KR0147759B1 - Optical fiber splicing device - Google Patents

Abstract

The present invention relates to a multi-core optical fiber collective connection device for maintaining the characteristics and convenient workability in the connection between the optical fibers, a structure for clamping the optical fiber by the dimensional interference between the connector parts without special tools, The optical fiber connection clamp is constructed with a seesaw structure to facilitate the insertion of optical fibers, and the circular clamps formed at one end of the coating clamps can be easily mounted on and inserted into each V-groove. It has a function to rotate and re-use after disassembly and cleaning while providing double clamping function to clamp not only the connection part but also the multi-core fiber coating part, respectively, to prevent breakage of the fiber in tension, torsion or left and right shake. There are possible advantages.

Description

Fiber optic splice

1 is a perspective view of an optical fiber splicing apparatus according to the present invention.

2a is an exploded perspective view of FIG.

FIG. 2B is a cross sectional view along line A-A of the connector body shown in FIG. 2A;

FIG. 2C is a cross sectional view along line B-B of the lid shown in FIG. 2A;

3 is a perspective view showing an open state and a closed state of the lid of FIG.

4 shows the rotation of the coating clamp of FIG.

5 is an explanatory view of the seesaw structure of the optical fiber connection clamp.

* Explanation of symbols for main parts of the drawings

1: Connector body 2: Connection clamp

3: coated clamp 4: cover

5: V-groove board 6: Rail groove

7: Connection check part 8: Clamping surface

9: accommodating part 10: coating clamp protrusion

11: coating clamp protrusion receiving groove 12: coating clamp clamping surface

13 cover clamping surface 14 cover center flat part

15: cover wing portion 16: coated clamp stopper

17: rail latch 18: inclined cut portion

19: coating clamp rotating edge

20: connection clamp protrusion receiving groove 21: connection clamp protrusion

22: Connector body side wall 23: V groove substrate insertion groove

24: projection clamp lower protrusion surface 25: V groove

26: connector body lower substrate 27: coating clamp body

The present invention relates to an optical fiber splicing device that clamps an optical fiber firmly by dimensional interference between components in summating mechanical splicing between two ribbon optical fibers (multi-core optical fibers) in one splicing device. In particular, the connector body having a cover for clamping or releasing the optical fiber and a rail groove for guiding the left and right movement of the rail clasp in the cover, and the shaft preventing device securely fix the fiber coating part. Coating clamp and a seesaw structure that facilitates the insertion of the optical fiber, which has a function to rotate the upper part so that the V-groove is opened so that the optical fiber is not hindered in order to accurately place the V-groove in the interconnection between the optical fibers of the optical fiber. Multi-core optics, which can clamp the coating and cladding sections of an optical fiber, including optical fiber splice clamps It is for the oil access.

Devices for splicing optical fibers have already been commercialized and known, but there is still a need for faster and more reliable methods. Most known mechanical splices are those for connecting one optical fiber to one splice. These methods consume a lot of connection time and cost of connection devices by connecting single-fiber optical fibers together. If the connection body is large, the inside of the optical cable connection enclosure becomes complicated and its size increases.

In order to improve these problems, several devices have been proposed to connect multicore optical fibers at once. One method is the multi-core fusion splicing method, which has the advantage of having high optical characteristics. However, since the optical fiber is melted and connected, it becomes a permanent connection type and requires electricity to be applied. There is a risk of explosion due to uncomfortable use or underground gas when used as underground pipes.

In particular, the big constraint of multi-core fusion splicer is that it is very expensive equipment.

Another method of connecting multi-core optical fibers is a mechanical connection method. This method can be divided into a method of using an adhesive and a method of not using an adhesive. As an example of a method using an adhesive, U.S. Pat. NO. The 3864018 is a structure in which a plurality of optical fibers are arranged by using a thin and rigid chip having a constant gap and a uniformly shaped parallel groove, and a plurality of optical fibers are stacked. At this time, the grooved chip is used to maintain the alignment of the optical fiber and the adhesive is used to fix the optical fiber.

