KR102117964B1 - Fixing body or fixing body assembly for barrier membrane - Google Patents

Abstract

The shielding film fixing body 100 of the present invention includes a fixing part 110 that is placed and fixed to the alveolar bone, a shielding film mounting part 120 to which a shielding film is mounted, and a tool fastening part 130 to which a tool is fastened, and the shielding film mounting part 130 ) Has a neck 121 for fastening holes formed in the shielding film and a head 125 for preventing the shielding film from easily falling off.

Description

Shielding film fixing body and fixing assembly{FIXING BODY OR FIXING BODY ASSEMBLY FOR BARRIER MEMBRANE}

The present invention relates to a shielding film fixed body and a fixed assembly, and more particularly, to a shielding film fixed body and a fixed assembly capable of easily installing and separating the shielding film.

The dental shielding film is used as needed during the implant operation, and is used to create a bone regeneration space around the alveolar bone or gum so that the bone structure can be regenerated in a desired size and shape for successful implant treatment when the alveolar bone is defective.

The dental shielding film should be positioned with a space from the alveolar bone to form a bone regeneration space, and a pillar supporting the lifting of the shielding film is required. With the technology related to such a pillar, the applicant has a patent “Abutment for fixing the shielding film” No. 10-1103545, and the representative configuration is shown in FIGS. 1 and 2.

As shown in Fig. 1, the conventional abutment 10 for shielding the shield is composed of a lower body 10a and an upper body 10b.

The lower body (10a) is coupled to the fixture to install the shielding film at a distance from the alveolar bone, the lower male coupling portion (11a) screwed to the fixture, the inverted conical body portion (12a) and upper male supporting the shielding membrane It is composed of a coupling portion (13a). The upper water coupling portion 13a is formed with a tool insertion groove 14a at the center of the upper end.

The upper body (10b) is for fixing the shielding film installed on the lower body (10a), has a body portion (11b), the lower arm in the lower center of the body portion (11b) screwed with the upper male coupling portion (13a) The engaging portion 12b is formed, and a tool insertion groove 13b is formed at the center of the upper end.

An example in which a shielding film is installed using a conventional shielding film abutment having the above configuration is illustrated in FIG. 2.

As shown in FIG. 2, the lower water coupling portion 11a of the lower body 10a is screwed to the fixture that is partially placed in the alveolar bone with a missing bone. The bone to be implanted is filled in the defect site, and the shielding film 1 is placed thereon. At this time, the shielding film 1 is supported by being placed on the body part 11b.

The upper body (10b) is a lower arm coupling portion (12b) formed in the lower center is screwed with the upper male coupling portion (13a) formed in the lower body (10a), the upper body (10b) and the lower body The shielding film 1 is fitted and fixed in the space between (10a).

The conventional abutment for fixing the shielding film having the above-described configuration has a lot of manufacturing time and manufacturing cost because the upper and lower body parts must be formed in order to be screwed, respectively.

In addition, since the work of screwing the upper body to the lower body at the procedure site is done in the oral cavity, the working space is narrow, so the joining work is difficult, especially when the fixture is placed on the side of the alveolar bone. It was difficult.

In addition, the conventional abutment can be applied only when there is a hole in the shielding film, which has the inconvenience of using a dedicated shielding film.

The present invention was devised to solve the problems of the prior art described above, and a problem to be solved by the present invention is to provide a shielding film fixture that can easily and conveniently install a shielding film providing a bone graft space in an alveolar bone area having a bone defect, and It is to provide a fixed assembly.

In order to achieve the above-described problems to be solved of the present invention, the present invention is fixed to the implanted and fixed to the alveolar bone or fixed to the fixture placed on the alveolar bone; A shielding film mounting portion on which the shielding film is mounted; And a tool fastening part to which a tool is fastened, and the shielding film mounting part provides a shielding film fixture characterized in that it has a neck for fastening holes formed in the shielding film and a head to prevent the shielding film from easily falling off.

