CN208942349U - A kind of high medical swell fixture of bonding strength - Google Patents

Abstract

The utility model discloses a kind of high medical swell fixtures of bonding strength.The advantages of the utility model: bone cement is successively from first through hole and the second through-hole, it flows out to outside expansion loop, there are also the grooves for bone cement flowing outside expansion loop, bone cement is evenly distributed between expansion loop and subjects bones, subjects bones and expansion loop are connected, the compactness connected between expansion loop and patient is improved, keeps the connection between swell fixture and patient more stable, extend the service life of swell fixture, while avoiding loosened screw problem caused by osteoporosis.Simultaneously without injecting bone cement in advance, it is easy the dosage of control bone cement, after the amount of injection bone cement is suitable, rotating nuts drive expansion bolt to be displaced outwardly, and then drive the expansion slot expansion of expansion bolt, expansion loop is expanded in the position of expansion slot, swell fixture is tightly secured in human body later, and first through hole and the dislocation of the second through-hole, remove the bone cement in empty slot at this time.

Description

A kind of high medical swell fixture of bonding strength

Technical field

The utility model relates to orthopaedic devices field, the high medical expanding screw of more particularly to a kind of bonding strength Nail.

Background technique

Carrying out fixation in bone using screw is the skill for being widely used in clinical medicine bone surgery within the scope of the world today Art method, current bone fixation screw and common swell fixture structure are essentially identical, with the development of astogeny society, osteoporosis And bone tumour shared ratio in orthopaedic disease is higher and higher, current swell fixture using when need to inject bone cement, to mention Bonding strength between high expansion screw and patient, but bone cement is injected in advance, the amount of injection is difficult to control, and is distributed not Uniformly, make the bonding strength between swell fixture and patient low.

Utility model content

In view of the deficienciess of the prior art, the purpose of this utility model is to provide a kind of high medical swollen of bonding strength Swollen screw.

To achieve the above object, the utility model provides following technical solution: a kind of high medical expansion of bonding strength Screw includes: expansion bolt, nut, spring washer, large washer, expansion loop, the expansion bolt partial insertion expansion loop It is interior, large washer, spring washer and nut be successively set on expansion bolt stretch out expansion loop one end, the expansion bolt it is another End is equipped with the pushing block of wedge shape, and the expansion loop offers several expansion slots, the side of the expansion bolt by one end of pushing block Face offers screw thread corresponding with nut, and the expansion bolt offers empty slot, the empty slot on the end face of pushing block Cell wall on offer several first through hole, several second through-holes, the first through hole are offered on the side wall of the expansion loop It corresponds and is interconnected with the second through-hole.

The large washer is equipped with fixing groove by the end face of expansion loop as a further improvement of the utility model, described Locating slot is offered on the other end of large washer, the expansion loop is equipped with fixed block, the fixation by the end face of large washer Block is embedded in fixing groove.

The pushing block is equipped with the second locating piece, second locating piece as a further improvement of the utility model, It can slide in insertion expansion slot and in expansion slot.

The side of the expansion bolt is equipped with the first locating piece as a further improvement of the utility model, described swollen Packing side wall is equipped with limit hole, and first locating piece is embedded in limit hole and can slide in limit hole.

The cavity of storage medical fluid is offered in the expansion bolt as a further improvement of the utility model, it is described to push away Motion block is equipped with unidirectional loading mouth, and the unidirectional loading mouth is connected to cavity, offers on the side wall of the expansion bolt and sky The control hole that chamber is connected, the interior push plate being equipped with for pressing medical fluid of the cavity, the push plate are set on the end face of medical fluid There is push rod, first locating piece penetrates control hole and is fixedly connected with push rod, and when expansion bolt is displaced outwardly, medical fluid is from unidirectional The output of loading mouth.

The beneficial effects of the utility model, bone cement successively from first through hole and the second through-hole, flows out to outside expansion loop, swollen There are also the groove for bone cement flowing outside packing, bone cement is evenly distributed between expansion loop and subjects bones, connects patient bone Bone and expansion loop improve the compactness connected between expansion loop and patient, make connection between swell fixture and patient more Stablize, extends the service life of swell fixture.Especially sufferers of osteoporosis face, swell fixture can be improved in bone cement and patient connects The intensity connect avoids loosened screw problem caused by osteoporosis.The pushing block of wedge shape improves the stability and efficiency of expansion, together Shi Wuxu injects bone cement in advance, be easy control bone cement dosage, inject bone cement amount it is suitable after, rotating nuts, drive Expansion bolt is displaced outwardly, and then drives the expansion slot expansion of expansion bolt, and expansion loop is expanded in the position of expansion slot, swollen later Swollen screw is tightly secured in human body, and first through hole and the dislocation of the second through-hole, remove the bone cement in empty slot at this time.

Detailed description of the invention

Fig. 1 is overall structure diagram of the invention；

Fig. 2 is external structure schematic diagram of the invention.

