KR101203170B1 - Optical connector for assembling in the field - Google Patents

Abstract

The present invention relates to a field assembly type optical connector that can easily connect two optical fibers to each other without light loss in the field, the field assembly type optical connector of the present invention, the upper part is open, the lower and the first and second optical fiber A connector body having an alignment plate having a cross-sectional V-shaped groove in which a core of the core is aligned and seated in a longitudinal direction; A fixing plate accommodated in an open upper portion of the connector body to fix the cores of the first and second optical fibers aligned with and seated in the V-shaped grooves; And a cover plate coupled to the connector body while pressing the fixing plate downward from the fixing plate, wherein the fixing plate is accommodated in the connector body and the cover plate is not coupled to the connector body on the inner wall of the connector body. When it is not, it is characterized by the stopper which regulates movement so that a fixed plate cannot move upward more than a fixed height.

Description

Field Assembled Optical Connector {OPTICAL CONNECTOR FOR ASSEMBLING IN THE FIELD}

The present invention relates to an optical connector, and more particularly, to a field-assembled optical connector that can be easily connected to each other without optical loss in the field.

In general, optical connectors are manufactured and supplied in the form of finished products called patch cords in which a fiber cut to a predetermined length at a factory is mounted on a ferrule through an epoxy bonding and end face polishing process and an optical connector is attached at both ends. In-patch cord has been used in the construction of optical paths. Such optical connectors include, for example, optical connectors of LC, ST, FC and SC methods.

Since the patch cords are manufactured at the factory in the form of finished products with a certain length according to the defined parameters, it is impossible to replace some light beams in the field, and the connection between the optical cables or optical fibers in the optical distribution panel, optical terminal box, etc. Connections between optical transmitters and interconnections between optical transmitters often face limitations in length.

Thus, the optical connector provided on both sides of the patch cord is converted into an assembly type so that it can be easily assembled in the field, and a patch cord having a desired length can be obtained. In other words, by using the field-assembled optical connector in the field, the two optical fiber cores are aligned and connected to each end so that the optical axes coincide with each other, and then the two optical fibers are fixed to minimize the optical loss.

Optical axis alignment and fixation of these two optical fiber cores is usually accomplished using splice members as shown in FIGS. 1 and 2. That is, the core A10 of the first optical fiber A and the core B10 of the second optical fiber B are provided in the V-shaped groove 12 formed in the longitudinal direction on the surface of the alignment plate 10. Aligned opposite each other, and then clamping the two optical fiber cores A10 and B10 optically aligned in the V-shaped groove 12 with a fixed plate 20 at a constant pressure. The angle and depth of the V-shaped groove 10 vary depending on the diameter of the optical fiber core and the like, but are formed to slightly protrude from the surface of the alignment plate 10 when the optical fiber cores A10 and B10 are aligned with the V-shaped groove 10. . Therefore, the two optical fiber cores A10 and B10 are clamped by a fixed pressure by the fixing plate 20 so that they cannot be pulled out even in the longitudinal direction with a force within a certain limit.

In this case, a specific process of optically aligning and fixing two optical fiber cores A10 and B10 is slightly different depending on the specific structure of the splice member. For example, the splice member as shown in Fig. 2 (a) is to accommodate the alignment plate 10 and the fixing plate 20 in the cross-section C-shaped elastic housing 30. In order to connect the two optical fiber cores A10 and B10, the wedge-shaped working jig 40 is inserted into the grooves 14 and 24 formed in the opening side of the elastic housing 30 in the alignment plate 10 and the fixing plate 20. Slightly spaced between the two plates (10, 20), then insert the two optical fiber cores (A10, B10) into the V-shaped grooves 12 at both ends and the working jig 40 is removed from the grooves (14, 24) The fixing is completed as shown in 2 (a). In addition, the splice member as shown in FIG. 2 (b) forms a trapezoidal groove 12 'in the alignment plate 10 and bent in a V shape in the trapezoidal groove 12'. ), The two optical fiber cores A10 and B20 are inserted into the V-shaped grooves of the metal plate 11, and the fixing operation is completed by pressing the alignment plate 10 with the fixing plate 20. In addition, the splice member shown in (c) of FIG. 2 is a splice member disclosed in Korean Patent Laid-Open No. 2011-4240, which forms a coupling groove 16 in the alignment plate 10 and is fixed to the fixing plate 20. The coupling hook 22 is formed to insert the coupling hook 22 into the coupling groove 16 to complete the fixing operation.

