CN211243669U

CN211243669U - Adjustable split type pedicle screw nailing device

Info

Publication number: CN211243669U
Application number: CN201922016466.1U
Authority: CN
Inventors: 钱建清; 徐垒
Original assignee: Jiangsu Shuangyang Medical Instrument Co ltd
Current assignee: Jiangsu Shuangyang Medical Instrument Co ltd
Priority date: 2019-11-20
Filing date: 2019-11-20
Publication date: 2020-08-14
Anticipated expiration: 2029-11-20

Abstract

The application discloses adjustable split formula pedicle of vertebral arch nail goes up nail ware, pedicle of vertebral arch nail afterbody is formed with the U-shaped draw-in groove, U-shaped draw-in groove inner wall is formed with the internal thread, it includes a sliding sleeve to go up the nail ware, sliding sleeve one end surface is formed with the cooperation the internal screw thread, sliding sleeve axle center department slidable mounting has the core bar, the core bar both ends stretch out respectively in sliding sleeve, the core bar is close to the one end of external screw thread is formed with the laminating and supports hold in the boss of U-shaped draw-in groove bottom, sliding sleeve deviates from one side of external screw thread is formed with a locking piece, the locking of locking piece the core bar is followed the sliding sleeve axle center removes. The utility model discloses go up the nail ware and be removable fraction to can be adjusted the back and be suitable for different style pedicle of vertebral arch nails.

Description

Adjustable split type pedicle screw nailing device

Technical Field

The application relates to a pedicle screw nailing device, in particular to an adjustable split type pedicle screw nailing device.

Background

Pedicle screw, as shown in patent number 201530484471.X, the afterbody is formed with the U-shaped draw-in groove, and the U-shaped draw-in groove inner wall forms the internal thread for connect the nail ware, and the nail ware formula as an organic whole is gone up to current, and difficult the washing after using up and, can only cooperate the pedicle screw of a size.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an adjustable split formula pedicle of vertebral arch nail ware of nailing provides a split formula and can adjust, is applicable to the ware of nailing of different style pedicle of vertebral arch nails.

In order to achieve the above object, the present invention provides the following technical solutions.

The embodiment of the application discloses adjustable split formula pedicle screw goes up nail ware, pedicle screw afterbody is formed with the U-shaped draw-in groove, U-shaped draw-in groove inner wall is formed with the internal thread, it includes a sliding sleeve to go up the nail ware, sliding sleeve one end surface is formed with the cooperation the internal screw thread, sliding sleeve axle center department slidable mounting has the core bar, the core bar both ends stretch out respectively in sliding sleeve, the core bar is close to the one end of external screw thread is formed with the laminating and supports in the boss of U-shaped draw-in groove bottom, sliding sleeve deviates from one side of external screw thread is formed with a locking piece, the locking piece locking the core bar is followed the sliding sleeve axle center removes.

Preferably, in the adjustable detachable pedicle screw driver, two annular grooves are formed in the surface of the core rod side by side, the core rod penetrates through the locking block, and the locking block is clamped in one of the annular grooves.

More preferably, in the above adjustable and detachable pedicle screw driver, a circular hole attached to the circumferential surface of the core rod is formed on the surface of the locking block, a semicircular arc attached to the annular groove is formed on one side of the circular hole close to the inner end surface of the locking block in a protruding manner, the core rod penetrates through the circular hole, the outer end surface of the locking block protrudes from the side surface of the sliding sleeve, and the inner end surface abuts against a compression spring.

More preferably, in the adjustable detachable pedicle screw feeder, a pin hole is formed in the surface of the lock block near the outer end surface, a pin is installed in the pin hole, the diameter of the pin hole is larger than that of the pin, and a cover body is installed on the outer side of the pin by the sliding sleeve.

Preferably, in the adjustable and detachable pedicle screw nailing device, the outer surface of the core rod is provided with length scales.

Preferably, in the adjustable detachable pedicle screw nailing device, a handle is detachably sleeved outside the sliding sleeve through a circlip.

Preferably, the adjustable split pedicle screw driver further comprises a square joint, a claw is formed at one end of the square joint, the claw locks one end of the core rod, which is far away from the boss, and a locking sleeve is installed outside the claw.

Preferably, in the adjustable split pedicle screw driver, the cross section of the side of the core rod, which is far away from the boss, is polygonal.

Compared with the prior art, the utility model discloses technical scheme's advantage lies in this last nail ware for removable fraction to can adjust the back and be suitable for different style pedicle of vertebral arch nails.

Drawings

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

Fig. 1 is a front view of an adjustable detachable pedicle screw driver according to an embodiment of the present invention;

fig. 2 is a sectional view of the adjustable detachable pedicle screw driver according to an embodiment of the present invention;

FIG. 3 is an enlarged view of FIG. 2 at A;

fig. 4 is a schematic structural diagram of a lock block according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described in detail below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific 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 description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; 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 meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1-4, the adjustable detachable pedicle screw driver includes a sliding sleeve 100, an external thread 101 matched with the internal thread is formed on an outer surface of one end of the sliding sleeve 100, a core rod 200 is slidably mounted at an axis of the sliding sleeve 100, two ends of the core rod 200 respectively protrude from the sliding sleeve 100, a boss 201 attached to and abutted against the bottom of the U-shaped slot is formed at one end of the core rod 200 close to the external thread 101, a locking block 300 is formed at one side of the sliding sleeve 100 departing from the external thread 101, and the locking block 300 locks the core rod 200 to move along the axis of the sliding sleeve 100.

