CN205814574U - A kind of self-service sliding Height-adjustable - Google Patents

Abstract

The utility model discloses a kind of self-service sliding Height-adjustable, including bedstead and mobile bed plate；Portable plate includes seat board and the backboard being hinged；The support rod mechanism including support bar it is provided with between backboard and bedstead；Support bar is provided with mobile link and is tiltedly moving the mobile terminal on slide rail and the support end being hinged on backboard；Seat board is slidably connected on a translation slide rail in the range of limiting；Being provided with a pulley block mechanism between mobile terminal and seat board, the bedstead corresponding with seat board is provided with a winding mechanism.Make backboard relative support linkage produce a start angle by seat board sliding forward, solve the technical problem that the little and required power of support bar initial angle is bigger.Seat board sliding forward makes wind mechanism move relative to after seat board, and the palmistry of self-service user is in one all the time and optimal makes power position wind.Technical solutions of the utility model bring the facility of self-service regulation to non-serious symptom bed person, also give the work burden alleviating medical personnel and family members.

Description

A kind of self-service sliding Height-adjustable

Technical field

This utility model relates to one and has mobile bed plate, the casual health bed of backboard adjustable angle.Particularly to one Planting can be by the sick bed of non-serious symptom bed person self-service adjustment backboard angle.

Background technology

Along with the progress of society, growth in the living standard, the bed for casual health or for patient the most all possesses and has Backboard angle adjustable function.The usual rocking bar by being arranged on tailstock of this backboard regulation uses screw mechanism to be carried out by other people Help is carried out.This governor motion is extremely inconvenience for the people of bed, even if in hospital, nurse is not to keep all the time Before sick bed.Thirsting for backboard for having the people of the bed of a capability can self-service regulatory function.Prior art goes out Show the multiple bed with this function.Chinese utility model patent if notification number is CN201299728 discloses a kind of stopping Not busy bed, this is that one both can make bed body swing, and the head of a bed can be made again to adjust the electric leisure aid-sleeping bed of angle.This technical scheme bag Including single head board, lathe bed plate and be positioned at the bed body rack below single head board and lathe bed plate, it is described single head board and bed Hinge bolt it is provided with between body；This list head board, lathe bed plate lower end are provided with steelframe；Steelframe is provided with support pulley；With this support The corresponding bed body rack of pulley is provided with slideway；The steelframe of single head board one end is provided with fixed support；Described fixing Frame is provided with depression bar motor away from steelframe one end；The pressure shaft of this depression bar motor is connected, in described fixed support with single head board Portion is hinged with connecting rod one end；Motor it is provided with in bed body rack；This motor passes through belt, is connected with belt wheel and connecting rod belt wheel, described Connecting rod belt wheel is connected with the other end of described connecting rod.It addition, notification number is the Chinese utility model patent of CN201356302Y Disclose a kind of Full-automatic multifunctional bed, including two segments combined movable bed surface, bed body, programme-control with single-chip microcomputer as core Device and driving electrical equipment, for being flexibly connected between two segments combined movable bed surface；Described leading portion bed surface is laterally fixed with a location Axle, axle two ends is movably arranged on bed body arranged on left and right sides side relevant position；The tail end of described back segment bed surface and slave drive system Transmission band one end connects；The transmission band other end is through fixed pulley group, and be strained and fixed forward and backward two sections of bed surface joint portions, leading portion The end of bed surface, first half section bed surface head is connected with active driveline.The China also having notification number to be CN203154141U is practical New patent discloses a kind of intelligence work and rest bed returning Force system based on strong power, including bed body, fixing lathe bed, movable lathe bed and Motor, described fixing lathe bed, movable lathe bed are arranged in described bed body, are pacifying under the described bed body of described movable lathe bed homonymy Equipped with described motor, below the junction of described fixing lathe bed and movable lathe bed, it is provided with angle steel.The regulation of these backboards is all It is achieved by motor driving.Therefore, by controlling to switch and can be realized regulation by the people's Self-operating liied in bed.But owing to adopting Using electro-mechanical adjustment mechanism so that the structure of governor motion is the most complicated, the manufacturing cost of bed is substantially increased, and this cures for great majority Institute or individual being difficult to per capita are born.Moreover, owing to have employed electromechanical mechanism, the backboard angular adjustment limited to a certain extent The popularization that function uses, brings much inconvenience under conditions of short of electricity or in the date of power failure the patient of bed.In order to Solving this problem, notification number is the single bed that the Chinese utility model patent of CN203885742U discloses a kind of improvement.It Being pulled the deformation of two groups of tripods to prop up by wind rotating spindle by steel wire rope, bed board realizes bed board turns up change to adapt to The bed demand of patient with severe symptoms.But when the tripod in this technical scheme deforms, initial angle is close to zero, needs the biggest power, Using hand main shaft to there is the biggest difficulty in the case of Gai, the self-service adjustment of bed person be difficult to.It addition, this technical scheme there is also Such a problem: when patient lays flat on one's back, hands manipulator's rocking handle may be an optimum position, and when bed board back part to When vertical direction folds, wind phase opponent move in head of a bed direction, and hands becomes unfavorable to the force application location of wind, thus Cause and self-service be more difficult to.

