CN113786298B

CN113786298B - Self-using auxiliary bed

Info

Publication number: CN113786298B
Application number: CN202111110641.9A
Authority: CN
Inventors: 陈晨松; 王维杰; 林益
Original assignee: Xiangshan First People's Hospital Medical And Health Group
Current assignee: Xiangshan First People's Hospital Medical And Health Group
Priority date: 2021-09-18
Filing date: 2021-09-18
Publication date: 2022-10-28
Anticipated expiration: 2041-09-18
Also published as: CN113786298A

Abstract

The application discloses a self-use auxiliary bed, which comprises a wheelchair body, a bed body with a notch, a jacking mechanism and a first locking piece; the wheelchair body comprises a support frame, a support plate, a backrest plate, a connecting plate, a pedal plate, front wheels, rear wheels and a driving mechanism; the supporting plate is arranged at the upper end of the supporting frame, and the two ends of the supporting plate are respectively rotatably connected with the backrest plate and the supporting plate; the pedal is rotatably connected to the other end of the connecting plate; when the backrest plate, the connecting plate and the pedal plate rotate to be horizontal, the backrest plate, the supporting plate, the connecting plate and the pedal plate fill the gap; the jacking mechanism is connected with the backrest plate in a separated way; the first locking piece comprises a fixing plate, a first mounting frame, a first lock tongue, a first spring and a first electromagnet; when the first electromagnet is electrified to force the first lock tongue to slide towards the inside of the first mounting hole, the jacking mechanism can jack up the backboard; after the first electromagnet is powered off, the first spring forces the first lock tongue to be inserted into the corresponding fixing hole, and locking is achieved. It has the advantages of convenient use, low cost and high safety.

Description

Self-using auxiliary bed

Technical Field

The application relates to the technical field of nursing equipment, in particular to a self-use auxiliary bed.

Background

With the increasing aging of the population, most of the elderly are generally cared for by nurses, nurses or nursing homes. In the nursing process, the old people often need to be moved to a wheelchair from a bed, and the nursing difficulty is high. In order to conveniently transfer old people from a bed to a wheelchair, various intelligent nursing beds for the old people begin to appear in the visual field of people, and the intelligent nursing beds can realize free switching between the beds and the wheelchair, so that the problem that the old people are difficult to move from the beds to the wheelchair is solved.

However, the existing intelligent nursing bed has the following defects: 1. complicated key operation is needed, the old people often have difficulty in remembering the complicated key operation, the use is inconvenient, the old people are easy to fall down when the old people do not operate the key operation, and potential safety hazards exist; 2. various driving mechanisms are required to be arranged, the structure is complex, the manufacturing cost is high, and the economic burden of ordinary families is large.

Disclosure of Invention

An object of this application is to provide a simple structure, convenient to use, it is with low costs, high auxiliary bed of security.

In order to achieve the above purposes, the technical scheme adopted by the application is as follows: a self-service auxiliary bed comprises a bed body, a wheelchair body, a jacking mechanism and a first locking piece, wherein a gap is formed in the tail part of the bed body; the wheelchair body comprises a support frame, a support plate, a backrest plate, a connecting plate, a pedal plate, front wheels, rear wheels and a driving mechanism for driving the rear wheels to rotate; the front wheels and the rear wheels are rotatably arranged at the lower end of the support frame, and the total number of the front wheels and the rear wheels is at least three; the supporting plate is horizontally arranged at the upper end of the supporting frame; one end of the backrest plate is rotatably arranged at one end of the supporting plate, one end of the connecting plate is rotatably arranged at the other end of the supporting plate, and one end of the pedal plate is rotatably arranged at the other end of the connecting plate; when the backrest plate, the connecting plate and the pedal plate respectively rotate to be flush with the supporting plate, the backrest plate, the supporting plate, the connecting plate and the pedal plate just fill the notch; the jacking mechanism is arranged below the notch, and the jacking mechanism is detachably connected with the backrest plate; the first locking piece comprises a fixed plate, a first mounting frame, a first bolt, a first spring and a first electromagnet; the fixed plate is arranged on the support frame, a plurality of fixed holes are formed in the fixed plate at intervals, and the distance between the axis of each fixed hole and the rotation axis of the backrest plate is equal; the first mounting frame is arranged on the lower surface of the back board, a first mounting hole is formed in the first mounting frame, and the first lock tongue is axially and slidably arranged in the first mounting hole; the first spring is arranged in the first mounting hole, and the first electromagnet is arranged on the lower surface of the back board; when the first electromagnet is electrified to force the first lock tongue to slide towards the inside of the first mounting hole and jack up the back board through the jacking mechanism until the first lock tongue is aligned with one of the fixing holes, the first electromagnet is powered off, and the first spring can force the first lock tongue to be inserted into the corresponding fixing hole, so that the rotation of the back board is limited.

Preferably, two ends of the connecting plate are respectively hinged to the supporting plate and the pedal plate; the front end of the support frame is provided with a limiting part and a supporting part; the self-service auxiliary bed also comprises a second locking piece and a third locking piece; the second locking piece comprises a second mounting frame, a second lock tongue, a second spring and a second electromagnet; the second mounting frame is arranged on the lower surface of the bed body, and a second mounting hole is formed in the second mounting frame; the second lock tongue is slidably arranged in the second mounting hole, and an inclined surface structure is obliquely arranged at one end, close to the tail part of the bed body, of the second lock tongue; the second spring is arranged in the second mounting hole, and the second electromagnet is arranged on the lower surface of the bed body; the third locking piece comprises a third mounting frame, a third lock tongue, a third spring and a third electromagnet; the third mounting frame is arranged on the lower surface of the bed body, and a third mounting hole is formed in the third mounting frame; the third lock tongue is slidably arranged in the third mounting hole, and one end, close to the tail part of the bed body, of the third lock tongue is provided with a guide inclined plane in a downward inclined mode; the third spring is arranged in the third mounting hole, and the third electromagnet is arranged on the lower surface of the bed body; when the second electromagnet is electrified to force the second lock tongue to slide towards the inside of the second mounting hole, and the third electromagnet is electrified to force the third lock tongue to slide towards the inside of the third mounting hole, under the action of gravity, the connecting plate rotates to be in contact with the limiting part, the pedal rotates to be in contact with the supporting part, and an included angle alpha between the pedal and the supporting plate is 0-30 degrees; when the backup pad to when removing in the breach, the second electro-magnet and the third electro-magnet is in the outage state, the second spring can force the second spring bolt to the outside of second mounting hole slides, the third spring can force the third spring bolt to the outside of third mounting hole slides, the guide inclined plane can force the connecting plate and the step board rotate in proper order extremely with the backup pad parallel and level, just the second spring bolt and the third spring bolt support respectively in the connecting plate with the lower surface of step board.

Preferably, a protruding part is arranged on the lower surface of the connecting plate, and the protruding part is provided with an insertion hole; the self-service auxiliary bed further comprises a fourth locking piece, and the fourth locking piece comprises a fourth mounting frame, a fourth lock tongue, a fourth spring and a fourth electromagnet; the fourth mounting frame is arranged on the limiting part and is provided with a fourth mounting hole; the fourth spring is arranged in the fourth mounting hole, the fourth electromagnet is arranged on the limiting part; when the connecting plate rotates to be in contact with the limiting part, the fourth electromagnet is electrified to force the fourth bolt to slide towards the inside of the fourth mounting hole; when the connecting plate rotates to be in contact with the limiting part, the fourth electromagnet is powered off, the fourth spring can force the fourth bolt to slide towards the outside of the fourth mounting hole, and the fourth bolt can be inserted into the jack, so that the connecting plate is limited to rotate; when the supporting plate moves towards the inside of the notch, the fourth electromagnet is electrified to force the fourth bolt to be separated from the jack.

