CN112022320A - Threaded hole protection device and bone fracture plate comprising same - Google Patents

Abstract

The invention provides a threaded hole protection device and a bone plate including the same. The threaded hole protection device includes: a locking sleeve, which has a first end and a second end along the length direction, and is provided with a penetrating first end and a second end. A through hole at the second end; the locking sleeve includes a head section on the first end side and a locking section on the second end side, the locking section is screwed into the threaded hole of the structure to be shaped; the outer wall of the locking sleeve is provided with an expansion groove , one end of the expansion groove is an open end set at the second end of the locking sleeve; the locking piece, when fixed in the through hole, can laterally open the outer wall of the locking sleeve. In the present invention, the locking sleeve and the locking piece are installed into the locking threaded hole, and the locking threaded hole is reinforced vertically and laterally, so that the locking threaded hole will not be deformed when the bone plate is shaped in any direction and bent. .

Description

A threaded hole protection device and a bone plate containing the same

technical field

The invention belongs to the technical field of medical auxiliary products, and in particular relates to a threaded hole protection device and a bone plate comprising the same.

Background technique

The bone plate of the reconstructed locking bone plate is provided with at least one locking threaded hole, wherein a bone screw with an external thread on the head can be screwed into it, which can play the role of axial compression and internal support.

During the shaping of the bone plate, the formed threaded hole may be deformed with the shaping of the bone plate, from a round shape to a lemon shape, and the thread is damaged at the same time, so that the bone screw cannot be screwed into the locking threaded hole, and the screw cap and the bone plate hole cannot be locked. , thereby failing to achieve locking effect, affecting fracture reduction and prolonging operation time.

SUMMARY OF THE INVENTION

The present invention is proposed to solve the problems existing in the prior art, and its purpose is to provide a threaded hole by installing the locking sleeve and the locking member into the threaded hole of the to-be-shaped structure, and the threaded hole is reinforced vertically and horizontally, so that the A screw hole protection device and a bone plate containing the screw hole protection device that will not deform the screw hole when the bone plate is shaped in any direction or bent.

In order to achieve the above object, technical scheme of the present invention is as follows:

A threaded hole protection device comprising:

The locking sleeve has a first end and a second end along the length direction, and is provided with a through hole passing through the first end and the second end; the locking sleeve includes a head section on the first end side and a locking sleeve on the second end side The locking section is screwed into the threaded hole of the structure to be shaped; the outer wall of the locking sleeve is provided with an expansion groove, and one end of the expansion groove is an open end provided at the second end of the locking sleeve;

When the locking piece is fixed in the through hole, it can laterally support the outer wall of the locking sleeve.

Further, the head section is located outside the threaded hole to be bent.

Further, a plurality of expansion grooves are evenly distributed on the outer wall of the locking sleeve.

Further, the other end of the expansion groove is arranged on the side wall of the head section.

Further, the through hole of the locking sleeve sequentially includes a coaxial first installation hole, a connection hole and a light hole from the first end to the second end. bore diameter.

Further, the diameters of the light holes are the same along the length direction thereof.

Further, the locking member includes a head portion and a truncated rod portion, the large diameter end of the truncated rod portion is connected with the head portion, and the head portion is threadedly connected with the connecting hole.

Further, the head of the locking piece is provided with a second mounting hole.

Further, the threaded hole of the structure to be shaped is a tapered hole.

Further, the present invention provides a bone plate comprising the above-mentioned threaded hole protection device.

Owing to having adopted the above-mentioned scheme, the beneficial effects of the present invention are:

The threaded hole protection device and the bone plate containing the same provided by the present invention are due to the expansion grooves provided on the outer wall of the locking sleeve, the locking member can laterally open the locking sleeve, so that the threads provided on the outer surface of the locking sleeve and the threads in the threaded holes The gap between them is smaller, the occlusion is tighter, the direct damage to the thread in the threaded hole is reduced during shaping, and the protection of the threaded hole is better, so that the structure to be shaped with the threaded hole can be shaped in any direction. and bending; in addition, the expansion groove set on the outer wall of the locking sleeve enables the locking sleeve to be easily screwed into or out of the threaded hole;

The threaded hole protection device provided by the present invention and the bone plate locking sleeve including the same are in tapered thread fit with the threaded hole of the structure to be shaped, which can realize the vertical reinforcement of the threaded hole by the threaded hole protection device; The tightening sleeve is laterally stretched, so that the threaded hole protection structure is laterally reinforced for the threaded hole of the structure to be shaped; vertical reinforcement and lateral reinforcement make the threaded hole not deformed during shaping and bending in any direction. ;

The threaded hole protection device provided by the present invention and the bone plate containing the same can be used as a guide sleeve for the bone plate because the locking sleeve is a hollow structure. And because of the setting of the locking piece, even if the locking sleeve is slightly deformed after shaping, the locking block will restore the structure of the locking sleeve when it is unscrewed without affecting the guiding function; in addition, the threaded hole protection structure can be used in It is assembled on the bone plate before leaving the factory. During the operation, the shaping of the bone plate and the drilling of the bottom hole can be directly performed in sequence, which reduces the operation time.

