CN209361248U

CN209361248U - A kind of medical recovery crutch

Info

Publication number: CN209361248U
Application number: CN201821955982.XU
Authority: CN
Inventors: 林涌波; 夏建明
Original assignee: Individual
Current assignee: Individual
Priority date: 2018-11-26
Filing date: 2018-11-26
Publication date: 2019-09-10
Anticipated expiration: 2028-11-26

Abstract

The utility model belongs to field of medical technology, more particularly to a kind of medical recovery crutch, it includes handrail, mobile jib, the first Zhi Cha mechanism, the second Zhi Cha mechanism and third Zhi Cha mechanism etc., and wherein mobile jib is mounted at the lower end surface center of handrail, and the upper surface of mobile jib and the lower end surface of handrail are connected；After first Zhi Cha mechanism, the second Zhi Cha mechanism and third Zhi Cha mechanism shrink, the occupied space very little of institute, so that the walking to patient does not constitute obstacle；When encountering broken terrain, first Zhi Cha mechanism, the second Zhi Cha mechanism and the fixed length difference of third Zhi Cha mechanism, so that crutch is in a vertical state on the whole, and then guarantee the balance of the patient by crutch, avoid patient from should be body imbalance and fall down and cause secondary injury.

Description

A kind of medical recovery crutch

Technical field

The utility model belongs to field of medical technology more particularly to a kind of medical recovery crutch.

Background technique

The type of the crutch of medical field application traditional at present has single leg crutch, single leg that auxiliary leg crutch and seat is added to turn Cane；Although single leg crutch, using light, single leg of single leg crutch makes crutch unstable to the support of patient, and patient is easy It falls down and causes secondary injury；Single leg adds the auxiliary occupied space of leg crutch excessive, forms obstacle to the action of patient, is unfavorable for Patient's move freely, and then influences the quick recovery of patient；Although seat crutch can provide the function of patient's seat, Its weight is bigger, and patient is laborious when walking by it, and prolonged use meeting is unfavorable for body so that patient is easy tired The rehabilitation of body.

The utility model design a kind of medical recovery crutch solve the problems, such as it is as above.

Utility model content

To solve drawbacks described above in the prior art, the utility model discloses a kind of medical recovery crutch, it be use with Lower technical solution is realized.

In the description of the present invention, it should be noted that the indicating positions such as term "inner", "lower", "upper" or position Set relationship be orientation based on the figure or positional relationship or the utility model product using when the side usually put Position or positional relationship, it is only for it is convenient for description the utility model and simplifies description, rather than indication or suggestion meaning Device or element must have a particular orientation, constructed or operated with specific orientation, therefore should not be understood as practical new to this The limitation of type.In addition, term " first ", " second " etc. are only used for distinguishing description, it is not understood to indicate or imply relatively heavy The property wanted.

A kind of medical recovery crutch, it is characterised in that: it includes handrail, mobile jib, the first cunning chamber, L-type sliding slot, the second cunning Chamber, the first bar slot, the second bar slot, first gear slot, drive ring, circular groove, the first annular groove, link block, ring gear, connecting cylinder, limit Sliding slot, the first positioning ring, the first fixing seat, rod aperture, the 4th gear, threaded hole, the second annular groove, third annular groove, the second positioning ring, Cylinder axis, the 5th gear, screw rod, fixed ring, trunnion, the second fixing seat, first gear, top plate, mandril, guide block, the first rack gear, the One Zhi Cha mechanism, the second Zhi Cha mechanism, third Zhi Cha mechanism, wherein upper end is provided with the sliding chamber of cylindrical first in mobile jib；Mobile jib L-type sliding slot is provided on the periphery of upper end, and L-type sliding slot is communicated with the first sliding chamber；Cylinder is provided at lower end in mobile jib The second sliding chamber；The first bar slot is provided at the upper surface center of second sliding chamber, and the first bar slot is communicated with the first sliding chamber；Second is sliding Second bar slot there are three circumferentially equably being opened on the inner headed face of chamber, and three the second bar slots are communicated with the cylinder of mobile jib；Each The median plane of second bar slot all passes through the central axis of mobile jib；First tooth there are three circumferentially equably being opened on the cylinder of mobile jib lower end Race, and each first gear slot is communicated with the second sliding chamber；Three first gear slots be located at by three the second bar slots and It is corresponded respectively with three the second bar slots；Side wall in each second bar slot and the side wall in corresponding first gear slot are flat Row；First rack gear is fixedly installed in each first gear slot；There are two lead for circumferential equably installation on the cylinder of mobile jib Block, and two guide blocks are located at the top of the second bar slot；Mobile jib is mounted at the lower end surface center of handrail, and the upper surface of mobile jib with The lower end surface of handrail is connected；The lower end surface of drive ring is provided with circular groove；The first annular groove is circumferentially provided on the inner wall of circular groove；Drive ring Nesting is mounted on mobile jib at L-type sliding slot；First positioning ring is nested on mobile jib and is located in the first annular groove；The inner circle of connecting cylinder Limit sliding chutes there are two circumferentially equably being opened on face, and two limit sliding chutes are parallel with the length direction of connecting cylinder；Two limits Sliding slot is communicated with the lower end surface of connecting cylinder；The cunning that connecting cylinder passes through two guide blocks in two limit sliding chutes and mobile jib thereon Dynamic cooperation is nested in the lower section on mobile jib and being located at drive ring；The upper end of connecting cylinder passes through the circular groove of drive ring lower end and first and determines The lower end surface of position ring is connected；Fixed ring is nested in mobile jib lower end and the lower end surface of connecting cylinder and is connected；Fixed ring is located at the second bar slot Top；The inner headed face of ring gear is the flank of tooth；Ring gear is located in the first sliding chamber, and the central axis of ring gear and the first sliding chamber or mobile jib Central axis be overlapped；Ring gear is connected by the link block and drive ring for crossing L-type sliding slot；The upper surface of first fixing seat one end It is provided with rod aperture；The lower section of first fixed seating ring gear in the first sliding chamber on mobile jib, and it is not provided with rod aperture in the first fixing seat One end pass through L-type sliding slot and connecting cylinder and be connected；The median plane of first fixing seat is by the first sliding chamber or the section circle half of mobile jib Diameter, and the central axis of the rod aperture in the first fixing seat is overlapped with the central axis of the first sliding chamber or mobile jib.

The threaded hole of perforation is provided at one end face center of the 4th gear；One end face upper screwed hole of the 4th gear Threadingly hole circumference is provided with the second annular groove in outside；The bottom of second sliding slot is provided with third annular groove；Second positioning ring is embedded in the 4th tooth In third annular groove in wheel；Coaxial one end is inserted into the second annular groove in the 4th gear and is connected with the second positioning ring；4th tooth Wheel is mounted on the upper surface of the first fixing seat by cylinder axis, and the 4th gear is located in ring gear；Threaded hole on 4th gear Central axis is overlapped with the central axis of the rod aperture in the first fixing seat；5th gear is mounted on the upper of the first fixing seat by axis On end face, and the 5th gear is located in ring gear；5th gear is meshed with the 4th gear and ring gear simultaneously；Screw rod is embedded in mobile jib The first bar slot in, and the both ends of screw rod are located in the first sliding chamber and the second sliding chamber；It is located in the first sliding chamber on screw rod One end sequentially passes through the threaded hole on rod aperture, cylinder axis and the 4th gear of screw-in in the first fixing seat；It is sliding to be located at second on screw rod One end in chamber is fixedly installed with top plate；Inclined mandril there are three circumference array, and three are installed on the lower end surface of top plate The one end not connecting with top plate on mandril is each passed through three the second bar slots on mobile jib；First Zhi Cha mechanism, second wooden fork machine Structure and third Zhi Cha mechanism are mounted on the lower end surface of fixed ring, and first wooden fork machine each by two hinged therewith trunnions Structure, the second Zhi Cha mechanism and third Zhi Cha mechanism are distributed along fixed ring lower end surface circumference array；First Zhi Cha mechanism, second wooden fork Mechanism and third Zhi Cha mechanism are matched with the one end for stretching out the second sliding chamber on three mandrils respectively；Three the second fixing seats are by circle All arrays are mounted on the lower end surface of fixed ring, and three the second fixing seats are located at the top of three first gear slots；Three A first gear is separately mounted in three the second fixing seats each by axis；Three first gears are each passed through corresponding first While gear grooved is meshed with corresponding first rack gear again respectively with the first Zhi Cha mechanism, the second Zhi Cha mechanism and third branch wooden fork Mechanism matches.

