阅读说明：本技术 一种可变角度空心无头加压螺钉 (Variable angle hollow headless compression screw ) 是由 吴志伟 于 2019-10-10 设计创作，主要内容包括：本发明公开一种可变角度空心无头加压螺钉,包括前段螺钉和后段螺钉,前段螺钉和后段螺钉上分别形成有连接头和安装槽,连接头和安装槽能活动连接在一起使得前段螺钉能相对后段螺钉转变角度,连接头的端面上开设有一轴向凹孔,后段螺钉中开设有轴向通孔,轴向通孔能供起子前端上的第一作用部能穿过安装槽并与前段螺钉的轴向凹孔相配合,且同时后段螺钉能与起子的第二作用部相配合,使通过起子能带动前段螺钉和后段螺钉同步转动。本发明的前段螺钉能相对后段螺钉转变角度,通过起子将前段螺钉和后段螺钉分别拧入关节两侧的骨头上进行关节融合手术后,关节是可以在一定范围内转变角度进行活动,进而能提高患者的接骨舒适性。(The invention discloses a hollow headless compression screw with variable angles, which comprises a front section screw and a rear section screw, wherein a connector and a mounting groove are respectively formed on the front section screw and the rear section screw, the connector and the mounting groove can be movably connected together to ensure that the front section screw can change angles relative to the rear section screw, an axial concave hole is formed in the end surface of the connector, an axial through hole is formed in the rear section screw, a first action part on the front end of a screw driver can penetrate through the mounting groove and is matched with the axial concave hole of the front section screw, and meanwhile, the rear section screw can be matched with a second action part of the screw driver, so that the front section screw and the rear section screw can be driven to synchronously rotate by the screw driver. The front section screw can change the angle relative to the rear section screw, and after the front section screw and the rear section screw are respectively screwed into bones at two sides of a joint through a screwdriver to perform joint fusion, the joint can change the angle to move within a certain range, so that the bone-knitting comfort of a patient can be improved.)

1. The utility model provides a hollow headless forcing screw of variable angle which characterized in that: including anterior segment screw (1) and back end screw (2), be formed with connector (11) and mounting groove (21) respectively on anterior segment screw (1) and back end screw (2), connector (11) and mounting groove (21) can swing joint together make anterior segment screw (1) can be relative back end screw (2) change angle, an axial shrinkage pool (111) has been seted up on the terminal surface of connector (11), axial through hole (22) have been seted up in back end screw (2), first effect portion (31) on axial through hole (22) can supply bottle opener (3) front end can pass mounting groove (21) and cooperate with axial shrinkage pool (111) of anterior segment screw (1), and back end screw (2) can cooperate with second effect portion (32) of bottle opener (3) simultaneously, make and can drive anterior segment screw (1) and back end screw (2) synchronous rotation through bottle opener (3), and then make joint both sides on the bone head respectively with twisting anterior segment screw (1) and back end screw (2), make joint both sides Can be moved to improve the bone-knitting comfort.

2. The variable angle hollow headless compression screw of claim 1, wherein: the end of the connector (11) is provided with a flange part (112) with an outer diameter larger than that of the connector (11), the flange part (112) can be fittingly clamped into the mounting groove (21), and an inward-contracting inverted buckle part (211) is formed at the upper end of the mounting groove (21) to movably limit the flange part (112) in the mounting groove (21).

3. The variable angle hollow headless compression screw of claim 2, wherein: the external diameter of connector (11) slightly is less than the bore of back-off portion (211), makes and leaves the space of stepping down that the relative mounting groove (21) turned angle of connector (11) formed the connector (11) between connector (11) and back-off portion (211).

4. The variable angle hollow headless compression screw of claim 3, wherein: the inner wall of the mounting groove (21) is provided with a first inclined surface (212) and a second inclined surface (213) which are adjacent to each other, an accommodating space with a large middle and small two ends is formed in the mounting groove (21) through the matching of the first inclined surface (212) and the second inclined surface (213), and the flange portion (112) can be limited in the accommodating space and can change an angle relative to the mounting groove (21) through the matching of the first inclined surface (212), the second inclined surface (213) and the flange portion (112).

