CN110772310A

CN110772310A - Nail feeding device and working method thereof

Info

Publication number: CN110772310A
Application number: CN201911214580.3A
Authority: CN
Inventors: 吴建明; 李颖强; 金刘承
Original assignee: Changzhou Spico Medical Equipment Co Ltd
Current assignee: Changzhou Spico Medical Equipment Co Ltd
Priority date: 2019-12-02
Filing date: 2019-12-02
Publication date: 2020-02-11
Anticipated expiration: 2039-12-02
Also published as: CN110772310B

Abstract

The invention belongs to the technical field of medical instruments, and particularly relates to a nail feeding device and a working method thereof, wherein the nail feeding device comprises: the screw rod, fix the threaded sleeve that is set up in the outside of the screw rod, locate at the pressing sleeve, boot outside the threaded sleeve separately, steel ball between pressing sleeve and threaded sleeve; wherein the pressing sleeve is fixedly connected with the sheath; a plurality of clamping grooves are separately formed in the outer side of the threaded sleeve; a bulge is arranged in the middle of the inner side of the pressing sleeve; and adjusting the length of the threaded sleeve extending out of the sheath, then pushing the pressing sleeve to enable the steel ball to roll to a position between the protrusion and any clamping groove and be clamped tightly, and locking the threaded sleeve and the sheath to prevent the upper screw rod from stretching. Can go up the nail to the pedicle of vertebral arch screw of different length, not only strengthen the degree of holding to the pedicle of vertebral arch screw, still improve the application scope of going up the nail ware.

Description

Nail feeding device and working method thereof

Technical Field

The invention belongs to the technical field of medical instruments, and particularly relates to a nail feeding device and a working method thereof.

Background

The internal spinal fixation technology is widely applied at present, and is mainly applied to the aspects of spinal trauma, spondylolisthesis, degenerative diseases and the like. In the spinal internal fixation operation, pedicle screws with different lengths need to be implanted for different wound sites. To enhance the holding of the pedicle screws, generally, short pedicle screws need to match the short upper screw rod; long pedicle screws need to match long superior screw rods. Therefore, the adjustment of the protruding length of the upper nail rod plays a crucial role in the operation.

Disclosure of Invention

The invention aims to provide a nail feeding device and a working method thereof.

In order to solve the technical problem, the invention provides a nail feeder, comprising: the screw rod, fix the threaded sleeve that is set up in the outside of the screw rod, locate at the pressing sleeve, boot outside the threaded sleeve separately, steel ball between pressing sleeve and threaded sleeve; wherein the pressing sleeve is fixedly connected with the sheath; a plurality of clamping grooves are separately formed in the outer side of the threaded sleeve; a bulge is arranged in the middle of the inner side of the pressing sleeve; and adjusting the length of the threaded sleeve extending out of the sheath, then pushing the pressing sleeve to enable the steel ball to roll to a position between the protrusion and any clamping groove and be clamped tightly, and locking the threaded sleeve and the sheath to prevent the upper screw rod from stretching.

Further, the outside of sheath is equipped with the silica gel cover.

Further, a clamp spring is arranged on the inner side of the sheath; the outer side of the threaded sleeve is provided with a corresponding step surface; when the thread sleeve retracts, the clamp spring is abutted against the step surface so as to be in a compressed state.

Further, the nailing device further comprises: the quick-change square is fixedly connected to the end part of the upper nail rod, the ratchet component is sleeved on the outer side of the quick-change square, and the rotary cover is installed on the ratchet component; the threaded sleeve is pushed or pulled back through the quick-change square to adjust the length of the threaded sleeve extending out of the sheath, and then the screw cap is rotated to enable the ratchet component to lock the quick-change square so as to prevent the upper nail rod from rotating.

Furthermore, a pressing sleeve movement gap is reserved between the ratchet component and the pressing sleeve; a pressing sleeve spring is arranged at the movement gap of the pressing sleeve; when the steel ball rolls to a position between the bulge and any clamping groove and is clamped, the pressing sleeve spring is in a natural state.

Further, the ratchet assembly includes: the ratchet seat is positioned at the joint of the upper nail rod and the quick-change square, the ratchet sleeve is arranged on the outer side of the ratchet seat, the ratchet is positioned on the inner side of the ratchet seat, the ratchet pin is positioned on the end side of the ratchet, and the ratchet buckle is arranged on the ratchet pin; the rotary cover is clamped between the ratchet seat and the quick-change square and is propped against the ratchet buckle; and the rotary cover is rotated, and the ratchet buckle rotates around the ratchet pin and is clamped into the ratchet, so that the ratchet component is locked in the quick-change square.

