sway mechanism and related components when the anti-sway mechanism of the embodiment of the present application is in a retracted state (the anti-sway mechanism does not restrict the swing of the seat when sitting).

[0022] Figure 10 This is a three-dimensional schematic diagram of the sitting posture of Example 2 of the present application.

[0023] In the picture: Base 1, fixing assembly 2, swing plate 21, leg and foot assembly 3, leg link 1 31, leg link 2 32, limit rivet 321, leg link 3 33, leg link 4 34, footrest 35, leg link 5 36, leg link 6 37, support assembly 4, bracket 40, mounting plate 41, mounting plate backrest adjustment rod hinge axis 411, support rod 1 42, support rod 1 hinge axis 421, support rod 2 43, support rod 2 mounting axis 431, seat mounting plate 5, TV posture lying rear support 51, backrest adjustment rod 6, backrest adjustment rod upper hinge axis 61, backrest adjustment rod lower hinge axis 62, front swing rod 7, front swing rod upper hinge axis 71, front swing rod lower hinge axis 72 , rear swing arm 8, rear swing arm upper hinge axis 81, rear swing arm lower hinge axis 82, transmission rod 9, anti-swing member hinge axis 91, backrest mounting rod 10, backrest mounting rod hinge axis 101, leg drive rod 11, leg drive axis 111, leg drive rod mounting axis 112, leg limit rod 12, leg limit rod limiting groove 121, leg limit rod mounting axis 122, anti-swing mechanism 13, front anti-swing member 131, rear anti-swing member 132, rear anti-swing member mounting axis 1321, positioning member 133, front anti-swing member positioning member hinge axis 1331, positioning member mounting axis 1332, connecting assembly 14, anti-torsion tube 141, front connecting tube 142, rear connecting tube 143. DETAILED DESCRIPTION

[0024] The present application is further described in detail below with reference to the accompanying drawings and examples. The following examples are for the purpose of explaining 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.

[0025] Example 1: See also Figures 1 to 9, embodiment 1 of the present application includes two mechanical extension units and a fixing component 2 and a connecting component 14 in a left-right symmetrical arrangement. The fixing component 2 is installed on the base 1, and a swing plate 21 is provided on both sides of the fixing component 2. Each mechanical extension unit is symmetrically swing-mounted on the fixing component 2 and is connected to each other through the connecting component 14. The design feature of the present application is that the mechanical extension unit is provided with a swing-stop mechanism 13, and the swing-stop mechanism 13 is connected to the backrest component (including the backrest mounting rod 10 and the backrest adjustment rod 6). The backrest adjustment rod 6 controls the swing-stop mechanism 13 to be in a folded state when sitting, which does not affect the swing function of the embodiment of the present application. It is in an open state in the TV posture and lying posture, limiting the swing function of the seat, so that the swing-type seat mechanical extension device of the present application provides users with a swing function when sitting, thereby improving the customer's comfort; when converting to the TV posture and lying posture, it is only necessary to manually adjust the seat backrest state, and the backrest adjustment rod 6 can be synchronously controlled to not allow swinging, thereby preventing the seat from swinging excessively in the TV posture and lying posture and affecting safety.

[0026] Each mechanical extension unit of the present application includes a leg and foot assembly 3, a support assembly 4, a seat mounting plate 5, a backrest adjustment rod 6, a front swing rod 7, a rear swing rod 8, a transmission rod 9, a backrest mounting rod 10, a leg driving rod 11, a leg limiting rod 12, and a swing-stop mechanism 13. The swing-stop mechanism 13 is provided with a front swing-stop part 131, a rear swing-stop part 132, and a positioning part 133. The support assembly 4 is swing-mounted on the fixed assembly 2 through the front swing rod 7 and the rear swing rod 8. The leg and foot assembly 3 is mounted on the seat mounting plate 5. The support assembly 4 includes a bracket 40, a mounting plate 41, a support rod 42, a support rod 2. 43. The bracket 40 is fixed to the mounting plate 41 as a whole. The mounting plate 41 is hinged to the upper ends of the front swing rod 7 and the rear swing rod 8. The lower ends of the front swing rod 7 and the rear swing rod 8 are respectively hinged to the bracket 40. The mounting plate 41 is hinged to the backrest adjustment rod 6 through the mounting plate backrest adjustment rod hinge shaft 411. The upper end of the backrest adjustment rod 6 is hinged to the backrest mounting rod 10 through the backrest adjustment rod upper hinge shaft 61. The backrest mounting rod 10 is hinged to the seat mounting plate 5 through the backrest mounting rod hinge shaft 101. The lower end of the backrest adjustment rod 6 is hinged to one end of the transmission rod 9 through the backrest adjustment rod lower hinge shaft 62. The transmission rod 9 is hinged to the lower end of the backrest adjustment rod. One end of the support rod 42 is provided with a hinge shaft 91, one end of the front and rear support rods 131 and 132 are hinged on the hinge shaft 91, the other end of the front support rod 131 cooperates with the front swing bar 7, and the rear support rod 132 is installed on the bracket 40 through the rear support rod mounting shaft 1321. The other end of the rear support rod 132 cooperates with the rear swing bar 8. One end of the support rod 1 42 is hinged on the seat mounting plate 5, and a support rod 1 hinge shaft 421 is provided in the middle of the support rod 1 42. One end of the support rod 2 43 is hinged to the support rod 1 42 through the support rod 1 hinge shaft 421, and the other end of the support rod 2 43 is hinged to the support rod 1 42 through the support rod 1 hinge shaft 421. The supporting rod second mounting pin 431 is hinged on the mounting plate 41, one end of the leg driving rod 11 is hinged on the mounting plate 41 through the leg driving rod mounting shaft 112, and the other end of the leg driving rod 11 is hinged to the leg connecting rod second 32 of the leg and foot assembly through the leg driving shaft 111, driving the leg and foot assembly 3 to expand or fold, and the leg limiting rod 12 is installed on the mounting plate 41 through the leg limiting rod mounting shaft 122. A leg limiting rod limiting groove 121 is provided at the front of the leg limiting rod 12, and a limiting rivet 321 is provided on the leg connecting rod second 32, and the limiting rivet 321 is inserted into the leg limiting rod limiting groove 121. When the seat is converted from a sitting position to a TV position, the upper end of the backrest mounting rod 10 tilts backward and downward, the upper end of the backrest adjustment rod 6 moves backward and the lower end moves forward, driving the transmission rod 9 to move forward, and the transmission rod 9 controls the anti-swing mechanism to open through the anti-swing member hinge shaft 91, and the front anti-swing member 131 and the rear anti-swing member 132 respectively support the front swing bar 7 and the rear swing bar 8 to stop the swing function of this embodiment.

