CN209018915U - A kind of bone-cement type screw blade - Google Patents

Abstract

The utility model discloses a kind of bone-cement type screw blades, including circular knife pipe, tail pipe, interior plug screw, lantern ring, sealing ring, casing, slide plate.Also disclose a kind of bone-cement type screw blade push rod.The utility model has the advantages that the utility model structure is simple below utility model has reached, easy to assembly, processing easy to produce；The utility model increases the leakproofness of screw blade using sealing ring, lantern ring；There is sliding slot in circular knife pipe, slide plate can slide in the slot of landslide, and cooperation push plate can push bone cement, and injection effect can be realized using common bone cement injector.

Description

A kind of bone-cement type screw blade

Technical field

The utility model category the field of medical instrument technology, more particularly to a kind of bone-cement type screw blade.

Background technique

In the surgical operation for the treatment of fracture, it will usually fix fracture site using to intramedullary nail.In clinical application when When patient's osteoporosis, the fixed contact surface of screw is small, and holding power is poor, so that position portion is gradually reversed pine by external force for a long time It is de-, it easily leads to intramedullary nail and rotates and axial dipole field, delay bone healing process, expected fixed effect cannot be played. Therefore method of the bone cement in conjunction with intramedullary nail is taken at present to increase the contact surface of intramedullary nail and bone cavity, but in the prior art, The intramedullary nail of bone cement can be injected, and structure is complicated, it is difficult to processing and production, and need when to bone cement is injected in intramedullary nail plus The bone cement injector of die mould improves the difficulty and injection cost of injection.

Summary of the invention

The purpose of this utility model, which is that, overcomes existing technical problem, provides a kind of bone-cement type screw blade.

In order to achieve the above objectives, the utility model bone-cement type screw blade is implemented according to following technical scheme:

A kind of bone-cement type screw blade, including circular knife pipe, tail pipe, interior plug screw, lantern ring, sealing ring, casing, slide plate；

The circular knife pipe is hollow tubular；The circular knife tube head is spiral cutter head；On the spiral cutter head outer wall There is through-hole；It is connected in the through-hole and circular knife pipe pipe；There is sliding slot on the circular knife pipe inside pipe wall；Circular knife pipe tail portion There are interior step, outer step；

The tail pipe is hollow tubular；The tail pipe includes step A, step B, step C；The step A and interior step phase Mutually cooperation；At least one groove on the step B；

The lantern ring is annular shape, and ring cross-section is rectangle；The set ring set cooperates on step A with interior step； The sealing ring quantity is consistent with groove number；The sealing ring is inserted in groove；

Described sleeve pipe is hollow tubular；Described sleeve pipe covers outside circular knife pipe and tail pipe；The circular knife pipe and tail pipe It is threadedly coupled by step B with outer step；The sealing ring outer diameter and casing inner tubal wall cooperate；

The slide plate includes circular slab, sliding connector；There is injection orifice among the circular slab；The sliding connector can It cooperates with sliding slot；The slide plate can be slided in circular knife pipe by sliding slot.

Preferably, the circular knife pipe, tail pipe, interior plug screw, casing are metal material.

Preferably, lantern ring, sealing ring are elastic material.

Preferably, the slide plate is high performance ceramic material or metal material.

The utility model additionally provides a kind of technical solution of bone-cement type screw blade push rod:

A kind of bone-cement type screw blade push rod, the push rod include head and connecting rod；The head is plectane；Institute Stating plectane size can cooperate with circular knife pipe bore；The connection shank diameter is less than circular knife pipe bore；The head Portion is fixedly connected with connecting rod.

The utility model action principle is as follows:

The utility model circular knife pipe, tail pipe, interior plug screw, lantern ring, sealing ring, casing, slide plate.Circular knife pipe, tail pipe, set The structure of pipe is simple, easy to process.The lantern ring being inserted on tail pipe step A plays the axial force between enhancing circular knife pipe and tail pipe Effect, to increase the sealing performance between tail pipe and circular knife pipe.Circular groove on tail pipe can robust seal circle position It sets, the sliding of sealing ring is prevented, while the presence of sealing ring enhances the sealing function between tail pipe and casing, to prevent When injecting bone cement, bone cement exposes from junction.There is sliding slot inside circular knife pipe, slide plate can slide in sliding slot.It is sliding There is injection orifice on plate, usable bone cement injector injects bone cement into circular knife pipe, and after injection, push rod can be used Slide plate is pushed, so that the bone cement in circular knife pipe can be injected into bone cavity out of circular knife tube head through-hole.

The utility model reached it is following the utility model has the advantages that

The utility model structure is simple, easy to assembly, processing easy to produce；The utility model is come using sealing ring, lantern ring Increase the leakproofness of screw blade；There is sliding slot in circular knife pipe, slide plate can slide in the slot of landslide, and cooperation push plate can push bone water Injection effect can be realized using common bone cement injector in mud.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of the utility model；

Fig. 2 is the sectional view along line B-B of Fig. 1；

Fig. 3 is the sectional view along line A-A of Fig. 1；

Fig. 4 is the structural schematic diagram of the utility model circular knife pipe；

Fig. 5 is the structural schematic diagram of the utility model tail pipe；

Fig. 6 is the structural schematic diagram of the utility model slide plate；

Fig. 7 is the structural schematic diagram of the utility model push rod；

Fig. 8 uses schematic diagram for the utility model push rod.