In the present invention, the neck is formed smaller than the diameter of the fastening hole, characterized in that the middle has a concave shape, the head is characterized in that the other is formed larger than the fastening hole formed in the shielding film, the head Is characterized by having a top surface and a bottom surface in which the edges are inclined downward to help fit and remove the shielding film, and the tool fastening part is in a “╋” shape, a hexagonal shape or a quadrangular shape in which four corners are rounded. Another characteristic is that it is one.

In addition, the present invention is fixed to be fixed by being fixed to be placed on the alveolar bone or fixed to the fixture placed on the alveolar bone; A shielding film mounting portion on which the shielding film is mounted; A tool fastening part to which the tool is fastened; And a hole forming part for forming a hole through the shielding film, and the shielding film mounting part provides a shielding film fixture characterized by having a neck to catch the hole and a head to prevent the shielding film from easily falling off.

In the present invention, the neck is formed smaller than the diameter of the fastening hole, characterized in that the middle has a concave shape, the head is characterized in that the other is formed larger than the fastening hole formed in the shielding film, the head Another feature is to have a top surface and a bottom surface in which the vicinity of the edge is inclined downward to help fit and remove the shielding film.

In addition, the tool fastening part is any one of a "╋" shape, a hexagonal shape or a quadrangular shape with four corners rounded, and the hole forming portion is formed in the head and is broken by a perforating portion that drills a hole in the shield and an external force. It characterized in that it consists of a break, the perforated portion is characterized in that the four blades are formed to stand in a "세워" shape, the perforated portion is another feature that the width is smaller than the diameter of the head.

In addition, the hole forming portion is characterized in that it is composed of a conical perforated portion formed in the head, and the perforated portion has another feature that the width is equal to the diameter of the head.

In addition, the hole forming portion is characterized in that it is composed of a "╋" shaped perforated portion of a concave blade formed in the head, and the perforated portion has another feature that the width is the same as the diameter of the head.

The present invention is a shielding film fixed body described above; And a shielding film cover for pressing the shielding film.

In the present invention, the shielding film cover is characterized in that it is formed wider than the tool fastening part in order to press the shielding film sufficiently wide, and the shielding film cover has a through hole through which the head penetrates, and an inner circumferential surface with the through hole. Another feature is that the elastic projections on the head are formed, the elastic projections are formed at intervals of four, and the elastic projections are downward to the outside in order to help the shielding cover to be inserted or removed from the head. Another feature is that it has a top surface and a bottom surface that are inclined.

According to the shielding film fixed body and the fixed assembly of the present invention, since the fixed body is one body, manufacturing time and manufacturing cost can be greatly reduced.

In addition, since only the work of inserting a shielding film or attaching a cover on the shielding film mounting portion in the fixed body is necessary, the work can be easily performed even in a narrow space.

In addition, since a hole can be formed by the hole forming portion in the fixture, a shielding film without holes can be used without inconvenience.

1 is a schematic exploded view of a conventional abutment for fixing a shielding film;
Figure 2 is an exemplary view showing a shielding film using the conventional abutment for fixing the shielding film of Figure 1;
Figure 3 is a schematic exploded perspective view of the shielding film fixed body and the fixed assembly according to the first preferred embodiment of the present invention;
4 is an enlarged view of the shielding film cover of FIG. 3;
5 is an exemplary view showing a state in which the shield is installed on the shield assembly of FIG. 3;
Figure 6 is a schematic exploded perspective view of the shielding film fixed body and the fixed assembly according to the second preferred embodiment of the present invention;
7 is an exemplary view showing a shielding film installed on the shielding assembly of FIG. 6;
8 exemplarily shows a process in which a hole is formed in a shielding film;
9 is an exemplary view of other modifications of the hole forming portion (perforation portion) forming a hole in the shielding film;
10 is an exemplary view of various modifications of the tool fastening portion;
11 is a schematic exploded perspective view of a shielding film fixed body and a fixed assembly according to a third preferred embodiment of the present invention;
12 exemplarily shows a state in which the shielding film is installed on the shielding assembly of FIG. 11;
13 is a schematic exploded perspective view of a shielding film fixed body and a fixed assembly according to a fourth preferred embodiment of the present invention; And
14 is a view sequentially showing the process of implanting a bone in a deformed alveolar bone by using a shielding fixture (fixed assembly) of the present invention.

