Seat posture adjusting device and seat
By combining the design of the drive assembly and the assist assembly in the seat attitude adjustment device, ensuring that the leg support and the backrest assembly are adjusted in sequence, the problem of incoordinated adjustment movements in the prior art is solved, and the smooth and safe attitude conversion and the effect of reducing production costs is achieved.
Patent Information
- Application Number
- CN202422074842.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-26
- Publication Date
- 2025-06-13
- Estimated Expiration
- 2034-08-26
AI Technical Summary
The existing seat posture adjustment device is prone to inconsistent movements during the adjustment process, which affects the user's user experience.
The design of a combination of drive assembly and assist assembly is used to drive the expansion or retraction of the leg support and backrest assembly through the drive cylinder and pusher, and provides additional support through the elastic members of the assist assembly, ensuring that the leg support and backrest assembly are adjusted in a certain order.
It realizes the coordination, smoothness, safety and reliability of seat posture adjustment, improves the user's experience and reduces production costs.
Smart Images
Figure CN222968197U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of seat manufacturing, and in particular to a seat posture adjustment device. Background Art
[0002] With the improvement of living standards, seats need to be able to adjust their posture to meet users' relaxation needs in multiple scenarios. The seat posture adjustment device includes a seat part, a leg rest and a backrest which are adjustably installed on the seat. By adjusting these three structures, the seat can present three postures: sitting, TV and lying. The sitting posture is a folded state, the lying posture is an extended state, and the TV posture is between the folded state and the extended state. When the posture adjustment device is adjusted from the folded state to the extended state, the leg rest is required to extend first and then the backrest is extended; when the posture adjustment device is adjusted from the extended state to the folded state, the backrest is required to fold first and then the leg rest. The above order requirements need to be met during the posture adjustment process. Disorder will affect the user experience.
[0003] The posture adjustment of seats in related technologies is usually achieved through multiple independent electric push rods or cylinders. Although this method can provide a certain adjustment range, the adjustment process is not smooth enough, and it is easy to cause uncoordinated movements of different parts, affecting the user experience.
[0004] Therefore, providing a posture adjustment device with coordinated and smooth adjustment movements is a technical problem that technical personnel in this field currently need to solve. Utility Model Content
[0005] In order to help reduce the technical problem of uncoordinated adjustment actions of a posture adjustment device, the present application provides a seat posture adjustment device and a seat.
[0006] In a first aspect, the present application provides a seat posture adjustment device, which adopts the following technical solution:
[0007] A seat attitude adjustment device includes a seat component, two leg rest components connected to the front end of the seat component, and two backrest components connected to the rear end of the seat component. The seat component includes a fixed frame, two moving frames arranged side by side, and a slide rail component. The two moving frames are slidably connected to the fixed frame through the slide rail component. It further includes a drive component for driving the two leg rest components and the two backrest components to expand or retract. The drive component includes a drive electric cylinder and a pusher connected to the drive rod of the drive electric cylinder. Both ends of the pusher are connected to the two leg rest components. The drive electric cylinder is rotatably connected to the fixed frame. It also includes an assisting component for assisting the two leg rest components to expand first or the two backrest components to retract first. The assisting component is installed on the moving frame. One end of the assisting component is connected to the leg rest component, and the other end is connected to the fixed frame.
[0008] By adopting the above technical solution, when the attitude adjustment device is converted from a sitting posture to a lying posture, the drive rod of the drive electric cylinder extends to push the pusher. The pusher drives the leg rest component to first perform an extension action with the assistance of the assisting component, and then pushes the moving frame to drive the backrest component to perform an extension action. When the attitude adjustment device is converted from a lying posture to a sitting posture, the drive rod of the drive electric cylinder contracts to push the pusher. The pusher drives the leg rest component with the assistance of the assisting component. The moving frame drives the backrest component to first perform a retraction action, and then pushes to drive the leg rest component to perform a retraction action, which helps the attitude adjustment device to extend and adjust in sequence according to the sitting posture, TV posture, and lying posture, and retract in the order of lying posture, TV posture, and sitting posture. The attitude conversion action of the attitude adjustment device is smooth, safe, and reliable, enhancing the user experience.
[0009] Optionally, the backrest component includes a first back link, a second back link, a third back link, and a backrest fixing plate. The first back link and the second back link are respectively rotatably connected to the moving frame. The third back link is rotatably arranged on the fixed frame. One end of the second back link is rotatably connected to the third back link, and the other end is rotatably connected to the backrest fixing plate. The end of the first back link away from the moving frame is rotatably connected to the backrest fixing plate. A first limiting member is provided on the backrest fixing plate near the end connected to the first back link. When the seat attitude is in the lying posture, the first limiting member abuts against the first back link. A second limiting member is provided on the backrest fixing plate near the end connected to the second back link. When the seat attitude is in the sitting posture or TV posture, the second limiting member abuts against the second back link.
