WO2016114558A1

WO2016114558A1 - Structure having variable diameter

Info

Publication number: WO2016114558A1
Application number: PCT/KR2016/000301
Authority: WO
Inventors: 김두만; 이창우; 김광원
Original assignee: 주식회사 케이씨스
Priority date: 2015-01-14
Filing date: 2016-01-12
Publication date: 2016-07-21

Abstract

The present invention relates to a structure having a variable diameter, which comprises: a bolt extending along the longitudinal direction thereof; a body arranged on one side of the bolt so as to surround the bolt; a core arranged along the longitudinal direction of the bolt; a plurality of extensions radially arranged outside the core; and a plurality of outer shells surrounding the extensions so as to correspond to the extensions, wherein the extensions are extended to the outside or contracted in the direction of the center by the core according to the rotation direction of the bolt, thereby changing the diameter of the outer peripheral surface.

Description

Structure with variable diameter

The present invention relates to a structure having a variable diameter, and more particularly, by increasing and decreasing the diameter in accordance with the direction of rotation of the screw can be inserted and fixed correspondingly even if the inserted diameter is formed relatively large and conversely easy to remove It relates to a structure having a variable diameter.

In order to interconnect structures such as hollow shafts or pipes having an inner diameter and an outer diameter in the form of a donut, a separate connecting bracket is necessarily required to surround the outer diameter or be inserted into the inner diameter.

However, in the conventional case, since the connecting brackets must be matched with the outer diameter or the inner diameter, the connecting brackets corresponding to the changed diameters are required.

In addition, products that are fastened by interference fittings, such as shaft pins, have to be manufactured and installed in sizes corresponding to their diameters, thereby causing inconvenience in manufacturing.

An object of the present invention has been proposed to improve the conventional characteristics as described above, by increasing and decreasing the diameter in accordance with the rotation direction of the screw so that even if the inserted diameter is formed relatively large can be inserted and fixed correspondingly It is to provide a structure having a variable diameter for easy removal.

The present invention has the following configuration to achieve the above object.

Structures having a variable diameter of the present invention, the bolt extending along the longitudinal direction; A body disposed on one side of the bolt to surround the bolt; A core disposed along the longitudinal direction of the bolt; A plurality of extensions disposed radially outward of the core; And a plurality of shells surrounding the extension to correspond to the extension, wherein the extension extends to the outside by the core or contracts in the center direction according to the rotational direction of the bolt to vary the outer circumferential surface diameter.

And the body is composed of a guide groove that is connected to the insertion hole and the extension side is inserted into the bolt is radially guided.

In addition, the core is composed of a cylinder with a threaded hole, a plurality of slots radially extending from the outer peripheral surface of the cylinder, and slot projections protruding in a direction facing each other between the slots to expand or contract the outer diameter of the extension. do.

The slot protrusions are arranged to be inclined outward in the axial direction of the bolt.

In addition, the extension has a constant length, the guide projection is formed at the longitudinal end, the slot is formed inclined at both sides in the longitudinal direction, the slot projection is sliding guide, the wedge groove recessed along the longitudinal direction at a position perpendicular to the slot And, the wedge groove one side is composed of a wedge engaging projection formed narrow in the direction facing each other.

And the extension is formed relatively longer than the length of the core.

The sheaths are also arranged to overlap each other.

The bolt is further provided with a plurality of spacers for allowing the plurality of cores to be installed.

On the other hand, the structure having a variable diameter of the present invention, the cross-sectional shape is used to interconnect the structure having a constant size of the inner diameter in the form of a donut.

According to the present invention, the diameter increases and decreases according to the rotational direction of the screw, so that even if the diameter to be inserted is formed relatively large, it can be inserted and fixed correspondingly.

In addition, according to the present invention, it is possible to use as a nail (nail) for connecting the fractured bone.

1 is an exploded perspective view showing a structure having a variable diameter of the present invention.

2 is a perspective view showing the core and the extension shown in FIG.

3 is a perspective view showing the extension and the shell shown in FIG.

4 is a view showing a state provided with a spacer on a structure having a variable diameter according to the present invention.

5 to 8 are views showing the operating state of the structure having a variable diameter according to the present invention.

The objects, features, and advantages of the present invention described above will become more apparent through the following embodiments in conjunction with the accompanying drawings.

The following specific structures or functional descriptions are merely illustrated for the purpose of describing embodiments in accordance with the inventive concept, and embodiments according to the inventive concept may be embodied in various forms and may be described in detail herein. It should not be construed as limited to the examples.

Embodiments in accordance with the concepts of the present invention can be variously modified and have a variety of forms, specific embodiments will be illustrated in the drawings and described in detail herein. However, this is not intended to limit the embodiments in accordance with the concept of the present invention to a particular disclosed form, it should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention.

Terms such as first and / or second may be used to describe various components, but the components are not limited to the terms. The terms are only for the purpose of distinguishing one component from other components, for example, without departing from the scope of the rights according to the inventive concept, the first component may be called a second component, and For example, the second component may also be referred to as a first component.