Above-mentioned first Zhi Cha mechanism, the second Zhi Cha mechanism are identical with the internal structure of third Zhi Cha mechanism；For For one Zhi Cha mechanism, it includes telescopic rod, is driven notch, agrees with back-shaped notch, third bar slot, second gear slot, rack gear cunning Slot, reseting groove, pressure spring plate, reset spring, second gear, half round block, half slot, the second rack gear, swivel pin, third gear, Three rack gears, telescopic, telescopic chute, limiting slot, support spring, wherein telescopic rod one end is provided with transmission notch；It is driven the bottom of notch Portion is provided with the third bar slot along the perforation of length of telescopic bar direction；The inner wall of third bar slot is circumferentially provided with reseting groove；On telescopic rod not What the one end for being provided with transmission notch was provided with certain length agrees with back-shaped notch；The one end for agreeing with back-shaped notch is provided on telescopic rod The second gear slot of certain depth is provided on end face, and second gear slot is laterally communicated with third bar slot；Agree with back-shaped notch The rack gear sliding slot perpendicular to third bar slot of certain depth, and rack gear sliding slot and second gear slot transverse direction phase are provided on one side wall It is logical；One end that transmission notch is provided on telescopic rod is hinged by swivel pin and two trunnions；Second gear is mounted on biography by axis On one side wall of dynamic notch, and second gear is meshed with corresponding first gear；Second rack gear is embedded in the in telescopic rod In three bar slots, and third bar slot is stretched out at its both ends respectively；Pressure spring plate is located in reseting groove, and pressure spring plate is nested on the second rack gear And it is connected therewith；Reset spring is located in reseting groove, and reset spring is nested on the second rack gear；Reset spring one end and pressure spring Plate connection, the other end connect on the rectangular end face of half round block with reseting groove inner wall and are provided with half slot；Half round block is located at transmission notch In, and half round block is connected by one end of its arc surface and the second rack gear；Rectangular stretch is provided on the end face of one end of telescopic Contracting slot；It is equably provided with several limiting slots along its length on one side wall of telescopic chute；Telescopic is flexible by thereon Being slidably matched for back-shaped notch of agreeing on slot and telescopic rod is nested on telescopic rod；Third gear is mounted on the second tooth by axis In race, and the central axis of third gear is both perpendicular to the length direction of second gear slot and the length side of rack gear sliding slot To；Third gear is meshed with the second rack gear；One end of third rack gear has arc surface；Without arc surface on third rack gear One end is inserted into rack gear sliding slot, and third rack gear is meshed with third gear；There is one end of arc surface and stretch on third rack gear Several limiting slots on contracting slot inner wall match；Support spring is located in telescopic chute, and the both ends of support spring respectively with it is flexible The end face of bar is connected with telescopic chute inner wall.

One end that the second bar slot is stretched out on above three mandril is inserted into the half slot on corresponding half round block and phase respectively The arc surface in half slot answered is engaged.

As the further improvement of this technology, above-mentioned support spring is compressed spring.

As the further improvement of this technology, the central axis of the hinge hole on circle central axis and trunnion on above-mentioned half round block Line is overlapped.

As the further improvement of this technology, the circle central axis of above-mentioned half slot is overlapped with the circle central axis of half round block.

As the further improvement of this technology, above-mentioned second gear and telescopic rod are connected.

As the further improvement of this technology, above-mentioned mandril original state central axis and pass through corresponding semicircle The circle central axis of block.

Circle central axis in the utility model on half round block is overlapped with the central axis of the hinge hole on trunnion, half slot Circle central axis is overlapped with the circle central axis of half round block, mandril original state central axis and pass through corresponding half round block The purpose of design of circle central axis is that, when stopping walking about with the patient of crutch, patient preferably supports in order to obtain, downward with hand The drive ring below handrail is pushed, so that drive ring drives connecting cylinder and fixed ring together along mobile jib slide downward；Fixed ring band Dynamic the first Zhi Cha mechanism, the second Zhi Cha mechanism, third Zhi Cha mechanism and three first gears being mounted thereon are transported downwardly together Dynamic, three first gears rotate under the action of corresponding first rack gear；Three first gears pass through respectively to be meshed therewith Second gear drives the first Zhi Cha mechanism, the second Zhi Cha mechanism and third Zhi Cha mechanism in the hinge hole on corresponding trunnion Mandrel line is to swinging around mobile jib；Meanwhile it being installed on the 4th gear in the first fixing seat and the 5th gear and consolidating with link block Ring gear even moves synchronously downwardly together；4th gear drives the screw rod for revolving sum therewith to move downwardly together；Screw rod passes through top plate It drives three mandrils being mounted in top plate to synchronize together to move downward；Due to the hinge on the circle central axis and trunnion on half round block The central axis for connecing hole is overlapped, and the circle central axis of half slot is overlapped with the circle central axis of half round block, and mandril is in original state Heart line is vertical and passes through the circle central axis of corresponding half round block, so in the first Zhi Cha mechanism, the second Zhi Cha mechanism and third branch During wooden fork mechanism is swung simultaneously, half round block in the first Zhi Cha mechanism, the second Zhi Cha mechanism and third Zhi Cha mechanism is always Circle central axis around itself is swung, and the central axis of three mandrils passes through the circle central axis on corresponding half round block, three tops always Bar always with the inner arc face contact of half slot so that the press of three mandrils, double of round block is fast and effective.

The purpose of design that second gear and telescopic rod are connected in the utility model is, the rotation of first gear can be by the The first Zhi Cha mechanism or the second Zhi Cha mechanism or third Zhi Cha mechanism where two gears drive telescopic rod are swung.