Another example of using an adhesive is U.S. Pat. NO. The same applies to 4029390. The method of using the adhesive has a disadvantage that it takes a long time for the adhesive to harden, as well as a long connection time, and the need to polish the end surface of the optical fiber to be connected to increase the step of the operation. The adhesive may also cause contamination on the end face of the optical fiber, and may cause gaps or transverse offsets due to thermal expansion coefficient differences with the material of the substrate used to align the optical fiber, causing a lot of splice loss. There is a problem.

In addition, in the method of using the adhesive, the adhesive is used only for fixing the optical fiber and the substrate, and the mechanical method is used to maintain the alignment of the connected optical fibers. Pat. NO. 5134673.

The method is to clip and peel off a positive chip in which optical fibers are fixed to a pair of silicon substrates so that connection alignment is maintained by using a clip between two negative chips. The device can be reconnected.

However, the use of a connection tool is essential to securely insert the clip with a constant force while maintaining a precise connection.

Examples of connecting devices that do not use adhesives are U.S. Pat. NO. There is a similar method as in 5134673, or a method of connecting and aligning optical fibers in a mechanical manner without fixing the adhesive to the substrate. This method does not require the use of adhesives or polish the connection part, and it is also possible to reconnect by peeling off the clip because it is structured to mount the multi-core optical fiber and connect it with a cover and fix it with a clip.

However, when the base plate and the cover of the base plate are separated from each other, when the multi-core optical fibers are pushed and aligned on one side, it is impossible to cover the upper part of the connected optical fibers with the cover in a stable fixation and accurate alignment of the base plate without the help of a work tool. Way. In addition, the use of a tool for the clip is also essential in order to securely insert and remove the clip with a constant force while maintaining a precise connection. In addition, since the connection part is exposed to the outside during alignment, the connection part may be contaminated by dust or the like in a bad environment, which may affect the connection loss.

Another example is U.S. Pat. NO. The structure of the splice device presented in 5155781 has a splice element made of two aluminum substrates to connect and maintain the alignment of the optical fibers in the body. It is a method of fixing the two substrates by firmly bonding by embedding in the air. Therefore, the above connection device requires a tool for driving the drainage to add the clamping force, and reconnection or disassembly of an expensive connection device than a single connection device is necessary because the splice element is deformed and reconnection is impossible with one use. Impossible to clean and reuse is very wasteful in terms of cost. In order for the multi-core optical fibers (ribbons) to be well placed on the board, the part of the V-groove board is extended out of the body and the cover of both ends of the connecting device to protect the optical fibers with the left or right axis. To rotate the cover to open and close the cover on one side of the cover to form a rotating shaft of the rod-shaped jaw to the rotation, and the other side to form a fastener to engage with the body because of the connection device The size, in particular the width, becomes less mountable when mounted in an optical cable junction box.

In order to solve the problems of the apparatuses for connecting the conventional multi-core optical fibers as described above, the present invention has a seesaw structure of the optical fiber connection clamp when performing the clamping function, it is possible to connect without the use of a special connection tool, When aligning the optical fiber, the cover on the left and right of the connection part is operated separately to facilitate the tuning work, and the coating clamp is provided with a projection to prevent movement in the axial direction of the fiber, and the body is perpendicular to the optical axis along the receiving groove in the body. Coating to see the V-groove substrate hidden under the coating clamp housed in the body in order to eliminate the connection failure caused by the axial rolling and to easily insert the multi-core optical fiber into each V-groove by moving only in the direction. It is a function to rotate the coating clamp around the shaft formed at one end of the clamp. In addition, by providing double clamping function to clamp not only splices but also multi-core fiber (ribbon) coatings, the fiber optic splice can be reused after reconnecting and disassembling and cleaning while preventing judgment of optical fibers in tension, torsion or left and right shake. The purpose is to provide.