[0010] By adopting the above technical solution, the first back link and the second back link are rotatably mounted on the moving frame. When the driving rod of the driving electric cylinder retracts, the moving frame is assisted by the assisting component to move first, so that the backrest component is first folded. This helps to smoothly fold the backrest component in sequence from the lying position, TV position, and sitting position. Under the limitation of the first limiting member on the first back link, the backrest component is stably in the lying position. Under the limitation of the second limiting member on the second back link, the backrest component is stably in the TV position or sitting position.
[0011] Optionally, the second back link includes a transmission part, a support part fixedly connected to the transmission part. The part where the transmission part and the support part are combined forms a combined part. The combined part is rotatably connected to the moving frame. One end of the transmission part away from the combined part is rotatably connected to the backrest fixing plate. One end of the support part away from the combined part is rotatably connected to the third back link.
[0012] By adopting the above technical solution, the second back link is rotatably connected to the moving frame through the combined part. The transmission part is connected to the first back link through the backrest fixing plate. The support part is connected to the fixed frame through the third back link. When the moving frame moves relative to the fixed frame, it helps the backrest component to extend or fold in a certain order, so that the backrest mounted on the backrest fixing plate is in the lying position or sitting position.
[0013] Optionally, the leg rest assembly includes a first leg link, a second leg link, a third leg link, a fourth leg link, and a leg rest mounting plate. One end of the first leg link and one end of the second leg link are respectively rotatably connected to the moving frame. The other end of the first leg link is rotatably connected to one end of the fourth leg link. The other end of the second leg link is rotatably connected to one end of the third leg link. The middle of the first leg link is rotatably connected to the middle of the third leg link. The other ends of the third leg link and the fourth leg link are respectively rotatably connected to the leg rest mounting plate. Both ends of the pushing member are fixedly connected to the first leg links in the two leg rest assemblies respectively. The middle of the second leg link is connected to the assisting component. A third limiting member is provided on the third leg link. The third limiting member is located between the connection point of the second leg link and the third leg link and the rotation connection point of the middle of the first leg link and the middle of the third leg link. When the leg rest assembly is in the unfolded state, the first leg link abuts against the third limiting member.
[0014] By adopting the above technical solution, both ends of the pusher are fixedly connected to the first leg link in the two leg rest assemblies respectively. The middle part of the second leg link is connected to the boosting assembly. One end of the first leg link and one end of the second leg link are respectively rotatably connected to the moving frame. When the driving rod of the driving electric cylinder extends, the pusher pushes the first leg link. At the same time, with the assistance of the boosting assembly, the second leg link helps the leg rest assembly to perform the stretching action first, realizing the adjustment from the sitting position to the TV position. After the leg rest assembly stretches, the third limiting member limits the first leg link, so that the leg rest assembly stably maintains the TV position or the lying position.
[0015] Optionally, the pusher includes a push rod, and two mounting ear plates arranged at the middle position of the push rod. Mounting holes are provided on the mounting ear plates, and the mounting holes are penetrated by pin shafts. The pin shafts are rotatably connected to the driving rod of the driving electric cylinder.
[0016] By adopting the above technical solution, the pusher is connected to the first leg link through the push rod, and is rotatably connected to the driving rod of the driving electric cylinder through the pin shafts penetrating the mounting holes on the two mounting ear plates. The driving rod pushes the mounting ear plate to rotate the push rod, and the push rod drives the first leg link to rotate, which helps to realize the folding or stretching action of the leg rest assembly.
[0017] Optionally, the boosting assembly includes a first boosting rod, a second boosting rod and an elastic member. The first boosting rod is rotatably arranged on the moving frame. One end of the first boosting rod is connected to one end of the elastic member. The other end of the first boosting rod is rotatably connected to one end of the second boosting rod. The end of the elastic member away from the first boosting rod is connected to the fixed frame. The end of the second boosting rod away from the first boosting rod is rotatably connected to the middle part of the second leg link.
[0018] By adopting the above technical solution, the first boosting rod is rotatably arranged on the moving frame. One end of the first boosting rod is connected to one end of the elastic member, and the other end is rotatably connected to one end of the second boosting rod. The other end of the second boosting rod is rotatably connected to the middle part of the second leg link. Under the action of the first boosting rod and the second boosting rod, it helps the elastic member to be in a stretched state when the leg rest assembly is in the folded state. When the leg rest assembly is converted from the sitting position to the TV position, the elastic member in the stretched state is assisted by the resilience force to increase the stretching force of the leg rest assembly, which helps the leg rest assembly to perform the stretching action first. When the backrest assembly is converted from the lying position to the sitting position, the elastic member in the stretched state is assisted by the resilience force to increase the sliding force of the moving frame relative to the fixed frame, so that the backrest assembly performs the folding action first. With the assistance of the boosting assembly, the attitude adjustment is coordinated smoothly in sequence. Cooperating with the driving electric cylinder, it can replace the multi-power drive to adjust the attitude, with a simple structure and can effectively reduce the production and manufacturing cost.
