Double-guide-rail folding mechanism

Abstract

The invention provides a double-guide-rail folding mechanism, and relates to the technical field of stair lifting equipment. The device comprises a fixed rail unit and an overturning rail unit, and further comprises a driving unit, and the driving unit comprises a first fixed side connecting assembly, a second fixed side connecting assembly, an overturning side connecting assembly, a first adjusting assembly and a second adjusting assembly. The combined structure of the first adjusting assembly and the second adjusting assembly is arranged, the first adjusting assembly has the independent stroke of the first adjusting assembly, the second adjusting assembly also has the independent stroke of the second adjusting assembly, the first adjusting assembly and the second adjusting assembly can work at the same time on the basis of relative rotation between the first adjusting assembly and the second adjusting assembly, folding time is effectively shortened, and folding efficiency is improved. Compared with the prior art, the whole stroke is adjusted, more labor and electricity are saved, meanwhile, the driving unit can achieve multiple rotation, finally, the overturning side connecting assemblies and the overturning track unit are rotated and folded by a larger angle, the folding range is wider, and the occupied space after folding is further reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of stair lifting equipment, and in particular to a double-guide rail folding mechanism. Background Art

[0002] A stair lift is an elevator that runs on the side of the stairs. Its main function is to help people with limited mobility go up and down the stairs. The chair lift is generally composed of three parts: a track, a drive unit, and a seat. The drive unit and the seat are installed together, so from the outside, the chair lift looks like a chair running on tracks. In actual use, there are situations where the doorway and the aisle are too close to the stairs, resulting in the chair lift's tracks usually being fixed along the stair steps and extending to the ground so that the chair lift can slide smoothly to the ground. However, the tracks will occupy part of the doorway and aisle space, which will have a certain impact on the opening and closing of the door and walking in the aisle, posing a safety hazard. In order to solve the above problems, some new stair lifts have appeared on the market. By adjusting the part of the track closest to the doorway and the aisle to a foldable structure, the problem of occupying part of the doorway and aisle space can be solved to a certain extent.

[0003] The applicant has found that there are at least the following technical problems in the prior art: although the existing stair lift chair adopts a foldable structure, the driving stroke of the driving mechanism used to drive the folding is long, resulting in a long folding time and being more labor-intensive and power-consuming. In addition, the folding angle and folding range are relatively limited, and the problem of occupying space still exists after folding into place. Summary of the Invention

[0004] The purpose of the present invention is to provide a dual-guide rail folding mechanism to solve the technical problems existing in the prior art. The various technical effects that can be produced by the preferred technical solution among the various technical solutions provided by the present invention are described in detail below.

[0005] To achieve the above objectives, the present invention provides the following technical solutions: A double-guide rail folding mechanism includes a fixed track unit and a flip track unit for sliding connection of a lift chair, the fixed track unit is connected to the stairs, and also includes a driving unit, the driving unit includes a first fixed side connecting component, a second fixed side connecting component, a flip 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 track unit, the second fixed side connecting component is connected to the low end of the fixed track 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 flip side connecting component, the flip side connecting component is connected to the high end of the flip track unit and is rotatably connected to the second fixed side connecting component.

[0006] Preferably, the first fixed side connection component includes an adjustment rod and an adjustment sleeve, the adjustment rod is connected to the fixed track unit, the adjustment sleeve is connected to the adjustment rod, and the high end of the first adjustment component is connected to the adjustment 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 adjustment assembly is located between the first connecting piece and the second connecting piece, and the second adjustment assembly is rotatably connected to the first connecting piece and the second connecting piece respectively.

[0008] Preferably, the flip-side connecting assembly includes a third connecting piece, and the third connecting piece is rotatably connected to the second fixed-side connecting assembly and is rotatably connected to the second adjusting assembly.

[0009] Preferably, the first adjustment component includes an electric push rod, the cylinder of the electric push rod 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 adjustment assembly also includes a first fixed sleeve, a first linear bearing, a first guide rod and a guide rod fixing plate, the first fixed sleeve is respectively connected to the cylinder body of the electric push rod and the first linear bearing, the first guide rod is movably connected to the first linear bearing and is arranged parallel to the push rod, and the guide rod fixing plate is respectively connected to the first guide rod and the push rod.