Detailed description of the invention: 1, expansion bolt；2, nut；3, spring washer；4, large washer；5, expansion loop；6, pushing block；50, Expansion slot；11, the first locating piece；51, limit hole；61, the second locating piece；41, fixing groove；42, locating slot；52, fixed block； 10, cavity；60, unidirectional loading mouth；100, control hole；101, push plate；102, push rod；12, empty slot；120, first through hole；53, Two through-holes.

Specific embodiment

The utility model is described in further detail below in conjunction with embodiment given by attached drawing.

Shown in referring to Fig.1-Fig. 2, a kind of high medical swell fixture of bonding strength of the present embodiment includes: expanding screw Bolt 1, nut 2, spring washer 3, large washer 4, expansion loop 5, in the 1 partial insertion expansion loop 5 of expansion bolt, large washer 4, bullet Spring washer 3 and nut 2 are successively set on one end that expansion bolt 1 stretches out expansion loop 5, and the other end of the expansion bolt 1 is equipped with The pushing block 6 of wedge shape, the expansion loop 5 offer several expansion slots 50, the side of the expansion bolt 1 by one end of pushing block 6 Face offers screw thread corresponding with nut 2, and the expansion bolt 1 offers empty slot 12 on the end face of pushing block 6, described Several first through hole 120 are offered on the cell wall of empty slot 12, and several second through-holes 53 are offered on the side wall of the expansion loop 5, The first through hole 120 and the second through-hole 53, which correspond, to be interconnected.

Through the above technical solutions, being first put into bone cement in empty slot 12, later when expansion loop 5 is inserted into the patient Catch bar is protruded into outside, and catch bar is inserted into empty slot 12, pushes bone cement, and bone cement is successively logical from first through hole 120 and second Hole 53 flows out to outside expansion loop 5, and there are also the groove for bone cement flowing outside expansion loop 5, bone cement is evenly distributed on expansion loop 5 Between subjects bones, subjects bones and expansion loop 5 are connected, the compactness connected between expansion loop 5 and patient is improved, makes swollen Connection between swollen screw and patient is more stable, extends the service life of swell fixture.Especially sufferers of osteoporosis face, bone water The intensity that swell fixture is connect with patient can be improved in mud, avoids loosened screw problem caused by osteoporosis.The promotion of wedge shape Block 6 improves the stability and efficiency of expansion, while without injecting bone cement in advance, being easy the dosage of control bone cement, injecting bone After the amount of cement is suitable, rotating nuts 2 drive expansion bolt 1 to be displaced outwardly, and then drive the expansion slot 50 of expansion bolt 1 swollen Swollen, expansion loop 5 is expanded in the position of expansion slot 50, and swell fixture is tightly secured in human body later, at this time 120 He of first through hole The dislocation of second through-hole 53, removes the bone cement in empty slot 12.Existing swell fixture needs to inject bone in advance in use Cement, the amount for injecting bone cement is difficult to control, and is unevenly distributed, and keeps the bonding strength between swell fixture and patient low.

As a kind of improved specific embodiment, the large washer 4 is equipped with fixing groove 41 by the end face of expansion loop 5, Locating slot 42 is offered on the other end of the large washer 4, the expansion loop 5 is equipped with fixed block by the end face of large washer 4 52, the fixed block 52 is embedded in fixing groove 41.

Through the above technical solutions, first adjusting 4 position of large washer when rotating nuts 2, fixed block 52 is made to be embedded in fixing groove 41 It is interior, the position for fixing large washer 4, and then the position of fixed expansion circle 5 are inserted into locating slot 42 using external tool later, is avoided When rotating nuts 2, expansion bolt 1 can not expand fixed situation and occur caused by rotating simultaneously with expansion loop 5, improve rotation spiral shell Mother 2 screws in the efficiency and stability of swell fixture, reduces operating time.

As a kind of improved specific embodiment, the pushing block 6 is equipped with the second locating piece 61, second positioning Block 61 is embedded in expansion slot 50 and can slide in expansion slot 50.

Through the above technical solutions, the rotation of nut 2 drives the expansion bolt 1 being threadedly coupled with it outside when rotating nuts 2 Mobile, expansion bolt 1 is displaced outwardly, and then pushing block 6 is driven to be displaced outwardly, and the second locating piece 61 on pushing block 6 is embedded in swollen In swollen slot 50 and sliding outward, the second locating piece 61 are embedded in sliding in expansion slot 50, and the nut 2 for avoiding turn drives expanding screw The problem of bolt 1 rotates, to avoid nut 2 that from cannot quickly screwing in the case where screw pulls expansion bolt 1 generation, with fixed block 52,41 collective effect of fixing groove 41 and locating slot further increases the efficiency that rotating nuts 2 screw in swell fixture, improves operation Stability.

As a kind of improved specific embodiment, the side of the expansion bolt 1 is equipped with the first locating piece 11, described 5 side wall of expansion loop is equipped with limit hole 51, and first locating piece 11 is embedded in limit hole 51 and can slide in limit hole 51.

