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 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] This application relates to a swing-type seat mechanical extension device, which is mainly applicable to the design of electric seats with adjustable posture and swing function. Background Technology

[0002] Existing swing seats require a handle or buckle switch to lock the swing mechanism through an anti-swing mechanism when changing from a sitting to a TV position or a reclining position. This is relatively complex and cumbersome to operate. 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, swing-type seat mechanical extension device that requires only one action to simultaneously open or close the anti-sway function when switching between sitting and TV positions via the backrest assembly.

[0004] The technical solution adopted by this application to solve the above-mentioned technical problems includes: a swing-type seat mechanical extension device, comprising two mechanical extension units symmetrically arranged on the left and right, a fixing component, and a connecting component. Swing plates are respectively provided on both sides of the fixing component. Each mechanical extension unit is symmetrically swing-mounted on the fixing component. The two mechanical extension units are connected to each other through the connecting component. The characteristic feature is that: each mechanical extension unit is provided with an anti-sway mechanism, which is connected to the backrest component of the mechanical extension unit. The backrest component controls the anti-sway mechanism to be in a retracted state when in a sitting position, not affecting the swing function of this application. When in a TV position to a reclining position, it is in an open state, restricting the seat's swing function. Thus, this swing-type seat mechanical extension device provides users with a swing function while sitting, improving user comfort. When switching to a TV position, only the seat backrest state needs to be manually adjusted, and the backrest component can simultaneously control the seat to prevent swinging. One action achieves the state transition between the sitting and TV positions, as well as the state adjustment of the anti-sway mechanism. The anti-sway function is maintained throughout the TV-to-reclining position transition, preventing excessive swinging between the TV and reclining positions from affecting safety.

[0005] Each mechanical extension unit in this application includes a leg assembly, a support assembly, a seat mounting plate, a backrest assembly, a front swing arm, a rear swing arm, a transmission rod, a leg drive rod, a leg limit rod, and an anti-sway mechanism. The backrest assembly includes a backrest adjustment rod and a backrest mounting rod. The anti-sway mechanism includes a front anti-sway component, a rear anti-sway component, and a positioning component. The leg 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 together. The mounting plate is hinged to the upper ends of the front and rear swing arms. The lower ends of the front and rear swing arms are respectively hinged to the bracket. The mounting plate is hinged to the backrest adjustment rod via a hinge shaft. The upper end of the backrest adjustment rod is hinged to the backrest mounting rod via an upper hinge shaft. 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 via a lower hinge shaft. The other end of the transmission rod is provided with... The system includes a rocker arm with hinge shafts for anti-sway components. One end of both the front and rear rocker arms is hinged to these shafts. The other end of the front rocker arm engages with the front rocker arm. The rear rocker arm is mounted on a bracket via a rear rocker arm mounting shaft, and its other end engages with the rear rocker arm. One end of support rod one is hinged to the seat mounting plate, and a support rod one hinge shaft is located in the middle of support rod one. One end of support rod two is hinged to support rod one via the support rod one hinge shaft, and the other end of support rod two is hinged to the mounting plate via a support rod two mounting pin. One end of the leg drive rod is hinged to the mounting plate via a leg drive rod mounting shaft, and the other end of the leg drive rod is hinged to the leg assembly via a leg drive shaft, driving the leg assembly to extend or retract. A leg limit rod is mounted on the mounting plate via a leg limit rod mounting shaft, and a leg limit rod limit groove is located at the front of the leg limit rod. Limit rivets are installed on the leg assembly, and these rivets are fitted into the leg limit rod limit grooves. When the sitting posture is changed to the TV posture, 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. The transmission rod controls the anti-sway mechanism to open through the anti-sway hinge shaft. The front anti-sway and rear anti-sway are respectively pressed against the front swing rod and the rear swing rod, stopping the swing function of the device in this application.

[0006] The leg assembly includes leg link 1, leg link 2, leg link 3, leg link 4, footrest, leg link 5, and leg link 6. One end of leg link 1 and leg link 2 are hinged to 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 limit rivet is provided on leg link 2. The other end of the leg drive rod is hinged to leg link 2 through a leg drive shaft.

[0007] When in a lying position, the limiting rivet is located at the foremost position of the leg limiting rod limiting groove, limiting the maximum range of the lying position of this application.

[0008] The seat mounting plate is equipped with a TV-position reclining rear support. When the TV-position and reclining states are in contact, the TV-position reclining rear support touches the support rod to assist in supporting the pressure at the rear 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 supports of the two mechanical extension units. The front connecting tube is fixed between the front swing arms of the two mechanical extension units. 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. The intersection points of the cross-sections of the anti-torsion tube, the front connecting tube, and the rear connecting tube with their respective center lines form an isosceles triangle, which increases the stability of this application.