Utility model content

The technical problems to be solved in the utility model is to provide a kind of self-service sliding Height-adjustable, and it is deposited for prior art Technological deficiency, by a support rod mechanism, backboard carried out angular adjustment, and makes backboard relatively prop up by the sliding of seat board Support rod mechanism produces a start angle, thus it is little to efficiently solve support bar initial angle, and initial required power relatively greatly cannot be real The technical problem of existing self-service regulation.It addition, seat board sliding forward makes backboard make wind mechanism phase while rotating lifting Moving forward seat board, the palmistry of self-service user is in one all the time and optimal makes power position wind.This utility model technology Scheme brings the facility of self-service regulation to non-serious symptom bed person, also gives the work burden alleviating medical personnel and family members.

The technical solution of the utility model is: a kind of self-service sliding Height-adjustable, including bedstead and mobile bed plate；Described work Dynamic plate includes seat board and backboard；Described backboard is hinged with seat board；It is provided with between described mobile bed plate and bedstead and at least includes one The support rod mechanism of support bar；Described support bar is provided with a mobile terminal and being mobily connected on an oblique shifting slide rail and is hinged on A support end on described backboard；Described seat board is slidably connected on a translation slide rail in the range of limiting；In described mobile terminal And being provided with a pulley block mechanism between seat board, the bedstead corresponding with described seat board is provided with the volume of a described pulley block mechanism of traction Around mechanism.Make backboard relative support linkage produce a start angle by seat board sliding forward, solve support bar and rise The technical problem that the little and required power in beginning angle is bigger.It addition, seat board sliding forward makes wind mechanism move relative to after seat board, make self-service The palmistry of user is in one all the time and optimal makes power position wind.Technical solutions of the utility model lie in bed to non-serious symptom Person brings the facility of self-service regulation, also gives the work burden alleviating medical personnel and family members.

As the preferred technical scheme of one, described oblique shifting slide rail is gradually increasing setting in from the head of a bed to tailstock direction.Logical The slide rail that tiltedly moves crossing this structure makes the mobile terminal of support bar, support end and seat board form a triangular structure, and in mobile terminal And pulley block mechanism is set between seat board so that pulley block mechanism to arrange structure more succinct, better reliability, to sliding The assembling of wheels is put convenient more.Specifically, this tiltedly move slide rail tiltedly move chute be provided with the initial segment of a level, one tiltedly To ascent stage and the stop segment of a level.When mobile terminal is also in the initial segment, winding mechanism pulls resistance to mobile terminal Power is relatively big, and pulls resistance less seat board so that mobile terminal now becomes a rotating fulcrum, and the rear shifting of seat board promotes Backboard produces an initial angle.And when mobile terminal arrives stop segment, tiltedly moving chute tends to level, thus decrease winding mechanism Pull strength and make support bar more reliably stop.

In order to prevent because the structural failure of support rod mechanism causes support bar to overturn in head of a bed direction in rising way, make Become backboard to promote unsuccessfully, as a kind of optimal technical scheme, described bedstead is provided with a restriction described support bar rotational angle Spacing guide wheel.This position-limit mechanism makes described support bar horizontal sextant angle in moving process less than 90.

As the preferred technical scheme of one, described pulley block mechanism at least includes the movable pulley being arranged on described mobile terminal Group and the variable pulleys group being arranged on described seat board.Cunning is tiltedly moved with the most S-shaped by running block and variable pulleys group Rail coordinates, it is achieved running block and the sequentially-operating of variable pulleys group, makes backboard reliably be risen and make angular adjustment.But In other technical scheme, it is possible to be provided with multiple fixed pulley on bedstead and running block or variable pulleys group travel direction are adjusted, To reach optimal raising efficiency.

