CN111529231A

CN111529231A - Wheelchair bed

Info

Publication number: CN111529231A
Application number: CN202010371790.XA
Authority: CN
Inventors: 陈宇; 赵锡晋; 龙观富
Original assignee: Guangdong Bofang Zhongji Medical Technology Co ltd
Current assignee: Guangdong Bofang Zhongji Medical Technology Co ltd
Priority date: 2020-05-06
Filing date: 2020-05-06
Publication date: 2020-08-14

Abstract

The invention discloses a wheelchair bed, comprising: base member, chair body, link mechanism and angle adjustment mechanism. The basal body is provided with a traveling wheel. The chair body is arranged on the base body and comprises a plurality of supports, and the angle between every two adjacent supports is adjustable. The connecting rod mechanism is arranged on the base body and connected with the at least two supports, and the angle between the at least two supports is changed when the connecting rod mechanism acts. Angle adjustment mechanism establishes on the base member and links to each other with link mechanism, and angle adjustment mechanism includes: hand portion, switching-over subassembly and regulation pole, hand portion is located one side of base member, adjusts the pole and connects link mechanism, and the switching-over subassembly is connected between hand portion and regulation pole, and the one end that the switching-over subassembly drove the regulation pole when shaking hand portion removes to drive two at least support actions through link mechanism. According to the wheelchair bed provided by the embodiment of the invention, the safety of the wheelchair bed can be improved, and the cost is reduced.

Description

Wheelchair bed

Technical Field

The invention belongs to the technical field of nursing equipment, and particularly relates to a wheelchair bed.

Background

In general wheelchair beds, the angle adjustment or deformation of the wheelchair bed is mostly realized by adopting an electric push, but the wheelchair bed needs to be carried with a battery or can be realized only in a place with a socket at a fixed point. The battery carried by the wheelchair not only increases the cost of the wheelchair, but also increases the self weight of the wheelchair, and has potential safety hazards such as battery leakage and the like; the latter is too limited and more limited for weak or disabled persons with outdoor demands.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a wheelchair bed to improve the safety of the wheelchair bed and reduce the cost.

According to the wheelchair bed of the embodiment of the invention, comprising: the base body is provided with traveling wheels; the chair body is arranged on the base body and comprises a plurality of supports, and the angle between every two adjacent supports is adjustable; the connecting rod mechanism is arranged on the base body and connected with the at least two brackets, and the connecting rod mechanism drives the angle between the at least two brackets to change when acting; angle adjustment mechanism, angle adjustment mechanism establishes on the base member and with link mechanism links to each other, angle adjustment mechanism includes: hand portion, switching-over subassembly and regulation pole, hand portion is located one side of base member, it connects to adjust the pole link mechanism, the switching-over subassembly is connected hand portion with between the regulation pole, wave during hand portion the switching-over subassembly drives the one end of adjusting the pole removes, with pass through link mechanism drives at least two the support action.

According to the wheelchair bed provided by the embodiment of the invention, the arrangement of the angle adjusting structure is compact, the occupied space is reduced, the hand-operated part is arranged on the side surface of the base body, the operation of patients is facilitated, the wheelchair bed is a manual adjusting device, the cost of the wheelchair bed is greatly reduced, the wheelchair bed is lighter, and the angle adjusting safety of the wheelchair bed is improved. Therefore, the hand-cranking part is shaken, the reversing assembly drives one end of the adjusting rod to move, so that at least two supports are driven to act through the connecting rod mechanism, and the angle of the wheelchair bed can be stably adjusted. The hand-operated power can complete the transmission of motion and power, is convenient and quick, has high reliability, and is convenient for patients or workers to operate.

In some embodiments, the linkage mechanism comprises: and one end of each connecting rod is rotatably connected to the base body, and the other end of each connecting rod is rotatably connected to the support.

Specifically, the plurality of brackets include: the upper body plate and the lower body plate are rotatably connected to two opposite sides of the seat plate; the plurality of connecting rods comprise a first connecting rod and a second connecting rod, the upper end of the first connecting rod is rotatably connected to the seat plate, and the upper end of the adjusting rod is rotatably connected to the first connecting rod; the back of the upper trunk plate is connected with the second connecting rod, and the second connecting rod, the seat plate, the first connecting rod and the base body which are connected with the upper trunk plate form a four-bar mechanism.