Although the optical connector configured as described above can be assembled in the field, there is a problem such that an operator cannot conveniently and simply perform the assembly work in the field depending on the structure. For example, the core of the optical fiber is about 125 [mu] m in diameter, and it is never easy to accurately place such a very thin optical fiber core in the V-shaped grooves 12 and 11 without any guide means. In addition, in the splice member shown in FIG. 2C, the fixing plate 20 is coupled to the coupling hook 22 even if the optical fiber cores A10 and B10 are correctly seated in the V-shaped groove 12 of the alignment plate 10. The optical fiber cores A10 and B10 may be separated from the V-shaped grooves 12 during the coupling to the alignment plate 10 using the. Therefore, excessive trial and error are often required.

In addition, the splice member described above has a variation in mechanical tightening force due to tolerances or defects of each product or a difference in the force of an operator applied during assembly, and the optical fibers A and B are pulled out even by a slight external force, or There has been a problem such that the coupling is not released even when trying to release the coupling between the two plates (10, 20) for reassembly.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a field-assembled optical connector having a constant coupling force while allowing two optical fiber cores to be connected to be precisely and simply aligned when assembled. .

Field assembly type optical connector according to the present invention for achieving the above object, the upper portion is open, the lower portion of the alignment plate formed in the longitudinal direction of the cross-sectional V-shaped groove that can be seated and aligned the core of the first and second optical fiber The connector body is formed; A fixing plate accommodated in an open upper portion of the connector body to fix the cores of the first and second optical fibers aligned with and seated in the V-shaped grooves; And a cover plate coupled to the connector body while pressing the fixing plate downward from the fixing plate, wherein the fixing plate is accommodated in the connector body and the cover plate is not coupled to the connector body on the inner wall of the connector body. When it is not, it is characterized by the stopper which regulates movement so that a fixed plate cannot move upward more than a fixed height.

In the present invention, a first elastic member may be further provided between the fixing plate and the cover plate.

Further, a second elastic member having a lower elastic modulus than the first elastic member is further added to an upper surface of the alignment plate, a lower surface of the fixing plate, or a portion where the V-shaped groove is not formed between the alignment plate and the fixing plate. It can be provided.

In addition, it is preferable that coupling hooks are formed on both sides of the cover plate, and coupling grooves through which coupling hooks penetrate at a position corresponding to the coupling hooks are formed below both sides of the connector body.

In addition, it is preferable that a funnel-shaped guide portion is formed at both ends of the alignment plate and the fixing plate in the longitudinal direction to guide the cores of the first and second optical fibers into the V-shaped grooves.

In addition, both sides of the V-shaped groove of the alignment plate may be provided with a pair of projection jaw protruding to the upper surface of the alignment plate in parallel with the V-shaped groove, the lower surface of the fixing plate and the pair of projection jaw and A pair of protrusion jaw insertion grooves into which the pair of protrusion jaws are inserted may be formed at corresponding positions.

In the field assembly type optical connector according to the present invention, by providing a fixing plate between the alignment plate and the cover plate, providing a stopper on the connector body, and allowing the fixing plate to move vertically in a constant height range while the cover plate is released. Since the optical fiber core inserted into the connector is inserted only into the V-shaped groove, it is possible to easily and easily align and connect the optical fiber in the field.

In addition, by providing an elastic member between the cover plate and the fixing plate, the pressing force for pressing the two optical fiber cores in which the fixing plate is optically aligned can be made constant so that the optical fiber is not pulled out even when the optical fiber is pulled out by a force within a certain limit. Even when the cover plate is released to replace or reconnect the optical fiber, it can be easily released with a constant force.

1 is a conceptual perspective view illustrating a process of aligning and fixing two optical fiber cores in a conventional field assembly optical connector.
FIG. 2 is a schematic cross-sectional view illustrating a process of aligning and fixing two optical fiber cores in a typical field assembly optical connector.
3 is a perspective view of a field assembly optical connector according to the present invention.
FIG. 4 is an exploded perspective view of the field assembly type optical connector shown in FIG. 3.
FIG. 5 is a perspective view illustrating an internal configuration of a connector body in the field assembled optical connector shown in FIGS. 3 and 4.
FIG. 6 is a perspective view of the fixing plate viewed from below in the field assembly type optical connector illustrated in FIGS. 3 and 4.
7 to 9 are schematic diagrams for explaining a process of aligning and fixing two optical fiber cores using the field-assembled optical connector illustrated in FIGS. 3 to 6.