Preferably, the two sides of the supporting plate are provided with accommodating grooves, and the inner bottom of each accommodating groove is provided with a through hole in a penetrating manner; the wheelchair body further comprises two handrail frames, each handrail frame comprises a horizontal rod and a vertical rod, the upper end of each vertical rod is connected with the horizontal rod, the lower end of each vertical rod can be arranged in the through hole in a vertically sliding mode, and a plurality of positioning holes are formed in the vertical rods at intervals; the self-service auxiliary bed further comprises a fifth locking piece, and the fifth locking piece comprises a fifth mounting frame, a fifth lock tongue, a fifth spring and a fifth electromagnet; the fifth mounting frame is arranged on the support frame, and a fifth mounting hole is formed in the fifth mounting frame; the fifth lock tongue is slidably arranged in the fifth mounting hole, the fifth spring is arranged in the fifth mounting hole, and the fifth electromagnet is arranged on the support frame; when the fifth electromagnet is electrified to force the fifth lock tongue to slide towards the inside of the fifth mounting hole, the vertical rod can be slid up and down to adjust the height of the horizontal rod, and when the horizontal rod moves to the inside of the accommodating groove, the upper surface of the horizontal rod is flush with the upper surface of the supporting plate; when the vertical rod slides up and down to the position where the fifth bolt is aligned with one of the positioning holes, the fifth electromagnet is powered off, and the fifth spring can force the fifth bolt to be inserted into the corresponding positioning hole, so that the vertical rod is limited to slide up and down.

Preferably, the jacking mechanism comprises a hydraulic cylinder, a connecting rod, a top rod and a guide wheel; the hydraulic cylinder is fixedly arranged below the notch, and the telescopic end of the hydraulic cylinder is hinged between the two ends of the ejector rod; one end of the ejector rod is connected with the lower surface of the backrest plate in a rolling mode through the guide wheel, the other end of the ejector rod is hinged to one end of the connecting rod, and the other end of the connecting rod is fixed to the outer wall of the hydraulic cylinder.

Preferably, the self-service auxiliary bed further comprises a hook, the hook is arranged on the lower surface of the bed body, and a hanging groove is formed in the lower surface of the backrest plate; when the backrest plate, the support plate, the connecting plate and the pedal plate just fill the notch, the hook is hung in the hanging groove, so that the horizontal movement of the support plate is limited; when the back board is jacked up by the jacking mechanism, the hanging groove can be separated from the hook.

Preferably, the self-service auxiliary bed further comprises a plurality of supporting blocks, and the supporting blocks are arranged on the lower surface of the bed body; when the back board, the supporting board, the connecting board and the pedal board just fill the gap, the lower surfaces of the supporting board and the back board are respectively contacted with at least one supporting block; one end of the supporting block close to the tail of the bed body is suitable for being provided with a transition inclined plane in a downward inclining mode.

Preferably, the self-service auxiliary bed further comprises two fixed baffles, two movable baffles and two L-shaped limiting strips; the two fixed baffles are respectively vertically arranged at the tail part of the bed body and are respectively positioned at two sides of the notch; the two limiting strips are symmetrically arranged on the two fixed baffle plates, and one ends of the two movable baffle plates are respectively and rotatably arranged on the fixed baffle plates; when the movable baffle plate rotates downwards to be in a horizontal state, the limiting strip limits the movable baffle plate to continue rotating, and the two movable baffle plates enable the gap to be closed; when the movable baffle plate rotates upwards to a vertical state, the limiting strip limits the movable baffle plate to continue rotating.

Preferably, the driving mechanism comprises a first ratchet wheel, a second ratchet wheel, a pawl, a torsion spring, a fixed shaft, a sleeve and a push rod with adjustable length; the first ratchet wheel is coaxially arranged on the rear wheel, one end of the fixed shaft is coaxially arranged on one end of the first ratchet wheel, which deviates from the rear wheel, and the second ratchet wheel is coaxially arranged on the other end of the fixed shaft; the sleeve is coaxially and rotatably arranged in the middle of the fixed shaft, and a circular ring sleeve radially protrudes from the sleeve; the lower end of the push rod is axially movably and rotatably arranged in the annular sleeve, a mounting part radially protrudes out of the outer wall of the push rod, the mounting part is positioned above the annular sleeve, and a containing hole is formed in one end, deviating from the push rod, of the mounting part; the pawl is rotatably arranged at the outer end of the mounting part, and the torsion spring is arranged in the accommodating hole; when the push rod is pulled upwards along the axial direction of the annular sleeve, the push rod is rotated to enable the pawl to move to the position right above the first ratchet wheel, and then the push rod is pushed downwards along the axial direction of the annular sleeve, the torsion spring can force the pawl to be meshed with the first ratchet wheel, at the moment, the push rod is shaken to enable the push rod to rotate around the axis of the fixed shaft in a reciprocating mode, and the rear wheel is forced to rotate forwards; when the push rod is pulled upwards along the axial direction of the annular sleeve and is rotated to enable the pawl to move to the position right above the second ratchet wheel, and then the push rod is pushed downwards along the axial direction of the annular sleeve, the torsion spring can force the pawl to be meshed with the second ratchet wheel, at the moment, the push rod is shaken to enable the push rod to rotate around the axis of the fixed shaft in a reciprocating mode, and the rear wheel is forced to rotate in the reverse direction.

Preferably, the driving mechanism further comprises a return spring, a sealing cover and a limiting block with a cylindrical structure; the limiting block is arranged at the lower end of the push rod and can be axially slidably and rotatably arranged in the circular sleeve; the sealing cover is suitable for being detachably arranged at one end, deviating from the sleeve, of the circular ring sleeve, a yielding hole is formed in the sealing cover in a penetrating mode, and the push rod can be axially slidably and rotatably arranged in the yielding hole; the reset spring is arranged in the sleeve and used for forcing the limiting block to slide towards the direction close to the sleeve.

Preferably, a positioning chute penetrates through the outer wall of the circular ring sleeve, the positioning chute comprises two vertical grooves and one horizontal groove, and the two vertical grooves and the horizontal groove are connected to form an n-shaped structure; positioning rods are radially arranged on the outer ring surface of the limiting block and are slidably arranged in the vertical grooves and the horizontal grooves; when the positioning rod slides to the lower end of one of the vertical grooves, the pawl is meshed with the first ratchet wheel; when the positioning rod slides to the lower end of the other vertical groove, the pawl is meshed with the second ratchet wheel; when the push rod is pulled upwards along the axial direction of the circular ring sleeve, the positioning rod slides to the upper end of the vertical groove, then the push rod rotates around the axis of the circular ring sleeve, and the positioning rod can slide between the two vertical grooves in a reciprocating manner through the horizontal grooves.

Preferably, an extension rod protrudes from a part, facing the accommodating hole, of the pawl, and an installation groove is formed in one end, deviating from the pawl, of the extension rod; a limiting groove with a sector structure is arranged in the accommodating hole; a first shaft hole penetrating through the extension rod is formed in the surface, deviating from the accommodating hole, of the pawl, and a threaded hole which is coaxial with the limiting groove is formed in the accommodating hole; the driving mechanism further comprises a limiting plate and a locking screw; the limiting plate is arranged in the mounting groove, the end part of the limiting plate radially extends to the outside of the extension rod, and the end part of the limiting plate is slidably arranged in the limiting groove; the locking screw comprises a big head end, a threaded end and a cylindrical section arranged between the big head end and the threaded end; the cylindrical section is rotatably arranged in the first shaft hole, and the threaded end is in threaded connection with the threaded hole; the torsion spring is sleeved on the extension rod, one end of the torsion spring is fixed on the pawl, and the other end of the torsion spring is fixed in the accommodating hole.

Preferably, the support frame is provided with an installation shaft which is coaxial with the fixed shaft, the axis of the rear wheel is provided with a second shaft hole in a penetrating manner, and the second shaft hole is rotatably arranged on the installation shaft; a pore passage axially penetrates through the fixed shaft; the driving mechanism further comprises a protective cover, and the protective cover comprises an inner cover body and an outer cover body; the inner cover body is coaxially arranged between the first ratchet wheel and the rear wheel; the outer cover body is positioned on one side of the fixed shaft deviating from the mounting shaft, a supporting rod protrudes from the surface of the outer cover body facing the fixed shaft, and one end of the supporting rod deviating from the outer cover body penetrates through the pore passage and then is connected with the mounting shaft; the outer cover body wrap up in the outside of the inner cover body, the outer cover body with leave the clearance between the inner cover body, just be equipped with on the outer cover body and be used for avoiding right the push rod produces the opening of stepping down of interfering.

Compared with the prior art, the beneficial effect of this application lies in: (1) When the wheelchair is used, the backrest plate, the connecting plate and the pedal plate can be controlled to rotate respectively to be flush with the supporting plate so as to be just filled in the position of the notch, so that the wheelchair body and the bed body are mutually combined into a bed shape, and the function of the bed is realized. When the end of the backrest plate deviating from the support plate is turned upwards by a proper angle and then locked by the first locking piece, the backrest plate can support the back of a user, so that the user can sit on the support plate conveniently; the connecting plate and the pedal plate are further controlled to rotate, so that an included angle between one end of the pedal plate, deviating from the connecting plate, and the horizontal plane is 0-30 degrees, a user can comfortably step on the pedal plate by feet to form a wheelchair shape, and the user does not need to be carried to a wheelchair by nursing staff.

