Wheelchair bed convenient to transfer and butt joint and control method

Abstract

The invention belongs to the technical field of wheelchair beds, and particularly relates to a wheelchair bed facilitating transfer and butt joint and a control method. The wheelchair bed comprises a bottom frame, a hip mechanism, a walking mechanism, a back mechanism, a leg mechanism, a foot mechanism, a posture changing device and an armrest mechanism. The armrest mechanism comprises a]-shaped support fixedly installed on the back of the back mechanism, a connecting block installed on the]-shaped support, an armrest pipe shaft installed on the connecting block in a sliding mode in the X-axis direction, an armrest fixedly installed at the outer end of the armrest pipe shaft, an L-shaped limiting stop block and a limiting protruding block, and when the armrest is unfolded, the armrest is pulled out towards the left side and the right side of the bottom frame; and when the armrests are retracted, the armrests rotate clockwise around the X-axis, the armrests are pushed towards the inner side of the bottom frame, and the armrests are retracted into a cavity between the]-shaped bracket and the back mechanism, so that the problem that the wheelchair bed cannot be in seamless butt joint with a medical bed when a patient is transferred is solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of wheelchair beds, and particularly relates to a wheelchair bed convenient for transfer docking and a control method therefor. Background Art

[0002] A wheelchair bed can be used as a wheelchair to facilitate the movement of users and can also be converted into a bed posture to help patients with limited mobility complete the body position transfer from a medical bed to a wheelchair or from a wheelchair to a medical bed. In recent years, it has been widely used in hospitals or daily life.

[0003] We know that to ensure the safety of patients, armrest mechanisms are provided on both sides of the seat of the wheelchair. For existing wheelchair beds, to achieve the safety guarantee for patients in the wheelchair state and the smooth progress of patient transfer in the bed posture, the armrest mechanisms are mostly installed on both sides of the hip mechanism and use up-and-down folding armrests. The structure of this kind of armrest mechanism does not have power support. In the wheelchair state, it is easy to automatically fold down due to external force, bringing safety risks to patients and occupying a large space. When in the folded-down state, the armrest mechanism cannot be completely retracted into the wheelchair bed body, resulting in a large gap when the wheelchair bed is docked with the medical bed, making it impossible for the patient transfer movement to proceed smoothly. Summary of the Invention

[0004] The object of the present invention is to overcome the defect that there is a large gap when the wheelchair bed is docked with the medical bed due to the existence of the armrest mechanism of the wheelchair bed in the prior art and the patient transfer movement cannot proceed smoothly, and to provide a wheelchair bed convenient for transfer docking and a control method therefor, which can completely retract the armrest mechanism into the wheelchair bed and has high stability.

[0005] The technical solution adopted by the present invention to solve its technical problems is as follows:

[0006] In a first aspect, a wheelchair bed convenient for transfer docking includes: a chassis, a hip mechanism horizontally installed above the chassis, a walking mechanism installed below the chassis, a back mechanism and a leg mechanism rotatably connected to the hip mechanism, a foot mechanism rotatably connected to the leg mechanism, a posture transformation device for the wheelchair bed to perform multi-posture transformation, and armrest mechanisms symmetrically installed on both sides of the back mechanism;

[0007] The armrest mechanism includes a "]"-shaped bracket fixedly installed behind the back mechanism, a connection block installed on the "]"-shaped bracket, an armrest tube shaft slidably installed on the connection block along the X-axis direction, an armrest fixedly installed at the outer end of the armrest tube shaft, a "┘"-shaped limit stop fixedly installed on the armrest, and a limit convex block fixedly installed on the "]"-shaped bracket; the armrest follows the armrest tube shaft to slide along the X-axis direction and / or rotate around the X-axis axis;

[0008] When the armrest is in the unfolded state, the "┘"-shaped limit stop block and the limit bump limit the upper and lower surfaces; when the armrest is in the retracted state, the "┘"-shaped limit stop block and the connecting block limit the left and right surfaces, and the armrest is retracted into the cavity between the "]"-shaped bracket and the back mechanism.

[0009] Further, the traveling mechanism includes:

[0010] At least two front universal wheels symmetrically installed at the front end of the chassis;

[0011] A "∫"-shaped connecting frame symmetrically and fixedly installed on both sides of the rear end of the chassis, and the upper end of the "∫"-shaped connecting frame extends towards the rear side of the chassis;

[0012] A power conversion assembly installed on the "∫"-shaped connecting frame;

[0013] A rear universal wheel and a power wheel, both installed on the power conversion assembly, and the rear universal wheel and the power wheel do not contact the ground simultaneously.

[0014] Further, the power conversion assembly includes:

[0015] A conversion stepped crossbeam rotatably installed on the chassis;

[0016] A fine-tuning connecting frame fixedly installed on the conversion stepped crossbeam;

[0017] A fine-tuning long hole vertically opened on the fine-tuning connecting frame;

[0018] A power conversion push rod, the fixed end of the power conversion push rod is rotatably connected to the "∫"-shaped connecting frame, and the telescopic end of the power conversion push rod is slidably arranged in the fine-tuning long hole through a pin shaft;

[0019] The power wheel is installed at the front end of the conversion stepped crossbeam, and the rear universal wheel is installed at the rear end of the conversion stepped crossbeam.

[0020] Further, the conversion stepped crossbeam includes a front low stepped portion and a rear high stepped portion, the rear universal wheel is installed on the rear high stepped portion, the power wheel is installed on the front low stepped portion, and the rotational connection between the conversion stepped crossbeam and the chassis is located on the rear high stepped portion.

[0021] Further, the traveling mechanism further includes an anti-tipping component, the anti-tipping component includes an anti-tipping frame fixedly installed behind the "∫"-shaped connecting frame and an anti-tipping wheel installed on the anti-tipping frame;

[0022] During use, the front universal wheels and the anti-tipping wheels are always in contact with the ground.