As a kind of concrete technical scheme, described support bar is two, is symmetrical set in bedstead both sides；Two shiftings Connecting between moved end and move axostylus axostyle, described assembly pulley is arranged on this and moves between axostylus axostyle and seat board.The support bar of this structure Mechanism can preferably balance the lifting of backboard, and makes pulley block mechanism and winding mechanism preferably be hidden.

In order to make, user is more laborsaving carries out self-service regulation, and as a kind of optimal technical scheme, described support bar is two, It is symmetrical set in bedstead both sides；Between said two support end, it is provided with a support axostylus axostyle, is arranged with on axostylus axostyle point supporting The torque spring not being connected between support bar and backboard；The setting of described torque spring makes described support bar tend to support Axostylus axostyle is that rotating shaft is closed up to the bottom of described backboard.

This utility model makes backboard relative support linkage produce a start angle by the sliding of seat board, and by setting The balanced controls put, efficiently solve the technical problem that the little and required power of support bar initial angle is bigger.It addition, seat board sliding forward Make wind mechanism move relative to after seat board, make the palmistry of self-service user that wind to be in one all the time and optimal make power position Put.Technical solutions of the utility model bring the facility of self-service regulation to non-serious symptom bed person, also give alleviate medical personnel and The work burden of family members.Owing to technical solutions of the utility model are without driven by power, its suitability is strong, and simple in construction can Lean on, there is preferable economy and practical value.

Accompanying drawing explanation

Fig. 1 is the structural representation of this utility model embodiment one.

Fig. 2 is the structural representation of this utility model embodiment one, shows bedstead polycrystalline substance in figure.

Fig. 3 is the left view of this utility model embodiment one.

Fig. 4 is the A-A sectional view of Fig. 3, shows pulley block mechanism middle pulley group and hauling rope attachment structure in figure.

Fig. 5 is the B-B sectional view of Fig. 3, shows the position-limited wheel position limiting structure to support bar in figure.

Fig. 6 (a)～the use operation chart that Fig. 6 (c) is this utility model embodiment one.

Wherein, bedstead 1, front back frame 11, rear back frame 12, longeron 13, crosspiece 14, mobile bed plate 2, backboard 21, seat board 22, Seat board support 221, seat board axostylus axostyle 222, lower limb header board 23, lower limb back plate 24, rear board mount 241, back plate axostylus axostyle 242, support bar Mechanism 3, support bar 31, mobile terminal 311, support end 312, mobile axostylus axostyle 32, support axostylus axostyle 33, tiltedly move slide rail 34, tiltedly move chute 341, the initial segment 342, ascent stage 343, stop segment 344, bearing pin 345, position-limit mechanism 35, position-limited wheel 351, stopper slot 352, first Confined planes the 353, second confined planes 354, translation slide rail 4, seat board chute 41, back plate chute 42, pulley block mechanism 5, running block 51, variable pulleys group 52, pulley 1, pulley 2 54, support plate 55, hauling rope the 56, first winding mechanism the 6, first winch spool 61, First rocking handle mechanism 62, second winding mechanism the 7, second winch spool the 71, second rocking handle mechanism 72, back plate movable pulley 8, balancing machine Structure 9, torque spring 91.

Detailed description of the invention

The utility model will be further described with embodiment below in conjunction with the accompanying drawings.

Seeing Fig. 1 and Fig. 2, a kind of self-service sliding Height-adjustable, including bedstead 1, the mobile bed plate 2 that is arranged on bedstead 1 And the support rod mechanism 3 being arranged between bedstead 1 and mobile bed plate 2.This bedstead 1 include the front back frame 11 front and back arranged and after lean on Frame 12 and two longerons 13 being connected in parallel between front back frame 11 and rear back frame 12 both sides.It is provided with between two longerons 13 Three crosspieces 14.Mobile bed plate 2 includes that the seat board 22 that backboard 21 and backboard 21 are hinged is hinged down with seat board 22 successively Limb header board 23 and the lower limb back plate 24 being hinged with lower limb header board 23.Wherein lower limb header board 23 and lower limb back plate 24 constitute lower limb and prop up Fagging.