Furthermore, a flange is arranged on the outer side of one end, close to the upper nail rod, of the quick-change square; a limiting ring is arranged on the inner side of the ratchet seat; and the limiting ring is clamped between the flange and the ratchet to prevent the quick-change square from being separated from the ratchet seat.

Furthermore, a clamping groove is formed in the inner side of one end, close to the upper nail rod, of the quick-change square; the upper nail rod is suitable for being inserted and fixed in the clamping groove.

In another aspect, the present invention also provides a working method of a nail feeder, including: the steel ball rolls to a position between the bulge and any clamping groove and is clamped tightly by pushing the pressing sleeve, so that the length of the threaded sleeve extending out of the sheath is adjusted, and the upper nail rod is prevented from stretching.

The screw feeder and the working method thereof have the advantages that the steel balls roll to the space between the bulge and any clamping groove and are clamped tightly by pushing the pressing sleeve, so that the length of the thread sleeve extending out of the sheath is adjusted, the extension of the screw feeding rod is prevented, pedicle screws with different lengths can be fed, the holding degree of the pedicle screws is enhanced, the application range of the screw feeder is also expanded, particularly in the fixation operation in a spine, different screw feeders do not need to be replaced according to the length of the pedicle screws, convenience is brought to the operation, and the screw feeder and the working method thereof have the advantages of convenience in use, safety and reliability.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic view of a tacker of the present invention;

FIG. 2 is a cross-sectional view of the tacker of the present invention;

FIG. 3 is a side view of the ratchet assembly of the present invention;

in the figure: the quick-change nail comprises an upper nail rod 1, a threaded sleeve 2, a clamping groove 21, a step surface 22, a pressing sleeve 3, a protrusion 31, a pressing sleeve spring 32, a vacant position 33, a sheath 4, a silica gel sleeve 41, a clamp spring 42, a steel ball 5, a quick-change square 6, a flange 61, a clamping groove 62, a ratchet component 7, a ratchet seat 71, a ratchet sleeve 72, a ratchet 73, a ratchet pin 74, a ratchet buckle 75, a limiting ring 711 and a screwing cover 8.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

FIG. 1 is a schematic view of the tacker of the present invention.

FIG. 2 is a cross-sectional view of the tacker of the present invention.

As shown in fig. 1 and 2, the present embodiment 1 provides a tacker, including: the nail fixing device comprises an upper nail rod 1, a threaded sleeve 2 fixedly sleeved on the outer side of the upper nail rod 1, a pressing sleeve 3 and a sheath 4 which are respectively positioned on the outer side of the threaded sleeve 2, and a steel ball 5 between the pressing sleeve 3 and the threaded sleeve 2; wherein the pressing sleeve 3 is fixedly connected with the sheath 4; a plurality of clamping grooves 21 are separately arranged on the outer side of the threaded sleeve 2; the middle part of the inner side of the pressing sleeve 3 is provided with a bulge 31; and adjusting the length of the threaded sleeve 2 extending out of the sheath 4, then pushing the pressing sleeve 3 to enable the steel ball 5 to roll to a position between the protrusion 31 and any clamping groove 21 and be clamped tightly, and locking the threaded sleeve 2 and the sheath 4 to prevent the upper nail rod 1 from stretching.

Specifically, as shown in fig. 2, when the length of the threaded sleeve 2 extending out of the sheath 4 needs to be adjusted, the pressing sleeve 3 can be pushed manually to move backwards (in the direction of F1 in fig. 2), so that the steel ball 5 rolls away from the bottom of the protrusion 31 and is located in the vacant site 33 on the side of the protrusion 31, then the threaded sleeve is pulled manually, so that the steel ball 5 is located in the next slot 21, the length of the threaded sleeve 2 extending out of the sheath 4 is adjusted, then the pressing sleeve is reset, the steel ball 5 rolls to the position between the protrusion 31 and the slot 21 and is clamped, the threaded sleeve 2 and the sheath 4 are locked, and the nail feeding rod 1 cannot stretch out and retract.

Preferably, as shown in fig. 2, a silicone sleeve 41 is disposed on the outer side of the sheath 4, so as to have the best compatibility with the skin and improve the comfort of holding.

Optionally, a clamp spring 42 is arranged on the inner side of the sheath 4; the outer side of the thread bush 2 is provided with a corresponding step surface 22; when the threaded sleeve 2 retracts, the clamp spring 42 is abutted against the step surface 22 and is in a compressed state, so that the retraction amount of the threaded sleeve can be further prevented or reduced, and the buffering performance of the upper nail rod can be improved.