[0027] The seat mounting plate 5 is provided with a TV posture lying rear support 51, which contacts the support rod 42 in the TV posture-lying position to assist in supporting the rear pressure of the seat mounting plate 5.

[0028] The leg and foot assembly 3 described in the present application includes a leg link 1 31, a leg link 2 32, a leg link 33, a leg link 4 34, a footrest 35, a leg link 5 36, and a leg link 6 37. One end of the leg link 1 31 and the leg link 2 32 are both hinged on the seat mounting plate 5, the other end of the leg link 1 31 is hinged to one end of the leg link 3 33, the other end of the leg link 3 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 6 37, the other end of the leg link 6 37 is hinged to one end of the leg link 5 36, the middle part of the leg link 5 36 is hinged to the middle part of the leg link 3 33, the other end of the leg link 5 36 is hinged to one end of the leg link 4 34, the middle part of the leg link 4 34 is hinged to the middle part of the leg link 1 31, and the other end of the leg link 4 34 is hinged to the other end of the leg link 2 32.

[0029] Example 2: The basic structure of Example 2 of the present application is the same as that of Example 1. The main difference is the connecting assembly 14. The connecting assembly of Example 1 only contains the front connecting pipe and the rear connecting pipe. Figure 10 The connecting assembly 14 of Example 2 includes an anti-torsion tube 141, a front connecting tube 142, and a rear connecting tube 143. The anti-torsion tube 141 is fixedly connected between the brackets 40 of the two mechanical stretching units, the front connecting tube 142 is fixed between the front swing bars 7 of the two mechanical stretching units, and the rear connecting tube 143 is fixed between the rear swing bars 8 of the two mechanical stretching units. Example 2 adds an anti-torsion tube relative to Example 1. The center lines of the anti-torsion tube 141, the front connecting tube 142, and the rear connecting tube 143 are parallel to each other and are not on the same plane. The cross sections of the anti-torsion tube 141, the front connecting tube 142, and the rear connecting tube 143 and the line connecting the intersection of their respective center lines form an isosceles triangle, which increases the stability of the present application.

[0030] In the embodiment of the present application, when the user is in a sitting position, the anti-sway mechanism 13 is in a folded state. Figure 3 、 Figure 9Because the entire swing-type seat mechanical extension device is suspended on the swing plate 21, it can swing forward and backward at any time to relieve physical fatigue and / or discomfort caused by prolonged sitting, improve blood circulation, and provide convenience and practicality. To switch to the TV position, the seat backrest can be manually adjusted (by pushing or pulling the backrest mounting rod). Simultaneously, the anti-sway mechanism 13 is adjusted, causing the upper end of the backrest mounting rod 10 to tilt backward and downward. The upper end of the backrest adjustment rod 6 moves backward and the lower end moves forward, driving the transmission rod 9 and the anti-sway member hinge shaft 91 forward. This, in turn, drives the front end of the front anti-sway member 131 forward to support the front swing rod 7. Furthermore, it causes the upper end of the rear anti-sway member 132 to rotate backward and downward about the rear anti-sway member mounting shaft 1321, supporting the rear swing rod 8, thereby stopping the swing function of this embodiment. The transition from the TV position to the sitting position is the reverse of the above process. This application realizes the state transition between the sitting position and the TV position of the seat and the state adjustment of the anti-sway mechanism in one action, and always maintains the anti-sway function during the transition between the TV position and the lying position, preventing the risks that may be caused by excessive swinging between the TV position and the lying position, such as imbalance of the center of gravity or collision with other objects.

