Patent Description:
In general, an optical cable is used to process massive data not only via a fiber-to-the-home (FTTH) network but also a mobile communication network, and an optical connector is used at a branch point and an end point of the optical cable so as to effectively manage the optical cable used for the networks.

An optical connector used at an outdoor site is generally installed in a waterproof-sealed protective box such as an optical junction case or an optical terminal box to protect an inside of the optical connector from rainwater, moisture, dust, or the like. The optical connector is usually installed using a sealed protective box such as an optical terminal box, and the protective box includes an adapter or the like which can connect the optical connector and a junction board on which a junction portion and a redundant length of the optical cable can be neatened and stored.

When the optical terminal box is used, the optical terminal box has to be opened and closed whenever an optical cable is connected or disconnected, and an operation for opening and closing an optical fiber junction board inside the optical terminal box has to be performed. Hence, problems can arise in that an optical loss increases and communications disruption can occur when a core of an optical fiber of another line is constructed by being held between a structure or being sharply bent due to a constructor's mistake during operation. In addition, a problem can arise in that an optical line disruption can occur when rainwater infiltrates into the optical terminal box in wet weather due to waterproofing break in a process of opening and closing a cover of the optical terminal box.

<CIT> discloses a configuration including: a fiber optic connector that has a connector housing and a plug ferrule, with at least a part of the plug ferrule being positioned in the connector housing and the plug ferrule being mountable on one end portion of at least one optical fiber; and a plug body that extends in a length direction between both end portions as a first end portion and a second end portion and has a cylindrical shroud in the vicinity of the first end portion, the shroud having a pair of openings at both sides and the openings extending in the length direction from at least a middle to the first end portion of the shroud, in which the fiber optic connector is disposed inside the plug body so as to approach the plug ferrule inside the shroud through the first end portion of the plug body.

However, the document discussed above provides a method that can be applied to an optical cable which is manufactured to have a standardized length in a factory and thus has problems in that the entire optical cable has to be replaced since the occurrence of an abnormal state during onsite construction is not possible to cope with, and an optical connector plug of the optical cable is not possible to manufacture to match a construction length of the optical cable, thus causing a problem of significant waste of the optical cable.

Document <CIT> discloses an optical fiber connector including a housing configured to mate with a receptacle, a collar body that includes a fiber stub and a mechanical splice device, a backbone to retain the collar body within the housing, and a boot. The backbone includes a cable jacket clamping portion to clamp a cable jacket that surrounds a portion of the terminated optical fiber upon actuation. The boot actuates the cable jacket clamping portion of the backbone upon attachment to the backbone. A method for terminating the optical fiber in the field includes slitting or removing a portion of the cable jacket prior to splicing the optical fiber to the fiber stub. The method also includes utilizing a protective sheath or tube to protect exposed portion of the fiber cable and provide structural integrity to the optical connector. Document <CIT> discloses an optical fiber connector accommodating a fusion splicing part in a protection sleeve, which is held within a frame and a rear housing.

An object of the present invention is to provide an optical connector plug for outdoor waterproof onsite assembly in which, since a frame having a slit sheathes and is fixed to an optical cable when the optical cable is constructed on a site, the optical cable and the frame can be easily coupled to each other, the frame is not to be detached even by high tensile strength of the optical cable, the optical connector plug can be constructed to reduce waste of the optical cable by adjusting an installation length thereof when the optical cable is installed on the site, and since the optical connector plug is waterproofed by a protective tube and an O-ring, waterproofing can be simply fulfilled on the outdoor installation site without special complex waterproofing.

According to the present invention to achieve the object, an optical connector plug for outdoor waterproof onsite assembly in accordance with claim <NUM>, and a method in accordance with claim <NUM> is provided.

According to a first aspect of the invention, an optical connector plug for outdoor waterproof onsite includes: an optical connector that is coupled to a tip of an optical cable which is cut on a site, in which the tip at one side of the optical cable is attached to an assembly in a sealing manner, and a frame sheathing an outer side of the optical cable has one side end to which an outer peripheral edge of the assembly is coupled, has one or more slits which are cut from a middle to the other side end and are formed to be widened and narrowed in compliance with an outer diameter of the optical cable, and has a step on an outer peripheral edge at one side end to be held by an inner peripheral edge of a housing so as to withstand tensile strength applied to the outdoor optical cable.