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

[0011] This application also includes a base, on which a fixing component is mounted.

[0012] Compared with the prior art, this application has the following advantages and effects: the structure of this application is simple, the operation is convenient, and it has relative safety, which helps to prevent the risks that may be faced by the abuse of the swing function. Attached Figure Description

[0013] Figure 1 This is a three-dimensional schematic diagram of the TV pose of Embodiment 1 of this application.

[0014] Figure 2 This is a schematic diagram of the inner side of the seated posture in Embodiment 1 of this application.

[0015] Figure 3 This is a schematic diagram of the sitting posture from the outside of Embodiment 1 of this application.

[0016] Figure 4 This is a schematic diagram of the inner side of the TV posture in Embodiment 1 of this application.

[0017] Figure 5 This is a schematic diagram of the TV pose outside of Embodiment 1 of this application.

[0018] Figure 6 This is a schematic diagram of the inner side of the lying position in Embodiment 1 of this application.

[0019] Figure 7 This is a schematic diagram of the lying position from the outside in Embodiment 1 of this application.

[0020] Figure 8 This is a schematic diagram of the inner side of the anti-sway mechanism and related components when the anti-sway mechanism is in the open state (the anti-sway mechanism restricts the swaying of the seat in the TV posture or reclining posture) according to the embodiments of this application.

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

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

[0023] In the picture:

[0024] 1. Base; 2. Fixing assembly; 21. Swing plate; 3. Leg assembly; 3. Leg link 1; 31. Leg link 2; 32. Limiting 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 shaft; 411. Support rod 1; 42. Support rod 1 hinge shaft; 421. Support rod 2; 43. Support rod 2 mounting shaft; 431. Seat mounting plate; 5. TV posture reclining back support; 51. Backrest adjustment rod; 6. Backrest adjustment rod upper hinge shaft; 61. Backrest adjustment rod lower hinge shaft; 62. Front swing rod; 7. Front swing rod upper hinge shaft; 71. Front swing rod lower hinge shaft; 72. 8. Rear swing arm, 81. Upper hinge shaft of rear swing arm, 82. Lower hinge shaft of rear swing arm, 9. Transmission rod, 91. Hinge shaft of anti-sway component, 10. Backrest mounting rod, 101. Hinge shaft of backrest mounting rod, 11. Leg drive rod, 111. Leg drive rod mounting shaft, 112. Leg limit rod, 12. Leg limit rod limit groove, 122. Leg limit rod mounting shaft, 13. Anti-sway mechanism, 131. Front anti-sway component, 132. Rear anti-sway component mounting shaft, 1321. Positioning component, 133. Hinge shaft of front anti-sway component positioning component, 1331. Positioning component mounting shaft, 1332. Connecting assembly, 14. Anti-torsion tube, 141. Front connecting tube, 142. Rear connecting tube, 143. Detailed Implementation

[0025] 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.

[0026] Example 1:

[0027] See Figures 1-9Embodiment 1 of this application includes two mechanical extension units symmetrically arranged on the left and right, a fixing component 2, and a connecting component 14. The fixing component 2 is mounted on the base 1, and swing plates 21 are respectively provided on both sides of the fixing component 2. Each mechanical extension unit is symmetrically swinging and mounted on the fixing component 2 and connected to each other through the connecting component 14. The design feature of this application is that the mechanical extension unit is provided with an anti-sway mechanism 13. The anti-sway 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 anti-sway mechanism 13 to be in a retracted state when sitting, which does not affect the swing function of this embodiment. When in the TV position and reclining position, it is in an open state, which restricts the swing function of the seat. Thus, the swing-type seat mechanical extension device of this application provides users with a swing function when sitting, improving the user's comfort. When switching to the TV position and reclining position, only the backrest state needs to be manually adjusted, and the backrest adjustment rod 6 can be used to control the swing to prevent excessive swinging of the seat in the TV position and reclining position, thus preventing it from affecting safety.

