JPH0926527A - Multi-fiber optical connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the working stability and working efficiency of clamping by projectingly providing a pressure plate with a fiber pressing part for pressing optical fibers toward the deep parts of positioning grooves when this press plate is mounted at a press plate mounting surface. SOLUTION: The multi-fiber optical connector 1 is constituted by clamping plural pieces of the optical fibers 6 positioned by the positioning grooves 5 disposed on the press plate mounting surface 3 between a connector body 2 and the press plate 4 mounted at the press plate mounting surface 3 of this connector body 2 and inserting these optical fibers 6 butt-connectably with other optical fibers 6. The press plate 4 is constituted by providing the surface on one side of a flat planar cap body 10 with the fiber pressing part 11 which is formed of a low-Young's modulus material and presses the optical fibers 6 toward the deep parts of the positioning grooves 5 at the time when the press plate is mounted at the press plate mounting surface 3 of the connector body 2. Then, the depth of insertion of the fiber pressing part 11 into the press plate insertion groove 7 is regulated and the parallelism of the positioning grooves 5 with a contact surface 12 is assured.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-fiber optical connector in which a plurality of optical fibers are internally butt-connectable with other optical fibers.

[0002]

2. Description of the Related Art Conventionally, various types of mechanical splices (optical connectors) have been proposed in which optical fibers which are not connector-terminated are detachably butted and connected to each other in the field.

[0003]

By the way, the above-mentioned mechanical splice is generally used for a single core, and an optical connector for a multi-core fiber is under development. In particular, if the pressing force for supporting the optical fiber in the positioning groove formed in the housing varies, the positioning accuracy of the optical fiber decreases and the splice loss characteristic deteriorates. It was desired to develop a mechanical splice for multiple cores that can obtain accuracy. In addition, the conventional MT connector (Mechanically Transferable)
When connecting an optical fiber terminal to the ferrule by field insertion, various jigs and devices for fiber insertion, or a resin potting curing device for fiber fixing are also necessary, and it is not possible to carry such equipment into the field. It is possible.

The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a multi-fiber optical connector in which the work efficiency of attaching the optical connector to the tip of the optical fiber in the field is improved. Is.

[0005]

The present invention has the following features to attain the object mentioned above. That is, in the multi-fiber optical connector according to claim 1, a plurality of optical fibers are positioned between the connector body and the holding plate mounted on the holding plate mounting surface of the connector body by the positioning groove provided on the holding plate mounting surface. Is a multi-fiber optical connector that clamps the optical fiber of No. 1 and is installed so that the optical fiber can be butt-connected to another optical fiber, the optical fiber being mounted on the pressing plate on the pressing plate mounting surface. The means for solving the above-mentioned problem is to provide the fiber pressing portion that presses toward the projection.

According to a second aspect of the present invention, in the multi-fiber connector of the first aspect, at least the fiber pressing portion of the holding plate is formed of a low Young's modulus material, and the low Young's modulus material forming portion of the holding plate. The formation of the ultraviolet ray transmitting layer on the other portions was taken as a means for solving the above problems.

In the multi-fiber optical connector according to claim 3, the multi-fiber optical connector according to claim 1 or 2 is plastically deformed to surround the connector body and the holding plate on the holding plate mounting surface of the connector body. Further, it is a means for solving the above-mentioned problems to provide a sandwiching member that is sandwichable in the direction of being pressed against each other.

A multi-fiber optical connector according to a fourth aspect is the multi-fiber optical connector according to any one of the first to third aspects, in which elasticity is provided by applying elastic force to the connector body and the pressing plate to press them against each other. It is a means for solving the above-mentioned problems that a member is provided, and a pressure receiving portion pressed by the elastic member is provided on each of the connector body and the pressing plate.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION A first embodiment of a multi-fiber optical connector of the present invention will be described below with reference to FIG. Reference numeral 1 in the figure is a multi-fiber optical connector of the present embodiment. As shown in FIG. 1, this multi-fiber optical connector 1 is provided with a presser plate between a connector body 2 having a U-shaped cross section and a presser plate 4 mounted on a presser plate mounting surface 3 of the connector body 2. A plurality of optical fibers 6 positioned by the positioning groove 5 provided on the plate mounting surface 3 are clamped to internally mount the optical fibers 6 so that they can be butt-connected with other optical fibers 6.