[0023] Furthermore, the posture transformation device includes a back transformation mechanism for back transformation, a leg transformation mechanism for leg transformation, and a foot-leg linkage assembly that follows the transformation of the leg transformation mechanism;

[0024] The back transformation mechanism includes: a back transformation push rod and a back air spring respectively installed on the two "∫"-shaped connecting frames;

[0025] The fixed end of the back transformation push rod is rotatably installed on the corresponding "∫"-shaped connecting frame, and the telescopic end of the back transformation push rod is rotatably connected to the upper part of the "]"-shaped bracket on the same side;

[0026] Both ends of the back air spring are respectively installed on the corresponding "]"-shaped bracket and the "∫"-shaped connecting frame on the same side.

[0027] Furthermore, the leg transformation mechanism includes:

[0028] A support frame fixedly installed at the front end of the base;

[0029] A second bracket fixedly installed on the support frame;

[0030] A lower shaft frame rotatably installed on the second bracket;

[0031] A lower limit block fixedly arranged on the second bracket for limiting the rotation of the lower shaft frame relative to the second bracket;

[0032] A leg transformation plate fixedly installed below the leg mechanism;

[0033] And a leg transformation push rod rotatably installed on the lower shaft frame, the fixed end of the leg transformation push rod is rotatably connected to the lower shaft frame, and the telescopic end of the leg transformation push rod is rotatably connected to the leg transformation plate.

[0034] Furthermore, the foot-leg linkage assembly includes:

[0035] An L-shaped connecting rod with one end fixedly installed on the foot mechanism;

[0036] An S-shaped connecting rod rotatably connected to the other end of the L-shaped connecting rod;

[0037] The end of the S-shaped connecting rod away from the L-shaped connecting rod is rotatably installed on the leg mechanism through a connecting piece.

[0038] Furthermore, the leg mechanism includes:

[0039] A leg bracket rotatably connected to the hip mechanism;

[0040] A leg drive mechanism installed at the lower end of the leg bracket;

[0041] The leg driving roller and the leg driven roller; the leg driving roller is in transmission connection with the leg driving mechanism through a fifth transmission component, and the leg driving roller and the leg driven roller are in transmission connection through a leg transfer annular belt;

[0042] The leg anti-jamming belt device is arranged in the annular cavity of the leg transfer annular belt; the leg transformation is connected to both ends of the leg bracket.

[0043] Further, the leg anti-jamming belt device includes two leg anti-jamming rollers arranged on both sides of the back bracket, a leg anti-jamming annular belt wound around the two leg anti-jamming rollers, a plurality of first transmission teeth arranged on the inner side surface of the back annular transfer belt along the Z-axis direction, and a plurality of second transmission teeth arranged on the outer side surface of the leg anti-jamming annular belt and in transmission cooperation with the first transmission teeth;

[0044] The back bracket is arranged in the annular cavity of the first anti-jamming annular belt, and the back bracket, the leg anti-jamming annular belt, and the leg transfer annular belt form a three-layer covering structure from the inside to the outside.

[0045] In a second aspect, a control method for a wheelchair bed facilitating transfer and docking includes the following content:

[0046] When moving in a sitting or lying posture is required, the armrest is in an unfolded state, the armrest is perpendicular to the "]"-shaped bracket, and the upper end surface of the "┘"-shaped limit stop abuts against and limits the lower end surface of the limit protrusion;

[0047] When wheelchair bed transfer and docking is required, manually rotate the armrest clockwise by 90 degrees, push the rotated armrest towards the inner side of the wheelchair bed until the "┘"-shaped limit stop abuts against the connection block; start the posture transformation device to convert the wheelchair bed from a sitting posture to a lying posture; adjust the traveling mechanism to a powerless state; when in the powerless state, the rear universal wheel contacts the ground.

[0048] The beneficial effects of the wheelchair bed facilitating transfer and docking and the control method of the present invention are:

[0049] The armrest mechanism of the present invention abandons the traditional up-and-down flipping structure rotatably installed on both sides of the hip mechanism. Instead, a "]"-shaped bracket is installed behind the back mechanism. The armrest is slidably arranged along the x-axis direction through an armrest tube shaft and a connecting block, and is rotatably connected to the connecting block around the X-axis. When the armrest needs to be unfolded, only pull the armrest out to the left and right sides of the chassis and rotate it counterclockwise by 90 degrees around the X-axis. When the armrest needs to be retracted, rotate the armrest clockwise by 90 degrees around the X-axis, push the armrest inward to the chassis, and the armrest is completely retracted into the cavity between the "]"-shaped bracket and the back mechanism, solving the problem that there is a large gap between the wheelchair bed and the medical bed during the patient transfer movement and they cannot be butted without gaps. Moreover, a "┘"-shaped limit stop and a limit convex block are cleverly arranged to limit the armrest, preventing the armrest from failing due to external forces. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] The present invention will be further described in detail below with reference to the drawings and specific embodiments.

[0051] Figure 1 It is a schematic structural diagram of the sitting posture of the wheelchair bed according to an embodiment of the present invention.

[0052] Figure 2 is Figure 1 The enlarged view of A in

[0053] Figure 3 It is a schematic structural diagram of the lying posture of the wheelchair bed according to an embodiment of the present invention.

[0054] Figure 4 It is a partial structural diagram of the wheelchair bed in the lying posture according to an embodiment of the present invention.

[0055] Figure 5 is Figure 4 The enlarged view of B in

[0056] Figure 6 It is a schematic structural diagram of the lower perspective of the wheelchair bed according to an embodiment of the present invention.

[0057] Figure 7 It is a schematic structural diagram of the leg mechanism according to an embodiment of the present invention.

[0058] Figure 8 It is a schematic internal structural diagram of the leg mechanism according to an embodiment of the present invention.

[0059] Figure 9 It is a schematic diagram of the hip mechanism according to an embodiment of the present invention.

[0060] Figure 10 It is a schematic internal structural diagram of the first hip transfer assembly according to an embodiment of the present invention.

[0061] Figure 11It is a schematic structural diagram of the walking mechanism according to an embodiment of the present invention.

[0062] Figure 12 It is a partial structural schematic diagram of the walking mechanism according to an embodiment of the present invention.

