CN200977240Y - Bed tools for patient - Google Patents

Abstract

The utility model relates to a combined type bed device (the common name is a sick bed), being used for the paralysed patients, and comprises a fixed part and a movable part. The fixed part has a common bed function, and the movable part is arranged with a deck chair, a reclining chair, a toilet, a small car and a camp bed. The fixed part has the function of facilities such as the pushing stretcher litter used even under the emergency condition, and can make the movable part to become a basic living space; Under the combined state, the bed surface comprises a fixed bed board on the fixed part, a uplifting leg putting board on the movable part, a chair surface and a leveled back rest all together and becomes a common sick bed. When the fixed part and the movable part are parted, the sick bed all kinds of functions synchronously move with the patients, and can continually provide all kinds of functions service, to avoid the new nursing work difficulty caused by the patients after leave the sick bed, effectively enlarging the patients activity space, being convenient for the interpersonal communicating and the environmental conditioning, and therefore the patients life quality is improved.

Description

The bed accessory that a kind of patient uses

Technical field

The utility model relates to the bed accessory (being commonly called as sick bed) that a kind of patient uses, specifically, is the combination type sick bed that a kind of paralytic of specializing in uses.

Background technology

The major function of sick bed is to provide recuperation and treatment service for the patient.Its version is very abundant, and general design is on one pair of bed head frame, is mounted with folding bed board and operating mechanism, is provided with corresponding guardrail; Advanced design has then increased multiple function in order to satisfy patient's life psychological need better on the basis of said structure: can change, can turn over, capable of hoisting, air cushion, water cushion, toilet seat, massage etc.; Even used high-tech, realized automatization, make traditional nursing care mode obtain very big simplification, reduced the difficulty and the intensity of nursery work, significantly improved patient's quality of life.But, when some paralytics that lie in bed all day use this class sick bed, just following problem has appearred: 1. owing to the function service that the patient is provided is limited only within on the sick bed, in case the paralytic has left sick bed, unless dispose corresponding other facilities and equipments in addition, otherwise,, still can produce the difficulty and the labor intensity of nursery work because this class patient body position moves the nursing problem that is produced; This also is the activity that has limited the patient to a certain extent, not too is beneficial to patient's physical and mental health.2. common sick bed generally only solves the problem of patient's conversion body appearance, it is dull that function shows slightly, be difficult to satisfy paralytic's specific demand, little to the difficulty and the labor intensity contribution that reduce nursery work, and high-grade product exists gap with domestic current level of consumption, and the patient who is difficult to resolve popular stratum is many bedfast old peoples' a nursing difficult problem particularly.

Summary of the invention

The purpose of this utility model provides a kind of combination type sick bed: the bed board that is integral form traditionally is decomposed into fixed bed board and removable bed board two parts, function at the facilities and equipments such as implementation stretcher that are provided with seat, chaise longue, lavatory, dolly, camp bed on the removable bed board and even use under case of emergency makes removable bed board become a basic vivosphere; Under assembled state, two parts piece together a complete bed surface, become a general sick bed, when both separate, the various functions on the sick bed continue the patient is provided the service of various functions also with the same moved further of patient, avoided the patient to leave the difficulty of the new nursery work that is produced behind the sick bed, also just enlarge their activity space effectively, made things convenient for interpersonal communication, environment to regulate, thereby their quality of life is made moderate progress.

This utility model is to achieve this end the technical scheme that is adopted to be:

The bed board that the overall profile of sick bed is rectangle is made up of fixed bed board and removable bed board amalgamation; Fixed bed board is a L-shaped platy structure spare, with the bed head frame mechanical attachment in the lining; The agent structure of removable bed board is the cuboid vehicle frame that four universal wheels are equipped with in a bottom, wherein has brake on Wai Ce two wheels, be used for guaranteeing with the fixed bed board amalgamation after the globality of whole bed surface; A square groove shape seat frame is arranged above the vehicle frame, the interior chimeric square tabular seat of having fixed of groove, the locus height of seat and the height of fixed bed board maintain an equal level; Seat is one of ingredient of combination bed surface;

On the lateral surface of vehicle frame, utilize securing member be equipped with outside side handrail, pressing close to utilize on the medial surface of fixed bed board securing member to be equipped with inboard armrest support, inboard armrest support is H shape, the vertical component at two ends is pipe fittings of two perforations, inboard movable hand rail is ∏ shape, the centre-to-centre spacing of two axle shape spares of two ends vertical component equates that with the centre-to-centre spacing of the pipe fitting of inboard armrest support two ends vertical component inboard movable hand rail is installed on the inboard armrest support by the axle shape spare of self;