The multi-fiber optical connector 1 is an MT connector ferrule. The connector body 2 is a member having a U-shaped cross section in which a holding plate insertion groove 7 into which the holding plate 4 is inserted is formed in the center of the cross section, and is entirely formed of resin or the like. A pin insertion hole 8 for a positioning fitting pin is formed in the connector body 2 in the cross-sectional direction and on both sides of the holding plate insertion groove 7 when the mating optical fiber connector 1 is butted. The bottom surface of the holding plate insertion groove 7 is the holding plate mounting surface 3. A plurality of positioning grooves 5 (four in FIG. 1) are formed in parallel with each other at least at the end of the pressing plate mounting surface 3 on the tip side (front side in FIG. 1) in the butting direction. Although the positioning groove 5 shown in the drawing is a V groove, various shapes such as a U shape can be applied as the sectional shape of the positioning groove. The end surface 9 of the connector body 2 on the butting tip side is a flat surface perpendicular to the axis of the positioning groove 5.

The pressing plate 4 is formed of a material having a low Young's modulus on one surface of the flat plate-shaped lid main body 10.
A fiber pressing portion 11 is provided for pressing the optical fiber 6 toward the deep portion of the positioning groove 5 when the optical fiber 6 is mounted on the holding plate mounting surface 3 of the connector body 2. Silicon rubber or the like is applied as a material for forming the fiber pressing portion 11. The lid main body 10 can be widely applied as long as it has appropriate rigidity. Further, the pressing plate 4 may be entirely formed of the low Young's modulus material such as the silicone rubber. The fiber pressing portion 11 is the lid body 10
The protrusion is formed so as to have a shape substantially matching the holding plate insertion groove 7 of the connector body 2. The fiber pressing portion 11 has a contact surface 12 that contacts the optical fiber 6.
A configuration in which only the vicinity of is formed of a low Young's modulus material may be used.

The operation and effect of the multi-fiber optical connector 1 of this embodiment will be described below. To attach the multi-fiber optical connector 1 to the tip of the optical fiber 6, first, the connector body 2
The optical fiber 6 is placed on each of the positioning grooves 5, and the contact surface 12 of the optical fiber 6 or the pressing plate 4 is coated with an adhesive, and the contact surface 12 is pressed using a dedicated jig or the like. The pressing plate 4 is pushed into the pressing plate insertion groove 7 by approaching the pressing plate 4 so as to overlap the plate mounting surface 3. Hereinafter, the clamped state of the connector body 2 and the holding plate 4 is held until the adhesive is hardened, and the connector body 2, the holding plate 4 and the optical fiber 6 are integrally bonded and fixed.

According to the multi-fiber optical connector 1, when the optical fiber 6 is clamped between the connector body 2 and the pressing plate 4, the fiber pressing portion 11 is elastic according to the pressing force applied to the optical fiber 6. It deforms and the pressing force acting on the entire clamp portion of the optical fiber 6 acts uniformly. Therefore, the positioning accuracy of the optical fiber 6 in the positioning groove 5 is secured, the connection loss characteristic is improved, and damage to the optical fiber 6 due to the concentration of the pressing force can be avoided. Further, the pressing force difference between the optical fibers 6 is reduced, and all the optical fibers 6 can be positioned with high accuracy. Further, due to elastic deformation of the fiber pressing portion 11, the pressing plate 4
Since the forming error of the contact surface 12 is absorbed, the dimensional accuracy of the pressing plate 4 can be relaxed, and the manufacturing efficiency of the multi-fiber optical connector 1 is improved.

In addition, the multi-fiber optical connector 1 of this embodiment
In the case of attaching the holding plate 4 to the connector body 2, the lower surface 15 of the portion of the holding plate 4 projecting to the outside of the fiber pressing portion 11 of the lid body 10 has the both side walls 1 of the connector body 2.
3 are abutted on the upper surfaces 14 which are flush with each other, the insertion depth of the fiber pressing portion 11 into the holding plate insertion groove 7 is restricted, and when the lower surface 15 abuts on the entire upper surface 14, Since the positioning groove 5 and the contact surface 12 are kept parallel to each other, it is possible to prevent the concentration of the pressing force on the specific location of the optical fiber 6 and the concentration of the pressing force on the specific optical fiber 6, thereby further reducing the connection loss. It is possible to improve the characteristics and increase the number of optical connectors.