(2) When controlling first electro-magnet circular telegram, can attract first spring bolt to the inside of first mounting hole slides, realizes first spring bolt with the fixed orifices separation to relieve the locking of back board, can cooperate the jack-up mechanism makes after the back board rotates to suitable angle, after again controlling first electro-magnet outage, first spring forces first spring bolt inserts the correspondence in the fixed orifices, in order to realize to the locking of back board. In the whole process, only the lifting of the jacking mechanism and the power on and off of the first electromagnet need to be controlled; and after the wheelchair body leaves the notch, the jacking mechanism is separated, so that the increase of the overall cost and the control difficulty due to the need of arranging various complex driving structures on the wheelchair body are avoided.

(3) Under the action of the second locking piece and the third locking piece, the second electromagnet and the third electromagnet can be electrified to attract the second lock tongue to slide into the second mounting hole and attract the third lock tongue to slide into the second mounting hole, so that the connecting plate and the pedal plate automatically rotate under the action of gravity until the connecting plate is contacted with the limiting part and the pedal plate is contacted with the supporting part to deform into a wheelchair shape; when the wheelchair body recedes and enters the notch, the second electromagnet and the third electromagnet are powered off, the second spring forces the second lock tongue to slide to the outside of the second mounting hole, the third spring forces the third lock tongue to slide to the outside of the third mounting hole, and at the moment, the guide inclined plane can automatically force the connecting plate and the pedal plate to coincide and rotate to a horizontal state, so that the wheelchair body recovers to a bed shape. The whole process only needs to control the power on and off of the second electromagnet and the third electromagnet, a complex driving structure is not needed to be arranged on the wheelchair body to drive the connecting plate and the pedal to rotate, and the overall cost and the control difficulty are further reduced.

(4) Under actuating mechanism's effect, can be through hand the push rod, in order to realize advancing and retreating of wheelchair body, easy operation, and more laborsaving can avoid setting up the drive simultaneously rear wheel pivoted drive structure and transmission structure have further reduced holistic cost and the degree of difficulty of controlling, compare in current electric control mode, and the security is higher.

Drawings

Fig. 1 is a perspective view of a self-service auxiliary bed provided by the present application, and shows a bed shape.

Fig. 2 is a cross-sectional view of the self-service cot of fig. 1 provided herein, illustrating the operation of the jack-up mechanism and the hook.

Fig. 3 is an exploded view of the self-service cot of fig. 1 provided by the present application and illustrating a wheelchair configuration.

Fig. 4 is a partial enlarged view at I in fig. 3 provided herein.

Fig. 5 is a perspective view of the second retaining member of fig. 4 as provided herein.

Fig. 6 is a partial enlarged view of fig. 3 at II provided in the present application.

Fig. 7 is a perspective view of the third retaining member of fig. 6 as provided herein.

Figure 8 is a right side view of a portion of the structure of the body of the wheelchair of figure 3 as provided herein.

FIG. 9 isbase:Sub>A cross-sectional view taken along A-A of FIG. 8 as provided herein.

Fig. 10 is a partial enlarged view at III in fig. 9 provided herein.

FIG. 11 is a cross-sectional view taken along B-B of FIG. 8 as provided herein.

Fig. 12 is an enlarged view of a portion of fig. 11 at IV as provided herein.

FIG. 13 is a cross-sectional view taken along C-C of FIG. 8 as provided herein.

Fig. 14 is a partial enlarged view of V in fig. 13 provided herein.

Fig. 15 is an enlarged view of the drive mechanism of fig. 3 provided herein.

Fig. 16 is an exploded view of the drive mechanism of fig. 15 as provided by the present application.

Fig. 17 is a schematic view of the installation of the drive mechanism of fig. 15 provided herein.

Fig. 18 is an enlarged view of a portion of fig. 17 at VI provided herein.

Fig. 19 is an exploded view of a portion of the structure of fig. 16 provided in the present application.

Fig. 20 is an exploded view of a portion of the structure of fig. 19 provided herein.

Fig. 21 is a sectional view of a portion of the structure in fig. 19 provided herein.

Fig. 22 is a schematic view of an internal structure of the mounting part in fig. 21 according to the present application.

Fig. 23-24 are functional diagrams of the pawl provided herein.

In the figure: 1. a bed body; 11. a notch; 2. a wheelchair body; 20. a handrail frame; 201. a horizontal bar; 202. a vertical rod; 2021. positioning holes; 21. a support frame; 211. a limiting part; 212. a support portion; 213. installing a shaft; 22. a support plate; 221. accommodating grooves; 222. a through hole; 23. a back board; 231. a hanging groove; 24. a connecting plate; 241. a projection; 242. a jack; 25. a step plate; 26. a front wheel; 27. a rear wheel; 271. a second shaft hole; 28. a drive mechanism; 281. a first ratchet wheel; 282. a second ratchet; 283. a pawl; 2831. an extension rod; 2832. mounting grooves; 2833. a first shaft hole; 284. a torsion spring; 285. a fixed shaft; 2851. a duct; 286. a sleeve; 2861. a circular ring sleeve; 2862. positioning the chute; 287. a push rod; 2871. an installation part; 2872. an accommodation hole; 2873. a limiting groove; 2874. a threaded hole; 2875. an outer rod body; 2876. an inner rod body; 2877. screwing the screw by hand; 288. a return spring; 289. a sealing cover; 290. a limiting block; 2901. positioning a rod; 291. a limiting plate; 292. locking the screw; 293. a protective cover; 2931. an inner cover body; 2932. an outer cover body; 2933. a abdication opening is formed; 2934. a support bar; 294. An anti-slip sheath; 3. a jacking mechanism; 31. a hydraulic cylinder; 32. a connecting rod; 33. a top rod; 34. a guide wheel; 4. a first locking member; 41. a fixing plate; 411. a fixing hole; 42. a first mounting bracket; 421. a first mounting hole; 43. a first lock tongue; 44. a first spring; 45. a first electromagnet; 5. a second locking member; 51. a second mounting bracket; 511. a second mounting hole; 52. a second lock tongue; 521. a bevel structure; 53. a second spring; 54. a second electromagnet; 6. a third locking member; 61. a third mounting bracket; 611. a third mounting hole; 62. a third bolt; 621. a guide ramp; 63. a third spring; 64. a third electromagnet; 7. a fourth locking member; 71. a fourth mounting bracket; 711. a fourth mounting hole; 72. a fourth bolt; 73. a fourth spring; 74. a fourth electromagnet; 8. a fifth locking member; 81. a fifth mounting bracket; 811. a fifth mounting hole; 82. a fifth bolt; 83. a fifth spring; 84. a fifth electromagnet; 91. hooking; 92. a support block; 921. a transition bevel; 93. fixing a baffle plate; 94. a movable baffle; 95. a limiting strip; 100. riveting; 200. a first bolt; 300. a second bolt; 400. and a bearing.

Detailed Description

The present application is further described below with reference to specific embodiments, and it should be noted that, without conflict, any combination between the embodiments or technical features described below may form a new embodiment. It should be noted that in the description of the present application, for the terms of orientation, such as "central", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., it is indicated that the orientation and positional relationship are based on the orientation or positional relationship shown in the drawings, and it is only for convenience of description and simplification of the description, but does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and should not be construed as limiting the specific scope of protection of the present application. Furthermore, the terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. Furthermore, the terms "comprises" and "comprising," and any variations thereof, in the description and claims of this application, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Referring to fig. 1-3, an embodiment of the present application provides a self-service auxiliary bed, which includes a bed body 1 and a wheelchair body 2, wherein a gap 11 is formed at the tail of the bed body 1; the wheelchair body 2 comprises a support frame 21, a support plate 22, a backrest plate 23, a connecting plate 24, a pedal 25, a front wheel 26, a rear wheel 27 and a driving mechanism 28 for driving the rear wheel 27 to rotate; the front wheels 26 and the rear wheels 27 are rotatably arranged at the lower end of the support frame 21, and the total number of the front wheels 26 and the rear wheels 27 is at least three; the supporting plate 22 is horizontally arranged at the upper end of the supporting frame 21; one end of the backboard 23 is rotatably disposed at one end of the support plate 22, one end of the connecting plate 24 is rotatably disposed at the other end of the support plate 22, and one end of the footboard 25 is rotatably disposed at the other end of the connecting plate 24. When the wheelchair is used, the backrest plate 23, the connecting plate 24 and the pedal plate 25 are controlled to rotate to be flush with the supporting plate 22 respectively, so that the backrest plate 23, the supporting plate 22, the connecting plate 24 and the pedal plate 25 are just filled in the gap 11, and at the moment, the wheelchair body 2 and the bed body 1 are combined with each other to form a bed shape (as shown in fig. 1). The back rest plate 23 is controlled to be turned upwards at one end deviating from the support plate 22 so as to support the back of a user, and the user can conveniently sit on the support plate 22; the connecting plate 24 can be rotated to the lower part of the supporting plate 22 by controlling the rotation of the connecting plate 24 and the pedals, and the pedals are rotated to the horizontal state (or the included angle between one end of each pedal, deviating from the connecting plate 24, and the horizontal plane is 0-30 degrees as shown in fig. 8), at the moment, the wheelchair body 2 is independently changed into a wheelchair shape, namely, a user directly sits on the wheelchair body 2, so that the user does not need to be moved to the wheelchair body 2.