[0063] In the figure: 1, chassis; 2, hip mechanism, 21, hip frame, 22, hip drive mechanism, 23, first transmission assembly, 24, first hip transfer assembly, 241, first hip transfer roller, 242, second hip transfer roller, 243, first belt drive gear, 244, second belt drive gear, 245, hip transfer endless belt, 246, hip anti-jamming belt device, 25, second transmission assembly, 26, second hip transfer assembly, 27, toilet cavity, 28, partition swing device, 281, first bracket, 282, first swing bracket, 283, partition swing push rod, 284, partition assembly, 2841, seat plate swing frame, 2842, passive rotating roller, 2843, passive transfer belt, 2844, swing support plate; 3, walking mechanism, 31, front universal wheel, 32, "∫"-shaped connecting frame, 33, power conversion assembly, 331, conversion stepped cross beam, 3311, front low stepped part, 3312, rear high stepped part, 332, fine adjustment connecting frame, 333, fine adjustment long hole, 334, power conversion push rod, 34, rear universal wheel, 35, power wheel, 36, anti-tipping assembly, 361, anti-tipping frame, 362, anti-tipping wheel; 4, back mechanism; 5, leg mechanism, 51, leg bracket, 52, leg drive mechanism, 521, first drive mounting frame, 522, leg transfer motor, 523, leg driving gear, 524, leg driven gear, 53, leg driving roller, 54, leg driven roller, 55, leg transfer endless belt, 56, leg anti-jamming belt device, 561, leg anti-jamming roller, 562, leg anti-jamming endless belt, 563, fifth transmission gear, 564, sixth transmission gear, 57, fifth transmission assembly; 6, foot mechanism; 7, attitude transformation device, 71, back transformation mechanism, 711, back transformation push rod, 712, back air spring, 72, leg transformation mechanism, 721, support frame, 722, second bracket, 723, lower shaft frame, 724, lower limit block, 725, leg transformation plate, 726, leg transformation push rod, 73, foot-leg linkage assembly, 731, L-shaped connecting rod, 732, S-shaped connecting rod; 8, armrest mechanism, 81, "]"-shaped bracket, 82, connecting block, 83, armrest tube shaft, 84, armrest, 85, "┘"-shaped limit block, 86, limit convex block. Detailed implementation manners

[0064] Now, the present invention will be further described in detail with reference to the accompanying drawings. These drawings are all simplified schematic diagrams, only illustrating the basic structure of the present invention in a schematic manner, so they only show the components related to the present invention.

[0065] AsFigures 1 - 12 A specific embodiment of a wheelchair bed facilitating transfer docking according to the present invention shown in the figure includes: a chassis 1, a hip mechanism 2 horizontally installed above the chassis 1, a traveling mechanism 3 installed below the chassis 1, a back mechanism 4 and a leg mechanism 5 rotatably connected to the hip mechanism 2, a foot mechanism 6 rotatably connected to the leg mechanism 5, a posture transformation device 7 for performing multi-posture transformation of the wheelchair bed, and armrest mechanisms 8 symmetrically installed on both sides of the back mechanism 4. Among them, the armrest mechanism 8 includes a "]"-shaped bracket 81 fixedly installed behind the back mechanism 4, a connecting block 82 installed on the "]"-shaped bracket 81, an armrest tube shaft 83 slidably installed on the connecting block 82 along the X-axis direction, an armrest 84 fixedly installed at the outer end of the armrest tube shaft 83, an "┘"-shaped limit stop 85 fixedly installed on the armrest 84, and a limit projection 86 fixedly installed on the "]"-shaped bracket 81; the armrest 84 slides along the X-axis direction and / or rotates around the X-axis axis following the armrest tube shaft 83.

[0066] As Figures 2 to 5 shown, when the armrest 84 is in the unfolded state, the "┘"-shaped limit stop 85 and the limit projection 86 perform upper and lower surface limiting; when the armrest 84 is in the retracted state, the "┘"-shaped limit stop 85 and the connecting block 82 perform left and right surface limiting, and the armrest 84 is retracted into the cavity between the "]"-shaped bracket 81 and the back mechanism 4.

[0067] The armrest mechanism 8 of this embodiment abandons the traditional up-and-down flipping structure rotatably installed on both sides of the hip mechanism 2, but installs a "]"-shaped bracket 81 behind the back mechanism 4. The armrest 84 is slidably arranged along the x-axis direction through the armrest tube shaft 83 and the connecting block 82, and is rotatably connected to the connecting block 82 around the X-axis axis. When the armrest 84 needs to be unfolded, only need to pull the armrest 84 out to the left and right sides of the chassis 1 and rotate it counterclockwise by 90 degrees around the X-axis axis. When the armrest 84 needs to be retracted, rotate the armrest 84 clockwise by 90 degrees around the X-axis axis, push the armrest 84 inward to the chassis 1, and the armrest 84 is completely retracted into the cavity between the "]"-shaped bracket 81 and the back mechanism 4, solving the problem that there is a large gap between the wheelchair bed and the medical bed during the patient transfer movement and there is no gapless docking. And the "┘"-shaped limit stop 85 and the limit projection 86 are cleverly set to limit the armrest 84, and the situation that the armrest 84 fails due to external force will not occur.