[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, the second guide rod and the third guide rod each have one end connected to the guide rod fixing block, the guide rod fixing block is rotatably connected to the flip side connecting assembly, and 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 in parallel and the two are connected by the first connecting structure, the first lower guide rail is provided with a first rack, and the supporting connecting structure is respectively connected to the first upper guide rail, the first lower guide rail and the stairs; The flip track unit includes a second upper guide rail, a second lower guide rail and a second connecting structure, the second upper guide rail is arranged in parallel with the second lower guide rail and the two are connected by the second connecting structure, and the second lower guide rail is provided with a second rack; When the flip track unit is closed relative to the fixed track unit, the first upper guide rail is docked with the second upper guide rail, the first lower guide rail is docked with the second lower guide rail, and the first rack is docked with the second rack.

[0013] Preferably, it also includes a track closure detection unit, which includes a long roller micro switch, a switch fixing plate and a detection contact block, the switch fixing plate is connected to the bottom of the first rack near one end of the second rack, the long roller micro switch is connected to the switch fixing plate, and the detection contact block is connected to the bottom of the second rack near one end of the first rack. When the flip track unit is closed into position relative to the fixed track unit, the detection contact block can form an extrusion contact with the long roller micro switch.

[0014] Preferably, it also includes a folding anti-collision protection unit, which is connected to the end of the first rack away from the second rack. A self-locking switch is provided inside the folding anti-collision protection unit 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, the button contact can be triggered.

[0015] The beneficial effects of the present invention are: on the basis of the driving stroke of the original single driving mechanism, by adjusting to a combined structure of the first adjusting component and the second adjusting component, the first adjusting component has its own independent stroke, and the second adjusting component also has its own independent stroke. On the basis of the relative rotation between the two, the first adjusting component and the second adjusting component can operate simultaneously, effectively shortening the folding time, adjusting the overall stroke, saving more effort and electricity, and at the same time, the driving unit can realize multiple rotations with the cooperation of the above components, and finally enable the flip side connecting component and the flip track unit to rotate and fold at a larger angle relative to the fixed track unit, and the folding range is wider, which can also further reduce the occupied space after folding. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 This is a structural diagram of the fixed track unit and the flip track unit of the present invention in a closed state; Figure 2 It is a structural diagram of the fixed track unit and the flip track unit of the present invention in a folded state; Figure 3 This is a detailed structural diagram of the present invention where the angle between the fixed track unit and the flip track unit is 0°; Figure 4 This is a detailed structural diagram of the present invention where the angle between the fixed track unit and the flip track unit is 90°; Figure 5 This is a detailed structural diagram of the present invention where the angle between the fixed track unit and the flip track unit is 180°; Figure 6 for Figure 3 A magnified structural diagram at center A; In the figure, 1 is a fixed track unit; 11 is a first upper guide rail; 12 is a first lower guide rail; 121 is a first rack; 13 is a first connecting structure; 14 is a 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 fixing sleeve; 343. First linear bearing; 344. First guide rod; 345. Guide rod fixing piece; 35. Second adjusting assembly; 351. Second fixing 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. Folding anti-collision protection unit; 6. Chair lift; 7. Stairs. DETAILED DESCRIPTION

[0018] To make the objectives, technical solutions, and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is apparent that the embodiments described are only a portion of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other implementations obtained by those of ordinary skill in the art without inventive effort are within the scope of protection of the present invention. In the description of the present invention, it should be understood that the terms "center", "lateral", "length", "width", "height", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "side" and the like indicate positions or location relationships based on the attached Figure 1 The orientation or positional relationship shown is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0019] It should also be noted that, in the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; and direct or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the present invention depending on the specific circumstances.

[0020] Reference Figures 1 to 6The present invention provides a double-guide rail folding mechanism, comprising a fixed rail unit 1 and a flip rail unit 2 for sliding connection of a lift chair 6, wherein the fixed rail unit 1 is connected to a staircase 7; The drive unit 3 includes a first fixed-side connecting component 31, a second fixed-side connecting component 32, a flip-side connecting component 33, a first adjusting component 34 and a second adjusting component 35; The fixed track unit 1 and the flip track unit 2 are arranged tilted from top to bottom, the first fixed side connecting component 31 is connected to the upper end of the fixed track unit 1, and the second fixed side connecting component 32 is connected to the lower end of the fixed track unit 1; The upper end of the first adjusting assembly 34 is connected to the first fixed-side connecting assembly 31 and the lower end thereof is rotatably connected to the upper end of the second adjusting assembly 35. The second adjusting assembly 35 is rotatably connected to the second fixed-side connecting assembly 32 and the lower end thereof is rotatably connected to the flip-side connecting assembly 33. Driven by the first adjusting assembly 34, the second adjusting assembly 35 can rotate relative to the second fixed-side connecting assembly 32 and drive the flip-side connecting assembly 33. The flip side connecting component 33 is connected to the high end of the flip track unit 2 and is rotationally connected to the second fixed side connecting component 32. Driven by 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 drive the flip track unit 2 to move synchronously.