A feature of the present invention for achieving the above object is in the optical fiber connecting device for mechanically connecting the single or multi-core optical fiber mutually, there is provided a connection space for accommodating the connecting devices for the connection of the optical fiber therein, the space An accommodation groove for receiving a projection for preventing an axial movement of the connection device accommodated in the interior of the connector body, the connector body having rail-shaped grooves formed along the entire longitudinal direction of the outer lower end portion; A substrate formed in a connection space formed in the connector body and having a groove in which one or a plurality of optical fibers can be placed; An optical fiber connection clamp positioned at an upper portion of a central portion of the substrate on which the optical fiber is placed to compress the cladding portion of the optical fiber; Located on both left and right sides of the optical fiber connection clamp, the groove is formed over the substrate on which the optical fiber is placed and the upper part of the connector body, and rotates within a predetermined angle with respect to the projection received in the projection receiving groove formed in the connector body. An optical fiber coating clamp for facilitating insertion of the optical fiber by pressing the optical fiber coating; Coupled with the rail-shaped groove formed in the lower part of the connector body and as the left and right movement from the center of the connector body, respectively, by pressing the clamp in the lower vertical direction through the dimensional interference with the upper surface of each clamp to fix the optical fiber It consists of a cover.

Hereinafter, a detailed description of an embodiment of an optical fiber splicing apparatus according to the present invention with reference to the accompanying drawings.

1 is a perspective view of an optical fiber splicing apparatus according to the present invention, and FIG. 2a is an exploded perspective view of FIG.

FIG. 2B is a cross-sectional view taken along line A-A of FIG. 1.

As shown in FIG. 1 and FIG. 2A, the optical fiber splicing apparatus according to the present invention includes a V-groove substrate 5 in which optical fibers are aligned, a coating clamp 3 for clamping a coating portion of the optical fiber, and an optical fiber cladding portion. It is shown that it consists of a clamping optical fiber connection clamp 2, a cover 4 causing dimensional interference with these clamps, and a connector body 1 receiving it.

The V-groove substrate 5 on which the optical fiber is placed for the connection of the optical fiber is a flat plate member of a rectangular parallelepiped having a groove on which the optical fiber can be placed, for example, one or a plurality of V-shaped grooves. It is a board formed with a dog. The V-groove substrate 5 is installed with a part of its thickness inserted into the substrate insertion groove 23 in the connector body 1 located below.

The connector body 1 positioned below the V-groove substrate 5 has a groove 23 having a predetermined size into which the V-groove substrate 5 into which the optical fiber is placed is formed, and the entire length is formed on the outer surface of the lower part. A lower substrate 26 having rail-shaped grooves 6 formed along the direction, and sidewalls 22 attached along the entire longitudinal direction of both upper sides of the lower substrate 26 to form a space for accommodating optical fiber splicing devices. Doing. In this case, both side walls 22 of the connector body 1 may be formed integrally with the lower substrate 26 or may be configured to combine a separate connection member, in this case, of the connector body (1) Both side cross-sections form a U-shape.

The optical fiber connection clamp 2, which is located above the center of the V-groove substrate 5, has a projecting surface 24 which protrudes from the central portion of the lower surface in a rectangular parallelepiped flat member having a predetermined thickness. The upper surface is formed in a shape such that the center portion 7 is relatively lower than the two side portions 8, that is, the two side surfaces 8 protrude out from the central portion 7. That is, the upper surface of the connection clamp (2) has a height difference α (height difference of 7 and 8) and the overall shape is symmetrical about the center.

Here, the reason why the optical fiber connection clamp 2 has the lower protruding surface 24 will be described later, but the center of action of the clamping force received from the upper and lower sides 8 of the left and right sides from the cover 1 compresses the optical fiber cladding portion. In order to have a seesaw structure that is located on the outer side of the lower end of the protrusion 24 to the outside, when the clamping force is applied by the cover 1 on one side, the opposite side is lifted up.

In addition, the projections 21 for preventing the axial movement of the optical fiber is formed on both sides of the optical fiber connection clamp 2, in particular, the material in the form of a lens that acts as a magnifying glass of a transparent material to check the state of the optical fiber connection below To help.