When stopping walking about with the patient of crutch, patient preferably supports in order to obtain, is pushed down below handrail with hand Drive ring so that drive ring drives connecting cylinder and fixed ring together along mobile jib slide downward；Fixed ring drive is mounted thereon The first Zhi Cha mechanism, the second Zhi Cha mechanism, third Zhi Cha mechanism and three first gears move downwardly together, three the first teeth Wheel rotates under the action of corresponding first rack gear；Three first gears pass through the second gear that is meshed therewith respectively and drive the The central axis of the hinge hole of one Zhi Cha mechanism, the second Zhi Cha mechanism and third Zhi Cha mechanism on corresponding trunnion is all to mobile jib Enclose swing；Meanwhile be installed on the 4th gear in the first fixing seat and the 5th gear and with link block be connected ring gear together with to Under move synchronously；4th gear drives the screw rod for revolving sum therewith to move downwardly together；Screw rod is mounted on top plate by top plate drive On three mandrils synchronize move downward together；Due to the central axis of the hinge hole on the circle central axis and trunnion on half round block Be overlapped, the circle central axis of half slot is overlapped with the circle central axis of half round block, mandril original state central axis and pass through The circle central axis of corresponding half round block, so being swung simultaneously in the first Zhi Cha mechanism, the second Zhi Cha mechanism and third Zhi Cha mechanism During, half round block in the first Zhi Cha mechanism, the second Zhi Cha mechanism and third Zhi Cha mechanism is always around the circle core shaft of itself String pendulum is dynamic, and the central axis of three mandrils passes through the circle central axis on corresponding half round block always, three mandrils always with half slot Inner arc face contact；When the first Zhi Cha mechanism, the second Zhi Cha mechanism and third Zhi Cha mechanism move downward and after with ground face contact, Continue to push down on drive ring so that drive ring by connecting cylinder, fixed ring drive the first Zhi Cha mechanism, the second Zhi Cha mechanism and Third Zhi Cha mechanism moves downward, and the first Zhi Cha mechanism, the second Zhi Cha mechanism and third Zhi Cha mechanism continue to swing out, and first Zhi Cha mechanism, the second Zhi Cha mechanism and third Zhi Cha mechanism and ground interaction, the first Zhi Cha mechanism, the second Zhi Cha mechanism and Third Zhi Cha mechanism is shunk simultaneously, and the first Zhi Cha mechanism, the second Zhi Cha mechanism and third branch wooden fork support spring within the organization are pressed Contracting, so that the first Zhi Cha mechanism, the second Zhi Cha mechanism and third Zhi Cha mechanism generate three direction support forces to crutch；At this point, Drive ring is pushed to lower section extreme position；Drive ring is twisted, drive ring drives ring gear to rotate by link block；Ring gear passes through the Five gears drive the rotation of the 4th gear；The rotation of 4th gear drives screw rod threadingly to move downward in hole；Screw rod passes through top plate band Dynamic three mandrils press downwards half round block in the first Zhi Cha mechanism, the second Zhi Cha mechanism and third Zhi Cha mechanism, first wooden fork Half round block in mechanism, the second Zhi Cha mechanism and third Zhi Cha mechanism passes through first wooden fork machine of corresponding second rack drives respectively Third gear rotation in structure, the second Zhi Cha mechanism and third Zhi Cha mechanism, the reset spring being nested on the second rack gear are being pressed It is compressed under the action of spring plate；Third gear in first Zhi Cha mechanism, the second Zhi Cha mechanism and third Zhi Cha mechanism band respectively It is to slide and enter in the limiting slot on telescopic chute inner wall that corresponding third rack gear, which is moved, to rack gear sliding slot；First Zhi Cha mechanism, Third rack gear in two Zhi Cha mechanisms and third Zhi Cha mechanism forms limitation to the contraction of corresponding telescopic；First wooden fork machine Structure, the second Zhi Cha mechanism and third Zhi Cha mechanism are no longer shunk, the first Zhi Cha mechanism, the second Zhi Cha mechanism and third Zhi Cha mechanism Length be fixed；Crutch will not be sent out under the supported at three point of the first Zhi Cha mechanism, the second Zhi Cha mechanism and third Zhi Cha mechanism Life is toppled over or is swung, and patient will not shake under the support of crutch, be conducive to the rehabilitation of patient, avoids because crutch is vertical Foot is unstable and patient is fallen down and causes secondary injury.

When the ground of crutch contact is broken terrain, the first Zhi Cha mechanism, the second Zhi Cha mechanism and third branch Wooden fork mechanism is in contact under the driving of drive ring with ground in different time points；First Zhi Cha mechanism, the second Zhi Cha mechanism Supports different with the contracted length of third Zhi Cha mechanism, in the first Zhi Cha mechanism, the second Zhi Cha mechanism and third Zhi Cha mechanism The decrement of spring is different；After drive ring is snapped down to extreme position, drive ring is twisted, so that the link block connecting with drive ring The 5th gear of ring gear connecting into the horizontal component of L-type sliding slot with link block and the 4th gear drive screw rod to move downward；Spiral shell Bar drives three mandrils to move downward by top plate；Three mandrils press the first Zhi Cha mechanism, the second Zhi Cha mechanism and the simultaneously Half round block in three Zhi Cha mechanisms；Half round block in first Zhi Cha mechanism, the second Zhi Cha mechanism and third Zhi Cha mechanism leads to respectively The third gear rotation in corresponding the first Zhi Cha of second rack drives mechanism, the second Zhi Cha mechanism and third Zhi Cha mechanism is crossed, The reset spring being nested on the second rack gear is compressed under the action of pressure spring plate；First Zhi Cha mechanism, the second Zhi Cha mechanism and Third gear in third Zhi Cha mechanism drives corresponding third rack gear to rack gear sliding slot for sliding respectively and enters in telescopic chute In limiting slot on wall；Third rack gear in first Zhi Cha mechanism, the second Zhi Cha mechanism and third Zhi Cha mechanism to stretching accordingly The contraction of contracting set forms limitation；First Zhi Cha mechanism, the second Zhi Cha mechanism and third Zhi Cha mechanism are no longer shunk, first wooden fork machine The different length of structure, the second Zhi Cha mechanism and third Zhi Cha mechanism is fixed, and crutch is in the first Zhi Cha mechanism, the second Zhi Cha mechanism Vertical state is kept under supported at three point with third Zhi Cha mechanism, to guarantee that crutch keeps flat on broken terrain Weighing apparatus.

When patient, which stays for some time, needs mobile, the horizontal component that drive ring skids off L-type sliding slot is moved to back twist with hand, So that drive ring drives ring gear to reversely rotate by link block；Ring gear pass sequentially through the 5th gear and the 4th gear drive screw rod to Upper movement；Screw rod drives three mandrils to move upwards by top plate；Three mandrils are released to the first Zhi Cha mechanism, second wooden fork machine The limitation of structure and half round block in third Zhi Cha mechanism；Under the action of reset spring, the first Zhi Cha mechanism, the second Zhi Cha mechanism It is moved upwards with the second rack gear in third Zhi Cha mechanism together with half round block and returns to initial position；Second rack gear passes through corresponding the Three gears drive third rack gear to be retracted back to initial position along rack gear sliding slot and release the limitation to telescopic；It is supported accordingly Under the action of spring, the telescopic in the first Zhi Cha mechanism, the second Zhi Cha mechanism and third Zhi Cha mechanism is along corresponding telescopic rod It returns sliding and returns to initial position；Original length restores in first Zhi Cha mechanism, the second Zhi Cha mechanism and third Zhi Cha mechanism；First Under the gravity of Zhi Cha mechanism, the second Zhi Cha mechanism and third Zhi Cha mechanism, the first Zhi Cha mechanism, the second Zhi Cha mechanism and Three Zhi Cha mechanisms automatically the hinge hole central axis bottom on corresponding trunnion to initial position；Meanwhile the first Zhi Cha mechanism, The bottom of second Zhi Cha mechanism and third Zhi Cha mechanism drives corresponding first gear to reversely rotate, first gear and corresponding the The interaction of one rack gear, so that fixed ring drives the first Zhi Cha mechanism, the second Zhi Cha mechanism and third Zhi Cha mechanism along mobile jib Move up to initial position.

The first Zhi Cha mechanism, the second Zhi Cha mechanism and third branch wooden fork relative to traditional transformer, in the utility model Mechanism can be opened by manual contraction；The first Zhi Cha mechanism, the second Zhi Cha mechanism and the third Zhi Cha mechanism opened are to crutch Form the situation of supported at three point so that crutch it is vertical it is more stable will not swing, will not occur by the patient of crutch It shakes；After first Zhi Cha mechanism, the second Zhi Cha mechanism and third Zhi Cha mechanism shrink, the occupied space very little of institute, from And obstacle is not constituted to the walking of patient；When encountering broken terrain, the first Zhi Cha mechanism, the second Zhi Cha mechanism and The fixed length of three Zhi Cha mechanisms is different, so that crutch is in a vertical state on the whole, and then guarantees to rely on the patient of crutch Balance, avoid patient from should be body uneven and fall down and cause secondary injury；The utility model structure is simple, have compared with Good using effect.

Detailed description of the invention

Fig. 1 is crutch schematic diagram.

Fig. 2 is drive ring, connecting cylinder, mobile jib, screw rod, ring gear, the 4th gear and the 5th gear cooperation diagrammatic cross-section.