[0021] Therefore, on the basis of the driving stroke of the original single driving mechanism, it is adjusted to a combined structure of the first adjusting component 34 and the second adjusting component 35. The first adjusting component 34 has its own independent stroke, and the second adjusting component 35 also has its own independent stroke. On the basis of the relative rotation between the two, the first adjusting component 34 and the second adjusting component 35 can operate at the same time, effectively shortening the folding time, adjusting the overall stroke, saving more effort and energy. At the same time, the driving unit 3 can realize multiple rotations with the cooperation of the above components, and finally enables the flip side connecting component 33 and the flip track unit 2 to be rotated and folded at a larger angle relative to the fixed track unit 1, and the folding range is wider, which can further reduce the occupied space after folding.

[0022] As an optional embodiment, the first fixed side connection assembly 31 includes an adjustment rod 311 and an adjustment sleeve 312. The adjustment rod 311 is connected to the fixed track unit 1, and is preferably connected to the first upper guide rail 11 and the first lower guide rail 12 at the same time in a detachable connection. The adjustment sleeve 312 is connected to the adjustment rod 311, preferably in a detachable connection, and the relative position of the adjustment sleeve 312 and the adjustment rod 311 can be adjusted; The upper end of the first adjustment component 34 is connected to the adjustment sleeve 312, and the connection is preferably detachable. The two remain relatively fixed, and the upper end of the first adjustment component 34 does not rotate relative to each other. During actual application, the first fixed-side connecting component 31 remains relatively stationary as a whole and does not produce relative rotation.

[0023] As an optional embodiment, 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, and is preferably detachably connected. The two ends of the connecting rod 322 are respectively connected to the first connecting piece 321 and the second connecting piece 323, and are preferably detachably connected. 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 arrangement, the second adjustment assembly 35 can rotate relative to the second fixed-side connecting assembly 32. Furthermore, the second connecting piece 323 can enhance the lateral force balance of the second fixing sleeve 351 of the second adjustment assembly 35, thereby providing lateral support for the second fixing sleeve 351. When the second adjustment assembly 35 rotates relative to the second fixing sleeve 351, the forces on both sides are more evenly distributed, thereby reducing shaking. During actual application, the second fixed-side connecting assembly 32 remains relatively stationary as a whole and does not produce relative rotation.

[0024] As an optional embodiment, the flip side connection assembly 33 includes a third connection piece 331, which 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 connection piece 331 can move synchronously with the flip track unit 2, and the third connection piece 331 is rotationally connected to the second fixed side connection assembly 32. When the third connection piece 331 rotates, it can drive the flip track unit 2 to rotate synchronously. The third connection piece 331 is rotationally connected to the second adjustment assembly 35. Under the driving action of the second adjustment assembly 35, the third connection piece 331 can rotate relative to the second fixed side connection assembly 32.

[0025] As an optional embodiment, the first adjustment component 34 includes an electric push rod 341, the cylinder body of the electric push rod 341 is connected to the adjustment sleeve 312 of the first fixed side connection component 31, and the connection here is a detachable connection while being able to remain 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 process of extending and retracting, 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 provided with an in-position limit switch, and when the push rod of the electric push rod 341 reaches the maximum stroke, the electric push rod 341 can be powered off and stop running; Furthermore, the electric push rod 341 is preferably connected in series with a self-resetting fuse through the circuit. When the flip track unit 2 encounters an obstacle during the retraction and extension process, 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 is de-energized and 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 powered on and started running.

[0027] Furthermore, in order to prevent the push rod of the electric push rod 341 from bending and deforming during the force application process, as an optional embodiment, the first adjustment assembly 34 further 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 fixing 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 piece 345 is connected to the first guide rod 344 and the push rod respectively. During the process of extending or retracting the push rod of the electric push rod 341, the guide rod fixing plate 345 can be extended or retracted 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, thereby guiding the push rod of the electric push rod 341 through the first guide rod 344 and the first linear bearing 343, thereby reducing its bending deformation due to force.

[0028] As an optional embodiment, 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 assembly 34 through the tail hinge structure, and the other end of the support rod 354 is connected to the second fixing 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, and 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.

[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 only linear movement, and convert the rotation and linear movement of the third guide rod 356 relative to the third linear bearing 353 into only linear movement.