[0019] Optionally, the elastic member is a tension spring or a rubber band.
[0020] By adopting the above technical solution, the elastic member is a tension spring or a rubber band, with a simple structure, reliable operation, and can effectively reduce the production and manufacturing costs.
[0021] Optionally, the slide rail component includes a first slide rail fixedly connected to the fixed frame, a second slide rail fixedly connected to the moving frame, and the first slide rail and the second slide rail are slidably connected through a rolling component.
[0022] By adopting the above technical solution, the first slide rail is fixedly installed on the fixed frame, the second slide rail is fixedly installed on the moving frame, and the first slide rail and the second slide rail are slidably connected through a rolling component, which helps to improve the reliability of the sliding of the moving frame on the fixed frame.
[0023] Optionally, the first slide rail includes a bottom plate, outer side plates vertically extending upward on both sides of the bottom plate, and the free ends of the outer side plates are bent inward to form upper tracks, and the upper tracks on both sides form an opening for accommodating the second slide rail, and the bottom plate is fixedly connected to the fixed frame; the second slide rail includes a top plate disposed opposite to the bottom plate, inner side plates vertically extending downward on both sides of the top plate, and the free ends of the inner side plates are bent outward to form lower tracks, and the lower tracks are arranged at intervals opposite to the upper tracks; the rolling component includes a first rolling body, a second rolling body and a cage for preventing the first rolling body and the second rolling body from disengaging, the first rolling body is disposed between the bottom plate and the top plate, and the second rolling body is disposed between the upper track and the lower track.
[0024] By adopting the above technical solution, by arranging the first rolling body between the bottom plate and the top plate, and arranging the second rolling body between the upper track and the lower track, and the first rolling body and the second rolling body are installed in the cage, it helps to improve the stability and reliability of the sliding of the first slide rail and the second slide rail.
[0025] In a second aspect, the present application provides a seat, adopting the following technical solution:
[0026] A seat includes a seat attitude adjustment device as described above, and further includes a backrest plate installed on the backrest assembly and a leg rest plate installed on the leg rest assembly.
[0027] By adopting the above technical solution, the attitude adjustment device of the seat adopts a design combining a driving component and an assisting component, realizing the linkage adjustment of the leg rest plate and the backrest plate of the seat in a certain sequence, making the seat attitude adjustment action coordinated, smooth, safe and reliable.
[0028] In summary, the present application includes at least one of the following beneficial technical effects:
[0029] 1. The posture adjustment device of the seat adopts a design that combines a driving component and an assisting component, realizing the linkage adjustment of the leg rest and the backrest of the seat in a certain sequence, making the seat posture adjustment action coordinated, smooth, safe and reliable; enhancing the user experience.
[0030] 2. The first back link and the second back link are rotatably installed on the moving frame. One end of the assisting component is connected to the fixed frame. When the driving rod of the driving electric cylinder retracts, the moving frame is assisted by the assisting component to move first, causing the backrest component to fold first, which helps to smoothly fold in sequence from the lying position, TV position to the sitting position.
[0031] 3. The elastic member of the assisting component, with the assistance of the resilience, helps the leg rest component to extend first, or helps the backrest component to fold first. The posture adjustment of the posture adjustment device is coordinated and smooth. Cooperating with the driving electric cylinder, it can replace the multi-power drive for posture adjustment, with a simple structure and effectively reducing the production and manufacturing cost.
[0032] 4. A first rolling body is arranged between the bottom plate and the top plate, and a second rolling body is arranged between the upper track and the lower track. The first rolling body and the second rolling body are installed in the cage, which helps to improve the sliding stability and reliability of the first slide rail and the second slide rail. BRIEF DESCRIPTION OF THE DRAWINGS
[0033] Figure 1 FIG. is a schematic structural view of a seat posture adjustment device disclosed in the present application in the sitting position.
[0034] Figure 2 FIG. is a schematic structural view of a seat posture adjustment device disclosed in the present application in the TV position.
[0035] Figure 3 FIG. is a schematic structural view of a seat posture adjustment device disclosed in the present application in the lying position.
[0036] Figure 4 is Figure 3 a partial enlarged view of position I in
[0037] Figure 5 is Figure 3 a partial enlarged view of position II in
[0038] Figure 6 is Figure 3 a partial enlarged view of position III in
[0039] Figure 7 is a cross-sectional view taken along Figure 2 A-A in
[0040] Figure 8Schematic structural diagram of a seat in a reclined position disclosed in the present application.
