A dual-rail folding mechanism
By designing a dual-rail folding mechanism and combining the first and second adjustment components, the stairlift chair achieves rapid and effortless multi-angle folding, solving the problems of long drive stroke, high energy consumption, and large space occupation in existing technologies, and improving safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- FOSHAN NANHAI SUKANG HARDWARE RUBBER PROD CO LTD
- Filing Date
- 2025-07-22
- Publication Date
- 2026-07-21
AI Technical Summary
Although existing stair lifts have adopted a foldable structure, the drive mechanism has a long drive stroke, which takes a long time and is labor-intensive and energy-consuming. The folding angle is limited, and they still take up a lot of space.
The device employs a dual-rail folding mechanism, including a fixed rail unit and a flipping rail unit. Through the combined structure of the first and second adjustment components, the drive stroke is shortened, and a larger angle of rotational folding is achieved through multiple rotations. Combined with a rail closure detection and folding anti-collision protection unit, safety is ensured.
It effectively shortens folding time, saves effort and electricity, increases the folding range, reduces space occupation, and improves safety.
Smart Images
Figure CN224530381U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of stair lifting equipment technology, and in particular to a double guide rail folding mechanism. Background Technology
[0002] A stairlift is a type of elevator that runs along the side of a staircase. Its main function is to assist people with mobility impairments in ascending and descending stairs. A stairlift typically consists of three parts: a track, a drive mechanism, and a seat. The drive mechanism and seat are installed together, so from the outside, a stairlift looks like a chair running on a track. In practical applications, there are situations where doorways or passageways are too close to the stairs. This often results in the stairlift track being fixed along the stair steps and extending to the ground to allow the chair to slide smoothly to the ground. However, the track occupies some space in the doorway or passageway, affecting door opening and closing and passageway movement, creating safety hazards. To solve these problems, some new types of stairlifts have emerged on the market. By adjusting the part of the track closest to the doorway or passageway to a foldable structure, the problem of occupying doorway and passageway space can be mitigated to some extent.
[0003] The applicant has discovered at least the following technical problems in the prior art: Although the existing stair lift chair adopts a foldable structure, the drive stroke of the drive mechanism used to drive the folding is long, which results in a long folding time and is more labor-intensive and power-consuming. Moreover, its folding angle and folding range are relatively limited, and it still occupies space after being folded in place. Utility Model Content
[0004] The purpose of this utility model is to provide a dual-rail folding mechanism to solve the technical problems existing in the prior art. The preferred technical solutions among the various technical solutions provided by this utility model and their numerous technical effects are detailed below.
[0005] To achieve the above objectives, the present invention provides the following technical solution: A dual-rail folding mechanism includes a fixed rail unit and a flipping rail unit for sliding connection of a lifting chair. The fixed rail unit is connected to a staircase. The mechanism also includes a drive unit comprising a first fixed-side connecting component, a second fixed-side connecting component, a flipping-side connecting component, a first adjusting component, and a second adjusting component. The first fixed-side connecting component is connected to the high end of the fixed rail unit, and the second fixed-side connecting component is connected to the low end of the fixed rail unit. The high end of the first adjusting component is connected to the first fixed-side connecting component, and its low end is rotatably connected to the high end of the second adjusting component. The second adjusting component is rotatably connected to the second fixed-side connecting component, and its low end is rotatably connected to the flipping-side connecting component. The flipping-side connecting component is connected to the high end of the flipping rail unit and is rotatably connected to the second fixed-side connecting component.
[0006] Preferably, the first fixed-side connecting assembly includes an adjusting rod and an adjusting sleeve. The adjusting rod is connected to the fixed track unit, and the adjusting sleeve is connected to the adjusting rod. The high end of the first adjusting assembly is connected to the adjusting sleeve.
[0007] Preferably, the second fixed-side connecting assembly includes a first connecting piece, a connecting rod, and a second connecting piece. The first connecting piece is connected to the lower end of the fixed track unit. The two ends of the connecting rod are respectively connected to the first connecting piece and the second connecting piece. The second adjusting assembly is located between the first connecting piece and the second connecting piece, and the second adjusting assembly is rotatably connected to the first connecting piece and the second connecting piece.
[0008] Preferably, the flip-side connecting assembly includes a third connecting piece, which is rotatably connected to the second fixed-side connecting assembly and rotatably connected to the second adjusting assembly.