Fig. 3 is drive ring, connecting cylinder, the first fixing seat, ring gear, link block and mobile jib cooperation diagrammatic cross-section.

Fig. 4 is mobile jib, ring gear, drive ring, link block, the 4th gear and the 5th gear cooperation diagrammatic cross-section.

Fig. 5 is mandril and half round block cooperation diagrammatic cross-section.

Fig. 6 is third gear, the 4th gear and the first rack gear cooperation diagrammatic cross-section.

Fig. 7 is the first Zhi Cha mechanism, the second Zhi Cha mechanism, third Zhi Cha mechanism, mandril, the first rack gear and fixed ring cooperation Diagrammatic cross-section.

Fig. 8 is mobile jib schematic diagram.

Fig. 9 is mobile jib diagrammatic cross-section.

Figure 10 is L-type sliding slot perspective diagram on mobile jib.

Figure 11 is first gear slot and the second bar grooved profile schematic diagram on mobile jib.

Figure 12 is fixed ring, mobile jib, top plate, the first rack gear and mandril cooperation schematic diagram.

Figure 13 is connecting cylinder, mobile jib, fixed ring, screw rod, top plate and mandril cooperation diagrammatic cross-section.

Figure 14 is screw rod, top plate and mandril cooperation schematic diagram.

Figure 15 is drive ring perspective diagram.

Figure 16 is drive ring diagrammatic cross-section.

Figure 17 is drive ring, link block and ring gear cooperation schematic diagram.

Figure 18 is connecting cylinder, the first positioning ring, the first fixing seat, the 4th gear and the 5th gear cooperation schematic diagram.

Figure 19 is connecting cylinder perspective diagram.

Figure 20 is connecting cylinder, fixed ring, trunnion and the second fixing seat cooperation schematic diagram.

Figure 21 is the 4th gear perspective diagram.

Figure 22 is the 4th gear diagrammatic cross-section.

Figure 23 is an axis and the second positioning ring cooperation perspective diagram.

Figure 24 is the first fixing seat schematic diagram.

Figure 25 is fixed ring, trunnion, the second fixing seat and the first Zhi Cha mechanism cooperation schematic diagram.

Figure 26 is first wooden fork structural scheme of mechanism.

Figure 27 is the first Zhi Cha mechanism diagrammatic cross-section.

Figure 28 is third gear, third rack gear, telescopic rod and telescopic cooperation diagrammatic cross-section.

Figure 29 is half round block perspective diagram.

Figure 30 is telescopic rod schematic diagram.

Figure 31 is third bar slot and second gear slot cooperation schematic diagram in telescopic rod.

Figure 32 is telescopic rod diagrammatic cross-section.

Figure 33 is telescopic perspective diagram.

Figure 34 is telescopic diagrammatic cross-section.

Figure 35 is reset spring and the second rack gear cooperation diagrammatic cross-section.

Figure 36 is telescopic rod reseting groove diagrammatic cross-section.

Figure label title: 1, handrail；2, mobile jib；3, the first sliding chamber；4, L-type sliding slot；5, the second sliding chamber；6, the first bar Slot；7, the second bar slot；8, first gear slot；9, drive ring；10, circular groove；11, the first annular groove；12, link block；13, ring gear；14, Connecting cylinder；15, limit sliding chutes；16, the first positioning ring；17, the first fixing seat；18, the 4th gear；19, threaded hole；20, second Annular groove；21, third annular groove；22, the second positioning ring；23, cylinder axis；24, the 5th gear；25, screw rod；26, fixed ring；27, trunnion； 28, the second fixing seat；29, top plate；30, mandril；31, guide block；32, the first rack gear；33, the first Zhi Cha mechanism；34, second wooden fork Mechanism；35, third Zhi Cha mechanism；36, telescopic rod；37, it is driven notch；38, agree with back-shaped notch；39, third bar slot；40, Two gear grooveds；41, rack gear sliding slot；42, first gear；43, second gear；44, half round block；45, half slot；46, the second rack gear； 47, swivel pin；48, third gear；49, third rack gear；50, telescopic；51, telescopic chute；52, limiting slot；53, support spring； 54, rod aperture；55, reseting groove；56, pressure spring plate；57, reset spring.

Specific embodiment

As shown in Figure 1, 2, it include handrail 1, the sliding chamber 3 of mobile jib 2, first, the sliding chamber 5 of L-type sliding slot 4, second, the first bar slot 6, Second bar slot 7, first gear slot 8, drive ring 9, circular groove 10, the first annular groove 11, link block 12, ring gear 13, connecting cylinder 14, limit Sliding slot 15, the first positioning ring 16, the first fixing seat 17, rod aperture 54, the 4th gear 18, threaded hole 19, the second annular groove 20, third ring Slot 21, the second positioning ring 22, cylinder axis 23, the 5th gear 24, screw rod 25, fixed ring 26, trunnion 27, the second fixing seat 28, first Gear 42, top plate 29, mandril 30, guide block 31, the first rack gear 32, the first Zhi Cha mechanism 33, the second Zhi Cha mechanism 34, third branch wooden fork Mechanism 35, wherein as shown in figure 9, upper end is provided with the sliding chamber 3 of cylindrical first in mobile jib 2；As shown in Figure 10, mobile jib 2 upper end L-type sliding slot 4 is provided on periphery, and L-type sliding slot 4 is communicated with the first sliding chamber 3；As shown in figure 9, being opened at lower end in mobile jib 2 There is the sliding chamber 5 of cylindrical second；As shown in figure 8, being provided with the first bar slot 6, and the first bar slot at the upper surface center of the second sliding chamber 5 6 communicate with the first sliding chamber 3；As shown in figure 11, the second bar slot 7 there are three circumferentially equably being opened on the inner headed face of the second sliding chamber 5, and Three the second bar slots 7 are communicated with the cylinder of mobile jib 2；The median plane of each second bar slot 7 passes through the central axis of mobile jib 2； First gear slot 8 there are three circumferentially equably being opened on the cylinder of 2 lower end of mobile jib, and each first gear slot 8 slides chamber 5 with second It communicates；Three first gear slots 8 are located at three the second bar slots, 7 side and correspond respectively with three the second bar slots 7；Each Side wall in second bar slot 7 is all parallel with the side wall in corresponding first gear slot 8；As shown in Fig. 7,12, each first gear First rack gear 32 is fixedly installed in slot 8；As shown in figure 13, there are two lead for circumferential equably installation on the cylinder of mobile jib 2 Block 31, and two guide blocks 31 are located at the top of the second bar slot 7；As shown in Figure 1, mobile jib 2 is mounted on the lower end surface center of handrail 1 Place, and the upper surface of mobile jib 2 and the lower end surface of handrail 1 are connected；As shown in figure 15, the lower end surface of drive ring 9 is provided with circular groove 10；Such as The first annular groove 11 is circumferentially provided with shown in Figure 16, on the inner wall of circular groove 10；As shown in figure 3,9 nesting of drive ring is mounted on mobile jib 2 At upper L-type sliding slot 4；As shown in Fig. 2, the first positioning ring 16 is nested on mobile jib 2 and is located in the first annular groove 11；Such as Figure 19 institute Show, it is circumferential on the inner headed face of connecting cylinder 14 equably to open that there are two limit sliding chutes 15, and two limit sliding chutes 15 and connecting cylinder 14 Length direction it is parallel；Two limit sliding chutes 15 are communicated with the lower end surface of connecting cylinder 14；As shown in figure 3, connecting cylinder 14 passes through Two limit sliding chutes 15 thereon and being slidably matched for two guide blocks 31 on mobile jib 2 are nested on mobile jib 2 and are located at drive ring 9 Lower section；The lower end surface of circular groove 10 and the first positioning ring 16 that the upper end of connecting cylinder 14 passes through 9 lower end of drive ring is connected；As Fig. 3, Shown in 20, fixed ring 26 is nested in 2 lower end of mobile jib and the lower end surface of connecting cylinder 14 and is connected；As shown in figure 13, fixed ring 26 is located at The top of second bar slot 7；As shown in Fig. 4,17, the inner headed face of ring gear 13 is the flank of tooth；Ring gear 13 is located in the first sliding chamber 3, and tooth The central axis of ring 13 is overlapped with the central axis of the first sliding chamber 3 or mobile jib 2；Ring gear 13 is by crossing the link block of L-type sliding slot 4 12 are connected with drive ring 9；As shown in figure 24, the upper surface of 17 one end of the first fixing seat is provided with rod aperture 54；As shown in Fig. 2, first Fixing seat 17 is located at the lower section of ring gear 13 in the on mobile jib 2 first sliding chamber 3, and is not provided with the one of rod aperture 54 in the first fixing seat 17 End is connected across L-type sliding slot 4 and connecting cylinder 14；As shown in Fig. 2,18, the median plane of the first fixing seat 17 by the first sliding chamber 3 or The section radius of circle of mobile jib 2, and the center of the central axis of the rod aperture 54 in the first fixing seat 17 and the first sliding chamber 3 or mobile jib 2 Axis is overlapped.