5. The variable angle hollow headless compression screw according to any one of claims 1 to 4, characterized in that: the cross sections of the first acting part (31) and the second acting part (32) of the screwdriver (3) are in a straight shape or a cross shape or a hexagon shape, and the cross section of the axial concave hole (111) of the front section screw (1) is in a straight shape or a cross shape or a hexagon shape matched with the first acting part (31) of the screwdriver (3).

6. The variable angle hollow headless compression screw of claim 5, wherein: axial through hole (22) of back end screw (2) are the in-line or cross or the hexagon with second effect portion (32) looks adaptation of bottle opener (3), when first effect portion (31) of bottle opener (3) insert axial shrinkage pool (111) of anterior segment screw (1) in form spacing cooperation, second effect portion (32) can insert simultaneously and form spacing cooperation in axial through hole (111) of back end screw (2), make and can drive anterior segment screw (1) and back end screw (2) synchronous rotation through bottle opener (3).

7. The variable angle hollow headless compression screw of claim 5, wherein: offer on the rear end portion of back end screw (2) with axial through hole (22) coaxial setting mating holes (23), the transversal font or cross or the hexagon of personally submitting with second effect portion (32) looks adaptation of bottle opener (3) of mating holes (23), when first effect portion (31) of bottle opener (3) insert axial shrinkage pool (111) of anterior segment screw (1) in form spacing cooperation, second effect portion (32) can insert simultaneously and form spacing cooperation in mating holes (23) of back end screw (2), make and can drive anterior segment screw (1) and back end screw (2) synchronous rotation through bottle opener (3).

8. The variable angle hollow headless compression screw according to any one of claims 1 to 4, characterized in that: the outer diameters of the front section screw (1) and the rear section screw (2) are gradually enlarged from the front end to the rear end to form a structure with a small front part and a large rear part.

Technical Field

The invention relates to the technical field of surgical medical instruments, in particular to a hollow headless compression screw with a variable angle.

Background

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a variable-angle hollow headless compression screw, which mainly solves the technical problems that after the existing headless compression hollow screw with an integrated structure is adopted to fix bones on two sides of a joint, the joint cannot move, a patient feels uncomfortable and the like.

In order to achieve the purpose, the invention is realized by the following technical scheme:

The utility model provides a hollow headless forcing screw of variable angle, including anterior segment screw and back end screw, be formed with connector and mounting groove on anterior segment screw and the back end screw respectively, connector and mounting groove can swing joint make anterior segment screw can relative back end screw change angle together, an axial shrinkage pool has been seted up on the terminal surface of connector, set up axial through-hole in the back end screw, axial through-hole can supply the first effect portion on the bottle opener front end can pass the mounting groove and cooperate with the axial shrinkage pool of anterior segment screw, and the back end screw can cooperate with the second effect portion of bottle opener simultaneously, the messenger can drive anterior segment screw and back end screw synchronous rotation through the bottle opener, and then twist anterior segment screw and back end screw respectively and make the joint can move about in order to improve the coaptation travelling comfort on the bone of joint both sides.

Further, be formed with the flange portion that the external diameter is greater than the connector on the tip of connector, the flange portion can block into the mounting groove with the adaptation, and be formed with the inside back-off portion that contracts in order to keep spacing the flange portion activity in the mounting groove on the mounting groove upper end.

Furthermore, the external diameter of the connector is slightly less than the bore of the back-off part, so that a gap is reserved between the connector and the back-off part to form a yielding space of the connector relative to the installation groove with a turning angle.

Furthermore, be equipped with adjacent first inclined plane and second inclined plane on the mounting groove inner wall, the accommodation space that the centre is big, both ends are little is formed through the cooperation on first inclined plane and second inclined plane in the mounting groove, and makes flange portion can be spacing in the accommodation space and can be relative mounting groove angle of change through the cooperation of first inclined plane and second inclined plane and flange portion.