[0009] Preferably, the first adjustment component includes an electric push rod, the cylinder of which is connected to the first fixed-side connection component, and the extended end of the push rod of the electric push rod is rotatably connected to the high end of the second fixed-side connection component.
[0010] Preferably, the first adjusting assembly further includes a first fixing sleeve, a first linear bearing, a first guide rod, and a guide rod fixing plate. The first fixing sleeve is connected to the cylinder of the electric push rod and the first linear bearing, respectively. The first guide rod is movably connected to the first linear bearing and is arranged parallel to the push rod. The guide rod fixing plate is connected to the first guide rod and the push rod, respectively.
[0011] Preferably, the second adjusting assembly includes a second fixed sleeve, a second linear bearing, a third linear bearing, a support rod, a second guide rod, a third guide rod, and a guide rod fixing block. One end of the support rod is provided with a tail hinge structure and is rotatably connected to the first adjusting assembly through the tail hinge structure. The other end of the support rod is connected to the second fixed sleeve. The second linear bearing and the third linear bearing are respectively connected to the second fixed sleeve. The second guide rod is movably connected to the second linear bearing. The third guide rod is movably connected to the third linear bearing. One end of both the second guide rod and the third guide rod is connected to the guide rod fixing block. The guide rod fixing block is rotatably connected to the flip-side connecting assembly. The second fixed sleeve is rotatably connected to the second fixed-side connecting assembly.
[0012] Preferably, the fixed track unit includes a first upper guide rail, a first lower guide rail, a first connecting structure, and a supporting connecting structure. The first upper guide rail and the first lower guide rail are arranged parallel to each other and are connected by the first connecting structure. A first rack is provided on the first lower guide rail. The supporting connecting structure is connected to the first upper guide rail, the first lower guide rail, and the staircase respectively. The flipping track unit includes a second upper guide rail, a second lower guide rail, and a second connecting structure. The second upper guide rail and the second lower guide rail are arranged in parallel and connected by the second connecting structure. A second rack is provided on the second lower guide rail. When the flipping track unit is closed relative to the fixed track unit, the first upper guide rail and the second upper guide rail are connected, the first lower guide rail and the second lower guide rail are connected, and the first rack and the second rack are connected.
[0013] Preferably, the system further includes a track closure detection unit, which comprises a long roller micro switch, a switch fixing plate, and a detection contact block. The switch fixing plate is connected to the lower part of the first rack near the end of the second rack. The long roller micro switch is connected to the switch fixing plate. The detection contact block is connected to the lower part of the second rack near the end of the first rack. When the flipping track unit is closed relative to the fixed track unit, the detection contact block can form a pressing contact with the long roller micro switch.
[0014] Preferably, it further includes a folding anti-collision protection unit, which is connected to the end of the first rack away from the second rack. The folding anti-collision protection unit is provided with a self-locking switch inside, and the button contact of the self-locking switch is located on the upper surface of the folding anti-collision protection unit. When the lifting chair moves relative to the folding anti-collision protection unit, it can trigger the button contact.
[0015] The beneficial effects of this utility model are as follows: Based on the original single drive mechanism's drive stroke, by adjusting it to a combined structure of a first adjustment component and a second adjustment component, the first adjustment component has its own independent stroke, and the second adjustment component also has its own independent stroke. Based on the relative rotation between the two, the first adjustment component and the second adjustment component can work simultaneously, effectively shortening the folding time, adjusting the overall stroke, saving more effort and electricity. At the same time, with the cooperation of the above components, the drive unit can achieve multiple rotations, ultimately enabling the flip-side connecting component and the flip track unit to rotate and fold at a larger angle relative to the fixed track unit, resulting in a wider folding range, which also further reduces the space occupied after folding. Attached Figure Description