Hereinafter, the principles and preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms or words used in the specification and claims should not be construed as having a conventional or dictionary meaning, and the inventors should properly explain the concept of terms in order to best explain their own invention. Based on the principle that can be defined, it should be interpreted as meaning and concept corresponding to the technical idea of the present invention. Therefore, the embodiments described in this specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention and do not represent all the technical ideas of the present invention. Therefore, It is to be understood that equivalents and modifications are possible.

Field-mounted optical connectors according to the present invention are readily available for Fiber To The Home (FTTH) and / or Fiber To The X (FTTX) network installations. Examples are shown in FIGS. 3 and 4. On the other hand, the optical connector of the present embodiment will be described taking the optical connector of the LC method as an example, of course, the present invention is also applicable to other types of connector such as the SC method. In addition, in the following description and claims, terms indicating positions such as front, rear, left, right, top, and bottom are used to describe or define a coupling relationship among the components constituting the optical connector of the present embodiment. However, this means only the direction of the bar shown in the drawings, the relative position according to the viewing direction may be referred to any number of course.

3 and 4, the field assembly type optical connector according to the present embodiment is a splice unit, which is a characteristic configuration of the present invention, to connect the connector body 100, the fixing plate 120, and the cover plate 130. Equipped. In addition, the field-assembled optical connector of the present embodiment is coupled to the connector body 100 via a spring 200 to elastically support the connector body 100 and clamping the jacket of the second optical fiber (B) ( 300, the splice unit, the housings 410 and 420 for receiving the ferrule 160 and the spring 200 on which the core A10 of the first optical fiber A is supported, and the clamping member 300 are coupled to the clamping member. Boot 300 to provide a tightening force to the second optical fiber (B) jacket portion 300.

In the optical connector of the present embodiment described above, the ferrule 160, the spring 200, the clamping member 300, the housings 410 and 420 and the boot 500 are substantially the same as the field assembly optical connector and its function and structure. Since the description thereof is equivalent, the detailed description thereof will be omitted, and the present invention will be described in detail with reference to FIGS.

As described above, the optical connector of the present embodiment includes a connector body 100, a fixing plate 120, and a cover plate 130 as a splice unit.

The connector body 100 has a rectangular box shape with an open top. In addition, an alignment plate 110 may be mounted or integrally formed under the connector body 100. In the center of the upper surface of the alignment plate 110, a cross-sectional V-shaped groove 111 in which the cores A10 and B10 of the first and second optical fibers A and B are aligned and connected is formed along the longitudinal direction. The depth and size of this V-shaped groove 111 is dimensioned so that the optical fiber cores A10 and B10 project slightly from the top surface of the alignment plate 110 when the optical fiber cores A10 and B10 are seated in the V-shaped groove 111. For example, when the diameter D (see FIG. 8) of the optical fiber cores A10 and B10 is about 125 μm, the depth d of the V-shaped groove 111 is about 137.5 μm, and the optical fiber cores A10 and B10 are When seated in the V-shaped groove 111, the angle can be adjusted so as to project about 50㎛ from the top surface of the alignment plate 110.

Both ends of the V-shaped groove 111 are each an optical fiber insertion hole 113 into which the core B10 of the second optical fiber clamped by the first optical fiber core A10 and the clamping member 300 supported by the ferrule 160 is inserted. ). Both ends of the V-shaped groove 111 form a semiconical guide portion 116 such that the optical fiber cores A10 and B10 to be inserted are inserted only into the V-shaped groove 111 accurately. The semi-conical guide portion 116 forms a cone, that is, a funnel-shaped guide portion with the semi-conical guide portions 126 of symmetrical shapes formed on the fixing plate described later.

On the other hand, the relatively small groove 112 formed on the side of the alignment plate 110 passes through the stopper 102, which will be described later, when the alignment plate 110 is assembled or mounted from the opened upper side of the connector body 100. The stopper through groove 112 is to be made.

The stopper 102 protrudes from the inner side wall of the connector main body 100 into the connector main body 100. The stopper 102 is provided when the fixing plate 120 described later is housed in the connector body 100 and the cover plate 130 described later is not coupled to the connector body 100 (that is, the cover plate 130 is connected to the connector). When released from the main body), the fixing plate 120 is capable of vertical movement in a predetermined range upwards, and serves to regulate the vertical movement so as not to move above a certain height (to be described in detail later). In addition, grooves 104 are formed in both lower portions of the connector body 100. The groove 104 is a coupling groove 104 to which the coupling hook 134 of the cover plate 130 described later is coupled to the connector body 100.