Further, the lower trunk plate is rotatably connected to the base, and the lower trunk plate, the seat plate, the first link and the base form a four-bar linkage.

In some optional embodiments, the plurality of brackets further comprises: the connecting rods further comprise third connecting rods, one ends of the third connecting rods are rotatably connected to the supporting legs, and the second connecting rods, the supporting legs, the third connecting rods and the base body form a four-bar mechanism.

In some embodiments, the reversing assembly comprises: the input wheel is connected with the hand-cranking part; an output wheel rotating synchronously with the input wheel; the screw rod is connected to the output wheel; the nut is in threaded fit with the lead screw, and one end of the adjusting rod is connected to the nut.

Specifically, the screw thread matched with the screw rod and the nut is a self-locking screw thread.

In some optional embodiments, the reversing assembly further comprises: the transmission belt is connected between the input wheel and the synchronizing wheel, and the input wheel is meshed with the output wheel.

In some optional embodiments, the angle adjusting mechanism further includes a fixing plate vertically disposed in the base, the reversing assembly is disposed on the fixing plate, the rotating shaft of the hand cranking portion is horizontally disposed, and the lead screw is vertically disposed on the fixing plate.

Specifically, the nut is connected with a sliding block and a roller which are matched on the fixed plate.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic view of a wheelchair bed according to an embodiment of the present invention;

FIG. 2 is a schematic view of a part of the mechanism of the wheelchair bed according to the embodiment of the present invention (including the body, the angle adjustment mechanism and the first link);

FIG. 3 is a schematic structural view of a wheelchair bed according to another embodiment of the present invention;

fig. 4 is a perspective view of an angle adjustment mechanism in an embodiment of the present invention.

Reference numerals:

a wheelchair bed 100,

A base body 1, a traveling wheel 11,

Chair body 2, support 21, seat plate 211, upper body plate 212, support legs 2121, lower body plate 213,

A link mechanism 3, a link 31, a first link 311, a second link 312, a third link 313,

The angle adjusting mechanism 4, the hand-cranking portion 41, the rotating shaft 411, the reversing assembly 42, the input wheel 421, the output wheel 422, the lead screw 423, the nut 424, the transmission belt 425, the synchronizing wheel 426, the transition wheel 427, the input shaft 428, the adjusting rod 43, the pin shaft 431, the fixing plate 44, the first supporting seat 441, the second supporting seat 442, the third supporting seat 443, the fastening piece 444, the sliding block 45 and the roller 46.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "vertical", "horizontal", "inner", "outer", "clockwise", "counterclockwise", "axial", and the like, indicate orientations and positional relationships based on the orientations and positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

A wheelchair bed 100 according to an embodiment of the present invention will be described below with reference to fig. 1 to 4.

The wheelchair bed 100 according to the embodiment of the present invention, as shown in fig. 1 to 4, includes: the chair comprises a base body 1, a chair body 2, a link mechanism 33 and an angle adjusting mechanism 4.

As shown in fig. 1 and 2, the base body 1 is provided with road wheels 11. The base 1 is provided as a base of the wheelchair bed 100, and various parts such as the seat body 2 and the like are mounted on the base 1 to ensure the overall stability. The arrangement of the walking wheels 11 can improve the moving flexibility of the wheelchair bed 100, so as to facilitate the transfer of patients, such as patients needing to go out for movement or come and go to different examination rooms. For the patient with inconvenient movement, the patient leaves the room or ward with the help of the movable wheelchair bed 100, so that the steps of transferring the patient from the sickbed to other auxiliary facilities can be reduced, the labor is saved, the safety of the patient can be improved, and the secondary injury to the patient is reduced.