2-3 and 8-10, in order to realize the automatic up-and-down turning of the backboard 23, the self-using auxiliary bed further comprises a jacking mechanism 3 and a first locking piece 4; the first locking member 4 includes a fixed plate 41, a first mounting bracket 42, a first latch 43, a first spring 44, and a first electromagnet 45; the fixed plate 41 is arranged on the support frame 21, a plurality of fixed holes 411 are arranged on the fixed plate 41 at intervals, and the distance between the axis of each fixed hole 411 and the rotation axis of the backrest plate 23 is equal; the first mounting bracket 42 is arranged on the lower surface of the backrest plate 23, a first mounting hole 421 is arranged on the first mounting bracket 42, and the first bolt 43 is axially slidably arranged in the first mounting hole 421; the first spring 44 is disposed in the first mounting hole 421, and the first electromagnet 45 is disposed on the lower surface of the back plate 23. When the back board 23 needs to be controlled to be turned over up and down, as shown in fig. 10, the first electromagnet 45 is energized to force the first lock tongue 43 to slide towards the inside of the first mounting hole 421 (i.e. the first lock tongue 43 is separated from the fixing hole 411, and the locking of the back board 23 is released); at this time, the back board 23 can be jacked up by the jacking mechanism 3 (or the jacking mechanism 3 supports the back board 23 to descend under the action of gravity), after the back board 23 rotates by a proper angle, the first electromagnet 45 is powered off until the first bolt 43 is rewashed and aligned with one of the fixing holes 411, and the first spring 44 can force the first bolt 43 to be inserted into the corresponding fixing hole 411, so that the rotation of the back board 23 is limited. As shown in fig. 8, the number of the fixing holes 411 is preferably four, and is turned upward by 0 °, 30 °, 60 °, and 90 ° from right to left in sequence corresponding to the back plate 23.

Referring to fig. 3, in order to simplify the structure of the wheelchair body 2, the jacking mechanism 3 may be disposed below the notch 11, and the jacking mechanism 3 and the back plate 23 may be detachably connected, so that the structure of the wheelchair body 2 may be greatly reduced; meanwhile, the back board 23 can be held by hand, and the first electromagnet 45 is electrified, so that the back board 23 can be manually rotated after the first bolt 43 is separated from the fixed hole 411, and the turning angle of the back board 23 can be manually adjusted.

The present application does not limit the specific structure of the jacking mechanism 3, and reference is made to the following structure which provides only one: referring to fig. 2-3, the jacking mechanism 3 includes a hydraulic cylinder 31, a connecting rod 32, a ram 33, and a guide wheel 34; the hydraulic cylinder 31 is fixedly arranged below the notch 11, and the telescopic end of the hydraulic cylinder 31 is hinged between the two ends of the ejector rod 33; one end of the push rod 33 is connected with the lower surface of the back board 23 in a rolling way through a guide wheel 34, the other end of the push rod 33 is hinged with one end of the connecting rod 32, and the other end of the connecting rod 32 is fixed on the outer wall of the hydraulic cylinder 31. As shown in fig. 2, when the telescopic end of the hydraulic cylinder 31 extends out, the right end of the ejector rod 33 can be driven to rotate upwards around the left end, so that the back board 23 can be jacked up; when the telescopic end of the hydraulic cylinder 31 is retracted, the back board 23 is always in contact with the guide wheel 34 under the action of gravity, and the ejector rod 33 supports the back board 23, so that the back board 23 can slowly descend. Meanwhile, the guide wheels 34 can roll on the lower surface of the back board 23, so that the friction resistance between the ejector rods 33 and the back board 23 can be reduced, the back board 23 can be lifted more smoothly, and abrasion and noise caused by friction in use can be avoided. In addition, if the top rod 33 cannot jack the back board 23 to the vertical state (i.e. the included angle between the back board 23 and the supporting plate 22 is 90 °), the top rod 33 can jack the back board 23 upwards to turn the left end of the back board 23 upwards to the maximum extent, and then the wheelchair body 2 is controlled to retreat, at this time, the back board 23 acts on the guide wheel 34, so that the left end of the back board 23 can be further turned upwards.

In the present application, the two ends of the connecting plate 24 may be hinged to the supporting plate 22 and the foot plate 25, respectively. The connecting plate 24 and the supporting plate 22 may be directly hinged, or the connecting plate 24 may be hinged to the supporting frame 21 by a rivet 100 (as shown in fig. 11), which is equivalent to the indirect hinge between the connecting plate 24 and the supporting plate 22. The front end of the supporting frame 21 is provided with a limiting part 211 and a supporting part 212 (as shown in fig. 8); the self-service auxiliary bed also comprises a second locking member 5 and a third locking member 6. In the bed shape, the connecting plate 24 can be supported by the second locking piece 5, so that the connecting plate 24 is kept in a horizontal state; and the third locking piece 6 can support the pedal 25 to maintain the pedal 25 in a horizontal state. After the supporting action of the second locking member 5 and the third locking member 6 is released, the connecting plate 24 rotates to contact with the limiting portion 211 and the pedal 25 rotates to contact with the supporting portion 212 under the action of gravity as shown in fig. 8, that is, the bed shape is converted into the wheelchair shape. It should be noted that the angle of the footboard 25 can be changed by changing the included angle between the supporting portion 212 and the limiting portion 211; preferably, the included angle α between the foot plate 25 and the support plate 22 (i.e., horizontal plane) is 0 ° -30 ° (as shown in fig. 8), which improves the comfort of stepping on the foot.

Referring to fig. 3 to 5, the second locker 5 includes a second mounting bracket 51, a second locking tongue 52, a second spring 53, and a second electromagnet 54; the second mounting rack 51 is arranged on the lower surface of the bed body 1, and a second mounting hole 511 is formed in the second mounting rack 51; the second bolt 52 is slidably disposed in the second mounting hole 511, and an inclined surface structure 521 is disposed at one end of the second bolt 52 close to the rear portion of the bed body 1 and inclined downward; the second spring 53 is disposed in the second mounting hole 511, and the second electromagnet 54 is disposed on the lower surface of the bed body 1. When the second electromagnet 54 is energized, the second electromagnet 54 generates an attractive force on the second locking tongue 52, so that the second locking tongue 52 is forced to slide towards the inside of the second mounting hole 511, i.e. the second locking tongue 52 loses the supporting function on the connecting plate 24.

Referring to fig. 3, 6 and 7, the third locker 6 includes a third mounting bracket 61, a third locking tongue 62, a third spring 63 and a third electromagnet 64; the third mounting rack 61 is arranged on the lower surface of the bed body 1, and a third mounting hole 611 is formed in the third mounting rack 61; the third bolt 62 is slidably disposed in the third mounting hole 611, and a guiding inclined surface 621 is disposed at one end of the third bolt 62 close to the rear portion of the bed body 1 and is inclined downward; the third spring 63 is disposed in the third mounting hole 611, and the third electromagnet 64 is disposed on the lower surface of the bed body 1. When the third electromagnet 64 is energized, the third electromagnet 64 generates an attractive force on the third latch 62, so that the third latch 62 is forced to slide towards the inside of the third mounting hole 611, i.e. the third latch 62 loses the supporting function of the pedal.