Furthermore, the cross sections of the first acting part and the second acting part of the screwdriver are in a straight shape or a cross shape or a hexagon shape, and the cross section of the axial concave hole of the front section screw is in a straight shape or a cross shape or a hexagon shape matched with the first acting part of the screwdriver.

Further, the axial through hole of back end screw is the line shape or cross or the hexagon with the second effect looks adaptation of bottle opener, and when the first effect portion of bottle opener inserted the axial shrinkage pool of anterior segment screw in and formed spacing cooperation, the second effect portion can form spacing cooperation in inserting the axial through hole of back end screw simultaneously, makes and can drive anterior segment screw and back end screw synchronous rotation through the bottle opener.

furthermore, the rear end part of the rear section screw is provided with a matching hole which is coaxial with the axial through hole, the cross section of the matching hole is in a straight shape or a cross shape or a hexagon shape which is matched with the second action part of the screw driver, when the first action part of the screw driver is inserted into the axial concave hole of the front section screw to form limiting matching, the second action part can be simultaneously inserted into the matching hole of the rear section screw to form limiting matching, and the screw driver can drive the front section screw and the rear section screw to synchronously rotate.

Furthermore, the outer diameters of the front section screw and the rear section screw are gradually enlarged from the front end to the rear end to form a structure with a small front part and a large rear part.

The angle-variable hollow headless compression screw has the following advantages:

The front section screw and the rear section screw are respectively provided with a connector and a mounting groove, the connector and the mounting groove can be movably connected together to enable the front section screw to change the angle relative to the rear section screw, and further form two sections of movably connected split structures, an axial concave hole is formed in the end face of the connector, an axial through hole is formed in the rear section screw, a first action part on the front end of the screw driver can penetrate through the mounting groove and is matched with the axial concave hole of the front section screw through the axial through hole, when the screw driver is inserted in place, the first action part is matched with the axial concave hole, the rear section screw can be matched with a second action part of the screw driver at the same time, the screw driver can drive the front section screw and the rear section screw to synchronously rotate, and then the front section screw and the rear section screw are respectively screwed into bone heads on two sides of the joint to enable the.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Fig. 2 is a partial sectional view of fig. 1.

Fig. 3 is a partially enlarged view of a portion a in fig. 2.

FIG. 4 is a schematic structural view of a front end screw angled relative to a rear end screw in accordance with an embodiment of the present invention.

Fig. 5 is a partial cross-sectional view of fig. 4.

Fig. 6 is a partially enlarged view of fig. 5 at B.

FIG. 7 is a schematic view of the structure of the bones on either side of the joint according to an embodiment of the present invention.

Fig. 8 is a schematic structural view of the driver.

Fig. 9 is a schematic structural view of a hollow headless compression screw of the prior art.

Description of reference numerals:

1. Anterior segment screw, 2, back end screw, 3, bottle opener, 4, prefabricated hole, 11, connector, 21, mounting groove, 22, axial through hole, 23, mating holes, 31, first effect portion, 32, second effect portion, 111, axial shrinkage pool, 112, flange portion, 211, back-off portion, 212, first inclined plane, 213, second inclined plane.

Detailed Description

The invention is further described with reference to the following figures and examples.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and 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.

Referring to fig. 1 to 8, in this embodiment, a variable angle hollow headless compression screw includes a front section screw 1 and a rear section screw 2, the front section screw 1 and the rear section screw 2 are respectively formed with a connector 11 and a mounting groove 21, the connector 11 and the mounting groove 21 can be movably connected together to make the front section screw 1 capable of changing an angle relative to the rear section screw 2, an axial recess 111 is formed on an end surface of the connector 11, an axial through hole 22 is formed in the rear section screw 2, the axial through hole 22 can allow a first action portion 31 on a front end of a driver 3 to pass through the mounting groove 21 and to be matched with the axial recess 111 of the front section screw 1, and simultaneously the rear section screw 2 can be matched with the second acting part 32 of the screw driver 3, so that the front section screw 1 and the rear section screw 2 can be driven by the screw driver 3 to rotate synchronously, and then the front section screw 1 and the rear section screw 2 are respectively screwed into the bone at two sides of the joint so that the joint can move to improve the bone-knitting comfort.