The last nail ware of this embodiment 1 makes the steel ball roll to protruding and arbitrary draw-in groove between and the chucking through promoting the pressure cover, with the length that the sheath was stretched out to the regulation thread bush, and prevent that the nail pole is flexible, can go on nailing to the pedicle of vertebral arch screw of different length, not only strengthened the degree of holding to the pedicle of vertebral arch screw, the application scope of going up the nail ware has still been improved, especially in backbone internal fixation operation, need not change different last nail ware according to the length of pedicle of vertebral arch screw, for the operation provides convenience, and the device has the advantages of convenient to use, safety and reliability.

Example 2

Referring to fig. 1 and 2, on the basis of embodiment 1, the tacker of embodiment 2 further comprises: the quick-change square device comprises a quick-change square 6 fixedly connected to the end of an upper nail rod 1, a ratchet component 7 sleeved outside the quick-change square 6, and a rotary cover 8 arranged on the ratchet component 7; the threaded sleeve 2 is pushed or pulled back by the quick-change square 6 to adjust the length of the threaded sleeve 2 extending out of the sheath 4, and then the screw cap 8 is rotated to enable the ratchet component 7 to lock the quick-change square 6 so as to prevent the upper nail rod 1 from rotating back.

Preferably, as shown in fig. 2, a pressing sleeve movement gap is left between the ratchet component 7 and the pressing sleeve 3; a pressing sleeve spring 32 is arranged at the position of the movement gap of the pressing sleeve; when the steel ball 5 rolls between the protrusion 31 and any one of the slots 21 and is clamped, the pressing sleeve spring 32 is in a natural state. When the pressing sleeve 3 is pushed to move backwards, the pressing sleeve spring 32 is in a compressed state to generate rebound force, and the pressing sleeve can be assisted to reset, so that the steel ball 5 rolls between the protrusion 31 and the clamping groove 21 and is clamped. Can effectively prevent the pressing sleeve from loosening in the use process, and improves the stability of the upper nail rod.

The last nail ware of this embodiment 2 passes through the ratchet subassembly and pins the quick change four directions, and then locks the pole of going up the nail, can effectively prevent to go up the pole of the nail and circle round, can not produce the pole of going up when guaranteeing to screw the pedicle of vertebral arch nail and rock or not hard up phenomenon, has improved the stability of the pole of going up the nail.

Figure 3 is a side view of the ratchet assembly of the present invention.

As an alternative embodiment of the ratchet assembly.

Referring to fig. 1, 2 and 3, the ratchet assembly 7 comprises: a ratchet seat 71 positioned at the joint of the upper nail rod 1 and the quick-change square 6, a ratchet sleeve 72 arranged outside the ratchet seat 71, a ratchet 73 positioned inside the ratchet seat 72, a ratchet pin 74 positioned at the end side of the ratchet 73, and a ratchet buckle 75 arranged on the ratchet pin 74; the rotary cover 8 is clamped between the ratchet seat 72 and the quick-change square and is propped against the ratchet buckle 75; the cap 8 is rotated and the ratchet catch 75 is rotated about the ratchet pin 74 and snapped into the ratchet teeth 73 to lock the ratchet assembly 7 to the quick-change hub 6.

Optionally, referring to fig. 2, the quick-change square 6 is provided with a flange 61 at the outer side of one end close to the upper nail rod 1; a limiting ring 711 is arranged on the inner side of the ratchet seat 71; and the stop ring 711 is clamped between the flange 61 and the ratchet teeth 73 to prevent the quick-change square 6 from being separated from the ratchet seat 71.

Optionally, referring to fig. 2, a clamping groove 62 is formed in the quick-change square 6 at the inner side of one end close to the upper nail rod 1; the upper screw rod 1 is suitable for being inserted and fixed in the clamping groove 62, so that the quick-change square is locked through the ratchet assembly, the rotation of the upper screw rod is further prevented, particularly, the rotation after the screw is screwed, and the pedicle screw and the upper screw rod 1 are effectively prevented from being loosened in the screwing process by matching the ratchet 73 and the ratchet buckle 75.

According to the ratchet component of the embodiment, the rotary cover is rotated, the ratchet buckle is clamped into the ratchet around the ratchet pin, so that the ratchet component is locked in the quick-change four directions, the upper nail rod is locked, and the ratchet component has the advantages of being simple in structure, high in locking speed and good in locking effect.

Example 3

On the basis of the above embodiment, the present embodiment provides a working method of a nail feeder, including: the steel ball rolls to a position between the bulge and any clamping groove and is clamped tightly by pushing the pressing sleeve, so that the length of the threaded sleeve extending out of the sheath is adjusted, and the upper nail rod is prevented from stretching.