[0031] Any part not described in this application is prior art and will not be described in detail. Any simple variation or combination of the technical features and technical solutions of this application should be considered to fall within the scope of protection of this application.

Claims

1. A swing-type seat mechanical extension device, comprising two symmetrically arranged mechanical extension units, a fixing assembly, and a connecting assembly, wherein a swing plate is provided on each side of the fixing assembly, each mechanical extension unit is symmetrically swingably mounted on the fixing assembly, and the two mechanical extension units are interconnected by the connecting assembly, characterized in that: The mechanical extension unit is provided with a sway-stop mechanism, which is connected to the backrest assembly of the mechanical extension unit. The backrest assembly controls the sway-stop mechanism to be in a folded state in a sitting position and in an open state in a TV position-lying position.

2. The mechanical extension device for a swing type seat according to claim 1, characterized in that: Each mechanical extension unit includes a leg and foot assembly, a support assembly, a seat mounting plate, a backrest assembly, a front swing rod, a rear swing rod, a transmission rod, a leg drive rod, a leg limit rod, and a swing-stop mechanism. The backrest assembly includes a backrest adjustment rod and a backrest mounting rod. The swing-stop mechanism is provided with a front swing stop part, a rear swing stop part, and a positioning part. The leg and foot assembly is mounted on the seat mounting plate. The support assembly includes a bracket, a mounting plate, a first support rod, and a second support rod. The bracket and the mounting plate are fixed as one body. The mounting plate is hinged to the upper ends of the front swing rod and the rear swing rod, and the lower ends of the front swing rod and the rear swing rod are hinged to the bracket respectively. The mounting plate is hinged to the backrest adjustment rod through the mounting plate backrest adjustment rod hinge shaft. The upper end of the backrest adjustment rod is hinged to the backrest mounting rod through the upper hinge shaft of the backrest adjustment rod. The backrest mounting rod is hinged to the seat mounting plate. The lower end of the backrest adjustment rod is hinged to one end of the transmission rod through the lower hinge shaft of the backrest adjustment rod. The other end of the rod is provided with a stopper hinge shaft, one end of the front stopper and the rear stopper are hinged on the stopper hinge shaft, the other end of the front stopper cooperates with the front swing rod, and the rear stopper is installed on the bracket through the rear stopper mounting shaft, and the other end of the rear stopper cooperates with the rear swing rod. One end of support rod one is hinged to the seat mounting plate, and a support rod one hinge shaft is provided in the middle of support rod one, one end of support rod two is hinged to support rod one through the support rod one hinge shaft, and the other end of support rod two is hinged to the mounting plate through the support rod two mounting pin. One end of the leg driving rod is hinged to the mounting plate through the leg driving rod mounting shaft, and the other end of the leg driving rod is hinged to the leg-foot assembly through the leg driving shaft. The leg limit rod is installed on the mounting plate through the leg limit rod mounting shaft. A leg limit rod limiting groove is provided at the front of the leg limit rod, and a limiting rivet is provided on the leg-foot assembly, and the limiting rivet is sleeved in the leg limit rod limiting groove.

3. The mechanical extension device for a swing type seat according to claim 2, characterized in that: The leg and foot assembly includes leg link 1, leg link 2, leg link 3, leg link 4, a footrest, leg link 5, and leg link 6. One end of leg link 1 and leg link 2 are hinged on the seat mounting plate, 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 6, the other end of leg link 6 is hinged to one end of leg link 5, the middle part of leg link 5 is hinged to the middle part of leg link 3, the other end of leg link 5 is hinged to one end of leg link 4, the middle part of leg link 4 is hinged to the middle part of leg link 1, the other end of leg link 4 is hinged to the other end of leg link 2, a limiting rivet is provided on leg link 2, and the other end of the leg driving rod is hinged to leg link 2 through the leg driving shaft.

4. The mechanical extension device for a swing seat according to claim 2, characterized in that: When in a lying position, the limit rivet is located at the frontmost position of the limit slot of the leg limit rod.

5. The mechanical extension device for a swing type seat according to claim 2, characterized in that: The seat mounting plate is provided with a TV posture lying position rear support, which touches the support rod when in the TV posture-lying position.

6. The mechanical extension device for a swing type seat according to claim 1, characterized in that: The connecting assembly includes an anti-torsion tube, a front connecting tube, and a rear connecting tube. The anti-torsion tube is fixedly connected between the brackets of the two mechanical extension units, the front connecting tube is fixed between the front swing arms of the two mechanical extension units, and the rear connecting tube is fixed between the rear swing arms of the two mechanical extension units. The center lines of the anti-torsion tube, the front connecting tube, and the rear connecting tube are parallel to each other, and the cross sections of the anti-torsion tube, the front connecting tube, and the rear connecting tube and the intersection lines of their respective center lines form an isosceles triangle.

7. The mechanical extension device for a swing type seat according to claim 2, characterized in that: The backrest mounting rod is L-shaped.

8. The mechanical extension device for a swing type seat according to claim 1, characterized in that: A base is also provided, and the fixing component is mounted on the base.

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