As shown in figure 21, the threaded hole 19 of perforation is provided at an end face center of the 4th gear 18；As shown in figure 22, Threadingly 19 circumference of hole is provided with the second annular groove 20 in the outside of one end face upper screwed hole 19 of four gears 18；The bottom of second sliding slot It is provided with third annular groove 21；As shown in Fig. 3,23, the second positioning ring 22 is embedded in the third annular groove 21 in the 4th gear 18；Cylinder axis 23 It is connected in the second annular groove 20 that one end is inserted into the 4th gear 18 and with the second positioning ring 22；As shown in Fig. 2,18, the 4th gear 18 are mounted on the upper surface of the first fixing seat 17 by cylinder axis 23, and the 4th gear 18 is located in ring gear 13；On 4th gear 18 The central axis of threaded hole 19 be overlapped with the central axis of the rod aperture 54 in the first fixing seat 17；5th gear 24 is pacified by axis On the upper surface of the first fixing seat 17, and the 5th gear 24 is located in ring gear 13；5th gear 24 simultaneously with the 4th gear 18 and ring gear 13 be meshed；As shown in Fig. 3,5, screw rod 25 is embedded in the first bar slot 6 in mobile jib 2, and the both ends of screw rod 25 point It Wei Yu not be in the first sliding chamber 3 and the second sliding chamber 5；As shown in Fig. 2, the one end being located in the first sliding chamber 3 on screw rod 25 sequentially passes through The threaded hole 19 in rod aperture 54, cylinder axis 23 and the 4th gear 18 of screw-in in first fixing seat 17；As shown in Fig. 5,13,14, spiral shell The one end being located in the second sliding chamber 5 on bar 25 is fixedly installed with top plate 29；As shown in Figure 12,14, pacify on the lower end surface of top plate 29 There are three the inclined mandrils 30 of circumference array for dress, and the one end not connecting with top plate 29 on three mandrils 30 is each passed through mobile jib Three the second bar slots 7 on 2；As shown in fig. 7, the first Zhi Cha mechanism 33, the second Zhi Cha mechanism 34 and third Zhi Cha mechanism 35 are each From the lower end surface for being mounted on fixed ring 26 by hinged two trunnions 27 therewith, and 33, second wooden fork machines of the first Zhi Cha mechanism Structure 34 and third Zhi Cha mechanism 35 are distributed along 26 lower end surface circumference array of fixed ring；As shown in Figure 5,6, the first Zhi Cha mechanism 33, Second Zhi Cha mechanism 34 and third Zhi Cha mechanism 35 are matched with the one end for stretching out the second sliding chamber 5 on three mandrils 30 respectively；Such as Fig. 6, shown in 20, three the second fixing seats 28 are mounted on the lower end surface of fixed ring 26 by circumference array, and three second fixations Seat 28 is located at the top of three first gear slots 8；As shown in figure 25, three first gears 42 are installed respectively each by axis In three the second fixing seats 28；As shown in Figure 6,7, three first gears 42 are each passed through corresponding first gear slot 8 and phase While the first rack gear 32 answered is meshed again respectively with the first Zhi Cha mechanism 33, the second Zhi Cha mechanism 34 and third Zhi Cha mechanism 35 match.

As shown in Fig. 1,26, the inside of above-mentioned first Zhi Cha mechanism 33, the second Zhi Cha mechanism 34 and third Zhi Cha mechanism 35 Structure is identical；As shown in Figure 26,27, for the first Zhi Cha mechanism 33, it include telescopic rod 36, transmission notch 37, Agree with back-shaped notch 38, third bar slot 39, second gear slot 40, rack gear sliding slot 41, reseting groove 55, pressure spring plate 56, reset spring 57, second gear 43, half round block 44, half slot 45, the second rack gear 46, swivel pin 47, third gear 48, third rack gear 49, stretch Contracting set 50, telescopic chute 51, limiting slot 52, support spring 53, wherein as shown in figure 30,36 one end of telescopic rod is provided with transmission notch 37；As shown in Figure 31,36, the bottom of transmission notch 37 is provided with the third bar slot 39 along the perforation of 36 length direction of telescopic rod；Such as figure Shown in 36, the inner wall of third bar slot 39 is circumferentially provided with reseting groove 55；As shown in figure 30, transmission notch 37 is not provided on telescopic rod 36 One end be provided with certain length agree with back-shaped notch 38；As shown in figure 32, it is provided on telescopic rod 36 and agrees with back-shaped notch 38 The second gear slot 40 of certain depth is provided on the end face of one end, and second gear slot 40 is laterally communicated with third bar slot 39；Contract Close the rack gear sliding slot 41 perpendicular to third bar slot 39 that certain depth is provided on a side wall of back-shaped notch 38, and rack gear sliding slot 41 laterally communicate with second gear slot 40；As shown in figure 25, one end that transmission notch 37 is provided on telescopic rod 36 passes through swivel pin 47 and two trunnions 27 it is hinged；Second gear 43 is mounted on a side wall of transmission notch 37 by axis, and second gear 43 It is meshed with corresponding first gear 42；As shown in figure 27, in the third bar slot 39 in the second rack gear 46 insertion telescopic rod 36, and Third bar slot 39 is stretched out at its both ends respectively；As shown in Figure 27,35, pressure spring plate 56 is located in reseting groove 55, and pressure spring plate 56 is nested It is connected on the second rack gear 46 and therewith；As shown in figure 35, reset spring 57 is located in reseting groove 55, and reset spring 57 is nested On the second rack gear 46；57 one end of reset spring is connect with pressure spring plate 56, and the other end is connect with 55 inner wall of reseting groove；Such as Figure 29 institute Show, is provided with half slot 45 on the rectangular end face of half round block 44；As shown in Fig. 5,25, half round block 44 is located in transmission notch 37, and Half round block 44 is connected by one end of its arc surface and the second rack gear 46；As shown in figure 33, on the end face of one end of telescopic 50 It is provided with rectangular telescopic chute 51；As shown in figure 34, it is equably provided with along its length on a side wall of telescopic chute 51 several Limiting slot 52；As shown in Figure 27,28, telescopic 50 is by agreeing with back-shaped notch 38 on telescopic chute 51 and telescopic rod 36 thereon Be slidably matched and be nested on telescopic rod 36；As shown in Figure 27,28, third gear 48 is mounted on second gear slot 40 by axis In, and the central axis of third gear 48 is both perpendicular to the length direction of second gear slot 40 and the length side of rack gear sliding slot 41 To；Third gear 48 is meshed with the second rack gear 46；One end of third rack gear 49 has arc surface；Do not have on third rack gear 49 In one end insertion rack gear sliding slot 41 of arc surface, and third rack gear 49 is meshed with third gear 48；Have on third rack gear 49 One end of arc surface is matched with several limiting slots 52 on 51 inner wall of telescopic chute；Support spring 53 is located in telescopic chute 51, and The both ends of support spring 53 are connect with the end face of telescopic rod 36 and 51 inner wall of telescopic chute respectively.