Next, a second embodiment of the present invention will be described with reference to FIGS. Reference numeral 20 in the figure is a multi-fiber optical connector of the present embodiment. The multi-fiber optical connector 20 of the present embodiment is similar to the multi-fiber optical connector 1 of the first embodiment, except that the connector body 2 and the connector body 2 are
The holding plate 4 attached to the holding member is clamped from the outside, and the holding member 21 is provided to apply the clamping force of the optical fiber 6 between the connector body 2 and the holding plate 4. In the figure, the same components as those in FIG. 1 are denoted by the same reference numerals, and the description will be simplified.

The holding member 21 is, as shown in FIG.
The metal plate is formed in a substantially U-shaped cross section, and the inner surface side of the metal plate is abutted against the outer surface 22 of the holding plate 4 or the lower surface 23 of the connector body 2 of the pair of the connector body 2 and the holding plate 4 which are integrated. Of the connector body 2 and the holding plate 4 when the web 24 contacts the outer surface 22 of the holding plate 4 or the lower surface 23 of the connector body 2 and extends substantially vertically from both sides of the web 24. It has a pair of flanges 25 having a length protruding outwardly of the lower surface 23 of the connector body 2 or the outer surface 22 of the holding plate 4 along both side surfaces of the pair.
The sandwiching member 21 is formed of a material that is plastically deformable and has appropriate elasticity even after the deformation.

A multi-fiber optical connector 20 is attached to the tip of the optical connector 6.
2 and 3, the optical connector 6 is clamped between the connector body 2 and the holding plate 4, and then the web 24 is attached to the outer surface 22 of the holding plate 4 or the connector body 2 as shown in FIGS. The lower surface 23 of the connector main body 2 of the flange 25 or the outwardly projecting portion of the outer surface 22 of the holding plate 4 is bent inwardly so as to be held by the holding member 21. The connector body 2 and the holding plate 4 are clamped. By doing so, the clamping force between the connector body 2 and the pressing plate 4 is applied by the holding member 21. At this time, Web 2
The clamp force may be adjusted by inserting an elastic sheet or the like between the outer surface 22 of the pressing plate 4 or the lower surface 23 of the connector body 2 that abuts the web 4 and the web 22. In addition,
The clamping force is applied by the holding member 21 at least until the adhesive that bonds the connector body 2, the pressing plate 4, and the optical fiber 6 is cured. Further, the multi-fiber optical connector 20 can be used while being clamped by the holding member 21. In this case, the clamped state of the connector body 2, the pressing plate 4, and the optical fiber 6 is protected by the sandwiching member 21, so that the clamped state can be stably maintained for a long period of time.

Therefore, according to the multi-fiber optical connector 20 of the present embodiment, the clamping force of the optical fiber 6 can be applied only by bending the flange 25 of the sandwiching member 21, and after clamping by the sandwiching member 21. Since the connector body 2, the pressing plate 4 and the optical connector 6 can be bonded to each other only by maintaining the clamped state at least until the adhesive is hardened, the work efficiency of attachment to the tip of the optical fiber 6 is improved. In particular, assembling the multi-fiber optical connector 20 is extremely simple, so that the assembling time is greatly shortened. Further, the holding member 21 is formed so as to be substantially in close contact with the outer surfaces of the connector body 2 and the pressing plate 4, so that it can be easily made compact.

The holding member may be a leaf spring material or the like formed in a clip shape capable of holding the connector body and the holding plate. In this case, the connector body and the holding plate are held by the elastic force of the holding member.