[0068] In this embodiment, the left, right, up, down, front, and back are all referenced to the left, right, up, down, front, and back of the patient in the sitting posture, and Figure 1 the coordinate system in

[0069] AsFigure 11 and Figure 12 As shown in Figure 11 and Figure 12 , the traveling mechanism 3 in this embodiment includes at least two front universal wheels 31 symmetrically installed at the front end of the chassis 1, a "∫"-shaped connecting frame 32, a power conversion assembly 33, a rear universal wheel 34, and a power wheel 35. Specifically, the "∫"-shaped connecting frame 32 is symmetrically and fixedly installed on both sides of the rear end of the chassis 1, and the upper end of the "∫"-shaped connecting frame 32 extends toward the rear side of the chassis 1. The power conversion assembly 33 is installed on the "∫"-shaped connecting frame 32. The rear universal wheel 34 and the power wheel 35 are both installed on the power conversion assembly 33, and the rear universal wheel 34 and the power wheel 35 do not contact the ground simultaneously. It should be noted in detail that the power conversion assembly 33 in this embodiment includes a conversion stepped cross beam 331 rotatably installed on the chassis 1, a fine-tuning connecting frame 332, a fine-tuning long hole 333, and a power conversion push rod 334. Among them, the fine-tuning connecting frame 332 is fixedly installed on the conversion stepped cross beam 331. The fine-tuning long hole 333 is opened in the fine-tuning connecting frame 332 in the vertical direction. The fixed end of the power conversion push rod 334 is rotatably connected to the "∫"-shaped connecting frame 32, and the telescopic end of the power conversion push rod 334 is slidably arranged in the fine-tuning long hole 333 through a pin shaft. The power wheel 35 is installed at the front end of the conversion stepped cross beam 331, and the rear universal wheel 34 is installed at the rear end of the conversion stepped cross beam 331.

[0070] The conversion stepped cross beam 331 in this embodiment includes a front low stepped portion 3311 and a rear high stepped portion 3312. During installation, the rear universal wheel 34 is installed on the rear high stepped portion 3312, and the power wheel 35 is installed on the front low stepped portion 3311. At the same time, the rotational connection between the conversion stepped cross beam 331 and the chassis 1 is located on the rear high stepped portion 3312. This embodiment cleverly adopts the conversion stepped cross beam 331, the "∫"-shaped connecting frame 32, the power conversion push rod 334, the fine-tuning connecting frame 332, and the connection relationships of various components, so that when the power conversion push rod 334 is in the retracted state, the rear universal wheel 34 contacts the ground, and when the power conversion push rod 334 is in the extended state, the power wheel 35 contacts the ground, realizing the interference-free switching between the power wheel 35 and the rear universal wheel 34, and ensuring that the power wheel 35 and the rear universal wheel 34 do not touch the ground simultaneously.

[0071] It should be further noted that, in order to maintain the stability of the wheelchair in various postures, anti-tipping components 36 are installed on both "∫"-shaped connecting frames 32. As a preferred implementation manner, the anti-tipping component 36 includes an anti-tipping frame 361 fixedly installed behind the "∫"-shaped connecting frame 32 and an anti-tipping wheel 362 installed on the anti-tipping frame 361. The anti-tipping wheel 362 always contacts the ground to provide stable support for the wheelchair.

[0072] The posture transformation device 7 in this embodiment includes a back transformation mechanism 71 for back transformation, a leg transformation mechanism 72 for leg transformation, and a foot-leg linkage component 73 that changes following the leg transformation mechanism 72.

[0073] As Figure 1 and Figure 6 shown, the back transformation mechanism 71 in this embodiment includes: a back transformation push rod 711 and a back air spring 712 respectively installed on two of the "∫"-shaped connecting frames 32; the fixed end of the back transformation push rod 711 is rotatably installed on the corresponding "∫"-shaped connecting frame 32, and the telescopic end of the back transformation push rod 711 is rotatably connected to the upper part of the "]"-shaped bracket 81 on the same side; both ends of the back air spring 712 are installed on the corresponding "]"-shaped bracket 81 and the "∫"-shaped connecting frame 32 on the same side. The back air spring 712 makes an extension / compression movement following the telescopic movement of the back transformation push rod 711. To ensure that the angle of back transformation is sufficient, one end of the back transformation push rod 711 in this embodiment is rotatably installed at the upper end of the "]"-shaped bracket 81 through a connecting piece.

[0074] The leg transformation mechanism 72 includes a support frame 721 fixedly installed at the front end of the base, a second bracket 722 fixedly installed on the support frame 721, a lower shaft frame 723 rotatably installed on the second bracket 722, a lower limit block 724 fixedly arranged on the second bracket 722, a leg transformation plate 725 fixedly installed below the leg mechanism 5, and a leg transformation push rod 726 rotatably installed on the lower shaft frame 723. The telescopic end of the leg transformation push rod 726 is rotatably connected to the leg transformation plate 725.

[0075] To prevent excessive rotation between the leg transfer mechanism 5 and the hip bracket 21, a lower limit block 724 for limiting the extension action of the leg transformation push rod 723 is provided on the lower end surface of the second bracket 721; when the lower shaft frame 722 fits against the lower limit block 724, the lower shaft frame 722 stops rotating downward. At the same time, a limit boss 728 for limiting the contraction action of the leg transformation push rod 723 is provided on the lower shaft frame 722. When the limit boss 728 on the lower shaft frame 722 fits against the mating surface of the second bracket 721, the lower shaft frame 722 and the second bracket 721 stop rotating. The use of the lower limit block 724 and the limit boss 728 ensures that the rotatably arranged leg transformation push rod 723 will not extend or contract excessively, ensuring the stability of leg transformation.

[0076] As Figure 6As shown, the foot-leg linkage assembly 73 in this embodiment includes an L-shaped connecting rod 731 fixedly mounted on the foot mechanism 6 and an S-shaped connecting rod 732 rotatably connected to the L-shaped connecting rod 731, and one end of the S-shaped connecting rod 732 away from the L-shaped connecting rod 731 is rotatably mounted to the leg mechanism 5 through a connecting piece.

[0077] When the transfer wheelchair is converted from a sitting posture to a lying posture, the back conversion push rod 711 and the leg conversion push rod 726 are activated to make the back conversion push rod 711 and the leg conversion push rod 726 extend. Under the action of the back conversion push rod 711 and the back gas spring 712, the back realizes the relative angle change between the back mechanism 4 and the hip mechanism 2 until the angle between the two is 180 degrees. The leg conversion push rod 726 extends, driving the leg mechanism 5 to rotate relative to the hip mechanism 2. At this time, the foot mechanism 6 realizes the relative rotation between the foot mechanism 6 and the leg mechanism 5 under the action of the foot-leg linkage assembly 73. When the angle between the leg mechanism 5 and the hip mechanism 2 is 180 degrees, the angle between the foot mechanism 6 and the leg mechanism 5 is also 180 degrees. The transfer wheelchair is converted from a sitting posture to a lying posture.