As shown in fig. 1, the chair body 2 is arranged on the base 1, the chair body 2 includes a plurality of brackets 21, and the angle between every two adjacent brackets 21 is adjustable. The link mechanism 33 is disposed on the base 1 and connected to the at least two brackets 21, and the link mechanism 33 drives the angle between the at least two brackets 21 to change when acting. It should be noted here that the link mechanism 33 can be connected to the two brackets 21, so as to realize the angle change between the two brackets 21, thereby adapting to various requirements of patients. For example, one of the two supports 21 may be the support 21 for supporting the head of the patient, and the other may be the support 21 for supporting the waist of the patient, so that the angle between the two supports 21 is changed by the operation of the link mechanism 33, so that the head of the patient needs to be higher than a part of the body to achieve a good neck protection effect, or a more proper waist support angle can be provided for the patient. For another example, one of the two supports 21 may be a support 21 for supporting the buttocks of the patient, and the other may be a support 21 for supporting the feet of the patient, so that the angle between the two supports 21 is changed by the operation of the link mechanism 33, and the requirements that the legs of the patient need to be lifted and the like are met.

As shown in fig. 1, the link mechanism 33 may also be connected to the plurality of supports 21, and the link mechanism 33 drives the angle change between the plurality of supports 21 when acting, so that the bed form and the chair form may be integrally set, the structure is reasonable, the stability is good, and it is convenient to meet the multiple requirements of the patient, for example, the patient may select the lying, sitting and different inclination angles, and the space may be saved by conveniently switching the wheelchair bed 100 between the bed form and the chair form, for example, in the process of storage and transportation, the wheelchair bed 100 may be switched from the bed form to the chair form, so as to reduce the occupied space of the wheelchair bed 100, thereby reducing the cost of transportation and storage. In addition, the comfort and safety of the patient can be improved, for example, for the patient with inconvenient movement, the patient needs to be assisted by an external facility when leaving the room or ward, at this time, the patient can select to lie on the wheelchair bed 100 in the bed form to transfer the position, and the wheelchair bed 100 can be switched to the chair form by changing the angles of the plurality of brackets 21.

As shown in fig. 1 and 4, the angle adjusting mechanism 4 is provided on the base 1 and connected to the link mechanism 33, and the angle adjusting mechanism 4 includes: hand portion 41, switching-over subassembly 42 and regulation pole 43, hand portion 41 is located one side of base member 1, and regulation pole 43 connects link mechanism 33, and switching-over subassembly 42 is connected between hand portion 41 and regulation pole 43, and switching-over subassembly 42 drives the one end of adjusting pole 43 and removes when rocking hand portion 41 to drive at least two supports 21 actions through link mechanism 33. It can be understood that the reversing assembly 42 is arranged to make the layout of the angle adjusting mechanism 4 compact, and effectively reduce the occupied space of the angle adjusting mechanism 4. The setting of hand portion 41 for wheelchair bed 100 is manual adjusting device, greatly reduced wheelchair bed 100's cost, and be favorable to wheelchair bed 100's regulation, makes wheelchair bed 100 lightweight more, improves the security of wheelchair bed 100 angle modulation, and in addition, hand portion 41 sets up in the side of base member 1, the operation of the disease of also being convenient for.

Therefore, the hand-cranking portion 41 is shaken, the reversing assembly 42 drives one end of the adjusting rod 43 to move, so as to drive the at least two brackets 21 to act through the link mechanism 33, and thus the stable adjustment of the angle of the wheelchair bed 100 can be realized. Therefore, the transmission of the motion and the power can be completed by one hand-cranking power, and the device is convenient, quick, high in reliability and convenient for patients or workers to use.

The angle adjusting mechanism 4 outputs power through the adjusting rod 43, then the adjusting rod 43 drives the link mechanism 3 to act, and finally the link mechanism 3 drives the at least two brackets 21 to act. With the arrangement, the movement of the adjusting rod 43 has less restriction on the link mechanism 3, a plurality of changing spaces are provided for the shape of the link mechanism 3, the simple link mechanism 3 can be connected with two brackets 31, the complex link mechanism 3 can be connected with more brackets 31, and the design space is very large.

According to the wheelchair bed 100 provided by the embodiment of the invention, through the arrangement of the reversing assembly 42, the layout of the angle adjusting structure can be compact, the occupied space is reduced, the hand-cranking portion 41 is arranged on the side surface of the base body 1, the operation of a patient is facilitated, the wheelchair bed 100 can be a manual adjusting device, the cost of the wheelchair bed 100 is greatly reduced, the wheelchair bed 100 is lighter, and the angle adjusting safety of the wheelchair bed 100 is improved. Therefore, the hand-cranking portion 41 is shaken, the reversing assembly 42 drives one end of the adjusting rod 43 to move, so as to drive the at least two brackets 21 to act through the link mechanism 33, and thus the stable adjustment of the angle of the wheelchair bed 100 can be realized. The hand-operated power can complete the transmission of motion and power, is convenient and quick, has high reliability, and is convenient for patients or workers to operate.

