CN209678785U - A kind of bone distraction apparatus - Google Patents

Abstract

The utility model discloses a kind of bone distraction apparatus, it is related to the field of medical instrument technology, including pedestal, it is used to support the support member of limbs of patient and the traction element for drawing limbs, traction element includes the hitch frame being mounted on the base and the traction rope for being separately connected hitch frame and limbs, and traction rope is equipped with the adjusting component for adjusting traction rope length；The hitch frame includes the elevating lever being hinged on pedestal and the draw bar that is connect with elevating lever by latching device；The latching device include the gear I for being located at elevating lever side end, be located at draw bar side end and with the matched gear II of gear I and the control piece that whether is engaged with gear II of control gear I, the gear I and gear II include several rounded evenly distributed rack gears, the installation direction of the rack gear with it is described circular radially consistent.The utility model structure is simple, it is good to operate convenient, highly effective, therapy rehabilitation effect, has the characteristics that direction, angle and the size of adjustment for the treatment of tractive force.

Description

A kind of bone distraction apparatus

Technical field

The utility model relates to the field of medical instrument technology, more particularly to a kind of bone distraction apparatus.

Background technique

Existing brown Bone traction frame is by main body stainless steel or metallic iron support frame, gauze bandage or strap, the head of a bed Fixed device, pulley, traction bow, traction rope, the composition such as sliding weight of steelyard hook, sliding weight of steelyard, be the reduction for clinically being used to fracture and dislocate, Maintain good contraposition after reduction and stablize, prevent with orthotic joint deformity, release muscle cramp and pain and fracture operation before A kind of necessary therapeutic device of traction therapeutic or certain classification of fracture finally treated.

The main structure of brown Bone traction frame be iron or it is stainless steel welded form, it is such construction have it is well-set Advantage, but it is a lack of the scalability of length, angle is fixed, in this way in clinical traction therapy of bone, it is difficult to meet height difference Patient's traction therapy of bone；Secondly because when traction therapy of bone, lower limb remain static for a long time, and traditional horizontally-supported Plane is the horizontally-supported pad made of bandage winding two sides metallic rod, and long-time Bone traction easily causes compression position soft tissue Blood circulatory disorder, or even there are the severe complications such as infection, necrosis, and the purulence blood of wound lower limb, infectious agent or dirt are easy The bandage plane above hitch frame is polluted, ward uses cross-infection easy to form；In addition, the present apparatus head of a bed fixes device, it must It must be fixed on the head of a bed appropriate and be tightly wrapped and can be used with bandage, according to clinical treatment observation, when lower limb are needed in outreach When the traction therapeutic of position, the fixation because pulley structure among the fixed device of the head of a bed cannot tilt；Finally, because the present apparatus is led Gravitation is sliding weight of steelyard to be placed on sliding weight of steelyard hook, by traction rope across pulley action on traction bow, and then play and persistently lead The effect drawn, but clinical observation is found, in patient's distraction procedure, body is usually occurred and is shifted to head of a bed side, such traction rope Displacement of taking advantage of a situation is linked up with sliding weight of steelyard, clinically it is often found that sliding weight of steelyard slides on the ground and generates invalid traction, loses traction therapeutic It loses.

Patent document " a kind of Bone traction force device " (CN106859829A) discloses a kind of Bone traction active force dress It sets, including traction element, elastic component, force snesor, the elastic component or force snesor connect traction element；For adjusting elastic component Collapsing length regulating member；Traction signal transceiver module, control module and power supply, control module is according to tractive force actual value The comparison result of size feedback signal and the received tractive force setting value size input signal of traction signal transceiver module, output control Signal processed, control to adjust component adjust elastic component collapsing length, make force snesor detect change length after elastic component by Tractive force actual value be equal to setting value；Meanwhile control module, according to input signal, output control signal controls to adjust component Kept for period action time of elastic component.The Bone traction force device can realize that self establishment is single or combines as needed Bone traction amount of force and period action time, and can be realized Bone traction active force and continuously adjust, degree of regulation is high, structure It is simple and convenient to operate.But the apparatus structure is relative complex, traction rope lead is unadjustable, and Rehabilitation treatment is poor.