[0078] When the transfer wheelchair is converted from a lying position to a sitting position, the back conversion push rod 711 and the leg conversion push rod 726 are activated so that the back conversion push rod 711 and the leg conversion push rod 726 perform a recovery movement, thereby converting the transfer wheelchair from a lying position to a sitting position.

[0079] See also Figure 7 and Figure 8 The leg mechanism 5 in this embodiment includes: a leg bracket 51 rotatably connected to the hip mechanism 2, a leg driving mechanism 52 installed at the lower end of the leg bracket 51, a leg active roller 53 and a leg driven roller 54, and a leg anti-jamming device 56. Specifically, the leg active roller 53 is transmission-connected to the leg driving mechanism 52 through a fifth transmission assembly 57, and the leg active roller 53 and the leg driven roller 54 are transmission-connected through a leg transfer annular belt 55, and the leg anti-jamming device 56 is arranged in the annular cavity of the leg transfer annular belt 55; the leg conversion is connected to both ends of the leg bracket 51.

[0080] The leg anti-stuck belt device 56 includes two leg anti-stuck rollers 561 arranged on both sides of the back support, a leg anti-stuck annular belt 562 wound on the two leg anti-stuck rollers 561, a plurality of fifth transmission teeth 563 arranged on the inner side surface of the back annular transfer belt along the Z-axis direction, and a plurality of sixth transmission teeth 564 arranged on the outer side surface of the leg anti-stuck annular belt 562 and transmitting with the fifth transmission teeth 563; the back support is arranged in the annular cavity of the first anti-stuck annular belt, and the back support, the leg anti-stuck annular belt 562, and the leg transfer annular belt 55 form a three-layer covering structure from the inside to the outside.

[0081] When the leg circular conveyor belt rotates on the leg active roller 53 and the leg driven roller 54, a first anti-stuck device is arranged in the annular cavity of the leg circular operating belt, and the leg bracket 51 is arranged in the annular cavity of the leg anti-stuck circular belt 562, and the three form a three-layer covering structure. Through the cooperation of the fifth transmission tooth 563 and the sixth transmission tooth 564, the leg anti-stuck device 56 without a power source passively rotates with the leg circular conveyor belt, and the point contact between the conveyor belt and the bracket under the action of human body gravity is changed to surface contact, thereby avoiding the jamming problem caused by the large friction force caused by the direct contact between the conveyor belt and the bracket under the action of human body gravity.

[0082] like Figure 9 and Figure 10 As shown, the hip mechanism 2 in this embodiment includes a hip frame 21 mounted on the base frame 1, a hip driving mechanism 22 mounted on the hip frame 21, a first hip transfer assembly 24 connected to the output end of the hip driving mechanism 22 via a first transmission assembly 23, and a second hip transfer assembly 26 connected to the first hip transfer assembly 24 via a second transmission assembly 25. A toilet cavity 27 for patients to use the toilet is provided between the first hip transfer assembly 24 and the second hip transfer assembly 26. When in use, the toilet cavity 27 is docked with the toilet; a barrier swing device 28 for blocking the toilet cavity 27 is installed on the base frame 1; the barrier swing device is not connected to the upper end of the hip frame 21, and is rotatably connected to the lower end of the hip frame 21.

[0083] In the present embodiment, the buttocks mechanism 2 is assembled in the form of a first buttocks transfer component 24 and a second buttocks transfer component 26, and the first transmission component 23 and the second transmission component 25 are used to realize the effect that one buttocks driving mechanism 22 drives the two buttocks transfer components to rotate synchronously. At the same time, a toilet cavity 27 for the patient to use the toilet is reserved between the first buttocks transfer component 24 and the second buttocks transfer component 26. When the patient needs to be transferred, it is only necessary to rotate the barrier swing device relative to the buttocks frame 21 until the barrier swing device is flush with the first buttocks transfer component 24 and the second buttocks transfer component 26, and then start the buttocks driving mechanism 22. When the patient needs to use the toilet, it is only necessary to rotate the barrier swing device downward relative to the buttocks frame 21 so that the toilet cavity 27 is connected to the toilet. The buttocks mechanism 2 of the present invention can realize the transfer of the patient to the left and right sides while realizing the patient's toileting action in a sitting or lying position. It has a compact structure and is simple to implement.

[0084] like Figure 6As shown in the figure, the partition swinging device in the first embodiment includes: a first bracket 281, a first swinging bracket 282, and a partition swinging push rod 283. The first bracket 281 is fixedly installed on the support frame 721, the first swinging bracket 282 is rotatably installed on the first bracket 281, one end of the partition swinging push rod 283 is rotatably installed on the first bracket 281, and a partition assembly 284 is rotatably installed at the other end of the partition swinging push rod 283; the lower end of the partition assembly 284 is rotatably connected to the hip frame 21. The lower end of the partition assembly is rotatably connected to the hip frame 21, and the upper end is in a suspended state, so that when docking with the toilet, the toilet enters from the rear of the wheelchair under the hip mechanism 2, adapting to the actual habit of placing the toilet against the wall.

[0085] Specifically, the partition assembly 284 includes: a seat plate swinging frame 2841 rotatably installed on the hip frame 21, at least two passive rotating rollers 2842, a passive conveyor belt 2843, and a swinging support plate 2844. In this embodiment, there are two passive rotating rollers 2842, and the two passive rotating rollers 2842 are arranged on the seat plate swinging frame 2841 along the Y-axis direction. The passive conveyor belt 2843 is sleeved on the passive rotating rollers 2842. The swinging support plate 2844 is fixedly installed on the lower end surface of the seat plate swinging frame 2841, and a gap for the passive conveyor belt 2843 to pass through is provided between the swinging support plate 2844 and the seat plate swinging frame 2841.