The fixing plate 120 serves to press down and fix the cores A10 and B10 of the first and second optical fibers aligned and connected to the V-shaped groove 111. To this end, the fixing plate 120 is basically flat, and has a structure and size that can be accommodated in an open upper portion of the connector body 100. That is, the fixing plate 120 is substantially the same size or slightly smaller than the opening of the connector body 100, the stopper through groove 122 through which the above-mentioned stopper 102 can pass through the stopper 102 It is formed at the corresponding position. In addition, a hook through groove 124 is formed at a side of the fixing plate 120 at a position corresponding to the coupling hook 134 of the cover plate 130 to be described later.

However, the lengthwise dimension of the fixing plate 120 is slightly smaller (eg, about 5 mm) than the length of the opening of the connector body 100. In addition, the thickness of the fixing plate 120 is set slightly smaller (eg, about 80 to 90 μm) than the separation distance between the upper surface of the alignment plate 110 and the lower surface of the stopper 120 described above. By the setting of the longitudinal dimension and the thickness of the fixing plate 120, the fixing plate 120 is accommodated in the connector body 100 and horizontally movable in the longitudinal direction, and also in the thickness direction in the stopper 102. You can move vertically until it stops. In other words, by storing the fixing plate 120 in the connector main body 100 and then moving the fixing plate 120 in the longitudinal direction, the stopper through groove 122 and the stopper 102 are shifted from each other so that the connector main body 100 can be shifted. Even if reversed, the fixing plate 120 is not separated from the connector body 100.

In addition, although the hook through groove 124 is formed at a position corresponding to the engaging hook 134 of the cover plate 130, it is strictly understood that after the fixing plate 120 is accommodated in the connector body 100, When the fixing plate 120 is moved to the end as far as possible to move in the longitudinal direction, the position of the hook through groove 124 and the coupling hook 134 of the cover plate 130 coincide. That is, in a state in which the fixing plate 120 is not stored and then moved in the longitudinal direction, the coupling hook 134 may not be fastened to the coupling groove 104, and the coupling hook 134 is fastened to the coupling groove 104. Fixing plate 120 is fixed in the horizontal direction it is impossible to move horizontally in the longitudinal direction.

On the other hand, at both ends of the fixing plate 120 in the longitudinal direction, semi-conical guide portions 126 symmetric with the semi-conical guide portions 116 formed at both ends of the V-shaped groove 111 of the alignment plate 110 described above are formed. It is. Therefore, when the fixing plate 120 is accommodated in the connector body 100, the optical fiber cores A10 and B10 are formed by forming a conical, funnel-shaped guide part together with the semi-conical guide part 116 of the alignment plate 110. ) Is naturally inserted only into the V-shaped groove (111).

The cover plate 130 is configured to be coupled to the connector body 100 while pressing the fixing plate 120 downward. Specifically, the cover plate 130 is received and fastened to the connector body 100 while pressing the fixing plate 120. To this end, the overall size of the cover plate 130 is about the same as or slightly smaller than the opening of the connector body 100, and the stopper insertion groove 132 into which the above-described stopper 102 can be inserted into the stopper 102 on the side thereof. It is formed at the corresponding position. In addition, the side of the cover plate 130 has a coupling hook 134 is formed to pass through the hook through groove 124 of the fixing plate 120 is coupled to the coupling groove 104.

The field assembly type optical connector according to the present embodiment as described above has a fixing plate 120 between the alignment plate 110 and the cover plate 130, and allows the fixing plate to be vertically movable in a certain range and By providing a stopper 102 for restricting the movement beyond the height, the optical fiber cores A10 and B10 are not inserted into the V-shaped groove 111 or separated from the V-shaped groove 111 so that Make assembly work much simpler and easier.

On the other hand, the field assembly optical connector according to the present invention may further include the following additional configuration.

