CN213665655U

CN213665655U - Double-end pressurization hollow screw

Info

Publication number: CN213665655U
Application number: CN202021836190.8U
Authority: CN
Inventors: 黄宝琦
Original assignee: Xiamen Delangge Medical Technology Co ltd
Current assignee: Xiamen Delangge Medical Technology Co ltd
Priority date: 2020-08-28
Filing date: 2020-08-28
Publication date: 2021-07-13
Anticipated expiration: 2030-08-28

Abstract

The utility model discloses a double-end pressurization hollow screw belongs to medical instrument technical field, including screw body, screw body comprises screw cover and screwhead, screw cover and screwhead all run through on its length direction and are provided with first through-hole and second through-hole, first screw thread section, smooth section and second screw thread section have set gradually on screw cover's the lateral wall, the screw direction of first screw thread section and second screw thread section is the same, the one end of first through-hole is provided with the internal thread along its week side, the one end of screwhead is provided with the third screw thread section with internal thread matched with, the utility model has the advantages of can effectively pressurize the fracture position.

Description

Double-end pressurization hollow screw

Technical Field

The utility model relates to the technical field of medical equipment, specifically a double-end pressurization hollow screw.

Background

In the treatment of fracture, three basic principles of reduction, fixation and functional exercise are very important, wherein after reduction, the reduction is easy to be displaced due to instability, so that the reduction is fixed at a satisfactory position by adopting different methods to ensure that the reduction is gradually healed, and the fixation method comprises two methods of external fixation and internal fixation, wherein the internal fixation is mainly fixation by a steel plate, a steel needle, an intramedullary needle, a common screw, a hollow screw and the like for surgical incision.

When the existing hollow screw is used, the fracture parts on two sides are pressed tightly and then connected through the hollow screw, but the condition that the fracture parts on two sides are not tightly healed is easy to occur in the connection mode.

Therefore, the improvement is made by those skilled in the relevant technical field, for example, the chinese patent publication No. CN209360865U discloses a "multifunctional double-headed forcing screw", which includes a screw body, a front end screw body and a tail end connector are respectively provided at two ends of the screw body; the surface of the tail end connector is provided with a threaded section, the spiral direction of the threaded section is the same as that of the front end screw body, and the thread pitch of the threaded section is smaller than that of the front end screw body; the end part of the tail end connecting body, which is far away from the front end screw body, is provided with a connecting hole for connecting a power drill, the tail end connecting body is provided with an inserting hole communicated with the connecting hole in a penetrating way, and the screw body is inserted into the inserting hole; the tip that the screw body inserted in the jack is equipped with the limiting plate of contradicting with the connecting hole inner wall, though the utility model discloses a screw body closely draws together both sides fracture end, makes both sides fracture position healing inseparable, has the characteristics that reduce hollow screw is not hard up droing in fixed process.

However, the technical solution in this application document still has disadvantages, such as the front screw body and the tail end connector in the utility model are integrated, the compression effect generated when the screw body is guided into the fracture part is relatively poor, and the later fracture part recovery is easily affected.

Based on this, the utility model designs a double-end pressurization hollow screw to solve above-mentioned problem.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a double-end pressurization hollow screw to solve above-mentioned technical problem.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a double-end pressurization hollow screw, includes the screw body, the screw body comprises screw cover and screwhead, screw cover and screwhead all run through on its length direction and are provided with first through-hole and second through-hole, first screw thread section, smooth section and second screw thread section have set gradually on the lateral wall of screw cover, the screw direction in first screw thread section and second screw thread section is the same, the one end of first through-hole is provided with the internal thread along its week side, the one end of screwhead be provided with internal thread matched with third screw thread section.

Preferably, one end of the screw head, which is far away from the third thread section, is provided with a locking part, and the outer diameter of the locking part is larger than that of the third thread section.

Preferably, the locking part is hemispherical, and a plurality of tightening grooves are uniformly distributed along the peripheral side of the locking part.

Preferably, a limiting part is arranged between the locking part and the third thread section of the screw head, and the outer diameter of the limiting part is larger than that of the third thread section.

Preferably, the length of the first thread section and the length of the second thread section are both 1/5 of the total length of the screw sleeve, and the length of the smooth section is 3/5 of the total length of the screw sleeve.