Backboard 21 carries out promoting rotating relative to seat board 22 by this support rod mechanism 3 makees angular adjustment.This support rod mechanism 3 Slide rail 34 is tiltedly moved including a support bar 31 and.A pulley block mechanism 5 it is provided with between support bar 31 and seat board 22.This support bar 31 are provided with support end 312 and a mobile terminal 311.Wherein, support end 312 is hinged on backboard 21, and mobile terminal 311 is by a pin Axle 345 is mobily connected in and tiltedly moves in slide rail 34.Seat board 22 is connected to a translation slide rail 4 by bearing pin 345 horizontally moveablely Seat board chute 41 in.Pull mobile terminal 311 and the seat board 22 of support bar 31 during pulley block mechanism 5 action, make mobile terminal 311 exist Tiltedly the path of shifting slide rail 34 is moved under limiting and seat board 22 moves under the path translating slide rail 4 limits.Hauling block group mechanism 5 First winding mechanism 6 of work is arranged on bedstead 1 and is positioned the position corresponding with seat board 22, and the reach of seat board 22 makes the First rocking handle mechanism 62 of one winding mechanism 6 moves in after relative seat board.

In the present embodiment, this translation slide rail 4 and the oblique slide rail 34 that moves are two.This translation slide rail 4 and tiltedly shifting slide rail 34 It is arranged on the both sides of bedstead 1 respectively.This tiltedly moves slide rail 34 and includes that one tiltedly moves chute 341 and the pin being arranged on mobile terminal 311 Axle 345.This tiltedly moves chute 341 and is gradually increasing structure in by the head of a bed to tailstock.In the present embodiment, this translation slide rail 4 and tiltedly shifting Slide rail 34 is in being independently arranged, but in other embodiments, translation slide rail 4 can be structure as a whole with tiltedly shifting slide rail 34.This tiltedly moves cunning Groove 341 includes the initial segment 342, ascent stage 343 and a stop segment 344.In the present embodiment, support rod mechanism 3 includes one The mobile axostylus axostyle 32 to the support bar 31 being symmetrical set and being connected between two mobile terminals 311 and two support ends Support axostylus axostyle 33 between 312.The support end 312 of this support bar 31 is substantially hinged on the midpoint before and after backboard 21.When backboard 21 When being in horizontal original position, the mobile terminal 311 of this support bar 31 is generally in the initial segment 342 tiltedly moving chute 341, and when the back of the body When plate 21 turns to substantially become 90 degree, this mobile terminal 311 is generally in the stop segment 344 tiltedly moving chute 341.Pulley block mechanism 5 It is arranged between mobile axostylus axostyle 32 and seat board 22.Under seat board 22, be provided with a pair seat board support 221, between be provided with a seat board axle Bar 222.The pulley block mechanism 5 junction on seat board 22 is this seat board axostylus axostyle 222.

In order to prevent because structure failure or the operation of support rod mechanism 3 surprisingly cause support bar 31 in bed in rising way The upset of head direction, causes backboard 21 to promote failure.This situation occurs at the moving resistance when seat board 22 starts more than mobile When holding the moving resistance of 311, support bar 31 rising is mobile arrives final position prior to seat board 22, and the reach of seat board 22 can make to prop up Strut 31 overturns forward with mobile terminal 311 for rotary shaft, moves can to seat board 22 simultaneously and produce bigger resistance, thus cause the back of the body Plate 21 promotes failure.Therefore, bedstead 1 is provided with the position-limit mechanism 35 of restriction described support bar 31 rotational angle, contributes to Solve this technical problem.In the present embodiment, this position-limit mechanism 35 is one to be arranged on direction on front side of support bar 31 and be arranged on bed A position-limited wheel 351 on frame 1.

Seeing Fig. 3 ~ Fig. 5, this pulley block mechanism 5 includes being articulated in the running block 51 in the middle of mobile axostylus axostyle 32 and seat board axle Variable pulleys group 52 in the middle of bar 222.Variable pulleys group 52 in this utility model refers to when seat board 22 is present by bearing pin 345 When can move in plate chute 41, this assembly pulley is running block, and when seat board 22 should when seat board chute 41 terminal stops mobile Assembly pulley is fixed pulley group.In the present embodiment, this running block 51 and variable pulleys group 52 all include in the cunning front and back arranged Take turns one 53 and pulley 2 54, and, its middle pulley 1 all with the drive-connecting shaft of its place assembly pulley in being coaxially disposed, pulley 2 54 All by the pivot joint of a pair support plate 55.This pulley block mechanism 5 carries out drawing work by the first winding mechanism 6.This first up-coiler Structure 6 includes the first winch spool 61 being positioned at below seat board 22 and is arranged on the first rocking handle mechanism 62 outside bedstead 1.This first Rocking handle mechanism 62 is provided with one first self-locking mechanism (not shown).This first self-locking mechanism uses ratchet machine of the prior art Structure and clutch (not shown).When the first winding mechanism 6 carries out promoting winding to backboard 21, clutch makes ratchet machine Structure is combined with rocking handle, produces unidirectional winding effect；And when backboard 21 need to decline, clutch makes rocking handle take off with ratchet mechanism Open, make backboard 21 decline under gravity.