[0086] When performing a transfer movement, the partition swinging push rod 283 is in an extended state, so that the partition assembly 284 fills the inside of the toilet cavity. The passive conveyor belt 2843 in the partition assembly 284 is flush with the hip transfer endless belt 245 in the first hip transfer assembly 24 and the second hip transfer assembly 26 on the horizontal plane. When performing a side movement, the partition swinging push rod 283 is in a retracted state. The partition swinging push rod 283 pulls the partition assembly 284 to rotate downward relative to the lower end of the hip frame 21 until the partition assembly 284 completely rotates out of the space corresponding to the toilet cavity. The setting of the partition device can satisfy the rotation of the human body during the transfer movement and facilitate the toilet use of the patient. And by rotating the partition assembly 284 forward and pulling it apart, it is convenient for the transfer chair to enter the toilet from the rear. The design is reasonable and the structure is simple. At the same time, the wheelchair in this embodiment also includes a control module and a battery, and the control module and the battery are respectively installed on the left and right sides of the chassis 1, avoiding interference with the toilet use caused by the installation of the control module box and the battery.

[0087] It should be further noted that the lower part of the partition swing push rod 283 in this embodiment is rotationally installed on the first bracket 281 through the first swing bracket 282, and the first bracket 281 is installed on the support frame 721, so that the partition swing push rod 283 has a relatively small fine-tuning displacement when converting the rotation movement and the toilet use movement, and there is a certain buffer space for the recovery of the partition swing push rod 283 during the conversion of the rotation movement and the toilet use movement, and the action conversion is relatively gentle, giving the patient time to adapt.

[0088] Both the first hip transfer assembly 24 and the second hip transfer assembly 26 include: a first hip transfer roller 241 and a second hip transfer roller 242 symmetrically arranged on the hip frame 21 along the Y-axis direction, at least two first belt drive gears 243 arranged at both ends of the first hip transfer roller 241, at least two second belt drive gears 244 arranged at both ends of the second hip transfer roller 242, a hip transfer endless belt 245, and a hip anti-jamming belt device 246. Among them, the first belt drive gear 243 is coaxially arranged with the first hip transfer roller 241, the second belt drive gear 244 is coaxially arranged with the second hip transfer roller 242, the hip transfer endless belt 245 is driven between the first hip transfer roller 241 and the second hip transfer roller 242 through the first belt drive gear 243 and the second belt drive gear 244, and the hip anti-jamming belt device 246 is arranged in the annular cavity of the hip transfer endless belt 245.

[0089] The hip anti-jamming belt device 246 includes: a hip support member, two second anti-jamming rollers, a hip anti-jamming endless belt, a plurality of third drive teeth, and a plurality of fourth drive teeth. Specifically, the two second anti-jamming rollers are rotationally installed on the left and right sides of the leg support member, the hip anti-jamming endless belt is wound between the two second anti-jamming rollers, a plurality of third drive teeth are arranged on the inner side surface of the hip transfer belt along the Y-axis direction, and fourth drive teeth are arranged on the outer side surface of the second anti-jamming belt and are in mating connection with the third drive teeth.

[0090] In this first embodiment, the hip anti-jamming belt device 246 is provided in both the first hip transfer assembly 24 and the second hip transfer assembly 26. The hip anti-jamming belt device 246 is arranged in the annular cavity of the hip annular transfer belt and covers the outside of the hip support member. Through the cooperation of the third drive teeth and the fourth drive teeth, the hip anti-jamming belt device 246 without a power source rotates passively following the hip annular transfer belt. At the same time, corresponding anti-jamming belt devices are also provided in the back mechanism 4 and the leg mechanism 5, avoiding the problem of belt jamming caused by the direct contact between the transfer belt and the support member under the action of human body gravity due to large friction.

[0091] In this embodiment, the hip drive mechanism 22 includes a first drive mounting bracket 521 installed at the lower end of the hip bracket 21, a hip transfer motor 522 installed on the first drive mounting bracket 521. The hip transfer motor 522 is in transmission connection with the first transmission assembly 23. Both the first transmission assembly 23 and the second transmission assembly 25 adopt belt transmission assemblies.

[0092] The back mechanism 4 in this embodiment includes: a back bracket, a back drive mechanism installed at the upper end of the back bracket, a back driving roller and a back driven roller installed on both sides of the back bracket, and at least one back anti - jamming belt device. Among them, the back driving roller is in transmission connection with the output end of the back drive mechanism through a back transmission mechanism; the back driven roller is in transmission connection with the back driving roller through a back annular transfer belt.

[0093] The back anti - jamming belt device is arranged in the annular cavity of the back annular transfer belt. The back anti - jamming belt device includes two back anti - jamming rollers arranged on both sides of the back bracket and a back anti - jamming annular belt wound around the two back anti - jamming rollers. A number of first transmission teeth are arranged on the inner side surface of the back annular transfer belt along the Z - axis direction; a number of second transmission teeth that are in transmission cooperation with the first transmission teeth are arranged on the outer side surface of the back anti - jamming annular belt. The back bracket is arranged in the annular cavity of the back anti - jamming annular belt. This embodiment takes Figure 2 the marked coordinate system as the reference coordinate.

[0094] The back mechanism 4 of this embodiment uses the back driving roller, the back driven roller and the back annular transfer belt to realize the left - right transfer of the human body. A back anti - jamming belt device is arranged on the back mechanism 4 where the force is the greatest when the human body lies flat. The anti - jamming belt device is arranged in the annular cavity of the back annular transfer belt and covers the outside of the back bracket. Through the cooperation of the first transmission teeth and the second transmission teeth, the back anti - jamming belt device without a power source rotates passively following the back annular transfer belt, fundamentally avoiding the problem of belt jamming caused by large friction when the transfer belt directly contacts the bracket under the action of human gravity. The back annular transfer belt of this embodiment does not directly contact the back bracket, and uses the passive rotation of the back anti - jamming belt device to completely solve the problem of large friction between the transfer belt and the bracket, completely avoiding the belt jamming phenomenon during the transfer process, and ensuring the stability and efficiency of the transfer.