The frame sheathes a sleeve and the optical cable and has one side end which is coupled to the assembly. The sleeve sheathes a sealing part at which the cut tip at the one side of the optical cable is attached to the other end of an optical fiber of the optical cable of the assembly. A fixing unit is coupled to the other end of the frame to fix the frame to an outer peripheral edge of the optical cable. The housing is coupled to an outer side of the frame, and a protective cap is coupled to one end of the housing through a rotating cap. A protective tube is coupled to sheathe the other end of the housing and the optical cable. A boot is coupled to an outer side of the protective tube and inhibits the optical cable from being excessively bent.

The sleeve is configured of a shrinkable tube or an adhesive reinforcing member, and the protective tube is configured of a shrinkable tube.

The housing has an O-ring groove on an outer peripheral edge at one side to which an O-ring is coupled, and the one side having the O-ring groove is coupled to an adaptor formed in an optical terminal box such that waterproofing is fulfilled with the O-ring in the O-ring groove.

One side end of the assembly is formed to more protrude than one side end of the housing so as to be easily connected to the adaptor formed in the optical terminal box when being coupled to the adaptor.

One end of a connection body connected to the housing is coupled to an outer peripheral edge of the protective cap, and the other side of the connection body is formed in a clip shape to be inserted into and coupled to an outer peripheral edge of the housing. An inner peripheral edge at the other side of the protective cap has threads which are coupled to and fixed to the rotation cap through rotation of threads formed on an outer peripheral edge of the rotation cap.

The fixing unit is configured of one of a clamp ring, a rotating ring, or a fastening ring.

According to a second aspect of the invention, a method for manufacturing an optical connector plug for outdoor waterproof onsite assembly according to the first aspect includes: a step of cutting an optical cable based on a construction length thereof; a step of connecting a tip at one side of the cut optical cable to the other side end of an optical cable which is coupled to the assembly and sheathing an attachment part by inserting the sleeve into a connection part; a step of sheathing the outer side of the connected optical cable with the frame and inserting and fixing the assembly into an edge at one side of the frame; a step of coupling the fixing unit to an edge at the other side of the frame to fix the frame through compression; a step of coupling the protective cap which is protecting the assembly to one end of the frame by coupling and fixing the housing to an outer peripheral edge of the frame and coupling the protective cap to the rotation cap; a step of coupling the protective tube such that the other side of the housing is partially sheathed to fulfill waterproofing and the outer peripheral edge of the optical cable is sheathed; and a step of protecting the optical cable from excessive bending by coupling the boot to the outer side of the protective tube.

The frame has one side end to which the outer peripheral edge of the assembly is coupled, has the one or more slits which are cut from the middle to the other side end and are formed to be widened and narrowed in compliance with the outer diameter of the optical cable, and has a step on an outer peripheral edge at one side end to be held by the inner peripheral edge of the housing so as to withstand tensile strength applied to the outdoor optical cable.

The present invention has an effect in that, since a frame having a slit sheathes and is fixed to an optical cable when the optical cable is constructed on a site, the optical cable and the frame can be easily coupled to each other, and the frame is not to be detached even by high tensile strength of the optical cable.

In addition, the present invention has another effect in that the optical connector plug can be constructed to reduce waste of the optical cable by adjusting an installation length thereof when the optical cable is installed on the site.

In addition, the present invention has still another effect in that, since the optical connector plug is waterproofed by a protective tube and an O-ring, waterproofing can be simply fulfilled on the outdoor installation site without special complex waterproofing.

According to the present invention, there is provided an optical connector which is coupled to a tip of an optical cable cut on a site, the tip at one side of the optical cable <NUM> is attached to an assembly <NUM> in a sealing or mechanical manner, and a frame <NUM> sheathing an outer side of the optical cable <NUM> has one side end to which an outer peripheral edge of the assembly <NUM> is coupled, has one or more slits <NUM> which are cut from a middle to the other side end and are formed to be widened and narrowed in compliance with an outer diameter of the optical cable <NUM>, and has a step <NUM> on an outer peripheral edge at one side end to be held by an inner peripheral edge of a housing <NUM> so as to withstand the tensile strength applied to the outdoor optical cable <NUM>.