The coating clamps 3 installed on the left and right sides of the optical fiber connection clamp 2 are integrally formed from the circular protrusion 10 and the circular protrusion 10 accommodated in the protrusion receiving groove 11 of the connector body 1 at one end. A body portion 27 extending outwardly, a stopper 16 attached to an upper portion of the body portion 27 and having a width greater than the width of the body portion 27, and positioned at an edge of the body portion 27, Consists of the edge portion 19 to facilitate the rotation around the circular projection (10).

Here, the stopper 16 of the coating clamp protrudes out of the cover 4 and serves to prevent the cover 4 from being detached by allowing the wing 15 of the cover to be inserted into the lower part of the stopper 16. Do it.

In addition, the coating clamp 3 allows the circular projection 10 accommodated in the projection receiving groove 11 of the connector body 1 to rotate more than 90 degrees in the center of rotation, and to facilitate the initial insertion of the optical fiber. If it is rotated more than 90 degrees, even if the coating clamp (3) is left as it is so that it is not fixed again.

FIG. 2C is a cross-sectional view along the B-B line of the lid shown in FIG.

The cover 4 coupled with the connector body 1 located at the lowermost part of the optical connecting device to receive the connecting devices between the connector body 1 and to generate a clamping force is shown in FIGS. 1 and 2c. The upper surface has a height difference β (a height difference between 13 surfaces and 14 surfaces). That is, a certain portion of the upper surface of the lid 4, for example, here a certain portion of the rectangular shape has a protruding surface 13 protruding downward, the other side is a predetermined portion of the lid 4, here a rectangular shaped constant The wing 15 is cut off from the center to the end of the cover except for a certain width of the portion, i.e., both side ends.

In addition, the rail latch 17 of the cover 4 is formed in the lower part of the cover 4 so as to be combined with the rail groove 6 of the connector body 1. The rail latch 17 is inclined at an angle of, for example, 90 degrees to the inside of the cover 4 to facilitate engagement with the rail-shaped groove 6 and to move left and right.

The optical fiber clamping by the dimensional interference between the lid 4 and each clamp, that is, the connection clamp 2 and the coating clamp 3, is carried out by the dimensional interference of the 12 parts of the coating clamp 3 and the 15 parts of the lid on the coating of the optical fiber. The cladding of the optical fiber is caused by the dimensional interference between the height difference α of the connection clamp 2 and the height difference β of the cover.

3 is a view showing the moving state of the lid for explaining the principle of dimensional interference of the respective components in detail, the left portion (A) of the figure is a case where the lid (4) is in the open position.

In other words. Before the optical fiber is inserted into the splice of the optical fiber, when the cover 4 is in the open position (in OPEN) A, that is, with the cover 4 engaged with the connector body 1, the body 1 The upper surface 12 of the edge portion, which is the clamping portion of the coated clamp 3, and the wing portion 15 of the cover are separated from each other when there is a position at the center side of the coated clamp 3, so that there is no interference with the difference in dimensions. Since both protruding portions 8 of (2) are accommodated in the planar portion 14 of the lid 1, no interference of the dimensional height differences occurs, and thus no clamping force is generated.

The right side of the figure shown in FIG. 3 illustrates the dimensional interference when the cover 4 is in the closed position B. The optical fiber is inserted into the groove of the V-groove substrate 5 for connection. And the cover 1 is moved along the rail to maintain alignment, the interference of the dimension height differences between the clamps 2 and 3 and the cover 1 (interference between 12 and 15 parts and interference between α and β) The clamping force is generated, and the clamps 2 and 3 are moved downward in proportion to the amount of interference so that a force is added to fix the optical fiber cladding portion and the coating portion of the ribbon optical fiber in the structure. At this time, a large amount of clamping force is added to the optical fiber cladding so that most of the alignment holding force can be handled here, and the dimensional interference amount is adjusted so that weaker clamping force is transmitted to both ribbon optical fiber coatings so that the ribbon fiber can be broken due to the twisting of the ribbon optical fiber and the left and right shake. To prevent it.