[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0017] Figure 1 This is a structural diagram of the fixed track unit and the flip track unit of this utility model in their closed state; Figure 2 This is a structural diagram of the fixed track unit and the flip track unit of this utility model in their folded state; Figure 3 This is a detailed structural diagram showing the 0° angle between the fixed track unit and the flipping track unit of this utility model. Figure 4 This is a detailed structural diagram showing that the fixed track unit and the flipping track unit of this utility model are at a 90° angle. Figure 5 This is a detailed structural diagram showing that the fixed track unit and the flipping track unit of this utility model are 180° apart; Figure 6 for Figure 3 Enlarged structural diagram at point A in the middle; In the figure: 1. Fixed track unit; 11. First upper guide rail; 12. First lower guide rail; 121. First rack; 13. First connecting structure; 14. Supporting connecting structure; 2. Flip track unit; 21. Second upper guide rail; 22. Second lower guide rail; 221. Second rack; 23. Second connecting structure; 3. Drive unit; 31. First fixed-side connecting assembly; 311. Adjusting rod; 312. Adjusting sleeve; 32. Second fixed-side connecting assembly; 321. First connecting piece; 322. Connecting rod; 323. Second connecting piece; 33. Flip-side connecting assembly; 331. Third connecting piece; 34. First adjusting assembly; 341. Electric push rod; 342. First fixed sleeve; 343. First linear bearing; 344. First guide rod; 345. Guide rod fixing piece; 35. Second adjusting assembly; 351. Second fixed sleeve; 352. Second linear bearing; 353. Third linear bearing; 354. Support rod; 355. Second guide rod; 356. Third guide rod; 357. Guide rod fixing block; 4. Track closure detection unit; 41. Long roller micro switch; 42. Switch fixing plate; 43. Detection contact block; 5. Foldable anti-collision protection unit; 6. Adjustable chair; 7. Stairs. Detailed Implementation
[0018] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. In the description of this utility model, it should be understood that the terms "center," "side," "length," "width," "height," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and "side," etc., indicate the orientation or positional relationship based on the appendix. Figure 1 The orientations or positional relationships shown are for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0019] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0020] Reference Figures 1 to 6This utility model provides a double guide rail folding mechanism, including a fixed rail unit 1 and a flip rail unit 2 for sliding connection of the lifting chair 6, and the fixed rail unit 1 is connected to the staircase 7; It also includes a drive unit 3, which includes a first fixed side connection component 31, a second fixed side connection component 32, a flip side connection component 33, a first adjustment component 34, and a second adjustment component 35; The fixed track unit 1 and the flip track unit 2 are inclined from top to bottom. The first fixed side connecting component 31 is connected to the high end of the fixed track unit 1, and the second fixed side connecting component 32 is connected to the low end of the fixed track unit 1. The high end of the first adjustment component 34 is connected to the first fixed side connection component 31 and its low end is rotatably connected to the high end of the second adjustment component 35. The second adjustment component 35 is rotatably connected to the second fixed side connection component 32 and its low end is rotatably connected to the flip side connection component 33. Under the drive of the first adjustment component 34, the second adjustment component 35 can rotate relative to the second fixed side connection component 32 and can drive the flip side connection component 33. The flip-side connecting component 33 is connected to the high end of the flip track unit 2 and is rotatably connected to the second fixed side connecting component 32. Under the drive of the second adjusting component 35, the flip-side connecting component 33 can rotate relative to the second fixed side connecting component 32, and at the same time can drive the flip track unit 2 to move synchronously.
[0021] Therefore, based on the original single drive mechanism's drive stroke, it is adjusted to a combined structure of the first adjustment component 34 and the second adjustment component 35. The first adjustment component 34 has its own independent stroke, and the second adjustment component 35 also has its own independent stroke. Based on the relative rotation between the two, the first adjustment component 34 and the second adjustment component 35 can work simultaneously, effectively shortening the folding time, adjusting the overall stroke, saving more effort and energy. At the same time, with the cooperation of the above components, the drive unit 3 can achieve multiple rotations, ultimately enabling the flip-side connecting component 33 and the flip track unit 2 to rotate and fold at a larger angle relative to the fixed track unit 1, resulting in a wider folding range, which can further reduce the space occupied after folding.
[0022] As an optional implementation, the first fixed side connection assembly 31 includes an adjusting rod 311 and an adjusting sleeve 312. The adjusting rod 311 is connected to the fixed track unit 1. Here, it is preferred to connect to the first upper guide rail 11 and the first lower guide rail 12 simultaneously in a detachable connection manner. The adjusting sleeve 312 is connected to the adjusting rod 311. Preferably, the connection is made in a detachable manner, and the relative position of the adjusting sleeve 312 and the adjusting rod 311 can be adjusted. The high end of the first adjustment component 34 is connected to the adjustment sleeve 312. Preferably, this connection is detachable, and the two remain relatively fixed, so that the high end of the first adjustment component 34 will not rotate relative to each other. In practical applications, the first fixed-side connecting component 31 remains relatively stationary and does not rotate relative to the others.