In addition, there is provided a method for manufacturing an optical connector for outdoor waterproof onsite assembly, including: Step S10 of cutting the optical cable <NUM> based on a construction length thereof; Step S20 of connecting a tip at one side of the cut optical cable <NUM> to the other side end of an optical cable which is coupled to the assembly <NUM> and sheathing an attachment part by inserting the sleeve <NUM> into a connection part; Step S30 of sheathing the outer side of the connected optical cable <NUM> with the frame <NUM> and inserting and fixing the assembly <NUM> into an edge at one side of the frame <NUM>; Step S40 of coupling the fixing unit <NUM> to an edge at the other side of the frame <NUM> to fix the frame <NUM> through compression; Step S50 of coupling the protective cap <NUM> protecting the assembly <NUM> to one end of the frame <NUM> by coupling and fixing the housing <NUM> to an outer peripheral edge of the frame <NUM> and coupling the protective cap <NUM> to the rotation cap <NUM>; Step S60 of coupling the protective tube <NUM> such that the other side of the housing <NUM> is partially sheathed to fulfill waterproofing and the outer peripheral edge of the optical cable <NUM> is sheathed; and Step S70 of protecting the optical cable from excessive bending by coupling the boot <NUM> to the outer side of the protective tube <NUM>.

Hereinafter, specific embodiments of the present invention will be described with reference to the accompanying drawings. The embodiments of the present invention are provided to describe one invention, and the scope of the invention as defined in the appended claims is not limited to the illustrated embodiments. The present invention is not to be construed to be limited to the drawings, since the illustrated drawings provide enlarged views of only essential contents for clarity of the invention, and incidental contents are omitted.

According to the present invention, in an optical connector which is coupled to a tip of an optical cable cut on a site, the tip at one side of the optical cable <NUM> is attached to an assembly <NUM> in a sealing manner, and a frame <NUM> sheathing an outer side of the optical cable <NUM> has one side end to which an outer peripheral edge of the assembly <NUM> is coupled, has one or more slits <NUM> which are cut from a middle to the other side end and are formed to be widened and narrowed in compliance with an outer diameter of the optical cable <NUM>, and has a step <NUM> on an outer peripheral edge at one side end to be held by an inner peripheral edge of a housing <NUM> so as to withstand the tensile strength applied to the outdoor optical cable <NUM>.

The frame <NUM> sheathes a sleeve <NUM> and the optical cable <NUM> and has one side end which is coupled to the assembly <NUM>. The sleeve <NUM> sheathes a sealing part at which a cut tip at one side of the optical cable <NUM> is attached to the other end of an optical fiber of the optical cable of the assembly <NUM>. A fixing unit <NUM> is coupled to the other end of the frame <NUM> to fix the frame <NUM> to an outer peripheral edge of the optical cable <NUM>. The housing <NUM> is coupled to an outer side of the frame <NUM>, and a protective cap <NUM> is coupled to one end of the housing <NUM> through a rotation cap <NUM>. A protective tube <NUM> is coupled to sheathe the other end of the housing <NUM> and the optical cable <NUM>. A boot <NUM> is coupled to an outer side of the protective tube <NUM> and inhibits the optical cable <NUM> from being excessively bent.

The sleeve <NUM> is configured of a shrinkable tube or an adhesive reinforcing member, and the protective tube <NUM> is configured of a shrinkable tube.

The housing <NUM> has an O-ring groove <NUM> on an outer peripheral edge at one side to which an O-ring <NUM> is coupled, and the one side having the O-ring groove <NUM> is coupled to an adaptor formed in an optical terminal box such that waterproofing is fulfilled with the O-ring <NUM> in the O-ring groove <NUM>.

One side end of the assembly <NUM> is formed to more protrude than one side end of the housing <NUM> so as to be easily connected to the adaptor formed in the optical terminal box when being coupled to the adaptor.

One end of a connection body <NUM> connected to the housing <NUM> is coupled to an outer peripheral edge of the protective cap <NUM>, and the other side of the connection body <NUM> is formed in a clip shape to be inserted into and coupled to an outer peripheral edge of the housing <NUM>. An inner peripheral edge at the other side of the protective cap has threads which are coupled to and fixed to the rotation cap <NUM> through rotation of threads formed on an outer peripheral edge of the rotation cap <NUM>.

The fixing unit <NUM> is configured of one of a clamp ring, a rotating ring, or a fastening ring.