The front of seat frame along on, utilize linkage that a compound square tabular structural member leg-placing plate has been installed, anterior chimeric tabular structural member footboard of small-sized rectangle in the plate, footboard is installed in the front of leg-placing plate along last by linkage; The back edge of leg-placing plate is connected with the seat frame by hinge, support link is equipped with by linkage in leg-placing plate dual-side below, support link be a kind of by two ends be drilled with the sheet shaped piece of pinhole, by the molectron that pin is coupled as one, the other end of two support link is installed in the vehicle frame bottom by linkage; Leg-placing plate has two locus with respect to seat, and the one, under the support of support link, the last plane of leg-placing plate and seat plane coexist on the horizontal level, and being in this locational leg-placing plate is one of ingredient of combination bed surface; The 2nd, after removing the support force of support link, leg-placing plate dangles under the edge, front of seat frame;

Utilize linkage that a rectangular platy structure spare backrest has been installed on the back edge of seat frame, the front of backrest is along being connected with the seat frame by hinge; Rotating shaft in the mechanism for regulating elevation angle of backrest is installed on the lower plane of backrest by support, rotating shaft is the level of state and is parallel to the lower plane and the front and rear side edge of backrest, an axle head of rotating shaft is positioned at the longitudinal centre line place of backrest, on the axle head mechanical fixation big plane ratchet sheet that has four indexing troughs perpendicular to rotating shaft, the other end of rotating shaft extends to outside the backrest outer side edges, this end mechanical fixation has the backrest regulating handle, indexing trough on the ratchet sheet under the driving of backrest regulating handle, can prop up respectively withstand on one be fixed in the vehicle frame afterbody and with the immovable anchor pin of shaft parallel on; Backrest has four kinds of locus with respect to seat, two extreme positions one wherein be vertical with seat, the 2nd, coexisting on the horizontal level with seat, being in this locational backrest is one of ingredient of combination bed surface;

Have a pyriform hole that connects with lower space on the seat, toilet device is located in the space under the seat, and main body is that a pedestal is fixedly connected at the steerable elevating mechanism of bottom of frame; Pedestal in the elevating mechanism is a flat cubical framework, and on the about side of base bottom surface frame, left and right symmetrically has welded two groups of four guidees, on two sides, inside and outside of pedestal outside, is provided with two bearing blocks symmetrically; Lifting platen in the elevating mechanism is a tabular structural member of rectangle, be positioned at the pedestal top, in the about side edge of lifting platen lower plane, weld two groups of four guidees equally symmetrically, the lifting platen bends and stretches connecting rod and is connected with pedestal by being installed on four guidees four; It is a kind of molectron that is drilled with the sheet shaped piece of pinhole, is coupled as one by pin by two ends that in the elevating mechanism four bend and stretch connecting rod, bend and stretch connecting rod and be symmetrical arranged in elevating mechanism vertical type, upper and lower side corresponds respectively to the guide on lifting platen and the pedestal; Bend and stretch connecting rod and be divided into and actively bend and stretch connecting rod and passive-type bends and stretches two kinds of patterns of connecting rod, all form by upper boom and lower beam; The upper boom size of two kinds of patterns is the same, is the sheet shaped piece that a kind of two ends are drilled with pinhole;

The active lower beam that bends and stretches connecting rod is a kind of sheet shaped piece that is drilled with three pinholes, wherein the centre-to-centre spacing in two holes is the same with the centre-to-centre spacing size in two holes of upper boom, the 3rd hole is positioned on the certain proportion position of the downward extension of the line of centres, above-mentioned two hole, a top hole connects with the following stomidium of upper boom and first hole of push-and-pull connecting rod by pin, the push-and-pull connecting rod also is the sheet shaped piece that a kind of two ends are drilled with pinhole, intermediary hole connects with pedestal by pin, the 3rd hole on the extension connects by first hole of pin and interlock connecting rod, and the interlock connecting rod also is the sheet shaped piece that a kind of two ends are drilled with pinhole;

The lower beam that passive-type bends and stretches connecting rod is the sheet shaped piece that another kind is drilled with three pinholes, the centre-to-centre spacing in two holes that wherein is positioned at two ends is the same with the centre-to-centre spacing size in two holes of upper boom, the 3rd hole is positioned at the mid point of the two hole lines of centres, a top hole of this type also connects with the following stomidium of upper boom by pin, following hole connects with pedestal by pin, and intermediary hole connects by second hole of pin and interlock connecting rod;