Utility model content

In order to solve the problems existing in the prior art, the utility model proposes a kind of operation convenient, highly effectives, therapy rehabilitation The good bone distraction apparatus of effect has the characteristics that adjustment for the treatment of tractive force direction, angle and size.

The utility model includes pedestal, the support member for being used to support limbs of patient and the tractive unit for drawing limbs Part, the traction element include the hitch frame being mounted on the base and the traction rope for being separately connected hitch frame and limbs, described to lead Messenger is equipped with the adjusting component for adjusting traction rope length；

The hitch frame includes the elevating lever being hinged on pedestal and the draw bar that is connect with elevating lever by latching device；

The latching device include the gear I for being fixed on elevating lever side end, be fixed on draw bar side end and with The control piece whether matched gear II of gear I and control gear I engage with gear II, the gear I and gear II wrap Include several rounded evenly distributed rack gears, the installation direction of the rack gear with it is described circular radially consistent.

Further, the support member includes the telescopic rod I and telescopic rod II being mounted on the base, the telescopic rod I It is connect between telescopic rod II by telescopic rod III, the installation direction of the telescopic rod III and the placement direction of limbs are consistent, institute It states and is connected between telescopic rod III by connecting rod, air cushion is installed on the telescopic rod III, the support member further includes being used for Place the air cushion of limbs.

Further, the telescopic rod II is hinged on sliding block, and the pedestal is equipped with the sliding rail to match with sliding block.

Further, the telescopic rod I, telescopic rod II, telescopic rod III and elevating lever be equipped with have adjust its elongation or The regulating part of shortening effect.

Further, the regulating part includes decelerating motor or cylinder.

Further, the component that adjusts includes turning round cylinder and being respectively provided at the screw rod turning round cylinder both ends and being connected through a screw thread.

Further, the elevating lever is externally provided with the adjustment seat for adjusting elevating lever rotation direction and angle, the adjustment seat Including the mounting hole for being inserted into elevating lever and the fixed plate for adjustment seat to be mounted on the base, the mounting hole side is set There is fastener hole, the fastener hole is equipped with the fastener for fastening lift pin locations.

Further, the control piece includes the fastening bolt II being mutually matched and fastening nut, the fastening spiral shell Bolt II sequentially passes through gear I and gear II and fastening nut cooperates.

Further, the draw bar includes the pulley that end is arranged in, is arranged in draw bar side for showing detection The display screen of tractive force size and the groove that other end side end is arranged in, the bottom portion of groove are equipped with gear II.

Further, the air cushion includes evenly distributed through-hole and the inflating port for connecting inflating balloon, described to fill Check valve and deflation valve are equipped at port.

The utility model compared with the existing technology, the advantage is that:

1, the utility model adjusts the whole height of hitch frame by setting elevating lever, to adapt to the patient of different height, The lead and angle that traction rope can be adjusted on a large scale, by be arranged latching device, clinically encounter height it is excessively high or When too short patient needs to draw lower limb treatment, by adjusting control piece, gear I and gear II are unclamped, and then adjust draw bar Angle between elevating lever, then locking gear I and gear II, realize the adjustment of draw bar front or behind, meet clinic On encounter the excessively high or too short patient of height need to draw lower limb treatment the case where, further control traction rope lead and Angle, and the length of traction rope between hitch frame and limbs is had adjusted, finally by the tune for adjusting component progress traction rope length Section, the size for completing tractive force determine that the utility model is compared with the existing technology using the discrete traction of traditional sliding weight of steelyard traction The determination of force value, the utility model determine the side of the tractive force in distraction procedure using elevating lever, latching device and adjusting component To, angle and size, regulative mode continues and precisely, and easy to operate, therapy rehabilitation effect is more preferable.