[0041] Description of reference numerals:
[0042] 1. Seat component; 11. Fixed frame; 12. Moving frame; 13. Slide rail component; 131. First slide rail; 1311. Bottom plate; 1312. Outer side plate; 1313. Upper rail; 1314. Opening; 132. Second slide rail; 1321. Top plate; 1322. Inner side plate; 1323. Lower rail; 133. Rolling component; 1331. First rolling body; 1332. Second rolling body; 1333. Cage; 2. Leg rest component; 21. First leg link; 22. Second leg link; 23. Third leg link; 231. Third limiting member; 24. Fourth leg link; 25. Leg rest mounting plate; 3. Backrest component; 31. First back link; 32. Second back link; 321. Transmission part; 322. Support part; 323. Joint part; 33. Third back link; 34. Backrest fixing plate; 341. Mounting part; 342. First limiting member; 343. Second limiting member; 4. Driving component; 41. Driving electric cylinder; 411. Driving rod; 42. Pushing member; 421. Push rod; 4211. Fixing plate; 422. Mounting ear plate; 4221. Mounting hole; 43. Pin shaft; 5. Boosting component; 51. First boosting rod; 52. Second boosting rod; 53. Elastic member; 101. Backrest plate; 102. Leg rest plate. Detailed implementation manners
[0043] The following is a further detailed description of the present application in conjunction with Figures 1 to 8 to further elaborate on the present application.
[0044] The embodiment of the present application discloses a seat attitude adjustment device.
[0045] A seat attitude adjustment device. Refer to Figures 1 to 3, including a seat component 1, two leg rest components 2 and two backrest components 3. The two leg rest components 2 are installed at the front end of the seat component 1, and the two backrest components 3 are installed at the rear end of the seat component 1. The seat component 1 includes a fixed frame 11, two movable frames 12 and a slide rail component 13. The two movable frames 12 are arranged side by side and are slidably connected to the fixed frame 11 through the slide rail component 13. It also includes a driving component 4. The driving component 4 is used to drive the two leg rest components 2 and the two backrest components 3 to expand or retract. The driving component 4 includes a driving electric cylinder 41 and a pushing member 42 connected to the driving rod 411 of the driving electric cylinder 41. Both ends of the pushing member 42 are connected to the two leg rest components 2. The driving electric cylinder 41 is rotatably connected to the fixed frame 11. It further includes an assisting component 5. The assisting component 5 is used to assist the two leg rest components 2 to expand first or the two backrest components 3 to retract first. The assisting component 5 is installed on the movable frame 12. One end of the assisting component 5 is connected to the leg rest component 2, and the other end is connected to the fixed frame 11. When the posture adjusting device is converted from a sitting posture to a lying posture, the driving rod 411 of the driving electric cylinder 41 extends to push the pushing member 42. The pushing member 42 drives the leg rest component 2. With the assistance of the assisting component 5, the leg rest component 2 first performs an extension action, and then pushes the movable frame 12 to drive the backrest component 3 to perform an extension action. When the posture adjusting device is converted from a lying posture to a sitting posture, the driving rod 411 of the driving electric cylinder 41 retracts to push the pushing member 42. The pushing member 42 drives the leg rest component 2. With the assistance of the assisting component 5, the movable frame 12 drives the backrest component 3 to first perform a retraction action, and then pushes to drive the leg rest component 2 to perform a retraction action, which helps the posture adjusting device to extend and adjust successively according to the sitting posture, TV posture and lying posture, or to retract successively in the order of lying posture, TV posture and sitting posture. The posture conversion action of the posture adjusting device is smooth, safe and reliable, enhancing the user experience.
[0046] Refer to Figure 3 and Figure 4, the backrest assembly 3 includes a first back link 31, a second back link 32, a third back link 33 and a backrest fixing plate 34. The first back link 31 and the second back link 32 are respectively rotatably connected to the moving frame 12. The third back link 33 is rotatably arranged on the fixed frame 11. One end of the second back link 32 is rotatably connected to the third back link 33, and the other end of the second back link 32 is rotatably connected to the backrest fixing plate 34. The end of the first back link 31 away from the moving frame 12 is rotatably connected to the backrest fixing plate 34. The middle of the backrest fixing plate 34 is provided with an installation part 341 for installing the seat backrest plate 101. A first limiting member 342 is provided at one end of the backrest fixing plate 34 close to the connection with the first back link 31. When the seat posture is in the lying position, the first limiting member 342 abuts against the first back link 31. A second limiting member 343 is provided at one end of the backrest fixing plate 34 close to the connection with the second back link 32. When the seat posture is in the sitting position or the TV position, the second limiting member 343 abuts against the second back link 32. When adjusting from the lying position to the sitting position, the driving rod 411 of the driving electric cylinder 41 retracts. The moving frame 12 is assisted by the assisting assembly 5, so that the moving frame 12 first moves to make the backrest assembly 3 first fold up, which helps to smoothly fold up in sequence from the lying position, the TV position and the sitting position. The first back link 31 is limited by the first limiting member 342, which helps to keep the backrest assembly 3 stable in the lying position. The second back link 32 is limited by the second limiting member 343, which helps to keep the backrest assembly 3 stable in the sitting position or the TV position. It should be noted that both the first limiting member 342 and the second limiting member 343 are in the form of a shaft pin structure and are fixed to the backrest fixing plate 34 by welding or screw fastening.