Referring to fig. 2 to 8, when the wheelchair body 2 leaves the notch 11, the second latch 52 is forced to slide into the second mounting hole 511 by the second electromagnet 54, and the third latch 62 is forced to slide into the third mounting hole 611 by the third electromagnet 64, so as to avoid the second latch 52 and the third latch 62 interfering with the leaving of the wheelchair body 2. When the wheelchair body 2 backs up to enter the notch 11 (i.e. the supporting plate 22 moves towards the notch 11), the second electromagnet 54 and the third electromagnet 64 are controlled to be in a power-off state, the second spring 53 can force the second bolt 52 to slide towards the outside of the second mounting hole 511, the third spring 63 can force the third bolt 62 to slide towards the outside of the third mounting hole 611, and the guide inclined surface 621 can force the connecting plate 24 and the pedal plate 25 to rotate to a horizontal state in sequence, i.e. the connecting plate 24 and the pedal plate 25 automatically rotate to be flush with the supporting plate 22; meanwhile, the second latch 52 and the third latch 62 support the lower surfaces of the connecting plate 24 and the step plate 25, respectively, to maintain the connecting plate 24 and the step plate 25 in a horizontal state. In addition, when the air pressure of the rear wheel 27 is insufficient, the height of the support plate 22 is reduced, that is, the lower surface of the support plate 22 is lower than the upper end surface of the second latch 52, that is, the second latch 52 abuts against the support plate 22, so that the support plate 22 cannot normally enter the notch 11; after the inclined plane structure 521 is disposed, the inclined plane structure 521 can guide the support plate 22, so that the lower surface of the support plate 22 can slide to the upper end surface of the second latch tongue 52 along the inclined plane structure 521, thereby ensuring that the support plate 22 can normally enter the notch 11.

Referring to fig. 8 and 11 to 12, in the wheelchair mode, in order to prevent the link plates 24 and the footboard 25 from being shaken, the self-service cot further includes a fourth locker 7 for locking the link plates 24. Specifically, a projection 241 is provided on the lower surface of the connection plate 24, and an insertion hole 242 is provided in the projection 241. The fourth locking member 7 includes a fourth mounting bracket 71, a fourth latch 72, a fourth spring 73, and a fourth electromagnet 74; the fourth mounting bracket 71 is arranged on the limiting part 211, and a fourth mounting hole 711 is arranged on the fourth mounting bracket 71; the fourth latch 72 is slidably disposed in the fourth mounting hole 711, the fourth spring 73 is disposed in the fourth mounting hole 711, and the fourth electromagnet 74 is disposed on the stopper 211. Referring to fig. 8 and 10, before the connecting plate 24 rotates to contact the limiting portion 211, the fourth electromagnet 74 is energized to force the fourth latch 72 to slide toward the inside of the fourth mounting hole 711, so as to avoid interference between the fourth latch 72 and the protruding portion 241; when the connecting plate 24 rotates to contact with the limiting part 211, the fourth electromagnet 74 is powered off, the fourth spring 73 forces the fourth latch 72 to slide towards the outside of the fourth mounting hole 711, and the fourth latch 72 is inserted into the insertion hole 242, so that the connecting plate 24 and the pedal plate 25 are limited from shaking; when the support plate 22 moves into the notch 11, the fourth electromagnet 74 is energized to force the fourth latch 72 to slide into the fourth mounting hole 711 (i.e., the fourth latch 72 is separated from the insertion hole 242), so that the locking of the connecting plate 24 is released, and the guide slope 621 can normally force the connecting plate 24 and the pedal plate 25 to rotate to the horizontal state.

Referring to fig. 8 and 13-14, accommodating grooves 221 are formed at both sides of the supporting plate 22, and through holes 222 are formed through the inner bottoms of the accommodating grooves 221; the wheelchair body 2 further comprises two handrail frames 20, each handrail frame 20 comprises a horizontal rod 201 and a vertical rod 202, the upper end of each vertical rod 202 is connected with the horizontal rod 201, the lower end of each vertical rod 202 can be arranged in the through hole 222 in a vertically sliding mode, and a plurality of positioning holes 2021 are formed in the vertical rods 202 at intervals. The self-service auxiliary bed further comprises a fifth locking piece 8, and the fifth locking piece 8 comprises a fifth mounting frame 81, a fifth locking bolt 82, a fifth spring 83 and a fifth electromagnet 84; the fifth mounting rack 81 is arranged on the support frame 21, and a fifth mounting hole 811 is formed in the fifth mounting rack 81; the fifth latch 82 is slidably disposed in the fifth mounting hole 811, the fifth spring 83 is disposed in the fifth mounting hole 811, and the fifth electromagnet 84 is disposed on the support frame 21. The number of the vertical rods 202 is at least one, and one of the vertical rods 202 has a plurality of positioning holes 2021. When the vertical rod 202 is unlocked, as shown in fig. 14, the vertical rod 202 can be slid up and down to adjust the height of the horizontal rod 201, and at this time, the fifth electromagnet 84 is energized, so that the fifth electromagnet 84 generates an attractive force on the fifth bolt 82, and the fifth bolt 82 is forced to slide towards the inside of the fifth mounting hole 811 (i.e., the fifth bolt 82 is separated from the positioning hole 2021), so as to unlock the vertical rod 202; during height adjustment, the fifth electromagnet 84 is powered off until the fifth bolt 82 is aligned with the corresponding positioning hole 2021, and the fifth spring 83 forces the fifth bolt 82 to be inserted into the corresponding positioning hole 2021, so as to limit the vertical rod 202 to slide up and down. In the wheelchair state, as shown in fig. 2, the height of the horizontal rod 201 can be reasonably adjusted according to the height and body shape of the user; in the bed configuration, as shown in fig. 1, the vertical rod 202 slides downward to the lowest point (i.e. the horizontal rod 201 descends to the lowest point), at this time, the horizontal rod 201 is just accommodated in the accommodating groove 221, and the upper surface of the horizontal rod 201 is flush with the upper surface of the supporting plate 22, so as to avoid the use influence caused by the protrusion of the horizontal rod 201.

Referring to fig. 2 to 3, the self-service auxiliary bed further includes a hook 91, the hook 91 is disposed on the lower surface of the bed body 1, and the lower surface of the backboard 23 is provided with a hanging groove 231. As shown in fig. 2, when the backrest plate 23, the support plate 22, the connection plate 24 and the footboard 25 just fill the gap 11, the hook 91 is hooked in the hooking groove 231 to restrict the horizontal movement of the support plate 22, thereby maintaining the stability of the bed shape. When the back board 23 is jacked up by the jacking mechanism 3, the hooking groove 231 is separated from the hook 91 to release the locking of the back board 23, so that the wheelchair body 2 can normally leave the notch 11.

Referring to fig. 3, in some embodiments of the present application, the self-service auxiliary bed further includes a plurality of support blocks 92, the plurality of support blocks 92 being disposed on the lower surface of the bed body 1; when the back plate 23, the support plate 22, the connecting plate 24 and the footboard 25 just fill the gap 11, the lower surfaces of the support plate 22 and the back plate 23 are in contact with at least one support block 92, respectively; the end of the support block 92 near the end of the bed body 1 is adapted to be inclined downwards to form a transition inclined surface 921. In the bed form, the supporting block 92 can support the backrest plate 23 and the supporting plate 22, so that the overall strength of the bed form is improved; in addition, when the air pressure of the rear wheel 27 is insufficient, the height of the support plate 22 is lower, and the lower surfaces of the support plate 22 and the back plate 23 can slide to the upper surface of the support block 92 along the transition inclined surface 921, so that the support plate 22 and the back plate 23 can be always flush with the bed body 1.

Referring to fig. 1, 3 and 6, the self-service auxiliary bed further includes two fixed baffles 93, two movable baffles 94 and two L-shaped limiting strips 95; the two fixed baffles 93 are respectively vertically arranged at the tail part of the bed body 1, and the two fixed baffles 93 are respectively positioned at two sides of the gap 11; the two limit strips 95 are symmetrically disposed on the two fixed baffles 93, and one ends of the two movable baffles 94 are respectively rotatably disposed on the fixed baffles 93. Wherein, the movable baffle 94 can be connected with the fixed baffle 93 in a rotatable manner through riveting. When the movable baffle 94 rotates downwards to a horizontal state, the limiting strip 95 limits the movable baffle 94 to continue rotating, so that the notch 11 is closed (as shown in fig. 1), thereby not only preventing articles from falling from the bed tail, but also preventing the wheelchair body 2 from leaving the notch 11; when the movable baffle 94 rotates upwards to the vertical state, the limit strip 95 limits the movable baffle 94 to rotate continuously, so that the gap 11 is opened (as shown in fig. 3 and 6), and the wheelchair body 2 can normally leave the gap 11.