[0023] As an optional implementation, the second fixed-side connection assembly 32 includes a first connecting piece 321, a connecting rod 322, and a second connecting piece 323; The first connecting piece 321 is connected to the lower end of the fixed track unit 1. Preferably, this connection is detachable. The two ends of the connecting rod 322 are connected to the first connecting piece 321 and the second connecting piece 323 respectively. Preferably, this connection is detachable. The second adjustment component 35 is located between the first connecting piece 321 and the second connecting piece 323, and the second adjustment component 35 is rotatably connected to the first connecting piece 321 and the second connecting piece 323 respectively; With this configuration, the second adjustment component 35 can rotate relative to the second fixed side connecting component 32, and the second connecting piece 323 enhances the lateral force balance of the second fixed sleeve 351 of the second adjustment component 35, forming lateral support for the second fixed sleeve 351. When the second adjustment component 35 rotates relative to the second fixed side, the force on both sides is more even, reducing swaying. In practical applications, the second fixed-side connecting component 32 remains relatively stationary and does not rotate relative to the others.
[0024] As an optional implementation, the flip-side connecting assembly 33 includes a third connecting piece 331. The third connecting piece 331 is detachably connected to the second upper guide rail 21 of the flip track unit 2 and can remain relatively fixed, so that the third connecting piece 331 can move synchronously with the flip track unit 2. The third connecting piece 331 is rotatably connected to the second fixed-side connecting assembly 32. When the third connecting piece 331 rotates, it can drive the flip track unit 2 to rotate synchronously. The third connecting piece 331 is rotatably connected to the second adjusting assembly 35. Under the driving action of the second adjusting assembly 35, the third connecting piece 331 can rotate relative to the second fixed-side connecting assembly 32.
[0025] As an optional implementation, the first adjustment component 34 includes an electric push rod 341. The cylinder of the electric push rod 341 is connected to the adjustment sleeve 312 of the first fixed side connection component 31. This connection is detachable and can be kept relatively fixed. The extended end of the push rod of the electric push rod 341 is rotatably connected to the high end of the second fixed side connection component 32. During the extension and retraction process, the electric push rod 341 can drive the high end of the second fixed side connection component 32 to rotate relative to each other.
[0026] In addition, the electric push rod 341 is preferably equipped with a limit switch inside, so that when the push rod of the electric push rod 341 reaches the maximum stroke, the electric push rod 341 can be de-energized and stop running. Furthermore, the electric push rod 341 is preferably connected in series with a self-resetting fuse. When the flipping track unit 2 encounters an obstacle during the unfolding process, and the load current of the electric push rod 341 reaches the working current of the self-resetting fuse, the self-resetting fuse is de-energized, and the electric push rod 341 stops running. After the obstacle is cleared, the user can press the reset button of the self-resetting fuse, and the electric push rod 341 can be re-energized and restarted.
[0027] Furthermore, to prevent the push rod of the electric push rod 341 from bending and deforming during the force process, as an optional implementation, the first adjustment assembly 34 also includes a first fixing sleeve 342, a first linear bearing 343, a first guide rod 344, and a guide rod fixing piece 345. The first fixed sleeve 342 is connected to the cylinder body of the electric push rod 341 and the first linear bearing 343 respectively. The first guide rod 344 is movably connected to the first linear bearing 343 and is arranged parallel to the push rod. The guide rod fixing piece 345 is connected to the first guide rod 344 and the push rod respectively. During the extension or retraction of the electric push rod 341, the guide rod fixing plate 345 can extend or retract synchronously with the push rod of the electric push rod 341. The guide rod fixing plate 345 can drive the first guide rod 344 to move synchronously with the cooperation of the first linear bearing 343. Thus, the first guide rod 344 and the first linear bearing 343 guide the push rod of the electric push rod 341, reducing its bending deformation caused by force.
[0028] As an optional implementation, the second adjustment assembly 35 includes a second fixing sleeve 351, a second linear bearing 352, a third linear bearing 353, a support rod 354, a second guide rod 355, a third guide rod 356, and a guide rod fixing block 357. One end of the support rod 354 is provided with a tail hinge structure and is rotatably connected to the first adjustment component 34 through the tail hinge structure; the other end of the support rod 354 is connected to the second fixed sleeve 351. The second linear bearing 352 and the third linear bearing 353 are respectively connected to the second fixed sleeve 351. The second guide rod 355 is movably connected to the second linear bearing 352. The third guide rod 356 is movably connected to the third linear bearing 353. One end of each of the second guide rod 355 and the third guide rod 356 is connected to the guide rod fixing block 357. The guide rod fixing block 357 is rotatably connected to the flip-side connecting assembly 33. The second fixed sleeve 351 is rotatably connected to the second fixed-side connecting assembly 32.