An onsite assembly process of an optical connector plug for outdoor waterproof onsite assembly includes: Step S10 of cutting the optical cable <NUM> based on a construction length thereof; Step S20 of connecting a tip at one side of the cut optical cable <NUM> to the other side end of an optical cable which is coupled to the assembly <NUM> and sheathing an attachment part by inserting the sleeve <NUM> into a connection part; Step S30 of sheathing the outer side of the connected optical cable <NUM> with the frame <NUM> and inserting and fixing the assembly <NUM> into an edge at one side of the frame <NUM>; Step S40 of coupling the fixing unit <NUM> to an edge at the other side of the frame <NUM> to fix the frame <NUM> through compression; Step S50 of coupling the protective cap <NUM> protecting the assembly <NUM> to one end of the frame <NUM> by coupling and fixing the housing <NUM> to an outer peripheral edge of the frame <NUM> and coupling the protective cap <NUM> to the rotation cap <NUM>; Step S60 of coupling the protective tube <NUM> such that the other side of the housing <NUM> is partially sheathed to fulfill waterproofing and the outer peripheral edge of the optical cable <NUM> is sheathed; and Step S70 of protecting the optical cable from excessive bending by coupling the boot <NUM> to the outer side of the protective tube <NUM>.

The frame <NUM> has the one side end to which the outer peripheral edge of the assembly <NUM> is coupled, has the one or more slits <NUM> which are cut from the middle to the other side end and are formed to be widened and narrowed in compliance with the outer diameter of the optical cable <NUM>, and has a step <NUM> on an outer peripheral edge at one side end to be held by the inner peripheral edge of the housing <NUM> so as to withstand the tensile strength applied to the outdoor optical cable <NUM>.

<FIG> is perspective view illustrating an overall configuration of the optical connector plug for outdoor waterproof onsite assembly according to an embodiment of the present invention. In the optical connector that is coupled to a tip of an optical cable cut on a site, the tip of the optical cable <NUM> is connected to the other end of the optical cable, which is coupled to the assembly <NUM>, in a sealing or mechanical manner is connected, and the frame <NUM> sheathing the outer side of the optical cable <NUM> has the one side end to which the outer peripheral edge of the assembly <NUM> is coupled, has the one or more slits <NUM> which are cut from the middle to the other side end and are formed to be widened and narrowed in compliance with the outer diameter of the optical cable <NUM>, and has the step <NUM> on the outer peripheral edge at the one side end to be held by the inner peripheral edge of the housing <NUM> so as to withstand the tensile strength applied to the outdoor optical cable <NUM>.

<FIG> is a view illustrating an overall configuration of the frame of the optical connector plug for outdoor waterproof onsite assembly according to the present invention. <FIG> is a view illustrating a state where the frame of the optical connector plug for outdoor waterproof onsite assembly is fixed to the outer peripheral edge of the optical cable through a crimping ring, according to the present invention. <FIG> is a view illustrating a state where the frame of the optical connector plug for outdoor waterproof onsite assembly is fixed to the outer peripheral edge of the optical cable through a rotating ring, according to the present invention. <FIG> is a view illustrating a state where the frame of the optical connector plug for outdoor waterproof onsite assembly is fixed to the outer peripheral edge of the optical cable through a fastening ring, according to the present invention. <FIG> is an exploded view of the optical connector plug for outdoor waterproof onsite assembly according to the present invention. <FIG> is a view illustrating a process of a method for manufacturing an optical connector plug which is formed through a method for manufacturing an optical connector plug for outdoor waterproof onsite assembly according to the present invention. <FIG> is a view illustrating next steps after the method for manufacturing an optical connector plug in <FIG>. <FIG> is a view illustrating a sectional view of the optical connector plug for outdoor waterproof onsite assembly according to the present invention. <FIG> is a flowchart of a full procedure of a method for manufacturing an optical connector plug for outdoor waterproof onsite assembly according to an embodiment of the present invention.

With reference to <FIG> and <FIG>, the frame <NUM> sheathes the sleeve <NUM> and the optical cable <NUM> and has the one side end which is coupled to the assembly <NUM>. The sleeve <NUM> sheathes the sealing part at which the cut tip at the one side of the optical cable <NUM> is attached to the other end of the optical fiber of the optical cable of the assembly <NUM>. The fixing unit <NUM> is coupled to the other end of the frame <NUM> to fix the frame <NUM> to the outer peripheral edge of the optical cable <NUM>. The housing <NUM> is coupled to the outer side of the frame <NUM>, and the protective cap <NUM> is coupled to the one end of the housing <NUM> through the rotation cap <NUM>. The protective tube <NUM> is coupled to sheathe the other end of the housing <NUM> and the optical cable <NUM>. The boot <NUM> is coupled to the outer side of the protective tube <NUM> and inhibits the optical cable <NUM> from being excessively bent.