Hereinafter, a shielding film fixing body and a fixing assembly according to preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Embodiment 1

The shielding film fixing body and the fixing assembly according to the first embodiment of the present invention will be described with reference to FIGS. 3 and 4. 3 is a schematic exploded perspective view of a shielding film fixing body and a fixing assembly according to a first preferred embodiment of the present invention, and FIG. 4 is an enlarged view of the shielding film cover of FIG. 3.

The shielding film fixing body and the fixing assembly of this embodiment are made of titanium, which is a material having excellent biocompatibility, so that it can be directly placed on the alveolar bone, and is suitable for installing a shielding film having a fastening hole formed directly on the alveolar bone.

As shown in FIG. 3, the shielding film fixing body 100 according to the first embodiment includes a fixing part 110, a shielding film mounting part 120, and a tool fastening part 130, and the shielding film fixing assembly includes a shielding film cover ( 140).

The fixing part 110 is a portion that is placed and fixed to the alveolar bone, and a thread is formed on the outer circumferential surface so that the implantation can be easily performed on the alveolar bone.

The shielding film mounting portion 120 is a portion on which the shielding film is mounted, and is composed of a neck 121 and a head 125.

The neck 121 is a portion where the fastening hole formed in the shielding film is caught, and is formed slightly smaller than the diameter of the fastening hole, and has a slightly concave shape.

In addition, the head 125 is a portion for preventing the shielding film hanging from the neck 121 from easily falling out, and is formed somewhat larger than the fastening hole formed in the shielding film. The head 125 has a substantially disc shape, but the top surface 125a and the bottom surface 125b are formed to be inclined downward near the edge, thereby helping to insert and remove the shielding film.

The tool fastening part 130 is a part to which the tool is fastened, and has a “╋” shape, and the upper surface 131 is formed to be somewhat concave to help the shielding film to be seated.

In the case of the shield 100 made of a metal material such as titanium, the fixing body 100 of this embodiment may be sufficiently hard to be used alone, but in the case of a shield film made of a non-metal material such as collagen, the cover that retracts and presses the shield forcefully It becomes necessary.

4, the shielding film cover 140 is in the form of a disc.

The cover 140 is formed wider than the tool fastening part 130 to sufficiently press the shielding film seated on the tool fastening part 130, and a through hole 141 through which the head 125 is penetrated is formed in the center. In addition, elastic projections 142 are formed at intervals on the inner circumferential surface with the through hole 141.

The elastic protrusions 142 are inclined such that the upper surface 142a and the lower surface 142b are downwardly downward, and when the cover 140 is fitted to the head 125, the end of the elastic projection 142 is the head 125 ), slightly protruding from the edge. The upper and lower cross-sections 125a and 125b of the head 125 are formed to be inclined downward, and the elastic protrusions 142 are also formed to be inclined downward to the upper and lower cross-sections 142a and 142b so that the worker inserts and removes the cover 140 You can do it easily.

5 shows a state in which the shielding film is installed on the shielding assembly of the present embodiment. FIG. 5 is a view showing an example in which a shielding film is installed on the shielding assembly of FIG. 3.

As shown in FIG. 5, the fixed body 100 has the fixed portion 110 directly placed on the alveolar bone 1.

The fastening hole of the shielding film 1 penetrates the head 125 somewhat and hangs on the neck 121, and the shielding film 1 is seated on the concave upper surface 131 of the tool fastening portion 130.