2, the utility model traction rope difference fixed traction bow and traction rope dynamometry part, traction rope dynamometry part are power inductor Or electronics spring balance, preferably electronics spring balance, traction rope are equipped with the adjusting component for adjusting traction rope tensioning state, adjusting group Part includes turning round cylinder and screw rod, turns round cylinder and is equipped with tapped centre bore, screw rod, the screw thread of the screw rod at both ends are inserted into centre bore both ends For inverse structure, it ensure that adjusting component shortens or extends, and then controls traction rope tensioning state, and adjusting is led when turning round cylinder twisting Gravitation, and increasing traction can also further be haved the function that using electronic spring balance, regulative mode continues and accurate, behaviour Make simply, to be convenient for manual control, the determination of the discrete value of thrust relative to the traction of traditional sliding weight of steelyard, therapy rehabilitation effect is more preferable.

3, the utility model hitch frame includes the elevating lever being hinged on pedestal, the restricted elevating lever rotation of elevating lever peripheral hardware The adjustment seat in direction and angle, adjustment seat include the mounting hole for being inserted into elevating lever, and mounting hole uses trapezoidal groove, makes to go up and down Bar can swing, and the angle to swing is 60 °, meet clinically the needs of drawing for lower limb abduction position, realize Meet the physiologico-anatomic outer tilted direction traction of lower limb, compared to traditional hitch frame, therapy rehabilitation effect is become apparent from.

4, the utility model passes through setting telescopic rod I, telescopic rod II and telescopic rod III, installation of the telescopic rod III on pedestal Position can carry out slidable adjustment, manually adjust or automatically adjust telescopic rod I, telescopic rod II or telescopic rod III, make support member The angle of horizontal direction and vertical direction increases or reduces, and horizontal support plane is raised or reduced, and then drives limb motion, can For the early functional exercise of postoperative patient, kneed early rehabilitation activity is promoted, lower limb blood circulation is effectively improved, Promote wound healing, while can effectively prevent anchylosis, force the complication such as adhesion.

5, the utility model provides a kind of multi-functional bone distraction apparatus, and the traction that can control telescopic rod III is stretched Contracting changes the traction angle of traction rope to adapt to the traction therapeutic of clinical different heights, different classification of fracture patients；According to inflation Massage bed principle is provided with a kind of manual air-cushion device, intermittent to increase, reduce the contact area for drawing limbs and air cushion, with Have the function that limbs massage improves its blood circulation and prevention of soft tissues and weighs wounded because of caused by static traction for a long time；In gas Disposable cloth pad is used on pad, is convenient for changing, and the generation of air cushion pollution and ward cross-infection is effectively prevented；The utility model Control telescopic rod I and the flexible of telescopic rod II make postoperative knee joint obtain early rehabilitation exercise, effective prevention of postoperative anchylosis The advantages that with tetanic adhesion；In addition, replace heavy sliding weight of steelyard to draw using the tensioning tractive force for adjusting component control traction rope, side Just it persistently adjusts, using the tractive force of traction rope dynamometry part measurement traction rope, display screen shows that reading is intuitive, traction rope dynamometry Part is power inductor or electronics spring balance, preferably electronics spring balance；It is sliding that traction element application elevating lever adjusts draw bar top The position of wheel saves cumbersome head of a bed fixation device, it is made more to meet clinical treatment demand, easy to operate using convenience, just It is applied in popularizing.

Detailed description of the invention

It, below will be right in order to illustrate more clearly of specific embodiment of the present invention or technical solution in the prior art Specific embodiment or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, it is described below In attached drawing be that some embodiments of the utility model are not paying creativeness for those of ordinary skill in the art Under the premise of labour, it is also possible to obtain other drawings based on these drawings.

FIG. 1 is a schematic structural view of the utility model.

Fig. 2 is partial enlargement diagram at the utility model A.

Fig. 3 is 7 structural schematic diagram of the utility model component.

Fig. 4 is 10 structural schematic diagram of the utility model component.

Fig. 5 is the utility model latching device structural schematic diagram.

Fig. 6 is 13 structural schematic diagram of the utility model component.

Fig. 7 is that the utility model adjusts component structure diagram.

Fig. 8 is 6 structural schematic diagram of the utility model component.