[0030] The application principle of the double-guide rail folding mechanism is as follows: during the extension or retraction of the push rod of the electric push rod 341 of the first adjusting assembly 34, the tail hinge structure of the support rod 354 can be driven to extend or retract, and at the same time, the support rod 354 is restricted by the rotation connection between the second fixing sleeve 351 and the second fixed side connecting assembly 32, and the support rod 354 can rotate relative to the connection point between the second fixing sleeve 351 and the second fixed side connecting assembly 32, which is equivalent to driving the second adjusting assembly 35 to rotate relative to the whole. In the rotation process, 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 fixing sleeve 351, thereby driving the flip side connecting assembly 33 and the flip track unit 2 to rotate relative to the fixed track unit 1 and the second fixed side connecting assembly 32, thereby realizing flipping; In this embodiment, through the careful design of the above structure, the flip side connecting assembly 33 and the flip track unit 2 can be rotated and folded from 0° to 180° relative to the fixed track unit 1, with a larger folding angle and a wider folding range, further reducing the occupied space after folding; It is also worth noting that the second adjustment component 35 only needs to be flipped 90° as a whole to achieve the overall flipping of the flip side connection component 33 and the flip track unit 2 by 180°. The first adjustment component 34 and the second adjustment component 35 cooperate with each other to effectively reduce the overall stroke of the push rod, saving more effort and energy.

[0031] As an optional embodiment, 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 structural form of the first connecting structure 13 is not specifically limited here. The drawings of this embodiment 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, and the first rack 121 is used to cooperate with the power mechanism of the lift chair 6 for relative movement; The supporting 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 supporting connection structure 14 is connected to the staircase 7 . Therefore, the fixed track unit 1 is actually connected to the staircase 7 through the supporting connection structure 14 .

[0032] As an optional embodiment, the flip 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 structural form of the second connecting structure 23 is not specifically limited here. The drawings of this embodiment 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 , and the second rack 221 is used to cooperate with the power mechanism of the lift chair 6 for relative movement.

[0033] When the flip 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 the axes of the two are also located on the same straight line, forming a single guide rail in appearance. The first lower guide rail 12 and the second lower guide rail 22 are connected, and the axes of the two are also located on the same straight line, forming a single guide rail in appearance. The first rack 121 and the second rack 221 are connected, and the two form a continuous rack in appearance. The chair lift 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 chair lift 6 in cooperation with the first rack 121 and the second rack 221 .

[0034] As an optional embodiment, in order to prevent the chair lift 6 from having a safety hazard when ascending or descending due to the fixed track unit 1 and the flip track unit 2 not being completely closed, the dual-track folding mechanism further includes a track closure detection unit 4, which is arranged at the junction 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 portion of the first rack 121 near the end of 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 portion of the second rack 221 near the end of the first rack 121 and is relatively located above the long roller micro switch 41. When the flip track unit 2 is closed in place relative to the fixed track unit 1, the detection contact block 43 can form an extrusion contact with the long roller microswitch 41. The long roller microswitch 41 is connected through the circuit and can feedback the signal that the flip track unit 2 is completely closed to the lift chair 6. The lift chair 6 can move up or down. On the contrary, when the detection contact block 43 does not press the long roller microswitch 41, the long roller microswitch 41 feedbacks the signal that the flip track unit 2 is not completely closed to the lift chair 6. The lift chair 6 will not start and will not move up or down.

[0035] In fact, during the use of the lift chair 6, there may be a situation where the track folds due to user misoperation before the lift chair 6 leaves the effective folding travel range of the flip track unit 2, which may easily cause damage to the equipment and may also cause danger; Therefore, as an optional embodiment, the dual-guide rail folding mechanism further includes a folding anti-collision protection unit 5, which is connected to an end of the first rack 121 away from the second rack 221, so that it can be outside the effective folding travel range of the flip track unit 2; A self-locking switch is preferably provided inside the folding anti-collision protection unit 5. 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 relative to the folding anti-collision protection unit 5, the button contact can be triggered. During actual use, it can be set that when the lift chair 6 runs from top to bottom, it passes the self-locking switch for the first time and presses the button contact, which means that the lift 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, and the electric push rod 341 cannot start folding in this state. When the lift chair 6 runs from bottom to top and enters 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. The on and off of the self-locking switch is cyclically controlled in this way, which can avoid damage to the equipment and avoid causing danger.