In the present embodiment, the hauling rope 56 of this first winding mechanism 6 is stretched towards head of a bed direction for 61 from the first winch spool Going out, the pulley 1 of follow-up pulley group 51 is walked around pulley 1 from bottom to top and is walked around variable pulleys group 52 the most from the top down successively Pulley 1, then walk around the pulley 2 54 of running block 51 from bottom to top, then walk around the pulley of variable pulleys group 52 from the top down 2 54, finally it is fixed on the support plate of running block 51.Five sections of hauling ropes are had, in variable cunning on the running block 51 of the present embodiment Four sections of hauling ropes are had on wheels 52.Therefore, the pull strength in the present embodiment at least can be with laborsaving five times.Due to of the present utility model Technical scheme when initial lifting backboard 21 seat board 22 slidably, and the actually upper body moiety by weight of bed person and backboard 21 It is the least that weight acts on horizontal component on seat board 22, and therefore, required initial power is the least so that self-service lifting regulates backboard angle It is achieved.

The beneath board mount 241 after back edge is provided with a pair of lower limb back plate 24, sets between this is to rear board mount 241 There is a back plate axostylus axostyle 242.Lower limb back plate 24 is mobily connected in translation slide rail 4 by the bearing pin 345 on this back plate axostylus axostyle 242 In one back plate chute 42.When the back plate axostylus axostyle 242 of lower limb back plate 24 moves along back plate chute 42 so that lower limb back plate 24 with under Limb header board 23 rotates relative to seat board 22 and upwards arches upward, and forms the support adjustment structure for lower limb.Pivot joint on back plate axostylus axostyle 242 There is a back plate movable pulley 8.Bedstead 1 is provided with parallel with the first winding mechanism 6 and that structure is identical the second winding mechanism 7.The The hauling rope 56 of two winding mechanisms 7 from the second winch spool extend back for 71 from back plate movable pulley 8 walk around from bottom to top back plate move Pulley 8 extends on the crosspiece 14 being fixed in the middle of bedstead 1 further along.

See Fig. 6 (a)～Fig. 6 (c), when the wind mechanism 62 of hand first winding mechanism 6 winds hauling rope 56, lead Straw line 56 produces active force to mobile axostylus axostyle 32 and seat board axostylus axostyle 222 by pulley block mechanism 5 simultaneously.Due to shifting axle time initial Bar 32 resistance of the initial segment 342 in tiltedly shifting chute 341 is relatively big, and the resistance that seat board axostylus axostyle 222 is in seat board chute 41 is less, Seat board 22 starts to move forward.Owing to backboard 21 is supported bar 31 and the restriction of seat board 22 simultaneously, when seat board 22 moves forward Time so that backboard 21 is rotated up as fulcrum and centered by the jointed shaft of seat board 22 with mobile terminal 311.And when seat board 22 moves Stopping is limited by seat board chute 41 mobile, now, because backboard 21 has rotated an angle, to mobile axostylus axostyle after one segment distance The drag reduction of 32, simultaneously because the variable pulleys group 52 being articulated on seat board axostylus axostyle 222 is changed into fixed pulley group, the first volume around The pull strength of mechanism 6 all acts on mobile axostylus axostyle 32 so that mobile terminal 311 rises along the path tiltedly move chute 341 restriction, Easily realize the self-service regulation of backboard 21 angle.

User can make lower limbs support pad easily arch upward as desired by the winding traction of the second winding mechanism 7.