In addition, the cover 140 is fitted to the head 125, and the lower surface of the cover 140 presses the upper surface of the shielding film 1. At this time, the upper surface 142a of the elastic protrusion 142 on the cover 140 is caught on the lower surface 125b of the head 125 to prevent departure.

Example 2

Next, a shielding film fixing body and a fixing assembly according to a second embodiment of the present invention will be described with reference to FIG. 6. 6 is a schematic exploded perspective view of a shield assembly assembly according to a second preferred embodiment of the present invention.

The shielding film fixing body and the fixing assembly of this embodiment are made of titanium, which is a material having excellent biocompatibility so that it can be directly implanted in the alveolar bone, and is suitable for installing a shielding film without a fastening hole.

6, the shielding film fixing body 200 according to the second embodiment includes a fixing part 210, a shielding film mounting part 220, a tool fastening part 230, and a component forming part 250, The shielding film fixing assembly further includes a shielding film cover 240.

The shielding film fixing body 200 according to the present embodiment includes the configuration of the fixing part 210, the shielding film mounting part 220, the tool fastening part 230, and the shielding film cover 240, except for the configuration forming part 250, in the first embodiment described above. Since it is the same as the configuration of the example fixing part 110, the shielding film mounting part 120, the tool fastening part 130, and the shielding film cover 140, a detailed description thereof will be omitted to avoid duplication.

The component forming part 250 is a site for forming a hole through a shielding film, and is formed on a coaxial line on the head 225 of the shielding film mounting part 220, and is composed of a perforating part 251 and a breaking part 255.

The perforated portion 251 is a portion for drilling a hole in the shielding film, and the four blades are vertically formed to have a substantially conical shape. The four blades have a “╋” shape when viewed from above, making a “╋”-shaped hole in the shield. In this way, when drilling a hole in the shape of "╋", it is possible to easily and accurately drill a hole with little force and prevent damage such as tearing of the shielding film.

The breaking portion 255 is a portion that breaks when an external force is applied to the drilling portion 251 for removing the drilling portion 251 after the shielding film is installed.

7 shows a state in which the shielding film is installed on the shielding assembly of the present embodiment. 7 is a view showing an example of the shield is installed on the shield assembly assembly of FIG.

As shown in FIG. 7, in the fixing body 200, the fixing portion 210 is directly placed on the alveolar bone 1.

A hole formed in the shielding film 1 penetrates the head 225 somewhat and hangs on the neck 221, and the shielding film 1 is seated on the concave upper surface 231 of the tool fastening portion 230.

In addition, the cover 240 is fitted to the head 225, and the lower surface of the cover 240 presses the upper surface of the shielding film 1. At this time, the upper surface 242a of the elastic protrusion 242 on the cover 240 is caught on the lower surface 225b of the head 225 to prevent departure.

In this state, the punctured portion 251 is removed by applying a force to the punctured portion 251 to break the ruptured portion 255.

The process of forming a hole in the shielding film will be described in detail with reference to FIG. 8. 8 is a view exemplarily showing a process in which a hole is formed in a shielding film.

As shown in FIG. 8, the lower figures show the fixed body and the shielding film in cross section, and the upper figures show the upper surface.

(1) is a state in which the hole starts to be drilled when the shielding film 1 is placed on the perforated portion 251 of the hole forming portion and then pressed with force. In the figure above, you can see that the hole starts to drill into a "╋" shape.

(2) is a state in which the shielding film 1 has completely penetrated the perforated portion 251 and the hole is sufficiently large. In the above drawing, a hole in the shape of "╋" is drilled sufficiently large and a hole 251 in the shape of "╋" is seen between the holes.

(3) is a state in which the shield 1 is pressed further, and a hole in the shape of “╋” passes through the head 225. In the upper figure, the head 225 is seen along with the perforation 251 as the “╋” shaped hole is further widened.