[0047] Referring to Figure 4 , the second back link 32 includes a transmission part 321 and a support part 322. The support part 322 is fixedly connected to the transmission part 321. In the embodiment of the present application, the support part 322 and the transmission part 321 are integrally formed. In other embodiments of the present application, the support part 322 and the transmission part 321 are fixed together by welding or bonding. The combined part of the transmission part 321 and the support part 322 forms a combined part 323. The combined part 323 is rotatably connected to the moving frame 12. The end of the transmission part 321 away from the combined part 323 is rotatably connected to the backrest fixing plate 34. The end of the support part 322 away from the combined part 323 is rotatably connected to the third back link 33; the second back link 32 is rotatably connected to the moving frame 12 through the combined part 323. The transmission part 321 is connected to the first back link 31 through the backrest fixing plate 34. The support part 322 is connected to the fixed frame 11 through the third back link 33. When the moving frame 12 moves relative to the fixed frame 11, it helps the backrest assembly 3 to extend or fold up in a certain order, so that the backrest plate 101 installed on the backrest fixing plate 34 is in the lying position or the sitting position. When the backrest assembly 3 is in the sitting position or the TV position, the transmission part 321 abuts against the second limiting member 343, so that the backrest assembly 3 is stable in the sitting position or the TV position.
[0048] Referring to Figure 3 and Figure 5 Figure 5 , the leg rest assembly 2 includes a first leg link 21, a second leg link 22, a third leg link 23, a fourth leg link 24 and a leg rest mounting plate 25. One end of the first leg link 21 and one end of the second leg link 22 are respectively rotatably connected to the moving frame 12. The other end of the first leg link 21 is rotatably connected to one end of the fourth leg link 24. The other end of the second leg link 22 is rotatably connected to one end of the third leg link 23. The middle part of the first leg link 21 is rotatably connected to the middle part of the third leg link 23. The other ends of the third leg link 23 and the fourth leg link 24 are respectively rotatably connected to the leg rest mounting plate 25. Both ends of the pushing member 42 are respectively fixedly connected to the first leg links 21 in the two leg rest assemblies 2. The middle part of the second leg link 22 is connected to the boosting assembly 5. When the driving rod 411 of the driving electric cylinder 41 extends, the pushing member 42 pushes the first leg link 21. At the same time, with the assistance of the boosting assembly 5, the second leg link 22 helps the leg rest assembly 2 to perform an extension action first, realizing the adjustment from the sitting position to the TV position and the lying position. A third limiting member 231 for limiting the first leg link 21 is provided on the third leg link 23. The third limiting member 231 is located between the connection point of the second leg link 22 and the third leg link 23 and the rotation connection point between the middle part of the first leg link 21 and the middle part of the third leg link 23. After the leg rest assembly 2 extends into the TV position or the lying position, the first leg link 21 abuts against the third limiting member 231, which helps the leg rest assembly 2 to be stable in the TV position or the lying position. It should be noted that the third limiting member 231 is also in the form of a shaft pin and is fixed on the third leg link 23 by welding or screw fastening.
[0049] Referring to Figure 5 and Figure 6 Figure 6 , the pushing member 42 includes a push rod 421. Two mounting ear plates 422 are arranged at the middle position of the push rod 421. Mounting holes 4221 are provided on the mounting ear plates 422. The mounting holes 4221 are penetrated by a pin shaft 43. The pin shaft 43 is rotatably connected to the driving rod 411 of the driving electric cylinder 41. Fixing plates 4211 are provided at both ends of the push rod 421 in the embodiments of the present application. The fixing plates 4211 are respectively fixedly connected to the two first leg links 21 by screws. In other embodiments of the present application, both ends of the push rod 421 are directly welded to the two first leg links 21. The pushing member 42 is connected to the first leg link 21 through the push rod 421 and is rotatably connected to the driving rod 411 of the driving electric cylinder 41 through the pin shaft 43 penetrating the mounting holes 4221 on the two mounting ear plates 422, which helps to increase the torque between the driving rod 411 and the pushing member 42, so that the driving rod 411 pushes the mounting ear plate 422 to drive the push rod 421 to rotate, and then the push rod 421 drives the first leg link 21 to rotate, which helps to realize the folding or extension action of the leg rest assembly 2.