When a component is referred to as being "connected" or "connected" to another component, it may be directly connected or connected to that other component, but it may be understood that other components may be present in the middle. Should be. On the other hand, when a component is said to be "directly connected" or "directly connected" to another component, it should be understood that no other component exists in the middle. Other expressions for describing the relationship between components, such as "between" and "immediately between" or "adjacent to" and "directly adjacent to", should be interpreted as well.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. The terms "comprise" or "having" herein are intended to indicate that there is a feature, number, step, action, component, part, or combination thereof that is practiced, and that one or more other features or numbers, It is to be understood that it does not exclude in advance the possibility of the presence or addition of steps, actions, components, parts or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art. Terms such as those defined in the commonly used dictionaries should be construed as having meanings consistent with the meanings in the context of the related art, and are not construed in ideal or excessively formal meanings unless expressly defined herein. Do not.

As shown in FIG. 1, the structure having a variable diameter of the present invention includes a body 110, a bolt 120, a core 130, an extension table 140, and an outer shell 150.

The body 110 is composed of an insertion groove 111 penetrating the cylindrical central axial direction, and guide grooves 112 formed at equal intervals along the circumference at one side axial end side, and the guide groove 112 is inside It has a tapered shape that increases in width in the direction.

The bolt 120 has a predetermined length and is formed with a trapezoidal thread on the outer peripheral surface.

As shown in FIG. 2, the core 130 has a cylindrical body 131 having a threaded hole 132 and a length the same as that of the cylindrical body 131 so that the bolt 120 can be fastened in a central axial direction. And a plurality of slots 133 extending radially from an outer circumferential surface of the cylindrical body 131, slot protrusions 134 protruding from each other on the sides of the slots 133, and an extension table 140. It is composed of an insertion groove 135 formed between the slot 133.

The slot protrusion 134 is disposed to be inclined outward from the axial direction.

The extension 140 is inserted into the insertion groove 135 between the slot 133 to operate in the insertion groove 135, the slot 141 formed in an inclined shape on both sides in the longitudinal direction, both ends in the longitudinal direction Guide protrusions 142 formed in the projection, the wedge groove 143 recessed to a predetermined depth along the longitudinal direction of the upper surface, and the wedge locking projections 144 extending in a direction facing each other inside the wedge groove 143 It consists of).

The wedge engaging protrusion 144 is inclined outward from the bottom surface of the wedge groove 143, as shown in Figure 3b, the extension 140 is the upper surface 140a and the lower surface 140b ) Are each curved.

The outer shell 150 has a curved shape having a predetermined length as shown in FIG. 3A, and includes a wedge 155 protruding downward from the bottom surface 151.

In addition, the outer shell 150 has a lower overlapping surface 154 extending stepwise from the bottom surface 155 to one side, and the upper overlapping surface 153 is formed on the upper side of the lower overlapping surface 154 diagonally. It is formed stepwise with respect to the surface 152.

That is, as shown in FIG. 3B, the outer skin is formed so that a plurality of superimpositions overlap each other to form the outermost part of the structure, so that the outer cover can be in close contact with the inserted structure while the overlapping amount changes as the outer diameter of the structure changes.

Looking at the coupling state of the present invention, first insert the bolt 120 into the insertion hole 111 of the body 110 and then screw the screw hole 132 of the core 130 to the bolt 130.

Thereafter, the plurality of extension tables 140 are positioned between the insertion grooves 135 of the core 130, and at the same time, the slot 141 is inserted into the slot protrusion 134, and the guide protrusion 142 is the body 110. To be inserted into the guide groove (112).

That is, the extension 140 is to be arranged at equal intervals along the outer circumference of the core 130.

In this state, the wedge 155 of the outer shell 150 is inserted into the wedge groove 143 formed on the upper surface 140a of the extension 140 to press the wedge projection 144 to the wedge projection 144. (155) to be bound and bound;

At this time, when the outer shell 150 is bound to the extension table 140, the lower overlapping surface 154 of the outer jacket 150 is in a state that is overlaid on the upper overlapping surface 153 of the neighboring jacket so that the expansion and contraction of the extension 150 may be mutually performed. It can slide and maintain a cylindrical shape, thereby allowing it to be in close contact with the inner diameter of the structure.

On the other hand, in the present invention has been described for explaining the extension to one core, as shown in Figure 4 when further provided with a spacer 160 formed with guide grooves 161 at both ends in the longitudinal direction to connect a plurality of cores continuously Although not shown in the drawings, it is also possible to arrange a separate triangular cone at the end to facilitate the insertion into the inner diameter side of the structure.

Hereinafter, with reference to the accompanying drawings will be described the operating state of the present invention.

First, in the structure of the present invention, the outer diameter of the body 110 and the inner side of the outer shell 150 may be disposed in a predetermined gap.