1 pedestal in the figure, 2 telescopic rods I, 3 telescopic rods II, 4 telescopic rods III, 5 connecting rods, 6 air cushions, 61 through-holes, 7 sliding blocks, 71 boss, 8 sliding grooves, 9 crossbeams, 10 adjustment seats, 101 mounting holes, 102 fastener holes, 103 fixed plates, 11 elevating levers, 111 gears I, 12 latching devices, 13 draw bars, 131 gears II, 132 installation through-holes, 133 grooves, 15 display screens, 16 pulleys, 17 traction ropes, 18 turn round cylinder, 181 centre bores, 19 screw rods, 191 hooks, 20 cloth pads, 21 fastening bolts I, 22 fastening bolts II, 23 fastening nuts.

Specific embodiment

As shown in figures 1-8, the utility model includes pedestal 1, the support member for being used to support limbs of patient and for drawing The traction element of limbs, the traction element include the hitch frame being mounted on pedestal 1 and are separately connected hitch frame and limbs Traction rope 17, the traction rope 17 are equipped with the adjusting component for adjusting traction rope length；

Cross bar and two cross bars of connection that the pedestal 1 installs support member by two and for installing the vertical of hitch frame Bar is constituted；

The hitch frame includes the elevating lever 11 being hinged on pedestal 1 and is connect with elevating lever 11 by latching device 12 Draw bar 13；

The latching device 12 includes the gear I 111 for being fixed on 11 side end of elevating lever, is fixed on 13 side of draw bar End and the control piece whether engaged with the matched gear II 131 of gear I 111 and control gear I 111 with gear II 131, institute State gear I 111 and gear II 131 include several rounded evenly distributed rack gears, the installation direction of the rack gear with it is described It is circular radially consistent.

The utility model gear includes the fixed plate for being separately fixed at 13 end of elevating lever 11 and draw bar, and is fixed on The rack gear of fixed plate end is fixed on the rack gear intermeshing of 13 end of elevating lever 11 and draw bar, and the gear includes gear I 111 and gear II 131；Control piece described in the utility model includes but is not limited to control whether gear I 111 is nibbled with gear II 131 It closes, also has the function of clamping and fixing elevating lever 11 and draw bar 13.

The utility model adjusts the whole height of hitch frame by setting elevating lever 11, to adapt to the patient of different height, The lead and angle that traction rope 17 can be adjusted on a large scale clinically encounter height mistake by the way that latching device 12 is arranged When high or too short patient needs to draw lower limb treatment, by adjusting control piece, gear I 111 and gear II 131 are unclamped, in turn The angle between draw bar 13 I and elevating lever 11, then locking gear I 111 and gear II 131 are adjusted, realizes 13 front of draw bar Or the adjustment at rear, it meets and clinically encounters the case where excessively high or too short patient of height needs to draw lower limb treatment, into one The lead and angle of step control traction rope 17, and the length of traction rope 17 between hitch frame and limbs is had adjusted, finally lead to The adjusting that component carries out 17 length of traction rope is overregulated, the size for completing tractive force determines that the utility model is relative to existing The determination for the discrete value of thrust that technology is drawn using traditional sliding weight of steelyard, the utility model utilize elevating lever 11,12 and of latching device Direction, angle and size that component determines the tractive force in distraction procedure are adjusted, regulative mode continues and accurate, operation letter Single, therapy rehabilitation effect is more preferable.

The support member includes the telescopic rod I 2 that is mounted on pedestal 2 and telescopic rod II 3, the telescopic rod I 2 with it is flexible It is connected between bar II 3 by telescopic rod III 4, the installation direction of the telescopic rod III 4 and the placement direction of limbs are consistent, described to stretch It is connected between contracting bar III 4 by connecting rod 5, the support member further includes the air cushion 5 for placing limbs.

The utility model is all made of lock by the connection between setting telescopic rod I 2, III 4 both ends of telescopic rod II 3 and telescopic rod Tight nut is attached, and guarantees that each junction both can be fastened or be may be rotated, in the stabilization disposition for guaranteeing device The angular adjustment between support member and pedestal 1 is realized under condition, adapts to the traction therapeutic of different limbs lengths, telescopic rod III is the bottom of at Installation site on seat can carry out slidable adjustment, manually adjust or automatically adjust, telescopic rod I 2, telescopic rod II 3 or telescopic rod III 4, increase or reduce the angle of support member horizontal direction and vertical direction, horizontal support plane is raised or reduced, in turn Limb motion is driven, can be used for the early functional exercise of postoperative patient, kneed early rehabilitation activity is promoted, effectively changes Kind lower limb blood circulation, promotes wound healing, while can effectively prevent anchylosis, force the complication such as adhesion.