For the specific implementation process, reference is made to the relevant discussion in the above embodiments, which is not described herein again.

In summary, according to the screw feeder and the working method thereof, the steel ball rolls to a position between the bulge and any clamping groove and is clamped tightly by pushing the pressing sleeve, so that the length of the threaded sleeve extending out of the sheath is adjusted, the screw feeding rod is prevented from stretching, and the screw feeding can be carried out on pedicle screws with different lengths; the quick-change square is locked through the ratchet component, so that the upper screw rod is locked, and the upper screw rod can be effectively prevented from rotating, so that the phenomena of expansion, rotation, shaking and the like of the upper screw rod can be avoided when the pedicle screw is screwed, and the stability of the upper screw rod is improved. Not only strengthened the degree of holding to the pedicle of vertebral arch nail, still improved the application scope of going up the nail ware, especially in the internal fixation operation of backbone, need not change different last nail ware according to the length of pedicle of vertebral arch screw, for the operation provides convenience, had convenient to use, safe and reliable's advantage.

The components selected for use in the present application (components not illustrated for specific structures) are all common standard components or components known to those skilled in the art, and the structure and principle thereof can be known to those skilled in the art through technical manuals or through routine experimentation.

In the description of the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units is only one logical division, and there may be other divisions when actually implemented, and for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection of devices or units through some communication interfaces, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.

In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. A tacker, comprising:

the screw rod, fix the threaded sleeve that is set up in the outside of the screw rod, locate at the pressing sleeve, boot outside the threaded sleeve separately, steel ball between pressing sleeve and threaded sleeve; wherein

The pressing sleeve is fixedly connected with the sheath;

a plurality of clamping grooves are separately formed in the outer side of the threaded sleeve;

a bulge is arranged in the middle of the inner side of the pressing sleeve; and

the length of the threaded sleeve extending out of the sheath is adjusted, then the pressing sleeve is pushed, the steel ball rolls to a position between the protrusion and any clamping groove and is clamped tightly, and the threaded sleeve and the sheath are locked to prevent the upper screw rod from stretching.

2. The tacker according to claim 1,

and a silica gel sleeve is arranged on the outer side of the sheath.

3. The tacker according to claim 1,

a clamp spring is arranged on the inner side of the sheath;

the outer side of the threaded sleeve is provided with a corresponding step surface;

when the thread sleeve retracts, the clamp spring is abutted against the step surface so as to be in a compressed state.

4. The tacker according to claim 1,

the nail feeding device further comprises: the quick-change square is fixedly connected to the end part of the upper nail rod, the ratchet component is sleeved on the outer side of the quick-change square, and the rotary cover is installed on the ratchet component;

the threaded sleeve is pushed or pulled back through the quick-change square to adjust the length of the threaded sleeve extending out of the sheath, and then the screw cap is rotated to enable the ratchet component to lock the quick-change square so as to prevent the upper nail rod from rotating.

5. The tacker according to claim 4,

a pressing sleeve movement gap is reserved between the ratchet component and the pressing sleeve;

a pressing sleeve spring is arranged at the movement gap of the pressing sleeve;

when the steel ball rolls to a position between the bulge and any clamping groove and is clamped, the pressing sleeve spring is in a natural state.

6. The tacker according to claim 4,

the ratchet assembly includes: the ratchet seat is positioned at the joint of the upper nail rod and the quick-change square, the ratchet sleeve is arranged on the outer side of the ratchet seat, the ratchet is positioned on the inner side of the ratchet seat, the ratchet pin is positioned on the end side of the ratchet, and the ratchet buckle is arranged on the ratchet pin;

the rotary cover is clamped between the ratchet seat and the quick-change square and is propped against the ratchet buckle;

and the rotary cover is rotated, and the ratchet buckle rotates around the ratchet pin and is clamped into the ratchet, so that the ratchet component is locked in the quick-change square.

7. The tacker according to claim 6,

a flange is arranged on the outer side of one end, close to the upper nail rod, of the quick-change square;

a limiting ring is arranged on the inner side of the ratchet seat; and

the limiting ring is clamped between the flange and the ratchet to prevent the quick-change square from being separated from the ratchet seat.

8. The tacker according to claim 4,

a clamping groove is formed in the quick-change square at the inner side of one end, close to the upper nail rod;

the upper nail rod is suitable for being inserted and fixed in the clamping groove.

9. A working method of a nail feeder is characterized by comprising the following steps:

the steel ball rolls to a position between the bulge and any clamping groove and is clamped tightly by pushing the pressing sleeve, so that the length of the threaded sleeve extending out of the sheath is adjusted, and the upper nail rod is prevented from stretching.