[0028] Each mechanical extension unit in this application includes a leg 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 drive rod 11, a leg limiting rod 12, and an anti-sway mechanism 13. The anti-sway mechanism 13 is provided with a front anti-sway member 131, a rear anti-sway member 132, and a positioning member 133. The support assembly 4 is oscillatingly mounted on the fixed assembly 2 via the front swing rod 7 and the rear swing rod 8. The leg 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, and a support rod. 2.43, bracket 40 and mounting plate 41 are fixed as one piece. Mounting plate 41 is hinged to the upper ends of front swing arm 7 and rear swing arm 8. The lower ends of front swing arm 7 and rear swing arm 8 are respectively hinged to bracket 40. Mounting plate 41 is hinged to backrest adjustment rod 6 through mounting plate backrest adjustment rod hinge shaft 411. The upper end of backrest adjustment rod 6 is hinged to backrest mounting rod 10 through backrest adjustment rod upper hinge shaft 61. Backrest mounting rod 10 is hinged to seat mounting plate 5 through backrest mounting rod hinge shaft 101. The lower end of backrest adjustment rod 6 is hinged to one end of transmission rod 9 through backrest adjustment rod lower hinge shaft 62. Transmission rod 9 is also hinged to... One end is provided with a rocker arm hinge shaft 91. One end of the front rocker arm 131 and the rear rocker arm 132 are both hinged to the rocker arm hinge shaft 91. The other end of the front rocker arm 131 cooperates with the front rocker arm 7. The rear rocker arm 132 is mounted on the bracket 40 through the rear rocker arm mounting shaft 1321. The other end of the rear rocker arm 132 cooperates with the rear rocker arm 8. One end of the support rod 42 is hinged to the seat mounting plate 5. The middle of the support rod 42 is provided with the support rod hinge shaft 421. One end of the support rod 43 is hinged to the support rod 42 through the support rod hinge shaft 421. The other end of the support rod 43 is connected to the support rod 42 through the support rod hinge shaft 421. The second support rod is hinged to the mounting plate 41 by the mounting pin 431. One end of the leg drive rod 11 is hinged to the mounting plate 41 by the leg drive rod mounting shaft 112, and the other end of the leg drive rod 11 is hinged to the second leg connecting rod 32 of the leg assembly by the leg drive shaft 111, which drives the leg assembly 3 to unfold or retract. The leg limiting rod 12 is mounted on the mounting plate 41 by the leg limiting rod mounting shaft 122. The front of the leg limiting rod 12 is provided with a leg limiting rod limiting groove 121. The second leg connecting rod 32 is provided with a limiting rivet 321, which is fitted into the leg limiting rod limiting groove 121. When the seat changes 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. The transmission rod 9 controls the anti-sway mechanism to open through the anti-sway hinge shaft 91. The front anti-sway member 131 and the rear anti-sway member 132 respectively press against the front swing rod 7 and the rear swing rod 8, stopping the swing function of this embodiment.

[0029] The seat mounting plate 5 is provided with a TV-position reclining rear support 51. When in the TV-position reclining position, the rear support 51 contacts the support rod 42 to assist in supporting the pressure at the rear of the seat mounting plate 5.

[0030] The leg assembly 3 described in this application includes leg link 1 31, leg link 2 32, leg link 33, leg link 4 34, footrest 35, leg link 5 36, and leg link 6 37. One end of leg link 1 31 and leg link 2 32 are hinged to the seat mounting plate 5. The other end of leg link 1 31 is hinged to one end of leg link 33. The other end of leg link 33 is hinged to one end of footrest 35. The other end of footrest 35 is hinged to one end of leg link 6 37. The other end of leg link 6 37 is hinged to one end of leg link 5 36. The middle part of leg link 5 36 is hinged to the middle part of leg link 33. The other end of leg link 5 36 is hinged to one end of leg link 4 34. The middle part of leg link 4 34 is hinged to the middle part of leg link 1 31. The other end of leg link 4 34 is hinged to the other end of leg link 2 32.

[0031] Example 2:

[0032] The basic structure of Embodiment 2 of this application is the same as that of Embodiment 1, the main difference being the connecting component 14. The connecting component in Embodiment 1 only includes a front connecting pipe and a rear connecting pipe. (See [link]). Figure 10 The connecting component 14 in Embodiment 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 supports 40 of the two mechanical extension units. The front connecting tube 142 is fixed between the front swing arms 7 of the two mechanical extension units. The rear connecting tube 143 is fixed between the rear swing arms 8 of the two mechanical extension units. Embodiment 2 adds an anti-torsion tube compared to Embodiment 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 not on the same plane. The lines connecting the intersection points of the cross sections of the anti-torsion tube 141, the front connecting tube 142, and the rear connecting tube 143 with their respective center lines form an isosceles triangle, which increases the stability of this application.