Description of drawings

1 is a cross-sectional view of a bone plate including a threaded hole protection device provided by an embodiment of the present invention;

Fig. 2 is the structural representation of the locking sleeve in Fig. 1;

FIG. 3 is a schematic structural diagram of the locking member in FIG. 1 .

Among them: 1. Bone plate; 11. Locking threaded hole; 2. Protection device; 3. Locking sleeve; 31. First end; 32. Second end; 33. Head section; The first external thread; 36, the expansion groove; 37, the connecting hole; 38, the light hole; 39, the first internal thread; 310, the first installation hole; 4, the locking member; 41, the head; 43. The second external thread; 44. The second mounting hole.

Detailed ways

Below, the present invention will be described in detail with reference to the accompanying drawings and embodiments:

One embodiment of the present invention provides a bone plate including a threaded hole protection device. The threaded hole protection device is assembled in the locking threaded hole 11 of the bone plate 1. As shown in Figs. 1 to 3, the protection device 2 includes a locking threaded hole 11. Tight sleeve 3 and locking piece 4;

The locking sleeve 3 has a first end 31 and a second end 32 along the length direction, the locking sleeve 3 includes a head section 33 on the first end side and a locking circular truncated section 34 on the second end side, the head section 33 and the locking truncated truncated The segment 34 is arranged coaxially, and one end of the head segment 33 is provided with the large diameter end of the locking truncated truncated segment 34. The outer wall of the locking truncated truncated segment 34 is a conical surface provided with a first external thread 35, and the conical surface is in phase with the locking threaded hole 11. Matching, the locking circular truncated section 34 is screwed into the locking threaded hole 11, and the side wall on the second end 32 side of the locking sleeve 3 is provided with at least one expansion groove 36 along its length direction, preferably with a plurality of evenly distributed, For example, 2, 3, 4 or 6, etc., one end of the expansion groove 36 is an open end provided at the second end 32 of the locking sleeve 3, and the locking sleeve 3 is provided with a penetrating hole through the first end 31 and the second end 32. A through hole, the through hole includes a first installation hole 310 , a connection hole 37 and a light hole 38 connected in sequence along the length direction of the locking sleeve 3 , the inner diameter of the connection hole 37 is smaller than the inner diameter of the first installation hole 310 and the inner diameter of the connection hole 37 is larger than the light hole 38 In terms of inner diameter, the connecting hole 37 is provided with a first inner thread 39. Preferably, the light hole 38 has the same diameter along its longitudinal direction.

Specifically, the side wall of the locking truncated truncated section 34 is a threaded surface that is threadedly matched with the locking threaded hole 11. The surface can be set according to the surface of the locking threaded hole 11, such as a conical surface or a cylindrical surface. The tightening sleeve 3 can reinforce the locking threaded hole 11 and its inner thread in the circumferential direction to realize vertical locking. The side wall of the second end side of the locking sleeve 3 is provided with an expansion groove 36 along its length direction, so that the locking sleeve 3 can be easily screwed into the locking threaded hole 11; It can be reset, and it is convenient for the locking sleeve 3 to be screwed out of the locking threaded hole 11.

The locking member 4 includes a head 41 and a rod 42 connected with the head 41. The head 41 is a cylindrical structure, the rod 42 is a truncated cone, and the large diameter end of the rod 42 is connected to the end face of the head 41. The outer wall of the part 41 is provided with a second external thread 43, the head 41 is screwed into the connecting hole 37, the second external thread 43 is matched with the first internal thread 39, and the diameter of the light hole 38 of the locking sleeve 3 is smaller than that of the rod part 42. The diameter of the diameter end is larger than the diameter of the small diameter end of the rod portion 42 .

The outer wall of the head 41 is provided with a second external thread 43, and the head 41 can be screwed into the connecting hole 37; , and when the head 41 of the locking member 4 is screwed into the connecting hole 37 of the locking sleeve 3, the rod portion 42 can laterally open the side wall on the side of the second end 32 of the locking sleeve 3, and the locking sleeve 3 second The side wall on the end 32 side can abut against the inner wall of the locking screw hole 11 to achieve tight engagement between the thread of the locking screw hole 11 and the first external thread 35 and between the first internal thread 39 and the second external thread 43 .