In some embodiments, as shown in fig. 1, the linkage mechanism 33 includes: and a plurality of connecting rods 31, one end of each connecting rod 31 is rotatably connected on the base body 1, and the other end of each connecting rod 31 is rotatably connected on the bracket 21. Each connecting rod 31 is rotatably connected to the base body 1, the whole connecting rod mechanism 3 moves by taking the base body 1 as a direct support, the support foundation is stable, the structural strength of the support part can be guaranteed, and the connecting rod mechanism 33 is not easy to be blocked due to deformation of the support part during action.

Specifically, as shown in fig. 1, the plurality of brackets 21 includes: the seat board 211, the upper torso plate 212 and the lower torso plate 213, wherein the upper torso plate 212 and the lower torso plate 213 are rotatably connected to opposite sides of the seat board 211. Here, the upper torso plate 212 may be used to support the head and the back of the patient, the seat plate 211 may be used to support the buttocks and a portion of the legs of the patient, and the lower torso plate 213 may be used to support the legs of the patient, so that the whole body of the patient may be stably supported, thereby improving the stability and safety of the patient during use.

Of course, the present disclosure is not limited thereto, and the plurality of brackets 21 may also include one of an armrest, a headrest, and a foot plate, and when the angle adjustment mechanism is operated, one of the brackets 21 may also be driven to move.

As shown in fig. 1 and 3, the plurality of links 31 include a first link 311 and a second link 312, an upper end of the first link 311 is rotatably connected to the seat plate 211, an upper end of the adjustment lever 43 is rotatably connected to the first link 311, a lower end of the adjustment lever 43 is movably disposed, and the adjustment lever 43, a lower end connecting portion of the adjustment lever 43, and the first link 311 constitute a crank block structure. It can be understood that the crank block structure has the advantages of low surface contact, small pressure, convenient lubrication, light abrasion, long service life, large transmission power, easy processing, high precision, low cost and the like. Thereby, the transmission effect of the adjustment lever 43 and the first link 311 can be improved.

As shown in fig. 1 and 3, the second link 312 is connected to the rear surface of the upper torso plate 212, and the second link 312 connected to the upper torso plate 212, the seat plate 211, the first link 311, and the base 1 constitute a four-link mechanism. It can be understood that the four-bar linkage is provided to allow the angle adjustment of the upper torso plate 212 with respect to the seat plate 211 to be very simple, reliable, easy to manufacture, and highly accurate.

Further, as shown in fig. 1 and 3, the lower torso plate 213 is pivotally connected to the base 1, and the lower torso plate 213, the seat plate 211, the first link 311, and the base 1 constitute a four-bar linkage. Here, the first link 311 rotates to change the angle between the seat plate 211 and the lower torso plate 213. The transmission of lower torso plate 213, seat plate 211, first link 311 and base 1 adopts four-bar linkage can be used for transmitting great power, easily makes, and manufacturing accuracy is high, is favorable to realizing the angle modulation between lower torso plate 213 and the seat plate 211, and promotes angle modulation accuracy.

In some alternative embodiments, as shown in fig. 1 and 3, the plurality of brackets 21 further includes: a support leg 2121 rotatably connected to the rear surface of the upper torso plate 212, and the plurality of links 31 further include a third link 313, one end of the third link 313 is rotatably connected to the support leg 2121, and the second link 312, the support leg 2121, the third link 313 and the base 1 constitute a four-bar linkage 33. It is understood that the support legs 2121 are provided to support the upper torso plate 212 stably, and thus the base 1 can be miniaturized, for example, the base 1 can be disposed under the seat plate 211, and the support legs 2121 are used to support the upper torso plate 212 when the wheelchair bed 100 is transformed into the bed configuration, so that the upper torso plate 212 can stably support the human body. The occupied space of the wheelchair bed 100 can be further reduced, for example, during the storage and transportation process, the wheelchair bed 100 can be deformed into a chair shape, and the volume of the base body 1 and the chair body 2 is smaller. In addition, the provision of the four-bar linkage makes the angle adjustment of the support legs 2121 with respect to the base 1 very simple, highly reliable, easy to manufacture, and highly accurate.