[0033] In this embodiment of the application, when the user is in a seated position, the anti-sway mechanism 13 is in a retracted state. (See attached image.) Figure 3 , Figure 9Since the entire swing-type seat mechanical extension device is suspended on the swing plate 21, it can swing back and forth at any time to relieve physical fatigue and / or discomfort caused by prolonged sitting, increase blood circulation, and is convenient and practical. When switching to the TV posture, it is only necessary to manually adjust the seat back (push and pull the backrest mounting rod). While adjusting the seat posture, the anti-sway mechanism 13 is adjusted, so that 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 and the anti-sway hinge shaft 91 to move forward. On the one hand, it drives the front end of the front anti-sway member 131 to move forward and press against the front swing rod 7. On the other hand, it causes the upper end of the rear anti-sway member 132 to rotate backward and downward around the rear anti-sway member mounting shaft 1321 and press against the rear swing rod 8, stopping the swing function of this embodiment. The process is reversed when changing from the TV posture to the sitting posture. This application achieves the state transition between seated and TV positions with a single action, while also adjusting the state of the anti-sway mechanism. It maintains the anti-sway function throughout the transition between TV and reclining positions, preventing risks that may be caused by excessive swaying between TV and reclining positions, such as loss of balance or collision with other objects.

[0034] All parts not described in this application are prior art and will not be detailed further. Any simple modifications or combinations of the technical features and solutions of this application shall be considered to fall within the protection scope of this application.

Claims

1. A swing-type seat mechanical extension device, comprising two mechanical extension units symmetrically arranged on the left and right, a fixing component, and a connecting component, wherein swing plates are respectively provided on both sides of the fixing component, each mechanical extension unit is symmetrically swing-mounted on the fixing component, and the two mechanical extension units are connected to each other through the connecting component, characterized in that: The mechanical extension unit is equipped with an anti-sway mechanism, which is connected to the backrest assembly of the mechanical extension unit. The backrest assembly controls the anti-sway mechanism to be in a retracted state when sitting and in an open state when in a TV-reclining position.

2. The swing-type seat mechanical extension device according to claim 1, characterized in that: Each mechanical extension unit includes a leg assembly, a support assembly, a seat mounting plate, a backrest assembly, a front swing arm, a rear swing arm, a transmission rod, a leg drive rod, a leg limit rod, and an anti-sway mechanism. The backrest assembly includes a backrest adjustment rod and a backrest mounting rod. The anti-sway mechanism includes a front anti-sway component, a rear anti-sway component, and a positioning component. The leg 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 together. The mounting plate is hinged to the upper ends of the front and rear swing arms. The lower ends of the front and rear swing arms are respectively hinged to the bracket. The mounting plate is hinged to the backrest adjustment rod via a hinge shaft. The upper end of the backrest adjustment rod is hinged to the backrest mounting rod via an upper hinge shaft. The lower end of the backrest adjustment rod is hinged to one end of the transmission rod via a lower hinge shaft. The other end of the transmission rod is provided with a stop. The swing arm has a hinge shaft, with one end of both the front and rear stop swing arms hinged to the hinge shaft. The other end of the front stop swing arm engages with the front swing arm. The rear stop swing arm is mounted on the bracket via a rear stop swing arm mounting shaft, and the other end engages with the rear swing arm. One end of support rod one is hinged to the seat mounting plate, and a support rod one hinge shaft is located in the middle of support rod one. One end of support rod two is hinged to support rod one via the support rod one hinge shaft, and the other end of support rod two is hinged to the mounting plate via a support rod two mounting pin. One end of the leg drive rod is hinged to the mounting plate via a leg drive rod mounting shaft, and the other end of the leg drive rod is hinged to the leg assembly via a leg drive shaft. The leg limit rod is mounted on the mounting plate via a leg limit rod mounting shaft, and a leg limit rod limit groove is located at the front of the leg limit rod. A limit rivet is located on the leg assembly, and the limit rivet is fitted into the leg limit rod limit groove.

3. The swing-type seat mechanical extension device according to claim 2, characterized in that: The leg assembly includes leg link 1, leg link 2, leg link 3, leg link 4, footrest, leg link 5, and leg link 6. One end of leg link 1 and leg link 2 are hinged to 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 limit rivet is provided on leg link 2. The other end of the leg drive rod is hinged to leg link 2 through a leg drive shaft.

4. The swing-type seat mechanical extension device according to claim 2, characterized in that: When lying down, the limiting rivet is located at the foremost position of the leg limiting rod limiting groove.

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

6. The swing-type seat mechanical extension device 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 supports of the two mechanical extension units. The front connecting tube is fixed between the front swing arms of the two mechanical extension units. 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. The intersection points of the cross-sections of the anti-torsion tube, the front connecting tube, and the rear connecting tube with their respective center lines form an isosceles triangle.

7. The swing-type seat mechanical extension device according to claim 1, characterized in that: It also has a base, on which the fixing components are installed.

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