Referring to fig. 3 and 15-19, the drive mechanism 28 includes a first ratchet wheel 281, a second ratchet wheel 282, a pawl 283, a torsion spring 284, a fixed shaft 285, a sleeve 286, and an adjustable length push rod 287; as shown in fig. 18, the first ratchet wheel 281 is coaxially disposed on the rear wheel 27, one end of the fixed shaft 285 is coaxially disposed on one end of the first ratchet wheel 281 offset from the rear wheel 27, and the second ratchet wheel 282 is coaxially disposed on the other end of the fixed shaft 285; a sleeve 286 is coaxially and rotatably arranged in the middle of the fixed shaft 285, and an annular sleeve 2861 (shown in fig. 19) radially protrudes from the sleeve 286; the lower end of the pushrod 287 is axially movably and rotatably disposed in the annular sleeve 2861, a mounting portion 2871 is radially protruded from the outer wall of the pushrod 287, the mounting portion 2871 is located above the annular sleeve 2861, and a receiving hole 2872 is disposed at one end of the mounting portion 2871 away from the pushrod 287; the pawls 283 are rotatably disposed at the outer ends of the mounting portions 2871, and the torsion spring 284 is disposed in the receiving hole 2872 (as shown in fig. 21). In use, when the push rod 287 is pulled up along the axial direction of the circular ring 2861 and the push rod 287 is rotated to move the pawl 283 to be right above the second ratchet wheel 282, and the push rod 287 is pushed down along the axial direction of the circular ring 2861, the torsion spring 284 forces the pawl 283 to be engaged with the second ratchet wheel 282 (as shown in fig. 23), and at this time, the push rod 287 is shaken (i.e. the push rod 287 is pushed forward and pulled backward repeatedly), so that the push rod 287 rotates back and forth around the axis of the fixed shaft 285 to force the rear wheel 27 to rotate reversely; specifically, when the push rod 287 is pushed forward, the pawl 283 is separated from the tooth groove on the outer periphery of the second ratchet wheel 282 (as shown in fig. 24), and no driving force is generated on the second ratchet wheel 282; when the push rod 287 is pulled backwards, the pawl 283 is fully meshed with the second ratchet wheel 282, so as to drive the second ratchet wheel 282 to rotate anticlockwise, i.e. the fixed shaft 285, the first ratchet wheel 281 and the rear wheel 27 all rotate synchronously with the second ratchet wheel 282 to drive the wheelchair body 2 to move backwards; the wheel chair body 2 can be driven to retreat continuously by repeatedly rocking the push rod 287. Similarly, when the push rod 287 is pulled up along the axial direction of the ring 2861, and the push rod 287 is rotated to move the pawl 283 to be right above the first ratchet wheel 281, and the push rod 287 is pushed down along the axial direction of the ring 2861, the torsion spring 284 can force the pawl 283 to be engaged with the first ratchet wheel 281; since the direction of the tooth grooves on the outer periphery of the first ratchet wheel 281 is opposite to the direction of the tooth grooves on the outer periphery of the second ratchet wheel 282, the push rod 287 is swung to rotate back and forth around the axis of the fixed shaft 285, so that the rear wheel 27 is forced to rotate forward, and the wheelchair body 2 moves just opposite to the backward movement state (when the pawl 283 is engaged with the second ratchet wheel 282), that is, the wheelchair body 2 can be driven forward. In addition, the length of the push rod 287 can be reasonably adjusted according to the height of the user, so as to facilitate the operation of the user; meanwhile, in the bed configuration, the length of the push rod 287 can be shortened to avoid interference between the upper end of the push rod 287 and the bed body 1. It should be noted that the length adjustment manner of the push rod 287 is not limited in the present application, and only one reference structure is provided below: as shown in fig. 19, the push rod 287 includes an outer rod 2875, an inner rod 2876 and a hand screw 2877, wherein the inner rod 2876 is slidably connected to the inside of the hollow outer rod 2875, and the hand screw 2877 is threadedly connected to the lower end of the outer rod 2875; when the thumb screw 2877 is unscrewed, the outer rod body 2875 can be pulled to adjust the overall length of the push rod 287; the length of pushrod 287 is maintained as the thumb screw 2877 is tightened. Meanwhile, the upper end of the push rod 287 (or the outer rod 2875) may be provided with an anti-slip sheath 294.

Referring to fig. 20-21, the drive mechanism 28 further includes a return spring 288, a seal cover 289, and a stop block 290 of cylindrical configuration; the limiting block 290 is arranged at the lower end of the push rod 287, and the limiting block 290 can be axially slidably and rotatably arranged in the annular sleeve 2861; the sealing cover 289 is suitable for being detachably arranged at one end, deviating from the sleeve 286, of the annular sleeve 2861, a yielding hole 2891 is formed in the sealing cover 289 in a penetrating mode, and the push rod 287 can be axially slidably and rotatably arranged in the yielding hole 2891; a return spring 288 is disposed within the sleeve 286, and the return spring 288 is configured to urge the stop block 290 to slide in a direction toward the sleeve 286. Wherein, spacing cooperation between stopper 290 and the ring cover 2861 and between push rod 287 and the hole of stepping down 2891 has improved push rod 287 along the axial slip precision of ring cover 2861 and around the rotatory precision of ring cover 2861 axis emergence. The return spring 288 may automatically force the push rod 287 to return when the force pulling the push rod 287 axially along the torus 2861 is removed.

Referring to fig. 19-21, a positioning chute 2862 is penetratingly formed in the outer wall of the annular sleeve 2861, the positioning chute 2862 includes two vertical slots and one horizontal slot, and the two vertical slots and the horizontal slot are connected to form an n-shaped structure; a positioning rod 2901 is radially disposed on an outer circumferential surface of the stopper 290, and the positioning rod 2901 is slidably disposed in the vertical groove and the horizontal groove. When the detent lever 2901 is slid to the lower end of one of the vertical slots, the pawl 283 engages the first ratchet 281; when the positioning rod 2901 slides to the lower end of the other vertical slot, the pawl 283 engages with the second ratchet 282; when the push rod 287 is pulled up along the axial direction of the ring 2861, the positioning rod 2901 slides to the upper end of the vertical slot, and then the push rod 287 is rotated around the axis of the ring 2861, the positioning rod 2901 can slide between the two vertical slots through the horizontal slot. The positioning link 2862 effectively guides the positioning lever 2901, so that the pawl 283 can be precisely controlled to engage with the first ratchet 281 (or the second ratchet 282).

Referring to fig. 20 to 22, an extension rod 2831 protrudes from a portion of the pawl 283 facing the receiving hole 2872, and an installation groove 2832 is formed at an end of the extension rod 2831 deviating from the pawl 283; a fan-shaped limiting groove 2873 is formed in the accommodating hole 2872; a first shaft hole 2833 penetrating through the extension rod 2831 is formed in the surface, deviating from the accommodating hole 2872, of the pawl 283, and a threaded hole 2874 coaxially arranged with the limiting groove 2873 is formed in the accommodating hole 2872; the driving mechanism 28 further includes a limit plate 291 and a lock screw 292; the limit plate 291 is arranged in the mounting groove 2832, the end of the limit plate 291 radially extends to the outside of the extension rod 2831, and the end of the limit plate 291 is slidably arranged in the limit groove 2873; the locking screw 292 comprises a big head end, a threaded end and a cylindrical section arranged between the big head end and the threaded end; the cylindrical section is rotatably arranged in the first shaft hole 2833, and the threaded end is in threaded connection with the threaded hole 2874; the torsion spring 284 is sleeved on the extension rod 2831, one end of the torsion spring 284 is fixed on the pawl 283, and the other end of the torsion spring 284 is fixed in the accommodating hole 2872. As shown in fig. 20 to 21, the pawl 283 and the limit plate 291 can be simultaneously installed by the locking screw 292, and the rotatability of the pawl 283 can be realized between the first shaft hole 2833 and the cylindrical section. The extension rod 2831 can improve the contact surface between the first shaft hole 2833 and the cylindrical section, so that the stability of the pawl 283 after being installed can be improved; on the other hand, the extension bar 2831 can initially position the torsion spring 284 to reduce the difficulty of installing the torsion spring 284. In addition, when the push rod 287 is pulled up in the axial direction of the ring 2861 to separate the pawl 283 from the first ratchet 281 (or the second ratchet 282), the torsion spring 284 easily forces the pawl 283 to rotate excessively, thereby easily making it difficult for the pawl 283 to engage with the first ratchet 281 (or the second ratchet 282) again. As shown in fig. 22, under the limiting action of the limiting groove 2873 of the fan-shaped structure on the limiting plate 291 (i.e., the pawl 283), the limiting plate 291 (i.e., the pawl 283) only rotates within the range of the angle β, and the value of β is the angle that the pawl 283 rotates when being engaged with the first ratchet 281 (or the second ratchet 282) to be disengaged (as shown in fig. 23 to 24), so that the reliability that the pawl 283 is engaged with the first ratchet 281 (or the second ratchet 282) again can be ensured.