[0095] Such as Figure 3As shown in the figure, the back driving mechanism in this embodiment includes a first mounting bracket installed at the end of the back bracket, a back transfer motor installed on the first mounting bracket, a back driving gear coaxially arranged with the output shaft of the back transfer motor, and a back driven gear meshed and connected with the back driving gear. The back transmission mechanism includes a first back transmission pulley installed at the upper end of the back bracket and a second back transmission pulley coaxially arranged with the upper end of the back driving roller; the first back transmission pulley is coaxially arranged with the back driven gear, and the first back transmission pulley and the second back transmission pulley are connected by a first back transmission belt. When in use, start the back transfer motor to drive the back driving gear to rotate, and then drive the back driven gear, the first back transmission pulley, and the second back transmission pulley to rotate. The second back transmission pulley drives the back driving roller to rotate, and under the action of the back annular transfer belt, drives the rotation of the back driven roller, thereby realizing the transfer of the patient's back.

[0096] To achieve the transfer stability of the back annular transfer belt, at least two back toothed pulleys are provided on both the back driving roller and the back driven roller in this embodiment. The back toothed pulleys are in transmission cooperation with the first transmission teeth on the outer side of the back annular transfer belt to prevent the back annular transfer belt from slipping during rotation.

[0097] As Figure 7 and Figure 8 As shown in the figure, the leg mechanism 5 in this embodiment includes a leg bracket 51 rotatably connected to the hip bracket 21, a leg driving mechanism 52, a leg driving roller 53, a leg driven roller 54, and a leg anti-jamming belt device 56. Specifically, the leg driving mechanism 52 is installed at the lower end of the leg bracket 51. The leg driving roller 53 is in transmission connection with the leg driving mechanism 52 through a leg transmission component, and the leg driving roller 53 and the leg driven roller 54 are connected by a leg transfer annular belt 55. The leg anti-jamming belt device 56 is arranged in the annular cavity of the leg transfer annular belt 55.

[0098] The leg driving mechanism 52 is installed at the lower end of the leg bracket 51. The leg driving mechanism 52 has the same structure as the back driving mechanism, and its specific structure will not be elaborated here in detail. The structure and working principle of the leg anti-jamming belt device 56 are the same as those of the first anti-jamming belt device, and will not be elaborated here either. It should be understood that those skilled in the art should be able to adaptively install the leg driving mechanism 52 and the four-way anti-jamming belt device according to specific requirements. The present invention also provides corresponding anti-jamming belt devices in the hip mechanism 2 and the leg mechanism 5 to assist the back mechanism 4 in transporting the human body more stably.

[0099] As Figure 6As shown, the foot mechanism 6 in this embodiment includes a foot bracket rotatably connected to the leg mechanism 5 and a foot pedal arranged on the foot bracket. It should be further explained that, considering that the force on the foot is very small when the human body is lying flat, the foot mechanism 6 in this embodiment does not have a transfer function, and when the wheelchair function is performed, the stability of the patient's feet is guaranteed.

[0100] It should be further explained that the outer layers of the back mechanism 4, the hip mechanism 2 and the leg mechanism 5 in this embodiment are all adhered with sponges, which on the one hand can divide the weight of the patient, and on the other hand can improve the comfort of the patient.

[0101] The control method based on the above wheelchair bed includes the following contents:

[0102] When the user needs to move to a sitting or lying position, the armrest 84 is in an unfolded state, the armrest 84 and the “]”-shaped bracket 81 are perpendicular to each other, and the upper end surface of the “┘”-shaped limit stopper 85 abuts against the lower end surface of the limit protrusion 86 for limiting position.

[0103] When the wheelchair bed needs to be transferred and docked, the armrest 84 is manually rotated 90 degrees clockwise, and the rotated armrest 84 is pushed toward the inside of the wheelchair bed until the "┘"-shaped limit block 85 abuts against the connecting block 82; the posture conversion device 7 is started to convert the wheelchair bed from a sitting posture to a lying posture; the walking mechanism 3 is adjusted to an unpowered state; in the unpowered state, the rear universal wheel 34 is in contact with the ground.

[0104] When in use, first select the wheelchair running mode, then select the operation mode, and finally start the operation according to the operation mode. In this embodiment, the wheelchair running mode includes a non-powered mode and a power-assisted mode. When the wheelchair running mode is in the non-powered mode, the power conversion push rod 334 is in a retracted state, and the rear universal wheel 34 is in contact with the ground; when the wheelchair running mode is in the power-assisted mode, the power conversion push rod 334 is in an extended state, and the power wheel 35 is in contact with the ground. The operation modes include toilet mode, sitting posture mode, sitting posture power-assisted mode, lying posture mode, lying posture power-assisted mode, and transfer mode. If in the toilet mode, transfer mode, sitting posture mode, and sitting posture mode, the wheelchair running mode is a non-powered mode; if turning in situ, the wheelchair running mode is a non-powered mode.

[0105] It should be understood that the specific embodiments described above are only used to explain the present invention, and are not used to limit the present invention. Obvious changes or modifications derived from the spirit of the present invention are still within the protection scope of the present invention.

Claims

1. A wheelchair bed convenient for transfer and docking, characterized in that, Including: A chassis, a hip mechanism horizontally installed above the chassis, a traveling mechanism installed below the chassis, a back mechanism and a leg mechanism rotatably connected to the hip mechanism, a foot mechanism rotatably connected to the leg mechanism, a posture transformation device for the wheelchair bed to perform multi-posture transformation, and armrest mechanisms symmetrically installed on both sides of the back mechanism; The armrest mechanism includes a "]”-shaped bracket fixedly installed behind the back mechanism, a connecting block installed on the "]”-shaped bracket, an armrest tube shaft slidably installed on the connecting block in the X-axis direction, an armrest fixedly installed at the outer end of the armrest tube shaft, a "┘”-shaped limit stop fixedly installed on the armrest, and a limit convex block fixedly installed on the "]”-shaped bracket; the armrest follows the armrest tube shaft to slide in the X-axis direction and / or rotate around the X-axis axis; When the armrest is in the unfolded state, the "┘”-shaped limit stop and the limit convex block perform upper and lower surface limits; when the armrest is in the retracted state, the "┘”-shaped limit stop and the connecting block perform left and right surface limits, and the armrest is retracted into the cavity between the "]”-shaped bracket and the back mechanism.