In this embodiment, the front section screw 1 and the rear section screw 2 are respectively formed with a connector 11 and a mounting groove 21, the connector 11 and the mounting groove 21 can be movably connected together to make the front section screw 1 turn angle relative to the rear section screw 2, so as to form a split structure with two sections of movable connections, an axial concave hole 111 is formed on the end surface of the connector 11, an axial through hole 22 is formed in the rear section screw 2, the axial through hole 22 can allow a first acting portion 31 on the front end of the driver 3 to pass through the mounting groove 21 and to be matched with the axial concave hole 111 of the front section screw 1, and when the driver 3 is inserted in place to make the first acting portion 31 match with the axial concave hole 111, the rear section screw 2 can be simultaneously matched with a second acting portion 32 of the driver 3, so that the driver 3 can drive the front section screw 1 and the rear section screw 2 to synchronously. When the variable-angle hollow headless compression screw of the embodiment is used for performing the joint fusion operation, firstly, a prefabricated hole 4 which penetrates through the joint and extends to the bone on one side of the joint is drilled on the bone on the other side of the joint (the drilling process is a conventional technical means in the joint fusion operation, and the specific drilling method is not described herein), then the first acting part 31 on the front end of the screw driver 3 is extended into the axial through hole 22 of the section screw 2 until the first acting part 31 penetrates out of the rear section screw 2 and is inserted into the axial concave hole 111 of the front section screw 1 from the mounting groove 21 to form the limit fit, meanwhile, the rear section screw 2 and the second acting part 32 of the screw driver 3 form the limit fit, at the moment, the front section screw 1 and the rear section screw 2 are in a straight line shape, under the driving of the screw driver 3, the front section screw 1 and the rear section screw 2 can be screwed in from the opening of the prefabricated hole 4, and the front section screw 1 and the rear section screw 2 are respectively connected to, because the anterior screw 1 and the posterior screw 2 are movably connected together through the connector 11 and the mounting groove 21, after the variable-angle hollow headless compression screw of the embodiment is used for joint fusion, the joint can be changed in angle within a certain range for movement, and then the bone-knitting comfort of a patient can be improved.

Referring to fig. 1 to 6, in the present embodiment, preferably, a flange portion 112 having an outer diameter larger than that of the connection head 11 is formed at an end portion of the connection head 11, the flange portion 112 is fittingly inserted into the mounting groove 21, and an inwardly-contracted inverted portion 211 is formed at an upper end of the mounting groove 21 to movably limit the flange portion 112 in the mounting groove 21. In this embodiment, preferably, the outer diameter of the connector 11 is slightly smaller than the caliber of the inverse-buckling portion 211, so that a gap is left between the connector 11 and the inverse-buckling portion 211 to form an abdicating space for the connector 11 to change the angle relative to the mounting groove 21. In this embodiment, preferably, the inner wall of the mounting groove 21 is provided with a first inclined surface 212 and a second inclined surface 213 which are adjacent to each other, an accommodating space with a large middle and small two ends is formed in the mounting groove 21 through the cooperation of the first inclined surface 212 and the second inclined surface 213, and the flange portion 112 can be limited in the accommodating space and can change an angle relative to the mounting groove 21 through the cooperation of the first inclined surface 212, the second inclined surface 213 and the flange portion 112.