[0029] The second linear bearing 352, the third linear bearing 353, the second guide rod 355, and the third guide rod 356 can cooperate with each other to convert the rotation and linear movement of the second guide rod 355 relative to the second linear bearing 352 into linear movement only, and to convert the rotation and linear movement of the third guide rod 356 relative to the third linear bearing 353 into linear movement only.
[0030] The application principle of the double guide rail folding mechanism is as follows: During the extension or retraction of the electric push rod 341 of the first adjustment component 34, the tail hinge structure of the support rod 354 can be extended or retracted. At the same time, the support rod 354 is restricted by the rotational connection between the second fixed sleeve 351 and the second fixed side connection component 32. The support rod 354 can rotate relative to the connection point between the second fixed sleeve 351 and the second fixed side connection component 32, which is equivalent to driving the second adjustment component 35 to rotate relative to each other. During the rotation, the second guide rod 355 and the third guide rod 356 can move linearly relative to the second linear bearing 352 and the third linear bearing 353, thereby driving the guide rod fixing block 357 to move linearly relative to the second fixed sleeve 351, thereby driving the flip side connection component 33 and the flip track unit 2 to rotate relative to the fixed track unit 1 and the second fixed side connection component 32, thus realizing the flipping. In this embodiment, through the careful design of the above structure, the flip-side connecting component 33 and the flip track unit 2 can rotate and fold relative to the fixed track unit 1 from 0° to 180°, with a larger folding angle and a wider folding range, further reducing the space occupied after folding. It is also worth noting that the second adjustment component 35 only needs to be rotated 90° to achieve a 180° rotation of the flip side connection component 33 and the flip track unit 2. The first adjustment component 34 and the second adjustment component 35 work together to effectively reduce the overall stroke of the push rod, making it more labor-saving and energy-saving.
[0031] As an optional implementation, the fixed track unit 1 includes a first upper guide rail 11, a first lower guide rail 12, a first connecting structure 13, and a supporting connecting structure 14. The first upper guide rail 11 and the first lower guide rail 12 are arranged in parallel to form a double guide rail structure, and the two are connected by the first connecting structure 13. The structure of the first connecting structure 13 is not specifically limited here. In this embodiment, the accompanying drawings preferably show the effect of the first connecting structure 13 being a U-shaped connecting rod. A first rack 121 is provided on the first lower guide rail 12. The first rack 121 is used to move relative to the power mechanism of the lifting chair 6. The support connection structure 14 is connected to the first upper guide rail 11 and the first lower guide rail 12 respectively, and the bottom of the support connection structure 14 is connected to the staircase 7. Therefore, the fixed track unit 1 is actually connected to the staircase 7 through the support connection structure 14.
[0032] As an optional implementation, the flipping track unit 2 includes a second upper guide rail 21, a second lower guide rail 22, and a second connecting structure 23. The second upper guide rail 21 and the second lower guide rail 22 are arranged in parallel to form a double guide rail structure, and the two are connected by the second connecting structure 23. The structure of the second connecting structure 23 is not specifically limited here. In this embodiment, the accompanying drawings preferably show the effect of the second connecting structure 23 being a U-shaped connecting rod. A second rack 221 is provided on the second lower guide rail 22. The second rack 221 is used to move relative to the power mechanism of the lifting chair 6.
[0033] When the flipping track unit 2 is closed relative to the fixed track unit 1, the first upper guide rail 11 and the second upper guide rail 21 are connected, and their axes are also on the same straight line, forming the same guide rail in appearance. The first lower guide rail 12 and the second lower guide rail 22 are connected, and their axes are also on the same straight line, forming the same guide rail in appearance. The first rack 121 and the second rack 221 are connected, forming a continuous rack in appearance. The lifting chair 6 can be guided by the first upper guide rail 11, the first lower guide rail 12, the second upper guide rail 21, and the second lower guide rail 22, and can move relative to the power mechanism of the lifting chair 6 through the cooperation of the first rack 121 and the second rack 221.