That is, as shown in FIG. 5, the slot protrusion 134 has a central portion with respect to the entire length L of the slot 141 so that a gap t is formed between the inner side of the outer shell 150 and the outer diameter of the body 110. The core 130 moves forward or backward in the axial direction of the bolt 120 according to the rotational direction of the bolt 120, and the slot protrusion 134 of the core slides forward or backward along the slot 141. The extension 140 connected to and contracted to the inside or enlarged to the contrary is made to easily cope with the inner diameter of the structure by making the diameter of the outermost outermost shell smaller or larger.

In this case, the slot protrusion 134 and the slot 141 are disposed to be inclined outward.

Referring to FIG. 6, when the outer diameter is contracted, when the bolt 120 is rotated in the direction of the arrow in the drawing, the threaded hole 131 of the core 130 is moved in the axial direction of the bolt 120 by the thread of the bolt. Arrow direction), and the slot protrusion 134 inserted into the slot 141 is inclined along the slot 141 in the process of advancing.

The expansion table 140 moves inwardly by the inclined slot protrusion 134 and the outer diameter "D" of the outer shell 150 connected to the expansion table 140 contracts to the outer diameter "D1".

At this time, since the guide protrusion 142 of the extension 140 is inserted into the guide groove 112 of the body 110, the guide protrusion 142 is guided in the state of supporting the extension in a direction perpendicular to the axial direction.

That is, the slot 141 is disposed obliquely as the core 130 is advanced along the bolt 120 is slid along the slot protrusion 134 and moved inward, and consequently the diameter of the outer shell shrinks.

On the contrary, in order to expand the outer diameter "D" of the outer shell, as shown in FIG. 7, when the bolt 120 is rotated in the opposite direction in which the bolt is rotated in FIG. 6, the core 130 moves along the bolt 130 and the body 110. The rear side (in the direction of the arrow on the drawing) to be closer to the side and the slot protrusion 134 is sliding along the slot 141.

As the slot protrusion 134 is slid along the slot 141, the extension table 140 in which the inclined slot 141 is disposed is moved outward and at the same time the outer shell 150 connected to the extension table 140. ) Outer diameter "D" is expanded to outer diameter "D2".

In addition, as shown in FIG. 8, the outer shells may be disposed to overlap each other, thereby preventing the formation of a gap in the outer diameter of the expanding or contracting and allowing the outer diameter to be in close contact with the inner diameter of the structure.

As the structure of the present invention, the outer diameter can be contracted and expanded, so that the cross-sectional shape is freely detachable due to the change in diameter when the donut-shaped pipe is connected or disassembled. In particular, when used in the nail (nail) used to connect the fractured bone in the surgical operation can prevent the impact caused to the bone during the insertion of the nail becomes effective surgery.

As mentioned above, although this invention was demonstrated through the preferable embodiment, this is only to help understanding of the technical content of this invention, and is not intended to limit the technical scope of this invention to this.

That is, those skilled in the art without departing from the technical gist of the present invention can be variously modified or modified, as well as such changes or modifications, the technical scope of the present invention in the interpretation of the claims. It is hard to say that I am within.

Claims

A bolt extending along the length direction;

A body disposed on one side of the bolt to surround the bolt;

A core disposed along the longitudinal direction of the bolt;

A plurality of extensions disposed radially outward of the core; And

Includes; a plurality of shells surrounding the extension to correspond to the extension;

The extension table is a structure having a variable diameter, characterized in that it is expanded to the outside by the core according to the rotation direction of the bolt or contracted in the central direction and the outer peripheral surface diameter is variable.
The method of claim 1,

The body is a structure having a variable diameter, characterized in that consisting of a guide groove that is connected to the insertion hole and the extension side is inserted into the bolt is radially guided.
The method of claim 1,

The core is composed of a cylinder with a threaded hole, a plurality of slots radially extending from the outer peripheral surface of the cylinder, and slot projections protruding in a direction facing each other between the slots to expand or contract the outer diameter of the extension. Structure having a variable diameter, characterized in that.
The method of claim 3,

The slot protrusion is a structure having a variable diameter, characterized in that arranged in the form inclined outward in the axial direction of the bolt.
The method of claim 3,

The extension table has a predetermined length, and guide protrusions formed at end portions in the longitudinal direction, slots formed to be inclined at both sides in the longitudinal direction to slide the slot protrusions, and wedge grooves recessed along the length direction at positions perpendicular to the slots; The structure having a variable diameter, characterized in that consisting of the wedge engaging projections formed narrower in the direction in which the one side of the wedge grooves face each other.
The method of claim 5,

The extension is a structure having a variable diameter, characterized in that formed longer than the length of the core.
The method of claim 1,

The outer shell is a structure having a variable diameter, characterized in that arranged to overlap each other.
The method of claim 1,

The bolt has a structure having a variable diameter, characterized in that the plurality of spacers further provided to enable the plurality of cores to be installed.
The structure having a variable diameter of any one of claims 1 to 8,

A structure having a variable diameter, characterized in that the cross-sectional shape is used to interconnect structures having an internal diameter of a constant size in the form of a donut.