Through the above technical solutions, swell fixture is inserted into human body when using, rotating nuts 2, nut 2 rotate band later The dynamic expansion bolt 1 being threadedly coupled with it is displaced outwardly, and expansion bolt 1 is displaced outwardly, and then pushing block 6 is driven to be displaced outwardly, During swell fixture is displaced outwardly, the first locating piece 11 slides from inside to outside in limit hole 51, first positioning of the limitation of limit hole 51 The rotation of block 11, and then the nut 2 for avoiding turn drives expansion bolt 1 to rotate, to prevent nut 2 from quickly screwing in spiral shell Nail pulls the case where expansion bolt 1 to occur, and improves the efficiency that rotating nuts 2 screw in swell fixture, reduces the time of operation.

As a kind of improved specific embodiment, the cavity 10 of storage medical fluid is offered in the expansion bolt 1, it is described Pushing block 6 is equipped with unidirectional loading mouth 60, and the unidirectional loading mouth 60 is connected to cavity 10, on the side wall of the expansion bolt 1 The control hole 100 being connected with cavity 10 is offered, the push plate 101 for pressing medical fluid is equipped in the cavity 10, it is described to push away Plate 101 is equipped with push rod 102 backwards to the end face of medical fluid, and first locating piece 11 penetrates control hole 100 and the fixed company of push rod 102 It connects, when expansion bolt 1 is displaced outwardly, medical fluid is exported from unidirectional loading mouth 60.

Through the above technical solutions, expansion bolt 1 is displaced outwardly when rotating nuts 2, drive the first locating piece 11 mobile, First locating piece 11 and limit hole 51 are inconsistent, and expansion bolt 1 continues in rotary course, and expansion bolt 1 is persistently displaced outwardly, the A positioning block 11 is limited the limit of hole 51, and the first locating piece 11 slides in control hole 100, opposite to push push rod 102 to unidirectional Loading mouth 60 is mobile, and then pushes push plate 101 mobile to unidirectional loading mouth 60, and then release medical fluid, by injecting liquid drug to patient In vivo, accelerate Rehabilitation, and liquid medicine injection is to start to inject after swell fixture dilation, avoid medical fluid outflow Situation, reduces liquid waste, and liquid medicine injection while fixed improves procedure efficiency.After being inserted into swell fixture, catch bar is pushed Extruding flows out bone cement from the lateral surface of expansion loop 5, and liquid medicine injection while rotating screw later, swell fixture insertion is fixed It is just not necessarily to shift position, and liquid medicine injection while rotating nuts 2 afterwards, reduces operating procedure, improves efficiency.

The above is only the preferred embodiment of the utility model, and the protection scope of the utility model is not limited merely to Above-described embodiment, technical solution belonging to the idea of the present invention belong to the protection scope of the utility model.It should refer to Out, for those skilled in the art, it is without departing from the principle of the utility model it is several improvement and Retouching, these improvements and modifications also should be regarded as the protection scope of the utility model.

Claims (5)

1. a kind of high medical swell fixture of bonding strength, includes: expansion bolt (1), nut (2), spring washer (3), big Washer (4), expansion loop (5), it is characterised in that: in expansion bolt (1) the partial insertion expansion loop (5), large washer (4), bullet Spring washer (3) and nut (2) are successively set on one end that expansion bolt (1) stretches out expansion loop (5), the expansion bolt (1) The other end is equipped with the pushing block (6) of wedge shape, and the expansion loop (5) offers several expansion slots (50) by the one end of pushing block (6), The side of the expansion bolt (1) offers screw thread corresponding with nut (2), and the expansion bolt (1) is backwards to pushing block (6) End face on offer empty slot (12), offer several first through hole (120), the expansion loop on the cell wall of the empty slot (12) (5) several second through-holes (53) are offered on side wall, the first through hole (120) and the second through-hole (53) correspond mutual Connection.

2. the high medical swell fixture of bonding strength according to claim 1, it is characterised in that: the large washer (4) is leaned on The end face of expansion loop (5) is equipped with fixing groove (41), offers locating slot (42), institute on the other end of the large washer (4) It states expansion loop (5) and is equipped with fixed block (52) by the end face of large washer (4), in fixed block (52) insertion fixing groove (41).

3. the high medical swell fixture of bonding strength according to claim 2, it is characterised in that: on the pushing block (6) It, and can the sliding in expansion slot (50) in the second locating piece (61) insertion expansion slot (50) equipped with the second locating piece (61).

4. the high medical swell fixture of bonding strength according to claim 3, it is characterised in that: the expansion bolt (1) Side be equipped with the first locating piece (11), expansion loop (5) side wall be equipped with limit hole (51), first locating piece (11) limit hole (51) are embedded in and can be slid in limit hole (51).

5. the high medical swell fixture of bonding strength according to claim 4, it is characterised in that: the expansion bolt (1) The cavity (10) of storage medical fluid is inside offered, the pushing block (6) is equipped with unidirectional loading mouth (60), the unidirectional loading mouth (60) it is connected to cavity (10), offers the control hole being connected with cavity (10) on the side wall of the expansion bolt (1) (100), the push plate (101) for pressing medical fluid is equipped in the cavity (10), the push plate (101) is on the end face of medical fluid Equipped with push rod (102), first locating piece (11) penetrates control hole (100) and is fixedly connected with push rod (102), works as expansion bolt (1) when being displaced outwardly, medical fluid is exported from unidirectional loading mouth (60).