There is a gap between the head of the locking sleeve 3 and the locking threaded hole 11 , and the rod 42 of the locking member 4 is a truncated cone. As the head 41 is screwed into the connecting hole 37 of the locking sleeve 3, the rod 42 can be easily Screw into the light hole 38 of the locking sleeve 3, and the rod portion 42 can gradually spread the side wall on the second end 32 side of the locking sleeve 3 laterally, so that the side wall on the second end 32 side of the locking sleeve 3 abuts the locking thread The inner wall of the hole 11 reduces the gap between the first external thread 35 and the internal thread of the locking threaded hole 11, and realizes the locking between the internal thread of the threaded hole 11 and the first external thread 35, the first internal thread 39 and the second external thread 43 At the same time, the direct damage to the inner thread of the locking threaded hole 11 is reduced, the rigidity of the protection device 2 is improved, and the bone plate 1 provided with the locking threaded hole 11 can be shaped and bent in any direction.

Since the locking sleeve 3 and the locking member 4 need to have a certain rigidity, preferably the locking sleeve 3 and the locking member 4 are made of high-strength stainless steel. The reconstructed locking bone plate 1 is generally a titanium bone plate 1, and the high-strength stainless steel material has The higher stiffness and yield strength can protect the locking threaded hole 11 from being shaped and bent when subjected to external forces.

Further, as shown in FIG. 1 , the length of the locking circular truncated section 34 is not shorter than the thickness of the bone plate 1 , so that the locking threaded holes 11 can all be screwed to the locking circular truncated section 34 , and the locking sleeve 3 can be integrated with the locking threaded hole 11 . Reinforce. The other end of the expansion groove 36 is arranged on the side wall of the head section 33. When the rod portion 42 is installed in the light hole 38 of the locking sleeve 3, the rod portion 42 can laterally stretch the side wall of the locking circular truncated section 34 including the corresponding locking screw hole 11. , to achieve tight engagement between the entire internal thread of the locking threaded hole 11 and the first external thread 35 .

1 and 2 , the inner hole of the locking sleeve 3 sequentially includes a coaxial first installation hole 310 , a connection hole 37 and an optical hole 38 from the first end 31 to the second end 32 . The hole 310 facilitates screwing the locking sleeve 3 into the locking threaded hole 11 . The inner diameter of the connection hole 37 is smaller than the inner diameter of the first installation hole 310 and the inner diameter of the connection hole 37 is larger than the inner diameter of the light hole 38 . In addition, the present invention can not only protect the threaded holes, because each section of the inner hole of the locking sleeve 3 is arranged coaxially, the light hole 38 with the smallest inner diameter is a cylindrical hole or a conical hole, so that the inner hole of the locking sleeve 3 is Easy to drill into the bottom hole and simplify the backup tool. Specifically, after the locking member 4 is unscrewed and the locking sleeve 3 is screwed out, the expansion groove 36 can be reset, which is beneficial to realize the bottom hole drill guiding function.

Further, as shown in FIG. 1 and FIG. 3 , the end face of the first end side of the head 41 is provided with a second mounting hole 44 , which is convenient for screwing the locking sleeve 3 into the locking threaded hole 11 .

Specifically, as shown in FIG. 2 and FIG. 3 , the first mounting hole 310 and the second mounting hole 44 adopt an inner square hole, an inner hexagonal hole or an inner star hole, and the locking sleeve 3 can use an inner hexagon wrench or an inner four corner correspondingly. The wrench or inner star wrench is locked in the locking threaded hole 11 , and the locking member 4 can be locked in the inner hole of the locking sleeve 3 correspondingly by using an inner hexagonal wrench, an inner square wrench or an inner star wrench.

The protection device 2 can be assembled in the locking threaded hole 11 before leaving the factory. As shown in FIG. 1 , the bone plate 1 can be directly bent and punched in sequence during the operation, so as to shorten the operation time.

The following describes the operation steps when the protective device 2 is assembled in the bone plate and its use in the present invention with reference to the accompanying drawings:

St1 Use a wrench to install and lock the locking sleeve 3 in the locking threaded hole 11 of the bone plate 1. The locking sleeve 3 can circumferentially reinforce the locking threaded hole 11 and its internal thread to achieve vertical locking.