referring to fig. 1 to 8, in the present embodiment, the cross sections of the first acting portion 31 and the second acting portion 32 of the driver 3 are in a shape of a straight line, a cross shape or a hexagon, the first acting portion 31 and the second acting portion 32 are connected by an extension rod, and the cross section of the axial concave hole 111 of the front section screw 1 is in a shape of a straight line, a cross shape or a hexagon matched with the first acting portion 31 of the driver 3. In this embodiment, preferably, the axial through hole 22 of the rear screw 2 is in a shape of a straight line, a cross or a hexagon matched with the second acting portion 32 of the driver 3, and when the first acting portion 31 of the driver 3 is inserted into the axial concave hole 111 of the front screw 1 to form a limit fit, the second acting portion 32 can be simultaneously inserted into the axial through hole 22 of the rear screw 2 to form a limit fit, so that the driver 3 can drive the front screw 1 and the rear screw 2 to rotate synchronously. In this embodiment, it is preferable that the axial through hole 22 of the rear screw 2 and the cross section of the second acting portion 32 of the driver 3 are mutually matched hexagons, and the axial concave hole 111 of the front screw 2 and the cross section of the first acting portion 31 at the front end of the driver 3 are also mutually matched hexagons, so that when the driver 3 is inserted in place, the first acting portion 31 of the driver 3 is matched with the axial concave hole 111 of the front screw 1, and the second acting portion 32 of the driver 3 is matched with the axial through hole 22 of the rear screw 2, and when the driver 3 is rotated, the driver can drive the front screw 1 and the rear screw 2 to rotate synchronously through the first acting portion 31 and the second acting portion 32. However, it should be understood by those skilled in the art that in other embodiments, the cross-section of the first acting portion 31 and the second acting portion 32 of the driver 3 may have other non-circular structures, such as a circular notched structure, an elliptical structure, a trapezoidal structure, etc., as long as when the driver 3 is inserted into the rear screw 2, the first acting portion 31 on the front end of the driver 3 and the second acting portion 32 on the extension rod of the driver 3 can form a limit fit with the axial concave hole 111 on the front screw 1 and the axial through hole 22 in the rear screw 2 respectively, so as to drive the front screw 1 and the rear screw 2 to rotate synchronously when the driver 3 is rotated.

In addition, in the present embodiment, the hole size of the axial concave hole 111 of the anterior screw 1 may be smaller than the hole size of the axial through hole 22 of the posterior screw 2 to facilitate the insertion of the driver 3 into the posterior screw 2 and the insertion of the first acting portion 31 on the front end of the driver 3 in alignment with the axial concave hole 111 of the anterior screw 1. However, it should be understood by those skilled in the art that in other embodiments, the axial recessed hole 111 may be the same size as the axial through hole 22, but in the case that the axial recessed hole 111 has the same cross section as the axial through hole 22, the size of the hole of the axial recessed hole 111 should not be larger than that of the axial through hole 22, otherwise the driver 3 may not be inserted into the position, and the front section screw 1 and the rear section screw 2 cannot be screwed into the bone synchronously.

Referring to fig. 1 and 2, in the present embodiment, the outer diameters of the front section screw 1 and the rear section screw 2 are gradually enlarged from the front end to the rear end to form a structure with a small front and a large rear.

In addition, in other embodiments, the rear end portion of the rear section screw 2 may be provided with a fitting hole 23 disposed coaxially with the axial through hole 22, the cross section of the fitting hole 23 has a shape of a straight line, a cross shape or a hexagon shape adapted to the second acting portion 32 of the driver 3, when the first acting portion 31 of the driver 3 is inserted into the axial concave hole 111 of the front section screw 1 to form a limit fitting, the second acting portion 32 can be simultaneously inserted into the fitting hole 23 of the rear section screw 2 to form a limit fitting, so that the driver 3 can drive the front section screw 1 and the rear section screw 2 to rotate synchronously.

The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and these modifications or substitutions do not make the corresponding technical solutions depart from the spirit and scope of the technical solutions of the embodiments of the present invention, so that all other embodiments obtained by those skilled in the art without making creative efforts belong to the protection scope of the present invention.