Preferably, the length of the internal thread is 2/3 of the total length of the screw sleeve.

Preferably, one end of the screw sleeve far away from the screw head is provided with a tapered part, and the tapered part is gradually reduced along the direction far away from one end of the screw head penetrating into the screw sleeve.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model discloses a screw body, screw body comprises screw cover and screwhead, screw cover and screwhead all run through on its length direction and are provided with first through-hole and second through-hole, first screw thread section, smooth section and second screw thread section have set gradually on the lateral wall of screw cover, the screw direction in first screw thread section and second screw thread section is the same, the one end of first through-hole is provided with the internal thread along its week side, the one end of screwhead be provided with internal thread matched with third screw thread section.

The utility model discloses when using, at first attack the screw cover in the fracture position through first screw thread section, under the effect of first screw thread section and second screw thread section, the screw cover is fixed in fracture position department in advance, attack the screwhead in the first through-hole through the screw cover again, it attacks into to make the screwhead attack through third screw thread section and internal screw thread cooperation, further be fixed in fracture position department with the screw cover, wherein because run through on the screw head and be provided with the second through-hole, play the cushioning effect attacking the in-process, make the patient reduce pain, when the screwhead attacks the fracture position, pressurize the screw cover because its tensile force itself, make the fracture position obtain effectual pressurization effect, be favorable to the recovery in later stage.

Drawings

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

FIG. 1 is a schematic structural diagram of the present embodiment;

FIG. 2 is a sectional view showing the inner structure of the screw grommet according to the present embodiment;

fig. 3 is a sectional view showing the inner structure of the screw head according to the present embodiment.

In the drawings, the components represented by the respective reference numerals are listed below:

1. a screw body; 11. a screw sleeve; 12. a screw head; 3. a first thread segment; 4. a second thread segment; 5. an internal thread; 6. a third thread segment; 7. a locking portion; 8. screwing down the groove; 9. a tapered portion; 10. a limiting part; 13. a smooth section; 14. a first through hole; 15. a second via.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying 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 of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides a technical solution: the utility model provides a double-end pressurization hollow screw, including screw body 1, screw body 1 comprises screw cover 11 and screwhead 12, screw cover 11 and screwhead 12 all run through on its length direction and are provided with first through-hole 14 and second through-hole 15, first screw thread section 3 has set gradually on the lateral wall of screw cover 11, smooth section 13 and second screw thread section 4, the screw direction of first screw thread section 3 and second screw thread section 4 is the same, the one end of first through-hole 14 is provided with internal thread 5 along its week side, the one end of screwhead 12 is provided with the third screw thread section 6 with internal thread 5 matched with.

As shown in fig. 1 and 2, the lengths of the first thread section 3 and the second thread section 4 are 1/5 of the total length of the screw sleeve 11, the length of the smooth section 13 is 3/5 of the total length of the screw sleeve 11, and by arranging the first thread section 3 and the second thread section 4 of which the lengths are 1/5, when the screw sleeve 11 is tapped into a fracture part, the thread length of the fracture part can be reduced on the premise of ensuring stable connection, and the pain of a patient can be relieved.

As shown in fig. 1 and 2, a tapered portion 9 is provided at one end of the screw sleeve 11 away from the screw head 12, the tapered portion 9 is gradually reduced in a direction away from one end of the screw head 12 penetrating into the screw sleeve 11, and by providing the tapered portion 9, the stress area between the screw sleeve 11 and the fracture part can be reduced, the pressure can be increased, and the screw sleeve 11 can be more easily tapped.

As shown in fig. 2, the length of the internal thread 5 is 2/3 of the total length of the screw sleeve 11, and the internal thread 5 with the length of 2/3 is arranged, so that the threaded connection length between the screw sleeve 11 and the screw head 12 can be ensured, the connection between the screw head 12 and the screw head 12 is firmer, and the phenomenon that loosening affects the recovery of the fracture part is prevented.

As shown in fig. 1 and 3, a locking part 7 is arranged at one end of the screw head 12 far away from the third thread section 6, the outer diameter of the locking part 7 is larger than that of the third thread section 6, and the screw head 12 can be conveniently tapped into the fracture part through the arrangement of the locking part 7, so that the operation is simple and convenient.