Referring to fig. 15-18, in some embodiments of the present application, the supporting frame 21 is provided with a mounting shaft 213 coaxially disposed with the fixed shaft 285, the axle center of the rear wheel 27 is provided with a second axle hole 271 therethrough, and the second axle hole 271 (through a bearing 400) is rotatably disposed on the mounting shaft 213; a hole channel 2851 is axially arranged on the fixed shaft 285 in a penetrating manner; the drive mechanism 28 further comprises a shield 293, the shield 293 comprising an inner shield 2931 and an outer shield 2932; the inner cover 2931 is coaxially disposed between the first ratchet 281 and the rear wheel 27; the outer cover 2932 is positioned on one side of the fixed shaft 285 deviating from the mounting shaft 213, a support rod 2934 protrudes from the surface of the outer cover 2932 facing the fixed shaft 285, and one end of the support rod 2934 deviating from the outer cover 2932 penetrates through a through hole 2851 and then is connected with the mounting shaft 213; the outer cover 2932 is wrapped around the inner cover 2931, a gap is left between the outer cover 2932 and the inner cover 2931, and a abdicating opening 2933 for avoiding interference with the push rod 287 is provided on the outer cover 2932. The first ratchet 281 and the inner cover 2931 can be fixed and installed at the same time outside the rear wheel 27 by the first bolt 200 (as shown in fig. 18); the support rod 2934 is inserted into the hole 2851, and the support rod 2934 is fixed to the mounting shaft 213 by the second bolt 300. Since a gap (as shown in fig. 17) is left between the inner housing 2931 rotating with the rear wheel 27 and the outer housing 2932 immovable on the mounting shaft 213, abrasion between the inner housing 2931 and the outer housing 2932 due to contact is prevented.

It should be noted that a battery may be installed on the lower surface of the supporting plate 22, and a control switch may be disposed at a suitable position (such as the supporting frame 21) to control the power on/off of the first electromagnet 45, the fourth electromagnet 74 and the fifth electromagnet 84. The second electromagnet 54 and the third electromagnet 64 are located below the bed body 1, and can be directly connected to a power supply, and a control switch is arranged at a proper position (on the side of the bed body 1) so as to control the on/off of the second electromagnet 54 and the third electromagnet 64.

The foregoing has described the principles, principal features, and advantages of the application. It will be understood by those skilled in the art that the present application is not limited to the embodiments described above, which are merely illustrative of the principles of the application, but that various changes and modifications may be made without departing from the spirit and scope of the application, and these changes and modifications are intended to be within the scope of the application as claimed. The scope of protection claimed by this application is defined by the following claims and their equivalents.

Claims

1. A self-service auxiliary bed comprises a bed body and a wheelchair body, wherein a gap is formed in the tail of the bed body; the wheelchair is characterized in that the wheelchair body comprises a support frame, a support plate, a backrest plate, a connecting plate, a pedal plate, front wheels, rear wheels and a driving mechanism for driving the rear wheels to rotate; the front wheels and the rear wheels are rotatably arranged at the lower end of the support frame, and the total number of the front wheels and the rear wheels is at least three; the supporting plate is horizontally arranged at the upper end of the supporting frame; one end of the backrest plate is rotatably arranged at one end of the supporting plate, one end of the connecting plate is rotatably arranged at the other end of the supporting plate, and one end of the pedal plate is rotatably arranged at the other end of the connecting plate; when the backrest plate, the connecting plate and the pedal plate respectively rotate to be flush with the supporting plate, the backrest plate, the supporting plate, the connecting plate and the pedal plate just fill the gap;

the self-service auxiliary bed further comprises a jacking mechanism and a first locking piece; the jacking mechanism is arranged below the notch, and the jacking mechanism is detachably connected with the backrest plate; the first locking piece comprises a fixed plate, a first mounting frame, a first bolt, a first spring and a first electromagnet; the fixed plate is arranged on the support frame, a plurality of fixed holes are arranged on the fixed plate at intervals, and the distance between the axis of each fixed hole and the rotation axis of the backrest plate is equal; the first mounting frame is arranged on the lower surface of the back board, a first mounting hole is formed in the first mounting frame, and the first lock tongue is axially slidably arranged in the first mounting hole; the first spring is arranged in the first mounting hole, and the first electromagnet is arranged on the lower surface of the backboard;

when the first electromagnet is electrified to force the first lock tongue to slide towards the inside of the first mounting hole and jack up the back board through the jacking mechanism until the first lock tongue is aligned with one of the fixing holes, the first electromagnet is powered off, and the first spring can force the first lock tongue to be inserted into the corresponding fixing hole, so that the back board is limited from rotating;

the driving mechanism comprises a first ratchet wheel, a second ratchet wheel, a pawl, a torsion spring, a fixed shaft, a sleeve and a push rod with adjustable length; the first ratchet wheel is coaxially arranged on the rear wheel, one end of the fixed shaft is coaxially arranged on the first ratchet wheel and deviates from one end of the rear wheel, and the second ratchet wheel is coaxially arranged on the other end of the fixed shaft; the sleeve is coaxially and rotatably arranged in the middle of the fixed shaft, and a circular ring sleeve radially protrudes from the sleeve; the lower end of the push rod is axially movably and rotatably arranged in the annular sleeve, a mounting part radially protrudes from the outer wall of the push rod, the mounting part is positioned above the annular sleeve, and a containing hole is formed in one end, deviating from the push rod, of the mounting part; the pawl is rotatably arranged at the outer end of the mounting part, and the torsion spring is arranged in the accommodating hole;

when the push rod is pulled upwards along the axial direction of the annular sleeve, the push rod is rotated to enable the pawl to move to the position right above the first ratchet wheel, and then the push rod is pushed downwards along the axial direction of the annular sleeve, the torsion spring can force the pawl to be meshed with the first ratchet wheel, at the moment, the push rod is shaken to enable the push rod to rotate around the axis of the fixed shaft in a reciprocating mode, and the rear wheel is forced to rotate forwards;

when the push rod is pulled upwards along the axial direction of the annular sleeve, the push rod is rotated to enable the pawl to move to the position right above the second ratchet wheel, and then the push rod is pushed downwards along the axial direction of the annular sleeve, the torsion spring can force the pawl to be meshed with the second ratchet wheel, at the moment, the push rod is shaken to enable the push rod to rotate around the axis of the fixed shaft in a reciprocating mode, and the rear wheel is forced to rotate reversely;

the driving mechanism also comprises a return spring, a sealing cover and a limiting block with a cylindrical structure; the limiting block is arranged at the lower end of the push rod and can be axially slidably and rotatably arranged in the circular sleeve; the sealing cover is suitable for being detachably arranged at one end, deviating from the sleeve, of the circular ring sleeve, a yielding hole penetrates through the sealing cover, and the push rod can be axially slidably and rotatably arranged in the yielding hole; the reset spring is arranged in the sleeve and used for forcing the limiting block to slide towards the direction close to the sleeve;

a positioning chute penetrates through the outer wall of the circular ring sleeve and comprises two vertical grooves and a horizontal groove, and the two vertical grooves and the horizontal groove are connected to form an n-shaped structure; positioning rods are radially arranged on the outer ring surface of the limiting block and are slidably arranged in the vertical grooves and the horizontal grooves;

when the positioning rod slides to the lower end of one of the vertical grooves, the pawl is meshed with the first ratchet wheel; when the positioning rod slides to the lower end of the other vertical groove, the pawl is meshed with the second ratchet wheel; when the push rod is upwards pulled up along the axial direction of the annular sleeve, the positioning rod slides to the upper end of the vertical groove, then the push rod rotates around the axis of the annular sleeve, and the positioning rod can slide between the two vertical grooves in a reciprocating mode through the horizontal grooves.