Four upper end holes that bend and stretch the connecting rod upper boom by pin respectively with the lifting platen on four guidees be connected movingly, the vacant hole of two push-and-pull connecting rods is connected with bearing pin movingly with two eccentric orfices on the control lever shaft;

So-called eccentric orfice is two holes that are welded on the sheet shaped piece end on the control lever shaft in parallel, and two holes equate and the coincidence of axis projection center that with respect to the eccentric throw of control lever shaft center of rotation the spacing of two sheet shaped pieces is equal to two distances of bending and stretching between the connecting rod on the same group; Control lever shaft is installed in the bearing block on the pedestal, and its design corner is 90 °, and when the handle on the control lever shaft was positioned at starting point and terminal point, eccentric orfice should be in vertical respectively and horizontal level with the line of control lever shaft center of rotation.

The bed of the also available family of the standing part of this utility model substitutes, but should be with the bed surface height adjustment to consistent with the seat height.

Obviously, this combination type sick bed of having concentrated multiple function on moveable part can not produce extra nursing difficulty, thereby enlarge the function service area of sick bed when enlarge patient's activity space.

Description of drawings

Fig. 1 is the structural representation of embodiment.

Fig. 2 is the vertical view of Fig. 1.

Fig. 3 is the left view of Fig. 1 after cross-sectional.

Fig. 4 is the structural representation of elevating mechanism in the toilet device.

Pairing zero, the component names of each label sees the following form among the figure:

Label	Title	Label	Title	Label	Title
							1	Bed head frame	10	Rotating shaft	19	Vehicle frame
2	Fixed bed board	11	The ratchet sheet	20	Inboard movable hand rail
						3	Leg-placing plate	12	Supporting pin	21	Outer side handrail
4	Footboard	13	The seat frame	22	Inboard armrest support
						5	Support link	14	Wheel	23	Passive-type bends and stretches connecting rod
6	Seat	15	Bedpan	24	The interlock connecting rod
						7	The basin lid	16	The lifting platen	25	The push-and-pull connecting rod
8	The backrest regulating handle	17	Pedestal	26	The active connecting rod that bends and stretches
						9	Backrest	18	Control lever shaft	27

The specific embodiment:

From the accompanying drawing of description as can be seen, this utility model is decomposed into fixed bed board (2) and removable bed board two parts [consulting Fig. 2] to the bed board that is integral form traditionally, its overall profile still is rectangle after both amalgamations, fixed bed board (2) is in the lining, be a L-shaped platy structure spare, with bed head frame (1) mechanical attachment; The agent structure of removable bed board is the cuboid vehicle frame (19) [consulting Fig. 1] that four universal wheels (14) are equipped with in a bottom, wherein has brake on Wai Ce two wheels (14), is used for guaranteeing to make up with fixed bed board (2) globality of back bed surface; A square groove shape seat frame (13) is arranged above the vehicle frame (19), the chimeric square tabular seat (6) of having fixed in the groove, the height of the locus height of seat (6) and fixed bed board (2) maintains an equal level; Seat (6) is one of ingredient of combination bed surface;

On the lateral surface of vehicle frame (19), utilize securing member be equipped with outside side handrail (21) [consulting Fig. 3], on the medial surface of pressing close to fixed bed board (2), utilize securing member to be equipped with inboard armrest support (22), inboard armrest support (22) is H shape, the vertical component at two ends is pipe fittings of two perforations, inboard movable hand rail (20) is ∏ shape, the centre-to-centre spacing of two axle shape spares of two ends vertical component equates that with the centre-to-centre spacing of the pipe fitting of inboard armrest support (22) two ends vertical component inboard movable hand rail (20) is installed on the inboard armrest support (22) by the axle shape spare of self; Inboard movable hand rail (20) can oscilaltion, is lower than the lower plane of fixed bed board (2) after falling, and is used for guaranteeing the planarization of the combination bed surface after the amalgamation; Removable bed board is with after fixed bed board (2) separates, and inboard movable hand rail (20) rises, and adopts general unidirectional ratchet detent mechanism that it is withstood on the inboard armrest support (22), is used for the patient and puts hands and do side direction protection;