As shown in Figure 5,6, corresponding half round block 44 is inserted into one end that the second bar slot 7 is stretched out on above three mandril 30 respectively On half slot 45 in be engaged with the arc surface in corresponding half slot 45.

As shown in figure 28, above-mentioned support spring 53 is compressed spring.

As shown in Fig. 5,6,25, the central axis weight of the hinge hole on circle central axis and trunnion 27 on above-mentioned half round block 44 It closes.

As shown in Fig. 5,6,25, the circle central axis of above-mentioned half slot 45 is overlapped with the circle central axis of half round block 44.

As shown in figure 27, above-mentioned second gear 43 is connected with telescopic rod 36.

As shown in figure 5, central axis of the above-mentioned mandril 30 in original state and the center of circle across corresponding half round block 44 Axis.

Circle central axis in the utility model on half round block 44 is overlapped with the central axis of the hinge hole on trunnion 27, semicircle The circle central axis of slot 45 is overlapped with the circle central axis of half round block 44, mandril 30 original state central axis and pass through corresponding The purpose of design of circle central axis of half round block 44 be that, when stopping walking about with the patient of crutch, patient is better in order to obtain Support pushes down on the drive ring 9 of 1 lower section of handrail with hand, so that drive ring 9 drives connecting cylinder 14 and fixed ring 26 together along master 2 slide downward of bar；Fixed ring 26 drives the first Zhi Cha mechanism 33, the second Zhi Cha mechanism 34, third branch wooden fork machine being mounted thereon Structure 35 and three first gears 42 move downwardly together, and three first gears 42 are revolved under the action of corresponding first rack gear 32 Turn；Three first gears 42 drive 33, second wooden fork machines of the first Zhi Cha mechanism by the second gear 43 being meshed therewith respectively The central axis of the hinge hole of structure 34 and third Zhi Cha mechanism 35 on corresponding trunnion 27 is swung to 2 surrounding of mobile jib；Meanwhile pacifying It is same downwardly together loaded on the 4th gear 18 and the 5th gear 24 in the first fixing seat 17 and the ring gear 13 being connected with link block 12 Step movement；4th gear 18 drives the screw rod 25 for revolving sum therewith to move downwardly together；Screw rod 25 is mounted on by the drive of top plate 29 Three mandrils 30 in top plate 29 synchronize together to be moved downward；Due on half round block 44 circle central axis with it is hinged on trunnion 27 The central axis in hole is overlapped, and the circle central axis of half slot 45 is overlapped with the circle central axis of half round block 44, and mandril 30 is in original state Central axis and pass through corresponding half round block 44 circle central axis, so in the first Zhi Cha mechanism 33, the second Zhi Cha mechanism During 34 and third Zhi Cha mechanism 35 is swung simultaneously, the first Zhi Cha mechanism 33, the second Zhi Cha mechanism 34 and third branch wooden fork machine Half round block 44 in structure 35 is swung around the circle central axis of itself always, and the central axis of three mandrils 30 passes through corresponding semicircle always Circle central axis on block 44, three mandrils 30 always with the inner arc face contact of half slot 45 so that three mandrils 30 are to half round block 44 press is fast and effective.

The purpose of design that second gear 43 and telescopic rod 36 are connected in the utility model is, the rotation of first gear 42 can be with Pass through the first Zhi Cha mechanism 33 or the second Zhi Cha mechanism 34 or third Zhi Cha mechanism where the drive of second gear 43 telescopic rod 36 35 swing.

The workflow of the utility model: when stopping walking about with the patient of crutch, patient preferably supports in order to obtain, The drive ring 9 of the lower section of handrail 1 is pushed down on hand so that drive ring 9 drive connecting cylinder 14 and fixed ring 26 together along mobile jib 2 to Lower slider；Fixed ring 26 drives the first Zhi Cha mechanism 33, the second Zhi Cha mechanism 34,35 and of third Zhi Cha mechanism being mounted thereon Three first gears 42 move downwardly together, and three first gears 42 rotate under the action of corresponding first rack gear 32；Three First gear 42 drives the first Zhi Cha mechanism 33, the second Zhi Cha mechanism 34 and the by the second gear 43 that is meshed therewith respectively The central axis of hinge hole of the three Zhi Cha mechanisms 35 on corresponding trunnion 27 is swung to 2 surrounding of mobile jib；Meanwhile being installed on first The 4th gear 18 and the 5th gear 24 and the ring gear 13 connected with link block 12 in fixing seat 17 move synchronously downwardly together；The Four gears 18 drive the screw rod 25 for revolving sum therewith to move downwardly together；Screw rod 25 is mounted in top plate 29 by the drive of top plate 29 Three mandrils 30 synchronize move downward together；Due to the central axis of the hinge hole on the circle central axis and trunnion 27 on half round block 44 Line is overlapped, and the circle central axis of half slot 45 is overlapped with the circle central axis of half round block 44, and mandril 30 hangs down in the center line of original state Direct join passes through the circle central axis of corresponding half round block 44, so in the first Zhi Cha mechanism 33, the second Zhi Cha mechanism 34 and third branch During wooden fork mechanism 35 is swung simultaneously, in the first Zhi Cha mechanism 33, the second Zhi Cha mechanism 34 and third Zhi Cha mechanism 35 half Round block 44 is swung around the circle central axis of itself always, and the central axis of three mandrils 30 passes through the circle on corresponding half round block 44 always Mandrel line, three mandrils 30 always with the inner arc face contact of half slot 45；When the first Zhi Cha mechanism 33,34 and of the second Zhi Cha mechanism Third Zhi Cha mechanism 35 moves downward and with after ground face contact, continues to push down on drive ring 9, so that drive ring 9 passes through connection Cylinder 14, fixed ring 26 drive the first Zhi Cha mechanism 33, the second Zhi Cha mechanism 34 and third Zhi Cha mechanism 35 to move downward, and first Wooden fork mechanism 33, the second Zhi Cha mechanism 34 and third Zhi Cha mechanism 35 continue to swing out, the first 33, second, Zhi Cha mechanism wooden fork machine Structure 34 and third Zhi Cha mechanism 35 and ground interaction, the first Zhi Cha mechanism 33, the second Zhi Cha mechanism 34 and third branch wooden fork machine Structure 35 is shunk simultaneously, and the support spring 53 in the first Zhi Cha mechanism 33, the second Zhi Cha mechanism 34 and third Zhi Cha mechanism 35 is pressed Contracting, so that the first Zhi Cha mechanism 33, the second Zhi Cha mechanism 34 and third Zhi Cha mechanism 35 generate three direction support forces to crutch； At this point, drive ring 9 is pushed to lower section extreme position；Drive ring 9 is twisted, drive ring 9 drives ring gear 13 to revolve by link block 12 Turn；Ring gear 13 drives the rotation of the 4th gear 18 by the 5th gear 24；The rotation of 4th gear 18 drives the threadingly hole of screw rod 25 19 move downward；Screw rod 25 drives three mandrils 30 press the first Zhi Cha mechanism 33, the second Zhi Cha mechanism downwards by top plate 29 Half round block 44 in 34 and third Zhi Cha mechanism 35, the first Zhi Cha mechanism 33, the second Zhi Cha mechanism 34 and third Zhi Cha mechanism 35 In half round block 44 pass through corresponding second rack gear 46 respectively and drive the first Zhi Cha mechanism 33, the second Zhi Cha mechanism 34 and third branch Third gear 48 in wooden fork mechanism 35 rotates, and is nested in quilt under the action of pressure spring plate 56 of the reset spring 57 on the second rack gear 46 Compression；Third gear 48 in first Zhi Cha mechanism 33, the second Zhi Cha mechanism 34 and third Zhi Cha mechanism 35 drives accordingly respectively Third rack gear 49 to rack gear sliding slot 41 be slide and enter 51 inner wall of telescopic chute on limiting slot 52 in；First Zhi Cha mechanism 33, the third rack gear 49 in the second Zhi Cha mechanism 34 and third Zhi Cha mechanism 35 forms limit to the contraction of corresponding telescopic 50 System；First Zhi Cha mechanism 33, the second Zhi Cha mechanism 34 and third Zhi Cha mechanism 35 are no longer shunk, the first Zhi Cha mechanism 33, second The length of Zhi Cha mechanism 34 and third Zhi Cha mechanism 35 is fixed；Crutch is in the first Zhi Cha mechanism 33,34 and of the second Zhi Cha mechanism It will not topple over or swing under the supported at three point of third Zhi Cha mechanism 35, patient will not shake under the support of crutch, The rehabilitation for being conducive to patient avoids and patient is fallen down and causes secondary injury because crutch bases oneself upon unstable.