Next, a third embodiment of the present invention will be described with reference to FIG. Reference numeral 30 in the figure is a multi-fiber optical connector of the present embodiment. Multi-fiber optical connector 3 of the present embodiment
In the multi-fiber optical connector 1 described in the first embodiment, 0 is provided with a communication hole 31 that can communicate with the connector body 2 when the retainer plate 4 is attached to the connector body 2 and the retainer plate 4, respectively. Then, as an elastic member which is disposed in the communicating hole 31 which is communicated with the connector body 2 and the holding plate 4, the clamping force of the optical fiber 6 is applied between the connector body 2 and the holding plate 4. The rod-shaped connecting member 32 is provided. In FIG. 1, FIG.
The same components as those described above are denoted by the same reference numerals, and description thereof will be simplified.

Of the communication holes 31, the body side holes 33 formed in the connector body 2 are the side walls 13 of the connector body 2.
Is a through-hole having a circular cross section that penetrates through in the thickness direction (vertical direction in FIG. 4). Bottom surface 3 of the connector body 2 of the body side hole 33
The vicinity of the opening that opens to 4 is a tapered expanded portion 35 that is expanded in a tapered shape. The holding plate side hole 36 formed in the holding plate 4 penetrates in the thickness direction at a position communicating with the body side hole 33 of the holding plate body 10 when the holding plate 4 is integrated with the connector body 2. The main body side hole 33 is mainly formed of a portion having a circular cross section with the same diameter as the main body side hole 33. Upper surface 1 of the holding plate 4 of the holding plate side hole 36
In the opening portion that opens to 4, there is formed a locking expanded diameter portion 38 that is expanded in diameter so as to lock the engaging projection 37 that is projected at the tip of the connecting member 32. The tapered expanded portion 35 and the locking expanded portion 38 both function as a pressure receiving portion that is pressed by the elastic force of the connecting member 32.

The connecting member 32 is entirely made of a metal material having an appropriate elasticity, and can be inserted into the body side hole 33 and the holding plate side hole 36 having the engaging protrusion 37 at one end.
Moreover, the main body side hole 33 and the pressing plate side hole 36 are formed mainly of a shaft portion 39 having an outer surface that comes into close contact with the inner surfaces. At the other end of the shaft portion 39, a claw 40 having a shape obtained by dividing the other end by a plurality of slits along the longitudinal direction of the shaft portion 39.
A radial engagement portion 41 having a shape that radially expands is formed. The length from the engagement projection 37 to the tip of each claw 40 of the radial engagement portion 41 is slightly shorter than the total length when the body side hole 33 and the holding plate side hole 36 are communicated with each other. At least the radiation engagement portion 41 of the connecting member 32 needs to be formed of a material having elasticity, and the other portions may be formed of a material having low elasticity.

To attach the multi-fiber optical connector 30 to the ends of the plurality of optical fibers 6, first, the connector body 2
The optical fiber 6 is sandwiched between the holding plate 4 and the holding plate 4 so that the optical fiber 6 can be clamped. At this time, the relative positions of the connector body 2 and the holding plate 4 are adjusted so that the body side hole 33 and the holding plate side hole 36 communicate with each other. By doing so, the connecting member 32 can be inserted into the body side hole 33 and the holding plate side hole 36 that are in communication with each other, and the connector body 2 and the holding plate 4 are also positioned. At this time, the injection of the adhesive for bonding the connector body 2, the pressing plate 4, and the optical fiber 6 is also completed in advance.

Next, the radial engagement portion 4 is attached to the locking expanded portion 38.
By inserting 1 and pushing it in as it is, half or more of the radial engagement portion 41 is positioned in the tapered enlarged diameter portion 35. At this time, the radial engagement portion 41 can be easily inserted into the holding plate side hole 36 by using, for example, a funnel-shaped jig. Further, the radial engagement portion 41 may be positioned in the taper enlarged diameter portion 35, and then the nail 40 may be plastically deformed by crimping or the like to be radially expanded.

In the multi-fiber optical connector 30, the coupling member 32 is connected to the connector body 2 by engaging the claws 40 of the radial expansion portion 41 reaching the tapered expansion portion 35 with the tapered expansion portion 35. A clamping force for clamping the optical fiber 6 is applied between the pressing plate 4 and the pressing plate 4.