The telescopic rod II 3 is hinged on sliding block 7, and the pedestal 1 is equipped with the sliding rail 8 to match with sliding block 7, in this implementation The utility model sliding block 7 is equipped with boss 71 in example, and the pedestal 1 is equipped with the sliding rail 8 to match, and the boss 71, which is equipped with, to be used In the through-hole for passing through fastening bolt I 21,8 side of sliding rail is equipped with for the strip through-hole across fastening bolt I 21, convenient tight Fixing bolt I 21 and nut determine correspondence position of the telescopic rod II 3 on pedestal 1 to limit sliding block 7 in the position of pedestal 1 It sets.

The telescopic rod I 2, telescopic rod II 3, telescopic rod III 4 and elevating lever 11 are equipped with to have and adjust it and elongate or shorten The regulating part of effect, the regulating part can select manual adjustment or motorized adjustment part, the telescopic rod I 2, telescopic rod II 3 Telescopic rod III 4 is equipped with two, and corresponding synchronize is adjusted.

The regulating part includes decelerating motor or cylinder, is carried out to guarantee that the adjusting between identical telescopic rod is synchronous, this reality Series control is used with the regulating part of two telescopic rods I 2 in novel, the regulating part of two telescopic rods II 3 uses series control, and two The regulating part of root telescopic rod III 4 use series control, telescopic rod I 2, telescopic rod II 3, telescopic rod III 4 and elevating lever 11 tune It saves part and uses Parallel Control.

The component that adjusts includes turning round cylinder 18 and being respectively provided at the screw rod 19 turning round 18 both ends of cylinder and being connected through a screw thread, this reality It include turning round cylinder 18 to be equipped with tapped with the screw rod 19 for turning round 18 both ends of cylinder, the torsion cylinder 18 is respectively provided at novel adjusting component Centre bore 181, described 19 one end of screw rod are mounted in centre bore 181, and 19 other end of screw rod is equipped with for connecting traction rope 17 hook 191.

The utility model traction rope 17 distinguishes fixed limb and installs the traction rope dynamometry part in draw bar 13, draws fathom Power part is power inductor or electronics spring balance, preferably electronics spring balance, and traction rope 17, which is equipped with, adjusts the tensioning shape of traction rope 17 The adjusting component of state, adjusting component includes turning round cylinder 18 and screw rod 19, turns round cylinder 18 and is equipped with tapped centre bore 181, centre bore Screw rod 19 is inserted at 181 both ends, and the screw thread of the screw rod 19 at both ends is inverse structure, when ensure that turning round cylinder 18 twists, adjusts component contracting Short or extension, and then 17 tensioning state of traction rope is controlled, tractive force is adjusted, and can also further reach using electronic spring balance To the effect of increasing traction, regulative mode is lasting and accurate, easy to operate, is convenient for manual control, leads relative to traditional sliding weight of steelyard The determination of the discrete value of thrust drawn, therapy rehabilitation effect are more preferable.

The elevating lever 11 is externally provided with the adjustment seat 10 for adjusting 11 rotation direction of elevating lever and angle, and the adjustment seat 10 is wrapped Include the mounting hole 101 for being inserted into elevating lever 11 and the fixed plate 103 for being mounted on adjustment seat 10 on pedestal 1, the peace It fills 101 side of hole and is equipped with fastener hole 102, the fastener hole 102 is equipped with the fastener for fastening 11 position of elevating lever.