After the optical cable <NUM> is cut based on the construction length thereof on a site where the optical cable <NUM> is constructed, the other end of the assembly <NUM> and one end of the optical cable <NUM> are connected to each other by a sealing device according to the claimed invention, or by a mechanical connection device in embodiments not part of the claimed invention.

The connection part protects an attachment portion with the sleeve <NUM> when the assembly <NUM> and the optical cable <NUM> are sealed according to the claimed invention, and the frame can be coupled without using the sleeve <NUM> when the assembly <NUM> and the optical cable <NUM> are mechanically coupled to each other, in embodiments not part of the claimed invention.

The assembly <NUM> is configured of either an uncoupled form or an assembled module form, and thus an operator can select a form which is easy to use on a construction site.

The sleeve <NUM> is configured of the shrinkable tube or the adhesive reinforcing member, thus, protecting the attachment part by sheathing the attachment part of the optical cable <NUM> and the assembly <NUM> which are connected through sealing.

As illustrated in <FIG>, the frame <NUM> has the one side end to which the outer peripheral edge of the assembly <NUM> is coupled, has the one or more slits <NUM> which are cut from the middle to the other side end and are formed to be widened in compliance with the outer diameter of the optical cable <NUM>, and has the step <NUM> on the outer peripheral edge at one side end to be held by the inner peripheral edge of the housing <NUM> so as to withstand the tensile strength applied to the optical cable <NUM> when the housing <NUM> is coupled to the adaptor in the optical terminal box through the rotation cap <NUM>.

As illustrated in <FIG>, the fixing unit <NUM> can be configured of one of a clamp ring, a rotating ring, or a fastening ring.

A coupling member is formed at the other side of the frame <NUM> to correspond to a shape of the fixing unit <NUM>, and the coupling member has a rotation thread or a holding step at an outer side thereof to be coupled to the rotating ring or the fastening ring. Hence, the frame <NUM> is pressurized, and the optical cable <NUM> and the frame <NUM> are fixed.

In this case, the coupling member, to which the fixing unit <NUM> is coupled, is formed in a tapering shape to be coupled to the fixing unit <NUM> while gradually tightening the optical cable <NUM> when the fixing unit <NUM> is coupled to the coupling member.

When the fixing unit <NUM> is configured of the clamp ring, the coupling member is pressurized to be coupled by a compression unit.

The protective cap <NUM> protecting the assembly <NUM> is coupled to one end of the housing <NUM>, and the housing <NUM> is coupled and fixed to the outer peripheral edge of the frame <NUM> by coupling the protective cap <NUM> to the rotation cap <NUM>.

In this case, the housing <NUM> has the O-ring groove <NUM> on the outer peripheral edge at the one side to which the O-ring <NUM> is coupled, and the one side having the O-ring groove <NUM> is coupled to the adaptor formed in the optical terminal box such that waterproofing is to be fulfilled with the O-ring <NUM> in the O-ring groove <NUM>.

When the housing <NUM> is coupled thereto, the one side end of the assembly <NUM> is formed to more protrude than the one side end of the housing <NUM> so as to be easily connected to the adaptor formed in the optical terminal box when being coupled to the adaptor.

The one end of the connection body <NUM> connected to the housing <NUM> is coupled to the outer peripheral edge of the protective cap <NUM>, and the other side of the connection body <NUM> is formed in a clip shape to be inserted into and coupled to the outer peripheral edge of the housing <NUM>. The inner peripheral edge at the other side of the protective cap has threads which are coupled to and fixed to the rotation cap <NUM> through rotation of threads formed on the outer peripheral edge of the rotation cap <NUM>.

The protective tube <NUM> is coupled such that the other side of the housing <NUM> is partially sheathed to fulfill waterproofing and the outer peripheral edge of the optical cable <NUM> is sheathed.

In this case, the protective tube <NUM> is configured of a shrinkable tube to sheathe the outer peripheral edge at the other side of the housing <NUM> and the outer peripheral edge of the optical cable <NUM> through heat shrink such that the waterproofing is fulfilled.

The boot <NUM> is coupled on the protective tube <NUM> at an outer side of the housing <NUM> and inhibits the optical cable at an end of the optical connector plug from being excessively bent.