2. The self-service auxiliary bed as claimed in claim 1, wherein both ends of the connecting plate are respectively hinged to the supporting plate and the foot plate; the front end of the support frame is provided with a limiting part and a supporting part; the self-service auxiliary bed also comprises a second locking piece and a third locking piece;

the second locking piece comprises a second mounting frame, a second lock tongue, a second spring and a second electromagnet; the second mounting frame is arranged on the lower surface of the bed body, and a second mounting hole is formed in the second mounting frame; the second lock bolt is slidably arranged in the second mounting hole, and an inclined plane structure is obliquely arranged at one end, close to the tail part of the bed body, of the second lock bolt; the second spring is arranged in the second mounting hole, and the second electromagnet is arranged on the lower surface of the bed body;

the third locking piece comprises a third mounting frame, a third lock tongue, a third spring and a third electromagnet; the third mounting frame is arranged on the lower surface of the bed body, and a third mounting hole is formed in the third mounting frame; the third lock bolt is slidably arranged in the third mounting hole, and one end, close to the tail part of the bed body, of the third lock bolt is provided with a guide inclined plane in a downward inclining mode; the third spring is arranged in the third mounting hole, and the third electromagnet is arranged on the lower surface of the bed body;

when the second electromagnet is electrified to force the second lock tongue to slide towards the inside of the second mounting hole, and the third electromagnet is electrified to force the third lock tongue to slide towards the inside of the third mounting hole, under the action of gravity, the connecting plate rotates to be in contact with the limiting part, the pedal rotates to be in contact with the supporting part, and an included angle alpha between the pedal and the supporting plate is 0-30 degrees;

when the backup pad to when removing in the breach, the second electro-magnet and the third electro-magnet is in the outage state, the second spring can force the second spring bolt to the outside of second mounting hole slides, the third spring can force the third spring bolt to the outside of third mounting hole slides, the guide inclined plane can force the connecting plate and the step board rotate in proper order extremely with the backup pad parallel and level, just the second spring bolt and the third spring bolt support respectively in the connecting plate and the lower surface of step board.

3. The self-service auxiliary bed as claimed in claim 2, wherein a protrusion is provided on a lower surface of the connecting plate, the protrusion being provided with an insertion hole; the self-service auxiliary bed also comprises a fourth locking piece, and the fourth locking piece comprises a fourth mounting frame, a fourth lock tongue, a fourth spring and a fourth electromagnet; the fourth mounting frame is arranged on the limiting part, and a fourth mounting hole is formed in the fourth mounting frame; the fourth spring is arranged in the fourth mounting hole, the fourth electromagnet is arranged on the limiting part;

when the connecting plate rotates to be in contact with the limiting part, the fourth electromagnet is electrified to force the fourth bolt to slide towards the inside of the fourth mounting hole; when the connecting plate rotates to be in contact with the limiting part, the fourth electromagnet is powered off, the fourth spring can force the fourth bolt to slide towards the outside of the fourth mounting hole, and the fourth bolt can be inserted into the jack, so that the connecting plate is limited to rotate; when the supporting plate moves towards the inside of the notch, the fourth electromagnet is electrified to force the fourth bolt to be separated from the jack.

4. The self-service auxiliary bed as claimed in claim 1, wherein, the supporting plate is provided with accommodating grooves at both sides, and the inner bottom of the accommodating grooves is provided with through holes; the wheelchair body further comprises two handrail frames, each handrail frame comprises a horizontal rod and a vertical rod, the upper end of each vertical rod is connected with the horizontal rod, the lower end of each vertical rod can be arranged in the through hole in a vertically sliding mode, and a plurality of positioning holes are formed in the vertical rods at intervals;

the self-service auxiliary bed further comprises a fifth locking piece, and the fifth locking piece comprises a fifth mounting frame, a fifth lock tongue, a fifth spring and a fifth electromagnet; the fifth mounting frame is arranged on the support frame, and a fifth mounting hole is formed in the fifth mounting frame; the fifth lock tongue is slidably arranged in the fifth mounting hole, the fifth spring is arranged in the fifth mounting hole, and the fifth electromagnet is arranged on the support frame;

when the fifth electromagnet is electrified to force the fifth bolt to slide towards the interior of the fifth mounting hole, the vertical rod can be slid up and down to adjust the height of the horizontal rod, and when the horizontal rod moves to the interior of the accommodating groove, the upper surface of the horizontal rod is flush with the upper surface of the supporting plate; when the vertical rod slides up and down to the position that the fifth bolt is aligned with one of the positioning holes, the fifth electromagnet is powered off, and the fifth spring can force the fifth bolt to be inserted into the corresponding positioning hole, so that the vertical rod is limited to slide up and down.

5. The self-service auxiliary bed as recited in claim 1, wherein the jacking mechanism comprises a hydraulic cylinder, a connecting rod, a top rod and a guide wheel; the hydraulic cylinder is fixedly arranged below the notch, and the telescopic end of the hydraulic cylinder is hinged between the two ends of the ejector rod; one end of the ejector rod is connected with the lower surface of the backrest plate in a rolling mode through the guide wheel, the other end of the ejector rod is hinged to one end of the connecting rod, and the other end of the connecting rod is fixed to the outer wall of the hydraulic cylinder.

6. The self-service auxiliary bed as claimed in claim 1, further comprising a hook provided on the lower surface of the bed body, wherein the lower surface of the backboard is provided with a hanging groove; when the backrest plate, the support plate, the connecting plate and the pedal plate just fill the gap, the hook is hung in the hanging groove to limit the horizontal movement of the support plate; when the back board is jacked up by the jacking mechanism, the hanging groove is separated from the hook;

the self-service auxiliary bed also comprises a plurality of supporting blocks, and the supporting blocks are arranged on the lower surface of the bed body; when the back board, the supporting board, the connecting board and the pedal board just fill the gap, the lower surfaces of the supporting board and the back board are respectively contacted with at least one supporting block; one end of the supporting block close to the tail part of the bed body is suitable for being provided with a transition inclined plane in a downward inclined mode;

the self-service auxiliary bed also comprises two fixed baffles, two movable baffles and two L-shaped limiting strips; the two fixed baffles are respectively and vertically arranged at the tail part of the bed body and are respectively positioned at two sides of the gap; the two limiting strips are symmetrically arranged on the two fixed baffles, and one ends of the two movable baffles are respectively and rotatably arranged on the fixed baffles; when the movable baffle plate rotates downwards to be in a horizontal state, the limiting strip limits the movable baffle plate to continue rotating, and the two movable baffle plates enable the gap to be closed; when the movable baffle plate rotates upwards to a vertical state, the limiting strip limits the movable baffle plate to continue rotating.

7. The self-service auxiliary bed as claimed in claim 1, wherein an extension rod protrudes from the pawl at a position facing the receiving hole, and an installation groove is formed at an end of the extension rod away from the pawl; a limiting groove with a sector structure is arranged in the accommodating hole; a first shaft hole penetrating through the extension rod is formed in the surface, deviating from the accommodating hole, of the pawl, and a threaded hole which is coaxial with the limiting groove is formed in the accommodating hole; the driving mechanism further comprises a limiting plate and a locking screw; the limiting plate is arranged in the mounting groove, the end part of the limiting plate radially extends to the outside of the extension rod, and the end part of the limiting plate is slidably arranged in the limiting groove; the locking screw comprises a big head end, a threaded end and a cylindrical section arranged between the big head end and the threaded end; the cylindrical section is rotatably arranged in the first shaft hole, and the threaded end is in threaded connection with the threaded hole; the torsion spring is sleeved on the extension rod, one end of the torsion spring is fixed on the pawl, and the other end of the torsion spring is fixed in the accommodating hole;

the supporting frame is provided with an installation shaft which is coaxial with the fixed shaft, the axis of the rear wheel penetrates through a second shaft hole, and the second shaft hole is rotatably arranged on the installation shaft; a pore passage axially penetrates through the fixed shaft; the driving mechanism further comprises a protective cover, and the protective cover comprises an inner cover body and an outer cover body; the inner cover body is coaxially arranged between the first ratchet wheel and the rear wheel; the outer cover body is positioned on one side of the fixed shaft deviating from the mounting shaft, a supporting rod protrudes from the surface of the outer cover body facing the fixed shaft, and one end of the supporting rod deviating from the outer cover body penetrates through the pore passage and then is connected with the mounting shaft; the outer cover body wrap up in the outside of the inner cover body, the outer cover body with leave the clearance between the inner cover body, just be equipped with on the outer cover body and be used for avoiding right the push rod produces the opening of stepping down of interference.