The utility model hitch frame includes the elevating lever 11 being hinged on pedestal, and elevating lever 11 passes through on bolt and pedestal 1 Vertical pole it is hinged, may be rotated elevating lever 11, restricted 11 rotation direction of elevating lever of 11 peripheral hardware of elevating lever and angle Limit base 10, limit base 10 include the mounting hole 101 for being inserted into elevating lever 11, and mounting hole 101 uses trapezoidal groove, makes to go up and down Bar 11 can swing, and the angle to swing is 60 °, meet clinically the needs of drawing for lower limb abduction position, realize Meet the physiologico-anatomic outer tilted direction traction of lower limb, limit base 10 makes limit base 10 by utilizing bolt fastening fixed plate 103 It is mounted on pedestal 1, the fastener hole 102 of the utility model is arc, and the position for making fastener pass through elevating lever 11 is identical, is compared In traditional hitch frame, therapy rehabilitation effect is become apparent from.

The control piece includes the fastening bolt II 22 being mutually matched and fastening nut 23, the fastening bolt II 22 It sequentially passes through gear I 111 and gear II 131 and fastening nut 23 cooperates, whether nibbled convenient for control gear I 111 and gear II 131 It closes, is conducive to the swing for adjusting draw bar 13.

The draw bar 13 includes the pulley 16 that end is arranged in, is arranged in 13 side of draw bar for showing detection traction The display screen 15 of power size and the groove 133 that other end side end is arranged in, 133 bottom of the groove are equipped with gear II 131.

13 end of the utility model draw bar be equipped with pulley 16, convenient for preferably change traction rope 17 direction and will not be right Tractive force size on traction rope 17 has an impact, and the end face that draw bar 13 is located at 133 end of groove is cambered surface, the groove 133 The side opposite with 13 end face of draw bar be cambered surface, facilitate buckle structure 12 to be adjusted, display screen 15 display detection traction Power size, the size of tractive force are directly displayed on display screen 15, tractive force are quantified, and reading is more intuitive, convenient for doctor Shield personnel operate.

The air cushion 6 includes evenly distributed through-hole 61 and the inflating port for connecting inflating balloon, at the inflating port Equipped with check valve and deflation valve.

The utility model air cushion 6 is equipped with inflating port, and the inflating port passes through gas tube and inflating balloon, is equipped at inflating port Deflation valve closes deflation valve when inflation, and manual pinching inflating balloon expands inflatable cushion, increases and draws connecing for limbs Contacting surface product unclamps deflation valve after certain interval of time, releases gas, pass through air cushion 6 in this way according to actual clinical needs Interruption expands, is shrivelled, massage effect is played to traction limbs, to improve the blood circulation of traction limbs, effective prevention of soft tissues Because of the complication such as pressure sore, thrombosis or necrosis caused by static traction for a long time.

Cloth pad 20 is equipped on the air cushion 6, the setting of cloth pad can play certain thermal effect to traction limbs, and And it is ventilative, replaceable, the effective air cushion that prevents is recycled and is drawn by traction device in purulence blood or dirt contamination and ward The clinical problems such as the cross-infection risen.

The utility model provides a kind of multi-functional bone distraction apparatus, the traction that can control telescopic rod III 4 is flexible, Change the traction angle of traction rope 17 to adapt to the traction therapeutic of clinical different heights, different classification of fracture patients；According to inflation Massage bed principle is provided with a kind of manual air-cushion device, intermittent to increase, reduce the contact area for drawing limbs and air cushion 6, with Have the function that limbs massage improves its blood circulation and prevention of soft tissues and weighs wounded because of caused by static traction for a long time；In gas Disposable cloth pad 20 is used on pad 6, is convenient for changing, and the generation of air cushion 6 pollution and ward cross-infection is effectively prevented；This is practical Novel control telescopic rod I 2 and the flexible of telescopic rod II 3 make postoperative knee joint obtain early rehabilitation exercise, and effective prevention of postoperative is closed The advantages that saving stiff and tetanic adhesion；In addition, replacing heavy scale using the tensioning tractive force for adjusting component control traction rope 17 Stone roller traction, convenient lasting adjusting, using the tractive force of traction rope dynamometry part measurement traction rope 17, display screen shows that reading is intuitive, Traction rope dynamometry part is power inductor or electronics spring balance, preferably electronics spring balance；Traction element application elevating lever 11 is adjusted The position of 13 top pulley 16 of draw bar saves the fixed device of the cumbersome head of a bed, so that it is more met clinical treatment demand, apply It is convenient, it is easy to operate, convenient for popularizing application.