Technical solutions of the utility model, in order to reduce the dynamics of self-service regulation further, are provided with balanced controls 9.This balance Mechanism 9 includes torque spring, extension spring, stage clip or gas support spring mechanism.In the present embodiment, these balanced controls 9 prop up for being set in Torque spring 91 on support axostylus axostyle 33.Similarly, on back plate axostylus axostyle 242 also can this torque spring sheathed, prop up reducing lower limb The lifting force of fagging.In the present embodiment, this torque spring 91 is two, be symmetrical set backboard 21 and support bar 31 it Between.

Specific embodiment is to be more clearly understood that this utility model, is not intended as the one to this utility model right Limit, on the premise of without departing from this utility model objective, can have various change.As support bar can be arranged on shifting In the middle of moving axis bar and support axostylus axostyle, mobile terminal is by a fork configuration and mobile axostylus axostyle pivot joint；Tiltedly moving slide rail also can be by before backward In being gradually increasing setting, and one fixed pulley is set in bedstead front end again carries out commutation etc..All these to described art people The obvious amendment of member is included within the scope of present claims.

Claims (10)

1. a self-service sliding Height-adjustable, including bedstead and mobile bed plate；Described portable plate includes seat board and backboard；The described back of the body Plate is hinged with seat board；It is characterized in that: between described mobile bed plate and bedstead, be provided with the support bar at least including a support bar Mechanism；Described support bar is provided with a mobile terminal and being mobily connected on an oblique shifting slide rail and is hinged on described backboard Support end；Described seat board is slidably connected on a translation slide rail in the range of limiting；It is provided with between described mobile terminal and seat board One pulley block mechanism, the bedstead corresponding with described seat board is provided with the winding mechanism of a described pulley block mechanism of traction.

Self-service sliding Height-adjustable the most according to claim 1, it is characterised in that: described oblique shifting slide rail in from the head of a bed to bed Tail direction is gradually increasing setting.

Self-service sliding Height-adjustable the most according to claim 2, it is characterised in that: on described bedstead, it is provided with a restriction institute State the spacing guide wheel of support bar rotational angle.

4. according to the self-service sliding Height-adjustable described in claim 1 or 2 or 3, it is characterised in that: described pulley block mechanism is at least Including the running block being arranged on described mobile terminal and the variable pulleys group being arranged on described seat board.

5. according to the self-service sliding Height-adjustable described in claim 1 or 2 or 3, it is characterised in that: described support bar is two, It is symmetrical set in bedstead both sides；Connecting between two mobile terminals and move axostylus axostyle, described assembly pulley is arranged on this and moves Between axostylus axostyle and seat board.

Self-service sliding Height-adjustable the most according to claim 4, it is characterised in that: described support bar is two, symmetrically It is arranged on bedstead both sides；Between two mobile terminals connect move axostylus axostyle, described assembly pulley be arranged on this move axostylus axostyle and Between seat board.

7. according to the self-service sliding Height-adjustable described in claim 1 or 2 or 3, it is characterised in that: described support bar is two, It is symmetrical set in bedstead both sides；Between said two support end, it is provided with a support axostylus axostyle, is arranged with on axostylus axostyle point supporting The torque spring not being connected between support bar and backboard；The setting of described torque spring makes described support bar tend to support Axostylus axostyle is that rotating shaft is closed up to the bottom of described backboard.

Self-service sliding Height-adjustable the most according to claim 4, it is characterised in that: described support bar is two, symmetrically It is arranged on bedstead both sides；Between said two support end, it is provided with a support axostylus axostyle, connects respectively supporting to be arranged with on axostylus axostyle Torque spring between support bar and backboard；The setting of described torque spring makes described support bar tend to support axostylus axostyle Rotating shaft is closed up to the bottom of described backboard.

Self-service sliding Height-adjustable the most according to claim 5, it is characterised in that: described support bar is two, symmetrically It is arranged on bedstead both sides；Between said two support end, it is provided with a support axostylus axostyle, connects respectively supporting to be arranged with on axostylus axostyle Torque spring between support bar and backboard；The setting of described torque spring makes described support bar tend to support axostylus axostyle Rotating shaft is closed up to the bottom of described backboard.

Self-service sliding Height-adjustable the most according to claim 6, it is characterised in that: described support bar is two, symmetrically It is arranged on bedstead both sides；Between said two support end, it is provided with a support axostylus axostyle, connects respectively supporting to be arranged with on axostylus axostyle Torque spring between support bar and backboard；The setting of described torque spring makes described support bar tend to support axostylus axostyle Rotating shaft is closed up to the bottom of described backboard.