In some embodiments, as shown in fig. 1 and 4, the reversing assembly 42 includes: input wheel 421, output wheel 422, lead screw 423 and nut 424. The input wheel 421 is connected to the hand-cranking portion 41. The output wheel 422 rotates in synchronism with the input wheel 421. The lead screw 423 is connected to the output wheel 422. A nut 424 is screw-fitted to the screw shaft 423, and one end of the adjustment lever 43 is connected to the nut 424. It can be understood that, when the hand-cranking portion 41 is shaken, the input wheel 421 and the output wheel 422 are rotated together, so that the screw 423 and the nut 424 are sequentially driven to rotate, and the one end of the adjusting rod 43 is driven to rotate. The matching form of the screw 423 and the nut 424 is adopted, the transmission is smooth, the control is convenient, and for example, the rotating direction of the screw 423 and the moving direction of the nut 424 can be changed sequentially by changing the rotating direction of the output wheel 422. In addition, the control precision of the angle adjusting mechanism 4 can be improved, for example, the number of rotation turns of the screw 423 and the moving distance of the control nut 424 can be sequentially controlled by adjusting the number of rotation turns of the output wheel 422, so that the use of patients is facilitated, and when small-amplitude angle adjustment is needed by patients, the number of rotation turns of the input wheel 421 can be reduced, and the short-distance movement of the nut 424 is realized.

Specifically, the threads of the screw 423 and the nut 424 are self-locking threads. This enables automatic locking, e.g. when the screw 423 is rotated, the nut 424 may be moved relative to the base body 1. When the lead screw 423 stops rotating, the self-locking thread can lock the movement of the nut 424, so that the operation reliability and the safety of the angle adjusting device are improved, the safety of angle adjustment of the wheelchair bed 100 can be improved, and hidden dangers such as sudden falling and the like in the angle adjusting process of the wheelchair bed 100 are reduced.

Optionally, the self-locking thread may be a trapezoidal thread, that is, the lead screw 423 is a trapezoidal lead screw, and the self-locking thread may also be other thread types, which is not limited herein.

In some alternative embodiments, as shown in fig. 4, the reversing assembly 42 further comprises: a transmission belt 425 and a synchronous wheel 426, wherein the transmission belt 425 is connected between the input wheel 421 and the synchronous wheel 426, the input wheel 421 is meshed with the output wheel 422, namely, the input wheel 421 and the output wheel 422 are both gears. It can be appreciated that the transmission of the transmission belt 425 and the synchronizing wheel 426 has the advantages of constant transmission ratio, compact structure, high efficiency and the like, so that the reversing assembly 42 can be made to be reasonable in structure, and the transmission efficiency of the reversing assembly 42 can be improved.

Optionally, as shown in fig. 4, the reversing assembly 42 further includes an input shaft 428 and a transition wheel 427. The input shaft 428 is connected between the input wheel 421 and the transition wheel 427, the timing belt is rotatably connected between the synchronizing wheel 426 and the transition wheel 427, and the rotating shaft 411 of the hand crank 41 is connected to the synchronizing wheel 426. It will be appreciated that the arrangement of the transition wheel 427 and the input shaft 428 may improve the smoothness and reliability of the transmission of the reversing assembly 42, and may be varied to save effort or change the number of rocking turns by changing the gear ratio of the synchronizing wheel 426 and the transition wheel 427. Here, by shaking the hand-shaking unit 41, the synchronizing wheel 426 and the transition wheel 427 are sequentially rotated, so that power is input to the input wheel 421.

Of course, in other embodiments, the reversing assembly 42 may also include: an endless chain and a sprocket. The endless chain is connected between the input wheel 421 and the chain wheel, and can also realize the transmission of motion and power, and the specific arrangement of the reversing assembly 42 is not limited herein.