[0050] Referring toFigure 3 , the assisting component 5 includes a first assisting rod 51, a second assisting rod 52 and an elastic member 53. The first assisting rod 51 is rotatably arranged on the moving frame 12. One end of the first assisting rod 51 is connected to one end of the elastic member 53. The other end of the first assisting rod 51 is rotatably connected to one end of the second assisting rod 52. The other end of the elastic member 53 is connected to the fixed frame 11. The other end of the second assisting rod 52 is rotatably connected to the middle of the second leg link 22. Under the action of the first assisting rod 51 and the second assisting rod 52, it helps to make the elastic member 53 in a stretched state when the leg support assembly 2 is in the retracted state. When the leg support assembly 2 is converted from the sitting position to the lying position, the elastic member 53 in the stretched state, with the assistance of the resilience, increases the stretching force of the leg support assembly 2, which helps the leg support assembly 2 to perform the stretching action first. When the backrest assembly 3 is converted from the lying position to the sitting position, the elastic member 53 in the stretched state, with the assistance of the resilience, increases the sliding force of the moving frame 12 relative to the fixed frame 11, which helps the backrest assembly 3 to perform the retracting action first. With the assistance of the assisting component 5, the posture adjustment is coordinated and smooth. The assisting component 5 cooperating with the driving electric cylinder 41 can replace the multi-power drive to adjust the posture. The elastic member 53 is a tension spring or a rubber band, with low manufacturing cost, simple structure and reliable action, which can effectively reduce the production and manufacturing cost.
[0051] Refer to Figure 2 and Figure 7, the slide rail component 13 includes a first slide rail 131 and a second slide rail 132. The first slide rail 131 is fixedly connected to the fixed frame 11 by fastening screws, and the second slide rail 132 is fixedly connected to the movable frame 12 by fastening screws. The first slide rail 131 and the second slide rail 132 are slidably connected by a rolling component 133, which helps to improve the reliability of the sliding of the movable frame 12 on the fixed frame 11. The first slide rail 131 includes a bottom plate 1311, outer side plates 1312 vertically extending upward on both sides of the bottom plate 1311. The free ends of the outer side plates 1312 are bent inward to form upper tracks 1313. The upper tracks 1313 on both sides form an opening 1314 for accommodating the second slide rail 132. The bottom plate 1311 is fixedly connected to the fixed frame 11. The second slide rail 132 includes a top plate 1321 disposed opposite to the bottom plate 1311, inner side plates 1322 vertically extending downward on both sides of the top plate 1321. The free ends of the inner side plates 1322 are bent outward to form lower tracks 1323. The lower tracks 1323 are arranged at intervals opposite to the upper tracks 1313. The rolling component 133 includes a first rolling body 1331, a second rolling body 1332, and a cage 1333 for preventing the first rolling body 1331 and the second rolling body 1332 from disengaging. The first rolling body 1331 is disposed between the bottom plate 1311 and the top plate 1321, and the second rolling body 1332 is disposed between the upper track 1313 and the lower track 1323. The first rolling body 1331 and the second rolling body 1332 are installed in the cage 1333, which helps to improve the stability and reliability of the sliding of the first slide rail 131 and the second slide rail 132.
[0052] The embodiment of the present application also discloses a seat.
[0053] A seat, referring to Figure 8 , includes a seat attitude adjustment device, and further includes a backrest plate 101 installed on the backrest assembly 3 and a leg rest plate 102 installed on the leg rest assembly 2. The attitude adjustment device of the seat adopts a design combining a driving component 4 and an assisting component 5, realizing the linkage adjustment of the leg rest plate 102 and the backrest plate 101 of the seat in a certain sequence, making the seat attitude adjustment action coordinated, smooth, safe and reliable.