In the front of seat frame (13) along last, utilize linkage that a compound square tabular structural member leg-placing plate (3) [consulting Fig. 1] has been installed, an anterior chimeric tabular structural member footboard of small-sized rectangle (4) in the plate, footboard (4) is installed in the front of leg-placing plate (3) along last by linkage; The back edge of leg-placing plate (3) is connected with seat frame (13) by hinge, support link (5) is equipped with by linkage in leg-placing plate (3) dual-side below, support link (5) be a kind of by two ends be drilled with the sheet shaped piece of pinhole, by the molectron that pin is coupled as one, the other end of two support link (5) is installed in vehicle frame (19) bottom by linkage; Leg-placing plate (3) has two locus with respect to seat (6), the one, under the support of support link (5), the last plane of leg-placing plate (3) and seat (6) plane coexist on the horizontal level, and being in this locational leg-placing plate (3) is one of ingredient of combination bed surface; The 2nd, behind the support force that removes support link (5), leg-placing plate (3) dangles under the edge, front of seat frame (13); Footboard this moment (4) can overturn forward 90 °;

Utilize linkage that a rectangular platy structure spare backrest (9) [consulting Fig. 1] has been installed on the back edge of seat frame (13), size and shape are similar to the so-called high back in the domestic chair; The front of backrest (9) is along being connected with seat frame (13) by hinge; Rotating shaft (10) in the mechanism for regulating elevation angle of backrest (9) is installed on the lower plane of backrest (9) by support, rotating shaft (10) is the level of state and is parallel to the lower plane and the front and rear side edge of backrest (9), an axle head of rotating shaft (10) is positioned at the longitudinal centre line place of backrest (9), on the axle head mechanical fixation big plane ratchet sheet (11) that has four indexing troughs perpendicular to rotating shaft (10), the other end of rotating shaft (10) extends to outside backrest (9) outer side edges, this end mechanical fixation has backrest regulating handle (8), indexing trough on the ratchet sheet (11) can prop up respectively and withstands on one and be fixed on vehicle frame (19) afterbody and the immovable anchor pin (12) parallel with rotating shaft (10) under the driving of backrest regulating handle (8); Backrest (9) has four kinds of locus with respect to seat (6), two extreme positions one wherein be vertical with seat (6), the 2nd, coexisting on the horizontal level with seat (6), being in this locational backrest (9) is one of ingredient of combination bed surface;

Have a pyriform hole that connects with lower space on the seat (6), pyriform hole the same [consulting Fig. 2] on the size of hole and the domestic water closet seat, toilet device is located in the space under the seat (6) [consulting Fig. 1], and main body is that a pedestal (17) is fixedly connected at the steerable elevating mechanism [consulting Fig. 4] of vehicle frame (19) bottom; Pedestal in the elevating mechanism (17) is a flat cubical framework, and on the about side of pedestal (17) bottom surface frame, left and right symmetrically has welded two groups of four guidees, on outside two sides, inside and outside of pedestal (17), is provided with two bearing blocks symmetrically; Lifting platen (16) in the elevating mechanism is a tabular structural member of rectangle, be positioned at pedestal (17) top, about side edge at lifting platen (16) lower plane, weld two groups of four guidees equally symmetrically, lifting platen (16) bends and stretches connecting rod and is connected with pedestal (17) by being installed on four guidees four; It is a kind of molectron that is drilled with the sheet shaped piece of pinhole, is coupled as one by pin by two two ends that in the elevating mechanism four bend and stretch connecting rod, bend and stretch connecting rod and be symmetrical arranged in elevating mechanism vertical type, upper and lower side corresponds respectively to the guide on lifting platen (16) and the pedestal (17); Shelved a bedpan (15) [consulting Fig. 1] on the lifting platen (16), there is one to go up the basin lid (7) that the plane has the pyriform projection on the uncovered plane of bedpan (15), after lifting platen (16) rises, basin lid (7) is fitted with the lower plane of seat (6), the pyriform bump fills that covers is in the pyriform hole of seat (6), [consult Fig. 3] when the lifting platen is fallen, basin lid (7) and bedpan (15) can pick and place from vehicle frame (19) side;

Bend and stretch connecting rod and be divided into and actively bend and stretch connecting rod (26) and passive-type bends and stretches (23) two kinds of patterns of connecting rod [consulting Fig. 4], all form by upper boom and lower beam; The upper boom size of two kinds of patterns is the same, is the sheet shaped piece that a kind of two ends are drilled with pinhole;