Alternatively, as shown in fig. 1 and 4, the input wheel 421 and the output wheel 422 may both be bevel gears. It can be understood that the bevel gear has the advantages of constant transmission ratio, high transmission efficiency, reliable work, long service life, compact structure and the like, and can be used for changing the power transmission direction. Therefore, the input wheel 421 and the output wheel 422 are both bevel gears, so that the power of the input wheel 421 can be conveniently transmitted to the output wheel 422, the layout of the reversing assembly 42 is also facilitated, and the angle adjusting mechanism 4 can be compactly arranged and reliably operated. In addition, the effect of saving power can be achieved by properly setting the transmission ratio of the two bevel gears.

In other embodiments, the reversing assembly 42 may also include a gear and a rack engaged with each other, and the adjusting rod 43 is disposed on the rack. The reversing component 42 may also comprise a worm wheel and a worm which are engaged with each other, a moving body is arranged on the worm, and the adjusting rod 43 is arranged on the moving body. The above is all capable of realizing the transmission of the reversing assembly 42, and the specific arrangement form of the reversing assembly 42 is not limited herein.

In some alternative embodiments, as shown in fig. 1 and 4, the angle adjusting mechanism 4 further includes a fixing plate 44 vertically disposed in the base 1, the reversing assembly 42 is disposed on the fixing plate 44, the rotating shaft 411 of the hand cranking portion 41 is horizontally disposed, and the lead screw 423 is vertically disposed on the fixing plate 44. So arrange for the structure is compacter, and the operation of being convenient for, like the pivot 411 level setting of hand portion 41, and the manual operation of the person of facilitating the use from this, lead screw 423 vertically sets up on fixed plate 44, is convenient for promote nut 424 at vertical movable range, thereby promotes the scope of angle modulation. In addition, the fixing plate 44 is provided as a base of the angle adjusting mechanism 4, and various parts such as the reversing assembly 42, the lead screw 423 and the like are mounted on the fixing plate 44 to ensure the overall stability.

Specifically, as shown in fig. 4, a slider 45 and a roller 46 fitted to the fixed plate 44 are attached to the nut 424. The roller 46 can play a supporting role, and the transmission stability is improved, so that the comfort of a patient is improved, and the torsional vibration in the rotation direction of the screw rod at the angle adjusting part of the wheelchair is reduced. The roller 46 can convert sliding friction between the moving body and the base into rolling friction, so that the utilization efficiency of input power is high, and friction loss is reduced. The arrangement of the sliding block 45 can further improve the moving stability of the adjusting rod 43. Here, the slider 45 may be an integral part of the nut 424, or the slider 45 may be a separate part and be fitted over the nut 424. The above all can realize stable transmission of power, and are not limited in particular.

Optionally, as shown in fig. 4, the fixing plate 44 is provided with a first supporting seat 441, a second supporting seat 442 and a third supporting seat 443. The synchronizing wheel 426 is disposed on the fixed plate 44 and rotatably supported by the first supporting seat 441, the transition wheel 427 and the synchronizing wheel 426 are disposed on the fixed plate 44 and rotatably supported by the second supporting seat 442, and the screw shaft 423 is disposed on the fixed plate 44 and rotatably supported by the third supporting seat 443. It can be understood that the first supporting seat 441, the second supporting seat 442 and the third supporting seat 443 can respectively provide a rotation supporting position for the reversing assembly 42, so as to improve the operation stability of the reversing assembly 42, and also improve the structural strength of the fixing plate 44, thereby further improving the overall stability of the angle adjusting mechanism 4.

Alternatively, as shown in fig. 4, the fixing plate 44 may be coupled to the base 1 by a fastener 444, so that coupling stability of the fixing plate 44 may be improved. The fixing plate 44 may be a bolt here. Of course, in some other embodiments, the fixing plate 44 may have a slot, and the base plate may have a fixture block, and the fixture block is fitted in the slot, so that the fixing plate 44 and the base plate can be connected, and the specific connection manner of the fixing plate 44 is not limited herein.

Alternatively, as shown in fig. 4, the adjusting lever 43 is connected to the first link 311 by a pin 431, so that the operation stability between the adjusting lever 43 and the first link 311 is improved. Of course, in some embodiments, the adjustment rod 43 and the first link 311 may be connected in other ways, which is not limited herein.

The wheelchair bed 100 in one embodiment of the present invention is described below with reference to the accompanying drawings.