(4) is a state in which the shielding film 1 is completely fitted and seated on the concave upper surface 231 of the tool fastening portion 230. The seated shielding film 1 is pressed by the cover 240 to be installed firmly. In the above drawing, the cover 240 is covered over the shielding film 1, and through the cover 240, the perforations 251 and the head 225 are visible.

Other examples of the hole forming portion (perforated portion) forming a hole in the shielding film will be specifically described with reference to FIG. 9. 9 is an exemplary view of other modifications of the hole forming portion (perforation portion) forming a hole in the shielding film.

As shown in FIG. 9, the upper figures are cut through a part including a hole forming portion, and the lower figures are upper surfaces.

(1) is a view showing the hole forming portion described above. The height from the extreme end of the perforated portion 251 to the edge of the edge of the head 225 is H1 and the diameter of the perforated portion 251 is D1. The "╋"-shaped perforated portion 251 is shown in the drawing below, wherein the width of the perforated portion 251 is smaller than the diameter of the head 225.

(2) The conical perforated portion 251' is formed on the head 225' without a fracture. Unlike this (1), there is no rupture, so the hole forming part (perforation) is not removed and used in the gum. The height from the distal end of the perforated portion 251' to the edge of the edge of the head 225' is H2 (<H1) and the diameter of the perforated portion 251' is D2 (>D1).

In (3), a ╋" shaped perforated portion 251" having a concave edge is formed on the head 225" without a fractured portion. Unlike this (1), there is no fractured portion and thus a hole forming portion (perforated portion) ) Is not removed but used in the gum. The height from the distal end of the perforation 251" to the edge of the head 225" is H2 (<H1) and the diameter of the perforation 251" is D2( >D1). The "╋"-shaped perforated portion 251 is shown in the lower figure, wherein the width of the perforated portion 251 is equal to the diameter of the head 225.

In the first and second embodiments of the present invention, the tool fastening parts 130 and 230 were in the form of "╋", but can be changed into various forms. Fig. 10 shows the modification. 10 is an exemplary view of various modifications of the tool fastening portion.

As shown in FIG. 10, the tool fastening part in the form of "╋" as in (1), the tool fastening in the hexagonal form as in (2), and the tool fastening in a quadrangular shape with four corners as in (3) Wealth, etc. can be used.

Embodiment 3

Next, a shielding film fixing body and a fixing assembly according to a third embodiment of the present invention will be described with reference to FIG. 11.

The shielding film fixing body and the fixing assembly of this embodiment are made of titanium, which is a material having excellent biocompatibility, and is suitable for installing a shielding film having a fastening hole.

As shown in FIG. 11, the shielding film fixing body 300 according to the third embodiment includes a fixing part 310, a shielding film mounting part 320, and a tool fastening part 330, and the shielding film fixing assembly includes a shielding film cover ( 340).

The fixing part 310 is a part that is fixedly coupled to the fixture placed in the alveolar bone, and is composed of a screw part 311 and a non-thread part 315.

The screw portion 311 is engaged with a screw portion formed in the fixture, and the non-thread portion 315 is seated on a seating surface formed on the screw portion.

Since the shielding film mounting part 320 and the shielding film cover 340 are the same as those of the shielding film mounting part 120 and the shielding film cover 140 of the first embodiment described above, description thereof will be omitted.

The tool fastening portion 330 is integrally formed on the non-threaded portion 315, and is in the form of “╋” like the tool fastening portion 130 of the first embodiment described above. The upper surface 331 of the tool fastening portion 330 is formed to be somewhat concave in order to help the seating of the shielding film.

12 illustrates a state in which the shielding film is installed on the shielding assembly of the present embodiment. FIG. 12 is a view showing an example in which a shielding film is installed on the shielding assembly of FIG. 11.

12, the fixture 300 is coupled to the fixture (f) that is placed in the alveolar bone.

The screw portion 311 is engaged with a screw portion f1 formed in the fixture, and the non-thread portion 315 is seated on a seating surface f2 formed on the screw portion 3.