St2 uses a wrench to screw the head 41 into the connecting hole 37 of the locking sleeve, so that the rod 42 of the locking piece 4 is screwed into the light hole 38 of the locking sleeve and gradually spreads the side wall of the second end side of the locking sleeve 3 laterally. Make the side wall of the second end side of the locking sleeve 3 abut the inner wall of the locking threaded hole 11, reduce the gap between the first external thread 35 and the internal thread of the locking threaded hole 11, and realize the locking of the internal thread of the threaded hole 11 and the first external thread. The tight engagement between the threads 35 and the first inner thread 39 and the second outer thread 43 reduces the direct damage to the inner thread of the locking threaded hole 11, improves the rigidity of the protection device 2, and enables the locking threaded hole 11 to be provided. The bone plate 1 can be shaped and bent in any direction.

St3 screw the locking sleeve 3 and the locking piece 4 into each locking threaded hole 11 on the bone plate 1 according to the steps of St1 and St2.

St4, use bending forceps to bend and shape the bone plate 1 as required.

In St5, the shaped bone plate 1 is placed at the position of the patient's fracture, and the bone plate 1 is positioned with the Kirschner's needle, and then the locking member 4 is taken out.

St6 first use a drill bit to drill the bottom hole by relying on the locking sleeve 3 of each locking threaded hole 11 in turn, then take out the locking sleeve 3, and then screw the locking screw into each locking threaded hole 11 in turn to complete the bone plate 1. Fixation of the patient's fracture site.

The bone plate including the threaded hole protector can have the following advantages:

Due to the expansion groove set on the outer wall of the locking sleeve, the locking piece can laterally open the locking sleeve, so that the gap between the thread provided on the outer surface of the locking sleeve and the thread in the threaded hole is smaller, and the occlusion is tighter. The direct damage to the thread in the threaded hole is reduced, and the protection of the threaded hole is better, so that the structure to be shaped with the threaded hole can be shaped and bent in any direction; in addition, the expansion groove set on the outer wall of the locking sleeve The locking sleeve can be easily screwed into or out of the threaded hole;

The locking sleeve cooperates with the threaded hole of the structure to be molded in a tapered thread, which can realize the vertical reinforcement of the threaded hole by the threaded hole protection device; at the same time, the locking piece laterally stretches the locking sleeve, so that the threaded hole protection structure is to be molded. The threaded holes of the shaped structure are laterally reinforced; the vertical reinforcement and the lateral reinforcement make the threaded holes not deformed during shaping and bending in any direction;

Because the locking sleeve is a hollow structure, it can be used as a guide sleeve for the bone plate. The same set of instruments can not only protect the threaded hole, but also realize the purpose of drilling the bottom hole; The locking sleeve is slightly deformed. When the locking block is unscrewed, the structure of the locking sleeve will be restored without affecting the guiding function. In addition, the threaded hole protection structure can be assembled on the bone plate before leaving the factory, and can be directly followed by the operation during the operation. Shape the bone plate and drill the bottom hole to reduce the operation time.

The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the present invention. Inside.

Claims (10)

1. A threaded hole protector, characterized in that the threaded hole protector comprises:

the locking sleeve is provided with a first end and a second end along the length direction and is provided with a through hole penetrating through the first end and the second end; the locking sleeve comprises a head section at the first end side and a locking section at the second end side, and the locking section is screwed in a threaded hole of the structure to be shaped; an expansion groove is formed in the outer wall of the locking sleeve, and one end of the expansion groove is an open end arranged at the second end of the locking sleeve;

the locking piece can transversely strut the outer wall of the locking sleeve when being fixed in the through hole.

2. Threaded hole protection device according to claim 1, characterized in that the head section is located outside the threaded hole to be bent.

3. The threaded hole protector of claim 1, wherein a plurality of expansion grooves are evenly distributed on the outer wall of the locking sleeve.

4. A threaded hole protector as claimed in claim 1 in which the other end of the expansion slot is in the head section side wall.

5. The threaded hole protection device of claim 1, wherein the through hole of the locking sleeve comprises a first mounting hole, a connecting hole and a unthreaded hole which are coaxial in sequence from the first end to the second end, wherein the inner diameter of the connecting hole is smaller than that of the first mounting hole, and the inner diameter of the connecting section is larger than that of the unthreaded hole.

6. A threaded hole protector as claimed in claim 5 in which the unthreaded hole is of the same diameter along its length.

7. The threaded hole protector of claim 5, wherein the retaining member includes a head portion and a frustoconical shank portion, the large diameter end of the frustoconical shank portion being connected to the head portion, the head portion being in threaded connection with the attachment hole.

8. The threaded hole protector of claim 1, wherein the head of the retaining member is provided with a second mounting hole.

9. The threaded hole protector as claimed in claim 1, wherein the threaded hole of the structure to be shaped is a tapered hole.

10. A bone plate comprising the screw hole protector of any one of claims 1-9.

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