With reference to <FIG>, the method for manufacturing the optical connector of the present invention includes: Step S10 of cutting the optical cable <NUM> based on a construction length thereof on a site where the optical cable <NUM> is constructed; Step S20 of connecting the tip at one side of the cut optical cable <NUM> to the other side end of an optical cable which is coupled to the assembly <NUM> and sheathing the connection part by inserting the sleeve <NUM> into a part at which connection is performed; Step S30 of sheathing the outer side of the connected optical cable <NUM> with the frame <NUM> and inserting and fixing the assembly <NUM> into the edge at the one side of the frame <NUM>; Step S40 of coupling the fixing unit <NUM> to the edge at the other side of the frame <NUM> to fix the frame <NUM> through compression; Step S50 of coupling the protective cap <NUM> protecting the assembly <NUM> to the one end of the frame <NUM> by coupling and fixing the housing <NUM> to the outer peripheral edge of the frame <NUM> and coupling the protective cap <NUM> to the rotation cap <NUM>; Step S60 of coupling the protective tube <NUM> such that the other side of the housing <NUM> is partially sheathed to fulfill waterproofing and the outer peripheral edge of the optical cable <NUM> is sheathed; and a step S70 of protecting the edge at the other side of the frame <NUM> by coupling the boot <NUM> to the frame <NUM>.

In Step S10 of cutting the optical cable based on the construction length thereof, the optical cable <NUM> is cut based on the construction length on the site where the optical cable <NUM> is constructed.

In Step S20 of sheathing the connection part, the optical cable <NUM> is cut based on the construction length thereof on the site where the optical cable <NUM> is constructed, and then the tip at one side of the cut optical cable is connected to the other end of the optical cable, which is coupled to the assembly <NUM>, by a sealing device, and the connection part is to be sheathed by inserting the sleeve <NUM> into the connection part. In embodiments not part of the claimed invention, the assembly <NUM> and the optical cable <NUM> can be mechanically coupled to each other without sealing of the connection part, and the frame is to be directly coupled to the outer peripheral edge of the mechanically coupled optical cable <NUM>.

The sleeve <NUM> is configured of the shrinkable tube or the adhesive reinforcing member, thus, protecting the attachment part by sheathing the attachment part of the optical cable <NUM> and the assembly <NUM> which are connected to each other.

When the sleeve <NUM> sheathes the attachment part through Step S20 of sheathing the attachment part, the frame <NUM> is coupled to the outer side of the attached optical cable <NUM> through Step S30 of inserting and fixing the assembly <NUM>, and the assembly <NUM> is inserted and fixed into the edge at one side of the frame <NUM>.

In this case, the frame <NUM> has the one side end to which the outer peripheral edge of the assembly <NUM> is coupled, has the one or more slits <NUM> which are cut from the middle to the other side end and are formed to be widened in compliance with the outer diameter of the optical cable <NUM>, and has the step <NUM> on the outer peripheral edge at the one side end to be held by the inner peripheral edge of the housing <NUM> so as to withstand the tensile strength applied to the optical cable <NUM> when the housing <NUM> is coupled to the adaptor in the optical terminal box through the rotation cap <NUM>.

When the frame <NUM> is coupled to the outer side of the optical cable <NUM> through Step S30 of inserting and fixing the assembly <NUM>, the fixing unit <NUM> is coupled to the edge at the other side of the frame <NUM> through Step S40 of fixing the frame <NUM>, and the frame <NUM> is fixed by the fixing unit <NUM> with compression from a compression device.

In this case, the fixing unit <NUM> can be configured of one of a clamp ring, a rotating ring, or a fastening ring.

The coupling member is formed at the other side of the frame to correspond to the shape of the fixing unit, and the coupling member has the rotation thread or the holding step at the outer side thereof to be coupled to the rotating ring or the fastening ring. Hence, the frame <NUM> is pressurized, and the optical cable <NUM> and the frame <NUM> are fixed.

When the frame <NUM> is fixed by the fixing unit <NUM> through Step S40 of fixing the frame <NUM>, the protective cap <NUM> protecting the assembly <NUM> is coupled to the one end of the housing <NUM> through Step S50 of coupling and fixing the housing <NUM>, and the housing <NUM> is coupled and fixed to the outer peripheral edge of the frame <NUM> by coupling the protective cap <NUM> and the rotation cap <NUM> to each other.