The size interference of the coating clamp 3 varies depending on the coating thickness of the ribbon optical fiber. In general, the thickness of the ribbon optical fiber that is used as a member is 0.4mm or less, so when the 0.4mm ribbon optical fiber thickness is used, the clamping force is designed to be most applied to the coating part. The clamping force applied to the ribbon fiber is slightly reduced, but it is designed to apply a clamping force that can be applied to prevent the twisting of the ribbon fiber or the shaking of the right and left, so that ribbon fibers of various thicknesses can be applied.

The left and right movements of the cover 4 and the opening and closing of the cover 4 are guided along the rails, and the rails serve as a guideline for the clamping force during the dimensional interference of the parts and serve as a guide line for the left and right movements.

The rail (Rail) is made of a combination of the rail latch 17 of the cover 4 and the rail groove 6 of the connector body 1, in the present invention, the rail latch 17 to the cover 4, Rail grooves 6 were formed in the body 1. In addition, in order to remove the axial movement of the optical fiber when the cover 4 is moved left and right, the axial movement preventing device is required in the clamps 2 and 3, which increases the loss caused by the axial movement during clamping, partial stress application, and damage to the optical fiber. You can prevent it. To this end, in the present invention, a cylindrical rod protrusion 10 is formed on the coating clamp 3, and a protrusion accommodating groove 11 is formed on the connector body 1 to remove the axial push shape. When the cover 4 is closed (when clamped) (B position in FIG. 3), the inner part 9 of which the upper part of the cover 4 is cut off is coated with a clamp so that the cover 4 is not detached from the connecting device. (3) The lid 4 was blocked by the stuffer 16 formed in the upper portion so that the cover 4 could no longer move out of the connecting device.

FIG. 4 adds a function of opening the coating clamp 3 and re-covering for clamping when inserting the ribbon optical fiber in order to easily place the ribbon optical fiber to be inserted into the V-groove substrate 5 hidden under the coating clamp 3. It shows the rotation of the coating clamp (3) to.

The rear edge portion 19 of the coating clamp 3 pressed by the cover 4 is exposed to the portion 18 which is obliquely cut at the rectangular end of the connector body 1, so that the edge portion ( 19) Holding the coating clamp (3) by rotating the coating clamp (3) to the upper part of the circular rod-shaped projection (10) and the projection receiving groove (11) of the connector body (1) to the upper part of the coating clamp (3) V-groove substrate is accommodated into the coating clamp receiving portion 9, the portion of which the upper part of the cover 4 has been removed, so as to rotate sufficiently at least 90 degrees so as not to return to the original position even when the coating clamp 3 is released. Put the ribbon optical fiber on (5) and put the coating clamp (3) down again to return to the previous step to apply the clamping force.

The implementation of the mechanical optical connector of the present invention according to the above structure will be described in more detail as follows.

If the cover 4 is pushed outward from the center of the body 1 to put one cover 4 of the optical fiber splicer in the closed state (B in FIG. 3) first, the opposite side is caused by the seesaw dynamics of the optical fiber splice clamp 2 The multi-core fiber (ribbon) can be easily inserted in.

At this time, in order to insert a plurality of optical fibers accurately and stably, each of the optical fibers should be positioned in the V-groove that matches their position. Therefore, it is formed longer than the connection clamp (2), it is highly certain that the ribbon is aligned while looking at the V-groove substrate (5) hidden under the coating clamp (3), so the circular bar projection (10) of the coating clamp (3) The coating clamp 3 is rotated more than 95 degrees around the protrusion receiving groove 11 formed in the body 1 to expose the V-groove substrate 5 hidden under the coating clamp 3 to expose the ribbon optical fiber thereon. Put it on and push it inward slowly.

When the cut portion of the ribbon optical fiber to be inserted is pushed until it reaches the lower part of the optical fiber connection clamp 2, it is naturally inserted into the center of the connection without any special operation.