The wheelchair bed 100 according to the embodiment of the present invention includes: the chair comprises a base body 1, a chair body 2, a link mechanism 33 and an angle adjusting mechanism 4.

The base body 1 is provided with road wheels 11.

The chair body 2 is established on base member 1, and the chair body 2 includes a plurality of supports 21, and a plurality of supports 21 include: the seat plate 211, the upper torso plate 212, the lower torso plate 213 and the support legs 2121, wherein the upper torso plate 212 and the lower torso plate 213 are rotatably coupled to opposite sides of the seat plate 211, and the support legs 2121 are rotatably coupled to the rear surface of the upper torso plate 212.

The link mechanism 33 is provided on the base body 1, and the link mechanism 33 includes: the plurality of connecting rods 31, the plurality of connecting rods 31 include a first connecting rod 311 and a second connecting rod 312, the upper end of the first connecting rod 311 is rotatably connected to the seat plate 211, the upper end of the adjusting rod 43 is rotatably connected to the first connecting rod 311, and the adjusting rod 43, the connecting part of the lower end of the adjusting rod 43 and the first connecting rod 311 form a crank block structure. The second link 312 is connected to the rear surface of the upper torso plate 212, and the second link 312 connected to the upper torso plate 212, the seat plate 211, the first link 311, and the base 1 constitute the four-link mechanism 33. The lower torso plate 213 is pivotally connected to the base 1, and the lower torso plate 213, the seat plate 211, the first link 311, and the base 1 constitute a four-bar linkage 33. The plurality of links 31 further includes a third link 313, one end of the third link 313 is rotatably connected to the support leg 2121, and the second link 312, the support leg 2121, the third link 313 and the base 1 constitute a four-bar linkage 33.

The reversing assembly 42 includes: input wheel 421, output wheel 422, lead screw 423, nut 424, drive belt 425, and synchronizing wheel 426. The input wheel 421 is connected to the hand-cranking portion 41. The output wheel 422 rotates in synchronism with the input wheel 421. The lead screw 423 is connected to the output wheel 422. A nut 424 is screw-fitted to the screw shaft 423, and one end of the adjustment lever 43 is connected to the nut 424. The threads of the screw 423 and the nut 424 are self-locking threads. A drive belt 425 is connected between the input wheel 421 and the synchronizing wheel 426 with the input wheel 421 engaging the output wheel 422.

The angle adjusting mechanism 4 includes: hand cranking portion 41, reversing assembly 42, adjusting rod 43 and fixing plate 44. The hand-cranking portion 41 is located on one side of the base body 1, the adjusting rod 43 is connected with the connecting rod mechanism 33, the reversing assembly 42 is connected between the hand-cranking portion 41 and the adjusting rod 43, and the reversing assembly 42 drives one end of the adjusting rod 43 to move when the hand-cranking portion 41 is shaken, so that the connecting rod mechanism 33 drives at least two supports 21 to move. The fixed plate 44 is vertically arranged in the base body 1, the rotating shaft 411 of the hand cranking portion 41 is horizontally arranged, and the screw 423 is vertically arranged on the fixed plate 44. The nut 424 is connected to the slider 45 and the roller 46 fitted to the fixed plate 44.

In practical operation, the chair is shown in fig. 1, and the rotating shaft 411, the synchronous rotation, the synchronous belt rotation and the input wheel 421 rotation can be sequentially driven by swinging the crank counterclockwise, wherein the input wheel 421 and the output wheel 422 are in meshing transmission, so that the rotation direction conversion can be realized, that is, the horizontal rotation is converted into the vertical rotation. The input wheel 421 drives the screw 423 connected to the input wheel to rotate counterclockwise, the screw 423 transmits the rotation to the nut 424, the nut 424 converts the rotation into linear motion toward the input gear side, thereby driving the rollers 46 at two sides of the slider 45 connected to the nut 424 to cling to the fixing plate 44 to do linear motion toward the input wheel 421, driving the adjusting rod 43 connected to the slider 45 to change the angle, and the adjusting rod 43 simultaneously drives the first connecting rod 311 connected to the adjusting rod 43 to change the angle, so that when the first connecting rod 311 rotates, the linkage of the connecting rod mechanism 33 can be realized, and the bracket 21 is driven to change the form until the chair state is completely converted into a flat state, as shown in fig. 3.