Basic principles, main features, and advantages of the present invention has been shown and described above.Current row The technical staff of industry is described in above embodiments and description it should be appreciated that the present utility model is not limited to the above embodiments Only illustrate the principles of the present invention, the utility model can also on the premise of not departing from the spirit and scope of the utility model There are various changes and modifications, these various changes and improvements fall within the scope of the claimed invention.The utility model is wanted Protection scope is asked to be defined by appended claims and its equivalent.

Claims (10)

1. a kind of bone distraction apparatus including pedestal (1), is used to support the support member of limbs of patient and for drawing leading for limbs Draw component, the traction element includes the hitch frame being mounted on pedestal (1) and the traction rope for being separately connected hitch frame and limbs (17), which is characterized in that the traction rope (17) is equipped with the adjusting component for adjusting traction rope length；

The hitch frame includes the elevating lever (11) being hinged on pedestal (1) and is connected with elevating lever (11) by latching device (12) The draw bar (13) connect；

The latching device (12) includes the gear I (111) for being fixed on elevating lever (11) side end, is fixed on draw bar (13) Side end and whether nibble with the matched gear II (131) of gear I (111) and control gear I (111) with gear II (131) The control piece of conjunction, the gear I (111) and gear II (131) include several rounded evenly distributed rack gears, the rack gear Installation direction with it is described circular radially consistent.

2. bone distraction apparatus as described in claim 1, which is characterized in that the support member includes being mounted on pedestal (1) Telescopic rod I (2) and telescopic rod II (3), between the telescopic rod I (2) and telescopic rod II (3) pass through telescopic rod III (4) connect, The installation direction of the telescopic rod III (4) and the placement direction of limbs are consistent, pass through connecting rod between the telescopic rod III (4) (5) it connects, the support member further includes for placing the air cushion of limbs (6).

3. bone distraction apparatus as claimed in claim 2, which is characterized in that the telescopic rod II (3) is hinged on sliding block (7), The pedestal (1) is equipped with the sliding rail (8) to match with sliding block (7).

4. bone distraction apparatus as claimed in claim 3, which is characterized in that the telescopic rod I (2), is stretched telescopic rod II (3) Bar III (4) and elevating lever (11), which are equipped with to have, adjusts its regulating part for elongating or shortening effect.

5. bone distraction apparatus as claimed in claim 4, which is characterized in that the regulating part includes decelerating motor or cylinder.

6. bone distraction apparatus as described in any one in claim 1-5, which is characterized in that the adjusting component includes turning round cylinder (18) With the screw rod (19) for being respectively provided at torsion cylinder (18) both ends and being connected through a screw thread.

7. bone distraction apparatus as described in any one in claim 1-5, which is characterized in that the elevating lever (11) is externally provided with adjusting The adjustment seat (10) of elevating lever (11) rotation direction and angle, the adjustment seat (10) include the peace for being inserted into elevating lever (11) It fills hole (101) and for adjustment seat (10) to be mounted on the fixed plate (103) on pedestal (1), mounting hole (101) side is set Have fastener hole (102), the fastener hole (102) is equipped with the fastener for fastening elevating lever (11) position.

8. bone distraction apparatus as described in any one in claim 1-5, which is characterized in that the control piece includes being mutually matched Fastening bolt II (22) and fastening nut (23), the fastening bolt II (22) sequentially pass through gear I (111) and gear II (131) cooperate with fastening nut (23).

9. bone distraction apparatus as described in any one in claim 1-5, which is characterized in that the draw bar (13) includes that setting exists The pulley (16) of end, setting are used to show the display screen (15) of detection tractive force size and are arranged in draw bar (13) side to exist The groove (133) of other end side end, groove (133) bottom are equipped with gear II (131).

10. such as the described in any item bone distraction apparatus of claim 2-5, which is characterized in that the air cushion (6) includes evenly distributed Through-hole (61) and the inflating port for connecting inflating balloon, check valve and deflation valve are equipped at the inflating port.