[0034] As an optional implementation, in order to prevent safety hazards when the lifting chair 6 moves up or down due to the fixed track unit 1 and the flip track unit 2 not being completely closed, the double guide rail folding mechanism also includes a track closure detection unit 4, which is set at the docking point of the fixed track unit 1 and the flip track unit 2. Specifically, the track closure detection unit 4 includes a long roller micro switch 41, a switch fixing plate 42, and a detection contact block 43. The switch fixing plate 42 is connected to the lower end of the first rack 121 near the second rack 221. The long roller micro switch 41 is connected to the switch fixing plate 42. The detection contact block 43 is connected to the lower end of the second rack 221 near the first rack 121 and is located above the long roller micro switch 41. When the flip track unit 2 is closed relative to the fixed track unit 1, the detection contact block 43 can form a pressing contact with the long roller micro switch 41. The long roller micro switch 41 is connected by a circuit and can send a signal to the lifting chair 6 that the flip track unit 2 is fully closed. The lifting chair 6 can then move up or down. Conversely, when the detection contact block 43 does not press against the long roller micro switch 41, the long roller micro switch 41 sends a signal to the lifting chair 6 that the flip track unit 2 is not fully closed. The lifting chair 6 will not start and will not move up or down.
[0035] In fact, during use, the lifting chair 6 may fold due to user error before it leaves the effective folding travel range of the flip track unit 2, which may easily cause equipment damage and danger. Therefore, as an optional implementation, the dual-rail folding mechanism also includes a folding anti-collision protection unit 5, which is connected to the end of the first rack 121 away from the second rack 221, and thus can be outside the effective folding stroke range of the flipping track unit 2. The folding anti-collision protection unit 5 preferably has a self-locking switch inside. The self-locking switch can be connected to the electric push rod 341 circuit, and the button contact of the self-locking switch is located on the upper surface of the folding anti-collision protection unit 5. When the lifting chair 6 moves to the folding anti-collision protection unit 5, it can trigger the button contact. In actual use, it can be set that when the lifting chair 6 moves from top to bottom, the first time it passes the self-locking switch and presses the button contact, it means that the lifting chair 6 has entered the effective folding area of the flip track unit 2. At this time, the button contact can trigger the electric push rod 341 to cut off the power. The electric push rod 341 cannot start folding in this state. When the lifting chair 6 moves from bottom to top and enters outside the effective folding area of the flip track unit 2, it presses the button contact for the second time. At this time, the self-locking switch is reset, and the electric push rod 341 can reconnect the circuit. The user can control the flip track unit 2 to start folding as needed. By controlling the on and off of the self-locking switch in this way, equipment damage and danger can be avoided.
[0036] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.
Claims
1. A double-rail folding mechanism, characterized in that, The system includes a fixed track unit (1) and a flip track unit (2) for sliding connection of a lifting chair (6). The fixed track unit (1) is connected to the staircase (7). The system also includes a drive unit (3), which includes a first fixed-side connection component (31), a second fixed-side connection component (32), a flip track component (33), a first adjustment component (34), and a second adjustment component (35). The first fixed-side connection component (31) is connected to the high end of the fixed track unit (1), and the second fixed-side connection component (32) is connected to the high end of the lifting chair (6). The lower end of the fixed track unit (1) is connected to the first fixed side connection component (31), the upper end of the first adjustment component (34) is connected to the first fixed side connection component (31), and its lower end is rotatably connected to the upper end of the second adjustment component (35). The second adjustment component (35) is rotatably connected to the second fixed side connection component (32), and its lower end is rotatably connected to the flip side connection component (33). The flip side connection component (33) is connected to the upper end of the flip track unit (2) and rotatably connected to the second fixed side connection component (32).
2. The double-rail folding mechanism according to claim 1, characterized in that, The first fixed-side connection assembly (31) includes an adjusting rod (311) and an adjusting sleeve (312). The adjusting rod (311) is connected to the fixed track unit (1), and the adjusting sleeve (312) is connected to the adjusting rod (311). The high end of the first adjusting assembly (34) is connected to the adjusting sleeve (312).