Therefore, in the multi-fiber optical connector 30 of the present embodiment, the connecting member 32 is simply inserted into the body side hole 33 and the holding plate side hole 36 in the communicating state, so that the connector body 2 and the holding plate 4 are connected. Since the clamping force for clamping the optical fiber 6 can be applied, the working efficiency of the assembly is significantly improved, and since the connecting member 32 is not exposed, the clamping force is unlikely to be impaired by a shock or the like, so that the clamping state can be maintained for a long time. It can be maintained stable. Further, since the shaft portion 39 of the connecting member 32 has an outer surface that comes into close contact with the inner surfaces of the main body side hole 33 and the holding plate side hole 36, the connector body can be simply inserted into the main body side hole 33 and the holding plate side hole 36. The relative position between 2 and the pressing plate 4 can be precisely maintained.

The connecting member 32 may have another structure such as a spring structure as long as it can apply the clamping force of the optical fiber 6 to the connector body 2 and the pressing plate 4 at the same time when it is inserted into the communication hole 31. I don't mind. Further, it is not always necessary to form the outer surface of the shaft portion 39 into a shape that is in close contact with the inner surfaces of the main body side hole 33 and the pressing plate side hole 36. In this case, a holding means for holding the relative positions of the main body side hole 33 and the pressing plate side hole 36 may be separately provided.

Next, a fourth embodiment of the present invention will be described with reference to FIGS. Reference numeral 50 in the figure denotes a multi-fiber optical connector of the present embodiment. As shown in FIGS. 5 and 6, the multi-fiber optical connector 50 according to the present embodiment is inserted into a connector main body 51 having a U-shaped cross section and a holding plate mounting groove 52 opened at the center of the cross section of the connector main body 51. , A plurality of optical fibers 55 positioned by the positioning groove 54 provided in the pressing plate mounting groove 52 are clamped between the optical fiber 55 and the pressing plate 53 made of a low Young's modulus material. The press plates 56 are arranged above and below the connector body 51 (up and down in FIG. 5) so that they can be butt-connected to the optical fiber, and these press plates 56 are connected by a plurality of springs 57 as elastic members. The clamping force of the optical fiber 55 between the connector body 51 and the pressing plate 53 is applied by the elastic force.

The multi-fiber optical connector 50 is a ferrule of an MT type connector, and has pin insertion holes 59 for positioning fitting pins formed in both side walls 58 located on both sides of the holding plate mounting groove 52. It is said that.

The holding plate 53 is entirely made of a material having a low Young's modulus such as silicon rubber, and is formed into a shape that can be housed in the holding plate mounting groove 52 when inserted into the holding plate mounting groove 52. The lower portion of the holding plate 53 functions as a fiber pressing portion that presses the optical fiber 55 placed in the positioning groove 54. As shown in FIG. 6, the holding plate 53 has a low Young's modulus layer 53a having a cushioning property formed in a portion of the holding plate 53 which is in contact with the optical fiber 55, and has a high ultraviolet transmittance in other portions. UV transparent layer 53
b may be formed. The ultraviolet transmission layer 53
Acrylic resin or the like is suitable as b. in this case,
The degree of freedom in selecting the material for forming the holding plate 53 is increased, and the cost can be reduced and the workability can be improved.

The pressing plate 56 includes a bottom plate 61 which comes into contact with the lower surface 60 of the connector body 51, and a top plate 63 which is arranged on the upper surface 62 side of the connector body 51 and presses the holding plate 53. The bottom plate 61 is a flat plate having a size protruding in the width direction of the connector body 51 (left and right in FIG. 5). Top 6
3, a pressing protrusion 64 for contacting the upper surface 65 of the pressing plate 53 with the central portion of a flat plate having a shape substantially the same as that of the bottom plate 61 and pressing the pressing plate 53 to the inner side of the pressing plate mounting groove 52. Is projected. The lower surface 60 of the connector main body 51 and the upper surface 65 of the pressing plate 53 are pressed by the pressing force of the spring 57 via the bottom plate 61 and the top plate 63, respectively, in the direction in which the connector main body 51 and the pressing plate 53 are pressed against each other. It is considered a division. The top plate 63 may be a flat plate as shown in FIG. 6 when the pressing plate 53 inserted into the pressing plate mounting groove 52 is flush with the upper surface 62 of the connector body 51.