After the optical fiber is inserted into the center, one ribbon is fixed by pushing the cover 4 on the optical fiber side at the center of the connecting device to the outside. Then, if the cover 4 that is initially closed is opened toward the center and the ribbon fiber insertion performed in the previous step is carried out in the same manner, it is also easily brought into contact with the cutting surface of the optical fiber first inserted by the seesaw dynamics. The optical fiber connection is completed by sliding to both sides of.

At this time, in order to check whether the cut surfaces of the two optical fibers inserted into the connecting portion are correctly contacted, the convex lens shape of the optical fiber connecting part clamp 2 is made of a transparent material to act as a magnifying glass so that the connection state of the optical fiber can be checked. It was.

Then, if the connection state is bad by monitoring and measuring the optical fiber connection state, open one cover (4), move the open ribbon to tune, and then push the cover (4) again to fix the optical fiber. In addition, it is possible to improve the insertion loss and the return loss characteristics by using a liquid refraction at the point where the optical fiber is connected to improve the splice loss.

This will be described in more detail as follows.

5 is a cross-sectional view of the optical fiber connection clamp for explaining the seesaw structure of the optical fiber connection clamp.

As shown in the figure, the structure of the optical fiber connection clamp 2 is one side of the central portion of the two-sided projection 8 that receives the clamping force from the cover 4, so that the central portion of the optical fiber connection clamp 2 is outward from the center than the seesaw role performing axis i. Closing the cover 4 of the optical fiber splice clamp 2 is lifted up, whereby the lifted height Y1 (or Y2) allows the uncoated optical fiber to be inserted as accurately as possible in the middle of the optical fiber splice clamp 2. Is determined by X, L, and θ, and the relationship between them is expressed as follows.

Y1 = (X-L / 2) tan (θ) = L1tan (θ)

Y2 = Xtan (θ)

Where X is the length from the seesaw of the fiber optic clamp

θ: angle at which the optical fiber connection clamp is lifted

Y1: Height drawn from the center of the fiber optic connection clamp

Y2: Height at which the fiber optic connection clamp is retracted from the opposite side of the clamping

L: Length from the axis of the fiber optic clamp to the end of the optical fiber clamp

L1: Length from the seesaw of the fiber optic connection clamp to the center of the optical fiber clamp

Based on this, the seesaw structure was designed, and as a result, when one cover (4) is closed, the opposite optical fiber enters the center exactly. The optical fiber connector clamp 3 can be reconfirmed by inserting the optical fiber connector clamp 3 as a magnifying glass made of a transparent material, and the tuning operation is made easier.

As described above, the optical fiber connecting device according to the present invention has a seesaw structure of the optical fiber connecting part clamp when performing the clamping function, so that single- or multi-core optical fiber connection is possible without using a special connecting tool, and the connecting part when the optical fiber is aligned. The cover on the left and right side was operated separately to facilitate the tuning work, and the optical fiber shaft was placed along the receiving groove formed in the body by placing the projection of the circular rod on the coating clamp without the addition of additional parts for the purpose of preventing movement of the coating clamp in the axial direction. In order to eliminate the connection failure caused by the shaft push by moving only in the direction perpendicular to, and to easily insert and insert the multi-core optical fiber into the groove of each V-groove board, the lower part of the coating clamp accommodated in the body Circular rod formed at one end of the coated clamp to see the hidden V-groove substrate It has a function to rotate the coating clamps around the base and provides a double clamping function for clamping not only the splice but also the ribbon fiber coating, respectively, thereby reconnecting while preventing the breakage of the fiber in tension, torsion or left and right shake. And there is an advantage to provide a reusable connection after cleaning and disassembly.