3. The double-rail folding mechanism according to claim 1, characterized in that, The second fixed-side connecting assembly (32) includes a first connecting piece (321), a connecting rod (322), and a second connecting piece (323). The first connecting piece (321) is connected to the lower end of the fixed track unit (1). The two ends of the connecting rod (322) are respectively connected to the first connecting piece (321) and the second connecting piece (323). The second adjusting assembly (35) is located between the first connecting piece (321) and the second connecting piece (323), and the second adjusting assembly (35) is rotatably connected to the first connecting piece (321) and the second connecting piece (323).
4. The double-rail folding mechanism according to claim 1, characterized in that, The flip-side connecting assembly (33) includes a third connecting piece (331), which is rotatably connected to the second fixed-side connecting assembly (32) and rotatably connected to the second adjusting assembly (35).
5. The double-rail folding mechanism according to claim 1, characterized in that, The first adjustment component (34) includes an electric push rod (341), the cylinder of which is connected to the first fixed side connection component (31), and the extended end of the push rod of the electric push rod (341) is rotatably connected to the high end of the second fixed side connection component (32).
6. The double-rail folding mechanism according to claim 5, characterized in that, The first adjustment assembly (34) further includes a first fixed sleeve (342), a first linear bearing (343), a first guide rod (344), and a guide rod fixing plate (345). The first fixed sleeve (342) is connected to the cylinder of the electric push rod (341) and the first linear bearing (343) respectively. The first guide rod (344) is movably connected to the first linear bearing (343) and is arranged parallel to the push rod. The guide rod fixing plate (345) is connected to the first guide rod (344) and the push rod respectively.
7. The double-rail folding mechanism according to claim 1, characterized in that, The second adjusting assembly (35) includes a second fixed sleeve (351), a second linear bearing (352), a third linear bearing (353), a support rod (354), a second guide rod (355), a third guide rod (356), and a guide rod fixing block (357). One end of the support rod (354) is provided with a tail hinge structure and is rotatably connected to the first adjusting assembly (34) through the tail hinge structure. The other end of the support rod (354) is connected to the second fixed sleeve (351). The second linear bearing (352) and the third linear bearing... (353) is connected to the second fixed sleeve (351) respectively, the second guide rod (355) is movably connected to the second linear bearing (352), the third guide rod (356) is movably connected to the third linear bearing (353), one end of the second guide rod (355) and the third guide rod (356) is connected to the guide rod fixing block (357), the guide rod fixing block (357) is rotatably connected to the flip side connecting assembly (33), and the second fixed sleeve (351) is rotatably connected to the second fixed side connecting assembly (32).
8. The double-rail folding mechanism according to claim 1, characterized in that, The fixed track unit (1) includes a first upper guide rail (11), a first lower guide rail (12), a first connecting structure (13), and a supporting connecting structure (14). The first upper guide rail (11) and the first lower guide rail (12) are arranged in parallel and connected to each other through the first connecting structure (13). A first rack (121) is provided on the first lower guide rail (12). The supporting connecting structure (14) is connected to the first upper guide rail (11), the first lower guide rail (12), and the staircase (7) respectively. The flipping track unit (2) includes a second upper guide rail (21), a second lower guide rail (22) and a second connecting structure (23). The second upper guide rail (21) and the second lower guide rail (22) are arranged in parallel and connected by the second connecting structure (23). A second rack (221) is provided on the second lower guide rail (22). When the flipping track unit (2) is closed relative to the fixed track unit (1), the first upper guide rail (11) and the second upper guide rail (21) are connected, the first lower guide rail (12) and the second lower guide rail (22) are connected, and the first rack (121) and the second rack (221) are connected.
9. The double-rail folding mechanism according to claim 8, characterized in that, It also includes a track closure detection unit (4), which includes a long roller micro switch (41), a switch fixing plate (42) and a detection contact block (43). The switch fixing plate (42) is connected to the lower end of the first rack (121) near the second rack (221). The long roller micro switch (41) is connected to the switch fixing plate (42). The detection contact block (43) is connected to the lower end of the second rack (221) near the first rack (121). When the flip track unit (2) closes to the fixed track unit (1), the detection contact block (43) can form a squeezing contact with the long roller micro switch (41).
10. The double-rail folding mechanism according to claim 8, characterized in that, It also includes a folding anti-collision protection unit (5), which is connected to the end of the first rack (121) away from the second rack (221). The folding anti-collision protection unit (5) is provided with a self-locking switch inside, and the button contact of the self-locking switch is located on the upper surface of the folding anti-collision protection unit (5). When the lifting chair (6) moves relative to the folding anti-collision protection unit (5), it can trigger the button contact.