The active lower beam that bends and stretches connecting rod (26) is a kind of sheet shaped piece that is drilled with three pinholes, wherein the centre-to-centre spacing in two holes is the same with the centre-to-centre spacing size in two holes of upper boom, the 3rd hole is positioned on the certain proportion position of the downward extension of the line of centres, above-mentioned two hole, a top hole connects with the following stomidium of upper boom and first hole of push-and-pull connecting rod (25) by pin, push-and-pull connecting rod (25) also is the sheet shaped piece that a kind of two ends are drilled with pinhole, intermediary hole connects with pedestal (17) by pin, the 3rd hole on the extension connects by first hole of pin and interlock connecting rod (24), and interlock connecting rod (24) also is the sheet shaped piece that a kind of two ends are drilled with pinhole;

The lower beam that passive-type bends and stretches connecting rod (23) is the sheet shaped piece that another kind is drilled with three pinholes, the centre-to-centre spacing in two holes that wherein is positioned at two ends is the same with the centre-to-centre spacing size in two holes of upper boom, the 3rd hole is positioned at the mid point of the two hole lines of centres, a top hole of this type also connects with the following stomidium of upper boom by pin, following hole connects with pedestal (17) by pin, and intermediary hole connects by second hole of pin and interlock connecting rod (24);

Four upper end holes that bend and stretch the connecting rod upper boom by pin respectively with lifting platen (16) on four guidees be connected movingly, the vacant hole of two push-and-pull connecting rods (25) is connected with bearing pin movingly with two eccentric orfices on the control lever shaft (18);

So-called eccentric orfice is two holes that are welded on the sheet shaped piece end on the control lever shaft (18) in parallel, two holes equate and the coincidence of axis projection center that with respect to the eccentric throw of control lever shaft (18) center of rotation the spacing of two sheet shaped pieces is equal to two distances of bending and stretching between the connecting rod on the same group; Control lever shaft (18) is installed in the bearing block on the pedestal (17), and its design corner is 90 °, and when the handle on the control lever shaft (18) was positioned at starting point and terminal point, eccentric orfice should be in vertical respectively and horizontal level with the line of control lever shaft (18) center of rotation.When this line from horizontal level when move in the upright position, push-and-pull connecting rod (25) pulls to plumbness to the active connecting rod (26) that bends and stretches from bending state, owing to actively bend and stretch rotatablely moving of connecting rod (26) lower beam, drive interlock connecting rod (24) action, passive-type is bent and stretched connecting rod (23) also pull to plumbness from bending state, to making the entire length maximum of all bending and stretching connecting rod, lifting platen (16), bedpan (15), basin lid (7) all are on the high some position; And when this line from the upright position when horizontal level moves, then force and all bend and stretch connecting rod from plumbness break-in bending state, bending and stretching the spacing at connecting rod two ends dwindles, and makes lifting platen (16), bedpan (15), basin lid (7) reduce to the low level in the design.

Claims (1)

1. the bed accessory that patient uses has bed head frame, bed board, guardrail, and it is characterized in that: the bed board that overall profile is rectangle is made up of fixed bed board and removable bed board amalgamation; Fixed bed board is a L-shaped platy structure spare in the lining, and bed head frame mechanical attachment: the agent structure of removable bed board is the cuboid vehicle frame that four universal wheels are equipped with in a bottom, wherein has brake on Wai Ce two wheels; A square groove shape seat frame is arranged above the vehicle frame, the interior chimeric square tabular seat of having fixed of groove, the locus height of seat and the height of fixed bed board maintain an equal level; On the lateral surface of vehicle frame, utilize securing member be equipped with outside side handrail, pressing close to utilize on the medial surface of fixed bed board securing member to be equipped with inboard armrest support, inboard armrest support is H shape, the vertical component at two ends is pipe fittings of two perforations, inboard movable hand rail is ∏ shape, the centre-to-centre spacing of two axle shape spares of two ends vertical component equates that with the centre-to-centre spacing of the pipe fitting of inboard armrest support two ends vertical component inboard movable hand rail is installed on the inboard armrest support by the axle shape spare of self; The front of seat frame along on, utilize linkage that a compound square tabular structural member leg-placing plate has been installed, anterior chimeric tabular structural member footboard of small-sized rectangle in the plate, footboard is installed in the front of leg-placing plate along last by linkage; The back edge of leg-placing plate is connected with the seat frame by hinge, support link is equipped with by linkage in leg-placing plate dual-side below, support link be a kind of by two ends be drilled with the sheet shaped piece of pinhole, by the molectron that pin is coupled as one, the other end of two support link is installed in the vehicle frame bottom by linkage; Leg-placing plate has two locus with respect to seat, the one, under the support of support link, the last plane of leg-placing plate and seat plane coexist on the horizontal level, the 2nd, after removing the support force of support link, leg-placing plate dangle the front of seat frame along under; By linkage a rectangular platy structure spare backrest has been installed on the back edge of seat frame, the front of backrest is along being connected with the seat frame by hinge; Rotating shaft in the mechanism for regulating elevation angle of backrest is installed on the lower plane of backrest by support, rotating shaft is the level of state and is parallel to the lower plane and the front and rear side edge of backrest, an axle head of rotating shaft is positioned at the longitudinal centre line place of backrest, on the axle head mechanical fixation big plane ratchet sheet that has four indexing troughs perpendicular to rotating shaft, the other end of rotating shaft extends to outside the backrest outer side edges, this end mechanical fixation has the backrest regulating handle, the indexing trough on the ratchet sheet prop up withstand on one be fixed in the vehicle frame afterbody and with the immovable anchor pin of shaft parallel on; Backrest has four kinds of locus with respect to seat, two extreme positions one wherein be vertical with seat, the 2nd, coexist on the horizontal level with seat;