The one end of the connection body <NUM> connected to the housing <NUM> is coupled to the outer peripheral edge of the protective cap <NUM>, and the other side of the connection body <NUM> is formed in the clip shape to be inserted into and coupled to the outer peripheral edge of the housing <NUM>. The inner peripheral edge at the other side of the protective cap has threads which are coupled to and fixed to the rotation cap <NUM> through rotation of threads formed on the outer peripheral edge of the rotation cap <NUM>.

When the housing <NUM> is fixed to the outer side of the frame <NUM> through Step S50 of coupling and fixing the housing <NUM>, the protective tube <NUM> is coupled such that the other side of the housing <NUM> is partially sheathed to fulfill waterproofing and the outer peripheral edge of the optical cable <NUM> is sheathed through Step S60 of coupling the protective tube <NUM>.

In this case, the protective tube <NUM> is configured of the shrinkable tube to sheathe the outer peripheral edge at the other side of the housing <NUM> and the outer peripheral edge of the optical cable <NUM> through heat shrink such that the waterproofing is fulfilled.

When the protective tube <NUM> is coupled through Step S60 of coupling the protective tube <NUM>, the boot <NUM> is coupled to the other side of the frame <NUM> through Step S70 of protecting the edge of the frame <NUM> such that the optical cable is protected from excessive bending of the optical cable.

When the optical cable <NUM> is cut by a set length thereof on the site through the process, and then the optical connector plug is formed at the tip of the optical cable <NUM>, the protective cap <NUM> is removed, the optical connector plug is coupled to the adaptor in the optical terminal box, and then the adaptor is coupled and fixed to the optical connector plug through the rotation cap <NUM>.

The present invention realized as described above has an effect in that, since the integral frame having the slit sheathes and is fixed to the optical cable when the optical cable is constructed on the site, the optical cable and the frame can be easily coupled to each other, and the frame is not to be detached even by high tensile strength of the optical cable.

In addition, the present invention has another effect in that the optical connector plug can be constructed to reduce waste of the optical cable by adjusting the installation length thereof when the optical cable is installed on the site.

In addition, the present invention has still another effect in that, since the optical connector plug is waterproofed by the protective tube and the O-ring, waterproofing can be simply fulfilled on the outdoor installation site without special complex waterproofing.

Claim 1:
An optical connector plug for outdoor waterproof onsite assembly, comprising:
an optical connector that is coupled to a tip of an optical cable (<NUM>) cut on a site,
wherein the tip at one side of the optical cable (<NUM>) is attached to an optical fiber of an optical cable of an assembly (<NUM>) in a sealing manner, and a frame (<NUM>) sheathing an outer side of the optical cable (<NUM>) has one side end to which an outer peripheral edge of the assembly (<NUM>) is coupled, has one or more slits (<NUM>) which are cut from a middle to the other side end and are formed to be widened and narrowed in compliance with an outer diameter of the optical cable (<NUM>), and has a step (<NUM>) on an outer peripheral edge at one side end to be held by an inner peripheral edge of a housing (<NUM>) so as to withstand tensile strength applied to the outdoor optical cable (<NUM>),
wherein the frame (<NUM>) sheathes a sleeve (<NUM>) and the optical cable (<NUM>) and has one side end which is coupled to the assembly (<NUM>),
wherein the sleeve (<NUM>) sheathes a sealing part at which a cut tip at one side of the optical cable (<NUM>) is attached to the other end of the optical fiber of the optical cable of the assembly (<NUM>),
wherein a fixing unit (<NUM>) is coupled to the other end of the frame (<NUM>) to fix the frame (<NUM>) to an outer peripheral edge of the optical cable (<NUM>),
wherein the housing (<NUM>) is coupled to an outer side of the frame (<NUM>), and a protective cap (<NUM>) is coupled to one end of the housing (<NUM>) through a rotation cap (<NUM>),
wherein a protective tube (<NUM>) is coupled to sheath the other end of the housing (<NUM>) and the optical cable (<NUM>), and
wherein a boot (<NUM>) is coupled to an outer side of the protective tube (<NUM>) and inhibits the optical cable (<NUM>) from being excessively bent,
wherein the housing (<NUM>) has an O-ring groove (<NUM>) on an outer peripheral edge at one side to which an O-ring (<NUM>) is coupled, and the one side having the O-ring groove (<NUM>) is coupled to an adaptor formed in an optical terminal box such that waterproofing is fulfilled with the O-ring (<NUM>) in the O-ring groove (<NUM>).