Furthermore, locking portion 7 is hemispherical, and has a plurality of tightening grooves 8 along its week side evenly distributed, screws up groove 8 through setting up, can increase the frictional force between hand and locking portion 7, makes screwhead 12 attack fracture position department more easily, facilitates the use.

Further, the screw head 12 is provided with the limiting part 10 between the locking part 7 and the third thread section 6, the outer diameter of the limiting part 10 is larger than the outer diameter of the third thread section 6, the tapping distance of the screw head 12 can be limited by arranging the limiting part 10, and the screw head 12 is prevented from being tapped too deeply and influencing the later recovery.

One specific application of this embodiment is:

when the utility model is used, firstly, the screw sleeve 11 is tapped into the fracture part through the first thread section 3, under the action of the first thread section 3 and the second thread section 4, the screw sleeve 11 is pre-fixed at the fracture part, then the screw head 12 is tapped through the first through hole 14 of the screw sleeve 11, the screw head 12 is tapped through the matching of the third thread section 6 and the internal thread 5, the screw sleeve 11 is further fixed at the fracture part, because the second through hole 15 is arranged on the screw head 12 in a penetrating way, the buffering effect is achieved in the tapping process, when the screw head 12 is tapped, the friction force is increased through the locking part 7 and the screwing groove 8, the screw head 12 is easier to tap, when the screw head 12 is tapped into the fracture part, the screw sleeve 11 is pressurized due to the self-tension force, the fracture part obtains the effective pressurizing effect, wherein the tapered part 9 on the screw sleeve 11 can reduce the stress area of the screw sleeve 11 and the fracture part, the pressure is increased, so that the screw sleeve 11 is easier to attack, the limiting part 10 on the screw head 12 can limit the attack distance of the screw head 12, and the screw head 12 is prevented from being attacked too deeply to influence the later recovery.

In summary, the engagement structure of the screw cap 11 and the screw head 12 can pressurize the fracture site, thereby effectively pressurizing the fracture site.

In the description of the present invention, it is to be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "one side", "top", "inner", "front", "center", "both ends", 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 simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "disposed," "connected," "fixed," "screwed" and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through an intermediate medium, and may be connected through the inside of two elements or in an interaction relationship between two elements, unless otherwise specifically defined, and the specific meaning of the above terms in the present invention will be understood by those skilled in the art according to specific situations.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a double-end pressurization cannulated screw, includes screw body (1), its characterized in that: screw body (1) comprises screw cover (11) and screwhead (12), screw cover (11) and screwhead (12) all run through on its length direction and are provided with first through-hole (14) and second through-hole (15), first screw thread section (3), smooth section (13) and second screw thread section (4) have set gradually on the lateral wall of screw cover (11), the spiral direction of first screw thread section (3) and second screw thread section (4) is the same, the one end of first through-hole (14) is provided with internal thread (5) along its week side, the one end of screwhead (12) is provided with third screw thread section (6) with internal thread (5) matched with.

2. The double-ended compression cannulated screw of claim 1, wherein: one end, far away from the third thread section (6), of the screw head (12) is provided with a locking part (7), and the outer diameter of the locking part (7) is larger than that of the third thread section (6).

3. The double-ended compression cannulated screw of claim 2, wherein: the locking part (7) is hemispherical, and a plurality of tightening grooves (8) are uniformly distributed along the peripheral side of the locking part.

4. The double-ended compression cannulated screw of claim 2, wherein: and a limiting part (10) is arranged between the locking part (7) and the third threaded section (6) of the screw head (12), and the outer diameter of the limiting part (10) is larger than that of the third threaded section (6).

5. The double-ended compression cannulated screw of claim 1, wherein: the length of the first thread section (3) and the length of the second thread section (4) are both 1/5 of the total length of the screw sleeve (11), and the length of the smooth section (13) is 3/5 of the total length of the screw sleeve (11).

6. The double-ended compression cannulated screw of claim 1, wherein: the length of the internal thread (5) is 2/3 of the total length of the screw sleeve (11).

7. The double-ended compression cannulated screw of claim 1, wherein: one end, far away from the screw head (12), of the screw sleeve (11) is provided with a tapered portion (9), and the tapered portion (9) is gradually reduced along the direction of the end, far away from the screw head (12), penetrating into the screw sleeve (11).