[0054] The working principle of a seat posture adjustment device is as follows: When the posture adjustment device is in the sitting position, the leg rest assembly 2 and the backrest assembly 3 are both in the retracted state. The elastic member 53 of the assisting component 5 is in a stretched state under the action of the first assisting rod 51 and the second assisting rod 52. When adjusting from the sitting position to the TV position, the driving electric cylinder 41 is energized to act, and the driving rod 411 extends. While the driving rod 411 drives the push rod 421 to move, it also rotates. The push rod 421 drives the first leg connecting rod 21 to move. At the same time, the first assisting rod 51 and the second assisting rod 52 move under the pulling force of the elastic member 53, and the elastic member 53 immediately retracts. The second assisting rod 52 drives the second leg connecting rod 22 to move. The first leg connecting rod 21 drives the fourth leg connecting rod 24, and the second leg connecting rod 22 drives the third leg connecting rod 23. The third leg connecting rod 23 and the fourth leg connecting rod 24 drive the leg rest mounting plate 25 to perform an extension action. When the leg rest mounting plate 25 is fully extended, the third limiting member 231 abuts against the first leg connecting rod 21, the driving electric cylinder 41 is powered off, and the driving rod 411 stops extending. The posture adjustment device is in the TV position. When adjusting from the TV position to the lying position, the driving electric cylinder 41 is energized to drive the driving rod 411 to continue extending. The driving rod 411 drives the push rod 421 to move forward. The push rod 421 drives the first leg connecting rod 21 and the moving frame 12 to also move forward. The moving frame 12 drives the first backrest connecting rod 31 to also move forward. The backrest fixing plate 34 is stretched backward into the lying position under the pulling of the first backrest connecting rod 31, the second backrest connecting rod 32, and the third backrest connecting rod 33. The first backrest connecting rod 31 abuts against the first limiting member 342. At the same time, the elastic member 53 is in a stretched state under the pulling of the fixing frame 11 and the first assisting rod 51. The driving electric cylinder 41 is powered off and the driving rod 411 stops extending. The posture adjustment device is adjusted to the lying position. When the posture adjustment device is adjusted from the lying position to the sitting position, the driving electric cylinder 41 is energized, and the driving rod 411 retracts. The driving rod 411 drives the push rod 421 to apply a backward pulling force to the first leg connecting rod 21 and the moving frame 12. Under the combined action of the resilience of the elastic member 53, the moving frame 12 slides backward. The backrest fixing plate 34 is retracted into the TV position under the pulling of the first backrest connecting rod 31, the second backrest connecting rod 32, and the third backrest connecting rod 33. The second backrest connecting rod 32 abuts against the second limiting member 343, maintaining the backrest assembly 3 in the retracted TV position. The elastic member 53 immediately retracts. The driving rod 411 of the driving electric cylinder 41 continues to retract. The driving rod 411 drives the push rod 421 to rotate and drive the first leg connecting rod 21 to move backward. The first leg connecting rod 21 drives the second leg connecting rod 22 and the third leg connecting rod 23. The third leg connecting rod 23, the fourth leg connecting rod 24, and the leg rest mounting plate 25 perform a retraction movement. Finally, the leg rest mounting plate 25 is in the retracted state, and the posture adjustment device is adjusted to the sitting position. The driving electric cylinder 41 is powered off, and the driving rod 411 stops retracting. While the leg rest assembly 2 is performing the retraction action, the second leg connecting rod 22 drives the second assisting rod 52 to act. The second assisting rod 52 drives the first assisting rod 51 to rotate, and the first assisting rod 51 thus tightens the elastic member 53, making the elastic member 53 in a stretched state.
[0055] The above are all preferred embodiments of this application, and do not limit the protection scope of this application in sequence. Therefore, all equivalent changes made according to the structure, shape, and principle of this application shall be covered within the protection scope of this application.
Claims
1. A seat posture adjustment device, comprising a seat assembly (1), two leg support assemblies (2) connected to the front end of the seat assembly (1), and two backrest assemblies (3) connected to the rear end of the seat assembly (1), the seat assembly (1) comprising a fixed frame (11), two movable frames (12) arranged side by side and a slide rail component (13), the two movable frames (12) being slidably connected to the fixed frame (11) via the slide rail component (13), characterized in that: The invention also comprises a driving assembly (4) for driving the two leg support assemblies (2) and the two backrest assemblies (3) to expand or fold, the driving assembly (4) comprising a driving electric cylinder (41) and a pushing member (42) connected to a driving rod (411) of the driving electric cylinder (41), the two ends of the pushing member (42) being connected to the two leg support assemblies (2), the driving electric cylinder (41) being rotatably connected to the fixed frame (11), and a power-assisting assembly (5) for assisting the two leg support assemblies (2) to expand first or the two backrest assemblies (3) to fold first, the power-assisting assembly (5) being mounted on the mobile frame (12), one end of the power-assisting assembly (5) being connected to the leg support assemblies (2), and the other end being connected to the fixed frame (11).
2. A seat posture adjustment device according to claim 1, characterized in that: The backrest assembly (3) comprises a first back connecting rod (31), a second back connecting rod (32), a third back connecting rod (33) and a backrest fixing plate (34); the first back connecting rod (31) and the second back connecting rod (32) are respectively rotatably connected to the movable frame (12); the third back connecting rod (33) is rotatably arranged on the fixing frame (11); one end of the second back connecting rod (32) is rotatably connected to the third back connecting rod (33) and the other end is rotatably connected to the backrest fixing plate (34); the first back connecting rod (31) is away from the movable frame (12) One end of the backrest fixing plate (34) is rotatably connected to the backrest fixing plate (34), and a first limiting member (342) is provided on the backrest fixing plate (34) close to the end connected to the first back connecting rod (31). When the seat is in a lying position, the first limiting member (342) abuts against the first back connecting rod (31). A second limiting member (343) is provided on the backrest fixing plate (34) close to the end connected to the second back connecting rod (32). When the seat is in a sitting position or a TV position, the second limiting member (343) abuts against the second back connecting rod (32).