The fastening hole of the shielding film 1 penetrates the head 325 somewhat and hangs on the neck 321, and the shielding film 1 is seated on the concave upper surface of the tool fastening part 330.

In addition, the cover 340 is fitted to the head 325, and the lower surface of the cover 340 presses the upper surface of the shielding film 1. At this time, the elastic projection 342 on the cover 340 is caught in the edge of the head 325 is being prevented from leaving.

Example 4

Next, a shielding film fixing body and a fixing assembly according to a fourth embodiment of the present invention will be described with reference to FIG. 13.

The shielding film fixing body and the fixing assembly of the present embodiment are made of titanium, which is a material having excellent biocompatibility, and is suitable for installing a shielding film without a fastening hole.

As shown in FIG. 13, the shielding film fixing body 400 according to the fourth embodiment includes a fixing part 410, a shielding film mounting part 420, a tool fastening part 430, and a component forming part 450, The shielding film assembly further includes a shielding film cover 440.

The configuration of the fixing part 410, the shielding film mounting part 420, the tool fastening part 430, and the shielding film cover 440, except for the component forming part 450, includes a fixing part 310 and a shielding film mounting part ( 320), the same as the configuration of the tool fastening part 330 and the shielding film cover 340, a description thereof will be omitted.

In addition, since the configuration forming unit 450 is the same as the configuration of the configuration forming unit 250 of the second embodiment described above, a description thereof will also be omitted.

Since the shielding film is installed on the shielding assembly of the present embodiment, the description of the second and third embodiments described above with reference to FIGS. 7 and 12 is mixed, and thus the description is omitted.

In the third and fourth embodiments of the present invention, the tool fastening parts 330 and 430 were in the form of "╋", but as described in the first and second embodiments, they were changed to various forms such as a hexagonal shape and a quadrangular shape with four corners rounded. Can be.

Finally, with reference to FIG. 14, the process of implanting the bone into the deformed alveolar bone using the shielding fixture (fixed assembly) of the present invention will be briefly described.

In Fig. 14, the fixture described in the second embodiment is typically used. 14 is a view sequentially showing the process of implanting a bone in a deformed alveolar bone by using a shielding fixture (fixed assembly) of the present invention.

As shown in Fig. 14, in order to implant a bone into an alveolar bone having a defect site such as (1), (2) an incision is made by excising the gum, and (3) one or more shielding bodies 200 are provided in the alveolar bone. , (4) filling the bone on the defect, (5) installing the shielding film (1) on the fixture 200 to wrap the filled bone, and (6) covering the fixture 200 (240) ) To fix the shielding film (1), remove the perforated portion (251), (8) cover the shielding film (1) with gums and seal the gums.

As described above, although the shielding film fixing body and the fixing assembly of the present invention have been described with reference to various embodiments of the present invention, it is apparent to those skilled in the art that various changes, modifications, or modifications are possible without departing from the spirit of the present invention.

100,200,300,400: Shielded film fixture
110,210,310,410: Fixed part
120,220,320,420: Shielding film mounting part
130,230,330,430: Tool fastening
140,240,340,440: Shield cover
250,450: Composition forming part

Claims (24)