According to the technical scheme, the core rod can move along the axis of the sliding sleeve, the pedicle screw with the proper length is selected firstly, the length of the core rod protruding out of the sliding sleeve is adjusted according to the length of the pedicle screw, the locking block is used for locking, the connection of the inner thread and the outer thread is realized after the sliding sleeve is rotated, and the connection of the screw feeder and the pedicle screw is realized until the boss abuts against the bottom of the U-shaped clamping groove. In the technical scheme, the internal and external threaded connection only needs to be kept in short-distance connection by adjusting the proper protruding extension length of the core rod, the internal and external threaded connection is not required to be realized by rotating the sliding sleeve for a long time, the nail feeding device is adjustable, and the sliding sleeve and the core rod can be disassembled, so that the cleaning is convenient.

Furthermore, two annular grooves 202 are formed in the surface of the core rod 200, the core rod 200 penetrates through the locking block 300, and the locking block 300 is clamped in one of the annular grooves 202.

Among this technical scheme, go up the nail ware and realize two shelves and adjust, come the cooperation to use two long short sections pedicle of vertebral arch nails, annular groove cooperation short section one, another cooperation long section uses.

Further, a circular hole 301 attached to the circumferential surface of the core rod 200 is formed on the surface of the lock block 300, a semi-circular arc 302 attached to the annular groove 202 is formed on one side of the circular hole 301 close to the inner end surface of the lock block 300 in a protruding manner, the core rod 200 penetrates through the circular hole 301, the outer end surface of the lock block 300 protrudes from the side surface of the sliding sleeve 100, and the inner end surface abuts against a compression spring 303.

In the technical scheme, the sliding sleeve needs to be rotated during connection, the boss at one end of the core rod abuts against and is held in the U-shaped clamping groove and cannot rotate with the boss, in order to prevent interference between the locking block and the sliding sleeve, the circumferential surface of the core rod is attached to the circular hole, and the semicircular arc is attached to the annular groove, so that the core rod is prevented from rotating with the boss when the sliding sleeve rotates, namely the locking block locks the core rod to slide along the axis of the sliding sleeve, but the locking block rotates around the circumferential direction of the core rod. The locking piece realizes locking when the semicircle is attached to the annular groove under the action of the compression spring, and the core rod slides freely when pressed.

Further, a pin hole 305 is formed on the surface of the lock block 300 near the outer end surface, a pin 304 is installed in the pin hole 305, the diameter of the pin hole 305 is larger than that of the pin 304, and a cover 306 is installed outside the pin 304 on the sliding sleeve 100.

In this technical scheme, the pin diameter is less because the locking piece can not be restricted by the pin when pressing. The cover body and the pin enable the whole device to be more stable.

Further, the outer surface of the core rod 200 is provided with long and short scales 203.

In the technical scheme, a user can select the gears conveniently and visually.

Further, a handle 103 is detachably sleeved outside the sliding sleeve 100 through a circlip 102.

In the technical scheme, the operation is convenient.

Further, the square connector 400 is further included, a claw part 401 is formed at one end of the square connector 400, the claw part 401 locks one end of the core bar 200, which is far away from the boss 201, and a locking sleeve 402 is installed outside the claw part 401.

In this technical scheme, the square joint is used for fixing other instruments.

Further, the cross-sectional shape of the side of the core rod 200 facing away from the boss 201 is polygonal.

In the technical scheme, the follow-up rotation of the square joint during rotation can be prevented.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The foregoing is directed to embodiments of the present application and it is noted that numerous modifications and adaptations may be made by those skilled in the art without departing from the principles of the present application and are intended to be within the scope of the present application.

Claims

1. The adjustable and detachable pedicle screw nailing device is characterized in that the pedicle screw nailing device comprises a sliding sleeve, an external thread matched with the internal thread is formed on the outer surface of one end of the sliding sleeve, a core bar is slidably mounted at the axis of the sliding sleeve, two ends of the core bar respectively protrude from the sliding sleeve, a boss attached to and abutted against the bottom of the U-shaped clamping groove is formed at one end, close to the external thread, of the core bar, a locking block is formed on one side, away from the external thread, of the sliding sleeve, and the locking block locks the core bar to move along the axis of the sliding sleeve.

2. The adjustable split pedicle screw driver according to claim 1, wherein two annular grooves are formed in the surface of the core rod side by side, the core rod penetrates through the locking block, and the locking block is clamped in one of the annular grooves.

3. The adjustable and detachable pedicle screw driver according to claim 2, wherein a circular hole attached to the circumferential surface of the core rod is formed on the surface of the locking block, a semicircular arc attached to the annular groove is formed on one side of the circular hole close to the inner end surface of the locking block in a protruding manner, the core rod penetrates through the circular hole, the outer end surface of the locking block protrudes from the side surface of the sliding sleeve, and the inner end surface abuts against a compression spring.

4. The adjustable split pedicle screw feeder according to claim 3, wherein a pin hole is formed in the surface of the lock block near the outer end face, a pin is installed in the pin hole, the diameter of the pin hole is larger than that of the pin, and a cover is installed on the outer side of the pin of the sliding sleeve.

5. The adjustable split pedicle screw driver according to claim 1, wherein the outer surface of the core rod is provided with length scales.

6. The adjustable split pedicle screw driver according to claim 1, wherein a handle is detachably sleeved outside the sliding sleeve through a circlip.

7. The adjustable split pedicle screw driver according to claim 1, further comprising a square joint, wherein a claw is formed at one end of the square joint, the claw locks one end of the core rod, which is far away from the boss, and a locking sleeve is installed outside the claw.

8. The adjustable split pedicle screw driver according to claim 7, wherein a side of the core rod facing away from the boss is polygonal in cross-sectional shape.