In figure: 1, circular knife pipe；2, tail pipe；3, interior plug screw；4, lantern ring；5, sealing ring；6, casing；7, slide plate；8, round Sliding slot；9, spiral cutter head；10, through-hole；11, interior step；12, outer step；13, step A；14, step B；15, step C；16, ditch Slot；17, circular slab；18, injection orifice；19, sliding connector；20, push rod；21, head；22, connecting rod；23, bone cement.

Specific embodiment

The utility model will be further described below with reference to the accompanying drawings and specific embodiments, in the signal of this utility model Property embodiment and explanation be used to explain the utility model, but be not intended to limit the scope of the present invention.

Embodiment 1

A kind of bone-cement type screw blade as shown in Figures 1 to 6, including circular knife pipe 1, tail pipe 2, interior plug screw 3, lantern ring 4, Sealing ring 5, casing 6, slide plate 7.

Circular knife pipe 1 is hollow tubular, has round sliding slot 8 on 1 inside pipe wall of circular knife pipe.1 head of circular knife pipe is spiral Cutter head 9 has through-hole 10 on 9 outer wall of spiral cutter head, and through-hole 10 manages interior be connected to circular knife pipe 1.There is interior step in 1 tail portion of circular knife pipe 11, outer step 12.Tail pipe 2 is hollow tubular, including step A13, step B14, step C15, and step A13 and interior step 11 are mutually Cooperate, there are two grooves 16 on step B14.

Lantern ring 4 is the annulus that section is rectangle, is covered on step A13, and is cooperated with interior step 11.Sealing ring 5 has It two, is inserted in the groove 16 of step B14 respectively.

Casing 6 is hollow tubular, is covered outside circular knife pipe 1 and tail pipe 2.Circular knife pipe 1 and tail pipe 2 pass through step B14 It is threadedly coupled with outer step 12,5 outer diameter of sealing ring and 6 inner tubal wall of casing cooperate.

Slide plate 7 includes circular slab 17, sliding connector 19.There is injection orifice 18 among circular slab 17, sliding connector 19 wraps Sphere and cylinder are included, sliding connector 19 can cooperate with round sliding slot 8.Slide plate 7 can be by round sliding slot 8 in circular knife Sliding in pipe 1.

Wherein, circular knife pipe 1, tail pipe 2, interior plug screw 3, casing 6 are metal material；Lantern ring 4, sealing ring 5 are silica gel material； Slide plate 7 is high performance ceramic material.

Embodiment 2

A kind of bone-cement type screw blade push rod 20 as shown in Figure 7, including head 21 and connecting rod 22.Head 21 is circle Plate, plectane size can cooperate with 1 bore of circular knife pipe, and 22 diameter of connecting rod is less than 1 bore of circular knife pipe, head 21 It is fixedly connected with connecting rod 22.

It is illustrated in figure 8 push rod 20 and pushes slide plate 7, bone cement 23 is pushed at the through-hole 10 of spiral cutter head 9 by slide plate 7 to overflow Out, bone cement 23 is contacted can with bone cavity.

The limitation that the technical solution of the utility model is not limited to the above specific embodiments, all skills according to the present utility model The technology deformation that art scheme is made, each falls within the protection scope of the utility model.

Claims (5)

1. a kind of bone-cement type screw blade, it is characterised in that: including circular knife pipe, tail pipe, interior plug screw, lantern ring, sealing ring, set Pipe, slide plate；

The circular knife pipe is hollow tubular；The circular knife tube head is spiral cutter head；Have on the spiral cutter head outer wall logical Hole；It is connected in the through-hole and circular knife pipe pipe；There is sliding slot on the circular knife pipe inside pipe wall；In circular knife pipe tail portion has Step, outer step；

The tail pipe is hollow tubular；The tail pipe includes step A, step B, step C；The step A and interior step phase interworking It closes；At least one groove on the step B；

The lantern ring is annular shape, and ring cross-section is rectangle；The set ring set cooperates on step A with interior step；It is described Sealing ring quantity is consistent with groove number；The sealing ring is inserted in groove；

Described sleeve pipe is hollow tubular；Described sleeve pipe covers outside circular knife pipe and tail pipe；The circular knife pipe and tail pipe pass through Step B is threadedly coupled with outer step；The sealing ring outer diameter and casing inner tubal wall cooperate；

The slide plate includes circular slab, sliding connector；There is injection orifice among the circular slab；The sliding connector can be with cunning Slot cooperates；The slide plate can be slided in circular knife pipe by sliding slot.

2. a kind of bone-cement type screw blade according to claim 1, it is characterised in that: the circular knife pipe, tail pipe, interior Plug screw, casing are metal material.

3. a kind of bone-cement type screw blade according to claim 2, it is characterised in that: lantern ring, sealing ring are elastic material Material.

4. a kind of bone-cement type screw blade according to claim 3, it is characterised in that: the slide plate is high-performance ceramic Material or metal material.

5. a kind of bone-cement type screw blade push rod, it is characterised in that: the push rod includes head and connecting rod；The head For plectane；The plectane size can cooperate with circular knife pipe bore；The connection shank diameter is less than in circular knife pipe pipe Diameter；The head is fixedly connected with connecting rod.