First, as shown in FIG. 4, a first elastic member 140 may be further provided between the fixing plate 120 and the cover plate 130. The first elastic member 140 is fixed to the fixing plate 120 that presses and fixes the cores A10 and B10 of the first and second optical fibers aligned and connected to the V-shaped groove 111 of the alignment plate 110. In addition to providing an appropriate pressing force, the cover plate 130 is appropriately elastically deformed so that the coupling hooks 134 provided on both sides thereof are caught and fixed to the coupling groove 104 of the connector body 100 with appropriate elasticity. On the other hand, the first elastic member 140 is shown as a leaf spring, but is not necessarily limited to the leaf spring. That is, the first elastic member 140 may be replaced with an elastic body such as rubber, the shape and characteristics of which are maintained within a temperature or humidity range required by the environment in which the optical connector is disposed.

In addition, between the alignment plate 110 and the fixing plate 120, preferably on the upper surface of the alignment plate 110, or the lower surface of the fixing plate 120 as shown in Fig. 4 (however, V-shaped groove 111) The second elastic member 150 may be further provided at a portion where the second elastic member 150 is not formed. The second elastic member 150 has a fixed height when the fixing plate 120 is accommodated in the connector body 100 and the cover plate 130 is not coupled to the connector body 100. As much as (e.g., h in FIG. 8) to make room for the insertion of the optical fiber cores A10 and B10 simply. On the other hand, in the configuration having a second elastic member in addition to the above-described first elastic member 140, the elastic modulus of the first elastic member 140 needs to be larger than the elastic modulus of the second elastic member 150. That is, when the same force is applied, the second elastic member 150 needs to be more easily deformed. When the fixing plate 120 is pressed by coupling the cover plate 130 to the connector body 100 after the alignment and connection of the optical fiber cores A10 and B10, the second elastic member 150 is deformed first. This is because the lower surface of the fixing plate 120 should be fixed by pressing the optical fiber core while contacting the optical fiber cores A10 and B10.

In addition, as shown in FIG. 5, both sides of the V-shaped groove 111 of the alignment plate 110 have a pair of protruding jaws protruding to the upper surface of the alignment plate 110 in parallel with the V-shaped groove 111. 119 may be formed. This pair of protruding jaws 119 has a function of limiting the lift height of the fixing plate 120 by the stopper 102 to be described later, and the very thin optical fiber cores A10 and B10 are separated from the V-shaped groove 111. Prevent it.

In addition, when a pair of protruding jaw 119 is formed on the upper surface of the alignment plate 110, as shown in FIG. 6, a pair of protruding jaws 119 also on the lower surface of the fixing plate 120. It is preferable that a pair of protrusion jaw insertion grooves 129 into which a pair of protrusion jaws are inserted are formed at positions corresponding to the shape, thereby ensuring ease of assembly and accuracy.

The operation and effect of the present invention will be described by explaining the process of assembling (aligning and connecting two optical fiber cores) the optical connector according to the present invention configured as described above with reference to Figs.

First, the optical fiber may be provided in the form of a jacketed cable comprising an outer jacket (eg with a buffer coating or the like), a core (eg a bare clad / core) and a strength member. In a preferred example, the strength member comprises aramid, Kevlar or polyester yarn or strand disposed between the inner surface of the optical fiber jacket and the outer surface of the coating.

In order to connect the optical fiber using the field-assembled optical connector according to the present invention, after inserting the second optical fiber (B) into the boot 500, a part of the optical fiber jacket is cut off, and the coating portion of the optical fiber is peeled off to give the core B10. ) And cut the end of the core B10 of the second optical fiber to match the end of the core A10 of the first optical fiber pre-installed. For example, the jacket of about 50 mm may be removed and leave the peeled core B10 of about 25 mm. On the other hand, since the core B10 of the cut second optical fiber can be optically coupled by the splice unit, there is no need to polish the end portion. The boot 500 slides over the second optical fiber B and later couples to the clamping member 300 and the housing 420. When the coating of the optical fiber is removed as described above, the core B10 of the second optical fiber is cleaned using alcohol and gauze.

Subsequent to, or preceding or in parallel with, preparation of the second optical fiber core B10, as shown in FIG. 7, the stopper through groove 122 of the fixing plate 120 and the stopper 102 of the connector body 100 are shown. Arranged to accommodate the fixing plate 120 in the connector body 100, and horizontally moved in the longitudinal direction as indicated by the arrow S. Then, the fixing plate 120 is not caught by the stopper 102 even if the connector body 100 is turned upside down.