The spring 57 is used for the connector body 51.
Are arranged on both sides of the bottom plate 61 and the top plate 63, respectively. The spring 57 is configured to uniformly apply a clamping force between the bottom plate 61 and the top plate 63 by its elastic force.

In order to assemble the multi-fiber optical connector 50, first, the holding plate 53 is inserted into the holding plate mounting groove 52 and the optical fiber 55 placed in the positioning groove 54 is inserted between the connector body 51 and the holding plate 53. Next, the bottom plate 61 and the top plate 63 are arranged above and below the pair of the connector main body 51 and the pressing plate 53, and the elasticity of the spring 57 is applied to the optical fiber 55, so that the optical fiber 55 is connected to the connector main body 51 and the pressing plate 53. Clamp between and. The clamped state of the optical fiber 55 is maintained at least until the adhesive that bonds the connector body 51, the pressing plate 53, and the optical fiber 55 to each other is cured. Further, when the ultraviolet ray transmitting layer 53b is installed, the ultraviolet ray curable adhesive injected around the optical fiber 55 sandwiched between the connector body 51 and the pressing plate 53 is utilized by using the ultraviolet ray transmitting layer 53b. Since it can be cured by irradiating it with ultraviolet rays, the bonding time can be greatly shortened.

According to the multi-fiber optical connector 50 of the present embodiment, the connector main body 51 and the pressing plate 53 are sandwiched between the bottom plate 61 and the top plate 63, whereby the connector main body 51 is inserted.
And a holding plate 53 having a shape that can be stored in the holding plate mounting groove 52.
Since the clamping force of the optical fiber 55 can be applied between and, the overall size can be reduced. Further, after the connector main body 51, the pressing plate 53, and the optical fiber 55 are bonded, the bottom plate 61, the top plate 63, and the spring 57 may be separated or may be left attached. When the bottom plate 61, the top plate 63, and the spring 57 are separated, it is possible to provide a more compact multi-fiber optical connector. In addition, when the top plate 63 having the pressing protrusions 64 is used, the upper surfaces 62 of the side walls 58 of the connector main body 51 are
Dimensional accuracy is eased and the manufacturing efficiency of the multi-core connector is improved.

In each of the embodiments, the connector bodies 2 and 51 may have a structure in which the whole or a part of the main body 2 has an ultraviolet ray transmitting portion made of an ultraviolet ray transmitting material. In this case, by using an ultraviolet curable adhesive as the adhesive, the assembly work of the multi-fiber optical connector can be performed in a shorter time.

[0036]

As described above, according to the multi-fiber optical connector of the first aspect, the holding plate mounting surface is provided between the connector body and the holding plate mounted on the holding plate mounting surface of the connector body. A multi-fiber optical connector that clamps a plurality of optical fibers positioned by a positioning groove provided on the optical fiber and internally mounts the optical fibers so that they can be butt-connected to other optical fibers. When the optical fiber is pressed into the positioning groove when it is mounted, the optical fiber can be pressed securely into the positioning groove, improving the work stability and work efficiency of the clamp. To do.

According to the multi-fiber optical connector of claim 2,
2. The multi-core connector according to claim 1, wherein at least the fiber pressing portion of the holding plate is formed of a low Young's modulus material, and the ultraviolet ray transmitting layer is formed on a portion other than the portion of the holding plate on which the low Young's modulus material is formed. Since the elastic force of the elastic fiber uniformly acts on the pressing force applied to the optical fiber, the positioning accuracy of the optical fiber in the positioning groove is secured, the splice loss characteristics are improved, and the optical fiber is damaged due to the concentration of the pressing force. It is possible to avoid the above problems and reduce the pressing force difference between the optical fibers to be clamped, so that all the optical fibers can be positioned with high accuracy.
Further, the elastic deformation of the fiber pressing portion absorbs the formation error of the contact surface of the pressing plate, so that the dimensional accuracy of the pressing plate can be relaxed, and the manufacturing efficiency of the multi-fiber optical connector is improved. Further, since the connector body, the holding plate and the optical fiber can be adhered to each other with the ultraviolet curable adhesive, the adhering time is shortened and the assembly work efficiency is improved.