[0036] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A double-guide rail folding mechanism, characterized in that: The invention relates to a lifting chair (6) comprising a fixed track unit (1) and a flip track unit (2) for sliding connection, wherein the fixed track unit (1) is connected to a staircase (7), and further comprising a driving unit (3), wherein the driving unit (3) comprises a first fixed side connecting component (31), a second fixed side connecting component (32), a flip side connecting component (33), a first adjusting component (34) and a second adjusting component (35), wherein the first fixed side connecting component (31) is connected to the upper end of the fixed track unit (1), and the second fixed side connecting component (32) is connected to the flip side connecting component (33). The lower end of the fixed track unit (1) is connected, the upper end of the first adjustment component (34) is connected to the first fixed side connection component (31) and the lower end thereof is rotationally connected to the upper end of the second adjustment component (35), the second adjustment component (35) is rotationally connected to the second fixed side connection component (32) and the lower end thereof is rotationally connected to the flip side connection component (33), and the flip side connection component (33) is connected to the upper end of the flip track unit (2) and rotationally connected to the second fixed side connection component (32).

2. The double-guide rail folding mechanism according to claim 1, characterized in that: The first fixed side connection assembly (31) comprises an adjustment rod (311) and an adjustment sleeve (312), the adjustment rod (311) being connected to the fixed track unit (1), the adjustment sleeve (312) being connected to the adjustment rod (311), and the high end of the first adjustment assembly (34) being connected to the adjustment sleeve (312).

3. The double-guide rail folding mechanism according to claim 1, characterized in that: The second fixed side connection component (32) comprises a first connection piece (321), a connection rod (322) and a second connection piece (323); the first connection piece (321) is connected to the lower end of the fixed track unit (1); the two ends of the connection rod (322) are respectively connected to the first connection piece (321) and the second connection piece (323); the second adjustment component (35) is located between the first connection piece (321) and the second connection piece (323), and the second adjustment component (35) is rotatably connected to the first connection piece (321) and the second connection piece (323).

4. The double-guide rail folding mechanism according to claim 1, characterized in that: The flip side connection assembly (33) comprises a third connection piece (331), and the third connection piece (331) is rotationally connected to the second fixed side connection assembly (32) and is rotationally connected to the second adjustment assembly (35).

5. The double-guide rail folding mechanism according to claim 1, characterized in that: The first adjustment component (34) includes an electric push rod (341), a cylinder of the electric push rod (341) is connected to the first fixed side connection component (31), and an extended end of the push rod of the electric push rod (341) is rotatably connected to the high-position end of the second fixed side connection component (32).

6. The double-guide rail folding mechanism according to claim 5, characterized in that: The first adjustment component (34) further includes a first fixing sleeve (342), a first linear bearing (343), a first guide rod (344) and a guide rod fixing plate (345), wherein the first fixing sleeve (342) is respectively connected to the cylinder body of the electric push rod (341) and the first linear bearing (343), the first guide rod (344) is movably connected to the first linear bearing (343) and is arranged parallel to the push rod, and the guide rod fixing plate (345) is respectively connected to the first guide rod (344) and the push rod.

7. The double-guide rail folding mechanism according to claim 1, characterized in that: The second adjustment component (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 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 connected to the second guide rod (355). (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), the second guide rod (355) and the third guide rod (356) both have one end 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-guide rail folding mechanism according to claim 1, characterized in that: The fixed track unit (1) comprises 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 are connected via the first connecting structure (13); a first rack (121) is provided on the first lower guide rail (12); and the supporting connecting structure (14) is respectively connected to the first upper guide rail (11), the first lower guide rail (12) and the staircase (7); The flip track unit (2) comprises 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 via the second connecting structure (23); and a second rack (221) is provided on the second lower guide rail (22); When the flip 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-guide rail folding mechanism according to claim 8, characterized in that: The invention also includes a track closure detection unit (4), wherein the track closure detection unit (4) includes a long roller micro switch (41), a switch fixing plate (42) and a detection contact block (43), wherein the switch fixing plate (42) is connected to the lower part of the first rack (121) near one end of the second rack (221), the long roller micro switch (41) is connected to the switch fixing plate (42), and the detection contact block (43) is connected to the lower part of the second rack (221) near one end of the first rack (121), and when the flip track unit (2) is closed in place relative to the fixed track unit (1), the detection contact block (43) can form a squeeze contact with the long roller micro switch (41).

10. The double-guide rail folding mechanism according to claim 8, characterized in that: The invention also includes a folding anti-collision protection unit (5), wherein the folding anti-collision protection unit (5) is connected to an end of the first rack (121) away from the second rack (221), a self-locking switch is provided inside the folding anti-collision protection unit (5), and a button contact of the self-locking switch is located on the upper surface of the folding anti-collision protection unit (5), and the button contact can be triggered when the lifting chair (6) moves relative to the folding anti-collision protection unit (5).

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