The bed is as shown in fig. 3, the rotating shaft 411 can be driven to rotate, synchronously rotate, rotate in a synchronous belt and rotate the input wheel 421 by swinging the crank clockwise, and the input wheel 421 and the output wheel 422 are in meshed transmission, so that the conversion of the rotating direction can be realized, namely, the horizontal rotation is converted into the rotation in the vertical direction. The input wheel 421 drives the screw 423 connected to the input wheel to rotate clockwise, the screw 423 transmits the rotation to the nut 424, the nut 424 converts the rotation into a linear motion in a direction away from the input wheel, thereby driving the rollers 46 at two sides of the slider 45 connected to the nut 424 to cling to the fixing plate 44 to make a linear motion in a direction away from the input wheel 421, and driving the angle of the adjusting rod 43 connected to the slider 45 to change, and the adjusting rod 43 also drives the first connecting rod 311 connected to the adjusting rod 43 to change in angle, so that when the first connecting rod 311 rotates, the linkage of the connecting rod mechanism 33 can be realized, and the bracket 21 is driven to change in shape until the bed state is completely converted into the chair state, as shown in fig. 1.

In the description herein, references to the description of the terms "embodiment," "example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A wheelchair bed comprising:

the base body is provided with traveling wheels;

the chair body is arranged on the base body and comprises a plurality of supports, and the angle between every two adjacent supports is adjustable;

the connecting rod mechanism is arranged on the base body and connected with the at least two brackets, and the connecting rod mechanism drives the angle between the at least two brackets to change when acting;

angle adjustment mechanism, angle adjustment mechanism establishes on the base member and with link mechanism links to each other, angle adjustment mechanism includes: hand portion, switching-over subassembly and regulation pole, hand portion is located one side of base member, it connects to adjust the pole link mechanism, the switching-over subassembly is connected hand portion with between the regulation pole, wave during hand portion the switching-over subassembly drives the one end of adjusting the pole removes, with pass through link mechanism drives at least two the support action.

2. The wheelchair bed of claim 1 wherein the linkage mechanism comprises: and one end of each connecting rod is rotatably connected to the base body, and the other end of each connecting rod is rotatably connected to the support.

3. The wheelchair bed of claim 2 wherein the plurality of brackets comprises: the upper body plate and the lower body plate are rotatably connected to two opposite sides of the seat plate;

the plurality of connecting rods comprise a first connecting rod and a second connecting rod, the upper end of the first connecting rod is rotatably connected to the seat plate, and the upper end of the adjusting rod is rotatably connected to the first connecting rod; the back of the upper trunk plate is connected with the second connecting rod, and the second connecting rod, the seat plate, the first connecting rod and the base body which are connected with the upper trunk plate form a four-bar mechanism.

4. The wheelchair bed of claim 3 wherein the lower torso plate is pivotally connected to the base, the lower torso plate, the seat plate, the first link, and the base forming a four bar linkage.

5. The wheelchair bed of claim 3 wherein the plurality of brackets further comprises: the connecting rods further comprise third connecting rods, one ends of the third connecting rods are rotatably connected to the supporting legs, and the second connecting rods, the supporting legs, the third connecting rods and the base body form a four-bar mechanism.

6. The wheelchair bed of any of claims 1-5 wherein the reversing assembly comprises:

the input wheel is connected with the hand-cranking part;

an output wheel rotating synchronously with the input wheel;

the screw rod is connected to the output wheel;

the nut is in threaded fit with the lead screw, and one end of the adjusting rod is connected to the nut.

7. The wheelchair bed of claim 6 wherein the mating threads of the lead screw and the nut are self-locking threads.

8. The wheelchair bed of claim 6 wherein the reversing assembly further comprises: the transmission belt is connected between the input wheel and the synchronizing wheel, and the input wheel is meshed with the output wheel.

9. The wheelchair bed of claim 6 wherein the angle adjustment mechanism further comprises a fixed plate vertically disposed within the base, the reversing assembly is disposed on the fixed plate, the shaft of the hand crank is horizontally disposed, and the lead screw is vertically disposed on the fixed plate.

10. The wheelchair bed of claim 9 wherein a slider and a roller engaged with the fixed plate are attached to the nut.