2. The wheelchair bed for facilitating transfer and docking according to claim 1, wherein: The traveling mechanism includes: At least two front universal wheels symmetrically installed at the front end of the chassis; A "∫”-shaped connecting frame symmetrically and fixedly installed on both sides of the rear end of the chassis, and the upper end of the "∫”-shaped connecting frame extends towards the rear side of the chassis; A power conversion assembly installed on the "∫”-shaped connecting frame; A rear universal wheel and a power wheel, both installed on the power conversion assembly, and the rear universal wheel and the power wheel do not contact the ground simultaneously.

3. The wheelchair bed for facilitating transfer and docking according to claim 2, wherein The power conversion assembly includes: A conversion stepped crossbeam rotatably installed on the chassis; A fine-tuning connecting frame fixedly installed on the conversion stepped crossbeam; A fine-tuning long hole opened in the fine-tuning connecting frame in the vertical direction; A power conversion push rod, the fixed end of the power conversion push rod is rotatably connected to the "∫”-shaped connecting frame, and the telescopic end of the power conversion push rod is slidably arranged in the fine-tuning long hole through a pin shaft; The power wheel is installed at the front end of the conversion stepped crossbeam, and the rear universal wheel is installed at the rear end of the conversion stepped crossbeam.

4. The wheelchair bed convenient for transfer and docking according to claim 3, wherein: The conversion stepped crossbeam includes a front low stepped portion and a rear high stepped portion, the rear universal wheel is installed on the rear high stepped portion, the power wheel is installed on the front low stepped portion, and at the same time, the rotation connection between the conversion stepped crossbeam and the chassis is located on the rear high stepped portion.

5. The wheelchair bed for facilitating transfer and docking according to claim 2, characterized in that: The traveling mechanism further includes an anti-tipping component, and the anti-tipping component includes an anti-tipping frame fixedly installed behind the "∫”-shaped connecting frame and an anti-tipping wheel installed on the anti-tipping frame; During use, the front universal wheels and the anti-tipping wheels are always in contact with the ground.

6. The wheelchair bed for facilitating transfer and docking according to claim 2, wherein: The posture transformation device includes a back transformation mechanism for back transformation, a leg transformation mechanism for leg transformation, and a foot-leg linkage component that changes following the leg transformation mechanism; The back transformation mechanism includes: a back transformation push rod and a back air spring respectively installed on the two "∫”-shaped connecting frames; The fixed end of the back conversion push rod is rotatably mounted on the corresponding "∫"-shaped connecting frame, and the telescopic end of the back conversion push rod is rotatably connected to the upper part of the "]"-shaped bracket on the same side; The two ends of the back gas spring are respectively mounted on the corresponding "]"-shaped bracket and the "∫"-shaped connecting frame on the same side.

7. The wheelchair bed for convenient transfer and docking according to claim 6, characterized in that: The leg transformation mechanism comprises: A support frame fixedly mounted on the front end of the base; A second bracket, fixedly mounted on the support frame; A lower shaft bracket, rotatably mounted on the second bracket; A lower limit block, fixedly disposed on the second bracket, for limiting the rotation of the lower shaft bracket relative to the second bracket; A leg transformation plate, fixedly mounted below the leg mechanism; And a leg conversion push rod rotatably mounted on the lower shaft frame, the fixed end of the leg conversion push rod is rotatably connected to the lower shaft frame, and the extension and retraction end of the leg conversion push rod is rotatably connected to the leg conversion plate.

8. The wheelchair bed convenient for transfer and docking according to claim 7, characterized in that, The foot-leg linkage assembly comprises: An L-shaped connecting rod with one end fixedly mounted on the foot mechanism; An S-shaped connecting rod, rotatably connected to the other end of the L-shaped connecting rod; One end of the S-shaped connecting rod away from the L-shaped connecting rod is rotatably mounted on the leg mechanism through a connecting piece.

9. The wheelchair bed convenient for transfer docking according to claim 7, characterized in that, The leg mechanism comprises: a leg support rotatably connected to the hip mechanism; A leg driving mechanism, mounted on the lower end of the leg support; The leg driving roller and the leg driven roller; the leg driving roller is connected to the leg driving mechanism through the fifth transmission assembly, and the leg driving roller and the leg driven roller are connected through the leg transfer ring belt; The leg anti-stuck device is arranged in the annular cavity of the leg transfer annular belt; the leg conversion is connected to the two ends of the leg bracket.

10. The wheelchair bed convenient for transfer and docking according to claim 9, wherein, The leg anti-stuck belt device includes two leg anti-stuck rollers arranged on both sides of the back support, a leg anti-stuck annular belt wound on the two leg anti-stuck rollers, a plurality of fifth transmission teeth arranged on the inner side of the back endless conveyor belt along the Z-axis direction, and a plurality of sixth transmission teeth arranged on the outer side of the leg anti-stuck annular belt and matched with the fifth transmission teeth; The back support is arranged in the annular cavity of the first anti-stuck annular belt, and the back support, the leg anti-stuck annular belt and the leg transfer annular belt form a three-layer covering structure from the inside to the outside.

11. A control method for a wheelchair bed facilitating transfer and docking according to any one of claims 2-10, characterized in that, Includes the following: When the sitting posture or lying posture is required, the armrest is in an unfolded state, the armrest and the "]"-shaped bracket are perpendicular to each other, and the upper end surface of the "┘"-shaped limit stopper abuts against the lower end surface of the limit protrusion to limit the position; When the wheelchair bed needs to be transferred and docked, the armrest is manually rotated 90 degrees in the clockwise direction, and the rotated armrest is pushed toward the inside of the wheelchair bed until the "┘"-shaped limit stopper abuts against the connecting block; The posture changing device is started to convert the wheelchair bed from a sitting posture to a lying posture; the walking mechanism is adjusted to an unpowered state; in the unpowered state, the rear universal wheel is in contact with the ground.

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