Claims (16)

An optical fiber splicing apparatus for mechanically connecting single or multi-fiber optical fibers to each other, wherein a splice space for accommodating splices for splicing optical fibers is provided therein, and an axial movement of the splices accommodated in the space is provided. An accommodation groove accommodating the protrusion for preventing the gap is formed, and a connector body having a rail groove formed along the entire length direction of the outer lower end portion; A substrate formed in a connection space formed in the connector body and having a groove in which one or a plurality of optical fibers can be placed; An optical fiber connection clamp positioned at an upper portion of a central portion of the substrate on which the optical fiber is placed to compress the cladding portion of the optical fiber; Located on both left and right sides of the optical fiber connection clamp, the groove is formed over the substrate on which the optical fiber is placed and the upper part of the connector body, and rotates within a predetermined angle with respect to the projection received in the projection receiving groove formed in the connector body. An optical fiber coating clamp for facilitating insertion of the optical fiber by pressing the optical fiber coating; Coupled with the rail-shaped groove formed in the lower part of the connector body and as the left and right movement from the center of the connector body, respectively, by pressing the clamp in the lower vertical direction through the dimensional interference with the upper surface of each clamp to fix the optical fiber Optical fiber splice device, characterized in that consisting of a cover. The optical fiber splicing apparatus according to claim 1, wherein the connector body has a U-shape in the shape of both end surfaces thereof. 2. The connector body of claim 1, wherein the connector body comprises a lower substrate having a groove having a predetermined size into which a substrate on which the optical fiber is placed is inserted, and sidewalls formed in both sides on an upper surface of the lower substrate along the entire length direction. And a connection space for accommodating the connection device. The optical fiber connecting apparatus of claim 3, wherein both ends of the connector body are cut inclined from the upper side to the lower side of the connector body so that a predetermined portion of the lower substrate is exposed. The optical fiber splicing device according to claim 1 or 3, wherein the protrusion accommodating grooves formed in the connector body are formed in both side walls. The optical fiber splicing apparatus according to claim 1, wherein the substrate having the grooves on which the optical fiber is formed is provided with one or more grooves having a V shape. The optical fiber connection device according to claim 1, wherein the optical fiber connection part clamp has a shape in which a lower surface of a portion of the rectangular parallelepiped flat member that compresses the cladding portion of the optical fiber is protruded and the upper surfaces of both sides protrude upward. The optical fiber connection device of claim 7, wherein the optical fiber connection clamp is configured to be symmetrical about the center. According to claim 1, 7 or 8, wherein the optical fiber connection clamp one side of the clamping force received from the upper left and right sides of the cover is located outward than the end of the lower end of the protrusion to compress the optical fiber cladding portion When the clamping force is applied by the cover of the optical fiber splice device characterized in that it has a seesaw structure is lifted up the other side is not applied. The optical fiber splicing device according to claim 1 or 7, wherein projections for preventing axial movement are formed on both sides of the optical fiber splice clamp. The optical fiber connection device according to claim 1 or 7, wherein the optical fiber connection clamp has a lens shape that acts as a magnifying glass made of a transparent material so that the optical fiber connection state of the lower part can be checked. According to claim 1, wherein the coating clamp is a circular projection which is accommodated in the projection receiving portion of the connector body at one side end and the body portion extending integrally with the circular projection, the stopper protruding to the upper portion of the body portion, the body portion The optical fiber splice device, characterized in that composed of an edge portion located on the edge to facilitate the rotation of the circular projection to the center of rotation. The optical fiber connecting apparatus of claim 12, wherein the stopper of the coating clamp protrudes out of the cover to prevent detachment of the cover. The optical fiber connecting device according to claim 12, wherein the coating clamp rotates the circular protrusion accommodated in the protrusion receiving groove of the connector body by at least 90 degrees with respect to the rotation center. According to claim 1, wherein the upper portion of the cover is formed in the direction toward the center of the connector body protruding below the lower surface to generate a clamping force to the lower by binding with the connector body, the outward direction of the connector body And a portion of the upper portion is cut out to form a wing portion so as to form a space for protruding the upper coating clamp to the upper cover. 16. The optical fiber splicing device according to claim 15, wherein the cover wing is inserted under the stopper of the coating clamp to prevent detachment due to the action of the clamping force.