Have a pyriform hole that connects with lower space on the seat, toilet device is located in the space under the seat, and main body is that a pedestal is fixedly connected at the elevating mechanism of bottom of frame; Pedestal in the elevating mechanism is a flat cubical framework, and on the about side of base bottom surface frame, left and right symmetrically has welded two groups of four guidees, on two sides, inside and outside of pedestal outside, is provided with two bearing blocks symmetrically; Lifting platen in the elevating mechanism is a tabular structural member of rectangle, be positioned at the pedestal top, in the about side edge of lifting platen lower plane, weld two groups of four guidees equally symmetrically, the lifting platen bends and stretches connecting rod and is connected with pedestal by being installed on four guidees four; It is a kind of molectron that is drilled with the sheet shaped piece of pinhole, is coupled as one by pin by two ends that in the elevating mechanism four bend and stretch connecting rod, bend and stretch connecting rod and be symmetrical arranged in elevating mechanism vertical type, upper and lower side corresponds respectively to the guide on lifting platen and the pedestal; Bend and stretch connecting rod and be divided into and actively bend and stretch connecting rod and passive-type bends and stretches two kinds of patterns of connecting rod, all form by upper boom and lower beam; The upper boom size of two kinds of patterns is the same, is the sheet shaped piece that a kind of two ends are drilled with pinhole; The active lower beam that bends and stretches connecting rod is a kind of sheet shaped piece that is drilled with three pinholes, wherein the centre-to-centre spacing in two holes is the same with the centre-to-centre spacing size in two holes of upper boom, the 3rd hole is positioned on the certain proportion position of the downward extension of the line of centres, above-mentioned two hole, a top hole connects with the following stomidium of upper boom and first hole of push-and-pull connecting rod by pin, the push-and-pull connecting rod also is the sheet shaped piece that a kind of two ends are drilled with pinhole, intermediary hole connects with pedestal by pin, the 3rd hole on the extension connects by first hole of pin and interlock connecting rod, and the interlock connecting rod also is the sheet shaped piece that a kind of two ends are drilled with pinhole; The lower beam that passive-type bends and stretches connecting rod is the sheet shaped piece that another kind is drilled with three pinholes, the centre-to-centre spacing in two holes that wherein is positioned at two ends is the same with the centre-to-centre spacing size in two holes of upper boom, the 3rd hole is positioned at the mid point of the two hole lines of centres, a top hole of this type also connects with the following stomidium of upper boom by pin, following hole connects with pedestal by pin, and intermediary hole connects by second hole of pin and interlock connecting rod; Four upper end holes that bend and stretch the connecting rod upper boom by pin respectively with the lifting platen on four guidees be connected movingly, the vacant hole of two push-and-pull connecting rods is connected with bearing pin movingly with two eccentric orfices on the control lever shaft; So-called eccentric orfice is two holes that are welded on the sheet shaped piece end on the control lever shaft in parallel, and two holes equate and the coincidence of axis projection center that with respect to the eccentric throw of control lever shaft center of rotation the spacing of two sheet shaped pieces is equal to two distances of bending and stretching between the connecting rod on the same group; Control lever shaft is installed in the bearing block on the pedestal, and its design corner is 90 °, and when the handle on the control lever shaft was positioned at starting point and terminal point, eccentric orfice should be in vertical respectively and horizontal level with the line of control lever shaft center of rotation.

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