When the ground of crutch contact is broken terrain, the first Zhi Cha mechanism 33, the second Zhi Cha mechanism 34 and the Three Zhi Cha mechanisms 35 are in contact under the driving of drive ring 9 with ground in different time points；First Zhi Cha mechanism 33, second The contracted length of Zhi Cha mechanism 34 and third Zhi Cha mechanism 35 is different, the first Zhi Cha mechanism 33, the second Zhi Cha mechanism 34 and third The decrement of support spring 53 in Zhi Cha mechanism 35 is different；After drive ring 9 is snapped down to extreme position, drive ring 9 is twisted, is made The link block 12 that connect with drive ring 9 enters the horizontal component of L-type sliding slot 4, the ring gear 13 connecting with link block 12 passes through the Five gears 24 and the 4th gear 18 drive screw rod 25 to move downward；Screw rod 25 drives three mandrils 30 to transport downwards by top plate 29 It is dynamic；Three mandrils 30 press half round block in the first Zhi Cha mechanism 33, the second Zhi Cha mechanism 34 and third Zhi Cha mechanism 35 simultaneously 44；Half round block 44 in first Zhi Cha mechanism 33, the second Zhi Cha mechanism 34 and third Zhi Cha mechanism 35 passes through corresponding the respectively Two rack gears 46 drive the third gear 48 in the first Zhi Cha mechanism 33, the second Zhi Cha mechanism 34 and third Zhi Cha mechanism 35 to rotate, The reset spring 57 being nested on the second rack gear 46 is compressed under the action of pressure spring plate 56；First 33, second, Zhi Cha mechanism Third gear 48 in wooden fork mechanism 34 and third Zhi Cha mechanism 35 drives the corresponding third rack gear 49 to be to rack gear sliding slot 41 respectively It slides and enters in the limiting slot 52 on 51 inner wall of telescopic chute；First Zhi Cha mechanism 33, the second Zhi Cha mechanism 34 and third branch wooden fork Third rack gear 49 in mechanism 35 forms limitation to the contraction of corresponding telescopic 50；First 33, second, Zhi Cha mechanism wooden fork machine Structure 34 and third Zhi Cha mechanism 35 are no longer shunk, the first Zhi Cha mechanism 33, the second Zhi Cha mechanism 34 and third Zhi Cha mechanism 35 Different length is fixed, supported at three point of the crutch in the first Zhi Cha mechanism 33, the second Zhi Cha mechanism 34 and third Zhi Cha mechanism 35 Lower holding vertical state, to guarantee that crutch keeps balance on broken terrain.

When patient, which stays for some time, needs mobile, the horizontal part that drive ring 9 skids off L-type sliding slot 4 is moved to back twist with hand Point, so that drive ring 9 drives ring gear 13 to reversely rotate by link block 12；Ring gear 13 passes sequentially through the 5th gear 24 and the 4th tooth 18 drive screw rod 25 of wheel moves upwards；Screw rod 25 drives three mandrils 30 to move upwards by top plate 29；Three mandrils 30 release Limitation to half round block 44 in the first Zhi Cha mechanism 33, the second Zhi Cha mechanism 34 and third Zhi Cha mechanism 35；In reset spring Under the action of 57, the second rack gear 46 in the first Zhi Cha mechanism 33, the second Zhi Cha mechanism 34 and third Zhi Cha mechanism 35 is together with half Round block 44, which moves upwards, returns to initial position；Second rack gear 46 drives third rack gear 49 along rack gear by corresponding third gear 48 Sliding slot 41 is retracted back to initial position and releases the limitation to telescopic 50；Under the action of corresponding support spring 53, first Telescopic 50 in Zhi Cha mechanism 33, the second Zhi Cha mechanism 34 and third Zhi Cha mechanism 35 is returned sliding and is returned along corresponding telescopic rod 36 To initial position；Original length restores in first Zhi Cha mechanism 33, the second Zhi Cha mechanism 34 and third Zhi Cha mechanism 35；At first Under the gravity of wooden fork mechanism 33, the second Zhi Cha mechanism 34 and third Zhi Cha mechanism 35, the first 33, second, Zhi Cha mechanism wooden fork machine Structure 34 and third Zhi Cha mechanism 35 automatically the hinge hole central axis bottom on corresponding trunnion 27 to initial position；Meanwhile The bottom of first Zhi Cha mechanism 33, the second Zhi Cha mechanism 34 and third Zhi Cha mechanism 35 drives the corresponding reversely rotation of first gear 42 Turn, the interaction of first gear 42 and corresponding first rack gear 32, so that fixed ring 26 drives the first Zhi Cha mechanism 33, second Zhi Cha mechanism 34 and third Zhi Cha mechanism 35 move up to initial position along mobile jib 2.

In conclusion the utility model has the beneficial effects that the first Zhi Cha mechanism 33, the second Zhi Cha mechanism 34 and third branch wooden fork Mechanism 35 can be opened by manual contraction；The first Zhi Cha mechanism 33, the second Zhi Cha mechanism 34 and the third Zhi Cha mechanism opened 35 pairs of crutch form the situation of supported at three point so that crutch it is vertical it is more stable will not swing, by the patient of crutch It will not shake；After first Zhi Cha mechanism 33, the second Zhi Cha mechanism 34 and third Zhi Cha mechanism 35 shrink, occupied by institute Space very little, so that the walking to patient does not constitute obstacle；When encountering broken terrain, the first Zhi Cha mechanism 33, Second Zhi Cha mechanism 34 is different with the fixed length of third Zhi Cha mechanism 35, so that crutch is in a vertical state on the whole, into And guarantee the balance of the patient by crutch, avoid patient from should be body imbalance and fall down and cause secondary injury.