According to the multi-fiber optical connector of claim 3,
The multi-fiber optical connector according to claim 1 or 2, further comprising a holding member that is plastically deformed to surround the connector body and a holding plate on a holding plate mounting surface of the connector body and can hold the holding plate in a direction in which they are pressed against each other. By doing so, it can be made extremely small, and it is possible to save the installation space and improve the mounting density on the support or the like.

According to the multi-fiber optical connector of claim 4,
The multi-fiber optical connector according to any one of claims 1 to 3, further comprising: an elastic member that applies a pressing force to press the connector body and the pressing plate against each other with an elastic force, and the connector body and the pressing plate are respectively provided with the elastic member. By providing the pressure receiving portion that is pressed by the elastic member, the elastic force of the elastic member secures the pressure contact force between the connector main body and the holding plate, so that the optical fiber of the optical fiber is resistant to external force such as vibration and impact. The clamping force can be stably maintained and the clamping force of the optical fiber can be maintained for a long period of time.

[Brief description of drawings]

FIG. 1 is a perspective view showing a first embodiment of a multi-fiber optical connector of the present invention.

FIG. 2 is an exploded perspective view showing a second embodiment of a multi-fiber optical connector of the present invention.

FIG. 3 is a perspective view showing the operation of the second embodiment of the multi-fiber optical connector of the present invention.

FIG. 4 is a sectional perspective view showing a third embodiment of the multi-fiber optical connector of the present invention.

FIG. 5 is a front view showing a fourth embodiment of the multi-fiber optical connector of the present invention.

FIG. 6 is a view showing a fourth embodiment of the multi-fiber optical connector of the present invention and is a front view showing another aspect of the top plate.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Multi-fiber optical connector, 2 ... Connector body, 3 ... Holding plate mounting surface, 4 ... Holding plate, 5 ... Positioning groove, 6 ... Optical fiber,
11 ... Fiber pressing portion, 20 ... Multi-fiber optical connector, 21 ...
Clamping member, 30 ... Multi-fiber optical connector, 32 ... Elastic member (coupling member), 35 ... Pressure receiving portion (taper expanded portion), 38 ... Pressure receiving portion (locking expanded portion), 50 ... Multi-fiber optical connector, 51 ... Connector body, 53 ... Holding plate, 53a ... Low Young's modulus layer, 53
b ... Ultraviolet transmission layer, 57 ... Elastic member (spring), 6
0 ... Pressure receiving portion (lower surface), 65 ... Pressure receiving portion (upper surface).

Claims (4)

[Claims] 1. A connector body (2, 51) and a retaining plate (4, 5) mounted on a retaining plate mounting surface (3) of the connector body.
3), a plurality of optical fibers (6, 6) positioned by the positioning grooves (5, 54) provided on the holding plate mounting surface.
55) is clamped so that the optical fiber can be abutted and connected with another optical fiber.
0, 30, 50), and a fiber pressing portion (1) that presses the optical fiber toward the deep part of the positioning groove when the optical fiber is mounted on the pressing plate on the pressing plate mounting surface.
A multi-fiber optical connector characterized in that 1) is projected. 2. The multi-fiber optical connector according to claim 1, wherein at least the fiber pressing portion (53a) of the holding plate is formed of a low Young's modulus material, and the portion other than the low Young's modulus material forming portion of the holding plate. A multi-fiber optical connector characterized in that an ultraviolet ray transmitting layer (53b) is formed on the optical fiber. 3. The multi-fiber optical connector according to claim 1, wherein the connector body and the retaining plate mounting surface of the connector body are surrounded by the retaining plate by being plastically deformed so as to be pressed against each other. A multi-fiber optical connector comprising a sandwiching member (21) capable of sandwiching. 4. The multi-fiber optical connector according to any one of claims 1 to 3, wherein the elastic member (3) applies an elastic force to the connector body and the pressing plate to press them against each other.
2, 57), and pressure receiving portions (35, 3) that are pressed against the connector body and the pressing plate by the elastic member.
8, 60, 65) is provided.