3. A seat posture adjustment device according to claim 2, characterized in that: The second back-link rod (32) comprises a transmission part (321) and a support part (322) fixedly connected to the transmission part (321); the portion where the transmission part (321) and the support part (322) are combined forms a combination part (323); the combination part (323) is rotationally connected to the movable frame (12); one end of the transmission part (321) away from the combination part (323) is rotationally connected to the backrest fixing plate (34); and one end of the support part (322) away from the combination part (323) is rotationally connected to the third back-link rod (33).
4. A seat posture adjustment device according to claim 3, characterized in that: The leg support assembly (2) comprises a first leg link (21), a second leg link (22), a third leg link (23), a fourth leg link (24) and a leg support mounting plate (25); one end of the first leg link (21) and one end of the second leg link (22) are respectively rotatably connected to the mobile frame (12); the other end of the first leg link (21) is rotatably connected to one end of the fourth leg link (24); the other end of the second leg link (22) is rotatably connected to one end of the third leg link (23); the middle part of the first leg link (21) is rotatably connected to the middle part of the third leg link (23); the other end of the third leg link (23) and the other end of the fourth leg link (24) are rotatably connected to each other. The two ends of the pushing member (42) are respectively rotatably connected to the leg support mounting plate (25); the two ends of the pushing member (42) are respectively fixedly connected to the first leg connecting rods (21) in the two leg support assemblies (2); the middle part of the second leg connecting rod (22) is connected to the power-assisting assembly (5); a third limiting member (231) is provided on the third leg connecting rod (23); the third limiting member (231) is located between the connection point between the second leg connecting rod (22) and the third leg connecting rod (23) and the rotation connection point between the middle part of the first leg connecting rod (21) and the middle part of the third leg connecting rod (23); when the leg support assembly (2) is in the unfolded state, the first leg connecting rod (21) abuts against the third limiting member (231).
5. A seat posture adjustment device according to claim 4, characterized in that: The pushing member (42) comprises a push rod (421), two mounting ear plates (422) arranged at the middle position of the push rod (421), the mounting ear plates (422) are provided with mounting holes (4221), a pin shaft (43) is passed through the mounting hole (4221), and the pin shaft (43) is rotatably connected to the driving rod (411) of the driving electric cylinder (41).
6. A seat posture adjustment device according to claim 5, characterized in that: The power assist assembly (5) comprises a first power assist rod (51), a second power assist rod (52) and an elastic member (53); the first power assist rod (51) is rotatably arranged on the movable frame (12); one end of the first power assist rod (51) is connected to one end of the elastic member (53); the other end of the first power assist rod (51) is rotatably connected to one end of the second power assist rod (52); one end of the elastic member (53) away from the first power assist rod (51) is connected to the fixed frame (11); and one end of the second power assist rod (52) away from the first power assist rod (51) is rotatably connected to the middle part of the second leg connecting rod (22).
7. A seat posture adjustment device according to claim 6, characterized in that: The elastic member (53) is a tension spring or a rubber belt.
8. The seat posture adjustment device according to claim 1, characterized in that: The slide rail component (13) comprises a first slide rail (131) fixedly connected to the fixed frame (11) and a second slide rail (132) fixedly connected to the movable frame (12); the first slide rail (131) and the second slide rail (132) are slidably connected via a rolling assembly (133).
9. The seat posture adjustment device according to claim 8, characterized in that: The first slide rail (131) comprises a bottom plate (1311), outer plates (1312) extending vertically upward on both sides of the bottom plate (1311), free ends of the outer plates (1312) are bent inwardly to form upper rails (1313), the upper rails (1313) on both sides form openings (1314) for accommodating the second slide rail (132), the bottom plate (1311) is fixedly connected to the fixing frame (11); the second slide rail (132) comprises a top plate (1321) arranged opposite to the bottom plate (1311), inner plates (1322) extending vertically downward on both sides of the top plate (1321), the inner plates (1322) extending vertically downward on both sides of the top plate (1321), the inner plates (1323) extending vertically downward on both sides of the top plate (1323) The free end of the plate (1322) is bent outward to form a lower track (1323), and the lower track (1323) is arranged relatively spaced from the upper track (1313); the rolling assembly (133) comprises a first rolling body (1331), a second rolling body (1332) and a retaining frame (1333) for preventing the first rolling body (1331) and the second rolling body (1332) from disengaging, the first rolling body (1331) is arranged between the bottom plate (1311) and the top plate (1321), and the second rolling body (1332) is arranged between the upper track (1313) and the lower track (1323).
10. A seat, characterized in that: It comprises a seat posture adjustment device as claimed in any one of claims 1 to 9, comprising a backrest plate (101) installed on the backrest assembly (3) and a leg support plate (102) installed on the leg support assembly (2).