Subsequently, the core B10 of the second optical fiber prepared as described above is inserted into the core insertion hole 113 by passing through the clamping member 300 as shown in FIG. 8. Then, the optical fiber core B10 is naturally V-shaped by the funnel-shaped guide portion formed by the semi-conical guide portion 116 of the alignment plate 110 and the semi-conical guide portion 126 of the fixing plate 120. Only the groove 111 is to be inserted. In addition, although the fixing plate 120 is lifted upward by the above-mentioned second elastic member 150, the diameter D = 125 of the optical fiber cores A10 and B10 is about 80 to 90 mu m as the lifted amount h1 is about 80 to 90 mu m. Smaller than the micrometer, the optical fiber cores A10 and B10 cannot be inserted beyond the V-shaped grooves 111. Furthermore, the optical fiber cores A10 and B10 cannot be separated from the V-shaped grooves 111 by the pair of protrusions 119 formed on both sides of the V-shaped grooves 111 described above.

When the core B10 of the second optical fiber is inserted to meet the core A10 of the first optical fiber, the second optical fiber B is bent to align and connect the cores A10 and B10 of the first and second optical fibers. You can see that this is complete.

In this state, when the cover plate 130 is accommodated in the connector body 100 via the first elastic member 140 and coupled while pressing the fixing plate 120, the two optical fibers are connected and fixed as shown in FIG. 9. Is completed. At this time, the fixing plate 120 is pressed downward to press down the optical fiber cores A10 and B10 to h2 = h (about 50 μm), and the optical fiber is not pulled out even when pulled out.

As such, when the connection of the optical fiber is completed, the boot 500 and the clamping member 300 are screwed together while the curved optical fiber is pulled back to maintain a straight state. The connector body 100 and the housings 410 and 420 are coupled to each other.

As described above, the field assembly connector according to the present invention can be connected to the field without trial and error within a short time in the field.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the scope of the invention.

For example, although the connector body 100 is illustrated and described in a box shape having a rectangular cross section, the cross-sectional shape of the connector body 100 may be formed of a polygon such as a circle or a hexagon. In addition, although the coupling hook 134 is formed in the cover plate 130 and the coupling groove 104 is formed in the connector body 100 in the above-described embodiment, the formation position of the coupling hook and the coupling groove is Can be interchanged. Furthermore, the coupling of the cover plate 130 to the connector body 100 may be made by other possible coupling means such as screw coupling, not by the coupling hook 134 and the coupling groove 104. In addition, the number and positions of the coupling hook 134 and the coupling groove 104 and the hook through groove 124, the stopper 102 and the stopper through grooves 112 and 122, and the stopper insertion groove 132 may be changed.

Therefore, the true scope of protection of the present invention should be defined by the appended claims.

Claims (7)

A connector body having an alignment plate formed at an upper portion thereof and having an alignment plate having a cross-sectional V-shaped groove formed at a lower portion thereof in which a core of the first and second optical fibers can be aligned and seated;
A fixing plate accommodated in an open upper portion of the connector body to fix the cores of the first and second optical fibers aligned with and seated in the V-shaped grooves;
A cover plate coupled to the connector body while pressing the fixing plate downward from the fixing plate; And
And a first elastic member interposed between the fixing plate and the cover plate.
On the inner wall of the connector body, when the fixing plate is accommodated in the connector body and the cover plate is not coupled to the connector body, a stopper for restricting the movement so that the fixing plate cannot move upwards or above a certain height is provided. Field assembly type optical connector, characterized in that provided. delete The method of claim 1,
A second elastic member having a smaller elastic modulus than the first elastic member is further added to an upper surface of the alignment plate, a lower surface of the fixing plate, or a portion where the V-shaped groove is not formed between the alignment plate and the fixing plate. Field assembly type optical connector characterized in that it comprises. The method according to claim 1 or 3,
Coupling hooks are formed on both sides of the cover plate, respectively, and on both sides of the connector main body, a coupling groove to which the coupling hook penetrates is formed at a position corresponding to the coupling hook. Optical connector. The method according to claim 1 or 3,
And a funnel-shaped guide portion for guiding the cores of the first and second optical fibers to be inserted into the V-shaped grooves at both ends of the alignment plate and the longitudinal plates. The method according to claim 1 or 3,
And a pair of protruding jaws protruding from the upper surface of the alignment plate in parallel to the V-shaped groove on both sides of the V-shaped groove of the alignment plate. The method according to claim 6,
And a pair of protrusion jaw insertion grooves formed at a position corresponding to the pair of protrusion jaws at a lower surface of the fixing plate to insert the pair of protrusion jaws.

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