A fixed part that is placed and fixed to the alveolar bone;
A shielding film mounting portion on which the shielding film is mounted; And
It includes a tool fastening part to which the tool is fastened,
The shielding film mounting portion has a neck for fastening a hole formed in the shielding film and a head for preventing the shielding film from easily falling out,
The head has a shielding film fixture, characterized in that it has an upper surface and a lower surface formed to be inclined downward near the edge to help fit and remove the shielding film. A fixed portion coupled to and fixed to the fixture placed in the alveolar bone;
A shielding film mounting portion on which the shielding film is mounted; And
It includes a tool fastening part to which the tool is fastened,
The shielding film mounting portion has a neck for fastening a hole formed in the shielding film and a head for preventing the shielding film from easily falling out,
The head has a shielding film fixture, characterized in that it has an upper surface and a lower surface formed to be inclined downward near the edge to help fit and remove the shielding film. According to claim 1 or claim 2, wherein the neck is formed smaller than the diameter of the fastening hole, the shielding film fixed body, characterized in that has a concave shape in the middle. According to claim 3, wherein the shielding film fixture, characterized in that the head is formed larger than the fastening hole formed in the shielding film. delete The method of claim 1 or claim 2, wherein the tool fastening portion is a shielding fixture, characterized in that any one of a "╋" shape, a hexagonal shape or a quadrangular shape with four corners rounded. A fixed part that is placed and fixed to the alveolar bone;
A shielding film mounting portion on which the shielding film is mounted;
A tool fastening part to which the tool is fastened; And
It includes a hole forming portion for piercing the shielding film to form a fastening hole,
The shielding film mounting portion has a head for preventing the neck and the shielding film from easily falling out of the hole,
The hole forming portion is formed on the head, the shielding film fixture, characterized in that it comprises a perforated portion for drilling a hole in the shield. A fixed portion coupled to and fixed to the fixture placed in the alveolar bone;
A shielding film mounting portion on which the shielding film is mounted;
A tool fastening part to which the tool is fastened; And
It includes a hole forming portion for piercing the shielding film to form a fastening hole,
The shielding film mounting portion has a head for preventing the neck and the shielding film from easily falling out of the hole,
The hole forming portion is formed on the head, the shielding film fixture, characterized in that it comprises a perforated portion for drilling a hole in the shield. According to claim 7 or 8, wherein the neck is formed smaller than the diameter of the fastening hole, the shielding film fixed body, characterized in that has a concave shape in the middle. 10. The method of claim 9, The head is a shielding film fixture, characterized in that formed larger than the fastening hole formed in the shielding film. 11. The method of claim 10, wherein the head has a shielding film fixture, characterized in that it has a top surface and a bottom surface formed to be inclined downward in the vicinity of the edge to help fit and remove the shield. According to claim 7 or 8, wherein the tool fastening portion is a shielding fixture, characterized in that any one of a "╋" shape, a hexagonal shape or a quadrangular shape with four corners rounded. 9. The shielding film fixing body according to claim 7 or 8, wherein the hole forming portion includes a fracture portion that is broken by an external force. The method of claim 7 or 8, wherein the perforated portion is a shielding fixture, characterized in that the four blades are formed erected in a "╋" shape. 15. The method of claim 14, wherein the perforated portion is a shielding film fixture, characterized in that the width is smaller than the diameter of the head. According to claim 7 or 8, wherein the perforated portion is a shielding film fixture, characterized in that formed in the form of a cone on the head. The method of claim 16, wherein the perforated portion is a shielding film fixture, characterized in that the width is the same as the diameter of the head. 9. The shielding fixture according to claim 7 or 8, wherein the perforated portion is formed with a concave blade having a “╋” shape on the head. The method of claim 18, wherein the perforated portion is a shielding film fixture, characterized in that the width is the same as the diameter of the head. Claim 1, claim 2, claim 7 or claim 8, wherein the shielding film fixed body as claimed in any one of claims; And
A shielding film fixing assembly comprising a shielding film cover for pressing the shielding film. 21. The method of claim 20, The shielding film cover is a shielding film assembly, characterized in that formed to be wider than the tool fastening portion to press the shielding film sufficiently wide. 21. The method of claim 20, wherein the shielding film cover is a shielding film fixed assembly, characterized in that the through-hole through which the head is formed is formed in the center, the elastic projections on the head are formed on the inner circumferential surface with the through-hole. 23. The method of claim 22, wherein the elastic projection is fixed shielding assembly, characterized in that four are formed at intervals. 23. The method of claim 22, wherein the shield is fixed to the shield assembly, characterized in that it has a top surface and a bottom surface inclined downward to the elastic projection to help the shield cover is fitted or removed from the head.

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