Claims

1. a kind of medical recovery crutch, it is characterised in that: it include handrail, mobile jib, the first sliding chamber, L-type sliding slot, the second sliding chamber, First bar slot, the second bar slot, first gear slot, drive ring, circular groove, the first annular groove, link block, ring gear, connecting cylinder, limit are slided Slot, the first positioning ring, the first fixing seat, rod aperture, the 4th gear, threaded hole, the second annular groove, third annular groove, the second positioning ring, cylinder Axis, the 5th gear, screw rod, fixed ring, trunnion, the second fixing seat, first gear, top plate, mandril, guide block, the first rack gear, first Zhi Cha mechanism, the second Zhi Cha mechanism, third Zhi Cha mechanism, wherein upper end is provided with the sliding chamber of cylindrical first in mobile jib；On mobile jib L-type sliding slot is provided on the periphery at end, and L-type sliding slot is communicated with the first sliding chamber；Cylinder is provided in mobile jib at lower end Second sliding chamber；The first bar slot is provided at the upper surface center of second sliding chamber, and the first bar slot is communicated with the first sliding chamber；Second sliding chamber Inner headed face on it is circumferential equably open that there are three the second bar slots, and three the second bar slots are communicated with the cylinder of mobile jib；Each The median plane of two bar slots all passes through the central axis of mobile jib；First gear there are three circumferentially equably being opened on the cylinder of mobile jib lower end Slot, and each first gear slot is communicated with the second sliding chamber；Three first gear slots are located at by three the second bar slots and divide It is not corresponded with three the second bar slots；Side wall in each second bar slot and the side wall in corresponding first gear slot are flat Row；First rack gear is fixedly installed in each first gear slot；There are two lead for circumferential equably installation on the cylinder of mobile jib Block, and two guide blocks are located at the top of the second bar slot；Mobile jib is mounted at the lower end surface center of handrail, and the upper surface of mobile jib with The lower end surface of handrail is connected；The lower end surface of drive ring is provided with circular groove；The first annular groove is circumferentially provided on the inner wall of circular groove；Drive ring Nesting is mounted on mobile jib at L-type sliding slot；First positioning ring is nested on mobile jib and is located in the first annular groove；The inner circle of connecting cylinder Limit sliding chutes there are two circumferentially equably being opened on face, and two limit sliding chutes are parallel with the length direction of connecting cylinder；Two limits Sliding slot is communicated with the lower end surface of connecting cylinder；The cunning that connecting cylinder passes through two guide blocks in two limit sliding chutes and mobile jib thereon Dynamic cooperation is nested in the lower section on mobile jib and being located at drive ring；The upper end of connecting cylinder passes through the circular groove of drive ring lower end and first and determines The lower end surface of position ring is connected；Fixed ring is nested in mobile jib lower end and the lower end surface of connecting cylinder and is connected；Fixed ring is located at the second bar slot Top；The inner headed face of ring gear is the flank of tooth；Ring gear is located in the first sliding chamber, and the central axis of ring gear and the first sliding chamber or mobile jib Central axis be overlapped；Ring gear is connected by the link block and drive ring for crossing L-type sliding slot；The upper surface of first fixing seat one end It is provided with rod aperture；The lower section of first fixed seating ring gear in the first sliding chamber on mobile jib, and it is not provided with rod aperture in the first fixing seat One end pass through L-type sliding slot and connecting cylinder and be connected；The median plane of first fixing seat is by the first sliding chamber or the section circle half of mobile jib Diameter, and the central axis of the rod aperture in the first fixing seat is overlapped with the central axis of the first sliding chamber or mobile jib；The one of 4th gear The threaded hole of perforation is provided at a end face center；Threadingly hole circumference is provided in the outside of one end face upper screwed hole of the 4th gear Second annular groove；The bottom of second sliding slot is provided with third annular groove；Second positioning ring is embedded in the third annular groove in the 4th gear；Coaxially One end is inserted into the second annular groove in the 4th gear and is connected with the second positioning ring；4th gear is mounted on first by cylinder axis and consolidates The upper surface of reservation, and the 4th gear is located in ring gear；On the central axis and the first fixing seat of threaded hole on 4th gear Rod aperture central axis be overlapped；5th gear is mounted on the upper surface of the first fixing seat by axis, and the 5th gear is located at In ring gear；5th gear is meshed with the 4th gear and ring gear simultaneously；Screw rod is embedded in the first bar slot in mobile jib, and screw rod Both ends are located in the first sliding chamber and the second sliding chamber；The one end being located in the first sliding chamber on screw rod sequentially passes through the first fixing seat On rod aperture, cylinder axis and screw in the 4th gear on threaded hole；The one end being located in the second sliding chamber on screw rod is fixedly installed with top Disk；Inclined mandril there are three circumference array, and one not connect with top plate on three mandrils are installed on the lower end surface of top plate Hold three the second bar slots being each passed through on mobile jib；First Zhi Cha mechanism, the second Zhi Cha mechanism and third Zhi Cha mechanism respectively lead to Cross the lower end surface that two hinged therewith trunnions are mounted on fixed ring, and the first Zhi Cha mechanism, the second Zhi Cha mechanism and third branch Wooden fork mechanism is distributed along fixed ring lower end surface circumference array；First Zhi Cha mechanism, the second Zhi Cha mechanism and third Zhi Cha mechanism difference It is matched with the one end for stretching out the second sliding chamber on three mandrils；Three the second fixing seats are mounted under fixed ring by circumference array On end face, and three the second fixing seats are located at the top of three first gear slots；Three first gears are each by axis point It is not mounted in three the second fixing seats；Three first gears are each passed through corresponding first gear slot and corresponding first rack gear It is matched respectively with the first Zhi Cha mechanism, the second Zhi Cha mechanism and third Zhi Cha mechanism again while being meshed；Described first Wooden fork mechanism, the second Zhi Cha mechanism are identical with the internal structure of third Zhi Cha mechanism；For the first Zhi Cha mechanism, it is wrapped Telescopic rod is included, notch is driven, agrees with back-shaped notch, third bar slot, second gear slot, rack gear sliding slot, reseting groove, pressure spring plate, answers Position spring, half round block, half slot, the second rack gear, swivel pin, third gear, third rack gear, telescopic, stretches at second gear Slot, limiting slot, support spring, wherein telescopic rod one end is provided with transmission notch；The bottom of transmission notch is provided with along length of telescopic bar The third bar slot of direction perforation；The inner wall of third bar slot is circumferentially provided with reseting groove；One end of transmission notch is not provided on telescopic rod Be provided with certain length agrees with back-shaped notch；It is provided on telescopic rod on the end face for agreeing with one end of back-shaped notch and is provided with certain depth Second gear slot, and second gear slot is laterally communicated with third bar slot；Agree with and is provided on a side wall of back-shaped notch centainly The rack gear sliding slot perpendicular to third bar slot of depth, and rack gear sliding slot is laterally communicated with second gear slot；Biography is provided on telescopic rod One end of dynamic notch is hinged by swivel pin and two trunnions；Second gear is mounted on a side wall of transmission notch by axis On, and second gear is meshed with corresponding first gear；Second rack gear is embedded in the third bar slot in telescopic rod, and its both ends Third bar slot is stretched out respectively；Pressure spring plate is located in reseting groove, and pressure spring plate is nested on the second rack gear and is connected therewith；Reset bullet Spring is located in reseting groove, and reset spring is nested on the second rack gear；Reset spring one end is connect with pressure spring plate, the other end and multiple Half slot is provided on the rectangular end face of position slot inner wall half round block of connection；Half round block is located in transmission notch, and half round block passes through it One end of arc surface and the second rack gear is connected；Rectangular telescopic chute is provided on the end face of one end of telescopic；One of telescopic chute Several limiting slots are equably provided on side wall along its length；Telescopic passes through agreeing on telescopic chute and telescopic rod thereon Being slidably matched for back-shaped notch is nested on telescopic rod；Third gear is mounted in second gear slot by axis, and third gear Central axis both perpendicular to the length direction of second gear slot and the length direction of rack gear sliding slot；Third gear and the second tooth Item is meshed；One end of third rack gear has arc surface；In one end insertion rack gear sliding slot on third rack gear without arc surface, And third rack gear is meshed with third gear；Several limits on one end and telescopic chute inner wall on third rack gear with arc surface Slot matches；Support spring is located in telescopic chute, and the both ends of support spring respectively with the end face of telescopic rod and telescopic chute inner wall Connection；Stretched out on three mandrils the second bar slot one end be inserted into the half slot on corresponding half round block respectively with it is corresponding Arc surface in half slot is engaged.

2. a kind of medical recovery crutch according to claim 1, it is characterised in that: the support spring is compressed spring.

3. a kind of medical recovery crutch according to claim 1, it is characterised in that: circle central axis on half round block with The central axis of hinge hole on trunnion is overlapped.